opcodes/i960-dis.c

   1 /* Disassemble i80960 instructions.
   2    Copyright 1990, 1991, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2003,
   3    2005, 2007  Free Software Foundation, Inc.
   4
   5    This file is part of the GNU opcodes library.
   6
   7    This library is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    It is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; see the file COPYING.  If not, write to the
  19    Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "dis-asm.h"
  24
  25 static const char *const reg_names[] = {
  26 /*  0 */        "pfp", "sp",  "rip", "r3",  "r4",  "r5",  "r6",  "r7",
  27 /*  8 */        "r8",  "r9",  "r10", "r11", "r12", "r13", "r14", "r15",
  28 /* 16 */        "g0",  "g1",  "g2",  "g3",  "g4",  "g5",  "g6",  "g7",
  29 /* 24 */        "g8",  "g9",  "g10", "g11", "g12", "g13", "g14", "fp",
  30 /* 32 */        "pc",  "ac",  "ip",  "tc",  "fp0", "fp1", "fp2", "fp3"
  31 };
  32
  33
  34 static FILE *stream;            /* Output goes here */
  35 static struct disassemble_info *info;
  36 static void print_addr (bfd_vma);
  37 static void ctrl (bfd_vma, unsigned long, unsigned long);
  38 static void cobr (bfd_vma, unsigned long, unsigned long);
  39 static void reg (unsigned long);
  40 static int mem (bfd_vma, unsigned long, unsigned long, int);
  41 static void ea (bfd_vma, int, const char *, const char *, int, unsigned int);
  42 static void dstop (int, int, int);
  43 static void regop (int, int, int, int);
  44 static void invalid (int);
  45 static int pinsn (bfd_vma, unsigned long, unsigned long);
  46 static void put_abs (unsigned long, unsigned long);
  47
  48
  49 /* Print the i960 instruction at address 'memaddr' in debugged memory,
  50    on INFO->STREAM.  Returns length of the instruction, in bytes.  */
  51
  52 int
  53 print_insn_i960 (bfd_vma memaddr, struct disassemble_info *info_arg)
  54 {
  55   unsigned int word1, word2 = 0xdeadbeef;
  56   bfd_byte buffer[8];
  57   int status;
  58
  59   info = info_arg;
  60   stream = info->stream;
  61
  62   /* Read word1.  Only read word2 if the instruction
  63      needs it, to prevent reading past the end of a section.  */
  64
  65   status = (*info->read_memory_func) (memaddr, (bfd_byte *) buffer, 4, info);
  66   if (status != 0)
  67     {
  68       (*info->memory_error_func) (status, memaddr, info);
  69       return -1;
  70     }
  71
  72   word1 = bfd_getl32 (buffer);
  73
  74   /* Divide instruction set into classes based on high 4 bits of opcode.  */
  75   switch ( (word1 >> 28) & 0xf )
  76     {
  77     default:
  78       break;
  79     case 0x8:
  80     case 0x9:
  81     case 0xa:
  82     case 0xb:
  83     case 0xc:
  84       /* Read word2.  */
  85       status = (*info->read_memory_func)
  86         (memaddr + 4, (bfd_byte *) (buffer + 4), 4, info);
  87       if (status != 0)
  88         {
  89           (*info->memory_error_func) (status, memaddr, info);
  90           return -1;
  91         }
  92       word2 = bfd_getl32 (buffer + 4);
  93       break;
  94     }
  95
  96   return pinsn( memaddr, word1, word2 );
  97 }
  98 \f
  99 #define IN_GDB
 100
 101 /*****************************************************************************
 102  *      All code below this point should be identical with that of
 103  *      the disassembler in gdmp960.
 104
 105  A noble sentiment, but at least in cosmetic ways (info->fprintf_func), it
 106  just ain't so. -kingdon, 31 Mar 93
 107  *****************************************************************************/
 108
 109 struct tabent {
 110   char *name;
 111   short numops;
 112 };
 113
 114 struct sparse_tabent {
 115   int opcode;
 116   char *name;
 117   short numops;
 118 };
 119
 120 static int
 121 pinsn (bfd_vma memaddr, unsigned long word1, unsigned long word2)
 122 {
 123   int instr_len;
 124
 125   instr_len = 4;
 126   put_abs (word1, word2);
 127
 128   /* Divide instruction set into classes based on high 4 bits of opcode.  */
 129   switch ((word1 >> 28) & 0xf)
 130     {
 131     case 0x0:
 132     case 0x1:
 133       ctrl (memaddr, word1, word2);
 134       break;
 135     case 0x2:
 136     case 0x3:
 137       cobr (memaddr, word1, word2);
 138       break;
 139     case 0x5:
 140     case 0x6:
 141     case 0x7:
 142       reg (word1);
 143       break;
 144     case 0x8:
 145     case 0x9:
 146     case 0xa:
 147     case 0xb:
 148     case 0xc:
 149       instr_len = mem (memaddr, word1, word2, 0);
 150       break;
 151     default:
 152       /* Invalid instruction, print as data word.  */
 153       invalid (word1);
 154       break;
 155     }
 156   return instr_len;
 157 }
 158
 159 /* CTRL format.. */
 160
 161 static void
 162 ctrl (bfd_vma memaddr, unsigned long word1, unsigned long word2 ATTRIBUTE_UNUSED)
 163 {
 164   int i;
 165   static const struct tabent ctrl_tab[] = {
 166     { NULL,             0, },   /* 0x00 */
 167     { NULL,             0, },   /* 0x01 */
 168     { NULL,             0, },   /* 0x02 */
 169     { NULL,             0, },   /* 0x03 */
 170     { NULL,             0, },   /* 0x04 */
 171     { NULL,             0, },   /* 0x05 */
 172     { NULL,             0, },   /* 0x06 */
 173     { NULL,             0, },   /* 0x07 */
 174     { "b",              1, },   /* 0x08 */
 175     { "call",           1, },   /* 0x09 */
 176     { "ret",            0, },   /* 0x0a */
 177     { "bal",            1, },   /* 0x0b */
 178     { NULL,             0, },   /* 0x0c */
 179     { NULL,             0, },   /* 0x0d */
 180     { NULL,             0, },   /* 0x0e */
 181     { NULL,             0, },   /* 0x0f */
 182     { "bno",            1, },   /* 0x10 */
 183     { "bg",             1, },   /* 0x11 */
 184     { "be",             1, },   /* 0x12 */
 185     { "bge",            1, },   /* 0x13 */
 186     { "bl",             1, },   /* 0x14 */
 187     { "bne",            1, },   /* 0x15 */
 188     { "ble",            1, },   /* 0x16 */
 189     { "bo",             1, },   /* 0x17 */
 190     { "faultno",        0, },   /* 0x18 */
 191     { "faultg",         0, },   /* 0x19 */
 192     { "faulte",         0, },   /* 0x1a */
 193     { "faultge",        0, },   /* 0x1b */
 194     { "faultl",         0, },   /* 0x1c */
 195     { "faultne",        0, },   /* 0x1d */
 196     { "faultle",        0, },   /* 0x1e */
 197     { "faulto",         0, },   /* 0x1f */
 198   };
 199
 200   i = (word1 >> 24) & 0xff;
 201   if ((ctrl_tab[i].name == NULL) || ((word1 & 1) != 0))
 202     {
 203       invalid (word1);
 204       return;
 205     }
 206
 207   (*info->fprintf_func) (stream, ctrl_tab[i].name);
 208   if (word1 & 2)
 209     /* Predicts branch not taken.  */
 210     (*info->fprintf_func) (stream, ".f");
 211
 212   if (ctrl_tab[i].numops == 1)
 213     {
 214       /* Extract displacement and convert to address.  */
 215       word1 &= 0x00ffffff;
 216
 217       if (word1 & 0x00800000)
 218         {
 219           /* Sign bit is set.  */
 220           word1 |= (-1 & ~0xffffff);    /* Sign extend.  */
 221         }
 222
 223       (*info->fprintf_func) (stream, "\t");
 224       print_addr (word1 + memaddr);
 225     }
 226 }
 227
 228 /* COBR format.  */
 229
 230 static void
 231 cobr (bfd_vma memaddr, unsigned long word1, unsigned long word2 ATTRIBUTE_UNUSED)
 232 {
 233   int src1;
 234   int src2;
 235   int i;
 236
 237   static const struct tabent cobr_tab[] = {
 238     { "testno", 1, },   /* 0x20 */
 239     { "testg",  1, },   /* 0x21 */
 240     { "teste",  1, },   /* 0x22 */
 241     { "testge", 1, },   /* 0x23 */
 242     { "testl",  1, },   /* 0x24 */
 243     { "testne", 1, },   /* 0x25 */
 244     { "testle", 1, },   /* 0x26 */
 245     { "testo",  1, },   /* 0x27 */
 246     { NULL,     0, },   /* 0x28 */
 247     { NULL,     0, },   /* 0x29 */
 248     { NULL,     0, },   /* 0x2a */
 249     { NULL,     0, },   /* 0x2b */
 250     { NULL,     0, },   /* 0x2c */
 251     { NULL,     0, },   /* 0x2d */
 252     { NULL,     0, },   /* 0x2e */
 253     { NULL,     0, },   /* 0x2f */
 254     { "bbc",    3, },   /* 0x30 */
 255     { "cmpobg", 3, },   /* 0x31 */
 256     { "cmpobe", 3, },   /* 0x32 */
 257     { "cmpobge",3, },   /* 0x33 */
 258     { "cmpobl", 3, },   /* 0x34 */
 259     { "cmpobne",3, },   /* 0x35 */
 260     { "cmpoble",3, },   /* 0x36 */
 261     { "bbs",    3, },   /* 0x37 */
 262     { "cmpibno",3, },   /* 0x38 */
 263     { "cmpibg", 3, },   /* 0x39 */
 264     { "cmpibe", 3, },   /* 0x3a */
 265     { "cmpibge",3, },   /* 0x3b */
 266     { "cmpibl", 3, },   /* 0x3c */
 267     { "cmpibne",3, },   /* 0x3d */
 268     { "cmpible",3, },   /* 0x3e */
 269     { "cmpibo", 3, },   /* 0x3f */
 270   };
 271
 272   i = ((word1 >> 24) & 0xff) - 0x20;
 273   if (cobr_tab[i].name == NULL)
 274     {
 275       invalid (word1);
 276       return;
 277     }
 278
 279   (*info->fprintf_func) (stream, cobr_tab[i].name);
 280
 281   /* Predicts branch not taken.  */
 282   if (word1 & 2)
 283     (*info->fprintf_func) (stream, ".f");
 284
 285   (*info->fprintf_func) (stream, "\t");
 286
 287   src1 = (word1 >> 19) & 0x1f;
 288   src2 = (word1 >> 14) & 0x1f;
 289
 290   if (word1 & 0x02000)
 291     /* M1 is 1 */
 292     (*info->fprintf_func) (stream, "%d", src1);
 293   else
 294     (*info->fprintf_func) (stream, reg_names[src1]);
 295
 296   if (cobr_tab[i].numops > 1)
 297     {
 298       if (word1 & 1)
 299         /* S2 is 1.  */
 300         (*info->fprintf_func) (stream, ",sf%d,", src2);
 301       else
 302         /* S1 is 0.  */
 303         (*info->fprintf_func) (stream, ",%s,", reg_names[src2]);
 304
 305       /* Extract displacement and convert to address.  */
 306       word1 &= 0x00001ffc;
 307       if (word1 & 0x00001000)
 308         /* Negative displacement.  */
 309         word1 |= (-1 & ~0x1fff);        /* Sign extend.  */
 310
 311       print_addr (memaddr + word1);
 312     }
 313 }
 314
 315 /* MEM format.  */
 316 /* Returns instruction length: 4 or 8.  */
 317
 318 static int
 319 mem (bfd_vma memaddr, unsigned long word1, unsigned long word2, int noprint)
 320 {
 321   int i, j;
 322   int len;
 323   int mode;
 324   int offset;
 325   const char *reg1, *reg2, *reg3;
 326
 327   /* This lookup table is too sparse to make it worth typing in, but not
 328      so large as to make a sparse array necessary.  We create the table
 329      at runtime.  */
 330
 331   /* NOTE: In this table, the meaning of 'numops' is:
 332       1: single operand
 333       2: 2 operands, load instruction
 334      -2: 2 operands, store instruction.  */
 335   static struct tabent *mem_tab;
 336   /* Opcodes of 0x8X, 9X, aX, bX, and cX must be in the table.  */
 337 #define MEM_MIN 0x80
 338 #define MEM_MAX 0xcf
 339 #define MEM_SIZ ( * sizeof(struct tabent))
 340
 341   static const struct sparse_tabent mem_init[] = {
 342     { 0x80,     "ldob",  2 },
 343     { 0x82,     "stob", -2 },
 344     { 0x84,     "bx",    1 },
 345     { 0x85,     "balx",  2 },
 346     { 0x86,     "callx", 1 },
 347     { 0x88,     "ldos",  2 },
 348     { 0x8a,     "stos", -2 },
 349     { 0x8c,     "lda",   2 },
 350     { 0x90,     "ld",    2 },
 351     { 0x92,     "st",   -2 },
 352     { 0x98,     "ldl",   2 },
 353     { 0x9a,     "stl",  -2 },
 354     { 0xa0,     "ldt",   2 },
 355     { 0xa2,     "stt",  -2 },
 356     { 0xac,     "dcinva", 1 },
 357     { 0xb0,     "ldq",   2 },
 358     { 0xb2,     "stq",  -2 },
 359     { 0xc0,     "ldib",  2 },
 360     { 0xc2,     "stib", -2 },
 361     { 0xc8,     "ldis",  2 },
 362     { 0xca,     "stis", -2 },
 363     { 0,        NULL,   0 }
 364   };
 365   static struct tabent mem_tab_buf[MEM_MAX - MEM_MIN + 1];
 366
 367   if (mem_tab == NULL)
 368     {
 369       mem_tab = mem_tab_buf;
 370
 371       for (i = 0; mem_init[i].opcode != 0; i++)
 372         {
 373           j = mem_init[i].opcode - MEM_MIN;
 374           mem_tab[j].name = mem_init[i].name;
 375           mem_tab[j].numops = mem_init[i].numops;
 376         }
 377     }
 378
 379   i = ((word1 >> 24) & 0xff) - MEM_MIN;
 380   mode = (word1 >> 10) & 0xf;
 381
 382   if ((mem_tab[i].name != NULL)         /* Valid instruction */
 383       && ((mode == 5) || (mode >= 12)))
 384     /* With 32-bit displacement.  */
 385     len = 8;
 386   else
 387     len = 4;
 388
 389   if (noprint)
 390     return len;
 391
 392   if ((mem_tab[i].name == NULL) || (mode == 6))
 393     {
 394       invalid (word1);
 395       return len;
 396     }
 397
 398   (*info->fprintf_func) (stream, "%s\t", mem_tab[i].name);
 399
 400   reg1 = reg_names[ (word1 >> 19) & 0x1f ];     /* MEMB only */
 401   reg2 = reg_names[ (word1 >> 14) & 0x1f ];
 402   reg3 = reg_names[ word1 & 0x1f ];             /* MEMB only */
 403   offset = word1 & 0xfff;                               /* MEMA only  */
 404
 405   switch (mem_tab[i].numops)
 406     {
 407     case 2: /* LOAD INSTRUCTION */
 408       if (mode & 4)
 409         {                       /* MEMB FORMAT */
 410           ea (memaddr, mode, reg2, reg3, word1, word2);
 411           (*info->fprintf_func) (stream, ",%s", reg1);
 412         }
 413       else
 414         {                               /* MEMA FORMAT */
 415           (*info->fprintf_func) (stream, "0x%x", (unsigned) offset);
 416
 417           if (mode & 8)
 418             (*info->fprintf_func) (stream, "(%s)", reg2);
 419
 420           (*info->fprintf_func)(stream, ",%s", reg1);
 421         }
 422       break;
 423
 424     case -2: /* STORE INSTRUCTION */
 425       if (mode & 4)
 426         {
 427           /* MEMB FORMAT */
 428           (*info->fprintf_func) (stream, "%s,", reg1);
 429           ea (memaddr, mode, reg2, reg3, word1, word2);
 430         }
 431       else
 432         {
 433           /* MEMA FORMAT */
 434           (*info->fprintf_func) (stream, "%s,0x%x", reg1, (unsigned) offset);
 435
 436           if (mode & 8)
 437             (*info->fprintf_func) (stream, "(%s)", reg2);
 438         }
 439       break;
 440
 441     case 1: /* BX/CALLX INSTRUCTION */
 442       if (mode & 4)
 443         {
 444           /* MEMB FORMAT */
 445           ea (memaddr, mode, reg2, reg3, word1, word2);
 446         }
 447       else
 448         {
 449           /* MEMA FORMAT */
 450           (*info->fprintf_func) (stream, "0x%x", (unsigned) offset);
 451           if (mode & 8)
 452             (*info->fprintf_func) (stream, "(%s)", reg2);
 453         }
 454       break;
 455     }
 456
 457   return len;
 458 }
 459
 460 /* REG format.  */
 461
 462 static void
 463 reg (unsigned long word1)
 464 {
 465   int i, j;
 466   int opcode;
 467   int fp;
 468   int m1, m2, m3;
 469   int s1, s2;
 470   int src, src2, dst;
 471   char *mnemp;
 472
 473   /* This lookup table is too sparse to make it worth typing in, but not
 474      so large as to make a sparse array necessary.  We create the table
 475      at runtime.  */
 476
 477   /* NOTE: In this table, the meaning of 'numops' is:
 478          1: single operand, which is NOT a destination.
 479         -1: single operand, which IS a destination.
 480          2: 2 operands, the 2nd of which is NOT a destination.
 481         -2: 2 operands, the 2nd of which IS a destination.
 482          3: 3 operands
 483
 484         If an opcode mnemonic begins with "F", it is a floating-point
 485         opcode (the "F" is not printed).  */
 486
 487   static struct tabent *reg_tab;
 488   static const struct sparse_tabent reg_init[] =
 489   {
 490 #define REG_MIN 0x580
 491     { 0x580,    "notbit",       3 },
 492     { 0x581,    "and",          3 },
 493     { 0x582,    "andnot",       3 },
 494     { 0x583,    "setbit",       3 },
 495     { 0x584,    "notand",       3 },
 496     { 0x586,    "xor",          3 },
 497     { 0x587,    "or",           3 },
 498     { 0x588,    "nor",          3 },
 499     { 0x589,    "xnor",         3 },
 500     { 0x58a,    "not",          -2 },
 501     { 0x58b,    "ornot",        3 },
 502     { 0x58c,    "clrbit",       3 },
 503     { 0x58d,    "notor",        3 },
 504     { 0x58e,    "nand",         3 },
 505     { 0x58f,    "alterbit",     3 },
 506     { 0x590,    "addo",         3 },
 507     { 0x591,    "addi",         3 },
 508     { 0x592,    "subo",         3 },
 509     { 0x593,    "subi",         3 },
 510     { 0x594,    "cmpob",        2 },
 511     { 0x595,    "cmpib",        2 },
 512     { 0x596,    "cmpos",        2 },
 513     { 0x597,    "cmpis",        2 },
 514     { 0x598,    "shro",         3 },
 515     { 0x59a,    "shrdi",        3 },
 516     { 0x59b,    "shri",         3 },
 517     { 0x59c,    "shlo",         3 },
 518     { 0x59d,    "rotate",       3 },
 519     { 0x59e,    "shli",         3 },
 520     { 0x5a0,    "cmpo",         2 },
 521     { 0x5a1,    "cmpi",         2 },
 522     { 0x5a2,    "concmpo",      2 },
 523     { 0x5a3,    "concmpi",      2 },
 524     { 0x5a4,    "cmpinco",      3 },
 525     { 0x5a5,    "cmpinci",      3 },
 526     { 0x5a6,    "cmpdeco",      3 },
 527     { 0x5a7,    "cmpdeci",      3 },
 528     { 0x5ac,    "scanbyte",     2 },
 529     { 0x5ad,    "bswap",        -2 },
 530     { 0x5ae,    "chkbit",       2 },
 531     { 0x5b0,    "addc",         3 },
 532     { 0x5b2,    "subc",         3 },
 533     { 0x5b4,    "intdis",       0 },
 534     { 0x5b5,    "inten",        0 },
 535     { 0x5cc,    "mov",          -2 },
 536     { 0x5d8,    "eshro",        3 },
 537     { 0x5dc,    "movl",         -2 },
 538     { 0x5ec,    "movt",         -2 },
 539     { 0x5fc,    "movq",         -2 },
 540     { 0x600,    "synmov",       2 },
 541     { 0x601,    "synmovl",      2 },
 542     { 0x602,    "synmovq",      2 },
 543     { 0x603,    "cmpstr",       3 },
 544     { 0x604,    "movqstr",      3 },
 545     { 0x605,    "movstr",       3 },
 546     { 0x610,    "atmod",        3 },
 547     { 0x612,    "atadd",        3 },
 548     { 0x613,    "inspacc",      -2 },
 549     { 0x614,    "ldphy",        -2 },
 550     { 0x615,    "synld",        -2 },
 551     { 0x617,    "fill",         3 },
 552     { 0x630,    "sdma",         3 },
 553     { 0x631,    "udma",         0 },
 554     { 0x640,    "spanbit",      -2 },
 555     { 0x641,    "scanbit",      -2 },
 556     { 0x642,    "daddc",        3 },
 557     { 0x643,    "dsubc",        3 },
 558     { 0x644,    "dmovt",        -2 },
 559     { 0x645,    "modac",        3 },
 560     { 0x646,    "condrec",      -2 },
 561     { 0x650,    "modify",       3 },
 562     { 0x651,    "extract",      3 },
 563     { 0x654,    "modtc",        3 },
 564     { 0x655,    "modpc",        3 },
 565     { 0x656,    "receive",      -2 },
 566     { 0x658,    "intctl",       -2 },
 567     { 0x659,    "sysctl",       3 },
 568     { 0x65b,    "icctl",        3 },
 569     { 0x65c,    "dcctl",        3 },
 570     { 0x65d,    "halt",         0 },
 571     { 0x660,    "calls",        1 },
 572     { 0x662,    "send",         3 },
 573     { 0x663,    "sendserv",     1 },
 574     { 0x664,    "resumprcs",    1 },
 575     { 0x665,    "schedprcs",    1 },
 576     { 0x666,    "saveprcs",     0 },
 577     { 0x668,    "condwait",     1 },
 578     { 0x669,    "wait",         1 },
 579     { 0x66a,    "signal",       1 },
 580     { 0x66b,    "mark",         0 },
 581     { 0x66c,    "fmark",        0 },
 582     { 0x66d,    "flushreg",     0 },
 583     { 0x66f,    "syncf",        0 },
 584     { 0x670,    "emul",         3 },
 585     { 0x671,    "ediv",         3 },
 586     { 0x673,    "ldtime",       -1 },
 587     { 0x674,    "Fcvtir",       -2 },
 588     { 0x675,    "Fcvtilr",      -2 },
 589     { 0x676,    "Fscalerl",     3 },
 590     { 0x677,    "Fscaler",      3 },
 591     { 0x680,    "Fatanr",       3 },
 592     { 0x681,    "Flogepr",      3 },
 593     { 0x682,    "Flogr",        3 },
 594     { 0x683,    "Fremr",        3 },
 595     { 0x684,    "Fcmpor",       2 },
 596     { 0x685,    "Fcmpr",        2 },
 597     { 0x688,    "Fsqrtr",       -2 },
 598     { 0x689,    "Fexpr",        -2 },
 599     { 0x68a,    "Flogbnr",      -2 },
 600     { 0x68b,    "Froundr",      -2 },
 601     { 0x68c,    "Fsinr",        -2 },
 602     { 0x68d,    "Fcosr",        -2 },
 603     { 0x68e,    "Ftanr",        -2 },
 604     { 0x68f,    "Fclassr",      1 },
 605     { 0x690,    "Fatanrl",      3 },
 606     { 0x691,    "Flogeprl",     3 },
 607     { 0x692,    "Flogrl",       3 },
 608     { 0x693,    "Fremrl",       3 },
 609     { 0x694,    "Fcmporl",      2 },
 610     { 0x695,    "Fcmprl",       2 },
 611     { 0x698,    "Fsqrtrl",      -2 },
 612     { 0x699,    "Fexprl",       -2 },
 613     { 0x69a,    "Flogbnrl",     -2 },
 614     { 0x69b,    "Froundrl",     -2 },
 615     { 0x69c,    "Fsinrl",       -2 },
 616     { 0x69d,    "Fcosrl",       -2 },
 617     { 0x69e,    "Ftanrl",       -2 },
 618     { 0x69f,    "Fclassrl",     1 },
 619     { 0x6c0,    "Fcvtri",       -2 },
 620     { 0x6c1,    "Fcvtril",      -2 },
 621     { 0x6c2,    "Fcvtzri",      -2 },
 622     { 0x6c3,    "Fcvtzril",     -2 },
 623     { 0x6c9,    "Fmovr",        -2 },
 624     { 0x6d9,    "Fmovrl",       -2 },
 625     { 0x6e1,    "Fmovre",       -2 },
 626     { 0x6e2,    "Fcpysre",      3 },
 627     { 0x6e3,    "Fcpyrsre",     3 },
 628     { 0x701,    "mulo",         3 },
 629     { 0x708,    "remo",         3 },
 630     { 0x70b,    "divo",         3 },
 631     { 0x741,    "muli",         3 },
 632     { 0x748,    "remi",         3 },
 633     { 0x749,    "modi",         3 },
 634     { 0x74b,    "divi",         3 },
 635     { 0x780,    "addono",       3 },
 636     { 0x781,    "addino",       3 },
 637     { 0x782,    "subono",       3 },
 638     { 0x783,    "subino",       3 },
 639     { 0x784,    "selno",        3 },
 640     { 0x78b,    "Fdivr",        3 },
 641     { 0x78c,    "Fmulr",        3 },
 642     { 0x78d,    "Fsubr",        3 },
 643     { 0x78f,    "Faddr",        3 },
 644     { 0x790,    "addog",        3 },
 645     { 0x791,    "addig",        3 },
 646     { 0x792,    "subog",        3 },
 647     { 0x793,    "subig",        3 },
 648     { 0x794,    "selg",         3 },
 649     { 0x79b,    "Fdivrl",       3 },
 650     { 0x79c,    "Fmulrl",       3 },
 651     { 0x79d,    "Fsubrl",       3 },
 652     { 0x79f,    "Faddrl",       3 },
 653     { 0x7a0,    "addoe",        3 },
 654     { 0x7a1,    "addie",        3 },
 655     { 0x7a2,    "suboe",        3 },
 656     { 0x7a3,    "subie",        3 },
 657     { 0x7a4,    "sele",         3 },
 658     { 0x7b0,    "addoge",       3 },
 659     { 0x7b1,    "addige",       3 },
 660     { 0x7b2,    "suboge",       3 },
 661     { 0x7b3,    "subige",       3 },
 662     { 0x7b4,    "selge",        3 },
 663     { 0x7c0,    "addol",        3 },
 664     { 0x7c1,    "addil",        3 },
 665     { 0x7c2,    "subol",        3 },
 666     { 0x7c3,    "subil",        3 },
 667     { 0x7c4,    "sell",         3 },
 668     { 0x7d0,    "addone",       3 },
 669     { 0x7d1,    "addine",       3 },
 670     { 0x7d2,    "subone",       3 },
 671     { 0x7d3,    "subine",       3 },
 672     { 0x7d4,    "selne",        3 },
 673     { 0x7e0,    "addole",       3 },
 674     { 0x7e1,    "addile",       3 },
 675     { 0x7e2,    "subole",       3 },
 676     { 0x7e3,    "subile",       3 },
 677     { 0x7e4,    "selle",        3 },
 678     { 0x7f0,    "addoo",        3 },
 679     { 0x7f1,    "addio",        3 },
 680     { 0x7f2,    "suboo",        3 },
 681     { 0x7f3,    "subio",        3 },
 682     { 0x7f4,    "selo",         3 },
 683 #define REG_MAX 0x7f4
 684     { 0,        NULL,           0 }
 685   };
 686   static struct tabent reg_tab_buf[REG_MAX - REG_MIN + 1];
 687
 688   if (reg_tab == NULL)
 689     {
 690       reg_tab = reg_tab_buf;
 691
 692       for (i = 0; reg_init[i].opcode != 0; i++)
 693         {
 694           j = reg_init[i].opcode - REG_MIN;
 695           reg_tab[j].name = reg_init[i].name;
 696           reg_tab[j].numops = reg_init[i].numops;
 697         }
 698     }
 699
 700   opcode = ((word1 >> 20) & 0xff0) | ((word1 >> 7) & 0xf);
 701   i = opcode - REG_MIN;
 702
 703   if ((opcode<REG_MIN) || (opcode>REG_MAX) || (reg_tab[i].name==NULL))
 704     {
 705       invalid (word1);
 706       return;
 707     }
 708
 709   mnemp = reg_tab[i].name;
 710   if (*mnemp == 'F')
 711     {
 712       fp = 1;
 713       mnemp++;
 714     }
 715   else
 716     {
 717       fp = 0;
 718     }
 719
 720   (*info->fprintf_func) (stream, mnemp);
 721
 722   s1   = (word1 >> 5)  & 1;
 723   s2   = (word1 >> 6)  & 1;
 724   m1   = (word1 >> 11) & 1;
 725   m2   = (word1 >> 12) & 1;
 726   m3   = (word1 >> 13) & 1;
 727   src  =  word1        & 0x1f;
 728   src2 = (word1 >> 14) & 0x1f;
 729   dst  = (word1 >> 19) & 0x1f;
 730
 731   if  (reg_tab[i].numops != 0)
 732     {
 733       (*info->fprintf_func) (stream, "\t");
 734
 735     switch (reg_tab[i].numops)
 736       {
 737       case 1:
 738         regop (m1, s1, src, fp);
 739         break;
 740       case -1:
 741         dstop (m3, dst, fp);
 742         break;
 743       case 2:
 744         regop (m1, s1, src, fp);
 745         (*info->fprintf_func) (stream, ",");
 746         regop (m2, s2, src2, fp);
 747         break;
 748       case -2:
 749         regop (m1, s1, src, fp);
 750         (*info->fprintf_func) (stream, ",");
 751         dstop (m3, dst, fp);
 752         break;
 753       case 3:
 754         regop (m1, s1, src, fp);
 755         (*info->fprintf_func) (stream, ",");
 756         regop (m2, s2, src2, fp);
 757         (*info->fprintf_func) (stream, ",");
 758         dstop (m3, dst, fp);
 759         break;
 760       }
 761     }
 762 }
 763
 764 /* Print out effective address for memb instructions.  */
 765
 766 static void
 767 ea (bfd_vma memaddr, int mode, const char *reg2, const char *reg3, int word1,
 768     unsigned int word2)
 769 {
 770   int scale;
 771   static const int scale_tab[] = { 1, 2, 4, 8, 16 };
 772
 773   scale = (word1 >> 7) & 0x07;
 774
 775   if ((scale > 4) || (((word1 >> 5) & 0x03) != 0))
 776     {
 777       invalid (word1);
 778       return;
 779     }
 780   scale = scale_tab[scale];
 781
 782   switch (mode)
 783     {
 784     case 4:                                             /* (reg) */
 785       (*info->fprintf_func)( stream, "(%s)", reg2 );
 786       break;
 787     case 5:                                             /* displ+8(ip) */
 788       print_addr (word2 + 8 + memaddr);
 789       break;
 790     case 7:                                             /* (reg)[index*scale] */
 791       if (scale == 1)
 792         (*info->fprintf_func) (stream, "(%s)[%s]", reg2, reg3);
 793       else
 794         (*info->fprintf_func) (stream, "(%s)[%s*%d]", reg2, reg3, scale);
 795       break;
 796     case 12:                                    /* displacement */
 797       print_addr ((bfd_vma) word2);
 798       break;
 799     case 13:                                    /* displ(reg) */
 800       print_addr ((bfd_vma) word2);
 801       (*info->fprintf_func) (stream, "(%s)", reg2);
 802       break;
 803     case 14:                                    /* displ[index*scale] */
 804       print_addr ((bfd_vma) word2);
 805       if (scale == 1)
 806         (*info->fprintf_func) (stream, "[%s]", reg3);
 807       else
 808         (*info->fprintf_func) (stream, "[%s*%d]", reg3, scale);
 809       break;
 810     case 15:                            /* displ(reg)[index*scale] */
 811       print_addr ((bfd_vma) word2);
 812       if (scale == 1)
 813         (*info->fprintf_func) (stream, "(%s)[%s]", reg2, reg3);
 814       else
 815         (*info->fprintf_func) (stream, "(%s)[%s*%d]", reg2, reg3, scale);
 816       break;
 817     default:
 818       invalid (word1);
 819       return;
 820     }
 821 }
 822
 823
 824 /* Register Instruction Operand.  */
 825
 826 static void
 827 regop (int mode, int spec, int fp_reg, int fp)
 828 {
 829   if (fp)
 830     {
 831       /* Floating point instruction.  */
 832       if (mode == 1)
 833         {
 834           /* FP operand.  */
 835           switch (fp_reg)
 836             {
 837             case 0:  (*info->fprintf_func) (stream, "fp0");
 838               break;
 839             case 1:  (*info->fprintf_func) (stream, "fp1");
 840               break;
 841             case 2:  (*info->fprintf_func) (stream, "fp2");
 842               break;
 843             case 3:  (*info->fprintf_func) (stream, "fp3");
 844               break;
 845             case 16: (*info->fprintf_func) (stream, "0f0.0");
 846               break;
 847             case 22: (*info->fprintf_func) (stream, "0f1.0");
 848               break;
 849             default: (*info->fprintf_func) (stream, "?");
 850               break;
 851             }
 852         }
 853       else
 854         {
 855           /* Non-FP register.  */
 856           (*info->fprintf_func) (stream, reg_names[fp_reg]);
 857         }
 858     }
 859   else
 860     {
 861       /* Not floating point.  */
 862       if (mode == 1)
 863         {
 864           /* Literal.  */
 865           (*info->fprintf_func) (stream, "%d", fp_reg);
 866         }
 867       else
 868         {
 869           /* Register.  */
 870           if (spec == 0)
 871             (*info->fprintf_func) (stream, reg_names[fp_reg]);
 872           else
 873             (*info->fprintf_func) (stream, "sf%d", fp_reg);
 874         }
 875     }
 876 }
 877
 878 /* Register Instruction Destination Operand.  */
 879
 880 static void
 881 dstop (int mode, int dest_reg, int fp)
 882 {
 883   /* 'dst' operand can't be a literal. On non-FP instructions,  register
 884      mode is assumed and "m3" acts as if were "s3";  on FP-instructions,
 885      sf registers are not allowed so m3 acts normally.  */
 886   if (fp)
 887     regop (mode, 0, dest_reg, fp);
 888   else
 889     regop (0, mode, dest_reg, fp);
 890 }
 891
 892 static void
 893 invalid (int word1)
 894 {
 895   (*info->fprintf_func) (stream, ".word\t0x%08x", (unsigned) word1);
 896 }
 897
 898 static void
 899 print_addr (bfd_vma a)
 900 {
 901   (*info->print_address_func) (a, info);
 902 }
 903
 904 static void
 905 put_abs (unsigned long word1 ATTRIBUTE_UNUSED,
 906          unsigned long word2 ATTRIBUTE_UNUSED)
 907 {
 908 #ifdef IN_GDB
 909   return;
 910 #else
 911   int len;
 912
 913   switch ((word1 >> 28) & 0xf)
 914     {
 915     case 0x8:
 916     case 0x9:
 917     case 0xa:
 918     case 0xb:
 919     case 0xc:
 920       /* MEM format instruction.  */
 921       len = mem (0, word1, word2, 1);
 922       break;
 923     default:
 924       len = 4;
 925       break;
 926     }
 927
 928   if (len == 8)
 929     (*info->fprintf_func) (stream, "%08x %08x\t", word1, word2);
 930   else
 931     (*info->fprintf_func) (stream, "%08x         \t", word1);
 932 #endif
 933 }