gas/config/tc-m88k.c

   1 /* m88k.c -- Assembler for the Motorola 88000
   2    Contributed by Devon Bowen of Buffalo University
   3    and Torbjorn Granlund of the Swedish Institute of Computer Science.
   4    Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
   5    2000, 2001, 2002, 2003, 2005
   6    Free Software Foundation, Inc.
   7
   8    This file is part of GAS, the GNU Assembler.
   9
  10    GAS is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2, or (at your option)
  13    any later version.
  14
  15    GAS is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with GAS; see the file COPYING.  If not, write to the Free
  22    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  23    02110-1301, USA.  */
  24
  25 #include "as.h"
  26 #include "safe-ctype.h"
  27 #include "subsegs.h"
  28 #include "m88k-opcode.h"
  29
  30 struct field_val_assoc
  31 {
  32   char *name;
  33   unsigned val;
  34 };
  35
  36 struct field_val_assoc cr_regs[] =
  37 {
  38   {"PID", 0},
  39   {"PSR", 1},
  40   {"EPSR", 2},
  41   {"SSBR", 3},
  42   {"SXIP", 4},
  43   {"SNIP", 5},
  44   {"SFIP", 6},
  45   {"VBR", 7},
  46   {"DMT0", 8},
  47   {"DMD0", 9},
  48   {"DMA0", 10},
  49   {"DMT1", 11},
  50   {"DMD1", 12},
  51   {"DMA1", 13},
  52   {"DMT2", 14},
  53   {"DMD2", 15},
  54   {"DMA2", 16},
  55   {"SR0", 17},
  56   {"SR1", 18},
  57   {"SR2", 19},
  58   {"SR3", 20},
  59
  60   {NULL, 0},
  61 };
  62
  63 struct field_val_assoc fcr_regs[] =
  64 {
  65   {"FPECR", 0},
  66   {"FPHS1", 1},
  67   {"FPLS1", 2},
  68   {"FPHS2", 3},
  69   {"FPLS2", 4},
  70   {"FPPT", 5},
  71   {"FPRH", 6},
  72   {"FPRL", 7},
  73   {"FPIT", 8},
  74
  75   {"FPSR", 62},
  76   {"FPCR", 63},
  77
  78   {NULL, 0},
  79 };
  80
  81 struct field_val_assoc cmpslot[] =
  82 {
  83 /* Integer      Floating point.  */
  84   {"nc", 0},
  85   {"cp", 1},
  86   {"eq", 2},
  87   {"ne", 3},
  88   {"gt", 4},
  89   {"le", 5},
  90   {"lt", 6},
  91   {"ge", 7},
  92   {"hi", 8},    {"ou", 8},
  93   {"ls", 9},    {"ib", 9},
  94   {"lo", 10},   {"in", 10},
  95   {"hs", 11},   {"ob", 11},
  96   {"be", 12},   {"ue", 12},
  97   {"nb", 13},   {"lg", 13},
  98   {"he", 14},   {"ug", 14},
  99   {"nh", 15},   {"ule", 15},
 100                 {"ul", 16},
 101                 {"uge", 17},
 102
 103   {NULL, 0},
 104 };
 105
 106 struct field_val_assoc cndmsk[] =
 107 {
 108   {"gt0", 1},
 109   {"eq0", 2},
 110   {"ge0", 3},
 111   {"lt0", 12},
 112   {"ne0", 13},
 113   {"le0", 14},
 114
 115   {NULL, 0},
 116 };
 117
 118 struct m88k_insn
 119 {
 120   unsigned long opcode;
 121   expressionS exp;
 122   enum reloc_type reloc;
 123 };
 124
 125 extern char *myname;
 126 static struct hash_control *op_hash = NULL;
 127
 128 /* These bits should be turned off in the first address of every segment.  */
 129 int md_seg_align = 7;
 130
 131 /* These chars start a comment anywhere in a source file (except inside
 132    another comment.  */
 133 const char comment_chars[] = ";";
 134
 135 /* These chars only start a comment at the beginning of a line.  */
 136 const char line_comment_chars[] = "#";
 137
 138 const char line_separator_chars[] = "";
 139
 140 /* Chars that can be used to separate mant from exp in floating point nums.  */
 141 const char EXP_CHARS[] = "eE";
 142
 143 /* Chars that mean this number is a floating point constant.
 144    as in 0f123.456
 145    or    0H1.234E-12 (see exp chars above).  */
 146 const char FLT_CHARS[] = "dDfF";
 147
 148 void
 149 md_begin (void)
 150 {
 151   const char *retval = NULL;
 152   unsigned int i = 0;
 153
 154   /* Initialize hash table.  */
 155   op_hash = hash_new ();
 156
 157   while (*m88k_opcodes[i].name)
 158     {
 159       char *name = m88k_opcodes[i].name;
 160
 161       /* Hash each mnemonic and record its position.  */
 162       retval = hash_insert (op_hash, name, &m88k_opcodes[i]);
 163
 164       if (retval != NULL)
 165         as_fatal (_("Can't hash instruction '%s':%s"),
 166                   m88k_opcodes[i].name, retval);
 167
 168       /* Skip to next unique mnemonic or end of list.  */
 169       for (i++; !strcmp (m88k_opcodes[i].name, name); i++)
 170         ;
 171     }
 172 }
 173 \f
 174 const char *md_shortopts = "";
 175 struct option md_longopts[] =
 176 {
 177   {NULL, no_argument, NULL, 0}
 178 };
 179 size_t md_longopts_size = sizeof (md_longopts);
 180
 181 int
 182 md_parse_option (int c ATTRIBUTE_UNUSED, char *arg ATTRIBUTE_UNUSED)
 183 {
 184   return 0;
 185 }
 186
 187 void
 188 md_show_usage (FILE *stream ATTRIBUTE_UNUSED)
 189 {
 190 }
 191 \f
 192 static char *
 193 get_o6 (char *param, unsigned *valp)
 194 {
 195   unsigned val;
 196   char *save_ptr;
 197
 198   save_ptr = input_line_pointer;
 199   input_line_pointer = param;
 200   val = get_absolute_expression ();
 201   param = input_line_pointer;
 202   input_line_pointer = save_ptr;
 203
 204   if (val & 0x3)
 205     as_warn (_("Removed lower 2 bits of expression"));
 206
 207   *valp = val;
 208
 209   return (param);
 210 }
 211
 212 static char *
 213 get_vec9 (char *param, unsigned *valp)
 214 {
 215   unsigned val;
 216   char *save_ptr;
 217
 218   save_ptr = input_line_pointer;
 219   input_line_pointer = param;
 220   val = get_absolute_expression ();
 221   param = input_line_pointer;
 222   input_line_pointer = save_ptr;
 223
 224   if (val >= 1 << 9)
 225     as_warn (_("Expression truncated to 9 bits"));
 226
 227   *valp = val % (1 << 9);
 228
 229   return param;
 230 }
 231
 232 static char *
 233 get_bf2 (char *param, int bc)
 234 {
 235   int depth = 0;
 236   int c;
 237
 238   for (;;)
 239     {
 240       c = *param;
 241       if (c == 0)
 242         return param;
 243       else if (c == '(')
 244         depth++;
 245       else if (c == ')')
 246         depth--;
 247       else if (c == bc && depth <= 0)
 248         return param;
 249       param++;
 250     }
 251 }
 252
 253 static char *
 254 match_name (char *param,
 255             struct field_val_assoc *assoc_tab,
 256             unsigned *valp)
 257 {
 258   int i;
 259   char *name;
 260   int name_len;
 261
 262   for (i = 0;; i++)
 263     {
 264       name = assoc_tab[i].name;
 265       if (name == NULL)
 266         return NULL;
 267       name_len = strlen (name);
 268       if (!strncmp (param, name, name_len))
 269         {
 270           *valp = assoc_tab[i].val;
 271           return param + name_len;
 272         }
 273     }
 274 }
 275
 276 static char *
 277 get_bf_offset_expression (char *param, unsigned *offsetp)
 278 {
 279   unsigned offset;
 280
 281   if (ISALPHA (param[0]))
 282     {
 283       param[0] = TOLOWER (param[0]);
 284       param[1] = TOLOWER (param[1]);
 285
 286       param = match_name (param, cmpslot, offsetp);
 287
 288       return param;
 289     }
 290   else
 291     {
 292       input_line_pointer = param;
 293       offset = get_absolute_expression ();
 294       param = input_line_pointer;
 295     }
 296
 297   *offsetp = offset;
 298   return param;
 299 }
 300
 301 static char *
 302 get_bf (char *param, unsigned *valp)
 303 {
 304   unsigned offset = 0;
 305   unsigned width = 0;
 306   char *xp;
 307   char *save_ptr;
 308
 309   xp = get_bf2 (param, '<');
 310
 311   save_ptr = input_line_pointer;
 312   input_line_pointer = param;
 313   if (*xp == 0)
 314     {
 315       /* We did not find '<'.  We have an offset (width implicitly 32).  */
 316       param = get_bf_offset_expression (param, &offset);
 317       input_line_pointer = save_ptr;
 318       if (param == NULL)
 319         return NULL;
 320     }
 321   else
 322     {
 323       *xp++ = 0;                /* Overwrite the '<'.  */
 324       param = get_bf2 (xp, '>');
 325       if (*param == 0)
 326         return NULL;
 327       *param++ = 0;             /* Overwrite the '>'.  */
 328
 329       width = get_absolute_expression ();
 330       xp = get_bf_offset_expression (xp, &offset);
 331       input_line_pointer = save_ptr;
 332
 333       if (xp + 1 != param)
 334         return NULL;
 335     }
 336
 337   *valp = ((width % 32) << 5) | (offset % 32);
 338
 339   return param;
 340 }
 341
 342 static char *
 343 get_cr (char *param, unsigned *regnop)
 344 {
 345   unsigned regno;
 346   unsigned c;
 347
 348   if (!strncmp (param, "cr", 2))
 349     {
 350       param += 2;
 351
 352       regno = *param++ - '0';
 353       if (regno < 10)
 354         {
 355           if (regno == 0)
 356             {
 357               *regnop = 0;
 358               return param;
 359             }
 360           c = *param - '0';
 361           if (c < 10)
 362             {
 363               regno = regno * 10 + c;
 364               if (c < 64)
 365                 {
 366                   *regnop = regno;
 367                   return param + 1;
 368                 }
 369             }
 370           else
 371             {
 372               *regnop = regno;
 373               return param;
 374             }
 375         }
 376       return NULL;
 377     }
 378
 379   param = match_name (param, cr_regs, regnop);
 380
 381   return param;
 382 }
 383
 384 static char *
 385 get_fcr (char *param, unsigned *regnop)
 386 {
 387   unsigned regno;
 388   unsigned c;
 389
 390   if (!strncmp (param, "fcr", 3))
 391     {
 392       param += 3;
 393
 394       regno = *param++ - '0';
 395       if (regno < 10)
 396         {
 397           if (regno == 0)
 398             {
 399               *regnop = 0;
 400               return param;
 401             }
 402           c = *param - '0';
 403           if (c < 10)
 404             {
 405               regno = regno * 10 + c;
 406               if (c < 64)
 407                 {
 408                   *regnop = regno;
 409                   return param + 1;
 410                 }
 411             }
 412           else
 413             {
 414               *regnop = regno;
 415               return param;
 416             }
 417         }
 418       return NULL;
 419     }
 420
 421   param = match_name (param, fcr_regs, regnop);
 422
 423   return param;
 424 }
 425
 426 #define hexval(z) \
 427   (ISDIGIT (z) ? (z) - '0' :                                            \
 428    ISLOWER (z) ? (z) - 'a' + 10 :                                       \
 429    ISUPPER (z) ? (z) - 'A' + 10 : (unsigned) -1)
 430
 431 static char *
 432 getval (char *param, unsigned int *valp)
 433 {
 434   unsigned int val = 0;
 435   unsigned int c;
 436
 437   c = *param++;
 438   if (c == '0')
 439     {
 440       c = *param++;
 441       if (c == 'x' || c == 'X')
 442         {
 443           c = *param++;
 444           c = hexval (c);
 445           while (c < 16)
 446             {
 447               val = val * 16 + c;
 448               c = *param++;
 449               c = hexval (c);
 450             }
 451         }
 452       else
 453         {
 454           c -= '0';
 455           while (c < 8)
 456             {
 457               val = val * 8 + c;
 458               c = *param++ - '0';
 459             }
 460         }
 461     }
 462   else
 463     {
 464       c -= '0';
 465       while (c < 10)
 466         {
 467           val = val * 10 + c;
 468           c = *param++ - '0';
 469         }
 470     }
 471
 472   *valp = val;
 473   return param - 1;
 474 }
 475
 476 static char *
 477 get_cnd (char *param, unsigned *valp)
 478 {
 479   unsigned int val;
 480
 481   if (ISDIGIT (*param))
 482     {
 483       param = getval (param, &val);
 484
 485       if (val >= 32)
 486         {
 487           as_warn (_("Expression truncated to 5 bits"));
 488           val %= 32;
 489         }
 490     }
 491   else
 492     {
 493       param[0] = TOLOWER (param[0]);
 494       param[1] = TOLOWER (param[1]);
 495
 496       param = match_name (param, cndmsk, valp);
 497
 498       if (param == NULL)
 499         return NULL;
 500
 501       val = *valp;
 502     }
 503
 504   *valp = val << 21;
 505   return param;
 506 }
 507
 508 static char *
 509 get_reg (char *param, unsigned *regnop, unsigned int reg_prefix)
 510 {
 511   unsigned c;
 512   unsigned regno;
 513
 514   c = *param++;
 515   if (c == reg_prefix)
 516     {
 517       regno = *param++ - '0';
 518       if (regno < 10)
 519         {
 520           if (regno == 0)
 521             {
 522               *regnop = 0;
 523               return param;
 524             }
 525           c = *param - '0';
 526           if (c < 10)
 527             {
 528               regno = regno * 10 + c;
 529               if (c < 32)
 530                 {
 531                   *regnop = regno;
 532                   return param + 1;
 533                 }
 534             }
 535           else
 536             {
 537               *regnop = regno;
 538               return param;
 539             }
 540         }
 541       return NULL;
 542     }
 543   else if (c == 's' && param[0] == 'p')
 544     {
 545       *regnop = 31;
 546       return param + 1;
 547     }
 548
 549   return 0;
 550 }
 551
 552 static char *
 553 get_imm16 (char *param, struct m88k_insn *insn)
 554 {
 555   enum reloc_type reloc = NO_RELOC;
 556   unsigned int val;
 557   char *save_ptr;
 558
 559   if (!strncmp (param, "hi16", 4) && !ISALNUM (param[4]))
 560     {
 561       reloc = RELOC_HI16;
 562       param += 4;
 563     }
 564   else if (!strncmp (param, "lo16", 4) && !ISALNUM (param[4]))
 565     {
 566       reloc = RELOC_LO16;
 567       param += 4;
 568     }
 569   else if (!strncmp (param, "iw16", 4) && !ISALNUM (param[4]))
 570     {
 571       reloc = RELOC_IW16;
 572       param += 4;
 573     }
 574
 575   save_ptr = input_line_pointer;
 576   input_line_pointer = param;
 577   expression (&insn->exp);
 578   param = input_line_pointer;
 579   input_line_pointer = save_ptr;
 580
 581   val = insn->exp.X_add_number;
 582
 583   if (insn->exp.X_op == O_constant)
 584     {
 585       /* Insert the value now, and reset reloc to NO_RELOC.  */
 586       if (reloc == NO_RELOC)
 587         {
 588           /* Warn about too big expressions if not surrounded by xx16.  */
 589           if (val > 0xffff)
 590             as_warn (_("Expression truncated to 16 bits"));
 591         }
 592
 593       if (reloc == RELOC_HI16)
 594         val >>= 16;
 595
 596       insn->opcode |= val & 0xffff;
 597       reloc = NO_RELOC;
 598     }
 599   else if (reloc == NO_RELOC)
 600     /* We accept a symbol even without lo16, hi16, etc, and assume
 601        lo16 was intended.  */
 602     reloc = RELOC_LO16;
 603
 604   insn->reloc = reloc;
 605
 606   return param;
 607 }
 608
 609 static char *
 610 get_pcr (char *param, struct m88k_insn *insn, enum reloc_type reloc)
 611 {
 612   char *saveptr, *saveparam;
 613
 614   saveptr = input_line_pointer;
 615   input_line_pointer = param;
 616
 617   expression (&insn->exp);
 618
 619   saveparam = input_line_pointer;
 620   input_line_pointer = saveptr;
 621
 622   /* Botch: We should relocate now if O_constant.  */
 623   insn->reloc = reloc;
 624
 625   return saveparam;
 626 }
 627
 628 static char *
 629 get_cmp (char *param, unsigned *valp)
 630 {
 631   unsigned int val;
 632   char *save_ptr;
 633
 634   save_ptr = param;
 635
 636   param = match_name (param, cmpslot, valp);
 637   val = *valp;
 638
 639   if (param == NULL)
 640     {
 641       param = save_ptr;
 642
 643       save_ptr = input_line_pointer;
 644       input_line_pointer = param;
 645       val = get_absolute_expression ();
 646       param = input_line_pointer;
 647       input_line_pointer = save_ptr;
 648
 649       if (val >= 32)
 650         {
 651           as_warn (_("Expression truncated to 5 bits"));
 652           val %= 32;
 653         }
 654     }
 655
 656   *valp = val << 21;
 657   return param;
 658 }
 659
 660 static int
 661 calcop (struct m88k_opcode *format,
 662         char *param,
 663         struct m88k_insn *insn)
 664 {
 665   char *fmt = format->op_spec;
 666   int f;
 667   unsigned val;
 668   unsigned opcode;
 669   unsigned int reg_prefix = 'r';
 670
 671   insn->opcode = format->opcode;
 672   opcode = 0;
 673
 674   for (;;)
 675     {
 676       if (param == 0)
 677         return 0;
 678       f = *fmt++;
 679       switch (f)
 680         {
 681         case 0:
 682           insn->opcode |= opcode;
 683           return (*param == 0 || *param == '\n');
 684
 685         default:
 686           if (f != *param++)
 687             return 0;
 688           break;
 689
 690         case 'd':
 691           param = get_reg (param, &val, reg_prefix);
 692           reg_prefix = 'r';
 693           opcode |= val << 21;
 694           break;
 695
 696         case 'o':
 697           param = get_o6 (param, &val);
 698           opcode |= ((val >> 2) << 7);
 699           break;
 700
 701         case 'x':
 702           reg_prefix = 'x';
 703           break;
 704
 705         case '1':
 706           param = get_reg (param, &val, reg_prefix);
 707           reg_prefix = 'r';
 708           opcode |= val << 16;
 709           break;
 710
 711         case '2':
 712           param = get_reg (param, &val, reg_prefix);
 713           reg_prefix = 'r';
 714           opcode |= val;
 715           break;
 716
 717         case '3':
 718           param = get_reg (param, &val, 'r');
 719           opcode |= (val << 16) | val;
 720           break;
 721
 722         case 'I':
 723           param = get_imm16 (param, insn);
 724           break;
 725
 726         case 'b':
 727           param = get_bf (param, &val);
 728           opcode |= val;
 729           break;
 730
 731         case 'p':
 732           param = get_pcr (param, insn, RELOC_PC16);
 733           break;
 734
 735         case 'P':
 736           param = get_pcr (param, insn, RELOC_PC26);
 737           break;
 738
 739         case 'B':
 740           param = get_cmp (param, &val);
 741           opcode |= val;
 742           break;
 743
 744         case 'M':
 745           param = get_cnd (param, &val);
 746           opcode |= val;
 747           break;
 748
 749         case 'c':
 750           param = get_cr (param, &val);
 751           opcode |= val << 5;
 752           break;
 753
 754         case 'f':
 755           param = get_fcr (param, &val);
 756           opcode |= val << 5;
 757           break;
 758
 759         case 'V':
 760           param = get_vec9 (param, &val);
 761           opcode |= val;
 762           break;
 763
 764         case '?':
 765           /* Having this here repeats the warning somtimes.
 766            But can't we stand that?  */
 767           as_warn (_("Use of obsolete instruction"));
 768           break;
 769         }
 770     }
 771 }
 772
 773 void
 774 md_assemble (char *op)
 775 {
 776   char *param, *thisfrag;
 777   char c;
 778   struct m88k_opcode *format;
 779   struct m88k_insn insn;
 780
 781   assert (op);
 782
 783   /* Skip over instruction to find parameters.  */
 784   for (param = op; *param != 0 && !ISSPACE (*param); param++)
 785     ;
 786   c = *param;
 787   *param++ = '\0';
 788
 789   /* Try to find the instruction in the hash table.  */
 790   if ((format = (struct m88k_opcode *) hash_find (op_hash, op)) == NULL)
 791     {
 792       as_bad (_("Invalid mnemonic '%s'"), op);
 793       return;
 794     }
 795
 796   /* Try parsing this instruction into insn.  */
 797   insn.exp.X_add_symbol = 0;
 798   insn.exp.X_op_symbol = 0;
 799   insn.exp.X_add_number = 0;
 800   insn.exp.X_op = O_illegal;
 801   insn.reloc = NO_RELOC;
 802
 803   while (!calcop (format, param, &insn))
 804     {
 805       /* If it doesn't parse try the next instruction.  */
 806       if (!strcmp (format[0].name, format[1].name))
 807         format++;
 808       else
 809         {
 810           as_fatal (_("Parameter syntax error"));
 811           return;
 812         }
 813     }
 814
 815   /* Grow the current frag and plop in the opcode.  */
 816   thisfrag = frag_more (4);
 817   md_number_to_chars (thisfrag, insn.opcode, 4);
 818
 819   /* If this instruction requires labels mark it for later.  */
 820   switch (insn.reloc)
 821     {
 822     case NO_RELOC:
 823       break;
 824
 825     case RELOC_LO16:
 826     case RELOC_HI16:
 827       fix_new_exp (frag_now,
 828                    thisfrag - frag_now->fr_literal + 2,
 829                    2,
 830                    &insn.exp,
 831                    0,
 832                    insn.reloc);
 833       break;
 834
 835     case RELOC_IW16:
 836       fix_new_exp (frag_now,
 837                    thisfrag - frag_now->fr_literal,
 838                    4,
 839                    &insn.exp,
 840                    0,
 841                    insn.reloc);
 842       break;
 843
 844     case RELOC_PC16:
 845       fix_new_exp (frag_now,
 846                    thisfrag - frag_now->fr_literal + 2,
 847                    2,
 848                    &insn.exp,
 849                    1,
 850                    insn.reloc);
 851       break;
 852
 853     case RELOC_PC26:
 854       fix_new_exp (frag_now,
 855                    thisfrag - frag_now->fr_literal,
 856                    4,
 857                    &insn.exp,
 858                    1,
 859                    insn.reloc);
 860       break;
 861
 862     default:
 863       as_fatal (_("Unknown relocation type"));
 864       break;
 865     }
 866 }
 867
 868 void
 869 md_number_to_chars (char *buf, valueT val, int nbytes)
 870 {
 871   number_to_chars_bigendian (buf, val, nbytes);
 872 }
 873
 874 #define MAX_LITTLENUMS 6
 875
 876 /* Turn a string in input_line_pointer into a floating point constant of type
 877    type, and store the appropriate bytes in *litP.  The number of LITTLENUMS
 878    emitted is stored in *sizeP .  An error message is returned, or NULL on OK.  */
 879
 880 char *
 881 md_atof (int type, char *litP, int *sizeP)
 882 {
 883   int prec;
 884   LITTLENUM_TYPE words[MAX_LITTLENUMS];
 885   LITTLENUM_TYPE *wordP;
 886   char *t;
 887
 888   switch (type)
 889     {
 890     case 'f':
 891     case 'F':
 892     case 's':
 893     case 'S':
 894       prec = 2;
 895       break;
 896
 897     case 'd':
 898     case 'D':
 899     case 'r':
 900     case 'R':
 901       prec = 4;
 902       break;
 903
 904     case 'x':
 905     case 'X':
 906       prec = 6;
 907       break;
 908
 909     case 'p':
 910     case 'P':
 911       prec = 6;
 912       break;
 913
 914     default:
 915       *sizeP = 0;
 916       return _("Bad call to MD_ATOF()");
 917     }
 918   t = atof_ieee (input_line_pointer, type, words);
 919   if (t)
 920     input_line_pointer = t;
 921
 922   *sizeP = prec * sizeof (LITTLENUM_TYPE);
 923   for (wordP = words; prec--;)
 924     {
 925       md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
 926       litP += sizeof (LITTLENUM_TYPE);
 927     }
 928   return 0;
 929 }
 930
 931 int md_short_jump_size = 4;
 932
 933 void
 934 md_create_short_jump (char *ptr,
 935                       addressT from_addr ATTRIBUTE_UNUSED,
 936                       addressT to_addr ATTRIBUTE_UNUSED,
 937                       fragS *frag,
 938                       symbolS *to_symbol)
 939 {
 940   ptr[0] = (char) 0xc0;
 941   ptr[1] = 0x00;
 942   ptr[2] = 0x00;
 943   ptr[3] = 0x00;
 944   fix_new (frag,
 945            ptr - frag->fr_literal,
 946            4,
 947            to_symbol,
 948            (offsetT) 0,
 949            0,
 950            RELOC_PC26);         /* Botch: Shouldn't this be RELOC_PC16? */
 951 }
 952
 953 int md_long_jump_size = 4;
 954
 955 void
 956 md_create_long_jump (char *ptr,
 957                      addressT from_addr ATTRIBUTE_UNUSED,
 958                      addressT to_addr ATTRIBUTE_UNUSED,
 959                      fragS *frag,
 960                      symbolS *to_symbol)
 961 {
 962   ptr[0] = (char) 0xc0;
 963   ptr[1] = 0x00;
 964   ptr[2] = 0x00;
 965   ptr[3] = 0x00;
 966   fix_new (frag,
 967            ptr - frag->fr_literal,
 968            4,
 969            to_symbol,
 970            (offsetT) 0,
 971            0,
 972            RELOC_PC26);
 973 }
 974
 975 int
 976 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
 977                                segT segment_type ATTRIBUTE_UNUSED)
 978 {
 979   as_fatal (_("Relaxation should never occur"));
 980   return -1;
 981 }
 982
 983 #ifdef M88KCOFF
 984
 985 /* These functions are needed if we are linking with obj-coffbfd.c.
 986    That file may be replaced by a more BFD oriented version at some
 987    point.  If that happens, these functions should be reexamined.
 988
 989    Ian Lance Taylor, Cygnus Support, 13 July 1993.  */
 990
 991 /* Given a fixS structure (created by a call to fix_new, above),
 992    return the BFD relocation type to use for it.  */
 993
 994 short
 995 tc_coff_fix2rtype (fixS *fixp)
 996 {
 997   switch (fixp->fx_r_type)
 998     {
 999     case RELOC_LO16:
1000       return R_LVRT16;
1001     case RELOC_HI16:
1002       return R_HVRT16;
1003     case RELOC_PC16:
1004       return R_PCR16L;
1005     case RELOC_PC26:
1006       return R_PCR26L;
1007     case RELOC_32:
1008       return R_VRT32;
1009     case RELOC_IW16:
1010       return R_VRT16;
1011     default:
1012       abort ();
1013     }
1014 }
1015
1016 /* Apply a fixS to the object file.  Since COFF does not use addends
1017    in relocs, the addend is actually stored directly in the object
1018    file itself.  */
1019
1020 void
1021 md_apply_fix (fixS *fixP, valueT * valP, segT seg ATTRIBUTE_UNUSED)
1022 {
1023   long val = * (long *) valP;
1024   char *buf;
1025
1026   buf = fixP->fx_frag->fr_literal + fixP->fx_where;
1027   fixP->fx_offset = 0;
1028
1029   switch (fixP->fx_r_type)
1030     {
1031     case RELOC_IW16:
1032       fixP->fx_offset = val >> 16;
1033       buf[2] = val >> 8;
1034       buf[3] = val;
1035       break;
1036
1037     case RELOC_LO16:
1038       fixP->fx_offset = val >> 16;
1039       buf[0] = val >> 8;
1040       buf[1] = val;
1041       break;
1042
1043     case RELOC_HI16:
1044       fixP->fx_offset = val >> 16;
1045       buf[0] = val >> 8;
1046       buf[1] = val;
1047       break;
1048
1049     case RELOC_PC16:
1050       buf[0] = val >> 10;
1051       buf[1] = val >> 2;
1052       break;
1053
1054     case RELOC_PC26:
1055       buf[0] |= (val >> 26) & 0x03;
1056       buf[1] = val >> 18;
1057       buf[2] = val >> 10;
1058       buf[3] = val >> 2;
1059       break;
1060
1061     case RELOC_32:
1062       buf[0] = val >> 24;
1063       buf[1] = val >> 16;
1064       buf[2] = val >> 8;
1065       buf[3] = val;
1066       break;
1067
1068     default:
1069       abort ();
1070     }
1071
1072   if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
1073     fixP->fx_done = 1;
1074 }
1075
1076 /* Where a PC relative offset is calculated from.  On the m88k they
1077    are calculated from just after the instruction.  */
1078
1079 long
1080 md_pcrel_from (fixS *fixp)
1081 {
1082   switch (fixp->fx_r_type)
1083     {
1084     case RELOC_PC16:
1085       return fixp->fx_frag->fr_address + fixp->fx_where - 2;
1086     case RELOC_PC26:
1087       return fixp->fx_frag->fr_address + fixp->fx_where;
1088     default:
1089       abort ();
1090     }
1091 }
1092
1093 /* Fill in rs_align_code fragments.  */
1094
1095 void
1096 m88k_handle_align (fragS *fragp)
1097 {
1098   static const unsigned char nop_pattern[] = { 0xf4, 0x00, 0x58, 0x00 };
1099
1100   int bytes;
1101   char *p;
1102
1103   if (fragp->fr_type != rs_align_code)
1104     return;
1105
1106   bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix;
1107   p = fragp->fr_literal + fragp->fr_fix;
1108
1109   if (bytes & 3)
1110     {
1111       int fix = bytes & 3;
1112       memset (p, 0, fix);
1113       p += fix;
1114       bytes -= fix;
1115       fragp->fr_fix += fix;
1116     }
1117
1118   memcpy (p, nop_pattern, 4);
1119   fragp->fr_var = 4;
1120 }
1121
1122 #endif /* M88KCOFF */
1123
1124 const pseudo_typeS md_pseudo_table[] =
1125 {
1126   {"align", s_align_bytes, 4},
1127   {"def", s_set, 0},
1128   {"dfloat", float_cons, 'd'},
1129   {"ffloat", float_cons, 'f'},
1130   {"half", cons, 2},
1131   {"bss", s_lcomm, 1},
1132   {"string", stringer, 0},
1133   {"word", cons, 4},
1134   /* Force set to be treated as an instruction.  */
1135   {"set", NULL, 0},
1136   {".set", s_set, 0},
1137   {NULL, NULL, 0}
1138 };