opcodes/m68hc11-dis.c

   1 /* m68hc11-dis.c -- Motorola 68HC11 & 68HC12 disassembly
   2    Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   3    Written by Stephane Carrez (stcarrez@nerim.fr)
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #include <stdio.h>
  20
  21 #include "ansidecl.h"
  22 #include "opcode/m68hc11.h"
  23 #include "dis-asm.h"
  24
  25 static const char *const reg_name[] = {
  26   "X", "Y", "SP", "PC"
  27 };
  28
  29 static const char *const reg_src_table[] = {
  30   "A", "B", "CCR", "TMP3", "D", "X", "Y", "SP"
  31 };
  32
  33 static const char *const reg_dst_table[] = {
  34   "A", "B", "CCR", "TMP2", "D", "X", "Y", "SP"
  35 };
  36
  37 #define OP_PAGE_MASK (M6811_OP_PAGE2|M6811_OP_PAGE3|M6811_OP_PAGE4)
  38
  39 /* Prototypes for local functions.  */
  40 static int read_memory
  41   PARAMS ((bfd_vma, bfd_byte *, int, struct disassemble_info *));
  42 static int print_indexed_operand
  43   PARAMS ((bfd_vma, struct disassemble_info *, int*, int));
  44 static int print_insn
  45   PARAMS ((bfd_vma, struct disassemble_info *, int));
  46
  47 static int
  48 read_memory (memaddr, buffer, size, info)
  49      bfd_vma memaddr;
  50      bfd_byte *buffer;
  51      int size;
  52      struct disassemble_info *info;
  53 {
  54   int status;
  55
  56   /* Get first byte.  Only one at a time because we don't know the
  57      size of the insn.  */
  58   status = (*info->read_memory_func) (memaddr, buffer, size, info);
  59   if (status != 0)
  60     {
  61       (*info->memory_error_func) (status, memaddr, info);
  62       return -1;
  63     }
  64   return 0;
  65 }
  66
  67
  68 /* Read the 68HC12 indexed operand byte and print the corresponding mode.
  69    Returns the number of bytes read or -1 if failure.  */
  70 static int
  71 print_indexed_operand (memaddr, info, indirect, mov_insn)
  72      bfd_vma memaddr;
  73      struct disassemble_info *info;
  74      int *indirect;
  75      int mov_insn;
  76 {
  77   bfd_byte buffer[4];
  78   int reg;
  79   int status;
  80   short sval;
  81   int pos = 1;
  82
  83   if (indirect)
  84     *indirect = 0;
  85
  86   status = read_memory (memaddr, &buffer[0], 1, info);
  87   if (status != 0)
  88     {
  89       return status;
  90     }
  91
  92   /* n,r with 5-bits signed constant.  */
  93   if ((buffer[0] & 0x20) == 0)
  94     {
  95       reg = (buffer[0] >> 6) & 3;
  96       sval = (buffer[0] & 0x1f);
  97       if (sval & 0x10)
  98         sval |= 0xfff0;
  99       (*info->fprintf_func) (info->stream, "%d,%s",
 100                              (int) sval, reg_name[reg]);
 101     }
 102
 103   /* Auto pre/post increment/decrement.  */
 104   else if ((buffer[0] & 0xc0) != 0xc0)
 105     {
 106       const char *mode;
 107
 108       reg = (buffer[0] >> 6) & 3;
 109       sval = (buffer[0] & 0x0f);
 110       if (sval & 0x8)
 111         {
 112           sval |= 0xfff0;
 113           sval = -sval;
 114           mode = "-";
 115         }
 116       else
 117         {
 118           sval = sval + 1;
 119           mode = "+";
 120         }
 121       (*info->fprintf_func) (info->stream, "%d,%s%s%s",
 122                              (int) sval,
 123                              (buffer[0] & 0x10 ? "" : mode),
 124                              reg_name[reg], (buffer[0] & 0x10 ? mode : ""));
 125     }
 126
 127   /* [n,r] 16-bits offset indexed indirect.  */
 128   else if ((buffer[0] & 0x07) == 3)
 129     {
 130       if (mov_insn)
 131         {
 132           (*info->fprintf_func) (info->stream, "<invalid op: 0x%x>",
 133                                  buffer[0] & 0x0ff);
 134           return 0;
 135         }
 136       reg = (buffer[0] >> 3) & 0x03;
 137       status = read_memory (memaddr + pos, &buffer[0], 2, info);
 138       if (status != 0)
 139         {
 140           return status;
 141         }
 142
 143       pos += 2;
 144       sval = ((buffer[0] << 8) | (buffer[1] & 0x0FF));
 145       (*info->fprintf_func) (info->stream, "[%u,%s]",
 146                              sval & 0x0ffff, reg_name[reg]);
 147       if (indirect)
 148         *indirect = 1;
 149     }
 150   else if ((buffer[0] & 0x4) == 0)
 151     {
 152       if (mov_insn)
 153         {
 154           (*info->fprintf_func) (info->stream, "<invalid op: 0x%x>",
 155                                  buffer[0] & 0x0ff);
 156           return 0;
 157         }
 158       reg = (buffer[0] >> 3) & 0x03;
 159       status = read_memory (memaddr + pos,
 160                             &buffer[1], (buffer[0] & 0x2 ? 2 : 1), info);
 161       if (status != 0)
 162         {
 163           return status;
 164         }
 165       if (buffer[0] & 2)
 166         {
 167           sval = ((buffer[1] << 8) | (buffer[2] & 0x0FF));
 168           sval &= 0x0FFFF;
 169           pos += 2;
 170         }
 171       else
 172         {
 173           sval = buffer[1] & 0x00ff;
 174           if (buffer[0] & 0x01)
 175             sval |= 0xff00;
 176           pos++;
 177         }
 178       (*info->fprintf_func) (info->stream, "%d,%s",
 179                              (int) sval, reg_name[reg]);
 180     }
 181   else
 182     {
 183       reg = (buffer[0] >> 3) & 0x03;
 184       switch (buffer[0] & 3)
 185         {
 186         case 0:
 187           (*info->fprintf_func) (info->stream, "A,%s", reg_name[reg]);
 188           break;
 189         case 1:
 190           (*info->fprintf_func) (info->stream, "B,%s", reg_name[reg]);
 191           break;
 192         case 2:
 193           (*info->fprintf_func) (info->stream, "D,%s", reg_name[reg]);
 194           break;
 195         case 3:
 196         default:
 197           (*info->fprintf_func) (info->stream, "[D,%s]", reg_name[reg]);
 198           if (indirect)
 199             *indirect = 1;
 200           break;
 201         }
 202     }
 203
 204   return pos;
 205 }
 206
 207 /* Disassemble one instruction at address 'memaddr'.  Returns the number
 208    of bytes used by that instruction.  */
 209 static int
 210 print_insn (memaddr, info, arch)
 211      bfd_vma memaddr;
 212      struct disassemble_info *info;
 213      int arch;
 214 {
 215   int status;
 216   bfd_byte buffer[4];
 217   unsigned char code;
 218   long format, pos, i;
 219   short sval;
 220   const struct m68hc11_opcode *opcode;
 221
 222   /* Get first byte.  Only one at a time because we don't know the
 223      size of the insn.  */
 224   status = read_memory (memaddr, buffer, 1, info);
 225   if (status != 0)
 226     {
 227       return status;
 228     }
 229
 230   format = 0;
 231   code = buffer[0];
 232   pos = 0;
 233
 234   /* Look for page2,3,4 opcodes.  */
 235   if (code == M6811_OPCODE_PAGE2)
 236     {
 237       pos++;
 238       format = M6811_OP_PAGE2;
 239     }
 240   else if (code == M6811_OPCODE_PAGE3 && arch == cpu6811)
 241     {
 242       pos++;
 243       format = M6811_OP_PAGE3;
 244     }
 245   else if (code == M6811_OPCODE_PAGE4 && arch == cpu6811)
 246     {
 247       pos++;
 248       format = M6811_OP_PAGE4;
 249     }
 250
 251   /* We are in page2,3,4; get the real opcode.  */
 252   if (pos == 1)
 253     {
 254       status = read_memory (memaddr + pos, &buffer[1], 1, info);
 255       if (status != 0)
 256         {
 257           return status;
 258         }
 259       code = buffer[1];
 260     }
 261
 262
 263   /* Look first for a 68HC12 alias.  All of them are 2-bytes long and
 264      in page 1.  There is no operand to print.  We read the second byte
 265      only when we have a possible match.  */
 266   if ((arch & cpu6812) && format == 0)
 267     {
 268       int must_read = 1;
 269
 270       /* Walk the alias table to find a code1+code2 match.  */
 271       for (i = 0; i < m68hc12_num_alias; i++)
 272         {
 273           if (m68hc12_alias[i].code1 == code)
 274             {
 275               if (must_read)
 276                 {
 277                   status = read_memory (memaddr + pos + 1,
 278                                         &buffer[1], 1, info);
 279                   if (status != 0)
 280                     break;
 281
 282                   must_read = 1;
 283                 }
 284               if (m68hc12_alias[i].code2 == (unsigned char) buffer[1])
 285                 {
 286                   (*info->fprintf_func) (info->stream, "%s",
 287                                          m68hc12_alias[i].name);
 288                   return 2;
 289                 }
 290             }
 291         }
 292     }
 293
 294   pos++;
 295
 296   /* Scan the opcode table until we find the opcode
 297      with the corresponding page.  */
 298   opcode = m68hc11_opcodes;
 299   for (i = 0; i < m68hc11_num_opcodes; i++, opcode++)
 300     {
 301       int offset;
 302
 303       if ((opcode->arch & arch) == 0)
 304         continue;
 305       if (opcode->opcode != code)
 306         continue;
 307       if ((opcode->format & OP_PAGE_MASK) != format)
 308         continue;
 309
 310       if (opcode->format & M6812_OP_REG)
 311         {
 312           int j;
 313           int is_jump;
 314
 315           if (opcode->format & M6811_OP_JUMP_REL)
 316             is_jump = 1;
 317           else
 318             is_jump = 0;
 319
 320           status = read_memory (memaddr + pos, &buffer[0], 1, info);
 321           if (status != 0)
 322             {
 323               return status;
 324             }
 325           for (j = 0; i + j < m68hc11_num_opcodes; j++)
 326             {
 327               if ((opcode[j].arch & arch) == 0)
 328                 continue;
 329               if (opcode[j].opcode != code)
 330                 continue;
 331               if (is_jump)
 332                 {
 333                   if (!(opcode[j].format & M6811_OP_JUMP_REL))
 334                     continue;
 335
 336                   if ((opcode[j].format & M6812_OP_IBCC_MARKER)
 337                       && (buffer[0] & 0xc0) != 0x80)
 338                     continue;
 339                   if ((opcode[j].format & M6812_OP_TBCC_MARKER)
 340                       && (buffer[0] & 0xc0) != 0x40)
 341                     continue;
 342                   if ((opcode[j].format & M6812_OP_DBCC_MARKER)
 343                       && (buffer[0] & 0xc0) != 0)
 344                     continue;
 345                   if ((opcode[j].format & M6812_OP_EQ_MARKER)
 346                       && (buffer[0] & 0x20) == 0)
 347                     break;
 348                   if (!(opcode[j].format & M6812_OP_EQ_MARKER)
 349                       && (buffer[0] & 0x20) != 0)
 350                     break;
 351                   continue;
 352                 }
 353               if (opcode[j].format & M6812_OP_EXG_MARKER && buffer[0] & 0x80)
 354                 break;
 355               if ((opcode[j].format & M6812_OP_SEX_MARKER)
 356                   && (((buffer[0] & 0x07) >= 3 && (buffer[0] & 7) <= 7))
 357                   && ((buffer[0] & 0x0f0) <= 0x20))
 358                 break;
 359               if (opcode[j].format & M6812_OP_TFR_MARKER
 360                   && !(buffer[0] & 0x80))
 361                 break;
 362             }
 363           if (i + j < m68hc11_num_opcodes)
 364             opcode = &opcode[j];
 365         }
 366
 367       /* We have found the opcode.  Extract the operand and print it.  */
 368       (*info->fprintf_func) (info->stream, "%s", opcode->name);
 369
 370       format = opcode->format;
 371       if (format & (M6811_OP_MASK | M6811_OP_BITMASK
 372                     | M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16))
 373         {
 374           (*info->fprintf_func) (info->stream, "\t");
 375         }
 376
 377       /* The movb and movw must be handled in a special way...
 378          The source constant 'ii' is not always at the same place.
 379          This is the same for the destination for the post-indexed byte.
 380          The 'offset' is used to do the appropriate correction.
 381
 382                                    offset          offset
 383                               for constant     for destination
 384          movb   18 OB ii hh ll       0          0
 385                 18 08 xb ii          1          -1
 386                 18 0C hh ll hh ll    0          0
 387                 18 09 xb hh ll       1          -1
 388                 18 0D xb hh ll       0          0
 389                 18 0A xb xb          0          0
 390
 391          movw   18 03 jj kk hh ll    0          0
 392                 18 00 xb jj kk       1          -1
 393                 18 04 hh ll hh ll    0          0
 394                 18 01 xb hh ll       1          -1
 395                 18 05 xb hh ll       0          0
 396                 18 02 xb xb          0          0
 397
 398          After the source operand is read, the position 'pos' is incremented
 399          this explains the negative offset for destination.
 400
 401          movb/movw above are the only instructions with this matching
 402          format.  */
 403       offset = ((format & M6812_OP_IDX_P2)
 404                 && (format & (M6811_OP_IMM8 | M6811_OP_IMM16 |
 405                               M6811_OP_IND16)));
 406
 407       /* Operand with one more byte: - immediate, offset,
 408          direct-low address.  */
 409       if (format &
 410           (M6811_OP_IMM8 | M6811_OP_IX | M6811_OP_IY | M6811_OP_DIRECT))
 411         {
 412           status = read_memory (memaddr + pos + offset, &buffer[0], 1, info);
 413           if (status != 0)
 414             {
 415               return status;
 416             }
 417
 418           pos++;
 419
 420           /* This movb/movw is special (see above).  */
 421           offset = -offset;
 422
 423           if (format & M6811_OP_IMM8)
 424             {
 425               (*info->fprintf_func) (info->stream, "#%d", (int) buffer[0]);
 426               format &= ~M6811_OP_IMM8;
 427             }
 428           else if (format & M6811_OP_IX)
 429             {
 430               /* Offsets are in range 0..255, print them unsigned.  */
 431               (*info->fprintf_func) (info->stream, "%u,x", buffer[0] & 0x0FF);
 432               format &= ~M6811_OP_IX;
 433             }
 434           else if (format & M6811_OP_IY)
 435             {
 436               (*info->fprintf_func) (info->stream, "%u,y", buffer[0] & 0x0FF);
 437               format &= ~M6811_OP_IY;
 438             }
 439           else if (format & M6811_OP_DIRECT)
 440             {
 441               (*info->fprintf_func) (info->stream, "*");
 442               (*info->print_address_func) (buffer[0] & 0x0FF, info);
 443               format &= ~M6811_OP_DIRECT;
 444             }
 445         }
 446
 447 #define M6812_INDEXED_FLAGS (M6812_OP_IDX|M6812_OP_IDX_1|M6812_OP_IDX_2)
 448       /* Analyze the 68HC12 indexed byte.  */
 449       if (format & M6812_INDEXED_FLAGS)
 450         {
 451           int indirect;
 452
 453           status = print_indexed_operand (memaddr + pos, info, &indirect, 0);
 454           if (status < 0)
 455             {
 456               return status;
 457             }
 458           pos += status;
 459
 460           /* The indirect addressing mode of the call instruction does
 461              not need the page code.  */
 462           if ((format & M6812_OP_PAGE) && indirect)
 463             format &= ~M6812_OP_PAGE;
 464         }
 465
 466       /* 68HC12 dbcc/ibcc/tbcc operands.  */
 467       if ((format & M6812_OP_REG) && (format & M6811_OP_JUMP_REL))
 468         {
 469           status = read_memory (memaddr + pos, &buffer[0], 2, info);
 470           if (status != 0)
 471             {
 472               return status;
 473             }
 474           (*info->fprintf_func) (info->stream, "%s,",
 475                                  reg_src_table[buffer[0] & 0x07]);
 476           sval = buffer[1] & 0x0ff;
 477           if (buffer[0] & 0x10)
 478             sval |= 0xff00;
 479
 480           pos += 2;
 481           (*info->print_address_func) (memaddr + pos + sval, info);
 482           format &= ~(M6812_OP_REG | M6811_OP_JUMP_REL);
 483         }
 484       else if (format & (M6812_OP_REG | M6812_OP_REG_2))
 485         {
 486           status = read_memory (memaddr + pos, &buffer[0], 1, info);
 487           if (status != 0)
 488             {
 489               return status;
 490             }
 491
 492           pos++;
 493           (*info->fprintf_func) (info->stream, "%s,%s",
 494                                  reg_src_table[(buffer[0] >> 4) & 7],
 495                                  reg_dst_table[(buffer[0] & 7)]);
 496         }
 497
 498       /* M6811_OP_BITMASK and M6811_OP_JUMP_REL must be treated separately
 499          and in that order.  The brset/brclr insn have a bitmask and then
 500          a relative branch offset.  */
 501       if (format & M6811_OP_BITMASK)
 502         {
 503           status = read_memory (memaddr + pos, &buffer[0], 1, info);
 504           if (status != 0)
 505             {
 506               return status;
 507             }
 508           pos++;
 509           (*info->fprintf_func) (info->stream, " #$%02x%s",
 510                                  buffer[0] & 0x0FF,
 511                                  (format & M6811_OP_JUMP_REL ? " " : ""));
 512           format &= ~M6811_OP_BITMASK;
 513         }
 514       if (format & M6811_OP_JUMP_REL)
 515         {
 516           int val;
 517
 518           status = read_memory (memaddr + pos, &buffer[0], 1, info);
 519           if (status != 0)
 520             {
 521               return status;
 522             }
 523
 524           pos++;
 525           val = (buffer[0] & 0x80) ? buffer[0] | 0xFFFFFF00 : buffer[0];
 526           (*info->print_address_func) (memaddr + pos + val, info);
 527           format &= ~M6811_OP_JUMP_REL;
 528         }
 529       else if (format & M6812_OP_JUMP_REL16)
 530         {
 531           int val;
 532
 533           status = read_memory (memaddr + pos, &buffer[0], 2, info);
 534           if (status != 0)
 535             {
 536               return status;
 537             }
 538
 539           pos += 2;
 540           val = ((buffer[0] << 8) | (buffer[1] & 0x0FF));
 541           if (val & 0x8000)
 542             val |= 0xffff0000;
 543
 544           (*info->print_address_func) (memaddr + pos + val, info);
 545           format &= ~M6812_OP_JUMP_REL16;
 546         }
 547       if (format & (M6811_OP_IMM16 | M6811_OP_IND16))
 548         {
 549           int val;
 550           bfd_vma addr;
 551           unsigned page = 0;
 552
 553           status = read_memory (memaddr + pos + offset, &buffer[0], 2, info);
 554           if (status != 0)
 555             {
 556               return status;
 557             }
 558           if (format & M6812_OP_IDX_P2)
 559             offset = -2;
 560           else
 561             offset = 0;
 562           pos += 2;
 563
 564           val = ((buffer[0] << 8) | (buffer[1] & 0x0FF));
 565           val &= 0x0FFFF;
 566           addr = val;
 567           if (format & M6812_OP_PAGE)
 568             {
 569               status = read_memory (memaddr + pos + offset, buffer, 1, info);
 570               if (status != 0)
 571                 return status;
 572
 573               page = (unsigned) buffer[0];
 574               if (addr >= M68HC12_BANK_BASE && addr < 0x0c000)
 575                 addr = ((val - M68HC12_BANK_BASE)
 576                         | (page << M68HC12_BANK_SHIFT))
 577                    + M68HC12_BANK_VIRT;
 578             }
 579           else if ((arch & cpu6812)
 580                    && addr >= M68HC12_BANK_BASE && addr < 0x0c000)
 581              {
 582                 int cur_page;
 583                 bfd_vma vaddr;
 584
 585                 if (memaddr >= M68HC12_BANK_VIRT)
 586                    cur_page = ((memaddr - M68HC12_BANK_VIRT)
 587                                >> M68HC12_BANK_SHIFT);
 588                 else
 589                    cur_page = 0;
 590
 591                 vaddr = ((addr - M68HC12_BANK_BASE)
 592                          + (cur_page << M68HC12_BANK_SHIFT))
 593                    + M68HC12_BANK_VIRT;
 594                 if (!info->symbol_at_address_func (addr, info)
 595                     && info->symbol_at_address_func (vaddr, info))
 596                    addr = vaddr;
 597              }
 598           if (format & M6811_OP_IMM16)
 599             {
 600               format &= ~M6811_OP_IMM16;
 601               (*info->fprintf_func) (info->stream, "#");
 602             }
 603           else
 604             format &= ~M6811_OP_IND16;
 605
 606           (*info->print_address_func) (addr, info);
 607           if (format & M6812_OP_PAGE)
 608             {
 609               (* info->fprintf_func) (info->stream, " {");
 610               (* info->print_address_func) (val, info);
 611               (* info->fprintf_func) (info->stream, ", %d}", page);
 612               format &= ~M6812_OP_PAGE;
 613               pos += 1;
 614             }
 615         }
 616
 617       if (format & M6812_OP_IDX_P2)
 618         {
 619           (*info->fprintf_func) (info->stream, ", ");
 620           status = print_indexed_operand (memaddr + pos + offset, info, 0, 1);
 621           if (status < 0)
 622             return status;
 623           pos += status;
 624         }
 625
 626       if (format & M6812_OP_IND16_P2)
 627         {
 628           int val;
 629
 630           (*info->fprintf_func) (info->stream, ", ");
 631
 632           status = read_memory (memaddr + pos + offset, &buffer[0], 2, info);
 633           if (status != 0)
 634             {
 635               return status;
 636             }
 637           pos += 2;
 638
 639           val = ((buffer[0] << 8) | (buffer[1] & 0x0FF));
 640           val &= 0x0FFFF;
 641           (*info->print_address_func) (val, info);
 642         }
 643
 644       if (format & M6812_OP_PAGE)
 645         {
 646           int val;
 647
 648           status = read_memory (memaddr + pos + offset, &buffer[0], 1, info);
 649           if (status != 0)
 650             {
 651               return status;
 652             }
 653           pos += 1;
 654
 655           val = buffer[0] & 0x0ff;
 656           (*info->fprintf_func) (info->stream, ", %d", val);
 657         }
 658
 659 #ifdef DEBUG
 660       /* Consistency check.  'format' must be 0, so that we have handled
 661          all formats; and the computed size of the insn must match the
 662          opcode table content.  */
 663       if (format & ~(M6811_OP_PAGE4 | M6811_OP_PAGE3 | M6811_OP_PAGE2))
 664         {
 665           (*info->fprintf_func) (info->stream, "; Error, format: %x", format);
 666         }
 667       if (pos != opcode->size)
 668         {
 669           (*info->fprintf_func) (info->stream, "; Error, size: %d expect %d",
 670                                  pos, opcode->size);
 671         }
 672 #endif
 673       return pos;
 674     }
 675
 676   /* Opcode not recognized.  */
 677   if (format == M6811_OP_PAGE2 && arch & cpu6812
 678       && ((code >= 0x30 && code <= 0x39) || (code >= 0x40 && code <= 0xff)))
 679     (*info->fprintf_func) (info->stream, "trap\t#%d", code & 0x0ff);
 680
 681   else if (format == M6811_OP_PAGE2)
 682     (*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x",
 683                            M6811_OPCODE_PAGE2, code);
 684   else if (format == M6811_OP_PAGE3)
 685     (*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x",
 686                            M6811_OPCODE_PAGE3, code);
 687   else if (format == M6811_OP_PAGE4)
 688     (*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x",
 689                            M6811_OPCODE_PAGE4, code);
 690   else
 691     (*info->fprintf_func) (info->stream, ".byte\t0x%02x", code);
 692
 693   return pos;
 694 }
 695
 696 /* Disassemble one instruction at address 'memaddr'.  Returns the number
 697    of bytes used by that instruction.  */
 698 int
 699 print_insn_m68hc11 (memaddr, info)
 700      bfd_vma memaddr;
 701      struct disassemble_info *info;
 702 {
 703   return print_insn (memaddr, info, cpu6811);
 704 }
 705
 706 int
 707 print_insn_m68hc12 (memaddr, info)
 708      bfd_vma memaddr;
 709      struct disassemble_info *info;
 710 {
 711   return print_insn (memaddr, info, cpu6812);
 712 }