| 1 | /* Disassemble MSP430 instructions. |
| 2 | Copyright (C) 2002-2015 Free Software Foundation, Inc. |
| 3 | |
| 4 | Contributed by Dmitry Diky <diwil@mail.ru> |
| 5 | |
| 6 | This file is part of the GNU opcodes library. |
| 7 | |
| 8 | This library is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3, or (at your option) |
| 11 | any later version. |
| 12 | |
| 13 | It is distributed in the hope that it will be useful, but WITHOUT |
| 14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| 16 | License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | MA 02110-1301, USA. */ |
| 22 | |
| 23 | #include "sysdep.h" |
| 24 | #include <stdio.h> |
| 25 | #include <ctype.h> |
| 26 | #include <sys/types.h> |
| 27 | |
| 28 | #include "dis-asm.h" |
| 29 | #include "opintl.h" |
| 30 | #include "libiberty.h" |
| 31 | |
| 32 | #define DASM_SECTION |
| 33 | #include "opcode/msp430.h" |
| 34 | #undef DASM_SECTION |
| 35 | |
| 36 | |
| 37 | #define PS(x) (0xffff & (x)) |
| 38 | |
| 39 | static unsigned short |
| 40 | msp430dis_opcode (bfd_vma addr, disassemble_info *info) |
| 41 | { |
| 42 | bfd_byte buffer[2]; |
| 43 | int status; |
| 44 | |
| 45 | status = info->read_memory_func (addr, buffer, 2, info); |
| 46 | if (status != 0) |
| 47 | { |
| 48 | info->memory_error_func (status, addr, info); |
| 49 | return -1; |
| 50 | } |
| 51 | return bfd_getl16 (buffer); |
| 52 | } |
| 53 | |
| 54 | static int |
| 55 | msp430_nooperands (struct msp430_opcode_s *opcode, |
| 56 | bfd_vma addr ATTRIBUTE_UNUSED, |
| 57 | unsigned short insn ATTRIBUTE_UNUSED, |
| 58 | char *comm, |
| 59 | int *cycles) |
| 60 | { |
| 61 | /* Pop with constant. */ |
| 62 | if (insn == 0x43b2) |
| 63 | return 0; |
| 64 | if (insn == opcode->bin_opcode) |
| 65 | return 2; |
| 66 | |
| 67 | if (opcode->fmt == 0) |
| 68 | { |
| 69 | if ((insn & 0x0f00) != 3 || (insn & 0x0f00) != 2) |
| 70 | return 0; |
| 71 | |
| 72 | strcpy (comm, "emulated..."); |
| 73 | *cycles = 1; |
| 74 | } |
| 75 | else |
| 76 | { |
| 77 | strcpy (comm, "return from interupt"); |
| 78 | *cycles = 5; |
| 79 | } |
| 80 | |
| 81 | return 2; |
| 82 | } |
| 83 | |
| 84 | static int |
| 85 | print_as2_reg_name (int regno, char * op1, char * comm1, |
| 86 | int c2, int c3, int cd) |
| 87 | { |
| 88 | switch (regno) |
| 89 | { |
| 90 | case 2: |
| 91 | sprintf (op1, "#4"); |
| 92 | sprintf (comm1, "r2 As==10"); |
| 93 | return c2; |
| 94 | |
| 95 | case 3: |
| 96 | sprintf (op1, "#2"); |
| 97 | sprintf (comm1, "r3 As==10"); |
| 98 | return c3; |
| 99 | |
| 100 | default: |
| 101 | /* Indexed register mode @Rn. */ |
| 102 | sprintf (op1, "@r%d", regno); |
| 103 | return cd; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | static int |
| 108 | print_as3_reg_name (int regno, char * op1, char * comm1, |
| 109 | int c2, int c3, int cd) |
| 110 | { |
| 111 | switch (regno) |
| 112 | { |
| 113 | case 2: |
| 114 | sprintf (op1, "#8"); |
| 115 | sprintf (comm1, "r2 As==11"); |
| 116 | return c2; |
| 117 | |
| 118 | case 3: |
| 119 | sprintf (op1, "#-1"); |
| 120 | sprintf (comm1, "r3 As==11"); |
| 121 | return c3; |
| 122 | |
| 123 | default: |
| 124 | /* Post incremented @Rn+. */ |
| 125 | sprintf (op1, "@r%d+", regno); |
| 126 | return cd; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | static int |
| 131 | msp430_singleoperand (disassemble_info *info, |
| 132 | struct msp430_opcode_s *opcode, |
| 133 | bfd_vma addr, |
| 134 | unsigned short insn, |
| 135 | char *op, |
| 136 | char *comm, |
| 137 | unsigned short extension_word, |
| 138 | int *cycles) |
| 139 | { |
| 140 | int regs = 0, regd = 0; |
| 141 | int ad = 0, as = 0; |
| 142 | int where = 0; |
| 143 | int cmd_len = 2; |
| 144 | int dst = 0; |
| 145 | int fmt; |
| 146 | int extended_dst = extension_word & 0xf; |
| 147 | |
| 148 | regd = insn & 0x0f; |
| 149 | regs = (insn & 0x0f00) >> 8; |
| 150 | as = (insn & 0x0030) >> 4; |
| 151 | ad = (insn & 0x0080) >> 7; |
| 152 | |
| 153 | if (opcode->fmt < 0) |
| 154 | fmt = (- opcode->fmt) - 1; |
| 155 | else |
| 156 | fmt = opcode->fmt; |
| 157 | |
| 158 | switch (fmt) |
| 159 | { |
| 160 | case 0: /* Emulated work with dst register. */ |
| 161 | if (regs != 2 && regs != 3 && regs != 1) |
| 162 | return 0; |
| 163 | |
| 164 | /* Check if not clr insn. */ |
| 165 | if (opcode->bin_opcode == 0x4300 && (ad || as)) |
| 166 | return 0; |
| 167 | |
| 168 | /* Check if really inc, incd insns. */ |
| 169 | if ((opcode->bin_opcode & 0xff00) == 0x5300 && as == 3) |
| 170 | return 0; |
| 171 | |
| 172 | if (ad == 0) |
| 173 | { |
| 174 | *cycles = 1; |
| 175 | |
| 176 | /* Register. */ |
| 177 | if (regd == 0) |
| 178 | { |
| 179 | *cycles += 1; |
| 180 | sprintf (op, "r0"); |
| 181 | } |
| 182 | else if (regd == 1) |
| 183 | sprintf (op, "r1"); |
| 184 | |
| 185 | else if (regd == 2) |
| 186 | sprintf (op, "r2"); |
| 187 | |
| 188 | else |
| 189 | sprintf (op, "r%d", regd); |
| 190 | } |
| 191 | else /* ad == 1 msp430dis_opcode. */ |
| 192 | { |
| 193 | if (regd == 0) |
| 194 | { |
| 195 | /* PC relative. */ |
| 196 | dst = msp430dis_opcode (addr + 2, info); |
| 197 | cmd_len += 2; |
| 198 | *cycles = 4; |
| 199 | sprintf (op, "0x%04x", dst); |
| 200 | sprintf (comm, "PC rel. abs addr 0x%04x", |
| 201 | PS ((short) (addr + 2) + dst)); |
| 202 | if (extended_dst) |
| 203 | { |
| 204 | dst |= extended_dst << 16; |
| 205 | sprintf (op, "0x%05x", dst); |
| 206 | sprintf (comm, "PC rel. abs addr 0x%05lx", |
| 207 | (long)((addr + 2 + dst) & 0xfffff)); |
| 208 | } |
| 209 | } |
| 210 | else if (regd == 2) |
| 211 | { |
| 212 | /* Absolute. */ |
| 213 | dst = msp430dis_opcode (addr + 2, info); |
| 214 | cmd_len += 2; |
| 215 | *cycles = 4; |
| 216 | sprintf (op, "&0x%04x", PS (dst)); |
| 217 | if (extended_dst) |
| 218 | { |
| 219 | dst |= extended_dst << 16; |
| 220 | sprintf (op, "&0x%05x", dst & 0xfffff); |
| 221 | } |
| 222 | } |
| 223 | else |
| 224 | { |
| 225 | dst = msp430dis_opcode (addr + 2, info); |
| 226 | cmd_len += 2; |
| 227 | *cycles = 4; |
| 228 | if (extended_dst) |
| 229 | { |
| 230 | dst |= extended_dst << 16; |
| 231 | if (dst & 0x80000) |
| 232 | dst |= -1 << 20; |
| 233 | } |
| 234 | else if (dst & 0x8000) |
| 235 | dst |= -1 << 16; |
| 236 | sprintf (op, "%d(r%d)", dst, regd); |
| 237 | } |
| 238 | } |
| 239 | break; |
| 240 | |
| 241 | case 2: /* rrc, push, call, swpb, rra, sxt, push, call, reti etc... */ |
| 242 | if (as == 0) |
| 243 | { |
| 244 | if (regd == 3) |
| 245 | { |
| 246 | /* Constsnts. */ |
| 247 | sprintf (op, "#0"); |
| 248 | sprintf (comm, "r3 As==00"); |
| 249 | } |
| 250 | else |
| 251 | { |
| 252 | /* Register. */ |
| 253 | sprintf (op, "r%d", regd); |
| 254 | } |
| 255 | *cycles = 1; |
| 256 | } |
| 257 | else if (as == 2) |
| 258 | { |
| 259 | * cycles = print_as2_reg_name (regd, op, comm, 1, 1, 3); |
| 260 | } |
| 261 | else if (as == 3) |
| 262 | { |
| 263 | if (regd == 0) |
| 264 | { |
| 265 | *cycles = 3; |
| 266 | /* absolute. @pc+ */ |
| 267 | dst = msp430dis_opcode (addr + 2, info); |
| 268 | cmd_len += 2; |
| 269 | sprintf (op, "#%d", dst); |
| 270 | if (dst > 9 || dst < 0) |
| 271 | sprintf (comm, "#0x%04x", PS (dst)); |
| 272 | if (extended_dst) |
| 273 | { |
| 274 | dst |= extended_dst << 16; |
| 275 | if (dst & 0x80000) |
| 276 | dst |= -1 << 20; |
| 277 | sprintf (op, "#%d", dst); |
| 278 | if (dst > 9 || dst < 0) |
| 279 | sprintf (comm, "#0x%05x", dst); |
| 280 | } |
| 281 | } |
| 282 | else |
| 283 | * cycles = print_as3_reg_name (regd, op, comm, 1, 1, 3); |
| 284 | } |
| 285 | else if (as == 1) |
| 286 | { |
| 287 | *cycles = 4; |
| 288 | if (regd == 0) |
| 289 | { |
| 290 | /* PC relative. */ |
| 291 | dst = msp430dis_opcode (addr + 2, info); |
| 292 | cmd_len += 2; |
| 293 | sprintf (op, "0x%04x", PS (dst)); |
| 294 | sprintf (comm, "PC rel. 0x%04x", |
| 295 | PS ((short) addr + 2 + dst)); |
| 296 | if (extended_dst) |
| 297 | { |
| 298 | dst |= extended_dst << 16; |
| 299 | sprintf (op, "0x%05x", dst & 0xffff); |
| 300 | sprintf (comm, "PC rel. 0x%05lx", |
| 301 | (long)((addr + 2 + dst) & 0xfffff)); |
| 302 | } |
| 303 | } |
| 304 | else if (regd == 2) |
| 305 | { |
| 306 | /* Absolute. */ |
| 307 | dst = msp430dis_opcode (addr + 2, info); |
| 308 | cmd_len += 2; |
| 309 | sprintf (op, "&0x%04x", PS (dst)); |
| 310 | if (extended_dst) |
| 311 | { |
| 312 | dst |= extended_dst << 16; |
| 313 | sprintf (op, "&0x%05x", dst & 0xfffff); |
| 314 | } |
| 315 | } |
| 316 | else if (regd == 3) |
| 317 | { |
| 318 | *cycles = 1; |
| 319 | sprintf (op, "#1"); |
| 320 | sprintf (comm, "r3 As==01"); |
| 321 | } |
| 322 | else |
| 323 | { |
| 324 | /* Indexed. */ |
| 325 | dst = msp430dis_opcode (addr + 2, info); |
| 326 | cmd_len += 2; |
| 327 | if (extended_dst) |
| 328 | { |
| 329 | dst |= extended_dst << 16; |
| 330 | if (dst & 0x80000) |
| 331 | dst |= -1 << 20; |
| 332 | } |
| 333 | else if (dst & 0x8000) |
| 334 | dst |= -1 << 16; |
| 335 | sprintf (op, "%d(r%d)", dst, regd); |
| 336 | if (dst > 9 || dst < 0) |
| 337 | sprintf (comm, "%05x", dst); |
| 338 | } |
| 339 | } |
| 340 | break; |
| 341 | |
| 342 | case 3: /* Jumps. */ |
| 343 | where = insn & 0x03ff; |
| 344 | if (where & 0x200) |
| 345 | where |= ~0x03ff; |
| 346 | if (where > 512 || where < -511) |
| 347 | return 0; |
| 348 | |
| 349 | where *= 2; |
| 350 | sprintf (op, "$%+-8d", where + 2); |
| 351 | sprintf (comm, "abs 0x%lx", (long) (addr + 2 + where)); |
| 352 | *cycles = 2; |
| 353 | return 2; |
| 354 | break; |
| 355 | default: |
| 356 | cmd_len = 0; |
| 357 | } |
| 358 | |
| 359 | return cmd_len; |
| 360 | } |
| 361 | |
| 362 | static int |
| 363 | msp430_doubleoperand (disassemble_info *info, |
| 364 | struct msp430_opcode_s *opcode, |
| 365 | bfd_vma addr, |
| 366 | unsigned short insn, |
| 367 | char *op1, |
| 368 | char *op2, |
| 369 | char *comm1, |
| 370 | char *comm2, |
| 371 | unsigned short extension_word, |
| 372 | int *cycles) |
| 373 | { |
| 374 | int regs = 0, regd = 0; |
| 375 | int ad = 0, as = 0; |
| 376 | int cmd_len = 2; |
| 377 | int dst = 0; |
| 378 | int fmt; |
| 379 | int extended_dst = extension_word & 0xf; |
| 380 | int extended_src = (extension_word >> 7) & 0xf; |
| 381 | |
| 382 | regd = insn & 0x0f; |
| 383 | regs = (insn & 0x0f00) >> 8; |
| 384 | as = (insn & 0x0030) >> 4; |
| 385 | ad = (insn & 0x0080) >> 7; |
| 386 | |
| 387 | if (opcode->fmt < 0) |
| 388 | fmt = (- opcode->fmt) - 1; |
| 389 | else |
| 390 | fmt = opcode->fmt; |
| 391 | |
| 392 | if (fmt == 0) |
| 393 | { |
| 394 | /* Special case: rla and rlc are the only 2 emulated instructions that |
| 395 | fall into two operand instructions. */ |
| 396 | /* With dst, there are only: |
| 397 | Rm Register, |
| 398 | x(Rm) Indexed, |
| 399 | 0xXXXX Relative, |
| 400 | &0xXXXX Absolute |
| 401 | emulated_ins dst |
| 402 | basic_ins dst, dst. */ |
| 403 | |
| 404 | if (regd != regs || as != ad) |
| 405 | return 0; /* May be 'data' section. */ |
| 406 | |
| 407 | if (ad == 0) |
| 408 | { |
| 409 | /* Register mode. */ |
| 410 | if (regd == 3) |
| 411 | { |
| 412 | strcpy (comm1, _("Illegal as emulation instr")); |
| 413 | return -1; |
| 414 | } |
| 415 | |
| 416 | sprintf (op1, "r%d", regd); |
| 417 | *cycles = 1; |
| 418 | } |
| 419 | else /* ad == 1 */ |
| 420 | { |
| 421 | if (regd == 0) |
| 422 | { |
| 423 | /* PC relative, Symbolic. */ |
| 424 | dst = msp430dis_opcode (addr + 2, info); |
| 425 | cmd_len += 4; |
| 426 | *cycles = 6; |
| 427 | sprintf (op1, "0x%04x", PS (dst)); |
| 428 | sprintf (comm1, "PC rel. 0x%04x", |
| 429 | PS ((short) addr + 2 + dst)); |
| 430 | if (extension_word) |
| 431 | { |
| 432 | dst |= extended_dst << 16; |
| 433 | if (dst & 0x80000) |
| 434 | dst |= -1 << 20; |
| 435 | sprintf (op1, "0x%05x", dst & 0xfffff); |
| 436 | sprintf (comm1, "PC rel. 0x%05lx", |
| 437 | (long)((addr + 2 + dst) & 0xfffff)); |
| 438 | } |
| 439 | } |
| 440 | else if (regd == 2) |
| 441 | { |
| 442 | /* Absolute. */ |
| 443 | dst = msp430dis_opcode (addr + 2, info); |
| 444 | /* If the 'src' field is not the same as the dst |
| 445 | then this is not an rla instruction. */ |
| 446 | if (dst != msp430dis_opcode (addr + 4, info)) |
| 447 | return 0; |
| 448 | cmd_len += 4; |
| 449 | *cycles = 6; |
| 450 | sprintf (op1, "&0x%04x", PS (dst)); |
| 451 | if (extension_word) |
| 452 | { |
| 453 | dst |= extended_dst << 16; |
| 454 | sprintf (op1, "&0x%05x", dst & 0xfffff); |
| 455 | } |
| 456 | } |
| 457 | else |
| 458 | { |
| 459 | /* Indexed. */ |
| 460 | dst = msp430dis_opcode (addr + 2, info); |
| 461 | if (extension_word) |
| 462 | { |
| 463 | dst |= extended_dst << 16; |
| 464 | if (dst & 0x80000) |
| 465 | dst |= -1 << 20; |
| 466 | } |
| 467 | else if (dst & 0x8000) |
| 468 | dst |= -1 << 16; |
| 469 | cmd_len += 4; |
| 470 | *cycles = 6; |
| 471 | sprintf (op1, "%d(r%d)", dst, regd); |
| 472 | if (dst > 9 || dst < -9) |
| 473 | sprintf (comm1, "#0x%05x", dst); |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | *op2 = 0; |
| 478 | *comm2 = 0; |
| 479 | |
| 480 | return cmd_len; |
| 481 | } |
| 482 | |
| 483 | /* Two operands exactly. */ |
| 484 | if (ad == 0 && regd == 3) |
| 485 | { |
| 486 | /* R2/R3 are illegal as dest: may be data section. */ |
| 487 | strcpy (comm1, _("Illegal as 2-op instr")); |
| 488 | return -1; |
| 489 | } |
| 490 | |
| 491 | /* Source. */ |
| 492 | if (as == 0) |
| 493 | { |
| 494 | *cycles = 1; |
| 495 | if (regs == 3) |
| 496 | { |
| 497 | /* Constants. */ |
| 498 | sprintf (op1, "#0"); |
| 499 | sprintf (comm1, "r3 As==00"); |
| 500 | } |
| 501 | else |
| 502 | { |
| 503 | /* Register. */ |
| 504 | sprintf (op1, "r%d", regs); |
| 505 | } |
| 506 | } |
| 507 | else if (as == 2) |
| 508 | { |
| 509 | * cycles = print_as2_reg_name (regs, op1, comm1, 1, 1, regs == 0 ? 3 : 2); |
| 510 | } |
| 511 | else if (as == 3) |
| 512 | { |
| 513 | if (regs == 0) |
| 514 | { |
| 515 | *cycles = 3; |
| 516 | /* Absolute. @pc+. */ |
| 517 | dst = msp430dis_opcode (addr + 2, info); |
| 518 | cmd_len += 2; |
| 519 | sprintf (op1, "#%d", dst); |
| 520 | if (dst > 9 || dst < 0) |
| 521 | sprintf (comm1, "#0x%04x", PS (dst)); |
| 522 | if (extension_word) |
| 523 | { |
| 524 | dst |= extended_src << 16; |
| 525 | if (dst & 0x80000) |
| 526 | dst |= -1 << 20; |
| 527 | sprintf (op1, "#%d", dst); |
| 528 | if (dst > 9 || dst < 0) |
| 529 | sprintf (comm1, "0x%05x", dst & 0xfffff); |
| 530 | } |
| 531 | } |
| 532 | else |
| 533 | * cycles = print_as3_reg_name (regs, op1, comm1, 1, 1, 2); |
| 534 | } |
| 535 | else if (as == 1) |
| 536 | { |
| 537 | if (regs == 0) |
| 538 | { |
| 539 | *cycles = 4; |
| 540 | /* PC relative. */ |
| 541 | dst = msp430dis_opcode (addr + 2, info); |
| 542 | cmd_len += 2; |
| 543 | sprintf (op1, "0x%04x", PS (dst)); |
| 544 | sprintf (comm1, "PC rel. 0x%04x", |
| 545 | PS ((short) addr + 2 + dst)); |
| 546 | if (extension_word) |
| 547 | { |
| 548 | dst |= extended_src << 16; |
| 549 | if (dst & 0x80000) |
| 550 | dst |= -1 << 20; |
| 551 | sprintf (op1, "0x%05x", dst & 0xfffff); |
| 552 | sprintf (comm1, "PC rel. 0x%05lx", |
| 553 | (long) ((addr + 2 + dst) & 0xfffff)); |
| 554 | } |
| 555 | } |
| 556 | else if (regs == 2) |
| 557 | { |
| 558 | *cycles = 2; |
| 559 | /* Absolute. */ |
| 560 | dst = msp430dis_opcode (addr + 2, info); |
| 561 | cmd_len += 2; |
| 562 | sprintf (op1, "&0x%04x", PS (dst)); |
| 563 | sprintf (comm1, "0x%04x", PS (dst)); |
| 564 | if (extension_word) |
| 565 | { |
| 566 | dst |= extended_src << 16; |
| 567 | sprintf (op1, "&0x%05x", dst & 0xfffff); |
| 568 | * comm1 = 0; |
| 569 | } |
| 570 | } |
| 571 | else if (regs == 3) |
| 572 | { |
| 573 | *cycles = 1; |
| 574 | sprintf (op1, "#1"); |
| 575 | sprintf (comm1, "r3 As==01"); |
| 576 | } |
| 577 | else |
| 578 | { |
| 579 | *cycles = 3; |
| 580 | /* Indexed. */ |
| 581 | dst = msp430dis_opcode (addr + 2, info); |
| 582 | cmd_len += 2; |
| 583 | if (extension_word) |
| 584 | { |
| 585 | dst |= extended_src << 16; |
| 586 | if (dst & 0x80000) |
| 587 | dst |= -1 << 20; |
| 588 | } |
| 589 | else if (dst & 0x8000) |
| 590 | dst |= -1 << 16; |
| 591 | sprintf (op1, "%d(r%d)", dst, regs); |
| 592 | if (dst > 9 || dst < -9) |
| 593 | sprintf (comm1, "0x%05x", dst); |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | /* Destination. Special care needed on addr + XXXX. */ |
| 598 | |
| 599 | if (ad == 0) |
| 600 | { |
| 601 | /* Register. */ |
| 602 | if (regd == 0) |
| 603 | { |
| 604 | *cycles += 1; |
| 605 | sprintf (op2, "r0"); |
| 606 | } |
| 607 | else if (regd == 1) |
| 608 | sprintf (op2, "r1"); |
| 609 | |
| 610 | else if (regd == 2) |
| 611 | sprintf (op2, "r2"); |
| 612 | |
| 613 | else |
| 614 | sprintf (op2, "r%d", regd); |
| 615 | } |
| 616 | else /* ad == 1. */ |
| 617 | { |
| 618 | * cycles += 3; |
| 619 | |
| 620 | if (regd == 0) |
| 621 | { |
| 622 | /* PC relative. */ |
| 623 | *cycles += 1; |
| 624 | dst = msp430dis_opcode (addr + cmd_len, info); |
| 625 | sprintf (op2, "0x%04x", PS (dst)); |
| 626 | sprintf (comm2, "PC rel. 0x%04x", |
| 627 | PS ((short) addr + cmd_len + dst)); |
| 628 | if (extension_word) |
| 629 | { |
| 630 | dst |= extended_dst << 16; |
| 631 | if (dst & 0x80000) |
| 632 | dst |= -1 << 20; |
| 633 | sprintf (op2, "0x%05x", dst & 0xfffff); |
| 634 | sprintf (comm2, "PC rel. 0x%05lx", |
| 635 | (long)((addr + cmd_len + dst) & 0xfffff)); |
| 636 | } |
| 637 | cmd_len += 2; |
| 638 | } |
| 639 | else if (regd == 2) |
| 640 | { |
| 641 | /* Absolute. */ |
| 642 | dst = msp430dis_opcode (addr + cmd_len, info); |
| 643 | cmd_len += 2; |
| 644 | sprintf (op2, "&0x%04x", PS (dst)); |
| 645 | if (extension_word) |
| 646 | { |
| 647 | dst |= extended_dst << 16; |
| 648 | sprintf (op2, "&0x%05x", dst & 0xfffff); |
| 649 | } |
| 650 | } |
| 651 | else |
| 652 | { |
| 653 | dst = msp430dis_opcode (addr + cmd_len, info); |
| 654 | cmd_len += 2; |
| 655 | if (dst & 0x8000) |
| 656 | dst |= -1 << 16; |
| 657 | if (dst > 9 || dst < 0) |
| 658 | sprintf (comm2, "0x%04x", PS (dst)); |
| 659 | if (extension_word) |
| 660 | { |
| 661 | dst |= extended_dst << 16; |
| 662 | if (dst & 0x80000) |
| 663 | dst |= -1 << 20; |
| 664 | if (dst > 9 || dst < 0) |
| 665 | sprintf (comm2, "0x%05x", dst & 0xfffff); |
| 666 | } |
| 667 | sprintf (op2, "%d(r%d)", dst, regd); |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | return cmd_len; |
| 672 | } |
| 673 | |
| 674 | static int |
| 675 | msp430_branchinstr (disassemble_info *info, |
| 676 | struct msp430_opcode_s *opcode ATTRIBUTE_UNUSED, |
| 677 | bfd_vma addr ATTRIBUTE_UNUSED, |
| 678 | unsigned short insn, |
| 679 | char *op1, |
| 680 | char *comm1, |
| 681 | int *cycles) |
| 682 | { |
| 683 | int regs = 0, regd = 0; |
| 684 | int as = 0; |
| 685 | int cmd_len = 2; |
| 686 | short dst = 0; |
| 687 | |
| 688 | regd = insn & 0x0f; |
| 689 | regs = (insn & 0x0f00) >> 8; |
| 690 | as = (insn & 0x0030) >> 4; |
| 691 | |
| 692 | if (regd != 0) /* Destination register is not a PC. */ |
| 693 | return 0; |
| 694 | |
| 695 | /* dst is a source register. */ |
| 696 | if (as == 0) |
| 697 | { |
| 698 | /* Constants. */ |
| 699 | if (regs == 3) |
| 700 | { |
| 701 | *cycles = 1; |
| 702 | sprintf (op1, "#0"); |
| 703 | sprintf (comm1, "r3 As==00"); |
| 704 | } |
| 705 | else |
| 706 | { |
| 707 | /* Register. */ |
| 708 | *cycles = 1; |
| 709 | sprintf (op1, "r%d", regs); |
| 710 | } |
| 711 | } |
| 712 | else if (as == 2) |
| 713 | { |
| 714 | * cycles = print_as2_reg_name (regs, op1, comm1, 2, 1, 2); |
| 715 | } |
| 716 | else if (as == 3) |
| 717 | { |
| 718 | if (regs == 0) |
| 719 | { |
| 720 | /* Absolute. @pc+ */ |
| 721 | *cycles = 3; |
| 722 | dst = msp430dis_opcode (addr + 2, info); |
| 723 | cmd_len += 2; |
| 724 | sprintf (op1, "#0x%04x", PS (dst)); |
| 725 | } |
| 726 | else |
| 727 | * cycles = print_as3_reg_name (regs, op1, comm1, 1, 1, 2); |
| 728 | } |
| 729 | else if (as == 1) |
| 730 | { |
| 731 | * cycles = 3; |
| 732 | |
| 733 | if (regs == 0) |
| 734 | { |
| 735 | /* PC relative. */ |
| 736 | dst = msp430dis_opcode (addr + 2, info); |
| 737 | cmd_len += 2; |
| 738 | (*cycles)++; |
| 739 | sprintf (op1, "0x%04x", PS (dst)); |
| 740 | sprintf (comm1, "PC rel. 0x%04x", |
| 741 | PS ((short) addr + 2 + dst)); |
| 742 | } |
| 743 | else if (regs == 2) |
| 744 | { |
| 745 | /* Absolute. */ |
| 746 | dst = msp430dis_opcode (addr + 2, info); |
| 747 | cmd_len += 2; |
| 748 | sprintf (op1, "&0x%04x", PS (dst)); |
| 749 | } |
| 750 | else if (regs == 3) |
| 751 | { |
| 752 | (*cycles)--; |
| 753 | sprintf (op1, "#1"); |
| 754 | sprintf (comm1, "r3 As==01"); |
| 755 | } |
| 756 | else |
| 757 | { |
| 758 | /* Indexed. */ |
| 759 | dst = msp430dis_opcode (addr + 2, info); |
| 760 | cmd_len += 2; |
| 761 | if (dst & 0x8000) |
| 762 | dst |= -1 << 16; |
| 763 | sprintf (op1, "%d(r%d)", dst, regs); |
| 764 | } |
| 765 | } |
| 766 | |
| 767 | return cmd_len; |
| 768 | } |
| 769 | |
| 770 | static int |
| 771 | msp430x_calla_instr (disassemble_info * info, |
| 772 | bfd_vma addr, |
| 773 | unsigned short insn, |
| 774 | char * op1, |
| 775 | char * comm1, |
| 776 | int * cycles) |
| 777 | { |
| 778 | unsigned int ureg = insn & 0xf; |
| 779 | int reg = insn & 0xf; |
| 780 | int am = (insn & 0xf0) >> 4; |
| 781 | int cmd_len = 2; |
| 782 | unsigned short udst = 0; |
| 783 | short dst = 0; |
| 784 | |
| 785 | switch (am) |
| 786 | { |
| 787 | case 4: /* CALLA Rdst */ |
| 788 | *cycles = 1; |
| 789 | sprintf (op1, "r%d", reg); |
| 790 | break; |
| 791 | |
| 792 | case 5: /* CALLA x(Rdst) */ |
| 793 | *cycles = 3; |
| 794 | dst = msp430dis_opcode (addr + 2, info); |
| 795 | cmd_len += 2; |
| 796 | sprintf (op1, "%d(r%d)", dst, reg); |
| 797 | if (reg == 0) |
| 798 | sprintf (comm1, "PC rel. 0x%05lx", (long) (addr + 2 + dst)); |
| 799 | else |
| 800 | sprintf (comm1, "0x%05x", dst); |
| 801 | break; |
| 802 | |
| 803 | case 6: /* CALLA @Rdst */ |
| 804 | *cycles = 2; |
| 805 | sprintf (op1, "@r%d", reg); |
| 806 | break; |
| 807 | |
| 808 | case 7: /* CALLA @Rdst+ */ |
| 809 | *cycles = 2; |
| 810 | sprintf (op1, "@r%d+", reg); |
| 811 | break; |
| 812 | |
| 813 | case 8: /* CALLA &abs20 */ |
| 814 | udst = msp430dis_opcode (addr + 2, info); |
| 815 | cmd_len += 2; |
| 816 | *cycles = 4; |
| 817 | sprintf (op1, "&%d", (ureg << 16) + udst); |
| 818 | sprintf (comm1, "0x%05x", (ureg << 16) + udst); |
| 819 | break; |
| 820 | |
| 821 | case 9: /* CALLA pcrel-sym */ |
| 822 | dst = msp430dis_opcode (addr + 2, info); |
| 823 | cmd_len += 2; |
| 824 | *cycles = 4; |
| 825 | sprintf (op1, "%d(PC)", (reg << 16) + dst); |
| 826 | sprintf (comm1, "PC rel. 0x%05lx", |
| 827 | (long) (addr + 2 + dst + (reg << 16))); |
| 828 | break; |
| 829 | |
| 830 | case 11: /* CALLA #imm20 */ |
| 831 | udst = msp430dis_opcode (addr + 2, info); |
| 832 | cmd_len += 2; |
| 833 | *cycles = 4; |
| 834 | sprintf (op1, "#%d", (ureg << 16) + udst); |
| 835 | sprintf (comm1, "0x%05x", (ureg << 16) + udst); |
| 836 | break; |
| 837 | |
| 838 | default: |
| 839 | strcpy (comm1, _("unrecognised CALLA addressing mode")); |
| 840 | return -1; |
| 841 | } |
| 842 | |
| 843 | return cmd_len; |
| 844 | } |
| 845 | |
| 846 | int |
| 847 | print_insn_msp430 (bfd_vma addr, disassemble_info *info) |
| 848 | { |
| 849 | void *stream = info->stream; |
| 850 | fprintf_ftype prin = info->fprintf_func; |
| 851 | struct msp430_opcode_s *opcode; |
| 852 | char op1[32], op2[32], comm1[64], comm2[64]; |
| 853 | int cmd_len = 0; |
| 854 | unsigned short insn; |
| 855 | int cycles = 0; |
| 856 | char *bc = ""; |
| 857 | unsigned short extension_word = 0; |
| 858 | |
| 859 | insn = msp430dis_opcode (addr, info); |
| 860 | if (insn == (unsigned short) -1) |
| 861 | { |
| 862 | prin (stream, ".word 0xffff; ????"); |
| 863 | return 2; |
| 864 | } |
| 865 | |
| 866 | if (((int) addr & 0xffff) > 0xffdf) |
| 867 | { |
| 868 | (*prin) (stream, "interrupt service routine at 0x%04x", 0xffff & insn); |
| 869 | return 2; |
| 870 | } |
| 871 | |
| 872 | *comm1 = 0; |
| 873 | *comm2 = 0; |
| 874 | |
| 875 | /* Check for an extension word. */ |
| 876 | if ((insn & 0xf800) == 0x1800) |
| 877 | { |
| 878 | extension_word = insn; |
| 879 | addr += 2; |
| 880 | insn = msp430dis_opcode (addr, info); |
| 881 | if (insn == (unsigned short) -1) |
| 882 | { |
| 883 | prin (stream, ".word 0x%04x, 0xffff; ????", |
| 884 | extension_word); |
| 885 | return 4; |
| 886 | } |
| 887 | } |
| 888 | |
| 889 | for (opcode = msp430_opcodes; opcode->name; opcode++) |
| 890 | { |
| 891 | if ((insn & opcode->bin_mask) == opcode->bin_opcode |
| 892 | && opcode->bin_opcode != 0x9300) |
| 893 | { |
| 894 | *op1 = 0; |
| 895 | *op2 = 0; |
| 896 | *comm1 = 0; |
| 897 | *comm2 = 0; |
| 898 | |
| 899 | /* r0 as destination. Ad should be zero. */ |
| 900 | if (opcode->insn_opnumb == 3 |
| 901 | && (insn & 0x000f) == 0 |
| 902 | && (insn & 0x0080) == 0) |
| 903 | { |
| 904 | cmd_len += |
| 905 | msp430_branchinstr (info, opcode, addr, insn, op1, comm1, |
| 906 | &cycles); |
| 907 | if (cmd_len) |
| 908 | break; |
| 909 | } |
| 910 | |
| 911 | switch (opcode->insn_opnumb) |
| 912 | { |
| 913 | int n; |
| 914 | int reg; |
| 915 | |
| 916 | case 4: |
| 917 | cmd_len += msp430x_calla_instr (info, addr, insn, |
| 918 | op1, comm1, & cycles); |
| 919 | break; |
| 920 | |
| 921 | case 5: /* PUSHM/POPM */ |
| 922 | n = (insn & 0xf0) >> 4; |
| 923 | reg = (insn & 0xf); |
| 924 | |
| 925 | sprintf (op1, "#%d", n + 1); |
| 926 | if (opcode->bin_opcode == 0x1400) |
| 927 | /* PUSHM */ |
| 928 | sprintf (op2, "r%d", reg); |
| 929 | else |
| 930 | /* POPM */ |
| 931 | sprintf (op2, "r%d", reg + n); |
| 932 | if (insn & 0x100) |
| 933 | sprintf (comm1, "16-bit words"); |
| 934 | else |
| 935 | { |
| 936 | sprintf (comm1, "20-bit words"); |
| 937 | bc =".a"; |
| 938 | } |
| 939 | |
| 940 | cycles = 2; /*FIXME*/ |
| 941 | cmd_len = 2; |
| 942 | break; |
| 943 | |
| 944 | case 6: /* RRAM, RRCM, RRUM, RLAM. */ |
| 945 | n = ((insn >> 10) & 0x3) + 1; |
| 946 | reg = (insn & 0xf); |
| 947 | if ((insn & 0x10) == 0) |
| 948 | bc =".a"; |
| 949 | sprintf (op1, "#%d", n); |
| 950 | sprintf (op2, "r%d", reg); |
| 951 | cycles = 2; /*FIXME*/ |
| 952 | cmd_len = 2; |
| 953 | break; |
| 954 | |
| 955 | case 8: /* ADDA, CMPA, SUBA. */ |
| 956 | reg = (insn & 0xf); |
| 957 | n = (insn >> 8) & 0xf; |
| 958 | if (insn & 0x40) |
| 959 | { |
| 960 | sprintf (op1, "r%d", n); |
| 961 | cmd_len = 2; |
| 962 | } |
| 963 | else |
| 964 | { |
| 965 | n <<= 16; |
| 966 | n |= msp430dis_opcode (addr + 2, info); |
| 967 | sprintf (op1, "#%d", n); |
| 968 | if (n > 9 || n < 0) |
| 969 | sprintf (comm1, "0x%05x", n); |
| 970 | cmd_len = 4; |
| 971 | } |
| 972 | sprintf (op2, "r%d", reg); |
| 973 | cycles = 2; /*FIXME*/ |
| 974 | break; |
| 975 | |
| 976 | case 9: /* MOVA */ |
| 977 | reg = (insn & 0xf); |
| 978 | n = (insn >> 8) & 0xf; |
| 979 | switch ((insn >> 4) & 0xf) |
| 980 | { |
| 981 | case 0: /* MOVA @Rsrc, Rdst */ |
| 982 | cmd_len = 2; |
| 983 | sprintf (op1, "@r%d", n); |
| 984 | if (strcmp (opcode->name, "bra") != 0) |
| 985 | sprintf (op2, "r%d", reg); |
| 986 | break; |
| 987 | |
| 988 | case 1: /* MOVA @Rsrc+, Rdst */ |
| 989 | cmd_len = 2; |
| 990 | if (strcmp (opcode->name, "reta") != 0) |
| 991 | { |
| 992 | sprintf (op1, "@r%d+", n); |
| 993 | if (strcmp (opcode->name, "bra") != 0) |
| 994 | sprintf (op2, "r%d", reg); |
| 995 | } |
| 996 | break; |
| 997 | |
| 998 | case 2: /* MOVA &abs20, Rdst */ |
| 999 | cmd_len = 4; |
| 1000 | n <<= 16; |
| 1001 | n |= msp430dis_opcode (addr + 2, info); |
| 1002 | sprintf (op1, "&%d", n); |
| 1003 | if (n > 9 || n < 0) |
| 1004 | sprintf (comm1, "0x%05x", n); |
| 1005 | if (strcmp (opcode->name, "bra") != 0) |
| 1006 | sprintf (op2, "r%d", reg); |
| 1007 | break; |
| 1008 | |
| 1009 | case 3: /* MOVA x(Rsrc), Rdst */ |
| 1010 | cmd_len = 4; |
| 1011 | if (strcmp (opcode->name, "bra") != 0) |
| 1012 | sprintf (op2, "r%d", reg); |
| 1013 | reg = n; |
| 1014 | n = msp430dis_opcode (addr + 2, info); |
| 1015 | if (n & 0x8000) |
| 1016 | n |= -1 << 16; |
| 1017 | sprintf (op1, "%d(r%d)", n, reg); |
| 1018 | if (n > 9 || n < 0) |
| 1019 | { |
| 1020 | if (reg == 0) |
| 1021 | sprintf (comm1, "PC rel. 0x%05lx", |
| 1022 | (long) (addr + 2 + n)); |
| 1023 | else |
| 1024 | sprintf (comm1, "0x%05x", n); |
| 1025 | } |
| 1026 | break; |
| 1027 | |
| 1028 | case 6: /* MOVA Rsrc, &abs20 */ |
| 1029 | cmd_len = 4; |
| 1030 | reg <<= 16; |
| 1031 | reg |= msp430dis_opcode (addr + 2, info); |
| 1032 | sprintf (op1, "r%d", n); |
| 1033 | sprintf (op2, "&%d", reg); |
| 1034 | if (reg > 9 || reg < 0) |
| 1035 | sprintf (comm2, "0x%05x", reg); |
| 1036 | break; |
| 1037 | |
| 1038 | case 7: /* MOVA Rsrc, x(Rdst) */ |
| 1039 | cmd_len = 4; |
| 1040 | sprintf (op1, "r%d", n); |
| 1041 | n = msp430dis_opcode (addr + 2, info); |
| 1042 | if (n & 0x8000) |
| 1043 | n |= -1 << 16; |
| 1044 | sprintf (op2, "%d(r%d)", n, reg); |
| 1045 | if (n > 9 || n < 0) |
| 1046 | { |
| 1047 | if (reg == 0) |
| 1048 | sprintf (comm2, "PC rel. 0x%05lx", |
| 1049 | (long) (addr + 2 + n)); |
| 1050 | else |
| 1051 | sprintf (comm2, "0x%05x", n); |
| 1052 | } |
| 1053 | break; |
| 1054 | |
| 1055 | case 8: /* MOVA #imm20, Rdst */ |
| 1056 | cmd_len = 4; |
| 1057 | n <<= 16; |
| 1058 | n |= msp430dis_opcode (addr + 2, info); |
| 1059 | if (n & 0x80000) |
| 1060 | n |= -1 << 20; |
| 1061 | sprintf (op1, "#%d", n); |
| 1062 | if (n > 9 || n < 0) |
| 1063 | sprintf (comm1, "0x%05x", n); |
| 1064 | if (strcmp (opcode->name, "bra") != 0) |
| 1065 | sprintf (op2, "r%d", reg); |
| 1066 | break; |
| 1067 | |
| 1068 | case 12: /* MOVA Rsrc, Rdst */ |
| 1069 | cmd_len = 2; |
| 1070 | sprintf (op1, "r%d", n); |
| 1071 | if (strcmp (opcode->name, "bra") != 0) |
| 1072 | sprintf (op2, "r%d", reg); |
| 1073 | break; |
| 1074 | |
| 1075 | default: |
| 1076 | break; |
| 1077 | } |
| 1078 | cycles = 2; /* FIXME */ |
| 1079 | break; |
| 1080 | } |
| 1081 | |
| 1082 | if (cmd_len) |
| 1083 | break; |
| 1084 | |
| 1085 | switch (opcode->insn_opnumb) |
| 1086 | { |
| 1087 | case 0: |
| 1088 | cmd_len += msp430_nooperands (opcode, addr, insn, comm1, &cycles); |
| 1089 | break; |
| 1090 | case 2: |
| 1091 | cmd_len += |
| 1092 | msp430_doubleoperand (info, opcode, addr, insn, op1, op2, |
| 1093 | comm1, comm2, |
| 1094 | extension_word, |
| 1095 | &cycles); |
| 1096 | if (insn & BYTE_OPERATION) |
| 1097 | { |
| 1098 | if (extension_word != 0 && ((extension_word & BYTE_OPERATION) == 0)) |
| 1099 | bc = ".a"; |
| 1100 | else |
| 1101 | bc = ".b"; |
| 1102 | } |
| 1103 | else if (extension_word) |
| 1104 | { |
| 1105 | if (extension_word & (1 << 6)) |
| 1106 | bc = ".w"; |
| 1107 | else |
| 1108 | { |
| 1109 | bc = ".?"; |
| 1110 | sprintf (comm2, _("Reserved use of A/L and B/W bits detected")); |
| 1111 | } |
| 1112 | } |
| 1113 | |
| 1114 | break; |
| 1115 | case 1: |
| 1116 | cmd_len += |
| 1117 | msp430_singleoperand (info, opcode, addr, insn, op1, comm1, |
| 1118 | extension_word, |
| 1119 | &cycles); |
| 1120 | if (extension_word |
| 1121 | && (strcmp (opcode->name, "swpb") == 0 |
| 1122 | || strcmp (opcode->name, "sxt") == 0)) |
| 1123 | { |
| 1124 | if (insn & BYTE_OPERATION) |
| 1125 | { |
| 1126 | bc = ".?"; |
| 1127 | sprintf (comm2, _("Reserved use of A/L and B/W bits detected")); |
| 1128 | } |
| 1129 | else if (extension_word & BYTE_OPERATION) |
| 1130 | bc = ".w"; |
| 1131 | else |
| 1132 | bc = ".a"; |
| 1133 | } |
| 1134 | else if (insn & BYTE_OPERATION && opcode->fmt != 3) |
| 1135 | { |
| 1136 | if (extension_word != 0 && ((extension_word & BYTE_OPERATION) == 0)) |
| 1137 | bc = ".a"; |
| 1138 | else |
| 1139 | bc = ".b"; |
| 1140 | } |
| 1141 | else if (extension_word) |
| 1142 | { |
| 1143 | if (extension_word & (1 << 6)) |
| 1144 | bc = ".w"; |
| 1145 | else |
| 1146 | { |
| 1147 | bc = ".?"; |
| 1148 | sprintf (comm2, _("Reserved use of A/L and B/W bits detected")); |
| 1149 | } |
| 1150 | } |
| 1151 | break; |
| 1152 | default: |
| 1153 | break; |
| 1154 | } |
| 1155 | } |
| 1156 | |
| 1157 | if (cmd_len) |
| 1158 | break; |
| 1159 | } |
| 1160 | |
| 1161 | if (cmd_len < 1) |
| 1162 | { |
| 1163 | /* Unknown opcode, or invalid combination of operands. */ |
| 1164 | if (extension_word) |
| 1165 | { |
| 1166 | prin (stream, ".word 0x%04x, 0x%04x; ????", extension_word, PS (insn)); |
| 1167 | if (*comm1) |
| 1168 | prin (stream, "\t %s", comm1); |
| 1169 | return 4; |
| 1170 | } |
| 1171 | (*prin) (stream, ".word 0x%04x; ????", PS (insn)); |
| 1172 | return 2; |
| 1173 | } |
| 1174 | |
| 1175 | /* Display the repeat count (if set) for extended register mode. */ |
| 1176 | if (cmd_len == 2 && ((extension_word & 0xf) != 0)) |
| 1177 | { |
| 1178 | if (extension_word & (1 << 7)) |
| 1179 | prin (stream, "rpt r%d { ", extension_word & 0xf); |
| 1180 | else |
| 1181 | prin (stream, "rpt #%d { ", (extension_word & 0xf) + 1); |
| 1182 | } |
| 1183 | |
| 1184 | if (extension_word && opcode->name[strlen (opcode->name) - 1] != 'x') |
| 1185 | (*prin) (stream, "%sx%s", opcode->name, bc); |
| 1186 | else |
| 1187 | (*prin) (stream, "%s%s", opcode->name, bc); |
| 1188 | |
| 1189 | if (*op1) |
| 1190 | (*prin) (stream, "\t%s", op1); |
| 1191 | if (*op2) |
| 1192 | (*prin) (stream, ","); |
| 1193 | |
| 1194 | if (strlen (op1) < 7) |
| 1195 | (*prin) (stream, "\t"); |
| 1196 | if (!strlen (op1)) |
| 1197 | (*prin) (stream, "\t"); |
| 1198 | |
| 1199 | if (*op2) |
| 1200 | (*prin) (stream, "%s", op2); |
| 1201 | if (strlen (op2) < 8) |
| 1202 | (*prin) (stream, "\t"); |
| 1203 | |
| 1204 | if (*comm1 || *comm2) |
| 1205 | (*prin) (stream, ";"); |
| 1206 | else if (cycles) |
| 1207 | { |
| 1208 | if (*op2) |
| 1209 | (*prin) (stream, ";"); |
| 1210 | else |
| 1211 | { |
| 1212 | if (strlen (op1) < 7) |
| 1213 | (*prin) (stream, ";"); |
| 1214 | else |
| 1215 | (*prin) (stream, "\t;"); |
| 1216 | } |
| 1217 | } |
| 1218 | if (*comm1) |
| 1219 | (*prin) (stream, "%s", comm1); |
| 1220 | if (*comm1 && *comm2) |
| 1221 | (*prin) (stream, ","); |
| 1222 | if (*comm2) |
| 1223 | (*prin) (stream, " %s", comm2); |
| 1224 | |
| 1225 | if (extension_word) |
| 1226 | cmd_len += 2; |
| 1227 | |
| 1228 | return cmd_len; |
| 1229 | } |