| 1 | /* Table of relaxations for Xtensa assembly. |
| 2 | Copyright (C) 2003-2020 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GAS, the GNU Assembler. |
| 5 | |
| 6 | GAS is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GAS is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GAS; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, |
| 19 | MA 02110-1301, USA. */ |
| 20 | |
| 21 | /* This file contains the code for generating runtime data structures |
| 22 | for relaxation pattern matching from statically specified strings. |
| 23 | Each action contains an instruction pattern to match and |
| 24 | preconditions for the match as well as an expansion if the pattern |
| 25 | matches. The preconditions can specify that two operands are the |
| 26 | same or an operand is a specific constant or register. The expansion |
| 27 | uses the bound variables from the pattern to specify that specific |
| 28 | operands from the pattern should be used in the result. |
| 29 | |
| 30 | The code determines whether the condition applies to a constant or |
| 31 | a register depending on the type of the operand. You may get |
| 32 | unexpected results if you don't match the rule against the operand |
| 33 | type correctly. |
| 34 | |
| 35 | The patterns match a language like: |
| 36 | |
| 37 | INSN_PATTERN ::= INSN_TEMPL ( '|' PRECOND )* ( '?' OPTIONPRED )* |
| 38 | INSN_TEMPL ::= OPCODE ' ' [ OPERAND (',' OPERAND)* ] |
| 39 | OPCODE ::= id |
| 40 | OPERAND ::= CONSTANT | VARIABLE | SPECIALFN '(' VARIABLE ')' |
| 41 | SPECIALFN ::= 'HI24S' | 'F32MINUS' | 'LOW8' |
| 42 | | 'HI16' | 'LOW16' |
| 43 | VARIABLE ::= '%' id |
| 44 | PRECOND ::= OPERAND CMPOP OPERAND |
| 45 | CMPOP ::= '==' | '!=' |
| 46 | OPTIONPRED ::= OPTIONNAME ('+' OPTIONNAME) |
| 47 | OPTIONNAME ::= '"' id '"' |
| 48 | |
| 49 | The replacement language |
| 50 | INSN_REPL ::= INSN_LABEL_LIT ( ';' INSN_LABEL_LIT )* |
| 51 | INSN_LABEL_LIT ::= INSN_TEMPL |
| 52 | | 'LABEL' |
| 53 | | 'LITERAL' VARIABLE |
| 54 | |
| 55 | The operands in a PRECOND must be constants or variables bound by |
| 56 | the INSN_PATTERN. |
| 57 | |
| 58 | The configuration options define a predicate on the availability of |
| 59 | options which must be TRUE for this rule to be valid. Examples are |
| 60 | requiring "density" for replacements with density instructions, |
| 61 | requiring "const16" for replacements that require const16 |
| 62 | instructions, etc. The names are interpreted by the assembler to a |
| 63 | truth value for a particular frag. |
| 64 | |
| 65 | The operands in the INSN_REPL must be constants, variables bound in |
| 66 | the associated INSN_PATTERN, special variables that are bound in |
| 67 | the INSN_REPL by LABEL or LITERAL definitions, or special value |
| 68 | manipulation functions. |
| 69 | |
| 70 | A simple example of a replacement pattern: |
| 71 | {"movi.n %as,%imm", "movi %as,%imm"} would convert the narrow |
| 72 | movi.n instruction to the wide movi instruction. |
| 73 | |
| 74 | A more complex example of a branch around: |
| 75 | {"beqz %as,%label", "bnez %as,%LABEL;j %label;LABEL"} |
| 76 | would convert a branch to a negated branch to the following instruction |
| 77 | with a jump to the original label. |
| 78 | |
| 79 | An Xtensa-specific example that generates a literal: |
| 80 | {"movi %at,%imm", "LITERAL %imm; l32r %at,%LITERAL"} |
| 81 | will convert a movi instruction to an l32r of a literal |
| 82 | literal defined in the literal pool. |
| 83 | |
| 84 | Even more complex is a conversion of a load with immediate offset |
| 85 | to a load of a freshly generated literal, an explicit add and |
| 86 | a load with 0 offset. This transformation is only valid, though |
| 87 | when the first and second operands are not the same as specified |
| 88 | by the "| %at!=%as" precondition clause. |
| 89 | {"l32i %at,%as,%imm | %at!=%as", |
| 90 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l32i %at,%at,0"} */ |
| 91 | |
| 92 | #include "as.h" |
| 93 | #include "xtensa-isa.h" |
| 94 | #include "xtensa-relax.h" |
| 95 | #include <stddef.h> |
| 96 | #include "xtensa-config.h" |
| 97 | |
| 98 | #ifndef XCHAL_HAVE_WIDE_BRANCHES |
| 99 | #define XCHAL_HAVE_WIDE_BRANCHES 0 |
| 100 | #endif |
| 101 | |
| 102 | /* Imported from bfd. */ |
| 103 | extern xtensa_isa xtensa_default_isa; |
| 104 | |
| 105 | /* The opname_list is a small list of names that we use for opcode and |
| 106 | operand variable names to simplify ownership of these commonly used |
| 107 | strings. Strings entered in the table can be compared by pointer |
| 108 | equality. */ |
| 109 | |
| 110 | typedef struct opname_list_struct opname_list; |
| 111 | typedef opname_list opname_e; |
| 112 | |
| 113 | struct opname_list_struct |
| 114 | { |
| 115 | char *opname; |
| 116 | opname_list *next; |
| 117 | }; |
| 118 | |
| 119 | static opname_list *local_opnames = NULL; |
| 120 | |
| 121 | |
| 122 | /* The "opname_map" and its element structure "opname_map_e" are used |
| 123 | for binding an operand number to a name or a constant. */ |
| 124 | |
| 125 | typedef struct opname_map_e_struct opname_map_e; |
| 126 | typedef struct opname_map_struct opname_map; |
| 127 | |
| 128 | struct opname_map_e_struct |
| 129 | { |
| 130 | const char *operand_name; /* If null, then use constant_value. */ |
| 131 | int operand_num; |
| 132 | unsigned constant_value; |
| 133 | opname_map_e *next; |
| 134 | }; |
| 135 | |
| 136 | struct opname_map_struct |
| 137 | { |
| 138 | opname_map_e *head; |
| 139 | opname_map_e **tail; |
| 140 | }; |
| 141 | |
| 142 | /* The "precond_list" and its element structure "precond_e" represents |
| 143 | explicit preconditions comparing operand variables and constants. |
| 144 | In the "precond_e" structure, a variable is identified by the name |
| 145 | in the "opname" field. If that field is NULL, then the operand |
| 146 | is the constant in field "opval". */ |
| 147 | |
| 148 | typedef struct precond_e_struct precond_e; |
| 149 | typedef struct precond_list_struct precond_list; |
| 150 | |
| 151 | struct precond_e_struct |
| 152 | { |
| 153 | const char *opname1; |
| 154 | unsigned opval1; |
| 155 | CmpOp cmpop; |
| 156 | const char *opname2; |
| 157 | unsigned opval2; |
| 158 | precond_e *next; |
| 159 | }; |
| 160 | |
| 161 | struct precond_list_struct |
| 162 | { |
| 163 | precond_e *head; |
| 164 | precond_e **tail; |
| 165 | }; |
| 166 | |
| 167 | |
| 168 | /* The insn_templ represents the INSN_TEMPL instruction template. It |
| 169 | is an opcode name with a list of operands. These are used for |
| 170 | instruction patterns and replacement patterns. */ |
| 171 | |
| 172 | typedef struct insn_templ_struct insn_templ; |
| 173 | struct insn_templ_struct |
| 174 | { |
| 175 | const char *opcode_name; |
| 176 | opname_map operand_map; |
| 177 | }; |
| 178 | |
| 179 | |
| 180 | /* The insn_pattern represents an INSN_PATTERN instruction pattern. |
| 181 | It is an instruction template with preconditions that specify when |
| 182 | it actually matches a given instruction. */ |
| 183 | |
| 184 | typedef struct insn_pattern_struct insn_pattern; |
| 185 | struct insn_pattern_struct |
| 186 | { |
| 187 | insn_templ t; |
| 188 | precond_list preconds; |
| 189 | ReqOptionList *options; |
| 190 | }; |
| 191 | |
| 192 | |
| 193 | /* The "insn_repl" and associated element structure "insn_repl_e" |
| 194 | instruction replacement list is a list of |
| 195 | instructions/LITERALS/LABELS with constant operands or operands |
| 196 | with names bound to the operand names in the associated pattern. */ |
| 197 | |
| 198 | typedef struct insn_repl_e_struct insn_repl_e; |
| 199 | struct insn_repl_e_struct |
| 200 | { |
| 201 | insn_templ t; |
| 202 | insn_repl_e *next; |
| 203 | }; |
| 204 | |
| 205 | typedef struct insn_repl_struct insn_repl; |
| 206 | struct insn_repl_struct |
| 207 | { |
| 208 | insn_repl_e *head; |
| 209 | insn_repl_e **tail; |
| 210 | }; |
| 211 | |
| 212 | |
| 213 | /* The split_rec is a vector of allocated char * pointers. */ |
| 214 | |
| 215 | typedef struct split_rec_struct split_rec; |
| 216 | struct split_rec_struct |
| 217 | { |
| 218 | char **vec; |
| 219 | int count; |
| 220 | }; |
| 221 | |
| 222 | /* The "string_pattern_pair" is a set of pairs containing instruction |
| 223 | patterns and replacement strings. */ |
| 224 | |
| 225 | typedef struct string_pattern_pair_struct string_pattern_pair; |
| 226 | struct string_pattern_pair_struct |
| 227 | { |
| 228 | const char *pattern; |
| 229 | const char *replacement; |
| 230 | }; |
| 231 | |
| 232 | \f |
| 233 | /* The widen_spec_list is a list of valid substitutions that generate |
| 234 | wider representations. These are generally used to specify |
| 235 | replacements for instructions whose immediates do not fit their |
| 236 | encodings. A valid transition may require multiple steps of |
| 237 | one-to-one instruction replacements with a final multiple |
| 238 | instruction replacement. As an example, here are the transitions |
| 239 | required to replace an 'addi.n' with an 'addi', 'addmi'. |
| 240 | |
| 241 | addi.n a4, 0x1010 |
| 242 | => addi a4, 0x1010 |
| 243 | => addmi a4, 0x1010 |
| 244 | => addmi a4, 0x1000, addi a4, 0x10. |
| 245 | |
| 246 | See the comments in xg_assembly_relax for some important details |
| 247 | regarding how these chains must be built. */ |
| 248 | |
| 249 | static string_pattern_pair widen_spec_list[] = |
| 250 | { |
| 251 | {"add.n %ar,%as,%at ? IsaUseDensityInstruction", "add %ar,%as,%at"}, |
| 252 | {"addi.n %ar,%as,%imm ? IsaUseDensityInstruction", "addi %ar,%as,%imm"}, |
| 253 | {"beqz.n %as,%label ? IsaUseDensityInstruction", "beqz %as,%label"}, |
| 254 | {"bnez.n %as,%label ? IsaUseDensityInstruction", "bnez %as,%label"}, |
| 255 | {"l32i.n %at,%as,%imm ? IsaUseDensityInstruction", "l32i %at,%as,%imm"}, |
| 256 | {"mov.n %at,%as ? IsaUseDensityInstruction", "or %at,%as,%as"}, |
| 257 | {"movi.n %as,%imm ? IsaUseDensityInstruction", "movi %as,%imm"}, |
| 258 | {"nop.n ? IsaUseDensityInstruction ? realnop", "nop"}, |
| 259 | {"nop.n ? IsaUseDensityInstruction ? no-realnop", "or 1,1,1"}, |
| 260 | {"ret.n %as ? IsaUseDensityInstruction", "ret %as"}, |
| 261 | {"retw.n %as ? IsaUseDensityInstruction", "retw %as"}, |
| 262 | {"s32i.n %at,%as,%imm ? IsaUseDensityInstruction", "s32i %at,%as,%imm"}, |
| 263 | {"srli %at,%as,%imm", "extui %at,%as,%imm,F32MINUS(%imm)"}, |
| 264 | {"slli %ar,%as,0", "or %ar,%as,%as"}, |
| 265 | |
| 266 | /* Widening with literals or const16. */ |
| 267 | {"movi %at,%imm ? IsaUseL32R ", |
| 268 | "LITERAL %imm; l32r %at,%LITERAL"}, |
| 269 | {"movi %at,%imm ? IsaUseConst16", |
| 270 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm)"}, |
| 271 | |
| 272 | {"addi %ar,%as,%imm", "addmi %ar,%as,%imm"}, |
| 273 | /* LOW8 is the low 8 bits of the Immed |
| 274 | MID8S is the middle 8 bits of the Immed */ |
| 275 | {"addmi %ar,%as,%imm", "addmi %ar,%as,HI24S(%imm); addi %ar,%ar,LOW8(%imm)"}, |
| 276 | |
| 277 | /* In the end convert to either an l32r or const16. */ |
| 278 | {"addmi %ar,%as,%imm | %ar!=%as ? IsaUseL32R", |
| 279 | "LITERAL %imm; l32r %ar,%LITERAL; add %ar,%as,%ar"}, |
| 280 | {"addmi %ar,%as,%imm | %ar!=%as ? IsaUseConst16", |
| 281 | "const16 %ar,HI16U(%imm); const16 %ar,LOW16U(%imm); add %ar,%as,%ar"}, |
| 282 | |
| 283 | /* Widening the load instructions with too-large immediates */ |
| 284 | {"l8ui %at,%as,%imm | %at!=%as ? IsaUseL32R", |
| 285 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l8ui %at,%at,0"}, |
| 286 | {"l16si %at,%as,%imm | %at!=%as ? IsaUseL32R", |
| 287 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l16si %at,%at,0"}, |
| 288 | {"l16ui %at,%as,%imm | %at!=%as ? IsaUseL32R", |
| 289 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l16ui %at,%at,0"}, |
| 290 | {"l32i %at,%as,%imm | %at!=%as ? IsaUseL32R", |
| 291 | "LITERAL %imm; l32r %at,%LITERAL; add %at,%at,%as; l32i %at,%at,0"}, |
| 292 | |
| 293 | /* Widening load instructions with const16s. */ |
| 294 | {"l8ui %at,%as,%imm | %at!=%as ? IsaUseConst16", |
| 295 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l8ui %at,%at,0"}, |
| 296 | {"l16si %at,%as,%imm | %at!=%as ? IsaUseConst16", |
| 297 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l16si %at,%at,0"}, |
| 298 | {"l16ui %at,%as,%imm | %at!=%as ? IsaUseConst16", |
| 299 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l16ui %at,%at,0"}, |
| 300 | {"l32i %at,%as,%imm | %at!=%as ? IsaUseConst16", |
| 301 | "const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l32i %at,%at,0"}, |
| 302 | |
| 303 | /* Widening loops with literals. */ |
| 304 | {"loop %as,%label | %as!=1 ? IsaUseLoops ? IsaUseL32R", |
| 305 | "loop %as,%LABEL;" |
| 306 | "rsr.lend %as;" /* LEND */ |
| 307 | "wsr.lbeg %as;" /* LBEG */ |
| 308 | "LITERAL %label;" |
| 309 | "l32r %as, %LITERAL;" |
| 310 | "nop;" |
| 311 | "wsr.lend %as;" |
| 312 | "isync;" |
| 313 | "rsr.lcount %as;" /* LCOUNT */ |
| 314 | "addi %as, %as, 1;" |
| 315 | "LABEL"}, |
| 316 | {"loopgtz %as,%label | %as!=1 ? IsaUseLoops ? IsaUseL32R", |
| 317 | "beqz %as,%label;" |
| 318 | "bltz %as,%label;" |
| 319 | "loopgtz %as,%LABEL;" |
| 320 | "rsr.lend %as;" /* LEND */ |
| 321 | "wsr.lbeg %as;" /* LBEG */ |
| 322 | "LITERAL %label;" |
| 323 | "l32r %as, %LITERAL;" |
| 324 | "nop;" |
| 325 | "wsr.lend %as;" |
| 326 | "isync;" |
| 327 | "rsr.lcount %as;" /* LCOUNT */ |
| 328 | "addi %as, %as, 1;" |
| 329 | "LABEL"}, |
| 330 | {"loopnez %as,%label | %as!=1 ? IsaUseLoops ? IsaUseL32R", |
| 331 | "beqz %as,%label;" |
| 332 | "loopnez %as,%LABEL;" |
| 333 | "rsr.lend %as;" /* LEND */ |
| 334 | "wsr.lbeg %as;" /* LBEG */ |
| 335 | "LITERAL %label;" |
| 336 | "l32r %as, %LITERAL;" |
| 337 | "nop;" |
| 338 | "wsr.lend %as;" |
| 339 | "isync;" |
| 340 | "rsr.lcount %as;" /* LCOUNT */ |
| 341 | "addi %as, %as, 1;" |
| 342 | "LABEL"}, |
| 343 | |
| 344 | /* Widening loops with const16. */ |
| 345 | {"loop %as,%label | %as!=1 ? IsaUseLoops ? IsaUseConst16", |
| 346 | "loop %as,%LABEL;" |
| 347 | "rsr.lend %as;" /* LEND */ |
| 348 | "wsr.lbeg %as;" /* LBEG */ |
| 349 | "const16 %as,HI16U(%label);" |
| 350 | "const16 %as,LOW16U(%label);" |
| 351 | "wsr.lend %as;" |
| 352 | "isync;" |
| 353 | "rsr.lcount %as;" /* LCOUNT */ |
| 354 | "addi %as, %as, 1;" |
| 355 | "LABEL"}, |
| 356 | {"loopgtz %as,%label | %as!=1 ? IsaUseLoops ? IsaUseConst16", |
| 357 | "beqz %as,%label;" |
| 358 | "bltz %as,%label;" |
| 359 | "loopgtz %as,%LABEL;" |
| 360 | "rsr.lend %as;" /* LEND */ |
| 361 | "wsr.lbeg %as;" /* LBEG */ |
| 362 | "const16 %as,HI16U(%label);" |
| 363 | "const16 %as,LOW16U(%label);" |
| 364 | "wsr.lend %as;" |
| 365 | "isync;" |
| 366 | "rsr.lcount %as;" /* LCOUNT */ |
| 367 | "addi %as, %as, 1;" |
| 368 | "LABEL"}, |
| 369 | {"loopnez %as,%label | %as!=1 ? IsaUseLoops ? IsaUseConst16", |
| 370 | "beqz %as,%label;" |
| 371 | "loopnez %as,%LABEL;" |
| 372 | "rsr.lend %as;" /* LEND */ |
| 373 | "wsr.lbeg %as;" /* LBEG */ |
| 374 | "const16 %as,HI16U(%label);" |
| 375 | "const16 %as,LOW16U(%label);" |
| 376 | "wsr.lend %as;" |
| 377 | "isync;" |
| 378 | "rsr.lcount %as;" /* LCOUNT */ |
| 379 | "addi %as, %as, 1;" |
| 380 | "LABEL"}, |
| 381 | |
| 382 | /* Relaxing to wide branches. Order is important here. With wide |
| 383 | branches, there is more than one correct relaxation for an |
| 384 | out-of-range branch. Put the wide branch relaxations first in the |
| 385 | table since they are more efficient than the branch-around |
| 386 | relaxations. */ |
| 387 | |
| 388 | {"beqz %as,%label ? IsaUseWideBranches", "WIDE.beqz %as,%label"}, |
| 389 | {"bnez %as,%label ? IsaUseWideBranches", "WIDE.bnez %as,%label"}, |
| 390 | {"bgez %as,%label ? IsaUseWideBranches", "WIDE.bgez %as,%label"}, |
| 391 | {"bltz %as,%label ? IsaUseWideBranches", "WIDE.bltz %as,%label"}, |
| 392 | {"beqi %as,%imm,%label ? IsaUseWideBranches", "WIDE.beqi %as,%imm,%label"}, |
| 393 | {"bnei %as,%imm,%label ? IsaUseWideBranches", "WIDE.bnei %as,%imm,%label"}, |
| 394 | {"bgei %as,%imm,%label ? IsaUseWideBranches", "WIDE.bgei %as,%imm,%label"}, |
| 395 | {"blti %as,%imm,%label ? IsaUseWideBranches", "WIDE.blti %as,%imm,%label"}, |
| 396 | {"bgeui %as,%imm,%label ? IsaUseWideBranches", "WIDE.bgeui %as,%imm,%label"}, |
| 397 | {"bltui %as,%imm,%label ? IsaUseWideBranches", "WIDE.bltui %as,%imm,%label"}, |
| 398 | {"bbci %as,%imm,%label ? IsaUseWideBranches", "WIDE.bbci %as,%imm,%label"}, |
| 399 | {"bbsi %as,%imm,%label ? IsaUseWideBranches", "WIDE.bbsi %as,%imm,%label"}, |
| 400 | {"beq %as,%at,%label ? IsaUseWideBranches", "WIDE.beq %as,%at,%label"}, |
| 401 | {"bne %as,%at,%label ? IsaUseWideBranches", "WIDE.bne %as,%at,%label"}, |
| 402 | {"bge %as,%at,%label ? IsaUseWideBranches", "WIDE.bge %as,%at,%label"}, |
| 403 | {"blt %as,%at,%label ? IsaUseWideBranches", "WIDE.blt %as,%at,%label"}, |
| 404 | {"bgeu %as,%at,%label ? IsaUseWideBranches", "WIDE.bgeu %as,%at,%label"}, |
| 405 | {"bltu %as,%at,%label ? IsaUseWideBranches", "WIDE.bltu %as,%at,%label"}, |
| 406 | {"bany %as,%at,%label ? IsaUseWideBranches", "WIDE.bany %as,%at,%label"}, |
| 407 | {"bnone %as,%at,%label ? IsaUseWideBranches", "WIDE.bnone %as,%at,%label"}, |
| 408 | {"ball %as,%at,%label ? IsaUseWideBranches", "WIDE.ball %as,%at,%label"}, |
| 409 | {"bnall %as,%at,%label ? IsaUseWideBranches", "WIDE.bnall %as,%at,%label"}, |
| 410 | {"bbc %as,%at,%label ? IsaUseWideBranches", "WIDE.bbc %as,%at,%label"}, |
| 411 | {"bbs %as,%at,%label ? IsaUseWideBranches", "WIDE.bbs %as,%at,%label"}, |
| 412 | |
| 413 | /* Widening branch comparisons eq/ne to zero. Prefer relaxing to narrow |
| 414 | branches if the density option is available. */ |
| 415 | {"beqz %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%LABEL;j %label;LABEL"}, |
| 416 | {"bnez %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%LABEL;j %label;LABEL"}, |
| 417 | {"beqz %as,%label", "bnez %as,%LABEL;j %label;LABEL"}, |
| 418 | {"bnez %as,%label", "beqz %as,%LABEL;j %label;LABEL"}, |
| 419 | {"WIDE.beqz %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%LABEL;j %label;LABEL"}, |
| 420 | {"WIDE.bnez %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%LABEL;j %label;LABEL"}, |
| 421 | {"WIDE.beqz %as,%label", "bnez %as,%LABEL;j %label;LABEL"}, |
| 422 | {"WIDE.bnez %as,%label", "beqz %as,%LABEL;j %label;LABEL"}, |
| 423 | |
| 424 | /* Widening expect-taken branches. */ |
| 425 | {"beqzt %as,%label ? IsaUsePredictedBranches", "bnez %as,%LABEL;j %label;LABEL"}, |
| 426 | {"bnezt %as,%label ? IsaUsePredictedBranches", "beqz %as,%LABEL;j %label;LABEL"}, |
| 427 | {"beqt %as,%at,%label ? IsaUsePredictedBranches", "bne %as,%at,%LABEL;j %label;LABEL"}, |
| 428 | {"bnet %as,%at,%label ? IsaUsePredictedBranches", "beq %as,%at,%LABEL;j %label;LABEL"}, |
| 429 | |
| 430 | /* Widening branches from the Xtensa boolean option. */ |
| 431 | {"bt %bs,%label ? IsaUseBooleans", "bf %bs,%LABEL;j %label;LABEL"}, |
| 432 | {"bf %bs,%label ? IsaUseBooleans", "bt %bs,%LABEL;j %label;LABEL"}, |
| 433 | |
| 434 | /* Other branch-around-jump widenings. */ |
| 435 | {"bgez %as,%label", "bltz %as,%LABEL;j %label;LABEL"}, |
| 436 | {"bltz %as,%label", "bgez %as,%LABEL;j %label;LABEL"}, |
| 437 | {"beqi %as,%imm,%label", "bnei %as,%imm,%LABEL;j %label;LABEL"}, |
| 438 | {"bnei %as,%imm,%label", "beqi %as,%imm,%LABEL;j %label;LABEL"}, |
| 439 | {"bgei %as,%imm,%label", "blti %as,%imm,%LABEL;j %label;LABEL"}, |
| 440 | {"blti %as,%imm,%label", "bgei %as,%imm,%LABEL;j %label;LABEL"}, |
| 441 | {"bgeui %as,%imm,%label", "bltui %as,%imm,%LABEL;j %label;LABEL"}, |
| 442 | {"bltui %as,%imm,%label", "bgeui %as,%imm,%LABEL;j %label;LABEL"}, |
| 443 | {"bbci %as,%imm,%label", "bbsi %as,%imm,%LABEL;j %label;LABEL"}, |
| 444 | {"bbsi %as,%imm,%label", "bbci %as,%imm,%LABEL;j %label;LABEL"}, |
| 445 | {"beq %as,%at,%label", "bne %as,%at,%LABEL;j %label;LABEL"}, |
| 446 | {"bne %as,%at,%label", "beq %as,%at,%LABEL;j %label;LABEL"}, |
| 447 | {"bge %as,%at,%label", "blt %as,%at,%LABEL;j %label;LABEL"}, |
| 448 | {"blt %as,%at,%label", "bge %as,%at,%LABEL;j %label;LABEL"}, |
| 449 | {"bgeu %as,%at,%label", "bltu %as,%at,%LABEL;j %label;LABEL"}, |
| 450 | {"bltu %as,%at,%label", "bgeu %as,%at,%LABEL;j %label;LABEL"}, |
| 451 | {"bany %as,%at,%label", "bnone %as,%at,%LABEL;j %label;LABEL"}, |
| 452 | {"bnone %as,%at,%label", "bany %as,%at,%LABEL;j %label;LABEL"}, |
| 453 | {"ball %as,%at,%label", "bnall %as,%at,%LABEL;j %label;LABEL"}, |
| 454 | {"bnall %as,%at,%label", "ball %as,%at,%LABEL;j %label;LABEL"}, |
| 455 | {"bbc %as,%at,%label", "bbs %as,%at,%LABEL;j %label;LABEL"}, |
| 456 | {"bbs %as,%at,%label", "bbc %as,%at,%LABEL;j %label;LABEL"}, |
| 457 | |
| 458 | {"WIDE.bgez %as,%label", "bltz %as,%LABEL;j %label;LABEL"}, |
| 459 | {"WIDE.bltz %as,%label", "bgez %as,%LABEL;j %label;LABEL"}, |
| 460 | {"WIDE.beqi %as,%imm,%label", "bnei %as,%imm,%LABEL;j %label;LABEL"}, |
| 461 | {"WIDE.bnei %as,%imm,%label", "beqi %as,%imm,%LABEL;j %label;LABEL"}, |
| 462 | {"WIDE.bgei %as,%imm,%label", "blti %as,%imm,%LABEL;j %label;LABEL"}, |
| 463 | {"WIDE.blti %as,%imm,%label", "bgei %as,%imm,%LABEL;j %label;LABEL"}, |
| 464 | {"WIDE.bgeui %as,%imm,%label", "bltui %as,%imm,%LABEL;j %label;LABEL"}, |
| 465 | {"WIDE.bltui %as,%imm,%label", "bgeui %as,%imm,%LABEL;j %label;LABEL"}, |
| 466 | {"WIDE.bbci %as,%imm,%label", "bbsi %as,%imm,%LABEL;j %label;LABEL"}, |
| 467 | {"WIDE.bbsi %as,%imm,%label", "bbci %as,%imm,%LABEL;j %label;LABEL"}, |
| 468 | {"WIDE.beq %as,%at,%label", "bne %as,%at,%LABEL;j %label;LABEL"}, |
| 469 | {"WIDE.bne %as,%at,%label", "beq %as,%at,%LABEL;j %label;LABEL"}, |
| 470 | {"WIDE.bge %as,%at,%label", "blt %as,%at,%LABEL;j %label;LABEL"}, |
| 471 | {"WIDE.blt %as,%at,%label", "bge %as,%at,%LABEL;j %label;LABEL"}, |
| 472 | {"WIDE.bgeu %as,%at,%label", "bltu %as,%at,%LABEL;j %label;LABEL"}, |
| 473 | {"WIDE.bltu %as,%at,%label", "bgeu %as,%at,%LABEL;j %label;LABEL"}, |
| 474 | {"WIDE.bany %as,%at,%label", "bnone %as,%at,%LABEL;j %label;LABEL"}, |
| 475 | {"WIDE.bnone %as,%at,%label", "bany %as,%at,%LABEL;j %label;LABEL"}, |
| 476 | {"WIDE.ball %as,%at,%label", "bnall %as,%at,%LABEL;j %label;LABEL"}, |
| 477 | {"WIDE.bnall %as,%at,%label", "ball %as,%at,%LABEL;j %label;LABEL"}, |
| 478 | {"WIDE.bbc %as,%at,%label", "bbs %as,%at,%LABEL;j %label;LABEL"}, |
| 479 | {"WIDE.bbs %as,%at,%label", "bbc %as,%at,%LABEL;j %label;LABEL"}, |
| 480 | |
| 481 | /* Expanding calls with literals. */ |
| 482 | {"call0 %label,%ar0 ? IsaUseL32R", |
| 483 | "LITERAL %label; l32r a0,%LITERAL; callx0 a0,%ar0"}, |
| 484 | {"call4 %label,%ar4 ? IsaUseL32R", |
| 485 | "LITERAL %label; l32r a4,%LITERAL; callx4 a4,%ar4"}, |
| 486 | {"call8 %label,%ar8 ? IsaUseL32R", |
| 487 | "LITERAL %label; l32r a8,%LITERAL; callx8 a8,%ar8"}, |
| 488 | {"call12 %label,%ar12 ? IsaUseL32R", |
| 489 | "LITERAL %label; l32r a12,%LITERAL; callx12 a12,%ar12"}, |
| 490 | |
| 491 | /* Expanding calls with const16. */ |
| 492 | {"call0 %label,%ar0 ? IsaUseConst16", |
| 493 | "const16 a0,HI16U(%label); const16 a0,LOW16U(%label); callx0 a0,%ar0"}, |
| 494 | {"call4 %label,%ar4 ? IsaUseConst16", |
| 495 | "const16 a4,HI16U(%label); const16 a4,LOW16U(%label); callx4 a4,%ar4"}, |
| 496 | {"call8 %label,%ar8 ? IsaUseConst16", |
| 497 | "const16 a8,HI16U(%label); const16 a8,LOW16U(%label); callx8 a8,%ar8"}, |
| 498 | {"call12 %label,%ar12 ? IsaUseConst16", |
| 499 | "const16 a12,HI16U(%label); const16 a12,LOW16U(%label); callx12 a12,%ar12"}, |
| 500 | |
| 501 | /* Expanding j.l with literals. */ |
| 502 | {"j %label ? FREEREG ? IsaUseL32R", |
| 503 | "LITERAL %label; l32r FREEREG,%LITERAL; jx FREEREG"}, |
| 504 | /* Expanding j.l with const16. */ |
| 505 | {"j %label ? FREEREG ? IsaUseConst16", |
| 506 | "const16 FREEREG,HI16U(%label); const16 FREEREG,LOW16U(%label); jx FREEREG"}, |
| 507 | }; |
| 508 | |
| 509 | #define WIDEN_COUNT (sizeof (widen_spec_list) / sizeof (string_pattern_pair)) |
| 510 | |
| 511 | |
| 512 | /* The simplify_spec_list specifies simplifying transformations that |
| 513 | will reduce the instruction width or otherwise simplify an |
| 514 | instruction. These are usually applied before relaxation in the |
| 515 | assembler. It is always legal to simplify. Even for "addi as, 0", |
| 516 | the "addi.n as, 0" will eventually be widened back to an "addi 0" |
| 517 | after the widening table is applied. Note: The usage of this table |
| 518 | has changed somewhat so that it is entirely specific to "narrowing" |
| 519 | instructions to use the density option. This table is not used at |
| 520 | all when the density option is not available. */ |
| 521 | |
| 522 | string_pattern_pair simplify_spec_list[] = |
| 523 | { |
| 524 | {"add %ar,%as,%at ? IsaUseDensityInstruction", "add.n %ar,%as,%at"}, |
| 525 | {"addi.n %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"}, |
| 526 | {"addi %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"}, |
| 527 | {"addi %ar,%as,%imm ? IsaUseDensityInstruction", "addi.n %ar,%as,%imm"}, |
| 528 | {"addmi %ar,%as,%imm ? IsaUseDensityInstruction", "addi.n %ar,%as,%imm"}, |
| 529 | {"beqz %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%label"}, |
| 530 | {"bnez %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%label"}, |
| 531 | {"l32i %at,%as,%imm ? IsaUseDensityInstruction", "l32i.n %at,%as,%imm"}, |
| 532 | {"movi %as,%imm ? IsaUseDensityInstruction", "movi.n %as,%imm"}, |
| 533 | {"nop ? realnop ? IsaUseDensityInstruction", "nop.n"}, |
| 534 | {"or %ar,%as,%at | %ar==%as | %as==%at ? IsaUseDensityInstruction", "nop.n"}, |
| 535 | {"or %ar,%as,%at | %ar!=%as | %as==%at ? IsaUseDensityInstruction", "mov.n %ar,%as"}, |
| 536 | {"ret %as ? IsaUseDensityInstruction", "ret.n %as"}, |
| 537 | {"retw %as ? IsaUseDensityInstruction", "retw.n %as"}, |
| 538 | {"s32i %at,%as,%imm ? IsaUseDensityInstruction", "s32i.n %at,%as,%imm"}, |
| 539 | {"slli %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"} |
| 540 | }; |
| 541 | |
| 542 | #define SIMPLIFY_COUNT \ |
| 543 | (sizeof (simplify_spec_list) / sizeof (string_pattern_pair)) |
| 544 | |
| 545 | \f |
| 546 | /* Externally visible functions. */ |
| 547 | |
| 548 | extern bfd_boolean xg_has_userdef_op_fn (OpType); |
| 549 | extern long xg_apply_userdef_op_fn (OpType, long); |
| 550 | |
| 551 | |
| 552 | static void |
| 553 | append_transition (TransitionTable *tt, |
| 554 | xtensa_opcode opcode, |
| 555 | TransitionRule *t, |
| 556 | transition_cmp_fn cmp) |
| 557 | { |
| 558 | TransitionList *tl = XNEW (TransitionList); |
| 559 | TransitionList *prev; |
| 560 | TransitionList **t_p; |
| 561 | gas_assert (tt != NULL); |
| 562 | gas_assert (opcode < tt->num_opcodes); |
| 563 | |
| 564 | prev = tt->table[opcode]; |
| 565 | tl->rule = t; |
| 566 | tl->next = NULL; |
| 567 | if (prev == NULL) |
| 568 | { |
| 569 | tt->table[opcode] = tl; |
| 570 | return; |
| 571 | } |
| 572 | |
| 573 | for (t_p = &tt->table[opcode]; (*t_p) != NULL; t_p = &(*t_p)->next) |
| 574 | { |
| 575 | if (cmp && cmp (t, (*t_p)->rule) < 0) |
| 576 | { |
| 577 | /* Insert it here. */ |
| 578 | tl->next = *t_p; |
| 579 | *t_p = tl; |
| 580 | return; |
| 581 | } |
| 582 | } |
| 583 | (*t_p) = tl; |
| 584 | } |
| 585 | |
| 586 | |
| 587 | static void |
| 588 | append_condition (TransitionRule *tr, Precondition *cond) |
| 589 | { |
| 590 | PreconditionList *pl = XNEW (PreconditionList); |
| 591 | PreconditionList *prev = tr->conditions; |
| 592 | PreconditionList *nxt; |
| 593 | |
| 594 | pl->precond = cond; |
| 595 | pl->next = NULL; |
| 596 | if (prev == NULL) |
| 597 | { |
| 598 | tr->conditions = pl; |
| 599 | return; |
| 600 | } |
| 601 | nxt = prev->next; |
| 602 | while (nxt != NULL) |
| 603 | { |
| 604 | prev = nxt; |
| 605 | nxt = nxt->next; |
| 606 | } |
| 607 | prev->next = pl; |
| 608 | } |
| 609 | |
| 610 | |
| 611 | static void |
| 612 | append_value_condition (TransitionRule *tr, |
| 613 | CmpOp cmp, |
| 614 | unsigned op1, |
| 615 | unsigned op2) |
| 616 | { |
| 617 | Precondition *cond = XNEW (Precondition); |
| 618 | |
| 619 | cond->cmp = cmp; |
| 620 | cond->op_num = op1; |
| 621 | cond->typ = OP_OPERAND; |
| 622 | cond->op_data = op2; |
| 623 | append_condition (tr, cond); |
| 624 | } |
| 625 | |
| 626 | |
| 627 | static void |
| 628 | append_constant_value_condition (TransitionRule *tr, |
| 629 | CmpOp cmp, |
| 630 | unsigned op1, |
| 631 | unsigned cnst) |
| 632 | { |
| 633 | Precondition *cond = XNEW (Precondition); |
| 634 | |
| 635 | cond->cmp = cmp; |
| 636 | cond->op_num = op1; |
| 637 | cond->typ = OP_CONSTANT; |
| 638 | cond->op_data = cnst; |
| 639 | append_condition (tr, cond); |
| 640 | } |
| 641 | |
| 642 | |
| 643 | static void |
| 644 | append_build_insn (TransitionRule *tr, BuildInstr *bi) |
| 645 | { |
| 646 | BuildInstr *prev = tr->to_instr; |
| 647 | BuildInstr *nxt; |
| 648 | |
| 649 | bi->next = NULL; |
| 650 | if (prev == NULL) |
| 651 | { |
| 652 | tr->to_instr = bi; |
| 653 | return; |
| 654 | } |
| 655 | nxt = prev->next; |
| 656 | while (nxt != 0) |
| 657 | { |
| 658 | prev = nxt; |
| 659 | nxt = prev->next; |
| 660 | } |
| 661 | prev->next = bi; |
| 662 | } |
| 663 | |
| 664 | |
| 665 | static void |
| 666 | append_op (BuildInstr *bi, BuildOp *b_op) |
| 667 | { |
| 668 | BuildOp *prev = bi->ops; |
| 669 | BuildOp *nxt; |
| 670 | |
| 671 | if (prev == NULL) |
| 672 | { |
| 673 | bi->ops = b_op; |
| 674 | return; |
| 675 | } |
| 676 | nxt = prev->next; |
| 677 | while (nxt != NULL) |
| 678 | { |
| 679 | prev = nxt; |
| 680 | nxt = nxt->next; |
| 681 | } |
| 682 | prev->next = b_op; |
| 683 | } |
| 684 | |
| 685 | |
| 686 | static void |
| 687 | append_literal_op (BuildInstr *bi, unsigned op1, unsigned src_op) |
| 688 | { |
| 689 | BuildOp *b_op = XNEW (BuildOp); |
| 690 | |
| 691 | b_op->op_num = op1; |
| 692 | b_op->typ = OP_LITERAL; |
| 693 | b_op->op_data = src_op; |
| 694 | b_op->next = NULL; |
| 695 | append_op (bi, b_op); |
| 696 | } |
| 697 | |
| 698 | |
| 699 | static void |
| 700 | append_label_op (BuildInstr *bi, unsigned op1) |
| 701 | { |
| 702 | BuildOp *b_op = XNEW (BuildOp); |
| 703 | |
| 704 | b_op->op_num = op1; |
| 705 | b_op->typ = OP_LABEL; |
| 706 | b_op->op_data = 0; |
| 707 | b_op->next = NULL; |
| 708 | append_op (bi, b_op); |
| 709 | } |
| 710 | |
| 711 | |
| 712 | static void |
| 713 | append_constant_op (BuildInstr *bi, unsigned op1, unsigned cnst) |
| 714 | { |
| 715 | BuildOp *b_op = XNEW (BuildOp); |
| 716 | |
| 717 | b_op->op_num = op1; |
| 718 | b_op->typ = OP_CONSTANT; |
| 719 | b_op->op_data = cnst; |
| 720 | b_op->next = NULL; |
| 721 | append_op (bi, b_op); |
| 722 | } |
| 723 | |
| 724 | |
| 725 | static void |
| 726 | append_field_op (BuildInstr *bi, unsigned op1, unsigned src_op) |
| 727 | { |
| 728 | BuildOp *b_op = XNEW (BuildOp); |
| 729 | |
| 730 | b_op->op_num = op1; |
| 731 | b_op->typ = OP_OPERAND; |
| 732 | b_op->op_data = src_op; |
| 733 | b_op->next = NULL; |
| 734 | append_op (bi, b_op); |
| 735 | } |
| 736 | |
| 737 | |
| 738 | /* These could be generated but are not currently. */ |
| 739 | |
| 740 | static void |
| 741 | append_user_fn_field_op (BuildInstr *bi, |
| 742 | unsigned op1, |
| 743 | OpType typ, |
| 744 | unsigned src_op) |
| 745 | { |
| 746 | BuildOp *b_op = XNEW (BuildOp); |
| 747 | |
| 748 | b_op->op_num = op1; |
| 749 | b_op->typ = typ; |
| 750 | b_op->op_data = src_op; |
| 751 | b_op->next = NULL; |
| 752 | append_op (bi, b_op); |
| 753 | } |
| 754 | |
| 755 | |
| 756 | /* These operand functions are the semantics of user-defined |
| 757 | operand functions. */ |
| 758 | |
| 759 | static long |
| 760 | operand_function_HI24S (long a) |
| 761 | { |
| 762 | if (a & 0x80) |
| 763 | return (a & (~0xff)) + 0x100; |
| 764 | else |
| 765 | return (a & (~0xff)); |
| 766 | } |
| 767 | |
| 768 | |
| 769 | static long |
| 770 | operand_function_F32MINUS (long a) |
| 771 | { |
| 772 | return (32 - a); |
| 773 | } |
| 774 | |
| 775 | |
| 776 | static long |
| 777 | operand_function_LOW8 (long a) |
| 778 | { |
| 779 | if (a & 0x80) |
| 780 | return (a & 0xff) | ~0xff; |
| 781 | else |
| 782 | return (a & 0xff); |
| 783 | } |
| 784 | |
| 785 | |
| 786 | static long |
| 787 | operand_function_LOW16U (long a) |
| 788 | { |
| 789 | return (a & 0xffff); |
| 790 | } |
| 791 | |
| 792 | |
| 793 | static long |
| 794 | operand_function_HI16U (long a) |
| 795 | { |
| 796 | unsigned long b = a & 0xffff0000; |
| 797 | return (long) (b >> 16); |
| 798 | } |
| 799 | |
| 800 | |
| 801 | bfd_boolean |
| 802 | xg_has_userdef_op_fn (OpType op) |
| 803 | { |
| 804 | switch (op) |
| 805 | { |
| 806 | case OP_OPERAND_F32MINUS: |
| 807 | case OP_OPERAND_LOW8: |
| 808 | case OP_OPERAND_HI24S: |
| 809 | case OP_OPERAND_LOW16U: |
| 810 | case OP_OPERAND_HI16U: |
| 811 | return TRUE; |
| 812 | default: |
| 813 | break; |
| 814 | } |
| 815 | return FALSE; |
| 816 | } |
| 817 | |
| 818 | |
| 819 | long |
| 820 | xg_apply_userdef_op_fn (OpType op, long a) |
| 821 | { |
| 822 | switch (op) |
| 823 | { |
| 824 | case OP_OPERAND_F32MINUS: |
| 825 | return operand_function_F32MINUS (a); |
| 826 | case OP_OPERAND_LOW8: |
| 827 | return operand_function_LOW8 (a); |
| 828 | case OP_OPERAND_HI24S: |
| 829 | return operand_function_HI24S (a); |
| 830 | case OP_OPERAND_LOW16U: |
| 831 | return operand_function_LOW16U (a); |
| 832 | case OP_OPERAND_HI16U: |
| 833 | return operand_function_HI16U (a); |
| 834 | default: |
| 835 | break; |
| 836 | } |
| 837 | return FALSE; |
| 838 | } |
| 839 | |
| 840 | |
| 841 | /* Generate a transition table. */ |
| 842 | |
| 843 | static const char * |
| 844 | enter_opname_n (const char *name, int len) |
| 845 | { |
| 846 | opname_e *op; |
| 847 | |
| 848 | for (op = local_opnames; op != NULL; op = op->next) |
| 849 | { |
| 850 | if (strlen (op->opname) == (unsigned) len |
| 851 | && strncmp (op->opname, name, len) == 0) |
| 852 | return op->opname; |
| 853 | } |
| 854 | op = XNEW (opname_e); |
| 855 | op->opname = xmemdup0 (name, len); |
| 856 | return op->opname; |
| 857 | } |
| 858 | |
| 859 | |
| 860 | static const char * |
| 861 | enter_opname (const char *name) |
| 862 | { |
| 863 | opname_e *op; |
| 864 | |
| 865 | for (op = local_opnames; op != NULL; op = op->next) |
| 866 | { |
| 867 | if (strcmp (op->opname, name) == 0) |
| 868 | return op->opname; |
| 869 | } |
| 870 | op = XNEW (opname_e); |
| 871 | op->opname = xstrdup (name); |
| 872 | return op->opname; |
| 873 | } |
| 874 | |
| 875 | |
| 876 | static void |
| 877 | init_opname_map (opname_map *m) |
| 878 | { |
| 879 | m->head = NULL; |
| 880 | m->tail = &m->head; |
| 881 | } |
| 882 | |
| 883 | |
| 884 | static void |
| 885 | clear_opname_map (opname_map *m) |
| 886 | { |
| 887 | opname_map_e *e; |
| 888 | |
| 889 | while (m->head != NULL) |
| 890 | { |
| 891 | e = m->head; |
| 892 | m->head = e->next; |
| 893 | free (e); |
| 894 | } |
| 895 | m->tail = &m->head; |
| 896 | } |
| 897 | |
| 898 | |
| 899 | static bfd_boolean |
| 900 | same_operand_name (const opname_map_e *m1, const opname_map_e *m2) |
| 901 | { |
| 902 | if (m1->operand_name == NULL || m2->operand_name == NULL) |
| 903 | return FALSE; |
| 904 | return (m1->operand_name == m2->operand_name); |
| 905 | } |
| 906 | |
| 907 | |
| 908 | static opname_map_e * |
| 909 | get_opmatch (opname_map *map, const char *operand_name) |
| 910 | { |
| 911 | opname_map_e *m; |
| 912 | |
| 913 | for (m = map->head; m != NULL; m = m->next) |
| 914 | { |
| 915 | if (strcmp (m->operand_name, operand_name) == 0) |
| 916 | return m; |
| 917 | } |
| 918 | return NULL; |
| 919 | } |
| 920 | |
| 921 | |
| 922 | static bfd_boolean |
| 923 | op_is_constant (const opname_map_e *m1) |
| 924 | { |
| 925 | return (m1->operand_name == NULL); |
| 926 | } |
| 927 | |
| 928 | |
| 929 | static unsigned |
| 930 | op_get_constant (const opname_map_e *m1) |
| 931 | { |
| 932 | gas_assert (m1->operand_name == NULL); |
| 933 | return m1->constant_value; |
| 934 | } |
| 935 | |
| 936 | |
| 937 | static void |
| 938 | init_precond_list (precond_list *l) |
| 939 | { |
| 940 | l->head = NULL; |
| 941 | l->tail = &l->head; |
| 942 | } |
| 943 | |
| 944 | |
| 945 | static void |
| 946 | clear_precond_list (precond_list *l) |
| 947 | { |
| 948 | precond_e *e; |
| 949 | |
| 950 | while (l->head != NULL) |
| 951 | { |
| 952 | e = l->head; |
| 953 | l->head = e->next; |
| 954 | free (e); |
| 955 | } |
| 956 | l->tail = &l->head; |
| 957 | } |
| 958 | |
| 959 | |
| 960 | static void |
| 961 | init_insn_templ (insn_templ *t) |
| 962 | { |
| 963 | t->opcode_name = NULL; |
| 964 | init_opname_map (&t->operand_map); |
| 965 | } |
| 966 | |
| 967 | |
| 968 | static void |
| 969 | clear_insn_templ (insn_templ *t) |
| 970 | { |
| 971 | clear_opname_map (&t->operand_map); |
| 972 | } |
| 973 | |
| 974 | |
| 975 | static void |
| 976 | init_insn_pattern (insn_pattern *p) |
| 977 | { |
| 978 | init_insn_templ (&p->t); |
| 979 | init_precond_list (&p->preconds); |
| 980 | p->options = NULL; |
| 981 | } |
| 982 | |
| 983 | |
| 984 | static void |
| 985 | clear_insn_pattern (insn_pattern *p) |
| 986 | { |
| 987 | clear_insn_templ (&p->t); |
| 988 | clear_precond_list (&p->preconds); |
| 989 | } |
| 990 | |
| 991 | |
| 992 | static void |
| 993 | init_insn_repl (insn_repl *r) |
| 994 | { |
| 995 | r->head = NULL; |
| 996 | r->tail = &r->head; |
| 997 | } |
| 998 | |
| 999 | |
| 1000 | static void |
| 1001 | clear_insn_repl (insn_repl *r) |
| 1002 | { |
| 1003 | insn_repl_e *e; |
| 1004 | |
| 1005 | while (r->head != NULL) |
| 1006 | { |
| 1007 | e = r->head; |
| 1008 | r->head = e->next; |
| 1009 | clear_insn_templ (&e->t); |
| 1010 | } |
| 1011 | r->tail = &r->head; |
| 1012 | } |
| 1013 | |
| 1014 | |
| 1015 | static int |
| 1016 | insn_templ_operand_count (const insn_templ *t) |
| 1017 | { |
| 1018 | int i = 0; |
| 1019 | const opname_map_e *op; |
| 1020 | |
| 1021 | for (op = t->operand_map.head; op != NULL; op = op->next, i++) |
| 1022 | ; |
| 1023 | return i; |
| 1024 | } |
| 1025 | |
| 1026 | |
| 1027 | /* Convert a string to a number. E.G.: parse_constant("10", &num) */ |
| 1028 | |
| 1029 | static bfd_boolean |
| 1030 | parse_constant (const char *in, unsigned *val_p) |
| 1031 | { |
| 1032 | unsigned val = 0; |
| 1033 | const char *p; |
| 1034 | |
| 1035 | if (in == NULL) |
| 1036 | return FALSE; |
| 1037 | p = in; |
| 1038 | |
| 1039 | while (*p != '\0') |
| 1040 | { |
| 1041 | if (*p >= '0' && *p <= '9') |
| 1042 | val = val * 10 + (*p - '0'); |
| 1043 | else |
| 1044 | return FALSE; |
| 1045 | ++p; |
| 1046 | } |
| 1047 | *val_p = val; |
| 1048 | return TRUE; |
| 1049 | } |
| 1050 | |
| 1051 | |
| 1052 | static bfd_boolean |
| 1053 | parse_special_fn (const char *name, |
| 1054 | const char **fn_name_p, |
| 1055 | const char **arg_name_p) |
| 1056 | { |
| 1057 | const char *p_start; |
| 1058 | const char *p_end; |
| 1059 | |
| 1060 | p_start = strchr (name, '('); |
| 1061 | if (p_start == NULL) |
| 1062 | return FALSE; |
| 1063 | |
| 1064 | p_end = strchr (p_start, ')'); |
| 1065 | |
| 1066 | if (p_end == NULL) |
| 1067 | return FALSE; |
| 1068 | |
| 1069 | if (p_end[1] != '\0') |
| 1070 | return FALSE; |
| 1071 | |
| 1072 | *fn_name_p = enter_opname_n (name, p_start - name); |
| 1073 | *arg_name_p = enter_opname_n (p_start + 1, p_end - p_start - 1); |
| 1074 | return TRUE; |
| 1075 | } |
| 1076 | |
| 1077 | |
| 1078 | static const char * |
| 1079 | skip_white (const char *p) |
| 1080 | { |
| 1081 | if (p == NULL) |
| 1082 | return p; |
| 1083 | while (*p == ' ') |
| 1084 | ++p; |
| 1085 | return p; |
| 1086 | } |
| 1087 | |
| 1088 | |
| 1089 | static void |
| 1090 | trim_whitespace (char *in) |
| 1091 | { |
| 1092 | char *last_white = NULL; |
| 1093 | char *p = in; |
| 1094 | |
| 1095 | while (p && *p != '\0') |
| 1096 | { |
| 1097 | while (*p == ' ') |
| 1098 | { |
| 1099 | if (last_white == NULL) |
| 1100 | last_white = p; |
| 1101 | p++; |
| 1102 | } |
| 1103 | if (*p != '\0') |
| 1104 | { |
| 1105 | last_white = NULL; |
| 1106 | p++; |
| 1107 | } |
| 1108 | } |
| 1109 | if (last_white) |
| 1110 | *last_white = '\0'; |
| 1111 | } |
| 1112 | |
| 1113 | |
| 1114 | /* Split a string into component strings where "c" is the |
| 1115 | delimiter. Place the result in the split_rec. */ |
| 1116 | |
| 1117 | static void |
| 1118 | split_string (split_rec *rec, |
| 1119 | const char *in, |
| 1120 | char c, |
| 1121 | bfd_boolean elide_whitespace) |
| 1122 | { |
| 1123 | int cnt = 0; |
| 1124 | int i; |
| 1125 | const char *p = in; |
| 1126 | |
| 1127 | while (p != NULL && *p != '\0') |
| 1128 | { |
| 1129 | cnt++; |
| 1130 | p = strchr (p, c); |
| 1131 | if (p) |
| 1132 | p++; |
| 1133 | } |
| 1134 | rec->count = cnt; |
| 1135 | rec->vec = NULL; |
| 1136 | |
| 1137 | if (rec->count == 0) |
| 1138 | return; |
| 1139 | |
| 1140 | rec->vec = XNEWVEC (char *, cnt); |
| 1141 | for (i = 0; i < cnt; i++) |
| 1142 | rec->vec[i] = 0; |
| 1143 | |
| 1144 | p = in; |
| 1145 | for (i = 0; i < cnt; i++) |
| 1146 | { |
| 1147 | const char *q; |
| 1148 | int len; |
| 1149 | |
| 1150 | q = p; |
| 1151 | if (elide_whitespace) |
| 1152 | q = skip_white (q); |
| 1153 | |
| 1154 | p = strchr (q, c); |
| 1155 | if (p == NULL) |
| 1156 | rec->vec[i] = xstrdup (q); |
| 1157 | else |
| 1158 | { |
| 1159 | len = p - q; |
| 1160 | rec->vec[i] = xmemdup0 (q, len); |
| 1161 | p++; |
| 1162 | } |
| 1163 | |
| 1164 | if (elide_whitespace) |
| 1165 | trim_whitespace (rec->vec[i]); |
| 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | |
| 1170 | static void |
| 1171 | clear_split_rec (split_rec *rec) |
| 1172 | { |
| 1173 | int i; |
| 1174 | |
| 1175 | for (i = 0; i < rec->count; i++) |
| 1176 | free (rec->vec[i]); |
| 1177 | |
| 1178 | if (rec->count > 0) |
| 1179 | free (rec->vec); |
| 1180 | } |
| 1181 | |
| 1182 | |
| 1183 | /* Initialize a split record. The split record must be initialized |
| 1184 | before split_string is called. */ |
| 1185 | |
| 1186 | static void |
| 1187 | init_split_rec (split_rec *rec) |
| 1188 | { |
| 1189 | rec->vec = NULL; |
| 1190 | rec->count = 0; |
| 1191 | } |
| 1192 | |
| 1193 | |
| 1194 | /* Parse an instruction template like "insn op1, op2, op3". */ |
| 1195 | |
| 1196 | static bfd_boolean |
| 1197 | parse_insn_templ (const char *s, insn_templ *t) |
| 1198 | { |
| 1199 | const char *p = s; |
| 1200 | int insn_name_len; |
| 1201 | split_rec oprec; |
| 1202 | int i; |
| 1203 | |
| 1204 | /* First find the first whitespace. */ |
| 1205 | |
| 1206 | init_split_rec (&oprec); |
| 1207 | |
| 1208 | p = skip_white (p); |
| 1209 | insn_name_len = strcspn (s, " "); |
| 1210 | if (insn_name_len == 0) |
| 1211 | return FALSE; |
| 1212 | |
| 1213 | init_insn_templ (t); |
| 1214 | t->opcode_name = enter_opname_n (p, insn_name_len); |
| 1215 | |
| 1216 | p = p + insn_name_len; |
| 1217 | |
| 1218 | /* Split by ',' and skip beginning and trailing whitespace. */ |
| 1219 | split_string (&oprec, p, ',', TRUE); |
| 1220 | |
| 1221 | for (i = 0; i < oprec.count; i++) |
| 1222 | { |
| 1223 | const char *opname = oprec.vec[i]; |
| 1224 | opname_map_e *e = XNEW (opname_map_e); |
| 1225 | e->next = NULL; |
| 1226 | e->operand_name = NULL; |
| 1227 | e->constant_value = 0; |
| 1228 | e->operand_num = i; |
| 1229 | |
| 1230 | /* If it begins with a number, assume that it is a number. */ |
| 1231 | if (opname && opname[0] >= '0' && opname[0] <= '9') |
| 1232 | { |
| 1233 | unsigned val; |
| 1234 | |
| 1235 | if (parse_constant (opname, &val)) |
| 1236 | e->constant_value = val; |
| 1237 | else |
| 1238 | { |
| 1239 | free (e); |
| 1240 | clear_split_rec (&oprec); |
| 1241 | clear_insn_templ (t); |
| 1242 | return FALSE; |
| 1243 | } |
| 1244 | } |
| 1245 | else |
| 1246 | e->operand_name = enter_opname (oprec.vec[i]); |
| 1247 | |
| 1248 | *t->operand_map.tail = e; |
| 1249 | t->operand_map.tail = &e->next; |
| 1250 | } |
| 1251 | clear_split_rec (&oprec); |
| 1252 | return TRUE; |
| 1253 | } |
| 1254 | |
| 1255 | |
| 1256 | static bfd_boolean |
| 1257 | parse_precond (const char *s, precond_e *precond) |
| 1258 | { |
| 1259 | /* All preconditions are currently of the form: |
| 1260 | a == b or a != b or a == k (where k is a constant). |
| 1261 | Later we may use some special functions like DENSITY == 1 |
| 1262 | to identify when density is available. */ |
| 1263 | |
| 1264 | const char *p = s; |
| 1265 | int len; |
| 1266 | precond->opname1 = NULL; |
| 1267 | precond->opval1 = 0; |
| 1268 | precond->cmpop = OP_EQUAL; |
| 1269 | precond->opname2 = NULL; |
| 1270 | precond->opval2 = 0; |
| 1271 | precond->next = NULL; |
| 1272 | |
| 1273 | p = skip_white (p); |
| 1274 | |
| 1275 | len = strcspn (p, " !="); |
| 1276 | |
| 1277 | if (len == 0) |
| 1278 | return FALSE; |
| 1279 | |
| 1280 | precond->opname1 = enter_opname_n (p, len); |
| 1281 | p = p + len; |
| 1282 | p = skip_white (p); |
| 1283 | |
| 1284 | /* Check for "==" and "!=". */ |
| 1285 | if (strncmp (p, "==", 2) == 0) |
| 1286 | precond->cmpop = OP_EQUAL; |
| 1287 | else if (strncmp (p, "!=", 2) == 0) |
| 1288 | precond->cmpop = OP_NOTEQUAL; |
| 1289 | else |
| 1290 | return FALSE; |
| 1291 | |
| 1292 | p = p + 2; |
| 1293 | p = skip_white (p); |
| 1294 | |
| 1295 | /* No trailing whitespace from earlier parsing. */ |
| 1296 | if (p[0] >= '0' && p[0] <= '9') |
| 1297 | { |
| 1298 | unsigned val; |
| 1299 | if (parse_constant (p, &val)) |
| 1300 | precond->opval2 = val; |
| 1301 | else |
| 1302 | return FALSE; |
| 1303 | } |
| 1304 | else |
| 1305 | precond->opname2 = enter_opname (p); |
| 1306 | return TRUE; |
| 1307 | } |
| 1308 | |
| 1309 | |
| 1310 | static void |
| 1311 | clear_req_or_option_list (ReqOrOption **r_p) |
| 1312 | { |
| 1313 | if (*r_p == NULL) |
| 1314 | return; |
| 1315 | |
| 1316 | free ((*r_p)->option_name); |
| 1317 | clear_req_or_option_list (&(*r_p)->next); |
| 1318 | *r_p = NULL; |
| 1319 | } |
| 1320 | |
| 1321 | |
| 1322 | static void |
| 1323 | clear_req_option_list (ReqOption **r_p) |
| 1324 | { |
| 1325 | if (*r_p == NULL) |
| 1326 | return; |
| 1327 | |
| 1328 | clear_req_or_option_list (&(*r_p)->or_option_terms); |
| 1329 | clear_req_option_list (&(*r_p)->next); |
| 1330 | *r_p = NULL; |
| 1331 | } |
| 1332 | |
| 1333 | |
| 1334 | static ReqOrOption * |
| 1335 | clone_req_or_option_list (ReqOrOption *req_or_option) |
| 1336 | { |
| 1337 | ReqOrOption *new_req_or_option; |
| 1338 | |
| 1339 | if (req_or_option == NULL) |
| 1340 | return NULL; |
| 1341 | |
| 1342 | new_req_or_option = XNEW (ReqOrOption); |
| 1343 | new_req_or_option->option_name = xstrdup (req_or_option->option_name); |
| 1344 | new_req_or_option->is_true = req_or_option->is_true; |
| 1345 | new_req_or_option->next = NULL; |
| 1346 | new_req_or_option->next = clone_req_or_option_list (req_or_option->next); |
| 1347 | return new_req_or_option; |
| 1348 | } |
| 1349 | |
| 1350 | |
| 1351 | static ReqOption * |
| 1352 | clone_req_option_list (ReqOption *req_option) |
| 1353 | { |
| 1354 | ReqOption *new_req_option; |
| 1355 | |
| 1356 | if (req_option == NULL) |
| 1357 | return NULL; |
| 1358 | |
| 1359 | new_req_option = XNEW (ReqOption); |
| 1360 | new_req_option->or_option_terms = NULL; |
| 1361 | new_req_option->next = NULL; |
| 1362 | new_req_option->or_option_terms = |
| 1363 | clone_req_or_option_list (req_option->or_option_terms); |
| 1364 | new_req_option->next = clone_req_option_list (req_option->next); |
| 1365 | return new_req_option; |
| 1366 | } |
| 1367 | |
| 1368 | |
| 1369 | static bfd_boolean |
| 1370 | parse_option_cond (const char *s, ReqOption *option) |
| 1371 | { |
| 1372 | int i; |
| 1373 | split_rec option_term_rec; |
| 1374 | |
| 1375 | /* All option or conditions are of the form: |
| 1376 | optionA + no-optionB + ... |
| 1377 | "Ands" are divided by "?". */ |
| 1378 | |
| 1379 | init_split_rec (&option_term_rec); |
| 1380 | split_string (&option_term_rec, s, '+', TRUE); |
| 1381 | |
| 1382 | if (option_term_rec.count == 0) |
| 1383 | { |
| 1384 | clear_split_rec (&option_term_rec); |
| 1385 | return FALSE; |
| 1386 | } |
| 1387 | |
| 1388 | for (i = 0; i < option_term_rec.count; i++) |
| 1389 | { |
| 1390 | char *option_name = option_term_rec.vec[i]; |
| 1391 | bfd_boolean is_true = TRUE; |
| 1392 | ReqOrOption *req; |
| 1393 | ReqOrOption **r_p; |
| 1394 | |
| 1395 | if (strncmp (option_name, "no-", 3) == 0) |
| 1396 | { |
| 1397 | option_name = xstrdup (&option_name[3]); |
| 1398 | is_true = FALSE; |
| 1399 | } |
| 1400 | else |
| 1401 | option_name = xstrdup (option_name); |
| 1402 | |
| 1403 | req = XNEW (ReqOrOption); |
| 1404 | req->option_name = option_name; |
| 1405 | req->is_true = is_true; |
| 1406 | req->next = NULL; |
| 1407 | |
| 1408 | /* Append to list. */ |
| 1409 | for (r_p = &option->or_option_terms; (*r_p) != NULL; |
| 1410 | r_p = &(*r_p)->next) |
| 1411 | ; |
| 1412 | (*r_p) = req; |
| 1413 | } |
| 1414 | return TRUE; |
| 1415 | } |
| 1416 | |
| 1417 | |
| 1418 | /* Parse a string like: |
| 1419 | "insn op1, op2, op3, op4 | op1 != op2 | op2 == op3 | op4 == 1". |
| 1420 | I.E., instruction "insn" with 4 operands where operand 1 and 2 are not |
| 1421 | the same and operand 2 and 3 are the same and operand 4 is 1. |
| 1422 | |
| 1423 | or: |
| 1424 | |
| 1425 | "insn op1 | op1 == 1 / density + boolean / no-useroption". |
| 1426 | i.e. instruction "insn" with 1 operands where operand 1 is 1 |
| 1427 | when "density" or "boolean" options are available and |
| 1428 | "useroption" is not available. |
| 1429 | |
| 1430 | Because the current implementation of this parsing scheme uses |
| 1431 | split_string, it requires that '|' and '?' are only used as |
| 1432 | delimiters for predicates and required options. */ |
| 1433 | |
| 1434 | static bfd_boolean |
| 1435 | parse_insn_pattern (const char *in, insn_pattern *insn) |
| 1436 | { |
| 1437 | split_rec rec; |
| 1438 | split_rec optionrec; |
| 1439 | int i; |
| 1440 | |
| 1441 | init_insn_pattern (insn); |
| 1442 | |
| 1443 | init_split_rec (&optionrec); |
| 1444 | split_string (&optionrec, in, '?', TRUE); |
| 1445 | if (optionrec.count == 0) |
| 1446 | { |
| 1447 | clear_split_rec (&optionrec); |
| 1448 | return FALSE; |
| 1449 | } |
| 1450 | |
| 1451 | init_split_rec (&rec); |
| 1452 | |
| 1453 | split_string (&rec, optionrec.vec[0], '|', TRUE); |
| 1454 | |
| 1455 | if (rec.count == 0) |
| 1456 | { |
| 1457 | clear_split_rec (&rec); |
| 1458 | clear_split_rec (&optionrec); |
| 1459 | return FALSE; |
| 1460 | } |
| 1461 | |
| 1462 | if (!parse_insn_templ (rec.vec[0], &insn->t)) |
| 1463 | { |
| 1464 | clear_split_rec (&rec); |
| 1465 | clear_split_rec (&optionrec); |
| 1466 | return FALSE; |
| 1467 | } |
| 1468 | |
| 1469 | for (i = 1; i < rec.count; i++) |
| 1470 | { |
| 1471 | precond_e *cond = XNEW (precond_e); |
| 1472 | |
| 1473 | if (!parse_precond (rec.vec[i], cond)) |
| 1474 | { |
| 1475 | clear_split_rec (&rec); |
| 1476 | clear_split_rec (&optionrec); |
| 1477 | clear_insn_pattern (insn); |
| 1478 | return FALSE; |
| 1479 | } |
| 1480 | |
| 1481 | /* Append the condition. */ |
| 1482 | *insn->preconds.tail = cond; |
| 1483 | insn->preconds.tail = &cond->next; |
| 1484 | } |
| 1485 | |
| 1486 | for (i = 1; i < optionrec.count; i++) |
| 1487 | { |
| 1488 | /* Handle the option conditions. */ |
| 1489 | ReqOption **r_p; |
| 1490 | ReqOption *req_option = XNEW (ReqOption); |
| 1491 | req_option->or_option_terms = NULL; |
| 1492 | req_option->next = NULL; |
| 1493 | |
| 1494 | if (!parse_option_cond (optionrec.vec[i], req_option)) |
| 1495 | { |
| 1496 | clear_split_rec (&rec); |
| 1497 | clear_split_rec (&optionrec); |
| 1498 | clear_insn_pattern (insn); |
| 1499 | clear_req_option_list (&req_option); |
| 1500 | return FALSE; |
| 1501 | } |
| 1502 | |
| 1503 | /* Append the condition. */ |
| 1504 | for (r_p = &insn->options; (*r_p) != NULL; r_p = &(*r_p)->next) |
| 1505 | ; |
| 1506 | |
| 1507 | (*r_p) = req_option; |
| 1508 | } |
| 1509 | |
| 1510 | clear_split_rec (&rec); |
| 1511 | clear_split_rec (&optionrec); |
| 1512 | return TRUE; |
| 1513 | } |
| 1514 | |
| 1515 | |
| 1516 | static bfd_boolean |
| 1517 | parse_insn_repl (const char *in, insn_repl *r_p) |
| 1518 | { |
| 1519 | /* This is a list of instruction templates separated by ';'. */ |
| 1520 | split_rec rec; |
| 1521 | int i; |
| 1522 | |
| 1523 | split_string (&rec, in, ';', TRUE); |
| 1524 | |
| 1525 | for (i = 0; i < rec.count; i++) |
| 1526 | { |
| 1527 | insn_repl_e *e = XNEW (insn_repl_e); |
| 1528 | |
| 1529 | e->next = NULL; |
| 1530 | |
| 1531 | if (!parse_insn_templ (rec.vec[i], &e->t)) |
| 1532 | { |
| 1533 | free (e); |
| 1534 | clear_insn_repl (r_p); |
| 1535 | return FALSE; |
| 1536 | } |
| 1537 | *r_p->tail = e; |
| 1538 | r_p->tail = &e->next; |
| 1539 | } |
| 1540 | return TRUE; |
| 1541 | } |
| 1542 | |
| 1543 | |
| 1544 | static bfd_boolean |
| 1545 | transition_applies (insn_pattern *initial_insn, |
| 1546 | const char *from_string ATTRIBUTE_UNUSED, |
| 1547 | const char *to_string ATTRIBUTE_UNUSED) |
| 1548 | { |
| 1549 | ReqOption *req_option; |
| 1550 | |
| 1551 | for (req_option = initial_insn->options; |
| 1552 | req_option != NULL; |
| 1553 | req_option = req_option->next) |
| 1554 | { |
| 1555 | ReqOrOption *req_or_option = req_option->or_option_terms; |
| 1556 | |
| 1557 | if (req_or_option == NULL |
| 1558 | || req_or_option->next != NULL) |
| 1559 | continue; |
| 1560 | |
| 1561 | if (strncmp (req_or_option->option_name, "IsaUse", 6) == 0) |
| 1562 | { |
| 1563 | bfd_boolean option_available = FALSE; |
| 1564 | char *option_name = req_or_option->option_name + 6; |
| 1565 | if (!strcmp (option_name, "DensityInstruction")) |
| 1566 | option_available = (XCHAL_HAVE_DENSITY == 1); |
| 1567 | else if (!strcmp (option_name, "L32R")) |
| 1568 | option_available = (XCHAL_HAVE_L32R == 1); |
| 1569 | else if (!strcmp (option_name, "Const16")) |
| 1570 | option_available = (XCHAL_HAVE_CONST16 == 1); |
| 1571 | else if (!strcmp (option_name, "Loops")) |
| 1572 | option_available = (XCHAL_HAVE_LOOPS == 1); |
| 1573 | else if (!strcmp (option_name, "WideBranches")) |
| 1574 | option_available |
| 1575 | = (XCHAL_HAVE_WIDE_BRANCHES == 1 && produce_flix == FLIX_ALL); |
| 1576 | else if (!strcmp (option_name, "PredictedBranches")) |
| 1577 | option_available |
| 1578 | = (XCHAL_HAVE_PREDICTED_BRANCHES == 1 |
| 1579 | && produce_flix == FLIX_ALL); |
| 1580 | else if (!strcmp (option_name, "Booleans")) |
| 1581 | option_available = (XCHAL_HAVE_BOOLEANS == 1); |
| 1582 | else |
| 1583 | as_warn (_("invalid configuration option '%s' in transition rule '%s'"), |
| 1584 | req_or_option->option_name, from_string); |
| 1585 | if ((option_available ^ req_or_option->is_true) != 0) |
| 1586 | return FALSE; |
| 1587 | } |
| 1588 | else if (strcmp (req_or_option->option_name, "realnop") == 0) |
| 1589 | { |
| 1590 | bfd_boolean nop_available = |
| 1591 | (xtensa_opcode_lookup (xtensa_default_isa, "nop") |
| 1592 | != XTENSA_UNDEFINED); |
| 1593 | if ((nop_available ^ req_or_option->is_true) != 0) |
| 1594 | return FALSE; |
| 1595 | } |
| 1596 | } |
| 1597 | return TRUE; |
| 1598 | } |
| 1599 | |
| 1600 | |
| 1601 | static bfd_boolean |
| 1602 | wide_branch_opcode (const char *opcode_name, |
| 1603 | const char *suffix, |
| 1604 | xtensa_opcode *popcode) |
| 1605 | { |
| 1606 | xtensa_isa isa = xtensa_default_isa; |
| 1607 | xtensa_opcode opcode; |
| 1608 | static char wbr_name_buf[20]; |
| 1609 | |
| 1610 | if (strncmp (opcode_name, "WIDE.", 5) != 0) |
| 1611 | return FALSE; |
| 1612 | |
| 1613 | strcpy (wbr_name_buf, opcode_name + 5); |
| 1614 | strcat (wbr_name_buf, suffix); |
| 1615 | opcode = xtensa_opcode_lookup (isa, wbr_name_buf); |
| 1616 | if (opcode != XTENSA_UNDEFINED) |
| 1617 | { |
| 1618 | *popcode = opcode; |
| 1619 | return TRUE; |
| 1620 | } |
| 1621 | |
| 1622 | return FALSE; |
| 1623 | } |
| 1624 | |
| 1625 | |
| 1626 | static TransitionRule * |
| 1627 | build_transition (insn_pattern *initial_insn, |
| 1628 | insn_repl *replace_insns, |
| 1629 | const char *from_string, |
| 1630 | const char *to_string) |
| 1631 | { |
| 1632 | TransitionRule *tr = NULL; |
| 1633 | xtensa_opcode opcode; |
| 1634 | xtensa_isa isa = xtensa_default_isa; |
| 1635 | BuildInstr *literal_bi; |
| 1636 | |
| 1637 | opname_map_e *op1; |
| 1638 | opname_map_e *op2; |
| 1639 | |
| 1640 | precond_e *precond; |
| 1641 | insn_repl_e *r; |
| 1642 | |
| 1643 | if (!wide_branch_opcode (initial_insn->t.opcode_name, ".w18", &opcode) |
| 1644 | && !wide_branch_opcode (initial_insn->t.opcode_name, ".w15", &opcode)) |
| 1645 | opcode = xtensa_opcode_lookup (isa, initial_insn->t.opcode_name); |
| 1646 | |
| 1647 | if (opcode == XTENSA_UNDEFINED) |
| 1648 | { |
| 1649 | /* It is OK to not be able to translate some of these opcodes. */ |
| 1650 | return NULL; |
| 1651 | } |
| 1652 | |
| 1653 | |
| 1654 | if (xtensa_opcode_num_operands (isa, opcode) |
| 1655 | != insn_templ_operand_count (&initial_insn->t)) |
| 1656 | { |
| 1657 | /* This is also OK because there are opcodes that |
| 1658 | have different numbers of operands on different |
| 1659 | architecture variations. */ |
| 1660 | return NULL; |
| 1661 | } |
| 1662 | |
| 1663 | tr = XNEW (TransitionRule); |
| 1664 | tr->opcode = opcode; |
| 1665 | tr->conditions = NULL; |
| 1666 | tr->to_instr = NULL; |
| 1667 | |
| 1668 | /* Build the conditions. First, equivalent operand condition.... */ |
| 1669 | for (op1 = initial_insn->t.operand_map.head; op1 != NULL; op1 = op1->next) |
| 1670 | { |
| 1671 | for (op2 = op1->next; op2 != NULL; op2 = op2->next) |
| 1672 | { |
| 1673 | if (same_operand_name (op1, op2)) |
| 1674 | { |
| 1675 | append_value_condition (tr, OP_EQUAL, |
| 1676 | op1->operand_num, op2->operand_num); |
| 1677 | } |
| 1678 | } |
| 1679 | } |
| 1680 | |
| 1681 | /* Now the condition that an operand value must be a constant.... */ |
| 1682 | for (op1 = initial_insn->t.operand_map.head; op1 != NULL; op1 = op1->next) |
| 1683 | { |
| 1684 | if (op_is_constant (op1)) |
| 1685 | { |
| 1686 | append_constant_value_condition (tr, |
| 1687 | OP_EQUAL, |
| 1688 | op1->operand_num, |
| 1689 | op_get_constant (op1)); |
| 1690 | } |
| 1691 | } |
| 1692 | |
| 1693 | |
| 1694 | /* Now add the explicit preconditions listed after the "|" in the spec. |
| 1695 | These are currently very limited, so we do a special case |
| 1696 | parse for them. We expect spaces, opname != opname. */ |
| 1697 | for (precond = initial_insn->preconds.head; |
| 1698 | precond != NULL; |
| 1699 | precond = precond->next) |
| 1700 | { |
| 1701 | op1 = NULL; |
| 1702 | op2 = NULL; |
| 1703 | |
| 1704 | if (precond->opname1) |
| 1705 | { |
| 1706 | op1 = get_opmatch (&initial_insn->t.operand_map, precond->opname1); |
| 1707 | if (op1 == NULL) |
| 1708 | as_fatal (_("opcode '%s': no bound opname '%s' " |
| 1709 | "for precondition in '%s'"), |
| 1710 | xtensa_opcode_name (isa, opcode), |
| 1711 | precond->opname1, from_string); |
| 1712 | } |
| 1713 | |
| 1714 | if (precond->opname2) |
| 1715 | { |
| 1716 | op2 = get_opmatch (&initial_insn->t.operand_map, precond->opname2); |
| 1717 | if (op2 == NULL) |
| 1718 | as_fatal (_("opcode '%s': no bound opname '%s' " |
| 1719 | "for precondition in '%s'"), |
| 1720 | xtensa_opcode_name (isa, opcode), |
| 1721 | precond->opname2, from_string); |
| 1722 | } |
| 1723 | |
| 1724 | if (op1 == NULL && op2 == NULL) |
| 1725 | as_fatal (_("opcode '%s': precondition only contains " |
| 1726 | "constants in '%s'"), |
| 1727 | xtensa_opcode_name (isa, opcode), from_string); |
| 1728 | else if (op1 != NULL && op2 != NULL) |
| 1729 | append_value_condition (tr, precond->cmpop, |
| 1730 | op1->operand_num, op2->operand_num); |
| 1731 | else if (op2 == NULL) |
| 1732 | append_constant_value_condition (tr, precond->cmpop, |
| 1733 | op1->operand_num, precond->opval2); |
| 1734 | else |
| 1735 | append_constant_value_condition (tr, precond->cmpop, |
| 1736 | op2->operand_num, precond->opval1); |
| 1737 | } |
| 1738 | |
| 1739 | tr->options = clone_req_option_list (initial_insn->options); |
| 1740 | |
| 1741 | /* Generate the replacement instructions. Some of these |
| 1742 | "instructions" are actually labels and literals. There can be at |
| 1743 | most one literal and at most one label. A literal must be defined |
| 1744 | (e.g., "LITERAL %imm") before use (e.g., "%LITERAL"). The labels |
| 1745 | can be used before they are defined. Also there are a number of |
| 1746 | special operands (e.g., HI24S). */ |
| 1747 | |
| 1748 | literal_bi = NULL; |
| 1749 | for (r = replace_insns->head; r != NULL; r = r->next) |
| 1750 | { |
| 1751 | BuildInstr *bi; |
| 1752 | const char *opcode_name; |
| 1753 | int operand_count; |
| 1754 | opname_map_e *op; |
| 1755 | const char *fn_name; |
| 1756 | const char *operand_arg_name; |
| 1757 | |
| 1758 | bi = XNEW (BuildInstr); |
| 1759 | append_build_insn (tr, bi); |
| 1760 | |
| 1761 | bi->opcode = XTENSA_UNDEFINED; |
| 1762 | bi->ops = NULL; |
| 1763 | bi->next = NULL; |
| 1764 | |
| 1765 | opcode_name = r->t.opcode_name; |
| 1766 | operand_count = insn_templ_operand_count (&r->t); |
| 1767 | |
| 1768 | if (strcmp (opcode_name, "LITERAL") == 0) |
| 1769 | { |
| 1770 | bi->typ = INSTR_LITERAL_DEF; |
| 1771 | if (operand_count != 1) |
| 1772 | as_fatal (_("expected one operand for generated literal")); |
| 1773 | literal_bi = bi; |
| 1774 | } |
| 1775 | else if (strcmp (opcode_name, "LABEL") == 0) |
| 1776 | { |
| 1777 | bi->typ = INSTR_LABEL_DEF; |
| 1778 | if (operand_count != 0) |
| 1779 | as_fatal (_("expected 0 operands for generated label")); |
| 1780 | } |
| 1781 | else |
| 1782 | { |
| 1783 | bi->typ = INSTR_INSTR; |
| 1784 | if (wide_branch_opcode (opcode_name, ".w18", &bi->opcode) |
| 1785 | || wide_branch_opcode (opcode_name, ".w15", &bi->opcode)) |
| 1786 | opcode_name = xtensa_opcode_name (isa, bi->opcode); |
| 1787 | else |
| 1788 | bi->opcode = xtensa_opcode_lookup (isa, opcode_name); |
| 1789 | |
| 1790 | if (bi->opcode == XTENSA_UNDEFINED) |
| 1791 | { |
| 1792 | as_warn (_("invalid opcode '%s' in transition rule '%s'"), |
| 1793 | opcode_name, to_string); |
| 1794 | return NULL; |
| 1795 | } |
| 1796 | |
| 1797 | /* Check for the right number of ops. */ |
| 1798 | if (xtensa_opcode_num_operands (isa, bi->opcode) |
| 1799 | != (int) operand_count) |
| 1800 | as_fatal (ngettext ("opcode '%s': replacement does not have %d op", |
| 1801 | "opcode '%s': replacement does not have %d ops", |
| 1802 | xtensa_opcode_num_operands (isa, bi->opcode)), |
| 1803 | opcode_name, |
| 1804 | xtensa_opcode_num_operands (isa, bi->opcode)); |
| 1805 | } |
| 1806 | |
| 1807 | for (op = r->t.operand_map.head; op != NULL; op = op->next) |
| 1808 | { |
| 1809 | unsigned idnum; |
| 1810 | |
| 1811 | if (op_is_constant (op)) |
| 1812 | append_constant_op (bi, op->operand_num, op_get_constant (op)); |
| 1813 | else if (strcmp (op->operand_name, "%LITERAL") == 0) |
| 1814 | { |
| 1815 | if (! literal_bi || ! literal_bi->ops || literal_bi->ops->next) |
| 1816 | as_fatal (_("opcode '%s': cannot find literal definition"), |
| 1817 | opcode_name); |
| 1818 | append_literal_op (bi, op->operand_num, |
| 1819 | literal_bi->ops->op_data); |
| 1820 | } |
| 1821 | else if (strcmp (op->operand_name, "%LABEL") == 0) |
| 1822 | append_label_op (bi, op->operand_num); |
| 1823 | else if (op->operand_name[0] == 'a' |
| 1824 | && parse_constant (op->operand_name + 1, &idnum)) |
| 1825 | append_constant_op (bi, op->operand_num, idnum); |
| 1826 | else if (op->operand_name[0] == '%') |
| 1827 | { |
| 1828 | opname_map_e *orig_op; |
| 1829 | orig_op = get_opmatch (&initial_insn->t.operand_map, |
| 1830 | op->operand_name); |
| 1831 | if (orig_op == NULL) |
| 1832 | as_fatal (_("opcode '%s': unidentified operand '%s' in '%s'"), |
| 1833 | opcode_name, op->operand_name, to_string); |
| 1834 | append_field_op (bi, op->operand_num, orig_op->operand_num); |
| 1835 | } |
| 1836 | else if (strcmp (op->operand_name, "FREEREG") == 0) |
| 1837 | { |
| 1838 | append_user_fn_field_op (bi, op->operand_num, OP_FREEREG, 0); |
| 1839 | } |
| 1840 | else if (parse_special_fn (op->operand_name, |
| 1841 | &fn_name, &operand_arg_name)) |
| 1842 | { |
| 1843 | opname_map_e *orig_op; |
| 1844 | OpType typ = OP_CONSTANT; |
| 1845 | |
| 1846 | if (strcmp (fn_name, "LOW8") == 0) |
| 1847 | typ = OP_OPERAND_LOW8; |
| 1848 | else if (strcmp (fn_name, "HI24S") == 0) |
| 1849 | typ = OP_OPERAND_HI24S; |
| 1850 | else if (strcmp (fn_name, "F32MINUS") == 0) |
| 1851 | typ = OP_OPERAND_F32MINUS; |
| 1852 | else if (strcmp (fn_name, "LOW16U") == 0) |
| 1853 | typ = OP_OPERAND_LOW16U; |
| 1854 | else if (strcmp (fn_name, "HI16U") == 0) |
| 1855 | typ = OP_OPERAND_HI16U; |
| 1856 | else |
| 1857 | as_fatal (_("unknown user-defined function %s"), fn_name); |
| 1858 | |
| 1859 | orig_op = get_opmatch (&initial_insn->t.operand_map, |
| 1860 | operand_arg_name); |
| 1861 | if (orig_op == NULL) |
| 1862 | as_fatal (_("opcode '%s': unidentified operand '%s' in '%s'"), |
| 1863 | opcode_name, op->operand_name, to_string); |
| 1864 | append_user_fn_field_op (bi, op->operand_num, |
| 1865 | typ, orig_op->operand_num); |
| 1866 | } |
| 1867 | else |
| 1868 | as_fatal (_("opcode '%s': could not parse operand '%s' in '%s'"), |
| 1869 | opcode_name, op->operand_name, to_string); |
| 1870 | } |
| 1871 | } |
| 1872 | |
| 1873 | return tr; |
| 1874 | } |
| 1875 | |
| 1876 | |
| 1877 | static TransitionTable * |
| 1878 | build_transition_table (const string_pattern_pair *transitions, |
| 1879 | int transition_count, |
| 1880 | transition_cmp_fn cmp) |
| 1881 | { |
| 1882 | TransitionTable *table = NULL; |
| 1883 | int num_opcodes = xtensa_isa_num_opcodes (xtensa_default_isa); |
| 1884 | int i, tnum; |
| 1885 | |
| 1886 | if (table != NULL) |
| 1887 | return table; |
| 1888 | |
| 1889 | /* Otherwise, build it now. */ |
| 1890 | table = XNEW (TransitionTable); |
| 1891 | table->num_opcodes = num_opcodes; |
| 1892 | table->table = XNEWVEC (TransitionList *, num_opcodes); |
| 1893 | |
| 1894 | for (i = 0; i < num_opcodes; i++) |
| 1895 | table->table[i] = NULL; |
| 1896 | |
| 1897 | for (tnum = 0; tnum < transition_count; tnum++) |
| 1898 | { |
| 1899 | const char *from_string = transitions[tnum].pattern; |
| 1900 | const char *to_string = transitions[tnum].replacement; |
| 1901 | |
| 1902 | insn_pattern initial_insn; |
| 1903 | insn_repl replace_insns; |
| 1904 | TransitionRule *tr; |
| 1905 | |
| 1906 | init_insn_pattern (&initial_insn); |
| 1907 | if (!parse_insn_pattern (from_string, &initial_insn)) |
| 1908 | as_fatal (_("could not parse INSN_PATTERN '%s'"), from_string); |
| 1909 | |
| 1910 | init_insn_repl (&replace_insns); |
| 1911 | if (!parse_insn_repl (to_string, &replace_insns)) |
| 1912 | as_fatal (_("could not parse INSN_REPL '%s'"), to_string); |
| 1913 | |
| 1914 | if (transition_applies (&initial_insn, from_string, to_string)) |
| 1915 | { |
| 1916 | tr = build_transition (&initial_insn, &replace_insns, |
| 1917 | from_string, to_string); |
| 1918 | if (tr) |
| 1919 | append_transition (table, tr->opcode, tr, cmp); |
| 1920 | else |
| 1921 | { |
| 1922 | #if TENSILICA_DEBUG |
| 1923 | as_warn (_("could not build transition for %s => %s"), |
| 1924 | from_string, to_string); |
| 1925 | #endif |
| 1926 | } |
| 1927 | } |
| 1928 | |
| 1929 | clear_insn_repl (&replace_insns); |
| 1930 | clear_insn_pattern (&initial_insn); |
| 1931 | } |
| 1932 | return table; |
| 1933 | } |
| 1934 | |
| 1935 | \f |
| 1936 | extern TransitionTable * |
| 1937 | xg_build_widen_table (transition_cmp_fn cmp) |
| 1938 | { |
| 1939 | static TransitionTable *table = NULL; |
| 1940 | if (table == NULL) |
| 1941 | table = build_transition_table (widen_spec_list, WIDEN_COUNT, cmp); |
| 1942 | return table; |
| 1943 | } |
| 1944 | |
| 1945 | |
| 1946 | extern TransitionTable * |
| 1947 | xg_build_simplify_table (transition_cmp_fn cmp) |
| 1948 | { |
| 1949 | static TransitionTable *table = NULL; |
| 1950 | if (table == NULL) |
| 1951 | table = build_transition_table (simplify_spec_list, SIMPLIFY_COUNT, cmp); |
| 1952 | return table; |
| 1953 | } |