opcodes/h8300-dis.c

   1 /* Disassemble h8300 instructions.
   2    Copyright (C) 1993-2020 Free Software Foundation, Inc.
   3
   4    This file is part of the GNU opcodes library.
   5
   6    This library is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    It is distributed in the hope that it will be useful, but WITHOUT
  12    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  14    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,
  19    MA 02110-1301, USA.  */
  20
  21 #define DEFINE_TABLE
  22
  23 #include "sysdep.h"
  24 #define h8_opcodes h8ops
  25 #include "opcode/h8300.h"
  26 #include "disassemble.h"
  27 #include "opintl.h"
  28 #include "libiberty.h"
  29
  30 struct h8_instruction
  31 {
  32   unsigned int length;
  33   const struct h8_opcode *opcode;
  34 };
  35
  36 struct h8_instruction *h8_instructions;
  37
  38 /* Run through the opcodes and sort them into order to make them easy
  39    to disassemble.  */
  40
  41 static void
  42 bfd_h8_disassemble_init (void)
  43 {
  44   unsigned int i;
  45   unsigned int nopcodes;
  46   const struct h8_opcode *p;
  47   struct h8_instruction *pi;
  48
  49   nopcodes = sizeof (h8_opcodes) / sizeof (struct h8_opcode);
  50
  51   h8_instructions = xmalloc (nopcodes * sizeof (struct h8_instruction));
  52
  53   for (p = h8_opcodes, pi = h8_instructions; p->name; p++, pi++)
  54     {
  55       /* Just make sure there are an even number of nibbles in it, and
  56          that the count is the same as the length.  */
  57       for (i = 0; p->data.nib[i] != (op_type) E; i++)
  58         ;
  59       OPCODES_ASSERT (!(i & 1));
  60
  61       pi->length = i / 2;
  62       pi->opcode = p;
  63     }
  64
  65   /* Add entry for the NULL vector terminator.  */
  66   pi->length = 0;
  67   pi->opcode = p;
  68 }
  69
  70 static void
  71 extract_immediate (FILE *stream,
  72                    op_type looking_for,
  73                    int thisnib,
  74                    unsigned char *data,
  75                    int *cst,
  76                    int *len,
  77                    const struct h8_opcode *q)
  78 {
  79   switch (looking_for & SIZE)
  80     {
  81     case L_2:
  82       *len = 2;
  83       *cst = thisnib & 3;
  84
  85       /* DISP2 special treatment.  */
  86       if ((looking_for & MODE) == DISP)
  87         {
  88           if (OP_KIND (q->how) == O_MOVAB
  89               || OP_KIND (q->how) == O_MOVAW
  90               || OP_KIND (q->how) == O_MOVAL)
  91             {
  92               /* Handling for mova insn.  */
  93               switch (q->args.nib[0] & MODE)
  94                 {
  95                 case INDEXB:
  96                 default:
  97                   break;
  98                 case INDEXW:
  99                   *cst *= 2;
 100                   break;
 101                 case INDEXL:
 102                   *cst *= 4;
 103                   break;
 104                 }
 105             }
 106           else
 107             {
 108               /* Handling for non-mova insn.  */
 109               switch (OP_SIZE (q->how))
 110                 {
 111                 default: break;
 112                 case SW:
 113                   *cst *= 2;
 114                   break;
 115                 case SL:
 116                   *cst *= 4;
 117                   break;
 118                 }
 119             }
 120         }
 121       break;
 122     case L_8:
 123       *len = 8;
 124       *cst = data[0];
 125       break;
 126     case L_16:
 127     case L_16U:
 128       *len = 16;
 129       *cst = (data[0] << 8) + data [1];
 130 #if 0
 131       if ((looking_for & SIZE) == L_16)
 132         *cst = (short) *cst;    /* Sign extend.  */
 133 #endif
 134       break;
 135     case L_32:
 136       *len = 32;
 137       *cst = (((unsigned) data[0] << 24) + (data[1] << 16)
 138               + (data[2] << 8) + data[3]);
 139       break;
 140     default:
 141       *len = 0;
 142       *cst = 0;
 143       fprintf (stream, "DISP bad size\n");
 144       break;
 145     }
 146 }
 147
 148 static const char *regnames[] =
 149 {
 150   "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h",
 151   "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l"
 152 };
 153 static const char *wregnames[] =
 154 {
 155   "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
 156   "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7"
 157 };
 158 static const char *lregnames[] =
 159 {
 160   "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7",
 161   "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7"
 162 };
 163 static const char *cregnames[] =
 164 {
 165   "ccr", "exr", "mach", "macl", "", "", "vbr", "sbr"
 166 };
 167
 168 static void
 169 print_one_arg (disassemble_info *info,
 170                bfd_vma addr,
 171                op_type x,
 172                int cst,
 173                int cstlen,
 174                int rdisp_n,
 175                int rn,
 176                const char **pregnames,
 177                int len)
 178 {
 179   void * stream = info->stream;
 180   fprintf_ftype outfn = info->fprintf_func;
 181
 182   if ((x & SIZE) == L_3 || (x & SIZE) == L_3NZ)
 183     outfn (stream, "#0x%x", (unsigned) cst);
 184   else if ((x & MODE) == IMM)
 185     outfn (stream, "#0x%x", (unsigned) cst);
 186   else if ((x & MODE) == DBIT || (x & MODE) == KBIT)
 187     outfn (stream, "#%d", (unsigned) cst);
 188   else if ((x & MODE) == CONST_2)
 189     outfn (stream, "#2");
 190   else if ((x & MODE) == CONST_4)
 191     outfn (stream, "#4");
 192   else if ((x & MODE) == CONST_8)
 193     outfn (stream, "#8");
 194   else if ((x & MODE) == CONST_16)
 195     outfn (stream, "#16");
 196   else if ((x & MODE) == REG)
 197     {
 198       switch (x & SIZE)
 199         {
 200         case L_8:
 201           outfn (stream, "%s", regnames[rn]);
 202           break;
 203         case L_16:
 204         case L_16U:
 205           outfn (stream, "%s", wregnames[rn]);
 206           break;
 207         case L_P:
 208         case L_32:
 209           outfn (stream, "%s", lregnames[rn]);
 210           break;
 211         }
 212     }
 213   else if ((x & MODE) == LOWREG)
 214     {
 215       switch (x & SIZE)
 216         {
 217         case L_8:
 218           /* Always take low half of reg.  */
 219           outfn (stream, "%s.b", regnames[rn < 8 ? rn + 8 : rn]);
 220           break;
 221         case L_16:
 222         case L_16U:
 223           /* Always take low half of reg.  */
 224           outfn (stream, "%s.w", wregnames[rn < 8 ? rn : rn - 8]);
 225           break;
 226         case L_P:
 227         case L_32:
 228           outfn (stream, "%s.l", lregnames[rn]);
 229           break;
 230         }
 231     }
 232   else if ((x & MODE) == POSTINC)
 233     outfn (stream, "@%s+", pregnames[rn]);
 234
 235   else if ((x & MODE) == POSTDEC)
 236     outfn (stream, "@%s-", pregnames[rn]);
 237
 238   else if ((x & MODE) == PREINC)
 239     outfn (stream, "@+%s", pregnames[rn]);
 240
 241   else if ((x & MODE) == PREDEC)
 242     outfn (stream, "@-%s", pregnames[rn]);
 243
 244   else if ((x & MODE) == IND)
 245     outfn (stream, "@%s", pregnames[rn]);
 246
 247   else if ((x & MODE) == ABS || (x & ABSJMP))
 248     outfn (stream, "@0x%x:%d", (unsigned) cst, cstlen);
 249
 250   else if ((x & MODE) == MEMIND)
 251     outfn (stream, "@@%d (0x%x)", cst, cst);
 252
 253   else if ((x & MODE) == VECIND)
 254     {
 255       /* FIXME Multiplier should be 2 or 4, depending on processor mode,
 256          by which is meant "normal" vs. "middle", "advanced", "maximum".  */
 257
 258       int offset = (cst + 0x80) * 4;
 259       outfn (stream, "@@%d (0x%x)", offset, offset);
 260     }
 261   else if ((x & MODE) == PCREL)
 262     {
 263       if ((x & SIZE) == L_16 ||
 264           (x & SIZE) == L_16U)
 265         {
 266           outfn (stream, ".%s%d (0x%lx)",
 267                    (short) cst > 0 ? "+" : "",
 268                    (short) cst,
 269                    (long)(addr + (short) cst + len));
 270         }
 271       else
 272         {
 273           outfn (stream, ".%s%d (0x%lx)",
 274                    (char) cst > 0 ? "+" : "",
 275                    (char) cst,
 276                    (long)(addr + (char) cst + len));
 277         }
 278     }
 279   else if ((x & MODE) == DISP)
 280     outfn (stream, "@(0x%x:%d,%s)", cst, cstlen, pregnames[rdisp_n]);
 281
 282   else if ((x & MODE) == INDEXB)
 283     /* Always take low half of reg.  */
 284     outfn (stream, "@(0x%x:%d,%s.b)", cst, cstlen,
 285            regnames[rdisp_n < 8 ? rdisp_n + 8 : rdisp_n]);
 286
 287   else if ((x & MODE) == INDEXW)
 288     /* Always take low half of reg.  */
 289     outfn (stream, "@(0x%x:%d,%s.w)", cst, cstlen,
 290            wregnames[rdisp_n < 8 ? rdisp_n : rdisp_n - 8]);
 291
 292   else if ((x & MODE) == INDEXL)
 293     outfn (stream, "@(0x%x:%d,%s.l)", cst, cstlen, lregnames[rdisp_n]);
 294
 295   else if (x & CTRL)
 296     outfn (stream, "%s", cregnames[rn]);
 297
 298   else if ((x & MODE) == CCR)
 299     outfn (stream, "ccr");
 300
 301   else if ((x & MODE) == EXR)
 302     outfn (stream, "exr");
 303
 304   else if ((x & MODE) == MACREG)
 305     outfn (stream, "mac%c", cst ? 'l' : 'h');
 306
 307   else
 308     /* xgettext:c-format */
 309     outfn (stream, _("Hmmmm 0x%x"), x);
 310 }
 311
 312 static unsigned int
 313 bfd_h8_disassemble (bfd_vma addr, disassemble_info *info, int mach)
 314 {
 315   /* Find the first entry in the table for this opcode.  */
 316   int regno[3] = { 0, 0, 0 };
 317   int dispregno[3] = { 0, 0, 0 };
 318   int cst[3] = { 0, 0, 0 };
 319   int cstlen[3] = { 0, 0, 0 };
 320   static bfd_boolean init = 0;
 321   const struct h8_instruction *qi;
 322   char const **pregnames = mach != 0 ? lregnames : wregnames;
 323   int status;
 324   unsigned int maxlen;
 325   unsigned char data[MAX_CODE_NIBBLES / 2];
 326   void *stream = info->stream;
 327   fprintf_ftype outfn = info->fprintf_func;
 328
 329   if (!init)
 330     {
 331       bfd_h8_disassemble_init ();
 332       init = 1;
 333     }
 334
 335   status = info->read_memory_func (addr, data, 2, info);
 336   if (status != 0)
 337     {
 338       info->memory_error_func (status, addr, info);
 339       return -1;
 340     }
 341
 342   for (maxlen = 2; maxlen < sizeof (data); maxlen += 2)
 343     {
 344       status = info->read_memory_func (addr + maxlen, data + maxlen, 2, info);
 345       if (status != 0)
 346         break;
 347     }
 348
 349   /* Find the exact opcode/arg combo.  */
 350   for (qi = h8_instructions; qi->opcode->name; qi++)
 351     {
 352       const struct h8_opcode *q;
 353       const op_type *nib;
 354       unsigned int len;
 355       op_type looking_for;
 356
 357       if (qi->length > maxlen)
 358         continue;
 359
 360       q = qi->opcode;
 361       nib = q->data.nib;
 362       len = 0;
 363       while ((looking_for = *nib) != (op_type) E)
 364         {
 365           int thisnib;
 366           int opnr;
 367
 368           OPCODES_ASSERT (len / 2 < maxlen);
 369           thisnib = data[len / 2];
 370           thisnib = (len & 1) ? (thisnib & 0xf) : ((thisnib / 16) & 0xf);
 371           opnr = ((looking_for & OP3) == OP3 ? 2
 372                   : (looking_for & DST) == DST ? 1 : 0);
 373
 374           if (looking_for < 16 && looking_for >= 0)
 375             {
 376               if (looking_for != thisnib)
 377                 goto fail;
 378             }
 379           else
 380             {
 381               if ((int) looking_for & (int) B31)
 382                 {
 383                   if (!((thisnib & 0x8) != 0))
 384                     goto fail;
 385
 386                   looking_for = (op_type) ((int) looking_for & ~(int) B31);
 387                   thisnib &= 0x7;
 388                 }
 389               else if ((int) looking_for & (int) B30)
 390                 {
 391                   if (!((thisnib & 0x8) == 0))
 392                     goto fail;
 393
 394                   looking_for = (op_type) ((int) looking_for & ~(int) B30);
 395                 }
 396
 397               if ((int) looking_for & (int) B21)
 398                 {
 399                   if (!((thisnib & 0x4) != 0))
 400                     goto fail;
 401
 402                   looking_for = (op_type) ((int) looking_for & ~(int) B21);
 403                   thisnib &= 0xb;
 404                 }
 405               else if ((int) looking_for & (int) B20)
 406                 {
 407                   if (!((thisnib & 0x4) == 0))
 408                     goto fail;
 409
 410                   looking_for = (op_type) ((int) looking_for & ~(int) B20);
 411                 }
 412               if ((int) looking_for & (int) B11)
 413                 {
 414                   if (!((thisnib & 0x2) != 0))
 415                     goto fail;
 416
 417                   looking_for = (op_type) ((int) looking_for & ~(int) B11);
 418                   thisnib &= 0xd;
 419                 }
 420               else if ((int) looking_for & (int) B10)
 421                 {
 422                   if (!((thisnib & 0x2) == 0))
 423                     goto fail;
 424
 425                   looking_for = (op_type) ((int) looking_for & ~(int) B10);
 426                 }
 427
 428               if ((int) looking_for & (int) B01)
 429                 {
 430                   if (!((thisnib & 0x1) != 0))
 431                     goto fail;
 432
 433                   looking_for = (op_type) ((int) looking_for & ~(int) B01);
 434                   thisnib &= 0xe;
 435                 }
 436               else if ((int) looking_for & (int) B00)
 437                 {
 438                   if (!((thisnib & 0x1) == 0))
 439                     goto fail;
 440
 441                   looking_for = (op_type) ((int) looking_for & ~(int) B00);
 442                 }
 443
 444               if (looking_for & IGNORE)
 445                 {
 446                   /* Hitachi has declared that IGNORE must be zero.  */
 447                   if (thisnib != 0)
 448                     goto fail;
 449                 }
 450               else if ((looking_for & MODE) == DATA)
 451                 {
 452                   ;                     /* Skip embedded data.  */
 453                 }
 454               else if ((looking_for & MODE) == DBIT)
 455                 {
 456                   /* Exclude adds/subs by looking at bit 0 and 2, and
 457                      make sure the operand size, either w or l,
 458                      matches by looking at bit 1.  */
 459                   if ((looking_for & 7) != (thisnib & 7))
 460                     goto fail;
 461
 462                   cst[opnr] = (thisnib & 0x8) ? 2 : 1;
 463                 }
 464               else if ((looking_for & MODE) == DISP
 465                        || (looking_for & MODE) == ABS
 466                        || (looking_for & MODE) == PCREL
 467                        || (looking_for & MODE) == INDEXB
 468                        || (looking_for & MODE) == INDEXW
 469                        || (looking_for & MODE) == INDEXL)
 470                 {
 471                   int extra;
 472                   switch (looking_for & SIZE)
 473                     {
 474                     case L_16:
 475                     case L_16U:
 476                       extra = 1;
 477                       break;
 478                     case L_32:
 479                       extra = 3;
 480                       break;
 481                     default:
 482                       extra = 0;
 483                       break;
 484                     }
 485                   OPCODES_ASSERT (len / 2 + extra < maxlen);
 486                   extract_immediate (stream, looking_for, thisnib,
 487                                      data + len / 2, cst + opnr,
 488                                      cstlen + opnr, q);
 489                   /* Even address == bra, odd == bra/s.  */
 490                   if (q->how == O (O_BRAS, SB))
 491                     cst[opnr] -= 1;
 492                 }
 493               else if ((looking_for & MODE) == REG
 494                        || (looking_for & MODE) == LOWREG
 495                        || (looking_for & MODE) == IND
 496                        || (looking_for & MODE) == PREINC
 497                        || (looking_for & MODE) == POSTINC
 498                        || (looking_for & MODE) == PREDEC
 499                        || (looking_for & MODE) == POSTDEC)
 500                 {
 501                   regno[opnr] = thisnib;
 502                 }
 503               else if (looking_for & CTRL)      /* Control Register.  */
 504                 {
 505                   thisnib &= 7;
 506                   if (((looking_for & MODE) == CCR  && (thisnib != C_CCR))
 507                       || ((looking_for & MODE) == EXR  && (thisnib != C_EXR))
 508                       || ((looking_for & MODE) == MACH && (thisnib != C_MACH))
 509                       || ((looking_for & MODE) == MACL && (thisnib != C_MACL))
 510                       || ((looking_for & MODE) == VBR  && (thisnib != C_VBR))
 511                       || ((looking_for & MODE) == SBR  && (thisnib != C_SBR)))
 512                     goto fail;
 513                   if (((looking_for & MODE) == CCR_EXR
 514                        && (thisnib != C_CCR && thisnib != C_EXR))
 515                       || ((looking_for & MODE) == VBR_SBR
 516                           && (thisnib != C_VBR && thisnib != C_SBR))
 517                       || ((looking_for & MODE) == MACREG
 518                           && (thisnib != C_MACH && thisnib != C_MACL)))
 519                     goto fail;
 520                   if (((looking_for & MODE) == CC_EX_VB_SB
 521                        && (thisnib != C_CCR && thisnib != C_EXR
 522                            && thisnib != C_VBR && thisnib != C_SBR)))
 523                     goto fail;
 524
 525                   regno[opnr] = thisnib;
 526                 }
 527               else if ((looking_for & SIZE) == L_5)
 528                 {
 529                   cst[opnr] = data[len / 2] & 31;
 530                   cstlen[opnr] = 5;
 531                 }
 532               else if ((looking_for & SIZE) == L_4)
 533                 {
 534                   cst[opnr] = thisnib;
 535                   cstlen[opnr] = 4;
 536                 }
 537               else if ((looking_for & SIZE) == L_16
 538                        || (looking_for & SIZE) == L_16U)
 539                 {
 540                   OPCODES_ASSERT (len / 2 + 1 < maxlen);
 541                   cst[opnr] = (data[len / 2]) * 256 + data[(len + 2) / 2];
 542                   cstlen[opnr] = 16;
 543                 }
 544               else if ((looking_for & MODE) == MEMIND)
 545                 {
 546                   cst[opnr] = data[1];
 547                 }
 548               else if ((looking_for & MODE) == VECIND)
 549                 {
 550                   cst[opnr] = data[1] & 0x7f;
 551                 }
 552               else if ((looking_for & SIZE) == L_32)
 553                 {
 554                   unsigned int i = len / 2;
 555
 556                   OPCODES_ASSERT (i + 3 < maxlen);
 557                   cst[opnr] = (((unsigned) data[i] << 24)
 558                                | (data[i + 1] << 16)
 559                                | (data[i + 2] << 8)
 560                                | (data[i + 3]));
 561
 562                   cstlen[opnr] = 32;
 563                 }
 564               else if ((looking_for & SIZE) == L_24)
 565                 {
 566                   unsigned int i = len / 2;
 567
 568                   OPCODES_ASSERT (i + 2 < maxlen);
 569                   cst[opnr] =
 570                     (data[i] << 16) | (data[i + 1] << 8) | (data[i + 2]);
 571                   cstlen[opnr] = 24;
 572                 }
 573               else if (looking_for & DISPREG)
 574                 {
 575                   dispregno[opnr] = thisnib & 7;
 576                 }
 577               else if ((looking_for & MODE) == KBIT)
 578                 {
 579                   switch (thisnib)
 580                     {
 581                     case 9:
 582                       cst[opnr] = 4;
 583                       break;
 584                     case 8:
 585                       cst[opnr] = 2;
 586                       break;
 587                     case 0:
 588                       cst[opnr] = 1;
 589                       break;
 590                     default:
 591                       goto fail;
 592                     }
 593                 }
 594               else if ((looking_for & SIZE) == L_8)
 595                 {
 596                   cstlen[opnr] = 8;
 597                   cst[opnr] = data[len / 2];
 598                 }
 599               else if ((looking_for & SIZE) == L_3
 600                        || (looking_for & SIZE) == L_3NZ)
 601                 {
 602                   cst[opnr] = thisnib & 0x7;
 603                   if (cst[opnr] == 0 && (looking_for & SIZE) == L_3NZ)
 604                     goto fail;
 605                 }
 606               else if ((looking_for & SIZE) == L_2)
 607                 {
 608                   cstlen[opnr] = 2;
 609                   cst[opnr] = thisnib & 0x3;
 610                 }
 611               else if ((looking_for & MODE) == MACREG)
 612                 {
 613                   cst[opnr] = (thisnib == 3);
 614                 }
 615               else
 616                 /* xgettext:c-format */
 617                 outfn (stream, _("Don't understand 0x%x \n"), looking_for);
 618             }
 619
 620           len++;
 621           nib++;
 622         }
 623
 624       outfn (stream, "%s\t", q->name);
 625
 626       /* Gross.  Disgusting.  */
 627       if (strcmp (q->name, "ldm.l") == 0)
 628         {
 629           int count, high;
 630
 631           count = (data[1] / 16) & 0x3;
 632           high = regno[1];
 633
 634           outfn (stream, "@sp+,er%d-er%d", high - count, high);
 635           return qi->length;
 636         }
 637
 638       if (strcmp (q->name, "stm.l") == 0)
 639         {
 640           int count, low;
 641
 642           count = (data[1] / 16) & 0x3;
 643           low = regno[0];
 644
 645           outfn (stream, "er%d-er%d,@-sp", low, low + count);
 646           return qi->length;
 647         }
 648       if (strcmp (q->name, "rte/l") == 0
 649           || strcmp (q->name, "rts/l") == 0)
 650         {
 651           if (regno[0] == 0)
 652             outfn (stream, "er%d", regno[1]);
 653           else
 654             outfn (stream, "er%d-er%d", regno[1] - regno[0],
 655                    regno[1]);
 656           return qi->length;
 657         }
 658       if (CONST_STRNEQ (q->name, "mova"))
 659         {
 660           const op_type *args = q->args.nib;
 661
 662           if (args[1] == (op_type) E)
 663             {
 664               /* Short form.  */
 665               print_one_arg (info, addr, args[0], cst[0],
 666                              cstlen[0], dispregno[0], regno[0],
 667                              pregnames, qi->length);
 668               outfn (stream, ",er%d", dispregno[0]);
 669             }
 670           else
 671             {
 672               outfn (stream, "@(0x%x:%d,", cst[0], cstlen[0]);
 673               print_one_arg (info, addr, args[1], cst[1],
 674                              cstlen[1], dispregno[1], regno[1],
 675                              pregnames, qi->length);
 676               outfn (stream, ".%c),",
 677                      (args[0] & MODE) == INDEXB ? 'b' : 'w');
 678               print_one_arg (info, addr, args[2], cst[2],
 679                              cstlen[2], dispregno[2], regno[2],
 680                              pregnames, qi->length);
 681             }
 682           return qi->length;
 683         }
 684       /* Fill in the args.  */
 685       {
 686         const op_type *args = q->args.nib;
 687         int hadone = 0;
 688         int nargs;
 689
 690         /* Special case handling for the adds and subs instructions
 691            since in H8 mode thay can only take the r0-r7 registers
 692            but in other (higher) modes they can take the er0-er7
 693            registers as well.  */
 694         if (strcmp (qi->opcode->name, "adds") == 0
 695             || strcmp (qi->opcode->name, "subs") == 0)
 696           {
 697             outfn (stream, "#%d,%s", cst[0], pregnames[regno[1] & 0x7]);
 698             return qi->length;
 699           }
 700
 701         for (nargs = 0;
 702              nargs < 3 && args[nargs] != (op_type) E;
 703              nargs++)
 704           {
 705             int x = args[nargs];
 706
 707             if (hadone)
 708               outfn (stream, ",");
 709
 710             print_one_arg (info, addr, x,
 711                            cst[nargs], cstlen[nargs],
 712                            dispregno[nargs], regno[nargs],
 713                            pregnames, qi->length);
 714
 715             hadone = 1;
 716           }
 717       }
 718       return qi->length;
 719
 720     fail:
 721       ;
 722     }
 723
 724   /* Fell off the end.  */
 725   outfn (stream, ".word\tH'%x,H'%x", data[0], data[1]);
 726   return 2;
 727 }
 728
 729 int
 730 print_insn_h8300 (bfd_vma addr, disassemble_info *info)
 731 {
 732   return bfd_h8_disassemble (addr, info, 0);
 733 }
 734
 735 int
 736 print_insn_h8300h (bfd_vma addr, disassemble_info *info)
 737 {
 738   return bfd_h8_disassemble (addr, info, 1);
 739 }
 740
 741 int
 742 print_insn_h8300s (bfd_vma addr, disassemble_info *info)
 743 {
 744   return bfd_h8_disassemble (addr, info, 2);
 745 }