| 1 | /* Print instructions for the Texas TMS320C[34]X, for GDB and GNU Binutils. |
| 2 | |
| 3 | Copyright 2002 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Michael P. Hayes (m.hayes@elec.canterbury.ac.nz) |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include <math.h> |
| 22 | #include "libiberty.h" |
| 23 | #include "dis-asm.h" |
| 24 | #include "opcode/tic4x.h" |
| 25 | |
| 26 | #define C4X_DEBUG 0 |
| 27 | |
| 28 | #define C4X_HASH_SIZE 11 /* 11 and above should give unique entries. */ |
| 29 | |
| 30 | typedef enum |
| 31 | { |
| 32 | IMMED_SINT, |
| 33 | IMMED_SUINT, |
| 34 | IMMED_SFLOAT, |
| 35 | IMMED_INT, |
| 36 | IMMED_UINT, |
| 37 | IMMED_FLOAT |
| 38 | } |
| 39 | immed_t; |
| 40 | |
| 41 | typedef enum |
| 42 | { |
| 43 | INDIRECT_SHORT, |
| 44 | INDIRECT_LONG, |
| 45 | INDIRECT_C4X |
| 46 | } |
| 47 | indirect_t; |
| 48 | |
| 49 | static int c4x_version = 0; |
| 50 | static int c4x_dp = 0; |
| 51 | |
| 52 | static int |
| 53 | c4x_pc_offset (unsigned int op) |
| 54 | { |
| 55 | /* Determine the PC offset for a C[34]x instruction. |
| 56 | This could be simplified using some boolean algebra |
| 57 | but at the expense of readability. */ |
| 58 | switch (op >> 24) |
| 59 | { |
| 60 | case 0x60: /* br */ |
| 61 | case 0x62: /* call (C4x) */ |
| 62 | case 0x64: /* rptb (C4x) */ |
| 63 | return 1; |
| 64 | case 0x61: /* brd */ |
| 65 | case 0x63: /* laj */ |
| 66 | case 0x65: /* rptbd (C4x) */ |
| 67 | return 3; |
| 68 | case 0x66: /* swi */ |
| 69 | case 0x67: |
| 70 | return 0; |
| 71 | default: |
| 72 | break; |
| 73 | } |
| 74 | |
| 75 | switch ((op & 0xffe00000) >> 20) |
| 76 | { |
| 77 | case 0x6a0: /* bB */ |
| 78 | case 0x720: /* callB */ |
| 79 | case 0x740: /* trapB */ |
| 80 | return 1; |
| 81 | |
| 82 | case 0x6a2: /* bBd */ |
| 83 | case 0x6a6: /* bBat */ |
| 84 | case 0x6aa: /* bBaf */ |
| 85 | case 0x722: /* lajB */ |
| 86 | case 0x748: /* latB */ |
| 87 | case 0x798: /* rptbd */ |
| 88 | return 3; |
| 89 | |
| 90 | default: |
| 91 | break; |
| 92 | } |
| 93 | |
| 94 | switch ((op & 0xfe200000) >> 20) |
| 95 | { |
| 96 | case 0x6e0: /* dbB */ |
| 97 | return 1; |
| 98 | |
| 99 | case 0x6e2: /* dbBd */ |
| 100 | return 3; |
| 101 | |
| 102 | default: |
| 103 | break; |
| 104 | } |
| 105 | |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | static int |
| 110 | c4x_print_char (struct disassemble_info * info, char ch) |
| 111 | { |
| 112 | if (info != NULL) |
| 113 | (*info->fprintf_func) (info->stream, "%c", ch); |
| 114 | return 1; |
| 115 | } |
| 116 | |
| 117 | static int |
| 118 | c4x_print_str (struct disassemble_info *info, char *str) |
| 119 | { |
| 120 | if (info != NULL) |
| 121 | (*info->fprintf_func) (info->stream, "%s", str); |
| 122 | return 1; |
| 123 | } |
| 124 | |
| 125 | static int |
| 126 | c4x_print_register (struct disassemble_info *info, |
| 127 | unsigned long regno) |
| 128 | { |
| 129 | static c4x_register_t **registertable = NULL; |
| 130 | unsigned int i; |
| 131 | |
| 132 | if (registertable == NULL) |
| 133 | { |
| 134 | registertable = (c4x_register_t **) |
| 135 | xmalloc (sizeof (c4x_register_t *) * REG_TABLE_SIZE); |
| 136 | for (i = 0; i < c3x_num_registers; i++) |
| 137 | registertable[c3x_registers[i].regno] = (void *)&c3x_registers[i]; |
| 138 | if (IS_CPU_C4X (c4x_version)) |
| 139 | { |
| 140 | /* Add C4x additional registers, overwriting |
| 141 | any C3x registers if necessary. */ |
| 142 | for (i = 0; i < c4x_num_registers; i++) |
| 143 | registertable[c4x_registers[i].regno] = (void *)&c4x_registers[i]; |
| 144 | } |
| 145 | } |
| 146 | if ((int) regno > (IS_CPU_C4X (c4x_version) ? C4X_REG_MAX : C3X_REG_MAX)) |
| 147 | return 0; |
| 148 | if (info != NULL) |
| 149 | (*info->fprintf_func) (info->stream, "%s", registertable[regno]->name); |
| 150 | return 1; |
| 151 | } |
| 152 | |
| 153 | static int |
| 154 | c4x_print_addr (struct disassemble_info *info, |
| 155 | unsigned long addr) |
| 156 | { |
| 157 | if (info != NULL) |
| 158 | (*info->print_address_func)(addr, info); |
| 159 | return 1; |
| 160 | } |
| 161 | |
| 162 | static int |
| 163 | c4x_print_relative (struct disassemble_info *info, |
| 164 | unsigned long pc, |
| 165 | long offset, |
| 166 | unsigned long opcode) |
| 167 | { |
| 168 | return c4x_print_addr (info, pc + offset + c4x_pc_offset (opcode)); |
| 169 | } |
| 170 | |
| 171 | static int |
| 172 | c4x_print_direct (struct disassemble_info *info, |
| 173 | unsigned long arg) |
| 174 | { |
| 175 | if (info != NULL) |
| 176 | { |
| 177 | (*info->fprintf_func) (info->stream, "@"); |
| 178 | c4x_print_addr (info, arg + (c4x_dp << 16)); |
| 179 | } |
| 180 | return 1; |
| 181 | } |
| 182 | |
| 183 | /* FIXME: make the floating point stuff not rely on host |
| 184 | floating point arithmetic. */ |
| 185 | void |
| 186 | c4x_print_ftoa (unsigned int val, |
| 187 | FILE *stream, |
| 188 | int (*pfunc)()) |
| 189 | { |
| 190 | int e; |
| 191 | int s; |
| 192 | int f; |
| 193 | double num = 0.0; |
| 194 | |
| 195 | e = EXTRS (val, 31, 24); /* exponent */ |
| 196 | if (e != -128) |
| 197 | { |
| 198 | s = EXTRU (val, 23, 23); /* sign bit */ |
| 199 | f = EXTRU (val, 22, 0); /* mantissa */ |
| 200 | if (s) |
| 201 | f += -2 * (1 << 23); |
| 202 | else |
| 203 | f += (1 << 23); |
| 204 | num = f / (double)(1 << 23); |
| 205 | num = ldexp (num, e); |
| 206 | } |
| 207 | (*pfunc)(stream, "%.9g", num); |
| 208 | } |
| 209 | |
| 210 | static int |
| 211 | c4x_print_immed (struct disassemble_info *info, |
| 212 | immed_t type, |
| 213 | unsigned long arg) |
| 214 | { |
| 215 | int s; |
| 216 | int f; |
| 217 | int e; |
| 218 | double num = 0.0; |
| 219 | |
| 220 | if (info == NULL) |
| 221 | return 1; |
| 222 | switch (type) |
| 223 | { |
| 224 | case IMMED_SINT: |
| 225 | case IMMED_INT: |
| 226 | (*info->fprintf_func) (info->stream, "%d", (long)arg); |
| 227 | break; |
| 228 | |
| 229 | case IMMED_SUINT: |
| 230 | case IMMED_UINT: |
| 231 | (*info->fprintf_func) (info->stream, "%u", arg); |
| 232 | break; |
| 233 | |
| 234 | case IMMED_SFLOAT: |
| 235 | e = EXTRS (arg, 15, 12); |
| 236 | if (e != -8) |
| 237 | { |
| 238 | s = EXTRU (arg, 11, 11); |
| 239 | f = EXTRU (arg, 10, 0); |
| 240 | if (s) |
| 241 | f += -2 * (1 << 11); |
| 242 | else |
| 243 | f += (1 << 11); |
| 244 | num = f / (double)(1 << 11); |
| 245 | num = ldexp (num, e); |
| 246 | } |
| 247 | (*info->fprintf_func) (info->stream, "%f", num); |
| 248 | break; |
| 249 | case IMMED_FLOAT: |
| 250 | e = EXTRS (arg, 31, 24); |
| 251 | if (e != -128) |
| 252 | { |
| 253 | s = EXTRU (arg, 23, 23); |
| 254 | f = EXTRU (arg, 22, 0); |
| 255 | if (s) |
| 256 | f += -2 * (1 << 23); |
| 257 | else |
| 258 | f += (1 << 23); |
| 259 | num = f / (double)(1 << 23); |
| 260 | num = ldexp (num, e); |
| 261 | } |
| 262 | (*info->fprintf_func) (info->stream, "%f", num); |
| 263 | break; |
| 264 | } |
| 265 | return 1; |
| 266 | } |
| 267 | |
| 268 | static int |
| 269 | c4x_print_cond (struct disassemble_info *info, |
| 270 | unsigned int cond) |
| 271 | { |
| 272 | static c4x_cond_t **condtable = NULL; |
| 273 | unsigned int i; |
| 274 | |
| 275 | if (condtable == NULL) |
| 276 | { |
| 277 | condtable = (c4x_cond_t **)xmalloc (sizeof (c4x_cond_t *) * 32); |
| 278 | for (i = 0; i < num_conds; i++) |
| 279 | condtable[c4x_conds[i].cond] = (void *)&c4x_conds[i]; |
| 280 | } |
| 281 | if (cond > 31 || condtable[cond] == NULL) |
| 282 | return 0; |
| 283 | if (info != NULL) |
| 284 | (*info->fprintf_func) (info->stream, "%s", condtable[cond]->name); |
| 285 | return 1; |
| 286 | } |
| 287 | |
| 288 | static int |
| 289 | c4x_print_indirect (struct disassemble_info *info, |
| 290 | indirect_t type, |
| 291 | unsigned long arg) |
| 292 | { |
| 293 | unsigned int aregno; |
| 294 | unsigned int modn; |
| 295 | unsigned int disp; |
| 296 | char *a; |
| 297 | |
| 298 | aregno = 0; |
| 299 | modn = 0; |
| 300 | disp = 1; |
| 301 | switch(type) |
| 302 | { |
| 303 | case INDIRECT_C4X: /* *+ARn(disp) */ |
| 304 | disp = EXTRU (arg, 7, 3); |
| 305 | aregno = EXTRU (arg, 2, 0) + REG_AR0; |
| 306 | modn = 0; |
| 307 | break; |
| 308 | case INDIRECT_SHORT: |
| 309 | disp = 1; |
| 310 | aregno = EXTRU (arg, 2, 0) + REG_AR0; |
| 311 | modn = EXTRU (arg, 7, 3); |
| 312 | break; |
| 313 | case INDIRECT_LONG: |
| 314 | disp = EXTRU (arg, 7, 0); |
| 315 | aregno = EXTRU (arg, 10, 8) + REG_AR0; |
| 316 | modn = EXTRU (arg, 15, 11); |
| 317 | if (modn > 7 && disp != 0) |
| 318 | return 0; |
| 319 | break; |
| 320 | default: |
| 321 | abort (); |
| 322 | } |
| 323 | if (modn > C3X_MODN_MAX) |
| 324 | return 0; |
| 325 | a = c4x_indirects[modn].name; |
| 326 | while (*a) |
| 327 | { |
| 328 | switch (*a) |
| 329 | { |
| 330 | case 'a': |
| 331 | c4x_print_register (info, aregno); |
| 332 | break; |
| 333 | case 'd': |
| 334 | c4x_print_immed (info, IMMED_UINT, disp); |
| 335 | break; |
| 336 | case 'y': |
| 337 | c4x_print_str (info, "ir0"); |
| 338 | break; |
| 339 | case 'z': |
| 340 | c4x_print_str (info, "ir1"); |
| 341 | break; |
| 342 | default: |
| 343 | c4x_print_char (info, *a); |
| 344 | break; |
| 345 | } |
| 346 | a++; |
| 347 | } |
| 348 | return 1; |
| 349 | } |
| 350 | |
| 351 | static int |
| 352 | c4x_print_op (struct disassemble_info *info, |
| 353 | unsigned long instruction, |
| 354 | c4x_inst_t *p, unsigned long pc) |
| 355 | { |
| 356 | int val; |
| 357 | char *s; |
| 358 | char *parallel = NULL; |
| 359 | |
| 360 | /* Print instruction name. */ |
| 361 | s = p->name; |
| 362 | while (*s && parallel == NULL) |
| 363 | { |
| 364 | switch (*s) |
| 365 | { |
| 366 | case 'B': |
| 367 | if (! c4x_print_cond (info, EXTRU (instruction, 20, 16))) |
| 368 | return 0; |
| 369 | break; |
| 370 | case 'C': |
| 371 | if (! c4x_print_cond (info, EXTRU (instruction, 27, 23))) |
| 372 | return 0; |
| 373 | break; |
| 374 | case '_': |
| 375 | parallel = s + 1; /* Skip past `_' in name */ |
| 376 | break; |
| 377 | default: |
| 378 | c4x_print_char (info, *s); |
| 379 | break; |
| 380 | } |
| 381 | s++; |
| 382 | } |
| 383 | |
| 384 | /* Print arguments. */ |
| 385 | s = p->args; |
| 386 | if (*s) |
| 387 | c4x_print_char (info, ' '); |
| 388 | |
| 389 | while (*s) |
| 390 | { |
| 391 | switch (*s) |
| 392 | { |
| 393 | case '*': /* indirect 0--15 */ |
| 394 | if (! c4x_print_indirect (info, INDIRECT_LONG, |
| 395 | EXTRU (instruction, 15, 0))) |
| 396 | return 0; |
| 397 | break; |
| 398 | |
| 399 | case '#': /* only used for ldp, ldpk */ |
| 400 | c4x_print_immed (info, IMMED_UINT, EXTRU (instruction, 15, 0)); |
| 401 | break; |
| 402 | |
| 403 | case '@': /* direct 0--15 */ |
| 404 | c4x_print_direct (info, EXTRU (instruction, 15, 0)); |
| 405 | break; |
| 406 | |
| 407 | case 'A': /* address register 24--22 */ |
| 408 | if (! c4x_print_register (info, EXTRU (instruction, 24, 22) + |
| 409 | REG_AR0)) |
| 410 | return 0; |
| 411 | break; |
| 412 | |
| 413 | case 'B': /* 24-bit unsigned int immediate br(d)/call/rptb |
| 414 | address 0--23. */ |
| 415 | if (IS_CPU_C4X (c4x_version)) |
| 416 | c4x_print_relative (info, pc, EXTRS (instruction, 23, 0), |
| 417 | p->opcode); |
| 418 | else |
| 419 | c4x_print_addr (info, EXTRU (instruction, 23, 0)); |
| 420 | break; |
| 421 | |
| 422 | case 'C': /* indirect (short C4x) 0--7 */ |
| 423 | if (! IS_CPU_C4X (c4x_version)) |
| 424 | return 0; |
| 425 | if (! c4x_print_indirect (info, INDIRECT_C4X, |
| 426 | EXTRU (instruction, 7, 0))) |
| 427 | return 0; |
| 428 | break; |
| 429 | |
| 430 | case 'D': |
| 431 | /* Cockup if get here... */ |
| 432 | break; |
| 433 | |
| 434 | case 'E': /* register 0--7 */ |
| 435 | if (! c4x_print_register (info, EXTRU (instruction, 7, 0))) |
| 436 | return 0; |
| 437 | break; |
| 438 | |
| 439 | case 'F': /* 16-bit float immediate 0--15 */ |
| 440 | c4x_print_immed (info, IMMED_SFLOAT, |
| 441 | EXTRU (instruction, 15, 0)); |
| 442 | break; |
| 443 | |
| 444 | case 'I': /* indirect (short) 0--7 */ |
| 445 | if (! c4x_print_indirect (info, INDIRECT_SHORT, |
| 446 | EXTRU (instruction, 7, 0))) |
| 447 | return 0; |
| 448 | break; |
| 449 | |
| 450 | case 'J': /* indirect (short) 8--15 */ |
| 451 | if (! c4x_print_indirect (info, INDIRECT_SHORT, |
| 452 | EXTRU (instruction, 15, 8))) |
| 453 | return 0; |
| 454 | break; |
| 455 | |
| 456 | case 'G': /* register 8--15 */ |
| 457 | if (! c4x_print_register (info, EXTRU (instruction, 15, 8))) |
| 458 | return 0; |
| 459 | break; |
| 460 | |
| 461 | case 'H': /* register 16--18 */ |
| 462 | if (! c4x_print_register (info, EXTRU (instruction, 18, 16))) |
| 463 | return 0; |
| 464 | break; |
| 465 | |
| 466 | case 'K': /* register 19--21 */ |
| 467 | if (! c4x_print_register (info, EXTRU (instruction, 21, 19))) |
| 468 | return 0; |
| 469 | break; |
| 470 | |
| 471 | case 'L': /* register 22--24 */ |
| 472 | if (! c4x_print_register (info, EXTRU (instruction, 24, 22))) |
| 473 | return 0; |
| 474 | break; |
| 475 | |
| 476 | case 'M': /* register 22--22 */ |
| 477 | c4x_print_register (info, EXTRU (instruction, 22, 22) + REG_R2); |
| 478 | break; |
| 479 | |
| 480 | case 'N': /* register 23--23 */ |
| 481 | c4x_print_register (info, EXTRU (instruction, 22, 22) + REG_R0); |
| 482 | break; |
| 483 | |
| 484 | case 'O': /* indirect (short C4x) 8--15 */ |
| 485 | if (! IS_CPU_C4X (c4x_version)) |
| 486 | return 0; |
| 487 | if (! c4x_print_indirect (info, INDIRECT_C4X, |
| 488 | EXTRU (instruction, 15, 8))) |
| 489 | return 0; |
| 490 | break; |
| 491 | |
| 492 | case 'P': /* displacement 0--15 (used by Bcond and BcondD) */ |
| 493 | c4x_print_relative (info, pc, EXTRS (instruction, 15, 0), |
| 494 | p->opcode); |
| 495 | break; |
| 496 | |
| 497 | case 'Q': /* register 0--15 */ |
| 498 | if (! c4x_print_register (info, EXTRU (instruction, 15, 0))) |
| 499 | return 0; |
| 500 | break; |
| 501 | |
| 502 | case 'R': /* register 16--20 */ |
| 503 | if (! c4x_print_register (info, EXTRU (instruction, 20, 16))) |
| 504 | return 0; |
| 505 | break; |
| 506 | |
| 507 | case 'S': /* 16-bit signed immediate 0--15 */ |
| 508 | c4x_print_immed (info, IMMED_SINT, |
| 509 | EXTRS (instruction, 15, 0)); |
| 510 | break; |
| 511 | |
| 512 | case 'T': /* 5-bit signed immediate 16--20 (C4x stik) */ |
| 513 | if (! IS_CPU_C4X (c4x_version)) |
| 514 | return 0; |
| 515 | if (! c4x_print_immed (info, IMMED_SUINT, |
| 516 | EXTRU (instruction, 20, 16))) |
| 517 | return 0; |
| 518 | break; |
| 519 | |
| 520 | case 'U': /* 16-bit unsigned int immediate 0--15 */ |
| 521 | c4x_print_immed (info, IMMED_SUINT, EXTRU (instruction, 15, 0)); |
| 522 | break; |
| 523 | |
| 524 | case 'V': /* 5/9-bit unsigned vector 0--4/8 */ |
| 525 | c4x_print_immed (info, IMMED_SUINT, |
| 526 | IS_CPU_C4X (c4x_version) ? |
| 527 | EXTRU (instruction, 8, 0) : |
| 528 | EXTRU (instruction, 4, 0) & ~0x20); |
| 529 | break; |
| 530 | |
| 531 | case 'W': /* 8-bit signed immediate 0--7 */ |
| 532 | if (! IS_CPU_C4X (c4x_version)) |
| 533 | return 0; |
| 534 | c4x_print_immed (info, IMMED_SINT, EXTRS (instruction, 7, 0)); |
| 535 | break; |
| 536 | |
| 537 | case 'X': /* expansion register 4--0 */ |
| 538 | val = EXTRU (instruction, 4, 0) + REG_IVTP; |
| 539 | if (val < REG_IVTP || val > REG_TVTP) |
| 540 | return 0; |
| 541 | if (! c4x_print_register (info, val)) |
| 542 | return 0; |
| 543 | break; |
| 544 | |
| 545 | case 'Y': /* address register 16--20 */ |
| 546 | val = EXTRU (instruction, 20, 16); |
| 547 | if (val < REG_AR0 || val > REG_SP) |
| 548 | return 0; |
| 549 | if (! c4x_print_register (info, val)) |
| 550 | return 0; |
| 551 | break; |
| 552 | |
| 553 | case 'Z': /* expansion register 16--20 */ |
| 554 | val = EXTRU (instruction, 20, 16) + REG_IVTP; |
| 555 | if (val < REG_IVTP || val > REG_TVTP) |
| 556 | return 0; |
| 557 | if (! c4x_print_register (info, val)) |
| 558 | return 0; |
| 559 | break; |
| 560 | |
| 561 | case '|': /* Parallel instruction */ |
| 562 | c4x_print_str (info, " || "); |
| 563 | c4x_print_str (info, parallel); |
| 564 | c4x_print_char (info, ' '); |
| 565 | break; |
| 566 | |
| 567 | case ';': |
| 568 | c4x_print_char (info, ','); |
| 569 | break; |
| 570 | |
| 571 | default: |
| 572 | c4x_print_char (info, *s); |
| 573 | break; |
| 574 | } |
| 575 | s++; |
| 576 | } |
| 577 | return 1; |
| 578 | } |
| 579 | |
| 580 | static void |
| 581 | c4x_hash_opcode (c4x_inst_t **optable, |
| 582 | const c4x_inst_t *inst) |
| 583 | { |
| 584 | int j; |
| 585 | int opcode = inst->opcode >> (32 - C4X_HASH_SIZE); |
| 586 | int opmask = inst->opmask >> (32 - C4X_HASH_SIZE); |
| 587 | |
| 588 | /* Use a C4X_HASH_SIZE bit index as a hash index. We should |
| 589 | have unique entries so there's no point having a linked list |
| 590 | for each entry? */ |
| 591 | for (j = opcode; j < opmask; j++) |
| 592 | if ((j & opmask) == opcode) |
| 593 | { |
| 594 | #if C4X_DEBUG |
| 595 | /* We should only have collisions for synonyms like |
| 596 | ldp for ldi. */ |
| 597 | if (optable[j] != NULL) |
| 598 | printf("Collision at index %d, %s and %s\n", |
| 599 | j, optable[j]->name, inst->name); |
| 600 | #endif |
| 601 | optable[j] = (void *)inst; |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | /* Disassemble the instruction in 'instruction'. |
| 606 | 'pc' should be the address of this instruction, it will |
| 607 | be used to print the target address if this is a relative jump or call |
| 608 | the disassembled instruction is written to 'info'. |
| 609 | The function returns the length of this instruction in words. */ |
| 610 | |
| 611 | static int |
| 612 | c4x_disassemble (unsigned long pc, |
| 613 | unsigned long instruction, |
| 614 | struct disassemble_info *info) |
| 615 | { |
| 616 | static c4x_inst_t **optable = NULL; |
| 617 | c4x_inst_t *p; |
| 618 | int i; |
| 619 | |
| 620 | c4x_version = info->mach; |
| 621 | |
| 622 | if (optable == NULL) |
| 623 | { |
| 624 | optable = (c4x_inst_t **) |
| 625 | xcalloc (sizeof (c4x_inst_t *), (1 << C4X_HASH_SIZE)); |
| 626 | /* Install opcodes in reverse order so that preferred |
| 627 | forms overwrite synonyms. */ |
| 628 | for (i = c3x_num_insts - 1; i >= 0; i--) |
| 629 | c4x_hash_opcode (optable, &c3x_insts[i]); |
| 630 | if (IS_CPU_C4X (c4x_version)) |
| 631 | { |
| 632 | for (i = c4x_num_insts - 1; i >= 0; i--) |
| 633 | c4x_hash_opcode (optable, &c4x_insts[i]); |
| 634 | } |
| 635 | } |
| 636 | |
| 637 | /* See if we can pick up any loading of the DP register... */ |
| 638 | if ((instruction >> 16) == 0x5070 || (instruction >> 16) == 0x1f70) |
| 639 | c4x_dp = EXTRU (instruction, 15, 0); |
| 640 | |
| 641 | p = optable[instruction >> (32 - C4X_HASH_SIZE)]; |
| 642 | if (p != NULL && ((instruction & p->opmask) == p->opcode) |
| 643 | && c4x_print_op (NULL, instruction, p, pc)) |
| 644 | c4x_print_op (info, instruction, p, pc); |
| 645 | else |
| 646 | (*info->fprintf_func) (info->stream, "%08x", instruction); |
| 647 | |
| 648 | /* Return size of insn in words. */ |
| 649 | return 1; |
| 650 | } |
| 651 | |
| 652 | /* The entry point from objdump and gdb. */ |
| 653 | int |
| 654 | print_insn_tic4x (memaddr, info) |
| 655 | bfd_vma memaddr; |
| 656 | struct disassemble_info *info; |
| 657 | { |
| 658 | int status; |
| 659 | unsigned long pc; |
| 660 | unsigned long op; |
| 661 | bfd_byte buffer[4]; |
| 662 | |
| 663 | status = (*info->read_memory_func) (memaddr, buffer, 4, info); |
| 664 | if (status != 0) |
| 665 | { |
| 666 | (*info->memory_error_func) (status, memaddr, info); |
| 667 | return -1; |
| 668 | } |
| 669 | |
| 670 | pc = memaddr; |
| 671 | op = bfd_getl32 (buffer); |
| 672 | info->bytes_per_line = 4; |
| 673 | info->bytes_per_chunk = 4; |
| 674 | info->octets_per_byte = 4; |
| 675 | info->display_endian = BFD_ENDIAN_LITTLE; |
| 676 | return c4x_disassemble (pc, op, info) * 4; |
| 677 | } |