opcodes/msp430-dis.c

   1 /* Disassemble MSP430 instructions.
   2    Copyright (C) 2002, 2004 Free Software Foundation, Inc.
   3
   4    Contributed by Dmitry Diky <diwil@mail.ru>
   5
   6    This program 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 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program 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 this program; if not, write to the Free Software
  18    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  19
  20 #include <stdio.h>
  21 #include <ctype.h>
  22 #include <string.h>
  23 #include <sys/types.h>
  24
  25 #include "dis-asm.h"
  26 #include "opintl.h"
  27 #include "libiberty.h"
  28
  29 #define DASM_SECTION
  30 #include "opcode/msp430.h"
  31 #undef DASM_SECTION
  32
  33
  34 static unsigned short msp430dis_opcode
  35   PARAMS ((bfd_vma, disassemble_info *));
  36 int print_insn_msp430
  37   PARAMS ((bfd_vma, disassemble_info *));
  38 int msp430_nooperands
  39   PARAMS ((struct msp430_opcode_s *, bfd_vma, unsigned short, char *, int *));
  40 int msp430_singleoperand
  41   PARAMS ((disassemble_info *, struct msp430_opcode_s *, bfd_vma, unsigned short,
  42            char *, char *, int *));
  43 int msp430_doubleoperand
  44   PARAMS ((disassemble_info *, struct msp430_opcode_s *, bfd_vma, unsigned short,
  45            char *, char *, char *, char *, int *));
  46 int msp430_branchinstr
  47   PARAMS ((disassemble_info *, struct msp430_opcode_s *, bfd_vma, unsigned short,
  48            char *, char *, int *));
  49
  50 #define PS(x)   (0xffff & (x))
  51
  52 static unsigned short
  53 msp430dis_opcode (addr, info)
  54      bfd_vma addr;
  55      disassemble_info *info;
  56 {
  57   bfd_byte buffer[2];
  58   int status;
  59
  60   status = info->read_memory_func (addr, buffer, 2, info);
  61   if (status != 0)
  62     {
  63       info->memory_error_func (status, addr, info);
  64       return -1;
  65     }
  66   return bfd_getl16 (buffer);
  67 }
  68
  69 int
  70 print_insn_msp430 (addr, info)
  71      bfd_vma addr;
  72      disassemble_info *info;
  73 {
  74   void *stream = info->stream;
  75   fprintf_ftype prin = info->fprintf_func;
  76   struct msp430_opcode_s *opcode;
  77   char op1[32], op2[32], comm1[64], comm2[64];
  78   int cmd_len = 0;
  79   unsigned short insn;
  80   int cycles = 0;
  81   char *bc = "";
  82   char dinfo[32];               /* Debug purposes.  */
  83
  84   insn = msp430dis_opcode (addr, info);
  85   sprintf (dinfo, "0x%04x", insn);
  86
  87   if (((int) addr & 0xffff) > 0xffdf)
  88     {
  89       (*prin) (stream, "interrupt service routine at 0x%04x", 0xffff & insn);
  90       return 2;
  91     }
  92
  93   *comm1 = 0;
  94   *comm2 = 0;
  95
  96   for (opcode = msp430_opcodes; opcode->name; opcode++)
  97     {
  98       if ((insn & opcode->bin_mask) == opcode->bin_opcode
  99           && opcode->bin_opcode != 0x9300)
 100         {
 101           *op1 = 0;
 102           *op2 = 0;
 103           *comm1 = 0;
 104           *comm2 = 0;
 105
 106           /* r0 as destination. Ad should be zero.  */
 107           if (opcode->insn_opnumb == 3 && (insn & 0x000f) == 0
 108               && (0x0080 & insn) == 0)
 109             {
 110               cmd_len =
 111                 msp430_branchinstr (info, opcode, addr, insn, op1, comm1,
 112                                     &cycles);
 113               if (cmd_len)
 114                 break;
 115             }
 116
 117           switch (opcode->insn_opnumb)
 118             {
 119             case 0:
 120               cmd_len = msp430_nooperands (opcode, addr, insn, comm1, &cycles);
 121               break;
 122             case 2:
 123               cmd_len =
 124                 msp430_doubleoperand (info, opcode, addr, insn, op1, op2,
 125                                       comm1, comm2, &cycles);
 126               if (insn & BYTE_OPERATION)
 127                 bc = ".b";
 128               break;
 129             case 1:
 130               cmd_len =
 131                 msp430_singleoperand (info, opcode, addr, insn, op1, comm1,
 132                                       &cycles);
 133               if (insn & BYTE_OPERATION && opcode->fmt != 3)
 134                 bc = ".b";
 135               break;
 136             default:
 137               break;
 138             }
 139         }
 140
 141       if (cmd_len)
 142         break;
 143     }
 144
 145   dinfo[5] = 0;
 146
 147   if (cmd_len < 1)
 148     {
 149       /* Unknown opcode, or invalid combination of operands.  */
 150       (*prin) (stream, ".word   0x%04x; ????", PS (insn));
 151       return 2;
 152     }
 153
 154   (*prin) (stream, "%s%s", opcode->name, bc);
 155
 156   if (*op1)
 157     (*prin) (stream, "\t%s", op1);
 158   if (*op2)
 159     (*prin) (stream, ",");
 160
 161   if (strlen (op1) < 7)
 162     (*prin) (stream, "\t");
 163   if (!strlen (op1))
 164     (*prin) (stream, "\t");
 165
 166   if (*op2)
 167     (*prin) (stream, "%s", op2);
 168   if (strlen (op2) < 8)
 169     (*prin) (stream, "\t");
 170
 171   if (*comm1 || *comm2)
 172     (*prin) (stream, ";");
 173   else if (cycles)
 174     {
 175       if (*op2)
 176         (*prin) (stream, ";");
 177       else
 178         {
 179           if (strlen (op1) < 7)
 180             (*prin) (stream, ";");
 181           else
 182             (*prin) (stream, "\t;");
 183         }
 184     }
 185   if (*comm1)
 186     (*prin) (stream, "%s", comm1);
 187   if (*comm1 && *comm2)
 188     (*prin) (stream, ",");
 189   if (*comm2)
 190     (*prin) (stream, " %s", comm2);
 191   return cmd_len;
 192 }
 193
 194 int
 195 msp430_nooperands (opcode, addr, insn, comm, cycles)
 196      struct msp430_opcode_s *opcode;
 197      bfd_vma addr ATTRIBUTE_UNUSED;
 198      unsigned short insn ATTRIBUTE_UNUSED;
 199      char *comm;
 200      int *cycles;
 201 {
 202   /* Pop with constant.  */
 203   if (insn == 0x43b2)
 204     return 0;
 205   if (insn == opcode->bin_opcode)
 206     return 2;
 207
 208   if (opcode->fmt == 0)
 209     {
 210       if ((insn & 0x0f00) != 3 || (insn & 0x0f00) != 2)
 211         return 0;
 212
 213       strcpy (comm, "emulated...");
 214       *cycles = 1;
 215     }
 216   else
 217     {
 218       strcpy (comm, "return from interupt");
 219       *cycles = 5;
 220     }
 221
 222   return 2;
 223 }
 224
 225
 226 int
 227 msp430_singleoperand (info, opcode, addr, insn, op, comm, cycles)
 228      disassemble_info *info;
 229      struct msp430_opcode_s *opcode;
 230      bfd_vma addr;
 231      unsigned short insn;
 232      char *op;
 233      char *comm;
 234      int *cycles;
 235 {
 236   int regs = 0, regd = 0;
 237   int ad = 0, as = 0;
 238   int where = 0;
 239   int cmd_len = 2;
 240   short dst = 0;
 241
 242   regd = insn & 0x0f;
 243   regs = (insn & 0x0f00) >> 8;
 244   as = (insn & 0x0030) >> 4;
 245   ad = (insn & 0x0080) >> 7;
 246
 247   switch (opcode->fmt)
 248     {
 249     case 0:                     /* Emulated work with dst register.  */
 250       if (regs != 2 && regs != 3 && regs != 1)
 251         return 0;
 252
 253       /* Check if not clr insn.  */
 254       if (opcode->bin_opcode == 0x4300 && (ad || as))
 255         return 0;
 256
 257       /* Check if really inc, incd insns.  */
 258       if ((opcode->bin_opcode & 0xff00) == 0x5300 && as == 3)
 259         return 0;
 260
 261       if (ad == 0)
 262         {
 263           *cycles = 1;
 264
 265           /* Register.  */
 266           if (regd == 0)
 267             {
 268               *cycles += 1;
 269               sprintf (op, "r0");
 270             }
 271           else if (regd == 1)
 272             sprintf (op, "r1");
 273
 274           else if (regd == 2)
 275             sprintf (op, "r2");
 276
 277           else
 278             sprintf (op, "r%d", regd);
 279         }
 280       else                      /* ad == 1 msp430dis_opcode.  */
 281         {
 282           if (regd == 0)
 283             {
 284               /* PC relative.  */
 285               dst = msp430dis_opcode (addr + 2, info);
 286               cmd_len += 2;
 287               *cycles = 4;
 288               sprintf (op, "0x%04x", dst);
 289               sprintf (comm, "PC rel. abs addr 0x%04x",
 290                        PS ((short) (addr + 2) + dst));
 291             }
 292           else if (regd == 2)
 293             {
 294               /* Absolute.  */
 295               dst = msp430dis_opcode (addr + 2, info);
 296               cmd_len += 2;
 297               *cycles = 4;
 298               sprintf (op, "&0x%04x", PS (dst));
 299             }
 300           else
 301             {
 302               dst = msp430dis_opcode (addr + 2, info);
 303               cmd_len += 2;
 304               *cycles = 4;
 305               sprintf (op, "%d(r%d)", dst, regd);
 306             }
 307         }
 308       break;
 309
 310     case 2:     /* rrc, push, call, swpb, rra, sxt, push, call, reti etc...  */
 311
 312       if (as == 0)
 313         {
 314           if (regd == 3)
 315             {
 316               /* Constsnts.  */
 317               sprintf (op, "#0");
 318               sprintf (comm, "r3 As==00");
 319             }
 320           else
 321             {
 322               /* Register.  */
 323               sprintf (op, "r%d", regd);
 324             }
 325           *cycles = 1;
 326         }
 327       else if (as == 2)
 328         {
 329           *cycles = 1;
 330           if (regd == 2)
 331             {
 332               sprintf (op, "#4");
 333               sprintf (comm, "r2 As==10");
 334             }
 335           else if (regd == 3)
 336             {
 337               sprintf (op, "#2");
 338               sprintf (comm, "r3 As==10");
 339             }
 340           else
 341             {
 342               *cycles = 3;
 343               /* Indexed register mode @Rn.  */
 344               sprintf (op, "@r%d", regd);
 345             }
 346         }
 347       else if (as == 3)
 348         {
 349           *cycles = 1;
 350           if (regd == 2)
 351             {
 352               sprintf (op, "#8");
 353               sprintf (comm, "r2 As==11");
 354             }
 355           else if (regd == 3)
 356             {
 357               sprintf (op, "#-1");
 358               sprintf (comm, "r3 As==11");
 359             }
 360           else if (regd == 0)
 361             {
 362               *cycles = 3;
 363               /* absolute. @pc+ */
 364               dst = msp430dis_opcode (addr + 2, info);
 365               cmd_len += 2;
 366               sprintf (op, "#%d", dst);
 367               sprintf (comm, "#0x%04x", PS (dst));
 368             }
 369           else
 370             {
 371               *cycles = 3;
 372               sprintf (op, "@r%d+", regd);
 373             }
 374         }
 375       else if (as == 1)
 376         {
 377           *cycles = 4;
 378           if (regd == 0)
 379             {
 380               /* PC relative.  */
 381               dst = msp430dis_opcode (addr + 2, info);
 382               cmd_len += 2;
 383               sprintf (op, "0x%04x", PS (dst));
 384               sprintf (comm, "PC rel. 0x%04x",
 385                        PS ((short) addr + 2 + dst));
 386             }
 387           else if (regd == 2)
 388             {
 389               /* Absolute.  */
 390               dst = msp430dis_opcode (addr + 2, info);
 391               cmd_len += 2;
 392               sprintf (op, "&0x%04x", PS (dst));
 393             }
 394           else if (regd == 3)
 395             {
 396               *cycles = 1;
 397               sprintf (op, "#1");
 398               sprintf (comm, "r3 As==01");
 399             }
 400           else
 401             {
 402               /* Indexd.  */
 403               dst = msp430dis_opcode (addr + 2, info);
 404               cmd_len += 2;
 405               sprintf (op, "%d(r%d)", dst, regd);
 406             }
 407         }
 408       break;
 409
 410     case 3:                     /* Jumps.  */
 411       where = insn & 0x03ff;
 412       if (where & 0x200)
 413         where |= ~0x03ff;
 414       if (where > 512 || where < -511)
 415         return 0;
 416
 417       where *= 2;
 418       sprintf (op, "$%+-8d", where + 2);
 419       sprintf (comm, "abs 0x%x", PS ((short) (addr) + 2 + where));
 420       *cycles = 2;
 421       return 2;
 422       break;
 423     default:
 424       cmd_len = 0;
 425     }
 426
 427   return cmd_len;
 428 }
 429
 430 int
 431 msp430_doubleoperand (info, opcode, addr, insn, op1, op2, comm1, comm2, cycles)
 432      disassemble_info *info;
 433      struct msp430_opcode_s *opcode;
 434      bfd_vma addr;
 435      unsigned short insn;
 436      char *op1, *op2;
 437      char *comm1, *comm2;
 438      int *cycles;
 439 {
 440   int regs = 0, regd = 0;
 441   int ad = 0, as = 0;
 442   int cmd_len = 2;
 443   short dst = 0;
 444
 445   regd = insn & 0x0f;
 446   regs = (insn & 0x0f00) >> 8;
 447   as = (insn & 0x0030) >> 4;
 448   ad = (insn & 0x0080) >> 7;
 449
 450   if (opcode->fmt == 0)
 451     {
 452       /* Special case: rla and rlc are the only 2 emulated instructions that
 453          fall into two operand instructions.  */
 454       /* With dst, there are only:
 455          Rm             Register,
 456          x(Rm)          Indexed,
 457          0xXXXX         Relative,
 458          &0xXXXX        Absolute
 459          emulated_ins   dst
 460          basic_ins      dst, dst.  */
 461
 462       if (regd != regs || as != ad)
 463         return 0;               /* May be 'data' section.  */
 464
 465       if (ad == 0)
 466         {
 467           /* Register mode.  */
 468           if (regd == 3)
 469             {
 470               strcpy (comm1, "Illegal as emulation instr");
 471               return -1;
 472             }
 473
 474           sprintf (op1, "r%d", regd);
 475           *cycles = 1;
 476         }
 477       else                      /* ad == 1 */
 478         {
 479           if (regd == 0)
 480             {
 481               /* PC relative, Symbolic.  */
 482               dst = msp430dis_opcode (addr + 2, info);
 483               cmd_len += 4;
 484               *cycles = 6;
 485               sprintf (op1, "0x%04x", PS (dst));
 486               sprintf (comm1, "PC rel. 0x%04x",
 487                        PS ((short) addr + 2 + dst));
 488
 489             }
 490           else if (regd == 2)
 491             {
 492               /* Absolute.  */
 493               dst = msp430dis_opcode (addr + 2, info);
 494               /* If the 'src' field is not the same as the dst
 495                  then this is not an rla instruction.  */
 496               if (dst != msp430dis_opcode (addr + 4, info))
 497                 return 0;
 498               cmd_len += 4;
 499               *cycles = 6;
 500               sprintf (op1, "&0x%04x", PS (dst));
 501             }
 502           else
 503             {
 504               /* Indexed.  */
 505               dst = msp430dis_opcode (addr + 2, info);
 506               cmd_len += 4;
 507               *cycles = 6;
 508               sprintf (op1, "%d(r%d)", dst, regd);
 509             }
 510         }
 511
 512       *op2 = 0;
 513       *comm2 = 0;
 514       return cmd_len;
 515     }
 516
 517   /* Two operands exactly.  */
 518   if (ad == 0 && regd == 3)
 519     {
 520       /* R2/R3 are illegal as dest: may be data section.  */
 521       strcpy (comm1, "Illegal as 2-op instr");
 522       return -1;
 523     }
 524
 525   /* Source.  */
 526   if (as == 0)
 527     {
 528       *cycles = 1;
 529       if (regs == 3)
 530         {
 531           /* Constsnts.  */
 532           sprintf (op1, "#0");
 533           sprintf (comm1, "r3 As==00");
 534         }
 535       else
 536         {
 537           /* Register.  */
 538           sprintf (op1, "r%d", regs);
 539         }
 540     }
 541   else if (as == 2)
 542     {
 543       *cycles = 1;
 544
 545       if (regs == 2)
 546         {
 547           sprintf (op1, "#4");
 548           sprintf (comm1, "r2 As==10");
 549         }
 550       else if (regs == 3)
 551         {
 552           sprintf (op1, "#2");
 553           sprintf (comm1, "r3 As==10");
 554         }
 555       else
 556         {
 557           *cycles = 2;
 558
 559           /* Indexed register mode @Rn.  */
 560           sprintf (op1, "@r%d", regs);
 561         }
 562       if (!regs)
 563         *cycles = 3;
 564     }
 565   else if (as == 3)
 566     {
 567       if (regs == 2)
 568         {
 569           sprintf (op1, "#8");
 570           sprintf (comm1, "r2 As==11");
 571           *cycles = 1;
 572         }
 573       else if (regs == 3)
 574         {
 575           sprintf (op1, "#-1");
 576           sprintf (comm1, "r3 As==11");
 577           *cycles = 1;
 578         }
 579       else if (regs == 0)
 580         {
 581           *cycles = 3;
 582           /* Absolute. @pc+  */
 583           dst = msp430dis_opcode (addr + 2, info);
 584           cmd_len += 2;
 585           sprintf (op1, "#%d", dst);
 586           sprintf (comm1, "#0x%04x", PS (dst));
 587         }
 588       else
 589         {
 590           *cycles = 2;
 591           sprintf (op1, "@r%d+", regs);
 592         }
 593     }
 594   else if (as == 1)
 595     {
 596       if (regs == 0)
 597         {
 598           *cycles = 4;
 599           /* PC relative.  */
 600           dst = msp430dis_opcode (addr + 2, info);
 601           cmd_len += 2;
 602           sprintf (op1, "0x%04x", PS (dst));
 603           sprintf (comm1, "PC rel. 0x%04x",
 604                    PS ((short) addr + 2 + dst));
 605         }
 606       else if (regs == 2)
 607         {
 608           *cycles = 2;
 609           /* Absolute.  */
 610           dst = msp430dis_opcode (addr + 2, info);
 611           cmd_len += 2;
 612           sprintf (op1, "&0x%04x", PS (dst));
 613           sprintf (comm1, "0x%04x", PS (dst));
 614         }
 615       else if (regs == 3)
 616         {
 617           *cycles = 1;
 618           sprintf (op1, "#1");
 619           sprintf (comm1, "r3 As==01");
 620         }
 621       else
 622         {
 623           *cycles = 3;
 624           /* Indexed.  */
 625           dst = msp430dis_opcode (addr + 2, info);
 626           cmd_len += 2;
 627           sprintf (op1, "%d(r%d)", dst, regs);
 628         }
 629     }
 630
 631   /* Destination. Special care needed on addr + XXXX.  */
 632
 633   if (ad == 0)
 634     {
 635       /* Register.  */
 636       if (regd == 0)
 637         {
 638           *cycles += 1;
 639           sprintf (op2, "r0");
 640         }
 641       else if (regd == 1)
 642         sprintf (op2, "r1");
 643
 644       else if (regd == 2)
 645         sprintf (op2, "r2");
 646
 647       else
 648         sprintf (op2, "r%d", regd);
 649     }
 650   else                          /* ad == 1.  */
 651     {
 652       * cycles += 3;
 653
 654       if (regd == 0)
 655         {
 656           /* PC relative.  */
 657           *cycles += 1;
 658           dst = msp430dis_opcode (addr + cmd_len, info);
 659           sprintf (op2, "0x%04x", PS (dst));
 660           sprintf (comm2, "PC rel. 0x%04x",
 661                    PS ((short) addr + cmd_len + dst));
 662           cmd_len += 2;
 663         }
 664       else if (regd == 2)
 665         {
 666           /* Absolute.  */
 667           dst = msp430dis_opcode (addr + cmd_len, info);
 668           cmd_len += 2;
 669           sprintf (op2, "&0x%04x", PS (dst));
 670         }
 671       else
 672         {
 673           dst = msp430dis_opcode (addr + cmd_len, info);
 674           cmd_len += 2;
 675           sprintf (op2, "%d(r%d)", dst, regd);
 676         }
 677     }
 678
 679   return cmd_len;
 680 }
 681
 682
 683 int
 684 msp430_branchinstr (info, opcode, addr, insn, op1, comm1, cycles)
 685      disassemble_info *info;
 686      struct msp430_opcode_s *opcode ATTRIBUTE_UNUSED;
 687      bfd_vma addr ATTRIBUTE_UNUSED;
 688      unsigned short insn;
 689      char *op1;
 690      char *comm1;
 691      int *cycles;
 692 {
 693   int regs = 0, regd = 0;
 694   int ad = 0, as = 0;
 695   int cmd_len = 2;
 696   short dst = 0;
 697
 698   regd = insn & 0x0f;
 699   regs = (insn & 0x0f00) >> 8;
 700   as = (insn & 0x0030) >> 4;
 701   ad = (insn & 0x0080) >> 7;
 702
 703   if (regd != 0)        /* Destination register is not a PC.  */
 704     return 0;
 705
 706   /* dst is a source register.  */
 707   if (as == 0)
 708     {
 709       /* Constants.  */
 710       if (regs == 3)
 711         {
 712           *cycles = 1;
 713           sprintf (op1, "#0");
 714           sprintf (comm1, "r3 As==00");
 715         }
 716       else
 717         {
 718           /* Register.  */
 719           *cycles = 1;
 720           sprintf (op1, "r%d", regs);
 721         }
 722     }
 723   else if (as == 2)
 724     {
 725       if (regs == 2)
 726         {
 727           *cycles = 2;
 728           sprintf (op1, "#4");
 729           sprintf (comm1, "r2 As==10");
 730         }
 731       else if (regs == 3)
 732         {
 733           *cycles = 1;
 734           sprintf (op1, "#2");
 735           sprintf (comm1, "r3 As==10");
 736         }
 737       else
 738         {
 739           /* Indexed register mode @Rn.  */
 740           *cycles = 2;
 741           sprintf (op1, "@r%d", regs);
 742         }
 743     }
 744   else if (as == 3)
 745     {
 746       if (regs == 2)
 747         {
 748           *cycles = 1;
 749           sprintf (op1, "#8");
 750           sprintf (comm1, "r2 As==11");
 751         }
 752       else if (regs == 3)
 753         {
 754           *cycles = 1;
 755           sprintf (op1, "#-1");
 756           sprintf (comm1, "r3 As==11");
 757         }
 758       else if (regs == 0)
 759         {
 760           /* Absolute. @pc+  */
 761           *cycles = 3;
 762           dst = msp430dis_opcode (addr + 2, info);
 763           cmd_len += 2;
 764           sprintf (op1, "#0x%04x", PS (dst));
 765         }
 766       else
 767         {
 768           *cycles = 2;
 769           sprintf (op1, "@r%d+", regs);
 770         }
 771     }
 772   else if (as == 1)
 773     {
 774       * cycles = 3;
 775
 776       if (regs == 0)
 777         {
 778           /* PC relative.  */
 779           dst = msp430dis_opcode (addr + 2, info);
 780           cmd_len += 2;
 781           (*cycles)++;
 782           sprintf (op1, "0x%04x", PS (dst));
 783           sprintf (comm1, "PC rel. 0x%04x",
 784                    PS ((short) addr + 2 + dst));
 785         }
 786       else if (regs == 2)
 787         {
 788           /* Absolute.  */
 789           dst = msp430dis_opcode (addr + 2, info);
 790           cmd_len += 2;
 791           sprintf (op1, "&0x%04x", PS (dst));
 792         }
 793       else if (regs == 3)
 794         {
 795           (*cycles)--;
 796           sprintf (op1, "#1");
 797           sprintf (comm1, "r3 As==01");
 798         }
 799       else
 800         {
 801           /* Indexd.  */
 802           dst = msp430dis_opcode (addr + 2, info);
 803           cmd_len += 2;
 804           sprintf (op1, "%d(r%d)", dst, regs);
 805         }
 806     }
 807
 808   return cmd_len;
 809 }