| 1 | /* tc-mips.c -- assemble code for a MIPS chip. |
| 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
| 3 | 2003, 2004, 2005 Free Software Foundation, Inc. |
| 4 | Contributed by the OSF and Ralph Campbell. |
| 5 | Written by Keith Knowles and Ralph Campbell, working independently. |
| 6 | Modified for ECOFF and R4000 support by Ian Lance Taylor of Cygnus |
| 7 | Support. |
| 8 | |
| 9 | This file is part of GAS. |
| 10 | |
| 11 | GAS is free software; you can redistribute it and/or modify |
| 12 | it under the terms of the GNU General Public License as published by |
| 13 | the Free Software Foundation; either version 2, or (at your option) |
| 14 | any later version. |
| 15 | |
| 16 | GAS is distributed in the hope that it will be useful, |
| 17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | GNU General Public License for more details. |
| 20 | |
| 21 | You should have received a copy of the GNU General Public License |
| 22 | along with GAS; see the file COPYING. If not, write to the Free |
| 23 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 24 | 02110-1301, USA. */ |
| 25 | |
| 26 | #include "as.h" |
| 27 | #include "config.h" |
| 28 | #include "subsegs.h" |
| 29 | #include "safe-ctype.h" |
| 30 | |
| 31 | #include <stdarg.h> |
| 32 | |
| 33 | #include "opcode/mips.h" |
| 34 | #include "itbl-ops.h" |
| 35 | #include "dwarf2dbg.h" |
| 36 | #include "dw2gencfi.h" |
| 37 | |
| 38 | #ifdef DEBUG |
| 39 | #define DBG(x) printf x |
| 40 | #else |
| 41 | #define DBG(x) |
| 42 | #endif |
| 43 | |
| 44 | #ifdef OBJ_MAYBE_ELF |
| 45 | /* Clean up namespace so we can include obj-elf.h too. */ |
| 46 | static int mips_output_flavor (void); |
| 47 | static int mips_output_flavor (void) { return OUTPUT_FLAVOR; } |
| 48 | #undef OBJ_PROCESS_STAB |
| 49 | #undef OUTPUT_FLAVOR |
| 50 | #undef S_GET_ALIGN |
| 51 | #undef S_GET_SIZE |
| 52 | #undef S_SET_ALIGN |
| 53 | #undef S_SET_SIZE |
| 54 | #undef obj_frob_file |
| 55 | #undef obj_frob_file_after_relocs |
| 56 | #undef obj_frob_symbol |
| 57 | #undef obj_pop_insert |
| 58 | #undef obj_sec_sym_ok_for_reloc |
| 59 | #undef OBJ_COPY_SYMBOL_ATTRIBUTES |
| 60 | |
| 61 | #include "obj-elf.h" |
| 62 | /* Fix any of them that we actually care about. */ |
| 63 | #undef OUTPUT_FLAVOR |
| 64 | #define OUTPUT_FLAVOR mips_output_flavor() |
| 65 | #endif |
| 66 | |
| 67 | #if defined (OBJ_ELF) |
| 68 | #include "elf/mips.h" |
| 69 | #endif |
| 70 | |
| 71 | #ifndef ECOFF_DEBUGGING |
| 72 | #define NO_ECOFF_DEBUGGING |
| 73 | #define ECOFF_DEBUGGING 0 |
| 74 | #endif |
| 75 | |
| 76 | int mips_flag_mdebug = -1; |
| 77 | |
| 78 | /* Control generation of .pdr sections. Off by default on IRIX: the native |
| 79 | linker doesn't know about and discards them, but relocations against them |
| 80 | remain, leading to rld crashes. */ |
| 81 | #ifdef TE_IRIX |
| 82 | int mips_flag_pdr = FALSE; |
| 83 | #else |
| 84 | int mips_flag_pdr = TRUE; |
| 85 | #endif |
| 86 | |
| 87 | #include "ecoff.h" |
| 88 | |
| 89 | #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) |
| 90 | static char *mips_regmask_frag; |
| 91 | #endif |
| 92 | |
| 93 | #define ZERO 0 |
| 94 | #define AT 1 |
| 95 | #define TREG 24 |
| 96 | #define PIC_CALL_REG 25 |
| 97 | #define KT0 26 |
| 98 | #define KT1 27 |
| 99 | #define GP 28 |
| 100 | #define SP 29 |
| 101 | #define FP 30 |
| 102 | #define RA 31 |
| 103 | |
| 104 | #define ILLEGAL_REG (32) |
| 105 | |
| 106 | /* Allow override of standard little-endian ECOFF format. */ |
| 107 | |
| 108 | #ifndef ECOFF_LITTLE_FORMAT |
| 109 | #define ECOFF_LITTLE_FORMAT "ecoff-littlemips" |
| 110 | #endif |
| 111 | |
| 112 | extern int target_big_endian; |
| 113 | |
| 114 | /* The name of the readonly data section. */ |
| 115 | #define RDATA_SECTION_NAME (OUTPUT_FLAVOR == bfd_target_ecoff_flavour \ |
| 116 | ? ".rdata" \ |
| 117 | : OUTPUT_FLAVOR == bfd_target_coff_flavour \ |
| 118 | ? ".rdata" \ |
| 119 | : OUTPUT_FLAVOR == bfd_target_elf_flavour \ |
| 120 | ? ".rodata" \ |
| 121 | : (abort (), "")) |
| 122 | |
| 123 | /* Information about an instruction, including its format, operands |
| 124 | and fixups. */ |
| 125 | struct mips_cl_insn |
| 126 | { |
| 127 | /* The opcode's entry in mips_opcodes or mips16_opcodes. */ |
| 128 | const struct mips_opcode *insn_mo; |
| 129 | |
| 130 | /* True if this is a mips16 instruction and if we want the extended |
| 131 | form of INSN_MO. */ |
| 132 | bfd_boolean use_extend; |
| 133 | |
| 134 | /* The 16-bit extension instruction to use when USE_EXTEND is true. */ |
| 135 | unsigned short extend; |
| 136 | |
| 137 | /* The 16-bit or 32-bit bitstring of the instruction itself. This is |
| 138 | a copy of INSN_MO->match with the operands filled in. */ |
| 139 | unsigned long insn_opcode; |
| 140 | |
| 141 | /* The frag that contains the instruction. */ |
| 142 | struct frag *frag; |
| 143 | |
| 144 | /* The offset into FRAG of the first instruction byte. */ |
| 145 | long where; |
| 146 | |
| 147 | /* The relocs associated with the instruction, if any. */ |
| 148 | fixS *fixp[3]; |
| 149 | |
| 150 | /* True if this entry cannot be moved from its current position. */ |
| 151 | unsigned int fixed_p : 1; |
| 152 | |
| 153 | /* True if this instruction occurred in a .set noreorder block. */ |
| 154 | unsigned int noreorder_p : 1; |
| 155 | |
| 156 | /* True for mips16 instructions that jump to an absolute address. */ |
| 157 | unsigned int mips16_absolute_jump_p : 1; |
| 158 | }; |
| 159 | |
| 160 | /* The ABI to use. */ |
| 161 | enum mips_abi_level |
| 162 | { |
| 163 | NO_ABI = 0, |
| 164 | O32_ABI, |
| 165 | O64_ABI, |
| 166 | N32_ABI, |
| 167 | N64_ABI, |
| 168 | EABI_ABI |
| 169 | }; |
| 170 | |
| 171 | /* MIPS ABI we are using for this output file. */ |
| 172 | static enum mips_abi_level mips_abi = NO_ABI; |
| 173 | |
| 174 | /* Whether or not we have code that can call pic code. */ |
| 175 | int mips_abicalls = FALSE; |
| 176 | |
| 177 | /* Whether or not we have code which can be put into a shared |
| 178 | library. */ |
| 179 | static bfd_boolean mips_in_shared = TRUE; |
| 180 | |
| 181 | /* This is the set of options which may be modified by the .set |
| 182 | pseudo-op. We use a struct so that .set push and .set pop are more |
| 183 | reliable. */ |
| 184 | |
| 185 | struct mips_set_options |
| 186 | { |
| 187 | /* MIPS ISA (Instruction Set Architecture) level. This is set to -1 |
| 188 | if it has not been initialized. Changed by `.set mipsN', and the |
| 189 | -mipsN command line option, and the default CPU. */ |
| 190 | int isa; |
| 191 | /* Enabled Application Specific Extensions (ASEs). These are set to -1 |
| 192 | if they have not been initialized. Changed by `.set <asename>', by |
| 193 | command line options, and based on the default architecture. */ |
| 194 | int ase_mips3d; |
| 195 | int ase_mdmx; |
| 196 | int ase_dsp; |
| 197 | int ase_mt; |
| 198 | /* Whether we are assembling for the mips16 processor. 0 if we are |
| 199 | not, 1 if we are, and -1 if the value has not been initialized. |
| 200 | Changed by `.set mips16' and `.set nomips16', and the -mips16 and |
| 201 | -nomips16 command line options, and the default CPU. */ |
| 202 | int mips16; |
| 203 | /* Non-zero if we should not reorder instructions. Changed by `.set |
| 204 | reorder' and `.set noreorder'. */ |
| 205 | int noreorder; |
| 206 | /* Non-zero if we should not permit the $at ($1) register to be used |
| 207 | in instructions. Changed by `.set at' and `.set noat'. */ |
| 208 | int noat; |
| 209 | /* Non-zero if we should warn when a macro instruction expands into |
| 210 | more than one machine instruction. Changed by `.set nomacro' and |
| 211 | `.set macro'. */ |
| 212 | int warn_about_macros; |
| 213 | /* Non-zero if we should not move instructions. Changed by `.set |
| 214 | move', `.set volatile', `.set nomove', and `.set novolatile'. */ |
| 215 | int nomove; |
| 216 | /* Non-zero if we should not optimize branches by moving the target |
| 217 | of the branch into the delay slot. Actually, we don't perform |
| 218 | this optimization anyhow. Changed by `.set bopt' and `.set |
| 219 | nobopt'. */ |
| 220 | int nobopt; |
| 221 | /* Non-zero if we should not autoextend mips16 instructions. |
| 222 | Changed by `.set autoextend' and `.set noautoextend'. */ |
| 223 | int noautoextend; |
| 224 | /* Restrict general purpose registers and floating point registers |
| 225 | to 32 bit. This is initially determined when -mgp32 or -mfp32 |
| 226 | is passed but can changed if the assembler code uses .set mipsN. */ |
| 227 | int gp32; |
| 228 | int fp32; |
| 229 | /* MIPS architecture (CPU) type. Changed by .set arch=FOO, the -march |
| 230 | command line option, and the default CPU. */ |
| 231 | int arch; |
| 232 | /* True if ".set sym32" is in effect. */ |
| 233 | bfd_boolean sym32; |
| 234 | }; |
| 235 | |
| 236 | /* True if -mgp32 was passed. */ |
| 237 | static int file_mips_gp32 = -1; |
| 238 | |
| 239 | /* True if -mfp32 was passed. */ |
| 240 | static int file_mips_fp32 = -1; |
| 241 | |
| 242 | /* This is the struct we use to hold the current set of options. Note |
| 243 | that we must set the isa field to ISA_UNKNOWN and the ASE fields to |
| 244 | -1 to indicate that they have not been initialized. */ |
| 245 | |
| 246 | static struct mips_set_options mips_opts = |
| 247 | { |
| 248 | ISA_UNKNOWN, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, CPU_UNKNOWN, FALSE |
| 249 | }; |
| 250 | |
| 251 | /* These variables are filled in with the masks of registers used. |
| 252 | The object format code reads them and puts them in the appropriate |
| 253 | place. */ |
| 254 | unsigned long mips_gprmask; |
| 255 | unsigned long mips_cprmask[4]; |
| 256 | |
| 257 | /* MIPS ISA we are using for this output file. */ |
| 258 | static int file_mips_isa = ISA_UNKNOWN; |
| 259 | |
| 260 | /* True if -mips16 was passed or implied by arguments passed on the |
| 261 | command line (e.g., by -march). */ |
| 262 | static int file_ase_mips16; |
| 263 | |
| 264 | /* True if -mips3d was passed or implied by arguments passed on the |
| 265 | command line (e.g., by -march). */ |
| 266 | static int file_ase_mips3d; |
| 267 | |
| 268 | /* True if -mdmx was passed or implied by arguments passed on the |
| 269 | command line (e.g., by -march). */ |
| 270 | static int file_ase_mdmx; |
| 271 | |
| 272 | /* True if -mdsp was passed or implied by arguments passed on the |
| 273 | command line (e.g., by -march). */ |
| 274 | static int file_ase_dsp; |
| 275 | |
| 276 | /* True if -mmt was passed or implied by arguments passed on the |
| 277 | command line (e.g., by -march). */ |
| 278 | static int file_ase_mt; |
| 279 | |
| 280 | /* The argument of the -march= flag. The architecture we are assembling. */ |
| 281 | static int file_mips_arch = CPU_UNKNOWN; |
| 282 | static const char *mips_arch_string; |
| 283 | |
| 284 | /* The argument of the -mtune= flag. The architecture for which we |
| 285 | are optimizing. */ |
| 286 | static int mips_tune = CPU_UNKNOWN; |
| 287 | static const char *mips_tune_string; |
| 288 | |
| 289 | /* True when generating 32-bit code for a 64-bit processor. */ |
| 290 | static int mips_32bitmode = 0; |
| 291 | |
| 292 | /* True if the given ABI requires 32-bit registers. */ |
| 293 | #define ABI_NEEDS_32BIT_REGS(ABI) ((ABI) == O32_ABI) |
| 294 | |
| 295 | /* Likewise 64-bit registers. */ |
| 296 | #define ABI_NEEDS_64BIT_REGS(ABI) \ |
| 297 | ((ABI) == N32_ABI \ |
| 298 | || (ABI) == N64_ABI \ |
| 299 | || (ABI) == O64_ABI) |
| 300 | |
| 301 | /* Return true if ISA supports 64 bit gp register instructions. */ |
| 302 | #define ISA_HAS_64BIT_REGS(ISA) ( \ |
| 303 | (ISA) == ISA_MIPS3 \ |
| 304 | || (ISA) == ISA_MIPS4 \ |
| 305 | || (ISA) == ISA_MIPS5 \ |
| 306 | || (ISA) == ISA_MIPS64 \ |
| 307 | || (ISA) == ISA_MIPS64R2 \ |
| 308 | ) |
| 309 | |
| 310 | /* Return true if ISA supports 64-bit right rotate (dror et al.) |
| 311 | instructions. */ |
| 312 | #define ISA_HAS_DROR(ISA) ( \ |
| 313 | (ISA) == ISA_MIPS64R2 \ |
| 314 | ) |
| 315 | |
| 316 | /* Return true if ISA supports 32-bit right rotate (ror et al.) |
| 317 | instructions. */ |
| 318 | #define ISA_HAS_ROR(ISA) ( \ |
| 319 | (ISA) == ISA_MIPS32R2 \ |
| 320 | || (ISA) == ISA_MIPS64R2 \ |
| 321 | ) |
| 322 | |
| 323 | #define HAVE_32BIT_GPRS \ |
| 324 | (mips_opts.gp32 || ! ISA_HAS_64BIT_REGS (mips_opts.isa)) |
| 325 | |
| 326 | #define HAVE_32BIT_FPRS \ |
| 327 | (mips_opts.fp32 || ! ISA_HAS_64BIT_REGS (mips_opts.isa)) |
| 328 | |
| 329 | #define HAVE_64BIT_GPRS (! HAVE_32BIT_GPRS) |
| 330 | #define HAVE_64BIT_FPRS (! HAVE_32BIT_FPRS) |
| 331 | |
| 332 | #define HAVE_NEWABI (mips_abi == N32_ABI || mips_abi == N64_ABI) |
| 333 | |
| 334 | #define HAVE_64BIT_OBJECTS (mips_abi == N64_ABI) |
| 335 | |
| 336 | /* True if relocations are stored in-place. */ |
| 337 | #define HAVE_IN_PLACE_ADDENDS (!HAVE_NEWABI) |
| 338 | |
| 339 | /* The ABI-derived address size. */ |
| 340 | #define HAVE_64BIT_ADDRESSES \ |
| 341 | (HAVE_64BIT_GPRS && (mips_abi == EABI_ABI || mips_abi == N64_ABI)) |
| 342 | #define HAVE_32BIT_ADDRESSES (!HAVE_64BIT_ADDRESSES) |
| 343 | |
| 344 | /* The size of symbolic constants (i.e., expressions of the form |
| 345 | "SYMBOL" or "SYMBOL + OFFSET"). */ |
| 346 | #define HAVE_32BIT_SYMBOLS \ |
| 347 | (HAVE_32BIT_ADDRESSES || !HAVE_64BIT_OBJECTS || mips_opts.sym32) |
| 348 | #define HAVE_64BIT_SYMBOLS (!HAVE_32BIT_SYMBOLS) |
| 349 | |
| 350 | /* Addresses are loaded in different ways, depending on the address size |
| 351 | in use. The n32 ABI Documentation also mandates the use of additions |
| 352 | with overflow checking, but existing implementations don't follow it. */ |
| 353 | #define ADDRESS_ADD_INSN \ |
| 354 | (HAVE_32BIT_ADDRESSES ? "addu" : "daddu") |
| 355 | |
| 356 | #define ADDRESS_ADDI_INSN \ |
| 357 | (HAVE_32BIT_ADDRESSES ? "addiu" : "daddiu") |
| 358 | |
| 359 | #define ADDRESS_LOAD_INSN \ |
| 360 | (HAVE_32BIT_ADDRESSES ? "lw" : "ld") |
| 361 | |
| 362 | #define ADDRESS_STORE_INSN \ |
| 363 | (HAVE_32BIT_ADDRESSES ? "sw" : "sd") |
| 364 | |
| 365 | /* Return true if the given CPU supports the MIPS16 ASE. */ |
| 366 | #define CPU_HAS_MIPS16(cpu) \ |
| 367 | (strncmp (TARGET_CPU, "mips16", sizeof ("mips16") - 1) == 0 \ |
| 368 | || strncmp (TARGET_CANONICAL, "mips-lsi-elf", sizeof ("mips-lsi-elf") - 1) == 0) |
| 369 | |
| 370 | /* Return true if the given CPU supports the MIPS3D ASE. */ |
| 371 | #define CPU_HAS_MIPS3D(cpu) ((cpu) == CPU_SB1 \ |
| 372 | ) |
| 373 | |
| 374 | /* Return true if the given CPU supports the MDMX ASE. */ |
| 375 | #define CPU_HAS_MDMX(cpu) (FALSE \ |
| 376 | ) |
| 377 | |
| 378 | /* Return true if the given CPU supports the DSP ASE. */ |
| 379 | #define CPU_HAS_DSP(cpu) (FALSE \ |
| 380 | ) |
| 381 | |
| 382 | /* Return true if the given CPU supports the MT ASE. */ |
| 383 | #define CPU_HAS_MT(cpu) (FALSE \ |
| 384 | ) |
| 385 | |
| 386 | /* True if CPU has a dror instruction. */ |
| 387 | #define CPU_HAS_DROR(CPU) ((CPU) == CPU_VR5400 || (CPU) == CPU_VR5500) |
| 388 | |
| 389 | /* True if CPU has a ror instruction. */ |
| 390 | #define CPU_HAS_ROR(CPU) CPU_HAS_DROR (CPU) |
| 391 | |
| 392 | /* True if mflo and mfhi can be immediately followed by instructions |
| 393 | which write to the HI and LO registers. |
| 394 | |
| 395 | According to MIPS specifications, MIPS ISAs I, II, and III need |
| 396 | (at least) two instructions between the reads of HI/LO and |
| 397 | instructions which write them, and later ISAs do not. Contradicting |
| 398 | the MIPS specifications, some MIPS IV processor user manuals (e.g. |
| 399 | the UM for the NEC Vr5000) document needing the instructions between |
| 400 | HI/LO reads and writes, as well. Therefore, we declare only MIPS32, |
| 401 | MIPS64 and later ISAs to have the interlocks, plus any specific |
| 402 | earlier-ISA CPUs for which CPU documentation declares that the |
| 403 | instructions are really interlocked. */ |
| 404 | #define hilo_interlocks \ |
| 405 | (mips_opts.isa == ISA_MIPS32 \ |
| 406 | || mips_opts.isa == ISA_MIPS32R2 \ |
| 407 | || mips_opts.isa == ISA_MIPS64 \ |
| 408 | || mips_opts.isa == ISA_MIPS64R2 \ |
| 409 | || mips_opts.arch == CPU_R4010 \ |
| 410 | || mips_opts.arch == CPU_R10000 \ |
| 411 | || mips_opts.arch == CPU_R12000 \ |
| 412 | || mips_opts.arch == CPU_RM7000 \ |
| 413 | || mips_opts.arch == CPU_VR5500 \ |
| 414 | ) |
| 415 | |
| 416 | /* Whether the processor uses hardware interlocks to protect reads |
| 417 | from the GPRs after they are loaded from memory, and thus does not |
| 418 | require nops to be inserted. This applies to instructions marked |
| 419 | INSN_LOAD_MEMORY_DELAY. These nops are only required at MIPS ISA |
| 420 | level I. */ |
| 421 | #define gpr_interlocks \ |
| 422 | (mips_opts.isa != ISA_MIPS1 \ |
| 423 | || mips_opts.arch == CPU_R3900) |
| 424 | |
| 425 | /* Whether the processor uses hardware interlocks to avoid delays |
| 426 | required by coprocessor instructions, and thus does not require |
| 427 | nops to be inserted. This applies to instructions marked |
| 428 | INSN_LOAD_COPROC_DELAY, INSN_COPROC_MOVE_DELAY, and to delays |
| 429 | between instructions marked INSN_WRITE_COND_CODE and ones marked |
| 430 | INSN_READ_COND_CODE. These nops are only required at MIPS ISA |
| 431 | levels I, II, and III. */ |
| 432 | /* Itbl support may require additional care here. */ |
| 433 | #define cop_interlocks \ |
| 434 | ((mips_opts.isa != ISA_MIPS1 \ |
| 435 | && mips_opts.isa != ISA_MIPS2 \ |
| 436 | && mips_opts.isa != ISA_MIPS3) \ |
| 437 | || mips_opts.arch == CPU_R4300 \ |
| 438 | ) |
| 439 | |
| 440 | /* Whether the processor uses hardware interlocks to protect reads |
| 441 | from coprocessor registers after they are loaded from memory, and |
| 442 | thus does not require nops to be inserted. This applies to |
| 443 | instructions marked INSN_COPROC_MEMORY_DELAY. These nops are only |
| 444 | requires at MIPS ISA level I. */ |
| 445 | #define cop_mem_interlocks (mips_opts.isa != ISA_MIPS1) |
| 446 | |
| 447 | /* Is this a mfhi or mflo instruction? */ |
| 448 | #define MF_HILO_INSN(PINFO) \ |
| 449 | ((PINFO & INSN_READ_HI) || (PINFO & INSN_READ_LO)) |
| 450 | |
| 451 | /* MIPS PIC level. */ |
| 452 | |
| 453 | enum mips_pic_level mips_pic; |
| 454 | |
| 455 | /* 1 if we should generate 32 bit offsets from the $gp register in |
| 456 | SVR4_PIC mode. Currently has no meaning in other modes. */ |
| 457 | static int mips_big_got = 0; |
| 458 | |
| 459 | /* 1 if trap instructions should used for overflow rather than break |
| 460 | instructions. */ |
| 461 | static int mips_trap = 0; |
| 462 | |
| 463 | /* 1 if double width floating point constants should not be constructed |
| 464 | by assembling two single width halves into two single width floating |
| 465 | point registers which just happen to alias the double width destination |
| 466 | register. On some architectures this aliasing can be disabled by a bit |
| 467 | in the status register, and the setting of this bit cannot be determined |
| 468 | automatically at assemble time. */ |
| 469 | static int mips_disable_float_construction; |
| 470 | |
| 471 | /* Non-zero if any .set noreorder directives were used. */ |
| 472 | |
| 473 | static int mips_any_noreorder; |
| 474 | |
| 475 | /* Non-zero if nops should be inserted when the register referenced in |
| 476 | an mfhi/mflo instruction is read in the next two instructions. */ |
| 477 | static int mips_7000_hilo_fix; |
| 478 | |
| 479 | /* The size of the small data section. */ |
| 480 | static unsigned int g_switch_value = 8; |
| 481 | /* Whether the -G option was used. */ |
| 482 | static int g_switch_seen = 0; |
| 483 | |
| 484 | #define N_RMASK 0xc4 |
| 485 | #define N_VFP 0xd4 |
| 486 | |
| 487 | /* If we can determine in advance that GP optimization won't be |
| 488 | possible, we can skip the relaxation stuff that tries to produce |
| 489 | GP-relative references. This makes delay slot optimization work |
| 490 | better. |
| 491 | |
| 492 | This function can only provide a guess, but it seems to work for |
| 493 | gcc output. It needs to guess right for gcc, otherwise gcc |
| 494 | will put what it thinks is a GP-relative instruction in a branch |
| 495 | delay slot. |
| 496 | |
| 497 | I don't know if a fix is needed for the SVR4_PIC mode. I've only |
| 498 | fixed it for the non-PIC mode. KR 95/04/07 */ |
| 499 | static int nopic_need_relax (symbolS *, int); |
| 500 | |
| 501 | /* handle of the OPCODE hash table */ |
| 502 | static struct hash_control *op_hash = NULL; |
| 503 | |
| 504 | /* The opcode hash table we use for the mips16. */ |
| 505 | static struct hash_control *mips16_op_hash = NULL; |
| 506 | |
| 507 | /* This array holds the chars that always start a comment. If the |
| 508 | pre-processor is disabled, these aren't very useful */ |
| 509 | const char comment_chars[] = "#"; |
| 510 | |
| 511 | /* This array holds the chars that only start a comment at the beginning of |
| 512 | a line. If the line seems to have the form '# 123 filename' |
| 513 | .line and .file directives will appear in the pre-processed output */ |
| 514 | /* Note that input_file.c hand checks for '#' at the beginning of the |
| 515 | first line of the input file. This is because the compiler outputs |
| 516 | #NO_APP at the beginning of its output. */ |
| 517 | /* Also note that C style comments are always supported. */ |
| 518 | const char line_comment_chars[] = "#"; |
| 519 | |
| 520 | /* This array holds machine specific line separator characters. */ |
| 521 | const char line_separator_chars[] = ";"; |
| 522 | |
| 523 | /* Chars that can be used to separate mant from exp in floating point nums */ |
| 524 | const char EXP_CHARS[] = "eE"; |
| 525 | |
| 526 | /* Chars that mean this number is a floating point constant */ |
| 527 | /* As in 0f12.456 */ |
| 528 | /* or 0d1.2345e12 */ |
| 529 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; |
| 530 | |
| 531 | /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be |
| 532 | changed in read.c . Ideally it shouldn't have to know about it at all, |
| 533 | but nothing is ideal around here. |
| 534 | */ |
| 535 | |
| 536 | static char *insn_error; |
| 537 | |
| 538 | static int auto_align = 1; |
| 539 | |
| 540 | /* When outputting SVR4 PIC code, the assembler needs to know the |
| 541 | offset in the stack frame from which to restore the $gp register. |
| 542 | This is set by the .cprestore pseudo-op, and saved in this |
| 543 | variable. */ |
| 544 | static offsetT mips_cprestore_offset = -1; |
| 545 | |
| 546 | /* Similar for NewABI PIC code, where $gp is callee-saved. NewABI has some |
| 547 | more optimizations, it can use a register value instead of a memory-saved |
| 548 | offset and even an other register than $gp as global pointer. */ |
| 549 | static offsetT mips_cpreturn_offset = -1; |
| 550 | static int mips_cpreturn_register = -1; |
| 551 | static int mips_gp_register = GP; |
| 552 | static int mips_gprel_offset = 0; |
| 553 | |
| 554 | /* Whether mips_cprestore_offset has been set in the current function |
| 555 | (or whether it has already been warned about, if not). */ |
| 556 | static int mips_cprestore_valid = 0; |
| 557 | |
| 558 | /* This is the register which holds the stack frame, as set by the |
| 559 | .frame pseudo-op. This is needed to implement .cprestore. */ |
| 560 | static int mips_frame_reg = SP; |
| 561 | |
| 562 | /* Whether mips_frame_reg has been set in the current function |
| 563 | (or whether it has already been warned about, if not). */ |
| 564 | static int mips_frame_reg_valid = 0; |
| 565 | |
| 566 | /* To output NOP instructions correctly, we need to keep information |
| 567 | about the previous two instructions. */ |
| 568 | |
| 569 | /* Whether we are optimizing. The default value of 2 means to remove |
| 570 | unneeded NOPs and swap branch instructions when possible. A value |
| 571 | of 1 means to not swap branches. A value of 0 means to always |
| 572 | insert NOPs. */ |
| 573 | static int mips_optimize = 2; |
| 574 | |
| 575 | /* Debugging level. -g sets this to 2. -gN sets this to N. -g0 is |
| 576 | equivalent to seeing no -g option at all. */ |
| 577 | static int mips_debug = 0; |
| 578 | |
| 579 | /* The maximum number of NOPs needed to avoid the VR4130 mflo/mfhi errata. */ |
| 580 | #define MAX_VR4130_NOPS 4 |
| 581 | |
| 582 | /* The maximum number of NOPs needed to fill delay slots. */ |
| 583 | #define MAX_DELAY_NOPS 2 |
| 584 | |
| 585 | /* The maximum number of NOPs needed for any purpose. */ |
| 586 | #define MAX_NOPS 4 |
| 587 | |
| 588 | /* A list of previous instructions, with index 0 being the most recent. |
| 589 | We need to look back MAX_NOPS instructions when filling delay slots |
| 590 | or working around processor errata. We need to look back one |
| 591 | instruction further if we're thinking about using history[0] to |
| 592 | fill a branch delay slot. */ |
| 593 | static struct mips_cl_insn history[1 + MAX_NOPS]; |
| 594 | |
| 595 | /* Nop instructions used by emit_nop. */ |
| 596 | static struct mips_cl_insn nop_insn, mips16_nop_insn; |
| 597 | |
| 598 | /* The appropriate nop for the current mode. */ |
| 599 | #define NOP_INSN (mips_opts.mips16 ? &mips16_nop_insn : &nop_insn) |
| 600 | |
| 601 | /* If this is set, it points to a frag holding nop instructions which |
| 602 | were inserted before the start of a noreorder section. If those |
| 603 | nops turn out to be unnecessary, the size of the frag can be |
| 604 | decreased. */ |
| 605 | static fragS *prev_nop_frag; |
| 606 | |
| 607 | /* The number of nop instructions we created in prev_nop_frag. */ |
| 608 | static int prev_nop_frag_holds; |
| 609 | |
| 610 | /* The number of nop instructions that we know we need in |
| 611 | prev_nop_frag. */ |
| 612 | static int prev_nop_frag_required; |
| 613 | |
| 614 | /* The number of instructions we've seen since prev_nop_frag. */ |
| 615 | static int prev_nop_frag_since; |
| 616 | |
| 617 | /* For ECOFF and ELF, relocations against symbols are done in two |
| 618 | parts, with a HI relocation and a LO relocation. Each relocation |
| 619 | has only 16 bits of space to store an addend. This means that in |
| 620 | order for the linker to handle carries correctly, it must be able |
| 621 | to locate both the HI and the LO relocation. This means that the |
| 622 | relocations must appear in order in the relocation table. |
| 623 | |
| 624 | In order to implement this, we keep track of each unmatched HI |
| 625 | relocation. We then sort them so that they immediately precede the |
| 626 | corresponding LO relocation. */ |
| 627 | |
| 628 | struct mips_hi_fixup |
| 629 | { |
| 630 | /* Next HI fixup. */ |
| 631 | struct mips_hi_fixup *next; |
| 632 | /* This fixup. */ |
| 633 | fixS *fixp; |
| 634 | /* The section this fixup is in. */ |
| 635 | segT seg; |
| 636 | }; |
| 637 | |
| 638 | /* The list of unmatched HI relocs. */ |
| 639 | |
| 640 | static struct mips_hi_fixup *mips_hi_fixup_list; |
| 641 | |
| 642 | /* The frag containing the last explicit relocation operator. |
| 643 | Null if explicit relocations have not been used. */ |
| 644 | |
| 645 | static fragS *prev_reloc_op_frag; |
| 646 | |
| 647 | /* Map normal MIPS register numbers to mips16 register numbers. */ |
| 648 | |
| 649 | #define X ILLEGAL_REG |
| 650 | static const int mips32_to_16_reg_map[] = |
| 651 | { |
| 652 | X, X, 2, 3, 4, 5, 6, 7, |
| 653 | X, X, X, X, X, X, X, X, |
| 654 | 0, 1, X, X, X, X, X, X, |
| 655 | X, X, X, X, X, X, X, X |
| 656 | }; |
| 657 | #undef X |
| 658 | |
| 659 | /* Map mips16 register numbers to normal MIPS register numbers. */ |
| 660 | |
| 661 | static const unsigned int mips16_to_32_reg_map[] = |
| 662 | { |
| 663 | 16, 17, 2, 3, 4, 5, 6, 7 |
| 664 | }; |
| 665 | |
| 666 | /* Classifies the kind of instructions we're interested in when |
| 667 | implementing -mfix-vr4120. */ |
| 668 | enum fix_vr4120_class { |
| 669 | FIX_VR4120_MACC, |
| 670 | FIX_VR4120_DMACC, |
| 671 | FIX_VR4120_MULT, |
| 672 | FIX_VR4120_DMULT, |
| 673 | FIX_VR4120_DIV, |
| 674 | FIX_VR4120_MTHILO, |
| 675 | NUM_FIX_VR4120_CLASSES |
| 676 | }; |
| 677 | |
| 678 | /* Given two FIX_VR4120_* values X and Y, bit Y of element X is set if |
| 679 | there must be at least one other instruction between an instruction |
| 680 | of type X and an instruction of type Y. */ |
| 681 | static unsigned int vr4120_conflicts[NUM_FIX_VR4120_CLASSES]; |
| 682 | |
| 683 | /* True if -mfix-vr4120 is in force. */ |
| 684 | static int mips_fix_vr4120; |
| 685 | |
| 686 | /* ...likewise -mfix-vr4130. */ |
| 687 | static int mips_fix_vr4130; |
| 688 | |
| 689 | /* We don't relax branches by default, since this causes us to expand |
| 690 | `la .l2 - .l1' if there's a branch between .l1 and .l2, because we |
| 691 | fail to compute the offset before expanding the macro to the most |
| 692 | efficient expansion. */ |
| 693 | |
| 694 | static int mips_relax_branch; |
| 695 | \f |
| 696 | /* The expansion of many macros depends on the type of symbol that |
| 697 | they refer to. For example, when generating position-dependent code, |
| 698 | a macro that refers to a symbol may have two different expansions, |
| 699 | one which uses GP-relative addresses and one which uses absolute |
| 700 | addresses. When generating SVR4-style PIC, a macro may have |
| 701 | different expansions for local and global symbols. |
| 702 | |
| 703 | We handle these situations by generating both sequences and putting |
| 704 | them in variant frags. In position-dependent code, the first sequence |
| 705 | will be the GP-relative one and the second sequence will be the |
| 706 | absolute one. In SVR4 PIC, the first sequence will be for global |
| 707 | symbols and the second will be for local symbols. |
| 708 | |
| 709 | The frag's "subtype" is RELAX_ENCODE (FIRST, SECOND), where FIRST and |
| 710 | SECOND are the lengths of the two sequences in bytes. These fields |
| 711 | can be extracted using RELAX_FIRST() and RELAX_SECOND(). In addition, |
| 712 | the subtype has the following flags: |
| 713 | |
| 714 | RELAX_USE_SECOND |
| 715 | Set if it has been decided that we should use the second |
| 716 | sequence instead of the first. |
| 717 | |
| 718 | RELAX_SECOND_LONGER |
| 719 | Set in the first variant frag if the macro's second implementation |
| 720 | is longer than its first. This refers to the macro as a whole, |
| 721 | not an individual relaxation. |
| 722 | |
| 723 | RELAX_NOMACRO |
| 724 | Set in the first variant frag if the macro appeared in a .set nomacro |
| 725 | block and if one alternative requires a warning but the other does not. |
| 726 | |
| 727 | RELAX_DELAY_SLOT |
| 728 | Like RELAX_NOMACRO, but indicates that the macro appears in a branch |
| 729 | delay slot. |
| 730 | |
| 731 | The frag's "opcode" points to the first fixup for relaxable code. |
| 732 | |
| 733 | Relaxable macros are generated using a sequence such as: |
| 734 | |
| 735 | relax_start (SYMBOL); |
| 736 | ... generate first expansion ... |
| 737 | relax_switch (); |
| 738 | ... generate second expansion ... |
| 739 | relax_end (); |
| 740 | |
| 741 | The code and fixups for the unwanted alternative are discarded |
| 742 | by md_convert_frag. */ |
| 743 | #define RELAX_ENCODE(FIRST, SECOND) (((FIRST) << 8) | (SECOND)) |
| 744 | |
| 745 | #define RELAX_FIRST(X) (((X) >> 8) & 0xff) |
| 746 | #define RELAX_SECOND(X) ((X) & 0xff) |
| 747 | #define RELAX_USE_SECOND 0x10000 |
| 748 | #define RELAX_SECOND_LONGER 0x20000 |
| 749 | #define RELAX_NOMACRO 0x40000 |
| 750 | #define RELAX_DELAY_SLOT 0x80000 |
| 751 | |
| 752 | /* Branch without likely bit. If label is out of range, we turn: |
| 753 | |
| 754 | beq reg1, reg2, label |
| 755 | delay slot |
| 756 | |
| 757 | into |
| 758 | |
| 759 | bne reg1, reg2, 0f |
| 760 | nop |
| 761 | j label |
| 762 | 0: delay slot |
| 763 | |
| 764 | with the following opcode replacements: |
| 765 | |
| 766 | beq <-> bne |
| 767 | blez <-> bgtz |
| 768 | bltz <-> bgez |
| 769 | bc1f <-> bc1t |
| 770 | |
| 771 | bltzal <-> bgezal (with jal label instead of j label) |
| 772 | |
| 773 | Even though keeping the delay slot instruction in the delay slot of |
| 774 | the branch would be more efficient, it would be very tricky to do |
| 775 | correctly, because we'd have to introduce a variable frag *after* |
| 776 | the delay slot instruction, and expand that instead. Let's do it |
| 777 | the easy way for now, even if the branch-not-taken case now costs |
| 778 | one additional instruction. Out-of-range branches are not supposed |
| 779 | to be common, anyway. |
| 780 | |
| 781 | Branch likely. If label is out of range, we turn: |
| 782 | |
| 783 | beql reg1, reg2, label |
| 784 | delay slot (annulled if branch not taken) |
| 785 | |
| 786 | into |
| 787 | |
| 788 | beql reg1, reg2, 1f |
| 789 | nop |
| 790 | beql $0, $0, 2f |
| 791 | nop |
| 792 | 1: j[al] label |
| 793 | delay slot (executed only if branch taken) |
| 794 | 2: |
| 795 | |
| 796 | It would be possible to generate a shorter sequence by losing the |
| 797 | likely bit, generating something like: |
| 798 | |
| 799 | bne reg1, reg2, 0f |
| 800 | nop |
| 801 | j[al] label |
| 802 | delay slot (executed only if branch taken) |
| 803 | 0: |
| 804 | |
| 805 | beql -> bne |
| 806 | bnel -> beq |
| 807 | blezl -> bgtz |
| 808 | bgtzl -> blez |
| 809 | bltzl -> bgez |
| 810 | bgezl -> bltz |
| 811 | bc1fl -> bc1t |
| 812 | bc1tl -> bc1f |
| 813 | |
| 814 | bltzall -> bgezal (with jal label instead of j label) |
| 815 | bgezall -> bltzal (ditto) |
| 816 | |
| 817 | |
| 818 | but it's not clear that it would actually improve performance. */ |
| 819 | #define RELAX_BRANCH_ENCODE(uncond, likely, link, toofar) \ |
| 820 | ((relax_substateT) \ |
| 821 | (0xc0000000 \ |
| 822 | | ((toofar) ? 1 : 0) \ |
| 823 | | ((link) ? 2 : 0) \ |
| 824 | | ((likely) ? 4 : 0) \ |
| 825 | | ((uncond) ? 8 : 0))) |
| 826 | #define RELAX_BRANCH_P(i) (((i) & 0xf0000000) == 0xc0000000) |
| 827 | #define RELAX_BRANCH_UNCOND(i) (((i) & 8) != 0) |
| 828 | #define RELAX_BRANCH_LIKELY(i) (((i) & 4) != 0) |
| 829 | #define RELAX_BRANCH_LINK(i) (((i) & 2) != 0) |
| 830 | #define RELAX_BRANCH_TOOFAR(i) (((i) & 1) != 0) |
| 831 | |
| 832 | /* For mips16 code, we use an entirely different form of relaxation. |
| 833 | mips16 supports two versions of most instructions which take |
| 834 | immediate values: a small one which takes some small value, and a |
| 835 | larger one which takes a 16 bit value. Since branches also follow |
| 836 | this pattern, relaxing these values is required. |
| 837 | |
| 838 | We can assemble both mips16 and normal MIPS code in a single |
| 839 | object. Therefore, we need to support this type of relaxation at |
| 840 | the same time that we support the relaxation described above. We |
| 841 | use the high bit of the subtype field to distinguish these cases. |
| 842 | |
| 843 | The information we store for this type of relaxation is the |
| 844 | argument code found in the opcode file for this relocation, whether |
| 845 | the user explicitly requested a small or extended form, and whether |
| 846 | the relocation is in a jump or jal delay slot. That tells us the |
| 847 | size of the value, and how it should be stored. We also store |
| 848 | whether the fragment is considered to be extended or not. We also |
| 849 | store whether this is known to be a branch to a different section, |
| 850 | whether we have tried to relax this frag yet, and whether we have |
| 851 | ever extended a PC relative fragment because of a shift count. */ |
| 852 | #define RELAX_MIPS16_ENCODE(type, small, ext, dslot, jal_dslot) \ |
| 853 | (0x80000000 \ |
| 854 | | ((type) & 0xff) \ |
| 855 | | ((small) ? 0x100 : 0) \ |
| 856 | | ((ext) ? 0x200 : 0) \ |
| 857 | | ((dslot) ? 0x400 : 0) \ |
| 858 | | ((jal_dslot) ? 0x800 : 0)) |
| 859 | #define RELAX_MIPS16_P(i) (((i) & 0xc0000000) == 0x80000000) |
| 860 | #define RELAX_MIPS16_TYPE(i) ((i) & 0xff) |
| 861 | #define RELAX_MIPS16_USER_SMALL(i) (((i) & 0x100) != 0) |
| 862 | #define RELAX_MIPS16_USER_EXT(i) (((i) & 0x200) != 0) |
| 863 | #define RELAX_MIPS16_DSLOT(i) (((i) & 0x400) != 0) |
| 864 | #define RELAX_MIPS16_JAL_DSLOT(i) (((i) & 0x800) != 0) |
| 865 | #define RELAX_MIPS16_EXTENDED(i) (((i) & 0x1000) != 0) |
| 866 | #define RELAX_MIPS16_MARK_EXTENDED(i) ((i) | 0x1000) |
| 867 | #define RELAX_MIPS16_CLEAR_EXTENDED(i) ((i) &~ 0x1000) |
| 868 | #define RELAX_MIPS16_LONG_BRANCH(i) (((i) & 0x2000) != 0) |
| 869 | #define RELAX_MIPS16_MARK_LONG_BRANCH(i) ((i) | 0x2000) |
| 870 | #define RELAX_MIPS16_CLEAR_LONG_BRANCH(i) ((i) &~ 0x2000) |
| 871 | |
| 872 | /* Is the given value a sign-extended 32-bit value? */ |
| 873 | #define IS_SEXT_32BIT_NUM(x) \ |
| 874 | (((x) &~ (offsetT) 0x7fffffff) == 0 \ |
| 875 | || (((x) &~ (offsetT) 0x7fffffff) == ~ (offsetT) 0x7fffffff)) |
| 876 | |
| 877 | /* Is the given value a sign-extended 16-bit value? */ |
| 878 | #define IS_SEXT_16BIT_NUM(x) \ |
| 879 | (((x) &~ (offsetT) 0x7fff) == 0 \ |
| 880 | || (((x) &~ (offsetT) 0x7fff) == ~ (offsetT) 0x7fff)) |
| 881 | |
| 882 | /* Is the given value a zero-extended 32-bit value? Or a negated one? */ |
| 883 | #define IS_ZEXT_32BIT_NUM(x) \ |
| 884 | (((x) &~ (offsetT) 0xffffffff) == 0 \ |
| 885 | || (((x) &~ (offsetT) 0xffffffff) == ~ (offsetT) 0xffffffff)) |
| 886 | |
| 887 | /* Replace bits MASK << SHIFT of STRUCT with the equivalent bits in |
| 888 | VALUE << SHIFT. VALUE is evaluated exactly once. */ |
| 889 | #define INSERT_BITS(STRUCT, VALUE, MASK, SHIFT) \ |
| 890 | (STRUCT) = (((STRUCT) & ~((MASK) << (SHIFT))) \ |
| 891 | | (((VALUE) & (MASK)) << (SHIFT))) |
| 892 | |
| 893 | /* Extract bits MASK << SHIFT from STRUCT and shift them right |
| 894 | SHIFT places. */ |
| 895 | #define EXTRACT_BITS(STRUCT, MASK, SHIFT) \ |
| 896 | (((STRUCT) >> (SHIFT)) & (MASK)) |
| 897 | |
| 898 | /* Change INSN's opcode so that the operand given by FIELD has value VALUE. |
| 899 | INSN is a mips_cl_insn structure and VALUE is evaluated exactly once. |
| 900 | |
| 901 | include/opcode/mips.h specifies operand fields using the macros |
| 902 | OP_MASK_<FIELD> and OP_SH_<FIELD>. The MIPS16 equivalents start |
| 903 | with "MIPS16OP" instead of "OP". */ |
| 904 | #define INSERT_OPERAND(FIELD, INSN, VALUE) \ |
| 905 | INSERT_BITS ((INSN).insn_opcode, VALUE, OP_MASK_##FIELD, OP_SH_##FIELD) |
| 906 | #define MIPS16_INSERT_OPERAND(FIELD, INSN, VALUE) \ |
| 907 | INSERT_BITS ((INSN).insn_opcode, VALUE, \ |
| 908 | MIPS16OP_MASK_##FIELD, MIPS16OP_SH_##FIELD) |
| 909 | |
| 910 | /* Extract the operand given by FIELD from mips_cl_insn INSN. */ |
| 911 | #define EXTRACT_OPERAND(FIELD, INSN) \ |
| 912 | EXTRACT_BITS ((INSN).insn_opcode, OP_MASK_##FIELD, OP_SH_##FIELD) |
| 913 | #define MIPS16_EXTRACT_OPERAND(FIELD, INSN) \ |
| 914 | EXTRACT_BITS ((INSN).insn_opcode, \ |
| 915 | MIPS16OP_MASK_##FIELD, \ |
| 916 | MIPS16OP_SH_##FIELD) |
| 917 | \f |
| 918 | /* Global variables used when generating relaxable macros. See the |
| 919 | comment above RELAX_ENCODE for more details about how relaxation |
| 920 | is used. */ |
| 921 | static struct { |
| 922 | /* 0 if we're not emitting a relaxable macro. |
| 923 | 1 if we're emitting the first of the two relaxation alternatives. |
| 924 | 2 if we're emitting the second alternative. */ |
| 925 | int sequence; |
| 926 | |
| 927 | /* The first relaxable fixup in the current frag. (In other words, |
| 928 | the first fixup that refers to relaxable code.) */ |
| 929 | fixS *first_fixup; |
| 930 | |
| 931 | /* sizes[0] says how many bytes of the first alternative are stored in |
| 932 | the current frag. Likewise sizes[1] for the second alternative. */ |
| 933 | unsigned int sizes[2]; |
| 934 | |
| 935 | /* The symbol on which the choice of sequence depends. */ |
| 936 | symbolS *symbol; |
| 937 | } mips_relax; |
| 938 | \f |
| 939 | /* Global variables used to decide whether a macro needs a warning. */ |
| 940 | static struct { |
| 941 | /* True if the macro is in a branch delay slot. */ |
| 942 | bfd_boolean delay_slot_p; |
| 943 | |
| 944 | /* For relaxable macros, sizes[0] is the length of the first alternative |
| 945 | in bytes and sizes[1] is the length of the second alternative. |
| 946 | For non-relaxable macros, both elements give the length of the |
| 947 | macro in bytes. */ |
| 948 | unsigned int sizes[2]; |
| 949 | |
| 950 | /* The first variant frag for this macro. */ |
| 951 | fragS *first_frag; |
| 952 | } mips_macro_warning; |
| 953 | \f |
| 954 | /* Prototypes for static functions. */ |
| 955 | |
| 956 | #define internalError() \ |
| 957 | as_fatal (_("internal Error, line %d, %s"), __LINE__, __FILE__) |
| 958 | |
| 959 | enum mips_regclass { MIPS_GR_REG, MIPS_FP_REG, MIPS16_REG }; |
| 960 | |
| 961 | static void append_insn |
| 962 | (struct mips_cl_insn *ip, expressionS *p, bfd_reloc_code_real_type *r); |
| 963 | static void mips_no_prev_insn (void); |
| 964 | static void mips16_macro_build |
| 965 | (expressionS *, const char *, const char *, va_list); |
| 966 | static void load_register (int, expressionS *, int); |
| 967 | static void macro_start (void); |
| 968 | static void macro_end (void); |
| 969 | static void macro (struct mips_cl_insn * ip); |
| 970 | static void mips16_macro (struct mips_cl_insn * ip); |
| 971 | #ifdef LOSING_COMPILER |
| 972 | static void macro2 (struct mips_cl_insn * ip); |
| 973 | #endif |
| 974 | static void mips_ip (char *str, struct mips_cl_insn * ip); |
| 975 | static void mips16_ip (char *str, struct mips_cl_insn * ip); |
| 976 | static void mips16_immed |
| 977 | (char *, unsigned int, int, offsetT, bfd_boolean, bfd_boolean, bfd_boolean, |
| 978 | unsigned long *, bfd_boolean *, unsigned short *); |
| 979 | static size_t my_getSmallExpression |
| 980 | (expressionS *, bfd_reloc_code_real_type *, char *); |
| 981 | static void my_getExpression (expressionS *, char *); |
| 982 | static void s_align (int); |
| 983 | static void s_change_sec (int); |
| 984 | static void s_change_section (int); |
| 985 | static void s_cons (int); |
| 986 | static void s_float_cons (int); |
| 987 | static void s_mips_globl (int); |
| 988 | static void s_option (int); |
| 989 | static void s_mipsset (int); |
| 990 | static void s_abicalls (int); |
| 991 | static void s_cpload (int); |
| 992 | static void s_cpsetup (int); |
| 993 | static void s_cplocal (int); |
| 994 | static void s_cprestore (int); |
| 995 | static void s_cpreturn (int); |
| 996 | static void s_gpvalue (int); |
| 997 | static void s_gpword (int); |
| 998 | static void s_gpdword (int); |
| 999 | static void s_cpadd (int); |
| 1000 | static void s_insn (int); |
| 1001 | static void md_obj_begin (void); |
| 1002 | static void md_obj_end (void); |
| 1003 | static void s_mips_ent (int); |
| 1004 | static void s_mips_end (int); |
| 1005 | static void s_mips_frame (int); |
| 1006 | static void s_mips_mask (int reg_type); |
| 1007 | static void s_mips_stab (int); |
| 1008 | static void s_mips_weakext (int); |
| 1009 | static void s_mips_file (int); |
| 1010 | static void s_mips_loc (int); |
| 1011 | static bfd_boolean pic_need_relax (symbolS *, asection *); |
| 1012 | static int relaxed_branch_length (fragS *, asection *, int); |
| 1013 | static int validate_mips_insn (const struct mips_opcode *); |
| 1014 | |
| 1015 | /* Table and functions used to map between CPU/ISA names, and |
| 1016 | ISA levels, and CPU numbers. */ |
| 1017 | |
| 1018 | struct mips_cpu_info |
| 1019 | { |
| 1020 | const char *name; /* CPU or ISA name. */ |
| 1021 | int is_isa; /* Is this an ISA? (If 0, a CPU.) */ |
| 1022 | int isa; /* ISA level. */ |
| 1023 | int cpu; /* CPU number (default CPU if ISA). */ |
| 1024 | }; |
| 1025 | |
| 1026 | static const struct mips_cpu_info *mips_parse_cpu (const char *, const char *); |
| 1027 | static const struct mips_cpu_info *mips_cpu_info_from_isa (int); |
| 1028 | static const struct mips_cpu_info *mips_cpu_info_from_arch (int); |
| 1029 | \f |
| 1030 | /* Pseudo-op table. |
| 1031 | |
| 1032 | The following pseudo-ops from the Kane and Heinrich MIPS book |
| 1033 | should be defined here, but are currently unsupported: .alias, |
| 1034 | .galive, .gjaldef, .gjrlive, .livereg, .noalias. |
| 1035 | |
| 1036 | The following pseudo-ops from the Kane and Heinrich MIPS book are |
| 1037 | specific to the type of debugging information being generated, and |
| 1038 | should be defined by the object format: .aent, .begin, .bend, |
| 1039 | .bgnb, .end, .endb, .ent, .fmask, .frame, .loc, .mask, .verstamp, |
| 1040 | .vreg. |
| 1041 | |
| 1042 | The following pseudo-ops from the Kane and Heinrich MIPS book are |
| 1043 | not MIPS CPU specific, but are also not specific to the object file |
| 1044 | format. This file is probably the best place to define them, but |
| 1045 | they are not currently supported: .asm0, .endr, .lab, .repeat, |
| 1046 | .struct. */ |
| 1047 | |
| 1048 | static const pseudo_typeS mips_pseudo_table[] = |
| 1049 | { |
| 1050 | /* MIPS specific pseudo-ops. */ |
| 1051 | {"option", s_option, 0}, |
| 1052 | {"set", s_mipsset, 0}, |
| 1053 | {"rdata", s_change_sec, 'r'}, |
| 1054 | {"sdata", s_change_sec, 's'}, |
| 1055 | {"livereg", s_ignore, 0}, |
| 1056 | {"abicalls", s_abicalls, 0}, |
| 1057 | {"cpload", s_cpload, 0}, |
| 1058 | {"cpsetup", s_cpsetup, 0}, |
| 1059 | {"cplocal", s_cplocal, 0}, |
| 1060 | {"cprestore", s_cprestore, 0}, |
| 1061 | {"cpreturn", s_cpreturn, 0}, |
| 1062 | {"gpvalue", s_gpvalue, 0}, |
| 1063 | {"gpword", s_gpword, 0}, |
| 1064 | {"gpdword", s_gpdword, 0}, |
| 1065 | {"cpadd", s_cpadd, 0}, |
| 1066 | {"insn", s_insn, 0}, |
| 1067 | |
| 1068 | /* Relatively generic pseudo-ops that happen to be used on MIPS |
| 1069 | chips. */ |
| 1070 | {"asciiz", stringer, 1}, |
| 1071 | {"bss", s_change_sec, 'b'}, |
| 1072 | {"err", s_err, 0}, |
| 1073 | {"half", s_cons, 1}, |
| 1074 | {"dword", s_cons, 3}, |
| 1075 | {"weakext", s_mips_weakext, 0}, |
| 1076 | |
| 1077 | /* These pseudo-ops are defined in read.c, but must be overridden |
| 1078 | here for one reason or another. */ |
| 1079 | {"align", s_align, 0}, |
| 1080 | {"byte", s_cons, 0}, |
| 1081 | {"data", s_change_sec, 'd'}, |
| 1082 | {"double", s_float_cons, 'd'}, |
| 1083 | {"float", s_float_cons, 'f'}, |
| 1084 | {"globl", s_mips_globl, 0}, |
| 1085 | {"global", s_mips_globl, 0}, |
| 1086 | {"hword", s_cons, 1}, |
| 1087 | {"int", s_cons, 2}, |
| 1088 | {"long", s_cons, 2}, |
| 1089 | {"octa", s_cons, 4}, |
| 1090 | {"quad", s_cons, 3}, |
| 1091 | {"section", s_change_section, 0}, |
| 1092 | {"short", s_cons, 1}, |
| 1093 | {"single", s_float_cons, 'f'}, |
| 1094 | {"stabn", s_mips_stab, 'n'}, |
| 1095 | {"text", s_change_sec, 't'}, |
| 1096 | {"word", s_cons, 2}, |
| 1097 | |
| 1098 | { "extern", ecoff_directive_extern, 0}, |
| 1099 | |
| 1100 | { NULL, NULL, 0 }, |
| 1101 | }; |
| 1102 | |
| 1103 | static const pseudo_typeS mips_nonecoff_pseudo_table[] = |
| 1104 | { |
| 1105 | /* These pseudo-ops should be defined by the object file format. |
| 1106 | However, a.out doesn't support them, so we have versions here. */ |
| 1107 | {"aent", s_mips_ent, 1}, |
| 1108 | {"bgnb", s_ignore, 0}, |
| 1109 | {"end", s_mips_end, 0}, |
| 1110 | {"endb", s_ignore, 0}, |
| 1111 | {"ent", s_mips_ent, 0}, |
| 1112 | {"file", s_mips_file, 0}, |
| 1113 | {"fmask", s_mips_mask, 'F'}, |
| 1114 | {"frame", s_mips_frame, 0}, |
| 1115 | {"loc", s_mips_loc, 0}, |
| 1116 | {"mask", s_mips_mask, 'R'}, |
| 1117 | {"verstamp", s_ignore, 0}, |
| 1118 | { NULL, NULL, 0 }, |
| 1119 | }; |
| 1120 | |
| 1121 | extern void pop_insert (const pseudo_typeS *); |
| 1122 | |
| 1123 | void |
| 1124 | mips_pop_insert (void) |
| 1125 | { |
| 1126 | pop_insert (mips_pseudo_table); |
| 1127 | if (! ECOFF_DEBUGGING) |
| 1128 | pop_insert (mips_nonecoff_pseudo_table); |
| 1129 | } |
| 1130 | \f |
| 1131 | /* Symbols labelling the current insn. */ |
| 1132 | |
| 1133 | struct insn_label_list |
| 1134 | { |
| 1135 | struct insn_label_list *next; |
| 1136 | symbolS *label; |
| 1137 | }; |
| 1138 | |
| 1139 | static struct insn_label_list *insn_labels; |
| 1140 | static struct insn_label_list *free_insn_labels; |
| 1141 | |
| 1142 | static void mips_clear_insn_labels (void); |
| 1143 | |
| 1144 | static inline void |
| 1145 | mips_clear_insn_labels (void) |
| 1146 | { |
| 1147 | register struct insn_label_list **pl; |
| 1148 | |
| 1149 | for (pl = &free_insn_labels; *pl != NULL; pl = &(*pl)->next) |
| 1150 | ; |
| 1151 | *pl = insn_labels; |
| 1152 | insn_labels = NULL; |
| 1153 | } |
| 1154 | \f |
| 1155 | static char *expr_end; |
| 1156 | |
| 1157 | /* Expressions which appear in instructions. These are set by |
| 1158 | mips_ip. */ |
| 1159 | |
| 1160 | static expressionS imm_expr; |
| 1161 | static expressionS imm2_expr; |
| 1162 | static expressionS offset_expr; |
| 1163 | |
| 1164 | /* Relocs associated with imm_expr and offset_expr. */ |
| 1165 | |
| 1166 | static bfd_reloc_code_real_type imm_reloc[3] |
| 1167 | = {BFD_RELOC_UNUSED, BFD_RELOC_UNUSED, BFD_RELOC_UNUSED}; |
| 1168 | static bfd_reloc_code_real_type offset_reloc[3] |
| 1169 | = {BFD_RELOC_UNUSED, BFD_RELOC_UNUSED, BFD_RELOC_UNUSED}; |
| 1170 | |
| 1171 | /* These are set by mips16_ip if an explicit extension is used. */ |
| 1172 | |
| 1173 | static bfd_boolean mips16_small, mips16_ext; |
| 1174 | |
| 1175 | #ifdef OBJ_ELF |
| 1176 | /* The pdr segment for per procedure frame/regmask info. Not used for |
| 1177 | ECOFF debugging. */ |
| 1178 | |
| 1179 | static segT pdr_seg; |
| 1180 | #endif |
| 1181 | |
| 1182 | /* The default target format to use. */ |
| 1183 | |
| 1184 | const char * |
| 1185 | mips_target_format (void) |
| 1186 | { |
| 1187 | switch (OUTPUT_FLAVOR) |
| 1188 | { |
| 1189 | case bfd_target_ecoff_flavour: |
| 1190 | return target_big_endian ? "ecoff-bigmips" : ECOFF_LITTLE_FORMAT; |
| 1191 | case bfd_target_coff_flavour: |
| 1192 | return "pe-mips"; |
| 1193 | case bfd_target_elf_flavour: |
| 1194 | #ifdef TE_VXWORKS |
| 1195 | if (!HAVE_64BIT_OBJECTS && !HAVE_NEWABI) |
| 1196 | return (target_big_endian |
| 1197 | ? "elf32-bigmips-vxworks" |
| 1198 | : "elf32-littlemips-vxworks"); |
| 1199 | #endif |
| 1200 | #ifdef TE_TMIPS |
| 1201 | /* This is traditional mips. */ |
| 1202 | return (target_big_endian |
| 1203 | ? (HAVE_64BIT_OBJECTS |
| 1204 | ? "elf64-tradbigmips" |
| 1205 | : (HAVE_NEWABI |
| 1206 | ? "elf32-ntradbigmips" : "elf32-tradbigmips")) |
| 1207 | : (HAVE_64BIT_OBJECTS |
| 1208 | ? "elf64-tradlittlemips" |
| 1209 | : (HAVE_NEWABI |
| 1210 | ? "elf32-ntradlittlemips" : "elf32-tradlittlemips"))); |
| 1211 | #else |
| 1212 | return (target_big_endian |
| 1213 | ? (HAVE_64BIT_OBJECTS |
| 1214 | ? "elf64-bigmips" |
| 1215 | : (HAVE_NEWABI |
| 1216 | ? "elf32-nbigmips" : "elf32-bigmips")) |
| 1217 | : (HAVE_64BIT_OBJECTS |
| 1218 | ? "elf64-littlemips" |
| 1219 | : (HAVE_NEWABI |
| 1220 | ? "elf32-nlittlemips" : "elf32-littlemips"))); |
| 1221 | #endif |
| 1222 | default: |
| 1223 | abort (); |
| 1224 | return NULL; |
| 1225 | } |
| 1226 | } |
| 1227 | |
| 1228 | /* Return the length of instruction INSN. */ |
| 1229 | |
| 1230 | static inline unsigned int |
| 1231 | insn_length (const struct mips_cl_insn *insn) |
| 1232 | { |
| 1233 | if (!mips_opts.mips16) |
| 1234 | return 4; |
| 1235 | return insn->mips16_absolute_jump_p || insn->use_extend ? 4 : 2; |
| 1236 | } |
| 1237 | |
| 1238 | /* Initialise INSN from opcode entry MO. Leave its position unspecified. */ |
| 1239 | |
| 1240 | static void |
| 1241 | create_insn (struct mips_cl_insn *insn, const struct mips_opcode *mo) |
| 1242 | { |
| 1243 | size_t i; |
| 1244 | |
| 1245 | insn->insn_mo = mo; |
| 1246 | insn->use_extend = FALSE; |
| 1247 | insn->extend = 0; |
| 1248 | insn->insn_opcode = mo->match; |
| 1249 | insn->frag = NULL; |
| 1250 | insn->where = 0; |
| 1251 | for (i = 0; i < ARRAY_SIZE (insn->fixp); i++) |
| 1252 | insn->fixp[i] = NULL; |
| 1253 | insn->fixed_p = (mips_opts.noreorder > 0); |
| 1254 | insn->noreorder_p = (mips_opts.noreorder > 0); |
| 1255 | insn->mips16_absolute_jump_p = 0; |
| 1256 | } |
| 1257 | |
| 1258 | /* Install INSN at the location specified by its "frag" and "where" fields. */ |
| 1259 | |
| 1260 | static void |
| 1261 | install_insn (const struct mips_cl_insn *insn) |
| 1262 | { |
| 1263 | char *f = insn->frag->fr_literal + insn->where; |
| 1264 | if (!mips_opts.mips16) |
| 1265 | md_number_to_chars (f, insn->insn_opcode, 4); |
| 1266 | else if (insn->mips16_absolute_jump_p) |
| 1267 | { |
| 1268 | md_number_to_chars (f, insn->insn_opcode >> 16, 2); |
| 1269 | md_number_to_chars (f + 2, insn->insn_opcode & 0xffff, 2); |
| 1270 | } |
| 1271 | else |
| 1272 | { |
| 1273 | if (insn->use_extend) |
| 1274 | { |
| 1275 | md_number_to_chars (f, 0xf000 | insn->extend, 2); |
| 1276 | f += 2; |
| 1277 | } |
| 1278 | md_number_to_chars (f, insn->insn_opcode, 2); |
| 1279 | } |
| 1280 | } |
| 1281 | |
| 1282 | /* Move INSN to offset WHERE in FRAG. Adjust the fixups accordingly |
| 1283 | and install the opcode in the new location. */ |
| 1284 | |
| 1285 | static void |
| 1286 | move_insn (struct mips_cl_insn *insn, fragS *frag, long where) |
| 1287 | { |
| 1288 | size_t i; |
| 1289 | |
| 1290 | insn->frag = frag; |
| 1291 | insn->where = where; |
| 1292 | for (i = 0; i < ARRAY_SIZE (insn->fixp); i++) |
| 1293 | if (insn->fixp[i] != NULL) |
| 1294 | { |
| 1295 | insn->fixp[i]->fx_frag = frag; |
| 1296 | insn->fixp[i]->fx_where = where; |
| 1297 | } |
| 1298 | install_insn (insn); |
| 1299 | } |
| 1300 | |
| 1301 | /* Add INSN to the end of the output. */ |
| 1302 | |
| 1303 | static void |
| 1304 | add_fixed_insn (struct mips_cl_insn *insn) |
| 1305 | { |
| 1306 | char *f = frag_more (insn_length (insn)); |
| 1307 | move_insn (insn, frag_now, f - frag_now->fr_literal); |
| 1308 | } |
| 1309 | |
| 1310 | /* Start a variant frag and move INSN to the start of the variant part, |
| 1311 | marking it as fixed. The other arguments are as for frag_var. */ |
| 1312 | |
| 1313 | static void |
| 1314 | add_relaxed_insn (struct mips_cl_insn *insn, int max_chars, int var, |
| 1315 | relax_substateT subtype, symbolS *symbol, offsetT offset) |
| 1316 | { |
| 1317 | frag_grow (max_chars); |
| 1318 | move_insn (insn, frag_now, frag_more (0) - frag_now->fr_literal); |
| 1319 | insn->fixed_p = 1; |
| 1320 | frag_var (rs_machine_dependent, max_chars, var, |
| 1321 | subtype, symbol, offset, NULL); |
| 1322 | } |
| 1323 | |
| 1324 | /* Insert N copies of INSN into the history buffer, starting at |
| 1325 | position FIRST. Neither FIRST nor N need to be clipped. */ |
| 1326 | |
| 1327 | static void |
| 1328 | insert_into_history (unsigned int first, unsigned int n, |
| 1329 | const struct mips_cl_insn *insn) |
| 1330 | { |
| 1331 | if (mips_relax.sequence != 2) |
| 1332 | { |
| 1333 | unsigned int i; |
| 1334 | |
| 1335 | for (i = ARRAY_SIZE (history); i-- > first;) |
| 1336 | if (i >= first + n) |
| 1337 | history[i] = history[i - n]; |
| 1338 | else |
| 1339 | history[i] = *insn; |
| 1340 | } |
| 1341 | } |
| 1342 | |
| 1343 | /* Emit a nop instruction, recording it in the history buffer. */ |
| 1344 | |
| 1345 | static void |
| 1346 | emit_nop (void) |
| 1347 | { |
| 1348 | add_fixed_insn (NOP_INSN); |
| 1349 | insert_into_history (0, 1, NOP_INSN); |
| 1350 | } |
| 1351 | |
| 1352 | /* Initialize vr4120_conflicts. There is a bit of duplication here: |
| 1353 | the idea is to make it obvious at a glance that each errata is |
| 1354 | included. */ |
| 1355 | |
| 1356 | static void |
| 1357 | init_vr4120_conflicts (void) |
| 1358 | { |
| 1359 | #define CONFLICT(FIRST, SECOND) \ |
| 1360 | vr4120_conflicts[FIX_VR4120_##FIRST] |= 1 << FIX_VR4120_##SECOND |
| 1361 | |
| 1362 | /* Errata 21 - [D]DIV[U] after [D]MACC */ |
| 1363 | CONFLICT (MACC, DIV); |
| 1364 | CONFLICT (DMACC, DIV); |
| 1365 | |
| 1366 | /* Errata 23 - Continuous DMULT[U]/DMACC instructions. */ |
| 1367 | CONFLICT (DMULT, DMULT); |
| 1368 | CONFLICT (DMULT, DMACC); |
| 1369 | CONFLICT (DMACC, DMULT); |
| 1370 | CONFLICT (DMACC, DMACC); |
| 1371 | |
| 1372 | /* Errata 24 - MT{LO,HI} after [D]MACC */ |
| 1373 | CONFLICT (MACC, MTHILO); |
| 1374 | CONFLICT (DMACC, MTHILO); |
| 1375 | |
| 1376 | /* VR4181A errata MD(1): "If a MULT, MULTU, DMULT or DMULTU |
| 1377 | instruction is executed immediately after a MACC or DMACC |
| 1378 | instruction, the result of [either instruction] is incorrect." */ |
| 1379 | CONFLICT (MACC, MULT); |
| 1380 | CONFLICT (MACC, DMULT); |
| 1381 | CONFLICT (DMACC, MULT); |
| 1382 | CONFLICT (DMACC, DMULT); |
| 1383 | |
| 1384 | /* VR4181A errata MD(4): "If a MACC or DMACC instruction is |
| 1385 | executed immediately after a DMULT, DMULTU, DIV, DIVU, |
| 1386 | DDIV or DDIVU instruction, the result of the MACC or |
| 1387 | DMACC instruction is incorrect.". */ |
| 1388 | CONFLICT (DMULT, MACC); |
| 1389 | CONFLICT (DMULT, DMACC); |
| 1390 | CONFLICT (DIV, MACC); |
| 1391 | CONFLICT (DIV, DMACC); |
| 1392 | |
| 1393 | #undef CONFLICT |
| 1394 | } |
| 1395 | |
| 1396 | /* This function is called once, at assembler startup time. It should |
| 1397 | set up all the tables, etc. that the MD part of the assembler will need. */ |
| 1398 | |
| 1399 | void |
| 1400 | md_begin (void) |
| 1401 | { |
| 1402 | register const char *retval = NULL; |
| 1403 | int i = 0; |
| 1404 | int broken = 0; |
| 1405 | |
| 1406 | if (mips_pic != NO_PIC) |
| 1407 | { |
| 1408 | if (g_switch_seen && g_switch_value != 0) |
| 1409 | as_bad (_("-G may not be used in position-independent code")); |
| 1410 | g_switch_value = 0; |
| 1411 | } |
| 1412 | |
| 1413 | if (! bfd_set_arch_mach (stdoutput, bfd_arch_mips, file_mips_arch)) |
| 1414 | as_warn (_("Could not set architecture and machine")); |
| 1415 | |
| 1416 | op_hash = hash_new (); |
| 1417 | |
| 1418 | for (i = 0; i < NUMOPCODES;) |
| 1419 | { |
| 1420 | const char *name = mips_opcodes[i].name; |
| 1421 | |
| 1422 | retval = hash_insert (op_hash, name, (void *) &mips_opcodes[i]); |
| 1423 | if (retval != NULL) |
| 1424 | { |
| 1425 | fprintf (stderr, _("internal error: can't hash `%s': %s\n"), |
| 1426 | mips_opcodes[i].name, retval); |
| 1427 | /* Probably a memory allocation problem? Give up now. */ |
| 1428 | as_fatal (_("Broken assembler. No assembly attempted.")); |
| 1429 | } |
| 1430 | do |
| 1431 | { |
| 1432 | if (mips_opcodes[i].pinfo != INSN_MACRO) |
| 1433 | { |
| 1434 | if (!validate_mips_insn (&mips_opcodes[i])) |
| 1435 | broken = 1; |
| 1436 | if (nop_insn.insn_mo == NULL && strcmp (name, "nop") == 0) |
| 1437 | { |
| 1438 | create_insn (&nop_insn, mips_opcodes + i); |
| 1439 | nop_insn.fixed_p = 1; |
| 1440 | } |
| 1441 | } |
| 1442 | ++i; |
| 1443 | } |
| 1444 | while ((i < NUMOPCODES) && !strcmp (mips_opcodes[i].name, name)); |
| 1445 | } |
| 1446 | |
| 1447 | mips16_op_hash = hash_new (); |
| 1448 | |
| 1449 | i = 0; |
| 1450 | while (i < bfd_mips16_num_opcodes) |
| 1451 | { |
| 1452 | const char *name = mips16_opcodes[i].name; |
| 1453 | |
| 1454 | retval = hash_insert (mips16_op_hash, name, (void *) &mips16_opcodes[i]); |
| 1455 | if (retval != NULL) |
| 1456 | as_fatal (_("internal: can't hash `%s': %s"), |
| 1457 | mips16_opcodes[i].name, retval); |
| 1458 | do |
| 1459 | { |
| 1460 | if (mips16_opcodes[i].pinfo != INSN_MACRO |
| 1461 | && ((mips16_opcodes[i].match & mips16_opcodes[i].mask) |
| 1462 | != mips16_opcodes[i].match)) |
| 1463 | { |
| 1464 | fprintf (stderr, _("internal error: bad mips16 opcode: %s %s\n"), |
| 1465 | mips16_opcodes[i].name, mips16_opcodes[i].args); |
| 1466 | broken = 1; |
| 1467 | } |
| 1468 | if (mips16_nop_insn.insn_mo == NULL && strcmp (name, "nop") == 0) |
| 1469 | { |
| 1470 | create_insn (&mips16_nop_insn, mips16_opcodes + i); |
| 1471 | mips16_nop_insn.fixed_p = 1; |
| 1472 | } |
| 1473 | ++i; |
| 1474 | } |
| 1475 | while (i < bfd_mips16_num_opcodes |
| 1476 | && strcmp (mips16_opcodes[i].name, name) == 0); |
| 1477 | } |
| 1478 | |
| 1479 | if (broken) |
| 1480 | as_fatal (_("Broken assembler. No assembly attempted.")); |
| 1481 | |
| 1482 | /* We add all the general register names to the symbol table. This |
| 1483 | helps us detect invalid uses of them. */ |
| 1484 | for (i = 0; i < 32; i++) |
| 1485 | { |
| 1486 | char buf[5]; |
| 1487 | |
| 1488 | sprintf (buf, "$%d", i); |
| 1489 | symbol_table_insert (symbol_new (buf, reg_section, i, |
| 1490 | &zero_address_frag)); |
| 1491 | } |
| 1492 | symbol_table_insert (symbol_new ("$ra", reg_section, RA, |
| 1493 | &zero_address_frag)); |
| 1494 | symbol_table_insert (symbol_new ("$fp", reg_section, FP, |
| 1495 | &zero_address_frag)); |
| 1496 | symbol_table_insert (symbol_new ("$sp", reg_section, SP, |
| 1497 | &zero_address_frag)); |
| 1498 | symbol_table_insert (symbol_new ("$gp", reg_section, GP, |
| 1499 | &zero_address_frag)); |
| 1500 | symbol_table_insert (symbol_new ("$at", reg_section, AT, |
| 1501 | &zero_address_frag)); |
| 1502 | symbol_table_insert (symbol_new ("$kt0", reg_section, KT0, |
| 1503 | &zero_address_frag)); |
| 1504 | symbol_table_insert (symbol_new ("$kt1", reg_section, KT1, |
| 1505 | &zero_address_frag)); |
| 1506 | symbol_table_insert (symbol_new ("$zero", reg_section, ZERO, |
| 1507 | &zero_address_frag)); |
| 1508 | symbol_table_insert (symbol_new ("$pc", reg_section, -1, |
| 1509 | &zero_address_frag)); |
| 1510 | |
| 1511 | /* If we don't add these register names to the symbol table, they |
| 1512 | may end up being added as regular symbols by operand(), and then |
| 1513 | make it to the object file as undefined in case they're not |
| 1514 | regarded as local symbols. They're local in o32, since `$' is a |
| 1515 | local symbol prefix, but not in n32 or n64. */ |
| 1516 | for (i = 0; i < 8; i++) |
| 1517 | { |
| 1518 | char buf[6]; |
| 1519 | |
| 1520 | sprintf (buf, "$fcc%i", i); |
| 1521 | symbol_table_insert (symbol_new (buf, reg_section, -1, |
| 1522 | &zero_address_frag)); |
| 1523 | } |
| 1524 | |
| 1525 | mips_no_prev_insn (); |
| 1526 | |
| 1527 | mips_gprmask = 0; |
| 1528 | mips_cprmask[0] = 0; |
| 1529 | mips_cprmask[1] = 0; |
| 1530 | mips_cprmask[2] = 0; |
| 1531 | mips_cprmask[3] = 0; |
| 1532 | |
| 1533 | /* set the default alignment for the text section (2**2) */ |
| 1534 | record_alignment (text_section, 2); |
| 1535 | |
| 1536 | bfd_set_gp_size (stdoutput, g_switch_value); |
| 1537 | |
| 1538 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour) |
| 1539 | { |
| 1540 | /* On a native system other than VxWorks, sections must be aligned |
| 1541 | to 16 byte boundaries. When configured for an embedded ELF |
| 1542 | target, we don't bother. */ |
| 1543 | if (strcmp (TARGET_OS, "elf") != 0 |
| 1544 | && strcmp (TARGET_OS, "vxworks") != 0) |
| 1545 | { |
| 1546 | (void) bfd_set_section_alignment (stdoutput, text_section, 4); |
| 1547 | (void) bfd_set_section_alignment (stdoutput, data_section, 4); |
| 1548 | (void) bfd_set_section_alignment (stdoutput, bss_section, 4); |
| 1549 | } |
| 1550 | |
| 1551 | /* Create a .reginfo section for register masks and a .mdebug |
| 1552 | section for debugging information. */ |
| 1553 | { |
| 1554 | segT seg; |
| 1555 | subsegT subseg; |
| 1556 | flagword flags; |
| 1557 | segT sec; |
| 1558 | |
| 1559 | seg = now_seg; |
| 1560 | subseg = now_subseg; |
| 1561 | |
| 1562 | /* The ABI says this section should be loaded so that the |
| 1563 | running program can access it. However, we don't load it |
| 1564 | if we are configured for an embedded target */ |
| 1565 | flags = SEC_READONLY | SEC_DATA; |
| 1566 | if (strcmp (TARGET_OS, "elf") != 0) |
| 1567 | flags |= SEC_ALLOC | SEC_LOAD; |
| 1568 | |
| 1569 | if (mips_abi != N64_ABI) |
| 1570 | { |
| 1571 | sec = subseg_new (".reginfo", (subsegT) 0); |
| 1572 | |
| 1573 | bfd_set_section_flags (stdoutput, sec, flags); |
| 1574 | bfd_set_section_alignment (stdoutput, sec, HAVE_NEWABI ? 3 : 2); |
| 1575 | |
| 1576 | #ifdef OBJ_ELF |
| 1577 | mips_regmask_frag = frag_more (sizeof (Elf32_External_RegInfo)); |
| 1578 | #endif |
| 1579 | } |
| 1580 | else |
| 1581 | { |
| 1582 | /* The 64-bit ABI uses a .MIPS.options section rather than |
| 1583 | .reginfo section. */ |
| 1584 | sec = subseg_new (".MIPS.options", (subsegT) 0); |
| 1585 | bfd_set_section_flags (stdoutput, sec, flags); |
| 1586 | bfd_set_section_alignment (stdoutput, sec, 3); |
| 1587 | |
| 1588 | #ifdef OBJ_ELF |
| 1589 | /* Set up the option header. */ |
| 1590 | { |
| 1591 | Elf_Internal_Options opthdr; |
| 1592 | char *f; |
| 1593 | |
| 1594 | opthdr.kind = ODK_REGINFO; |
| 1595 | opthdr.size = (sizeof (Elf_External_Options) |
| 1596 | + sizeof (Elf64_External_RegInfo)); |
| 1597 | opthdr.section = 0; |
| 1598 | opthdr.info = 0; |
| 1599 | f = frag_more (sizeof (Elf_External_Options)); |
| 1600 | bfd_mips_elf_swap_options_out (stdoutput, &opthdr, |
| 1601 | (Elf_External_Options *) f); |
| 1602 | |
| 1603 | mips_regmask_frag = frag_more (sizeof (Elf64_External_RegInfo)); |
| 1604 | } |
| 1605 | #endif |
| 1606 | } |
| 1607 | |
| 1608 | if (ECOFF_DEBUGGING) |
| 1609 | { |
| 1610 | sec = subseg_new (".mdebug", (subsegT) 0); |
| 1611 | (void) bfd_set_section_flags (stdoutput, sec, |
| 1612 | SEC_HAS_CONTENTS | SEC_READONLY); |
| 1613 | (void) bfd_set_section_alignment (stdoutput, sec, 2); |
| 1614 | } |
| 1615 | #ifdef OBJ_ELF |
| 1616 | else if (OUTPUT_FLAVOR == bfd_target_elf_flavour && mips_flag_pdr) |
| 1617 | { |
| 1618 | pdr_seg = subseg_new (".pdr", (subsegT) 0); |
| 1619 | (void) bfd_set_section_flags (stdoutput, pdr_seg, |
| 1620 | SEC_READONLY | SEC_RELOC |
| 1621 | | SEC_DEBUGGING); |
| 1622 | (void) bfd_set_section_alignment (stdoutput, pdr_seg, 2); |
| 1623 | } |
| 1624 | #endif |
| 1625 | |
| 1626 | subseg_set (seg, subseg); |
| 1627 | } |
| 1628 | } |
| 1629 | |
| 1630 | if (! ECOFF_DEBUGGING) |
| 1631 | md_obj_begin (); |
| 1632 | |
| 1633 | if (mips_fix_vr4120) |
| 1634 | init_vr4120_conflicts (); |
| 1635 | } |
| 1636 | |
| 1637 | void |
| 1638 | md_mips_end (void) |
| 1639 | { |
| 1640 | if (! ECOFF_DEBUGGING) |
| 1641 | md_obj_end (); |
| 1642 | } |
| 1643 | |
| 1644 | void |
| 1645 | md_assemble (char *str) |
| 1646 | { |
| 1647 | struct mips_cl_insn insn; |
| 1648 | bfd_reloc_code_real_type unused_reloc[3] |
| 1649 | = {BFD_RELOC_UNUSED, BFD_RELOC_UNUSED, BFD_RELOC_UNUSED}; |
| 1650 | |
| 1651 | imm_expr.X_op = O_absent; |
| 1652 | imm2_expr.X_op = O_absent; |
| 1653 | offset_expr.X_op = O_absent; |
| 1654 | imm_reloc[0] = BFD_RELOC_UNUSED; |
| 1655 | imm_reloc[1] = BFD_RELOC_UNUSED; |
| 1656 | imm_reloc[2] = BFD_RELOC_UNUSED; |
| 1657 | offset_reloc[0] = BFD_RELOC_UNUSED; |
| 1658 | offset_reloc[1] = BFD_RELOC_UNUSED; |
| 1659 | offset_reloc[2] = BFD_RELOC_UNUSED; |
| 1660 | |
| 1661 | if (mips_opts.mips16) |
| 1662 | mips16_ip (str, &insn); |
| 1663 | else |
| 1664 | { |
| 1665 | mips_ip (str, &insn); |
| 1666 | DBG ((_("returned from mips_ip(%s) insn_opcode = 0x%x\n"), |
| 1667 | str, insn.insn_opcode)); |
| 1668 | } |
| 1669 | |
| 1670 | if (insn_error) |
| 1671 | { |
| 1672 | as_bad ("%s `%s'", insn_error, str); |
| 1673 | return; |
| 1674 | } |
| 1675 | |
| 1676 | if (insn.insn_mo->pinfo == INSN_MACRO) |
| 1677 | { |
| 1678 | macro_start (); |
| 1679 | if (mips_opts.mips16) |
| 1680 | mips16_macro (&insn); |
| 1681 | else |
| 1682 | macro (&insn); |
| 1683 | macro_end (); |
| 1684 | } |
| 1685 | else |
| 1686 | { |
| 1687 | if (imm_expr.X_op != O_absent) |
| 1688 | append_insn (&insn, &imm_expr, imm_reloc); |
| 1689 | else if (offset_expr.X_op != O_absent) |
| 1690 | append_insn (&insn, &offset_expr, offset_reloc); |
| 1691 | else |
| 1692 | append_insn (&insn, NULL, unused_reloc); |
| 1693 | } |
| 1694 | } |
| 1695 | |
| 1696 | /* Return true if the given relocation might need a matching %lo(). |
| 1697 | This is only "might" because SVR4 R_MIPS_GOT16 relocations only |
| 1698 | need a matching %lo() when applied to local symbols. */ |
| 1699 | |
| 1700 | static inline bfd_boolean |
| 1701 | reloc_needs_lo_p (bfd_reloc_code_real_type reloc) |
| 1702 | { |
| 1703 | return (HAVE_IN_PLACE_ADDENDS |
| 1704 | && (reloc == BFD_RELOC_HI16_S |
| 1705 | || reloc == BFD_RELOC_MIPS16_HI16_S |
| 1706 | /* VxWorks R_MIPS_GOT16 relocs never need a matching %lo(); |
| 1707 | all GOT16 relocations evaluate to "G". */ |
| 1708 | || (reloc == BFD_RELOC_MIPS_GOT16 && mips_pic != VXWORKS_PIC))); |
| 1709 | } |
| 1710 | |
| 1711 | /* Return true if the given fixup is followed by a matching R_MIPS_LO16 |
| 1712 | relocation. */ |
| 1713 | |
| 1714 | static inline bfd_boolean |
| 1715 | fixup_has_matching_lo_p (fixS *fixp) |
| 1716 | { |
| 1717 | return (fixp->fx_next != NULL |
| 1718 | && (fixp->fx_next->fx_r_type == BFD_RELOC_LO16 |
| 1719 | || fixp->fx_next->fx_r_type == BFD_RELOC_MIPS16_LO16) |
| 1720 | && fixp->fx_addsy == fixp->fx_next->fx_addsy |
| 1721 | && fixp->fx_offset == fixp->fx_next->fx_offset); |
| 1722 | } |
| 1723 | |
| 1724 | /* See whether instruction IP reads register REG. CLASS is the type |
| 1725 | of register. */ |
| 1726 | |
| 1727 | static int |
| 1728 | insn_uses_reg (const struct mips_cl_insn *ip, unsigned int reg, |
| 1729 | enum mips_regclass class) |
| 1730 | { |
| 1731 | if (class == MIPS16_REG) |
| 1732 | { |
| 1733 | assert (mips_opts.mips16); |
| 1734 | reg = mips16_to_32_reg_map[reg]; |
| 1735 | class = MIPS_GR_REG; |
| 1736 | } |
| 1737 | |
| 1738 | /* Don't report on general register ZERO, since it never changes. */ |
| 1739 | if (class == MIPS_GR_REG && reg == ZERO) |
| 1740 | return 0; |
| 1741 | |
| 1742 | if (class == MIPS_FP_REG) |
| 1743 | { |
| 1744 | assert (! mips_opts.mips16); |
| 1745 | /* If we are called with either $f0 or $f1, we must check $f0. |
| 1746 | This is not optimal, because it will introduce an unnecessary |
| 1747 | NOP between "lwc1 $f0" and "swc1 $f1". To fix this we would |
| 1748 | need to distinguish reading both $f0 and $f1 or just one of |
| 1749 | them. Note that we don't have to check the other way, |
| 1750 | because there is no instruction that sets both $f0 and $f1 |
| 1751 | and requires a delay. */ |
| 1752 | if ((ip->insn_mo->pinfo & INSN_READ_FPR_S) |
| 1753 | && ((EXTRACT_OPERAND (FS, *ip) & ~(unsigned) 1) |
| 1754 | == (reg &~ (unsigned) 1))) |
| 1755 | return 1; |
| 1756 | if ((ip->insn_mo->pinfo & INSN_READ_FPR_T) |
| 1757 | && ((EXTRACT_OPERAND (FT, *ip) & ~(unsigned) 1) |
| 1758 | == (reg &~ (unsigned) 1))) |
| 1759 | return 1; |
| 1760 | } |
| 1761 | else if (! mips_opts.mips16) |
| 1762 | { |
| 1763 | if ((ip->insn_mo->pinfo & INSN_READ_GPR_S) |
| 1764 | && EXTRACT_OPERAND (RS, *ip) == reg) |
| 1765 | return 1; |
| 1766 | if ((ip->insn_mo->pinfo & INSN_READ_GPR_T) |
| 1767 | && EXTRACT_OPERAND (RT, *ip) == reg) |
| 1768 | return 1; |
| 1769 | } |
| 1770 | else |
| 1771 | { |
| 1772 | if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_X) |
| 1773 | && mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (RX, *ip)] == reg) |
| 1774 | return 1; |
| 1775 | if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_Y) |
| 1776 | && mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (RY, *ip)] == reg) |
| 1777 | return 1; |
| 1778 | if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_Z) |
| 1779 | && (mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (MOVE32Z, *ip)] |
| 1780 | == reg)) |
| 1781 | return 1; |
| 1782 | if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_T) && reg == TREG) |
| 1783 | return 1; |
| 1784 | if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_SP) && reg == SP) |
| 1785 | return 1; |
| 1786 | if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_31) && reg == RA) |
| 1787 | return 1; |
| 1788 | if ((ip->insn_mo->pinfo & MIPS16_INSN_READ_GPR_X) |
| 1789 | && MIPS16_EXTRACT_OPERAND (REGR32, *ip) == reg) |
| 1790 | return 1; |
| 1791 | } |
| 1792 | |
| 1793 | return 0; |
| 1794 | } |
| 1795 | |
| 1796 | /* This function returns true if modifying a register requires a |
| 1797 | delay. */ |
| 1798 | |
| 1799 | static int |
| 1800 | reg_needs_delay (unsigned int reg) |
| 1801 | { |
| 1802 | unsigned long prev_pinfo; |
| 1803 | |
| 1804 | prev_pinfo = history[0].insn_mo->pinfo; |
| 1805 | if (! mips_opts.noreorder |
| 1806 | && (((prev_pinfo & INSN_LOAD_MEMORY_DELAY) |
| 1807 | && ! gpr_interlocks) |
| 1808 | || ((prev_pinfo & INSN_LOAD_COPROC_DELAY) |
| 1809 | && ! cop_interlocks))) |
| 1810 | { |
| 1811 | /* A load from a coprocessor or from memory. All load delays |
| 1812 | delay the use of general register rt for one instruction. */ |
| 1813 | /* Itbl support may require additional care here. */ |
| 1814 | know (prev_pinfo & INSN_WRITE_GPR_T); |
| 1815 | if (reg == EXTRACT_OPERAND (RT, history[0])) |
| 1816 | return 1; |
| 1817 | } |
| 1818 | |
| 1819 | return 0; |
| 1820 | } |
| 1821 | |
| 1822 | /* Move all labels in insn_labels to the current insertion point. */ |
| 1823 | |
| 1824 | static void |
| 1825 | mips_move_labels (void) |
| 1826 | { |
| 1827 | struct insn_label_list *l; |
| 1828 | valueT val; |
| 1829 | |
| 1830 | for (l = insn_labels; l != NULL; l = l->next) |
| 1831 | { |
| 1832 | assert (S_GET_SEGMENT (l->label) == now_seg); |
| 1833 | symbol_set_frag (l->label, frag_now); |
| 1834 | val = (valueT) frag_now_fix (); |
| 1835 | /* mips16 text labels are stored as odd. */ |
| 1836 | if (mips_opts.mips16) |
| 1837 | ++val; |
| 1838 | S_SET_VALUE (l->label, val); |
| 1839 | } |
| 1840 | } |
| 1841 | |
| 1842 | /* Mark instruction labels in mips16 mode. This permits the linker to |
| 1843 | handle them specially, such as generating jalx instructions when |
| 1844 | needed. We also make them odd for the duration of the assembly, in |
| 1845 | order to generate the right sort of code. We will make them even |
| 1846 | in the adjust_symtab routine, while leaving them marked. This is |
| 1847 | convenient for the debugger and the disassembler. The linker knows |
| 1848 | to make them odd again. */ |
| 1849 | |
| 1850 | static void |
| 1851 | mips16_mark_labels (void) |
| 1852 | { |
| 1853 | if (mips_opts.mips16) |
| 1854 | { |
| 1855 | struct insn_label_list *l; |
| 1856 | valueT val; |
| 1857 | |
| 1858 | for (l = insn_labels; l != NULL; l = l->next) |
| 1859 | { |
| 1860 | #ifdef OBJ_ELF |
| 1861 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour) |
| 1862 | S_SET_OTHER (l->label, STO_MIPS16); |
| 1863 | #endif |
| 1864 | val = S_GET_VALUE (l->label); |
| 1865 | if ((val & 1) == 0) |
| 1866 | S_SET_VALUE (l->label, val + 1); |
| 1867 | } |
| 1868 | } |
| 1869 | } |
| 1870 | |
| 1871 | /* End the current frag. Make it a variant frag and record the |
| 1872 | relaxation info. */ |
| 1873 | |
| 1874 | static void |
| 1875 | relax_close_frag (void) |
| 1876 | { |
| 1877 | mips_macro_warning.first_frag = frag_now; |
| 1878 | frag_var (rs_machine_dependent, 0, 0, |
| 1879 | RELAX_ENCODE (mips_relax.sizes[0], mips_relax.sizes[1]), |
| 1880 | mips_relax.symbol, 0, (char *) mips_relax.first_fixup); |
| 1881 | |
| 1882 | memset (&mips_relax.sizes, 0, sizeof (mips_relax.sizes)); |
| 1883 | mips_relax.first_fixup = 0; |
| 1884 | } |
| 1885 | |
| 1886 | /* Start a new relaxation sequence whose expansion depends on SYMBOL. |
| 1887 | See the comment above RELAX_ENCODE for more details. */ |
| 1888 | |
| 1889 | static void |
| 1890 | relax_start (symbolS *symbol) |
| 1891 | { |
| 1892 | assert (mips_relax.sequence == 0); |
| 1893 | mips_relax.sequence = 1; |
| 1894 | mips_relax.symbol = symbol; |
| 1895 | } |
| 1896 | |
| 1897 | /* Start generating the second version of a relaxable sequence. |
| 1898 | See the comment above RELAX_ENCODE for more details. */ |
| 1899 | |
| 1900 | static void |
| 1901 | relax_switch (void) |
| 1902 | { |
| 1903 | assert (mips_relax.sequence == 1); |
| 1904 | mips_relax.sequence = 2; |
| 1905 | } |
| 1906 | |
| 1907 | /* End the current relaxable sequence. */ |
| 1908 | |
| 1909 | static void |
| 1910 | relax_end (void) |
| 1911 | { |
| 1912 | assert (mips_relax.sequence == 2); |
| 1913 | relax_close_frag (); |
| 1914 | mips_relax.sequence = 0; |
| 1915 | } |
| 1916 | |
| 1917 | /* Classify an instruction according to the FIX_VR4120_* enumeration. |
| 1918 | Return NUM_FIX_VR4120_CLASSES if the instruction isn't affected |
| 1919 | by VR4120 errata. */ |
| 1920 | |
| 1921 | static unsigned int |
| 1922 | classify_vr4120_insn (const char *name) |
| 1923 | { |
| 1924 | if (strncmp (name, "macc", 4) == 0) |
| 1925 | return FIX_VR4120_MACC; |
| 1926 | if (strncmp (name, "dmacc", 5) == 0) |
| 1927 | return FIX_VR4120_DMACC; |
| 1928 | if (strncmp (name, "mult", 4) == 0) |
| 1929 | return FIX_VR4120_MULT; |
| 1930 | if (strncmp (name, "dmult", 5) == 0) |
| 1931 | return FIX_VR4120_DMULT; |
| 1932 | if (strstr (name, "div")) |
| 1933 | return FIX_VR4120_DIV; |
| 1934 | if (strcmp (name, "mtlo") == 0 || strcmp (name, "mthi") == 0) |
| 1935 | return FIX_VR4120_MTHILO; |
| 1936 | return NUM_FIX_VR4120_CLASSES; |
| 1937 | } |
| 1938 | |
| 1939 | /* Return the number of instructions that must separate INSN1 and INSN2, |
| 1940 | where INSN1 is the earlier instruction. Return the worst-case value |
| 1941 | for any INSN2 if INSN2 is null. */ |
| 1942 | |
| 1943 | static unsigned int |
| 1944 | insns_between (const struct mips_cl_insn *insn1, |
| 1945 | const struct mips_cl_insn *insn2) |
| 1946 | { |
| 1947 | unsigned long pinfo1, pinfo2; |
| 1948 | |
| 1949 | /* This function needs to know which pinfo flags are set for INSN2 |
| 1950 | and which registers INSN2 uses. The former is stored in PINFO2 and |
| 1951 | the latter is tested via INSN2_USES_REG. If INSN2 is null, PINFO2 |
| 1952 | will have every flag set and INSN2_USES_REG will always return true. */ |
| 1953 | pinfo1 = insn1->insn_mo->pinfo; |
| 1954 | pinfo2 = insn2 ? insn2->insn_mo->pinfo : ~0U; |
| 1955 | |
| 1956 | #define INSN2_USES_REG(REG, CLASS) \ |
| 1957 | (insn2 == NULL || insn_uses_reg (insn2, REG, CLASS)) |
| 1958 | |
| 1959 | /* For most targets, write-after-read dependencies on the HI and LO |
| 1960 | registers must be separated by at least two instructions. */ |
| 1961 | if (!hilo_interlocks) |
| 1962 | { |
| 1963 | if ((pinfo1 & INSN_READ_LO) && (pinfo2 & INSN_WRITE_LO)) |
| 1964 | return 2; |
| 1965 | if ((pinfo1 & INSN_READ_HI) && (pinfo2 & INSN_WRITE_HI)) |
| 1966 | return 2; |
| 1967 | } |
| 1968 | |
| 1969 | /* If we're working around r7000 errata, there must be two instructions |
| 1970 | between an mfhi or mflo and any instruction that uses the result. */ |
| 1971 | if (mips_7000_hilo_fix |
| 1972 | && MF_HILO_INSN (pinfo1) |
| 1973 | && INSN2_USES_REG (EXTRACT_OPERAND (RD, *insn1), MIPS_GR_REG)) |
| 1974 | return 2; |
| 1975 | |
| 1976 | /* If working around VR4120 errata, check for combinations that need |
| 1977 | a single intervening instruction. */ |
| 1978 | if (mips_fix_vr4120) |
| 1979 | { |
| 1980 | unsigned int class1, class2; |
| 1981 | |
| 1982 | class1 = classify_vr4120_insn (insn1->insn_mo->name); |
| 1983 | if (class1 != NUM_FIX_VR4120_CLASSES && vr4120_conflicts[class1] != 0) |
| 1984 | { |
| 1985 | if (insn2 == NULL) |
| 1986 | return 1; |
| 1987 | class2 = classify_vr4120_insn (insn2->insn_mo->name); |
| 1988 | if (vr4120_conflicts[class1] & (1 << class2)) |
| 1989 | return 1; |
| 1990 | } |
| 1991 | } |
| 1992 | |
| 1993 | if (!mips_opts.mips16) |
| 1994 | { |
| 1995 | /* Check for GPR or coprocessor load delays. All such delays |
| 1996 | are on the RT register. */ |
| 1997 | /* Itbl support may require additional care here. */ |
| 1998 | if ((!gpr_interlocks && (pinfo1 & INSN_LOAD_MEMORY_DELAY)) |
| 1999 | || (!cop_interlocks && (pinfo1 & INSN_LOAD_COPROC_DELAY))) |
| 2000 | { |
| 2001 | know (pinfo1 & INSN_WRITE_GPR_T); |
| 2002 | if (INSN2_USES_REG (EXTRACT_OPERAND (RT, *insn1), MIPS_GR_REG)) |
| 2003 | return 1; |
| 2004 | } |
| 2005 | |
| 2006 | /* Check for generic coprocessor hazards. |
| 2007 | |
| 2008 | This case is not handled very well. There is no special |
| 2009 | knowledge of CP0 handling, and the coprocessors other than |
| 2010 | the floating point unit are not distinguished at all. */ |
| 2011 | /* Itbl support may require additional care here. FIXME! |
| 2012 | Need to modify this to include knowledge about |
| 2013 | user specified delays! */ |
| 2014 | else if ((!cop_interlocks && (pinfo1 & INSN_COPROC_MOVE_DELAY)) |
| 2015 | || (!cop_mem_interlocks && (pinfo1 & INSN_COPROC_MEMORY_DELAY))) |
| 2016 | { |
| 2017 | /* Handle cases where INSN1 writes to a known general coprocessor |
| 2018 | register. There must be a one instruction delay before INSN2 |
| 2019 | if INSN2 reads that register, otherwise no delay is needed. */ |
| 2020 | if (pinfo1 & INSN_WRITE_FPR_T) |
| 2021 | { |
| 2022 | if (INSN2_USES_REG (EXTRACT_OPERAND (FT, *insn1), MIPS_FP_REG)) |
| 2023 | return 1; |
| 2024 | } |
| 2025 | else if (pinfo1 & INSN_WRITE_FPR_S) |
| 2026 | { |
| 2027 | if (INSN2_USES_REG (EXTRACT_OPERAND (FS, *insn1), MIPS_FP_REG)) |
| 2028 | return 1; |
| 2029 | } |
| 2030 | else |
| 2031 | { |
| 2032 | /* Read-after-write dependencies on the control registers |
| 2033 | require a two-instruction gap. */ |
| 2034 | if ((pinfo1 & INSN_WRITE_COND_CODE) |
| 2035 | && (pinfo2 & INSN_READ_COND_CODE)) |
| 2036 | return 2; |
| 2037 | |
| 2038 | /* We don't know exactly what INSN1 does. If INSN2 is |
| 2039 | also a coprocessor instruction, assume there must be |
| 2040 | a one instruction gap. */ |
| 2041 | if (pinfo2 & INSN_COP) |
| 2042 | return 1; |
| 2043 | } |
| 2044 | } |
| 2045 | |
| 2046 | /* Check for read-after-write dependencies on the coprocessor |
| 2047 | control registers in cases where INSN1 does not need a general |
| 2048 | coprocessor delay. This means that INSN1 is a floating point |
| 2049 | comparison instruction. */ |
| 2050 | /* Itbl support may require additional care here. */ |
| 2051 | else if (!cop_interlocks |
| 2052 | && (pinfo1 & INSN_WRITE_COND_CODE) |
| 2053 | && (pinfo2 & INSN_READ_COND_CODE)) |
| 2054 | return 1; |
| 2055 | } |
| 2056 | |
| 2057 | #undef INSN2_USES_REG |
| 2058 | |
| 2059 | return 0; |
| 2060 | } |
| 2061 | |
| 2062 | /* Return the number of nops that would be needed to work around the |
| 2063 | VR4130 mflo/mfhi errata if instruction INSN immediately followed |
| 2064 | the MAX_VR4130_NOPS instructions described by HISTORY. */ |
| 2065 | |
| 2066 | static int |
| 2067 | nops_for_vr4130 (const struct mips_cl_insn *history, |
| 2068 | const struct mips_cl_insn *insn) |
| 2069 | { |
| 2070 | int i, j, reg; |
| 2071 | |
| 2072 | /* Check if the instruction writes to HI or LO. MTHI and MTLO |
| 2073 | are not affected by the errata. */ |
| 2074 | if (insn != 0 |
| 2075 | && ((insn->insn_mo->pinfo & (INSN_WRITE_HI | INSN_WRITE_LO)) == 0 |
| 2076 | || strcmp (insn->insn_mo->name, "mtlo") == 0 |
| 2077 | || strcmp (insn->insn_mo->name, "mthi") == 0)) |
| 2078 | return 0; |
| 2079 | |
| 2080 | /* Search for the first MFLO or MFHI. */ |
| 2081 | for (i = 0; i < MAX_VR4130_NOPS; i++) |
| 2082 | if (!history[i].noreorder_p && MF_HILO_INSN (history[i].insn_mo->pinfo)) |
| 2083 | { |
| 2084 | /* Extract the destination register. */ |
| 2085 | if (mips_opts.mips16) |
| 2086 | reg = mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (RX, history[i])]; |
| 2087 | else |
| 2088 | reg = EXTRACT_OPERAND (RD, history[i]); |
| 2089 | |
| 2090 | /* No nops are needed if INSN reads that register. */ |
| 2091 | if (insn != NULL && insn_uses_reg (insn, reg, MIPS_GR_REG)) |
| 2092 | return 0; |
| 2093 | |
| 2094 | /* ...or if any of the intervening instructions do. */ |
| 2095 | for (j = 0; j < i; j++) |
| 2096 | if (insn_uses_reg (&history[j], reg, MIPS_GR_REG)) |
| 2097 | return 0; |
| 2098 | |
| 2099 | return MAX_VR4130_NOPS - i; |
| 2100 | } |
| 2101 | return 0; |
| 2102 | } |
| 2103 | |
| 2104 | /* Return the number of nops that would be needed if instruction INSN |
| 2105 | immediately followed the MAX_NOPS instructions given by HISTORY, |
| 2106 | where HISTORY[0] is the most recent instruction. If INSN is null, |
| 2107 | return the worse-case number of nops for any instruction. */ |
| 2108 | |
| 2109 | static int |
| 2110 | nops_for_insn (const struct mips_cl_insn *history, |
| 2111 | const struct mips_cl_insn *insn) |
| 2112 | { |
| 2113 | int i, nops, tmp_nops; |
| 2114 | |
| 2115 | nops = 0; |
| 2116 | for (i = 0; i < MAX_DELAY_NOPS; i++) |
| 2117 | if (!history[i].noreorder_p) |
| 2118 | { |
| 2119 | tmp_nops = insns_between (history + i, insn) - i; |
| 2120 | if (tmp_nops > nops) |
| 2121 | nops = tmp_nops; |
| 2122 | } |
| 2123 | |
| 2124 | if (mips_fix_vr4130) |
| 2125 | { |
| 2126 | tmp_nops = nops_for_vr4130 (history, insn); |
| 2127 | if (tmp_nops > nops) |
| 2128 | nops = tmp_nops; |
| 2129 | } |
| 2130 | |
| 2131 | return nops; |
| 2132 | } |
| 2133 | |
| 2134 | /* The variable arguments provide NUM_INSNS extra instructions that |
| 2135 | might be added to HISTORY. Return the largest number of nops that |
| 2136 | would be needed after the extended sequence. */ |
| 2137 | |
| 2138 | static int |
| 2139 | nops_for_sequence (int num_insns, const struct mips_cl_insn *history, ...) |
| 2140 | { |
| 2141 | va_list args; |
| 2142 | struct mips_cl_insn buffer[MAX_NOPS]; |
| 2143 | struct mips_cl_insn *cursor; |
| 2144 | int nops; |
| 2145 | |
| 2146 | va_start (args, history); |
| 2147 | cursor = buffer + num_insns; |
| 2148 | memcpy (cursor, history, (MAX_NOPS - num_insns) * sizeof (*cursor)); |
| 2149 | while (cursor > buffer) |
| 2150 | *--cursor = *va_arg (args, const struct mips_cl_insn *); |
| 2151 | |
| 2152 | nops = nops_for_insn (buffer, NULL); |
| 2153 | va_end (args); |
| 2154 | return nops; |
| 2155 | } |
| 2156 | |
| 2157 | /* Like nops_for_insn, but if INSN is a branch, take into account the |
| 2158 | worst-case delay for the branch target. */ |
| 2159 | |
| 2160 | static int |
| 2161 | nops_for_insn_or_target (const struct mips_cl_insn *history, |
| 2162 | const struct mips_cl_insn *insn) |
| 2163 | { |
| 2164 | int nops, tmp_nops; |
| 2165 | |
| 2166 | nops = nops_for_insn (history, insn); |
| 2167 | if (insn->insn_mo->pinfo & (INSN_UNCOND_BRANCH_DELAY |
| 2168 | | INSN_COND_BRANCH_DELAY |
| 2169 | | INSN_COND_BRANCH_LIKELY)) |
| 2170 | { |
| 2171 | tmp_nops = nops_for_sequence (2, history, insn, NOP_INSN); |
| 2172 | if (tmp_nops > nops) |
| 2173 | nops = tmp_nops; |
| 2174 | } |
| 2175 | else if (mips_opts.mips16 && (insn->insn_mo->pinfo & MIPS16_INSN_BRANCH)) |
| 2176 | { |
| 2177 | tmp_nops = nops_for_sequence (1, history, insn); |
| 2178 | if (tmp_nops > nops) |
| 2179 | nops = tmp_nops; |
| 2180 | } |
| 2181 | return nops; |
| 2182 | } |
| 2183 | |
| 2184 | /* Output an instruction. IP is the instruction information. |
| 2185 | ADDRESS_EXPR is an operand of the instruction to be used with |
| 2186 | RELOC_TYPE. */ |
| 2187 | |
| 2188 | static void |
| 2189 | append_insn (struct mips_cl_insn *ip, expressionS *address_expr, |
| 2190 | bfd_reloc_code_real_type *reloc_type) |
| 2191 | { |
| 2192 | register unsigned long prev_pinfo, pinfo; |
| 2193 | relax_stateT prev_insn_frag_type = 0; |
| 2194 | bfd_boolean relaxed_branch = FALSE; |
| 2195 | |
| 2196 | /* Mark instruction labels in mips16 mode. */ |
| 2197 | mips16_mark_labels (); |
| 2198 | |
| 2199 | prev_pinfo = history[0].insn_mo->pinfo; |
| 2200 | pinfo = ip->insn_mo->pinfo; |
| 2201 | |
| 2202 | if (mips_relax.sequence != 2 && !mips_opts.noreorder) |
| 2203 | { |
| 2204 | /* There are a lot of optimizations we could do that we don't. |
| 2205 | In particular, we do not, in general, reorder instructions. |
| 2206 | If you use gcc with optimization, it will reorder |
| 2207 | instructions and generally do much more optimization then we |
| 2208 | do here; repeating all that work in the assembler would only |
| 2209 | benefit hand written assembly code, and does not seem worth |
| 2210 | it. */ |
| 2211 | int nops = (mips_optimize == 0 |
| 2212 | ? nops_for_insn (history, NULL) |
| 2213 | : nops_for_insn_or_target (history, ip)); |
| 2214 | if (nops > 0) |
| 2215 | { |
| 2216 | fragS *old_frag; |
| 2217 | unsigned long old_frag_offset; |
| 2218 | int i; |
| 2219 | |
| 2220 | old_frag = frag_now; |
| 2221 | old_frag_offset = frag_now_fix (); |
| 2222 | |
| 2223 | for (i = 0; i < nops; i++) |
| 2224 | emit_nop (); |
| 2225 | |
| 2226 | if (listing) |
| 2227 | { |
| 2228 | listing_prev_line (); |
| 2229 | /* We may be at the start of a variant frag. In case we |
| 2230 | are, make sure there is enough space for the frag |
| 2231 | after the frags created by listing_prev_line. The |
| 2232 | argument to frag_grow here must be at least as large |
| 2233 | as the argument to all other calls to frag_grow in |
| 2234 | this file. We don't have to worry about being in the |
| 2235 | middle of a variant frag, because the variants insert |
| 2236 | all needed nop instructions themselves. */ |
| 2237 | frag_grow (40); |
| 2238 | } |
| 2239 | |
| 2240 | mips_move_labels (); |
| 2241 | |
| 2242 | #ifndef NO_ECOFF_DEBUGGING |
| 2243 | if (ECOFF_DEBUGGING) |
| 2244 | ecoff_fix_loc (old_frag, old_frag_offset); |
| 2245 | #endif |
| 2246 | } |
| 2247 | } |
| 2248 | else if (mips_relax.sequence != 2 && prev_nop_frag != NULL) |
| 2249 | { |
| 2250 | /* Work out how many nops in prev_nop_frag are needed by IP. */ |
| 2251 | int nops = nops_for_insn_or_target (history, ip); |
| 2252 | assert (nops <= prev_nop_frag_holds); |
| 2253 | |
| 2254 | /* Enforce NOPS as a minimum. */ |
| 2255 | if (nops > prev_nop_frag_required) |
| 2256 | prev_nop_frag_required = nops; |
| 2257 | |
| 2258 | if (prev_nop_frag_holds == prev_nop_frag_required) |
| 2259 | { |
| 2260 | /* Settle for the current number of nops. Update the history |
| 2261 | accordingly (for the benefit of any future .set reorder code). */ |
| 2262 | prev_nop_frag = NULL; |
| 2263 | insert_into_history (prev_nop_frag_since, |
| 2264 | prev_nop_frag_holds, NOP_INSN); |
| 2265 | } |
| 2266 | else |
| 2267 | { |
| 2268 | /* Allow this instruction to replace one of the nops that was |
| 2269 | tentatively added to prev_nop_frag. */ |
| 2270 | prev_nop_frag->fr_fix -= mips_opts.mips16 ? 2 : 4; |
| 2271 | prev_nop_frag_holds--; |
| 2272 | prev_nop_frag_since++; |
| 2273 | } |
| 2274 | } |
| 2275 | |
| 2276 | #ifdef OBJ_ELF |
| 2277 | /* The value passed to dwarf2_emit_insn is the distance between |
| 2278 | the beginning of the current instruction and the address that |
| 2279 | should be recorded in the debug tables. For MIPS16 debug info |
| 2280 | we want to use ISA-encoded addresses, so we pass -1 for an |
| 2281 | address higher by one than the current. */ |
| 2282 | dwarf2_emit_insn (mips_opts.mips16 ? -1 : 0); |
| 2283 | #endif |
| 2284 | |
| 2285 | /* Record the frag type before frag_var. */ |
| 2286 | if (history[0].frag) |
| 2287 | prev_insn_frag_type = history[0].frag->fr_type; |
| 2288 | |
| 2289 | if (address_expr |
| 2290 | && *reloc_type == BFD_RELOC_16_PCREL_S2 |
| 2291 | && (pinfo & INSN_UNCOND_BRANCH_DELAY || pinfo & INSN_COND_BRANCH_DELAY |
| 2292 | || pinfo & INSN_COND_BRANCH_LIKELY) |
| 2293 | && mips_relax_branch |
| 2294 | /* Don't try branch relaxation within .set nomacro, or within |
| 2295 | .set noat if we use $at for PIC computations. If it turns |
| 2296 | out that the branch was out-of-range, we'll get an error. */ |
| 2297 | && !mips_opts.warn_about_macros |
| 2298 | && !(mips_opts.noat && mips_pic != NO_PIC) |
| 2299 | && !mips_opts.mips16) |
| 2300 | { |
| 2301 | relaxed_branch = TRUE; |
| 2302 | add_relaxed_insn (ip, (relaxed_branch_length |
| 2303 | (NULL, NULL, |
| 2304 | (pinfo & INSN_UNCOND_BRANCH_DELAY) ? -1 |
| 2305 | : (pinfo & INSN_COND_BRANCH_LIKELY) ? 1 |
| 2306 | : 0)), 4, |
| 2307 | RELAX_BRANCH_ENCODE |
| 2308 | (pinfo & INSN_UNCOND_BRANCH_DELAY, |
| 2309 | pinfo & INSN_COND_BRANCH_LIKELY, |
| 2310 | pinfo & INSN_WRITE_GPR_31, |
| 2311 | 0), |
| 2312 | address_expr->X_add_symbol, |
| 2313 | address_expr->X_add_number); |
| 2314 | *reloc_type = BFD_RELOC_UNUSED; |
| 2315 | } |
| 2316 | else if (*reloc_type > BFD_RELOC_UNUSED) |
| 2317 | { |
| 2318 | /* We need to set up a variant frag. */ |
| 2319 | assert (mips_opts.mips16 && address_expr != NULL); |
| 2320 | add_relaxed_insn (ip, 4, 0, |
| 2321 | RELAX_MIPS16_ENCODE |
| 2322 | (*reloc_type - BFD_RELOC_UNUSED, |
| 2323 | mips16_small, mips16_ext, |
| 2324 | prev_pinfo & INSN_UNCOND_BRANCH_DELAY, |
| 2325 | history[0].mips16_absolute_jump_p), |
| 2326 | make_expr_symbol (address_expr), 0); |
| 2327 | } |
| 2328 | else if (mips_opts.mips16 |
| 2329 | && ! ip->use_extend |
| 2330 | && *reloc_type != BFD_RELOC_MIPS16_JMP) |
| 2331 | { |
| 2332 | if ((pinfo & INSN_UNCOND_BRANCH_DELAY) == 0) |
| 2333 | /* Make sure there is enough room to swap this instruction with |
| 2334 | a following jump instruction. */ |
| 2335 | frag_grow (6); |
| 2336 | add_fixed_insn (ip); |
| 2337 | } |
| 2338 | else |
| 2339 | { |
| 2340 | if (mips_opts.mips16 |
| 2341 | && mips_opts.noreorder |
| 2342 | && (prev_pinfo & INSN_UNCOND_BRANCH_DELAY) != 0) |
| 2343 | as_warn (_("extended instruction in delay slot")); |
| 2344 | |
| 2345 | if (mips_relax.sequence) |
| 2346 | { |
| 2347 | /* If we've reached the end of this frag, turn it into a variant |
| 2348 | frag and record the information for the instructions we've |
| 2349 | written so far. */ |
| 2350 | if (frag_room () < 4) |
| 2351 | relax_close_frag (); |
| 2352 | mips_relax.sizes[mips_relax.sequence - 1] += 4; |
| 2353 | } |
| 2354 | |
| 2355 | if (mips_relax.sequence != 2) |
| 2356 | mips_macro_warning.sizes[0] += 4; |
| 2357 | if (mips_relax.sequence != 1) |
| 2358 | mips_macro_warning.sizes[1] += 4; |
| 2359 | |
| 2360 | if (mips_opts.mips16) |
| 2361 | { |
| 2362 | ip->fixed_p = 1; |
| 2363 | ip->mips16_absolute_jump_p = (*reloc_type == BFD_RELOC_MIPS16_JMP); |
| 2364 | } |
| 2365 | add_fixed_insn (ip); |
| 2366 | } |
| 2367 | |
| 2368 | if (address_expr != NULL && *reloc_type <= BFD_RELOC_UNUSED) |
| 2369 | { |
| 2370 | if (address_expr->X_op == O_constant) |
| 2371 | { |
| 2372 | unsigned int tmp; |
| 2373 | |
| 2374 | switch (*reloc_type) |
| 2375 | { |
| 2376 | case BFD_RELOC_32: |
| 2377 | ip->insn_opcode |= address_expr->X_add_number; |
| 2378 | break; |
| 2379 | |
| 2380 | case BFD_RELOC_MIPS_HIGHEST: |
| 2381 | tmp = (address_expr->X_add_number + 0x800080008000ull) >> 48; |
| 2382 | ip->insn_opcode |= tmp & 0xffff; |
| 2383 | break; |
| 2384 | |
| 2385 | case BFD_RELOC_MIPS_HIGHER: |
| 2386 | tmp = (address_expr->X_add_number + 0x80008000ull) >> 32; |
| 2387 | ip->insn_opcode |= tmp & 0xffff; |
| 2388 | break; |
| 2389 | |
| 2390 | case BFD_RELOC_HI16_S: |
| 2391 | tmp = (address_expr->X_add_number + 0x8000) >> 16; |
| 2392 | ip->insn_opcode |= tmp & 0xffff; |
| 2393 | break; |
| 2394 | |
| 2395 | case BFD_RELOC_HI16: |
| 2396 | ip->insn_opcode |= (address_expr->X_add_number >> 16) & 0xffff; |
| 2397 | break; |
| 2398 | |
| 2399 | case BFD_RELOC_UNUSED: |
| 2400 | case BFD_RELOC_LO16: |
| 2401 | case BFD_RELOC_MIPS_GOT_DISP: |
| 2402 | ip->insn_opcode |= address_expr->X_add_number & 0xffff; |
| 2403 | break; |
| 2404 | |
| 2405 | case BFD_RELOC_MIPS_JMP: |
| 2406 | if ((address_expr->X_add_number & 3) != 0) |
| 2407 | as_bad (_("jump to misaligned address (0x%lx)"), |
| 2408 | (unsigned long) address_expr->X_add_number); |
| 2409 | if (address_expr->X_add_number & ~0xfffffff) |
| 2410 | as_bad (_("jump address range overflow (0x%lx)"), |
| 2411 | (unsigned long) address_expr->X_add_number); |
| 2412 | ip->insn_opcode |= (address_expr->X_add_number >> 2) & 0x3ffffff; |
| 2413 | break; |
| 2414 | |
| 2415 | case BFD_RELOC_MIPS16_JMP: |
| 2416 | if ((address_expr->X_add_number & 3) != 0) |
| 2417 | as_bad (_("jump to misaligned address (0x%lx)"), |
| 2418 | (unsigned long) address_expr->X_add_number); |
| 2419 | if (address_expr->X_add_number & ~0xfffffff) |
| 2420 | as_bad (_("jump address range overflow (0x%lx)"), |
| 2421 | (unsigned long) address_expr->X_add_number); |
| 2422 | ip->insn_opcode |= |
| 2423 | (((address_expr->X_add_number & 0x7c0000) << 3) |
| 2424 | | ((address_expr->X_add_number & 0xf800000) >> 7) |
| 2425 | | ((address_expr->X_add_number & 0x3fffc) >> 2)); |
| 2426 | break; |
| 2427 | |
| 2428 | case BFD_RELOC_16_PCREL_S2: |
| 2429 | if ((address_expr->X_add_number & 3) != 0) |
| 2430 | as_bad (_("branch to misaligned address (0x%lx)"), |
| 2431 | (unsigned long) address_expr->X_add_number); |
| 2432 | if (mips_relax_branch) |
| 2433 | goto need_reloc; |
| 2434 | if ((address_expr->X_add_number + 0x20000) & ~0x3ffff) |
| 2435 | as_bad (_("branch address range overflow (0x%lx)"), |
| 2436 | (unsigned long) address_expr->X_add_number); |
| 2437 | ip->insn_opcode |= (address_expr->X_add_number >> 2) & 0xffff; |
| 2438 | break; |
| 2439 | |
| 2440 | default: |
| 2441 | internalError (); |
| 2442 | } |
| 2443 | } |
| 2444 | else if (*reloc_type < BFD_RELOC_UNUSED) |
| 2445 | need_reloc: |
| 2446 | { |
| 2447 | reloc_howto_type *howto; |
| 2448 | int i; |
| 2449 | |
| 2450 | /* In a compound relocation, it is the final (outermost) |
| 2451 | operator that determines the relocated field. */ |
| 2452 | for (i = 1; i < 3; i++) |
| 2453 | if (reloc_type[i] == BFD_RELOC_UNUSED) |
| 2454 | break; |
| 2455 | |
| 2456 | howto = bfd_reloc_type_lookup (stdoutput, reloc_type[i - 1]); |
| 2457 | ip->fixp[0] = fix_new_exp (ip->frag, ip->where, |
| 2458 | bfd_get_reloc_size (howto), |
| 2459 | address_expr, |
| 2460 | reloc_type[0] == BFD_RELOC_16_PCREL_S2, |
| 2461 | reloc_type[0]); |
| 2462 | |
| 2463 | /* These relocations can have an addend that won't fit in |
| 2464 | 4 octets for 64bit assembly. */ |
| 2465 | if (HAVE_64BIT_GPRS |
| 2466 | && ! howto->partial_inplace |
| 2467 | && (reloc_type[0] == BFD_RELOC_16 |
| 2468 | || reloc_type[0] == BFD_RELOC_32 |
| 2469 | || reloc_type[0] == BFD_RELOC_MIPS_JMP |
| 2470 | || reloc_type[0] == BFD_RELOC_HI16_S |
| 2471 | || reloc_type[0] == BFD_RELOC_LO16 |
| 2472 | || reloc_type[0] == BFD_RELOC_GPREL16 |
| 2473 | || reloc_type[0] == BFD_RELOC_MIPS_LITERAL |
| 2474 | || reloc_type[0] == BFD_RELOC_GPREL32 |
| 2475 | || reloc_type[0] == BFD_RELOC_64 |
| 2476 | || reloc_type[0] == BFD_RELOC_CTOR |
| 2477 | || reloc_type[0] == BFD_RELOC_MIPS_SUB |
| 2478 | || reloc_type[0] == BFD_RELOC_MIPS_HIGHEST |
| 2479 | || reloc_type[0] == BFD_RELOC_MIPS_HIGHER |
| 2480 | || reloc_type[0] == BFD_RELOC_MIPS_SCN_DISP |
| 2481 | || reloc_type[0] == BFD_RELOC_MIPS_REL16 |
| 2482 | || reloc_type[0] == BFD_RELOC_MIPS_RELGOT |
| 2483 | || reloc_type[0] == BFD_RELOC_MIPS16_GPREL |
| 2484 | || reloc_type[0] == BFD_RELOC_MIPS16_HI16_S |
| 2485 | || reloc_type[0] == BFD_RELOC_MIPS16_LO16)) |
| 2486 | ip->fixp[0]->fx_no_overflow = 1; |
| 2487 | |
| 2488 | if (mips_relax.sequence) |
| 2489 | { |
| 2490 | if (mips_relax.first_fixup == 0) |
| 2491 | mips_relax.first_fixup = ip->fixp[0]; |
| 2492 | } |
| 2493 | else if (reloc_needs_lo_p (*reloc_type)) |
| 2494 | { |
| 2495 | struct mips_hi_fixup *hi_fixup; |
| 2496 | |
| 2497 | /* Reuse the last entry if it already has a matching %lo. */ |
| 2498 | hi_fixup = mips_hi_fixup_list; |
| 2499 | if (hi_fixup == 0 |
| 2500 | || !fixup_has_matching_lo_p (hi_fixup->fixp)) |
| 2501 | { |
| 2502 | hi_fixup = ((struct mips_hi_fixup *) |
| 2503 | xmalloc (sizeof (struct mips_hi_fixup))); |
| 2504 | hi_fixup->next = mips_hi_fixup_list; |
| 2505 | mips_hi_fixup_list = hi_fixup; |
| 2506 | } |
| 2507 | hi_fixup->fixp = ip->fixp[0]; |
| 2508 | hi_fixup->seg = now_seg; |
| 2509 | } |
| 2510 | |
| 2511 | /* Add fixups for the second and third relocations, if given. |
| 2512 | Note that the ABI allows the second relocation to be |
| 2513 | against RSS_UNDEF, RSS_GP, RSS_GP0 or RSS_LOC. At the |
| 2514 | moment we only use RSS_UNDEF, but we could add support |
| 2515 | for the others if it ever becomes necessary. */ |
| 2516 | for (i = 1; i < 3; i++) |
| 2517 | if (reloc_type[i] != BFD_RELOC_UNUSED) |
| 2518 | { |
| 2519 | ip->fixp[i] = fix_new (ip->frag, ip->where, |
| 2520 | ip->fixp[0]->fx_size, NULL, 0, |
| 2521 | FALSE, reloc_type[i]); |
| 2522 | |
| 2523 | /* Use fx_tcbit to mark compound relocs. */ |
| 2524 | ip->fixp[0]->fx_tcbit = 1; |
| 2525 | ip->fixp[i]->fx_tcbit = 1; |
| 2526 | } |
| 2527 | } |
| 2528 | } |
| 2529 | install_insn (ip); |
| 2530 | |
| 2531 | /* Update the register mask information. */ |
| 2532 | if (! mips_opts.mips16) |
| 2533 | { |
| 2534 | if (pinfo & INSN_WRITE_GPR_D) |
| 2535 | mips_gprmask |= 1 << EXTRACT_OPERAND (RD, *ip); |
| 2536 | if ((pinfo & (INSN_WRITE_GPR_T | INSN_READ_GPR_T)) != 0) |
| 2537 | mips_gprmask |= 1 << EXTRACT_OPERAND (RT, *ip); |
| 2538 | if (pinfo & INSN_READ_GPR_S) |
| 2539 | mips_gprmask |= 1 << EXTRACT_OPERAND (RS, *ip); |
| 2540 | if (pinfo & INSN_WRITE_GPR_31) |
| 2541 | mips_gprmask |= 1 << RA; |
| 2542 | if (pinfo & INSN_WRITE_FPR_D) |
| 2543 | mips_cprmask[1] |= 1 << EXTRACT_OPERAND (FD, *ip); |
| 2544 | if ((pinfo & (INSN_WRITE_FPR_S | INSN_READ_FPR_S)) != 0) |
| 2545 | mips_cprmask[1] |= 1 << EXTRACT_OPERAND (FS, *ip); |
| 2546 | if ((pinfo & (INSN_WRITE_FPR_T | INSN_READ_FPR_T)) != 0) |
| 2547 | mips_cprmask[1] |= 1 << EXTRACT_OPERAND (FT, *ip); |
| 2548 | if ((pinfo & INSN_READ_FPR_R) != 0) |
| 2549 | mips_cprmask[1] |= 1 << EXTRACT_OPERAND (FR, *ip); |
| 2550 | if (pinfo & INSN_COP) |
| 2551 | { |
| 2552 | /* We don't keep enough information to sort these cases out. |
| 2553 | The itbl support does keep this information however, although |
| 2554 | we currently don't support itbl fprmats as part of the cop |
| 2555 | instruction. May want to add this support in the future. */ |
| 2556 | } |
| 2557 | /* Never set the bit for $0, which is always zero. */ |
| 2558 | mips_gprmask &= ~1 << 0; |
| 2559 | } |
| 2560 | else |
| 2561 | { |
| 2562 | if (pinfo & (MIPS16_INSN_WRITE_X | MIPS16_INSN_READ_X)) |
| 2563 | mips_gprmask |= 1 << MIPS16_EXTRACT_OPERAND (RX, *ip); |
| 2564 | if (pinfo & (MIPS16_INSN_WRITE_Y | MIPS16_INSN_READ_Y)) |
| 2565 | mips_gprmask |= 1 << MIPS16_EXTRACT_OPERAND (RY, *ip); |
| 2566 | if (pinfo & MIPS16_INSN_WRITE_Z) |
| 2567 | mips_gprmask |= 1 << MIPS16_EXTRACT_OPERAND (RZ, *ip); |
| 2568 | if (pinfo & (MIPS16_INSN_WRITE_T | MIPS16_INSN_READ_T)) |
| 2569 | mips_gprmask |= 1 << TREG; |
| 2570 | if (pinfo & (MIPS16_INSN_WRITE_SP | MIPS16_INSN_READ_SP)) |
| 2571 | mips_gprmask |= 1 << SP; |
| 2572 | if (pinfo & (MIPS16_INSN_WRITE_31 | MIPS16_INSN_READ_31)) |
| 2573 | mips_gprmask |= 1 << RA; |
| 2574 | if (pinfo & MIPS16_INSN_WRITE_GPR_Y) |
| 2575 | mips_gprmask |= 1 << MIPS16OP_EXTRACT_REG32R (ip->insn_opcode); |
| 2576 | if (pinfo & MIPS16_INSN_READ_Z) |
| 2577 | mips_gprmask |= 1 << MIPS16_EXTRACT_OPERAND (MOVE32Z, *ip); |
| 2578 | if (pinfo & MIPS16_INSN_READ_GPR_X) |
| 2579 | mips_gprmask |= 1 << MIPS16_EXTRACT_OPERAND (REGR32, *ip); |
| 2580 | } |
| 2581 | |
| 2582 | if (mips_relax.sequence != 2 && !mips_opts.noreorder) |
| 2583 | { |
| 2584 | /* Filling the branch delay slot is more complex. We try to |
| 2585 | switch the branch with the previous instruction, which we can |
| 2586 | do if the previous instruction does not set up a condition |
| 2587 | that the branch tests and if the branch is not itself the |
| 2588 | target of any branch. */ |
| 2589 | if ((pinfo & INSN_UNCOND_BRANCH_DELAY) |
| 2590 | || (pinfo & INSN_COND_BRANCH_DELAY)) |
| 2591 | { |
| 2592 | if (mips_optimize < 2 |
| 2593 | /* If we have seen .set volatile or .set nomove, don't |
| 2594 | optimize. */ |
| 2595 | || mips_opts.nomove != 0 |
| 2596 | /* We can't swap if the previous instruction's position |
| 2597 | is fixed. */ |
| 2598 | || history[0].fixed_p |
| 2599 | /* If the previous previous insn was in a .set |
| 2600 | noreorder, we can't swap. Actually, the MIPS |
| 2601 | assembler will swap in this situation. However, gcc |
| 2602 | configured -with-gnu-as will generate code like |
| 2603 | .set noreorder |
| 2604 | lw $4,XXX |
| 2605 | .set reorder |
| 2606 | INSN |
| 2607 | bne $4,$0,foo |
| 2608 | in which we can not swap the bne and INSN. If gcc is |
| 2609 | not configured -with-gnu-as, it does not output the |
| 2610 | .set pseudo-ops. */ |
| 2611 | || history[1].noreorder_p |
| 2612 | /* If the branch is itself the target of a branch, we |
| 2613 | can not swap. We cheat on this; all we check for is |
| 2614 | whether there is a label on this instruction. If |
| 2615 | there are any branches to anything other than a |
| 2616 | label, users must use .set noreorder. */ |
| 2617 | || insn_labels != NULL |
| 2618 | /* If the previous instruction is in a variant frag |
| 2619 | other than this branch's one, we cannot do the swap. |
| 2620 | This does not apply to the mips16, which uses variant |
| 2621 | frags for different purposes. */ |
| 2622 | || (! mips_opts.mips16 |
| 2623 | && prev_insn_frag_type == rs_machine_dependent) |
| 2624 | /* Check for conflicts between the branch and the instructions |
| 2625 | before the candidate delay slot. */ |
| 2626 | || nops_for_insn (history + 1, ip) > 0 |
| 2627 | /* Check for conflicts between the swapped sequence and the |
| 2628 | target of the branch. */ |
| 2629 | || nops_for_sequence (2, history + 1, ip, history) > 0 |
| 2630 | /* We do not swap with a trap instruction, since it |
| 2631 | complicates trap handlers to have the trap |
| 2632 | instruction be in a delay slot. */ |
| 2633 | || (prev_pinfo & INSN_TRAP) |
| 2634 | /* If the branch reads a register that the previous |
| 2635 | instruction sets, we can not swap. */ |
| 2636 | || (! mips_opts.mips16 |
| 2637 | && (prev_pinfo & INSN_WRITE_GPR_T) |
| 2638 | && insn_uses_reg (ip, EXTRACT_OPERAND (RT, history[0]), |
| 2639 | MIPS_GR_REG)) |
| 2640 | || (! mips_opts.mips16 |
| 2641 | && (prev_pinfo & INSN_WRITE_GPR_D) |
| 2642 | && insn_uses_reg (ip, EXTRACT_OPERAND (RD, history[0]), |
| 2643 | MIPS_GR_REG)) |
| 2644 | || (mips_opts.mips16 |
| 2645 | && (((prev_pinfo & MIPS16_INSN_WRITE_X) |
| 2646 | && (insn_uses_reg |
| 2647 | (ip, MIPS16_EXTRACT_OPERAND (RX, history[0]), |
| 2648 | MIPS16_REG))) |
| 2649 | || ((prev_pinfo & MIPS16_INSN_WRITE_Y) |
| 2650 | && (insn_uses_reg |
| 2651 | (ip, MIPS16_EXTRACT_OPERAND (RY, history[0]), |
| 2652 | MIPS16_REG))) |
| 2653 | || ((prev_pinfo & MIPS16_INSN_WRITE_Z) |
| 2654 | && (insn_uses_reg |
| 2655 | (ip, MIPS16_EXTRACT_OPERAND (RZ, history[0]), |
| 2656 | MIPS16_REG))) |
| 2657 | || ((prev_pinfo & MIPS16_INSN_WRITE_T) |
| 2658 | && insn_uses_reg (ip, TREG, MIPS_GR_REG)) |
| 2659 | || ((prev_pinfo & MIPS16_INSN_WRITE_31) |
| 2660 | && insn_uses_reg (ip, RA, MIPS_GR_REG)) |
| 2661 | || ((prev_pinfo & MIPS16_INSN_WRITE_GPR_Y) |
| 2662 | && insn_uses_reg (ip, |
| 2663 | MIPS16OP_EXTRACT_REG32R |
| 2664 | (history[0].insn_opcode), |
| 2665 | MIPS_GR_REG)))) |
| 2666 | /* If the branch writes a register that the previous |
| 2667 | instruction sets, we can not swap (we know that |
| 2668 | branches write only to RD or to $31). */ |
| 2669 | || (! mips_opts.mips16 |
| 2670 | && (prev_pinfo & INSN_WRITE_GPR_T) |
| 2671 | && (((pinfo & INSN_WRITE_GPR_D) |
| 2672 | && (EXTRACT_OPERAND (RT, history[0]) |
| 2673 | == EXTRACT_OPERAND (RD, *ip))) |
| 2674 | || ((pinfo & INSN_WRITE_GPR_31) |
| 2675 | && EXTRACT_OPERAND (RT, history[0]) == RA))) |
| 2676 | || (! mips_opts.mips16 |
| 2677 | && (prev_pinfo & INSN_WRITE_GPR_D) |
| 2678 | && (((pinfo & INSN_WRITE_GPR_D) |
| 2679 | && (EXTRACT_OPERAND (RD, history[0]) |
| 2680 | == EXTRACT_OPERAND (RD, *ip))) |
| 2681 | || ((pinfo & INSN_WRITE_GPR_31) |
| 2682 | && EXTRACT_OPERAND (RD, history[0]) == RA))) |
| 2683 | || (mips_opts.mips16 |
| 2684 | && (pinfo & MIPS16_INSN_WRITE_31) |
| 2685 | && ((prev_pinfo & MIPS16_INSN_WRITE_31) |
| 2686 | || ((prev_pinfo & MIPS16_INSN_WRITE_GPR_Y) |
| 2687 | && (MIPS16OP_EXTRACT_REG32R (history[0].insn_opcode) |
| 2688 | == RA)))) |
| 2689 | /* If the branch writes a register that the previous |
| 2690 | instruction reads, we can not swap (we know that |
| 2691 | branches only write to RD or to $31). */ |
| 2692 | || (! mips_opts.mips16 |
| 2693 | && (pinfo & INSN_WRITE_GPR_D) |
| 2694 | && insn_uses_reg (&history[0], |
| 2695 | EXTRACT_OPERAND (RD, *ip), |
| 2696 | MIPS_GR_REG)) |
| 2697 | || (! mips_opts.mips16 |
| 2698 | && (pinfo & INSN_WRITE_GPR_31) |
| 2699 | && insn_uses_reg (&history[0], RA, MIPS_GR_REG)) |
| 2700 | || (mips_opts.mips16 |
| 2701 | && (pinfo & MIPS16_INSN_WRITE_31) |
| 2702 | && insn_uses_reg (&history[0], RA, MIPS_GR_REG)) |
| 2703 | /* If one instruction sets a condition code and the |
| 2704 | other one uses a condition code, we can not swap. */ |
| 2705 | || ((pinfo & INSN_READ_COND_CODE) |
| 2706 | && (prev_pinfo & INSN_WRITE_COND_CODE)) |
| 2707 | || ((pinfo & INSN_WRITE_COND_CODE) |
| 2708 | && (prev_pinfo & INSN_READ_COND_CODE)) |
| 2709 | /* If the previous instruction uses the PC, we can not |
| 2710 | swap. */ |
| 2711 | || (mips_opts.mips16 |
| 2712 | && (prev_pinfo & MIPS16_INSN_READ_PC)) |
| 2713 | /* If the previous instruction had a fixup in mips16 |
| 2714 | mode, we can not swap. This normally means that the |
| 2715 | previous instruction was a 4 byte branch anyhow. */ |
| 2716 | || (mips_opts.mips16 && history[0].fixp[0]) |
| 2717 | /* If the previous instruction is a sync, sync.l, or |
| 2718 | sync.p, we can not swap. */ |
| 2719 | || (prev_pinfo & INSN_SYNC)) |
| 2720 | { |
| 2721 | if (mips_opts.mips16 |
| 2722 | && (pinfo & INSN_UNCOND_BRANCH_DELAY) |
| 2723 | && (pinfo & (MIPS16_INSN_READ_X | MIPS16_INSN_READ_31)) |
| 2724 | && (mips_opts.isa == ISA_MIPS32 |
| 2725 | || mips_opts.isa == ISA_MIPS32R2 |
| 2726 | || mips_opts.isa == ISA_MIPS64 |
| 2727 | || mips_opts.isa == ISA_MIPS64R2)) |
| 2728 | { |
| 2729 | /* Convert MIPS16 jr/jalr into a "compact" jump. */ |
| 2730 | ip->insn_opcode |= 0x0080; |
| 2731 | install_insn (ip); |
| 2732 | insert_into_history (0, 1, ip); |
| 2733 | } |
| 2734 | else |
| 2735 | { |
| 2736 | /* We could do even better for unconditional branches to |
| 2737 | portions of this object file; we could pick up the |
| 2738 | instruction at the destination, put it in the delay |
| 2739 | slot, and bump the destination address. */ |
| 2740 | insert_into_history (0, 1, ip); |
| 2741 | emit_nop (); |
| 2742 | } |
| 2743 | |
| 2744 | if (mips_relax.sequence) |
| 2745 | mips_relax.sizes[mips_relax.sequence - 1] += 4; |
| 2746 | } |
| 2747 | else |
| 2748 | { |
| 2749 | /* It looks like we can actually do the swap. */ |
| 2750 | struct mips_cl_insn delay = history[0]; |
| 2751 | if (mips_opts.mips16) |
| 2752 | { |
| 2753 | know (delay.frag == ip->frag); |
| 2754 | move_insn (ip, delay.frag, delay.where); |
| 2755 | move_insn (&delay, ip->frag, ip->where + insn_length (ip)); |
| 2756 | } |
| 2757 | else if (relaxed_branch) |
| 2758 | { |
| 2759 | /* Add the delay slot instruction to the end of the |
| 2760 | current frag and shrink the fixed part of the |
| 2761 | original frag. If the branch occupies the tail of |
| 2762 | the latter, move it backwards to cover the gap. */ |
| 2763 | delay.frag->fr_fix -= 4; |
| 2764 | if (delay.frag == ip->frag) |
| 2765 | move_insn (ip, ip->frag, ip->where - 4); |
| 2766 | add_fixed_insn (&delay); |
| 2767 | } |
| 2768 | else |
| 2769 | { |
| 2770 | move_insn (&delay, ip->frag, ip->where); |
| 2771 | move_insn (ip, history[0].frag, history[0].where); |
| 2772 | } |
| 2773 | history[0] = *ip; |
| 2774 | delay.fixed_p = 1; |
| 2775 | insert_into_history (0, 1, &delay); |
| 2776 | } |
| 2777 | |
| 2778 | /* If that was an unconditional branch, forget the previous |
| 2779 | insn information. */ |
| 2780 | if (pinfo & INSN_UNCOND_BRANCH_DELAY) |
| 2781 | mips_no_prev_insn (); |
| 2782 | } |
| 2783 | else if (pinfo & INSN_COND_BRANCH_LIKELY) |
| 2784 | { |
| 2785 | /* We don't yet optimize a branch likely. What we should do |
| 2786 | is look at the target, copy the instruction found there |
| 2787 | into the delay slot, and increment the branch to jump to |
| 2788 | the next instruction. */ |
| 2789 | insert_into_history (0, 1, ip); |
| 2790 | emit_nop (); |
| 2791 | } |
| 2792 | else |
| 2793 | insert_into_history (0, 1, ip); |
| 2794 | } |
| 2795 | else |
| 2796 | insert_into_history (0, 1, ip); |
| 2797 | |
| 2798 | /* We just output an insn, so the next one doesn't have a label. */ |
| 2799 | mips_clear_insn_labels (); |
| 2800 | } |
| 2801 | |
| 2802 | /* Forget that there was any previous instruction or label. */ |
| 2803 | |
| 2804 | static void |
| 2805 | mips_no_prev_insn (void) |
| 2806 | { |
| 2807 | prev_nop_frag = NULL; |
| 2808 | insert_into_history (0, ARRAY_SIZE (history), NOP_INSN); |
| 2809 | mips_clear_insn_labels (); |
| 2810 | } |
| 2811 | |
| 2812 | /* This function must be called before we emit something other than |
| 2813 | instructions. It is like mips_no_prev_insn except that it inserts |
| 2814 | any NOPS that might be needed by previous instructions. */ |
| 2815 | |
| 2816 | void |
| 2817 | mips_emit_delays (void) |
| 2818 | { |
| 2819 | if (! mips_opts.noreorder) |
| 2820 | { |
| 2821 | int nops = nops_for_insn (history, NULL); |
| 2822 | if (nops > 0) |
| 2823 | { |
| 2824 | while (nops-- > 0) |
| 2825 | add_fixed_insn (NOP_INSN); |
| 2826 | mips_move_labels (); |
| 2827 | } |
| 2828 | } |
| 2829 | mips_no_prev_insn (); |
| 2830 | } |
| 2831 | |
| 2832 | /* Start a (possibly nested) noreorder block. */ |
| 2833 | |
| 2834 | static void |
| 2835 | start_noreorder (void) |
| 2836 | { |
| 2837 | if (mips_opts.noreorder == 0) |
| 2838 | { |
| 2839 | unsigned int i; |
| 2840 | int nops; |
| 2841 | |
| 2842 | /* None of the instructions before the .set noreorder can be moved. */ |
| 2843 | for (i = 0; i < ARRAY_SIZE (history); i++) |
| 2844 | history[i].fixed_p = 1; |
| 2845 | |
| 2846 | /* Insert any nops that might be needed between the .set noreorder |
| 2847 | block and the previous instructions. We will later remove any |
| 2848 | nops that turn out not to be needed. */ |
| 2849 | nops = nops_for_insn (history, NULL); |
| 2850 | if (nops > 0) |
| 2851 | { |
| 2852 | if (mips_optimize != 0) |
| 2853 | { |
| 2854 | /* Record the frag which holds the nop instructions, so |
| 2855 | that we can remove them if we don't need them. */ |
| 2856 | frag_grow (mips_opts.mips16 ? nops * 2 : nops * 4); |
| 2857 | prev_nop_frag = frag_now; |
| 2858 | prev_nop_frag_holds = nops; |
| 2859 | prev_nop_frag_required = 0; |
| 2860 | prev_nop_frag_since = 0; |
| 2861 | } |
| 2862 | |
| 2863 | for (; nops > 0; --nops) |
| 2864 | add_fixed_insn (NOP_INSN); |
| 2865 | |
| 2866 | /* Move on to a new frag, so that it is safe to simply |
| 2867 | decrease the size of prev_nop_frag. */ |
| 2868 | frag_wane (frag_now); |
| 2869 | frag_new (0); |
| 2870 | mips_move_labels (); |
| 2871 | } |
| 2872 | mips16_mark_labels (); |
| 2873 | mips_clear_insn_labels (); |
| 2874 | } |
| 2875 | mips_opts.noreorder++; |
| 2876 | mips_any_noreorder = 1; |
| 2877 | } |
| 2878 | |
| 2879 | /* End a nested noreorder block. */ |
| 2880 | |
| 2881 | static void |
| 2882 | end_noreorder (void) |
| 2883 | { |
| 2884 | mips_opts.noreorder--; |
| 2885 | if (mips_opts.noreorder == 0 && prev_nop_frag != NULL) |
| 2886 | { |
| 2887 | /* Commit to inserting prev_nop_frag_required nops and go back to |
| 2888 | handling nop insertion the .set reorder way. */ |
| 2889 | prev_nop_frag->fr_fix -= ((prev_nop_frag_holds - prev_nop_frag_required) |
| 2890 | * (mips_opts.mips16 ? 2 : 4)); |
| 2891 | insert_into_history (prev_nop_frag_since, |
| 2892 | prev_nop_frag_required, NOP_INSN); |
| 2893 | prev_nop_frag = NULL; |
| 2894 | } |
| 2895 | } |
| 2896 | |
| 2897 | /* Set up global variables for the start of a new macro. */ |
| 2898 | |
| 2899 | static void |
| 2900 | macro_start (void) |
| 2901 | { |
| 2902 | memset (&mips_macro_warning.sizes, 0, sizeof (mips_macro_warning.sizes)); |
| 2903 | mips_macro_warning.delay_slot_p = (mips_opts.noreorder |
| 2904 | && (history[0].insn_mo->pinfo |
| 2905 | & (INSN_UNCOND_BRANCH_DELAY |
| 2906 | | INSN_COND_BRANCH_DELAY |
| 2907 | | INSN_COND_BRANCH_LIKELY)) != 0); |
| 2908 | } |
| 2909 | |
| 2910 | /* Given that a macro is longer than 4 bytes, return the appropriate warning |
| 2911 | for it. Return null if no warning is needed. SUBTYPE is a bitmask of |
| 2912 | RELAX_DELAY_SLOT and RELAX_NOMACRO. */ |
| 2913 | |
| 2914 | static const char * |
| 2915 | macro_warning (relax_substateT subtype) |
| 2916 | { |
| 2917 | if (subtype & RELAX_DELAY_SLOT) |
| 2918 | return _("Macro instruction expanded into multiple instructions" |
| 2919 | " in a branch delay slot"); |
| 2920 | else if (subtype & RELAX_NOMACRO) |
| 2921 | return _("Macro instruction expanded into multiple instructions"); |
| 2922 | else |
| 2923 | return 0; |
| 2924 | } |
| 2925 | |
| 2926 | /* Finish up a macro. Emit warnings as appropriate. */ |
| 2927 | |
| 2928 | static void |
| 2929 | macro_end (void) |
| 2930 | { |
| 2931 | if (mips_macro_warning.sizes[0] > 4 || mips_macro_warning.sizes[1] > 4) |
| 2932 | { |
| 2933 | relax_substateT subtype; |
| 2934 | |
| 2935 | /* Set up the relaxation warning flags. */ |
| 2936 | subtype = 0; |
| 2937 | if (mips_macro_warning.sizes[1] > mips_macro_warning.sizes[0]) |
| 2938 | subtype |= RELAX_SECOND_LONGER; |
| 2939 | if (mips_opts.warn_about_macros) |
| 2940 | subtype |= RELAX_NOMACRO; |
| 2941 | if (mips_macro_warning.delay_slot_p) |
| 2942 | subtype |= RELAX_DELAY_SLOT; |
| 2943 | |
| 2944 | if (mips_macro_warning.sizes[0] > 4 && mips_macro_warning.sizes[1] > 4) |
| 2945 | { |
| 2946 | /* Either the macro has a single implementation or both |
| 2947 | implementations are longer than 4 bytes. Emit the |
| 2948 | warning now. */ |
| 2949 | const char *msg = macro_warning (subtype); |
| 2950 | if (msg != 0) |
| 2951 | as_warn (msg); |
| 2952 | } |
| 2953 | else |
| 2954 | { |
| 2955 | /* One implementation might need a warning but the other |
| 2956 | definitely doesn't. */ |
| 2957 | mips_macro_warning.first_frag->fr_subtype |= subtype; |
| 2958 | } |
| 2959 | } |
| 2960 | } |
| 2961 | |
| 2962 | /* Read a macro's relocation codes from *ARGS and store them in *R. |
| 2963 | The first argument in *ARGS will be either the code for a single |
| 2964 | relocation or -1 followed by the three codes that make up a |
| 2965 | composite relocation. */ |
| 2966 | |
| 2967 | static void |
| 2968 | macro_read_relocs (va_list *args, bfd_reloc_code_real_type *r) |
| 2969 | { |
| 2970 | int i, next; |
| 2971 | |
| 2972 | next = va_arg (*args, int); |
| 2973 | if (next >= 0) |
| 2974 | r[0] = (bfd_reloc_code_real_type) next; |
| 2975 | else |
| 2976 | for (i = 0; i < 3; i++) |
| 2977 | r[i] = (bfd_reloc_code_real_type) va_arg (*args, int); |
| 2978 | } |
| 2979 | |
| 2980 | /* Build an instruction created by a macro expansion. This is passed |
| 2981 | a pointer to the count of instructions created so far, an |
| 2982 | expression, the name of the instruction to build, an operand format |
| 2983 | string, and corresponding arguments. */ |
| 2984 | |
| 2985 | static void |
| 2986 | macro_build (expressionS *ep, const char *name, const char *fmt, ...) |
| 2987 | { |
| 2988 | const struct mips_opcode *mo; |
| 2989 | struct mips_cl_insn insn; |
| 2990 | bfd_reloc_code_real_type r[3]; |
| 2991 | va_list args; |
| 2992 | |
| 2993 | va_start (args, fmt); |
| 2994 | |
| 2995 | if (mips_opts.mips16) |
| 2996 | { |
| 2997 | mips16_macro_build (ep, name, fmt, args); |
| 2998 | va_end (args); |
| 2999 | return; |
| 3000 | } |
| 3001 | |
| 3002 | r[0] = BFD_RELOC_UNUSED; |
| 3003 | r[1] = BFD_RELOC_UNUSED; |
| 3004 | r[2] = BFD_RELOC_UNUSED; |
| 3005 | mo = (struct mips_opcode *) hash_find (op_hash, name); |
| 3006 | assert (mo); |
| 3007 | assert (strcmp (name, mo->name) == 0); |
| 3008 | |
| 3009 | /* Search until we get a match for NAME. It is assumed here that |
| 3010 | macros will never generate MDMX or MIPS-3D instructions. */ |
| 3011 | while (strcmp (fmt, mo->args) != 0 |
| 3012 | || mo->pinfo == INSN_MACRO |
| 3013 | || !OPCODE_IS_MEMBER (mo, |
| 3014 | (mips_opts.isa |
| 3015 | | (file_ase_mips16 ? INSN_MIPS16 : 0)), |
| 3016 | mips_opts.arch) |
| 3017 | || (mips_opts.arch == CPU_R4650 && (mo->pinfo & FP_D) != 0)) |
| 3018 | { |
| 3019 | ++mo; |
| 3020 | assert (mo->name); |
| 3021 | assert (strcmp (name, mo->name) == 0); |
| 3022 | } |
| 3023 | |
| 3024 | create_insn (&insn, mo); |
| 3025 | for (;;) |
| 3026 | { |
| 3027 | switch (*fmt++) |
| 3028 | { |
| 3029 | case '\0': |
| 3030 | break; |
| 3031 | |
| 3032 | case ',': |
| 3033 | case '(': |
| 3034 | case ')': |
| 3035 | continue; |
| 3036 | |
| 3037 | case '+': |
| 3038 | switch (*fmt++) |
| 3039 | { |
| 3040 | case 'A': |
| 3041 | case 'E': |
| 3042 | INSERT_OPERAND (SHAMT, insn, va_arg (args, int)); |
| 3043 | continue; |
| 3044 | |
| 3045 | case 'B': |
| 3046 | case 'F': |
| 3047 | /* Note that in the macro case, these arguments are already |
| 3048 | in MSB form. (When handling the instruction in the |
| 3049 | non-macro case, these arguments are sizes from which |
| 3050 | MSB values must be calculated.) */ |
| 3051 | INSERT_OPERAND (INSMSB, insn, va_arg (args, int)); |
| 3052 | continue; |
| 3053 | |
| 3054 | case 'C': |
| 3055 | case 'G': |
| 3056 | case 'H': |
| 3057 | /* Note that in the macro case, these arguments are already |
| 3058 | in MSBD form. (When handling the instruction in the |
| 3059 | non-macro case, these arguments are sizes from which |
| 3060 | MSBD values must be calculated.) */ |
| 3061 | INSERT_OPERAND (EXTMSBD, insn, va_arg (args, int)); |
| 3062 | continue; |
| 3063 | |
| 3064 | default: |
| 3065 | internalError (); |
| 3066 | } |
| 3067 | continue; |
| 3068 | |
| 3069 | case 't': |
| 3070 | case 'w': |
| 3071 | case 'E': |
| 3072 | INSERT_OPERAND (RT, insn, va_arg (args, int)); |
| 3073 | continue; |
| 3074 | |
| 3075 | case 'c': |
| 3076 | INSERT_OPERAND (CODE, insn, va_arg (args, int)); |
| 3077 | continue; |
| 3078 | |
| 3079 | case 'T': |
| 3080 | case 'W': |
| 3081 | INSERT_OPERAND (FT, insn, va_arg (args, int)); |
| 3082 | continue; |
| 3083 | |
| 3084 | case 'd': |
| 3085 | case 'G': |
| 3086 | case 'K': |
| 3087 | INSERT_OPERAND (RD, insn, va_arg (args, int)); |
| 3088 | continue; |
| 3089 | |
| 3090 | case 'U': |
| 3091 | { |
| 3092 | int tmp = va_arg (args, int); |
| 3093 | |
| 3094 | INSERT_OPERAND (RT, insn, tmp); |
| 3095 | INSERT_OPERAND (RD, insn, tmp); |
| 3096 | continue; |
| 3097 | } |
| 3098 | |
| 3099 | case 'V': |
| 3100 | case 'S': |
| 3101 | INSERT_OPERAND (FS, insn, va_arg (args, int)); |
| 3102 | continue; |
| 3103 | |
| 3104 | case 'z': |
| 3105 | continue; |
| 3106 | |
| 3107 | case '<': |
| 3108 | INSERT_OPERAND (SHAMT, insn, va_arg (args, int)); |
| 3109 | continue; |
| 3110 | |
| 3111 | case 'D': |
| 3112 | INSERT_OPERAND (FD, insn, va_arg (args, int)); |
| 3113 | continue; |
| 3114 | |
| 3115 | case 'B': |
| 3116 | INSERT_OPERAND (CODE20, insn, va_arg (args, int)); |
| 3117 | continue; |
| 3118 | |
| 3119 | case 'J': |
| 3120 | INSERT_OPERAND (CODE19, insn, va_arg (args, int)); |
| 3121 | continue; |
| 3122 | |
| 3123 | case 'q': |
| 3124 | INSERT_OPERAND (CODE2, insn, va_arg (args, int)); |
| 3125 | continue; |
| 3126 | |
| 3127 | case 'b': |
| 3128 | case 's': |
| 3129 | case 'r': |
| 3130 | case 'v': |
| 3131 | INSERT_OPERAND (RS, insn, va_arg (args, int)); |
| 3132 | continue; |
| 3133 | |
| 3134 | case 'i': |
| 3135 | case 'j': |
| 3136 | case 'o': |
| 3137 | macro_read_relocs (&args, r); |
| 3138 | assert (*r == BFD_RELOC_GPREL16 |
| 3139 | || *r == BFD_RELOC_MIPS_LITERAL |
| 3140 | || *r == BFD_RELOC_MIPS_HIGHER |
| 3141 | || *r == BFD_RELOC_HI16_S |
| 3142 | || *r == BFD_RELOC_LO16 |
| 3143 | || *r == BFD_RELOC_MIPS_GOT16 |
| 3144 | || *r == BFD_RELOC_MIPS_CALL16 |
| 3145 | || *r == BFD_RELOC_MIPS_GOT_DISP |
| 3146 | || *r == BFD_RELOC_MIPS_GOT_PAGE |
| 3147 | || *r == BFD_RELOC_MIPS_GOT_OFST |
| 3148 | || *r == BFD_RELOC_MIPS_GOT_LO16 |
| 3149 | || *r == BFD_RELOC_MIPS_CALL_LO16); |
| 3150 | continue; |
| 3151 | |
| 3152 | case 'u': |
| 3153 | macro_read_relocs (&args, r); |
| 3154 | assert (ep != NULL |
| 3155 | && (ep->X_op == O_constant |
| 3156 | || (ep->X_op == O_symbol |
| 3157 | && (*r == BFD_RELOC_MIPS_HIGHEST |
| 3158 | || *r == BFD_RELOC_HI16_S |
| 3159 | || *r == BFD_RELOC_HI16 |
| 3160 | || *r == BFD_RELOC_GPREL16 |
| 3161 | || *r == BFD_RELOC_MIPS_GOT_HI16 |
| 3162 | || *r == BFD_RELOC_MIPS_CALL_HI16)))); |
| 3163 | continue; |
| 3164 | |
| 3165 | case 'p': |
| 3166 | assert (ep != NULL); |
| 3167 | |
| 3168 | /* |
| 3169 | * This allows macro() to pass an immediate expression for |
| 3170 | * creating short branches without creating a symbol. |
| 3171 | * |
| 3172 | * We don't allow branch relaxation for these branches, as |
| 3173 | * they should only appear in ".set nomacro" anyway. |
| 3174 | */ |
| 3175 | if (ep->X_op == O_constant) |
| 3176 | { |
| 3177 | if ((ep->X_add_number & 3) != 0) |
| 3178 | as_bad (_("branch to misaligned address (0x%lx)"), |
| 3179 | (unsigned long) ep->X_add_number); |
| 3180 | if ((ep->X_add_number + 0x20000) & ~0x3ffff) |
| 3181 | as_bad (_("branch address range overflow (0x%lx)"), |
| 3182 | (unsigned long) ep->X_add_number); |
| 3183 | insn.insn_opcode |= (ep->X_add_number >> 2) & 0xffff; |
| 3184 | ep = NULL; |
| 3185 | } |
| 3186 | else |
| 3187 | *r = BFD_RELOC_16_PCREL_S2; |
| 3188 | continue; |
| 3189 | |
| 3190 | case 'a': |
| 3191 | assert (ep != NULL); |
| 3192 | *r = BFD_RELOC_MIPS_JMP; |
| 3193 | continue; |
| 3194 | |
| 3195 | case 'C': |
| 3196 | insn.insn_opcode |= va_arg (args, unsigned long); |
| 3197 | continue; |
| 3198 | |
| 3199 | default: |
| 3200 | internalError (); |
| 3201 | } |
| 3202 | break; |
| 3203 | } |
| 3204 | va_end (args); |
| 3205 | assert (*r == BFD_RELOC_UNUSED ? ep == NULL : ep != NULL); |
| 3206 | |
| 3207 | append_insn (&insn, ep, r); |
| 3208 | } |
| 3209 | |
| 3210 | static void |
| 3211 | mips16_macro_build (expressionS *ep, const char *name, const char *fmt, |
| 3212 | va_list args) |
| 3213 | { |
| 3214 | struct mips_opcode *mo; |
| 3215 | struct mips_cl_insn insn; |
| 3216 | bfd_reloc_code_real_type r[3] |
| 3217 | = {BFD_RELOC_UNUSED, BFD_RELOC_UNUSED, BFD_RELOC_UNUSED}; |
| 3218 | |
| 3219 | mo = (struct mips_opcode *) hash_find (mips16_op_hash, name); |
| 3220 | assert (mo); |
| 3221 | assert (strcmp (name, mo->name) == 0); |
| 3222 | |
| 3223 | while (strcmp (fmt, mo->args) != 0 || mo->pinfo == INSN_MACRO) |
| 3224 | { |
| 3225 | ++mo; |
| 3226 | assert (mo->name); |
| 3227 | assert (strcmp (name, mo->name) == 0); |
| 3228 | } |
| 3229 | |
| 3230 | create_insn (&insn, mo); |
| 3231 | for (;;) |
| 3232 | { |
| 3233 | int c; |
| 3234 | |
| 3235 | c = *fmt++; |
| 3236 | switch (c) |
| 3237 | { |
| 3238 | case '\0': |
| 3239 | break; |
| 3240 | |
| 3241 | case ',': |
| 3242 | case '(': |
| 3243 | case ')': |
| 3244 | continue; |
| 3245 | |
| 3246 | case 'y': |
| 3247 | case 'w': |
| 3248 | MIPS16_INSERT_OPERAND (RY, insn, va_arg (args, int)); |
| 3249 | continue; |
| 3250 | |
| 3251 | case 'x': |
| 3252 | case 'v': |
| 3253 | MIPS16_INSERT_OPERAND (RX, insn, va_arg (args, int)); |
| 3254 | continue; |
| 3255 | |
| 3256 | case 'z': |
| 3257 | MIPS16_INSERT_OPERAND (RZ, insn, va_arg (args, int)); |
| 3258 | continue; |
| 3259 | |
| 3260 | case 'Z': |
| 3261 | MIPS16_INSERT_OPERAND (MOVE32Z, insn, va_arg (args, int)); |
| 3262 | continue; |
| 3263 | |
| 3264 | case '0': |
| 3265 | case 'S': |
| 3266 | case 'P': |
| 3267 | case 'R': |
| 3268 | continue; |
| 3269 | |
| 3270 | case 'X': |
| 3271 | MIPS16_INSERT_OPERAND (REGR32, insn, va_arg (args, int)); |
| 3272 | continue; |
| 3273 | |
| 3274 | case 'Y': |
| 3275 | { |
| 3276 | int regno; |
| 3277 | |
| 3278 | regno = va_arg (args, int); |
| 3279 | regno = ((regno & 7) << 2) | ((regno & 0x18) >> 3); |
| 3280 | insn.insn_opcode |= regno << MIPS16OP_SH_REG32R; |
| 3281 | } |
| 3282 | continue; |
| 3283 | |
| 3284 | case '<': |
| 3285 | case '>': |
| 3286 | case '4': |
| 3287 | case '5': |
| 3288 | case 'H': |
| 3289 | case 'W': |
| 3290 | case 'D': |
| 3291 | case 'j': |
| 3292 | case '8': |
| 3293 | case 'V': |
| 3294 | case 'C': |
| 3295 | case 'U': |
| 3296 | case 'k': |
| 3297 | case 'K': |
| 3298 | case 'p': |
| 3299 | case 'q': |
| 3300 | { |
| 3301 | assert (ep != NULL); |
| 3302 | |
| 3303 | if (ep->X_op != O_constant) |
| 3304 | *r = (int) BFD_RELOC_UNUSED + c; |
| 3305 | else |
| 3306 | { |
| 3307 | mips16_immed (NULL, 0, c, ep->X_add_number, FALSE, FALSE, |
| 3308 | FALSE, &insn.insn_opcode, &insn.use_extend, |
| 3309 | &insn.extend); |
| 3310 | ep = NULL; |
| 3311 | *r = BFD_RELOC_UNUSED; |
| 3312 | } |
| 3313 | } |
| 3314 | continue; |
| 3315 | |
| 3316 | case '6': |
| 3317 | MIPS16_INSERT_OPERAND (IMM6, insn, va_arg (args, int)); |
| 3318 | continue; |
| 3319 | } |
| 3320 | |
| 3321 | break; |
| 3322 | } |
| 3323 | |
| 3324 | assert (*r == BFD_RELOC_UNUSED ? ep == NULL : ep != NULL); |
| 3325 | |
| 3326 | append_insn (&insn, ep, r); |
| 3327 | } |
| 3328 | |
| 3329 | /* |
| 3330 | * Sign-extend 32-bit mode constants that have bit 31 set and all |
| 3331 | * higher bits unset. |
| 3332 | */ |
| 3333 | static void |
| 3334 | normalize_constant_expr (expressionS *ex) |
| 3335 | { |
| 3336 | if (ex->X_op == O_constant |
| 3337 | && IS_ZEXT_32BIT_NUM (ex->X_add_number)) |
| 3338 | ex->X_add_number = (((ex->X_add_number & 0xffffffff) ^ 0x80000000) |
| 3339 | - 0x80000000); |
| 3340 | } |
| 3341 | |
| 3342 | /* |
| 3343 | * Sign-extend 32-bit mode address offsets that have bit 31 set and |
| 3344 | * all higher bits unset. |
| 3345 | */ |
| 3346 | static void |
| 3347 | normalize_address_expr (expressionS *ex) |
| 3348 | { |
| 3349 | if (((ex->X_op == O_constant && HAVE_32BIT_ADDRESSES) |
| 3350 | || (ex->X_op == O_symbol && HAVE_32BIT_SYMBOLS)) |
| 3351 | && IS_ZEXT_32BIT_NUM (ex->X_add_number)) |
| 3352 | ex->X_add_number = (((ex->X_add_number & 0xffffffff) ^ 0x80000000) |
| 3353 | - 0x80000000); |
| 3354 | } |
| 3355 | |
| 3356 | /* |
| 3357 | * Generate a "jalr" instruction with a relocation hint to the called |
| 3358 | * function. This occurs in NewABI PIC code. |
| 3359 | */ |
| 3360 | static void |
| 3361 | macro_build_jalr (expressionS *ep) |
| 3362 | { |
| 3363 | char *f = NULL; |
| 3364 | |
| 3365 | if (HAVE_NEWABI) |
| 3366 | { |
| 3367 | frag_grow (8); |
| 3368 | f = frag_more (0); |
| 3369 | } |
| 3370 | macro_build (NULL, "jalr", "d,s", RA, PIC_CALL_REG); |
| 3371 | if (HAVE_NEWABI) |
| 3372 | fix_new_exp (frag_now, f - frag_now->fr_literal, |
| 3373 | 4, ep, FALSE, BFD_RELOC_MIPS_JALR); |
| 3374 | } |
| 3375 | |
| 3376 | /* |
| 3377 | * Generate a "lui" instruction. |
| 3378 | */ |
| 3379 | static void |
| 3380 | macro_build_lui (expressionS *ep, int regnum) |
| 3381 | { |
| 3382 | expressionS high_expr; |
| 3383 | const struct mips_opcode *mo; |
| 3384 | struct mips_cl_insn insn; |
| 3385 | bfd_reloc_code_real_type r[3] |
| 3386 | = {BFD_RELOC_UNUSED, BFD_RELOC_UNUSED, BFD_RELOC_UNUSED}; |
| 3387 | const char *name = "lui"; |
| 3388 | const char *fmt = "t,u"; |
| 3389 | |
| 3390 | assert (! mips_opts.mips16); |
| 3391 | |
| 3392 | high_expr = *ep; |
| 3393 | |
| 3394 | if (high_expr.X_op == O_constant) |
| 3395 | { |
| 3396 | /* we can compute the instruction now without a relocation entry */ |
| 3397 | high_expr.X_add_number = ((high_expr.X_add_number + 0x8000) |
| 3398 | >> 16) & 0xffff; |
| 3399 | *r = BFD_RELOC_UNUSED; |
| 3400 | } |
| 3401 | else |
| 3402 | { |
| 3403 | assert (ep->X_op == O_symbol); |
| 3404 | /* _gp_disp is a special case, used from s_cpload. |
| 3405 | __gnu_local_gp is used if mips_no_shared. */ |
| 3406 | assert (mips_pic == NO_PIC |
| 3407 | || (! HAVE_NEWABI |
| 3408 | && strcmp (S_GET_NAME (ep->X_add_symbol), "_gp_disp") == 0) |
| 3409 | || (! mips_in_shared |
| 3410 | && strcmp (S_GET_NAME (ep->X_add_symbol), |
| 3411 | "__gnu_local_gp") == 0)); |
| 3412 | *r = BFD_RELOC_HI16_S; |
| 3413 | } |
| 3414 | |
| 3415 | mo = hash_find (op_hash, name); |
| 3416 | assert (strcmp (name, mo->name) == 0); |
| 3417 | assert (strcmp (fmt, mo->args) == 0); |
| 3418 | create_insn (&insn, mo); |
| 3419 | |
| 3420 | insn.insn_opcode = insn.insn_mo->match; |
| 3421 | INSERT_OPERAND (RT, insn, regnum); |
| 3422 | if (*r == BFD_RELOC_UNUSED) |
| 3423 | { |
| 3424 | insn.insn_opcode |= high_expr.X_add_number; |
| 3425 | append_insn (&insn, NULL, r); |
| 3426 | } |
| 3427 | else |
| 3428 | append_insn (&insn, &high_expr, r); |
| 3429 | } |
| 3430 | |
| 3431 | /* Generate a sequence of instructions to do a load or store from a constant |
| 3432 | offset off of a base register (breg) into/from a target register (treg), |
| 3433 | using AT if necessary. */ |
| 3434 | static void |
| 3435 | macro_build_ldst_constoffset (expressionS *ep, const char *op, |
| 3436 | int treg, int breg, int dbl) |
| 3437 | { |
| 3438 | assert (ep->X_op == O_constant); |
| 3439 | |
| 3440 | /* Sign-extending 32-bit constants makes their handling easier. */ |
| 3441 | if (!dbl) |
| 3442 | normalize_constant_expr (ep); |
| 3443 | |
| 3444 | /* Right now, this routine can only handle signed 32-bit constants. */ |
| 3445 | if (! IS_SEXT_32BIT_NUM(ep->X_add_number + 0x8000)) |
| 3446 | as_warn (_("operand overflow")); |
| 3447 | |
| 3448 | if (IS_SEXT_16BIT_NUM(ep->X_add_number)) |
| 3449 | { |
| 3450 | /* Signed 16-bit offset will fit in the op. Easy! */ |
| 3451 | macro_build (ep, op, "t,o(b)", treg, BFD_RELOC_LO16, breg); |
| 3452 | } |
| 3453 | else |
| 3454 | { |
| 3455 | /* 32-bit offset, need multiple instructions and AT, like: |
| 3456 | lui $tempreg,const_hi (BFD_RELOC_HI16_S) |
| 3457 | addu $tempreg,$tempreg,$breg |
| 3458 | <op> $treg,const_lo($tempreg) (BFD_RELOC_LO16) |
| 3459 | to handle the complete offset. */ |
| 3460 | macro_build_lui (ep, AT); |
| 3461 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, AT, breg); |
| 3462 | macro_build (ep, op, "t,o(b)", treg, BFD_RELOC_LO16, AT); |
| 3463 | |
| 3464 | if (mips_opts.noat) |
| 3465 | as_bad (_("Macro used $at after \".set noat\"")); |
| 3466 | } |
| 3467 | } |
| 3468 | |
| 3469 | /* set_at() |
| 3470 | * Generates code to set the $at register to true (one) |
| 3471 | * if reg is less than the immediate expression. |
| 3472 | */ |
| 3473 | static void |
| 3474 | set_at (int reg, int unsignedp) |
| 3475 | { |
| 3476 | if (imm_expr.X_op == O_constant |
| 3477 | && imm_expr.X_add_number >= -0x8000 |
| 3478 | && imm_expr.X_add_number < 0x8000) |
| 3479 | macro_build (&imm_expr, unsignedp ? "sltiu" : "slti", "t,r,j", |
| 3480 | AT, reg, BFD_RELOC_LO16); |
| 3481 | else |
| 3482 | { |
| 3483 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 3484 | macro_build (NULL, unsignedp ? "sltu" : "slt", "d,v,t", AT, reg, AT); |
| 3485 | } |
| 3486 | } |
| 3487 | |
| 3488 | /* Warn if an expression is not a constant. */ |
| 3489 | |
| 3490 | static void |
| 3491 | check_absolute_expr (struct mips_cl_insn *ip, expressionS *ex) |
| 3492 | { |
| 3493 | if (ex->X_op == O_big) |
| 3494 | as_bad (_("unsupported large constant")); |
| 3495 | else if (ex->X_op != O_constant) |
| 3496 | as_bad (_("Instruction %s requires absolute expression"), |
| 3497 | ip->insn_mo->name); |
| 3498 | |
| 3499 | if (HAVE_32BIT_GPRS) |
| 3500 | normalize_constant_expr (ex); |
| 3501 | } |
| 3502 | |
| 3503 | /* Count the leading zeroes by performing a binary chop. This is a |
| 3504 | bulky bit of source, but performance is a LOT better for the |
| 3505 | majority of values than a simple loop to count the bits: |
| 3506 | for (lcnt = 0; (lcnt < 32); lcnt++) |
| 3507 | if ((v) & (1 << (31 - lcnt))) |
| 3508 | break; |
| 3509 | However it is not code size friendly, and the gain will drop a bit |
| 3510 | on certain cached systems. |
| 3511 | */ |
| 3512 | #define COUNT_TOP_ZEROES(v) \ |
| 3513 | (((v) & ~0xffff) == 0 \ |
| 3514 | ? ((v) & ~0xff) == 0 \ |
| 3515 | ? ((v) & ~0xf) == 0 \ |
| 3516 | ? ((v) & ~0x3) == 0 \ |
| 3517 | ? ((v) & ~0x1) == 0 \ |
| 3518 | ? !(v) \ |
| 3519 | ? 32 \ |
| 3520 | : 31 \ |
| 3521 | : 30 \ |
| 3522 | : ((v) & ~0x7) == 0 \ |
| 3523 | ? 29 \ |
| 3524 | : 28 \ |
| 3525 | : ((v) & ~0x3f) == 0 \ |
| 3526 | ? ((v) & ~0x1f) == 0 \ |
| 3527 | ? 27 \ |
| 3528 | : 26 \ |
| 3529 | : ((v) & ~0x7f) == 0 \ |
| 3530 | ? 25 \ |
| 3531 | : 24 \ |
| 3532 | : ((v) & ~0xfff) == 0 \ |
| 3533 | ? ((v) & ~0x3ff) == 0 \ |
| 3534 | ? ((v) & ~0x1ff) == 0 \ |
| 3535 | ? 23 \ |
| 3536 | : 22 \ |
| 3537 | : ((v) & ~0x7ff) == 0 \ |
| 3538 | ? 21 \ |
| 3539 | : 20 \ |
| 3540 | : ((v) & ~0x3fff) == 0 \ |
| 3541 | ? ((v) & ~0x1fff) == 0 \ |
| 3542 | ? 19 \ |
| 3543 | : 18 \ |
| 3544 | : ((v) & ~0x7fff) == 0 \ |
| 3545 | ? 17 \ |
| 3546 | : 16 \ |
| 3547 | : ((v) & ~0xffffff) == 0 \ |
| 3548 | ? ((v) & ~0xfffff) == 0 \ |
| 3549 | ? ((v) & ~0x3ffff) == 0 \ |
| 3550 | ? ((v) & ~0x1ffff) == 0 \ |
| 3551 | ? 15 \ |
| 3552 | : 14 \ |
| 3553 | : ((v) & ~0x7ffff) == 0 \ |
| 3554 | ? 13 \ |
| 3555 | : 12 \ |
| 3556 | : ((v) & ~0x3fffff) == 0 \ |
| 3557 | ? ((v) & ~0x1fffff) == 0 \ |
| 3558 | ? 11 \ |
| 3559 | : 10 \ |
| 3560 | : ((v) & ~0x7fffff) == 0 \ |
| 3561 | ? 9 \ |
| 3562 | : 8 \ |
| 3563 | : ((v) & ~0xfffffff) == 0 \ |
| 3564 | ? ((v) & ~0x3ffffff) == 0 \ |
| 3565 | ? ((v) & ~0x1ffffff) == 0 \ |
| 3566 | ? 7 \ |
| 3567 | : 6 \ |
| 3568 | : ((v) & ~0x7ffffff) == 0 \ |
| 3569 | ? 5 \ |
| 3570 | : 4 \ |
| 3571 | : ((v) & ~0x3fffffff) == 0 \ |
| 3572 | ? ((v) & ~0x1fffffff) == 0 \ |
| 3573 | ? 3 \ |
| 3574 | : 2 \ |
| 3575 | : ((v) & ~0x7fffffff) == 0 \ |
| 3576 | ? 1 \ |
| 3577 | : 0) |
| 3578 | |
| 3579 | /* load_register() |
| 3580 | * This routine generates the least number of instructions necessary to load |
| 3581 | * an absolute expression value into a register. |
| 3582 | */ |
| 3583 | static void |
| 3584 | load_register (int reg, expressionS *ep, int dbl) |
| 3585 | { |
| 3586 | int freg; |
| 3587 | expressionS hi32, lo32; |
| 3588 | |
| 3589 | if (ep->X_op != O_big) |
| 3590 | { |
| 3591 | assert (ep->X_op == O_constant); |
| 3592 | |
| 3593 | /* Sign-extending 32-bit constants makes their handling easier. */ |
| 3594 | if (!dbl) |
| 3595 | normalize_constant_expr (ep); |
| 3596 | |
| 3597 | if (IS_SEXT_16BIT_NUM (ep->X_add_number)) |
| 3598 | { |
| 3599 | /* We can handle 16 bit signed values with an addiu to |
| 3600 | $zero. No need to ever use daddiu here, since $zero and |
| 3601 | the result are always correct in 32 bit mode. */ |
| 3602 | macro_build (ep, "addiu", "t,r,j", reg, 0, BFD_RELOC_LO16); |
| 3603 | return; |
| 3604 | } |
| 3605 | else if (ep->X_add_number >= 0 && ep->X_add_number < 0x10000) |
| 3606 | { |
| 3607 | /* We can handle 16 bit unsigned values with an ori to |
| 3608 | $zero. */ |
| 3609 | macro_build (ep, "ori", "t,r,i", reg, 0, BFD_RELOC_LO16); |
| 3610 | return; |
| 3611 | } |
| 3612 | else if ((IS_SEXT_32BIT_NUM (ep->X_add_number))) |
| 3613 | { |
| 3614 | /* 32 bit values require an lui. */ |
| 3615 | macro_build (ep, "lui", "t,u", reg, BFD_RELOC_HI16); |
| 3616 | if ((ep->X_add_number & 0xffff) != 0) |
| 3617 | macro_build (ep, "ori", "t,r,i", reg, reg, BFD_RELOC_LO16); |
| 3618 | return; |
| 3619 | } |
| 3620 | } |
| 3621 | |
| 3622 | /* The value is larger than 32 bits. */ |
| 3623 | |
| 3624 | if (!dbl || HAVE_32BIT_GPRS) |
| 3625 | { |
| 3626 | char value[32]; |
| 3627 | |
| 3628 | sprintf_vma (value, ep->X_add_number); |
| 3629 | as_bad (_("Number (0x%s) larger than 32 bits"), value); |
| 3630 | macro_build (ep, "addiu", "t,r,j", reg, 0, BFD_RELOC_LO16); |
| 3631 | return; |
| 3632 | } |
| 3633 | |
| 3634 | if (ep->X_op != O_big) |
| 3635 | { |
| 3636 | hi32 = *ep; |
| 3637 | hi32.X_add_number = (valueT) hi32.X_add_number >> 16; |
| 3638 | hi32.X_add_number = (valueT) hi32.X_add_number >> 16; |
| 3639 | hi32.X_add_number &= 0xffffffff; |
| 3640 | lo32 = *ep; |
| 3641 | lo32.X_add_number &= 0xffffffff; |
| 3642 | } |
| 3643 | else |
| 3644 | { |
| 3645 | assert (ep->X_add_number > 2); |
| 3646 | if (ep->X_add_number == 3) |
| 3647 | generic_bignum[3] = 0; |
| 3648 | else if (ep->X_add_number > 4) |
| 3649 | as_bad (_("Number larger than 64 bits")); |
| 3650 | lo32.X_op = O_constant; |
| 3651 | lo32.X_add_number = generic_bignum[0] + (generic_bignum[1] << 16); |
| 3652 | hi32.X_op = O_constant; |
| 3653 | hi32.X_add_number = generic_bignum[2] + (generic_bignum[3] << 16); |
| 3654 | } |
| 3655 | |
| 3656 | if (hi32.X_add_number == 0) |
| 3657 | freg = 0; |
| 3658 | else |
| 3659 | { |
| 3660 | int shift, bit; |
| 3661 | unsigned long hi, lo; |
| 3662 | |
| 3663 | if (hi32.X_add_number == (offsetT) 0xffffffff) |
| 3664 | { |
| 3665 | if ((lo32.X_add_number & 0xffff8000) == 0xffff8000) |
| 3666 | { |
| 3667 | macro_build (&lo32, "addiu", "t,r,j", reg, 0, BFD_RELOC_LO16); |
| 3668 | return; |
| 3669 | } |
| 3670 | if (lo32.X_add_number & 0x80000000) |
| 3671 | { |
| 3672 | macro_build (&lo32, "lui", "t,u", reg, BFD_RELOC_HI16); |
| 3673 | if (lo32.X_add_number & 0xffff) |
| 3674 | macro_build (&lo32, "ori", "t,r,i", reg, reg, BFD_RELOC_LO16); |
| 3675 | return; |
| 3676 | } |
| 3677 | } |
| 3678 | |
| 3679 | /* Check for 16bit shifted constant. We know that hi32 is |
| 3680 | non-zero, so start the mask on the first bit of the hi32 |
| 3681 | value. */ |
| 3682 | shift = 17; |
| 3683 | do |
| 3684 | { |
| 3685 | unsigned long himask, lomask; |
| 3686 | |
| 3687 | if (shift < 32) |
| 3688 | { |
| 3689 | himask = 0xffff >> (32 - shift); |
| 3690 | lomask = (0xffff << shift) & 0xffffffff; |
| 3691 | } |
| 3692 | else |
| 3693 | { |
| 3694 | himask = 0xffff << (shift - 32); |
| 3695 | lomask = 0; |
| 3696 | } |
| 3697 | if ((hi32.X_add_number & ~(offsetT) himask) == 0 |
| 3698 | && (lo32.X_add_number & ~(offsetT) lomask) == 0) |
| 3699 | { |
| 3700 | expressionS tmp; |
| 3701 | |
| 3702 | tmp.X_op = O_constant; |
| 3703 | if (shift < 32) |
| 3704 | tmp.X_add_number = ((hi32.X_add_number << (32 - shift)) |
| 3705 | | (lo32.X_add_number >> shift)); |
| 3706 | else |
| 3707 | tmp.X_add_number = hi32.X_add_number >> (shift - 32); |
| 3708 | macro_build (&tmp, "ori", "t,r,i", reg, 0, BFD_RELOC_LO16); |
| 3709 | macro_build (NULL, (shift >= 32) ? "dsll32" : "dsll", "d,w,<", |
| 3710 | reg, reg, (shift >= 32) ? shift - 32 : shift); |
| 3711 | return; |
| 3712 | } |
| 3713 | ++shift; |
| 3714 | } |
| 3715 | while (shift <= (64 - 16)); |
| 3716 | |
| 3717 | /* Find the bit number of the lowest one bit, and store the |
| 3718 | shifted value in hi/lo. */ |
| 3719 | hi = (unsigned long) (hi32.X_add_number & 0xffffffff); |
| 3720 | lo = (unsigned long) (lo32.X_add_number & 0xffffffff); |
| 3721 | if (lo != 0) |
| 3722 | { |
| 3723 | bit = 0; |
| 3724 | while ((lo & 1) == 0) |
| 3725 | { |
| 3726 | lo >>= 1; |
| 3727 | ++bit; |
| 3728 | } |
| 3729 | lo |= (hi & (((unsigned long) 1 << bit) - 1)) << (32 - bit); |
| 3730 | hi >>= bit; |
| 3731 | } |
| 3732 | else |
| 3733 | { |
| 3734 | bit = 32; |
| 3735 | while ((hi & 1) == 0) |
| 3736 | { |
| 3737 | hi >>= 1; |
| 3738 | ++bit; |
| 3739 | } |
| 3740 | lo = hi; |
| 3741 | hi = 0; |
| 3742 | } |
| 3743 | |
| 3744 | /* Optimize if the shifted value is a (power of 2) - 1. */ |
| 3745 | if ((hi == 0 && ((lo + 1) & lo) == 0) |
| 3746 | || (lo == 0xffffffff && ((hi + 1) & hi) == 0)) |
| 3747 | { |
| 3748 | shift = COUNT_TOP_ZEROES ((unsigned int) hi32.X_add_number); |
| 3749 | if (shift != 0) |
| 3750 | { |
| 3751 | expressionS tmp; |
| 3752 | |
| 3753 | /* This instruction will set the register to be all |
| 3754 | ones. */ |
| 3755 | tmp.X_op = O_constant; |
| 3756 | tmp.X_add_number = (offsetT) -1; |
| 3757 | macro_build (&tmp, "addiu", "t,r,j", reg, 0, BFD_RELOC_LO16); |
| 3758 | if (bit != 0) |
| 3759 | { |
| 3760 | bit += shift; |
| 3761 | macro_build (NULL, (bit >= 32) ? "dsll32" : "dsll", "d,w,<", |
| 3762 | reg, reg, (bit >= 32) ? bit - 32 : bit); |
| 3763 | } |
| 3764 | macro_build (NULL, (shift >= 32) ? "dsrl32" : "dsrl", "d,w,<", |
| 3765 | reg, reg, (shift >= 32) ? shift - 32 : shift); |
| 3766 | return; |
| 3767 | } |
| 3768 | } |
| 3769 | |
| 3770 | /* Sign extend hi32 before calling load_register, because we can |
| 3771 | generally get better code when we load a sign extended value. */ |
| 3772 | if ((hi32.X_add_number & 0x80000000) != 0) |
| 3773 | hi32.X_add_number |= ~(offsetT) 0xffffffff; |
| 3774 | load_register (reg, &hi32, 0); |
| 3775 | freg = reg; |
| 3776 | } |
| 3777 | if ((lo32.X_add_number & 0xffff0000) == 0) |
| 3778 | { |
| 3779 | if (freg != 0) |
| 3780 | { |
| 3781 | macro_build (NULL, "dsll32", "d,w,<", reg, freg, 0); |
| 3782 | freg = reg; |
| 3783 | } |
| 3784 | } |
| 3785 | else |
| 3786 | { |
| 3787 | expressionS mid16; |
| 3788 | |
| 3789 | if ((freg == 0) && (lo32.X_add_number == (offsetT) 0xffffffff)) |
| 3790 | { |
| 3791 | macro_build (&lo32, "lui", "t,u", reg, BFD_RELOC_HI16); |
| 3792 | macro_build (NULL, "dsrl32", "d,w,<", reg, reg, 0); |
| 3793 | return; |
| 3794 | } |
| 3795 | |
| 3796 | if (freg != 0) |
| 3797 | { |
| 3798 | macro_build (NULL, "dsll", "d,w,<", reg, freg, 16); |
| 3799 | freg = reg; |
| 3800 | } |
| 3801 | mid16 = lo32; |
| 3802 | mid16.X_add_number >>= 16; |
| 3803 | macro_build (&mid16, "ori", "t,r,i", reg, freg, BFD_RELOC_LO16); |
| 3804 | macro_build (NULL, "dsll", "d,w,<", reg, reg, 16); |
| 3805 | freg = reg; |
| 3806 | } |
| 3807 | if ((lo32.X_add_number & 0xffff) != 0) |
| 3808 | macro_build (&lo32, "ori", "t,r,i", reg, freg, BFD_RELOC_LO16); |
| 3809 | } |
| 3810 | |
| 3811 | static inline void |
| 3812 | load_delay_nop (void) |
| 3813 | { |
| 3814 | if (!gpr_interlocks) |
| 3815 | macro_build (NULL, "nop", ""); |
| 3816 | } |
| 3817 | |
| 3818 | /* Load an address into a register. */ |
| 3819 | |
| 3820 | static void |
| 3821 | load_address (int reg, expressionS *ep, int *used_at) |
| 3822 | { |
| 3823 | if (ep->X_op != O_constant |
| 3824 | && ep->X_op != O_symbol) |
| 3825 | { |
| 3826 | as_bad (_("expression too complex")); |
| 3827 | ep->X_op = O_constant; |
| 3828 | } |
| 3829 | |
| 3830 | if (ep->X_op == O_constant) |
| 3831 | { |
| 3832 | load_register (reg, ep, HAVE_64BIT_ADDRESSES); |
| 3833 | return; |
| 3834 | } |
| 3835 | |
| 3836 | if (mips_pic == NO_PIC) |
| 3837 | { |
| 3838 | /* If this is a reference to a GP relative symbol, we want |
| 3839 | addiu $reg,$gp,<sym> (BFD_RELOC_GPREL16) |
| 3840 | Otherwise we want |
| 3841 | lui $reg,<sym> (BFD_RELOC_HI16_S) |
| 3842 | addiu $reg,$reg,<sym> (BFD_RELOC_LO16) |
| 3843 | If we have an addend, we always use the latter form. |
| 3844 | |
| 3845 | With 64bit address space and a usable $at we want |
| 3846 | lui $reg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 3847 | lui $at,<sym> (BFD_RELOC_HI16_S) |
| 3848 | daddiu $reg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 3849 | daddiu $at,<sym> (BFD_RELOC_LO16) |
| 3850 | dsll32 $reg,0 |
| 3851 | daddu $reg,$reg,$at |
| 3852 | |
| 3853 | If $at is already in use, we use a path which is suboptimal |
| 3854 | on superscalar processors. |
| 3855 | lui $reg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 3856 | daddiu $reg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 3857 | dsll $reg,16 |
| 3858 | daddiu $reg,<sym> (BFD_RELOC_HI16_S) |
| 3859 | dsll $reg,16 |
| 3860 | daddiu $reg,<sym> (BFD_RELOC_LO16) |
| 3861 | |
| 3862 | For GP relative symbols in 64bit address space we can use |
| 3863 | the same sequence as in 32bit address space. */ |
| 3864 | if (HAVE_64BIT_SYMBOLS) |
| 3865 | { |
| 3866 | if ((valueT) ep->X_add_number <= MAX_GPREL_OFFSET |
| 3867 | && !nopic_need_relax (ep->X_add_symbol, 1)) |
| 3868 | { |
| 3869 | relax_start (ep->X_add_symbol); |
| 3870 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", reg, |
| 3871 | mips_gp_register, BFD_RELOC_GPREL16); |
| 3872 | relax_switch (); |
| 3873 | } |
| 3874 | |
| 3875 | if (*used_at == 0 && !mips_opts.noat) |
| 3876 | { |
| 3877 | macro_build (ep, "lui", "t,u", reg, BFD_RELOC_MIPS_HIGHEST); |
| 3878 | macro_build (ep, "lui", "t,u", AT, BFD_RELOC_HI16_S); |
| 3879 | macro_build (ep, "daddiu", "t,r,j", reg, reg, |
| 3880 | BFD_RELOC_MIPS_HIGHER); |
| 3881 | macro_build (ep, "daddiu", "t,r,j", AT, AT, BFD_RELOC_LO16); |
| 3882 | macro_build (NULL, "dsll32", "d,w,<", reg, reg, 0); |
| 3883 | macro_build (NULL, "daddu", "d,v,t", reg, reg, AT); |
| 3884 | *used_at = 1; |
| 3885 | } |
| 3886 | else |
| 3887 | { |
| 3888 | macro_build (ep, "lui", "t,u", reg, BFD_RELOC_MIPS_HIGHEST); |
| 3889 | macro_build (ep, "daddiu", "t,r,j", reg, reg, |
| 3890 | BFD_RELOC_MIPS_HIGHER); |
| 3891 | macro_build (NULL, "dsll", "d,w,<", reg, reg, 16); |
| 3892 | macro_build (ep, "daddiu", "t,r,j", reg, reg, BFD_RELOC_HI16_S); |
| 3893 | macro_build (NULL, "dsll", "d,w,<", reg, reg, 16); |
| 3894 | macro_build (ep, "daddiu", "t,r,j", reg, reg, BFD_RELOC_LO16); |
| 3895 | } |
| 3896 | |
| 3897 | if (mips_relax.sequence) |
| 3898 | relax_end (); |
| 3899 | } |
| 3900 | else |
| 3901 | { |
| 3902 | if ((valueT) ep->X_add_number <= MAX_GPREL_OFFSET |
| 3903 | && !nopic_need_relax (ep->X_add_symbol, 1)) |
| 3904 | { |
| 3905 | relax_start (ep->X_add_symbol); |
| 3906 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", reg, |
| 3907 | mips_gp_register, BFD_RELOC_GPREL16); |
| 3908 | relax_switch (); |
| 3909 | } |
| 3910 | macro_build_lui (ep, reg); |
| 3911 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", |
| 3912 | reg, reg, BFD_RELOC_LO16); |
| 3913 | if (mips_relax.sequence) |
| 3914 | relax_end (); |
| 3915 | } |
| 3916 | } |
| 3917 | else if (!mips_big_got) |
| 3918 | { |
| 3919 | expressionS ex; |
| 3920 | |
| 3921 | /* If this is a reference to an external symbol, we want |
| 3922 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 3923 | Otherwise we want |
| 3924 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 3925 | nop |
| 3926 | addiu $reg,$reg,<sym> (BFD_RELOC_LO16) |
| 3927 | If there is a constant, it must be added in after. |
| 3928 | |
| 3929 | If we have NewABI, we want |
| 3930 | lw $reg,<sym+cst>($gp) (BFD_RELOC_MIPS_GOT_DISP) |
| 3931 | unless we're referencing a global symbol with a non-zero |
| 3932 | offset, in which case cst must be added separately. */ |
| 3933 | if (HAVE_NEWABI) |
| 3934 | { |
| 3935 | if (ep->X_add_number) |
| 3936 | { |
| 3937 | ex.X_add_number = ep->X_add_number; |
| 3938 | ep->X_add_number = 0; |
| 3939 | relax_start (ep->X_add_symbol); |
| 3940 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", reg, |
| 3941 | BFD_RELOC_MIPS_GOT_DISP, mips_gp_register); |
| 3942 | if (ex.X_add_number < -0x8000 || ex.X_add_number >= 0x8000) |
| 3943 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 3944 | ex.X_op = O_constant; |
| 3945 | macro_build (&ex, ADDRESS_ADDI_INSN, "t,r,j", |
| 3946 | reg, reg, BFD_RELOC_LO16); |
| 3947 | ep->X_add_number = ex.X_add_number; |
| 3948 | relax_switch (); |
| 3949 | } |
| 3950 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", reg, |
| 3951 | BFD_RELOC_MIPS_GOT_DISP, mips_gp_register); |
| 3952 | if (mips_relax.sequence) |
| 3953 | relax_end (); |
| 3954 | } |
| 3955 | else |
| 3956 | { |
| 3957 | ex.X_add_number = ep->X_add_number; |
| 3958 | ep->X_add_number = 0; |
| 3959 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", reg, |
| 3960 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 3961 | load_delay_nop (); |
| 3962 | relax_start (ep->X_add_symbol); |
| 3963 | relax_switch (); |
| 3964 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", reg, reg, |
| 3965 | BFD_RELOC_LO16); |
| 3966 | relax_end (); |
| 3967 | |
| 3968 | if (ex.X_add_number != 0) |
| 3969 | { |
| 3970 | if (ex.X_add_number < -0x8000 || ex.X_add_number >= 0x8000) |
| 3971 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 3972 | ex.X_op = O_constant; |
| 3973 | macro_build (&ex, ADDRESS_ADDI_INSN, "t,r,j", |
| 3974 | reg, reg, BFD_RELOC_LO16); |
| 3975 | } |
| 3976 | } |
| 3977 | } |
| 3978 | else if (mips_big_got) |
| 3979 | { |
| 3980 | expressionS ex; |
| 3981 | |
| 3982 | /* This is the large GOT case. If this is a reference to an |
| 3983 | external symbol, we want |
| 3984 | lui $reg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 3985 | addu $reg,$reg,$gp |
| 3986 | lw $reg,<sym>($reg) (BFD_RELOC_MIPS_GOT_LO16) |
| 3987 | |
| 3988 | Otherwise, for a reference to a local symbol in old ABI, we want |
| 3989 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 3990 | nop |
| 3991 | addiu $reg,$reg,<sym> (BFD_RELOC_LO16) |
| 3992 | If there is a constant, it must be added in after. |
| 3993 | |
| 3994 | In the NewABI, for local symbols, with or without offsets, we want: |
| 3995 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT_PAGE) |
| 3996 | addiu $reg,$reg,<sym> (BFD_RELOC_MIPS_GOT_OFST) |
| 3997 | */ |
| 3998 | if (HAVE_NEWABI) |
| 3999 | { |
| 4000 | ex.X_add_number = ep->X_add_number; |
| 4001 | ep->X_add_number = 0; |
| 4002 | relax_start (ep->X_add_symbol); |
| 4003 | macro_build (ep, "lui", "t,u", reg, BFD_RELOC_MIPS_GOT_HI16); |
| 4004 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 4005 | reg, reg, mips_gp_register); |
| 4006 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", |
| 4007 | reg, BFD_RELOC_MIPS_GOT_LO16, reg); |
| 4008 | if (ex.X_add_number < -0x8000 || ex.X_add_number >= 0x8000) |
| 4009 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 4010 | else if (ex.X_add_number) |
| 4011 | { |
| 4012 | ex.X_op = O_constant; |
| 4013 | macro_build (&ex, ADDRESS_ADDI_INSN, "t,r,j", reg, reg, |
| 4014 | BFD_RELOC_LO16); |
| 4015 | } |
| 4016 | |
| 4017 | ep->X_add_number = ex.X_add_number; |
| 4018 | relax_switch (); |
| 4019 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", reg, |
| 4020 | BFD_RELOC_MIPS_GOT_PAGE, mips_gp_register); |
| 4021 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", reg, reg, |
| 4022 | BFD_RELOC_MIPS_GOT_OFST); |
| 4023 | relax_end (); |
| 4024 | } |
| 4025 | else |
| 4026 | { |
| 4027 | ex.X_add_number = ep->X_add_number; |
| 4028 | ep->X_add_number = 0; |
| 4029 | relax_start (ep->X_add_symbol); |
| 4030 | macro_build (ep, "lui", "t,u", reg, BFD_RELOC_MIPS_GOT_HI16); |
| 4031 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 4032 | reg, reg, mips_gp_register); |
| 4033 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", |
| 4034 | reg, BFD_RELOC_MIPS_GOT_LO16, reg); |
| 4035 | relax_switch (); |
| 4036 | if (reg_needs_delay (mips_gp_register)) |
| 4037 | { |
| 4038 | /* We need a nop before loading from $gp. This special |
| 4039 | check is required because the lui which starts the main |
| 4040 | instruction stream does not refer to $gp, and so will not |
| 4041 | insert the nop which may be required. */ |
| 4042 | macro_build (NULL, "nop", ""); |
| 4043 | } |
| 4044 | macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", reg, |
| 4045 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 4046 | load_delay_nop (); |
| 4047 | macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", reg, reg, |
| 4048 | BFD_RELOC_LO16); |
| 4049 | relax_end (); |
| 4050 | |
| 4051 | if (ex.X_add_number != 0) |
| 4052 | { |
| 4053 | if (ex.X_add_number < -0x8000 || ex.X_add_number >= 0x8000) |
| 4054 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 4055 | ex.X_op = O_constant; |
| 4056 | macro_build (&ex, ADDRESS_ADDI_INSN, "t,r,j", reg, reg, |
| 4057 | BFD_RELOC_LO16); |
| 4058 | } |
| 4059 | } |
| 4060 | } |
| 4061 | else |
| 4062 | abort (); |
| 4063 | |
| 4064 | if (mips_opts.noat && *used_at == 1) |
| 4065 | as_bad (_("Macro used $at after \".set noat\"")); |
| 4066 | } |
| 4067 | |
| 4068 | /* Move the contents of register SOURCE into register DEST. */ |
| 4069 | |
| 4070 | static void |
| 4071 | move_register (int dest, int source) |
| 4072 | { |
| 4073 | macro_build (NULL, HAVE_32BIT_GPRS ? "addu" : "daddu", "d,v,t", |
| 4074 | dest, source, 0); |
| 4075 | } |
| 4076 | |
| 4077 | /* Emit an SVR4 PIC sequence to load address LOCAL into DEST, where |
| 4078 | LOCAL is the sum of a symbol and a 16-bit or 32-bit displacement. |
| 4079 | The two alternatives are: |
| 4080 | |
| 4081 | Global symbol Local sybmol |
| 4082 | ------------- ------------ |
| 4083 | lw DEST,%got(SYMBOL) lw DEST,%got(SYMBOL + OFFSET) |
| 4084 | ... ... |
| 4085 | addiu DEST,DEST,OFFSET addiu DEST,DEST,%lo(SYMBOL + OFFSET) |
| 4086 | |
| 4087 | load_got_offset emits the first instruction and add_got_offset |
| 4088 | emits the second for a 16-bit offset or add_got_offset_hilo emits |
| 4089 | a sequence to add a 32-bit offset using a scratch register. */ |
| 4090 | |
| 4091 | static void |
| 4092 | load_got_offset (int dest, expressionS *local) |
| 4093 | { |
| 4094 | expressionS global; |
| 4095 | |
| 4096 | global = *local; |
| 4097 | global.X_add_number = 0; |
| 4098 | |
| 4099 | relax_start (local->X_add_symbol); |
| 4100 | macro_build (&global, ADDRESS_LOAD_INSN, "t,o(b)", dest, |
| 4101 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 4102 | relax_switch (); |
| 4103 | macro_build (local, ADDRESS_LOAD_INSN, "t,o(b)", dest, |
| 4104 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 4105 | relax_end (); |
| 4106 | } |
| 4107 | |
| 4108 | static void |
| 4109 | add_got_offset (int dest, expressionS *local) |
| 4110 | { |
| 4111 | expressionS global; |
| 4112 | |
| 4113 | global.X_op = O_constant; |
| 4114 | global.X_op_symbol = NULL; |
| 4115 | global.X_add_symbol = NULL; |
| 4116 | global.X_add_number = local->X_add_number; |
| 4117 | |
| 4118 | relax_start (local->X_add_symbol); |
| 4119 | macro_build (&global, ADDRESS_ADDI_INSN, "t,r,j", |
| 4120 | dest, dest, BFD_RELOC_LO16); |
| 4121 | relax_switch (); |
| 4122 | macro_build (local, ADDRESS_ADDI_INSN, "t,r,j", dest, dest, BFD_RELOC_LO16); |
| 4123 | relax_end (); |
| 4124 | } |
| 4125 | |
| 4126 | static void |
| 4127 | add_got_offset_hilo (int dest, expressionS *local, int tmp) |
| 4128 | { |
| 4129 | expressionS global; |
| 4130 | int hold_mips_optimize; |
| 4131 | |
| 4132 | global.X_op = O_constant; |
| 4133 | global.X_op_symbol = NULL; |
| 4134 | global.X_add_symbol = NULL; |
| 4135 | global.X_add_number = local->X_add_number; |
| 4136 | |
| 4137 | relax_start (local->X_add_symbol); |
| 4138 | load_register (tmp, &global, HAVE_64BIT_ADDRESSES); |
| 4139 | relax_switch (); |
| 4140 | /* Set mips_optimize around the lui instruction to avoid |
| 4141 | inserting an unnecessary nop after the lw. */ |
| 4142 | hold_mips_optimize = mips_optimize; |
| 4143 | mips_optimize = 2; |
| 4144 | macro_build_lui (&global, tmp); |
| 4145 | mips_optimize = hold_mips_optimize; |
| 4146 | macro_build (local, ADDRESS_ADDI_INSN, "t,r,j", tmp, tmp, BFD_RELOC_LO16); |
| 4147 | relax_end (); |
| 4148 | |
| 4149 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", dest, dest, tmp); |
| 4150 | } |
| 4151 | |
| 4152 | /* |
| 4153 | * Build macros |
| 4154 | * This routine implements the seemingly endless macro or synthesized |
| 4155 | * instructions and addressing modes in the mips assembly language. Many |
| 4156 | * of these macros are simple and are similar to each other. These could |
| 4157 | * probably be handled by some kind of table or grammar approach instead of |
| 4158 | * this verbose method. Others are not simple macros but are more like |
| 4159 | * optimizing code generation. |
| 4160 | * One interesting optimization is when several store macros appear |
| 4161 | * consecutively that would load AT with the upper half of the same address. |
| 4162 | * The ensuing load upper instructions are ommited. This implies some kind |
| 4163 | * of global optimization. We currently only optimize within a single macro. |
| 4164 | * For many of the load and store macros if the address is specified as a |
| 4165 | * constant expression in the first 64k of memory (ie ld $2,0x4000c) we |
| 4166 | * first load register 'at' with zero and use it as the base register. The |
| 4167 | * mips assembler simply uses register $zero. Just one tiny optimization |
| 4168 | * we're missing. |
| 4169 | */ |
| 4170 | static void |
| 4171 | macro (struct mips_cl_insn *ip) |
| 4172 | { |
| 4173 | register int treg, sreg, dreg, breg; |
| 4174 | int tempreg; |
| 4175 | int mask; |
| 4176 | int used_at = 0; |
| 4177 | expressionS expr1; |
| 4178 | const char *s; |
| 4179 | const char *s2; |
| 4180 | const char *fmt; |
| 4181 | int likely = 0; |
| 4182 | int dbl = 0; |
| 4183 | int coproc = 0; |
| 4184 | int lr = 0; |
| 4185 | int imm = 0; |
| 4186 | int call = 0; |
| 4187 | int off; |
| 4188 | offsetT maxnum; |
| 4189 | bfd_reloc_code_real_type r; |
| 4190 | int hold_mips_optimize; |
| 4191 | |
| 4192 | assert (! mips_opts.mips16); |
| 4193 | |
| 4194 | treg = (ip->insn_opcode >> 16) & 0x1f; |
| 4195 | dreg = (ip->insn_opcode >> 11) & 0x1f; |
| 4196 | sreg = breg = (ip->insn_opcode >> 21) & 0x1f; |
| 4197 | mask = ip->insn_mo->mask; |
| 4198 | |
| 4199 | expr1.X_op = O_constant; |
| 4200 | expr1.X_op_symbol = NULL; |
| 4201 | expr1.X_add_symbol = NULL; |
| 4202 | expr1.X_add_number = 1; |
| 4203 | |
| 4204 | switch (mask) |
| 4205 | { |
| 4206 | case M_DABS: |
| 4207 | dbl = 1; |
| 4208 | case M_ABS: |
| 4209 | /* bgez $a0,.+12 |
| 4210 | move v0,$a0 |
| 4211 | sub v0,$zero,$a0 |
| 4212 | */ |
| 4213 | |
| 4214 | start_noreorder (); |
| 4215 | |
| 4216 | expr1.X_add_number = 8; |
| 4217 | macro_build (&expr1, "bgez", "s,p", sreg); |
| 4218 | if (dreg == sreg) |
| 4219 | macro_build (NULL, "nop", "", 0); |
| 4220 | else |
| 4221 | move_register (dreg, sreg); |
| 4222 | macro_build (NULL, dbl ? "dsub" : "sub", "d,v,t", dreg, 0, sreg); |
| 4223 | |
| 4224 | end_noreorder (); |
| 4225 | break; |
| 4226 | |
| 4227 | case M_ADD_I: |
| 4228 | s = "addi"; |
| 4229 | s2 = "add"; |
| 4230 | goto do_addi; |
| 4231 | case M_ADDU_I: |
| 4232 | s = "addiu"; |
| 4233 | s2 = "addu"; |
| 4234 | goto do_addi; |
| 4235 | case M_DADD_I: |
| 4236 | dbl = 1; |
| 4237 | s = "daddi"; |
| 4238 | s2 = "dadd"; |
| 4239 | goto do_addi; |
| 4240 | case M_DADDU_I: |
| 4241 | dbl = 1; |
| 4242 | s = "daddiu"; |
| 4243 | s2 = "daddu"; |
| 4244 | do_addi: |
| 4245 | if (imm_expr.X_op == O_constant |
| 4246 | && imm_expr.X_add_number >= -0x8000 |
| 4247 | && imm_expr.X_add_number < 0x8000) |
| 4248 | { |
| 4249 | macro_build (&imm_expr, s, "t,r,j", treg, sreg, BFD_RELOC_LO16); |
| 4250 | break; |
| 4251 | } |
| 4252 | used_at = 1; |
| 4253 | load_register (AT, &imm_expr, dbl); |
| 4254 | macro_build (NULL, s2, "d,v,t", treg, sreg, AT); |
| 4255 | break; |
| 4256 | |
| 4257 | case M_AND_I: |
| 4258 | s = "andi"; |
| 4259 | s2 = "and"; |
| 4260 | goto do_bit; |
| 4261 | case M_OR_I: |
| 4262 | s = "ori"; |
| 4263 | s2 = "or"; |
| 4264 | goto do_bit; |
| 4265 | case M_NOR_I: |
| 4266 | s = ""; |
| 4267 | s2 = "nor"; |
| 4268 | goto do_bit; |
| 4269 | case M_XOR_I: |
| 4270 | s = "xori"; |
| 4271 | s2 = "xor"; |
| 4272 | do_bit: |
| 4273 | if (imm_expr.X_op == O_constant |
| 4274 | && imm_expr.X_add_number >= 0 |
| 4275 | && imm_expr.X_add_number < 0x10000) |
| 4276 | { |
| 4277 | if (mask != M_NOR_I) |
| 4278 | macro_build (&imm_expr, s, "t,r,i", treg, sreg, BFD_RELOC_LO16); |
| 4279 | else |
| 4280 | { |
| 4281 | macro_build (&imm_expr, "ori", "t,r,i", |
| 4282 | treg, sreg, BFD_RELOC_LO16); |
| 4283 | macro_build (NULL, "nor", "d,v,t", treg, treg, 0); |
| 4284 | } |
| 4285 | break; |
| 4286 | } |
| 4287 | |
| 4288 | used_at = 1; |
| 4289 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 4290 | macro_build (NULL, s2, "d,v,t", treg, sreg, AT); |
| 4291 | break; |
| 4292 | |
| 4293 | case M_BEQ_I: |
| 4294 | s = "beq"; |
| 4295 | goto beq_i; |
| 4296 | case M_BEQL_I: |
| 4297 | s = "beql"; |
| 4298 | likely = 1; |
| 4299 | goto beq_i; |
| 4300 | case M_BNE_I: |
| 4301 | s = "bne"; |
| 4302 | goto beq_i; |
| 4303 | case M_BNEL_I: |
| 4304 | s = "bnel"; |
| 4305 | likely = 1; |
| 4306 | beq_i: |
| 4307 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 0) |
| 4308 | { |
| 4309 | macro_build (&offset_expr, s, "s,t,p", sreg, 0); |
| 4310 | break; |
| 4311 | } |
| 4312 | used_at = 1; |
| 4313 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 4314 | macro_build (&offset_expr, s, "s,t,p", sreg, AT); |
| 4315 | break; |
| 4316 | |
| 4317 | case M_BGEL: |
| 4318 | likely = 1; |
| 4319 | case M_BGE: |
| 4320 | if (treg == 0) |
| 4321 | { |
| 4322 | macro_build (&offset_expr, likely ? "bgezl" : "bgez", "s,p", sreg); |
| 4323 | break; |
| 4324 | } |
| 4325 | if (sreg == 0) |
| 4326 | { |
| 4327 | macro_build (&offset_expr, likely ? "blezl" : "blez", "s,p", treg); |
| 4328 | break; |
| 4329 | } |
| 4330 | used_at = 1; |
| 4331 | macro_build (NULL, "slt", "d,v,t", AT, sreg, treg); |
| 4332 | macro_build (&offset_expr, likely ? "beql" : "beq", "s,t,p", AT, 0); |
| 4333 | break; |
| 4334 | |
| 4335 | case M_BGTL_I: |
| 4336 | likely = 1; |
| 4337 | case M_BGT_I: |
| 4338 | /* check for > max integer */ |
| 4339 | maxnum = 0x7fffffff; |
| 4340 | if (HAVE_64BIT_GPRS && sizeof (maxnum) > 4) |
| 4341 | { |
| 4342 | maxnum <<= 16; |
| 4343 | maxnum |= 0xffff; |
| 4344 | maxnum <<= 16; |
| 4345 | maxnum |= 0xffff; |
| 4346 | } |
| 4347 | if (imm_expr.X_op == O_constant |
| 4348 | && imm_expr.X_add_number >= maxnum |
| 4349 | && (HAVE_32BIT_GPRS || sizeof (maxnum) > 4)) |
| 4350 | { |
| 4351 | do_false: |
| 4352 | /* result is always false */ |
| 4353 | if (! likely) |
| 4354 | macro_build (NULL, "nop", "", 0); |
| 4355 | else |
| 4356 | macro_build (&offset_expr, "bnel", "s,t,p", 0, 0); |
| 4357 | break; |
| 4358 | } |
| 4359 | if (imm_expr.X_op != O_constant) |
| 4360 | as_bad (_("Unsupported large constant")); |
| 4361 | ++imm_expr.X_add_number; |
| 4362 | /* FALLTHROUGH */ |
| 4363 | case M_BGE_I: |
| 4364 | case M_BGEL_I: |
| 4365 | if (mask == M_BGEL_I) |
| 4366 | likely = 1; |
| 4367 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 0) |
| 4368 | { |
| 4369 | macro_build (&offset_expr, likely ? "bgezl" : "bgez", "s,p", sreg); |
| 4370 | break; |
| 4371 | } |
| 4372 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 1) |
| 4373 | { |
| 4374 | macro_build (&offset_expr, likely ? "bgtzl" : "bgtz", "s,p", sreg); |
| 4375 | break; |
| 4376 | } |
| 4377 | maxnum = 0x7fffffff; |
| 4378 | if (HAVE_64BIT_GPRS && sizeof (maxnum) > 4) |
| 4379 | { |
| 4380 | maxnum <<= 16; |
| 4381 | maxnum |= 0xffff; |
| 4382 | maxnum <<= 16; |
| 4383 | maxnum |= 0xffff; |
| 4384 | } |
| 4385 | maxnum = - maxnum - 1; |
| 4386 | if (imm_expr.X_op == O_constant |
| 4387 | && imm_expr.X_add_number <= maxnum |
| 4388 | && (HAVE_32BIT_GPRS || sizeof (maxnum) > 4)) |
| 4389 | { |
| 4390 | do_true: |
| 4391 | /* result is always true */ |
| 4392 | as_warn (_("Branch %s is always true"), ip->insn_mo->name); |
| 4393 | macro_build (&offset_expr, "b", "p"); |
| 4394 | break; |
| 4395 | } |
| 4396 | used_at = 1; |
| 4397 | set_at (sreg, 0); |
| 4398 | macro_build (&offset_expr, likely ? "beql" : "beq", "s,t,p", AT, 0); |
| 4399 | break; |
| 4400 | |
| 4401 | case M_BGEUL: |
| 4402 | likely = 1; |
| 4403 | case M_BGEU: |
| 4404 | if (treg == 0) |
| 4405 | goto do_true; |
| 4406 | if (sreg == 0) |
| 4407 | { |
| 4408 | macro_build (&offset_expr, likely ? "beql" : "beq", |
| 4409 | "s,t,p", 0, treg); |
| 4410 | break; |
| 4411 | } |
| 4412 | used_at = 1; |
| 4413 | macro_build (NULL, "sltu", "d,v,t", AT, sreg, treg); |
| 4414 | macro_build (&offset_expr, likely ? "beql" : "beq", "s,t,p", AT, 0); |
| 4415 | break; |
| 4416 | |
| 4417 | case M_BGTUL_I: |
| 4418 | likely = 1; |
| 4419 | case M_BGTU_I: |
| 4420 | if (sreg == 0 |
| 4421 | || (HAVE_32BIT_GPRS |
| 4422 | && imm_expr.X_op == O_constant |
| 4423 | && imm_expr.X_add_number == (offsetT) 0xffffffff)) |
| 4424 | goto do_false; |
| 4425 | if (imm_expr.X_op != O_constant) |
| 4426 | as_bad (_("Unsupported large constant")); |
| 4427 | ++imm_expr.X_add_number; |
| 4428 | /* FALLTHROUGH */ |
| 4429 | case M_BGEU_I: |
| 4430 | case M_BGEUL_I: |
| 4431 | if (mask == M_BGEUL_I) |
| 4432 | likely = 1; |
| 4433 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 0) |
| 4434 | goto do_true; |
| 4435 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 1) |
| 4436 | { |
| 4437 | macro_build (&offset_expr, likely ? "bnel" : "bne", |
| 4438 | "s,t,p", sreg, 0); |
| 4439 | break; |
| 4440 | } |
| 4441 | used_at = 1; |
| 4442 | set_at (sreg, 1); |
| 4443 | macro_build (&offset_expr, likely ? "beql" : "beq", "s,t,p", AT, 0); |
| 4444 | break; |
| 4445 | |
| 4446 | case M_BGTL: |
| 4447 | likely = 1; |
| 4448 | case M_BGT: |
| 4449 | if (treg == 0) |
| 4450 | { |
| 4451 | macro_build (&offset_expr, likely ? "bgtzl" : "bgtz", "s,p", sreg); |
| 4452 | break; |
| 4453 | } |
| 4454 | if (sreg == 0) |
| 4455 | { |
| 4456 | macro_build (&offset_expr, likely ? "bltzl" : "bltz", "s,p", treg); |
| 4457 | break; |
| 4458 | } |
| 4459 | used_at = 1; |
| 4460 | macro_build (NULL, "slt", "d,v,t", AT, treg, sreg); |
| 4461 | macro_build (&offset_expr, likely ? "bnel" : "bne", "s,t,p", AT, 0); |
| 4462 | break; |
| 4463 | |
| 4464 | case M_BGTUL: |
| 4465 | likely = 1; |
| 4466 | case M_BGTU: |
| 4467 | if (treg == 0) |
| 4468 | { |
| 4469 | macro_build (&offset_expr, likely ? "bnel" : "bne", |
| 4470 | "s,t,p", sreg, 0); |
| 4471 | break; |
| 4472 | } |
| 4473 | if (sreg == 0) |
| 4474 | goto do_false; |
| 4475 | used_at = 1; |
| 4476 | macro_build (NULL, "sltu", "d,v,t", AT, treg, sreg); |
| 4477 | macro_build (&offset_expr, likely ? "bnel" : "bne", "s,t,p", AT, 0); |
| 4478 | break; |
| 4479 | |
| 4480 | case M_BLEL: |
| 4481 | likely = 1; |
| 4482 | case M_BLE: |
| 4483 | if (treg == 0) |
| 4484 | { |
| 4485 | macro_build (&offset_expr, likely ? "blezl" : "blez", "s,p", sreg); |
| 4486 | break; |
| 4487 | } |
| 4488 | if (sreg == 0) |
| 4489 | { |
| 4490 | macro_build (&offset_expr, likely ? "bgezl" : "bgez", "s,p", treg); |
| 4491 | break; |
| 4492 | } |
| 4493 | used_at = 1; |
| 4494 | macro_build (NULL, "slt", "d,v,t", AT, treg, sreg); |
| 4495 | macro_build (&offset_expr, likely ? "beql" : "beq", "s,t,p", AT, 0); |
| 4496 | break; |
| 4497 | |
| 4498 | case M_BLEL_I: |
| 4499 | likely = 1; |
| 4500 | case M_BLE_I: |
| 4501 | maxnum = 0x7fffffff; |
| 4502 | if (HAVE_64BIT_GPRS && sizeof (maxnum) > 4) |
| 4503 | { |
| 4504 | maxnum <<= 16; |
| 4505 | maxnum |= 0xffff; |
| 4506 | maxnum <<= 16; |
| 4507 | maxnum |= 0xffff; |
| 4508 | } |
| 4509 | if (imm_expr.X_op == O_constant |
| 4510 | && imm_expr.X_add_number >= maxnum |
| 4511 | && (HAVE_32BIT_GPRS || sizeof (maxnum) > 4)) |
| 4512 | goto do_true; |
| 4513 | if (imm_expr.X_op != O_constant) |
| 4514 | as_bad (_("Unsupported large constant")); |
| 4515 | ++imm_expr.X_add_number; |
| 4516 | /* FALLTHROUGH */ |
| 4517 | case M_BLT_I: |
| 4518 | case M_BLTL_I: |
| 4519 | if (mask == M_BLTL_I) |
| 4520 | likely = 1; |
| 4521 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 0) |
| 4522 | { |
| 4523 | macro_build (&offset_expr, likely ? "bltzl" : "bltz", "s,p", sreg); |
| 4524 | break; |
| 4525 | } |
| 4526 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 1) |
| 4527 | { |
| 4528 | macro_build (&offset_expr, likely ? "blezl" : "blez", "s,p", sreg); |
| 4529 | break; |
| 4530 | } |
| 4531 | used_at = 1; |
| 4532 | set_at (sreg, 0); |
| 4533 | macro_build (&offset_expr, likely ? "bnel" : "bne", "s,t,p", AT, 0); |
| 4534 | break; |
| 4535 | |
| 4536 | case M_BLEUL: |
| 4537 | likely = 1; |
| 4538 | case M_BLEU: |
| 4539 | if (treg == 0) |
| 4540 | { |
| 4541 | macro_build (&offset_expr, likely ? "beql" : "beq", |
| 4542 | "s,t,p", sreg, 0); |
| 4543 | break; |
| 4544 | } |
| 4545 | if (sreg == 0) |
| 4546 | goto do_true; |
| 4547 | used_at = 1; |
| 4548 | macro_build (NULL, "sltu", "d,v,t", AT, treg, sreg); |
| 4549 | macro_build (&offset_expr, likely ? "beql" : "beq", "s,t,p", AT, 0); |
| 4550 | break; |
| 4551 | |
| 4552 | case M_BLEUL_I: |
| 4553 | likely = 1; |
| 4554 | case M_BLEU_I: |
| 4555 | if (sreg == 0 |
| 4556 | || (HAVE_32BIT_GPRS |
| 4557 | && imm_expr.X_op == O_constant |
| 4558 | && imm_expr.X_add_number == (offsetT) 0xffffffff)) |
| 4559 | goto do_true; |
| 4560 | if (imm_expr.X_op != O_constant) |
| 4561 | as_bad (_("Unsupported large constant")); |
| 4562 | ++imm_expr.X_add_number; |
| 4563 | /* FALLTHROUGH */ |
| 4564 | case M_BLTU_I: |
| 4565 | case M_BLTUL_I: |
| 4566 | if (mask == M_BLTUL_I) |
| 4567 | likely = 1; |
| 4568 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 0) |
| 4569 | goto do_false; |
| 4570 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 1) |
| 4571 | { |
| 4572 | macro_build (&offset_expr, likely ? "beql" : "beq", |
| 4573 | "s,t,p", sreg, 0); |
| 4574 | break; |
| 4575 | } |
| 4576 | used_at = 1; |
| 4577 | set_at (sreg, 1); |
| 4578 | macro_build (&offset_expr, likely ? "bnel" : "bne", "s,t,p", AT, 0); |
| 4579 | break; |
| 4580 | |
| 4581 | case M_BLTL: |
| 4582 | likely = 1; |
| 4583 | case M_BLT: |
| 4584 | if (treg == 0) |
| 4585 | { |
| 4586 | macro_build (&offset_expr, likely ? "bltzl" : "bltz", "s,p", sreg); |
| 4587 | break; |
| 4588 | } |
| 4589 | if (sreg == 0) |
| 4590 | { |
| 4591 | macro_build (&offset_expr, likely ? "bgtzl" : "bgtz", "s,p", treg); |
| 4592 | break; |
| 4593 | } |
| 4594 | used_at = 1; |
| 4595 | macro_build (NULL, "slt", "d,v,t", AT, sreg, treg); |
| 4596 | macro_build (&offset_expr, likely ? "bnel" : "bne", "s,t,p", AT, 0); |
| 4597 | break; |
| 4598 | |
| 4599 | case M_BLTUL: |
| 4600 | likely = 1; |
| 4601 | case M_BLTU: |
| 4602 | if (treg == 0) |
| 4603 | goto do_false; |
| 4604 | if (sreg == 0) |
| 4605 | { |
| 4606 | macro_build (&offset_expr, likely ? "bnel" : "bne", |
| 4607 | "s,t,p", 0, treg); |
| 4608 | break; |
| 4609 | } |
| 4610 | used_at = 1; |
| 4611 | macro_build (NULL, "sltu", "d,v,t", AT, sreg, treg); |
| 4612 | macro_build (&offset_expr, likely ? "bnel" : "bne", "s,t,p", AT, 0); |
| 4613 | break; |
| 4614 | |
| 4615 | case M_DEXT: |
| 4616 | { |
| 4617 | unsigned long pos; |
| 4618 | unsigned long size; |
| 4619 | |
| 4620 | if (imm_expr.X_op != O_constant || imm2_expr.X_op != O_constant) |
| 4621 | { |
| 4622 | as_bad (_("Unsupported large constant")); |
| 4623 | pos = size = 1; |
| 4624 | } |
| 4625 | else |
| 4626 | { |
| 4627 | pos = (unsigned long) imm_expr.X_add_number; |
| 4628 | size = (unsigned long) imm2_expr.X_add_number; |
| 4629 | } |
| 4630 | |
| 4631 | if (pos > 63) |
| 4632 | { |
| 4633 | as_bad (_("Improper position (%lu)"), pos); |
| 4634 | pos = 1; |
| 4635 | } |
| 4636 | if (size == 0 || size > 64 |
| 4637 | || (pos + size - 1) > 63) |
| 4638 | { |
| 4639 | as_bad (_("Improper extract size (%lu, position %lu)"), |
| 4640 | size, pos); |
| 4641 | size = 1; |
| 4642 | } |
| 4643 | |
| 4644 | if (size <= 32 && pos < 32) |
| 4645 | { |
| 4646 | s = "dext"; |
| 4647 | fmt = "t,r,+A,+C"; |
| 4648 | } |
| 4649 | else if (size <= 32) |
| 4650 | { |
| 4651 | s = "dextu"; |
| 4652 | fmt = "t,r,+E,+H"; |
| 4653 | } |
| 4654 | else |
| 4655 | { |
| 4656 | s = "dextm"; |
| 4657 | fmt = "t,r,+A,+G"; |
| 4658 | } |
| 4659 | macro_build ((expressionS *) NULL, s, fmt, treg, sreg, pos, size - 1); |
| 4660 | } |
| 4661 | break; |
| 4662 | |
| 4663 | case M_DINS: |
| 4664 | { |
| 4665 | unsigned long pos; |
| 4666 | unsigned long size; |
| 4667 | |
| 4668 | if (imm_expr.X_op != O_constant || imm2_expr.X_op != O_constant) |
| 4669 | { |
| 4670 | as_bad (_("Unsupported large constant")); |
| 4671 | pos = size = 1; |
| 4672 | } |
| 4673 | else |
| 4674 | { |
| 4675 | pos = (unsigned long) imm_expr.X_add_number; |
| 4676 | size = (unsigned long) imm2_expr.X_add_number; |
| 4677 | } |
| 4678 | |
| 4679 | if (pos > 63) |
| 4680 | { |
| 4681 | as_bad (_("Improper position (%lu)"), pos); |
| 4682 | pos = 1; |
| 4683 | } |
| 4684 | if (size == 0 || size > 64 |
| 4685 | || (pos + size - 1) > 63) |
| 4686 | { |
| 4687 | as_bad (_("Improper insert size (%lu, position %lu)"), |
| 4688 | size, pos); |
| 4689 | size = 1; |
| 4690 | } |
| 4691 | |
| 4692 | if (pos < 32 && (pos + size - 1) < 32) |
| 4693 | { |
| 4694 | s = "dins"; |
| 4695 | fmt = "t,r,+A,+B"; |
| 4696 | } |
| 4697 | else if (pos >= 32) |
| 4698 | { |
| 4699 | s = "dinsu"; |
| 4700 | fmt = "t,r,+E,+F"; |
| 4701 | } |
| 4702 | else |
| 4703 | { |
| 4704 | s = "dinsm"; |
| 4705 | fmt = "t,r,+A,+F"; |
| 4706 | } |
| 4707 | macro_build ((expressionS *) NULL, s, fmt, treg, sreg, pos, |
| 4708 | pos + size - 1); |
| 4709 | } |
| 4710 | break; |
| 4711 | |
| 4712 | case M_DDIV_3: |
| 4713 | dbl = 1; |
| 4714 | case M_DIV_3: |
| 4715 | s = "mflo"; |
| 4716 | goto do_div3; |
| 4717 | case M_DREM_3: |
| 4718 | dbl = 1; |
| 4719 | case M_REM_3: |
| 4720 | s = "mfhi"; |
| 4721 | do_div3: |
| 4722 | if (treg == 0) |
| 4723 | { |
| 4724 | as_warn (_("Divide by zero.")); |
| 4725 | if (mips_trap) |
| 4726 | macro_build (NULL, "teq", "s,t,q", 0, 0, 7); |
| 4727 | else |
| 4728 | macro_build (NULL, "break", "c", 7); |
| 4729 | break; |
| 4730 | } |
| 4731 | |
| 4732 | start_noreorder (); |
| 4733 | if (mips_trap) |
| 4734 | { |
| 4735 | macro_build (NULL, "teq", "s,t,q", treg, 0, 7); |
| 4736 | macro_build (NULL, dbl ? "ddiv" : "div", "z,s,t", sreg, treg); |
| 4737 | } |
| 4738 | else |
| 4739 | { |
| 4740 | expr1.X_add_number = 8; |
| 4741 | macro_build (&expr1, "bne", "s,t,p", treg, 0); |
| 4742 | macro_build (NULL, dbl ? "ddiv" : "div", "z,s,t", sreg, treg); |
| 4743 | macro_build (NULL, "break", "c", 7); |
| 4744 | } |
| 4745 | expr1.X_add_number = -1; |
| 4746 | used_at = 1; |
| 4747 | load_register (AT, &expr1, dbl); |
| 4748 | expr1.X_add_number = mips_trap ? (dbl ? 12 : 8) : (dbl ? 20 : 16); |
| 4749 | macro_build (&expr1, "bne", "s,t,p", treg, AT); |
| 4750 | if (dbl) |
| 4751 | { |
| 4752 | expr1.X_add_number = 1; |
| 4753 | load_register (AT, &expr1, dbl); |
| 4754 | macro_build (NULL, "dsll32", "d,w,<", AT, AT, 31); |
| 4755 | } |
| 4756 | else |
| 4757 | { |
| 4758 | expr1.X_add_number = 0x80000000; |
| 4759 | macro_build (&expr1, "lui", "t,u", AT, BFD_RELOC_HI16); |
| 4760 | } |
| 4761 | if (mips_trap) |
| 4762 | { |
| 4763 | macro_build (NULL, "teq", "s,t,q", sreg, AT, 6); |
| 4764 | /* We want to close the noreorder block as soon as possible, so |
| 4765 | that later insns are available for delay slot filling. */ |
| 4766 | end_noreorder (); |
| 4767 | } |
| 4768 | else |
| 4769 | { |
| 4770 | expr1.X_add_number = 8; |
| 4771 | macro_build (&expr1, "bne", "s,t,p", sreg, AT); |
| 4772 | macro_build (NULL, "nop", "", 0); |
| 4773 | |
| 4774 | /* We want to close the noreorder block as soon as possible, so |
| 4775 | that later insns are available for delay slot filling. */ |
| 4776 | end_noreorder (); |
| 4777 | |
| 4778 | macro_build (NULL, "break", "c", 6); |
| 4779 | } |
| 4780 | macro_build (NULL, s, "d", dreg); |
| 4781 | break; |
| 4782 | |
| 4783 | case M_DIV_3I: |
| 4784 | s = "div"; |
| 4785 | s2 = "mflo"; |
| 4786 | goto do_divi; |
| 4787 | case M_DIVU_3I: |
| 4788 | s = "divu"; |
| 4789 | s2 = "mflo"; |
| 4790 | goto do_divi; |
| 4791 | case M_REM_3I: |
| 4792 | s = "div"; |
| 4793 | s2 = "mfhi"; |
| 4794 | goto do_divi; |
| 4795 | case M_REMU_3I: |
| 4796 | s = "divu"; |
| 4797 | s2 = "mfhi"; |
| 4798 | goto do_divi; |
| 4799 | case M_DDIV_3I: |
| 4800 | dbl = 1; |
| 4801 | s = "ddiv"; |
| 4802 | s2 = "mflo"; |
| 4803 | goto do_divi; |
| 4804 | case M_DDIVU_3I: |
| 4805 | dbl = 1; |
| 4806 | s = "ddivu"; |
| 4807 | s2 = "mflo"; |
| 4808 | goto do_divi; |
| 4809 | case M_DREM_3I: |
| 4810 | dbl = 1; |
| 4811 | s = "ddiv"; |
| 4812 | s2 = "mfhi"; |
| 4813 | goto do_divi; |
| 4814 | case M_DREMU_3I: |
| 4815 | dbl = 1; |
| 4816 | s = "ddivu"; |
| 4817 | s2 = "mfhi"; |
| 4818 | do_divi: |
| 4819 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 0) |
| 4820 | { |
| 4821 | as_warn (_("Divide by zero.")); |
| 4822 | if (mips_trap) |
| 4823 | macro_build (NULL, "teq", "s,t,q", 0, 0, 7); |
| 4824 | else |
| 4825 | macro_build (NULL, "break", "c", 7); |
| 4826 | break; |
| 4827 | } |
| 4828 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 1) |
| 4829 | { |
| 4830 | if (strcmp (s2, "mflo") == 0) |
| 4831 | move_register (dreg, sreg); |
| 4832 | else |
| 4833 | move_register (dreg, 0); |
| 4834 | break; |
| 4835 | } |
| 4836 | if (imm_expr.X_op == O_constant |
| 4837 | && imm_expr.X_add_number == -1 |
| 4838 | && s[strlen (s) - 1] != 'u') |
| 4839 | { |
| 4840 | if (strcmp (s2, "mflo") == 0) |
| 4841 | { |
| 4842 | macro_build (NULL, dbl ? "dneg" : "neg", "d,w", dreg, sreg); |
| 4843 | } |
| 4844 | else |
| 4845 | move_register (dreg, 0); |
| 4846 | break; |
| 4847 | } |
| 4848 | |
| 4849 | used_at = 1; |
| 4850 | load_register (AT, &imm_expr, dbl); |
| 4851 | macro_build (NULL, s, "z,s,t", sreg, AT); |
| 4852 | macro_build (NULL, s2, "d", dreg); |
| 4853 | break; |
| 4854 | |
| 4855 | case M_DIVU_3: |
| 4856 | s = "divu"; |
| 4857 | s2 = "mflo"; |
| 4858 | goto do_divu3; |
| 4859 | case M_REMU_3: |
| 4860 | s = "divu"; |
| 4861 | s2 = "mfhi"; |
| 4862 | goto do_divu3; |
| 4863 | case M_DDIVU_3: |
| 4864 | s = "ddivu"; |
| 4865 | s2 = "mflo"; |
| 4866 | goto do_divu3; |
| 4867 | case M_DREMU_3: |
| 4868 | s = "ddivu"; |
| 4869 | s2 = "mfhi"; |
| 4870 | do_divu3: |
| 4871 | start_noreorder (); |
| 4872 | if (mips_trap) |
| 4873 | { |
| 4874 | macro_build (NULL, "teq", "s,t,q", treg, 0, 7); |
| 4875 | macro_build (NULL, s, "z,s,t", sreg, treg); |
| 4876 | /* We want to close the noreorder block as soon as possible, so |
| 4877 | that later insns are available for delay slot filling. */ |
| 4878 | end_noreorder (); |
| 4879 | } |
| 4880 | else |
| 4881 | { |
| 4882 | expr1.X_add_number = 8; |
| 4883 | macro_build (&expr1, "bne", "s,t,p", treg, 0); |
| 4884 | macro_build (NULL, s, "z,s,t", sreg, treg); |
| 4885 | |
| 4886 | /* We want to close the noreorder block as soon as possible, so |
| 4887 | that later insns are available for delay slot filling. */ |
| 4888 | end_noreorder (); |
| 4889 | macro_build (NULL, "break", "c", 7); |
| 4890 | } |
| 4891 | macro_build (NULL, s2, "d", dreg); |
| 4892 | break; |
| 4893 | |
| 4894 | case M_DLCA_AB: |
| 4895 | dbl = 1; |
| 4896 | case M_LCA_AB: |
| 4897 | call = 1; |
| 4898 | goto do_la; |
| 4899 | case M_DLA_AB: |
| 4900 | dbl = 1; |
| 4901 | case M_LA_AB: |
| 4902 | do_la: |
| 4903 | /* Load the address of a symbol into a register. If breg is not |
| 4904 | zero, we then add a base register to it. */ |
| 4905 | |
| 4906 | if (dbl && HAVE_32BIT_GPRS) |
| 4907 | as_warn (_("dla used to load 32-bit register")); |
| 4908 | |
| 4909 | if (! dbl && HAVE_64BIT_OBJECTS) |
| 4910 | as_warn (_("la used to load 64-bit address")); |
| 4911 | |
| 4912 | if (offset_expr.X_op == O_constant |
| 4913 | && offset_expr.X_add_number >= -0x8000 |
| 4914 | && offset_expr.X_add_number < 0x8000) |
| 4915 | { |
| 4916 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, |
| 4917 | "t,r,j", treg, sreg, BFD_RELOC_LO16); |
| 4918 | break; |
| 4919 | } |
| 4920 | |
| 4921 | if (!mips_opts.noat && (treg == breg)) |
| 4922 | { |
| 4923 | tempreg = AT; |
| 4924 | used_at = 1; |
| 4925 | } |
| 4926 | else |
| 4927 | { |
| 4928 | tempreg = treg; |
| 4929 | } |
| 4930 | |
| 4931 | if (offset_expr.X_op != O_symbol |
| 4932 | && offset_expr.X_op != O_constant) |
| 4933 | { |
| 4934 | as_bad (_("expression too complex")); |
| 4935 | offset_expr.X_op = O_constant; |
| 4936 | } |
| 4937 | |
| 4938 | if (offset_expr.X_op == O_constant) |
| 4939 | load_register (tempreg, &offset_expr, HAVE_64BIT_ADDRESSES); |
| 4940 | else if (mips_pic == NO_PIC) |
| 4941 | { |
| 4942 | /* If this is a reference to a GP relative symbol, we want |
| 4943 | addiu $tempreg,$gp,<sym> (BFD_RELOC_GPREL16) |
| 4944 | Otherwise we want |
| 4945 | lui $tempreg,<sym> (BFD_RELOC_HI16_S) |
| 4946 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) |
| 4947 | If we have a constant, we need two instructions anyhow, |
| 4948 | so we may as well always use the latter form. |
| 4949 | |
| 4950 | With 64bit address space and a usable $at we want |
| 4951 | lui $tempreg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 4952 | lui $at,<sym> (BFD_RELOC_HI16_S) |
| 4953 | daddiu $tempreg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 4954 | daddiu $at,<sym> (BFD_RELOC_LO16) |
| 4955 | dsll32 $tempreg,0 |
| 4956 | daddu $tempreg,$tempreg,$at |
| 4957 | |
| 4958 | If $at is already in use, we use a path which is suboptimal |
| 4959 | on superscalar processors. |
| 4960 | lui $tempreg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 4961 | daddiu $tempreg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 4962 | dsll $tempreg,16 |
| 4963 | daddiu $tempreg,<sym> (BFD_RELOC_HI16_S) |
| 4964 | dsll $tempreg,16 |
| 4965 | daddiu $tempreg,<sym> (BFD_RELOC_LO16) |
| 4966 | |
| 4967 | For GP relative symbols in 64bit address space we can use |
| 4968 | the same sequence as in 32bit address space. */ |
| 4969 | if (HAVE_64BIT_SYMBOLS) |
| 4970 | { |
| 4971 | if ((valueT) offset_expr.X_add_number <= MAX_GPREL_OFFSET |
| 4972 | && !nopic_need_relax (offset_expr.X_add_symbol, 1)) |
| 4973 | { |
| 4974 | relax_start (offset_expr.X_add_symbol); |
| 4975 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 4976 | tempreg, mips_gp_register, BFD_RELOC_GPREL16); |
| 4977 | relax_switch (); |
| 4978 | } |
| 4979 | |
| 4980 | if (used_at == 0 && !mips_opts.noat) |
| 4981 | { |
| 4982 | macro_build (&offset_expr, "lui", "t,u", |
| 4983 | tempreg, BFD_RELOC_MIPS_HIGHEST); |
| 4984 | macro_build (&offset_expr, "lui", "t,u", |
| 4985 | AT, BFD_RELOC_HI16_S); |
| 4986 | macro_build (&offset_expr, "daddiu", "t,r,j", |
| 4987 | tempreg, tempreg, BFD_RELOC_MIPS_HIGHER); |
| 4988 | macro_build (&offset_expr, "daddiu", "t,r,j", |
| 4989 | AT, AT, BFD_RELOC_LO16); |
| 4990 | macro_build (NULL, "dsll32", "d,w,<", tempreg, tempreg, 0); |
| 4991 | macro_build (NULL, "daddu", "d,v,t", tempreg, tempreg, AT); |
| 4992 | used_at = 1; |
| 4993 | } |
| 4994 | else |
| 4995 | { |
| 4996 | macro_build (&offset_expr, "lui", "t,u", |
| 4997 | tempreg, BFD_RELOC_MIPS_HIGHEST); |
| 4998 | macro_build (&offset_expr, "daddiu", "t,r,j", |
| 4999 | tempreg, tempreg, BFD_RELOC_MIPS_HIGHER); |
| 5000 | macro_build (NULL, "dsll", "d,w,<", tempreg, tempreg, 16); |
| 5001 | macro_build (&offset_expr, "daddiu", "t,r,j", |
| 5002 | tempreg, tempreg, BFD_RELOC_HI16_S); |
| 5003 | macro_build (NULL, "dsll", "d,w,<", tempreg, tempreg, 16); |
| 5004 | macro_build (&offset_expr, "daddiu", "t,r,j", |
| 5005 | tempreg, tempreg, BFD_RELOC_LO16); |
| 5006 | } |
| 5007 | |
| 5008 | if (mips_relax.sequence) |
| 5009 | relax_end (); |
| 5010 | } |
| 5011 | else |
| 5012 | { |
| 5013 | if ((valueT) offset_expr.X_add_number <= MAX_GPREL_OFFSET |
| 5014 | && !nopic_need_relax (offset_expr.X_add_symbol, 1)) |
| 5015 | { |
| 5016 | relax_start (offset_expr.X_add_symbol); |
| 5017 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 5018 | tempreg, mips_gp_register, BFD_RELOC_GPREL16); |
| 5019 | relax_switch (); |
| 5020 | } |
| 5021 | if (!IS_SEXT_32BIT_NUM (offset_expr.X_add_number)) |
| 5022 | as_bad (_("offset too large")); |
| 5023 | macro_build_lui (&offset_expr, tempreg); |
| 5024 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 5025 | tempreg, tempreg, BFD_RELOC_LO16); |
| 5026 | if (mips_relax.sequence) |
| 5027 | relax_end (); |
| 5028 | } |
| 5029 | } |
| 5030 | else if (!mips_big_got && !HAVE_NEWABI) |
| 5031 | { |
| 5032 | int lw_reloc_type = (int) BFD_RELOC_MIPS_GOT16; |
| 5033 | |
| 5034 | /* If this is a reference to an external symbol, and there |
| 5035 | is no constant, we want |
| 5036 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 5037 | or for lca or if tempreg is PIC_CALL_REG |
| 5038 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_CALL16) |
| 5039 | For a local symbol, we want |
| 5040 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 5041 | nop |
| 5042 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) |
| 5043 | |
| 5044 | If we have a small constant, and this is a reference to |
| 5045 | an external symbol, we want |
| 5046 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 5047 | nop |
| 5048 | addiu $tempreg,$tempreg,<constant> |
| 5049 | For a local symbol, we want the same instruction |
| 5050 | sequence, but we output a BFD_RELOC_LO16 reloc on the |
| 5051 | addiu instruction. |
| 5052 | |
| 5053 | If we have a large constant, and this is a reference to |
| 5054 | an external symbol, we want |
| 5055 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 5056 | lui $at,<hiconstant> |
| 5057 | addiu $at,$at,<loconstant> |
| 5058 | addu $tempreg,$tempreg,$at |
| 5059 | For a local symbol, we want the same instruction |
| 5060 | sequence, but we output a BFD_RELOC_LO16 reloc on the |
| 5061 | addiu instruction. |
| 5062 | */ |
| 5063 | |
| 5064 | if (offset_expr.X_add_number == 0) |
| 5065 | { |
| 5066 | if (mips_pic == SVR4_PIC |
| 5067 | && breg == 0 |
| 5068 | && (call || tempreg == PIC_CALL_REG)) |
| 5069 | lw_reloc_type = (int) BFD_RELOC_MIPS_CALL16; |
| 5070 | |
| 5071 | relax_start (offset_expr.X_add_symbol); |
| 5072 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 5073 | lw_reloc_type, mips_gp_register); |
| 5074 | if (breg != 0) |
| 5075 | { |
| 5076 | /* We're going to put in an addu instruction using |
| 5077 | tempreg, so we may as well insert the nop right |
| 5078 | now. */ |
| 5079 | load_delay_nop (); |
| 5080 | } |
| 5081 | relax_switch (); |
| 5082 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 5083 | tempreg, BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 5084 | load_delay_nop (); |
| 5085 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 5086 | tempreg, tempreg, BFD_RELOC_LO16); |
| 5087 | relax_end (); |
| 5088 | /* FIXME: If breg == 0, and the next instruction uses |
| 5089 | $tempreg, then if this variant case is used an extra |
| 5090 | nop will be generated. */ |
| 5091 | } |
| 5092 | else if (offset_expr.X_add_number >= -0x8000 |
| 5093 | && offset_expr.X_add_number < 0x8000) |
| 5094 | { |
| 5095 | load_got_offset (tempreg, &offset_expr); |
| 5096 | load_delay_nop (); |
| 5097 | add_got_offset (tempreg, &offset_expr); |
| 5098 | } |
| 5099 | else |
| 5100 | { |
| 5101 | expr1.X_add_number = offset_expr.X_add_number; |
| 5102 | offset_expr.X_add_number = |
| 5103 | ((offset_expr.X_add_number + 0x8000) & 0xffff) - 0x8000; |
| 5104 | load_got_offset (tempreg, &offset_expr); |
| 5105 | offset_expr.X_add_number = expr1.X_add_number; |
| 5106 | /* If we are going to add in a base register, and the |
| 5107 | target register and the base register are the same, |
| 5108 | then we are using AT as a temporary register. Since |
| 5109 | we want to load the constant into AT, we add our |
| 5110 | current AT (from the global offset table) and the |
| 5111 | register into the register now, and pretend we were |
| 5112 | not using a base register. */ |
| 5113 | if (breg == treg) |
| 5114 | { |
| 5115 | load_delay_nop (); |
| 5116 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5117 | treg, AT, breg); |
| 5118 | breg = 0; |
| 5119 | tempreg = treg; |
| 5120 | } |
| 5121 | add_got_offset_hilo (tempreg, &offset_expr, AT); |
| 5122 | used_at = 1; |
| 5123 | } |
| 5124 | } |
| 5125 | else if (!mips_big_got && HAVE_NEWABI) |
| 5126 | { |
| 5127 | int add_breg_early = 0; |
| 5128 | |
| 5129 | /* If this is a reference to an external, and there is no |
| 5130 | constant, or local symbol (*), with or without a |
| 5131 | constant, we want |
| 5132 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT_DISP) |
| 5133 | or for lca or if tempreg is PIC_CALL_REG |
| 5134 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_CALL16) |
| 5135 | |
| 5136 | If we have a small constant, and this is a reference to |
| 5137 | an external symbol, we want |
| 5138 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT_DISP) |
| 5139 | addiu $tempreg,$tempreg,<constant> |
| 5140 | |
| 5141 | If we have a large constant, and this is a reference to |
| 5142 | an external symbol, we want |
| 5143 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT_DISP) |
| 5144 | lui $at,<hiconstant> |
| 5145 | addiu $at,$at,<loconstant> |
| 5146 | addu $tempreg,$tempreg,$at |
| 5147 | |
| 5148 | (*) Other assemblers seem to prefer GOT_PAGE/GOT_OFST for |
| 5149 | local symbols, even though it introduces an additional |
| 5150 | instruction. */ |
| 5151 | |
| 5152 | if (offset_expr.X_add_number) |
| 5153 | { |
| 5154 | expr1.X_add_number = offset_expr.X_add_number; |
| 5155 | offset_expr.X_add_number = 0; |
| 5156 | |
| 5157 | relax_start (offset_expr.X_add_symbol); |
| 5158 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 5159 | BFD_RELOC_MIPS_GOT_DISP, mips_gp_register); |
| 5160 | |
| 5161 | if (expr1.X_add_number >= -0x8000 |
| 5162 | && expr1.X_add_number < 0x8000) |
| 5163 | { |
| 5164 | macro_build (&expr1, ADDRESS_ADDI_INSN, "t,r,j", |
| 5165 | tempreg, tempreg, BFD_RELOC_LO16); |
| 5166 | } |
| 5167 | else if (IS_SEXT_32BIT_NUM (expr1.X_add_number + 0x8000)) |
| 5168 | { |
| 5169 | int dreg; |
| 5170 | |
| 5171 | /* If we are going to add in a base register, and the |
| 5172 | target register and the base register are the same, |
| 5173 | then we are using AT as a temporary register. Since |
| 5174 | we want to load the constant into AT, we add our |
| 5175 | current AT (from the global offset table) and the |
| 5176 | register into the register now, and pretend we were |
| 5177 | not using a base register. */ |
| 5178 | if (breg != treg) |
| 5179 | dreg = tempreg; |
| 5180 | else |
| 5181 | { |
| 5182 | assert (tempreg == AT); |
| 5183 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5184 | treg, AT, breg); |
| 5185 | dreg = treg; |
| 5186 | add_breg_early = 1; |
| 5187 | } |
| 5188 | |
| 5189 | load_register (AT, &expr1, HAVE_64BIT_ADDRESSES); |
| 5190 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5191 | dreg, dreg, AT); |
| 5192 | |
| 5193 | used_at = 1; |
| 5194 | } |
| 5195 | else |
| 5196 | as_bad (_("PIC code offset overflow (max 32 signed bits)")); |
| 5197 | |
| 5198 | relax_switch (); |
| 5199 | offset_expr.X_add_number = expr1.X_add_number; |
| 5200 | |
| 5201 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 5202 | BFD_RELOC_MIPS_GOT_DISP, mips_gp_register); |
| 5203 | if (add_breg_early) |
| 5204 | { |
| 5205 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5206 | treg, tempreg, breg); |
| 5207 | breg = 0; |
| 5208 | tempreg = treg; |
| 5209 | } |
| 5210 | relax_end (); |
| 5211 | } |
| 5212 | else if (breg == 0 && (call || tempreg == PIC_CALL_REG)) |
| 5213 | { |
| 5214 | relax_start (offset_expr.X_add_symbol); |
| 5215 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 5216 | BFD_RELOC_MIPS_CALL16, mips_gp_register); |
| 5217 | relax_switch (); |
| 5218 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 5219 | BFD_RELOC_MIPS_GOT_DISP, mips_gp_register); |
| 5220 | relax_end (); |
| 5221 | } |
| 5222 | else |
| 5223 | { |
| 5224 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 5225 | BFD_RELOC_MIPS_GOT_DISP, mips_gp_register); |
| 5226 | } |
| 5227 | } |
| 5228 | else if (mips_big_got && !HAVE_NEWABI) |
| 5229 | { |
| 5230 | int gpdelay; |
| 5231 | int lui_reloc_type = (int) BFD_RELOC_MIPS_GOT_HI16; |
| 5232 | int lw_reloc_type = (int) BFD_RELOC_MIPS_GOT_LO16; |
| 5233 | int local_reloc_type = (int) BFD_RELOC_MIPS_GOT16; |
| 5234 | |
| 5235 | /* This is the large GOT case. If this is a reference to an |
| 5236 | external symbol, and there is no constant, we want |
| 5237 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 5238 | addu $tempreg,$tempreg,$gp |
| 5239 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 5240 | or for lca or if tempreg is PIC_CALL_REG |
| 5241 | lui $tempreg,<sym> (BFD_RELOC_MIPS_CALL_HI16) |
| 5242 | addu $tempreg,$tempreg,$gp |
| 5243 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_CALL_LO16) |
| 5244 | For a local symbol, we want |
| 5245 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 5246 | nop |
| 5247 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) |
| 5248 | |
| 5249 | If we have a small constant, and this is a reference to |
| 5250 | an external symbol, we want |
| 5251 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 5252 | addu $tempreg,$tempreg,$gp |
| 5253 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 5254 | nop |
| 5255 | addiu $tempreg,$tempreg,<constant> |
| 5256 | For a local symbol, we want |
| 5257 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 5258 | nop |
| 5259 | addiu $tempreg,$tempreg,<constant> (BFD_RELOC_LO16) |
| 5260 | |
| 5261 | If we have a large constant, and this is a reference to |
| 5262 | an external symbol, we want |
| 5263 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 5264 | addu $tempreg,$tempreg,$gp |
| 5265 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 5266 | lui $at,<hiconstant> |
| 5267 | addiu $at,$at,<loconstant> |
| 5268 | addu $tempreg,$tempreg,$at |
| 5269 | For a local symbol, we want |
| 5270 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 5271 | lui $at,<hiconstant> |
| 5272 | addiu $at,$at,<loconstant> (BFD_RELOC_LO16) |
| 5273 | addu $tempreg,$tempreg,$at |
| 5274 | */ |
| 5275 | |
| 5276 | expr1.X_add_number = offset_expr.X_add_number; |
| 5277 | offset_expr.X_add_number = 0; |
| 5278 | relax_start (offset_expr.X_add_symbol); |
| 5279 | gpdelay = reg_needs_delay (mips_gp_register); |
| 5280 | if (expr1.X_add_number == 0 && breg == 0 |
| 5281 | && (call || tempreg == PIC_CALL_REG)) |
| 5282 | { |
| 5283 | lui_reloc_type = (int) BFD_RELOC_MIPS_CALL_HI16; |
| 5284 | lw_reloc_type = (int) BFD_RELOC_MIPS_CALL_LO16; |
| 5285 | } |
| 5286 | macro_build (&offset_expr, "lui", "t,u", tempreg, lui_reloc_type); |
| 5287 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5288 | tempreg, tempreg, mips_gp_register); |
| 5289 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 5290 | tempreg, lw_reloc_type, tempreg); |
| 5291 | if (expr1.X_add_number == 0) |
| 5292 | { |
| 5293 | if (breg != 0) |
| 5294 | { |
| 5295 | /* We're going to put in an addu instruction using |
| 5296 | tempreg, so we may as well insert the nop right |
| 5297 | now. */ |
| 5298 | load_delay_nop (); |
| 5299 | } |
| 5300 | } |
| 5301 | else if (expr1.X_add_number >= -0x8000 |
| 5302 | && expr1.X_add_number < 0x8000) |
| 5303 | { |
| 5304 | load_delay_nop (); |
| 5305 | macro_build (&expr1, ADDRESS_ADDI_INSN, "t,r,j", |
| 5306 | tempreg, tempreg, BFD_RELOC_LO16); |
| 5307 | } |
| 5308 | else |
| 5309 | { |
| 5310 | int dreg; |
| 5311 | |
| 5312 | /* If we are going to add in a base register, and the |
| 5313 | target register and the base register are the same, |
| 5314 | then we are using AT as a temporary register. Since |
| 5315 | we want to load the constant into AT, we add our |
| 5316 | current AT (from the global offset table) and the |
| 5317 | register into the register now, and pretend we were |
| 5318 | not using a base register. */ |
| 5319 | if (breg != treg) |
| 5320 | dreg = tempreg; |
| 5321 | else |
| 5322 | { |
| 5323 | assert (tempreg == AT); |
| 5324 | load_delay_nop (); |
| 5325 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5326 | treg, AT, breg); |
| 5327 | dreg = treg; |
| 5328 | } |
| 5329 | |
| 5330 | load_register (AT, &expr1, HAVE_64BIT_ADDRESSES); |
| 5331 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", dreg, dreg, AT); |
| 5332 | |
| 5333 | used_at = 1; |
| 5334 | } |
| 5335 | offset_expr.X_add_number = |
| 5336 | ((expr1.X_add_number + 0x8000) & 0xffff) - 0x8000; |
| 5337 | relax_switch (); |
| 5338 | |
| 5339 | if (gpdelay) |
| 5340 | { |
| 5341 | /* This is needed because this instruction uses $gp, but |
| 5342 | the first instruction on the main stream does not. */ |
| 5343 | macro_build (NULL, "nop", ""); |
| 5344 | } |
| 5345 | |
| 5346 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 5347 | local_reloc_type, mips_gp_register); |
| 5348 | if (expr1.X_add_number >= -0x8000 |
| 5349 | && expr1.X_add_number < 0x8000) |
| 5350 | { |
| 5351 | load_delay_nop (); |
| 5352 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 5353 | tempreg, tempreg, BFD_RELOC_LO16); |
| 5354 | /* FIXME: If add_number is 0, and there was no base |
| 5355 | register, the external symbol case ended with a load, |
| 5356 | so if the symbol turns out to not be external, and |
| 5357 | the next instruction uses tempreg, an unnecessary nop |
| 5358 | will be inserted. */ |
| 5359 | } |
| 5360 | else |
| 5361 | { |
| 5362 | if (breg == treg) |
| 5363 | { |
| 5364 | /* We must add in the base register now, as in the |
| 5365 | external symbol case. */ |
| 5366 | assert (tempreg == AT); |
| 5367 | load_delay_nop (); |
| 5368 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5369 | treg, AT, breg); |
| 5370 | tempreg = treg; |
| 5371 | /* We set breg to 0 because we have arranged to add |
| 5372 | it in in both cases. */ |
| 5373 | breg = 0; |
| 5374 | } |
| 5375 | |
| 5376 | macro_build_lui (&expr1, AT); |
| 5377 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 5378 | AT, AT, BFD_RELOC_LO16); |
| 5379 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5380 | tempreg, tempreg, AT); |
| 5381 | used_at = 1; |
| 5382 | } |
| 5383 | relax_end (); |
| 5384 | } |
| 5385 | else if (mips_big_got && HAVE_NEWABI) |
| 5386 | { |
| 5387 | int lui_reloc_type = (int) BFD_RELOC_MIPS_GOT_HI16; |
| 5388 | int lw_reloc_type = (int) BFD_RELOC_MIPS_GOT_LO16; |
| 5389 | int add_breg_early = 0; |
| 5390 | |
| 5391 | /* This is the large GOT case. If this is a reference to an |
| 5392 | external symbol, and there is no constant, we want |
| 5393 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 5394 | add $tempreg,$tempreg,$gp |
| 5395 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 5396 | or for lca or if tempreg is PIC_CALL_REG |
| 5397 | lui $tempreg,<sym> (BFD_RELOC_MIPS_CALL_HI16) |
| 5398 | add $tempreg,$tempreg,$gp |
| 5399 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_CALL_LO16) |
| 5400 | |
| 5401 | If we have a small constant, and this is a reference to |
| 5402 | an external symbol, we want |
| 5403 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 5404 | add $tempreg,$tempreg,$gp |
| 5405 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 5406 | addi $tempreg,$tempreg,<constant> |
| 5407 | |
| 5408 | If we have a large constant, and this is a reference to |
| 5409 | an external symbol, we want |
| 5410 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 5411 | addu $tempreg,$tempreg,$gp |
| 5412 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 5413 | lui $at,<hiconstant> |
| 5414 | addi $at,$at,<loconstant> |
| 5415 | add $tempreg,$tempreg,$at |
| 5416 | |
| 5417 | If we have NewABI, and we know it's a local symbol, we want |
| 5418 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT_PAGE) |
| 5419 | addiu $reg,$reg,<sym> (BFD_RELOC_MIPS_GOT_OFST) |
| 5420 | otherwise we have to resort to GOT_HI16/GOT_LO16. */ |
| 5421 | |
| 5422 | relax_start (offset_expr.X_add_symbol); |
| 5423 | |
| 5424 | expr1.X_add_number = offset_expr.X_add_number; |
| 5425 | offset_expr.X_add_number = 0; |
| 5426 | |
| 5427 | if (expr1.X_add_number == 0 && breg == 0 |
| 5428 | && (call || tempreg == PIC_CALL_REG)) |
| 5429 | { |
| 5430 | lui_reloc_type = (int) BFD_RELOC_MIPS_CALL_HI16; |
| 5431 | lw_reloc_type = (int) BFD_RELOC_MIPS_CALL_LO16; |
| 5432 | } |
| 5433 | macro_build (&offset_expr, "lui", "t,u", tempreg, lui_reloc_type); |
| 5434 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5435 | tempreg, tempreg, mips_gp_register); |
| 5436 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 5437 | tempreg, lw_reloc_type, tempreg); |
| 5438 | |
| 5439 | if (expr1.X_add_number == 0) |
| 5440 | ; |
| 5441 | else if (expr1.X_add_number >= -0x8000 |
| 5442 | && expr1.X_add_number < 0x8000) |
| 5443 | { |
| 5444 | macro_build (&expr1, ADDRESS_ADDI_INSN, "t,r,j", |
| 5445 | tempreg, tempreg, BFD_RELOC_LO16); |
| 5446 | } |
| 5447 | else if (IS_SEXT_32BIT_NUM (expr1.X_add_number + 0x8000)) |
| 5448 | { |
| 5449 | int dreg; |
| 5450 | |
| 5451 | /* If we are going to add in a base register, and the |
| 5452 | target register and the base register are the same, |
| 5453 | then we are using AT as a temporary register. Since |
| 5454 | we want to load the constant into AT, we add our |
| 5455 | current AT (from the global offset table) and the |
| 5456 | register into the register now, and pretend we were |
| 5457 | not using a base register. */ |
| 5458 | if (breg != treg) |
| 5459 | dreg = tempreg; |
| 5460 | else |
| 5461 | { |
| 5462 | assert (tempreg == AT); |
| 5463 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5464 | treg, AT, breg); |
| 5465 | dreg = treg; |
| 5466 | add_breg_early = 1; |
| 5467 | } |
| 5468 | |
| 5469 | load_register (AT, &expr1, HAVE_64BIT_ADDRESSES); |
| 5470 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", dreg, dreg, AT); |
| 5471 | |
| 5472 | used_at = 1; |
| 5473 | } |
| 5474 | else |
| 5475 | as_bad (_("PIC code offset overflow (max 32 signed bits)")); |
| 5476 | |
| 5477 | relax_switch (); |
| 5478 | offset_expr.X_add_number = expr1.X_add_number; |
| 5479 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 5480 | BFD_RELOC_MIPS_GOT_PAGE, mips_gp_register); |
| 5481 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", tempreg, |
| 5482 | tempreg, BFD_RELOC_MIPS_GOT_OFST); |
| 5483 | if (add_breg_early) |
| 5484 | { |
| 5485 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5486 | treg, tempreg, breg); |
| 5487 | breg = 0; |
| 5488 | tempreg = treg; |
| 5489 | } |
| 5490 | relax_end (); |
| 5491 | } |
| 5492 | else |
| 5493 | abort (); |
| 5494 | |
| 5495 | if (breg != 0) |
| 5496 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", treg, tempreg, breg); |
| 5497 | break; |
| 5498 | |
| 5499 | case M_J_A: |
| 5500 | /* The j instruction may not be used in PIC code, since it |
| 5501 | requires an absolute address. We convert it to a b |
| 5502 | instruction. */ |
| 5503 | if (mips_pic == NO_PIC) |
| 5504 | macro_build (&offset_expr, "j", "a"); |
| 5505 | else |
| 5506 | macro_build (&offset_expr, "b", "p"); |
| 5507 | break; |
| 5508 | |
| 5509 | /* The jal instructions must be handled as macros because when |
| 5510 | generating PIC code they expand to multi-instruction |
| 5511 | sequences. Normally they are simple instructions. */ |
| 5512 | case M_JAL_1: |
| 5513 | dreg = RA; |
| 5514 | /* Fall through. */ |
| 5515 | case M_JAL_2: |
| 5516 | if (mips_pic == NO_PIC) |
| 5517 | macro_build (NULL, "jalr", "d,s", dreg, sreg); |
| 5518 | else |
| 5519 | { |
| 5520 | if (sreg != PIC_CALL_REG) |
| 5521 | as_warn (_("MIPS PIC call to register other than $25")); |
| 5522 | |
| 5523 | macro_build (NULL, "jalr", "d,s", dreg, sreg); |
| 5524 | if (mips_pic == SVR4_PIC && !HAVE_NEWABI) |
| 5525 | { |
| 5526 | if (mips_cprestore_offset < 0) |
| 5527 | as_warn (_("No .cprestore pseudo-op used in PIC code")); |
| 5528 | else |
| 5529 | { |
| 5530 | if (! mips_frame_reg_valid) |
| 5531 | { |
| 5532 | as_warn (_("No .frame pseudo-op used in PIC code")); |
| 5533 | /* Quiet this warning. */ |
| 5534 | mips_frame_reg_valid = 1; |
| 5535 | } |
| 5536 | if (! mips_cprestore_valid) |
| 5537 | { |
| 5538 | as_warn (_("No .cprestore pseudo-op used in PIC code")); |
| 5539 | /* Quiet this warning. */ |
| 5540 | mips_cprestore_valid = 1; |
| 5541 | } |
| 5542 | expr1.X_add_number = mips_cprestore_offset; |
| 5543 | macro_build_ldst_constoffset (&expr1, ADDRESS_LOAD_INSN, |
| 5544 | mips_gp_register, |
| 5545 | mips_frame_reg, |
| 5546 | HAVE_64BIT_ADDRESSES); |
| 5547 | } |
| 5548 | } |
| 5549 | } |
| 5550 | |
| 5551 | break; |
| 5552 | |
| 5553 | case M_JAL_A: |
| 5554 | if (mips_pic == NO_PIC) |
| 5555 | macro_build (&offset_expr, "jal", "a"); |
| 5556 | else if (mips_pic == SVR4_PIC) |
| 5557 | { |
| 5558 | /* If this is a reference to an external symbol, and we are |
| 5559 | using a small GOT, we want |
| 5560 | lw $25,<sym>($gp) (BFD_RELOC_MIPS_CALL16) |
| 5561 | nop |
| 5562 | jalr $ra,$25 |
| 5563 | nop |
| 5564 | lw $gp,cprestore($sp) |
| 5565 | The cprestore value is set using the .cprestore |
| 5566 | pseudo-op. If we are using a big GOT, we want |
| 5567 | lui $25,<sym> (BFD_RELOC_MIPS_CALL_HI16) |
| 5568 | addu $25,$25,$gp |
| 5569 | lw $25,<sym>($25) (BFD_RELOC_MIPS_CALL_LO16) |
| 5570 | nop |
| 5571 | jalr $ra,$25 |
| 5572 | nop |
| 5573 | lw $gp,cprestore($sp) |
| 5574 | If the symbol is not external, we want |
| 5575 | lw $25,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 5576 | nop |
| 5577 | addiu $25,$25,<sym> (BFD_RELOC_LO16) |
| 5578 | jalr $ra,$25 |
| 5579 | nop |
| 5580 | lw $gp,cprestore($sp) |
| 5581 | |
| 5582 | For NewABI, we use the same CALL16 or CALL_HI16/CALL_LO16 |
| 5583 | sequences above, minus nops, unless the symbol is local, |
| 5584 | which enables us to use GOT_PAGE/GOT_OFST (big got) or |
| 5585 | GOT_DISP. */ |
| 5586 | if (HAVE_NEWABI) |
| 5587 | { |
| 5588 | if (! mips_big_got) |
| 5589 | { |
| 5590 | relax_start (offset_expr.X_add_symbol); |
| 5591 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 5592 | PIC_CALL_REG, BFD_RELOC_MIPS_CALL16, |
| 5593 | mips_gp_register); |
| 5594 | relax_switch (); |
| 5595 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 5596 | PIC_CALL_REG, BFD_RELOC_MIPS_GOT_DISP, |
| 5597 | mips_gp_register); |
| 5598 | relax_end (); |
| 5599 | } |
| 5600 | else |
| 5601 | { |
| 5602 | relax_start (offset_expr.X_add_symbol); |
| 5603 | macro_build (&offset_expr, "lui", "t,u", PIC_CALL_REG, |
| 5604 | BFD_RELOC_MIPS_CALL_HI16); |
| 5605 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", PIC_CALL_REG, |
| 5606 | PIC_CALL_REG, mips_gp_register); |
| 5607 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 5608 | PIC_CALL_REG, BFD_RELOC_MIPS_CALL_LO16, |
| 5609 | PIC_CALL_REG); |
| 5610 | relax_switch (); |
| 5611 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 5612 | PIC_CALL_REG, BFD_RELOC_MIPS_GOT_PAGE, |
| 5613 | mips_gp_register); |
| 5614 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 5615 | PIC_CALL_REG, PIC_CALL_REG, |
| 5616 | BFD_RELOC_MIPS_GOT_OFST); |
| 5617 | relax_end (); |
| 5618 | } |
| 5619 | |
| 5620 | macro_build_jalr (&offset_expr); |
| 5621 | } |
| 5622 | else |
| 5623 | { |
| 5624 | relax_start (offset_expr.X_add_symbol); |
| 5625 | if (! mips_big_got) |
| 5626 | { |
| 5627 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 5628 | PIC_CALL_REG, BFD_RELOC_MIPS_CALL16, |
| 5629 | mips_gp_register); |
| 5630 | load_delay_nop (); |
| 5631 | relax_switch (); |
| 5632 | } |
| 5633 | else |
| 5634 | { |
| 5635 | int gpdelay; |
| 5636 | |
| 5637 | gpdelay = reg_needs_delay (mips_gp_register); |
| 5638 | macro_build (&offset_expr, "lui", "t,u", PIC_CALL_REG, |
| 5639 | BFD_RELOC_MIPS_CALL_HI16); |
| 5640 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", PIC_CALL_REG, |
| 5641 | PIC_CALL_REG, mips_gp_register); |
| 5642 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 5643 | PIC_CALL_REG, BFD_RELOC_MIPS_CALL_LO16, |
| 5644 | PIC_CALL_REG); |
| 5645 | load_delay_nop (); |
| 5646 | relax_switch (); |
| 5647 | if (gpdelay) |
| 5648 | macro_build (NULL, "nop", ""); |
| 5649 | } |
| 5650 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 5651 | PIC_CALL_REG, BFD_RELOC_MIPS_GOT16, |
| 5652 | mips_gp_register); |
| 5653 | load_delay_nop (); |
| 5654 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", |
| 5655 | PIC_CALL_REG, PIC_CALL_REG, BFD_RELOC_LO16); |
| 5656 | relax_end (); |
| 5657 | macro_build_jalr (&offset_expr); |
| 5658 | |
| 5659 | if (mips_cprestore_offset < 0) |
| 5660 | as_warn (_("No .cprestore pseudo-op used in PIC code")); |
| 5661 | else |
| 5662 | { |
| 5663 | if (! mips_frame_reg_valid) |
| 5664 | { |
| 5665 | as_warn (_("No .frame pseudo-op used in PIC code")); |
| 5666 | /* Quiet this warning. */ |
| 5667 | mips_frame_reg_valid = 1; |
| 5668 | } |
| 5669 | if (! mips_cprestore_valid) |
| 5670 | { |
| 5671 | as_warn (_("No .cprestore pseudo-op used in PIC code")); |
| 5672 | /* Quiet this warning. */ |
| 5673 | mips_cprestore_valid = 1; |
| 5674 | } |
| 5675 | if (mips_opts.noreorder) |
| 5676 | macro_build (NULL, "nop", ""); |
| 5677 | expr1.X_add_number = mips_cprestore_offset; |
| 5678 | macro_build_ldst_constoffset (&expr1, ADDRESS_LOAD_INSN, |
| 5679 | mips_gp_register, |
| 5680 | mips_frame_reg, |
| 5681 | HAVE_64BIT_ADDRESSES); |
| 5682 | } |
| 5683 | } |
| 5684 | } |
| 5685 | else if (mips_pic == VXWORKS_PIC) |
| 5686 | as_bad (_("Non-PIC jump used in PIC library")); |
| 5687 | else |
| 5688 | abort (); |
| 5689 | |
| 5690 | break; |
| 5691 | |
| 5692 | case M_LB_AB: |
| 5693 | s = "lb"; |
| 5694 | goto ld; |
| 5695 | case M_LBU_AB: |
| 5696 | s = "lbu"; |
| 5697 | goto ld; |
| 5698 | case M_LH_AB: |
| 5699 | s = "lh"; |
| 5700 | goto ld; |
| 5701 | case M_LHU_AB: |
| 5702 | s = "lhu"; |
| 5703 | goto ld; |
| 5704 | case M_LW_AB: |
| 5705 | s = "lw"; |
| 5706 | goto ld; |
| 5707 | case M_LWC0_AB: |
| 5708 | s = "lwc0"; |
| 5709 | /* Itbl support may require additional care here. */ |
| 5710 | coproc = 1; |
| 5711 | goto ld; |
| 5712 | case M_LWC1_AB: |
| 5713 | s = "lwc1"; |
| 5714 | /* Itbl support may require additional care here. */ |
| 5715 | coproc = 1; |
| 5716 | goto ld; |
| 5717 | case M_LWC2_AB: |
| 5718 | s = "lwc2"; |
| 5719 | /* Itbl support may require additional care here. */ |
| 5720 | coproc = 1; |
| 5721 | goto ld; |
| 5722 | case M_LWC3_AB: |
| 5723 | s = "lwc3"; |
| 5724 | /* Itbl support may require additional care here. */ |
| 5725 | coproc = 1; |
| 5726 | goto ld; |
| 5727 | case M_LWL_AB: |
| 5728 | s = "lwl"; |
| 5729 | lr = 1; |
| 5730 | goto ld; |
| 5731 | case M_LWR_AB: |
| 5732 | s = "lwr"; |
| 5733 | lr = 1; |
| 5734 | goto ld; |
| 5735 | case M_LDC1_AB: |
| 5736 | if (mips_opts.arch == CPU_R4650) |
| 5737 | { |
| 5738 | as_bad (_("opcode not supported on this processor")); |
| 5739 | break; |
| 5740 | } |
| 5741 | s = "ldc1"; |
| 5742 | /* Itbl support may require additional care here. */ |
| 5743 | coproc = 1; |
| 5744 | goto ld; |
| 5745 | case M_LDC2_AB: |
| 5746 | s = "ldc2"; |
| 5747 | /* Itbl support may require additional care here. */ |
| 5748 | coproc = 1; |
| 5749 | goto ld; |
| 5750 | case M_LDC3_AB: |
| 5751 | s = "ldc3"; |
| 5752 | /* Itbl support may require additional care here. */ |
| 5753 | coproc = 1; |
| 5754 | goto ld; |
| 5755 | case M_LDL_AB: |
| 5756 | s = "ldl"; |
| 5757 | lr = 1; |
| 5758 | goto ld; |
| 5759 | case M_LDR_AB: |
| 5760 | s = "ldr"; |
| 5761 | lr = 1; |
| 5762 | goto ld; |
| 5763 | case M_LL_AB: |
| 5764 | s = "ll"; |
| 5765 | goto ld; |
| 5766 | case M_LLD_AB: |
| 5767 | s = "lld"; |
| 5768 | goto ld; |
| 5769 | case M_LWU_AB: |
| 5770 | s = "lwu"; |
| 5771 | ld: |
| 5772 | if (breg == treg || coproc || lr) |
| 5773 | { |
| 5774 | tempreg = AT; |
| 5775 | used_at = 1; |
| 5776 | } |
| 5777 | else |
| 5778 | { |
| 5779 | tempreg = treg; |
| 5780 | } |
| 5781 | goto ld_st; |
| 5782 | case M_SB_AB: |
| 5783 | s = "sb"; |
| 5784 | goto st; |
| 5785 | case M_SH_AB: |
| 5786 | s = "sh"; |
| 5787 | goto st; |
| 5788 | case M_SW_AB: |
| 5789 | s = "sw"; |
| 5790 | goto st; |
| 5791 | case M_SWC0_AB: |
| 5792 | s = "swc0"; |
| 5793 | /* Itbl support may require additional care here. */ |
| 5794 | coproc = 1; |
| 5795 | goto st; |
| 5796 | case M_SWC1_AB: |
| 5797 | s = "swc1"; |
| 5798 | /* Itbl support may require additional care here. */ |
| 5799 | coproc = 1; |
| 5800 | goto st; |
| 5801 | case M_SWC2_AB: |
| 5802 | s = "swc2"; |
| 5803 | /* Itbl support may require additional care here. */ |
| 5804 | coproc = 1; |
| 5805 | goto st; |
| 5806 | case M_SWC3_AB: |
| 5807 | s = "swc3"; |
| 5808 | /* Itbl support may require additional care here. */ |
| 5809 | coproc = 1; |
| 5810 | goto st; |
| 5811 | case M_SWL_AB: |
| 5812 | s = "swl"; |
| 5813 | goto st; |
| 5814 | case M_SWR_AB: |
| 5815 | s = "swr"; |
| 5816 | goto st; |
| 5817 | case M_SC_AB: |
| 5818 | s = "sc"; |
| 5819 | goto st; |
| 5820 | case M_SCD_AB: |
| 5821 | s = "scd"; |
| 5822 | goto st; |
| 5823 | case M_SDC1_AB: |
| 5824 | if (mips_opts.arch == CPU_R4650) |
| 5825 | { |
| 5826 | as_bad (_("opcode not supported on this processor")); |
| 5827 | break; |
| 5828 | } |
| 5829 | s = "sdc1"; |
| 5830 | coproc = 1; |
| 5831 | /* Itbl support may require additional care here. */ |
| 5832 | goto st; |
| 5833 | case M_SDC2_AB: |
| 5834 | s = "sdc2"; |
| 5835 | /* Itbl support may require additional care here. */ |
| 5836 | coproc = 1; |
| 5837 | goto st; |
| 5838 | case M_SDC3_AB: |
| 5839 | s = "sdc3"; |
| 5840 | /* Itbl support may require additional care here. */ |
| 5841 | coproc = 1; |
| 5842 | goto st; |
| 5843 | case M_SDL_AB: |
| 5844 | s = "sdl"; |
| 5845 | goto st; |
| 5846 | case M_SDR_AB: |
| 5847 | s = "sdr"; |
| 5848 | st: |
| 5849 | tempreg = AT; |
| 5850 | used_at = 1; |
| 5851 | ld_st: |
| 5852 | /* Itbl support may require additional care here. */ |
| 5853 | if (mask == M_LWC1_AB |
| 5854 | || mask == M_SWC1_AB |
| 5855 | || mask == M_LDC1_AB |
| 5856 | || mask == M_SDC1_AB |
| 5857 | || mask == M_L_DAB |
| 5858 | || mask == M_S_DAB) |
| 5859 | fmt = "T,o(b)"; |
| 5860 | else if (coproc) |
| 5861 | fmt = "E,o(b)"; |
| 5862 | else |
| 5863 | fmt = "t,o(b)"; |
| 5864 | |
| 5865 | if (offset_expr.X_op != O_constant |
| 5866 | && offset_expr.X_op != O_symbol) |
| 5867 | { |
| 5868 | as_bad (_("expression too complex")); |
| 5869 | offset_expr.X_op = O_constant; |
| 5870 | } |
| 5871 | |
| 5872 | if (HAVE_32BIT_ADDRESSES |
| 5873 | && !IS_SEXT_32BIT_NUM (offset_expr.X_add_number)) |
| 5874 | { |
| 5875 | char value [32]; |
| 5876 | |
| 5877 | sprintf_vma (value, offset_expr.X_add_number); |
| 5878 | as_bad (_("Number (0x%s) larger than 32 bits"), value); |
| 5879 | } |
| 5880 | |
| 5881 | /* A constant expression in PIC code can be handled just as it |
| 5882 | is in non PIC code. */ |
| 5883 | if (offset_expr.X_op == O_constant) |
| 5884 | { |
| 5885 | expr1.X_add_number = ((offset_expr.X_add_number + 0x8000) |
| 5886 | & ~(bfd_vma) 0xffff); |
| 5887 | normalize_address_expr (&expr1); |
| 5888 | load_register (tempreg, &expr1, HAVE_64BIT_ADDRESSES); |
| 5889 | if (breg != 0) |
| 5890 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5891 | tempreg, tempreg, breg); |
| 5892 | macro_build (&offset_expr, s, fmt, treg, BFD_RELOC_LO16, tempreg); |
| 5893 | } |
| 5894 | else if (mips_pic == NO_PIC) |
| 5895 | { |
| 5896 | /* If this is a reference to a GP relative symbol, and there |
| 5897 | is no base register, we want |
| 5898 | <op> $treg,<sym>($gp) (BFD_RELOC_GPREL16) |
| 5899 | Otherwise, if there is no base register, we want |
| 5900 | lui $tempreg,<sym> (BFD_RELOC_HI16_S) |
| 5901 | <op> $treg,<sym>($tempreg) (BFD_RELOC_LO16) |
| 5902 | If we have a constant, we need two instructions anyhow, |
| 5903 | so we always use the latter form. |
| 5904 | |
| 5905 | If we have a base register, and this is a reference to a |
| 5906 | GP relative symbol, we want |
| 5907 | addu $tempreg,$breg,$gp |
| 5908 | <op> $treg,<sym>($tempreg) (BFD_RELOC_GPREL16) |
| 5909 | Otherwise we want |
| 5910 | lui $tempreg,<sym> (BFD_RELOC_HI16_S) |
| 5911 | addu $tempreg,$tempreg,$breg |
| 5912 | <op> $treg,<sym>($tempreg) (BFD_RELOC_LO16) |
| 5913 | With a constant we always use the latter case. |
| 5914 | |
| 5915 | With 64bit address space and no base register and $at usable, |
| 5916 | we want |
| 5917 | lui $tempreg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 5918 | lui $at,<sym> (BFD_RELOC_HI16_S) |
| 5919 | daddiu $tempreg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 5920 | dsll32 $tempreg,0 |
| 5921 | daddu $tempreg,$at |
| 5922 | <op> $treg,<sym>($tempreg) (BFD_RELOC_LO16) |
| 5923 | If we have a base register, we want |
| 5924 | lui $tempreg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 5925 | lui $at,<sym> (BFD_RELOC_HI16_S) |
| 5926 | daddiu $tempreg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 5927 | daddu $at,$breg |
| 5928 | dsll32 $tempreg,0 |
| 5929 | daddu $tempreg,$at |
| 5930 | <op> $treg,<sym>($tempreg) (BFD_RELOC_LO16) |
| 5931 | |
| 5932 | Without $at we can't generate the optimal path for superscalar |
| 5933 | processors here since this would require two temporary registers. |
| 5934 | lui $tempreg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 5935 | daddiu $tempreg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 5936 | dsll $tempreg,16 |
| 5937 | daddiu $tempreg,<sym> (BFD_RELOC_HI16_S) |
| 5938 | dsll $tempreg,16 |
| 5939 | <op> $treg,<sym>($tempreg) (BFD_RELOC_LO16) |
| 5940 | If we have a base register, we want |
| 5941 | lui $tempreg,<sym> (BFD_RELOC_MIPS_HIGHEST) |
| 5942 | daddiu $tempreg,<sym> (BFD_RELOC_MIPS_HIGHER) |
| 5943 | dsll $tempreg,16 |
| 5944 | daddiu $tempreg,<sym> (BFD_RELOC_HI16_S) |
| 5945 | dsll $tempreg,16 |
| 5946 | daddu $tempreg,$tempreg,$breg |
| 5947 | <op> $treg,<sym>($tempreg) (BFD_RELOC_LO16) |
| 5948 | |
| 5949 | For GP relative symbols in 64bit address space we can use |
| 5950 | the same sequence as in 32bit address space. */ |
| 5951 | if (HAVE_64BIT_SYMBOLS) |
| 5952 | { |
| 5953 | if ((valueT) offset_expr.X_add_number <= MAX_GPREL_OFFSET |
| 5954 | && !nopic_need_relax (offset_expr.X_add_symbol, 1)) |
| 5955 | { |
| 5956 | relax_start (offset_expr.X_add_symbol); |
| 5957 | if (breg == 0) |
| 5958 | { |
| 5959 | macro_build (&offset_expr, s, fmt, treg, |
| 5960 | BFD_RELOC_GPREL16, mips_gp_register); |
| 5961 | } |
| 5962 | else |
| 5963 | { |
| 5964 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 5965 | tempreg, breg, mips_gp_register); |
| 5966 | macro_build (&offset_expr, s, fmt, treg, |
| 5967 | BFD_RELOC_GPREL16, tempreg); |
| 5968 | } |
| 5969 | relax_switch (); |
| 5970 | } |
| 5971 | |
| 5972 | if (used_at == 0 && !mips_opts.noat) |
| 5973 | { |
| 5974 | macro_build (&offset_expr, "lui", "t,u", tempreg, |
| 5975 | BFD_RELOC_MIPS_HIGHEST); |
| 5976 | macro_build (&offset_expr, "lui", "t,u", AT, |
| 5977 | BFD_RELOC_HI16_S); |
| 5978 | macro_build (&offset_expr, "daddiu", "t,r,j", tempreg, |
| 5979 | tempreg, BFD_RELOC_MIPS_HIGHER); |
| 5980 | if (breg != 0) |
| 5981 | macro_build (NULL, "daddu", "d,v,t", AT, AT, breg); |
| 5982 | macro_build (NULL, "dsll32", "d,w,<", tempreg, tempreg, 0); |
| 5983 | macro_build (NULL, "daddu", "d,v,t", tempreg, tempreg, AT); |
| 5984 | macro_build (&offset_expr, s, fmt, treg, BFD_RELOC_LO16, |
| 5985 | tempreg); |
| 5986 | used_at = 1; |
| 5987 | } |
| 5988 | else |
| 5989 | { |
| 5990 | macro_build (&offset_expr, "lui", "t,u", tempreg, |
| 5991 | BFD_RELOC_MIPS_HIGHEST); |
| 5992 | macro_build (&offset_expr, "daddiu", "t,r,j", tempreg, |
| 5993 | tempreg, BFD_RELOC_MIPS_HIGHER); |
| 5994 | macro_build (NULL, "dsll", "d,w,<", tempreg, tempreg, 16); |
| 5995 | macro_build (&offset_expr, "daddiu", "t,r,j", tempreg, |
| 5996 | tempreg, BFD_RELOC_HI16_S); |
| 5997 | macro_build (NULL, "dsll", "d,w,<", tempreg, tempreg, 16); |
| 5998 | if (breg != 0) |
| 5999 | macro_build (NULL, "daddu", "d,v,t", |
| 6000 | tempreg, tempreg, breg); |
| 6001 | macro_build (&offset_expr, s, fmt, treg, |
| 6002 | BFD_RELOC_LO16, tempreg); |
| 6003 | } |
| 6004 | |
| 6005 | if (mips_relax.sequence) |
| 6006 | relax_end (); |
| 6007 | break; |
| 6008 | } |
| 6009 | |
| 6010 | if (breg == 0) |
| 6011 | { |
| 6012 | if ((valueT) offset_expr.X_add_number <= MAX_GPREL_OFFSET |
| 6013 | && !nopic_need_relax (offset_expr.X_add_symbol, 1)) |
| 6014 | { |
| 6015 | relax_start (offset_expr.X_add_symbol); |
| 6016 | macro_build (&offset_expr, s, fmt, treg, BFD_RELOC_GPREL16, |
| 6017 | mips_gp_register); |
| 6018 | relax_switch (); |
| 6019 | } |
| 6020 | macro_build_lui (&offset_expr, tempreg); |
| 6021 | macro_build (&offset_expr, s, fmt, treg, |
| 6022 | BFD_RELOC_LO16, tempreg); |
| 6023 | if (mips_relax.sequence) |
| 6024 | relax_end (); |
| 6025 | } |
| 6026 | else |
| 6027 | { |
| 6028 | if ((valueT) offset_expr.X_add_number <= MAX_GPREL_OFFSET |
| 6029 | && !nopic_need_relax (offset_expr.X_add_symbol, 1)) |
| 6030 | { |
| 6031 | relax_start (offset_expr.X_add_symbol); |
| 6032 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 6033 | tempreg, breg, mips_gp_register); |
| 6034 | macro_build (&offset_expr, s, fmt, treg, |
| 6035 | BFD_RELOC_GPREL16, tempreg); |
| 6036 | relax_switch (); |
| 6037 | } |
| 6038 | macro_build_lui (&offset_expr, tempreg); |
| 6039 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 6040 | tempreg, tempreg, breg); |
| 6041 | macro_build (&offset_expr, s, fmt, treg, |
| 6042 | BFD_RELOC_LO16, tempreg); |
| 6043 | if (mips_relax.sequence) |
| 6044 | relax_end (); |
| 6045 | } |
| 6046 | } |
| 6047 | else if (!mips_big_got) |
| 6048 | { |
| 6049 | int lw_reloc_type = (int) BFD_RELOC_MIPS_GOT16; |
| 6050 | |
| 6051 | /* If this is a reference to an external symbol, we want |
| 6052 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 6053 | nop |
| 6054 | <op> $treg,0($tempreg) |
| 6055 | Otherwise we want |
| 6056 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 6057 | nop |
| 6058 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) |
| 6059 | <op> $treg,0($tempreg) |
| 6060 | |
| 6061 | For NewABI, we want |
| 6062 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT_PAGE) |
| 6063 | <op> $treg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_OFST) |
| 6064 | |
| 6065 | If there is a base register, we add it to $tempreg before |
| 6066 | the <op>. If there is a constant, we stick it in the |
| 6067 | <op> instruction. We don't handle constants larger than |
| 6068 | 16 bits, because we have no way to load the upper 16 bits |
| 6069 | (actually, we could handle them for the subset of cases |
| 6070 | in which we are not using $at). */ |
| 6071 | assert (offset_expr.X_op == O_symbol); |
| 6072 | if (HAVE_NEWABI) |
| 6073 | { |
| 6074 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 6075 | BFD_RELOC_MIPS_GOT_PAGE, mips_gp_register); |
| 6076 | if (breg != 0) |
| 6077 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 6078 | tempreg, tempreg, breg); |
| 6079 | macro_build (&offset_expr, s, fmt, treg, |
| 6080 | BFD_RELOC_MIPS_GOT_OFST, tempreg); |
| 6081 | break; |
| 6082 | } |
| 6083 | expr1.X_add_number = offset_expr.X_add_number; |
| 6084 | offset_expr.X_add_number = 0; |
| 6085 | if (expr1.X_add_number < -0x8000 |
| 6086 | || expr1.X_add_number >= 0x8000) |
| 6087 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 6088 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 6089 | lw_reloc_type, mips_gp_register); |
| 6090 | load_delay_nop (); |
| 6091 | relax_start (offset_expr.X_add_symbol); |
| 6092 | relax_switch (); |
| 6093 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", tempreg, |
| 6094 | tempreg, BFD_RELOC_LO16); |
| 6095 | relax_end (); |
| 6096 | if (breg != 0) |
| 6097 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 6098 | tempreg, tempreg, breg); |
| 6099 | macro_build (&expr1, s, fmt, treg, BFD_RELOC_LO16, tempreg); |
| 6100 | } |
| 6101 | else if (mips_big_got && !HAVE_NEWABI) |
| 6102 | { |
| 6103 | int gpdelay; |
| 6104 | |
| 6105 | /* If this is a reference to an external symbol, we want |
| 6106 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 6107 | addu $tempreg,$tempreg,$gp |
| 6108 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 6109 | <op> $treg,0($tempreg) |
| 6110 | Otherwise we want |
| 6111 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 6112 | nop |
| 6113 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) |
| 6114 | <op> $treg,0($tempreg) |
| 6115 | If there is a base register, we add it to $tempreg before |
| 6116 | the <op>. If there is a constant, we stick it in the |
| 6117 | <op> instruction. We don't handle constants larger than |
| 6118 | 16 bits, because we have no way to load the upper 16 bits |
| 6119 | (actually, we could handle them for the subset of cases |
| 6120 | in which we are not using $at). */ |
| 6121 | assert (offset_expr.X_op == O_symbol); |
| 6122 | expr1.X_add_number = offset_expr.X_add_number; |
| 6123 | offset_expr.X_add_number = 0; |
| 6124 | if (expr1.X_add_number < -0x8000 |
| 6125 | || expr1.X_add_number >= 0x8000) |
| 6126 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 6127 | gpdelay = reg_needs_delay (mips_gp_register); |
| 6128 | relax_start (offset_expr.X_add_symbol); |
| 6129 | macro_build (&offset_expr, "lui", "t,u", tempreg, |
| 6130 | BFD_RELOC_MIPS_GOT_HI16); |
| 6131 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", tempreg, tempreg, |
| 6132 | mips_gp_register); |
| 6133 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 6134 | BFD_RELOC_MIPS_GOT_LO16, tempreg); |
| 6135 | relax_switch (); |
| 6136 | if (gpdelay) |
| 6137 | macro_build (NULL, "nop", ""); |
| 6138 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 6139 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 6140 | load_delay_nop (); |
| 6141 | macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", tempreg, |
| 6142 | tempreg, BFD_RELOC_LO16); |
| 6143 | relax_end (); |
| 6144 | |
| 6145 | if (breg != 0) |
| 6146 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 6147 | tempreg, tempreg, breg); |
| 6148 | macro_build (&expr1, s, fmt, treg, BFD_RELOC_LO16, tempreg); |
| 6149 | } |
| 6150 | else if (mips_big_got && HAVE_NEWABI) |
| 6151 | { |
| 6152 | /* If this is a reference to an external symbol, we want |
| 6153 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 6154 | add $tempreg,$tempreg,$gp |
| 6155 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) |
| 6156 | <op> $treg,<ofst>($tempreg) |
| 6157 | Otherwise, for local symbols, we want: |
| 6158 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT_PAGE) |
| 6159 | <op> $treg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_OFST) */ |
| 6160 | assert (offset_expr.X_op == O_symbol); |
| 6161 | expr1.X_add_number = offset_expr.X_add_number; |
| 6162 | offset_expr.X_add_number = 0; |
| 6163 | if (expr1.X_add_number < -0x8000 |
| 6164 | || expr1.X_add_number >= 0x8000) |
| 6165 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 6166 | relax_start (offset_expr.X_add_symbol); |
| 6167 | macro_build (&offset_expr, "lui", "t,u", tempreg, |
| 6168 | BFD_RELOC_MIPS_GOT_HI16); |
| 6169 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", tempreg, tempreg, |
| 6170 | mips_gp_register); |
| 6171 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 6172 | BFD_RELOC_MIPS_GOT_LO16, tempreg); |
| 6173 | if (breg != 0) |
| 6174 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 6175 | tempreg, tempreg, breg); |
| 6176 | macro_build (&expr1, s, fmt, treg, BFD_RELOC_LO16, tempreg); |
| 6177 | |
| 6178 | relax_switch (); |
| 6179 | offset_expr.X_add_number = expr1.X_add_number; |
| 6180 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg, |
| 6181 | BFD_RELOC_MIPS_GOT_PAGE, mips_gp_register); |
| 6182 | if (breg != 0) |
| 6183 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 6184 | tempreg, tempreg, breg); |
| 6185 | macro_build (&offset_expr, s, fmt, treg, |
| 6186 | BFD_RELOC_MIPS_GOT_OFST, tempreg); |
| 6187 | relax_end (); |
| 6188 | } |
| 6189 | else |
| 6190 | abort (); |
| 6191 | |
| 6192 | break; |
| 6193 | |
| 6194 | case M_LI: |
| 6195 | case M_LI_S: |
| 6196 | load_register (treg, &imm_expr, 0); |
| 6197 | break; |
| 6198 | |
| 6199 | case M_DLI: |
| 6200 | load_register (treg, &imm_expr, 1); |
| 6201 | break; |
| 6202 | |
| 6203 | case M_LI_SS: |
| 6204 | if (imm_expr.X_op == O_constant) |
| 6205 | { |
| 6206 | used_at = 1; |
| 6207 | load_register (AT, &imm_expr, 0); |
| 6208 | macro_build (NULL, "mtc1", "t,G", AT, treg); |
| 6209 | break; |
| 6210 | } |
| 6211 | else |
| 6212 | { |
| 6213 | assert (offset_expr.X_op == O_symbol |
| 6214 | && strcmp (segment_name (S_GET_SEGMENT |
| 6215 | (offset_expr.X_add_symbol)), |
| 6216 | ".lit4") == 0 |
| 6217 | && offset_expr.X_add_number == 0); |
| 6218 | macro_build (&offset_expr, "lwc1", "T,o(b)", treg, |
| 6219 | BFD_RELOC_MIPS_LITERAL, mips_gp_register); |
| 6220 | break; |
| 6221 | } |
| 6222 | |
| 6223 | case M_LI_D: |
| 6224 | /* Check if we have a constant in IMM_EXPR. If the GPRs are 64 bits |
| 6225 | wide, IMM_EXPR is the entire value. Otherwise IMM_EXPR is the high |
| 6226 | order 32 bits of the value and the low order 32 bits are either |
| 6227 | zero or in OFFSET_EXPR. */ |
| 6228 | if (imm_expr.X_op == O_constant || imm_expr.X_op == O_big) |
| 6229 | { |
| 6230 | if (HAVE_64BIT_GPRS) |
| 6231 | load_register (treg, &imm_expr, 1); |
| 6232 | else |
| 6233 | { |
| 6234 | int hreg, lreg; |
| 6235 | |
| 6236 | if (target_big_endian) |
| 6237 | { |
| 6238 | hreg = treg; |
| 6239 | lreg = treg + 1; |
| 6240 | } |
| 6241 | else |
| 6242 | { |
| 6243 | hreg = treg + 1; |
| 6244 | lreg = treg; |
| 6245 | } |
| 6246 | |
| 6247 | if (hreg <= 31) |
| 6248 | load_register (hreg, &imm_expr, 0); |
| 6249 | if (lreg <= 31) |
| 6250 | { |
| 6251 | if (offset_expr.X_op == O_absent) |
| 6252 | move_register (lreg, 0); |
| 6253 | else |
| 6254 | { |
| 6255 | assert (offset_expr.X_op == O_constant); |
| 6256 | load_register (lreg, &offset_expr, 0); |
| 6257 | } |
| 6258 | } |
| 6259 | } |
| 6260 | break; |
| 6261 | } |
| 6262 | |
| 6263 | /* We know that sym is in the .rdata section. First we get the |
| 6264 | upper 16 bits of the address. */ |
| 6265 | if (mips_pic == NO_PIC) |
| 6266 | { |
| 6267 | macro_build_lui (&offset_expr, AT); |
| 6268 | used_at = 1; |
| 6269 | } |
| 6270 | else |
| 6271 | { |
| 6272 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", AT, |
| 6273 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 6274 | used_at = 1; |
| 6275 | } |
| 6276 | |
| 6277 | /* Now we load the register(s). */ |
| 6278 | if (HAVE_64BIT_GPRS) |
| 6279 | { |
| 6280 | used_at = 1; |
| 6281 | macro_build (&offset_expr, "ld", "t,o(b)", treg, BFD_RELOC_LO16, AT); |
| 6282 | } |
| 6283 | else |
| 6284 | { |
| 6285 | used_at = 1; |
| 6286 | macro_build (&offset_expr, "lw", "t,o(b)", treg, BFD_RELOC_LO16, AT); |
| 6287 | if (treg != RA) |
| 6288 | { |
| 6289 | /* FIXME: How in the world do we deal with the possible |
| 6290 | overflow here? */ |
| 6291 | offset_expr.X_add_number += 4; |
| 6292 | macro_build (&offset_expr, "lw", "t,o(b)", |
| 6293 | treg + 1, BFD_RELOC_LO16, AT); |
| 6294 | } |
| 6295 | } |
| 6296 | break; |
| 6297 | |
| 6298 | case M_LI_DD: |
| 6299 | /* Check if we have a constant in IMM_EXPR. If the FPRs are 64 bits |
| 6300 | wide, IMM_EXPR is the entire value and the GPRs are known to be 64 |
| 6301 | bits wide as well. Otherwise IMM_EXPR is the high order 32 bits of |
| 6302 | the value and the low order 32 bits are either zero or in |
| 6303 | OFFSET_EXPR. */ |
| 6304 | if (imm_expr.X_op == O_constant || imm_expr.X_op == O_big) |
| 6305 | { |
| 6306 | used_at = 1; |
| 6307 | load_register (AT, &imm_expr, HAVE_64BIT_FPRS); |
| 6308 | if (HAVE_64BIT_FPRS) |
| 6309 | { |
| 6310 | assert (HAVE_64BIT_GPRS); |
| 6311 | macro_build (NULL, "dmtc1", "t,S", AT, treg); |
| 6312 | } |
| 6313 | else |
| 6314 | { |
| 6315 | macro_build (NULL, "mtc1", "t,G", AT, treg + 1); |
| 6316 | if (offset_expr.X_op == O_absent) |
| 6317 | macro_build (NULL, "mtc1", "t,G", 0, treg); |
| 6318 | else |
| 6319 | { |
| 6320 | assert (offset_expr.X_op == O_constant); |
| 6321 | load_register (AT, &offset_expr, 0); |
| 6322 | macro_build (NULL, "mtc1", "t,G", AT, treg); |
| 6323 | } |
| 6324 | } |
| 6325 | break; |
| 6326 | } |
| 6327 | |
| 6328 | assert (offset_expr.X_op == O_symbol |
| 6329 | && offset_expr.X_add_number == 0); |
| 6330 | s = segment_name (S_GET_SEGMENT (offset_expr.X_add_symbol)); |
| 6331 | if (strcmp (s, ".lit8") == 0) |
| 6332 | { |
| 6333 | if (mips_opts.isa != ISA_MIPS1) |
| 6334 | { |
| 6335 | macro_build (&offset_expr, "ldc1", "T,o(b)", treg, |
| 6336 | BFD_RELOC_MIPS_LITERAL, mips_gp_register); |
| 6337 | break; |
| 6338 | } |
| 6339 | breg = mips_gp_register; |
| 6340 | r = BFD_RELOC_MIPS_LITERAL; |
| 6341 | goto dob; |
| 6342 | } |
| 6343 | else |
| 6344 | { |
| 6345 | assert (strcmp (s, RDATA_SECTION_NAME) == 0); |
| 6346 | used_at = 1; |
| 6347 | if (mips_pic != NO_PIC) |
| 6348 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", AT, |
| 6349 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 6350 | else |
| 6351 | { |
| 6352 | /* FIXME: This won't work for a 64 bit address. */ |
| 6353 | macro_build_lui (&offset_expr, AT); |
| 6354 | } |
| 6355 | |
| 6356 | if (mips_opts.isa != ISA_MIPS1) |
| 6357 | { |
| 6358 | macro_build (&offset_expr, "ldc1", "T,o(b)", |
| 6359 | treg, BFD_RELOC_LO16, AT); |
| 6360 | break; |
| 6361 | } |
| 6362 | breg = AT; |
| 6363 | r = BFD_RELOC_LO16; |
| 6364 | goto dob; |
| 6365 | } |
| 6366 | |
| 6367 | case M_L_DOB: |
| 6368 | if (mips_opts.arch == CPU_R4650) |
| 6369 | { |
| 6370 | as_bad (_("opcode not supported on this processor")); |
| 6371 | break; |
| 6372 | } |
| 6373 | /* Even on a big endian machine $fn comes before $fn+1. We have |
| 6374 | to adjust when loading from memory. */ |
| 6375 | r = BFD_RELOC_LO16; |
| 6376 | dob: |
| 6377 | assert (mips_opts.isa == ISA_MIPS1); |
| 6378 | macro_build (&offset_expr, "lwc1", "T,o(b)", |
| 6379 | target_big_endian ? treg + 1 : treg, r, breg); |
| 6380 | /* FIXME: A possible overflow which I don't know how to deal |
| 6381 | with. */ |
| 6382 | offset_expr.X_add_number += 4; |
| 6383 | macro_build (&offset_expr, "lwc1", "T,o(b)", |
| 6384 | target_big_endian ? treg : treg + 1, r, breg); |
| 6385 | break; |
| 6386 | |
| 6387 | case M_L_DAB: |
| 6388 | /* |
| 6389 | * The MIPS assembler seems to check for X_add_number not |
| 6390 | * being double aligned and generating: |
| 6391 | * lui at,%hi(foo+1) |
| 6392 | * addu at,at,v1 |
| 6393 | * addiu at,at,%lo(foo+1) |
| 6394 | * lwc1 f2,0(at) |
| 6395 | * lwc1 f3,4(at) |
| 6396 | * But, the resulting address is the same after relocation so why |
| 6397 | * generate the extra instruction? |
| 6398 | */ |
| 6399 | if (mips_opts.arch == CPU_R4650) |
| 6400 | { |
| 6401 | as_bad (_("opcode not supported on this processor")); |
| 6402 | break; |
| 6403 | } |
| 6404 | /* Itbl support may require additional care here. */ |
| 6405 | coproc = 1; |
| 6406 | if (mips_opts.isa != ISA_MIPS1) |
| 6407 | { |
| 6408 | s = "ldc1"; |
| 6409 | goto ld; |
| 6410 | } |
| 6411 | |
| 6412 | s = "lwc1"; |
| 6413 | fmt = "T,o(b)"; |
| 6414 | goto ldd_std; |
| 6415 | |
| 6416 | case M_S_DAB: |
| 6417 | if (mips_opts.arch == CPU_R4650) |
| 6418 | { |
| 6419 | as_bad (_("opcode not supported on this processor")); |
| 6420 | break; |
| 6421 | } |
| 6422 | |
| 6423 | if (mips_opts.isa != ISA_MIPS1) |
| 6424 | { |
| 6425 | s = "sdc1"; |
| 6426 | goto st; |
| 6427 | } |
| 6428 | |
| 6429 | s = "swc1"; |
| 6430 | fmt = "T,o(b)"; |
| 6431 | /* Itbl support may require additional care here. */ |
| 6432 | coproc = 1; |
| 6433 | goto ldd_std; |
| 6434 | |
| 6435 | case M_LD_AB: |
| 6436 | if (HAVE_64BIT_GPRS) |
| 6437 | { |
| 6438 | s = "ld"; |
| 6439 | goto ld; |
| 6440 | } |
| 6441 | |
| 6442 | s = "lw"; |
| 6443 | fmt = "t,o(b)"; |
| 6444 | goto ldd_std; |
| 6445 | |
| 6446 | case M_SD_AB: |
| 6447 | if (HAVE_64BIT_GPRS) |
| 6448 | { |
| 6449 | s = "sd"; |
| 6450 | goto st; |
| 6451 | } |
| 6452 | |
| 6453 | s = "sw"; |
| 6454 | fmt = "t,o(b)"; |
| 6455 | |
| 6456 | ldd_std: |
| 6457 | if (offset_expr.X_op != O_symbol |
| 6458 | && offset_expr.X_op != O_constant) |
| 6459 | { |
| 6460 | as_bad (_("expression too complex")); |
| 6461 | offset_expr.X_op = O_constant; |
| 6462 | } |
| 6463 | |
| 6464 | if (HAVE_32BIT_ADDRESSES |
| 6465 | && !IS_SEXT_32BIT_NUM (offset_expr.X_add_number)) |
| 6466 | { |
| 6467 | char value [32]; |
| 6468 | |
| 6469 | sprintf_vma (value, offset_expr.X_add_number); |
| 6470 | as_bad (_("Number (0x%s) larger than 32 bits"), value); |
| 6471 | } |
| 6472 | |
| 6473 | /* Even on a big endian machine $fn comes before $fn+1. We have |
| 6474 | to adjust when loading from memory. We set coproc if we must |
| 6475 | load $fn+1 first. */ |
| 6476 | /* Itbl support may require additional care here. */ |
| 6477 | if (! target_big_endian) |
| 6478 | coproc = 0; |
| 6479 | |
| 6480 | if (mips_pic == NO_PIC |
| 6481 | || offset_expr.X_op == O_constant) |
| 6482 | { |
| 6483 | /* If this is a reference to a GP relative symbol, we want |
| 6484 | <op> $treg,<sym>($gp) (BFD_RELOC_GPREL16) |
| 6485 | <op> $treg+1,<sym>+4($gp) (BFD_RELOC_GPREL16) |
| 6486 | If we have a base register, we use this |
| 6487 | addu $at,$breg,$gp |
| 6488 | <op> $treg,<sym>($at) (BFD_RELOC_GPREL16) |
| 6489 | <op> $treg+1,<sym>+4($at) (BFD_RELOC_GPREL16) |
| 6490 | If this is not a GP relative symbol, we want |
| 6491 | lui $at,<sym> (BFD_RELOC_HI16_S) |
| 6492 | <op> $treg,<sym>($at) (BFD_RELOC_LO16) |
| 6493 | <op> $treg+1,<sym>+4($at) (BFD_RELOC_LO16) |
| 6494 | If there is a base register, we add it to $at after the |
| 6495 | lui instruction. If there is a constant, we always use |
| 6496 | the last case. */ |
| 6497 | if (offset_expr.X_op == O_symbol |
| 6498 | && (valueT) offset_expr.X_add_number <= MAX_GPREL_OFFSET |
| 6499 | && !nopic_need_relax (offset_expr.X_add_symbol, 1)) |
| 6500 | { |
| 6501 | relax_start (offset_expr.X_add_symbol); |
| 6502 | if (breg == 0) |
| 6503 | { |
| 6504 | tempreg = mips_gp_register; |
| 6505 | } |
| 6506 | else |
| 6507 | { |
| 6508 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 6509 | AT, breg, mips_gp_register); |
| 6510 | tempreg = AT; |
| 6511 | used_at = 1; |
| 6512 | } |
| 6513 | |
| 6514 | /* Itbl support may require additional care here. */ |
| 6515 | macro_build (&offset_expr, s, fmt, coproc ? treg + 1 : treg, |
| 6516 | BFD_RELOC_GPREL16, tempreg); |
| 6517 | offset_expr.X_add_number += 4; |
| 6518 | |
| 6519 | /* Set mips_optimize to 2 to avoid inserting an |
| 6520 | undesired nop. */ |
| 6521 | hold_mips_optimize = mips_optimize; |
| 6522 | mips_optimize = 2; |
| 6523 | /* Itbl support may require additional care here. */ |
| 6524 | macro_build (&offset_expr, s, fmt, coproc ? treg : treg + 1, |
| 6525 | BFD_RELOC_GPREL16, tempreg); |
| 6526 | mips_optimize = hold_mips_optimize; |
| 6527 | |
| 6528 | relax_switch (); |
| 6529 | |
| 6530 | /* We just generated two relocs. When tc_gen_reloc |
| 6531 | handles this case, it will skip the first reloc and |
| 6532 | handle the second. The second reloc already has an |
| 6533 | extra addend of 4, which we added above. We must |
| 6534 | subtract it out, and then subtract another 4 to make |
| 6535 | the first reloc come out right. The second reloc |
| 6536 | will come out right because we are going to add 4 to |
| 6537 | offset_expr when we build its instruction below. |
| 6538 | |
| 6539 | If we have a symbol, then we don't want to include |
| 6540 | the offset, because it will wind up being included |
| 6541 | when we generate the reloc. */ |
| 6542 | |
| 6543 | if (offset_expr.X_op == O_constant) |
| 6544 | offset_expr.X_add_number -= 8; |
| 6545 | else |
| 6546 | { |
| 6547 | offset_expr.X_add_number = -4; |
| 6548 | offset_expr.X_op = O_constant; |
| 6549 | } |
| 6550 | } |
| 6551 | used_at = 1; |
| 6552 | macro_build_lui (&offset_expr, AT); |
| 6553 | if (breg != 0) |
| 6554 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, breg, AT); |
| 6555 | /* Itbl support may require additional care here. */ |
| 6556 | macro_build (&offset_expr, s, fmt, coproc ? treg + 1 : treg, |
| 6557 | BFD_RELOC_LO16, AT); |
| 6558 | /* FIXME: How do we handle overflow here? */ |
| 6559 | offset_expr.X_add_number += 4; |
| 6560 | /* Itbl support may require additional care here. */ |
| 6561 | macro_build (&offset_expr, s, fmt, coproc ? treg : treg + 1, |
| 6562 | BFD_RELOC_LO16, AT); |
| 6563 | if (mips_relax.sequence) |
| 6564 | relax_end (); |
| 6565 | } |
| 6566 | else if (!mips_big_got) |
| 6567 | { |
| 6568 | /* If this is a reference to an external symbol, we want |
| 6569 | lw $at,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 6570 | nop |
| 6571 | <op> $treg,0($at) |
| 6572 | <op> $treg+1,4($at) |
| 6573 | Otherwise we want |
| 6574 | lw $at,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 6575 | nop |
| 6576 | <op> $treg,<sym>($at) (BFD_RELOC_LO16) |
| 6577 | <op> $treg+1,<sym>+4($at) (BFD_RELOC_LO16) |
| 6578 | If there is a base register we add it to $at before the |
| 6579 | lwc1 instructions. If there is a constant we include it |
| 6580 | in the lwc1 instructions. */ |
| 6581 | used_at = 1; |
| 6582 | expr1.X_add_number = offset_expr.X_add_number; |
| 6583 | if (expr1.X_add_number < -0x8000 |
| 6584 | || expr1.X_add_number >= 0x8000 - 4) |
| 6585 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 6586 | load_got_offset (AT, &offset_expr); |
| 6587 | load_delay_nop (); |
| 6588 | if (breg != 0) |
| 6589 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, breg, AT); |
| 6590 | |
| 6591 | /* Set mips_optimize to 2 to avoid inserting an undesired |
| 6592 | nop. */ |
| 6593 | hold_mips_optimize = mips_optimize; |
| 6594 | mips_optimize = 2; |
| 6595 | |
| 6596 | /* Itbl support may require additional care here. */ |
| 6597 | relax_start (offset_expr.X_add_symbol); |
| 6598 | macro_build (&expr1, s, fmt, coproc ? treg + 1 : treg, |
| 6599 | BFD_RELOC_LO16, AT); |
| 6600 | expr1.X_add_number += 4; |
| 6601 | macro_build (&expr1, s, fmt, coproc ? treg : treg + 1, |
| 6602 | BFD_RELOC_LO16, AT); |
| 6603 | relax_switch (); |
| 6604 | macro_build (&offset_expr, s, fmt, coproc ? treg + 1 : treg, |
| 6605 | BFD_RELOC_LO16, AT); |
| 6606 | offset_expr.X_add_number += 4; |
| 6607 | macro_build (&offset_expr, s, fmt, coproc ? treg : treg + 1, |
| 6608 | BFD_RELOC_LO16, AT); |
| 6609 | relax_end (); |
| 6610 | |
| 6611 | mips_optimize = hold_mips_optimize; |
| 6612 | } |
| 6613 | else if (mips_big_got) |
| 6614 | { |
| 6615 | int gpdelay; |
| 6616 | |
| 6617 | /* If this is a reference to an external symbol, we want |
| 6618 | lui $at,<sym> (BFD_RELOC_MIPS_GOT_HI16) |
| 6619 | addu $at,$at,$gp |
| 6620 | lw $at,<sym>($at) (BFD_RELOC_MIPS_GOT_LO16) |
| 6621 | nop |
| 6622 | <op> $treg,0($at) |
| 6623 | <op> $treg+1,4($at) |
| 6624 | Otherwise we want |
| 6625 | lw $at,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
| 6626 | nop |
| 6627 | <op> $treg,<sym>($at) (BFD_RELOC_LO16) |
| 6628 | <op> $treg+1,<sym>+4($at) (BFD_RELOC_LO16) |
| 6629 | If there is a base register we add it to $at before the |
| 6630 | lwc1 instructions. If there is a constant we include it |
| 6631 | in the lwc1 instructions. */ |
| 6632 | used_at = 1; |
| 6633 | expr1.X_add_number = offset_expr.X_add_number; |
| 6634 | offset_expr.X_add_number = 0; |
| 6635 | if (expr1.X_add_number < -0x8000 |
| 6636 | || expr1.X_add_number >= 0x8000 - 4) |
| 6637 | as_bad (_("PIC code offset overflow (max 16 signed bits)")); |
| 6638 | gpdelay = reg_needs_delay (mips_gp_register); |
| 6639 | relax_start (offset_expr.X_add_symbol); |
| 6640 | macro_build (&offset_expr, "lui", "t,u", |
| 6641 | AT, BFD_RELOC_MIPS_GOT_HI16); |
| 6642 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", |
| 6643 | AT, AT, mips_gp_register); |
| 6644 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", |
| 6645 | AT, BFD_RELOC_MIPS_GOT_LO16, AT); |
| 6646 | load_delay_nop (); |
| 6647 | if (breg != 0) |
| 6648 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, breg, AT); |
| 6649 | /* Itbl support may require additional care here. */ |
| 6650 | macro_build (&expr1, s, fmt, coproc ? treg + 1 : treg, |
| 6651 | BFD_RELOC_LO16, AT); |
| 6652 | expr1.X_add_number += 4; |
| 6653 | |
| 6654 | /* Set mips_optimize to 2 to avoid inserting an undesired |
| 6655 | nop. */ |
| 6656 | hold_mips_optimize = mips_optimize; |
| 6657 | mips_optimize = 2; |
| 6658 | /* Itbl support may require additional care here. */ |
| 6659 | macro_build (&expr1, s, fmt, coproc ? treg : treg + 1, |
| 6660 | BFD_RELOC_LO16, AT); |
| 6661 | mips_optimize = hold_mips_optimize; |
| 6662 | expr1.X_add_number -= 4; |
| 6663 | |
| 6664 | relax_switch (); |
| 6665 | offset_expr.X_add_number = expr1.X_add_number; |
| 6666 | if (gpdelay) |
| 6667 | macro_build (NULL, "nop", ""); |
| 6668 | macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", AT, |
| 6669 | BFD_RELOC_MIPS_GOT16, mips_gp_register); |
| 6670 | load_delay_nop (); |
| 6671 | if (breg != 0) |
| 6672 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, breg, AT); |
| 6673 | /* Itbl support may require additional care here. */ |
| 6674 | macro_build (&offset_expr, s, fmt, coproc ? treg + 1 : treg, |
| 6675 | BFD_RELOC_LO16, AT); |
| 6676 | offset_expr.X_add_number += 4; |
| 6677 | |
| 6678 | /* Set mips_optimize to 2 to avoid inserting an undesired |
| 6679 | nop. */ |
| 6680 | hold_mips_optimize = mips_optimize; |
| 6681 | mips_optimize = 2; |
| 6682 | /* Itbl support may require additional care here. */ |
| 6683 | macro_build (&offset_expr, s, fmt, coproc ? treg : treg + 1, |
| 6684 | BFD_RELOC_LO16, AT); |
| 6685 | mips_optimize = hold_mips_optimize; |
| 6686 | relax_end (); |
| 6687 | } |
| 6688 | else |
| 6689 | abort (); |
| 6690 | |
| 6691 | break; |
| 6692 | |
| 6693 | case M_LD_OB: |
| 6694 | s = "lw"; |
| 6695 | goto sd_ob; |
| 6696 | case M_SD_OB: |
| 6697 | s = "sw"; |
| 6698 | sd_ob: |
| 6699 | assert (HAVE_32BIT_ADDRESSES); |
| 6700 | macro_build (&offset_expr, s, "t,o(b)", treg, BFD_RELOC_LO16, breg); |
| 6701 | offset_expr.X_add_number += 4; |
| 6702 | macro_build (&offset_expr, s, "t,o(b)", treg + 1, BFD_RELOC_LO16, breg); |
| 6703 | break; |
| 6704 | |
| 6705 | /* New code added to support COPZ instructions. |
| 6706 | This code builds table entries out of the macros in mip_opcodes. |
| 6707 | R4000 uses interlocks to handle coproc delays. |
| 6708 | Other chips (like the R3000) require nops to be inserted for delays. |
| 6709 | |
| 6710 | FIXME: Currently, we require that the user handle delays. |
| 6711 | In order to fill delay slots for non-interlocked chips, |
| 6712 | we must have a way to specify delays based on the coprocessor. |
| 6713 | Eg. 4 cycles if load coproc reg from memory, 1 if in cache, etc. |
| 6714 | What are the side-effects of the cop instruction? |
| 6715 | What cache support might we have and what are its effects? |
| 6716 | Both coprocessor & memory require delays. how long??? |
| 6717 | What registers are read/set/modified? |
| 6718 | |
| 6719 | If an itbl is provided to interpret cop instructions, |
| 6720 | this knowledge can be encoded in the itbl spec. */ |
| 6721 | |
| 6722 | case M_COP0: |
| 6723 | s = "c0"; |
| 6724 | goto copz; |
| 6725 | case M_COP1: |
| 6726 | s = "c1"; |
| 6727 | goto copz; |
| 6728 | case M_COP2: |
| 6729 | s = "c2"; |
| 6730 | goto copz; |
| 6731 | case M_COP3: |
| 6732 | s = "c3"; |
| 6733 | copz: |
| 6734 | /* For now we just do C (same as Cz). The parameter will be |
| 6735 | stored in insn_opcode by mips_ip. */ |
| 6736 | macro_build (NULL, s, "C", ip->insn_opcode); |
| 6737 | break; |
| 6738 | |
| 6739 | case M_MOVE: |
| 6740 | move_register (dreg, sreg); |
| 6741 | break; |
| 6742 | |
| 6743 | #ifdef LOSING_COMPILER |
| 6744 | default: |
| 6745 | /* Try and see if this is a new itbl instruction. |
| 6746 | This code builds table entries out of the macros in mip_opcodes. |
| 6747 | FIXME: For now we just assemble the expression and pass it's |
| 6748 | value along as a 32-bit immediate. |
| 6749 | We may want to have the assembler assemble this value, |
| 6750 | so that we gain the assembler's knowledge of delay slots, |
| 6751 | symbols, etc. |
| 6752 | Would it be more efficient to use mask (id) here? */ |
| 6753 | if (itbl_have_entries |
| 6754 | && (immed_expr = itbl_assemble (ip->insn_mo->name, ""))) |
| 6755 | { |
| 6756 | s = ip->insn_mo->name; |
| 6757 | s2 = "cop3"; |
| 6758 | coproc = ITBL_DECODE_PNUM (immed_expr);; |
| 6759 | macro_build (&immed_expr, s, "C"); |
| 6760 | break; |
| 6761 | } |
| 6762 | macro2 (ip); |
| 6763 | break; |
| 6764 | } |
| 6765 | if (mips_opts.noat && used_at) |
| 6766 | as_bad (_("Macro used $at after \".set noat\"")); |
| 6767 | } |
| 6768 | |
| 6769 | static void |
| 6770 | macro2 (struct mips_cl_insn *ip) |
| 6771 | { |
| 6772 | register int treg, sreg, dreg, breg; |
| 6773 | int tempreg; |
| 6774 | int mask; |
| 6775 | int used_at; |
| 6776 | expressionS expr1; |
| 6777 | const char *s; |
| 6778 | const char *s2; |
| 6779 | const char *fmt; |
| 6780 | int likely = 0; |
| 6781 | int dbl = 0; |
| 6782 | int coproc = 0; |
| 6783 | int lr = 0; |
| 6784 | int imm = 0; |
| 6785 | int off; |
| 6786 | offsetT maxnum; |
| 6787 | bfd_reloc_code_real_type r; |
| 6788 | |
| 6789 | treg = (ip->insn_opcode >> 16) & 0x1f; |
| 6790 | dreg = (ip->insn_opcode >> 11) & 0x1f; |
| 6791 | sreg = breg = (ip->insn_opcode >> 21) & 0x1f; |
| 6792 | mask = ip->insn_mo->mask; |
| 6793 | |
| 6794 | expr1.X_op = O_constant; |
| 6795 | expr1.X_op_symbol = NULL; |
| 6796 | expr1.X_add_symbol = NULL; |
| 6797 | expr1.X_add_number = 1; |
| 6798 | |
| 6799 | switch (mask) |
| 6800 | { |
| 6801 | #endif /* LOSING_COMPILER */ |
| 6802 | |
| 6803 | case M_DMUL: |
| 6804 | dbl = 1; |
| 6805 | case M_MUL: |
| 6806 | macro_build (NULL, dbl ? "dmultu" : "multu", "s,t", sreg, treg); |
| 6807 | macro_build (NULL, "mflo", "d", dreg); |
| 6808 | break; |
| 6809 | |
| 6810 | case M_DMUL_I: |
| 6811 | dbl = 1; |
| 6812 | case M_MUL_I: |
| 6813 | /* The MIPS assembler some times generates shifts and adds. I'm |
| 6814 | not trying to be that fancy. GCC should do this for us |
| 6815 | anyway. */ |
| 6816 | used_at = 1; |
| 6817 | load_register (AT, &imm_expr, dbl); |
| 6818 | macro_build (NULL, dbl ? "dmult" : "mult", "s,t", sreg, AT); |
| 6819 | macro_build (NULL, "mflo", "d", dreg); |
| 6820 | break; |
| 6821 | |
| 6822 | case M_DMULO_I: |
| 6823 | dbl = 1; |
| 6824 | case M_MULO_I: |
| 6825 | imm = 1; |
| 6826 | goto do_mulo; |
| 6827 | |
| 6828 | case M_DMULO: |
| 6829 | dbl = 1; |
| 6830 | case M_MULO: |
| 6831 | do_mulo: |
| 6832 | start_noreorder (); |
| 6833 | used_at = 1; |
| 6834 | if (imm) |
| 6835 | load_register (AT, &imm_expr, dbl); |
| 6836 | macro_build (NULL, dbl ? "dmult" : "mult", "s,t", sreg, imm ? AT : treg); |
| 6837 | macro_build (NULL, "mflo", "d", dreg); |
| 6838 | macro_build (NULL, dbl ? "dsra32" : "sra", "d,w,<", dreg, dreg, RA); |
| 6839 | macro_build (NULL, "mfhi", "d", AT); |
| 6840 | if (mips_trap) |
| 6841 | macro_build (NULL, "tne", "s,t,q", dreg, AT, 6); |
| 6842 | else |
| 6843 | { |
| 6844 | expr1.X_add_number = 8; |
| 6845 | macro_build (&expr1, "beq", "s,t,p", dreg, AT); |
| 6846 | macro_build (NULL, "nop", "", 0); |
| 6847 | macro_build (NULL, "break", "c", 6); |
| 6848 | } |
| 6849 | end_noreorder (); |
| 6850 | macro_build (NULL, "mflo", "d", dreg); |
| 6851 | break; |
| 6852 | |
| 6853 | case M_DMULOU_I: |
| 6854 | dbl = 1; |
| 6855 | case M_MULOU_I: |
| 6856 | imm = 1; |
| 6857 | goto do_mulou; |
| 6858 | |
| 6859 | case M_DMULOU: |
| 6860 | dbl = 1; |
| 6861 | case M_MULOU: |
| 6862 | do_mulou: |
| 6863 | start_noreorder (); |
| 6864 | used_at = 1; |
| 6865 | if (imm) |
| 6866 | load_register (AT, &imm_expr, dbl); |
| 6867 | macro_build (NULL, dbl ? "dmultu" : "multu", "s,t", |
| 6868 | sreg, imm ? AT : treg); |
| 6869 | macro_build (NULL, "mfhi", "d", AT); |
| 6870 | macro_build (NULL, "mflo", "d", dreg); |
| 6871 | if (mips_trap) |
| 6872 | macro_build (NULL, "tne", "s,t,q", AT, 0, 6); |
| 6873 | else |
| 6874 | { |
| 6875 | expr1.X_add_number = 8; |
| 6876 | macro_build (&expr1, "beq", "s,t,p", AT, 0); |
| 6877 | macro_build (NULL, "nop", "", 0); |
| 6878 | macro_build (NULL, "break", "c", 6); |
| 6879 | } |
| 6880 | end_noreorder (); |
| 6881 | break; |
| 6882 | |
| 6883 | case M_DROL: |
| 6884 | if (ISA_HAS_DROR (mips_opts.isa) || CPU_HAS_DROR (mips_opts.arch)) |
| 6885 | { |
| 6886 | if (dreg == sreg) |
| 6887 | { |
| 6888 | tempreg = AT; |
| 6889 | used_at = 1; |
| 6890 | } |
| 6891 | else |
| 6892 | { |
| 6893 | tempreg = dreg; |
| 6894 | } |
| 6895 | macro_build (NULL, "dnegu", "d,w", tempreg, treg); |
| 6896 | macro_build (NULL, "drorv", "d,t,s", dreg, sreg, tempreg); |
| 6897 | break; |
| 6898 | } |
| 6899 | used_at = 1; |
| 6900 | macro_build (NULL, "dsubu", "d,v,t", AT, 0, treg); |
| 6901 | macro_build (NULL, "dsrlv", "d,t,s", AT, sreg, AT); |
| 6902 | macro_build (NULL, "dsllv", "d,t,s", dreg, sreg, treg); |
| 6903 | macro_build (NULL, "or", "d,v,t", dreg, dreg, AT); |
| 6904 | break; |
| 6905 | |
| 6906 | case M_ROL: |
| 6907 | if (ISA_HAS_ROR (mips_opts.isa) || CPU_HAS_ROR (mips_opts.arch)) |
| 6908 | { |
| 6909 | if (dreg == sreg) |
| 6910 | { |
| 6911 | tempreg = AT; |
| 6912 | used_at = 1; |
| 6913 | } |
| 6914 | else |
| 6915 | { |
| 6916 | tempreg = dreg; |
| 6917 | } |
| 6918 | macro_build (NULL, "negu", "d,w", tempreg, treg); |
| 6919 | macro_build (NULL, "rorv", "d,t,s", dreg, sreg, tempreg); |
| 6920 | break; |
| 6921 | } |
| 6922 | used_at = 1; |
| 6923 | macro_build (NULL, "subu", "d,v,t", AT, 0, treg); |
| 6924 | macro_build (NULL, "srlv", "d,t,s", AT, sreg, AT); |
| 6925 | macro_build (NULL, "sllv", "d,t,s", dreg, sreg, treg); |
| 6926 | macro_build (NULL, "or", "d,v,t", dreg, dreg, AT); |
| 6927 | break; |
| 6928 | |
| 6929 | case M_DROL_I: |
| 6930 | { |
| 6931 | unsigned int rot; |
| 6932 | char *l, *r; |
| 6933 | |
| 6934 | if (imm_expr.X_op != O_constant) |
| 6935 | as_bad (_("Improper rotate count")); |
| 6936 | rot = imm_expr.X_add_number & 0x3f; |
| 6937 | if (ISA_HAS_DROR (mips_opts.isa) || CPU_HAS_DROR (mips_opts.arch)) |
| 6938 | { |
| 6939 | rot = (64 - rot) & 0x3f; |
| 6940 | if (rot >= 32) |
| 6941 | macro_build (NULL, "dror32", "d,w,<", dreg, sreg, rot - 32); |
| 6942 | else |
| 6943 | macro_build (NULL, "dror", "d,w,<", dreg, sreg, rot); |
| 6944 | break; |
| 6945 | } |
| 6946 | if (rot == 0) |
| 6947 | { |
| 6948 | macro_build (NULL, "dsrl", "d,w,<", dreg, sreg, 0); |
| 6949 | break; |
| 6950 | } |
| 6951 | l = (rot < 0x20) ? "dsll" : "dsll32"; |
| 6952 | r = ((0x40 - rot) < 0x20) ? "dsrl" : "dsrl32"; |
| 6953 | rot &= 0x1f; |
| 6954 | used_at = 1; |
| 6955 | macro_build (NULL, l, "d,w,<", AT, sreg, rot); |
| 6956 | macro_build (NULL, r, "d,w,<", dreg, sreg, (0x20 - rot) & 0x1f); |
| 6957 | macro_build (NULL, "or", "d,v,t", dreg, dreg, AT); |
| 6958 | } |
| 6959 | break; |
| 6960 | |
| 6961 | case M_ROL_I: |
| 6962 | { |
| 6963 | unsigned int rot; |
| 6964 | |
| 6965 | if (imm_expr.X_op != O_constant) |
| 6966 | as_bad (_("Improper rotate count")); |
| 6967 | rot = imm_expr.X_add_number & 0x1f; |
| 6968 | if (ISA_HAS_ROR (mips_opts.isa) || CPU_HAS_ROR (mips_opts.arch)) |
| 6969 | { |
| 6970 | macro_build (NULL, "ror", "d,w,<", dreg, sreg, (32 - rot) & 0x1f); |
| 6971 | break; |
| 6972 | } |
| 6973 | if (rot == 0) |
| 6974 | { |
| 6975 | macro_build (NULL, "srl", "d,w,<", dreg, sreg, 0); |
| 6976 | break; |
| 6977 | } |
| 6978 | used_at = 1; |
| 6979 | macro_build (NULL, "sll", "d,w,<", AT, sreg, rot); |
| 6980 | macro_build (NULL, "srl", "d,w,<", dreg, sreg, (0x20 - rot) & 0x1f); |
| 6981 | macro_build (NULL, "or", "d,v,t", dreg, dreg, AT); |
| 6982 | } |
| 6983 | break; |
| 6984 | |
| 6985 | case M_DROR: |
| 6986 | if (ISA_HAS_DROR (mips_opts.isa) || CPU_HAS_DROR (mips_opts.arch)) |
| 6987 | { |
| 6988 | macro_build (NULL, "drorv", "d,t,s", dreg, sreg, treg); |
| 6989 | break; |
| 6990 | } |
| 6991 | used_at = 1; |
| 6992 | macro_build (NULL, "dsubu", "d,v,t", AT, 0, treg); |
| 6993 | macro_build (NULL, "dsllv", "d,t,s", AT, sreg, AT); |
| 6994 | macro_build (NULL, "dsrlv", "d,t,s", dreg, sreg, treg); |
| 6995 | macro_build (NULL, "or", "d,v,t", dreg, dreg, AT); |
| 6996 | break; |
| 6997 | |
| 6998 | case M_ROR: |
| 6999 | if (ISA_HAS_ROR (mips_opts.isa) || CPU_HAS_ROR (mips_opts.arch)) |
| 7000 | { |
| 7001 | macro_build (NULL, "rorv", "d,t,s", dreg, sreg, treg); |
| 7002 | break; |
| 7003 | } |
| 7004 | used_at = 1; |
| 7005 | macro_build (NULL, "subu", "d,v,t", AT, 0, treg); |
| 7006 | macro_build (NULL, "sllv", "d,t,s", AT, sreg, AT); |
| 7007 | macro_build (NULL, "srlv", "d,t,s", dreg, sreg, treg); |
| 7008 | macro_build (NULL, "or", "d,v,t", dreg, dreg, AT); |
| 7009 | break; |
| 7010 | |
| 7011 | case M_DROR_I: |
| 7012 | { |
| 7013 | unsigned int rot; |
| 7014 | char *l, *r; |
| 7015 | |
| 7016 | if (imm_expr.X_op != O_constant) |
| 7017 | as_bad (_("Improper rotate count")); |
| 7018 | rot = imm_expr.X_add_number & 0x3f; |
| 7019 | if (ISA_HAS_DROR (mips_opts.isa) || CPU_HAS_DROR (mips_opts.arch)) |
| 7020 | { |
| 7021 | if (rot >= 32) |
| 7022 | macro_build (NULL, "dror32", "d,w,<", dreg, sreg, rot - 32); |
| 7023 | else |
| 7024 | macro_build (NULL, "dror", "d,w,<", dreg, sreg, rot); |
| 7025 | break; |
| 7026 | } |
| 7027 | if (rot == 0) |
| 7028 | { |
| 7029 | macro_build (NULL, "dsrl", "d,w,<", dreg, sreg, 0); |
| 7030 | break; |
| 7031 | } |
| 7032 | r = (rot < 0x20) ? "dsrl" : "dsrl32"; |
| 7033 | l = ((0x40 - rot) < 0x20) ? "dsll" : "dsll32"; |
| 7034 | rot &= 0x1f; |
| 7035 | used_at = 1; |
| 7036 | macro_build (NULL, r, "d,w,<", AT, sreg, rot); |
| 7037 | macro_build (NULL, l, "d,w,<", dreg, sreg, (0x20 - rot) & 0x1f); |
| 7038 | macro_build (NULL, "or", "d,v,t", dreg, dreg, AT); |
| 7039 | } |
| 7040 | break; |
| 7041 | |
| 7042 | case M_ROR_I: |
| 7043 | { |
| 7044 | unsigned int rot; |
| 7045 | |
| 7046 | if (imm_expr.X_op != O_constant) |
| 7047 | as_bad (_("Improper rotate count")); |
| 7048 | rot = imm_expr.X_add_number & 0x1f; |
| 7049 | if (ISA_HAS_ROR (mips_opts.isa) || CPU_HAS_ROR (mips_opts.arch)) |
| 7050 | { |
| 7051 | macro_build (NULL, "ror", "d,w,<", dreg, sreg, rot); |
| 7052 | break; |
| 7053 | } |
| 7054 | if (rot == 0) |
| 7055 | { |
| 7056 | macro_build (NULL, "srl", "d,w,<", dreg, sreg, 0); |
| 7057 | break; |
| 7058 | } |
| 7059 | used_at = 1; |
| 7060 | macro_build (NULL, "srl", "d,w,<", AT, sreg, rot); |
| 7061 | macro_build (NULL, "sll", "d,w,<", dreg, sreg, (0x20 - rot) & 0x1f); |
| 7062 | macro_build (NULL, "or", "d,v,t", dreg, dreg, AT); |
| 7063 | } |
| 7064 | break; |
| 7065 | |
| 7066 | case M_S_DOB: |
| 7067 | if (mips_opts.arch == CPU_R4650) |
| 7068 | { |
| 7069 | as_bad (_("opcode not supported on this processor")); |
| 7070 | break; |
| 7071 | } |
| 7072 | assert (mips_opts.isa == ISA_MIPS1); |
| 7073 | /* Even on a big endian machine $fn comes before $fn+1. We have |
| 7074 | to adjust when storing to memory. */ |
| 7075 | macro_build (&offset_expr, "swc1", "T,o(b)", |
| 7076 | target_big_endian ? treg + 1 : treg, BFD_RELOC_LO16, breg); |
| 7077 | offset_expr.X_add_number += 4; |
| 7078 | macro_build (&offset_expr, "swc1", "T,o(b)", |
| 7079 | target_big_endian ? treg : treg + 1, BFD_RELOC_LO16, breg); |
| 7080 | break; |
| 7081 | |
| 7082 | case M_SEQ: |
| 7083 | if (sreg == 0) |
| 7084 | macro_build (&expr1, "sltiu", "t,r,j", dreg, treg, BFD_RELOC_LO16); |
| 7085 | else if (treg == 0) |
| 7086 | macro_build (&expr1, "sltiu", "t,r,j", dreg, sreg, BFD_RELOC_LO16); |
| 7087 | else |
| 7088 | { |
| 7089 | macro_build (NULL, "xor", "d,v,t", dreg, sreg, treg); |
| 7090 | macro_build (&expr1, "sltiu", "t,r,j", dreg, dreg, BFD_RELOC_LO16); |
| 7091 | } |
| 7092 | break; |
| 7093 | |
| 7094 | case M_SEQ_I: |
| 7095 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 0) |
| 7096 | { |
| 7097 | macro_build (&expr1, "sltiu", "t,r,j", dreg, sreg, BFD_RELOC_LO16); |
| 7098 | break; |
| 7099 | } |
| 7100 | if (sreg == 0) |
| 7101 | { |
| 7102 | as_warn (_("Instruction %s: result is always false"), |
| 7103 | ip->insn_mo->name); |
| 7104 | move_register (dreg, 0); |
| 7105 | break; |
| 7106 | } |
| 7107 | if (imm_expr.X_op == O_constant |
| 7108 | && imm_expr.X_add_number >= 0 |
| 7109 | && imm_expr.X_add_number < 0x10000) |
| 7110 | { |
| 7111 | macro_build (&imm_expr, "xori", "t,r,i", dreg, sreg, BFD_RELOC_LO16); |
| 7112 | } |
| 7113 | else if (imm_expr.X_op == O_constant |
| 7114 | && imm_expr.X_add_number > -0x8000 |
| 7115 | && imm_expr.X_add_number < 0) |
| 7116 | { |
| 7117 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 7118 | macro_build (&imm_expr, HAVE_32BIT_GPRS ? "addiu" : "daddiu", |
| 7119 | "t,r,j", dreg, sreg, BFD_RELOC_LO16); |
| 7120 | } |
| 7121 | else |
| 7122 | { |
| 7123 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 7124 | macro_build (NULL, "xor", "d,v,t", dreg, sreg, AT); |
| 7125 | used_at = 1; |
| 7126 | } |
| 7127 | macro_build (&expr1, "sltiu", "t,r,j", dreg, dreg, BFD_RELOC_LO16); |
| 7128 | break; |
| 7129 | |
| 7130 | case M_SGE: /* sreg >= treg <==> not (sreg < treg) */ |
| 7131 | s = "slt"; |
| 7132 | goto sge; |
| 7133 | case M_SGEU: |
| 7134 | s = "sltu"; |
| 7135 | sge: |
| 7136 | macro_build (NULL, s, "d,v,t", dreg, sreg, treg); |
| 7137 | macro_build (&expr1, "xori", "t,r,i", dreg, dreg, BFD_RELOC_LO16); |
| 7138 | break; |
| 7139 | |
| 7140 | case M_SGE_I: /* sreg >= I <==> not (sreg < I) */ |
| 7141 | case M_SGEU_I: |
| 7142 | if (imm_expr.X_op == O_constant |
| 7143 | && imm_expr.X_add_number >= -0x8000 |
| 7144 | && imm_expr.X_add_number < 0x8000) |
| 7145 | { |
| 7146 | macro_build (&imm_expr, mask == M_SGE_I ? "slti" : "sltiu", "t,r,j", |
| 7147 | dreg, sreg, BFD_RELOC_LO16); |
| 7148 | } |
| 7149 | else |
| 7150 | { |
| 7151 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 7152 | macro_build (NULL, mask == M_SGE_I ? "slt" : "sltu", "d,v,t", |
| 7153 | dreg, sreg, AT); |
| 7154 | used_at = 1; |
| 7155 | } |
| 7156 | macro_build (&expr1, "xori", "t,r,i", dreg, dreg, BFD_RELOC_LO16); |
| 7157 | break; |
| 7158 | |
| 7159 | case M_SGT: /* sreg > treg <==> treg < sreg */ |
| 7160 | s = "slt"; |
| 7161 | goto sgt; |
| 7162 | case M_SGTU: |
| 7163 | s = "sltu"; |
| 7164 | sgt: |
| 7165 | macro_build (NULL, s, "d,v,t", dreg, treg, sreg); |
| 7166 | break; |
| 7167 | |
| 7168 | case M_SGT_I: /* sreg > I <==> I < sreg */ |
| 7169 | s = "slt"; |
| 7170 | goto sgti; |
| 7171 | case M_SGTU_I: |
| 7172 | s = "sltu"; |
| 7173 | sgti: |
| 7174 | used_at = 1; |
| 7175 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 7176 | macro_build (NULL, s, "d,v,t", dreg, AT, sreg); |
| 7177 | break; |
| 7178 | |
| 7179 | case M_SLE: /* sreg <= treg <==> treg >= sreg <==> not (treg < sreg) */ |
| 7180 | s = "slt"; |
| 7181 | goto sle; |
| 7182 | case M_SLEU: |
| 7183 | s = "sltu"; |
| 7184 | sle: |
| 7185 | macro_build (NULL, s, "d,v,t", dreg, treg, sreg); |
| 7186 | macro_build (&expr1, "xori", "t,r,i", dreg, dreg, BFD_RELOC_LO16); |
| 7187 | break; |
| 7188 | |
| 7189 | case M_SLE_I: /* sreg <= I <==> I >= sreg <==> not (I < sreg) */ |
| 7190 | s = "slt"; |
| 7191 | goto slei; |
| 7192 | case M_SLEU_I: |
| 7193 | s = "sltu"; |
| 7194 | slei: |
| 7195 | used_at = 1; |
| 7196 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 7197 | macro_build (NULL, s, "d,v,t", dreg, AT, sreg); |
| 7198 | macro_build (&expr1, "xori", "t,r,i", dreg, dreg, BFD_RELOC_LO16); |
| 7199 | break; |
| 7200 | |
| 7201 | case M_SLT_I: |
| 7202 | if (imm_expr.X_op == O_constant |
| 7203 | && imm_expr.X_add_number >= -0x8000 |
| 7204 | && imm_expr.X_add_number < 0x8000) |
| 7205 | { |
| 7206 | macro_build (&imm_expr, "slti", "t,r,j", dreg, sreg, BFD_RELOC_LO16); |
| 7207 | break; |
| 7208 | } |
| 7209 | used_at = 1; |
| 7210 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 7211 | macro_build (NULL, "slt", "d,v,t", dreg, sreg, AT); |
| 7212 | break; |
| 7213 | |
| 7214 | case M_SLTU_I: |
| 7215 | if (imm_expr.X_op == O_constant |
| 7216 | && imm_expr.X_add_number >= -0x8000 |
| 7217 | && imm_expr.X_add_number < 0x8000) |
| 7218 | { |
| 7219 | macro_build (&imm_expr, "sltiu", "t,r,j", dreg, sreg, |
| 7220 | BFD_RELOC_LO16); |
| 7221 | break; |
| 7222 | } |
| 7223 | used_at = 1; |
| 7224 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 7225 | macro_build (NULL, "sltu", "d,v,t", dreg, sreg, AT); |
| 7226 | break; |
| 7227 | |
| 7228 | case M_SNE: |
| 7229 | if (sreg == 0) |
| 7230 | macro_build (NULL, "sltu", "d,v,t", dreg, 0, treg); |
| 7231 | else if (treg == 0) |
| 7232 | macro_build (NULL, "sltu", "d,v,t", dreg, 0, sreg); |
| 7233 | else |
| 7234 | { |
| 7235 | macro_build (NULL, "xor", "d,v,t", dreg, sreg, treg); |
| 7236 | macro_build (NULL, "sltu", "d,v,t", dreg, 0, dreg); |
| 7237 | } |
| 7238 | break; |
| 7239 | |
| 7240 | case M_SNE_I: |
| 7241 | if (imm_expr.X_op == O_constant && imm_expr.X_add_number == 0) |
| 7242 | { |
| 7243 | macro_build (NULL, "sltu", "d,v,t", dreg, 0, sreg); |
| 7244 | break; |
| 7245 | } |
| 7246 | if (sreg == 0) |
| 7247 | { |
| 7248 | as_warn (_("Instruction %s: result is always true"), |
| 7249 | ip->insn_mo->name); |
| 7250 | macro_build (&expr1, HAVE_32BIT_GPRS ? "addiu" : "daddiu", "t,r,j", |
| 7251 | dreg, 0, BFD_RELOC_LO16); |
| 7252 | break; |
| 7253 | } |
| 7254 | if (imm_expr.X_op == O_constant |
| 7255 | && imm_expr.X_add_number >= 0 |
| 7256 | && imm_expr.X_add_number < 0x10000) |
| 7257 | { |
| 7258 | macro_build (&imm_expr, "xori", "t,r,i", dreg, sreg, BFD_RELOC_LO16); |
| 7259 | } |
| 7260 | else if (imm_expr.X_op == O_constant |
| 7261 | && imm_expr.X_add_number > -0x8000 |
| 7262 | && imm_expr.X_add_number < 0) |
| 7263 | { |
| 7264 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 7265 | macro_build (&imm_expr, HAVE_32BIT_GPRS ? "addiu" : "daddiu", |
| 7266 | "t,r,j", dreg, sreg, BFD_RELOC_LO16); |
| 7267 | } |
| 7268 | else |
| 7269 | { |
| 7270 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 7271 | macro_build (NULL, "xor", "d,v,t", dreg, sreg, AT); |
| 7272 | used_at = 1; |
| 7273 | } |
| 7274 | macro_build (NULL, "sltu", "d,v,t", dreg, 0, dreg); |
| 7275 | break; |
| 7276 | |
| 7277 | case M_DSUB_I: |
| 7278 | dbl = 1; |
| 7279 | case M_SUB_I: |
| 7280 | if (imm_expr.X_op == O_constant |
| 7281 | && imm_expr.X_add_number > -0x8000 |
| 7282 | && imm_expr.X_add_number <= 0x8000) |
| 7283 | { |
| 7284 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 7285 | macro_build (&imm_expr, dbl ? "daddi" : "addi", "t,r,j", |
| 7286 | dreg, sreg, BFD_RELOC_LO16); |
| 7287 | break; |
| 7288 | } |
| 7289 | used_at = 1; |
| 7290 | load_register (AT, &imm_expr, dbl); |
| 7291 | macro_build (NULL, dbl ? "dsub" : "sub", "d,v,t", dreg, sreg, AT); |
| 7292 | break; |
| 7293 | |
| 7294 | case M_DSUBU_I: |
| 7295 | dbl = 1; |
| 7296 | case M_SUBU_I: |
| 7297 | if (imm_expr.X_op == O_constant |
| 7298 | && imm_expr.X_add_number > -0x8000 |
| 7299 | && imm_expr.X_add_number <= 0x8000) |
| 7300 | { |
| 7301 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 7302 | macro_build (&imm_expr, dbl ? "daddiu" : "addiu", "t,r,j", |
| 7303 | dreg, sreg, BFD_RELOC_LO16); |
| 7304 | break; |
| 7305 | } |
| 7306 | used_at = 1; |
| 7307 | load_register (AT, &imm_expr, dbl); |
| 7308 | macro_build (NULL, dbl ? "dsubu" : "subu", "d,v,t", dreg, sreg, AT); |
| 7309 | break; |
| 7310 | |
| 7311 | case M_TEQ_I: |
| 7312 | s = "teq"; |
| 7313 | goto trap; |
| 7314 | case M_TGE_I: |
| 7315 | s = "tge"; |
| 7316 | goto trap; |
| 7317 | case M_TGEU_I: |
| 7318 | s = "tgeu"; |
| 7319 | goto trap; |
| 7320 | case M_TLT_I: |
| 7321 | s = "tlt"; |
| 7322 | goto trap; |
| 7323 | case M_TLTU_I: |
| 7324 | s = "tltu"; |
| 7325 | goto trap; |
| 7326 | case M_TNE_I: |
| 7327 | s = "tne"; |
| 7328 | trap: |
| 7329 | used_at = 1; |
| 7330 | load_register (AT, &imm_expr, HAVE_64BIT_GPRS); |
| 7331 | macro_build (NULL, s, "s,t", sreg, AT); |
| 7332 | break; |
| 7333 | |
| 7334 | case M_TRUNCWS: |
| 7335 | case M_TRUNCWD: |
| 7336 | assert (mips_opts.isa == ISA_MIPS1); |
| 7337 | used_at = 1; |
| 7338 | sreg = (ip->insn_opcode >> 11) & 0x1f; /* floating reg */ |
| 7339 | dreg = (ip->insn_opcode >> 06) & 0x1f; /* floating reg */ |
| 7340 | |
| 7341 | /* |
| 7342 | * Is the double cfc1 instruction a bug in the mips assembler; |
| 7343 | * or is there a reason for it? |
| 7344 | */ |
| 7345 | start_noreorder (); |
| 7346 | macro_build (NULL, "cfc1", "t,G", treg, RA); |
| 7347 | macro_build (NULL, "cfc1", "t,G", treg, RA); |
| 7348 | macro_build (NULL, "nop", ""); |
| 7349 | expr1.X_add_number = 3; |
| 7350 | macro_build (&expr1, "ori", "t,r,i", AT, treg, BFD_RELOC_LO16); |
| 7351 | expr1.X_add_number = 2; |
| 7352 | macro_build (&expr1, "xori", "t,r,i", AT, AT, BFD_RELOC_LO16); |
| 7353 | macro_build (NULL, "ctc1", "t,G", AT, RA); |
| 7354 | macro_build (NULL, "nop", ""); |
| 7355 | macro_build (NULL, mask == M_TRUNCWD ? "cvt.w.d" : "cvt.w.s", "D,S", |
| 7356 | dreg, sreg); |
| 7357 | macro_build (NULL, "ctc1", "t,G", treg, RA); |
| 7358 | macro_build (NULL, "nop", ""); |
| 7359 | end_noreorder (); |
| 7360 | break; |
| 7361 | |
| 7362 | case M_ULH: |
| 7363 | s = "lb"; |
| 7364 | goto ulh; |
| 7365 | case M_ULHU: |
| 7366 | s = "lbu"; |
| 7367 | ulh: |
| 7368 | used_at = 1; |
| 7369 | if (offset_expr.X_add_number >= 0x7fff) |
| 7370 | as_bad (_("operand overflow")); |
| 7371 | if (! target_big_endian) |
| 7372 | ++offset_expr.X_add_number; |
| 7373 | macro_build (&offset_expr, s, "t,o(b)", AT, BFD_RELOC_LO16, breg); |
| 7374 | if (! target_big_endian) |
| 7375 | --offset_expr.X_add_number; |
| 7376 | else |
| 7377 | ++offset_expr.X_add_number; |
| 7378 | macro_build (&offset_expr, "lbu", "t,o(b)", treg, BFD_RELOC_LO16, breg); |
| 7379 | macro_build (NULL, "sll", "d,w,<", AT, AT, 8); |
| 7380 | macro_build (NULL, "or", "d,v,t", treg, treg, AT); |
| 7381 | break; |
| 7382 | |
| 7383 | case M_ULD: |
| 7384 | s = "ldl"; |
| 7385 | s2 = "ldr"; |
| 7386 | off = 7; |
| 7387 | goto ulw; |
| 7388 | case M_ULW: |
| 7389 | s = "lwl"; |
| 7390 | s2 = "lwr"; |
| 7391 | off = 3; |
| 7392 | ulw: |
| 7393 | if (offset_expr.X_add_number >= 0x8000 - off) |
| 7394 | as_bad (_("operand overflow")); |
| 7395 | if (treg != breg) |
| 7396 | tempreg = treg; |
| 7397 | else |
| 7398 | { |
| 7399 | used_at = 1; |
| 7400 | tempreg = AT; |
| 7401 | } |
| 7402 | if (! target_big_endian) |
| 7403 | offset_expr.X_add_number += off; |
| 7404 | macro_build (&offset_expr, s, "t,o(b)", tempreg, BFD_RELOC_LO16, breg); |
| 7405 | if (! target_big_endian) |
| 7406 | offset_expr.X_add_number -= off; |
| 7407 | else |
| 7408 | offset_expr.X_add_number += off; |
| 7409 | macro_build (&offset_expr, s2, "t,o(b)", tempreg, BFD_RELOC_LO16, breg); |
| 7410 | |
| 7411 | /* If necessary, move the result in tempreg the final destination. */ |
| 7412 | if (treg == tempreg) |
| 7413 | break; |
| 7414 | /* Protect second load's delay slot. */ |
| 7415 | load_delay_nop (); |
| 7416 | move_register (treg, tempreg); |
| 7417 | break; |
| 7418 | |
| 7419 | case M_ULD_A: |
| 7420 | s = "ldl"; |
| 7421 | s2 = "ldr"; |
| 7422 | off = 7; |
| 7423 | goto ulwa; |
| 7424 | case M_ULW_A: |
| 7425 | s = "lwl"; |
| 7426 | s2 = "lwr"; |
| 7427 | off = 3; |
| 7428 | ulwa: |
| 7429 | used_at = 1; |
| 7430 | load_address (AT, &offset_expr, &used_at); |
| 7431 | if (breg != 0) |
| 7432 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, AT, breg); |
| 7433 | if (! target_big_endian) |
| 7434 | expr1.X_add_number = off; |
| 7435 | else |
| 7436 | expr1.X_add_number = 0; |
| 7437 | macro_build (&expr1, s, "t,o(b)", treg, BFD_RELOC_LO16, AT); |
| 7438 | if (! target_big_endian) |
| 7439 | expr1.X_add_number = 0; |
| 7440 | else |
| 7441 | expr1.X_add_number = off; |
| 7442 | macro_build (&expr1, s2, "t,o(b)", treg, BFD_RELOC_LO16, AT); |
| 7443 | break; |
| 7444 | |
| 7445 | case M_ULH_A: |
| 7446 | case M_ULHU_A: |
| 7447 | used_at = 1; |
| 7448 | load_address (AT, &offset_expr, &used_at); |
| 7449 | if (breg != 0) |
| 7450 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, AT, breg); |
| 7451 | if (target_big_endian) |
| 7452 | expr1.X_add_number = 0; |
| 7453 | macro_build (&expr1, mask == M_ULH_A ? "lb" : "lbu", "t,o(b)", |
| 7454 | treg, BFD_RELOC_LO16, AT); |
| 7455 | if (target_big_endian) |
| 7456 | expr1.X_add_number = 1; |
| 7457 | else |
| 7458 | expr1.X_add_number = 0; |
| 7459 | macro_build (&expr1, "lbu", "t,o(b)", AT, BFD_RELOC_LO16, AT); |
| 7460 | macro_build (NULL, "sll", "d,w,<", treg, treg, 8); |
| 7461 | macro_build (NULL, "or", "d,v,t", treg, treg, AT); |
| 7462 | break; |
| 7463 | |
| 7464 | case M_USH: |
| 7465 | used_at = 1; |
| 7466 | if (offset_expr.X_add_number >= 0x7fff) |
| 7467 | as_bad (_("operand overflow")); |
| 7468 | if (target_big_endian) |
| 7469 | ++offset_expr.X_add_number; |
| 7470 | macro_build (&offset_expr, "sb", "t,o(b)", treg, BFD_RELOC_LO16, breg); |
| 7471 | macro_build (NULL, "srl", "d,w,<", AT, treg, 8); |
| 7472 | if (target_big_endian) |
| 7473 | --offset_expr.X_add_number; |
| 7474 | else |
| 7475 | ++offset_expr.X_add_number; |
| 7476 | macro_build (&offset_expr, "sb", "t,o(b)", AT, BFD_RELOC_LO16, breg); |
| 7477 | break; |
| 7478 | |
| 7479 | case M_USD: |
| 7480 | s = "sdl"; |
| 7481 | s2 = "sdr"; |
| 7482 | off = 7; |
| 7483 | goto usw; |
| 7484 | case M_USW: |
| 7485 | s = "swl"; |
| 7486 | s2 = "swr"; |
| 7487 | off = 3; |
| 7488 | usw: |
| 7489 | if (offset_expr.X_add_number >= 0x8000 - off) |
| 7490 | as_bad (_("operand overflow")); |
| 7491 | if (! target_big_endian) |
| 7492 | offset_expr.X_add_number += off; |
| 7493 | macro_build (&offset_expr, s, "t,o(b)", treg, BFD_RELOC_LO16, breg); |
| 7494 | if (! target_big_endian) |
| 7495 | offset_expr.X_add_number -= off; |
| 7496 | else |
| 7497 | offset_expr.X_add_number += off; |
| 7498 | macro_build (&offset_expr, s2, "t,o(b)", treg, BFD_RELOC_LO16, breg); |
| 7499 | break; |
| 7500 | |
| 7501 | case M_USD_A: |
| 7502 | s = "sdl"; |
| 7503 | s2 = "sdr"; |
| 7504 | off = 7; |
| 7505 | goto uswa; |
| 7506 | case M_USW_A: |
| 7507 | s = "swl"; |
| 7508 | s2 = "swr"; |
| 7509 | off = 3; |
| 7510 | uswa: |
| 7511 | used_at = 1; |
| 7512 | load_address (AT, &offset_expr, &used_at); |
| 7513 | if (breg != 0) |
| 7514 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, AT, breg); |
| 7515 | if (! target_big_endian) |
| 7516 | expr1.X_add_number = off; |
| 7517 | else |
| 7518 | expr1.X_add_number = 0; |
| 7519 | macro_build (&expr1, s, "t,o(b)", treg, BFD_RELOC_LO16, AT); |
| 7520 | if (! target_big_endian) |
| 7521 | expr1.X_add_number = 0; |
| 7522 | else |
| 7523 | expr1.X_add_number = off; |
| 7524 | macro_build (&expr1, s2, "t,o(b)", treg, BFD_RELOC_LO16, AT); |
| 7525 | break; |
| 7526 | |
| 7527 | case M_USH_A: |
| 7528 | used_at = 1; |
| 7529 | load_address (AT, &offset_expr, &used_at); |
| 7530 | if (breg != 0) |
| 7531 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, AT, breg); |
| 7532 | if (! target_big_endian) |
| 7533 | expr1.X_add_number = 0; |
| 7534 | macro_build (&expr1, "sb", "t,o(b)", treg, BFD_RELOC_LO16, AT); |
| 7535 | macro_build (NULL, "srl", "d,w,<", treg, treg, 8); |
| 7536 | if (! target_big_endian) |
| 7537 | expr1.X_add_number = 1; |
| 7538 | else |
| 7539 | expr1.X_add_number = 0; |
| 7540 | macro_build (&expr1, "sb", "t,o(b)", treg, BFD_RELOC_LO16, AT); |
| 7541 | if (! target_big_endian) |
| 7542 | expr1.X_add_number = 0; |
| 7543 | else |
| 7544 | expr1.X_add_number = 1; |
| 7545 | macro_build (&expr1, "lbu", "t,o(b)", AT, BFD_RELOC_LO16, AT); |
| 7546 | macro_build (NULL, "sll", "d,w,<", treg, treg, 8); |
| 7547 | macro_build (NULL, "or", "d,v,t", treg, treg, AT); |
| 7548 | break; |
| 7549 | |
| 7550 | default: |
| 7551 | /* FIXME: Check if this is one of the itbl macros, since they |
| 7552 | are added dynamically. */ |
| 7553 | as_bad (_("Macro %s not implemented yet"), ip->insn_mo->name); |
| 7554 | break; |
| 7555 | } |
| 7556 | if (mips_opts.noat && used_at) |
| 7557 | as_bad (_("Macro used $at after \".set noat\"")); |
| 7558 | } |
| 7559 | |
| 7560 | /* Implement macros in mips16 mode. */ |
| 7561 | |
| 7562 | static void |
| 7563 | mips16_macro (struct mips_cl_insn *ip) |
| 7564 | { |
| 7565 | int mask; |
| 7566 | int xreg, yreg, zreg, tmp; |
| 7567 | expressionS expr1; |
| 7568 | int dbl; |
| 7569 | const char *s, *s2, *s3; |
| 7570 | |
| 7571 | mask = ip->insn_mo->mask; |
| 7572 | |
| 7573 | xreg = MIPS16_EXTRACT_OPERAND (RX, *ip); |
| 7574 | yreg = MIPS16_EXTRACT_OPERAND (RY, *ip); |
| 7575 | zreg = MIPS16_EXTRACT_OPERAND (RZ, *ip); |
| 7576 | |
| 7577 | expr1.X_op = O_constant; |
| 7578 | expr1.X_op_symbol = NULL; |
| 7579 | expr1.X_add_symbol = NULL; |
| 7580 | expr1.X_add_number = 1; |
| 7581 | |
| 7582 | dbl = 0; |
| 7583 | |
| 7584 | switch (mask) |
| 7585 | { |
| 7586 | default: |
| 7587 | internalError (); |
| 7588 | |
| 7589 | case M_DDIV_3: |
| 7590 | dbl = 1; |
| 7591 | case M_DIV_3: |
| 7592 | s = "mflo"; |
| 7593 | goto do_div3; |
| 7594 | case M_DREM_3: |
| 7595 | dbl = 1; |
| 7596 | case M_REM_3: |
| 7597 | s = "mfhi"; |
| 7598 | do_div3: |
| 7599 | start_noreorder (); |
| 7600 | macro_build (NULL, dbl ? "ddiv" : "div", "0,x,y", xreg, yreg); |
| 7601 | expr1.X_add_number = 2; |
| 7602 | macro_build (&expr1, "bnez", "x,p", yreg); |
| 7603 | macro_build (NULL, "break", "6", 7); |
| 7604 | |
| 7605 | /* FIXME: The normal code checks for of -1 / -0x80000000 here, |
| 7606 | since that causes an overflow. We should do that as well, |
| 7607 | but I don't see how to do the comparisons without a temporary |
| 7608 | register. */ |
| 7609 | end_noreorder (); |
| 7610 | macro_build (NULL, s, "x", zreg); |
| 7611 | break; |
| 7612 | |
| 7613 | case M_DIVU_3: |
| 7614 | s = "divu"; |
| 7615 | s2 = "mflo"; |
| 7616 | goto do_divu3; |
| 7617 | case M_REMU_3: |
| 7618 | s = "divu"; |
| 7619 | s2 = "mfhi"; |
| 7620 | goto do_divu3; |
| 7621 | case M_DDIVU_3: |
| 7622 | s = "ddivu"; |
| 7623 | s2 = "mflo"; |
| 7624 | goto do_divu3; |
| 7625 | case M_DREMU_3: |
| 7626 | s = "ddivu"; |
| 7627 | s2 = "mfhi"; |
| 7628 | do_divu3: |
| 7629 | start_noreorder (); |
| 7630 | macro_build (NULL, s, "0,x,y", xreg, yreg); |
| 7631 | expr1.X_add_number = 2; |
| 7632 | macro_build (&expr1, "bnez", "x,p", yreg); |
| 7633 | macro_build (NULL, "break", "6", 7); |
| 7634 | end_noreorder (); |
| 7635 | macro_build (NULL, s2, "x", zreg); |
| 7636 | break; |
| 7637 | |
| 7638 | case M_DMUL: |
| 7639 | dbl = 1; |
| 7640 | case M_MUL: |
| 7641 | macro_build (NULL, dbl ? "dmultu" : "multu", "x,y", xreg, yreg); |
| 7642 | macro_build (NULL, "mflo", "x", zreg); |
| 7643 | break; |
| 7644 | |
| 7645 | case M_DSUBU_I: |
| 7646 | dbl = 1; |
| 7647 | goto do_subu; |
| 7648 | case M_SUBU_I: |
| 7649 | do_subu: |
| 7650 | if (imm_expr.X_op != O_constant) |
| 7651 | as_bad (_("Unsupported large constant")); |
| 7652 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 7653 | macro_build (&imm_expr, dbl ? "daddiu" : "addiu", "y,x,4", yreg, xreg); |
| 7654 | break; |
| 7655 | |
| 7656 | case M_SUBU_I_2: |
| 7657 | if (imm_expr.X_op != O_constant) |
| 7658 | as_bad (_("Unsupported large constant")); |
| 7659 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 7660 | macro_build (&imm_expr, "addiu", "x,k", xreg); |
| 7661 | break; |
| 7662 | |
| 7663 | case M_DSUBU_I_2: |
| 7664 | if (imm_expr.X_op != O_constant) |
| 7665 | as_bad (_("Unsupported large constant")); |
| 7666 | imm_expr.X_add_number = -imm_expr.X_add_number; |
| 7667 | macro_build (&imm_expr, "daddiu", "y,j", yreg); |
| 7668 | break; |
| 7669 | |
| 7670 | case M_BEQ: |
| 7671 | s = "cmp"; |
| 7672 | s2 = "bteqz"; |
| 7673 | goto do_branch; |
| 7674 | case M_BNE: |
| 7675 | s = "cmp"; |
| 7676 | s2 = "btnez"; |
| 7677 | goto do_branch; |
| 7678 | case M_BLT: |
| 7679 | s = "slt"; |
| 7680 | s2 = "btnez"; |
| 7681 | goto do_branch; |
| 7682 | case M_BLTU: |
| 7683 | s = "sltu"; |
| 7684 | s2 = "btnez"; |
| 7685 | goto do_branch; |
| 7686 | case M_BLE: |
| 7687 | s = "slt"; |
| 7688 | s2 = "bteqz"; |
| 7689 | goto do_reverse_branch; |
| 7690 | case M_BLEU: |
| 7691 | s = "sltu"; |
| 7692 | s2 = "bteqz"; |
| 7693 | goto do_reverse_branch; |
| 7694 | case M_BGE: |
| 7695 | s = "slt"; |
| 7696 | s2 = "bteqz"; |
| 7697 | goto do_branch; |
| 7698 | case M_BGEU: |
| 7699 | s = "sltu"; |
| 7700 | s2 = "bteqz"; |
| 7701 | goto do_branch; |
| 7702 | case M_BGT: |
| 7703 | s = "slt"; |
| 7704 | s2 = "btnez"; |
| 7705 | goto do_reverse_branch; |
| 7706 | case M_BGTU: |
| 7707 | s = "sltu"; |
| 7708 | s2 = "btnez"; |
| 7709 | |
| 7710 | do_reverse_branch: |
| 7711 | tmp = xreg; |
| 7712 | xreg = yreg; |
| 7713 | yreg = tmp; |
| 7714 | |
| 7715 | do_branch: |
| 7716 | macro_build (NULL, s, "x,y", xreg, yreg); |
| 7717 | macro_build (&offset_expr, s2, "p"); |
| 7718 | break; |
| 7719 | |
| 7720 | case M_BEQ_I: |
| 7721 | s = "cmpi"; |
| 7722 | s2 = "bteqz"; |
| 7723 | s3 = "x,U"; |
| 7724 | goto do_branch_i; |
| 7725 | case M_BNE_I: |
| 7726 | s = "cmpi"; |
| 7727 | s2 = "btnez"; |
| 7728 | s3 = "x,U"; |
| 7729 | goto do_branch_i; |
| 7730 | case M_BLT_I: |
| 7731 | s = "slti"; |
| 7732 | s2 = "btnez"; |
| 7733 | s3 = "x,8"; |
| 7734 | goto do_branch_i; |
| 7735 | case M_BLTU_I: |
| 7736 | s = "sltiu"; |
| 7737 | s2 = "btnez"; |
| 7738 | s3 = "x,8"; |
| 7739 | goto do_branch_i; |
| 7740 | case M_BLE_I: |
| 7741 | s = "slti"; |
| 7742 | s2 = "btnez"; |
| 7743 | s3 = "x,8"; |
| 7744 | goto do_addone_branch_i; |
| 7745 | case M_BLEU_I: |
| 7746 | s = "sltiu"; |
| 7747 | s2 = "btnez"; |
| 7748 | s3 = "x,8"; |
| 7749 | goto do_addone_branch_i; |
| 7750 | case M_BGE_I: |
| 7751 | s = "slti"; |
| 7752 | s2 = "bteqz"; |
| 7753 | s3 = "x,8"; |
| 7754 | goto do_branch_i; |
| 7755 | case M_BGEU_I: |
| 7756 | s = "sltiu"; |
| 7757 | s2 = "bteqz"; |
| 7758 | s3 = "x,8"; |
| 7759 | goto do_branch_i; |
| 7760 | case M_BGT_I: |
| 7761 | s = "slti"; |
| 7762 | s2 = "bteqz"; |
| 7763 | s3 = "x,8"; |
| 7764 | goto do_addone_branch_i; |
| 7765 | case M_BGTU_I: |
| 7766 | s = "sltiu"; |
| 7767 | s2 = "bteqz"; |
| 7768 | s3 = "x,8"; |
| 7769 | |
| 7770 | do_addone_branch_i: |
| 7771 | if (imm_expr.X_op != O_constant) |
| 7772 | as_bad (_("Unsupported large constant")); |
| 7773 | ++imm_expr.X_add_number; |
| 7774 | |
| 7775 | do_branch_i: |
| 7776 | macro_build (&imm_expr, s, s3, xreg); |
| 7777 | macro_build (&offset_expr, s2, "p"); |
| 7778 | break; |
| 7779 | |
| 7780 | case M_ABS: |
| 7781 | expr1.X_add_number = 0; |
| 7782 | macro_build (&expr1, "slti", "x,8", yreg); |
| 7783 | if (xreg != yreg) |
| 7784 | move_register (xreg, yreg); |
| 7785 | expr1.X_add_number = 2; |
| 7786 | macro_build (&expr1, "bteqz", "p"); |
| 7787 | macro_build (NULL, "neg", "x,w", xreg, xreg); |
| 7788 | } |
| 7789 | } |
| 7790 | |
| 7791 | /* For consistency checking, verify that all bits are specified either |
| 7792 | by the match/mask part of the instruction definition, or by the |
| 7793 | operand list. */ |
| 7794 | static int |
| 7795 | validate_mips_insn (const struct mips_opcode *opc) |
| 7796 | { |
| 7797 | const char *p = opc->args; |
| 7798 | char c; |
| 7799 | unsigned long used_bits = opc->mask; |
| 7800 | |
| 7801 | if ((used_bits & opc->match) != opc->match) |
| 7802 | { |
| 7803 | as_bad (_("internal: bad mips opcode (mask error): %s %s"), |
| 7804 | opc->name, opc->args); |
| 7805 | return 0; |
| 7806 | } |
| 7807 | #define USE_BITS(mask,shift) (used_bits |= ((mask) << (shift))) |
| 7808 | while (*p) |
| 7809 | switch (c = *p++) |
| 7810 | { |
| 7811 | case ',': break; |
| 7812 | case '(': break; |
| 7813 | case ')': break; |
| 7814 | case '+': |
| 7815 | switch (c = *p++) |
| 7816 | { |
| 7817 | case '1': USE_BITS (OP_MASK_UDI1, OP_SH_UDI1); break; |
| 7818 | case '2': USE_BITS (OP_MASK_UDI2, OP_SH_UDI2); break; |
| 7819 | case '3': USE_BITS (OP_MASK_UDI3, OP_SH_UDI3); break; |
| 7820 | case '4': USE_BITS (OP_MASK_UDI4, OP_SH_UDI4); break; |
| 7821 | case 'A': USE_BITS (OP_MASK_SHAMT, OP_SH_SHAMT); break; |
| 7822 | case 'B': USE_BITS (OP_MASK_INSMSB, OP_SH_INSMSB); break; |
| 7823 | case 'C': USE_BITS (OP_MASK_EXTMSBD, OP_SH_EXTMSBD); break; |
| 7824 | case 'D': USE_BITS (OP_MASK_RD, OP_SH_RD); |
| 7825 | USE_BITS (OP_MASK_SEL, OP_SH_SEL); break; |
| 7826 | case 'E': USE_BITS (OP_MASK_SHAMT, OP_SH_SHAMT); break; |
| 7827 | case 'F': USE_BITS (OP_MASK_INSMSB, OP_SH_INSMSB); break; |
| 7828 | case 'G': USE_BITS (OP_MASK_EXTMSBD, OP_SH_EXTMSBD); break; |
| 7829 | case 'H': USE_BITS (OP_MASK_EXTMSBD, OP_SH_EXTMSBD); break; |
| 7830 | case 'I': break; |
| 7831 | case 't': USE_BITS (OP_MASK_RT, OP_SH_RT); break; |
| 7832 | case 'T': USE_BITS (OP_MASK_RT, OP_SH_RT); |
| 7833 | USE_BITS (OP_MASK_SEL, OP_SH_SEL); break; |
| 7834 | default: |
| 7835 | as_bad (_("internal: bad mips opcode (unknown extension operand type `+%c'): %s %s"), |
| 7836 | c, opc->name, opc->args); |
| 7837 | return 0; |
| 7838 | } |
| 7839 | break; |
| 7840 | case '<': USE_BITS (OP_MASK_SHAMT, OP_SH_SHAMT); break; |
| 7841 | case '>': USE_BITS (OP_MASK_SHAMT, OP_SH_SHAMT); break; |
| 7842 | case 'A': break; |
| 7843 | case 'B': USE_BITS (OP_MASK_CODE20, OP_SH_CODE20); break; |
| 7844 | case 'C': USE_BITS (OP_MASK_COPZ, OP_SH_COPZ); break; |
| 7845 | case 'D': USE_BITS (OP_MASK_FD, OP_SH_FD); break; |
| 7846 | case 'E': USE_BITS (OP_MASK_RT, OP_SH_RT); break; |
| 7847 | case 'F': break; |
| 7848 | case 'G': USE_BITS (OP_MASK_RD, OP_SH_RD); break; |
| 7849 | case 'H': USE_BITS (OP_MASK_SEL, OP_SH_SEL); break; |
| 7850 | case 'I': break; |
| 7851 | case 'J': USE_BITS (OP_MASK_CODE19, OP_SH_CODE19); break; |
| 7852 | case 'K': USE_BITS (OP_MASK_RD, OP_SH_RD); break; |
| 7853 | case 'L': break; |
| 7854 | case 'M': USE_BITS (OP_MASK_CCC, OP_SH_CCC); break; |
| 7855 | case 'N': USE_BITS (OP_MASK_BCC, OP_SH_BCC); break; |
| 7856 | case 'O': USE_BITS (OP_MASK_ALN, OP_SH_ALN); break; |
| 7857 | case 'Q': USE_BITS (OP_MASK_VSEL, OP_SH_VSEL); |
| 7858 | USE_BITS (OP_MASK_FT, OP_SH_FT); break; |
| 7859 | case 'R': USE_BITS (OP_MASK_FR, OP_SH_FR); break; |
| 7860 | case 'S': USE_BITS (OP_MASK_FS, OP_SH_FS); break; |
| 7861 | case 'T': USE_BITS (OP_MASK_FT, OP_SH_FT); break; |
| 7862 | case 'V': USE_BITS (OP_MASK_FS, OP_SH_FS); break; |
| 7863 | case 'W': USE_BITS (OP_MASK_FT, OP_SH_FT); break; |
| 7864 | case 'X': USE_BITS (OP_MASK_FD, OP_SH_FD); break; |
| 7865 | case 'Y': USE_BITS (OP_MASK_FS, OP_SH_FS); break; |
| 7866 | case 'Z': USE_BITS (OP_MASK_FT, OP_SH_FT); break; |
| 7867 | case 'a': USE_BITS (OP_MASK_TARGET, OP_SH_TARGET); break; |
| 7868 | case 'b': USE_BITS (OP_MASK_RS, OP_SH_RS); break; |
| 7869 | case 'c': USE_BITS (OP_MASK_CODE, OP_SH_CODE); break; |
| 7870 | case 'd': USE_BITS (OP_MASK_RD, OP_SH_RD); break; |
| 7871 | case 'f': break; |
| 7872 | case 'h': USE_BITS (OP_MASK_PREFX, OP_SH_PREFX); break; |
| 7873 | case 'i': USE_BITS (OP_MASK_IMMEDIATE, OP_SH_IMMEDIATE); break; |
| 7874 | case 'j': USE_BITS (OP_MASK_DELTA, OP_SH_DELTA); break; |
| 7875 | case 'k': USE_BITS (OP_MASK_CACHE, OP_SH_CACHE); break; |
| 7876 | case 'l': break; |
| 7877 | case 'o': USE_BITS (OP_MASK_DELTA, OP_SH_DELTA); break; |
| 7878 | case 'p': USE_BITS (OP_MASK_DELTA, OP_SH_DELTA); break; |
| 7879 | case 'q': USE_BITS (OP_MASK_CODE2, OP_SH_CODE2); break; |
| 7880 | case 'r': USE_BITS (OP_MASK_RS, OP_SH_RS); break; |
| 7881 | case 's': USE_BITS (OP_MASK_RS, OP_SH_RS); break; |
| 7882 | case 't': USE_BITS (OP_MASK_RT, OP_SH_RT); break; |
| 7883 | case 'u': USE_BITS (OP_MASK_IMMEDIATE, OP_SH_IMMEDIATE); break; |
| 7884 | case 'v': USE_BITS (OP_MASK_RS, OP_SH_RS); break; |
| 7885 | case 'w': USE_BITS (OP_MASK_RT, OP_SH_RT); break; |
| 7886 | case 'x': break; |
| 7887 | case 'z': break; |
| 7888 | case 'P': USE_BITS (OP_MASK_PERFREG, OP_SH_PERFREG); break; |
| 7889 | case 'U': USE_BITS (OP_MASK_RD, OP_SH_RD); |
| 7890 | USE_BITS (OP_MASK_RT, OP_SH_RT); break; |
| 7891 | case 'e': USE_BITS (OP_MASK_VECBYTE, OP_SH_VECBYTE); break; |
| 7892 | case '%': USE_BITS (OP_MASK_VECALIGN, OP_SH_VECALIGN); break; |
| 7893 | case '[': break; |
| 7894 | case ']': break; |
| 7895 | case '3': USE_BITS (OP_MASK_SA3, OP_SH_SA3); break; |
| 7896 | case '4': USE_BITS (OP_MASK_SA4, OP_SH_SA4); break; |
| 7897 | case '5': USE_BITS (OP_MASK_IMM8, OP_SH_IMM8); break; |
| 7898 | case '6': USE_BITS (OP_MASK_RS, OP_SH_RS); break; |
| 7899 | case '7': USE_BITS (OP_MASK_DSPACC, OP_SH_DSPACC); break; |
| 7900 | case '8': USE_BITS (OP_MASK_WRDSP, OP_SH_WRDSP); break; |
| 7901 | case '9': USE_BITS (OP_MASK_DSPACC_S, OP_SH_DSPACC_S);break; |
| 7902 | case '0': USE_BITS (OP_MASK_DSPSFT, OP_SH_DSPSFT); break; |
| 7903 | case '\'': USE_BITS (OP_MASK_RDDSP, OP_SH_RDDSP); break; |
| 7904 | case ':': USE_BITS (OP_MASK_DSPSFT_7, OP_SH_DSPSFT_7);break; |
| 7905 | case '@': USE_BITS (OP_MASK_IMM10, OP_SH_IMM10); break; |
| 7906 | case '!': USE_BITS (OP_MASK_MT_U, OP_SH_MT_U); break; |
| 7907 | case '$': USE_BITS (OP_MASK_MT_H, OP_SH_MT_H); break; |
| 7908 | case '*': USE_BITS (OP_MASK_MTACC_T, OP_SH_MTACC_T); break; |
| 7909 | case '&': USE_BITS (OP_MASK_MTACC_D, OP_SH_MTACC_D); break; |
| 7910 | case 'g': USE_BITS (OP_MASK_RD, OP_SH_RD); break; |
| 7911 | default: |
| 7912 | as_bad (_("internal: bad mips opcode (unknown operand type `%c'): %s %s"), |
| 7913 | c, opc->name, opc->args); |
| 7914 | return 0; |
| 7915 | } |
| 7916 | #undef USE_BITS |
| 7917 | if (used_bits != 0xffffffff) |
| 7918 | { |
| 7919 | as_bad (_("internal: bad mips opcode (bits 0x%lx undefined): %s %s"), |
| 7920 | ~used_bits & 0xffffffff, opc->name, opc->args); |
| 7921 | return 0; |
| 7922 | } |
| 7923 | return 1; |
| 7924 | } |
| 7925 | |
| 7926 | /* UDI immediates. */ |
| 7927 | struct mips_immed { |
| 7928 | char type; |
| 7929 | unsigned int shift; |
| 7930 | unsigned long mask; |
| 7931 | const char * desc; |
| 7932 | }; |
| 7933 | |
| 7934 | static const struct mips_immed mips_immed[] = { |
| 7935 | { '1', OP_SH_UDI1, OP_MASK_UDI1, 0}, |
| 7936 | { '2', OP_SH_UDI2, OP_MASK_UDI2, 0}, |
| 7937 | { '3', OP_SH_UDI3, OP_MASK_UDI3, 0}, |
| 7938 | { '4', OP_SH_UDI4, OP_MASK_UDI4, 0}, |
| 7939 | { 0,0,0,0 } |
| 7940 | }; |
| 7941 | |
| 7942 | /* This routine assembles an instruction into its binary format. As a |
| 7943 | side effect, it sets one of the global variables imm_reloc or |
| 7944 | offset_reloc to the type of relocation to do if one of the operands |
| 7945 | is an address expression. */ |
| 7946 | |
| 7947 | static void |
| 7948 | mips_ip (char *str, struct mips_cl_insn *ip) |
| 7949 | { |
| 7950 | char *s; |
| 7951 | const char *args; |
| 7952 | char c = 0; |
| 7953 | struct mips_opcode *insn; |
| 7954 | char *argsStart; |
| 7955 | unsigned int regno; |
| 7956 | unsigned int lastregno = 0; |
| 7957 | unsigned int lastpos = 0; |
| 7958 | unsigned int limlo, limhi; |
| 7959 | char *s_reset; |
| 7960 | char save_c = 0; |
| 7961 | offsetT min_range, max_range; |
| 7962 | |
| 7963 | insn_error = NULL; |
| 7964 | |
| 7965 | /* If the instruction contains a '.', we first try to match an instruction |
| 7966 | including the '.'. Then we try again without the '.'. */ |
| 7967 | insn = NULL; |
| 7968 | for (s = str; *s != '\0' && !ISSPACE (*s); ++s) |
| 7969 | continue; |
| 7970 | |
| 7971 | /* If we stopped on whitespace, then replace the whitespace with null for |
| 7972 | the call to hash_find. Save the character we replaced just in case we |
| 7973 | have to re-parse the instruction. */ |
| 7974 | if (ISSPACE (*s)) |
| 7975 | { |
| 7976 | save_c = *s; |
| 7977 | *s++ = '\0'; |
| 7978 | } |
| 7979 | |
| 7980 | insn = (struct mips_opcode *) hash_find (op_hash, str); |
| 7981 | |
| 7982 | /* If we didn't find the instruction in the opcode table, try again, but |
| 7983 | this time with just the instruction up to, but not including the |
| 7984 | first '.'. */ |
| 7985 | if (insn == NULL) |
| 7986 | { |
| 7987 | /* Restore the character we overwrite above (if any). */ |
| 7988 | if (save_c) |
| 7989 | *(--s) = save_c; |
| 7990 | |
| 7991 | /* Scan up to the first '.' or whitespace. */ |
| 7992 | for (s = str; |
| 7993 | *s != '\0' && *s != '.' && !ISSPACE (*s); |
| 7994 | ++s) |
| 7995 | continue; |
| 7996 | |
| 7997 | /* If we did not find a '.', then we can quit now. */ |
| 7998 | if (*s != '.') |
| 7999 | { |
| 8000 | insn_error = "unrecognized opcode"; |
| 8001 | return; |
| 8002 | } |
| 8003 | |
| 8004 | /* Lookup the instruction in the hash table. */ |
| 8005 | *s++ = '\0'; |
| 8006 | if ((insn = (struct mips_opcode *) hash_find (op_hash, str)) == NULL) |
| 8007 | { |
| 8008 | insn_error = "unrecognized opcode"; |
| 8009 | return; |
| 8010 | } |
| 8011 | } |
| 8012 | |
| 8013 | argsStart = s; |
| 8014 | for (;;) |
| 8015 | { |
| 8016 | bfd_boolean ok; |
| 8017 | |
| 8018 | assert (strcmp (insn->name, str) == 0); |
| 8019 | |
| 8020 | if (OPCODE_IS_MEMBER (insn, |
| 8021 | (mips_opts.isa |
| 8022 | | (file_ase_mips16 ? INSN_MIPS16 : 0) |
| 8023 | | (mips_opts.ase_mdmx ? INSN_MDMX : 0) |
| 8024 | | (mips_opts.ase_dsp ? INSN_DSP : 0) |
| 8025 | | (mips_opts.ase_mt ? INSN_MT : 0) |
| 8026 | | (mips_opts.ase_mips3d ? INSN_MIPS3D : 0)), |
| 8027 | mips_opts.arch)) |
| 8028 | ok = TRUE; |
| 8029 | else |
| 8030 | ok = FALSE; |
| 8031 | |
| 8032 | if (insn->pinfo != INSN_MACRO) |
| 8033 | { |
| 8034 | if (mips_opts.arch == CPU_R4650 && (insn->pinfo & FP_D) != 0) |
| 8035 | ok = FALSE; |
| 8036 | } |
| 8037 | |
| 8038 | if (! ok) |
| 8039 | { |
| 8040 | if (insn + 1 < &mips_opcodes[NUMOPCODES] |
| 8041 | && strcmp (insn->name, insn[1].name) == 0) |
| 8042 | { |
| 8043 | ++insn; |
| 8044 | continue; |
| 8045 | } |
| 8046 | else |
| 8047 | { |
| 8048 | if (!insn_error) |
| 8049 | { |
| 8050 | static char buf[100]; |
| 8051 | sprintf (buf, |
| 8052 | _("opcode not supported on this processor: %s (%s)"), |
| 8053 | mips_cpu_info_from_arch (mips_opts.arch)->name, |
| 8054 | mips_cpu_info_from_isa (mips_opts.isa)->name); |
| 8055 | insn_error = buf; |
| 8056 | } |
| 8057 | if (save_c) |
| 8058 | *(--s) = save_c; |
| 8059 | return; |
| 8060 | } |
| 8061 | } |
| 8062 | |
| 8063 | create_insn (ip, insn); |
| 8064 | insn_error = NULL; |
| 8065 | for (args = insn->args;; ++args) |
| 8066 | { |
| 8067 | int is_mdmx; |
| 8068 | |
| 8069 | s += strspn (s, " \t"); |
| 8070 | is_mdmx = 0; |
| 8071 | switch (*args) |
| 8072 | { |
| 8073 | case '\0': /* end of args */ |
| 8074 | if (*s == '\0') |
| 8075 | return; |
| 8076 | break; |
| 8077 | |
| 8078 | case '3': /* dsp 3-bit unsigned immediate in bit 21 */ |
| 8079 | my_getExpression (&imm_expr, s); |
| 8080 | check_absolute_expr (ip, &imm_expr); |
| 8081 | if (imm_expr.X_add_number & ~OP_MASK_SA3) |
| 8082 | { |
| 8083 | as_warn (_("DSP immediate not in range 0..%d (%lu)"), |
| 8084 | OP_MASK_SA3, (unsigned long) imm_expr.X_add_number); |
| 8085 | imm_expr.X_add_number &= OP_MASK_SA3; |
| 8086 | } |
| 8087 | ip->insn_opcode |= imm_expr.X_add_number << OP_SH_SA3; |
| 8088 | imm_expr.X_op = O_absent; |
| 8089 | s = expr_end; |
| 8090 | continue; |
| 8091 | |
| 8092 | case '4': /* dsp 4-bit unsigned immediate in bit 21 */ |
| 8093 | my_getExpression (&imm_expr, s); |
| 8094 | check_absolute_expr (ip, &imm_expr); |
| 8095 | if (imm_expr.X_add_number & ~OP_MASK_SA4) |
| 8096 | { |
| 8097 | as_warn (_("DSP immediate not in range 0..%d (%lu)"), |
| 8098 | OP_MASK_SA4, (unsigned long) imm_expr.X_add_number); |
| 8099 | imm_expr.X_add_number &= OP_MASK_SA4; |
| 8100 | } |
| 8101 | ip->insn_opcode |= imm_expr.X_add_number << OP_SH_SA4; |
| 8102 | imm_expr.X_op = O_absent; |
| 8103 | s = expr_end; |
| 8104 | continue; |
| 8105 | |
| 8106 | case '5': /* dsp 8-bit unsigned immediate in bit 16 */ |
| 8107 | my_getExpression (&imm_expr, s); |
| 8108 | check_absolute_expr (ip, &imm_expr); |
| 8109 | if (imm_expr.X_add_number & ~OP_MASK_IMM8) |
| 8110 | { |
| 8111 | as_warn (_("DSP immediate not in range 0..%d (%lu)"), |
| 8112 | OP_MASK_IMM8, (unsigned long) imm_expr.X_add_number); |
| 8113 | imm_expr.X_add_number &= OP_MASK_IMM8; |
| 8114 | } |
| 8115 | ip->insn_opcode |= imm_expr.X_add_number << OP_SH_IMM8; |
| 8116 | imm_expr.X_op = O_absent; |
| 8117 | s = expr_end; |
| 8118 | continue; |
| 8119 | |
| 8120 | case '6': /* dsp 5-bit unsigned immediate in bit 21 */ |
| 8121 | my_getExpression (&imm_expr, s); |
| 8122 | check_absolute_expr (ip, &imm_expr); |
| 8123 | if (imm_expr.X_add_number & ~OP_MASK_RS) |
| 8124 | { |
| 8125 | as_warn (_("DSP immediate not in range 0..%d (%lu)"), |
| 8126 | OP_MASK_RS, (unsigned long) imm_expr.X_add_number); |
| 8127 | imm_expr.X_add_number &= OP_MASK_RS; |
| 8128 | } |
| 8129 | ip->insn_opcode |= imm_expr.X_add_number << OP_SH_RS; |
| 8130 | imm_expr.X_op = O_absent; |
| 8131 | s = expr_end; |
| 8132 | continue; |
| 8133 | |
| 8134 | case '7': /* four dsp accumulators in bits 11,12 */ |
| 8135 | if (s[0] == '$' && s[1] == 'a' && s[2] == 'c' && |
| 8136 | s[3] >= '0' && s[3] <= '3') |
| 8137 | { |
| 8138 | regno = s[3] - '0'; |
| 8139 | s += 4; |
| 8140 | ip->insn_opcode |= regno << OP_SH_DSPACC; |
| 8141 | continue; |
| 8142 | } |
| 8143 | else |
| 8144 | as_bad (_("Invalid dsp acc register")); |
| 8145 | break; |
| 8146 | |
| 8147 | case '8': /* dsp 6-bit unsigned immediate in bit 11 */ |
| 8148 | my_getExpression (&imm_expr, s); |
| 8149 | check_absolute_expr (ip, &imm_expr); |
| 8150 | if (imm_expr.X_add_number & ~OP_MASK_WRDSP) |
| 8151 | { |
| 8152 | as_warn (_("DSP immediate not in range 0..%d (%lu)"), |
| 8153 | OP_MASK_WRDSP, |
| 8154 | (unsigned long) imm_expr.X_add_number); |
| 8155 | imm_expr.X_add_number &= OP_MASK_WRDSP; |
| 8156 | } |
| 8157 | ip->insn_opcode |= imm_expr.X_add_number << OP_SH_WRDSP; |
| 8158 | imm_expr.X_op = O_absent; |
| 8159 | s = expr_end; |
| 8160 | continue; |
| 8161 | |
| 8162 | case '9': /* four dsp accumulators in bits 21,22 */ |
| 8163 | if (s[0] == '$' && s[1] == 'a' && s[2] == 'c' && |
| 8164 | s[3] >= '0' && s[3] <= '3') |
| 8165 | { |
| 8166 | regno = s[3] - '0'; |
| 8167 | s += 4; |
| 8168 | ip->insn_opcode |= regno << OP_SH_DSPACC_S; |
| 8169 | continue; |
| 8170 | } |
| 8171 | else |
| 8172 | as_bad (_("Invalid dsp acc register")); |
| 8173 | break; |
| 8174 | |
| 8175 | case '0': /* dsp 6-bit signed immediate in bit 20 */ |
| 8176 | my_getExpression (&imm_expr, s); |
| 8177 | check_absolute_expr (ip, &imm_expr); |
| 8178 | min_range = -((OP_MASK_DSPSFT + 1) >> 1); |
| 8179 | max_range = ((OP_MASK_DSPSFT + 1) >> 1) - 1; |
| 8180 | if (imm_expr.X_add_number < min_range || |
| 8181 | imm_expr.X_add_number > max_range) |
| 8182 | { |
| 8183 | as_warn (_("DSP immediate not in range %ld..%ld (%ld)"), |
| 8184 | (long) min_range, (long) max_range, |
| 8185 | (long) imm_expr.X_add_number); |
| 8186 | } |
| 8187 | imm_expr.X_add_number &= OP_MASK_DSPSFT; |
| 8188 | ip->insn_opcode |= ((unsigned long) imm_expr.X_add_number |
| 8189 | << OP_SH_DSPSFT); |
| 8190 | imm_expr.X_op = O_absent; |
| 8191 | s = expr_end; |
| 8192 | continue; |
| 8193 | |
| 8194 | case '\'': /* dsp 6-bit unsigned immediate in bit 16 */ |
| 8195 | my_getExpression (&imm_expr, s); |
| 8196 | check_absolute_expr (ip, &imm_expr); |
| 8197 | if (imm_expr.X_add_number & ~OP_MASK_RDDSP) |
| 8198 | { |
| 8199 | as_warn (_("DSP immediate not in range 0..%d (%lu)"), |
| 8200 | OP_MASK_RDDSP, |
| 8201 | (unsigned long) imm_expr.X_add_number); |
| 8202 | imm_expr.X_add_number &= OP_MASK_RDDSP; |
| 8203 | } |
| 8204 | ip->insn_opcode |= imm_expr.X_add_number << OP_SH_RDDSP; |
| 8205 | imm_expr.X_op = O_absent; |
| 8206 | s = expr_end; |
| 8207 | continue; |
| 8208 | |
| 8209 | case ':': /* dsp 7-bit signed immediate in bit 19 */ |
| 8210 | my_getExpression (&imm_expr, s); |
| 8211 | check_absolute_expr (ip, &imm_expr); |
| 8212 | min_range = -((OP_MASK_DSPSFT_7 + 1) >> 1); |
| 8213 | max_range = ((OP_MASK_DSPSFT_7 + 1) >> 1) - 1; |
| 8214 | if (imm_expr.X_add_number < min_range || |
| 8215 | imm_expr.X_add_number > max_range) |
| 8216 | { |
| 8217 | as_warn (_("DSP immediate not in range %ld..%ld (%ld)"), |
| 8218 | (long) min_range, (long) max_range, |
| 8219 | (long) imm_expr.X_add_number); |
| 8220 | } |
| 8221 | imm_expr.X_add_number &= OP_MASK_DSPSFT_7; |
| 8222 | ip->insn_opcode |= ((unsigned long) imm_expr.X_add_number |
| 8223 | << OP_SH_DSPSFT_7); |
| 8224 | imm_expr.X_op = O_absent; |
| 8225 | s = expr_end; |
| 8226 | continue; |
| 8227 | |
| 8228 | case '@': /* dsp 10-bit signed immediate in bit 16 */ |
| 8229 | my_getExpression (&imm_expr, s); |
| 8230 | check_absolute_expr (ip, &imm_expr); |
| 8231 | min_range = -((OP_MASK_IMM10 + 1) >> 1); |
| 8232 | max_range = ((OP_MASK_IMM10 + 1) >> 1) - 1; |
| 8233 | if (imm_expr.X_add_number < min_range || |
| 8234 | imm_expr.X_add_number > max_range) |
| 8235 | { |
| 8236 | as_warn (_("DSP immediate not in range %ld..%ld (%ld)"), |
| 8237 | (long) min_range, (long) max_range, |
| 8238 | (long) imm_expr.X_add_number); |
| 8239 | } |
| 8240 | imm_expr.X_add_number &= OP_MASK_IMM10; |
| 8241 | ip->insn_opcode |= ((unsigned long) imm_expr.X_add_number |
| 8242 | << OP_SH_IMM10); |
| 8243 | imm_expr.X_op = O_absent; |
| 8244 | s = expr_end; |
| 8245 | continue; |
| 8246 | |
| 8247 | case '!': /* mt 1-bit unsigned immediate in bit 5 */ |
| 8248 | my_getExpression (&imm_expr, s); |
| 8249 | check_absolute_expr (ip, &imm_expr); |
| 8250 | if (imm_expr.X_add_number & ~OP_MASK_MT_U) |
| 8251 | { |
| 8252 | as_warn (_("MT immediate not in range 0..%d (%lu)"), |
| 8253 | OP_MASK_MT_U, (unsigned long) imm_expr.X_add_number); |
| 8254 | imm_expr.X_add_number &= OP_MASK_MT_U; |
| 8255 | } |
| 8256 | ip->insn_opcode |= imm_expr.X_add_number << OP_SH_MT_U; |
| 8257 | imm_expr.X_op = O_absent; |
| 8258 | s = expr_end; |
| 8259 | continue; |
| 8260 | |
| 8261 | case '$': /* mt 1-bit unsigned immediate in bit 4 */ |
| 8262 | my_getExpression (&imm_expr, s); |
| 8263 | check_absolute_expr (ip, &imm_expr); |
| 8264 | if (imm_expr.X_add_number & ~OP_MASK_MT_H) |
| 8265 | { |
| 8266 | as_warn (_("MT immediate not in range 0..%d (%lu)"), |
| 8267 | OP_MASK_MT_H, (unsigned long) imm_expr.X_add_number); |
| 8268 | imm_expr.X_add_number &= OP_MASK_MT_H; |
| 8269 | } |
| 8270 | ip->insn_opcode |= imm_expr.X_add_number << OP_SH_MT_H; |
| 8271 | imm_expr.X_op = O_absent; |
| 8272 | s = expr_end; |
| 8273 | continue; |
| 8274 | |
| 8275 | case '*': /* four dsp accumulators in bits 18,19 */ |
| 8276 | if (s[0] == '$' && s[1] == 'a' && s[2] == 'c' && |
| 8277 | s[3] >= '0' && s[3] <= '3') |
| 8278 | { |
| 8279 | regno = s[3] - '0'; |
| 8280 | s += 4; |
| 8281 | ip->insn_opcode |= regno << OP_SH_MTACC_T; |
| 8282 | continue; |
| 8283 | } |
| 8284 | else |
| 8285 | as_bad (_("Invalid dsp/smartmips acc register")); |
| 8286 | break; |
| 8287 | |
| 8288 | case '&': /* four dsp accumulators in bits 13,14 */ |
| 8289 | if (s[0] == '$' && s[1] == 'a' && s[2] == 'c' && |
| 8290 | s[3] >= '0' && s[3] <= '3') |
| 8291 | { |
| 8292 | regno = s[3] - '0'; |
| 8293 | s += 4; |
| 8294 | ip->insn_opcode |= regno << OP_SH_MTACC_D; |
| 8295 | continue; |
| 8296 | } |
| 8297 | else |
| 8298 | as_bad (_("Invalid dsp/smartmips acc register")); |
| 8299 | break; |
| 8300 | |
| 8301 | case ',': |
| 8302 | if (*s++ == *args) |
| 8303 | continue; |
| 8304 | s--; |
| 8305 | switch (*++args) |
| 8306 | { |
| 8307 | case 'r': |
| 8308 | case 'v': |
| 8309 | INSERT_OPERAND (RS, *ip, lastregno); |
| 8310 | continue; |
| 8311 | |
| 8312 | case 'w': |
| 8313 | INSERT_OPERAND (RT, *ip, lastregno); |
| 8314 | continue; |
| 8315 | |
| 8316 | case 'W': |
| 8317 | INSERT_OPERAND (FT, *ip, lastregno); |
| 8318 | continue; |
| 8319 | |
| 8320 | case 'V': |
| 8321 | INSERT_OPERAND (FS, *ip, lastregno); |
| 8322 | continue; |
| 8323 | } |
| 8324 | break; |
| 8325 | |
| 8326 | case '(': |
| 8327 | /* Handle optional base register. |
| 8328 | Either the base register is omitted or |
| 8329 | we must have a left paren. */ |
| 8330 | /* This is dependent on the next operand specifier |
| 8331 | is a base register specification. */ |
| 8332 | assert (args[1] == 'b' || args[1] == '5' |
| 8333 | || args[1] == '-' || args[1] == '4'); |
| 8334 | if (*s == '\0') |
| 8335 | return; |
| 8336 | |
| 8337 | case ')': /* these must match exactly */ |
| 8338 | case '[': |
| 8339 | case ']': |
| 8340 | if (*s++ == *args) |
| 8341 | continue; |
| 8342 | break; |
| 8343 | |
| 8344 | case '+': /* Opcode extension character. */ |
| 8345 | switch (*++args) |
| 8346 | { |
| 8347 | case '1': /* UDI immediates. */ |
| 8348 | case '2': |
| 8349 | case '3': |
| 8350 | case '4': |
| 8351 | { |
| 8352 | const struct mips_immed *imm = mips_immed; |
| 8353 | |
| 8354 | while (imm->type && imm->type != *args) |
| 8355 | ++imm; |
| 8356 | if (! imm->type) |
| 8357 | internalError (); |
| 8358 | my_getExpression (&imm_expr, s); |
| 8359 | check_absolute_expr (ip, &imm_expr); |
| 8360 | if ((unsigned long) imm_expr.X_add_number & ~imm->mask) |
| 8361 | { |
| 8362 | as_warn (_("Illegal %s number (%lu, 0x%lx)"), |
| 8363 | imm->desc ? imm->desc : ip->insn_mo->name, |
| 8364 | (unsigned long) imm_expr.X_add_number, |
| 8365 | (unsigned long) imm_expr.X_add_number); |
| 8366 | imm_expr.X_add_number &= imm->mask; |
| 8367 | } |
| 8368 | ip->insn_opcode |= ((unsigned long) imm_expr.X_add_number |
| 8369 | << imm->shift); |
| 8370 | imm_expr.X_op = O_absent; |
| 8371 | s = expr_end; |
| 8372 | } |
| 8373 | continue; |
| 8374 | |
| 8375 | case 'A': /* ins/ext position, becomes LSB. */ |
| 8376 | limlo = 0; |
| 8377 | limhi = 31; |
| 8378 | goto do_lsb; |
| 8379 | case 'E': |
| 8380 | limlo = 32; |
| 8381 | limhi = 63; |
| 8382 | goto do_lsb; |
| 8383 | do_lsb: |
| 8384 | my_getExpression (&imm_expr, s); |
| 8385 | check_absolute_expr (ip, &imm_expr); |
| 8386 | if ((unsigned long) imm_expr.X_add_number < limlo |
| 8387 | || (unsigned long) imm_expr.X_add_number > limhi) |
| 8388 | { |
| 8389 | as_bad (_("Improper position (%lu)"), |
| 8390 | (unsigned long) imm_expr.X_add_number); |
| 8391 | imm_expr.X_add_number = limlo; |
| 8392 | } |
| 8393 | lastpos = imm_expr.X_add_number; |
| 8394 | INSERT_OPERAND (SHAMT, *ip, imm_expr.X_add_number); |
| 8395 | imm_expr.X_op = O_absent; |
| 8396 | s = expr_end; |
| 8397 | continue; |
| 8398 | |
| 8399 | case 'B': /* ins size, becomes MSB. */ |
| 8400 | limlo = 1; |
| 8401 | limhi = 32; |
| 8402 | goto do_msb; |
| 8403 | case 'F': |
| 8404 | limlo = 33; |
| 8405 | limhi = 64; |
| 8406 | goto do_msb; |
| 8407 | do_msb: |
| 8408 | my_getExpression (&imm_expr, s); |
| 8409 | check_absolute_expr (ip, &imm_expr); |
| 8410 | /* Check for negative input so that small negative numbers |
| 8411 | will not succeed incorrectly. The checks against |
| 8412 | (pos+size) transitively check "size" itself, |
| 8413 | assuming that "pos" is reasonable. */ |
| 8414 | if ((long) imm_expr.X_add_number < 0 |
| 8415 | || ((unsigned long) imm_expr.X_add_number |
| 8416 | + lastpos) < limlo |
| 8417 | || ((unsigned long) imm_expr.X_add_number |
| 8418 | + lastpos) > limhi) |
| 8419 | { |
| 8420 | as_bad (_("Improper insert size (%lu, position %lu)"), |
| 8421 | (unsigned long) imm_expr.X_add_number, |
| 8422 | (unsigned long) lastpos); |
| 8423 | imm_expr.X_add_number = limlo - lastpos; |
| 8424 | } |
| 8425 | INSERT_OPERAND (INSMSB, *ip, |
| 8426 | lastpos + imm_expr.X_add_number - 1); |
| 8427 | imm_expr.X_op = O_absent; |
| 8428 | s = expr_end; |
| 8429 | continue; |
| 8430 | |
| 8431 | case 'C': /* ext size, becomes MSBD. */ |
| 8432 | limlo = 1; |
| 8433 | limhi = 32; |
| 8434 | goto do_msbd; |
| 8435 | case 'G': |
| 8436 | limlo = 33; |
| 8437 | limhi = 64; |
| 8438 | goto do_msbd; |
| 8439 | case 'H': |
| 8440 | limlo = 33; |
| 8441 | limhi = 64; |
| 8442 | goto do_msbd; |
| 8443 | do_msbd: |
| 8444 | my_getExpression (&imm_expr, s); |
| 8445 | check_absolute_expr (ip, &imm_expr); |
| 8446 | /* Check for negative input so that small negative numbers |
| 8447 | will not succeed incorrectly. The checks against |
| 8448 | (pos+size) transitively check "size" itself, |
| 8449 | assuming that "pos" is reasonable. */ |
| 8450 | if ((long) imm_expr.X_add_number < 0 |
| 8451 | || ((unsigned long) imm_expr.X_add_number |
| 8452 | + lastpos) < limlo |
| 8453 | || ((unsigned long) imm_expr.X_add_number |
| 8454 | + lastpos) > limhi) |
| 8455 | { |
| 8456 | as_bad (_("Improper extract size (%lu, position %lu)"), |
| 8457 | (unsigned long) imm_expr.X_add_number, |
| 8458 | (unsigned long) lastpos); |
| 8459 | imm_expr.X_add_number = limlo - lastpos; |
| 8460 | } |
| 8461 | INSERT_OPERAND (EXTMSBD, *ip, imm_expr.X_add_number - 1); |
| 8462 | imm_expr.X_op = O_absent; |
| 8463 | s = expr_end; |
| 8464 | continue; |
| 8465 | |
| 8466 | case 'D': |
| 8467 | /* +D is for disassembly only; never match. */ |
| 8468 | break; |
| 8469 | |
| 8470 | case 'I': |
| 8471 | /* "+I" is like "I", except that imm2_expr is used. */ |
| 8472 | my_getExpression (&imm2_expr, s); |
| 8473 | if (imm2_expr.X_op != O_big |
| 8474 | && imm2_expr.X_op != O_constant) |
| 8475 | insn_error = _("absolute expression required"); |
| 8476 | if (HAVE_32BIT_GPRS) |
| 8477 | normalize_constant_expr (&imm2_expr); |
| 8478 | s = expr_end; |
| 8479 | continue; |
| 8480 | |
| 8481 | case 'T': /* Coprocessor register */ |
| 8482 | /* +T is for disassembly only; never match. */ |
| 8483 | break; |
| 8484 | |
| 8485 | case 't': /* Coprocessor register number */ |
| 8486 | if (s[0] == '$' && ISDIGIT (s[1])) |
| 8487 | { |
| 8488 | ++s; |
| 8489 | regno = 0; |
| 8490 | do |
| 8491 | { |
| 8492 | regno *= 10; |
| 8493 | regno += *s - '0'; |
| 8494 | ++s; |
| 8495 | } |
| 8496 | while (ISDIGIT (*s)); |
| 8497 | if (regno > 31) |
| 8498 | as_bad (_("Invalid register number (%d)"), regno); |
| 8499 | else |
| 8500 | { |
| 8501 | ip->insn_opcode |= regno << OP_SH_RT; |
| 8502 | continue; |
| 8503 | } |
| 8504 | } |
| 8505 | else |
| 8506 | as_bad (_("Invalid coprocessor 0 register number")); |
| 8507 | break; |
| 8508 | |
| 8509 | default: |
| 8510 | as_bad (_("internal: bad mips opcode (unknown extension operand type `+%c'): %s %s"), |
| 8511 | *args, insn->name, insn->args); |
| 8512 | /* Further processing is fruitless. */ |
| 8513 | return; |
| 8514 | } |
| 8515 | break; |
| 8516 | |
| 8517 | case '<': /* must be at least one digit */ |
| 8518 | /* |
| 8519 | * According to the manual, if the shift amount is greater |
| 8520 | * than 31 or less than 0, then the shift amount should be |
| 8521 | * mod 32. In reality the mips assembler issues an error. |
| 8522 | * We issue a warning and mask out all but the low 5 bits. |
| 8523 | */ |
| 8524 | my_getExpression (&imm_expr, s); |
| 8525 | check_absolute_expr (ip, &imm_expr); |
| 8526 | if ((unsigned long) imm_expr.X_add_number > 31) |
| 8527 | as_warn (_("Improper shift amount (%lu)"), |
| 8528 | (unsigned long) imm_expr.X_add_number); |
| 8529 | INSERT_OPERAND (SHAMT, *ip, imm_expr.X_add_number); |
| 8530 | imm_expr.X_op = O_absent; |
| 8531 | s = expr_end; |
| 8532 | continue; |
| 8533 | |
| 8534 | case '>': /* shift amount minus 32 */ |
| 8535 | my_getExpression (&imm_expr, s); |
| 8536 | check_absolute_expr (ip, &imm_expr); |
| 8537 | if ((unsigned long) imm_expr.X_add_number < 32 |
| 8538 | || (unsigned long) imm_expr.X_add_number > 63) |
| 8539 | break; |
| 8540 | INSERT_OPERAND (SHAMT, *ip, imm_expr.X_add_number - 32); |
| 8541 | imm_expr.X_op = O_absent; |
| 8542 | s = expr_end; |
| 8543 | continue; |
| 8544 | |
| 8545 | case 'k': /* cache code */ |
| 8546 | case 'h': /* prefx code */ |
| 8547 | my_getExpression (&imm_expr, s); |
| 8548 | check_absolute_expr (ip, &imm_expr); |
| 8549 | if ((unsigned long) imm_expr.X_add_number > 31) |
| 8550 | as_warn (_("Invalid value for `%s' (%lu)"), |
| 8551 | ip->insn_mo->name, |
| 8552 | (unsigned long) imm_expr.X_add_number); |
| 8553 | if (*args == 'k') |
| 8554 | INSERT_OPERAND (CACHE, *ip, imm_expr.X_add_number); |
| 8555 | else |
| 8556 | INSERT_OPERAND (PREFX, *ip, imm_expr.X_add_number); |
| 8557 | imm_expr.X_op = O_absent; |
| 8558 | s = expr_end; |
| 8559 | continue; |
| 8560 | |
| 8561 | case 'c': /* break code */ |
| 8562 | my_getExpression (&imm_expr, s); |
| 8563 | check_absolute_expr (ip, &imm_expr); |
| 8564 | if ((unsigned long) imm_expr.X_add_number > 1023) |
| 8565 | as_warn (_("Illegal break code (%lu)"), |
| 8566 | (unsigned long) imm_expr.X_add_number); |
| 8567 | INSERT_OPERAND (CODE, *ip, imm_expr.X_add_number); |
| 8568 | imm_expr.X_op = O_absent; |
| 8569 | s = expr_end; |
| 8570 | continue; |
| 8571 | |
| 8572 | case 'q': /* lower break code */ |
| 8573 | my_getExpression (&imm_expr, s); |
| 8574 | check_absolute_expr (ip, &imm_expr); |
| 8575 | if ((unsigned long) imm_expr.X_add_number > 1023) |
| 8576 | as_warn (_("Illegal lower break code (%lu)"), |
| 8577 | (unsigned long) imm_expr.X_add_number); |
| 8578 | INSERT_OPERAND (CODE2, *ip, imm_expr.X_add_number); |
| 8579 | imm_expr.X_op = O_absent; |
| 8580 | s = expr_end; |
| 8581 | continue; |
| 8582 | |
| 8583 | case 'B': /* 20-bit syscall/break code. */ |
| 8584 | my_getExpression (&imm_expr, s); |
| 8585 | check_absolute_expr (ip, &imm_expr); |
| 8586 | if ((unsigned long) imm_expr.X_add_number > OP_MASK_CODE20) |
| 8587 | as_warn (_("Illegal 20-bit code (%lu)"), |
| 8588 | (unsigned long) imm_expr.X_add_number); |
| 8589 | INSERT_OPERAND (CODE20, *ip, imm_expr.X_add_number); |
| 8590 | imm_expr.X_op = O_absent; |
| 8591 | s = expr_end; |
| 8592 | continue; |
| 8593 | |
| 8594 | case 'C': /* Coprocessor code */ |
| 8595 | my_getExpression (&imm_expr, s); |
| 8596 | check_absolute_expr (ip, &imm_expr); |
| 8597 | if ((unsigned long) imm_expr.X_add_number >= (1 << 25)) |
| 8598 | { |
| 8599 | as_warn (_("Coproccesor code > 25 bits (%lu)"), |
| 8600 | (unsigned long) imm_expr.X_add_number); |
| 8601 | imm_expr.X_add_number &= ((1 << 25) - 1); |
| 8602 | } |
| 8603 | ip->insn_opcode |= imm_expr.X_add_number; |
| 8604 | imm_expr.X_op = O_absent; |
| 8605 | s = expr_end; |
| 8606 | continue; |
| 8607 | |
| 8608 | case 'J': /* 19-bit wait code. */ |
| 8609 | my_getExpression (&imm_expr, s); |
| 8610 | check_absolute_expr (ip, &imm_expr); |
| 8611 | if ((unsigned long) imm_expr.X_add_number > OP_MASK_CODE19) |
| 8612 | as_warn (_("Illegal 19-bit code (%lu)"), |
| 8613 | (unsigned long) imm_expr.X_add_number); |
| 8614 | INSERT_OPERAND (CODE19, *ip, imm_expr.X_add_number); |
| 8615 | imm_expr.X_op = O_absent; |
| 8616 | s = expr_end; |
| 8617 | continue; |
| 8618 | |
| 8619 | case 'P': /* Performance register */ |
| 8620 | my_getExpression (&imm_expr, s); |
| 8621 | check_absolute_expr (ip, &imm_expr); |
| 8622 | if (imm_expr.X_add_number != 0 && imm_expr.X_add_number != 1) |
| 8623 | as_warn (_("Invalid performance register (%lu)"), |
| 8624 | (unsigned long) imm_expr.X_add_number); |
| 8625 | INSERT_OPERAND (PERFREG, *ip, imm_expr.X_add_number); |
| 8626 | imm_expr.X_op = O_absent; |
| 8627 | s = expr_end; |
| 8628 | continue; |
| 8629 | |
| 8630 | case 'b': /* base register */ |
| 8631 | case 'd': /* destination register */ |
| 8632 | case 's': /* source register */ |
| 8633 | case 't': /* target register */ |
| 8634 | case 'r': /* both target and source */ |
| 8635 | case 'v': /* both dest and source */ |
| 8636 | case 'w': /* both dest and target */ |
| 8637 | case 'E': /* coprocessor target register */ |
| 8638 | case 'G': /* coprocessor destination register */ |
| 8639 | case 'K': /* 'rdhwr' destination register */ |
| 8640 | case 'x': /* ignore register name */ |
| 8641 | case 'z': /* must be zero register */ |
| 8642 | case 'U': /* destination register (clo/clz). */ |
| 8643 | case 'g': /* coprocessor destination register */ |
| 8644 | s_reset = s; |
| 8645 | if (s[0] == '$') |
| 8646 | { |
| 8647 | if (ISDIGIT (s[1])) |
| 8648 | { |
| 8649 | ++s; |
| 8650 | regno = 0; |
| 8651 | do |
| 8652 | { |
| 8653 | regno *= 10; |
| 8654 | regno += *s - '0'; |
| 8655 | ++s; |
| 8656 | } |
| 8657 | while (ISDIGIT (*s)); |
| 8658 | if (regno > 31) |
| 8659 | as_bad (_("Invalid register number (%d)"), regno); |
| 8660 | } |
| 8661 | else if (*args == 'E' || *args == 'G' || *args == 'K') |
| 8662 | goto notreg; |
| 8663 | else |
| 8664 | { |
| 8665 | if (s[1] == 'r' && s[2] == 'a') |
| 8666 | { |
| 8667 | s += 3; |
| 8668 | regno = RA; |
| 8669 | } |
| 8670 | else if (s[1] == 'f' && s[2] == 'p') |
| 8671 | { |
| 8672 | s += 3; |
| 8673 | regno = FP; |
| 8674 | } |
| 8675 | else if (s[1] == 's' && s[2] == 'p') |
| 8676 | { |
| 8677 | s += 3; |
| 8678 | regno = SP; |
| 8679 | } |
| 8680 | else if (s[1] == 'g' && s[2] == 'p') |
| 8681 | { |
| 8682 | s += 3; |
| 8683 | regno = GP; |
| 8684 | } |
| 8685 | else if (s[1] == 'a' && s[2] == 't') |
| 8686 | { |
| 8687 | s += 3; |
| 8688 | regno = AT; |
| 8689 | } |
| 8690 | else if (s[1] == 'k' && s[2] == 't' && s[3] == '0') |
| 8691 | { |
| 8692 | s += 4; |
| 8693 | regno = KT0; |
| 8694 | } |
| 8695 | else if (s[1] == 'k' && s[2] == 't' && s[3] == '1') |
| 8696 | { |
| 8697 | s += 4; |
| 8698 | regno = KT1; |
| 8699 | } |
| 8700 | else if (s[1] == 'z' && s[2] == 'e' && s[3] == 'r' && s[4] == 'o') |
| 8701 | { |
| 8702 | s += 5; |
| 8703 | regno = ZERO; |
| 8704 | } |
| 8705 | else if (itbl_have_entries) |
| 8706 | { |
| 8707 | char *p, *n; |
| 8708 | unsigned long r; |
| 8709 | |
| 8710 | p = s + 1; /* advance past '$' */ |
| 8711 | n = itbl_get_field (&p); /* n is name */ |
| 8712 | |
| 8713 | /* See if this is a register defined in an |
| 8714 | itbl entry. */ |
| 8715 | if (itbl_get_reg_val (n, &r)) |
| 8716 | { |
| 8717 | /* Get_field advances to the start of |
| 8718 | the next field, so we need to back |
| 8719 | rack to the end of the last field. */ |
| 8720 | if (p) |
| 8721 | s = p - 1; |
| 8722 | else |
| 8723 | s = strchr (s, '\0'); |
| 8724 | regno = r; |
| 8725 | } |
| 8726 | else |
| 8727 | goto notreg; |
| 8728 | } |
| 8729 | else |
| 8730 | goto notreg; |
| 8731 | } |
| 8732 | if (regno == AT |
| 8733 | && ! mips_opts.noat |
| 8734 | && *args != 'E' |
| 8735 | && *args != 'G' |
| 8736 | && *args != 'K') |
| 8737 | as_warn (_("Used $at without \".set noat\"")); |
| 8738 | c = *args; |
| 8739 | if (*s == ' ') |
| 8740 | ++s; |
| 8741 | if (args[1] != *s) |
| 8742 | { |
| 8743 | if (c == 'r' || c == 'v' || c == 'w') |
| 8744 | { |
| 8745 | regno = lastregno; |
| 8746 | s = s_reset; |
| 8747 | ++args; |
| 8748 | } |
| 8749 | } |
| 8750 | /* 'z' only matches $0. */ |
| 8751 | if (c == 'z' && regno != 0) |
| 8752 | break; |
| 8753 | |
| 8754 | /* Now that we have assembled one operand, we use the args string |
| 8755 | * to figure out where it goes in the instruction. */ |
| 8756 | switch (c) |
| 8757 | { |
| 8758 | case 'r': |
| 8759 | case 's': |
| 8760 | case 'v': |
| 8761 | case 'b': |
| 8762 | INSERT_OPERAND (RS, *ip, regno); |
| 8763 | break; |
| 8764 | case 'd': |
| 8765 | case 'G': |
| 8766 | case 'K': |
| 8767 | case 'g': |
| 8768 | INSERT_OPERAND (RD, *ip, regno); |
| 8769 | break; |
| 8770 | case 'U': |
| 8771 | INSERT_OPERAND (RD, *ip, regno); |
| 8772 | INSERT_OPERAND (RT, *ip, regno); |
| 8773 | break; |
| 8774 | case 'w': |
| 8775 | case 't': |
| 8776 | case 'E': |
| 8777 | INSERT_OPERAND (RT, *ip, regno); |
| 8778 | break; |
| 8779 | case 'x': |
| 8780 | /* This case exists because on the r3000 trunc |
| 8781 | expands into a macro which requires a gp |
| 8782 | register. On the r6000 or r4000 it is |
| 8783 | assembled into a single instruction which |
| 8784 | ignores the register. Thus the insn version |
| 8785 | is MIPS_ISA2 and uses 'x', and the macro |
| 8786 | version is MIPS_ISA1 and uses 't'. */ |
| 8787 | break; |
| 8788 | case 'z': |
| 8789 | /* This case is for the div instruction, which |
| 8790 | acts differently if the destination argument |
| 8791 | is $0. This only matches $0, and is checked |
| 8792 | outside the switch. */ |
| 8793 | break; |
| 8794 | case 'D': |
| 8795 | /* Itbl operand; not yet implemented. FIXME ?? */ |
| 8796 | break; |
| 8797 | /* What about all other operands like 'i', which |
| 8798 | can be specified in the opcode table? */ |
| 8799 | } |
| 8800 | lastregno = regno; |
| 8801 | continue; |
| 8802 | } |
| 8803 | notreg: |
| 8804 | switch (*args++) |
| 8805 | { |
| 8806 | case 'r': |
| 8807 | case 'v': |
| 8808 | INSERT_OPERAND (RS, *ip, lastregno); |
| 8809 | continue; |
| 8810 | case 'w': |
| 8811 | INSERT_OPERAND (RT, *ip, lastregno); |
| 8812 | continue; |
| 8813 | } |
| 8814 | break; |
| 8815 | |
| 8816 | case 'O': /* MDMX alignment immediate constant. */ |
| 8817 | my_getExpression (&imm_expr, s); |
| 8818 | check_absolute_expr (ip, &imm_expr); |
| 8819 | if ((unsigned long) imm_expr.X_add_number > OP_MASK_ALN) |
| 8820 | as_warn ("Improper align amount (%ld), using low bits", |
| 8821 | (long) imm_expr.X_add_number); |
| 8822 | INSERT_OPERAND (ALN, *ip, imm_expr.X_add_number); |
| 8823 | imm_expr.X_op = O_absent; |
| 8824 | s = expr_end; |
| 8825 | continue; |
| 8826 | |
| 8827 | case 'Q': /* MDMX vector, element sel, or const. */ |
| 8828 | if (s[0] != '$') |
| 8829 | { |
| 8830 | /* MDMX Immediate. */ |
| 8831 | my_getExpression (&imm_expr, s); |
| 8832 | check_absolute_expr (ip, &imm_expr); |
| 8833 | if ((unsigned long) imm_expr.X_add_number > OP_MASK_FT) |
| 8834 | as_warn (_("Invalid MDMX Immediate (%ld)"), |
| 8835 | (long) imm_expr.X_add_number); |
| 8836 | INSERT_OPERAND (FT, *ip, imm_expr.X_add_number); |
| 8837 | if (ip->insn_opcode & (OP_MASK_VSEL << OP_SH_VSEL)) |
| 8838 | ip->insn_opcode |= MDMX_FMTSEL_IMM_QH << OP_SH_VSEL; |
| 8839 | else |
| 8840 | ip->insn_opcode |= MDMX_FMTSEL_IMM_OB << OP_SH_VSEL; |
| 8841 | imm_expr.X_op = O_absent; |
| 8842 | s = expr_end; |
| 8843 | continue; |
| 8844 | } |
| 8845 | /* Not MDMX Immediate. Fall through. */ |
| 8846 | case 'X': /* MDMX destination register. */ |
| 8847 | case 'Y': /* MDMX source register. */ |
| 8848 | case 'Z': /* MDMX target register. */ |
| 8849 | is_mdmx = 1; |
| 8850 | case 'D': /* floating point destination register */ |
| 8851 | case 'S': /* floating point source register */ |
| 8852 | case 'T': /* floating point target register */ |
| 8853 | case 'R': /* floating point source register */ |
| 8854 | case 'V': |
| 8855 | case 'W': |
| 8856 | s_reset = s; |
| 8857 | /* Accept $fN for FP and MDMX register numbers, and in |
| 8858 | addition accept $vN for MDMX register numbers. */ |
| 8859 | if ((s[0] == '$' && s[1] == 'f' && ISDIGIT (s[2])) |
| 8860 | || (is_mdmx != 0 && s[0] == '$' && s[1] == 'v' |
| 8861 | && ISDIGIT (s[2]))) |
| 8862 | { |
| 8863 | s += 2; |
| 8864 | regno = 0; |
| 8865 | do |
| 8866 | { |
| 8867 | regno *= 10; |
| 8868 | regno += *s - '0'; |
| 8869 | ++s; |
| 8870 | } |
| 8871 | while (ISDIGIT (*s)); |
| 8872 | |
| 8873 | if (regno > 31) |
| 8874 | as_bad (_("Invalid float register number (%d)"), regno); |
| 8875 | |
| 8876 | if ((regno & 1) != 0 |
| 8877 | && HAVE_32BIT_FPRS |
| 8878 | && ! (strcmp (str, "mtc1") == 0 |
| 8879 | || strcmp (str, "mfc1") == 0 |
| 8880 | || strcmp (str, "lwc1") == 0 |
| 8881 | || strcmp (str, "swc1") == 0 |
| 8882 | || strcmp (str, "l.s") == 0 |
| 8883 | || strcmp (str, "s.s") == 0 |
| 8884 | || strcmp (str, "mftc1") == 0 |
| 8885 | || strcmp (str, "mfthc1") == 0 |
| 8886 | || strcmp (str, "cftc1") == 0 |
| 8887 | || strcmp (str, "mttc1") == 0 |
| 8888 | || strcmp (str, "mtthc1") == 0 |
| 8889 | || strcmp (str, "cttc1") == 0)) |
| 8890 | as_warn (_("Float register should be even, was %d"), |
| 8891 | regno); |
| 8892 | |
| 8893 | c = *args; |
| 8894 | if (*s == ' ') |
| 8895 | ++s; |
| 8896 | if (args[1] != *s) |
| 8897 | { |
| 8898 | if (c == 'V' || c == 'W') |
| 8899 | { |
| 8900 | regno = lastregno; |
| 8901 | s = s_reset; |
| 8902 | ++args; |
| 8903 | } |
| 8904 | } |
| 8905 | switch (c) |
| 8906 | { |
| 8907 | case 'D': |
| 8908 | case 'X': |
| 8909 | INSERT_OPERAND (FD, *ip, regno); |
| 8910 | break; |
| 8911 | case 'V': |
| 8912 | case 'S': |
| 8913 | case 'Y': |
| 8914 | INSERT_OPERAND (FS, *ip, regno); |
| 8915 | break; |
| 8916 | case 'Q': |
| 8917 | /* This is like 'Z', but also needs to fix the MDMX |
| 8918 | vector/scalar select bits. Note that the |
| 8919 | scalar immediate case is handled above. */ |
| 8920 | if (*s == '[') |
| 8921 | { |
| 8922 | int is_qh = (ip->insn_opcode & (1 << OP_SH_VSEL)); |
| 8923 | int max_el = (is_qh ? 3 : 7); |
| 8924 | s++; |
| 8925 | my_getExpression(&imm_expr, s); |
| 8926 | check_absolute_expr (ip, &imm_expr); |
| 8927 | s = expr_end; |
| 8928 | if (imm_expr.X_add_number > max_el) |
| 8929 | as_bad(_("Bad element selector %ld"), |
| 8930 | (long) imm_expr.X_add_number); |
| 8931 | imm_expr.X_add_number &= max_el; |
| 8932 | ip->insn_opcode |= (imm_expr.X_add_number |
| 8933 | << (OP_SH_VSEL + |
| 8934 | (is_qh ? 2 : 1))); |
| 8935 | imm_expr.X_op = O_absent; |
| 8936 | if (*s != ']') |
| 8937 | as_warn(_("Expecting ']' found '%s'"), s); |
| 8938 | else |
| 8939 | s++; |
| 8940 | } |
| 8941 | else |
| 8942 | { |
| 8943 | if (ip->insn_opcode & (OP_MASK_VSEL << OP_SH_VSEL)) |
| 8944 | ip->insn_opcode |= (MDMX_FMTSEL_VEC_QH |
| 8945 | << OP_SH_VSEL); |
| 8946 | else |
| 8947 | ip->insn_opcode |= (MDMX_FMTSEL_VEC_OB << |
| 8948 | OP_SH_VSEL); |
| 8949 | } |
| 8950 | /* Fall through */ |
| 8951 | case 'W': |
| 8952 | case 'T': |
| 8953 | case 'Z': |
| 8954 | INSERT_OPERAND (FT, *ip, regno); |
| 8955 | break; |
| 8956 | case 'R': |
| 8957 | INSERT_OPERAND (FR, *ip, regno); |
| 8958 | break; |
| 8959 | } |
| 8960 | lastregno = regno; |
| 8961 | continue; |
| 8962 | } |
| 8963 | |
| 8964 | switch (*args++) |
| 8965 | { |
| 8966 | case 'V': |
| 8967 | INSERT_OPERAND (FS, *ip, lastregno); |
| 8968 | continue; |
| 8969 | case 'W': |
| 8970 | INSERT_OPERAND (FT, *ip, lastregno); |
| 8971 | continue; |
| 8972 | } |
| 8973 | break; |
| 8974 | |
| 8975 | case 'I': |
| 8976 | my_getExpression (&imm_expr, s); |
| 8977 | if (imm_expr.X_op != O_big |
| 8978 | && imm_expr.X_op != O_constant) |
| 8979 | insn_error = _("absolute expression required"); |
| 8980 | if (HAVE_32BIT_GPRS) |
| 8981 | normalize_constant_expr (&imm_expr); |
| 8982 | s = expr_end; |
| 8983 | continue; |
| 8984 | |
| 8985 | case 'A': |
| 8986 | my_getExpression (&offset_expr, s); |
| 8987 | normalize_address_expr (&offset_expr); |
| 8988 | *imm_reloc = BFD_RELOC_32; |
| 8989 | s = expr_end; |
| 8990 | continue; |
| 8991 | |
| 8992 | case 'F': |
| 8993 | case 'L': |
| 8994 | case 'f': |
| 8995 | case 'l': |
| 8996 | { |
| 8997 | int f64; |
| 8998 | int using_gprs; |
| 8999 | char *save_in; |
| 9000 | char *err; |
| 9001 | unsigned char temp[8]; |
| 9002 | int len; |
| 9003 | unsigned int length; |
| 9004 | segT seg; |
| 9005 | subsegT subseg; |
| 9006 | char *p; |
| 9007 | |
| 9008 | /* These only appear as the last operand in an |
| 9009 | instruction, and every instruction that accepts |
| 9010 | them in any variant accepts them in all variants. |
| 9011 | This means we don't have to worry about backing out |
| 9012 | any changes if the instruction does not match. |
| 9013 | |
| 9014 | The difference between them is the size of the |
| 9015 | floating point constant and where it goes. For 'F' |
| 9016 | and 'L' the constant is 64 bits; for 'f' and 'l' it |
| 9017 | is 32 bits. Where the constant is placed is based |
| 9018 | on how the MIPS assembler does things: |
| 9019 | F -- .rdata |
| 9020 | L -- .lit8 |
| 9021 | f -- immediate value |
| 9022 | l -- .lit4 |
| 9023 | |
| 9024 | The .lit4 and .lit8 sections are only used if |
| 9025 | permitted by the -G argument. |
| 9026 | |
| 9027 | The code below needs to know whether the target register |
| 9028 | is 32 or 64 bits wide. It relies on the fact 'f' and |
| 9029 | 'F' are used with GPR-based instructions and 'l' and |
| 9030 | 'L' are used with FPR-based instructions. */ |
| 9031 | |
| 9032 | f64 = *args == 'F' || *args == 'L'; |
| 9033 | using_gprs = *args == 'F' || *args == 'f'; |
| 9034 | |
| 9035 | save_in = input_line_pointer; |
| 9036 | input_line_pointer = s; |
| 9037 | err = md_atof (f64 ? 'd' : 'f', (char *) temp, &len); |
| 9038 | length = len; |
| 9039 | s = input_line_pointer; |
| 9040 | input_line_pointer = save_in; |
| 9041 | if (err != NULL && *err != '\0') |
| 9042 | { |
| 9043 | as_bad (_("Bad floating point constant: %s"), err); |
| 9044 | memset (temp, '\0', sizeof temp); |
| 9045 | length = f64 ? 8 : 4; |
| 9046 | } |
| 9047 | |
| 9048 | assert (length == (unsigned) (f64 ? 8 : 4)); |
| 9049 | |
| 9050 | if (*args == 'f' |
| 9051 | || (*args == 'l' |
| 9052 | && (g_switch_value < 4 |
| 9053 | || (temp[0] == 0 && temp[1] == 0) |
| 9054 | || (temp[2] == 0 && temp[3] == 0)))) |
| 9055 | { |
| 9056 | imm_expr.X_op = O_constant; |
| 9057 | if (! target_big_endian) |
| 9058 | imm_expr.X_add_number = bfd_getl32 (temp); |
| 9059 | else |
| 9060 | imm_expr.X_add_number = bfd_getb32 (temp); |
| 9061 | } |
| 9062 | else if (length > 4 |
| 9063 | && ! mips_disable_float_construction |
| 9064 | /* Constants can only be constructed in GPRs and |
| 9065 | copied to FPRs if the GPRs are at least as wide |
| 9066 | as the FPRs. Force the constant into memory if |
| 9067 | we are using 64-bit FPRs but the GPRs are only |
| 9068 | 32 bits wide. */ |
| 9069 | && (using_gprs |
| 9070 | || ! (HAVE_64BIT_FPRS && HAVE_32BIT_GPRS)) |
| 9071 | && ((temp[0] == 0 && temp[1] == 0) |
| 9072 | || (temp[2] == 0 && temp[3] == 0)) |
| 9073 | && ((temp[4] == 0 && temp[5] == 0) |
| 9074 | || (temp[6] == 0 && temp[7] == 0))) |
| 9075 | { |
| 9076 | /* The value is simple enough to load with a couple of |
| 9077 | instructions. If using 32-bit registers, set |
| 9078 | imm_expr to the high order 32 bits and offset_expr to |
| 9079 | the low order 32 bits. Otherwise, set imm_expr to |
| 9080 | the entire 64 bit constant. */ |
| 9081 | if (using_gprs ? HAVE_32BIT_GPRS : HAVE_32BIT_FPRS) |
| 9082 | { |
| 9083 | imm_expr.X_op = O_constant; |
| 9084 | offset_expr.X_op = O_constant; |
| 9085 | if (! target_big_endian) |
| 9086 | { |
| 9087 | imm_expr.X_add_number = bfd_getl32 (temp + 4); |
| 9088 | offset_expr.X_add_number = bfd_getl32 (temp); |
| 9089 | } |
| 9090 | else |
| 9091 | { |
| 9092 | imm_expr.X_add_number = bfd_getb32 (temp); |
| 9093 | offset_expr.X_add_number = bfd_getb32 (temp + 4); |
| 9094 | } |
| 9095 | if (offset_expr.X_add_number == 0) |
| 9096 | offset_expr.X_op = O_absent; |
| 9097 | } |
| 9098 | else if (sizeof (imm_expr.X_add_number) > 4) |
| 9099 | { |
| 9100 | imm_expr.X_op = O_constant; |
| 9101 | if (! target_big_endian) |
| 9102 | imm_expr.X_add_number = bfd_getl64 (temp); |
| 9103 | else |
| 9104 | imm_expr.X_add_number = bfd_getb64 (temp); |
| 9105 | } |
| 9106 | else |
| 9107 | { |
| 9108 | imm_expr.X_op = O_big; |
| 9109 | imm_expr.X_add_number = 4; |
| 9110 | if (! target_big_endian) |
| 9111 | { |
| 9112 | generic_bignum[0] = bfd_getl16 (temp); |
| 9113 | generic_bignum[1] = bfd_getl16 (temp + 2); |
| 9114 | generic_bignum[2] = bfd_getl16 (temp + 4); |
| 9115 | generic_bignum[3] = bfd_getl16 (temp + 6); |
| 9116 | } |
| 9117 | else |
| 9118 | { |
| 9119 | generic_bignum[0] = bfd_getb16 (temp + 6); |
| 9120 | generic_bignum[1] = bfd_getb16 (temp + 4); |
| 9121 | generic_bignum[2] = bfd_getb16 (temp + 2); |
| 9122 | generic_bignum[3] = bfd_getb16 (temp); |
| 9123 | } |
| 9124 | } |
| 9125 | } |
| 9126 | else |
| 9127 | { |
| 9128 | const char *newname; |
| 9129 | segT new_seg; |
| 9130 | |
| 9131 | /* Switch to the right section. */ |
| 9132 | seg = now_seg; |
| 9133 | subseg = now_subseg; |
| 9134 | switch (*args) |
| 9135 | { |
| 9136 | default: /* unused default case avoids warnings. */ |
| 9137 | case 'L': |
| 9138 | newname = RDATA_SECTION_NAME; |
| 9139 | if (g_switch_value >= 8) |
| 9140 | newname = ".lit8"; |
| 9141 | break; |
| 9142 | case 'F': |
| 9143 | newname = RDATA_SECTION_NAME; |
| 9144 | break; |
| 9145 | case 'l': |
| 9146 | assert (g_switch_value >= 4); |
| 9147 | newname = ".lit4"; |
| 9148 | break; |
| 9149 | } |
| 9150 | new_seg = subseg_new (newname, (subsegT) 0); |
| 9151 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour) |
| 9152 | bfd_set_section_flags (stdoutput, new_seg, |
| 9153 | (SEC_ALLOC |
| 9154 | | SEC_LOAD |
| 9155 | | SEC_READONLY |
| 9156 | | SEC_DATA)); |
| 9157 | frag_align (*args == 'l' ? 2 : 3, 0, 0); |
| 9158 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour |
| 9159 | && strcmp (TARGET_OS, "elf") != 0) |
| 9160 | record_alignment (new_seg, 4); |
| 9161 | else |
| 9162 | record_alignment (new_seg, *args == 'l' ? 2 : 3); |
| 9163 | if (seg == now_seg) |
| 9164 | as_bad (_("Can't use floating point insn in this section")); |
| 9165 | |
| 9166 | /* Set the argument to the current address in the |
| 9167 | section. */ |
| 9168 | offset_expr.X_op = O_symbol; |
| 9169 | offset_expr.X_add_symbol = |
| 9170 | symbol_new ("L0\001", now_seg, |
| 9171 | (valueT) frag_now_fix (), frag_now); |
| 9172 | offset_expr.X_add_number = 0; |
| 9173 | |
| 9174 | /* Put the floating point number into the section. */ |
| 9175 | p = frag_more ((int) length); |
| 9176 | memcpy (p, temp, length); |
| 9177 | |
| 9178 | /* Switch back to the original section. */ |
| 9179 | subseg_set (seg, subseg); |
| 9180 | } |
| 9181 | } |
| 9182 | continue; |
| 9183 | |
| 9184 | case 'i': /* 16 bit unsigned immediate */ |
| 9185 | case 'j': /* 16 bit signed immediate */ |
| 9186 | *imm_reloc = BFD_RELOC_LO16; |
| 9187 | if (my_getSmallExpression (&imm_expr, imm_reloc, s) == 0) |
| 9188 | { |
| 9189 | int more; |
| 9190 | offsetT minval, maxval; |
| 9191 | |
| 9192 | more = (insn + 1 < &mips_opcodes[NUMOPCODES] |
| 9193 | && strcmp (insn->name, insn[1].name) == 0); |
| 9194 | |
| 9195 | /* If the expression was written as an unsigned number, |
| 9196 | only treat it as signed if there are no more |
| 9197 | alternatives. */ |
| 9198 | if (more |
| 9199 | && *args == 'j' |
| 9200 | && sizeof (imm_expr.X_add_number) <= 4 |
| 9201 | && imm_expr.X_op == O_constant |
| 9202 | && imm_expr.X_add_number < 0 |
| 9203 | && imm_expr.X_unsigned |
| 9204 | && HAVE_64BIT_GPRS) |
| 9205 | break; |
| 9206 | |
| 9207 | /* For compatibility with older assemblers, we accept |
| 9208 | 0x8000-0xffff as signed 16-bit numbers when only |
| 9209 | signed numbers are allowed. */ |
| 9210 | if (*args == 'i') |
| 9211 | minval = 0, maxval = 0xffff; |
| 9212 | else if (more) |
| 9213 | minval = -0x8000, maxval = 0x7fff; |
| 9214 | else |
| 9215 | minval = -0x8000, maxval = 0xffff; |
| 9216 | |
| 9217 | if (imm_expr.X_op != O_constant |
| 9218 | || imm_expr.X_add_number < minval |
| 9219 | || imm_expr.X_add_number > maxval) |
| 9220 | { |
| 9221 | if (more) |
| 9222 | break; |
| 9223 | if (imm_expr.X_op == O_constant |
| 9224 | || imm_expr.X_op == O_big) |
| 9225 | as_bad (_("expression out of range")); |
| 9226 | } |
| 9227 | } |
| 9228 | s = expr_end; |
| 9229 | continue; |
| 9230 | |
| 9231 | case 'o': /* 16 bit offset */ |
| 9232 | /* Check whether there is only a single bracketed expression |
| 9233 | left. If so, it must be the base register and the |
| 9234 | constant must be zero. */ |
| 9235 | if (*s == '(' && strchr (s + 1, '(') == 0) |
| 9236 | { |
| 9237 | offset_expr.X_op = O_constant; |
| 9238 | offset_expr.X_add_number = 0; |
| 9239 | continue; |
| 9240 | } |
| 9241 | |
| 9242 | /* If this value won't fit into a 16 bit offset, then go |
| 9243 | find a macro that will generate the 32 bit offset |
| 9244 | code pattern. */ |
| 9245 | if (my_getSmallExpression (&offset_expr, offset_reloc, s) == 0 |
| 9246 | && (offset_expr.X_op != O_constant |
| 9247 | || offset_expr.X_add_number >= 0x8000 |
| 9248 | || offset_expr.X_add_number < -0x8000)) |
| 9249 | break; |
| 9250 | |
| 9251 | s = expr_end; |
| 9252 | continue; |
| 9253 | |
| 9254 | case 'p': /* pc relative offset */ |
| 9255 | *offset_reloc = BFD_RELOC_16_PCREL_S2; |
| 9256 | my_getExpression (&offset_expr, s); |
| 9257 | s = expr_end; |
| 9258 | continue; |
| 9259 | |
| 9260 | case 'u': /* upper 16 bits */ |
| 9261 | if (my_getSmallExpression (&imm_expr, imm_reloc, s) == 0 |
| 9262 | && imm_expr.X_op == O_constant |
| 9263 | && (imm_expr.X_add_number < 0 |
| 9264 | || imm_expr.X_add_number >= 0x10000)) |
| 9265 | as_bad (_("lui expression not in range 0..65535")); |
| 9266 | s = expr_end; |
| 9267 | continue; |
| 9268 | |
| 9269 | case 'a': /* 26 bit address */ |
| 9270 | my_getExpression (&offset_expr, s); |
| 9271 | s = expr_end; |
| 9272 | *offset_reloc = BFD_RELOC_MIPS_JMP; |
| 9273 | continue; |
| 9274 | |
| 9275 | case 'N': /* 3 bit branch condition code */ |
| 9276 | case 'M': /* 3 bit compare condition code */ |
| 9277 | if (strncmp (s, "$fcc", 4) != 0) |
| 9278 | break; |
| 9279 | s += 4; |
| 9280 | regno = 0; |
| 9281 | do |
| 9282 | { |
| 9283 | regno *= 10; |
| 9284 | regno += *s - '0'; |
| 9285 | ++s; |
| 9286 | } |
| 9287 | while (ISDIGIT (*s)); |
| 9288 | if (regno > 7) |
| 9289 | as_bad (_("Invalid condition code register $fcc%d"), regno); |
| 9290 | if ((strcmp(str + strlen(str) - 3, ".ps") == 0 |
| 9291 | || strcmp(str + strlen(str) - 5, "any2f") == 0 |
| 9292 | || strcmp(str + strlen(str) - 5, "any2t") == 0) |
| 9293 | && (regno & 1) != 0) |
| 9294 | as_warn(_("Condition code register should be even for %s, was %d"), |
| 9295 | str, regno); |
| 9296 | if ((strcmp(str + strlen(str) - 5, "any4f") == 0 |
| 9297 | || strcmp(str + strlen(str) - 5, "any4t") == 0) |
| 9298 | && (regno & 3) != 0) |
| 9299 | as_warn(_("Condition code register should be 0 or 4 for %s, was %d"), |
| 9300 | str, regno); |
| 9301 | if (*args == 'N') |
| 9302 | INSERT_OPERAND (BCC, *ip, regno); |
| 9303 | else |
| 9304 | INSERT_OPERAND (CCC, *ip, regno); |
| 9305 | continue; |
| 9306 | |
| 9307 | case 'H': |
| 9308 | if (s[0] == '0' && (s[1] == 'x' || s[1] == 'X')) |
| 9309 | s += 2; |
| 9310 | if (ISDIGIT (*s)) |
| 9311 | { |
| 9312 | c = 0; |
| 9313 | do |
| 9314 | { |
| 9315 | c *= 10; |
| 9316 | c += *s - '0'; |
| 9317 | ++s; |
| 9318 | } |
| 9319 | while (ISDIGIT (*s)); |
| 9320 | } |
| 9321 | else |
| 9322 | c = 8; /* Invalid sel value. */ |
| 9323 | |
| 9324 | if (c > 7) |
| 9325 | as_bad (_("invalid coprocessor sub-selection value (0-7)")); |
| 9326 | ip->insn_opcode |= c; |
| 9327 | continue; |
| 9328 | |
| 9329 | case 'e': |
| 9330 | /* Must be at least one digit. */ |
| 9331 | my_getExpression (&imm_expr, s); |
| 9332 | check_absolute_expr (ip, &imm_expr); |
| 9333 | |
| 9334 | if ((unsigned long) imm_expr.X_add_number |
| 9335 | > (unsigned long) OP_MASK_VECBYTE) |
| 9336 | { |
| 9337 | as_bad (_("bad byte vector index (%ld)"), |
| 9338 | (long) imm_expr.X_add_number); |
| 9339 | imm_expr.X_add_number = 0; |
| 9340 | } |
| 9341 | |
| 9342 | INSERT_OPERAND (VECBYTE, *ip, imm_expr.X_add_number); |
| 9343 | imm_expr.X_op = O_absent; |
| 9344 | s = expr_end; |
| 9345 | continue; |
| 9346 | |
| 9347 | case '%': |
| 9348 | my_getExpression (&imm_expr, s); |
| 9349 | check_absolute_expr (ip, &imm_expr); |
| 9350 | |
| 9351 | if ((unsigned long) imm_expr.X_add_number |
| 9352 | > (unsigned long) OP_MASK_VECALIGN) |
| 9353 | { |
| 9354 | as_bad (_("bad byte vector index (%ld)"), |
| 9355 | (long) imm_expr.X_add_number); |
| 9356 | imm_expr.X_add_number = 0; |
| 9357 | } |
| 9358 | |
| 9359 | INSERT_OPERAND (VECALIGN, *ip, imm_expr.X_add_number); |
| 9360 | imm_expr.X_op = O_absent; |
| 9361 | s = expr_end; |
| 9362 | continue; |
| 9363 | |
| 9364 | default: |
| 9365 | as_bad (_("bad char = '%c'\n"), *args); |
| 9366 | internalError (); |
| 9367 | } |
| 9368 | break; |
| 9369 | } |
| 9370 | /* Args don't match. */ |
| 9371 | if (insn + 1 < &mips_opcodes[NUMOPCODES] && |
| 9372 | !strcmp (insn->name, insn[1].name)) |
| 9373 | { |
| 9374 | ++insn; |
| 9375 | s = argsStart; |
| 9376 | insn_error = _("illegal operands"); |
| 9377 | continue; |
| 9378 | } |
| 9379 | if (save_c) |
| 9380 | *(--s) = save_c; |
| 9381 | insn_error = _("illegal operands"); |
| 9382 | return; |
| 9383 | } |
| 9384 | } |
| 9385 | |
| 9386 | #define SKIP_SPACE_TABS(S) { while (*(S) == ' ' || *(S) == '\t') ++(S); } |
| 9387 | |
| 9388 | /* This routine assembles an instruction into its binary format when |
| 9389 | assembling for the mips16. As a side effect, it sets one of the |
| 9390 | global variables imm_reloc or offset_reloc to the type of |
| 9391 | relocation to do if one of the operands is an address expression. |
| 9392 | It also sets mips16_small and mips16_ext if the user explicitly |
| 9393 | requested a small or extended instruction. */ |
| 9394 | |
| 9395 | static void |
| 9396 | mips16_ip (char *str, struct mips_cl_insn *ip) |
| 9397 | { |
| 9398 | char *s; |
| 9399 | const char *args; |
| 9400 | struct mips_opcode *insn; |
| 9401 | char *argsstart; |
| 9402 | unsigned int regno; |
| 9403 | unsigned int lastregno = 0; |
| 9404 | char *s_reset; |
| 9405 | size_t i; |
| 9406 | |
| 9407 | insn_error = NULL; |
| 9408 | |
| 9409 | mips16_small = FALSE; |
| 9410 | mips16_ext = FALSE; |
| 9411 | |
| 9412 | for (s = str; ISLOWER (*s); ++s) |
| 9413 | ; |
| 9414 | switch (*s) |
| 9415 | { |
| 9416 | case '\0': |
| 9417 | break; |
| 9418 | |
| 9419 | case ' ': |
| 9420 | *s++ = '\0'; |
| 9421 | break; |
| 9422 | |
| 9423 | case '.': |
| 9424 | if (s[1] == 't' && s[2] == ' ') |
| 9425 | { |
| 9426 | *s = '\0'; |
| 9427 | mips16_small = TRUE; |
| 9428 | s += 3; |
| 9429 | break; |
| 9430 | } |
| 9431 | else if (s[1] == 'e' && s[2] == ' ') |
| 9432 | { |
| 9433 | *s = '\0'; |
| 9434 | mips16_ext = TRUE; |
| 9435 | s += 3; |
| 9436 | break; |
| 9437 | } |
| 9438 | /* Fall through. */ |
| 9439 | default: |
| 9440 | insn_error = _("unknown opcode"); |
| 9441 | return; |
| 9442 | } |
| 9443 | |
| 9444 | if (mips_opts.noautoextend && ! mips16_ext) |
| 9445 | mips16_small = TRUE; |
| 9446 | |
| 9447 | if ((insn = (struct mips_opcode *) hash_find (mips16_op_hash, str)) == NULL) |
| 9448 | { |
| 9449 | insn_error = _("unrecognized opcode"); |
| 9450 | return; |
| 9451 | } |
| 9452 | |
| 9453 | argsstart = s; |
| 9454 | for (;;) |
| 9455 | { |
| 9456 | assert (strcmp (insn->name, str) == 0); |
| 9457 | |
| 9458 | create_insn (ip, insn); |
| 9459 | imm_expr.X_op = O_absent; |
| 9460 | imm_reloc[0] = BFD_RELOC_UNUSED; |
| 9461 | imm_reloc[1] = BFD_RELOC_UNUSED; |
| 9462 | imm_reloc[2] = BFD_RELOC_UNUSED; |
| 9463 | imm2_expr.X_op = O_absent; |
| 9464 | offset_expr.X_op = O_absent; |
| 9465 | offset_reloc[0] = BFD_RELOC_UNUSED; |
| 9466 | offset_reloc[1] = BFD_RELOC_UNUSED; |
| 9467 | offset_reloc[2] = BFD_RELOC_UNUSED; |
| 9468 | for (args = insn->args; 1; ++args) |
| 9469 | { |
| 9470 | int c; |
| 9471 | |
| 9472 | if (*s == ' ') |
| 9473 | ++s; |
| 9474 | |
| 9475 | /* In this switch statement we call break if we did not find |
| 9476 | a match, continue if we did find a match, or return if we |
| 9477 | are done. */ |
| 9478 | |
| 9479 | c = *args; |
| 9480 | switch (c) |
| 9481 | { |
| 9482 | case '\0': |
| 9483 | if (*s == '\0') |
| 9484 | { |
| 9485 | /* Stuff the immediate value in now, if we can. */ |
| 9486 | if (imm_expr.X_op == O_constant |
| 9487 | && *imm_reloc > BFD_RELOC_UNUSED |
| 9488 | && insn->pinfo != INSN_MACRO) |
| 9489 | { |
| 9490 | valueT tmp; |
| 9491 | |
| 9492 | switch (*offset_reloc) |
| 9493 | { |
| 9494 | case BFD_RELOC_MIPS16_HI16_S: |
| 9495 | tmp = (imm_expr.X_add_number + 0x8000) >> 16; |
| 9496 | break; |
| 9497 | |
| 9498 | case BFD_RELOC_MIPS16_HI16: |
| 9499 | tmp = imm_expr.X_add_number >> 16; |
| 9500 | break; |
| 9501 | |
| 9502 | case BFD_RELOC_MIPS16_LO16: |
| 9503 | tmp = ((imm_expr.X_add_number + 0x8000) & 0xffff) |
| 9504 | - 0x8000; |
| 9505 | break; |
| 9506 | |
| 9507 | case BFD_RELOC_UNUSED: |
| 9508 | tmp = imm_expr.X_add_number; |
| 9509 | break; |
| 9510 | |
| 9511 | default: |
| 9512 | internalError (); |
| 9513 | } |
| 9514 | *offset_reloc = BFD_RELOC_UNUSED; |
| 9515 | |
| 9516 | mips16_immed (NULL, 0, *imm_reloc - BFD_RELOC_UNUSED, |
| 9517 | tmp, TRUE, mips16_small, |
| 9518 | mips16_ext, &ip->insn_opcode, |
| 9519 | &ip->use_extend, &ip->extend); |
| 9520 | imm_expr.X_op = O_absent; |
| 9521 | *imm_reloc = BFD_RELOC_UNUSED; |
| 9522 | } |
| 9523 | |
| 9524 | return; |
| 9525 | } |
| 9526 | break; |
| 9527 | |
| 9528 | case ',': |
| 9529 | if (*s++ == c) |
| 9530 | continue; |
| 9531 | s--; |
| 9532 | switch (*++args) |
| 9533 | { |
| 9534 | case 'v': |
| 9535 | MIPS16_INSERT_OPERAND (RX, *ip, lastregno); |
| 9536 | continue; |
| 9537 | case 'w': |
| 9538 | MIPS16_INSERT_OPERAND (RY, *ip, lastregno); |
| 9539 | continue; |
| 9540 | } |
| 9541 | break; |
| 9542 | |
| 9543 | case '(': |
| 9544 | case ')': |
| 9545 | if (*s++ == c) |
| 9546 | continue; |
| 9547 | break; |
| 9548 | |
| 9549 | case 'v': |
| 9550 | case 'w': |
| 9551 | if (s[0] != '$') |
| 9552 | { |
| 9553 | if (c == 'v') |
| 9554 | MIPS16_INSERT_OPERAND (RX, *ip, lastregno); |
| 9555 | else |
| 9556 | MIPS16_INSERT_OPERAND (RY, *ip, lastregno); |
| 9557 | ++args; |
| 9558 | continue; |
| 9559 | } |
| 9560 | /* Fall through. */ |
| 9561 | case 'x': |
| 9562 | case 'y': |
| 9563 | case 'z': |
| 9564 | case 'Z': |
| 9565 | case '0': |
| 9566 | case 'S': |
| 9567 | case 'R': |
| 9568 | case 'X': |
| 9569 | case 'Y': |
| 9570 | if (s[0] != '$') |
| 9571 | break; |
| 9572 | s_reset = s; |
| 9573 | if (ISDIGIT (s[1])) |
| 9574 | { |
| 9575 | ++s; |
| 9576 | regno = 0; |
| 9577 | do |
| 9578 | { |
| 9579 | regno *= 10; |
| 9580 | regno += *s - '0'; |
| 9581 | ++s; |
| 9582 | } |
| 9583 | while (ISDIGIT (*s)); |
| 9584 | if (regno > 31) |
| 9585 | { |
| 9586 | as_bad (_("invalid register number (%d)"), regno); |
| 9587 | regno = 2; |
| 9588 | } |
| 9589 | } |
| 9590 | else |
| 9591 | { |
| 9592 | if (s[1] == 'r' && s[2] == 'a') |
| 9593 | { |
| 9594 | s += 3; |
| 9595 | regno = RA; |
| 9596 | } |
| 9597 | else if (s[1] == 'f' && s[2] == 'p') |
| 9598 | { |
| 9599 | s += 3; |
| 9600 | regno = FP; |
| 9601 | } |
| 9602 | else if (s[1] == 's' && s[2] == 'p') |
| 9603 | { |
| 9604 | s += 3; |
| 9605 | regno = SP; |
| 9606 | } |
| 9607 | else if (s[1] == 'g' && s[2] == 'p') |
| 9608 | { |
| 9609 | s += 3; |
| 9610 | regno = GP; |
| 9611 | } |
| 9612 | else if (s[1] == 'a' && s[2] == 't') |
| 9613 | { |
| 9614 | s += 3; |
| 9615 | regno = AT; |
| 9616 | } |
| 9617 | else if (s[1] == 'k' && s[2] == 't' && s[3] == '0') |
| 9618 | { |
| 9619 | s += 4; |
| 9620 | regno = KT0; |
| 9621 | } |
| 9622 | else if (s[1] == 'k' && s[2] == 't' && s[3] == '1') |
| 9623 | { |
| 9624 | s += 4; |
| 9625 | regno = KT1; |
| 9626 | } |
| 9627 | else if (s[1] == 'z' && s[2] == 'e' && s[3] == 'r' && s[4] == 'o') |
| 9628 | { |
| 9629 | s += 5; |
| 9630 | regno = ZERO; |
| 9631 | } |
| 9632 | else |
| 9633 | break; |
| 9634 | } |
| 9635 | |
| 9636 | if (*s == ' ') |
| 9637 | ++s; |
| 9638 | if (args[1] != *s) |
| 9639 | { |
| 9640 | if (c == 'v' || c == 'w') |
| 9641 | { |
| 9642 | regno = mips16_to_32_reg_map[lastregno]; |
| 9643 | s = s_reset; |
| 9644 | ++args; |
| 9645 | } |
| 9646 | } |
| 9647 | |
| 9648 | switch (c) |
| 9649 | { |
| 9650 | case 'x': |
| 9651 | case 'y': |
| 9652 | case 'z': |
| 9653 | case 'v': |
| 9654 | case 'w': |
| 9655 | case 'Z': |
| 9656 | regno = mips32_to_16_reg_map[regno]; |
| 9657 | break; |
| 9658 | |
| 9659 | case '0': |
| 9660 | if (regno != 0) |
| 9661 | regno = ILLEGAL_REG; |
| 9662 | break; |
| 9663 | |
| 9664 | case 'S': |
| 9665 | if (regno != SP) |
| 9666 | regno = ILLEGAL_REG; |
| 9667 | break; |
| 9668 | |
| 9669 | case 'R': |
| 9670 | if (regno != RA) |
| 9671 | regno = ILLEGAL_REG; |
| 9672 | break; |
| 9673 | |
| 9674 | case 'X': |
| 9675 | case 'Y': |
| 9676 | if (regno == AT && ! mips_opts.noat) |
| 9677 | as_warn (_("used $at without \".set noat\"")); |
| 9678 | break; |
| 9679 | |
| 9680 | default: |
| 9681 | internalError (); |
| 9682 | } |
| 9683 | |
| 9684 | if (regno == ILLEGAL_REG) |
| 9685 | break; |
| 9686 | |
| 9687 | switch (c) |
| 9688 | { |
| 9689 | case 'x': |
| 9690 | case 'v': |
| 9691 | MIPS16_INSERT_OPERAND (RX, *ip, regno); |
| 9692 | break; |
| 9693 | case 'y': |
| 9694 | case 'w': |
| 9695 | MIPS16_INSERT_OPERAND (RY, *ip, regno); |
| 9696 | break; |
| 9697 | case 'z': |
| 9698 | MIPS16_INSERT_OPERAND (RZ, *ip, regno); |
| 9699 | break; |
| 9700 | case 'Z': |
| 9701 | MIPS16_INSERT_OPERAND (MOVE32Z, *ip, regno); |
| 9702 | case '0': |
| 9703 | case 'S': |
| 9704 | case 'R': |
| 9705 | break; |
| 9706 | case 'X': |
| 9707 | MIPS16_INSERT_OPERAND (REGR32, *ip, regno); |
| 9708 | break; |
| 9709 | case 'Y': |
| 9710 | regno = ((regno & 7) << 2) | ((regno & 0x18) >> 3); |
| 9711 | MIPS16_INSERT_OPERAND (REG32R, *ip, regno); |
| 9712 | break; |
| 9713 | default: |
| 9714 | internalError (); |
| 9715 | } |
| 9716 | |
| 9717 | lastregno = regno; |
| 9718 | continue; |
| 9719 | |
| 9720 | case 'P': |
| 9721 | if (strncmp (s, "$pc", 3) == 0) |
| 9722 | { |
| 9723 | s += 3; |
| 9724 | continue; |
| 9725 | } |
| 9726 | break; |
| 9727 | |
| 9728 | case '5': |
| 9729 | case 'H': |
| 9730 | case 'W': |
| 9731 | case 'D': |
| 9732 | case 'j': |
| 9733 | case 'V': |
| 9734 | case 'C': |
| 9735 | case 'U': |
| 9736 | case 'k': |
| 9737 | case 'K': |
| 9738 | i = my_getSmallExpression (&imm_expr, imm_reloc, s); |
| 9739 | if (i > 0) |
| 9740 | { |
| 9741 | if (imm_expr.X_op != O_constant) |
| 9742 | { |
| 9743 | mips16_ext = TRUE; |
| 9744 | ip->use_extend = TRUE; |
| 9745 | ip->extend = 0; |
| 9746 | } |
| 9747 | else |
| 9748 | { |
| 9749 | /* We need to relax this instruction. */ |
| 9750 | *offset_reloc = *imm_reloc; |
| 9751 | *imm_reloc = (int) BFD_RELOC_UNUSED + c; |
| 9752 | } |
| 9753 | s = expr_end; |
| 9754 | continue; |
| 9755 | } |
| 9756 | *imm_reloc = BFD_RELOC_UNUSED; |
| 9757 | /* Fall through. */ |
| 9758 | case '<': |
| 9759 | case '>': |
| 9760 | case '[': |
| 9761 | case ']': |
| 9762 | case '4': |
| 9763 | case '8': |
| 9764 | my_getExpression (&imm_expr, s); |
| 9765 | if (imm_expr.X_op == O_register) |
| 9766 | { |
| 9767 | /* What we thought was an expression turned out to |
| 9768 | be a register. */ |
| 9769 | |
| 9770 | if (s[0] == '(' && args[1] == '(') |
| 9771 | { |
| 9772 | /* It looks like the expression was omitted |
| 9773 | before a register indirection, which means |
| 9774 | that the expression is implicitly zero. We |
| 9775 | still set up imm_expr, so that we handle |
| 9776 | explicit extensions correctly. */ |
| 9777 | imm_expr.X_op = O_constant; |
| 9778 | imm_expr.X_add_number = 0; |
| 9779 | *imm_reloc = (int) BFD_RELOC_UNUSED + c; |
| 9780 | continue; |
| 9781 | } |
| 9782 | |
| 9783 | break; |
| 9784 | } |
| 9785 | |
| 9786 | /* We need to relax this instruction. */ |
| 9787 | *imm_reloc = (int) BFD_RELOC_UNUSED + c; |
| 9788 | s = expr_end; |
| 9789 | continue; |
| 9790 | |
| 9791 | case 'p': |
| 9792 | case 'q': |
| 9793 | case 'A': |
| 9794 | case 'B': |
| 9795 | case 'E': |
| 9796 | /* We use offset_reloc rather than imm_reloc for the PC |
| 9797 | relative operands. This lets macros with both |
| 9798 | immediate and address operands work correctly. */ |
| 9799 | my_getExpression (&offset_expr, s); |
| 9800 | |
| 9801 | if (offset_expr.X_op == O_register) |
| 9802 | break; |
| 9803 | |
| 9804 | /* We need to relax this instruction. */ |
| 9805 | *offset_reloc = (int) BFD_RELOC_UNUSED + c; |
| 9806 | s = expr_end; |
| 9807 | continue; |
| 9808 | |
| 9809 | case '6': /* break code */ |
| 9810 | my_getExpression (&imm_expr, s); |
| 9811 | check_absolute_expr (ip, &imm_expr); |
| 9812 | if ((unsigned long) imm_expr.X_add_number > 63) |
| 9813 | as_warn (_("Invalid value for `%s' (%lu)"), |
| 9814 | ip->insn_mo->name, |
| 9815 | (unsigned long) imm_expr.X_add_number); |
| 9816 | MIPS16_INSERT_OPERAND (IMM6, *ip, imm_expr.X_add_number); |
| 9817 | imm_expr.X_op = O_absent; |
| 9818 | s = expr_end; |
| 9819 | continue; |
| 9820 | |
| 9821 | case 'a': /* 26 bit address */ |
| 9822 | my_getExpression (&offset_expr, s); |
| 9823 | s = expr_end; |
| 9824 | *offset_reloc = BFD_RELOC_MIPS16_JMP; |
| 9825 | ip->insn_opcode <<= 16; |
| 9826 | continue; |
| 9827 | |
| 9828 | case 'l': /* register list for entry macro */ |
| 9829 | case 'L': /* register list for exit macro */ |
| 9830 | { |
| 9831 | int mask; |
| 9832 | |
| 9833 | if (c == 'l') |
| 9834 | mask = 0; |
| 9835 | else |
| 9836 | mask = 7 << 3; |
| 9837 | while (*s != '\0') |
| 9838 | { |
| 9839 | int freg, reg1, reg2; |
| 9840 | |
| 9841 | while (*s == ' ' || *s == ',') |
| 9842 | ++s; |
| 9843 | if (*s != '$') |
| 9844 | { |
| 9845 | as_bad (_("can't parse register list")); |
| 9846 | break; |
| 9847 | } |
| 9848 | ++s; |
| 9849 | if (*s != 'f') |
| 9850 | freg = 0; |
| 9851 | else |
| 9852 | { |
| 9853 | freg = 1; |
| 9854 | ++s; |
| 9855 | } |
| 9856 | reg1 = 0; |
| 9857 | while (ISDIGIT (*s)) |
| 9858 | { |
| 9859 | reg1 *= 10; |
| 9860 | reg1 += *s - '0'; |
| 9861 | ++s; |
| 9862 | } |
| 9863 | if (*s == ' ') |
| 9864 | ++s; |
| 9865 | if (*s != '-') |
| 9866 | reg2 = reg1; |
| 9867 | else |
| 9868 | { |
| 9869 | ++s; |
| 9870 | if (*s != '$') |
| 9871 | break; |
| 9872 | ++s; |
| 9873 | if (freg) |
| 9874 | { |
| 9875 | if (*s == 'f') |
| 9876 | ++s; |
| 9877 | else |
| 9878 | { |
| 9879 | as_bad (_("invalid register list")); |
| 9880 | break; |
| 9881 | } |
| 9882 | } |
| 9883 | reg2 = 0; |
| 9884 | while (ISDIGIT (*s)) |
| 9885 | { |
| 9886 | reg2 *= 10; |
| 9887 | reg2 += *s - '0'; |
| 9888 | ++s; |
| 9889 | } |
| 9890 | } |
| 9891 | if (freg && reg1 == 0 && reg2 == 0 && c == 'L') |
| 9892 | { |
| 9893 | mask &= ~ (7 << 3); |
| 9894 | mask |= 5 << 3; |
| 9895 | } |
| 9896 | else if (freg && reg1 == 0 && reg2 == 1 && c == 'L') |
| 9897 | { |
| 9898 | mask &= ~ (7 << 3); |
| 9899 | mask |= 6 << 3; |
| 9900 | } |
| 9901 | else if (reg1 == 4 && reg2 >= 4 && reg2 <= 7 && c != 'L') |
| 9902 | mask |= (reg2 - 3) << 3; |
| 9903 | else if (reg1 == 16 && reg2 >= 16 && reg2 <= 17) |
| 9904 | mask |= (reg2 - 15) << 1; |
| 9905 | else if (reg1 == RA && reg2 == RA) |
| 9906 | mask |= 1; |
| 9907 | else |
| 9908 | { |
| 9909 | as_bad (_("invalid register list")); |
| 9910 | break; |
| 9911 | } |
| 9912 | } |
| 9913 | /* The mask is filled in in the opcode table for the |
| 9914 | benefit of the disassembler. We remove it before |
| 9915 | applying the actual mask. */ |
| 9916 | ip->insn_opcode &= ~ ((7 << 3) << MIPS16OP_SH_IMM6); |
| 9917 | ip->insn_opcode |= mask << MIPS16OP_SH_IMM6; |
| 9918 | } |
| 9919 | continue; |
| 9920 | |
| 9921 | case 'm': /* Register list for save insn. */ |
| 9922 | case 'M': /* Register list for restore insn. */ |
| 9923 | { |
| 9924 | int opcode = 0; |
| 9925 | int framesz = 0, seen_framesz = 0; |
| 9926 | int args = 0, statics = 0, sregs = 0; |
| 9927 | |
| 9928 | while (*s != '\0') |
| 9929 | { |
| 9930 | unsigned int reg1, reg2; |
| 9931 | |
| 9932 | SKIP_SPACE_TABS (s); |
| 9933 | while (*s == ',') |
| 9934 | ++s; |
| 9935 | SKIP_SPACE_TABS (s); |
| 9936 | |
| 9937 | my_getExpression (&imm_expr, s); |
| 9938 | if (imm_expr.X_op == O_constant) |
| 9939 | { |
| 9940 | /* Handle the frame size. */ |
| 9941 | if (seen_framesz) |
| 9942 | { |
| 9943 | as_bad (_("more than one frame size in list")); |
| 9944 | break; |
| 9945 | } |
| 9946 | seen_framesz = 1; |
| 9947 | framesz = imm_expr.X_add_number; |
| 9948 | imm_expr.X_op = O_absent; |
| 9949 | s = expr_end; |
| 9950 | continue; |
| 9951 | } |
| 9952 | |
| 9953 | if (*s != '$') |
| 9954 | { |
| 9955 | as_bad (_("can't parse register list")); |
| 9956 | break; |
| 9957 | } |
| 9958 | ++s; |
| 9959 | |
| 9960 | reg1 = 0; |
| 9961 | while (ISDIGIT (*s)) |
| 9962 | { |
| 9963 | reg1 *= 10; |
| 9964 | reg1 += *s - '0'; |
| 9965 | ++s; |
| 9966 | } |
| 9967 | SKIP_SPACE_TABS (s); |
| 9968 | if (*s != '-') |
| 9969 | reg2 = reg1; |
| 9970 | else |
| 9971 | { |
| 9972 | ++s; |
| 9973 | if (*s != '$') |
| 9974 | { |
| 9975 | as_bad (_("can't parse register list")); |
| 9976 | break; |
| 9977 | } |
| 9978 | ++s; |
| 9979 | reg2 = 0; |
| 9980 | while (ISDIGIT (*s)) |
| 9981 | { |
| 9982 | reg2 *= 10; |
| 9983 | reg2 += *s - '0'; |
| 9984 | ++s; |
| 9985 | } |
| 9986 | } |
| 9987 | |
| 9988 | while (reg1 <= reg2) |
| 9989 | { |
| 9990 | if (reg1 >= 4 && reg1 <= 7) |
| 9991 | { |
| 9992 | if (c == 'm' && !seen_framesz) |
| 9993 | /* args $a0-$a3 */ |
| 9994 | args |= 1 << (reg1 - 4); |
| 9995 | else |
| 9996 | /* statics $a0-$a3 */ |
| 9997 | statics |= 1 << (reg1 - 4); |
| 9998 | } |
| 9999 | else if ((reg1 >= 16 && reg1 <= 23) || reg1 == 30) |
| 10000 | { |
| 10001 | /* $s0-$s8 */ |
| 10002 | sregs |= 1 << ((reg1 == 30) ? 8 : (reg1 - 16)); |
| 10003 | } |
| 10004 | else if (reg1 == 31) |
| 10005 | { |
| 10006 | /* Add $ra to insn. */ |
| 10007 | opcode |= 0x40; |
| 10008 | } |
| 10009 | else |
| 10010 | { |
| 10011 | as_bad (_("unexpected register in list")); |
| 10012 | break; |
| 10013 | } |
| 10014 | if (++reg1 == 24) |
| 10015 | reg1 = 30; |
| 10016 | } |
| 10017 | } |
| 10018 | |
| 10019 | /* Encode args/statics combination. */ |
| 10020 | if (args & statics) |
| 10021 | as_bad (_("arg/static registers overlap")); |
| 10022 | else if (args == 0xf) |
| 10023 | /* All $a0-$a3 are args. */ |
| 10024 | opcode |= MIPS16_ALL_ARGS << 16; |
| 10025 | else if (statics == 0xf) |
| 10026 | /* All $a0-$a3 are statics. */ |
| 10027 | opcode |= MIPS16_ALL_STATICS << 16; |
| 10028 | else |
| 10029 | { |
| 10030 | int narg = 0, nstat = 0; |
| 10031 | |
| 10032 | /* Count arg registers. */ |
| 10033 | while (args & 0x1) |
| 10034 | { |
| 10035 | args >>= 1; |
| 10036 | narg++; |
| 10037 | } |
| 10038 | if (args != 0) |
| 10039 | as_bad (_("invalid arg register list")); |
| 10040 | |
| 10041 | /* Count static registers. */ |
| 10042 | while (statics & 0x8) |
| 10043 | { |
| 10044 | statics = (statics << 1) & 0xf; |
| 10045 | nstat++; |
| 10046 | } |
| 10047 | if (statics != 0) |
| 10048 | as_bad (_("invalid static register list")); |
| 10049 | |
| 10050 | /* Encode args/statics. */ |
| 10051 | opcode |= ((narg << 2) | nstat) << 16; |
| 10052 | } |
| 10053 | |
| 10054 | /* Encode $s0/$s1. */ |
| 10055 | if (sregs & (1 << 0)) /* $s0 */ |
| 10056 | opcode |= 0x20; |
| 10057 | if (sregs & (1 << 1)) /* $s1 */ |
| 10058 | opcode |= 0x10; |
| 10059 | sregs >>= 2; |
| 10060 | |
| 10061 | if (sregs != 0) |
| 10062 | { |
| 10063 | /* Count regs $s2-$s8. */ |
| 10064 | int nsreg = 0; |
| 10065 | while (sregs & 1) |
| 10066 | { |
| 10067 | sregs >>= 1; |
| 10068 | nsreg++; |
| 10069 | } |
| 10070 | if (sregs != 0) |
| 10071 | as_bad (_("invalid static register list")); |
| 10072 | /* Encode $s2-$s8. */ |
| 10073 | opcode |= nsreg << 24; |
| 10074 | } |
| 10075 | |
| 10076 | /* Encode frame size. */ |
| 10077 | if (!seen_framesz) |
| 10078 | as_bad (_("missing frame size")); |
| 10079 | else if ((framesz & 7) != 0 || framesz < 0 |
| 10080 | || framesz > 0xff * 8) |
| 10081 | as_bad (_("invalid frame size")); |
| 10082 | else if (framesz != 128 || (opcode >> 16) != 0) |
| 10083 | { |
| 10084 | framesz /= 8; |
| 10085 | opcode |= (((framesz & 0xf0) << 16) |
| 10086 | | (framesz & 0x0f)); |
| 10087 | } |
| 10088 | |
| 10089 | /* Finally build the instruction. */ |
| 10090 | if ((opcode >> 16) != 0 || framesz == 0) |
| 10091 | { |
| 10092 | ip->use_extend = TRUE; |
| 10093 | ip->extend = opcode >> 16; |
| 10094 | } |
| 10095 | ip->insn_opcode |= opcode & 0x7f; |
| 10096 | } |
| 10097 | continue; |
| 10098 | |
| 10099 | case 'e': /* extend code */ |
| 10100 | my_getExpression (&imm_expr, s); |
| 10101 | check_absolute_expr (ip, &imm_expr); |
| 10102 | if ((unsigned long) imm_expr.X_add_number > 0x7ff) |
| 10103 | { |
| 10104 | as_warn (_("Invalid value for `%s' (%lu)"), |
| 10105 | ip->insn_mo->name, |
| 10106 | (unsigned long) imm_expr.X_add_number); |
| 10107 | imm_expr.X_add_number &= 0x7ff; |
| 10108 | } |
| 10109 | ip->insn_opcode |= imm_expr.X_add_number; |
| 10110 | imm_expr.X_op = O_absent; |
| 10111 | s = expr_end; |
| 10112 | continue; |
| 10113 | |
| 10114 | default: |
| 10115 | internalError (); |
| 10116 | } |
| 10117 | break; |
| 10118 | } |
| 10119 | |
| 10120 | /* Args don't match. */ |
| 10121 | if (insn + 1 < &mips16_opcodes[bfd_mips16_num_opcodes] && |
| 10122 | strcmp (insn->name, insn[1].name) == 0) |
| 10123 | { |
| 10124 | ++insn; |
| 10125 | s = argsstart; |
| 10126 | continue; |
| 10127 | } |
| 10128 | |
| 10129 | insn_error = _("illegal operands"); |
| 10130 | |
| 10131 | return; |
| 10132 | } |
| 10133 | } |
| 10134 | |
| 10135 | /* This structure holds information we know about a mips16 immediate |
| 10136 | argument type. */ |
| 10137 | |
| 10138 | struct mips16_immed_operand |
| 10139 | { |
| 10140 | /* The type code used in the argument string in the opcode table. */ |
| 10141 | int type; |
| 10142 | /* The number of bits in the short form of the opcode. */ |
| 10143 | int nbits; |
| 10144 | /* The number of bits in the extended form of the opcode. */ |
| 10145 | int extbits; |
| 10146 | /* The amount by which the short form is shifted when it is used; |
| 10147 | for example, the sw instruction has a shift count of 2. */ |
| 10148 | int shift; |
| 10149 | /* The amount by which the short form is shifted when it is stored |
| 10150 | into the instruction code. */ |
| 10151 | int op_shift; |
| 10152 | /* Non-zero if the short form is unsigned. */ |
| 10153 | int unsp; |
| 10154 | /* Non-zero if the extended form is unsigned. */ |
| 10155 | int extu; |
| 10156 | /* Non-zero if the value is PC relative. */ |
| 10157 | int pcrel; |
| 10158 | }; |
| 10159 | |
| 10160 | /* The mips16 immediate operand types. */ |
| 10161 | |
| 10162 | static const struct mips16_immed_operand mips16_immed_operands[] = |
| 10163 | { |
| 10164 | { '<', 3, 5, 0, MIPS16OP_SH_RZ, 1, 1, 0 }, |
| 10165 | { '>', 3, 5, 0, MIPS16OP_SH_RX, 1, 1, 0 }, |
| 10166 | { '[', 3, 6, 0, MIPS16OP_SH_RZ, 1, 1, 0 }, |
| 10167 | { ']', 3, 6, 0, MIPS16OP_SH_RX, 1, 1, 0 }, |
| 10168 | { '4', 4, 15, 0, MIPS16OP_SH_IMM4, 0, 0, 0 }, |
| 10169 | { '5', 5, 16, 0, MIPS16OP_SH_IMM5, 1, 0, 0 }, |
| 10170 | { 'H', 5, 16, 1, MIPS16OP_SH_IMM5, 1, 0, 0 }, |
| 10171 | { 'W', 5, 16, 2, MIPS16OP_SH_IMM5, 1, 0, 0 }, |
| 10172 | { 'D', 5, 16, 3, MIPS16OP_SH_IMM5, 1, 0, 0 }, |
| 10173 | { 'j', 5, 16, 0, MIPS16OP_SH_IMM5, 0, 0, 0 }, |
| 10174 | { '8', 8, 16, 0, MIPS16OP_SH_IMM8, 1, 0, 0 }, |
| 10175 | { 'V', 8, 16, 2, MIPS16OP_SH_IMM8, 1, 0, 0 }, |
| 10176 | { 'C', 8, 16, 3, MIPS16OP_SH_IMM8, 1, 0, 0 }, |
| 10177 | { 'U', 8, 16, 0, MIPS16OP_SH_IMM8, 1, 1, 0 }, |
| 10178 | { 'k', 8, 16, 0, MIPS16OP_SH_IMM8, 0, 0, 0 }, |
| 10179 | { 'K', 8, 16, 3, MIPS16OP_SH_IMM8, 0, 0, 0 }, |
| 10180 | { 'p', 8, 16, 0, MIPS16OP_SH_IMM8, 0, 0, 1 }, |
| 10181 | { 'q', 11, 16, 0, MIPS16OP_SH_IMM8, 0, 0, 1 }, |
| 10182 | { 'A', 8, 16, 2, MIPS16OP_SH_IMM8, 1, 0, 1 }, |
| 10183 | { 'B', 5, 16, 3, MIPS16OP_SH_IMM5, 1, 0, 1 }, |
| 10184 | { 'E', 5, 16, 2, MIPS16OP_SH_IMM5, 1, 0, 1 } |
| 10185 | }; |
| 10186 | |
| 10187 | #define MIPS16_NUM_IMMED \ |
| 10188 | (sizeof mips16_immed_operands / sizeof mips16_immed_operands[0]) |
| 10189 | |
| 10190 | /* Handle a mips16 instruction with an immediate value. This or's the |
| 10191 | small immediate value into *INSN. It sets *USE_EXTEND to indicate |
| 10192 | whether an extended value is needed; if one is needed, it sets |
| 10193 | *EXTEND to the value. The argument type is TYPE. The value is VAL. |
| 10194 | If SMALL is true, an unextended opcode was explicitly requested. |
| 10195 | If EXT is true, an extended opcode was explicitly requested. If |
| 10196 | WARN is true, warn if EXT does not match reality. */ |
| 10197 | |
| 10198 | static void |
| 10199 | mips16_immed (char *file, unsigned int line, int type, offsetT val, |
| 10200 | bfd_boolean warn, bfd_boolean small, bfd_boolean ext, |
| 10201 | unsigned long *insn, bfd_boolean *use_extend, |
| 10202 | unsigned short *extend) |
| 10203 | { |
| 10204 | register const struct mips16_immed_operand *op; |
| 10205 | int mintiny, maxtiny; |
| 10206 | bfd_boolean needext; |
| 10207 | |
| 10208 | op = mips16_immed_operands; |
| 10209 | while (op->type != type) |
| 10210 | { |
| 10211 | ++op; |
| 10212 | assert (op < mips16_immed_operands + MIPS16_NUM_IMMED); |
| 10213 | } |
| 10214 | |
| 10215 | if (op->unsp) |
| 10216 | { |
| 10217 | if (type == '<' || type == '>' || type == '[' || type == ']') |
| 10218 | { |
| 10219 | mintiny = 1; |
| 10220 | maxtiny = 1 << op->nbits; |
| 10221 | } |
| 10222 | else |
| 10223 | { |
| 10224 | mintiny = 0; |
| 10225 | maxtiny = (1 << op->nbits) - 1; |
| 10226 | } |
| 10227 | } |
| 10228 | else |
| 10229 | { |
| 10230 | mintiny = - (1 << (op->nbits - 1)); |
| 10231 | maxtiny = (1 << (op->nbits - 1)) - 1; |
| 10232 | } |
| 10233 | |
| 10234 | /* Branch offsets have an implicit 0 in the lowest bit. */ |
| 10235 | if (type == 'p' || type == 'q') |
| 10236 | val /= 2; |
| 10237 | |
| 10238 | if ((val & ((1 << op->shift) - 1)) != 0 |
| 10239 | || val < (mintiny << op->shift) |
| 10240 | || val > (maxtiny << op->shift)) |
| 10241 | needext = TRUE; |
| 10242 | else |
| 10243 | needext = FALSE; |
| 10244 | |
| 10245 | if (warn && ext && ! needext) |
| 10246 | as_warn_where (file, line, |
| 10247 | _("extended operand requested but not required")); |
| 10248 | if (small && needext) |
| 10249 | as_bad_where (file, line, _("invalid unextended operand value")); |
| 10250 | |
| 10251 | if (small || (! ext && ! needext)) |
| 10252 | { |
| 10253 | int insnval; |
| 10254 | |
| 10255 | *use_extend = FALSE; |
| 10256 | insnval = ((val >> op->shift) & ((1 << op->nbits) - 1)); |
| 10257 | insnval <<= op->op_shift; |
| 10258 | *insn |= insnval; |
| 10259 | } |
| 10260 | else |
| 10261 | { |
| 10262 | long minext, maxext; |
| 10263 | int extval; |
| 10264 | |
| 10265 | if (op->extu) |
| 10266 | { |
| 10267 | minext = 0; |
| 10268 | maxext = (1 << op->extbits) - 1; |
| 10269 | } |
| 10270 | else |
| 10271 | { |
| 10272 | minext = - (1 << (op->extbits - 1)); |
| 10273 | maxext = (1 << (op->extbits - 1)) - 1; |
| 10274 | } |
| 10275 | if (val < minext || val > maxext) |
| 10276 | as_bad_where (file, line, |
| 10277 | _("operand value out of range for instruction")); |
| 10278 | |
| 10279 | *use_extend = TRUE; |
| 10280 | if (op->extbits == 16) |
| 10281 | { |
| 10282 | extval = ((val >> 11) & 0x1f) | (val & 0x7e0); |
| 10283 | val &= 0x1f; |
| 10284 | } |
| 10285 | else if (op->extbits == 15) |
| 10286 | { |
| 10287 | extval = ((val >> 11) & 0xf) | (val & 0x7f0); |
| 10288 | val &= 0xf; |
| 10289 | } |
| 10290 | else |
| 10291 | { |
| 10292 | extval = ((val & 0x1f) << 6) | (val & 0x20); |
| 10293 | val = 0; |
| 10294 | } |
| 10295 | |
| 10296 | *extend = (unsigned short) extval; |
| 10297 | *insn |= val; |
| 10298 | } |
| 10299 | } |
| 10300 | \f |
| 10301 | struct percent_op_match |
| 10302 | { |
| 10303 | const char *str; |
| 10304 | bfd_reloc_code_real_type reloc; |
| 10305 | }; |
| 10306 | |
| 10307 | static const struct percent_op_match mips_percent_op[] = |
| 10308 | { |
| 10309 | {"%lo", BFD_RELOC_LO16}, |
| 10310 | #ifdef OBJ_ELF |
| 10311 | {"%call_hi", BFD_RELOC_MIPS_CALL_HI16}, |
| 10312 | {"%call_lo", BFD_RELOC_MIPS_CALL_LO16}, |
| 10313 | {"%call16", BFD_RELOC_MIPS_CALL16}, |
| 10314 | {"%got_disp", BFD_RELOC_MIPS_GOT_DISP}, |
| 10315 | {"%got_page", BFD_RELOC_MIPS_GOT_PAGE}, |
| 10316 | {"%got_ofst", BFD_RELOC_MIPS_GOT_OFST}, |
| 10317 | {"%got_hi", BFD_RELOC_MIPS_GOT_HI16}, |
| 10318 | {"%got_lo", BFD_RELOC_MIPS_GOT_LO16}, |
| 10319 | {"%got", BFD_RELOC_MIPS_GOT16}, |
| 10320 | {"%gp_rel", BFD_RELOC_GPREL16}, |
| 10321 | {"%half", BFD_RELOC_16}, |
| 10322 | {"%highest", BFD_RELOC_MIPS_HIGHEST}, |
| 10323 | {"%higher", BFD_RELOC_MIPS_HIGHER}, |
| 10324 | {"%neg", BFD_RELOC_MIPS_SUB}, |
| 10325 | {"%tlsgd", BFD_RELOC_MIPS_TLS_GD}, |
| 10326 | {"%tlsldm", BFD_RELOC_MIPS_TLS_LDM}, |
| 10327 | {"%dtprel_hi", BFD_RELOC_MIPS_TLS_DTPREL_HI16}, |
| 10328 | {"%dtprel_lo", BFD_RELOC_MIPS_TLS_DTPREL_LO16}, |
| 10329 | {"%tprel_hi", BFD_RELOC_MIPS_TLS_TPREL_HI16}, |
| 10330 | {"%tprel_lo", BFD_RELOC_MIPS_TLS_TPREL_LO16}, |
| 10331 | {"%gottprel", BFD_RELOC_MIPS_TLS_GOTTPREL}, |
| 10332 | #endif |
| 10333 | {"%hi", BFD_RELOC_HI16_S} |
| 10334 | }; |
| 10335 | |
| 10336 | static const struct percent_op_match mips16_percent_op[] = |
| 10337 | { |
| 10338 | {"%lo", BFD_RELOC_MIPS16_LO16}, |
| 10339 | {"%gprel", BFD_RELOC_MIPS16_GPREL}, |
| 10340 | {"%hi", BFD_RELOC_MIPS16_HI16_S} |
| 10341 | }; |
| 10342 | |
| 10343 | |
| 10344 | /* Return true if *STR points to a relocation operator. When returning true, |
| 10345 | move *STR over the operator and store its relocation code in *RELOC. |
| 10346 | Leave both *STR and *RELOC alone when returning false. */ |
| 10347 | |
| 10348 | static bfd_boolean |
| 10349 | parse_relocation (char **str, bfd_reloc_code_real_type *reloc) |
| 10350 | { |
| 10351 | const struct percent_op_match *percent_op; |
| 10352 | size_t limit, i; |
| 10353 | |
| 10354 | if (mips_opts.mips16) |
| 10355 | { |
| 10356 | percent_op = mips16_percent_op; |
| 10357 | limit = ARRAY_SIZE (mips16_percent_op); |
| 10358 | } |
| 10359 | else |
| 10360 | { |
| 10361 | percent_op = mips_percent_op; |
| 10362 | limit = ARRAY_SIZE (mips_percent_op); |
| 10363 | } |
| 10364 | |
| 10365 | for (i = 0; i < limit; i++) |
| 10366 | if (strncasecmp (*str, percent_op[i].str, strlen (percent_op[i].str)) == 0) |
| 10367 | { |
| 10368 | int len = strlen (percent_op[i].str); |
| 10369 | |
| 10370 | if (!ISSPACE ((*str)[len]) && (*str)[len] != '(') |
| 10371 | continue; |
| 10372 | |
| 10373 | *str += strlen (percent_op[i].str); |
| 10374 | *reloc = percent_op[i].reloc; |
| 10375 | |
| 10376 | /* Check whether the output BFD supports this relocation. |
| 10377 | If not, issue an error and fall back on something safe. */ |
| 10378 | if (!bfd_reloc_type_lookup (stdoutput, percent_op[i].reloc)) |
| 10379 | { |
| 10380 | as_bad ("relocation %s isn't supported by the current ABI", |
| 10381 | percent_op[i].str); |
| 10382 | *reloc = BFD_RELOC_UNUSED; |
| 10383 | } |
| 10384 | return TRUE; |
| 10385 | } |
| 10386 | return FALSE; |
| 10387 | } |
| 10388 | |
| 10389 | |
| 10390 | /* Parse string STR as a 16-bit relocatable operand. Store the |
| 10391 | expression in *EP and the relocations in the array starting |
| 10392 | at RELOC. Return the number of relocation operators used. |
| 10393 | |
| 10394 | On exit, EXPR_END points to the first character after the expression. */ |
| 10395 | |
| 10396 | static size_t |
| 10397 | my_getSmallExpression (expressionS *ep, bfd_reloc_code_real_type *reloc, |
| 10398 | char *str) |
| 10399 | { |
| 10400 | bfd_reloc_code_real_type reversed_reloc[3]; |
| 10401 | size_t reloc_index, i; |
| 10402 | int crux_depth, str_depth; |
| 10403 | char *crux; |
| 10404 | |
| 10405 | /* Search for the start of the main expression, recoding relocations |
| 10406 | in REVERSED_RELOC. End the loop with CRUX pointing to the start |
| 10407 | of the main expression and with CRUX_DEPTH containing the number |
| 10408 | of open brackets at that point. */ |
| 10409 | reloc_index = -1; |
| 10410 | str_depth = 0; |
| 10411 | do |
| 10412 | { |
| 10413 | reloc_index++; |
| 10414 | crux = str; |
| 10415 | crux_depth = str_depth; |
| 10416 | |
| 10417 | /* Skip over whitespace and brackets, keeping count of the number |
| 10418 | of brackets. */ |
| 10419 | while (*str == ' ' || *str == '\t' || *str == '(') |
| 10420 | if (*str++ == '(') |
| 10421 | str_depth++; |
| 10422 | } |
| 10423 | while (*str == '%' |
| 10424 | && reloc_index < (HAVE_NEWABI ? 3 : 1) |
| 10425 | && parse_relocation (&str, &reversed_reloc[reloc_index])); |
| 10426 | |
| 10427 | my_getExpression (ep, crux); |
| 10428 | str = expr_end; |
| 10429 | |
| 10430 | /* Match every open bracket. */ |
| 10431 | while (crux_depth > 0 && (*str == ')' || *str == ' ' || *str == '\t')) |
| 10432 | if (*str++ == ')') |
| 10433 | crux_depth--; |
| 10434 | |
| 10435 | if (crux_depth > 0) |
| 10436 | as_bad ("unclosed '('"); |
| 10437 | |
| 10438 | expr_end = str; |
| 10439 | |
| 10440 | if (reloc_index != 0) |
| 10441 | { |
| 10442 | prev_reloc_op_frag = frag_now; |
| 10443 | for (i = 0; i < reloc_index; i++) |
| 10444 | reloc[i] = reversed_reloc[reloc_index - 1 - i]; |
| 10445 | } |
| 10446 | |
| 10447 | return reloc_index; |
| 10448 | } |
| 10449 | |
| 10450 | static void |
| 10451 | my_getExpression (expressionS *ep, char *str) |
| 10452 | { |
| 10453 | char *save_in; |
| 10454 | valueT val; |
| 10455 | |
| 10456 | save_in = input_line_pointer; |
| 10457 | input_line_pointer = str; |
| 10458 | expression (ep); |
| 10459 | expr_end = input_line_pointer; |
| 10460 | input_line_pointer = save_in; |
| 10461 | |
| 10462 | /* If we are in mips16 mode, and this is an expression based on `.', |
| 10463 | then we bump the value of the symbol by 1 since that is how other |
| 10464 | text symbols are handled. We don't bother to handle complex |
| 10465 | expressions, just `.' plus or minus a constant. */ |
| 10466 | if (mips_opts.mips16 |
| 10467 | && ep->X_op == O_symbol |
| 10468 | && strcmp (S_GET_NAME (ep->X_add_symbol), FAKE_LABEL_NAME) == 0 |
| 10469 | && S_GET_SEGMENT (ep->X_add_symbol) == now_seg |
| 10470 | && symbol_get_frag (ep->X_add_symbol) == frag_now |
| 10471 | && symbol_constant_p (ep->X_add_symbol) |
| 10472 | && (val = S_GET_VALUE (ep->X_add_symbol)) == frag_now_fix ()) |
| 10473 | S_SET_VALUE (ep->X_add_symbol, val + 1); |
| 10474 | } |
| 10475 | |
| 10476 | /* Turn a string in input_line_pointer into a floating point constant |
| 10477 | of type TYPE, and store the appropriate bytes in *LITP. The number |
| 10478 | of LITTLENUMS emitted is stored in *SIZEP. An error message is |
| 10479 | returned, or NULL on OK. */ |
| 10480 | |
| 10481 | char * |
| 10482 | md_atof (int type, char *litP, int *sizeP) |
| 10483 | { |
| 10484 | int prec; |
| 10485 | LITTLENUM_TYPE words[4]; |
| 10486 | char *t; |
| 10487 | int i; |
| 10488 | |
| 10489 | switch (type) |
| 10490 | { |
| 10491 | case 'f': |
| 10492 | prec = 2; |
| 10493 | break; |
| 10494 | |
| 10495 | case 'd': |
| 10496 | prec = 4; |
| 10497 | break; |
| 10498 | |
| 10499 | default: |
| 10500 | *sizeP = 0; |
| 10501 | return _("bad call to md_atof"); |
| 10502 | } |
| 10503 | |
| 10504 | t = atof_ieee (input_line_pointer, type, words); |
| 10505 | if (t) |
| 10506 | input_line_pointer = t; |
| 10507 | |
| 10508 | *sizeP = prec * 2; |
| 10509 | |
| 10510 | if (! target_big_endian) |
| 10511 | { |
| 10512 | for (i = prec - 1; i >= 0; i--) |
| 10513 | { |
| 10514 | md_number_to_chars (litP, words[i], 2); |
| 10515 | litP += 2; |
| 10516 | } |
| 10517 | } |
| 10518 | else |
| 10519 | { |
| 10520 | for (i = 0; i < prec; i++) |
| 10521 | { |
| 10522 | md_number_to_chars (litP, words[i], 2); |
| 10523 | litP += 2; |
| 10524 | } |
| 10525 | } |
| 10526 | |
| 10527 | return NULL; |
| 10528 | } |
| 10529 | |
| 10530 | void |
| 10531 | md_number_to_chars (char *buf, valueT val, int n) |
| 10532 | { |
| 10533 | if (target_big_endian) |
| 10534 | number_to_chars_bigendian (buf, val, n); |
| 10535 | else |
| 10536 | number_to_chars_littleendian (buf, val, n); |
| 10537 | } |
| 10538 | \f |
| 10539 | #ifdef OBJ_ELF |
| 10540 | static int support_64bit_objects(void) |
| 10541 | { |
| 10542 | const char **list, **l; |
| 10543 | int yes; |
| 10544 | |
| 10545 | list = bfd_target_list (); |
| 10546 | for (l = list; *l != NULL; l++) |
| 10547 | #ifdef TE_TMIPS |
| 10548 | /* This is traditional mips */ |
| 10549 | if (strcmp (*l, "elf64-tradbigmips") == 0 |
| 10550 | || strcmp (*l, "elf64-tradlittlemips") == 0) |
| 10551 | #else |
| 10552 | if (strcmp (*l, "elf64-bigmips") == 0 |
| 10553 | || strcmp (*l, "elf64-littlemips") == 0) |
| 10554 | #endif |
| 10555 | break; |
| 10556 | yes = (*l != NULL); |
| 10557 | free (list); |
| 10558 | return yes; |
| 10559 | } |
| 10560 | #endif /* OBJ_ELF */ |
| 10561 | |
| 10562 | const char *md_shortopts = "O::g::G:"; |
| 10563 | |
| 10564 | struct option md_longopts[] = |
| 10565 | { |
| 10566 | /* Options which specify architecture. */ |
| 10567 | #define OPTION_ARCH_BASE (OPTION_MD_BASE) |
| 10568 | #define OPTION_MARCH (OPTION_ARCH_BASE + 0) |
| 10569 | {"march", required_argument, NULL, OPTION_MARCH}, |
| 10570 | #define OPTION_MTUNE (OPTION_ARCH_BASE + 1) |
| 10571 | {"mtune", required_argument, NULL, OPTION_MTUNE}, |
| 10572 | #define OPTION_MIPS1 (OPTION_ARCH_BASE + 2) |
| 10573 | {"mips0", no_argument, NULL, OPTION_MIPS1}, |
| 10574 | {"mips1", no_argument, NULL, OPTION_MIPS1}, |
| 10575 | #define OPTION_MIPS2 (OPTION_ARCH_BASE + 3) |
| 10576 | {"mips2", no_argument, NULL, OPTION_MIPS2}, |
| 10577 | #define OPTION_MIPS3 (OPTION_ARCH_BASE + 4) |
| 10578 | {"mips3", no_argument, NULL, OPTION_MIPS3}, |
| 10579 | #define OPTION_MIPS4 (OPTION_ARCH_BASE + 5) |
| 10580 | {"mips4", no_argument, NULL, OPTION_MIPS4}, |
| 10581 | #define OPTION_MIPS5 (OPTION_ARCH_BASE + 6) |
| 10582 | {"mips5", no_argument, NULL, OPTION_MIPS5}, |
| 10583 | #define OPTION_MIPS32 (OPTION_ARCH_BASE + 7) |
| 10584 | {"mips32", no_argument, NULL, OPTION_MIPS32}, |
| 10585 | #define OPTION_MIPS64 (OPTION_ARCH_BASE + 8) |
| 10586 | {"mips64", no_argument, NULL, OPTION_MIPS64}, |
| 10587 | #define OPTION_MIPS32R2 (OPTION_ARCH_BASE + 9) |
| 10588 | {"mips32r2", no_argument, NULL, OPTION_MIPS32R2}, |
| 10589 | #define OPTION_MIPS64R2 (OPTION_ARCH_BASE + 10) |
| 10590 | {"mips64r2", no_argument, NULL, OPTION_MIPS64R2}, |
| 10591 | |
| 10592 | /* Options which specify Application Specific Extensions (ASEs). */ |
| 10593 | #define OPTION_ASE_BASE (OPTION_ARCH_BASE + 11) |
| 10594 | #define OPTION_MIPS16 (OPTION_ASE_BASE + 0) |
| 10595 | {"mips16", no_argument, NULL, OPTION_MIPS16}, |
| 10596 | #define OPTION_NO_MIPS16 (OPTION_ASE_BASE + 1) |
| 10597 | {"no-mips16", no_argument, NULL, OPTION_NO_MIPS16}, |
| 10598 | #define OPTION_MIPS3D (OPTION_ASE_BASE + 2) |
| 10599 | {"mips3d", no_argument, NULL, OPTION_MIPS3D}, |
| 10600 | #define OPTION_NO_MIPS3D (OPTION_ASE_BASE + 3) |
| 10601 | {"no-mips3d", no_argument, NULL, OPTION_NO_MIPS3D}, |
| 10602 | #define OPTION_MDMX (OPTION_ASE_BASE + 4) |
| 10603 | {"mdmx", no_argument, NULL, OPTION_MDMX}, |
| 10604 | #define OPTION_NO_MDMX (OPTION_ASE_BASE + 5) |
| 10605 | {"no-mdmx", no_argument, NULL, OPTION_NO_MDMX}, |
| 10606 | #define OPTION_DSP (OPTION_ASE_BASE + 6) |
| 10607 | {"mdsp", no_argument, NULL, OPTION_DSP}, |
| 10608 | #define OPTION_NO_DSP (OPTION_ASE_BASE + 7) |
| 10609 | {"mno-dsp", no_argument, NULL, OPTION_NO_DSP}, |
| 10610 | #define OPTION_MT (OPTION_ASE_BASE + 8) |
| 10611 | {"mmt", no_argument, NULL, OPTION_MT}, |
| 10612 | #define OPTION_NO_MT (OPTION_ASE_BASE + 9) |
| 10613 | {"mno-mt", no_argument, NULL, OPTION_NO_MT}, |
| 10614 | |
| 10615 | /* Old-style architecture options. Don't add more of these. */ |
| 10616 | #define OPTION_COMPAT_ARCH_BASE (OPTION_ASE_BASE + 10) |
| 10617 | #define OPTION_M4650 (OPTION_COMPAT_ARCH_BASE + 0) |
| 10618 | {"m4650", no_argument, NULL, OPTION_M4650}, |
| 10619 | #define OPTION_NO_M4650 (OPTION_COMPAT_ARCH_BASE + 1) |
| 10620 | {"no-m4650", no_argument, NULL, OPTION_NO_M4650}, |
| 10621 | #define OPTION_M4010 (OPTION_COMPAT_ARCH_BASE + 2) |
| 10622 | {"m4010", no_argument, NULL, OPTION_M4010}, |
| 10623 | #define OPTION_NO_M4010 (OPTION_COMPAT_ARCH_BASE + 3) |
| 10624 | {"no-m4010", no_argument, NULL, OPTION_NO_M4010}, |
| 10625 | #define OPTION_M4100 (OPTION_COMPAT_ARCH_BASE + 4) |
| 10626 | {"m4100", no_argument, NULL, OPTION_M4100}, |
| 10627 | #define OPTION_NO_M4100 (OPTION_COMPAT_ARCH_BASE + 5) |
| 10628 | {"no-m4100", no_argument, NULL, OPTION_NO_M4100}, |
| 10629 | #define OPTION_M3900 (OPTION_COMPAT_ARCH_BASE + 6) |
| 10630 | {"m3900", no_argument, NULL, OPTION_M3900}, |
| 10631 | #define OPTION_NO_M3900 (OPTION_COMPAT_ARCH_BASE + 7) |
| 10632 | {"no-m3900", no_argument, NULL, OPTION_NO_M3900}, |
| 10633 | |
| 10634 | /* Options which enable bug fixes. */ |
| 10635 | #define OPTION_FIX_BASE (OPTION_COMPAT_ARCH_BASE + 8) |
| 10636 | #define OPTION_M7000_HILO_FIX (OPTION_FIX_BASE + 0) |
| 10637 | {"mfix7000", no_argument, NULL, OPTION_M7000_HILO_FIX}, |
| 10638 | #define OPTION_MNO_7000_HILO_FIX (OPTION_FIX_BASE + 1) |
| 10639 | {"no-fix-7000", no_argument, NULL, OPTION_MNO_7000_HILO_FIX}, |
| 10640 | {"mno-fix7000", no_argument, NULL, OPTION_MNO_7000_HILO_FIX}, |
| 10641 | #define OPTION_FIX_VR4120 (OPTION_FIX_BASE + 2) |
| 10642 | #define OPTION_NO_FIX_VR4120 (OPTION_FIX_BASE + 3) |
| 10643 | {"mfix-vr4120", no_argument, NULL, OPTION_FIX_VR4120}, |
| 10644 | {"mno-fix-vr4120", no_argument, NULL, OPTION_NO_FIX_VR4120}, |
| 10645 | #define OPTION_FIX_VR4130 (OPTION_FIX_BASE + 4) |
| 10646 | #define OPTION_NO_FIX_VR4130 (OPTION_FIX_BASE + 5) |
| 10647 | {"mfix-vr4130", no_argument, NULL, OPTION_FIX_VR4130}, |
| 10648 | {"mno-fix-vr4130", no_argument, NULL, OPTION_NO_FIX_VR4130}, |
| 10649 | |
| 10650 | /* Miscellaneous options. */ |
| 10651 | #define OPTION_MISC_BASE (OPTION_FIX_BASE + 6) |
| 10652 | #define OPTION_TRAP (OPTION_MISC_BASE + 0) |
| 10653 | {"trap", no_argument, NULL, OPTION_TRAP}, |
| 10654 | {"no-break", no_argument, NULL, OPTION_TRAP}, |
| 10655 | #define OPTION_BREAK (OPTION_MISC_BASE + 1) |
| 10656 | {"break", no_argument, NULL, OPTION_BREAK}, |
| 10657 | {"no-trap", no_argument, NULL, OPTION_BREAK}, |
| 10658 | #define OPTION_EB (OPTION_MISC_BASE + 2) |
| 10659 | {"EB", no_argument, NULL, OPTION_EB}, |
| 10660 | #define OPTION_EL (OPTION_MISC_BASE + 3) |
| 10661 | {"EL", no_argument, NULL, OPTION_EL}, |
| 10662 | #define OPTION_FP32 (OPTION_MISC_BASE + 4) |
| 10663 | {"mfp32", no_argument, NULL, OPTION_FP32}, |
| 10664 | #define OPTION_GP32 (OPTION_MISC_BASE + 5) |
| 10665 | {"mgp32", no_argument, NULL, OPTION_GP32}, |
| 10666 | #define OPTION_CONSTRUCT_FLOATS (OPTION_MISC_BASE + 6) |
| 10667 | {"construct-floats", no_argument, NULL, OPTION_CONSTRUCT_FLOATS}, |
| 10668 | #define OPTION_NO_CONSTRUCT_FLOATS (OPTION_MISC_BASE + 7) |
| 10669 | {"no-construct-floats", no_argument, NULL, OPTION_NO_CONSTRUCT_FLOATS}, |
| 10670 | #define OPTION_FP64 (OPTION_MISC_BASE + 8) |
| 10671 | {"mfp64", no_argument, NULL, OPTION_FP64}, |
| 10672 | #define OPTION_GP64 (OPTION_MISC_BASE + 9) |
| 10673 | {"mgp64", no_argument, NULL, OPTION_GP64}, |
| 10674 | #define OPTION_RELAX_BRANCH (OPTION_MISC_BASE + 10) |
| 10675 | #define OPTION_NO_RELAX_BRANCH (OPTION_MISC_BASE + 11) |
| 10676 | {"relax-branch", no_argument, NULL, OPTION_RELAX_BRANCH}, |
| 10677 | {"no-relax-branch", no_argument, NULL, OPTION_NO_RELAX_BRANCH}, |
| 10678 | #define OPTION_MSHARED (OPTION_MISC_BASE + 12) |
| 10679 | #define OPTION_MNO_SHARED (OPTION_MISC_BASE + 13) |
| 10680 | {"mshared", no_argument, NULL, OPTION_MSHARED}, |
| 10681 | {"mno-shared", no_argument, NULL, OPTION_MNO_SHARED}, |
| 10682 | #define OPTION_MSYM32 (OPTION_MISC_BASE + 14) |
| 10683 | #define OPTION_MNO_SYM32 (OPTION_MISC_BASE + 15) |
| 10684 | {"msym32", no_argument, NULL, OPTION_MSYM32}, |
| 10685 | {"mno-sym32", no_argument, NULL, OPTION_MNO_SYM32}, |
| 10686 | |
| 10687 | /* ELF-specific options. */ |
| 10688 | #ifdef OBJ_ELF |
| 10689 | #define OPTION_ELF_BASE (OPTION_MISC_BASE + 16) |
| 10690 | #define OPTION_CALL_SHARED (OPTION_ELF_BASE + 0) |
| 10691 | {"KPIC", no_argument, NULL, OPTION_CALL_SHARED}, |
| 10692 | {"call_shared", no_argument, NULL, OPTION_CALL_SHARED}, |
| 10693 | #define OPTION_NON_SHARED (OPTION_ELF_BASE + 1) |
| 10694 | {"non_shared", no_argument, NULL, OPTION_NON_SHARED}, |
| 10695 | #define OPTION_XGOT (OPTION_ELF_BASE + 2) |
| 10696 | {"xgot", no_argument, NULL, OPTION_XGOT}, |
| 10697 | #define OPTION_MABI (OPTION_ELF_BASE + 3) |
| 10698 | {"mabi", required_argument, NULL, OPTION_MABI}, |
| 10699 | #define OPTION_32 (OPTION_ELF_BASE + 4) |
| 10700 | {"32", no_argument, NULL, OPTION_32}, |
| 10701 | #define OPTION_N32 (OPTION_ELF_BASE + 5) |
| 10702 | {"n32", no_argument, NULL, OPTION_N32}, |
| 10703 | #define OPTION_64 (OPTION_ELF_BASE + 6) |
| 10704 | {"64", no_argument, NULL, OPTION_64}, |
| 10705 | #define OPTION_MDEBUG (OPTION_ELF_BASE + 7) |
| 10706 | {"mdebug", no_argument, NULL, OPTION_MDEBUG}, |
| 10707 | #define OPTION_NO_MDEBUG (OPTION_ELF_BASE + 8) |
| 10708 | {"no-mdebug", no_argument, NULL, OPTION_NO_MDEBUG}, |
| 10709 | #define OPTION_PDR (OPTION_ELF_BASE + 9) |
| 10710 | {"mpdr", no_argument, NULL, OPTION_PDR}, |
| 10711 | #define OPTION_NO_PDR (OPTION_ELF_BASE + 10) |
| 10712 | {"mno-pdr", no_argument, NULL, OPTION_NO_PDR}, |
| 10713 | #define OPTION_MVXWORKS_PIC (OPTION_ELF_BASE + 11) |
| 10714 | {"mvxworks-pic", no_argument, NULL, OPTION_MVXWORKS_PIC}, |
| 10715 | #endif /* OBJ_ELF */ |
| 10716 | |
| 10717 | {NULL, no_argument, NULL, 0} |
| 10718 | }; |
| 10719 | size_t md_longopts_size = sizeof (md_longopts); |
| 10720 | |
| 10721 | /* Set STRING_PTR (either &mips_arch_string or &mips_tune_string) to |
| 10722 | NEW_VALUE. Warn if another value was already specified. Note: |
| 10723 | we have to defer parsing the -march and -mtune arguments in order |
| 10724 | to handle 'from-abi' correctly, since the ABI might be specified |
| 10725 | in a later argument. */ |
| 10726 | |
| 10727 | static void |
| 10728 | mips_set_option_string (const char **string_ptr, const char *new_value) |
| 10729 | { |
| 10730 | if (*string_ptr != 0 && strcasecmp (*string_ptr, new_value) != 0) |
| 10731 | as_warn (_("A different %s was already specified, is now %s"), |
| 10732 | string_ptr == &mips_arch_string ? "-march" : "-mtune", |
| 10733 | new_value); |
| 10734 | |
| 10735 | *string_ptr = new_value; |
| 10736 | } |
| 10737 | |
| 10738 | int |
| 10739 | md_parse_option (int c, char *arg) |
| 10740 | { |
| 10741 | switch (c) |
| 10742 | { |
| 10743 | case OPTION_CONSTRUCT_FLOATS: |
| 10744 | mips_disable_float_construction = 0; |
| 10745 | break; |
| 10746 | |
| 10747 | case OPTION_NO_CONSTRUCT_FLOATS: |
| 10748 | mips_disable_float_construction = 1; |
| 10749 | break; |
| 10750 | |
| 10751 | case OPTION_TRAP: |
| 10752 | mips_trap = 1; |
| 10753 | break; |
| 10754 | |
| 10755 | case OPTION_BREAK: |
| 10756 | mips_trap = 0; |
| 10757 | break; |
| 10758 | |
| 10759 | case OPTION_EB: |
| 10760 | target_big_endian = 1; |
| 10761 | break; |
| 10762 | |
| 10763 | case OPTION_EL: |
| 10764 | target_big_endian = 0; |
| 10765 | break; |
| 10766 | |
| 10767 | case 'O': |
| 10768 | if (arg && arg[1] == '0') |
| 10769 | mips_optimize = 1; |
| 10770 | else |
| 10771 | mips_optimize = 2; |
| 10772 | break; |
| 10773 | |
| 10774 | case 'g': |
| 10775 | if (arg == NULL) |
| 10776 | mips_debug = 2; |
| 10777 | else |
| 10778 | mips_debug = atoi (arg); |
| 10779 | /* When the MIPS assembler sees -g or -g2, it does not do |
| 10780 | optimizations which limit full symbolic debugging. We take |
| 10781 | that to be equivalent to -O0. */ |
| 10782 | if (mips_debug == 2) |
| 10783 | mips_optimize = 1; |
| 10784 | break; |
| 10785 | |
| 10786 | case OPTION_MIPS1: |
| 10787 | file_mips_isa = ISA_MIPS1; |
| 10788 | break; |
| 10789 | |
| 10790 | case OPTION_MIPS2: |
| 10791 | file_mips_isa = ISA_MIPS2; |
| 10792 | break; |
| 10793 | |
| 10794 | case OPTION_MIPS3: |
| 10795 | file_mips_isa = ISA_MIPS3; |
| 10796 | break; |
| 10797 | |
| 10798 | case OPTION_MIPS4: |
| 10799 | file_mips_isa = ISA_MIPS4; |
| 10800 | break; |
| 10801 | |
| 10802 | case OPTION_MIPS5: |
| 10803 | file_mips_isa = ISA_MIPS5; |
| 10804 | break; |
| 10805 | |
| 10806 | case OPTION_MIPS32: |
| 10807 | file_mips_isa = ISA_MIPS32; |
| 10808 | break; |
| 10809 | |
| 10810 | case OPTION_MIPS32R2: |
| 10811 | file_mips_isa = ISA_MIPS32R2; |
| 10812 | break; |
| 10813 | |
| 10814 | case OPTION_MIPS64R2: |
| 10815 | file_mips_isa = ISA_MIPS64R2; |
| 10816 | break; |
| 10817 | |
| 10818 | case OPTION_MIPS64: |
| 10819 | file_mips_isa = ISA_MIPS64; |
| 10820 | break; |
| 10821 | |
| 10822 | case OPTION_MTUNE: |
| 10823 | mips_set_option_string (&mips_tune_string, arg); |
| 10824 | break; |
| 10825 | |
| 10826 | case OPTION_MARCH: |
| 10827 | mips_set_option_string (&mips_arch_string, arg); |
| 10828 | break; |
| 10829 | |
| 10830 | case OPTION_M4650: |
| 10831 | mips_set_option_string (&mips_arch_string, "4650"); |
| 10832 | mips_set_option_string (&mips_tune_string, "4650"); |
| 10833 | break; |
| 10834 | |
| 10835 | case OPTION_NO_M4650: |
| 10836 | break; |
| 10837 | |
| 10838 | case OPTION_M4010: |
| 10839 | mips_set_option_string (&mips_arch_string, "4010"); |
| 10840 | mips_set_option_string (&mips_tune_string, "4010"); |
| 10841 | break; |
| 10842 | |
| 10843 | case OPTION_NO_M4010: |
| 10844 | break; |
| 10845 | |
| 10846 | case OPTION_M4100: |
| 10847 | mips_set_option_string (&mips_arch_string, "4100"); |
| 10848 | mips_set_option_string (&mips_tune_string, "4100"); |
| 10849 | break; |
| 10850 | |
| 10851 | case OPTION_NO_M4100: |
| 10852 | break; |
| 10853 | |
| 10854 | case OPTION_M3900: |
| 10855 | mips_set_option_string (&mips_arch_string, "3900"); |
| 10856 | mips_set_option_string (&mips_tune_string, "3900"); |
| 10857 | break; |
| 10858 | |
| 10859 | case OPTION_NO_M3900: |
| 10860 | break; |
| 10861 | |
| 10862 | case OPTION_MDMX: |
| 10863 | mips_opts.ase_mdmx = 1; |
| 10864 | break; |
| 10865 | |
| 10866 | case OPTION_NO_MDMX: |
| 10867 | mips_opts.ase_mdmx = 0; |
| 10868 | break; |
| 10869 | |
| 10870 | case OPTION_DSP: |
| 10871 | mips_opts.ase_dsp = 1; |
| 10872 | break; |
| 10873 | |
| 10874 | case OPTION_NO_DSP: |
| 10875 | mips_opts.ase_dsp = 0; |
| 10876 | break; |
| 10877 | |
| 10878 | case OPTION_MT: |
| 10879 | mips_opts.ase_mt = 1; |
| 10880 | break; |
| 10881 | |
| 10882 | case OPTION_NO_MT: |
| 10883 | mips_opts.ase_mt = 0; |
| 10884 | break; |
| 10885 | |
| 10886 | case OPTION_MIPS16: |
| 10887 | mips_opts.mips16 = 1; |
| 10888 | mips_no_prev_insn (); |
| 10889 | break; |
| 10890 | |
| 10891 | case OPTION_NO_MIPS16: |
| 10892 | mips_opts.mips16 = 0; |
| 10893 | mips_no_prev_insn (); |
| 10894 | break; |
| 10895 | |
| 10896 | case OPTION_MIPS3D: |
| 10897 | mips_opts.ase_mips3d = 1; |
| 10898 | break; |
| 10899 | |
| 10900 | case OPTION_NO_MIPS3D: |
| 10901 | mips_opts.ase_mips3d = 0; |
| 10902 | break; |
| 10903 | |
| 10904 | case OPTION_FIX_VR4120: |
| 10905 | mips_fix_vr4120 = 1; |
| 10906 | break; |
| 10907 | |
| 10908 | case OPTION_NO_FIX_VR4120: |
| 10909 | mips_fix_vr4120 = 0; |
| 10910 | break; |
| 10911 | |
| 10912 | case OPTION_FIX_VR4130: |
| 10913 | mips_fix_vr4130 = 1; |
| 10914 | break; |
| 10915 | |
| 10916 | case OPTION_NO_FIX_VR4130: |
| 10917 | mips_fix_vr4130 = 0; |
| 10918 | break; |
| 10919 | |
| 10920 | case OPTION_RELAX_BRANCH: |
| 10921 | mips_relax_branch = 1; |
| 10922 | break; |
| 10923 | |
| 10924 | case OPTION_NO_RELAX_BRANCH: |
| 10925 | mips_relax_branch = 0; |
| 10926 | break; |
| 10927 | |
| 10928 | case OPTION_MSHARED: |
| 10929 | mips_in_shared = TRUE; |
| 10930 | break; |
| 10931 | |
| 10932 | case OPTION_MNO_SHARED: |
| 10933 | mips_in_shared = FALSE; |
| 10934 | break; |
| 10935 | |
| 10936 | case OPTION_MSYM32: |
| 10937 | mips_opts.sym32 = TRUE; |
| 10938 | break; |
| 10939 | |
| 10940 | case OPTION_MNO_SYM32: |
| 10941 | mips_opts.sym32 = FALSE; |
| 10942 | break; |
| 10943 | |
| 10944 | #ifdef OBJ_ELF |
| 10945 | /* When generating ELF code, we permit -KPIC and -call_shared to |
| 10946 | select SVR4_PIC, and -non_shared to select no PIC. This is |
| 10947 | intended to be compatible with Irix 5. */ |
| 10948 | case OPTION_CALL_SHARED: |
| 10949 | if (OUTPUT_FLAVOR != bfd_target_elf_flavour) |
| 10950 | { |
| 10951 | as_bad (_("-call_shared is supported only for ELF format")); |
| 10952 | return 0; |
| 10953 | } |
| 10954 | mips_pic = SVR4_PIC; |
| 10955 | mips_abicalls = TRUE; |
| 10956 | break; |
| 10957 | |
| 10958 | case OPTION_NON_SHARED: |
| 10959 | if (OUTPUT_FLAVOR != bfd_target_elf_flavour) |
| 10960 | { |
| 10961 | as_bad (_("-non_shared is supported only for ELF format")); |
| 10962 | return 0; |
| 10963 | } |
| 10964 | mips_pic = NO_PIC; |
| 10965 | mips_abicalls = FALSE; |
| 10966 | break; |
| 10967 | |
| 10968 | /* The -xgot option tells the assembler to use 32 bit offsets |
| 10969 | when accessing the got in SVR4_PIC mode. It is for Irix |
| 10970 | compatibility. */ |
| 10971 | case OPTION_XGOT: |
| 10972 | mips_big_got = 1; |
| 10973 | break; |
| 10974 | #endif /* OBJ_ELF */ |
| 10975 | |
| 10976 | case 'G': |
| 10977 | g_switch_value = atoi (arg); |
| 10978 | g_switch_seen = 1; |
| 10979 | break; |
| 10980 | |
| 10981 | #ifdef OBJ_ELF |
| 10982 | /* The -32, -n32 and -64 options are shortcuts for -mabi=32, -mabi=n32 |
| 10983 | and -mabi=64. */ |
| 10984 | case OPTION_32: |
| 10985 | if (OUTPUT_FLAVOR != bfd_target_elf_flavour) |
| 10986 | { |
| 10987 | as_bad (_("-32 is supported for ELF format only")); |
| 10988 | return 0; |
| 10989 | } |
| 10990 | mips_abi = O32_ABI; |
| 10991 | break; |
| 10992 | |
| 10993 | case OPTION_N32: |
| 10994 | if (OUTPUT_FLAVOR != bfd_target_elf_flavour) |
| 10995 | { |
| 10996 | as_bad (_("-n32 is supported for ELF format only")); |
| 10997 | return 0; |
| 10998 | } |
| 10999 | mips_abi = N32_ABI; |
| 11000 | break; |
| 11001 | |
| 11002 | case OPTION_64: |
| 11003 | if (OUTPUT_FLAVOR != bfd_target_elf_flavour) |
| 11004 | { |
| 11005 | as_bad (_("-64 is supported for ELF format only")); |
| 11006 | return 0; |
| 11007 | } |
| 11008 | mips_abi = N64_ABI; |
| 11009 | if (! support_64bit_objects()) |
| 11010 | as_fatal (_("No compiled in support for 64 bit object file format")); |
| 11011 | break; |
| 11012 | #endif /* OBJ_ELF */ |
| 11013 | |
| 11014 | case OPTION_GP32: |
| 11015 | file_mips_gp32 = 1; |
| 11016 | break; |
| 11017 | |
| 11018 | case OPTION_GP64: |
| 11019 | file_mips_gp32 = 0; |
| 11020 | break; |
| 11021 | |
| 11022 | case OPTION_FP32: |
| 11023 | file_mips_fp32 = 1; |
| 11024 | break; |
| 11025 | |
| 11026 | case OPTION_FP64: |
| 11027 | file_mips_fp32 = 0; |
| 11028 | break; |
| 11029 | |
| 11030 | #ifdef OBJ_ELF |
| 11031 | case OPTION_MABI: |
| 11032 | if (OUTPUT_FLAVOR != bfd_target_elf_flavour) |
| 11033 | { |
| 11034 | as_bad (_("-mabi is supported for ELF format only")); |
| 11035 | return 0; |
| 11036 | } |
| 11037 | if (strcmp (arg, "32") == 0) |
| 11038 | mips_abi = O32_ABI; |
| 11039 | else if (strcmp (arg, "o64") == 0) |
| 11040 | mips_abi = O64_ABI; |
| 11041 | else if (strcmp (arg, "n32") == 0) |
| 11042 | mips_abi = N32_ABI; |
| 11043 | else if (strcmp (arg, "64") == 0) |
| 11044 | { |
| 11045 | mips_abi = N64_ABI; |
| 11046 | if (! support_64bit_objects()) |
| 11047 | as_fatal (_("No compiled in support for 64 bit object file " |
| 11048 | "format")); |
| 11049 | } |
| 11050 | else if (strcmp (arg, "eabi") == 0) |
| 11051 | mips_abi = EABI_ABI; |
| 11052 | else |
| 11053 | { |
| 11054 | as_fatal (_("invalid abi -mabi=%s"), arg); |
| 11055 | return 0; |
| 11056 | } |
| 11057 | break; |
| 11058 | #endif /* OBJ_ELF */ |
| 11059 | |
| 11060 | case OPTION_M7000_HILO_FIX: |
| 11061 | mips_7000_hilo_fix = TRUE; |
| 11062 | break; |
| 11063 | |
| 11064 | case OPTION_MNO_7000_HILO_FIX: |
| 11065 | mips_7000_hilo_fix = FALSE; |
| 11066 | break; |
| 11067 | |
| 11068 | #ifdef OBJ_ELF |
| 11069 | case OPTION_MDEBUG: |
| 11070 | mips_flag_mdebug = TRUE; |
| 11071 | break; |
| 11072 | |
| 11073 | case OPTION_NO_MDEBUG: |
| 11074 | mips_flag_mdebug = FALSE; |
| 11075 | break; |
| 11076 | |
| 11077 | case OPTION_PDR: |
| 11078 | mips_flag_pdr = TRUE; |
| 11079 | break; |
| 11080 | |
| 11081 | case OPTION_NO_PDR: |
| 11082 | mips_flag_pdr = FALSE; |
| 11083 | break; |
| 11084 | |
| 11085 | case OPTION_MVXWORKS_PIC: |
| 11086 | mips_pic = VXWORKS_PIC; |
| 11087 | break; |
| 11088 | #endif /* OBJ_ELF */ |
| 11089 | |
| 11090 | default: |
| 11091 | return 0; |
| 11092 | } |
| 11093 | |
| 11094 | return 1; |
| 11095 | } |
| 11096 | \f |
| 11097 | /* Set up globals to generate code for the ISA or processor |
| 11098 | described by INFO. */ |
| 11099 | |
| 11100 | static void |
| 11101 | mips_set_architecture (const struct mips_cpu_info *info) |
| 11102 | { |
| 11103 | if (info != 0) |
| 11104 | { |
| 11105 | file_mips_arch = info->cpu; |
| 11106 | mips_opts.arch = info->cpu; |
| 11107 | mips_opts.isa = info->isa; |
| 11108 | } |
| 11109 | } |
| 11110 | |
| 11111 | |
| 11112 | /* Likewise for tuning. */ |
| 11113 | |
| 11114 | static void |
| 11115 | mips_set_tune (const struct mips_cpu_info *info) |
| 11116 | { |
| 11117 | if (info != 0) |
| 11118 | mips_tune = info->cpu; |
| 11119 | } |
| 11120 | |
| 11121 | |
| 11122 | void |
| 11123 | mips_after_parse_args (void) |
| 11124 | { |
| 11125 | const struct mips_cpu_info *arch_info = 0; |
| 11126 | const struct mips_cpu_info *tune_info = 0; |
| 11127 | |
| 11128 | /* GP relative stuff not working for PE */ |
| 11129 | if (strncmp (TARGET_OS, "pe", 2) == 0) |
| 11130 | { |
| 11131 | if (g_switch_seen && g_switch_value != 0) |
| 11132 | as_bad (_("-G not supported in this configuration.")); |
| 11133 | g_switch_value = 0; |
| 11134 | } |
| 11135 | |
| 11136 | if (mips_abi == NO_ABI) |
| 11137 | mips_abi = MIPS_DEFAULT_ABI; |
| 11138 | |
| 11139 | /* The following code determines the architecture and register size. |
| 11140 | Similar code was added to GCC 3.3 (see override_options() in |
| 11141 | config/mips/mips.c). The GAS and GCC code should be kept in sync |
| 11142 | as much as possible. */ |
| 11143 | |
| 11144 | if (mips_arch_string != 0) |
| 11145 | arch_info = mips_parse_cpu ("-march", mips_arch_string); |
| 11146 | |
| 11147 | if (file_mips_isa != ISA_UNKNOWN) |
| 11148 | { |
| 11149 | /* Handle -mipsN. At this point, file_mips_isa contains the |
| 11150 | ISA level specified by -mipsN, while arch_info->isa contains |
| 11151 | the -march selection (if any). */ |
| 11152 | if (arch_info != 0) |
| 11153 | { |
| 11154 | /* -march takes precedence over -mipsN, since it is more descriptive. |
| 11155 | There's no harm in specifying both as long as the ISA levels |
| 11156 | are the same. */ |
| 11157 | if (file_mips_isa != arch_info->isa) |
| 11158 | as_bad (_("-%s conflicts with the other architecture options, which imply -%s"), |
| 11159 | mips_cpu_info_from_isa (file_mips_isa)->name, |
| 11160 | mips_cpu_info_from_isa (arch_info->isa)->name); |
| 11161 | } |
| 11162 | else |
| 11163 | arch_info = mips_cpu_info_from_isa (file_mips_isa); |
| 11164 | } |
| 11165 | |
| 11166 | if (arch_info == 0) |
| 11167 | arch_info = mips_parse_cpu ("default CPU", MIPS_CPU_STRING_DEFAULT); |
| 11168 | |
| 11169 | if (ABI_NEEDS_64BIT_REGS (mips_abi) && !ISA_HAS_64BIT_REGS (arch_info->isa)) |
| 11170 | as_bad ("-march=%s is not compatible with the selected ABI", |
| 11171 | arch_info->name); |
| 11172 | |
| 11173 | mips_set_architecture (arch_info); |
| 11174 | |
| 11175 | /* Optimize for file_mips_arch, unless -mtune selects a different processor. */ |
| 11176 | if (mips_tune_string != 0) |
| 11177 | tune_info = mips_parse_cpu ("-mtune", mips_tune_string); |
| 11178 | |
| 11179 | if (tune_info == 0) |
| 11180 | mips_set_tune (arch_info); |
| 11181 | else |
| 11182 | mips_set_tune (tune_info); |
| 11183 | |
| 11184 | if (file_mips_gp32 >= 0) |
| 11185 | { |
| 11186 | /* The user specified the size of the integer registers. Make sure |
| 11187 | it agrees with the ABI and ISA. */ |
| 11188 | if (file_mips_gp32 == 0 && !ISA_HAS_64BIT_REGS (mips_opts.isa)) |
| 11189 | as_bad (_("-mgp64 used with a 32-bit processor")); |
| 11190 | else if (file_mips_gp32 == 1 && ABI_NEEDS_64BIT_REGS (mips_abi)) |
| 11191 | as_bad (_("-mgp32 used with a 64-bit ABI")); |
| 11192 | else if (file_mips_gp32 == 0 && ABI_NEEDS_32BIT_REGS (mips_abi)) |
| 11193 | as_bad (_("-mgp64 used with a 32-bit ABI")); |
| 11194 | } |
| 11195 | else |
| 11196 | { |
| 11197 | /* Infer the integer register size from the ABI and processor. |
| 11198 | Restrict ourselves to 32-bit registers if that's all the |
| 11199 | processor has, or if the ABI cannot handle 64-bit registers. */ |
| 11200 | file_mips_gp32 = (ABI_NEEDS_32BIT_REGS (mips_abi) |
| 11201 | || !ISA_HAS_64BIT_REGS (mips_opts.isa)); |
| 11202 | } |
| 11203 | |
| 11204 | /* ??? GAS treats single-float processors as though they had 64-bit |
| 11205 | float registers (although it complains when double-precision |
| 11206 | instructions are used). As things stand, saying they have 32-bit |
| 11207 | registers would lead to spurious "register must be even" messages. |
| 11208 | So here we assume float registers are always the same size as |
| 11209 | integer ones, unless the user says otherwise. */ |
| 11210 | if (file_mips_fp32 < 0) |
| 11211 | file_mips_fp32 = file_mips_gp32; |
| 11212 | |
| 11213 | /* End of GCC-shared inference code. */ |
| 11214 | |
| 11215 | /* This flag is set when we have a 64-bit capable CPU but use only |
| 11216 | 32-bit wide registers. Note that EABI does not use it. */ |
| 11217 | if (ISA_HAS_64BIT_REGS (mips_opts.isa) |
| 11218 | && ((mips_abi == NO_ABI && file_mips_gp32 == 1) |
| 11219 | || mips_abi == O32_ABI)) |
| 11220 | mips_32bitmode = 1; |
| 11221 | |
| 11222 | if (mips_opts.isa == ISA_MIPS1 && mips_trap) |
| 11223 | as_bad (_("trap exception not supported at ISA 1")); |
| 11224 | |
| 11225 | /* If the selected architecture includes support for ASEs, enable |
| 11226 | generation of code for them. */ |
| 11227 | if (mips_opts.mips16 == -1) |
| 11228 | mips_opts.mips16 = (CPU_HAS_MIPS16 (file_mips_arch)) ? 1 : 0; |
| 11229 | if (mips_opts.ase_mips3d == -1) |
| 11230 | mips_opts.ase_mips3d = (CPU_HAS_MIPS3D (file_mips_arch)) ? 1 : 0; |
| 11231 | if (mips_opts.ase_mdmx == -1) |
| 11232 | mips_opts.ase_mdmx = (CPU_HAS_MDMX (file_mips_arch)) ? 1 : 0; |
| 11233 | if (mips_opts.ase_dsp == -1) |
| 11234 | mips_opts.ase_dsp = (CPU_HAS_DSP (file_mips_arch)) ? 1 : 0; |
| 11235 | if (mips_opts.ase_mt == -1) |
| 11236 | mips_opts.ase_mt = (CPU_HAS_MT (file_mips_arch)) ? 1 : 0; |
| 11237 | |
| 11238 | file_mips_isa = mips_opts.isa; |
| 11239 | file_ase_mips16 = mips_opts.mips16; |
| 11240 | file_ase_mips3d = mips_opts.ase_mips3d; |
| 11241 | file_ase_mdmx = mips_opts.ase_mdmx; |
| 11242 | file_ase_dsp = mips_opts.ase_dsp; |
| 11243 | file_ase_mt = mips_opts.ase_mt; |
| 11244 | mips_opts.gp32 = file_mips_gp32; |
| 11245 | mips_opts.fp32 = file_mips_fp32; |
| 11246 | |
| 11247 | if (mips_flag_mdebug < 0) |
| 11248 | { |
| 11249 | #ifdef OBJ_MAYBE_ECOFF |
| 11250 | if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour) |
| 11251 | mips_flag_mdebug = 1; |
| 11252 | else |
| 11253 | #endif /* OBJ_MAYBE_ECOFF */ |
| 11254 | mips_flag_mdebug = 0; |
| 11255 | } |
| 11256 | } |
| 11257 | \f |
| 11258 | void |
| 11259 | mips_init_after_args (void) |
| 11260 | { |
| 11261 | /* initialize opcodes */ |
| 11262 | bfd_mips_num_opcodes = bfd_mips_num_builtin_opcodes; |
| 11263 | mips_opcodes = (struct mips_opcode *) mips_builtin_opcodes; |
| 11264 | } |
| 11265 | |
| 11266 | long |
| 11267 | md_pcrel_from (fixS *fixP) |
| 11268 | { |
| 11269 | valueT addr = fixP->fx_where + fixP->fx_frag->fr_address; |
| 11270 | switch (fixP->fx_r_type) |
| 11271 | { |
| 11272 | case BFD_RELOC_16_PCREL_S2: |
| 11273 | case BFD_RELOC_MIPS_JMP: |
| 11274 | /* Return the address of the delay slot. */ |
| 11275 | return addr + 4; |
| 11276 | default: |
| 11277 | return addr; |
| 11278 | } |
| 11279 | } |
| 11280 | |
| 11281 | /* This is called before the symbol table is processed. In order to |
| 11282 | work with gcc when using mips-tfile, we must keep all local labels. |
| 11283 | However, in other cases, we want to discard them. If we were |
| 11284 | called with -g, but we didn't see any debugging information, it may |
| 11285 | mean that gcc is smuggling debugging information through to |
| 11286 | mips-tfile, in which case we must generate all local labels. */ |
| 11287 | |
| 11288 | void |
| 11289 | mips_frob_file_before_adjust (void) |
| 11290 | { |
| 11291 | #ifndef NO_ECOFF_DEBUGGING |
| 11292 | if (ECOFF_DEBUGGING |
| 11293 | && mips_debug != 0 |
| 11294 | && ! ecoff_debugging_seen) |
| 11295 | flag_keep_locals = 1; |
| 11296 | #endif |
| 11297 | } |
| 11298 | |
| 11299 | /* Sort any unmatched HI16 and GOT16 relocs so that they immediately precede |
| 11300 | the corresponding LO16 reloc. This is called before md_apply_fix and |
| 11301 | tc_gen_reloc. Unmatched relocs can only be generated by use of explicit |
| 11302 | relocation operators. |
| 11303 | |
| 11304 | For our purposes, a %lo() expression matches a %got() or %hi() |
| 11305 | expression if: |
| 11306 | |
| 11307 | (a) it refers to the same symbol; and |
| 11308 | (b) the offset applied in the %lo() expression is no lower than |
| 11309 | the offset applied in the %got() or %hi(). |
| 11310 | |
| 11311 | (b) allows us to cope with code like: |
| 11312 | |
| 11313 | lui $4,%hi(foo) |
| 11314 | lh $4,%lo(foo+2)($4) |
| 11315 | |
| 11316 | ...which is legal on RELA targets, and has a well-defined behaviour |
| 11317 | if the user knows that adding 2 to "foo" will not induce a carry to |
| 11318 | the high 16 bits. |
| 11319 | |
| 11320 | When several %lo()s match a particular %got() or %hi(), we use the |
| 11321 | following rules to distinguish them: |
| 11322 | |
| 11323 | (1) %lo()s with smaller offsets are a better match than %lo()s with |
| 11324 | higher offsets. |
| 11325 | |
| 11326 | (2) %lo()s with no matching %got() or %hi() are better than those |
| 11327 | that already have a matching %got() or %hi(). |
| 11328 | |
| 11329 | (3) later %lo()s are better than earlier %lo()s. |
| 11330 | |
| 11331 | These rules are applied in order. |
| 11332 | |
| 11333 | (1) means, among other things, that %lo()s with identical offsets are |
| 11334 | chosen if they exist. |
| 11335 | |
| 11336 | (2) means that we won't associate several high-part relocations with |
| 11337 | the same low-part relocation unless there's no alternative. Having |
| 11338 | several high parts for the same low part is a GNU extension; this rule |
| 11339 | allows careful users to avoid it. |
| 11340 | |
| 11341 | (3) is purely cosmetic. mips_hi_fixup_list is is in reverse order, |
| 11342 | with the last high-part relocation being at the front of the list. |
| 11343 | It therefore makes sense to choose the last matching low-part |
| 11344 | relocation, all other things being equal. It's also easier |
| 11345 | to code that way. */ |
| 11346 | |
| 11347 | void |
| 11348 | mips_frob_file (void) |
| 11349 | { |
| 11350 | struct mips_hi_fixup *l; |
| 11351 | |
| 11352 | for (l = mips_hi_fixup_list; l != NULL; l = l->next) |
| 11353 | { |
| 11354 | segment_info_type *seginfo; |
| 11355 | bfd_boolean matched_lo_p; |
| 11356 | fixS **hi_pos, **lo_pos, **pos; |
| 11357 | |
| 11358 | assert (reloc_needs_lo_p (l->fixp->fx_r_type)); |
| 11359 | |
| 11360 | /* If a GOT16 relocation turns out to be against a global symbol, |
| 11361 | there isn't supposed to be a matching LO. */ |
| 11362 | if (l->fixp->fx_r_type == BFD_RELOC_MIPS_GOT16 |
| 11363 | && !pic_need_relax (l->fixp->fx_addsy, l->seg)) |
| 11364 | continue; |
| 11365 | |
| 11366 | /* Check quickly whether the next fixup happens to be a matching %lo. */ |
| 11367 | if (fixup_has_matching_lo_p (l->fixp)) |
| 11368 | continue; |
| 11369 | |
| 11370 | seginfo = seg_info (l->seg); |
| 11371 | |
| 11372 | /* Set HI_POS to the position of this relocation in the chain. |
| 11373 | Set LO_POS to the position of the chosen low-part relocation. |
| 11374 | MATCHED_LO_P is true on entry to the loop if *POS is a low-part |
| 11375 | relocation that matches an immediately-preceding high-part |
| 11376 | relocation. */ |
| 11377 | hi_pos = NULL; |
| 11378 | lo_pos = NULL; |
| 11379 | matched_lo_p = FALSE; |
| 11380 | for (pos = &seginfo->fix_root; *pos != NULL; pos = &(*pos)->fx_next) |
| 11381 | { |
| 11382 | if (*pos == l->fixp) |
| 11383 | hi_pos = pos; |
| 11384 | |
| 11385 | if (((*pos)->fx_r_type == BFD_RELOC_LO16 |
| 11386 | || (*pos)->fx_r_type == BFD_RELOC_MIPS16_LO16) |
| 11387 | && (*pos)->fx_addsy == l->fixp->fx_addsy |
| 11388 | && (*pos)->fx_offset >= l->fixp->fx_offset |
| 11389 | && (lo_pos == NULL |
| 11390 | || (*pos)->fx_offset < (*lo_pos)->fx_offset |
| 11391 | || (!matched_lo_p |
| 11392 | && (*pos)->fx_offset == (*lo_pos)->fx_offset))) |
| 11393 | lo_pos = pos; |
| 11394 | |
| 11395 | matched_lo_p = (reloc_needs_lo_p ((*pos)->fx_r_type) |
| 11396 | && fixup_has_matching_lo_p (*pos)); |
| 11397 | } |
| 11398 | |
| 11399 | /* If we found a match, remove the high-part relocation from its |
| 11400 | current position and insert it before the low-part relocation. |
| 11401 | Make the offsets match so that fixup_has_matching_lo_p() |
| 11402 | will return true. |
| 11403 | |
| 11404 | We don't warn about unmatched high-part relocations since some |
| 11405 | versions of gcc have been known to emit dead "lui ...%hi(...)" |
| 11406 | instructions. */ |
| 11407 | if (lo_pos != NULL) |
| 11408 | { |
| 11409 | l->fixp->fx_offset = (*lo_pos)->fx_offset; |
| 11410 | if (l->fixp->fx_next != *lo_pos) |
| 11411 | { |
| 11412 | *hi_pos = l->fixp->fx_next; |
| 11413 | l->fixp->fx_next = *lo_pos; |
| 11414 | *lo_pos = l->fixp; |
| 11415 | } |
| 11416 | } |
| 11417 | } |
| 11418 | } |
| 11419 | |
| 11420 | /* We may have combined relocations without symbols in the N32/N64 ABI. |
| 11421 | We have to prevent gas from dropping them. */ |
| 11422 | |
| 11423 | int |
| 11424 | mips_force_relocation (fixS *fixp) |
| 11425 | { |
| 11426 | if (generic_force_reloc (fixp)) |
| 11427 | return 1; |
| 11428 | |
| 11429 | if (HAVE_NEWABI |
| 11430 | && S_GET_SEGMENT (fixp->fx_addsy) == bfd_abs_section_ptr |
| 11431 | && (fixp->fx_r_type == BFD_RELOC_MIPS_SUB |
| 11432 | || fixp->fx_r_type == BFD_RELOC_HI16_S |
| 11433 | || fixp->fx_r_type == BFD_RELOC_LO16)) |
| 11434 | return 1; |
| 11435 | |
| 11436 | return 0; |
| 11437 | } |
| 11438 | |
| 11439 | /* Apply a fixup to the object file. */ |
| 11440 | |
| 11441 | void |
| 11442 | md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED) |
| 11443 | { |
| 11444 | bfd_byte *buf; |
| 11445 | long insn; |
| 11446 | reloc_howto_type *howto; |
| 11447 | |
| 11448 | /* We ignore generic BFD relocations we don't know about. */ |
| 11449 | howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type); |
| 11450 | if (! howto) |
| 11451 | return; |
| 11452 | |
| 11453 | assert (fixP->fx_size == 4 |
| 11454 | || fixP->fx_r_type == BFD_RELOC_16 |
| 11455 | || fixP->fx_r_type == BFD_RELOC_64 |
| 11456 | || fixP->fx_r_type == BFD_RELOC_CTOR |
| 11457 | || fixP->fx_r_type == BFD_RELOC_MIPS_SUB |
| 11458 | || fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
| 11459 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY); |
| 11460 | |
| 11461 | buf = (bfd_byte *) (fixP->fx_frag->fr_literal + fixP->fx_where); |
| 11462 | |
| 11463 | assert (! fixP->fx_pcrel || fixP->fx_r_type == BFD_RELOC_16_PCREL_S2); |
| 11464 | |
| 11465 | /* Don't treat parts of a composite relocation as done. There are two |
| 11466 | reasons for this: |
| 11467 | |
| 11468 | (1) The second and third parts will be against 0 (RSS_UNDEF) but |
| 11469 | should nevertheless be emitted if the first part is. |
| 11470 | |
| 11471 | (2) In normal usage, composite relocations are never assembly-time |
| 11472 | constants. The easiest way of dealing with the pathological |
| 11473 | exceptions is to generate a relocation against STN_UNDEF and |
| 11474 | leave everything up to the linker. */ |
| 11475 | if (fixP->fx_addsy == NULL && ! fixP->fx_pcrel && fixP->fx_tcbit == 0) |
| 11476 | fixP->fx_done = 1; |
| 11477 | |
| 11478 | switch (fixP->fx_r_type) |
| 11479 | { |
| 11480 | case BFD_RELOC_MIPS_TLS_GD: |
| 11481 | case BFD_RELOC_MIPS_TLS_LDM: |
| 11482 | case BFD_RELOC_MIPS_TLS_DTPREL_HI16: |
| 11483 | case BFD_RELOC_MIPS_TLS_DTPREL_LO16: |
| 11484 | case BFD_RELOC_MIPS_TLS_GOTTPREL: |
| 11485 | case BFD_RELOC_MIPS_TLS_TPREL_HI16: |
| 11486 | case BFD_RELOC_MIPS_TLS_TPREL_LO16: |
| 11487 | S_SET_THREAD_LOCAL (fixP->fx_addsy); |
| 11488 | /* fall through */ |
| 11489 | |
| 11490 | case BFD_RELOC_MIPS_JMP: |
| 11491 | case BFD_RELOC_MIPS_SHIFT5: |
| 11492 | case BFD_RELOC_MIPS_SHIFT6: |
| 11493 | case BFD_RELOC_MIPS_GOT_DISP: |
| 11494 | case BFD_RELOC_MIPS_GOT_PAGE: |
| 11495 | case BFD_RELOC_MIPS_GOT_OFST: |
| 11496 | case BFD_RELOC_MIPS_SUB: |
| 11497 | case BFD_RELOC_MIPS_INSERT_A: |
| 11498 | case BFD_RELOC_MIPS_INSERT_B: |
| 11499 | case BFD_RELOC_MIPS_DELETE: |
| 11500 | case BFD_RELOC_MIPS_HIGHEST: |
| 11501 | case BFD_RELOC_MIPS_HIGHER: |
| 11502 | case BFD_RELOC_MIPS_SCN_DISP: |
| 11503 | case BFD_RELOC_MIPS_REL16: |
| 11504 | case BFD_RELOC_MIPS_RELGOT: |
| 11505 | case BFD_RELOC_MIPS_JALR: |
| 11506 | case BFD_RELOC_HI16: |
| 11507 | case BFD_RELOC_HI16_S: |
| 11508 | case BFD_RELOC_GPREL16: |
| 11509 | case BFD_RELOC_MIPS_LITERAL: |
| 11510 | case BFD_RELOC_MIPS_CALL16: |
| 11511 | case BFD_RELOC_MIPS_GOT16: |
| 11512 | case BFD_RELOC_GPREL32: |
| 11513 | case BFD_RELOC_MIPS_GOT_HI16: |
| 11514 | case BFD_RELOC_MIPS_GOT_LO16: |
| 11515 | case BFD_RELOC_MIPS_CALL_HI16: |
| 11516 | case BFD_RELOC_MIPS_CALL_LO16: |
| 11517 | case BFD_RELOC_MIPS16_GPREL: |
| 11518 | case BFD_RELOC_MIPS16_HI16: |
| 11519 | case BFD_RELOC_MIPS16_HI16_S: |
| 11520 | /* Nothing needed to do. The value comes from the reloc entry */ |
| 11521 | break; |
| 11522 | |
| 11523 | case BFD_RELOC_MIPS16_JMP: |
| 11524 | /* We currently always generate a reloc against a symbol, which |
| 11525 | means that we don't want an addend even if the symbol is |
| 11526 | defined. */ |
| 11527 | *valP = 0; |
| 11528 | break; |
| 11529 | |
| 11530 | case BFD_RELOC_64: |
| 11531 | /* This is handled like BFD_RELOC_32, but we output a sign |
| 11532 | extended value if we are only 32 bits. */ |
| 11533 | if (fixP->fx_done) |
| 11534 | { |
| 11535 | if (8 <= sizeof (valueT)) |
| 11536 | md_number_to_chars ((char *) buf, *valP, 8); |
| 11537 | else |
| 11538 | { |
| 11539 | valueT hiv; |
| 11540 | |
| 11541 | if ((*valP & 0x80000000) != 0) |
| 11542 | hiv = 0xffffffff; |
| 11543 | else |
| 11544 | hiv = 0; |
| 11545 | md_number_to_chars ((char *)(buf + (target_big_endian ? 4 : 0)), |
| 11546 | *valP, 4); |
| 11547 | md_number_to_chars ((char *)(buf + (target_big_endian ? 0 : 4)), |
| 11548 | hiv, 4); |
| 11549 | } |
| 11550 | } |
| 11551 | break; |
| 11552 | |
| 11553 | case BFD_RELOC_RVA: |
| 11554 | case BFD_RELOC_32: |
| 11555 | /* If we are deleting this reloc entry, we must fill in the |
| 11556 | value now. This can happen if we have a .word which is not |
| 11557 | resolved when it appears but is later defined. */ |
| 11558 | if (fixP->fx_done) |
| 11559 | md_number_to_chars ((char *) buf, *valP, 4); |
| 11560 | break; |
| 11561 | |
| 11562 | case BFD_RELOC_16: |
| 11563 | /* If we are deleting this reloc entry, we must fill in the |
| 11564 | value now. */ |
| 11565 | if (fixP->fx_done) |
| 11566 | md_number_to_chars ((char *) buf, *valP, 2); |
| 11567 | break; |
| 11568 | |
| 11569 | case BFD_RELOC_LO16: |
| 11570 | case BFD_RELOC_MIPS16_LO16: |
| 11571 | /* FIXME: Now that embedded-PIC is gone, some of this code/comment |
| 11572 | may be safe to remove, but if so it's not obvious. */ |
| 11573 | /* When handling an embedded PIC switch statement, we can wind |
| 11574 | up deleting a LO16 reloc. See the 'o' case in mips_ip. */ |
| 11575 | if (fixP->fx_done) |
| 11576 | { |
| 11577 | if (*valP + 0x8000 > 0xffff) |
| 11578 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 11579 | _("relocation overflow")); |
| 11580 | if (target_big_endian) |
| 11581 | buf += 2; |
| 11582 | md_number_to_chars ((char *) buf, *valP, 2); |
| 11583 | } |
| 11584 | break; |
| 11585 | |
| 11586 | case BFD_RELOC_16_PCREL_S2: |
| 11587 | if ((*valP & 0x3) != 0) |
| 11588 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 11589 | _("Branch to misaligned address (%lx)"), (long) *valP); |
| 11590 | |
| 11591 | /* |
| 11592 | * We need to save the bits in the instruction since fixup_segment() |
| 11593 | * might be deleting the relocation entry (i.e., a branch within |
| 11594 | * the current segment). |
| 11595 | */ |
| 11596 | if (! fixP->fx_done) |
| 11597 | break; |
| 11598 | |
| 11599 | /* update old instruction data */ |
| 11600 | if (target_big_endian) |
| 11601 | insn = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; |
| 11602 | else |
| 11603 | insn = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; |
| 11604 | |
| 11605 | if (*valP + 0x20000 <= 0x3ffff) |
| 11606 | { |
| 11607 | insn |= (*valP >> 2) & 0xffff; |
| 11608 | md_number_to_chars ((char *) buf, insn, 4); |
| 11609 | } |
| 11610 | else if (mips_pic == NO_PIC |
| 11611 | && fixP->fx_done |
| 11612 | && fixP->fx_frag->fr_address >= text_section->vma |
| 11613 | && (fixP->fx_frag->fr_address |
| 11614 | < text_section->vma + bfd_get_section_size (text_section)) |
| 11615 | && ((insn & 0xffff0000) == 0x10000000 /* beq $0,$0 */ |
| 11616 | || (insn & 0xffff0000) == 0x04010000 /* bgez $0 */ |
| 11617 | || (insn & 0xffff0000) == 0x04110000)) /* bgezal $0 */ |
| 11618 | { |
| 11619 | /* The branch offset is too large. If this is an |
| 11620 | unconditional branch, and we are not generating PIC code, |
| 11621 | we can convert it to an absolute jump instruction. */ |
| 11622 | if ((insn & 0xffff0000) == 0x04110000) /* bgezal $0 */ |
| 11623 | insn = 0x0c000000; /* jal */ |
| 11624 | else |
| 11625 | insn = 0x08000000; /* j */ |
| 11626 | fixP->fx_r_type = BFD_RELOC_MIPS_JMP; |
| 11627 | fixP->fx_done = 0; |
| 11628 | fixP->fx_addsy = section_symbol (text_section); |
| 11629 | *valP += md_pcrel_from (fixP); |
| 11630 | md_number_to_chars ((char *) buf, insn, 4); |
| 11631 | } |
| 11632 | else |
| 11633 | { |
| 11634 | /* If we got here, we have branch-relaxation disabled, |
| 11635 | and there's nothing we can do to fix this instruction |
| 11636 | without turning it into a longer sequence. */ |
| 11637 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 11638 | _("Branch out of range")); |
| 11639 | } |
| 11640 | break; |
| 11641 | |
| 11642 | case BFD_RELOC_VTABLE_INHERIT: |
| 11643 | fixP->fx_done = 0; |
| 11644 | if (fixP->fx_addsy |
| 11645 | && !S_IS_DEFINED (fixP->fx_addsy) |
| 11646 | && !S_IS_WEAK (fixP->fx_addsy)) |
| 11647 | S_SET_WEAK (fixP->fx_addsy); |
| 11648 | break; |
| 11649 | |
| 11650 | case BFD_RELOC_VTABLE_ENTRY: |
| 11651 | fixP->fx_done = 0; |
| 11652 | break; |
| 11653 | |
| 11654 | default: |
| 11655 | internalError (); |
| 11656 | } |
| 11657 | |
| 11658 | /* Remember value for tc_gen_reloc. */ |
| 11659 | fixP->fx_addnumber = *valP; |
| 11660 | } |
| 11661 | |
| 11662 | static symbolS * |
| 11663 | get_symbol (void) |
| 11664 | { |
| 11665 | int c; |
| 11666 | char *name; |
| 11667 | symbolS *p; |
| 11668 | |
| 11669 | name = input_line_pointer; |
| 11670 | c = get_symbol_end (); |
| 11671 | p = (symbolS *) symbol_find_or_make (name); |
| 11672 | *input_line_pointer = c; |
| 11673 | return p; |
| 11674 | } |
| 11675 | |
| 11676 | /* Align the current frag to a given power of two. The MIPS assembler |
| 11677 | also automatically adjusts any preceding label. */ |
| 11678 | |
| 11679 | static void |
| 11680 | mips_align (int to, int fill, symbolS *label) |
| 11681 | { |
| 11682 | mips_emit_delays (); |
| 11683 | frag_align (to, fill, 0); |
| 11684 | record_alignment (now_seg, to); |
| 11685 | if (label != NULL) |
| 11686 | { |
| 11687 | assert (S_GET_SEGMENT (label) == now_seg); |
| 11688 | symbol_set_frag (label, frag_now); |
| 11689 | S_SET_VALUE (label, (valueT) frag_now_fix ()); |
| 11690 | } |
| 11691 | } |
| 11692 | |
| 11693 | /* Align to a given power of two. .align 0 turns off the automatic |
| 11694 | alignment used by the data creating pseudo-ops. */ |
| 11695 | |
| 11696 | static void |
| 11697 | s_align (int x ATTRIBUTE_UNUSED) |
| 11698 | { |
| 11699 | register int temp; |
| 11700 | register long temp_fill; |
| 11701 | long max_alignment = 15; |
| 11702 | |
| 11703 | /* |
| 11704 | |
| 11705 | o Note that the assembler pulls down any immediately preceding label |
| 11706 | to the aligned address. |
| 11707 | o It's not documented but auto alignment is reinstated by |
| 11708 | a .align pseudo instruction. |
| 11709 | o Note also that after auto alignment is turned off the mips assembler |
| 11710 | issues an error on attempt to assemble an improperly aligned data item. |
| 11711 | We don't. |
| 11712 | |
| 11713 | */ |
| 11714 | |
| 11715 | temp = get_absolute_expression (); |
| 11716 | if (temp > max_alignment) |
| 11717 | as_bad (_("Alignment too large: %d. assumed."), temp = max_alignment); |
| 11718 | else if (temp < 0) |
| 11719 | { |
| 11720 | as_warn (_("Alignment negative: 0 assumed.")); |
| 11721 | temp = 0; |
| 11722 | } |
| 11723 | if (*input_line_pointer == ',') |
| 11724 | { |
| 11725 | ++input_line_pointer; |
| 11726 | temp_fill = get_absolute_expression (); |
| 11727 | } |
| 11728 | else |
| 11729 | temp_fill = 0; |
| 11730 | if (temp) |
| 11731 | { |
| 11732 | auto_align = 1; |
| 11733 | mips_align (temp, (int) temp_fill, |
| 11734 | insn_labels != NULL ? insn_labels->label : NULL); |
| 11735 | } |
| 11736 | else |
| 11737 | { |
| 11738 | auto_align = 0; |
| 11739 | } |
| 11740 | |
| 11741 | demand_empty_rest_of_line (); |
| 11742 | } |
| 11743 | |
| 11744 | static void |
| 11745 | s_change_sec (int sec) |
| 11746 | { |
| 11747 | segT seg; |
| 11748 | |
| 11749 | #ifdef OBJ_ELF |
| 11750 | /* The ELF backend needs to know that we are changing sections, so |
| 11751 | that .previous works correctly. We could do something like check |
| 11752 | for an obj_section_change_hook macro, but that might be confusing |
| 11753 | as it would not be appropriate to use it in the section changing |
| 11754 | functions in read.c, since obj-elf.c intercepts those. FIXME: |
| 11755 | This should be cleaner, somehow. */ |
| 11756 | obj_elf_section_change_hook (); |
| 11757 | #endif |
| 11758 | |
| 11759 | mips_emit_delays (); |
| 11760 | switch (sec) |
| 11761 | { |
| 11762 | case 't': |
| 11763 | s_text (0); |
| 11764 | break; |
| 11765 | case 'd': |
| 11766 | s_data (0); |
| 11767 | break; |
| 11768 | case 'b': |
| 11769 | subseg_set (bss_section, (subsegT) get_absolute_expression ()); |
| 11770 | demand_empty_rest_of_line (); |
| 11771 | break; |
| 11772 | |
| 11773 | case 'r': |
| 11774 | seg = subseg_new (RDATA_SECTION_NAME, |
| 11775 | (subsegT) get_absolute_expression ()); |
| 11776 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour) |
| 11777 | { |
| 11778 | bfd_set_section_flags (stdoutput, seg, (SEC_ALLOC | SEC_LOAD |
| 11779 | | SEC_READONLY | SEC_RELOC |
| 11780 | | SEC_DATA)); |
| 11781 | if (strcmp (TARGET_OS, "elf") != 0) |
| 11782 | record_alignment (seg, 4); |
| 11783 | } |
| 11784 | demand_empty_rest_of_line (); |
| 11785 | break; |
| 11786 | |
| 11787 | case 's': |
| 11788 | seg = subseg_new (".sdata", (subsegT) get_absolute_expression ()); |
| 11789 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour) |
| 11790 | { |
| 11791 | bfd_set_section_flags (stdoutput, seg, |
| 11792 | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA); |
| 11793 | if (strcmp (TARGET_OS, "elf") != 0) |
| 11794 | record_alignment (seg, 4); |
| 11795 | } |
| 11796 | demand_empty_rest_of_line (); |
| 11797 | break; |
| 11798 | } |
| 11799 | |
| 11800 | auto_align = 1; |
| 11801 | } |
| 11802 | |
| 11803 | void |
| 11804 | s_change_section (int ignore ATTRIBUTE_UNUSED) |
| 11805 | { |
| 11806 | #ifdef OBJ_ELF |
| 11807 | char *section_name; |
| 11808 | char c; |
| 11809 | char next_c = 0; |
| 11810 | int section_type; |
| 11811 | int section_flag; |
| 11812 | int section_entry_size; |
| 11813 | int section_alignment; |
| 11814 | |
| 11815 | if (OUTPUT_FLAVOR != bfd_target_elf_flavour) |
| 11816 | return; |
| 11817 | |
| 11818 | section_name = input_line_pointer; |
| 11819 | c = get_symbol_end (); |
| 11820 | if (c) |
| 11821 | next_c = *(input_line_pointer + 1); |
| 11822 | |
| 11823 | /* Do we have .section Name<,"flags">? */ |
| 11824 | if (c != ',' || (c == ',' && next_c == '"')) |
| 11825 | { |
| 11826 | /* just after name is now '\0'. */ |
| 11827 | *input_line_pointer = c; |
| 11828 | input_line_pointer = section_name; |
| 11829 | obj_elf_section (ignore); |
| 11830 | return; |
| 11831 | } |
| 11832 | input_line_pointer++; |
| 11833 | |
| 11834 | /* Do we have .section Name<,type><,flag><,entry_size><,alignment> */ |
| 11835 | if (c == ',') |
| 11836 | section_type = get_absolute_expression (); |
| 11837 | else |
| 11838 | section_type = 0; |
| 11839 | if (*input_line_pointer++ == ',') |
| 11840 | section_flag = get_absolute_expression (); |
| 11841 | else |
| 11842 | section_flag = 0; |
| 11843 | if (*input_line_pointer++ == ',') |
| 11844 | section_entry_size = get_absolute_expression (); |
| 11845 | else |
| 11846 | section_entry_size = 0; |
| 11847 | if (*input_line_pointer++ == ',') |
| 11848 | section_alignment = get_absolute_expression (); |
| 11849 | else |
| 11850 | section_alignment = 0; |
| 11851 | |
| 11852 | section_name = xstrdup (section_name); |
| 11853 | |
| 11854 | /* When using the generic form of .section (as implemented by obj-elf.c), |
| 11855 | there's no way to set the section type to SHT_MIPS_DWARF. Users have |
| 11856 | traditionally had to fall back on the more common @progbits instead. |
| 11857 | |
| 11858 | There's nothing really harmful in this, since bfd will correct |
| 11859 | SHT_PROGBITS to SHT_MIPS_DWARF before writing out the file. But it |
| 11860 | means that, for backwards compatibility, the special_section entries |
| 11861 | for dwarf sections must use SHT_PROGBITS rather than SHT_MIPS_DWARF. |
| 11862 | |
| 11863 | Even so, we shouldn't force users of the MIPS .section syntax to |
| 11864 | incorrectly label the sections as SHT_PROGBITS. The best compromise |
| 11865 | seems to be to map SHT_MIPS_DWARF to SHT_PROGBITS before calling the |
| 11866 | generic type-checking code. */ |
| 11867 | if (section_type == SHT_MIPS_DWARF) |
| 11868 | section_type = SHT_PROGBITS; |
| 11869 | |
| 11870 | obj_elf_change_section (section_name, section_type, section_flag, |
| 11871 | section_entry_size, 0, 0, 0); |
| 11872 | |
| 11873 | if (now_seg->name != section_name) |
| 11874 | free (section_name); |
| 11875 | #endif /* OBJ_ELF */ |
| 11876 | } |
| 11877 | |
| 11878 | void |
| 11879 | mips_enable_auto_align (void) |
| 11880 | { |
| 11881 | auto_align = 1; |
| 11882 | } |
| 11883 | |
| 11884 | static void |
| 11885 | s_cons (int log_size) |
| 11886 | { |
| 11887 | symbolS *label; |
| 11888 | |
| 11889 | label = insn_labels != NULL ? insn_labels->label : NULL; |
| 11890 | mips_emit_delays (); |
| 11891 | if (log_size > 0 && auto_align) |
| 11892 | mips_align (log_size, 0, label); |
| 11893 | mips_clear_insn_labels (); |
| 11894 | cons (1 << log_size); |
| 11895 | } |
| 11896 | |
| 11897 | static void |
| 11898 | s_float_cons (int type) |
| 11899 | { |
| 11900 | symbolS *label; |
| 11901 | |
| 11902 | label = insn_labels != NULL ? insn_labels->label : NULL; |
| 11903 | |
| 11904 | mips_emit_delays (); |
| 11905 | |
| 11906 | if (auto_align) |
| 11907 | { |
| 11908 | if (type == 'd') |
| 11909 | mips_align (3, 0, label); |
| 11910 | else |
| 11911 | mips_align (2, 0, label); |
| 11912 | } |
| 11913 | |
| 11914 | mips_clear_insn_labels (); |
| 11915 | |
| 11916 | float_cons (type); |
| 11917 | } |
| 11918 | |
| 11919 | /* Handle .globl. We need to override it because on Irix 5 you are |
| 11920 | permitted to say |
| 11921 | .globl foo .text |
| 11922 | where foo is an undefined symbol, to mean that foo should be |
| 11923 | considered to be the address of a function. */ |
| 11924 | |
| 11925 | static void |
| 11926 | s_mips_globl (int x ATTRIBUTE_UNUSED) |
| 11927 | { |
| 11928 | char *name; |
| 11929 | int c; |
| 11930 | symbolS *symbolP; |
| 11931 | flagword flag; |
| 11932 | |
| 11933 | do |
| 11934 | { |
| 11935 | name = input_line_pointer; |
| 11936 | c = get_symbol_end (); |
| 11937 | symbolP = symbol_find_or_make (name); |
| 11938 | S_SET_EXTERNAL (symbolP); |
| 11939 | |
| 11940 | *input_line_pointer = c; |
| 11941 | SKIP_WHITESPACE (); |
| 11942 | |
| 11943 | /* On Irix 5, every global symbol that is not explicitly labelled as |
| 11944 | being a function is apparently labelled as being an object. */ |
| 11945 | flag = BSF_OBJECT; |
| 11946 | |
| 11947 | if (!is_end_of_line[(unsigned char) *input_line_pointer] |
| 11948 | && (*input_line_pointer != ',')) |
| 11949 | { |
| 11950 | char *secname; |
| 11951 | asection *sec; |
| 11952 | |
| 11953 | secname = input_line_pointer; |
| 11954 | c = get_symbol_end (); |
| 11955 | sec = bfd_get_section_by_name (stdoutput, secname); |
| 11956 | if (sec == NULL) |
| 11957 | as_bad (_("%s: no such section"), secname); |
| 11958 | *input_line_pointer = c; |
| 11959 | |
| 11960 | if (sec != NULL && (sec->flags & SEC_CODE) != 0) |
| 11961 | flag = BSF_FUNCTION; |
| 11962 | } |
| 11963 | |
| 11964 | symbol_get_bfdsym (symbolP)->flags |= flag; |
| 11965 | |
| 11966 | c = *input_line_pointer; |
| 11967 | if (c == ',') |
| 11968 | { |
| 11969 | input_line_pointer++; |
| 11970 | SKIP_WHITESPACE (); |
| 11971 | if (is_end_of_line[(unsigned char) *input_line_pointer]) |
| 11972 | c = '\n'; |
| 11973 | } |
| 11974 | } |
| 11975 | while (c == ','); |
| 11976 | |
| 11977 | demand_empty_rest_of_line (); |
| 11978 | } |
| 11979 | |
| 11980 | static void |
| 11981 | s_option (int x ATTRIBUTE_UNUSED) |
| 11982 | { |
| 11983 | char *opt; |
| 11984 | char c; |
| 11985 | |
| 11986 | opt = input_line_pointer; |
| 11987 | c = get_symbol_end (); |
| 11988 | |
| 11989 | if (*opt == 'O') |
| 11990 | { |
| 11991 | /* FIXME: What does this mean? */ |
| 11992 | } |
| 11993 | else if (strncmp (opt, "pic", 3) == 0) |
| 11994 | { |
| 11995 | int i; |
| 11996 | |
| 11997 | i = atoi (opt + 3); |
| 11998 | if (i == 0) |
| 11999 | mips_pic = NO_PIC; |
| 12000 | else if (i == 2) |
| 12001 | { |
| 12002 | mips_pic = SVR4_PIC; |
| 12003 | mips_abicalls = TRUE; |
| 12004 | } |
| 12005 | else |
| 12006 | as_bad (_(".option pic%d not supported"), i); |
| 12007 | |
| 12008 | if (mips_pic == SVR4_PIC) |
| 12009 | { |
| 12010 | if (g_switch_seen && g_switch_value != 0) |
| 12011 | as_warn (_("-G may not be used with SVR4 PIC code")); |
| 12012 | g_switch_value = 0; |
| 12013 | bfd_set_gp_size (stdoutput, 0); |
| 12014 | } |
| 12015 | } |
| 12016 | else |
| 12017 | as_warn (_("Unrecognized option \"%s\""), opt); |
| 12018 | |
| 12019 | *input_line_pointer = c; |
| 12020 | demand_empty_rest_of_line (); |
| 12021 | } |
| 12022 | |
| 12023 | /* This structure is used to hold a stack of .set values. */ |
| 12024 | |
| 12025 | struct mips_option_stack |
| 12026 | { |
| 12027 | struct mips_option_stack *next; |
| 12028 | struct mips_set_options options; |
| 12029 | }; |
| 12030 | |
| 12031 | static struct mips_option_stack *mips_opts_stack; |
| 12032 | |
| 12033 | /* Handle the .set pseudo-op. */ |
| 12034 | |
| 12035 | static void |
| 12036 | s_mipsset (int x ATTRIBUTE_UNUSED) |
| 12037 | { |
| 12038 | char *name = input_line_pointer, ch; |
| 12039 | |
| 12040 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) |
| 12041 | ++input_line_pointer; |
| 12042 | ch = *input_line_pointer; |
| 12043 | *input_line_pointer = '\0'; |
| 12044 | |
| 12045 | if (strcmp (name, "reorder") == 0) |
| 12046 | { |
| 12047 | if (mips_opts.noreorder) |
| 12048 | end_noreorder (); |
| 12049 | } |
| 12050 | else if (strcmp (name, "noreorder") == 0) |
| 12051 | { |
| 12052 | if (!mips_opts.noreorder) |
| 12053 | start_noreorder (); |
| 12054 | } |
| 12055 | else if (strcmp (name, "at") == 0) |
| 12056 | { |
| 12057 | mips_opts.noat = 0; |
| 12058 | } |
| 12059 | else if (strcmp (name, "noat") == 0) |
| 12060 | { |
| 12061 | mips_opts.noat = 1; |
| 12062 | } |
| 12063 | else if (strcmp (name, "macro") == 0) |
| 12064 | { |
| 12065 | mips_opts.warn_about_macros = 0; |
| 12066 | } |
| 12067 | else if (strcmp (name, "nomacro") == 0) |
| 12068 | { |
| 12069 | if (mips_opts.noreorder == 0) |
| 12070 | as_bad (_("`noreorder' must be set before `nomacro'")); |
| 12071 | mips_opts.warn_about_macros = 1; |
| 12072 | } |
| 12073 | else if (strcmp (name, "move") == 0 || strcmp (name, "novolatile") == 0) |
| 12074 | { |
| 12075 | mips_opts.nomove = 0; |
| 12076 | } |
| 12077 | else if (strcmp (name, "nomove") == 0 || strcmp (name, "volatile") == 0) |
| 12078 | { |
| 12079 | mips_opts.nomove = 1; |
| 12080 | } |
| 12081 | else if (strcmp (name, "bopt") == 0) |
| 12082 | { |
| 12083 | mips_opts.nobopt = 0; |
| 12084 | } |
| 12085 | else if (strcmp (name, "nobopt") == 0) |
| 12086 | { |
| 12087 | mips_opts.nobopt = 1; |
| 12088 | } |
| 12089 | else if (strcmp (name, "mips16") == 0 |
| 12090 | || strcmp (name, "MIPS-16") == 0) |
| 12091 | mips_opts.mips16 = 1; |
| 12092 | else if (strcmp (name, "nomips16") == 0 |
| 12093 | || strcmp (name, "noMIPS-16") == 0) |
| 12094 | mips_opts.mips16 = 0; |
| 12095 | else if (strcmp (name, "mips3d") == 0) |
| 12096 | mips_opts.ase_mips3d = 1; |
| 12097 | else if (strcmp (name, "nomips3d") == 0) |
| 12098 | mips_opts.ase_mips3d = 0; |
| 12099 | else if (strcmp (name, "mdmx") == 0) |
| 12100 | mips_opts.ase_mdmx = 1; |
| 12101 | else if (strcmp (name, "nomdmx") == 0) |
| 12102 | mips_opts.ase_mdmx = 0; |
| 12103 | else if (strcmp (name, "dsp") == 0) |
| 12104 | mips_opts.ase_dsp = 1; |
| 12105 | else if (strcmp (name, "nodsp") == 0) |
| 12106 | mips_opts.ase_dsp = 0; |
| 12107 | else if (strcmp (name, "mt") == 0) |
| 12108 | mips_opts.ase_mt = 1; |
| 12109 | else if (strcmp (name, "nomt") == 0) |
| 12110 | mips_opts.ase_mt = 0; |
| 12111 | else if (strncmp (name, "mips", 4) == 0 || strncmp (name, "arch=", 5) == 0) |
| 12112 | { |
| 12113 | int reset = 0; |
| 12114 | |
| 12115 | /* Permit the user to change the ISA and architecture on the fly. |
| 12116 | Needless to say, misuse can cause serious problems. */ |
| 12117 | if (strcmp (name, "mips0") == 0 || strcmp (name, "arch=default") == 0) |
| 12118 | { |
| 12119 | reset = 1; |
| 12120 | mips_opts.isa = file_mips_isa; |
| 12121 | mips_opts.arch = file_mips_arch; |
| 12122 | } |
| 12123 | else if (strncmp (name, "arch=", 5) == 0) |
| 12124 | { |
| 12125 | const struct mips_cpu_info *p; |
| 12126 | |
| 12127 | p = mips_parse_cpu("internal use", name + 5); |
| 12128 | if (!p) |
| 12129 | as_bad (_("unknown architecture %s"), name + 5); |
| 12130 | else |
| 12131 | { |
| 12132 | mips_opts.arch = p->cpu; |
| 12133 | mips_opts.isa = p->isa; |
| 12134 | } |
| 12135 | } |
| 12136 | else if (strncmp (name, "mips", 4) == 0) |
| 12137 | { |
| 12138 | const struct mips_cpu_info *p; |
| 12139 | |
| 12140 | p = mips_parse_cpu("internal use", name); |
| 12141 | if (!p) |
| 12142 | as_bad (_("unknown ISA level %s"), name + 4); |
| 12143 | else |
| 12144 | { |
| 12145 | mips_opts.arch = p->cpu; |
| 12146 | mips_opts.isa = p->isa; |
| 12147 | } |
| 12148 | } |
| 12149 | else |
| 12150 | as_bad (_("unknown ISA or architecture %s"), name); |
| 12151 | |
| 12152 | switch (mips_opts.isa) |
| 12153 | { |
| 12154 | case 0: |
| 12155 | break; |
| 12156 | case ISA_MIPS1: |
| 12157 | case ISA_MIPS2: |
| 12158 | case ISA_MIPS32: |
| 12159 | case ISA_MIPS32R2: |
| 12160 | mips_opts.gp32 = 1; |
| 12161 | mips_opts.fp32 = 1; |
| 12162 | break; |
| 12163 | case ISA_MIPS3: |
| 12164 | case ISA_MIPS4: |
| 12165 | case ISA_MIPS5: |
| 12166 | case ISA_MIPS64: |
| 12167 | case ISA_MIPS64R2: |
| 12168 | mips_opts.gp32 = 0; |
| 12169 | mips_opts.fp32 = 0; |
| 12170 | break; |
| 12171 | default: |
| 12172 | as_bad (_("unknown ISA level %s"), name + 4); |
| 12173 | break; |
| 12174 | } |
| 12175 | if (reset) |
| 12176 | { |
| 12177 | mips_opts.gp32 = file_mips_gp32; |
| 12178 | mips_opts.fp32 = file_mips_fp32; |
| 12179 | } |
| 12180 | } |
| 12181 | else if (strcmp (name, "autoextend") == 0) |
| 12182 | mips_opts.noautoextend = 0; |
| 12183 | else if (strcmp (name, "noautoextend") == 0) |
| 12184 | mips_opts.noautoextend = 1; |
| 12185 | else if (strcmp (name, "push") == 0) |
| 12186 | { |
| 12187 | struct mips_option_stack *s; |
| 12188 | |
| 12189 | s = (struct mips_option_stack *) xmalloc (sizeof *s); |
| 12190 | s->next = mips_opts_stack; |
| 12191 | s->options = mips_opts; |
| 12192 | mips_opts_stack = s; |
| 12193 | } |
| 12194 | else if (strcmp (name, "pop") == 0) |
| 12195 | { |
| 12196 | struct mips_option_stack *s; |
| 12197 | |
| 12198 | s = mips_opts_stack; |
| 12199 | if (s == NULL) |
| 12200 | as_bad (_(".set pop with no .set push")); |
| 12201 | else |
| 12202 | { |
| 12203 | /* If we're changing the reorder mode we need to handle |
| 12204 | delay slots correctly. */ |
| 12205 | if (s->options.noreorder && ! mips_opts.noreorder) |
| 12206 | start_noreorder (); |
| 12207 | else if (! s->options.noreorder && mips_opts.noreorder) |
| 12208 | end_noreorder (); |
| 12209 | |
| 12210 | mips_opts = s->options; |
| 12211 | mips_opts_stack = s->next; |
| 12212 | free (s); |
| 12213 | } |
| 12214 | } |
| 12215 | else if (strcmp (name, "sym32") == 0) |
| 12216 | mips_opts.sym32 = TRUE; |
| 12217 | else if (strcmp (name, "nosym32") == 0) |
| 12218 | mips_opts.sym32 = FALSE; |
| 12219 | else |
| 12220 | { |
| 12221 | as_warn (_("Tried to set unrecognized symbol: %s\n"), name); |
| 12222 | } |
| 12223 | *input_line_pointer = ch; |
| 12224 | demand_empty_rest_of_line (); |
| 12225 | } |
| 12226 | |
| 12227 | /* Handle the .abicalls pseudo-op. I believe this is equivalent to |
| 12228 | .option pic2. It means to generate SVR4 PIC calls. */ |
| 12229 | |
| 12230 | static void |
| 12231 | s_abicalls (int ignore ATTRIBUTE_UNUSED) |
| 12232 | { |
| 12233 | mips_pic = SVR4_PIC; |
| 12234 | mips_abicalls = TRUE; |
| 12235 | |
| 12236 | if (g_switch_seen && g_switch_value != 0) |
| 12237 | as_warn (_("-G may not be used with SVR4 PIC code")); |
| 12238 | g_switch_value = 0; |
| 12239 | |
| 12240 | bfd_set_gp_size (stdoutput, 0); |
| 12241 | demand_empty_rest_of_line (); |
| 12242 | } |
| 12243 | |
| 12244 | /* Handle the .cpload pseudo-op. This is used when generating SVR4 |
| 12245 | PIC code. It sets the $gp register for the function based on the |
| 12246 | function address, which is in the register named in the argument. |
| 12247 | This uses a relocation against _gp_disp, which is handled specially |
| 12248 | by the linker. The result is: |
| 12249 | lui $gp,%hi(_gp_disp) |
| 12250 | addiu $gp,$gp,%lo(_gp_disp) |
| 12251 | addu $gp,$gp,.cpload argument |
| 12252 | The .cpload argument is normally $25 == $t9. |
| 12253 | |
| 12254 | The -mno-shared option changes this to: |
| 12255 | lui $gp,%hi(__gnu_local_gp) |
| 12256 | addiu $gp,$gp,%lo(__gnu_local_gp) |
| 12257 | and the argument is ignored. This saves an instruction, but the |
| 12258 | resulting code is not position independent; it uses an absolute |
| 12259 | address for __gnu_local_gp. Thus code assembled with -mno-shared |
| 12260 | can go into an ordinary executable, but not into a shared library. */ |
| 12261 | |
| 12262 | static void |
| 12263 | s_cpload (int ignore ATTRIBUTE_UNUSED) |
| 12264 | { |
| 12265 | expressionS ex; |
| 12266 | int reg; |
| 12267 | int in_shared; |
| 12268 | |
| 12269 | /* If we are not generating SVR4 PIC code, or if this is NewABI code, |
| 12270 | .cpload is ignored. */ |
| 12271 | if (mips_pic != SVR4_PIC || HAVE_NEWABI) |
| 12272 | { |
| 12273 | s_ignore (0); |
| 12274 | return; |
| 12275 | } |
| 12276 | |
| 12277 | /* .cpload should be in a .set noreorder section. */ |
| 12278 | if (mips_opts.noreorder == 0) |
| 12279 | as_warn (_(".cpload not in noreorder section")); |
| 12280 | |
| 12281 | reg = tc_get_register (0); |
| 12282 | |
| 12283 | /* If we need to produce a 64-bit address, we are better off using |
| 12284 | the default instruction sequence. */ |
| 12285 | in_shared = mips_in_shared || HAVE_64BIT_SYMBOLS; |
| 12286 | |
| 12287 | ex.X_op = O_symbol; |
| 12288 | ex.X_add_symbol = symbol_find_or_make (in_shared ? "_gp_disp" : |
| 12289 | "__gnu_local_gp"); |
| 12290 | ex.X_op_symbol = NULL; |
| 12291 | ex.X_add_number = 0; |
| 12292 | |
| 12293 | /* In ELF, this symbol is implicitly an STT_OBJECT symbol. */ |
| 12294 | symbol_get_bfdsym (ex.X_add_symbol)->flags |= BSF_OBJECT; |
| 12295 | |
| 12296 | macro_start (); |
| 12297 | macro_build_lui (&ex, mips_gp_register); |
| 12298 | macro_build (&ex, "addiu", "t,r,j", mips_gp_register, |
| 12299 | mips_gp_register, BFD_RELOC_LO16); |
| 12300 | if (in_shared) |
| 12301 | macro_build (NULL, "addu", "d,v,t", mips_gp_register, |
| 12302 | mips_gp_register, reg); |
| 12303 | macro_end (); |
| 12304 | |
| 12305 | demand_empty_rest_of_line (); |
| 12306 | } |
| 12307 | |
| 12308 | /* Handle the .cpsetup pseudo-op defined for NewABI PIC code. The syntax is: |
| 12309 | .cpsetup $reg1, offset|$reg2, label |
| 12310 | |
| 12311 | If offset is given, this results in: |
| 12312 | sd $gp, offset($sp) |
| 12313 | lui $gp, %hi(%neg(%gp_rel(label))) |
| 12314 | addiu $gp, $gp, %lo(%neg(%gp_rel(label))) |
| 12315 | daddu $gp, $gp, $reg1 |
| 12316 | |
| 12317 | If $reg2 is given, this results in: |
| 12318 | daddu $reg2, $gp, $0 |
| 12319 | lui $gp, %hi(%neg(%gp_rel(label))) |
| 12320 | addiu $gp, $gp, %lo(%neg(%gp_rel(label))) |
| 12321 | daddu $gp, $gp, $reg1 |
| 12322 | $reg1 is normally $25 == $t9. |
| 12323 | |
| 12324 | The -mno-shared option replaces the last three instructions with |
| 12325 | lui $gp,%hi(_gp) |
| 12326 | addiu $gp,$gp,%lo(_gp) |
| 12327 | */ |
| 12328 | |
| 12329 | static void |
| 12330 | s_cpsetup (int ignore ATTRIBUTE_UNUSED) |
| 12331 | { |
| 12332 | expressionS ex_off; |
| 12333 | expressionS ex_sym; |
| 12334 | int reg1; |
| 12335 | |
| 12336 | /* If we are not generating SVR4 PIC code, .cpsetup is ignored. |
| 12337 | We also need NewABI support. */ |
| 12338 | if (mips_pic != SVR4_PIC || ! HAVE_NEWABI) |
| 12339 | { |
| 12340 | s_ignore (0); |
| 12341 | return; |
| 12342 | } |
| 12343 | |
| 12344 | reg1 = tc_get_register (0); |
| 12345 | SKIP_WHITESPACE (); |
| 12346 | if (*input_line_pointer != ',') |
| 12347 | { |
| 12348 | as_bad (_("missing argument separator ',' for .cpsetup")); |
| 12349 | return; |
| 12350 | } |
| 12351 | else |
| 12352 | ++input_line_pointer; |
| 12353 | SKIP_WHITESPACE (); |
| 12354 | if (*input_line_pointer == '$') |
| 12355 | { |
| 12356 | mips_cpreturn_register = tc_get_register (0); |
| 12357 | mips_cpreturn_offset = -1; |
| 12358 | } |
| 12359 | else |
| 12360 | { |
| 12361 | mips_cpreturn_offset = get_absolute_expression (); |
| 12362 | mips_cpreturn_register = -1; |
| 12363 | } |
| 12364 | SKIP_WHITESPACE (); |
| 12365 | if (*input_line_pointer != ',') |
| 12366 | { |
| 12367 | as_bad (_("missing argument separator ',' for .cpsetup")); |
| 12368 | return; |
| 12369 | } |
| 12370 | else |
| 12371 | ++input_line_pointer; |
| 12372 | SKIP_WHITESPACE (); |
| 12373 | expression (&ex_sym); |
| 12374 | |
| 12375 | macro_start (); |
| 12376 | if (mips_cpreturn_register == -1) |
| 12377 | { |
| 12378 | ex_off.X_op = O_constant; |
| 12379 | ex_off.X_add_symbol = NULL; |
| 12380 | ex_off.X_op_symbol = NULL; |
| 12381 | ex_off.X_add_number = mips_cpreturn_offset; |
| 12382 | |
| 12383 | macro_build (&ex_off, "sd", "t,o(b)", mips_gp_register, |
| 12384 | BFD_RELOC_LO16, SP); |
| 12385 | } |
| 12386 | else |
| 12387 | macro_build (NULL, "daddu", "d,v,t", mips_cpreturn_register, |
| 12388 | mips_gp_register, 0); |
| 12389 | |
| 12390 | if (mips_in_shared || HAVE_64BIT_SYMBOLS) |
| 12391 | { |
| 12392 | macro_build (&ex_sym, "lui", "t,u", mips_gp_register, |
| 12393 | -1, BFD_RELOC_GPREL16, BFD_RELOC_MIPS_SUB, |
| 12394 | BFD_RELOC_HI16_S); |
| 12395 | |
| 12396 | macro_build (&ex_sym, "addiu", "t,r,j", mips_gp_register, |
| 12397 | mips_gp_register, -1, BFD_RELOC_GPREL16, |
| 12398 | BFD_RELOC_MIPS_SUB, BFD_RELOC_LO16); |
| 12399 | |
| 12400 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", mips_gp_register, |
| 12401 | mips_gp_register, reg1); |
| 12402 | } |
| 12403 | else |
| 12404 | { |
| 12405 | expressionS ex; |
| 12406 | |
| 12407 | ex.X_op = O_symbol; |
| 12408 | ex.X_add_symbol = symbol_find_or_make ("__gnu_local_gp"); |
| 12409 | ex.X_op_symbol = NULL; |
| 12410 | ex.X_add_number = 0; |
| 12411 | |
| 12412 | /* In ELF, this symbol is implicitly an STT_OBJECT symbol. */ |
| 12413 | symbol_get_bfdsym (ex.X_add_symbol)->flags |= BSF_OBJECT; |
| 12414 | |
| 12415 | macro_build_lui (&ex, mips_gp_register); |
| 12416 | macro_build (&ex, "addiu", "t,r,j", mips_gp_register, |
| 12417 | mips_gp_register, BFD_RELOC_LO16); |
| 12418 | } |
| 12419 | |
| 12420 | macro_end (); |
| 12421 | |
| 12422 | demand_empty_rest_of_line (); |
| 12423 | } |
| 12424 | |
| 12425 | static void |
| 12426 | s_cplocal (int ignore ATTRIBUTE_UNUSED) |
| 12427 | { |
| 12428 | /* If we are not generating SVR4 PIC code, or if this is not NewABI code, |
| 12429 | .cplocal is ignored. */ |
| 12430 | if (mips_pic != SVR4_PIC || ! HAVE_NEWABI) |
| 12431 | { |
| 12432 | s_ignore (0); |
| 12433 | return; |
| 12434 | } |
| 12435 | |
| 12436 | mips_gp_register = tc_get_register (0); |
| 12437 | demand_empty_rest_of_line (); |
| 12438 | } |
| 12439 | |
| 12440 | /* Handle the .cprestore pseudo-op. This stores $gp into a given |
| 12441 | offset from $sp. The offset is remembered, and after making a PIC |
| 12442 | call $gp is restored from that location. */ |
| 12443 | |
| 12444 | static void |
| 12445 | s_cprestore (int ignore ATTRIBUTE_UNUSED) |
| 12446 | { |
| 12447 | expressionS ex; |
| 12448 | |
| 12449 | /* If we are not generating SVR4 PIC code, or if this is NewABI code, |
| 12450 | .cprestore is ignored. */ |
| 12451 | if (mips_pic != SVR4_PIC || HAVE_NEWABI) |
| 12452 | { |
| 12453 | s_ignore (0); |
| 12454 | return; |
| 12455 | } |
| 12456 | |
| 12457 | mips_cprestore_offset = get_absolute_expression (); |
| 12458 | mips_cprestore_valid = 1; |
| 12459 | |
| 12460 | ex.X_op = O_constant; |
| 12461 | ex.X_add_symbol = NULL; |
| 12462 | ex.X_op_symbol = NULL; |
| 12463 | ex.X_add_number = mips_cprestore_offset; |
| 12464 | |
| 12465 | macro_start (); |
| 12466 | macro_build_ldst_constoffset (&ex, ADDRESS_STORE_INSN, mips_gp_register, |
| 12467 | SP, HAVE_64BIT_ADDRESSES); |
| 12468 | macro_end (); |
| 12469 | |
| 12470 | demand_empty_rest_of_line (); |
| 12471 | } |
| 12472 | |
| 12473 | /* Handle the .cpreturn pseudo-op defined for NewABI PIC code. If an offset |
| 12474 | was given in the preceding .cpsetup, it results in: |
| 12475 | ld $gp, offset($sp) |
| 12476 | |
| 12477 | If a register $reg2 was given there, it results in: |
| 12478 | daddu $gp, $reg2, $0 |
| 12479 | */ |
| 12480 | static void |
| 12481 | s_cpreturn (int ignore ATTRIBUTE_UNUSED) |
| 12482 | { |
| 12483 | expressionS ex; |
| 12484 | |
| 12485 | /* If we are not generating SVR4 PIC code, .cpreturn is ignored. |
| 12486 | We also need NewABI support. */ |
| 12487 | if (mips_pic != SVR4_PIC || ! HAVE_NEWABI) |
| 12488 | { |
| 12489 | s_ignore (0); |
| 12490 | return; |
| 12491 | } |
| 12492 | |
| 12493 | macro_start (); |
| 12494 | if (mips_cpreturn_register == -1) |
| 12495 | { |
| 12496 | ex.X_op = O_constant; |
| 12497 | ex.X_add_symbol = NULL; |
| 12498 | ex.X_op_symbol = NULL; |
| 12499 | ex.X_add_number = mips_cpreturn_offset; |
| 12500 | |
| 12501 | macro_build (&ex, "ld", "t,o(b)", mips_gp_register, BFD_RELOC_LO16, SP); |
| 12502 | } |
| 12503 | else |
| 12504 | macro_build (NULL, "daddu", "d,v,t", mips_gp_register, |
| 12505 | mips_cpreturn_register, 0); |
| 12506 | macro_end (); |
| 12507 | |
| 12508 | demand_empty_rest_of_line (); |
| 12509 | } |
| 12510 | |
| 12511 | /* Handle the .gpvalue pseudo-op. This is used when generating NewABI PIC |
| 12512 | code. It sets the offset to use in gp_rel relocations. */ |
| 12513 | |
| 12514 | static void |
| 12515 | s_gpvalue (int ignore ATTRIBUTE_UNUSED) |
| 12516 | { |
| 12517 | /* If we are not generating SVR4 PIC code, .gpvalue is ignored. |
| 12518 | We also need NewABI support. */ |
| 12519 | if (mips_pic != SVR4_PIC || ! HAVE_NEWABI) |
| 12520 | { |
| 12521 | s_ignore (0); |
| 12522 | return; |
| 12523 | } |
| 12524 | |
| 12525 | mips_gprel_offset = get_absolute_expression (); |
| 12526 | |
| 12527 | demand_empty_rest_of_line (); |
| 12528 | } |
| 12529 | |
| 12530 | /* Handle the .gpword pseudo-op. This is used when generating PIC |
| 12531 | code. It generates a 32 bit GP relative reloc. */ |
| 12532 | |
| 12533 | static void |
| 12534 | s_gpword (int ignore ATTRIBUTE_UNUSED) |
| 12535 | { |
| 12536 | symbolS *label; |
| 12537 | expressionS ex; |
| 12538 | char *p; |
| 12539 | |
| 12540 | /* When not generating PIC code, this is treated as .word. */ |
| 12541 | if (mips_pic != SVR4_PIC) |
| 12542 | { |
| 12543 | s_cons (2); |
| 12544 | return; |
| 12545 | } |
| 12546 | |
| 12547 | label = insn_labels != NULL ? insn_labels->label : NULL; |
| 12548 | mips_emit_delays (); |
| 12549 | if (auto_align) |
| 12550 | mips_align (2, 0, label); |
| 12551 | mips_clear_insn_labels (); |
| 12552 | |
| 12553 | expression (&ex); |
| 12554 | |
| 12555 | if (ex.X_op != O_symbol || ex.X_add_number != 0) |
| 12556 | { |
| 12557 | as_bad (_("Unsupported use of .gpword")); |
| 12558 | ignore_rest_of_line (); |
| 12559 | } |
| 12560 | |
| 12561 | p = frag_more (4); |
| 12562 | md_number_to_chars (p, 0, 4); |
| 12563 | fix_new_exp (frag_now, p - frag_now->fr_literal, 4, &ex, FALSE, |
| 12564 | BFD_RELOC_GPREL32); |
| 12565 | |
| 12566 | demand_empty_rest_of_line (); |
| 12567 | } |
| 12568 | |
| 12569 | static void |
| 12570 | s_gpdword (int ignore ATTRIBUTE_UNUSED) |
| 12571 | { |
| 12572 | symbolS *label; |
| 12573 | expressionS ex; |
| 12574 | char *p; |
| 12575 | |
| 12576 | /* When not generating PIC code, this is treated as .dword. */ |
| 12577 | if (mips_pic != SVR4_PIC) |
| 12578 | { |
| 12579 | s_cons (3); |
| 12580 | return; |
| 12581 | } |
| 12582 | |
| 12583 | label = insn_labels != NULL ? insn_labels->label : NULL; |
| 12584 | mips_emit_delays (); |
| 12585 | if (auto_align) |
| 12586 | mips_align (3, 0, label); |
| 12587 | mips_clear_insn_labels (); |
| 12588 | |
| 12589 | expression (&ex); |
| 12590 | |
| 12591 | if (ex.X_op != O_symbol || ex.X_add_number != 0) |
| 12592 | { |
| 12593 | as_bad (_("Unsupported use of .gpdword")); |
| 12594 | ignore_rest_of_line (); |
| 12595 | } |
| 12596 | |
| 12597 | p = frag_more (8); |
| 12598 | md_number_to_chars (p, 0, 8); |
| 12599 | fix_new_exp (frag_now, p - frag_now->fr_literal, 4, &ex, FALSE, |
| 12600 | BFD_RELOC_GPREL32)->fx_tcbit = 1; |
| 12601 | |
| 12602 | /* GPREL32 composed with 64 gives a 64-bit GP offset. */ |
| 12603 | fix_new (frag_now, p - frag_now->fr_literal, 8, NULL, 0, |
| 12604 | FALSE, BFD_RELOC_64)->fx_tcbit = 1; |
| 12605 | |
| 12606 | demand_empty_rest_of_line (); |
| 12607 | } |
| 12608 | |
| 12609 | /* Handle the .cpadd pseudo-op. This is used when dealing with switch |
| 12610 | tables in SVR4 PIC code. */ |
| 12611 | |
| 12612 | static void |
| 12613 | s_cpadd (int ignore ATTRIBUTE_UNUSED) |
| 12614 | { |
| 12615 | int reg; |
| 12616 | |
| 12617 | /* This is ignored when not generating SVR4 PIC code. */ |
| 12618 | if (mips_pic != SVR4_PIC) |
| 12619 | { |
| 12620 | s_ignore (0); |
| 12621 | return; |
| 12622 | } |
| 12623 | |
| 12624 | /* Add $gp to the register named as an argument. */ |
| 12625 | macro_start (); |
| 12626 | reg = tc_get_register (0); |
| 12627 | macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", reg, reg, mips_gp_register); |
| 12628 | macro_end (); |
| 12629 | |
| 12630 | demand_empty_rest_of_line (); |
| 12631 | } |
| 12632 | |
| 12633 | /* Handle the .insn pseudo-op. This marks instruction labels in |
| 12634 | mips16 mode. This permits the linker to handle them specially, |
| 12635 | such as generating jalx instructions when needed. We also make |
| 12636 | them odd for the duration of the assembly, in order to generate the |
| 12637 | right sort of code. We will make them even in the adjust_symtab |
| 12638 | routine, while leaving them marked. This is convenient for the |
| 12639 | debugger and the disassembler. The linker knows to make them odd |
| 12640 | again. */ |
| 12641 | |
| 12642 | static void |
| 12643 | s_insn (int ignore ATTRIBUTE_UNUSED) |
| 12644 | { |
| 12645 | mips16_mark_labels (); |
| 12646 | |
| 12647 | demand_empty_rest_of_line (); |
| 12648 | } |
| 12649 | |
| 12650 | /* Handle a .stabn directive. We need these in order to mark a label |
| 12651 | as being a mips16 text label correctly. Sometimes the compiler |
| 12652 | will emit a label, followed by a .stabn, and then switch sections. |
| 12653 | If the label and .stabn are in mips16 mode, then the label is |
| 12654 | really a mips16 text label. */ |
| 12655 | |
| 12656 | static void |
| 12657 | s_mips_stab (int type) |
| 12658 | { |
| 12659 | if (type == 'n') |
| 12660 | mips16_mark_labels (); |
| 12661 | |
| 12662 | s_stab (type); |
| 12663 | } |
| 12664 | |
| 12665 | /* Handle the .weakext pseudo-op as defined in Kane and Heinrich. |
| 12666 | */ |
| 12667 | |
| 12668 | static void |
| 12669 | s_mips_weakext (int ignore ATTRIBUTE_UNUSED) |
| 12670 | { |
| 12671 | char *name; |
| 12672 | int c; |
| 12673 | symbolS *symbolP; |
| 12674 | expressionS exp; |
| 12675 | |
| 12676 | name = input_line_pointer; |
| 12677 | c = get_symbol_end (); |
| 12678 | symbolP = symbol_find_or_make (name); |
| 12679 | S_SET_WEAK (symbolP); |
| 12680 | *input_line_pointer = c; |
| 12681 | |
| 12682 | SKIP_WHITESPACE (); |
| 12683 | |
| 12684 | if (! is_end_of_line[(unsigned char) *input_line_pointer]) |
| 12685 | { |
| 12686 | if (S_IS_DEFINED (symbolP)) |
| 12687 | { |
| 12688 | as_bad ("ignoring attempt to redefine symbol %s", |
| 12689 | S_GET_NAME (symbolP)); |
| 12690 | ignore_rest_of_line (); |
| 12691 | return; |
| 12692 | } |
| 12693 | |
| 12694 | if (*input_line_pointer == ',') |
| 12695 | { |
| 12696 | ++input_line_pointer; |
| 12697 | SKIP_WHITESPACE (); |
| 12698 | } |
| 12699 | |
| 12700 | expression (&exp); |
| 12701 | if (exp.X_op != O_symbol) |
| 12702 | { |
| 12703 | as_bad ("bad .weakext directive"); |
| 12704 | ignore_rest_of_line (); |
| 12705 | return; |
| 12706 | } |
| 12707 | symbol_set_value_expression (symbolP, &exp); |
| 12708 | } |
| 12709 | |
| 12710 | demand_empty_rest_of_line (); |
| 12711 | } |
| 12712 | |
| 12713 | /* Parse a register string into a number. Called from the ECOFF code |
| 12714 | to parse .frame. The argument is non-zero if this is the frame |
| 12715 | register, so that we can record it in mips_frame_reg. */ |
| 12716 | |
| 12717 | int |
| 12718 | tc_get_register (int frame) |
| 12719 | { |
| 12720 | int reg; |
| 12721 | |
| 12722 | SKIP_WHITESPACE (); |
| 12723 | if (*input_line_pointer++ != '$') |
| 12724 | { |
| 12725 | as_warn (_("expected `$'")); |
| 12726 | reg = ZERO; |
| 12727 | } |
| 12728 | else if (ISDIGIT (*input_line_pointer)) |
| 12729 | { |
| 12730 | reg = get_absolute_expression (); |
| 12731 | if (reg < 0 || reg >= 32) |
| 12732 | { |
| 12733 | as_warn (_("Bad register number")); |
| 12734 | reg = ZERO; |
| 12735 | } |
| 12736 | } |
| 12737 | else |
| 12738 | { |
| 12739 | if (strncmp (input_line_pointer, "ra", 2) == 0) |
| 12740 | { |
| 12741 | reg = RA; |
| 12742 | input_line_pointer += 2; |
| 12743 | } |
| 12744 | else if (strncmp (input_line_pointer, "fp", 2) == 0) |
| 12745 | { |
| 12746 | reg = FP; |
| 12747 | input_line_pointer += 2; |
| 12748 | } |
| 12749 | else if (strncmp (input_line_pointer, "sp", 2) == 0) |
| 12750 | { |
| 12751 | reg = SP; |
| 12752 | input_line_pointer += 2; |
| 12753 | } |
| 12754 | else if (strncmp (input_line_pointer, "gp", 2) == 0) |
| 12755 | { |
| 12756 | reg = GP; |
| 12757 | input_line_pointer += 2; |
| 12758 | } |
| 12759 | else if (strncmp (input_line_pointer, "at", 2) == 0) |
| 12760 | { |
| 12761 | reg = AT; |
| 12762 | input_line_pointer += 2; |
| 12763 | } |
| 12764 | else if (strncmp (input_line_pointer, "kt0", 3) == 0) |
| 12765 | { |
| 12766 | reg = KT0; |
| 12767 | input_line_pointer += 3; |
| 12768 | } |
| 12769 | else if (strncmp (input_line_pointer, "kt1", 3) == 0) |
| 12770 | { |
| 12771 | reg = KT1; |
| 12772 | input_line_pointer += 3; |
| 12773 | } |
| 12774 | else if (strncmp (input_line_pointer, "zero", 4) == 0) |
| 12775 | { |
| 12776 | reg = ZERO; |
| 12777 | input_line_pointer += 4; |
| 12778 | } |
| 12779 | else |
| 12780 | { |
| 12781 | as_warn (_("Unrecognized register name")); |
| 12782 | reg = ZERO; |
| 12783 | while (ISALNUM(*input_line_pointer)) |
| 12784 | input_line_pointer++; |
| 12785 | } |
| 12786 | } |
| 12787 | if (frame) |
| 12788 | { |
| 12789 | mips_frame_reg = reg != 0 ? reg : SP; |
| 12790 | mips_frame_reg_valid = 1; |
| 12791 | mips_cprestore_valid = 0; |
| 12792 | } |
| 12793 | return reg; |
| 12794 | } |
| 12795 | |
| 12796 | valueT |
| 12797 | md_section_align (asection *seg, valueT addr) |
| 12798 | { |
| 12799 | int align = bfd_get_section_alignment (stdoutput, seg); |
| 12800 | |
| 12801 | #ifdef OBJ_ELF |
| 12802 | /* We don't need to align ELF sections to the full alignment. |
| 12803 | However, Irix 5 may prefer that we align them at least to a 16 |
| 12804 | byte boundary. We don't bother to align the sections if we are |
| 12805 | targeted for an embedded system. */ |
| 12806 | if (strcmp (TARGET_OS, "elf") == 0) |
| 12807 | return addr; |
| 12808 | if (align > 4) |
| 12809 | align = 4; |
| 12810 | #endif |
| 12811 | |
| 12812 | return ((addr + (1 << align) - 1) & (-1 << align)); |
| 12813 | } |
| 12814 | |
| 12815 | /* Utility routine, called from above as well. If called while the |
| 12816 | input file is still being read, it's only an approximation. (For |
| 12817 | example, a symbol may later become defined which appeared to be |
| 12818 | undefined earlier.) */ |
| 12819 | |
| 12820 | static int |
| 12821 | nopic_need_relax (symbolS *sym, int before_relaxing) |
| 12822 | { |
| 12823 | if (sym == 0) |
| 12824 | return 0; |
| 12825 | |
| 12826 | if (g_switch_value > 0) |
| 12827 | { |
| 12828 | const char *symname; |
| 12829 | int change; |
| 12830 | |
| 12831 | /* Find out whether this symbol can be referenced off the $gp |
| 12832 | register. It can be if it is smaller than the -G size or if |
| 12833 | it is in the .sdata or .sbss section. Certain symbols can |
| 12834 | not be referenced off the $gp, although it appears as though |
| 12835 | they can. */ |
| 12836 | symname = S_GET_NAME (sym); |
| 12837 | if (symname != (const char *) NULL |
| 12838 | && (strcmp (symname, "eprol") == 0 |
| 12839 | || strcmp (symname, "etext") == 0 |
| 12840 | || strcmp (symname, "_gp") == 0 |
| 12841 | || strcmp (symname, "edata") == 0 |
| 12842 | || strcmp (symname, "_fbss") == 0 |
| 12843 | || strcmp (symname, "_fdata") == 0 |
| 12844 | || strcmp (symname, "_ftext") == 0 |
| 12845 | || strcmp (symname, "end") == 0 |
| 12846 | || strcmp (symname, "_gp_disp") == 0)) |
| 12847 | change = 1; |
| 12848 | else if ((! S_IS_DEFINED (sym) || S_IS_COMMON (sym)) |
| 12849 | && (0 |
| 12850 | #ifndef NO_ECOFF_DEBUGGING |
| 12851 | || (symbol_get_obj (sym)->ecoff_extern_size != 0 |
| 12852 | && (symbol_get_obj (sym)->ecoff_extern_size |
| 12853 | <= g_switch_value)) |
| 12854 | #endif |
| 12855 | /* We must defer this decision until after the whole |
| 12856 | file has been read, since there might be a .extern |
| 12857 | after the first use of this symbol. */ |
| 12858 | || (before_relaxing |
| 12859 | #ifndef NO_ECOFF_DEBUGGING |
| 12860 | && symbol_get_obj (sym)->ecoff_extern_size == 0 |
| 12861 | #endif |
| 12862 | && S_GET_VALUE (sym) == 0) |
| 12863 | || (S_GET_VALUE (sym) != 0 |
| 12864 | && S_GET_VALUE (sym) <= g_switch_value))) |
| 12865 | change = 0; |
| 12866 | else |
| 12867 | { |
| 12868 | const char *segname; |
| 12869 | |
| 12870 | segname = segment_name (S_GET_SEGMENT (sym)); |
| 12871 | assert (strcmp (segname, ".lit8") != 0 |
| 12872 | && strcmp (segname, ".lit4") != 0); |
| 12873 | change = (strcmp (segname, ".sdata") != 0 |
| 12874 | && strcmp (segname, ".sbss") != 0 |
| 12875 | && strncmp (segname, ".sdata.", 7) != 0 |
| 12876 | && strncmp (segname, ".gnu.linkonce.s.", 16) != 0); |
| 12877 | } |
| 12878 | return change; |
| 12879 | } |
| 12880 | else |
| 12881 | /* We are not optimizing for the $gp register. */ |
| 12882 | return 1; |
| 12883 | } |
| 12884 | |
| 12885 | |
| 12886 | /* Return true if the given symbol should be considered local for SVR4 PIC. */ |
| 12887 | |
| 12888 | static bfd_boolean |
| 12889 | pic_need_relax (symbolS *sym, asection *segtype) |
| 12890 | { |
| 12891 | asection *symsec; |
| 12892 | bfd_boolean linkonce; |
| 12893 | |
| 12894 | /* Handle the case of a symbol equated to another symbol. */ |
| 12895 | while (symbol_equated_reloc_p (sym)) |
| 12896 | { |
| 12897 | symbolS *n; |
| 12898 | |
| 12899 | /* It's possible to get a loop here in a badly written |
| 12900 | program. */ |
| 12901 | n = symbol_get_value_expression (sym)->X_add_symbol; |
| 12902 | if (n == sym) |
| 12903 | break; |
| 12904 | sym = n; |
| 12905 | } |
| 12906 | |
| 12907 | symsec = S_GET_SEGMENT (sym); |
| 12908 | |
| 12909 | /* duplicate the test for LINK_ONCE sections as in adjust_reloc_syms */ |
| 12910 | linkonce = FALSE; |
| 12911 | if (symsec != segtype && ! S_IS_LOCAL (sym)) |
| 12912 | { |
| 12913 | if ((bfd_get_section_flags (stdoutput, symsec) & SEC_LINK_ONCE) |
| 12914 | != 0) |
| 12915 | linkonce = TRUE; |
| 12916 | |
| 12917 | /* The GNU toolchain uses an extension for ELF: a section |
| 12918 | beginning with the magic string .gnu.linkonce is a linkonce |
| 12919 | section. */ |
| 12920 | if (strncmp (segment_name (symsec), ".gnu.linkonce", |
| 12921 | sizeof ".gnu.linkonce" - 1) == 0) |
| 12922 | linkonce = TRUE; |
| 12923 | } |
| 12924 | |
| 12925 | /* This must duplicate the test in adjust_reloc_syms. */ |
| 12926 | return (symsec != &bfd_und_section |
| 12927 | && symsec != &bfd_abs_section |
| 12928 | && ! bfd_is_com_section (symsec) |
| 12929 | && !linkonce |
| 12930 | #ifdef OBJ_ELF |
| 12931 | /* A global or weak symbol is treated as external. */ |
| 12932 | && (OUTPUT_FLAVOR != bfd_target_elf_flavour |
| 12933 | || (! S_IS_WEAK (sym) && ! S_IS_EXTERNAL (sym))) |
| 12934 | #endif |
| 12935 | ); |
| 12936 | } |
| 12937 | |
| 12938 | |
| 12939 | /* Given a mips16 variant frag FRAGP, return non-zero if it needs an |
| 12940 | extended opcode. SEC is the section the frag is in. */ |
| 12941 | |
| 12942 | static int |
| 12943 | mips16_extended_frag (fragS *fragp, asection *sec, long stretch) |
| 12944 | { |
| 12945 | int type; |
| 12946 | register const struct mips16_immed_operand *op; |
| 12947 | offsetT val; |
| 12948 | int mintiny, maxtiny; |
| 12949 | segT symsec; |
| 12950 | fragS *sym_frag; |
| 12951 | |
| 12952 | if (RELAX_MIPS16_USER_SMALL (fragp->fr_subtype)) |
| 12953 | return 0; |
| 12954 | if (RELAX_MIPS16_USER_EXT (fragp->fr_subtype)) |
| 12955 | return 1; |
| 12956 | |
| 12957 | type = RELAX_MIPS16_TYPE (fragp->fr_subtype); |
| 12958 | op = mips16_immed_operands; |
| 12959 | while (op->type != type) |
| 12960 | { |
| 12961 | ++op; |
| 12962 | assert (op < mips16_immed_operands + MIPS16_NUM_IMMED); |
| 12963 | } |
| 12964 | |
| 12965 | if (op->unsp) |
| 12966 | { |
| 12967 | if (type == '<' || type == '>' || type == '[' || type == ']') |
| 12968 | { |
| 12969 | mintiny = 1; |
| 12970 | maxtiny = 1 << op->nbits; |
| 12971 | } |
| 12972 | else |
| 12973 | { |
| 12974 | mintiny = 0; |
| 12975 | maxtiny = (1 << op->nbits) - 1; |
| 12976 | } |
| 12977 | } |
| 12978 | else |
| 12979 | { |
| 12980 | mintiny = - (1 << (op->nbits - 1)); |
| 12981 | maxtiny = (1 << (op->nbits - 1)) - 1; |
| 12982 | } |
| 12983 | |
| 12984 | sym_frag = symbol_get_frag (fragp->fr_symbol); |
| 12985 | val = S_GET_VALUE (fragp->fr_symbol); |
| 12986 | symsec = S_GET_SEGMENT (fragp->fr_symbol); |
| 12987 | |
| 12988 | if (op->pcrel) |
| 12989 | { |
| 12990 | addressT addr; |
| 12991 | |
| 12992 | /* We won't have the section when we are called from |
| 12993 | mips_relax_frag. However, we will always have been called |
| 12994 | from md_estimate_size_before_relax first. If this is a |
| 12995 | branch to a different section, we mark it as such. If SEC is |
| 12996 | NULL, and the frag is not marked, then it must be a branch to |
| 12997 | the same section. */ |
| 12998 | if (sec == NULL) |
| 12999 | { |
| 13000 | if (RELAX_MIPS16_LONG_BRANCH (fragp->fr_subtype)) |
| 13001 | return 1; |
| 13002 | } |
| 13003 | else |
| 13004 | { |
| 13005 | /* Must have been called from md_estimate_size_before_relax. */ |
| 13006 | if (symsec != sec) |
| 13007 | { |
| 13008 | fragp->fr_subtype = |
| 13009 | RELAX_MIPS16_MARK_LONG_BRANCH (fragp->fr_subtype); |
| 13010 | |
| 13011 | /* FIXME: We should support this, and let the linker |
| 13012 | catch branches and loads that are out of range. */ |
| 13013 | as_bad_where (fragp->fr_file, fragp->fr_line, |
| 13014 | _("unsupported PC relative reference to different section")); |
| 13015 | |
| 13016 | return 1; |
| 13017 | } |
| 13018 | if (fragp != sym_frag && sym_frag->fr_address == 0) |
| 13019 | /* Assume non-extended on the first relaxation pass. |
| 13020 | The address we have calculated will be bogus if this is |
| 13021 | a forward branch to another frag, as the forward frag |
| 13022 | will have fr_address == 0. */ |
| 13023 | return 0; |
| 13024 | } |
| 13025 | |
| 13026 | /* In this case, we know for sure that the symbol fragment is in |
| 13027 | the same section. If the relax_marker of the symbol fragment |
| 13028 | differs from the relax_marker of this fragment, we have not |
| 13029 | yet adjusted the symbol fragment fr_address. We want to add |
| 13030 | in STRETCH in order to get a better estimate of the address. |
| 13031 | This particularly matters because of the shift bits. */ |
| 13032 | if (stretch != 0 |
| 13033 | && sym_frag->relax_marker != fragp->relax_marker) |
| 13034 | { |
| 13035 | fragS *f; |
| 13036 | |
| 13037 | /* Adjust stretch for any alignment frag. Note that if have |
| 13038 | been expanding the earlier code, the symbol may be |
| 13039 | defined in what appears to be an earlier frag. FIXME: |
| 13040 | This doesn't handle the fr_subtype field, which specifies |
| 13041 | a maximum number of bytes to skip when doing an |
| 13042 | alignment. */ |
| 13043 | for (f = fragp; f != NULL && f != sym_frag; f = f->fr_next) |
| 13044 | { |
| 13045 | if (f->fr_type == rs_align || f->fr_type == rs_align_code) |
| 13046 | { |
| 13047 | if (stretch < 0) |
| 13048 | stretch = - ((- stretch) |
| 13049 | & ~ ((1 << (int) f->fr_offset) - 1)); |
| 13050 | else |
| 13051 | stretch &= ~ ((1 << (int) f->fr_offset) - 1); |
| 13052 | if (stretch == 0) |
| 13053 | break; |
| 13054 | } |
| 13055 | } |
| 13056 | if (f != NULL) |
| 13057 | val += stretch; |
| 13058 | } |
| 13059 | |
| 13060 | addr = fragp->fr_address + fragp->fr_fix; |
| 13061 | |
| 13062 | /* The base address rules are complicated. The base address of |
| 13063 | a branch is the following instruction. The base address of a |
| 13064 | PC relative load or add is the instruction itself, but if it |
| 13065 | is in a delay slot (in which case it can not be extended) use |
| 13066 | the address of the instruction whose delay slot it is in. */ |
| 13067 | if (type == 'p' || type == 'q') |
| 13068 | { |
| 13069 | addr += 2; |
| 13070 | |
| 13071 | /* If we are currently assuming that this frag should be |
| 13072 | extended, then, the current address is two bytes |
| 13073 | higher. */ |
| 13074 | if (RELAX_MIPS16_EXTENDED (fragp->fr_subtype)) |
| 13075 | addr += 2; |
| 13076 | |
| 13077 | /* Ignore the low bit in the target, since it will be set |
| 13078 | for a text label. */ |
| 13079 | if ((val & 1) != 0) |
| 13080 | --val; |
| 13081 | } |
| 13082 | else if (RELAX_MIPS16_JAL_DSLOT (fragp->fr_subtype)) |
| 13083 | addr -= 4; |
| 13084 | else if (RELAX_MIPS16_DSLOT (fragp->fr_subtype)) |
| 13085 | addr -= 2; |
| 13086 | |
| 13087 | val -= addr & ~ ((1 << op->shift) - 1); |
| 13088 | |
| 13089 | /* Branch offsets have an implicit 0 in the lowest bit. */ |
| 13090 | if (type == 'p' || type == 'q') |
| 13091 | val /= 2; |
| 13092 | |
| 13093 | /* If any of the shifted bits are set, we must use an extended |
| 13094 | opcode. If the address depends on the size of this |
| 13095 | instruction, this can lead to a loop, so we arrange to always |
| 13096 | use an extended opcode. We only check this when we are in |
| 13097 | the main relaxation loop, when SEC is NULL. */ |
| 13098 | if ((val & ((1 << op->shift) - 1)) != 0 && sec == NULL) |
| 13099 | { |
| 13100 | fragp->fr_subtype = |
| 13101 | RELAX_MIPS16_MARK_LONG_BRANCH (fragp->fr_subtype); |
| 13102 | return 1; |
| 13103 | } |
| 13104 | |
| 13105 | /* If we are about to mark a frag as extended because the value |
| 13106 | is precisely maxtiny + 1, then there is a chance of an |
| 13107 | infinite loop as in the following code: |
| 13108 | la $4,foo |
| 13109 | .skip 1020 |
| 13110 | .align 2 |
| 13111 | foo: |
| 13112 | In this case when the la is extended, foo is 0x3fc bytes |
| 13113 | away, so the la can be shrunk, but then foo is 0x400 away, so |
| 13114 | the la must be extended. To avoid this loop, we mark the |
| 13115 | frag as extended if it was small, and is about to become |
| 13116 | extended with a value of maxtiny + 1. */ |
| 13117 | if (val == ((maxtiny + 1) << op->shift) |
| 13118 | && ! RELAX_MIPS16_EXTENDED (fragp->fr_subtype) |
| 13119 | && sec == NULL) |
| 13120 | { |
| 13121 | fragp->fr_subtype = |
| 13122 | RELAX_MIPS16_MARK_LONG_BRANCH (fragp->fr_subtype); |
| 13123 | return 1; |
| 13124 | } |
| 13125 | } |
| 13126 | else if (symsec != absolute_section && sec != NULL) |
| 13127 | as_bad_where (fragp->fr_file, fragp->fr_line, _("unsupported relocation")); |
| 13128 | |
| 13129 | if ((val & ((1 << op->shift) - 1)) != 0 |
| 13130 | || val < (mintiny << op->shift) |
| 13131 | || val > (maxtiny << op->shift)) |
| 13132 | return 1; |
| 13133 | else |
| 13134 | return 0; |
| 13135 | } |
| 13136 | |
| 13137 | /* Compute the length of a branch sequence, and adjust the |
| 13138 | RELAX_BRANCH_TOOFAR bit accordingly. If FRAGP is NULL, the |
| 13139 | worst-case length is computed, with UPDATE being used to indicate |
| 13140 | whether an unconditional (-1), branch-likely (+1) or regular (0) |
| 13141 | branch is to be computed. */ |
| 13142 | static int |
| 13143 | relaxed_branch_length (fragS *fragp, asection *sec, int update) |
| 13144 | { |
| 13145 | bfd_boolean toofar; |
| 13146 | int length; |
| 13147 | |
| 13148 | if (fragp |
| 13149 | && S_IS_DEFINED (fragp->fr_symbol) |
| 13150 | && sec == S_GET_SEGMENT (fragp->fr_symbol)) |
| 13151 | { |
| 13152 | addressT addr; |
| 13153 | offsetT val; |
| 13154 | |
| 13155 | val = S_GET_VALUE (fragp->fr_symbol) + fragp->fr_offset; |
| 13156 | |
| 13157 | addr = fragp->fr_address + fragp->fr_fix + 4; |
| 13158 | |
| 13159 | val -= addr; |
| 13160 | |
| 13161 | toofar = val < - (0x8000 << 2) || val >= (0x8000 << 2); |
| 13162 | } |
| 13163 | else if (fragp) |
| 13164 | /* If the symbol is not defined or it's in a different segment, |
| 13165 | assume the user knows what's going on and emit a short |
| 13166 | branch. */ |
| 13167 | toofar = FALSE; |
| 13168 | else |
| 13169 | toofar = TRUE; |
| 13170 | |
| 13171 | if (fragp && update && toofar != RELAX_BRANCH_TOOFAR (fragp->fr_subtype)) |
| 13172 | fragp->fr_subtype |
| 13173 | = RELAX_BRANCH_ENCODE (RELAX_BRANCH_UNCOND (fragp->fr_subtype), |
| 13174 | RELAX_BRANCH_LIKELY (fragp->fr_subtype), |
| 13175 | RELAX_BRANCH_LINK (fragp->fr_subtype), |
| 13176 | toofar); |
| 13177 | |
| 13178 | length = 4; |
| 13179 | if (toofar) |
| 13180 | { |
| 13181 | if (fragp ? RELAX_BRANCH_LIKELY (fragp->fr_subtype) : (update > 0)) |
| 13182 | length += 8; |
| 13183 | |
| 13184 | if (mips_pic != NO_PIC) |
| 13185 | { |
| 13186 | /* Additional space for PIC loading of target address. */ |
| 13187 | length += 8; |
| 13188 | if (mips_opts.isa == ISA_MIPS1) |
| 13189 | /* Additional space for $at-stabilizing nop. */ |
| 13190 | length += 4; |
| 13191 | } |
| 13192 | |
| 13193 | /* If branch is conditional. */ |
| 13194 | if (fragp ? !RELAX_BRANCH_UNCOND (fragp->fr_subtype) : (update >= 0)) |
| 13195 | length += 8; |
| 13196 | } |
| 13197 | |
| 13198 | return length; |
| 13199 | } |
| 13200 | |
| 13201 | /* Estimate the size of a frag before relaxing. Unless this is the |
| 13202 | mips16, we are not really relaxing here, and the final size is |
| 13203 | encoded in the subtype information. For the mips16, we have to |
| 13204 | decide whether we are using an extended opcode or not. */ |
| 13205 | |
| 13206 | int |
| 13207 | md_estimate_size_before_relax (fragS *fragp, asection *segtype) |
| 13208 | { |
| 13209 | int change; |
| 13210 | |
| 13211 | if (RELAX_BRANCH_P (fragp->fr_subtype)) |
| 13212 | { |
| 13213 | |
| 13214 | fragp->fr_var = relaxed_branch_length (fragp, segtype, FALSE); |
| 13215 | |
| 13216 | return fragp->fr_var; |
| 13217 | } |
| 13218 | |
| 13219 | if (RELAX_MIPS16_P (fragp->fr_subtype)) |
| 13220 | /* We don't want to modify the EXTENDED bit here; it might get us |
| 13221 | into infinite loops. We change it only in mips_relax_frag(). */ |
| 13222 | return (RELAX_MIPS16_EXTENDED (fragp->fr_subtype) ? 4 : 2); |
| 13223 | |
| 13224 | if (mips_pic == NO_PIC) |
| 13225 | change = nopic_need_relax (fragp->fr_symbol, 0); |
| 13226 | else if (mips_pic == SVR4_PIC) |
| 13227 | change = pic_need_relax (fragp->fr_symbol, segtype); |
| 13228 | else if (mips_pic == VXWORKS_PIC) |
| 13229 | /* For vxworks, GOT16 relocations never have a corresponding LO16. */ |
| 13230 | change = 0; |
| 13231 | else |
| 13232 | abort (); |
| 13233 | |
| 13234 | if (change) |
| 13235 | { |
| 13236 | fragp->fr_subtype |= RELAX_USE_SECOND; |
| 13237 | return -RELAX_FIRST (fragp->fr_subtype); |
| 13238 | } |
| 13239 | else |
| 13240 | return -RELAX_SECOND (fragp->fr_subtype); |
| 13241 | } |
| 13242 | |
| 13243 | /* This is called to see whether a reloc against a defined symbol |
| 13244 | should be converted into a reloc against a section. */ |
| 13245 | |
| 13246 | int |
| 13247 | mips_fix_adjustable (fixS *fixp) |
| 13248 | { |
| 13249 | /* Don't adjust MIPS16 jump relocations, so we don't have to worry |
| 13250 | about the format of the offset in the .o file. */ |
| 13251 | if (fixp->fx_r_type == BFD_RELOC_MIPS16_JMP) |
| 13252 | return 0; |
| 13253 | |
| 13254 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
| 13255 | || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
| 13256 | return 0; |
| 13257 | |
| 13258 | if (fixp->fx_addsy == NULL) |
| 13259 | return 1; |
| 13260 | |
| 13261 | /* If symbol SYM is in a mergeable section, relocations of the form |
| 13262 | SYM + 0 can usually be made section-relative. The mergeable data |
| 13263 | is then identified by the section offset rather than by the symbol. |
| 13264 | |
| 13265 | However, if we're generating REL LO16 relocations, the offset is split |
| 13266 | between the LO16 and parterning high part relocation. The linker will |
| 13267 | need to recalculate the complete offset in order to correctly identify |
| 13268 | the merge data. |
| 13269 | |
| 13270 | The linker has traditionally not looked for the parterning high part |
| 13271 | relocation, and has thus allowed orphaned R_MIPS_LO16 relocations to be |
| 13272 | placed anywhere. Rather than break backwards compatibility by changing |
| 13273 | this, it seems better not to force the issue, and instead keep the |
| 13274 | original symbol. This will work with either linker behavior. */ |
| 13275 | if ((fixp->fx_r_type == BFD_RELOC_LO16 |
| 13276 | || fixp->fx_r_type == BFD_RELOC_MIPS16_LO16 |
| 13277 | || reloc_needs_lo_p (fixp->fx_r_type)) |
| 13278 | && HAVE_IN_PLACE_ADDENDS |
| 13279 | && (S_GET_SEGMENT (fixp->fx_addsy)->flags & SEC_MERGE) != 0) |
| 13280 | return 0; |
| 13281 | |
| 13282 | #ifdef OBJ_ELF |
| 13283 | /* Don't adjust relocations against mips16 symbols, so that the linker |
| 13284 | can find them if it needs to set up a stub. */ |
| 13285 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour |
| 13286 | && S_GET_OTHER (fixp->fx_addsy) == STO_MIPS16 |
| 13287 | && fixp->fx_subsy == NULL) |
| 13288 | return 0; |
| 13289 | #endif |
| 13290 | |
| 13291 | return 1; |
| 13292 | } |
| 13293 | |
| 13294 | /* Translate internal representation of relocation info to BFD target |
| 13295 | format. */ |
| 13296 | |
| 13297 | arelent ** |
| 13298 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp) |
| 13299 | { |
| 13300 | static arelent *retval[4]; |
| 13301 | arelent *reloc; |
| 13302 | bfd_reloc_code_real_type code; |
| 13303 | |
| 13304 | memset (retval, 0, sizeof(retval)); |
| 13305 | reloc = retval[0] = (arelent *) xcalloc (1, sizeof (arelent)); |
| 13306 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); |
| 13307 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 13308 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 13309 | |
| 13310 | if (fixp->fx_pcrel) |
| 13311 | { |
| 13312 | assert (fixp->fx_r_type == BFD_RELOC_16_PCREL_S2); |
| 13313 | |
| 13314 | /* At this point, fx_addnumber is "symbol offset - pcrel address". |
| 13315 | Relocations want only the symbol offset. */ |
| 13316 | reloc->addend = fixp->fx_addnumber + reloc->address; |
| 13317 | if (OUTPUT_FLAVOR != bfd_target_elf_flavour) |
| 13318 | { |
| 13319 | /* A gruesome hack which is a result of the gruesome gas |
| 13320 | reloc handling. What's worse, for COFF (as opposed to |
| 13321 | ECOFF), we might need yet another copy of reloc->address. |
| 13322 | See bfd_install_relocation. */ |
| 13323 | reloc->addend += reloc->address; |
| 13324 | } |
| 13325 | } |
| 13326 | else |
| 13327 | reloc->addend = fixp->fx_addnumber; |
| 13328 | |
| 13329 | /* Since the old MIPS ELF ABI uses Rel instead of Rela, encode the vtable |
| 13330 | entry to be used in the relocation's section offset. */ |
| 13331 | if (! HAVE_NEWABI && fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
| 13332 | { |
| 13333 | reloc->address = reloc->addend; |
| 13334 | reloc->addend = 0; |
| 13335 | } |
| 13336 | |
| 13337 | code = fixp->fx_r_type; |
| 13338 | |
| 13339 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); |
| 13340 | if (reloc->howto == NULL) |
| 13341 | { |
| 13342 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 13343 | _("Can not represent %s relocation in this object file format"), |
| 13344 | bfd_get_reloc_code_name (code)); |
| 13345 | retval[0] = NULL; |
| 13346 | } |
| 13347 | |
| 13348 | return retval; |
| 13349 | } |
| 13350 | |
| 13351 | /* Relax a machine dependent frag. This returns the amount by which |
| 13352 | the current size of the frag should change. */ |
| 13353 | |
| 13354 | int |
| 13355 | mips_relax_frag (asection *sec, fragS *fragp, long stretch) |
| 13356 | { |
| 13357 | if (RELAX_BRANCH_P (fragp->fr_subtype)) |
| 13358 | { |
| 13359 | offsetT old_var = fragp->fr_var; |
| 13360 | |
| 13361 | fragp->fr_var = relaxed_branch_length (fragp, sec, TRUE); |
| 13362 | |
| 13363 | return fragp->fr_var - old_var; |
| 13364 | } |
| 13365 | |
| 13366 | if (! RELAX_MIPS16_P (fragp->fr_subtype)) |
| 13367 | return 0; |
| 13368 | |
| 13369 | if (mips16_extended_frag (fragp, NULL, stretch)) |
| 13370 | { |
| 13371 | if (RELAX_MIPS16_EXTENDED (fragp->fr_subtype)) |
| 13372 | return 0; |
| 13373 | fragp->fr_subtype = RELAX_MIPS16_MARK_EXTENDED (fragp->fr_subtype); |
| 13374 | return 2; |
| 13375 | } |
| 13376 | else |
| 13377 | { |
| 13378 | if (! RELAX_MIPS16_EXTENDED (fragp->fr_subtype)) |
| 13379 | return 0; |
| 13380 | fragp->fr_subtype = RELAX_MIPS16_CLEAR_EXTENDED (fragp->fr_subtype); |
| 13381 | return -2; |
| 13382 | } |
| 13383 | |
| 13384 | return 0; |
| 13385 | } |
| 13386 | |
| 13387 | /* Convert a machine dependent frag. */ |
| 13388 | |
| 13389 | void |
| 13390 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp) |
| 13391 | { |
| 13392 | if (RELAX_BRANCH_P (fragp->fr_subtype)) |
| 13393 | { |
| 13394 | bfd_byte *buf; |
| 13395 | unsigned long insn; |
| 13396 | expressionS exp; |
| 13397 | fixS *fixp; |
| 13398 | |
| 13399 | buf = (bfd_byte *)fragp->fr_literal + fragp->fr_fix; |
| 13400 | |
| 13401 | if (target_big_endian) |
| 13402 | insn = bfd_getb32 (buf); |
| 13403 | else |
| 13404 | insn = bfd_getl32 (buf); |
| 13405 | |
| 13406 | if (!RELAX_BRANCH_TOOFAR (fragp->fr_subtype)) |
| 13407 | { |
| 13408 | /* We generate a fixup instead of applying it right now |
| 13409 | because, if there are linker relaxations, we're going to |
| 13410 | need the relocations. */ |
| 13411 | exp.X_op = O_symbol; |
| 13412 | exp.X_add_symbol = fragp->fr_symbol; |
| 13413 | exp.X_add_number = fragp->fr_offset; |
| 13414 | |
| 13415 | fixp = fix_new_exp (fragp, buf - (bfd_byte *)fragp->fr_literal, |
| 13416 | 4, &exp, 1, BFD_RELOC_16_PCREL_S2); |
| 13417 | fixp->fx_file = fragp->fr_file; |
| 13418 | fixp->fx_line = fragp->fr_line; |
| 13419 | |
| 13420 | md_number_to_chars ((char *) buf, insn, 4); |
| 13421 | buf += 4; |
| 13422 | } |
| 13423 | else |
| 13424 | { |
| 13425 | int i; |
| 13426 | |
| 13427 | as_warn_where (fragp->fr_file, fragp->fr_line, |
| 13428 | _("relaxed out-of-range branch into a jump")); |
| 13429 | |
| 13430 | if (RELAX_BRANCH_UNCOND (fragp->fr_subtype)) |
| 13431 | goto uncond; |
| 13432 | |
| 13433 | if (!RELAX_BRANCH_LIKELY (fragp->fr_subtype)) |
| 13434 | { |
| 13435 | /* Reverse the branch. */ |
| 13436 | switch ((insn >> 28) & 0xf) |
| 13437 | { |
| 13438 | case 4: |
| 13439 | /* bc[0-3][tf]l? and bc1any[24][ft] instructions can |
| 13440 | have the condition reversed by tweaking a single |
| 13441 | bit, and their opcodes all have 0x4???????. */ |
| 13442 | assert ((insn & 0xf1000000) == 0x41000000); |
| 13443 | insn ^= 0x00010000; |
| 13444 | break; |
| 13445 | |
| 13446 | case 0: |
| 13447 | /* bltz 0x04000000 bgez 0x04010000 |
| 13448 | bltzal 0x04100000 bgezal 0x04110000 */ |
| 13449 | assert ((insn & 0xfc0e0000) == 0x04000000); |
| 13450 | insn ^= 0x00010000; |
| 13451 | break; |
| 13452 | |
| 13453 | case 1: |
| 13454 | /* beq 0x10000000 bne 0x14000000 |
| 13455 | blez 0x18000000 bgtz 0x1c000000 */ |
| 13456 | insn ^= 0x04000000; |
| 13457 | break; |
| 13458 | |
| 13459 | default: |
| 13460 | abort (); |
| 13461 | } |
| 13462 | } |
| 13463 | |
| 13464 | if (RELAX_BRANCH_LINK (fragp->fr_subtype)) |
| 13465 | { |
| 13466 | /* Clear the and-link bit. */ |
| 13467 | assert ((insn & 0xfc1c0000) == 0x04100000); |
| 13468 | |
| 13469 | /* bltzal 0x04100000 bgezal 0x04110000 |
| 13470 | bltzall 0x04120000 bgezall 0x04130000 */ |
| 13471 | insn &= ~0x00100000; |
| 13472 | } |
| 13473 | |
| 13474 | /* Branch over the branch (if the branch was likely) or the |
| 13475 | full jump (not likely case). Compute the offset from the |
| 13476 | current instruction to branch to. */ |
| 13477 | if (RELAX_BRANCH_LIKELY (fragp->fr_subtype)) |
| 13478 | i = 16; |
| 13479 | else |
| 13480 | { |
| 13481 | /* How many bytes in instructions we've already emitted? */ |
| 13482 | i = buf - (bfd_byte *)fragp->fr_literal - fragp->fr_fix; |
| 13483 | /* How many bytes in instructions from here to the end? */ |
| 13484 | i = fragp->fr_var - i; |
| 13485 | } |
| 13486 | /* Convert to instruction count. */ |
| 13487 | i >>= 2; |
| 13488 | /* Branch counts from the next instruction. */ |
| 13489 | i--; |
| 13490 | insn |= i; |
| 13491 | /* Branch over the jump. */ |
| 13492 | md_number_to_chars ((char *) buf, insn, 4); |
| 13493 | buf += 4; |
| 13494 | |
| 13495 | /* Nop */ |
| 13496 | md_number_to_chars ((char *) buf, 0, 4); |
| 13497 | buf += 4; |
| 13498 | |
| 13499 | if (RELAX_BRANCH_LIKELY (fragp->fr_subtype)) |
| 13500 | { |
| 13501 | /* beql $0, $0, 2f */ |
| 13502 | insn = 0x50000000; |
| 13503 | /* Compute the PC offset from the current instruction to |
| 13504 | the end of the variable frag. */ |
| 13505 | /* How many bytes in instructions we've already emitted? */ |
| 13506 | i = buf - (bfd_byte *)fragp->fr_literal - fragp->fr_fix; |
| 13507 | /* How many bytes in instructions from here to the end? */ |
| 13508 | i = fragp->fr_var - i; |
| 13509 | /* Convert to instruction count. */ |
| 13510 | i >>= 2; |
| 13511 | /* Don't decrement i, because we want to branch over the |
| 13512 | delay slot. */ |
| 13513 | |
| 13514 | insn |= i; |
| 13515 | md_number_to_chars ((char *) buf, insn, 4); |
| 13516 | buf += 4; |
| 13517 | |
| 13518 | md_number_to_chars ((char *) buf, 0, 4); |
| 13519 | buf += 4; |
| 13520 | } |
| 13521 | |
| 13522 | uncond: |
| 13523 | if (mips_pic == NO_PIC) |
| 13524 | { |
| 13525 | /* j or jal. */ |
| 13526 | insn = (RELAX_BRANCH_LINK (fragp->fr_subtype) |
| 13527 | ? 0x0c000000 : 0x08000000); |
| 13528 | exp.X_op = O_symbol; |
| 13529 | exp.X_add_symbol = fragp->fr_symbol; |
| 13530 | exp.X_add_number = fragp->fr_offset; |
| 13531 | |
| 13532 | fixp = fix_new_exp (fragp, buf - (bfd_byte *)fragp->fr_literal, |
| 13533 | 4, &exp, 0, BFD_RELOC_MIPS_JMP); |
| 13534 | fixp->fx_file = fragp->fr_file; |
| 13535 | fixp->fx_line = fragp->fr_line; |
| 13536 | |
| 13537 | md_number_to_chars ((char *) buf, insn, 4); |
| 13538 | buf += 4; |
| 13539 | } |
| 13540 | else |
| 13541 | { |
| 13542 | /* lw/ld $at, <sym>($gp) R_MIPS_GOT16 */ |
| 13543 | insn = HAVE_64BIT_ADDRESSES ? 0xdf810000 : 0x8f810000; |
| 13544 | exp.X_op = O_symbol; |
| 13545 | exp.X_add_symbol = fragp->fr_symbol; |
| 13546 | exp.X_add_number = fragp->fr_offset; |
| 13547 | |
| 13548 | if (fragp->fr_offset) |
| 13549 | { |
| 13550 | exp.X_add_symbol = make_expr_symbol (&exp); |
| 13551 | exp.X_add_number = 0; |
| 13552 | } |
| 13553 | |
| 13554 | fixp = fix_new_exp (fragp, buf - (bfd_byte *)fragp->fr_literal, |
| 13555 | 4, &exp, 0, BFD_RELOC_MIPS_GOT16); |
| 13556 | fixp->fx_file = fragp->fr_file; |
| 13557 | fixp->fx_line = fragp->fr_line; |
| 13558 | |
| 13559 | md_number_to_chars ((char *) buf, insn, 4); |
| 13560 | buf += 4; |
| 13561 | |
| 13562 | if (mips_opts.isa == ISA_MIPS1) |
| 13563 | { |
| 13564 | /* nop */ |
| 13565 | md_number_to_chars ((char *) buf, 0, 4); |
| 13566 | buf += 4; |
| 13567 | } |
| 13568 | |
| 13569 | /* d/addiu $at, $at, <sym> R_MIPS_LO16 */ |
| 13570 | insn = HAVE_64BIT_ADDRESSES ? 0x64210000 : 0x24210000; |
| 13571 | |
| 13572 | fixp = fix_new_exp (fragp, buf - (bfd_byte *)fragp->fr_literal, |
| 13573 | 4, &exp, 0, BFD_RELOC_LO16); |
| 13574 | fixp->fx_file = fragp->fr_file; |
| 13575 | fixp->fx_line = fragp->fr_line; |
| 13576 | |
| 13577 | md_number_to_chars ((char *) buf, insn, 4); |
| 13578 | buf += 4; |
| 13579 | |
| 13580 | /* j(al)r $at. */ |
| 13581 | if (RELAX_BRANCH_LINK (fragp->fr_subtype)) |
| 13582 | insn = 0x0020f809; |
| 13583 | else |
| 13584 | insn = 0x00200008; |
| 13585 | |
| 13586 | md_number_to_chars ((char *) buf, insn, 4); |
| 13587 | buf += 4; |
| 13588 | } |
| 13589 | } |
| 13590 | |
| 13591 | assert (buf == (bfd_byte *)fragp->fr_literal |
| 13592 | + fragp->fr_fix + fragp->fr_var); |
| 13593 | |
| 13594 | fragp->fr_fix += fragp->fr_var; |
| 13595 | |
| 13596 | return; |
| 13597 | } |
| 13598 | |
| 13599 | if (RELAX_MIPS16_P (fragp->fr_subtype)) |
| 13600 | { |
| 13601 | int type; |
| 13602 | register const struct mips16_immed_operand *op; |
| 13603 | bfd_boolean small, ext; |
| 13604 | offsetT val; |
| 13605 | bfd_byte *buf; |
| 13606 | unsigned long insn; |
| 13607 | bfd_boolean use_extend; |
| 13608 | unsigned short extend; |
| 13609 | |
| 13610 | type = RELAX_MIPS16_TYPE (fragp->fr_subtype); |
| 13611 | op = mips16_immed_operands; |
| 13612 | while (op->type != type) |
| 13613 | ++op; |
| 13614 | |
| 13615 | if (RELAX_MIPS16_EXTENDED (fragp->fr_subtype)) |
| 13616 | { |
| 13617 | small = FALSE; |
| 13618 | ext = TRUE; |
| 13619 | } |
| 13620 | else |
| 13621 | { |
| 13622 | small = TRUE; |
| 13623 | ext = FALSE; |
| 13624 | } |
| 13625 | |
| 13626 | resolve_symbol_value (fragp->fr_symbol); |
| 13627 | val = S_GET_VALUE (fragp->fr_symbol); |
| 13628 | if (op->pcrel) |
| 13629 | { |
| 13630 | addressT addr; |
| 13631 | |
| 13632 | addr = fragp->fr_address + fragp->fr_fix; |
| 13633 | |
| 13634 | /* The rules for the base address of a PC relative reloc are |
| 13635 | complicated; see mips16_extended_frag. */ |
| 13636 | if (type == 'p' || type == 'q') |
| 13637 | { |
| 13638 | addr += 2; |
| 13639 | if (ext) |
| 13640 | addr += 2; |
| 13641 | /* Ignore the low bit in the target, since it will be |
| 13642 | set for a text label. */ |
| 13643 | if ((val & 1) != 0) |
| 13644 | --val; |
| 13645 | } |
| 13646 | else if (RELAX_MIPS16_JAL_DSLOT (fragp->fr_subtype)) |
| 13647 | addr -= 4; |
| 13648 | else if (RELAX_MIPS16_DSLOT (fragp->fr_subtype)) |
| 13649 | addr -= 2; |
| 13650 | |
| 13651 | addr &= ~ (addressT) ((1 << op->shift) - 1); |
| 13652 | val -= addr; |
| 13653 | |
| 13654 | /* Make sure the section winds up with the alignment we have |
| 13655 | assumed. */ |
| 13656 | if (op->shift > 0) |
| 13657 | record_alignment (asec, op->shift); |
| 13658 | } |
| 13659 | |
| 13660 | if (ext |
| 13661 | && (RELAX_MIPS16_JAL_DSLOT (fragp->fr_subtype) |
| 13662 | || RELAX_MIPS16_DSLOT (fragp->fr_subtype))) |
| 13663 | as_warn_where (fragp->fr_file, fragp->fr_line, |
| 13664 | _("extended instruction in delay slot")); |
| 13665 | |
| 13666 | buf = (bfd_byte *) (fragp->fr_literal + fragp->fr_fix); |
| 13667 | |
| 13668 | if (target_big_endian) |
| 13669 | insn = bfd_getb16 (buf); |
| 13670 | else |
| 13671 | insn = bfd_getl16 (buf); |
| 13672 | |
| 13673 | mips16_immed (fragp->fr_file, fragp->fr_line, type, val, |
| 13674 | RELAX_MIPS16_USER_EXT (fragp->fr_subtype), |
| 13675 | small, ext, &insn, &use_extend, &extend); |
| 13676 | |
| 13677 | if (use_extend) |
| 13678 | { |
| 13679 | md_number_to_chars ((char *) buf, 0xf000 | extend, 2); |
| 13680 | fragp->fr_fix += 2; |
| 13681 | buf += 2; |
| 13682 | } |
| 13683 | |
| 13684 | md_number_to_chars ((char *) buf, insn, 2); |
| 13685 | fragp->fr_fix += 2; |
| 13686 | buf += 2; |
| 13687 | } |
| 13688 | else |
| 13689 | { |
| 13690 | int first, second; |
| 13691 | fixS *fixp; |
| 13692 | |
| 13693 | first = RELAX_FIRST (fragp->fr_subtype); |
| 13694 | second = RELAX_SECOND (fragp->fr_subtype); |
| 13695 | fixp = (fixS *) fragp->fr_opcode; |
| 13696 | |
| 13697 | /* Possibly emit a warning if we've chosen the longer option. */ |
| 13698 | if (((fragp->fr_subtype & RELAX_USE_SECOND) != 0) |
| 13699 | == ((fragp->fr_subtype & RELAX_SECOND_LONGER) != 0)) |
| 13700 | { |
| 13701 | const char *msg = macro_warning (fragp->fr_subtype); |
| 13702 | if (msg != 0) |
| 13703 | as_warn_where (fragp->fr_file, fragp->fr_line, msg); |
| 13704 | } |
| 13705 | |
| 13706 | /* Go through all the fixups for the first sequence. Disable them |
| 13707 | (by marking them as done) if we're going to use the second |
| 13708 | sequence instead. */ |
| 13709 | while (fixp |
| 13710 | && fixp->fx_frag == fragp |
| 13711 | && fixp->fx_where < fragp->fr_fix - second) |
| 13712 | { |
| 13713 | if (fragp->fr_subtype & RELAX_USE_SECOND) |
| 13714 | fixp->fx_done = 1; |
| 13715 | fixp = fixp->fx_next; |
| 13716 | } |
| 13717 | |
| 13718 | /* Go through the fixups for the second sequence. Disable them if |
| 13719 | we're going to use the first sequence, otherwise adjust their |
| 13720 | addresses to account for the relaxation. */ |
| 13721 | while (fixp && fixp->fx_frag == fragp) |
| 13722 | { |
| 13723 | if (fragp->fr_subtype & RELAX_USE_SECOND) |
| 13724 | fixp->fx_where -= first; |
| 13725 | else |
| 13726 | fixp->fx_done = 1; |
| 13727 | fixp = fixp->fx_next; |
| 13728 | } |
| 13729 | |
| 13730 | /* Now modify the frag contents. */ |
| 13731 | if (fragp->fr_subtype & RELAX_USE_SECOND) |
| 13732 | { |
| 13733 | char *start; |
| 13734 | |
| 13735 | start = fragp->fr_literal + fragp->fr_fix - first - second; |
| 13736 | memmove (start, start + first, second); |
| 13737 | fragp->fr_fix -= first; |
| 13738 | } |
| 13739 | else |
| 13740 | fragp->fr_fix -= second; |
| 13741 | } |
| 13742 | } |
| 13743 | |
| 13744 | #ifdef OBJ_ELF |
| 13745 | |
| 13746 | /* This function is called after the relocs have been generated. |
| 13747 | We've been storing mips16 text labels as odd. Here we convert them |
| 13748 | back to even for the convenience of the debugger. */ |
| 13749 | |
| 13750 | void |
| 13751 | mips_frob_file_after_relocs (void) |
| 13752 | { |
| 13753 | asymbol **syms; |
| 13754 | unsigned int count, i; |
| 13755 | |
| 13756 | if (OUTPUT_FLAVOR != bfd_target_elf_flavour) |
| 13757 | return; |
| 13758 | |
| 13759 | syms = bfd_get_outsymbols (stdoutput); |
| 13760 | count = bfd_get_symcount (stdoutput); |
| 13761 | for (i = 0; i < count; i++, syms++) |
| 13762 | { |
| 13763 | if (elf_symbol (*syms)->internal_elf_sym.st_other == STO_MIPS16 |
| 13764 | && ((*syms)->value & 1) != 0) |
| 13765 | { |
| 13766 | (*syms)->value &= ~1; |
| 13767 | /* If the symbol has an odd size, it was probably computed |
| 13768 | incorrectly, so adjust that as well. */ |
| 13769 | if ((elf_symbol (*syms)->internal_elf_sym.st_size & 1) != 0) |
| 13770 | ++elf_symbol (*syms)->internal_elf_sym.st_size; |
| 13771 | } |
| 13772 | } |
| 13773 | } |
| 13774 | |
| 13775 | #endif |
| 13776 | |
| 13777 | /* This function is called whenever a label is defined. It is used |
| 13778 | when handling branch delays; if a branch has a label, we assume we |
| 13779 | can not move it. */ |
| 13780 | |
| 13781 | void |
| 13782 | mips_define_label (symbolS *sym) |
| 13783 | { |
| 13784 | struct insn_label_list *l; |
| 13785 | |
| 13786 | if (free_insn_labels == NULL) |
| 13787 | l = (struct insn_label_list *) xmalloc (sizeof *l); |
| 13788 | else |
| 13789 | { |
| 13790 | l = free_insn_labels; |
| 13791 | free_insn_labels = l->next; |
| 13792 | } |
| 13793 | |
| 13794 | l->label = sym; |
| 13795 | l->next = insn_labels; |
| 13796 | insn_labels = l; |
| 13797 | |
| 13798 | #ifdef OBJ_ELF |
| 13799 | dwarf2_emit_label (sym); |
| 13800 | #endif |
| 13801 | } |
| 13802 | \f |
| 13803 | #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) |
| 13804 | |
| 13805 | /* Some special processing for a MIPS ELF file. */ |
| 13806 | |
| 13807 | void |
| 13808 | mips_elf_final_processing (void) |
| 13809 | { |
| 13810 | /* Write out the register information. */ |
| 13811 | if (mips_abi != N64_ABI) |
| 13812 | { |
| 13813 | Elf32_RegInfo s; |
| 13814 | |
| 13815 | s.ri_gprmask = mips_gprmask; |
| 13816 | s.ri_cprmask[0] = mips_cprmask[0]; |
| 13817 | s.ri_cprmask[1] = mips_cprmask[1]; |
| 13818 | s.ri_cprmask[2] = mips_cprmask[2]; |
| 13819 | s.ri_cprmask[3] = mips_cprmask[3]; |
| 13820 | /* The gp_value field is set by the MIPS ELF backend. */ |
| 13821 | |
| 13822 | bfd_mips_elf32_swap_reginfo_out (stdoutput, &s, |
| 13823 | ((Elf32_External_RegInfo *) |
| 13824 | mips_regmask_frag)); |
| 13825 | } |
| 13826 | else |
| 13827 | { |
| 13828 | Elf64_Internal_RegInfo s; |
| 13829 | |
| 13830 | s.ri_gprmask = mips_gprmask; |
| 13831 | s.ri_pad = 0; |
| 13832 | s.ri_cprmask[0] = mips_cprmask[0]; |
| 13833 | s.ri_cprmask[1] = mips_cprmask[1]; |
| 13834 | s.ri_cprmask[2] = mips_cprmask[2]; |
| 13835 | s.ri_cprmask[3] = mips_cprmask[3]; |
| 13836 | /* The gp_value field is set by the MIPS ELF backend. */ |
| 13837 | |
| 13838 | bfd_mips_elf64_swap_reginfo_out (stdoutput, &s, |
| 13839 | ((Elf64_External_RegInfo *) |
| 13840 | mips_regmask_frag)); |
| 13841 | } |
| 13842 | |
| 13843 | /* Set the MIPS ELF flag bits. FIXME: There should probably be some |
| 13844 | sort of BFD interface for this. */ |
| 13845 | if (mips_any_noreorder) |
| 13846 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_NOREORDER; |
| 13847 | if (mips_pic != NO_PIC) |
| 13848 | { |
| 13849 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_PIC; |
| 13850 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_CPIC; |
| 13851 | } |
| 13852 | if (mips_abicalls) |
| 13853 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_CPIC; |
| 13854 | |
| 13855 | /* Set MIPS ELF flags for ASEs. */ |
| 13856 | /* We may need to define a new flag for DSP ASE, and set this flag when |
| 13857 | file_ase_dsp is true. */ |
| 13858 | /* We may need to define a new flag for MT ASE, and set this flag when |
| 13859 | file_ase_mt is true. */ |
| 13860 | if (file_ase_mips16) |
| 13861 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_ARCH_ASE_M16; |
| 13862 | #if 0 /* XXX FIXME */ |
| 13863 | if (file_ase_mips3d) |
| 13864 | elf_elfheader (stdoutput)->e_flags |= ???; |
| 13865 | #endif |
| 13866 | if (file_ase_mdmx) |
| 13867 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_ARCH_ASE_MDMX; |
| 13868 | |
| 13869 | /* Set the MIPS ELF ABI flags. */ |
| 13870 | if (mips_abi == O32_ABI && USE_E_MIPS_ABI_O32) |
| 13871 | elf_elfheader (stdoutput)->e_flags |= E_MIPS_ABI_O32; |
| 13872 | else if (mips_abi == O64_ABI) |
| 13873 | elf_elfheader (stdoutput)->e_flags |= E_MIPS_ABI_O64; |
| 13874 | else if (mips_abi == EABI_ABI) |
| 13875 | { |
| 13876 | if (!file_mips_gp32) |
| 13877 | elf_elfheader (stdoutput)->e_flags |= E_MIPS_ABI_EABI64; |
| 13878 | else |
| 13879 | elf_elfheader (stdoutput)->e_flags |= E_MIPS_ABI_EABI32; |
| 13880 | } |
| 13881 | else if (mips_abi == N32_ABI) |
| 13882 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_ABI2; |
| 13883 | |
| 13884 | /* Nothing to do for N64_ABI. */ |
| 13885 | |
| 13886 | if (mips_32bitmode) |
| 13887 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_32BITMODE; |
| 13888 | } |
| 13889 | |
| 13890 | #endif /* OBJ_ELF || OBJ_MAYBE_ELF */ |
| 13891 | \f |
| 13892 | typedef struct proc { |
| 13893 | symbolS *func_sym; |
| 13894 | symbolS *func_end_sym; |
| 13895 | unsigned long reg_mask; |
| 13896 | unsigned long reg_offset; |
| 13897 | unsigned long fpreg_mask; |
| 13898 | unsigned long fpreg_offset; |
| 13899 | unsigned long frame_offset; |
| 13900 | unsigned long frame_reg; |
| 13901 | unsigned long pc_reg; |
| 13902 | } procS; |
| 13903 | |
| 13904 | static procS cur_proc; |
| 13905 | static procS *cur_proc_ptr; |
| 13906 | static int numprocs; |
| 13907 | |
| 13908 | /* Fill in an rs_align_code fragment. */ |
| 13909 | |
| 13910 | void |
| 13911 | mips_handle_align (fragS *fragp) |
| 13912 | { |
| 13913 | if (fragp->fr_type != rs_align_code) |
| 13914 | return; |
| 13915 | |
| 13916 | if (mips_opts.mips16) |
| 13917 | { |
| 13918 | static const unsigned char be_nop[] = { 0x65, 0x00 }; |
| 13919 | static const unsigned char le_nop[] = { 0x00, 0x65 }; |
| 13920 | |
| 13921 | int bytes; |
| 13922 | char *p; |
| 13923 | |
| 13924 | bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix; |
| 13925 | p = fragp->fr_literal + fragp->fr_fix; |
| 13926 | |
| 13927 | if (bytes & 1) |
| 13928 | { |
| 13929 | *p++ = 0; |
| 13930 | fragp->fr_fix++; |
| 13931 | } |
| 13932 | |
| 13933 | memcpy (p, (target_big_endian ? be_nop : le_nop), 2); |
| 13934 | fragp->fr_var = 2; |
| 13935 | } |
| 13936 | |
| 13937 | /* For mips32, a nop is a zero, which we trivially get by doing nothing. */ |
| 13938 | } |
| 13939 | |
| 13940 | static void |
| 13941 | md_obj_begin (void) |
| 13942 | { |
| 13943 | } |
| 13944 | |
| 13945 | static void |
| 13946 | md_obj_end (void) |
| 13947 | { |
| 13948 | /* check for premature end, nesting errors, etc */ |
| 13949 | if (cur_proc_ptr) |
| 13950 | as_warn (_("missing .end at end of assembly")); |
| 13951 | } |
| 13952 | |
| 13953 | static long |
| 13954 | get_number (void) |
| 13955 | { |
| 13956 | int negative = 0; |
| 13957 | long val = 0; |
| 13958 | |
| 13959 | if (*input_line_pointer == '-') |
| 13960 | { |
| 13961 | ++input_line_pointer; |
| 13962 | negative = 1; |
| 13963 | } |
| 13964 | if (!ISDIGIT (*input_line_pointer)) |
| 13965 | as_bad (_("expected simple number")); |
| 13966 | if (input_line_pointer[0] == '0') |
| 13967 | { |
| 13968 | if (input_line_pointer[1] == 'x') |
| 13969 | { |
| 13970 | input_line_pointer += 2; |
| 13971 | while (ISXDIGIT (*input_line_pointer)) |
| 13972 | { |
| 13973 | val <<= 4; |
| 13974 | val |= hex_value (*input_line_pointer++); |
| 13975 | } |
| 13976 | return negative ? -val : val; |
| 13977 | } |
| 13978 | else |
| 13979 | { |
| 13980 | ++input_line_pointer; |
| 13981 | while (ISDIGIT (*input_line_pointer)) |
| 13982 | { |
| 13983 | val <<= 3; |
| 13984 | val |= *input_line_pointer++ - '0'; |
| 13985 | } |
| 13986 | return negative ? -val : val; |
| 13987 | } |
| 13988 | } |
| 13989 | if (!ISDIGIT (*input_line_pointer)) |
| 13990 | { |
| 13991 | printf (_(" *input_line_pointer == '%c' 0x%02x\n"), |
| 13992 | *input_line_pointer, *input_line_pointer); |
| 13993 | as_warn (_("invalid number")); |
| 13994 | return -1; |
| 13995 | } |
| 13996 | while (ISDIGIT (*input_line_pointer)) |
| 13997 | { |
| 13998 | val *= 10; |
| 13999 | val += *input_line_pointer++ - '0'; |
| 14000 | } |
| 14001 | return negative ? -val : val; |
| 14002 | } |
| 14003 | |
| 14004 | /* The .file directive; just like the usual .file directive, but there |
| 14005 | is an initial number which is the ECOFF file index. In the non-ECOFF |
| 14006 | case .file implies DWARF-2. */ |
| 14007 | |
| 14008 | static void |
| 14009 | s_mips_file (int x ATTRIBUTE_UNUSED) |
| 14010 | { |
| 14011 | static int first_file_directive = 0; |
| 14012 | |
| 14013 | if (ECOFF_DEBUGGING) |
| 14014 | { |
| 14015 | get_number (); |
| 14016 | s_app_file (0); |
| 14017 | } |
| 14018 | else |
| 14019 | { |
| 14020 | char *filename; |
| 14021 | |
| 14022 | filename = dwarf2_directive_file (0); |
| 14023 | |
| 14024 | /* Versions of GCC up to 3.1 start files with a ".file" |
| 14025 | directive even for stabs output. Make sure that this |
| 14026 | ".file" is handled. Note that you need a version of GCC |
| 14027 | after 3.1 in order to support DWARF-2 on MIPS. */ |
| 14028 | if (filename != NULL && ! first_file_directive) |
| 14029 | { |
| 14030 | (void) new_logical_line (filename, -1); |
| 14031 | s_app_file_string (filename, 0); |
| 14032 | } |
| 14033 | first_file_directive = 1; |
| 14034 | } |
| 14035 | } |
| 14036 | |
| 14037 | /* The .loc directive, implying DWARF-2. */ |
| 14038 | |
| 14039 | static void |
| 14040 | s_mips_loc (int x ATTRIBUTE_UNUSED) |
| 14041 | { |
| 14042 | if (!ECOFF_DEBUGGING) |
| 14043 | dwarf2_directive_loc (0); |
| 14044 | } |
| 14045 | |
| 14046 | /* The .end directive. */ |
| 14047 | |
| 14048 | static void |
| 14049 | s_mips_end (int x ATTRIBUTE_UNUSED) |
| 14050 | { |
| 14051 | symbolS *p; |
| 14052 | |
| 14053 | /* Following functions need their own .frame and .cprestore directives. */ |
| 14054 | mips_frame_reg_valid = 0; |
| 14055 | mips_cprestore_valid = 0; |
| 14056 | |
| 14057 | if (!is_end_of_line[(unsigned char) *input_line_pointer]) |
| 14058 | { |
| 14059 | p = get_symbol (); |
| 14060 | demand_empty_rest_of_line (); |
| 14061 | } |
| 14062 | else |
| 14063 | p = NULL; |
| 14064 | |
| 14065 | if ((bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE) == 0) |
| 14066 | as_warn (_(".end not in text section")); |
| 14067 | |
| 14068 | if (!cur_proc_ptr) |
| 14069 | { |
| 14070 | as_warn (_(".end directive without a preceding .ent directive.")); |
| 14071 | demand_empty_rest_of_line (); |
| 14072 | return; |
| 14073 | } |
| 14074 | |
| 14075 | if (p != NULL) |
| 14076 | { |
| 14077 | assert (S_GET_NAME (p)); |
| 14078 | if (strcmp (S_GET_NAME (p), S_GET_NAME (cur_proc_ptr->func_sym))) |
| 14079 | as_warn (_(".end symbol does not match .ent symbol.")); |
| 14080 | |
| 14081 | if (debug_type == DEBUG_STABS) |
| 14082 | stabs_generate_asm_endfunc (S_GET_NAME (p), |
| 14083 | S_GET_NAME (p)); |
| 14084 | } |
| 14085 | else |
| 14086 | as_warn (_(".end directive missing or unknown symbol")); |
| 14087 | |
| 14088 | #ifdef OBJ_ELF |
| 14089 | /* Create an expression to calculate the size of the function. */ |
| 14090 | if (p && cur_proc_ptr) |
| 14091 | { |
| 14092 | OBJ_SYMFIELD_TYPE *obj = symbol_get_obj (p); |
| 14093 | expressionS *exp = xmalloc (sizeof (expressionS)); |
| 14094 | |
| 14095 | obj->size = exp; |
| 14096 | exp->X_op = O_subtract; |
| 14097 | exp->X_add_symbol = symbol_temp_new_now (); |
| 14098 | exp->X_op_symbol = p; |
| 14099 | exp->X_add_number = 0; |
| 14100 | |
| 14101 | cur_proc_ptr->func_end_sym = exp->X_add_symbol; |
| 14102 | } |
| 14103 | |
| 14104 | /* Generate a .pdr section. */ |
| 14105 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour && ! ECOFF_DEBUGGING |
| 14106 | && mips_flag_pdr) |
| 14107 | { |
| 14108 | segT saved_seg = now_seg; |
| 14109 | subsegT saved_subseg = now_subseg; |
| 14110 | valueT dot; |
| 14111 | expressionS exp; |
| 14112 | char *fragp; |
| 14113 | |
| 14114 | dot = frag_now_fix (); |
| 14115 | |
| 14116 | #ifdef md_flush_pending_output |
| 14117 | md_flush_pending_output (); |
| 14118 | #endif |
| 14119 | |
| 14120 | assert (pdr_seg); |
| 14121 | subseg_set (pdr_seg, 0); |
| 14122 | |
| 14123 | /* Write the symbol. */ |
| 14124 | exp.X_op = O_symbol; |
| 14125 | exp.X_add_symbol = p; |
| 14126 | exp.X_add_number = 0; |
| 14127 | emit_expr (&exp, 4); |
| 14128 | |
| 14129 | fragp = frag_more (7 * 4); |
| 14130 | |
| 14131 | md_number_to_chars (fragp, cur_proc_ptr->reg_mask, 4); |
| 14132 | md_number_to_chars (fragp + 4, cur_proc_ptr->reg_offset, 4); |
| 14133 | md_number_to_chars (fragp + 8, cur_proc_ptr->fpreg_mask, 4); |
| 14134 | md_number_to_chars (fragp + 12, cur_proc_ptr->fpreg_offset, 4); |
| 14135 | md_number_to_chars (fragp + 16, cur_proc_ptr->frame_offset, 4); |
| 14136 | md_number_to_chars (fragp + 20, cur_proc_ptr->frame_reg, 4); |
| 14137 | md_number_to_chars (fragp + 24, cur_proc_ptr->pc_reg, 4); |
| 14138 | |
| 14139 | subseg_set (saved_seg, saved_subseg); |
| 14140 | } |
| 14141 | #endif /* OBJ_ELF */ |
| 14142 | |
| 14143 | cur_proc_ptr = NULL; |
| 14144 | } |
| 14145 | |
| 14146 | /* The .aent and .ent directives. */ |
| 14147 | |
| 14148 | static void |
| 14149 | s_mips_ent (int aent) |
| 14150 | { |
| 14151 | symbolS *symbolP; |
| 14152 | |
| 14153 | symbolP = get_symbol (); |
| 14154 | if (*input_line_pointer == ',') |
| 14155 | ++input_line_pointer; |
| 14156 | SKIP_WHITESPACE (); |
| 14157 | if (ISDIGIT (*input_line_pointer) |
| 14158 | || *input_line_pointer == '-') |
| 14159 | get_number (); |
| 14160 | |
| 14161 | if ((bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE) == 0) |
| 14162 | as_warn (_(".ent or .aent not in text section.")); |
| 14163 | |
| 14164 | if (!aent && cur_proc_ptr) |
| 14165 | as_warn (_("missing .end")); |
| 14166 | |
| 14167 | if (!aent) |
| 14168 | { |
| 14169 | /* This function needs its own .frame and .cprestore directives. */ |
| 14170 | mips_frame_reg_valid = 0; |
| 14171 | mips_cprestore_valid = 0; |
| 14172 | |
| 14173 | cur_proc_ptr = &cur_proc; |
| 14174 | memset (cur_proc_ptr, '\0', sizeof (procS)); |
| 14175 | |
| 14176 | cur_proc_ptr->func_sym = symbolP; |
| 14177 | |
| 14178 | symbol_get_bfdsym (symbolP)->flags |= BSF_FUNCTION; |
| 14179 | |
| 14180 | ++numprocs; |
| 14181 | |
| 14182 | if (debug_type == DEBUG_STABS) |
| 14183 | stabs_generate_asm_func (S_GET_NAME (symbolP), |
| 14184 | S_GET_NAME (symbolP)); |
| 14185 | } |
| 14186 | |
| 14187 | demand_empty_rest_of_line (); |
| 14188 | } |
| 14189 | |
| 14190 | /* The .frame directive. If the mdebug section is present (IRIX 5 native) |
| 14191 | then ecoff.c (ecoff_directive_frame) is used. For embedded targets, |
| 14192 | s_mips_frame is used so that we can set the PDR information correctly. |
| 14193 | We can't use the ecoff routines because they make reference to the ecoff |
| 14194 | symbol table (in the mdebug section). */ |
| 14195 | |
| 14196 | static void |
| 14197 | s_mips_frame (int ignore ATTRIBUTE_UNUSED) |
| 14198 | { |
| 14199 | #ifdef OBJ_ELF |
| 14200 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour && ! ECOFF_DEBUGGING) |
| 14201 | { |
| 14202 | long val; |
| 14203 | |
| 14204 | if (cur_proc_ptr == (procS *) NULL) |
| 14205 | { |
| 14206 | as_warn (_(".frame outside of .ent")); |
| 14207 | demand_empty_rest_of_line (); |
| 14208 | return; |
| 14209 | } |
| 14210 | |
| 14211 | cur_proc_ptr->frame_reg = tc_get_register (1); |
| 14212 | |
| 14213 | SKIP_WHITESPACE (); |
| 14214 | if (*input_line_pointer++ != ',' |
| 14215 | || get_absolute_expression_and_terminator (&val) != ',') |
| 14216 | { |
| 14217 | as_warn (_("Bad .frame directive")); |
| 14218 | --input_line_pointer; |
| 14219 | demand_empty_rest_of_line (); |
| 14220 | return; |
| 14221 | } |
| 14222 | |
| 14223 | cur_proc_ptr->frame_offset = val; |
| 14224 | cur_proc_ptr->pc_reg = tc_get_register (0); |
| 14225 | |
| 14226 | demand_empty_rest_of_line (); |
| 14227 | } |
| 14228 | else |
| 14229 | #endif /* OBJ_ELF */ |
| 14230 | s_ignore (ignore); |
| 14231 | } |
| 14232 | |
| 14233 | /* The .fmask and .mask directives. If the mdebug section is present |
| 14234 | (IRIX 5 native) then ecoff.c (ecoff_directive_mask) is used. For |
| 14235 | embedded targets, s_mips_mask is used so that we can set the PDR |
| 14236 | information correctly. We can't use the ecoff routines because they |
| 14237 | make reference to the ecoff symbol table (in the mdebug section). */ |
| 14238 | |
| 14239 | static void |
| 14240 | s_mips_mask (int reg_type) |
| 14241 | { |
| 14242 | #ifdef OBJ_ELF |
| 14243 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour && ! ECOFF_DEBUGGING) |
| 14244 | { |
| 14245 | long mask, off; |
| 14246 | |
| 14247 | if (cur_proc_ptr == (procS *) NULL) |
| 14248 | { |
| 14249 | as_warn (_(".mask/.fmask outside of .ent")); |
| 14250 | demand_empty_rest_of_line (); |
| 14251 | return; |
| 14252 | } |
| 14253 | |
| 14254 | if (get_absolute_expression_and_terminator (&mask) != ',') |
| 14255 | { |
| 14256 | as_warn (_("Bad .mask/.fmask directive")); |
| 14257 | --input_line_pointer; |
| 14258 | demand_empty_rest_of_line (); |
| 14259 | return; |
| 14260 | } |
| 14261 | |
| 14262 | off = get_absolute_expression (); |
| 14263 | |
| 14264 | if (reg_type == 'F') |
| 14265 | { |
| 14266 | cur_proc_ptr->fpreg_mask = mask; |
| 14267 | cur_proc_ptr->fpreg_offset = off; |
| 14268 | } |
| 14269 | else |
| 14270 | { |
| 14271 | cur_proc_ptr->reg_mask = mask; |
| 14272 | cur_proc_ptr->reg_offset = off; |
| 14273 | } |
| 14274 | |
| 14275 | demand_empty_rest_of_line (); |
| 14276 | } |
| 14277 | else |
| 14278 | #endif /* OBJ_ELF */ |
| 14279 | s_ignore (reg_type); |
| 14280 | } |
| 14281 | |
| 14282 | /* A table describing all the processors gas knows about. Names are |
| 14283 | matched in the order listed. |
| 14284 | |
| 14285 | To ease comparison, please keep this table in the same order as |
| 14286 | gcc's mips_cpu_info_table[]. */ |
| 14287 | static const struct mips_cpu_info mips_cpu_info_table[] = |
| 14288 | { |
| 14289 | /* Entries for generic ISAs */ |
| 14290 | { "mips1", 1, ISA_MIPS1, CPU_R3000 }, |
| 14291 | { "mips2", 1, ISA_MIPS2, CPU_R6000 }, |
| 14292 | { "mips3", 1, ISA_MIPS3, CPU_R4000 }, |
| 14293 | { "mips4", 1, ISA_MIPS4, CPU_R8000 }, |
| 14294 | { "mips5", 1, ISA_MIPS5, CPU_MIPS5 }, |
| 14295 | { "mips32", 1, ISA_MIPS32, CPU_MIPS32 }, |
| 14296 | { "mips32r2", 1, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 14297 | { "mips64", 1, ISA_MIPS64, CPU_MIPS64 }, |
| 14298 | { "mips64r2", 1, ISA_MIPS64R2, CPU_MIPS64R2 }, |
| 14299 | |
| 14300 | /* MIPS I */ |
| 14301 | { "r3000", 0, ISA_MIPS1, CPU_R3000 }, |
| 14302 | { "r2000", 0, ISA_MIPS1, CPU_R3000 }, |
| 14303 | { "r3900", 0, ISA_MIPS1, CPU_R3900 }, |
| 14304 | |
| 14305 | /* MIPS II */ |
| 14306 | { "r6000", 0, ISA_MIPS2, CPU_R6000 }, |
| 14307 | |
| 14308 | /* MIPS III */ |
| 14309 | { "r4000", 0, ISA_MIPS3, CPU_R4000 }, |
| 14310 | { "r4010", 0, ISA_MIPS2, CPU_R4010 }, |
| 14311 | { "vr4100", 0, ISA_MIPS3, CPU_VR4100 }, |
| 14312 | { "vr4111", 0, ISA_MIPS3, CPU_R4111 }, |
| 14313 | { "vr4120", 0, ISA_MIPS3, CPU_VR4120 }, |
| 14314 | { "vr4130", 0, ISA_MIPS3, CPU_VR4120 }, |
| 14315 | { "vr4181", 0, ISA_MIPS3, CPU_R4111 }, |
| 14316 | { "vr4300", 0, ISA_MIPS3, CPU_R4300 }, |
| 14317 | { "r4400", 0, ISA_MIPS3, CPU_R4400 }, |
| 14318 | { "r4600", 0, ISA_MIPS3, CPU_R4600 }, |
| 14319 | { "orion", 0, ISA_MIPS3, CPU_R4600 }, |
| 14320 | { "r4650", 0, ISA_MIPS3, CPU_R4650 }, |
| 14321 | |
| 14322 | /* MIPS IV */ |
| 14323 | { "r8000", 0, ISA_MIPS4, CPU_R8000 }, |
| 14324 | { "r10000", 0, ISA_MIPS4, CPU_R10000 }, |
| 14325 | { "r12000", 0, ISA_MIPS4, CPU_R12000 }, |
| 14326 | { "vr5000", 0, ISA_MIPS4, CPU_R5000 }, |
| 14327 | { "vr5400", 0, ISA_MIPS4, CPU_VR5400 }, |
| 14328 | { "vr5500", 0, ISA_MIPS4, CPU_VR5500 }, |
| 14329 | { "rm5200", 0, ISA_MIPS4, CPU_R5000 }, |
| 14330 | { "rm5230", 0, ISA_MIPS4, CPU_R5000 }, |
| 14331 | { "rm5231", 0, ISA_MIPS4, CPU_R5000 }, |
| 14332 | { "rm5261", 0, ISA_MIPS4, CPU_R5000 }, |
| 14333 | { "rm5721", 0, ISA_MIPS4, CPU_R5000 }, |
| 14334 | { "rm7000", 0, ISA_MIPS4, CPU_RM7000 }, |
| 14335 | { "rm9000", 0, ISA_MIPS4, CPU_RM9000 }, |
| 14336 | |
| 14337 | /* MIPS 32 */ |
| 14338 | { "4kc", 0, ISA_MIPS32, CPU_MIPS32 }, |
| 14339 | { "4km", 0, ISA_MIPS32, CPU_MIPS32 }, |
| 14340 | { "4kp", 0, ISA_MIPS32, CPU_MIPS32 }, |
| 14341 | |
| 14342 | /* MIPS32 Release 2 */ |
| 14343 | { "m4k", 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 14344 | { "24k", 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 14345 | { "24kc", 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 14346 | { "24kf", 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 14347 | { "24kx", 0, ISA_MIPS32R2, CPU_MIPS32R2 }, |
| 14348 | |
| 14349 | /* MIPS 64 */ |
| 14350 | { "5kc", 0, ISA_MIPS64, CPU_MIPS64 }, |
| 14351 | { "5kf", 0, ISA_MIPS64, CPU_MIPS64 }, |
| 14352 | { "20kc", 0, ISA_MIPS64, CPU_MIPS64 }, |
| 14353 | |
| 14354 | /* Broadcom SB-1 CPU core */ |
| 14355 | { "sb1", 0, ISA_MIPS64, CPU_SB1 }, |
| 14356 | |
| 14357 | /* End marker */ |
| 14358 | { NULL, 0, 0, 0 } |
| 14359 | }; |
| 14360 | |
| 14361 | |
| 14362 | /* Return true if GIVEN is the same as CANONICAL, or if it is CANONICAL |
| 14363 | with a final "000" replaced by "k". Ignore case. |
| 14364 | |
| 14365 | Note: this function is shared between GCC and GAS. */ |
| 14366 | |
| 14367 | static bfd_boolean |
| 14368 | mips_strict_matching_cpu_name_p (const char *canonical, const char *given) |
| 14369 | { |
| 14370 | while (*given != 0 && TOLOWER (*given) == TOLOWER (*canonical)) |
| 14371 | given++, canonical++; |
| 14372 | |
| 14373 | return ((*given == 0 && *canonical == 0) |
| 14374 | || (strcmp (canonical, "000") == 0 && strcasecmp (given, "k") == 0)); |
| 14375 | } |
| 14376 | |
| 14377 | |
| 14378 | /* Return true if GIVEN matches CANONICAL, where GIVEN is a user-supplied |
| 14379 | CPU name. We've traditionally allowed a lot of variation here. |
| 14380 | |
| 14381 | Note: this function is shared between GCC and GAS. */ |
| 14382 | |
| 14383 | static bfd_boolean |
| 14384 | mips_matching_cpu_name_p (const char *canonical, const char *given) |
| 14385 | { |
| 14386 | /* First see if the name matches exactly, or with a final "000" |
| 14387 | turned into "k". */ |
| 14388 | if (mips_strict_matching_cpu_name_p (canonical, given)) |
| 14389 | return TRUE; |
| 14390 | |
| 14391 | /* If not, try comparing based on numerical designation alone. |
| 14392 | See if GIVEN is an unadorned number, or 'r' followed by a number. */ |
| 14393 | if (TOLOWER (*given) == 'r') |
| 14394 | given++; |
| 14395 | if (!ISDIGIT (*given)) |
| 14396 | return FALSE; |
| 14397 | |
| 14398 | /* Skip over some well-known prefixes in the canonical name, |
| 14399 | hoping to find a number there too. */ |
| 14400 | if (TOLOWER (canonical[0]) == 'v' && TOLOWER (canonical[1]) == 'r') |
| 14401 | canonical += 2; |
| 14402 | else if (TOLOWER (canonical[0]) == 'r' && TOLOWER (canonical[1]) == 'm') |
| 14403 | canonical += 2; |
| 14404 | else if (TOLOWER (canonical[0]) == 'r') |
| 14405 | canonical += 1; |
| 14406 | |
| 14407 | return mips_strict_matching_cpu_name_p (canonical, given); |
| 14408 | } |
| 14409 | |
| 14410 | |
| 14411 | /* Parse an option that takes the name of a processor as its argument. |
| 14412 | OPTION is the name of the option and CPU_STRING is the argument. |
| 14413 | Return the corresponding processor enumeration if the CPU_STRING is |
| 14414 | recognized, otherwise report an error and return null. |
| 14415 | |
| 14416 | A similar function exists in GCC. */ |
| 14417 | |
| 14418 | static const struct mips_cpu_info * |
| 14419 | mips_parse_cpu (const char *option, const char *cpu_string) |
| 14420 | { |
| 14421 | const struct mips_cpu_info *p; |
| 14422 | |
| 14423 | /* 'from-abi' selects the most compatible architecture for the given |
| 14424 | ABI: MIPS I for 32-bit ABIs and MIPS III for 64-bit ABIs. For the |
| 14425 | EABIs, we have to decide whether we're using the 32-bit or 64-bit |
| 14426 | version. Look first at the -mgp options, if given, otherwise base |
| 14427 | the choice on MIPS_DEFAULT_64BIT. |
| 14428 | |
| 14429 | Treat NO_ABI like the EABIs. One reason to do this is that the |
| 14430 | plain 'mips' and 'mips64' configs have 'from-abi' as their default |
| 14431 | architecture. This code picks MIPS I for 'mips' and MIPS III for |
| 14432 | 'mips64', just as we did in the days before 'from-abi'. */ |
| 14433 | if (strcasecmp (cpu_string, "from-abi") == 0) |
| 14434 | { |
| 14435 | if (ABI_NEEDS_32BIT_REGS (mips_abi)) |
| 14436 | return mips_cpu_info_from_isa (ISA_MIPS1); |
| 14437 | |
| 14438 | if (ABI_NEEDS_64BIT_REGS (mips_abi)) |
| 14439 | return mips_cpu_info_from_isa (ISA_MIPS3); |
| 14440 | |
| 14441 | if (file_mips_gp32 >= 0) |
| 14442 | return mips_cpu_info_from_isa (file_mips_gp32 ? ISA_MIPS1 : ISA_MIPS3); |
| 14443 | |
| 14444 | return mips_cpu_info_from_isa (MIPS_DEFAULT_64BIT |
| 14445 | ? ISA_MIPS3 |
| 14446 | : ISA_MIPS1); |
| 14447 | } |
| 14448 | |
| 14449 | /* 'default' has traditionally been a no-op. Probably not very useful. */ |
| 14450 | if (strcasecmp (cpu_string, "default") == 0) |
| 14451 | return 0; |
| 14452 | |
| 14453 | for (p = mips_cpu_info_table; p->name != 0; p++) |
| 14454 | if (mips_matching_cpu_name_p (p->name, cpu_string)) |
| 14455 | return p; |
| 14456 | |
| 14457 | as_bad ("Bad value (%s) for %s", cpu_string, option); |
| 14458 | return 0; |
| 14459 | } |
| 14460 | |
| 14461 | /* Return the canonical processor information for ISA (a member of the |
| 14462 | ISA_MIPS* enumeration). */ |
| 14463 | |
| 14464 | static const struct mips_cpu_info * |
| 14465 | mips_cpu_info_from_isa (int isa) |
| 14466 | { |
| 14467 | int i; |
| 14468 | |
| 14469 | for (i = 0; mips_cpu_info_table[i].name != NULL; i++) |
| 14470 | if (mips_cpu_info_table[i].is_isa |
| 14471 | && isa == mips_cpu_info_table[i].isa) |
| 14472 | return (&mips_cpu_info_table[i]); |
| 14473 | |
| 14474 | return NULL; |
| 14475 | } |
| 14476 | |
| 14477 | static const struct mips_cpu_info * |
| 14478 | mips_cpu_info_from_arch (int arch) |
| 14479 | { |
| 14480 | int i; |
| 14481 | |
| 14482 | for (i = 0; mips_cpu_info_table[i].name != NULL; i++) |
| 14483 | if (arch == mips_cpu_info_table[i].cpu) |
| 14484 | return (&mips_cpu_info_table[i]); |
| 14485 | |
| 14486 | return NULL; |
| 14487 | } |
| 14488 | \f |
| 14489 | static void |
| 14490 | show (FILE *stream, const char *string, int *col_p, int *first_p) |
| 14491 | { |
| 14492 | if (*first_p) |
| 14493 | { |
| 14494 | fprintf (stream, "%24s", ""); |
| 14495 | *col_p = 24; |
| 14496 | } |
| 14497 | else |
| 14498 | { |
| 14499 | fprintf (stream, ", "); |
| 14500 | *col_p += 2; |
| 14501 | } |
| 14502 | |
| 14503 | if (*col_p + strlen (string) > 72) |
| 14504 | { |
| 14505 | fprintf (stream, "\n%24s", ""); |
| 14506 | *col_p = 24; |
| 14507 | } |
| 14508 | |
| 14509 | fprintf (stream, "%s", string); |
| 14510 | *col_p += strlen (string); |
| 14511 | |
| 14512 | *first_p = 0; |
| 14513 | } |
| 14514 | |
| 14515 | void |
| 14516 | md_show_usage (FILE *stream) |
| 14517 | { |
| 14518 | int column, first; |
| 14519 | size_t i; |
| 14520 | |
| 14521 | fprintf (stream, _("\ |
| 14522 | MIPS options:\n\ |
| 14523 | -EB generate big endian output\n\ |
| 14524 | -EL generate little endian output\n\ |
| 14525 | -g, -g2 do not remove unneeded NOPs or swap branches\n\ |
| 14526 | -G NUM allow referencing objects up to NUM bytes\n\ |
| 14527 | implicitly with the gp register [default 8]\n")); |
| 14528 | fprintf (stream, _("\ |
| 14529 | -mips1 generate MIPS ISA I instructions\n\ |
| 14530 | -mips2 generate MIPS ISA II instructions\n\ |
| 14531 | -mips3 generate MIPS ISA III instructions\n\ |
| 14532 | -mips4 generate MIPS ISA IV instructions\n\ |
| 14533 | -mips5 generate MIPS ISA V instructions\n\ |
| 14534 | -mips32 generate MIPS32 ISA instructions\n\ |
| 14535 | -mips32r2 generate MIPS32 release 2 ISA instructions\n\ |
| 14536 | -mips64 generate MIPS64 ISA instructions\n\ |
| 14537 | -mips64r2 generate MIPS64 release 2 ISA instructions\n\ |
| 14538 | -march=CPU/-mtune=CPU generate code/schedule for CPU, where CPU is one of:\n")); |
| 14539 | |
| 14540 | first = 1; |
| 14541 | |
| 14542 | for (i = 0; mips_cpu_info_table[i].name != NULL; i++) |
| 14543 | show (stream, mips_cpu_info_table[i].name, &column, &first); |
| 14544 | show (stream, "from-abi", &column, &first); |
| 14545 | fputc ('\n', stream); |
| 14546 | |
| 14547 | fprintf (stream, _("\ |
| 14548 | -mCPU equivalent to -march=CPU -mtune=CPU. Deprecated.\n\ |
| 14549 | -no-mCPU don't generate code specific to CPU.\n\ |
| 14550 | For -mCPU and -no-mCPU, CPU must be one of:\n")); |
| 14551 | |
| 14552 | first = 1; |
| 14553 | |
| 14554 | show (stream, "3900", &column, &first); |
| 14555 | show (stream, "4010", &column, &first); |
| 14556 | show (stream, "4100", &column, &first); |
| 14557 | show (stream, "4650", &column, &first); |
| 14558 | fputc ('\n', stream); |
| 14559 | |
| 14560 | fprintf (stream, _("\ |
| 14561 | -mips16 generate mips16 instructions\n\ |
| 14562 | -no-mips16 do not generate mips16 instructions\n")); |
| 14563 | fprintf (stream, _("\ |
| 14564 | -mdsp generate DSP instructions\n\ |
| 14565 | -mno-dsp do not generate DSP instructions\n")); |
| 14566 | fprintf (stream, _("\ |
| 14567 | -mmt generate MT instructions\n\ |
| 14568 | -mno-mt do not generate MT instructions\n")); |
| 14569 | fprintf (stream, _("\ |
| 14570 | -mfix-vr4120 work around certain VR4120 errata\n\ |
| 14571 | -mfix-vr4130 work around VR4130 mflo/mfhi errata\n\ |
| 14572 | -mgp32 use 32-bit GPRs, regardless of the chosen ISA\n\ |
| 14573 | -mfp32 use 32-bit FPRs, regardless of the chosen ISA\n\ |
| 14574 | -mno-shared optimize output for executables\n\ |
| 14575 | -msym32 assume all symbols have 32-bit values\n\ |
| 14576 | -O0 remove unneeded NOPs, do not swap branches\n\ |
| 14577 | -O remove unneeded NOPs and swap branches\n\ |
| 14578 | --[no-]construct-floats [dis]allow floating point values to be constructed\n\ |
| 14579 | --trap, --no-break trap exception on div by 0 and mult overflow\n\ |
| 14580 | --break, --no-trap break exception on div by 0 and mult overflow\n")); |
| 14581 | #ifdef OBJ_ELF |
| 14582 | fprintf (stream, _("\ |
| 14583 | -KPIC, -call_shared generate SVR4 position independent code\n\ |
| 14584 | -non_shared do not generate position independent code\n\ |
| 14585 | -xgot assume a 32 bit GOT\n\ |
| 14586 | -mpdr, -mno-pdr enable/disable creation of .pdr sections\n\ |
| 14587 | -mshared, -mno-shared disable/enable .cpload optimization for\n\ |
| 14588 | non-shared code\n\ |
| 14589 | -mabi=ABI create ABI conformant object file for:\n")); |
| 14590 | |
| 14591 | first = 1; |
| 14592 | |
| 14593 | show (stream, "32", &column, &first); |
| 14594 | show (stream, "o64", &column, &first); |
| 14595 | show (stream, "n32", &column, &first); |
| 14596 | show (stream, "64", &column, &first); |
| 14597 | show (stream, "eabi", &column, &first); |
| 14598 | |
| 14599 | fputc ('\n', stream); |
| 14600 | |
| 14601 | fprintf (stream, _("\ |
| 14602 | -32 create o32 ABI object file (default)\n\ |
| 14603 | -n32 create n32 ABI object file\n\ |
| 14604 | -64 create 64 ABI object file\n")); |
| 14605 | #endif |
| 14606 | } |
| 14607 | |
| 14608 | enum dwarf2_format |
| 14609 | mips_dwarf2_format (void) |
| 14610 | { |
| 14611 | if (mips_abi == N64_ABI) |
| 14612 | { |
| 14613 | #ifdef TE_IRIX |
| 14614 | return dwarf2_format_64bit_irix; |
| 14615 | #else |
| 14616 | return dwarf2_format_64bit; |
| 14617 | #endif |
| 14618 | } |
| 14619 | else |
| 14620 | return dwarf2_format_32bit; |
| 14621 | } |
| 14622 | |
| 14623 | int |
| 14624 | mips_dwarf2_addr_size (void) |
| 14625 | { |
| 14626 | if (mips_abi == N64_ABI) |
| 14627 | return 8; |
| 14628 | else |
| 14629 | return 4; |
| 14630 | } |
| 14631 | |
| 14632 | /* Standard calling conventions leave the CFA at SP on entry. */ |
| 14633 | void |
| 14634 | mips_cfi_frame_initial_instructions (void) |
| 14635 | { |
| 14636 | cfi_add_CFA_def_cfa_register (SP); |
| 14637 | } |
| 14638 | |