opcodes/m68hc11-dis.c

   1 /* m68hc11-dis.c -- Motorola 68HC11 & 68HC12 disassembly
   2    Copyright 1999, 2000, 2001, 2002, 2003 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 #define PC_REGNUM 3
  26
  27 static const char *const reg_name[] = {
  28   "X", "Y", "SP", "PC"
  29 };
  30
  31 static const char *const reg_src_table[] = {
  32   "A", "B", "CCR", "TMP3", "D", "X", "Y", "SP"
  33 };
  34
  35 static const char *const reg_dst_table[] = {
  36   "A", "B", "CCR", "TMP2", "D", "X", "Y", "SP"
  37 };
  38
  39 #define OP_PAGE_MASK (M6811_OP_PAGE2|M6811_OP_PAGE3|M6811_OP_PAGE4)
  40
  41 /* Prototypes for local functions.  */
  42 static int read_memory (bfd_vma, bfd_byte *, int, struct disassemble_info *);
  43 static int print_indexed_operand (bfd_vma, struct disassemble_info *,
  44                                   int*, int, int, bfd_vma);
  45 static int print_insn (bfd_vma, struct disassemble_info *, int);
  46
  47 static int
  48 read_memory (bfd_vma memaddr, bfd_byte* buffer, int size,
  49              struct disassemble_info* info)
  50 {
  51   int status;
  52
  53   /* Get first byte.  Only one at a time because we don't know the
  54      size of the insn.  */
  55   status = (*info->read_memory_func) (memaddr, buffer, size, info);
  56   if (status != 0)
  57     {
  58       (*info->memory_error_func) (status, memaddr, info);
  59       return -1;
  60     }
  61   return 0;
  62 }
  63
  64
  65 /* Read the 68HC12 indexed operand byte and print the corresponding mode.
  66    Returns the number of bytes read or -1 if failure.  */
  67 static int
  68 print_indexed_operand (bfd_vma memaddr, struct disassemble_info* info,
  69                        int* indirect, int mov_insn, int pc_offset,
  70                        bfd_vma endaddr)
  71 {
  72   bfd_byte buffer[4];
  73   int reg;
  74   int status;
  75   short sval;
  76   int pos = 1;
  77
  78   if (indirect)
  79     *indirect = 0;
  80
  81   status = read_memory (memaddr, &buffer[0], 1, info);
  82   if (status != 0)
  83     {
  84       return status;
  85     }
  86
  87   /* n,r with 5-bits signed constant.  */
  88   if ((buffer[0] & 0x20) == 0)
  89     {
  90       reg = (buffer[0] >> 6) & 3;
  91       sval = (buffer[0] & 0x1f);
  92       if (sval & 0x10)
  93         sval |= 0xfff0;
  94       /* 68HC12 requires an adjustment for movb/movw pc relative modes.  */
  95       if (reg == PC_REGNUM && info->mach == bfd_mach_m6812 && mov_insn)
  96         sval += pc_offset;
  97       (*info->fprintf_func) (info->stream, "%d,%s",
  98                              (int) sval, reg_name[reg]);
  99
 100       if (reg == PC_REGNUM)
 101         {
 102           (* info->fprintf_func) (info->stream, " {");
 103           (* info->print_address_func) (endaddr + sval, info);
 104           (* info->fprintf_func) (info->stream, "}");
 105         }
 106     }
 107
 108   /* Auto pre/post increment/decrement.  */
 109   else if ((buffer[0] & 0xc0) != 0xc0)
 110     {
 111       const char *mode;
 112
 113       reg = (buffer[0] >> 6) & 3;
 114       sval = (buffer[0] & 0x0f);
 115       if (sval & 0x8)
 116         {
 117           sval |= 0xfff0;
 118           sval = -sval;
 119           mode = "-";
 120         }
 121       else
 122         {
 123           sval = sval + 1;
 124           mode = "+";
 125         }
 126       (*info->fprintf_func) (info->stream, "%d,%s%s%s",
 127                              (int) sval,
 128                              (buffer[0] & 0x10 ? "" : mode),
 129                              reg_name[reg], (buffer[0] & 0x10 ? mode : ""));
 130     }
 131
 132   /* [n,r] 16-bits offset indexed indirect.  */
 133   else if ((buffer[0] & 0x07) == 3)
 134     {
 135       if (mov_insn)
 136         {
 137           (*info->fprintf_func) (info->stream, "<invalid op: 0x%x>",
 138                                  buffer[0] & 0x0ff);
 139           return 0;
 140         }
 141       reg = (buffer[0] >> 3) & 0x03;
 142       status = read_memory (memaddr + pos, &buffer[0], 2, info);
 143       if (status != 0)
 144         {
 145           return status;
 146         }
 147
 148       pos += 2;
 149       sval = ((buffer[0] << 8) | (buffer[1] & 0x0FF));
 150       (*info->fprintf_func) (info->stream, "[%u,%s]",
 151                              sval & 0x0ffff, reg_name[reg]);
 152       if (indirect)
 153         *indirect = 1;
 154     }
 155
 156   /* n,r with 9 and 16 bit signed constant.  */
 157   else if ((buffer[0] & 0x4) == 0)
 158     {
 159       if (mov_insn)
 160         {
 161           (*info->fprintf_func) (info->stream, "<invalid op: 0x%x>",
 162                                  buffer[0] & 0x0ff);
 163           return 0;
 164         }
 165       reg = (buffer[0] >> 3) & 0x03;
 166       status = read_memory (memaddr + pos,
 167                             &buffer[1], (buffer[0] & 0x2 ? 2 : 1), info);
 168       if (status != 0)
 169         {
 170           return status;
 171         }
 172       if (buffer[0] & 2)
 173         {
 174           sval = ((buffer[1] << 8) | (buffer[2] & 0x0FF));
 175           sval &= 0x0FFFF;
 176           pos += 2;
 177           endaddr += 2;
 178         }
 179       else
 180         {
 181           sval = buffer[1] & 0x00ff;
 182           if (buffer[0] & 0x01)
 183             sval |= 0xff00;
 184           pos++;
 185           endaddr++;
 186         }
 187       (*info->fprintf_func) (info->stream, "%d,%s",
 188                              (int) sval, reg_name[reg]);
 189       if (reg == PC_REGNUM)
 190         {
 191           (* info->fprintf_func) (info->stream, " {");
 192           (* info->print_address_func) (endaddr + sval, info);
 193           (* info->fprintf_func) (info->stream, "}");
 194         }
 195     }
 196   else
 197     {
 198       reg = (buffer[0] >> 3) & 0x03;
 199       switch (buffer[0] & 3)
 200         {
 201         case 0:
 202           (*info->fprintf_func) (info->stream, "A,%s", reg_name[reg]);
 203           break;
 204         case 1:
 205           (*info->fprintf_func) (info->stream, "B,%s", reg_name[reg]);
 206           break;
 207         case 2:
 208           (*info->fprintf_func) (info->stream, "D,%s", reg_name[reg]);
 209           break;
 210         case 3:
 211         default:
 212           (*info->fprintf_func) (info->stream, "[D,%s]", reg_name[reg]);
 213           if (indirect)
 214             *indirect = 1;
 215           break;
 216         }
 217     }
 218
 219   return pos;
 220 }
 221
 222 /* Disassemble one instruction at address 'memaddr'.  Returns the number
 223    of bytes used by that instruction.  */
 224 static int
 225 print_insn (bfd_vma memaddr, struct disassemble_info* info, int arch)
 226 {
 227   int status;
 228   bfd_byte buffer[4];
 229   unsigned char code;
 230   long format, pos, i;
 231   short sval;
 232   const struct m68hc11_opcode *opcode;
 233
 234   /* Get first byte.  Only one at a time because we don't know the
 235      size of the insn.  */
 236   status = read_memory (memaddr, buffer, 1, info);
 237   if (status != 0)
 238     {
 239       return status;
 240     }
 241
 242   format = 0;
 243   code = buffer[0];
 244   pos = 0;
 245
 246   /* Look for page2,3,4 opcodes.  */
 247   if (code == M6811_OPCODE_PAGE2)
 248     {
 249       pos++;
 250       format = M6811_OP_PAGE2;
 251     }
 252   else if (code == M6811_OPCODE_PAGE3 && arch == cpu6811)
 253     {
 254       pos++;
 255       format = M6811_OP_PAGE3;
 256     }
 257   else if (code == M6811_OPCODE_PAGE4 && arch == cpu6811)
 258     {
 259       pos++;
 260       format = M6811_OP_PAGE4;
 261     }
 262
 263   /* We are in page2,3,4; get the real opcode.  */
 264   if (pos == 1)
 265     {
 266       status = read_memory (memaddr + pos, &buffer[1], 1, info);
 267       if (status != 0)
 268         {
 269           return status;
 270         }
 271       code = buffer[1];
 272     }
 273
 274
 275   /* Look first for a 68HC12 alias.  All of them are 2-bytes long and
 276      in page 1.  There is no operand to print.  We read the second byte
 277      only when we have a possible match.  */
 278   if ((arch & cpu6812) && format == 0)
 279     {
 280       int must_read = 1;
 281
 282       /* Walk the alias table to find a code1+code2 match.  */
 283       for (i = 0; i < m68hc12_num_alias; i++)
 284         {
 285           if (m68hc12_alias[i].code1 == code)
 286             {
 287               if (must_read)
 288                 {
 289                   status = read_memory (memaddr + pos + 1,
 290                                         &buffer[1], 1, info);
 291                   if (status != 0)
 292                     break;
 293
 294                   must_read = 1;
 295                 }
 296               if (m68hc12_alias[i].code2 == (unsigned char) buffer[1])
 297                 {
 298                   (*info->fprintf_func) (info->stream, "%s",
 299                                          m68hc12_alias[i].name);
 300                   return 2;
 301                 }
 302             }
 303         }
 304     }
 305
 306   pos++;
 307
 308   /* Scan the opcode table until we find the opcode
 309      with the corresponding page.  */
 310   opcode = m68hc11_opcodes;
 311   for (i = 0; i < m68hc11_num_opcodes; i++, opcode++)
 312     {
 313       int offset;
 314       int pc_src_offset;
 315       int pc_dst_offset = 0;
 316
 317       if ((opcode->arch & arch) == 0)
 318         continue;
 319       if (opcode->opcode != code)
 320         continue;
 321       if ((opcode->format & OP_PAGE_MASK) != format)
 322         continue;
 323
 324       if (opcode->format & M6812_OP_REG)
 325         {
 326           int j;
 327           int is_jump;
 328
 329           if (opcode->format & M6811_OP_JUMP_REL)
 330             is_jump = 1;
 331           else
 332             is_jump = 0;
 333
 334           status = read_memory (memaddr + pos, &buffer[0], 1, info);
 335           if (status != 0)
 336             {
 337               return status;
 338             }
 339           for (j = 0; i + j < m68hc11_num_opcodes; j++)
 340             {
 341               if ((opcode[j].arch & arch) == 0)
 342                 continue;
 343               if (opcode[j].opcode != code)
 344                 continue;
 345               if (is_jump)
 346                 {
 347                   if (!(opcode[j].format & M6811_OP_JUMP_REL))
 348                     continue;
 349
 350                   if ((opcode[j].format & M6812_OP_IBCC_MARKER)
 351                       && (buffer[0] & 0xc0) != 0x80)
 352                     continue;
 353                   if ((opcode[j].format & M6812_OP_TBCC_MARKER)
 354                       && (buffer[0] & 0xc0) != 0x40)
 355                     continue;
 356                   if ((opcode[j].format & M6812_OP_DBCC_MARKER)
 357                       && (buffer[0] & 0xc0) != 0)
 358                     continue;
 359                   if ((opcode[j].format & M6812_OP_EQ_MARKER)
 360                       && (buffer[0] & 0x20) == 0)
 361                     break;
 362                   if (!(opcode[j].format & M6812_OP_EQ_MARKER)
 363                       && (buffer[0] & 0x20) != 0)
 364                     break;
 365                   continue;
 366                 }
 367               if (opcode[j].format & M6812_OP_EXG_MARKER && buffer[0] & 0x80)
 368                 break;
 369               if ((opcode[j].format & M6812_OP_SEX_MARKER)
 370                   && (((buffer[0] & 0x07) >= 3 && (buffer[0] & 7) <= 7))
 371                   && ((buffer[0] & 0x0f0) <= 0x20))
 372                 break;
 373               if (opcode[j].format & M6812_OP_TFR_MARKER
 374                   && !(buffer[0] & 0x80))
 375                 break;
 376             }
 377           if (i + j < m68hc11_num_opcodes)
 378             opcode = &opcode[j];
 379         }
 380
 381       /* We have found the opcode.  Extract the operand and print it.  */
 382       (*info->fprintf_func) (info->stream, "%s", opcode->name);
 383
 384       format = opcode->format;
 385       if (format & (M6811_OP_MASK | M6811_OP_BITMASK
 386                     | M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16))
 387         {
 388           (*info->fprintf_func) (info->stream, "\t");
 389         }
 390
 391       /* The movb and movw must be handled in a special way...
 392          The source constant 'ii' is not always at the same place.
 393          This is the same for the destination for the post-indexed byte.
 394          The 'offset' is used to do the appropriate correction.
 395
 396                                    offset          offset
 397                               for constant     for destination
 398          movb   18 OB ii hh ll       0          0
 399                 18 08 xb ii          1          -1
 400                 18 0C hh ll hh ll    0          0
 401                 18 09 xb hh ll       1          -1
 402                 18 0D xb hh ll       0          0
 403                 18 0A xb xb          0          0
 404
 405          movw   18 03 jj kk hh ll    0          0
 406                 18 00 xb jj kk       1          -1
 407                 18 04 hh ll hh ll    0          0
 408                 18 01 xb hh ll       1          -1
 409                 18 05 xb hh ll       0          0
 410                 18 02 xb xb          0          0
 411
 412          After the source operand is read, the position 'pos' is incremented
 413          this explains the negative offset for destination.
 414
 415          movb/movw above are the only instructions with this matching
 416          format.  */
 417       offset = ((format & M6812_OP_IDX_P2)
 418                 && (format & (M6811_OP_IMM8 | M6811_OP_IMM16 |
 419                               M6811_OP_IND16)));
 420
 421       /* Operand with one more byte: - immediate, offset,
 422          direct-low address.  */
 423       if (format &
 424           (M6811_OP_IMM8 | M6811_OP_IX | M6811_OP_IY | M6811_OP_DIRECT))
 425         {
 426           status = read_memory (memaddr + pos + offset, &buffer[0], 1, info);
 427           if (status != 0)
 428             {
 429               return status;
 430             }
 431
 432           pos++;
 433
 434           /* This movb/movw is special (see above).  */
 435           offset = -offset;
 436
 437           pc_dst_offset = 2;
 438           if (format & M6811_OP_IMM8)
 439             {
 440               (*info->fprintf_func) (info->stream, "#%d", (int) buffer[0]);
 441               format &= ~M6811_OP_IMM8;
 442               /* Set PC destination offset.  */
 443               pc_dst_offset = 1;
 444             }
 445           else if (format & M6811_OP_IX)
 446             {
 447               /* Offsets are in range 0..255, print them unsigned.  */
 448               (*info->fprintf_func) (info->stream, "%u,x", buffer[0] & 0x0FF);
 449               format &= ~M6811_OP_IX;
 450             }
 451           else if (format & M6811_OP_IY)
 452             {
 453               (*info->fprintf_func) (info->stream, "%u,y", buffer[0] & 0x0FF);
 454               format &= ~M6811_OP_IY;
 455             }
 456           else if (format & M6811_OP_DIRECT)
 457             {
 458               (*info->fprintf_func) (info->stream, "*");
 459               (*info->print_address_func) (buffer[0] & 0x0FF, info);
 460               format &= ~M6811_OP_DIRECT;
 461             }
 462         }
 463
 464 #define M6812_DST_MOVE  (M6812_OP_IND16_P2 | M6812_OP_IDX_P2)
 465 #define M6812_INDEXED_FLAGS (M6812_OP_IDX|M6812_OP_IDX_1|M6812_OP_IDX_2)
 466       /* Analyze the 68HC12 indexed byte.  */
 467       if (format & M6812_INDEXED_FLAGS)
 468         {
 469           int indirect;
 470           bfd_vma endaddr;
 471
 472           endaddr = memaddr + pos + 1;
 473           if (format & M6811_OP_IND16)
 474             endaddr += 2;
 475           pc_src_offset = -1;
 476           pc_dst_offset = 1;
 477           status = print_indexed_operand (memaddr + pos, info, &indirect,
 478                                           (format & M6812_DST_MOVE),
 479                                           pc_src_offset, endaddr);
 480           if (status < 0)
 481             {
 482               return status;
 483             }
 484           pos += status;
 485
 486           /* The indirect addressing mode of the call instruction does
 487              not need the page code.  */
 488           if ((format & M6812_OP_PAGE) && indirect)
 489             format &= ~M6812_OP_PAGE;
 490         }
 491
 492       /* 68HC12 dbcc/ibcc/tbcc operands.  */
 493       if ((format & M6812_OP_REG) && (format & M6811_OP_JUMP_REL))
 494         {
 495           status = read_memory (memaddr + pos, &buffer[0], 2, info);
 496           if (status != 0)
 497             {
 498               return status;
 499             }
 500           (*info->fprintf_func) (info->stream, "%s,",
 501                                  reg_src_table[buffer[0] & 0x07]);
 502           sval = buffer[1] & 0x0ff;
 503           if (buffer[0] & 0x10)
 504             sval |= 0xff00;
 505
 506           pos += 2;
 507           (*info->print_address_func) (memaddr + pos + sval, info);
 508           format &= ~(M6812_OP_REG | M6811_OP_JUMP_REL);
 509         }
 510       else if (format & (M6812_OP_REG | M6812_OP_REG_2))
 511         {
 512           status = read_memory (memaddr + pos, &buffer[0], 1, info);
 513           if (status != 0)
 514             {
 515               return status;
 516             }
 517
 518           pos++;
 519           (*info->fprintf_func) (info->stream, "%s,%s",
 520                                  reg_src_table[(buffer[0] >> 4) & 7],
 521                                  reg_dst_table[(buffer[0] & 7)]);
 522         }
 523
 524       if (format & (M6811_OP_IMM16 | M6811_OP_IND16))
 525         {
 526           int val;
 527           bfd_vma addr;
 528           unsigned page = 0;
 529
 530           status = read_memory (memaddr + pos + offset, &buffer[0], 2, info);
 531           if (status != 0)
 532             {
 533               return status;
 534             }
 535           if (format & M6812_OP_IDX_P2)
 536             offset = -2;
 537           else
 538             offset = 0;
 539           pos += 2;
 540
 541           val = ((buffer[0] << 8) | (buffer[1] & 0x0FF));
 542           val &= 0x0FFFF;
 543           addr = val;
 544           pc_dst_offset = 2;
 545           if (format & M6812_OP_PAGE)
 546             {
 547               status = read_memory (memaddr + pos + offset, buffer, 1, info);
 548               if (status != 0)
 549                 return status;
 550
 551               page = (unsigned) buffer[0];
 552               if (addr >= M68HC12_BANK_BASE && addr < 0x0c000)
 553                 addr = ((val - M68HC12_BANK_BASE)
 554                         | (page << M68HC12_BANK_SHIFT))
 555                    + M68HC12_BANK_VIRT;
 556             }
 557           else if ((arch & cpu6812)
 558                    && addr >= M68HC12_BANK_BASE && addr < 0x0c000)
 559              {
 560                 int cur_page;
 561                 bfd_vma vaddr;
 562
 563                 if (memaddr >= M68HC12_BANK_VIRT)
 564                    cur_page = ((memaddr - M68HC12_BANK_VIRT)
 565                                >> M68HC12_BANK_SHIFT);
 566                 else
 567                    cur_page = 0;
 568
 569                 vaddr = ((addr - M68HC12_BANK_BASE)
 570                          + (cur_page << M68HC12_BANK_SHIFT))
 571                    + M68HC12_BANK_VIRT;
 572                 if (!info->symbol_at_address_func (addr, info)
 573                     && info->symbol_at_address_func (vaddr, info))
 574                    addr = vaddr;
 575              }
 576           if (format & M6811_OP_IMM16)
 577             {
 578               format &= ~M6811_OP_IMM16;
 579               (*info->fprintf_func) (info->stream, "#");
 580             }
 581           else
 582             format &= ~M6811_OP_IND16;
 583
 584           (*info->print_address_func) (addr, info);
 585           if (format & M6812_OP_PAGE)
 586             {
 587               (* info->fprintf_func) (info->stream, " {");
 588               (* info->print_address_func) (val, info);
 589               (* info->fprintf_func) (info->stream, ", %d}", page);
 590               format &= ~M6812_OP_PAGE;
 591               pos += 1;
 592             }
 593         }
 594
 595       if (format & M6812_OP_IDX_P2)
 596         {
 597           (*info->fprintf_func) (info->stream, ", ");
 598           status = print_indexed_operand (memaddr + pos + offset, info,
 599                                           0, 1, pc_dst_offset,
 600                                           memaddr + pos + offset + 1);
 601           if (status < 0)
 602             return status;
 603           pos += status;
 604         }
 605
 606       if (format & M6812_OP_IND16_P2)
 607         {
 608           int val;
 609
 610           (*info->fprintf_func) (info->stream, ", ");
 611
 612           status = read_memory (memaddr + pos + offset, &buffer[0], 2, info);
 613           if (status != 0)
 614             {
 615               return status;
 616             }
 617           pos += 2;
 618
 619           val = ((buffer[0] << 8) | (buffer[1] & 0x0FF));
 620           val &= 0x0FFFF;
 621           (*info->print_address_func) (val, info);
 622         }
 623
 624       /* M6811_OP_BITMASK and M6811_OP_JUMP_REL must be treated separately
 625          and in that order.  The brset/brclr insn have a bitmask and then
 626          a relative branch offset.  */
 627       if (format & M6811_OP_BITMASK)
 628         {
 629           status = read_memory (memaddr + pos, &buffer[0], 1, info);
 630           if (status != 0)
 631             {
 632               return status;
 633             }
 634           pos++;
 635           (*info->fprintf_func) (info->stream, " #$%02x%s",
 636                                  buffer[0] & 0x0FF,
 637                                  (format & M6811_OP_JUMP_REL ? " " : ""));
 638           format &= ~M6811_OP_BITMASK;
 639         }
 640       if (format & M6811_OP_JUMP_REL)
 641         {
 642           int val;
 643
 644           status = read_memory (memaddr + pos, &buffer[0], 1, info);
 645           if (status != 0)
 646             {
 647               return status;
 648             }
 649
 650           pos++;
 651           val = (buffer[0] & 0x80) ? buffer[0] | 0xFFFFFF00 : buffer[0];
 652           (*info->print_address_func) (memaddr + pos + val, info);
 653           format &= ~M6811_OP_JUMP_REL;
 654         }
 655       else if (format & M6812_OP_JUMP_REL16)
 656         {
 657           int val;
 658
 659           status = read_memory (memaddr + pos, &buffer[0], 2, info);
 660           if (status != 0)
 661             {
 662               return status;
 663             }
 664
 665           pos += 2;
 666           val = ((buffer[0] << 8) | (buffer[1] & 0x0FF));
 667           if (val & 0x8000)
 668             val |= 0xffff0000;
 669
 670           (*info->print_address_func) (memaddr + pos + val, info);
 671           format &= ~M6812_OP_JUMP_REL16;
 672         }
 673
 674       if (format & M6812_OP_PAGE)
 675         {
 676           int val;
 677
 678           status = read_memory (memaddr + pos + offset, &buffer[0], 1, info);
 679           if (status != 0)
 680             {
 681               return status;
 682             }
 683           pos += 1;
 684
 685           val = buffer[0] & 0x0ff;
 686           (*info->fprintf_func) (info->stream, ", %d", val);
 687         }
 688
 689 #ifdef DEBUG
 690       /* Consistency check.  'format' must be 0, so that we have handled
 691          all formats; and the computed size of the insn must match the
 692          opcode table content.  */
 693       if (format & ~(M6811_OP_PAGE4 | M6811_OP_PAGE3 | M6811_OP_PAGE2))
 694         {
 695           (*info->fprintf_func) (info->stream, "; Error, format: %x", format);
 696         }
 697       if (pos != opcode->size)
 698         {
 699           (*info->fprintf_func) (info->stream, "; Error, size: %d expect %d",
 700                                  pos, opcode->size);
 701         }
 702 #endif
 703       return pos;
 704     }
 705
 706   /* Opcode not recognized.  */
 707   if (format == M6811_OP_PAGE2 && arch & cpu6812
 708       && ((code >= 0x30 && code <= 0x39) || (code >= 0x40)))
 709     (*info->fprintf_func) (info->stream, "trap\t#%d", code & 0x0ff);
 710
 711   else if (format == M6811_OP_PAGE2)
 712     (*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x",
 713                            M6811_OPCODE_PAGE2, code);
 714   else if (format == M6811_OP_PAGE3)
 715     (*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x",
 716                            M6811_OPCODE_PAGE3, code);
 717   else if (format == M6811_OP_PAGE4)
 718     (*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x",
 719                            M6811_OPCODE_PAGE4, code);
 720   else
 721     (*info->fprintf_func) (info->stream, ".byte\t0x%02x", code);
 722
 723   return pos;
 724 }
 725
 726 /* Disassemble one instruction at address 'memaddr'.  Returns the number
 727    of bytes used by that instruction.  */
 728 int
 729 print_insn_m68hc11 (bfd_vma memaddr, struct disassemble_info* info)
 730 {
 731   return print_insn (memaddr, info, cpu6811);
 732 }
 733
 734 int
 735 print_insn_m68hc12 (bfd_vma memaddr, struct disassemble_info* info)
 736 {
 737   return print_insn (memaddr, info, cpu6812);
 738 }