opcodes/m68k-dis.c

   1 /* Print Motorola 68k instructions.
   2    Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
   3    1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
   4    Free Software Foundation, Inc.
   5
   6    This file is part of the GNU opcodes library.
   7
   8    This library is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3, or (at your option)
  11    any later version.
  12
  13    It is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #include "sysdep.h"
  24 #include "dis-asm.h"
  25 #include "floatformat.h"
  26 #include "libiberty.h"
  27 #include "opintl.h"
  28
  29 #include "opcode/m68k.h"
  30
  31 /* Local function prototypes.  */
  32
  33 const char * const fpcr_names[] =
  34 {
  35   "", "%fpiar", "%fpsr", "%fpiar/%fpsr", "%fpcr",
  36   "%fpiar/%fpcr", "%fpsr/%fpcr", "%fpiar/%fpsr/%fpcr"
  37 };
  38
  39 static char *const reg_names[] =
  40 {
  41   "%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
  42   "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%fp", "%sp",
  43   "%ps", "%pc"
  44 };
  45
  46 /* Name of register halves for MAC/EMAC.
  47    Seperate from reg_names since 'spu', 'fpl' look weird.  */
  48 static char *const reg_half_names[] =
  49 {
  50   "%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
  51   "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%a7",
  52   "%ps", "%pc"
  53 };
  54
  55 /* Sign-extend an (unsigned char).  */
  56 #if __STDC__ == 1
  57 #define COERCE_SIGNED_CHAR(ch) ((signed char) (ch))
  58 #else
  59 #define COERCE_SIGNED_CHAR(ch) ((int) (((ch) ^ 0x80) & 0xFF) - 128)
  60 #endif
  61
  62 /* Get a 1 byte signed integer.  */
  63 #define NEXTBYTE(p, val)                        \
  64   do                                            \
  65     {                                           \
  66       p += 2;                                   \
  67       if (!FETCH_DATA (info, p))                \
  68         return -3;                              \
  69       val = COERCE_SIGNED_CHAR (p[-1]);         \
  70     }                                           \
  71   while (0)
  72
  73 /* Get a 2 byte signed integer.  */
  74 #define COERCE16(x) ((int) (((x) ^ 0x8000) - 0x8000))
  75
  76 #define NEXTWORD(p, val, ret_val)               \
  77   do                                            \
  78     {                                           \
  79       p += 2;                                   \
  80       if (!FETCH_DATA (info, p))                \
  81         return ret_val;                         \
  82       val = COERCE16 ((p[-2] << 8) + p[-1]);    \
  83     }                                           \
  84   while (0)
  85
  86 /* Get a 4 byte signed integer.  */
  87 #define COERCE32(x) ((bfd_signed_vma) ((x) ^ 0x80000000) - 0x80000000)
  88
  89 #define NEXTLONG(p, val, ret_val)                                       \
  90   do                                                                    \
  91     {                                                                   \
  92       p += 4;                                                           \
  93       if (!FETCH_DATA (info, p))                                        \
  94         return ret_val;                                                 \
  95       val = COERCE32 ((((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1]); \
  96     }                                                                   \
  97   while (0)
  98
  99 /* Get a 4 byte unsigned integer.  */
 100 #define NEXTULONG(p, val)                                               \
 101   do                                                                    \
 102     {                                                                   \
 103       p += 4;                                                           \
 104       if (!FETCH_DATA (info, p))                                        \
 105         return -3;                                                      \
 106       val = (unsigned int) ((((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1]); \
 107     }                                                                   \
 108   while (0)
 109
 110 /* Get a single precision float.  */
 111 #define NEXTSINGLE(val, p)                                      \
 112   do                                                            \
 113     {                                                           \
 114       p += 4;                                                   \
 115       if (!FETCH_DATA (info, p))                                \
 116         return -3;                                              \
 117       floatformat_to_double (& floatformat_ieee_single_big,     \
 118                              (char *) p - 4, & val);            \
 119     }                                                           \
 120   while (0)
 121
 122 /* Get a double precision float.  */
 123 #define NEXTDOUBLE(val, p)                                      \
 124   do                                                            \
 125     {                                                           \
 126       p += 8;                                                   \
 127       if (!FETCH_DATA (info, p))                                \
 128         return -3;                                              \
 129       floatformat_to_double (& floatformat_ieee_double_big,     \
 130                              (char *) p - 8, & val);            \
 131     }                                                           \
 132   while (0)
 133
 134 /* Get an extended precision float.  */
 135 #define NEXTEXTEND(val, p)                              \
 136   do                                                    \
 137     {                                                   \
 138       p += 12;                                          \
 139       if (!FETCH_DATA (info, p))                        \
 140         return -3;                                      \
 141       floatformat_to_double (& floatformat_m68881_ext,  \
 142                              (char *) p - 12, & val);   \
 143     }                                                   \
 144   while (0)
 145
 146 /* Need a function to convert from packed to double
 147    precision.   Actually, it's easier to print a
 148    packed number than a double anyway, so maybe
 149    there should be a special case to handle this... */
 150 #define NEXTPACKED(p, val)                      \
 151   do                                            \
 152     {                                           \
 153       p += 12;                                  \
 154       if (!FETCH_DATA (info, p))                \
 155         return -3;                              \
 156       val = 0.0;                                \
 157     }                                           \
 158   while (0)
 159
 160 \f
 161 /* Maximum length of an instruction.  */
 162 #define MAXLEN 22
 163
 164 #include <setjmp.h>
 165
 166 struct private
 167 {
 168   /* Points to first byte not fetched.  */
 169   bfd_byte *max_fetched;
 170   bfd_byte the_buffer[MAXLEN];
 171   bfd_vma insn_start;
 172 };
 173
 174 /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
 175    to ADDR (exclusive) are valid.  Returns 1 for success, 0 on error.  */
 176 #define FETCH_DATA(info, addr) \
 177   ((addr) <= ((struct private *) (info->private_data))->max_fetched \
 178    ? 1 : fetch_data ((info), (addr)))
 179
 180 static int
 181 fetch_data (struct disassemble_info *info, bfd_byte *addr)
 182 {
 183   int status;
 184   struct private *priv = (struct private *)info->private_data;
 185   bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer);
 186
 187   status = (*info->read_memory_func) (start,
 188                                       priv->max_fetched,
 189                                       addr - priv->max_fetched,
 190                                       info);
 191   if (status != 0)
 192     {
 193       (*info->memory_error_func) (status, start, info);
 194       return 0;
 195     }
 196   else
 197     priv->max_fetched = addr;
 198   return 1;
 199 }
 200 \f
 201 /* This function is used to print to the bit-bucket.  */
 202 static int
 203 dummy_printer (FILE *file ATTRIBUTE_UNUSED,
 204                const char *format ATTRIBUTE_UNUSED,
 205                ...)
 206 {
 207   return 0;
 208 }
 209
 210 static void
 211 dummy_print_address (bfd_vma vma ATTRIBUTE_UNUSED,
 212                      struct disassemble_info *info ATTRIBUTE_UNUSED)
 213 {
 214 }
 215
 216 /* Fetch BITS bits from a position in the instruction specified by CODE.
 217    CODE is a "place to put an argument", or 'x' for a destination
 218    that is a general address (mode and register).
 219    BUFFER contains the instruction.
 220    Returns -1 on failure.  */
 221
 222 static int
 223 fetch_arg (unsigned char *buffer,
 224            int code,
 225            int bits,
 226            disassemble_info *info)
 227 {
 228   int val = 0;
 229
 230   switch (code)
 231     {
 232     case '/': /* MAC/EMAC mask bit.  */
 233       val = buffer[3] >> 5;
 234       break;
 235
 236     case 'G': /* EMAC ACC load.  */
 237       val = ((buffer[3] >> 3) & 0x2) | ((~buffer[1] >> 7) & 0x1);
 238       break;
 239
 240     case 'H': /* EMAC ACC !load.  */
 241       val = ((buffer[3] >> 3) & 0x2) | ((buffer[1] >> 7) & 0x1);
 242       break;
 243
 244     case ']': /* EMAC ACCEXT bit.  */
 245       val = buffer[0] >> 2;
 246       break;
 247
 248     case 'I': /* MAC/EMAC scale factor.  */
 249       val = buffer[2] >> 1;
 250       break;
 251
 252     case 'F': /* EMAC ACCx.  */
 253       val = buffer[0] >> 1;
 254       break;
 255
 256     case 'f':
 257       val = buffer[1];
 258       break;
 259
 260     case 's':
 261       val = buffer[1];
 262       break;
 263
 264     case 'd':                   /* Destination, for register or quick.  */
 265       val = (buffer[0] << 8) + buffer[1];
 266       val >>= 9;
 267       break;
 268
 269     case 'x':                   /* Destination, for general arg.  */
 270       val = (buffer[0] << 8) + buffer[1];
 271       val >>= 6;
 272       break;
 273
 274     case 'k':
 275       if (! FETCH_DATA (info, buffer + 3))
 276         return -1;
 277       val = (buffer[3] >> 4);
 278       break;
 279
 280     case 'C':
 281       if (! FETCH_DATA (info, buffer + 3))
 282         return -1;
 283       val = buffer[3];
 284       break;
 285
 286     case '1':
 287       if (! FETCH_DATA (info, buffer + 3))
 288         return -1;
 289       val = (buffer[2] << 8) + buffer[3];
 290       val >>= 12;
 291       break;
 292
 293     case '2':
 294       if (! FETCH_DATA (info, buffer + 3))
 295         return -1;
 296       val = (buffer[2] << 8) + buffer[3];
 297       val >>= 6;
 298       break;
 299
 300     case '3':
 301     case 'j':
 302       if (! FETCH_DATA (info, buffer + 3))
 303         return -1;
 304       val = (buffer[2] << 8) + buffer[3];
 305       break;
 306
 307     case '4':
 308       if (! FETCH_DATA (info, buffer + 5))
 309         return -1;
 310       val = (buffer[4] << 8) + buffer[5];
 311       val >>= 12;
 312       break;
 313
 314     case '5':
 315       if (! FETCH_DATA (info, buffer + 5))
 316         return -1;
 317       val = (buffer[4] << 8) + buffer[5];
 318       val >>= 6;
 319       break;
 320
 321     case '6':
 322       if (! FETCH_DATA (info, buffer + 5))
 323         return -1;
 324       val = (buffer[4] << 8) + buffer[5];
 325       break;
 326
 327     case '7':
 328       if (! FETCH_DATA (info, buffer + 3))
 329         return -1;
 330       val = (buffer[2] << 8) + buffer[3];
 331       val >>= 7;
 332       break;
 333
 334     case '8':
 335       if (! FETCH_DATA (info, buffer + 3))
 336         return -1;
 337       val = (buffer[2] << 8) + buffer[3];
 338       val >>= 10;
 339       break;
 340
 341     case '9':
 342       if (! FETCH_DATA (info, buffer + 3))
 343         return -1;
 344       val = (buffer[2] << 8) + buffer[3];
 345       val >>= 5;
 346       break;
 347
 348     case 'e':
 349       val = (buffer[1] >> 6);
 350       break;
 351
 352     case 'E':
 353       if (! FETCH_DATA (info, buffer + 3))
 354         return -1;
 355       val = (buffer[2] >> 1);
 356       break;
 357
 358     case 'm':
 359       val = (buffer[1] & 0x40 ? 0x8 : 0)
 360         | ((buffer[0] >> 1) & 0x7)
 361         | (buffer[3] & 0x80 ? 0x10 : 0);
 362       break;
 363
 364     case 'n':
 365       val = (buffer[1] & 0x40 ? 0x8 : 0) | ((buffer[0] >> 1) & 0x7);
 366       break;
 367
 368     case 'o':
 369       val = (buffer[2] >> 4) | (buffer[3] & 0x80 ? 0x10 : 0);
 370       break;
 371
 372     case 'M':
 373       val = (buffer[1] & 0xf) | (buffer[3] & 0x40 ? 0x10 : 0);
 374       break;
 375
 376     case 'N':
 377       val = (buffer[3] & 0xf) | (buffer[3] & 0x40 ? 0x10 : 0);
 378       break;
 379
 380     case 'h':
 381       val = buffer[2] >> 2;
 382       break;
 383
 384     default:
 385       abort ();
 386     }
 387
 388   /* bits is never too big.  */
 389   return val & ((1 << bits) - 1);
 390 }
 391
 392 /* Check if an EA is valid for a particular code.  This is required
 393    for the EMAC instructions since the type of source address determines
 394    if it is a EMAC-load instruciton if the EA is mode 2-5, otherwise it
 395    is a non-load EMAC instruction and the bits mean register Ry.
 396    A similar case exists for the movem instructions where the register
 397    mask is interpreted differently for different EAs.  */
 398
 399 static bfd_boolean
 400 m68k_valid_ea (char code, int val)
 401 {
 402   int mode, mask;
 403 #define M(n0,n1,n2,n3,n4,n5,n6,n70,n71,n72,n73,n74) \
 404   (n0 | n1 << 1 | n2 << 2 | n3 << 3 | n4 << 4 | n5 << 5 | n6 << 6 \
 405    | n70 << 7 | n71 << 8 | n72 << 9 | n73 << 10 | n74 << 11)
 406
 407   switch (code)
 408     {
 409     case '*':
 410       mask = M (1,1,1,1,1,1,1,1,1,1,1,1);
 411       break;
 412     case '~':
 413       mask = M (0,0,1,1,1,1,1,1,1,0,0,0);
 414       break;
 415     case '%':
 416       mask = M (1,1,1,1,1,1,1,1,1,0,0,0);
 417       break;
 418     case ';':
 419       mask = M (1,0,1,1,1,1,1,1,1,1,1,1);
 420       break;
 421     case '@':
 422       mask = M (1,0,1,1,1,1,1,1,1,1,1,0);
 423       break;
 424     case '!':
 425       mask = M (0,0,1,0,0,1,1,1,1,1,1,0);
 426       break;
 427     case '&':
 428       mask = M (0,0,1,0,0,1,1,1,1,0,0,0);
 429       break;
 430     case '$':
 431       mask = M (1,0,1,1,1,1,1,1,1,0,0,0);
 432       break;
 433     case '?':
 434       mask = M (1,0,1,0,0,1,1,1,1,0,0,0);
 435       break;
 436     case '/':
 437       mask = M (1,0,1,0,0,1,1,1,1,1,1,0);
 438       break;
 439     case '|':
 440       mask = M (0,0,1,0,0,1,1,1,1,1,1,0);
 441       break;
 442     case '>':
 443       mask = M (0,0,1,0,1,1,1,1,1,0,0,0);
 444       break;
 445     case '<':
 446       mask = M (0,0,1,1,0,1,1,1,1,1,1,0);
 447       break;
 448     case 'm':
 449       mask = M (1,1,1,1,1,0,0,0,0,0,0,0);
 450       break;
 451     case 'n':
 452       mask = M (0,0,0,0,0,1,0,0,0,1,0,0);
 453       break;
 454     case 'o':
 455       mask = M (0,0,0,0,0,0,1,1,1,0,1,1);
 456       break;
 457     case 'p':
 458       mask = M (1,1,1,1,1,1,0,0,0,0,0,0);
 459       break;
 460     case 'q':
 461       mask = M (1,0,1,1,1,1,0,0,0,0,0,0);
 462       break;
 463     case 'v':
 464       mask = M (1,0,1,1,1,1,0,1,1,0,0,0);
 465       break;
 466     case 'b':
 467       mask = M (1,0,1,1,1,1,0,0,0,1,0,0);
 468       break;
 469     case 'w':
 470       mask = M (0,0,1,1,1,1,0,0,0,1,0,0);
 471       break;
 472     case 'y':
 473       mask = M (0,0,1,0,0,1,0,0,0,0,0,0);
 474       break;
 475     case 'z':
 476       mask = M (0,0,1,0,0,1,0,0,0,1,0,0);
 477       break;
 478     case '4':
 479       mask = M (0,0,1,1,1,1,0,0,0,0,0,0);
 480       break;
 481     default:
 482       abort ();
 483     }
 484 #undef M
 485
 486   mode = (val >> 3) & 7;
 487   if (mode == 7)
 488     mode += val & 7;
 489   return (mask & (1 << mode)) != 0;
 490 }
 491
 492 /* Print a base register REGNO and displacement DISP, on INFO->STREAM.
 493    REGNO = -1 for pc, -2 for none (suppressed).  */
 494
 495 static void
 496 print_base (int regno, bfd_vma disp, disassemble_info *info)
 497 {
 498   if (regno == -1)
 499     {
 500       (*info->fprintf_func) (info->stream, "%%pc@(");
 501       (*info->print_address_func) (disp, info);
 502     }
 503   else
 504     {
 505       char buf[50];
 506
 507       if (regno == -2)
 508         (*info->fprintf_func) (info->stream, "@(");
 509       else if (regno == -3)
 510         (*info->fprintf_func) (info->stream, "%%zpc@(");
 511       else
 512         (*info->fprintf_func) (info->stream, "%s@(", reg_names[regno]);
 513
 514       sprintf_vma (buf, disp);
 515       (*info->fprintf_func) (info->stream, "%s", buf);
 516     }
 517 }
 518
 519 /* Print an indexed argument.  The base register is BASEREG (-1 for pc).
 520    P points to extension word, in buffer.
 521    ADDR is the nominal core address of that extension word.
 522    Returns NULL upon error.  */
 523
 524 static unsigned char *
 525 print_indexed (int basereg,
 526                unsigned char *p,
 527                bfd_vma addr,
 528                disassemble_info *info)
 529 {
 530   int word;
 531   static char *const scales[] = { "", ":2", ":4", ":8" };
 532   bfd_vma base_disp;
 533   bfd_vma outer_disp;
 534   char buf[40];
 535   char vmabuf[50];
 536
 537   NEXTWORD (p, word, NULL);
 538
 539   /* Generate the text for the index register.
 540      Where this will be output is not yet determined.  */
 541   sprintf (buf, "%s:%c%s",
 542            reg_names[(word >> 12) & 0xf],
 543            (word & 0x800) ? 'l' : 'w',
 544            scales[(word >> 9) & 3]);
 545
 546   /* Handle the 68000 style of indexing.  */
 547
 548   if ((word & 0x100) == 0)
 549     {
 550       base_disp = word & 0xff;
 551       if ((base_disp & 0x80) != 0)
 552         base_disp -= 0x100;
 553       if (basereg == -1)
 554         base_disp += addr;
 555       print_base (basereg, base_disp, info);
 556       (*info->fprintf_func) (info->stream, ",%s)", buf);
 557       return p;
 558     }
 559
 560   /* Handle the generalized kind.  */
 561   /* First, compute the displacement to add to the base register.  */
 562   if (word & 0200)
 563     {
 564       if (basereg == -1)
 565         basereg = -3;
 566       else
 567         basereg = -2;
 568     }
 569   if (word & 0100)
 570     buf[0] = '\0';
 571   base_disp = 0;
 572   switch ((word >> 4) & 3)
 573     {
 574     case 2:
 575       NEXTWORD (p, base_disp, NULL);
 576       break;
 577     case 3:
 578       NEXTLONG (p, base_disp, NULL);
 579     }
 580   if (basereg == -1)
 581     base_disp += addr;
 582
 583   /* Handle single-level case (not indirect).  */
 584   if ((word & 7) == 0)
 585     {
 586       print_base (basereg, base_disp, info);
 587       if (buf[0] != '\0')
 588         (*info->fprintf_func) (info->stream, ",%s", buf);
 589       (*info->fprintf_func) (info->stream, ")");
 590       return p;
 591     }
 592
 593   /* Two level.  Compute displacement to add after indirection.  */
 594   outer_disp = 0;
 595   switch (word & 3)
 596     {
 597     case 2:
 598       NEXTWORD (p, outer_disp, NULL);
 599       break;
 600     case 3:
 601       NEXTLONG (p, outer_disp, NULL);
 602     }
 603
 604   print_base (basereg, base_disp, info);
 605   if ((word & 4) == 0 && buf[0] != '\0')
 606     {
 607       (*info->fprintf_func) (info->stream, ",%s", buf);
 608       buf[0] = '\0';
 609     }
 610   sprintf_vma (vmabuf, outer_disp);
 611   (*info->fprintf_func) (info->stream, ")@(%s", vmabuf);
 612   if (buf[0] != '\0')
 613     (*info->fprintf_func) (info->stream, ",%s", buf);
 614   (*info->fprintf_func) (info->stream, ")");
 615
 616   return p;
 617 }
 618
 619 #define FETCH_ARG(size, val)                            \
 620   do                                                    \
 621     {                                                   \
 622       val = fetch_arg (buffer, place, size, info);      \
 623       if (val < 0)                                      \
 624         return -3;                                      \
 625     }                                                   \
 626   while (0)
 627
 628 /* Returns number of bytes "eaten" by the operand, or
 629    return -1 if an invalid operand was found, or -2 if
 630    an opcode tabe error was found or -3 to simply abort.
 631    ADDR is the pc for this arg to be relative to.  */
 632
 633 static int
 634 print_insn_arg (const char *d,
 635                 unsigned char *buffer,
 636                 unsigned char *p0,
 637                 bfd_vma addr,
 638                 disassemble_info *info)
 639 {
 640   int val = 0;
 641   int place = d[1];
 642   unsigned char *p = p0;
 643   int regno;
 644   const char *regname;
 645   unsigned char *p1;
 646   double flval;
 647   int flt_p;
 648   bfd_signed_vma disp;
 649   unsigned int uval;
 650
 651   switch (*d)
 652     {
 653     case 'c':           /* Cache identifier.  */
 654       {
 655         static char *const cacheFieldName[] = { "nc", "dc", "ic", "bc" };
 656         FETCH_ARG (2, val);
 657         (*info->fprintf_func) (info->stream, cacheFieldName[val]);
 658         break;
 659       }
 660
 661     case 'a':           /* Address register indirect only. Cf. case '+'.  */
 662       {
 663         FETCH_ARG (3, val);
 664         (*info->fprintf_func) (info->stream, "%s@", reg_names[val + 8]);
 665         break;
 666       }
 667
 668     case '_':           /* 32-bit absolute address for move16.  */
 669       {
 670         NEXTULONG (p, uval);
 671         (*info->print_address_func) (uval, info);
 672         break;
 673       }
 674
 675     case 'C':
 676       (*info->fprintf_func) (info->stream, "%%ccr");
 677       break;
 678
 679     case 'S':
 680       (*info->fprintf_func) (info->stream, "%%sr");
 681       break;
 682
 683     case 'U':
 684       (*info->fprintf_func) (info->stream, "%%usp");
 685       break;
 686
 687     case 'E':
 688       (*info->fprintf_func) (info->stream, "%%acc");
 689       break;
 690
 691     case 'G':
 692       (*info->fprintf_func) (info->stream, "%%macsr");
 693       break;
 694
 695     case 'H':
 696       (*info->fprintf_func) (info->stream, "%%mask");
 697       break;
 698
 699     case 'J':
 700       {
 701         /* FIXME: There's a problem here, different m68k processors call the
 702            same address different names.  The tables below try to get it right
 703            using info->mach, but only for v4e.  */
 704         struct regname { char * name; int value; };
 705         static const struct regname names[] =
 706           {
 707             {"%sfc", 0x000}, {"%dfc", 0x001}, {"%cacr", 0x002},
 708             {"%tc",  0x003}, {"%itt0",0x004}, {"%itt1", 0x005},
 709             {"%dtt0",0x006}, {"%dtt1",0x007}, {"%buscr",0x008},
 710             {"%usp", 0x800}, {"%vbr", 0x801}, {"%caar", 0x802},
 711             {"%msp", 0x803}, {"%isp", 0x804},
 712             {"%pc", 0x80f},
 713             /* Reg c04 is sometimes called flashbar or rambar.
 714                Rec c05 is also sometimes called rambar.  */
 715             {"%rambar0", 0xc04}, {"%rambar1", 0xc05},
 716
 717             {"%mbar", 0xc0f},
 718
 719             /* Should we be calling this psr like we do in case 'Y'?  */
 720             {"%mmusr",0x805},
 721
 722             {"%urp", 0x806}, {"%srp", 0x807}, {"%pcr", 0x808},
 723
 724             /* Fido added these.  */
 725             {"%cac", 0xffe}, {"%mbo", 0xfff}
 726         };
 727         /* Alternate names for v4e (MCF5407/5445x/MCF547x/MCF548x), at least.  */
 728         static const struct regname names_v4e[] =
 729           {
 730             {"%asid",0x003}, {"%acr0",0x004}, {"%acr1",0x005},
 731             {"%acr2",0x006}, {"%acr3",0x007}, {"%mmubar",0x008},
 732           };
 733         unsigned int arch_mask;
 734
 735         arch_mask = bfd_m68k_mach_to_features (info->mach);
 736         FETCH_ARG (12, val);
 737         if (arch_mask & (mcfisa_b | mcfisa_c))
 738           {
 739             for (regno = ARRAY_SIZE (names_v4e); --regno >= 0;)
 740               if (names_v4e[regno].value == val)
 741                 {
 742                   (*info->fprintf_func) (info->stream, "%s", names_v4e[regno].name);
 743                   break;
 744                 }
 745             if (regno >= 0)
 746               break;
 747           }
 748         for (regno = ARRAY_SIZE (names) - 1; regno >= 0; regno--)
 749           if (names[regno].value == val)
 750             {
 751               (*info->fprintf_func) (info->stream, "%s", names[regno].name);
 752               break;
 753             }
 754         if (regno < 0)
 755           (*info->fprintf_func) (info->stream, "0x%x", val);
 756       }
 757       break;
 758
 759     case 'Q':
 760       FETCH_ARG (3, val);
 761       /* 0 means 8, except for the bkpt instruction... */
 762       if (val == 0 && d[1] != 's')
 763         val = 8;
 764       (*info->fprintf_func) (info->stream, "#%d", val);
 765       break;
 766
 767     case 'x':
 768       FETCH_ARG (3, val);
 769       /* 0 means -1.  */
 770       if (val == 0)
 771         val = -1;
 772       (*info->fprintf_func) (info->stream, "#%d", val);
 773       break;
 774
 775     case 'j':
 776       FETCH_ARG (3, val);
 777       (*info->fprintf_func) (info->stream, "#%d", val+1);
 778       break;
 779
 780     case 'K':
 781       FETCH_ARG (9, val);
 782       (*info->fprintf_func) (info->stream, "#%d", val);
 783       break;
 784
 785     case 'M':
 786       if (place == 'h')
 787         {
 788           static char *const scalefactor_name[] = { "<<", ">>" };
 789
 790           FETCH_ARG (1, val);
 791           (*info->fprintf_func) (info->stream, scalefactor_name[val]);
 792         }
 793       else
 794         {
 795           FETCH_ARG (8, val);
 796           if (val & 0x80)
 797             val = val - 0x100;
 798           (*info->fprintf_func) (info->stream, "#%d", val);
 799         }
 800       break;
 801
 802     case 'T':
 803       FETCH_ARG (4, val);
 804       (*info->fprintf_func) (info->stream, "#%d", val);
 805       break;
 806
 807     case 'D':
 808       FETCH_ARG (3, val);
 809       (*info->fprintf_func) (info->stream, "%s", reg_names[val]);
 810       break;
 811
 812     case 'A':
 813       FETCH_ARG (3, val);
 814       (*info->fprintf_func) (info->stream, "%s", reg_names[val + 010]);
 815       break;
 816
 817     case 'R':
 818       FETCH_ARG (4, val);
 819       (*info->fprintf_func) (info->stream, "%s", reg_names[val]);
 820       break;
 821
 822     case 'r':
 823       FETCH_ARG (4, regno);
 824       if (regno > 7)
 825         (*info->fprintf_func) (info->stream, "%s@", reg_names[regno]);
 826       else
 827         (*info->fprintf_func) (info->stream, "@(%s)", reg_names[regno]);
 828       break;
 829
 830     case 'F':
 831       FETCH_ARG (3, val);
 832       (*info->fprintf_func) (info->stream, "%%fp%d", val);
 833       break;
 834
 835     case 'O':
 836       FETCH_ARG (6, val);
 837       if (val & 0x20)
 838         (*info->fprintf_func) (info->stream, "%s", reg_names[val & 7]);
 839       else
 840         (*info->fprintf_func) (info->stream, "%d", val);
 841       break;
 842
 843     case '+':
 844       FETCH_ARG (3, val);
 845       (*info->fprintf_func) (info->stream, "%s@+", reg_names[val + 8]);
 846       break;
 847
 848     case '-':
 849       FETCH_ARG (3, val);
 850       (*info->fprintf_func) (info->stream, "%s@-", reg_names[val + 8]);
 851       break;
 852
 853     case 'k':
 854       if (place == 'k')
 855         {
 856           FETCH_ARG (3, val);
 857           (*info->fprintf_func) (info->stream, "{%s}", reg_names[val]);
 858         }
 859       else if (place == 'C')
 860         {
 861           FETCH_ARG (7, val);
 862           if (val > 63)         /* This is a signed constant.  */
 863             val -= 128;
 864           (*info->fprintf_func) (info->stream, "{#%d}", val);
 865         }
 866       else
 867         return -1;
 868       break;
 869
 870     case '#':
 871     case '^':
 872       p1 = buffer + (*d == '#' ? 2 : 4);
 873       if (place == 's')
 874         FETCH_ARG (4, val);
 875       else if (place == 'C')
 876         FETCH_ARG (7, val);
 877       else if (place == '8')
 878         FETCH_ARG (3, val);
 879       else if (place == '3')
 880         FETCH_ARG (8, val);
 881       else if (place == 'b')
 882         NEXTBYTE (p1, val);
 883       else if (place == 'w' || place == 'W')
 884         NEXTWORD (p1, val, -3);
 885       else if (place == 'l')
 886         NEXTLONG (p1, val, -3);
 887       else
 888         return -2;
 889
 890       (*info->fprintf_func) (info->stream, "#%d", val);
 891       break;
 892
 893     case 'B':
 894       if (place == 'b')
 895         NEXTBYTE (p, disp);
 896       else if (place == 'B')
 897         disp = COERCE_SIGNED_CHAR (buffer[1]);
 898       else if (place == 'w' || place == 'W')
 899         NEXTWORD (p, disp, -3);
 900       else if (place == 'l' || place == 'L' || place == 'C')
 901         NEXTLONG (p, disp, -3);
 902       else if (place == 'g')
 903         {
 904           NEXTBYTE (buffer, disp);
 905           if (disp == 0)
 906             NEXTWORD (p, disp, -3);
 907           else if (disp == -1)
 908             NEXTLONG (p, disp, -3);
 909         }
 910       else if (place == 'c')
 911         {
 912           if (buffer[1] & 0x40)         /* If bit six is one, long offset.  */
 913             NEXTLONG (p, disp, -3);
 914           else
 915             NEXTWORD (p, disp, -3);
 916         }
 917       else
 918         return -2;
 919
 920       (*info->print_address_func) (addr + disp, info);
 921       break;
 922
 923     case 'd':
 924       {
 925         int val1;
 926
 927         NEXTWORD (p, val, -3);
 928         FETCH_ARG (3, val1);
 929         (*info->fprintf_func) (info->stream, "%s@(%d)", reg_names[val1 + 8], val);
 930         break;
 931       }
 932
 933     case 's':
 934       FETCH_ARG (3, val);
 935       (*info->fprintf_func) (info->stream, "%s", fpcr_names[val]);
 936       break;
 937
 938     case 'e':
 939       FETCH_ARG (2, val);
 940       (*info->fprintf_func) (info->stream, "%%acc%d", val);
 941       break;
 942
 943     case 'g':
 944       FETCH_ARG (1, val);
 945       (*info->fprintf_func) (info->stream, "%%accext%s", val == 0 ? "01" : "23");
 946       break;
 947
 948     case 'i':
 949       FETCH_ARG (2, val);
 950       if (val == 1)
 951         (*info->fprintf_func) (info->stream, "<<");
 952       else if (val == 3)
 953         (*info->fprintf_func) (info->stream, ">>");
 954       else
 955         return -1;
 956       break;
 957
 958     case 'I':
 959       /* Get coprocessor ID... */
 960       val = fetch_arg (buffer, 'd', 3, info);
 961       if (val < 0)
 962         return -3;
 963       if (val != 1)                             /* Unusual coprocessor ID?  */
 964         (*info->fprintf_func) (info->stream, "(cpid=%d) ", val);
 965       break;
 966
 967     case '4':
 968     case '*':
 969     case '~':
 970     case '%':
 971     case ';':
 972     case '@':
 973     case '!':
 974     case '$':
 975     case '?':
 976     case '/':
 977     case '&':
 978     case '|':
 979     case '<':
 980     case '>':
 981     case 'm':
 982     case 'n':
 983     case 'o':
 984     case 'p':
 985     case 'q':
 986     case 'v':
 987     case 'b':
 988     case 'w':
 989     case 'y':
 990     case 'z':
 991       if (place == 'd')
 992         {
 993           val = fetch_arg (buffer, 'x', 6, info);
 994           if (val < 0)
 995             return -3;
 996           val = ((val & 7) << 3) + ((val >> 3) & 7);
 997         }
 998       else
 999         {
1000           val = fetch_arg (buffer, 's', 6, info);
1001           if (val < 0)
1002             return -3;
1003         }
1004
1005       /* If the <ea> is invalid for *d, then reject this match.  */
1006       if (!m68k_valid_ea (*d, val))
1007         return -1;
1008
1009       /* Get register number assuming address register.  */
1010       regno = (val & 7) + 8;
1011       regname = reg_names[regno];
1012       switch (val >> 3)
1013         {
1014         case 0:
1015           (*info->fprintf_func) (info->stream, "%s", reg_names[val]);
1016           break;
1017
1018         case 1:
1019           (*info->fprintf_func) (info->stream, "%s", regname);
1020           break;
1021
1022         case 2:
1023           (*info->fprintf_func) (info->stream, "%s@", regname);
1024           break;
1025
1026         case 3:
1027           (*info->fprintf_func) (info->stream, "%s@+", regname);
1028           break;
1029
1030         case 4:
1031           (*info->fprintf_func) (info->stream, "%s@-", regname);
1032           break;
1033
1034         case 5:
1035           NEXTWORD (p, val, -3);
1036           (*info->fprintf_func) (info->stream, "%s@(%d)", regname, val);
1037           break;
1038
1039         case 6:
1040           p = print_indexed (regno, p, addr, info);
1041           if (p == NULL)
1042             return -3;
1043           break;
1044
1045         case 7:
1046           switch (val & 7)
1047             {
1048             case 0:
1049               NEXTWORD (p, val, -3);
1050               (*info->print_address_func) (val, info);
1051               break;
1052
1053             case 1:
1054               NEXTULONG (p, uval);
1055               (*info->print_address_func) (uval, info);
1056               break;
1057
1058             case 2:
1059               NEXTWORD (p, val, -3);
1060               (*info->fprintf_func) (info->stream, "%%pc@(");
1061               (*info->print_address_func) (addr + val, info);
1062               (*info->fprintf_func) (info->stream, ")");
1063               break;
1064
1065             case 3:
1066               p = print_indexed (-1, p, addr, info);
1067               if (p == NULL)
1068                 return -3;
1069               break;
1070
1071             case 4:
1072               flt_p = 1;        /* Assume it's a float... */
1073               switch (place)
1074               {
1075                 case 'b':
1076                   NEXTBYTE (p, val);
1077                   flt_p = 0;
1078                   break;
1079
1080                 case 'w':
1081                   NEXTWORD (p, val, -3);
1082                   flt_p = 0;
1083                   break;
1084
1085                 case 'l':
1086                   NEXTLONG (p, val, -3);
1087                   flt_p = 0;
1088                   break;
1089
1090                 case 'f':
1091                   NEXTSINGLE (flval, p);
1092                   break;
1093
1094                 case 'F':
1095                   NEXTDOUBLE (flval, p);
1096                   break;
1097
1098                 case 'x':
1099                   NEXTEXTEND (flval, p);
1100                   break;
1101
1102                 case 'p':
1103                   NEXTPACKED (p, flval);
1104                   break;
1105
1106                 default:
1107                   return -1;
1108               }
1109               if (flt_p)        /* Print a float? */
1110                 (*info->fprintf_func) (info->stream, "#%g", flval);
1111               else
1112                 (*info->fprintf_func) (info->stream, "#%d", val);
1113               break;
1114
1115             default:
1116               return -1;
1117             }
1118         }
1119
1120       /* If place is '/', then this is the case of the mask bit for
1121          mac/emac loads. Now that the arg has been printed, grab the
1122          mask bit and if set, add a '&' to the arg.  */
1123       if (place == '/')
1124         {
1125           FETCH_ARG (1, val);
1126           if (val)
1127             info->fprintf_func (info->stream, "&");
1128         }
1129       break;
1130
1131     case 'L':
1132     case 'l':
1133         if (place == 'w')
1134           {
1135             char doneany;
1136             p1 = buffer + 2;
1137             NEXTWORD (p1, val, -3);
1138             /* Move the pointer ahead if this point is farther ahead
1139                than the last.  */
1140             p = p1 > p ? p1 : p;
1141             if (val == 0)
1142               {
1143                 (*info->fprintf_func) (info->stream, "#0");
1144                 break;
1145               }
1146             if (*d == 'l')
1147               {
1148                 int newval = 0;
1149
1150                 for (regno = 0; regno < 16; ++regno)
1151                   if (val & (0x8000 >> regno))
1152                     newval |= 1 << regno;
1153                 val = newval;
1154               }
1155             val &= 0xffff;
1156             doneany = 0;
1157             for (regno = 0; regno < 16; ++regno)
1158               if (val & (1 << regno))
1159                 {
1160                   int first_regno;
1161
1162                   if (doneany)
1163                     (*info->fprintf_func) (info->stream, "/");
1164                   doneany = 1;
1165                   (*info->fprintf_func) (info->stream, "%s", reg_names[regno]);
1166                   first_regno = regno;
1167                   while (val & (1 << (regno + 1)))
1168                     ++regno;
1169                   if (regno > first_regno)
1170                     (*info->fprintf_func) (info->stream, "-%s",
1171                                            reg_names[regno]);
1172                 }
1173           }
1174         else if (place == '3')
1175           {
1176             /* `fmovem' insn.  */
1177             char doneany;
1178
1179             FETCH_ARG (8, val);
1180             if (val == 0)
1181               {
1182                 (*info->fprintf_func) (info->stream, "#0");
1183                 break;
1184               }
1185             if (*d == 'l')
1186               {
1187                 int newval = 0;
1188
1189                 for (regno = 0; regno < 8; ++regno)
1190                   if (val & (0x80 >> regno))
1191                     newval |= 1 << regno;
1192                 val = newval;
1193               }
1194             val &= 0xff;
1195             doneany = 0;
1196             for (regno = 0; regno < 8; ++regno)
1197               if (val & (1 << regno))
1198                 {
1199                   int first_regno;
1200                   if (doneany)
1201                     (*info->fprintf_func) (info->stream, "/");
1202                   doneany = 1;
1203                   (*info->fprintf_func) (info->stream, "%%fp%d", regno);
1204                   first_regno = regno;
1205                   while (val & (1 << (regno + 1)))
1206                     ++regno;
1207                   if (regno > first_regno)
1208                     (*info->fprintf_func) (info->stream, "-%%fp%d", regno);
1209                 }
1210           }
1211         else if (place == '8')
1212           {
1213             FETCH_ARG (3, val);
1214             /* fmoveml for FP status registers.  */
1215             (*info->fprintf_func) (info->stream, "%s", fpcr_names[val]);
1216           }
1217         else
1218           return -2;
1219       break;
1220
1221     case 'X':
1222       place = '8';
1223     case 'Y':
1224     case 'Z':
1225     case 'W':
1226     case '0':
1227     case '1':
1228     case '2':
1229     case '3':
1230       {
1231         int val;
1232         char *name = 0;
1233
1234         FETCH_ARG (5, val);
1235         switch (val)
1236           {
1237           case 2: name = "%tt0"; break;
1238           case 3: name = "%tt1"; break;
1239           case 0x10: name = "%tc"; break;
1240           case 0x11: name = "%drp"; break;
1241           case 0x12: name = "%srp"; break;
1242           case 0x13: name = "%crp"; break;
1243           case 0x14: name = "%cal"; break;
1244           case 0x15: name = "%val"; break;
1245           case 0x16: name = "%scc"; break;
1246           case 0x17: name = "%ac"; break;
1247           case 0x18: name = "%psr"; break;
1248           case 0x19: name = "%pcsr"; break;
1249           case 0x1c:
1250           case 0x1d:
1251             {
1252               int break_reg = ((buffer[3] >> 2) & 7);
1253
1254               (*info->fprintf_func)
1255                 (info->stream, val == 0x1c ? "%%bad%d" : "%%bac%d",
1256                  break_reg);
1257             }
1258             break;
1259           default:
1260             (*info->fprintf_func) (info->stream, "<mmu register %d>", val);
1261           }
1262         if (name)
1263           (*info->fprintf_func) (info->stream, "%s", name);
1264       }
1265       break;
1266
1267     case 'f':
1268       {
1269         int fc;
1270
1271         FETCH_ARG (5, fc);
1272         if (fc == 1)
1273           (*info->fprintf_func) (info->stream, "%%dfc");
1274         else if (fc == 0)
1275           (*info->fprintf_func) (info->stream, "%%sfc");
1276         else
1277           /* xgettext:c-format */
1278           (*info->fprintf_func) (info->stream, _("<function code %d>"), fc);
1279       }
1280       break;
1281
1282     case 'V':
1283       (*info->fprintf_func) (info->stream, "%%val");
1284       break;
1285
1286     case 't':
1287       {
1288         int level;
1289
1290         FETCH_ARG (3, level);
1291         (*info->fprintf_func) (info->stream, "%d", level);
1292       }
1293       break;
1294
1295     case 'u':
1296       {
1297         short is_upper = 0;
1298         int reg;
1299
1300         FETCH_ARG (5, reg);
1301         if (reg & 0x10)
1302           {
1303             is_upper = 1;
1304             reg &= 0xf;
1305           }
1306         (*info->fprintf_func) (info->stream, "%s%s",
1307                                reg_half_names[reg],
1308                                is_upper ? "u" : "l");
1309       }
1310       break;
1311
1312     default:
1313       return -2;
1314     }
1315
1316   return p - p0;
1317 }
1318
1319 /* Try to match the current instruction to best and if so, return the
1320    number of bytes consumed from the instruction stream, else zero.  */
1321
1322 static int
1323 match_insn_m68k (bfd_vma memaddr,
1324                  disassemble_info * info,
1325                  const struct m68k_opcode * best)
1326 {
1327   unsigned char *save_p;
1328   unsigned char *p;
1329   const char *d;
1330   const char *args = best->args;
1331
1332   struct private *priv = (struct private *) info->private_data;
1333   bfd_byte *buffer = priv->the_buffer;
1334   fprintf_ftype save_printer = info->fprintf_func;
1335   void (* save_print_address) (bfd_vma, struct disassemble_info *)
1336     = info->print_address_func;
1337
1338   if (*args == '.')
1339     args++;
1340
1341   /* Point at first word of argument data,
1342      and at descriptor for first argument.  */
1343   p = buffer + 2;
1344
1345   /* Figure out how long the fixed-size portion of the instruction is.
1346      The only place this is stored in the opcode table is
1347      in the arguments--look for arguments which specify fields in the 2nd
1348      or 3rd words of the instruction.  */
1349   for (d = args; *d; d += 2)
1350     {
1351       /* I don't think it is necessary to be checking d[0] here;
1352          I suspect all this could be moved to the case statement below.  */
1353       if (d[0] == '#')
1354         {
1355           if (d[1] == 'l' && p - buffer < 6)
1356             p = buffer + 6;
1357           else if (p - buffer < 4 && d[1] != 'C' && d[1] != '8')
1358             p = buffer + 4;
1359         }
1360
1361       if ((d[0] == 'L' || d[0] == 'l') && d[1] == 'w' && p - buffer < 4)
1362         p = buffer + 4;
1363
1364       switch (d[1])
1365         {
1366         case '1':
1367         case '2':
1368         case '3':
1369         case '7':
1370         case '8':
1371         case '9':
1372         case 'i':
1373           if (p - buffer < 4)
1374             p = buffer + 4;
1375           break;
1376         case '4':
1377         case '5':
1378         case '6':
1379           if (p - buffer < 6)
1380             p = buffer + 6;
1381           break;
1382         default:
1383           break;
1384         }
1385     }
1386
1387   /* pflusha is an exceptions.  It takes no arguments but is two words
1388      long.  Recognize it by looking at the lower 16 bits of the mask.  */
1389   if (p - buffer < 4 && (best->match & 0xFFFF) != 0)
1390     p = buffer + 4;
1391
1392   /* lpstop is another exception.  It takes a one word argument but is
1393      three words long.  */
1394   if (p - buffer < 6
1395       && (best->match & 0xffff) == 0xffff
1396       && args[0] == '#'
1397       && args[1] == 'w')
1398     {
1399       /* Copy the one word argument into the usual location for a one
1400          word argument, to simplify printing it.  We can get away with
1401          this because we know exactly what the second word is, and we
1402          aren't going to print anything based on it.  */
1403       p = buffer + 6;
1404       FETCH_DATA (info, p);
1405       buffer[2] = buffer[4];
1406       buffer[3] = buffer[5];
1407     }
1408
1409   FETCH_DATA (info, p);
1410
1411   save_p = p;
1412   info->print_address_func = dummy_print_address;
1413   info->fprintf_func = (fprintf_ftype) dummy_printer;
1414
1415   /* We scan the operands twice.  The first time we don't print anything,
1416      but look for errors.  */
1417   for (d = args; *d; d += 2)
1418     {
1419       int eaten = print_insn_arg (d, buffer, p, memaddr + (p - buffer), info);
1420
1421       if (eaten >= 0)
1422         p += eaten;
1423       else if (eaten == -1 || eaten == -3)
1424         {
1425           info->fprintf_func = save_printer;
1426           info->print_address_func = save_print_address;
1427           return 0;
1428         }
1429       else
1430         {
1431           /* We must restore the print functions before trying to print the
1432              error message.  */
1433           info->fprintf_func = save_printer;
1434           info->print_address_func = save_print_address;
1435           info->fprintf_func (info->stream,
1436                               /* xgettext:c-format */
1437                               _("<internal error in opcode table: %s %s>\n"),
1438                               best->name, best->args);
1439           return 2;
1440         }
1441     }
1442
1443   p = save_p;
1444   info->fprintf_func = save_printer;
1445   info->print_address_func = save_print_address;
1446
1447   d = args;
1448
1449   info->fprintf_func (info->stream, "%s", best->name);
1450
1451   if (*d)
1452     info->fprintf_func (info->stream, " ");
1453
1454   while (*d)
1455     {
1456       p += print_insn_arg (d, buffer, p, memaddr + (p - buffer), info);
1457       d += 2;
1458
1459       if (*d && *(d - 2) != 'I' && *d != 'k')
1460         info->fprintf_func (info->stream, ",");
1461     }
1462
1463   return p - buffer;
1464 }
1465
1466 /* Try to interpret the instruction at address MEMADDR as one that
1467    can execute on a processor with the features given by ARCH_MASK.
1468    If successful, print the instruction to INFO->STREAM and return
1469    its length in bytes.  Return 0 otherwise.  */
1470
1471 static int
1472 m68k_scan_mask (bfd_vma memaddr, disassemble_info *info,
1473                 unsigned int arch_mask)
1474 {
1475   int i;
1476   const char *d;
1477   static const struct m68k_opcode **opcodes[16];
1478   static int numopcodes[16];
1479   int val;
1480   int major_opcode;
1481
1482   struct private *priv = (struct private *) info->private_data;
1483   bfd_byte *buffer = priv->the_buffer;
1484
1485   if (!opcodes[0])
1486     {
1487       /* Speed up the matching by sorting the opcode
1488          table on the upper four bits of the opcode.  */
1489       const struct m68k_opcode **opc_pointer[16];
1490
1491       /* First count how many opcodes are in each of the sixteen buckets.  */
1492       for (i = 0; i < m68k_numopcodes; i++)
1493         numopcodes[(m68k_opcodes[i].opcode >> 28) & 15]++;
1494
1495       /* Then create a sorted table of pointers
1496          that point into the unsorted table.  */
1497       opc_pointer[0] = xmalloc (sizeof (struct m68k_opcode *)
1498                                 * m68k_numopcodes);
1499       opcodes[0] = opc_pointer[0];
1500
1501       for (i = 1; i < 16; i++)
1502         {
1503           opc_pointer[i] = opc_pointer[i - 1] + numopcodes[i - 1];
1504           opcodes[i] = opc_pointer[i];
1505         }
1506
1507       for (i = 0; i < m68k_numopcodes; i++)
1508         *opc_pointer[(m68k_opcodes[i].opcode >> 28) & 15]++ = &m68k_opcodes[i];
1509     }
1510
1511   FETCH_DATA (info, buffer + 2);
1512   major_opcode = (buffer[0] >> 4) & 15;
1513
1514   for (i = 0; i < numopcodes[major_opcode]; i++)
1515     {
1516       const struct m68k_opcode *opc = opcodes[major_opcode][i];
1517       unsigned long opcode = opc->opcode;
1518       unsigned long match = opc->match;
1519       const char *args = opc->args;
1520
1521       if (*args == '.')
1522         args++;
1523
1524       if (((0xff & buffer[0] & (match >> 24)) == (0xff & (opcode >> 24)))
1525           && ((0xff & buffer[1] & (match >> 16)) == (0xff & (opcode >> 16)))
1526           /* Only fetch the next two bytes if we need to.  */
1527           && (((0xffff & match) == 0)
1528               ||
1529               (FETCH_DATA (info, buffer + 4)
1530                && ((0xff & buffer[2] & (match >> 8)) == (0xff & (opcode >> 8)))
1531                && ((0xff & buffer[3] & match) == (0xff & opcode)))
1532               )
1533           && (opc->arch & arch_mask) != 0)
1534         {
1535           /* Don't use for printout the variants of divul and divsl
1536              that have the same register number in two places.
1537              The more general variants will match instead.  */
1538           for (d = args; *d; d += 2)
1539             if (d[1] == 'D')
1540               break;
1541
1542           /* Don't use for printout the variants of most floating
1543              point coprocessor instructions which use the same
1544              register number in two places, as above.  */
1545           if (*d == '\0')
1546             for (d = args; *d; d += 2)
1547               if (d[1] == 't')
1548                 break;
1549
1550           /* Don't match fmovel with more than one register;
1551              wait for fmoveml.  */
1552           if (*d == '\0')
1553             {
1554               for (d = args; *d; d += 2)
1555                 {
1556                   if (d[0] == 's' && d[1] == '8')
1557                     {
1558                       val = fetch_arg (buffer, d[1], 3, info);
1559                       if (val < 0)
1560                         return 0;
1561                       if ((val & (val - 1)) != 0)
1562                         break;
1563                     }
1564                 }
1565             }
1566
1567           /* Don't match FPU insns with non-default coprocessor ID.  */
1568           if (*d == '\0')
1569             {
1570               for (d = args; *d; d += 2)
1571                 {
1572                   if (d[0] == 'I')
1573                     {
1574                       val = fetch_arg (buffer, 'd', 3, info);
1575                       if (val != 1)
1576                         break;
1577                     }
1578                 }
1579             }
1580
1581           if (*d == '\0')
1582             if ((val = match_insn_m68k (memaddr, info, opc)))
1583               return val;
1584         }
1585     }
1586   return 0;
1587 }
1588
1589 /* Print the m68k instruction at address MEMADDR in debugged memory,
1590    on INFO->STREAM.  Returns length of the instruction, in bytes.  */
1591
1592 int
1593 print_insn_m68k (bfd_vma memaddr, disassemble_info *info)
1594 {
1595   unsigned int arch_mask;
1596   struct private priv;
1597   int val;
1598
1599   bfd_byte *buffer = priv.the_buffer;
1600
1601   info->private_data = & priv;
1602   /* Tell objdump to use two bytes per chunk
1603      and six bytes per line for displaying raw data.  */
1604   info->bytes_per_chunk = 2;
1605   info->bytes_per_line = 6;
1606   info->display_endian = BFD_ENDIAN_BIG;
1607   priv.max_fetched = priv.the_buffer;
1608   priv.insn_start = memaddr;
1609
1610   arch_mask = bfd_m68k_mach_to_features (info->mach);
1611   if (!arch_mask)
1612     {
1613       /* First try printing an m680x0 instruction.  Try printing a Coldfire
1614          one if that fails.  */
1615       val = m68k_scan_mask (memaddr, info, m68k_mask);
1616       if (val == 0)
1617         val = m68k_scan_mask (memaddr, info, mcf_mask);
1618     }
1619   else
1620     {
1621       val = m68k_scan_mask (memaddr, info, arch_mask);
1622     }
1623
1624   if (val == 0)
1625     /* Handle undefined instructions.  */
1626     info->fprintf_func (info->stream, "0%o", (buffer[0] << 8) + buffer[1]);
1627
1628   return val ? val : 2;
1629 }