| 1 | /* Instruction printing code for the MAXQ |
| 2 | |
| 3 | Copyright 2004 Free Software Foundation, Inc. |
| 4 | |
| 5 | Written by Vineet Sharma(vineets@noida.hcltech.com) Inderpreet |
| 6 | S.(inderpreetb@noida.hcltech.com) |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify it |
| 11 | under the terms of the GNU General Public License as published by the Free |
| 12 | Software Foundation; either version 2 of the License, or (at your option) |
| 13 | any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, but |
| 16 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 17 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 18 | for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License along |
| 21 | with this program; if not, write to the Free Software Foundation, Inc., 59 |
| 22 | Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 23 | |
| 24 | #include "sysdep.h" |
| 25 | #include "dis-asm.h" |
| 26 | #include "opcode/maxq.h" |
| 27 | |
| 28 | struct _group_info |
| 29 | { |
| 30 | unsigned char group_no; |
| 31 | unsigned char sub_opcode; |
| 32 | unsigned char src; |
| 33 | unsigned char dst; |
| 34 | unsigned char fbit; |
| 35 | unsigned char bit_no; |
| 36 | unsigned char flag; |
| 37 | |
| 38 | }; |
| 39 | |
| 40 | typedef struct _group_info group_info; |
| 41 | |
| 42 | #define SRC 0x01 |
| 43 | #define DST 0x02 |
| 44 | #define FORMAT 0x04 |
| 45 | #define BIT_NO 0x08 |
| 46 | #define SUB_OP 0x10 |
| 47 | |
| 48 | #define MASK_LOW_BYTE 0x0f |
| 49 | #define MASK_HIGH_BYTE 0xf0 |
| 50 | |
| 51 | /* Flags for retrieving the bits from the op-code. */ |
| 52 | #define _DECODE_LOWNIB_LOWBYTE 0x000f |
| 53 | #define _DECODE_HIGHNIB_LOWBYTE 0x00f0 |
| 54 | #define _DECODE_LOWNIB_HIGHBYTE 0x0f00 |
| 55 | #define _DECODE_HIGHNIB_HIGHBYTE 0xf000 |
| 56 | #define _DECODE_HIGHBYTE 0xff00 |
| 57 | #define _DECODE_LOWBYTE 0x00ff |
| 58 | #define _DECODE_4TO6_HIGHBYTE 0x7000 |
| 59 | #define _DECODE_4TO6_LOWBYTE 0x0070 |
| 60 | #define _DECODE_0TO6_HIGHBYTE 0x7f00 |
| 61 | #define _DECODE_0TO2_HIGHBYTE 0x0700 |
| 62 | #define _DECODE_GET_F_HIGHBYTE 0x8000 |
| 63 | #define _DECODE_BIT7_HIGHBYTE 0x8000 |
| 64 | #define _DECODE_BIT7_LOWBYTE 0x0080 |
| 65 | #define _DECODE_GET_CARRY 0x10000 |
| 66 | #define _DECODE_BIT0_LOWBYTE 0x1 |
| 67 | #define _DECODE_BIT6AND7_HIGHBYTE 0xc000 |
| 68 | |
| 69 | /* Module and Register Indexed of System Registers. */ |
| 70 | #define _CURR_ACC_MODINDEX 0xa |
| 71 | #define _CURR_ACC_REGINDEX 0x0 |
| 72 | #define _PSF_REG_MODINDEX 0x8 |
| 73 | #define _PSF_REG_REGINDEX 0x4 |
| 74 | #define _PFX_REG_MODINDEX 0xb |
| 75 | #define _PFX0_REG_REGINDEX 0x0 |
| 76 | #define _PFX2_REG_REGINDEX 0x2 |
| 77 | #define _DP_REG_MODINDEX 0xf |
| 78 | #define _DP0_REG_REGINDEX 0x3 |
| 79 | #define _DP1_REG_REGINDEX 0x7 |
| 80 | #define _IP_REG_MODINDEX 0xc |
| 81 | #define _IP_REG_REGINDEX 0x0 |
| 82 | #define _IIR_REG_MODINDEX 0x8 |
| 83 | #define _IIR_REG_REGINDEX 0xb |
| 84 | #define _SP_REG_MODINDEX 0xd |
| 85 | #define _SP_REG_REGINDEX 0x1 |
| 86 | #define _IC_REG_MODINDEX 0x8 |
| 87 | #define _IC_REG_REGINDEX 0x5 |
| 88 | #define _LC_REG_MODINDEX 0xe |
| 89 | #define _LC0_REG_REGINDEX 0x0 |
| 90 | #define _LC1_REG_REGINDEX 0x1 |
| 91 | #define _LC2_REG_REGINDEX 0x2 |
| 92 | #define _LC3_REG_REGINDEX 0x3 |
| 93 | |
| 94 | /* Flags for finding the bits in PSF Register. */ |
| 95 | #define SIM_ALU_DECODE_CARRY_BIT_POS 0x2 |
| 96 | #define SIM_ALU_DECODE_SIGN_BIT_POS 0x40 |
| 97 | #define SIM_ALU_DECODE_ZERO_BIT_POS 0x80 |
| 98 | #define SIM_ALU_DECODE_EQUAL_BIT_POS 0x1 |
| 99 | #define SIM_ALU_DECODE_IGE_BIT_POS 0x1 |
| 100 | |
| 101 | /* Number Of Op-code Groups. */ |
| 102 | unsigned char const SIM_ALU_DECODE_OPCODE_GROUPS = 11; |
| 103 | |
| 104 | /* Op-code Groups. */ |
| 105 | unsigned char const SIM_ALU_DECODE_LOGICAL_XCHG_OP_GROUP = 1; |
| 106 | |
| 107 | /* Group1: AND/OR/XOR/ADD/SUB Operations: fxxx 1010 ssss ssss. */ |
| 108 | unsigned char const SIM_ALU_DECODE_AND_OR_ADD_SUB_OP_GROUP = 2; |
| 109 | |
| 110 | /* Group2: Logical Operations: 1000 1010 xxxx 1010. */ |
| 111 | unsigned char const SIM_ALU_DECODE_BIT_OP_GROUP = 3; |
| 112 | |
| 113 | /* XCHG/Bit Operations: 1xxx 1010 xxxx 1010. */ |
| 114 | unsigned char const SIM_ALU_DECODE_SET_DEST_BIT_GROUP = 4; |
| 115 | |
| 116 | /* Move value in bit of destination register: 1ddd dddd xbbb 0111. */ |
| 117 | unsigned char const SIM_ALU_DECODE_JUMP_OP_GROUP = 5; |
| 118 | |
| 119 | #define JUMP_CHECK(insn) \ |
| 120 | ( ((insn & _DECODE_4TO6_HIGHBYTE) == 0x0000) \ |
| 121 | || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x2000) \ |
| 122 | || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x6000) \ |
| 123 | || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x1000) \ |
| 124 | || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x5000) \ |
| 125 | || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x3000) \ |
| 126 | || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x7000) \ |
| 127 | || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x4000) ) |
| 128 | |
| 129 | /* JUMP operations: fxxx 1100 ssss ssss */ |
| 130 | unsigned char const SIM_ALU_DECODE_RET_OP_GROUP = 6; |
| 131 | |
| 132 | /* RET Operations: 1xxx 1100 0000 1101 */ |
| 133 | unsigned char const SIM_ALU_DECODE_MOVE_SRC_DST_GROUP = 7; |
| 134 | |
| 135 | /* Move src into dest register: fddd dddd ssss ssss */ |
| 136 | unsigned char const SIM_ALU_DECODE_SET_SRC_BIT_GROUP = 8; |
| 137 | |
| 138 | /* Move value in bit of source register: fbbb 0111 ssss ssss */ |
| 139 | unsigned char const SIM_ALU_DECODE_DJNZ_CALL_PUSH_OP_GROUP = 9; |
| 140 | |
| 141 | /* PUSH, DJNZ and CALL operations: fxxx 1101 ssss ssss */ |
| 142 | unsigned char const SIM_ALU_DECODE_POP_OP_GROUP = 10; |
| 143 | |
| 144 | /* POP operation: 1ddd dddd 0000 1101 */ |
| 145 | unsigned char const SIM_ALU_DECODE_CMP_SRC_OP_GROUP = 11; |
| 146 | |
| 147 | /* GLOBAL */ |
| 148 | unsigned char unres_reg_name[20]; |
| 149 | |
| 150 | static unsigned char * |
| 151 | get_reg_name (unsigned char reg_code, type1 arg_pos) |
| 152 | { |
| 153 | unsigned char module; |
| 154 | unsigned char index; |
| 155 | int ix = 0; |
| 156 | reg_entry const *reg_x; |
| 157 | mem_access_syntax const *syntax; |
| 158 | mem_access *mem_acc; |
| 159 | |
| 160 | module = 0; |
| 161 | index = 0; |
| 162 | module = (reg_code & MASK_LOW_BYTE); |
| 163 | index = (reg_code & MASK_HIGH_BYTE); |
| 164 | index = index >> 4; |
| 165 | |
| 166 | /* Search the system register table. */ |
| 167 | for (reg_x = &system_reg_table[0]; reg_x->reg_name != NULL; ++reg_x) |
| 168 | if ((reg_x->Mod_name == module) && (reg_x->Mod_index == index)) |
| 169 | return reg_x->reg_name; |
| 170 | |
| 171 | /* Serch pheripheral table. */ |
| 172 | for (ix = 0; ix < num_of_reg; ix++) |
| 173 | { |
| 174 | reg_x = &new_reg_table[ix]; |
| 175 | |
| 176 | if ((reg_x->Mod_name == module) && (reg_x->Mod_index == index)) |
| 177 | return reg_x->reg_name; |
| 178 | } |
| 179 | |
| 180 | for (mem_acc = &mem_table[0]; mem_acc->name != NULL || !mem_acc; ++mem_acc) |
| 181 | { |
| 182 | if (reg_code == mem_acc->opcode) |
| 183 | { |
| 184 | for (syntax = mem_access_syntax_table; |
| 185 | mem_access_syntax_table != NULL || mem_access_syntax_table->name; |
| 186 | ++syntax) |
| 187 | if (!strcmp (mem_acc->name, syntax->name)) |
| 188 | { |
| 189 | if ((arg_pos == syntax->type) || (syntax->type == BOTH)) |
| 190 | return mem_acc->name; |
| 191 | |
| 192 | break; |
| 193 | } |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | memset (unres_reg_name, 0, 20); |
| 198 | sprintf (unres_reg_name, "%01x%01xh", index, module); |
| 199 | |
| 200 | return unres_reg_name; |
| 201 | } |
| 202 | |
| 203 | static bfd_boolean |
| 204 | check_move (unsigned char insn0, unsigned char insn8) |
| 205 | { |
| 206 | bfd_boolean first = FALSE; |
| 207 | bfd_boolean second = FALSE; |
| 208 | char *first_reg; |
| 209 | char *second_reg; |
| 210 | reg_entry const *reg_x; |
| 211 | const unsigned char module1 = insn0 & MASK_LOW_BYTE; |
| 212 | const unsigned char index1 = ((insn0 & 0x70) >> 4); |
| 213 | const unsigned char module2 = insn8 & MASK_LOW_BYTE; |
| 214 | const unsigned char index2 = ((insn8 & MASK_HIGH_BYTE) >> 4); |
| 215 | |
| 216 | /* DST */ |
| 217 | if (((insn0 & MASK_LOW_BYTE) == MASK_LOW_BYTE) |
| 218 | && ((index1 == 0) || (index1 == 1) || (index1 == 2) || (index1 == 5) |
| 219 | || (index1 == 4) || (index1 == 6))) |
| 220 | first = TRUE; |
| 221 | |
| 222 | else if (((insn0 & MASK_LOW_BYTE) == 0x0D) && (index1 == 0)) |
| 223 | first = TRUE; |
| 224 | |
| 225 | else if ((module1 == 0x0E) |
| 226 | && ((index1 == 0) || (index1 == 1) || (index1 == 2))) |
| 227 | first = TRUE; |
| 228 | |
| 229 | else |
| 230 | { |
| 231 | for (reg_x = &system_reg_table[0]; reg_x->reg_name != NULL && reg_x; |
| 232 | ++reg_x) |
| 233 | { |
| 234 | if ((reg_x->Mod_name == module1) && (reg_x->Mod_index == index1) |
| 235 | && ((reg_x->rtype == Reg_16W) || (reg_x->rtype == Reg_8W))) |
| 236 | { |
| 237 | /* IP not allowed. */ |
| 238 | if ((reg_x->Mod_name == 0x0C) && (reg_x->Mod_index == 0x00)) |
| 239 | continue; |
| 240 | |
| 241 | /* A[AP] not allowed. */ |
| 242 | if ((reg_x->Mod_name == 0x0A) && (reg_x->Mod_index == 0x01)) |
| 243 | continue; |
| 244 | first_reg = reg_x->reg_name; |
| 245 | first = TRUE; |
| 246 | break; |
| 247 | } |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | if (!first) |
| 252 | /* No need to check further. */ |
| 253 | return FALSE; |
| 254 | |
| 255 | if (insn0 & 0x80) |
| 256 | { |
| 257 | /* SRC */ |
| 258 | if (((insn8 & MASK_LOW_BYTE) == MASK_LOW_BYTE) |
| 259 | && ((index2 == 0) || (index2 == 1) || (index2 == 2) || (index2 == 4) |
| 260 | || (index2 == 5) || (index2 == 6))) |
| 261 | second = TRUE; |
| 262 | |
| 263 | else if (((insn8 & MASK_LOW_BYTE) == 0x0D) && (index2 == 0)) |
| 264 | second = TRUE; |
| 265 | |
| 266 | else if ((module2 == 0x0E) |
| 267 | && ((index2 == 0) || (index2 == 1) || (index2 == 2))) |
| 268 | second = TRUE; |
| 269 | |
| 270 | else |
| 271 | { |
| 272 | for (reg_x = &system_reg_table[0]; |
| 273 | reg_x->reg_name != NULL && reg_x; |
| 274 | ++reg_x) |
| 275 | { |
| 276 | if ((reg_x->Mod_name == (insn8 & MASK_LOW_BYTE)) |
| 277 | && (reg_x->Mod_index == (((insn8 & 0xf0) >> 4)))) |
| 278 | { |
| 279 | second = TRUE; |
| 280 | second_reg = reg_x->reg_name; |
| 281 | break; |
| 282 | } |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | if (second) |
| 287 | { |
| 288 | if ((module1 == 0x0A && index1 == 0x0) |
| 289 | && (module2 == 0x0A && index2 == 0x01)) |
| 290 | return FALSE; |
| 291 | |
| 292 | return TRUE; |
| 293 | } |
| 294 | |
| 295 | return FALSE; |
| 296 | } |
| 297 | |
| 298 | return first; |
| 299 | } |
| 300 | |
| 301 | static void |
| 302 | maxq_print_arg (MAX_ARG_TYPE arg, |
| 303 | struct disassemble_info * info, |
| 304 | group_info grp) |
| 305 | { |
| 306 | switch (arg) |
| 307 | { |
| 308 | case FLAG_C: |
| 309 | info->fprintf_func (info->stream, "C"); |
| 310 | break; |
| 311 | case FLAG_NC: |
| 312 | info->fprintf_func (info->stream, "NC"); |
| 313 | break; |
| 314 | |
| 315 | case FLAG_Z: |
| 316 | info->fprintf_func (info->stream, "Z"); |
| 317 | break; |
| 318 | |
| 319 | case FLAG_NZ: |
| 320 | info->fprintf_func (info->stream, "NZ"); |
| 321 | break; |
| 322 | |
| 323 | case FLAG_S: |
| 324 | info->fprintf_func (info->stream, "S"); |
| 325 | break; |
| 326 | |
| 327 | case FLAG_E: |
| 328 | info->fprintf_func (info->stream, "E"); |
| 329 | break; |
| 330 | |
| 331 | case FLAG_NE: |
| 332 | info->fprintf_func (info->stream, "NE"); |
| 333 | break; |
| 334 | |
| 335 | case ACC_BIT: |
| 336 | info->fprintf_func (info->stream, "Acc"); |
| 337 | if ((grp.flag & BIT_NO) == BIT_NO) |
| 338 | info->fprintf_func (info->stream, ".%d", grp.bit_no); |
| 339 | break; |
| 340 | |
| 341 | case A_BIT_0: |
| 342 | info->fprintf_func (info->stream, "#0"); |
| 343 | break; |
| 344 | case A_BIT_1: |
| 345 | info->fprintf_func (info->stream, "#1"); |
| 346 | break; |
| 347 | |
| 348 | default: |
| 349 | break; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | static unsigned char |
| 354 | get_group (const unsigned int insn) |
| 355 | { |
| 356 | if (check_move ((insn >> 8), (insn & _DECODE_LOWBYTE))) |
| 357 | return 8; |
| 358 | |
| 359 | if ((insn & _DECODE_LOWNIB_HIGHBYTE) == 0x0A00) |
| 360 | { |
| 361 | /* && condition with sec part added on 26 May for resoveing 2 & 3 grp |
| 362 | conflict. */ |
| 363 | if (((insn & _DECODE_LOWNIB_LOWBYTE) == 0x000A) |
| 364 | && ((insn & _DECODE_GET_F_HIGHBYTE) == 0x8000)) |
| 365 | { |
| 366 | if ((insn & _DECODE_HIGHNIB_HIGHBYTE) == 0x8000) |
| 367 | return 2; |
| 368 | else |
| 369 | return 3; |
| 370 | } |
| 371 | |
| 372 | return 1; |
| 373 | } |
| 374 | else if ((insn & _DECODE_LOWNIB_HIGHBYTE) == 0x0C00) |
| 375 | { |
| 376 | if (((insn & _DECODE_LOWBYTE) == 0x000D) && JUMP_CHECK (insn) |
| 377 | && ((insn & _DECODE_GET_F_HIGHBYTE) == 0x8000)) |
| 378 | return 6; |
| 379 | else if ((insn & _DECODE_LOWBYTE) == 0x008D) |
| 380 | return 7; |
| 381 | |
| 382 | return 5; |
| 383 | } |
| 384 | else if (((insn & _DECODE_LOWNIB_HIGHBYTE) == 0x0D00) |
| 385 | && (((insn & _DECODE_4TO6_HIGHBYTE) == 0x3000) |
| 386 | || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x4000) |
| 387 | || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x5000) |
| 388 | || ((insn & _DECODE_4TO6_HIGHBYTE) == 0x0000))) |
| 389 | return 10; |
| 390 | |
| 391 | else if ((insn & _DECODE_LOWBYTE) == 0x000D) |
| 392 | return 11; |
| 393 | |
| 394 | else if ((insn & _DECODE_LOWBYTE) == 0x008D) |
| 395 | return 12; |
| 396 | |
| 397 | else if ((insn & _DECODE_0TO6_HIGHBYTE) == 0x7800) |
| 398 | return 13; |
| 399 | |
| 400 | else if ((insn & _DECODE_LOWNIB_HIGHBYTE) == 0x0700) |
| 401 | return 9; |
| 402 | |
| 403 | else if (((insn & _DECODE_LOWNIB_LOWBYTE) == 0x0007) |
| 404 | && ((insn & _DECODE_GET_F_HIGHBYTE) == 0x8000)) |
| 405 | return 4; |
| 406 | |
| 407 | return 8; |
| 408 | } |
| 409 | |
| 410 | static void |
| 411 | get_insn_opcode (const unsigned int insn, group_info *i) |
| 412 | { |
| 413 | static unsigned char pfx_flag = 0; |
| 414 | static unsigned char count_for_pfx = 0; |
| 415 | |
| 416 | i->flag ^= i->flag; |
| 417 | i->bit_no ^= i->bit_no; |
| 418 | i->dst ^= i->dst; |
| 419 | i->fbit ^= i->fbit; |
| 420 | i->group_no ^= i->group_no; |
| 421 | i->src ^= i->src; |
| 422 | i->sub_opcode ^= i->sub_opcode; |
| 423 | |
| 424 | if (count_for_pfx > 0) |
| 425 | count_for_pfx++; |
| 426 | |
| 427 | if (((insn >> 8) == 0x0b) || ((insn >> 8) == 0x2b)) |
| 428 | { |
| 429 | pfx_flag = 1; |
| 430 | count_for_pfx = 1; |
| 431 | } |
| 432 | |
| 433 | i->group_no = get_group (insn); |
| 434 | |
| 435 | if (pfx_flag && (i->group_no == 0x0D) && (count_for_pfx == 2) |
| 436 | && ((insn & _DECODE_0TO6_HIGHBYTE) == 0x7800)) |
| 437 | { |
| 438 | i->group_no = 0x08; |
| 439 | count_for_pfx = 0; |
| 440 | pfx_flag ^= pfx_flag; |
| 441 | } |
| 442 | |
| 443 | switch (i->group_no) |
| 444 | { |
| 445 | case 1: |
| 446 | i->sub_opcode = ((insn & _DECODE_4TO6_HIGHBYTE) >> 12); |
| 447 | i->flag |= SUB_OP; |
| 448 | i->src = ((insn & _DECODE_LOWBYTE)); |
| 449 | i->flag |= SRC; |
| 450 | i->fbit = ((insn & _DECODE_GET_F_HIGHBYTE) >> 15); |
| 451 | i->flag |= FORMAT; |
| 452 | break; |
| 453 | |
| 454 | case 2: |
| 455 | i->sub_opcode = ((insn & _DECODE_HIGHNIB_LOWBYTE) >> 4); |
| 456 | i->flag |= SUB_OP; |
| 457 | break; |
| 458 | |
| 459 | case 3: |
| 460 | i->sub_opcode = ((insn & _DECODE_HIGHNIB_HIGHBYTE) >> 12); |
| 461 | i->flag |= SUB_OP; |
| 462 | i->bit_no = ((insn & _DECODE_HIGHNIB_LOWBYTE) >> 4); |
| 463 | i->flag |= BIT_NO; |
| 464 | break; |
| 465 | |
| 466 | case 4: |
| 467 | i->sub_opcode = ((insn & _DECODE_BIT7_LOWBYTE) >> 7); |
| 468 | i->flag |= SUB_OP; |
| 469 | i->dst = ((insn & _DECODE_0TO6_HIGHBYTE) >> 8); |
| 470 | i->flag |= DST; |
| 471 | i->bit_no = ((insn & _DECODE_4TO6_LOWBYTE) >> 4); |
| 472 | i->flag |= BIT_NO; |
| 473 | break; |
| 474 | |
| 475 | case 5: |
| 476 | i->sub_opcode = ((insn & _DECODE_4TO6_HIGHBYTE) >> 12); |
| 477 | i->flag |= SUB_OP; |
| 478 | i->src = ((insn & _DECODE_LOWBYTE)); |
| 479 | i->flag |= SRC; |
| 480 | i->fbit = ((insn & _DECODE_GET_F_HIGHBYTE) >> 15); |
| 481 | i->flag |= FORMAT; |
| 482 | break; |
| 483 | |
| 484 | case 6: |
| 485 | i->sub_opcode = ((insn & _DECODE_HIGHNIB_HIGHBYTE) >> 12); |
| 486 | i->flag |= SUB_OP; |
| 487 | break; |
| 488 | |
| 489 | case 7: |
| 490 | i->sub_opcode = ((insn & _DECODE_HIGHNIB_HIGHBYTE) >> 12); |
| 491 | i->flag |= SUB_OP; |
| 492 | break; |
| 493 | |
| 494 | case 8: |
| 495 | i->dst = ((insn & _DECODE_0TO6_HIGHBYTE) >> 8); |
| 496 | i->flag |= DST; |
| 497 | i->src = ((insn & _DECODE_LOWBYTE)); |
| 498 | i->flag |= SRC; |
| 499 | i->fbit = ((insn & _DECODE_GET_F_HIGHBYTE) >> 15); |
| 500 | i->flag |= FORMAT; |
| 501 | break; |
| 502 | |
| 503 | case 9: |
| 504 | i->sub_opcode = ((insn & _DECODE_0TO2_HIGHBYTE) >> 8); |
| 505 | i->flag |= SUB_OP; |
| 506 | i->bit_no = ((insn & _DECODE_4TO6_HIGHBYTE) >> 12); |
| 507 | i->flag |= BIT_NO; |
| 508 | i->fbit = ((insn & _DECODE_GET_F_HIGHBYTE) >> 15); |
| 509 | i->flag |= FORMAT; |
| 510 | i->src = ((insn & _DECODE_LOWBYTE)); |
| 511 | i->flag |= SRC; |
| 512 | break; |
| 513 | |
| 514 | case 10: |
| 515 | i->sub_opcode = ((insn & _DECODE_4TO6_HIGHBYTE) >> 12); |
| 516 | i->flag |= SUB_OP; |
| 517 | i->src = ((insn & _DECODE_LOWBYTE)); |
| 518 | i->flag |= SRC; |
| 519 | i->fbit = ((insn & _DECODE_GET_F_HIGHBYTE) >> 15); |
| 520 | i->flag |= FORMAT; |
| 521 | break; |
| 522 | |
| 523 | case 11: |
| 524 | i->dst = ((insn & _DECODE_0TO6_HIGHBYTE) >> 8); |
| 525 | i->flag |= DST; |
| 526 | break; |
| 527 | |
| 528 | case 12: |
| 529 | i->dst = ((insn & _DECODE_0TO6_HIGHBYTE) >> 8); |
| 530 | i->flag |= DST; |
| 531 | break; |
| 532 | |
| 533 | case 13: |
| 534 | i->sub_opcode = ((insn & _DECODE_4TO6_HIGHBYTE) >> 12); |
| 535 | i->flag |= SUB_OP; |
| 536 | i->src = ((insn & _DECODE_LOWBYTE)); |
| 537 | i->flag |= SRC; |
| 538 | i->fbit = ((insn & _DECODE_GET_F_HIGHBYTE) >> 15); |
| 539 | i->flag |= FORMAT; |
| 540 | break; |
| 541 | |
| 542 | } |
| 543 | return; |
| 544 | } |
| 545 | |
| 546 | |
| 547 | /* Print one instruction from MEMADDR on INFO->STREAM. Return the size of the |
| 548 | instruction (always 2 on MAXQ20). */ |
| 549 | |
| 550 | static int |
| 551 | print_insn (bfd_vma memaddr, struct disassemble_info *info, |
| 552 | enum bfd_endian endianess) |
| 553 | { |
| 554 | /* The raw instruction. */ |
| 555 | unsigned char insn[2], insn0, insn8, derived_code; |
| 556 | unsigned int format; |
| 557 | unsigned int actual_operands; |
| 558 | unsigned int i; |
| 559 | /* The group_info collected/decoded. */ |
| 560 | group_info grp; |
| 561 | MAXQ20_OPCODE_INFO const *opcode; |
| 562 | int status; |
| 563 | |
| 564 | format = 0; |
| 565 | |
| 566 | status = info->read_memory_func (memaddr, (bfd_byte *) & insn[0], 2, info); |
| 567 | |
| 568 | if (status != 0) |
| 569 | { |
| 570 | info->memory_error_func (status, memaddr, info); |
| 571 | return -1; |
| 572 | } |
| 573 | |
| 574 | insn8 = insn[1]; |
| 575 | insn0 = insn[0]; |
| 576 | |
| 577 | /* FIXME: Endianness always little. */ |
| 578 | if (endianess == BFD_ENDIAN_BIG) |
| 579 | get_insn_opcode (((insn[0] << 8) | (insn[1])), &grp); |
| 580 | else |
| 581 | get_insn_opcode (((insn[1] << 8) | (insn[0])), &grp); |
| 582 | |
| 583 | derived_code = ((grp.group_no << 4) | grp.sub_opcode); |
| 584 | |
| 585 | if (insn[0] == 0 && insn[1] == 0) |
| 586 | { |
| 587 | info->fprintf_func (info->stream, "00 00"); |
| 588 | return 2; |
| 589 | } |
| 590 | |
| 591 | /* The opcode is always in insn0. */ |
| 592 | for (opcode = &op_table[0]; opcode->name != NULL; ++opcode) |
| 593 | { |
| 594 | if (opcode->instr_id == derived_code) |
| 595 | { |
| 596 | if (opcode->instr_id == 0x3D) |
| 597 | { |
| 598 | if ((grp.bit_no == 0) && (opcode->arg[1] != A_BIT_0)) |
| 599 | continue; |
| 600 | if ((grp.bit_no == 1) && (opcode->arg[1] != A_BIT_1)) |
| 601 | continue; |
| 602 | if ((grp.bit_no == 3) && (opcode->arg[0] != 0)) |
| 603 | continue; |
| 604 | } |
| 605 | |
| 606 | info->fprintf_func (info->stream, "%s ", opcode->name); |
| 607 | |
| 608 | actual_operands = 0; |
| 609 | |
| 610 | if ((grp.flag & SRC) == SRC) |
| 611 | actual_operands++; |
| 612 | |
| 613 | if ((grp.flag & DST) == DST) |
| 614 | actual_operands++; |
| 615 | |
| 616 | /* If Implict FLAG in the Instruction. */ |
| 617 | if ((opcode->op_number > actual_operands) |
| 618 | && !((grp.flag & SRC) == SRC) && !((grp.flag & DST) == DST)) |
| 619 | { |
| 620 | for (i = 0; i < opcode->op_number; i++) |
| 621 | { |
| 622 | if (i == 1 && (opcode->arg[1] != NO_ARG)) |
| 623 | info->fprintf_func (info->stream, ","); |
| 624 | maxq_print_arg (opcode->arg[i], info, grp); |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | /* DST is ABSENT in the grp. */ |
| 629 | if ((opcode->op_number > actual_operands) |
| 630 | && ((grp.flag & SRC) == SRC)) |
| 631 | { |
| 632 | maxq_print_arg (opcode->arg[0], info, grp); |
| 633 | info->fprintf_func (info->stream, " "); |
| 634 | |
| 635 | if (opcode->instr_id == 0xA4) |
| 636 | info->fprintf_func (info->stream, "LC[0]"); |
| 637 | |
| 638 | if (opcode->instr_id == 0xA5) |
| 639 | info->fprintf_func (info->stream, "LC[1]"); |
| 640 | |
| 641 | if ((grp.flag & SRC) == SRC) |
| 642 | info->fprintf_func (info->stream, ","); |
| 643 | } |
| 644 | |
| 645 | if ((grp.flag & DST) == DST) |
| 646 | { |
| 647 | if ((grp.flag & BIT_NO) == BIT_NO) |
| 648 | { |
| 649 | info->fprintf_func (info->stream, " %s.%d", |
| 650 | get_reg_name (grp.dst, |
| 651 | (type1) 0 /*DST*/), |
| 652 | grp.bit_no); |
| 653 | } |
| 654 | else |
| 655 | info->fprintf_func (info->stream, " %s", get_reg_name (grp.dst, (type1) 0)); |
| 656 | } |
| 657 | |
| 658 | /* SRC is ABSENT in the grp. */ |
| 659 | if ((opcode->op_number > actual_operands) |
| 660 | && ((grp.flag & DST) == DST)) |
| 661 | { |
| 662 | info->fprintf_func (info->stream, ","); |
| 663 | maxq_print_arg (opcode->arg[1], info, grp); |
| 664 | info->fprintf_func (info->stream, " "); |
| 665 | } |
| 666 | |
| 667 | if ((grp.flag & SRC) == SRC) |
| 668 | { |
| 669 | if ((grp.flag & DST) == DST) |
| 670 | info->fprintf_func (info->stream, ","); |
| 671 | |
| 672 | if ((grp.flag & BIT_NO) == BIT_NO) |
| 673 | { |
| 674 | format = opcode->format; |
| 675 | |
| 676 | if ((grp.flag & FORMAT) == FORMAT) |
| 677 | format = grp.fbit; |
| 678 | if (format == 1) |
| 679 | info->fprintf_func (info->stream, " %s.%d", |
| 680 | get_reg_name (grp.src, |
| 681 | (type1) 1 /*SRC*/), |
| 682 | grp.bit_no); |
| 683 | if (format == 0) |
| 684 | info->fprintf_func (info->stream, " #%02xh.%d", |
| 685 | (grp.src, SRC), grp.bit_no); |
| 686 | } |
| 687 | else |
| 688 | { |
| 689 | format = opcode->format; |
| 690 | |
| 691 | if ((grp.flag & FORMAT) == FORMAT) |
| 692 | format = grp.fbit; |
| 693 | if (format == 1) |
| 694 | info->fprintf_func (info->stream, " %s", |
| 695 | get_reg_name (grp.src, |
| 696 | (type1) 1 /*SRC*/)); |
| 697 | if (format == 0) |
| 698 | info->fprintf_func (info->stream, " #%02xh", |
| 699 | (grp.src)); |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | return 2; |
| 704 | } |
| 705 | } |
| 706 | |
| 707 | info->fprintf_func (info->stream, "Unable to Decode : %02x %02x", |
| 708 | insn[0], insn[1]); |
| 709 | return 2; |
| 710 | } |
| 711 | |
| 712 | int |
| 713 | print_insn_maxq_little (bfd_vma memaddr, struct disassemble_info *info) |
| 714 | { |
| 715 | return print_insn (memaddr, info, BFD_ENDIAN_LITTLE); |
| 716 | } |
| 717 | |