gas/config/tc-or32.c

   1 /* Assembly backend for the OpenRISC 1000.
   2    Copyright (C) 2002 Free Software Foundation, Inc.
   3    Contributed by Damjan Lampret <lampret@opencores.org>.
   4    Modified bu Johan Rydberg, <johan.rydberg@netinsight.se>.
   5    Based upon a29k port.
   6
   7    This file is part of GAS, the GNU Assembler.
   8
   9    GAS is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2, or (at your option)
  12    any later version.
  13
  14    GAS is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with GAS; see the file COPYING.  If not, write to
  21    the Free Software Foundation, 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24 /* tc-a29k.c used as a template.  */
  25
  26 #include "safe-ctype.h"
  27 #include "as.h"
  28 #include "opcode/or32.h"
  29
  30 #ifdef BFD_ASSEMBLER
  31 #include "elf/or32.h"
  32 #endif
  33
  34 #define DEBUG 0
  35
  36 #ifndef REGISTER_PREFIX
  37 #define REGISTER_PREFIX   '%'
  38 #endif
  39
  40 /* Make it easier to clone this machine desc into another one.  */
  41 #define machine_opcode  or32_opcode
  42 #define machine_opcodes or32_opcodes
  43 #define machine_ip      or32_ip
  44 #define machine_it      or32_it
  45
  46 /* Handle of the OPCODE hash table.  */
  47 static struct hash_control *op_hash = NULL;
  48
  49 struct machine_it
  50   {
  51     char *          error;
  52     unsigned long   opcode;
  53     struct nlist *  nlistp;
  54     expressionS     exp;
  55     int             pcrel;
  56     int             reloc_offset;   /* Offset of reloc within insn.  */
  57     int             reloc;
  58   }
  59 the_insn;
  60
  61 static void machine_ip PARAMS ((char *));
  62
  63 const pseudo_typeS md_pseudo_table[] =
  64   {
  65     {"align",   s_align_bytes,  4 },
  66     {"space",   s_space,        0 },
  67     {"cputype", s_ignore,       0 },
  68     {"reg",     s_lsym,         0 },  /* Register equate, same as equ.  */
  69     {"sect",    s_ignore,       0 },  /* Creation of coff sections.  */
  70     {"proc",    s_ignore,       0 },  /* Start of a function.  */
  71     {"endproc", s_ignore,       0 },  /* Function end.  */
  72     {"word",    cons,           4 },
  73     {NULL,      0,              0 },
  74   };
  75
  76 int md_short_jump_size  = 4;
  77 int md_long_jump_size   = 4;
  78
  79 #if defined(BFD_HEADERS)
  80 #ifdef RELSZ
  81 const int md_reloc_size = RELSZ;  /* Coff headers.  */
  82 #else
  83 const int md_reloc_size = 12;   /* Something else headers.  */
  84 #endif
  85 #else
  86 const int md_reloc_size = 12;   /* Not bfdized.  */
  87 #endif
  88
  89 /* This array holds the chars that always start a comment.
  90    If the pre-processor is disabled, these aren't very useful.  */
  91 const char comment_chars[] = "#";
  92
  93 /* This array holds the chars that only start a comment at the beginning of
  94    a line.  If the line seems to have the form '# 123 filename'
  95    .line and .file directives will appear in the pre-processed output.  */
  96 /* Note that input_file.c hand checks for '#' at the beginning of the
  97    first line of the input file.  This is because the compiler outputs
  98    #NO_APP at the beginning of its output.  */
  99 /* Also note that comments like this one will always work.  */
 100 const char line_comment_chars[] = "#";
 101
 102 /* We needed an unused char for line separation to work around the
 103    lack of macros, using sed and such.  */
 104 const char line_separator_chars[] = ";";
 105
 106 /* Chars that can be used to separate mant from exp in floating point nums.  */
 107 const char EXP_CHARS[] = "eE";
 108
 109 /* Chars that mean this number is a floating point constant.
 110    As in 0f12.456
 111    or    0d1.2345e12.  */
 112 const char FLT_CHARS[] = "rRsSfFdDxXpP";
 113
 114 /* "l.jalr r9" precalculated opcode.  */
 115 static unsigned long jalr_r9_opcode;
 116
 117
 118 static int check_invalid_opcode PARAMS ((unsigned long));
 119 static void encode PARAMS ((const struct machine_opcode *, unsigned long *, signed long, char));
 120 static char *parse_operand PARAMS ((char *, expressionS *, int));
 121
 122 /* Set bits in machine opcode according to insn->encoding
 123    description and passed operand.  */
 124
 125 static void
 126 encode (insn, opcode, param_val, param_ch)
 127      const struct machine_opcode *insn;
 128      unsigned long *opcode;
 129      signed long param_val;
 130      char param_ch;
 131 {
 132   int opc_pos = 0;
 133   int param_pos = 0;
 134   char *enc;
 135
 136 #if DEBUG
 137   printf ("    encode:  opcode=%.8lx  param_val=%.8lx abs=%.8lx param_ch=%c\n",
 138           *opcode, param_val, abs (param_val), param_ch);
 139 #endif
 140   for (enc = insn->encoding; *enc != '\0'; enc++)
 141     if (*enc == param_ch)
 142       {
 143         if (enc - 2 >= insn->encoding && (*(enc - 2) == '0') && (*(enc - 1) == 'x'))
 144           continue;
 145         else
 146           param_pos ++;
 147       }
 148
 149   opc_pos = 32;
 150
 151   for (enc = insn->encoding; *enc != '\0';)
 152     {
 153       if ((*enc == '0') && (*(enc + 1) == 'x'))
 154         {
 155           int tmp = strtol (enc, NULL, 16);
 156
 157           opc_pos -= 4;
 158           *opcode |= tmp << opc_pos;
 159           enc += 3;
 160         }
 161       else if ((*enc == '0') || (*enc == '-'))
 162         {
 163           opc_pos--;
 164           enc++;
 165         }
 166       else if (*enc == '1')
 167         {
 168           opc_pos--;
 169           *opcode |= 1 << opc_pos;
 170           enc++;
 171         }
 172       else if (*enc == param_ch)
 173         {
 174           opc_pos--;
 175           param_pos--;
 176           *opcode |= ((param_val >> param_pos) & 0x1) << opc_pos;
 177           enc++;
 178         }
 179       else if (ISALPHA (*enc))
 180         {
 181           opc_pos--;
 182           enc++;
 183         }
 184       else
 185         enc++;
 186     }
 187
 188 #if DEBUG
 189   printf ("    opcode=%.8lx\n", *opcode);
 190 #endif
 191 }
 192
 193 /* This function is called once, at assembler startup time.  It should
 194    set up all the tables, etc., that the MD part of the assembler will
 195    need.  */
 196
 197 void
 198 md_begin ()
 199 {
 200   const char *retval = NULL;
 201   int lose = 0;
 202   int skipnext = 0;
 203   unsigned int i;
 204
 205   /* Hash up all the opcodes for fast use later.  */
 206   op_hash = hash_new ();
 207
 208   for (i = 0; i < or32_num_opcodes; i++)
 209     {
 210       const char *name = machine_opcodes[i].name;
 211
 212       if (skipnext)
 213         {
 214           skipnext = 0;
 215           continue;
 216         }
 217
 218       retval = hash_insert (op_hash, name, (PTR) &machine_opcodes[i]);
 219       if (retval != NULL)
 220         {
 221           fprintf (stderr, "internal error: can't hash `%s': %s\n",
 222                    machine_opcodes[i].name, retval);
 223           lose = 1;
 224         }
 225     }
 226
 227   if (lose)
 228     as_fatal (_("Broken assembler.  No assembly attempted."));
 229
 230   encode (&machine_opcodes[insn_index ("l.jalr")], &jalr_r9_opcode, 9, 'B');
 231 }
 232
 233 /* Returns non zero if instruction is to be used.  */
 234
 235 static int
 236 check_invalid_opcode (opcode)
 237      unsigned long opcode;
 238 {
 239   return opcode == jalr_r9_opcode;
 240 }
 241
 242 /* Assemble a single instruction.  Its label has already been handled
 243    by the generic front end.  We just parse opcode and operands, and
 244    produce the bytes of data and relocation.  */
 245
 246 void
 247 md_assemble (str)
 248      char *str;
 249 {
 250   char *toP;
 251
 252 #if DEBUG
 253   printf ("NEW INSTRUCTION\n");
 254 #endif
 255
 256   know (str);
 257   machine_ip (str);
 258   toP = frag_more (4);
 259
 260   /* Put out the opcode.  */
 261   md_number_to_chars (toP, the_insn.opcode, 4);
 262
 263   /* Put out the symbol-dependent stuff.  */
 264 #ifdef BFD_ASSEMBLER
 265   if (the_insn.reloc != BFD_RELOC_NONE)
 266 #else
 267   if (the_insn.reloc != NO_RELOC)
 268 #endif
 269     {
 270       fix_new_exp (frag_now,
 271                    (toP - frag_now->fr_literal + the_insn.reloc_offset),
 272                    4,   /* size */
 273                    &the_insn.exp,
 274                    the_insn.pcrel,
 275                    the_insn.reloc);
 276     }
 277 }
 278
 279 /* This is true of the we have issued a "lo(" or "hi"(.  */
 280 static int waiting_for_shift = 0;
 281
 282 static int mask_or_shift = 0;
 283
 284 #ifdef BFD_ASSEMBLER
 285 static char *
 286 parse_operand (s, operandp, opt)
 287      char *s;
 288      expressionS *operandp;
 289      int opt;
 290 {
 291   char *save = input_line_pointer;
 292   char *new;
 293
 294 #if DEBUG
 295   printf ("  PROCESS NEW OPERAND(%s) == %c (%d)\n", s, opt ? opt : '!', opt);
 296 #endif
 297
 298   input_line_pointer = s;
 299
 300   if (strncasecmp (s, "HI(", 3) == 0)
 301     {
 302       waiting_for_shift = 1;
 303       mask_or_shift = BFD_RELOC_HI16;
 304
 305       input_line_pointer += 3;
 306     }
 307   else if (strncasecmp (s, "LO(", 3) == 0)
 308     {
 309       mask_or_shift = BFD_RELOC_LO16;
 310
 311       input_line_pointer += 3;
 312     }
 313   else
 314     mask_or_shift = 0;
 315
 316   if ((*s == '(') && (*(s+1) == 'r'))
 317     s++;
 318
 319   if ((*s == 'r') && ISDIGIT (*(s + 1)))
 320     {
 321       operandp->X_add_number = strtol (s + 1, NULL, 10);
 322       operandp->X_op = O_register;
 323       for (; (*s != ',') && (*s != '\0');)
 324         s++;
 325       input_line_pointer = save;
 326       return s;
 327     }
 328
 329   expression (operandp);
 330
 331   if (operandp->X_op == O_absent)
 332     {
 333       if (! opt)
 334         as_bad (_("missing operand"));
 335       else
 336         {
 337           operandp->X_add_number = 0;
 338           operandp->X_op = O_constant;
 339         }
 340     }
 341
 342   new = input_line_pointer;
 343   input_line_pointer = save;
 344
 345 #if DEBUG
 346   printf ("  %s=parse_operand(%s): operandp->X_op = %u\n", new, s, operandp->X_op);
 347 #endif
 348
 349   return new;
 350 }
 351 #else
 352
 353 static char *
 354 parse_operand (s, operandp, opt)
 355      char *s;
 356      expressionS *operandp;
 357      int opt;
 358 {
 359   char *save = input_line_pointer;
 360   char *new;
 361
 362 #if DEBUG
 363   printf ("  PROCESS NEW OPERAND(%s) == %c (%d)\n", s, opt ? opt : '!', opt);
 364 #endif
 365
 366   input_line_pointer = s;
 367
 368   if (strncasecmp (s, "HI(", 3) == 0)
 369     {
 370       waiting_for_shift = 1;
 371       mask_or_shift = RELOC_CONSTH;
 372
 373       input_line_pointer += 3;
 374     }
 375   else if (strncasecmp (s, "LO(", 3) == 0)
 376     {
 377       mask_or_shift = RELOC_CONST;
 378
 379       input_line_pointer += 3;
 380     }
 381   else
 382     mask_or_shift = 0;
 383
 384
 385   expression (operandp);
 386
 387   if (operandp->X_op == O_absent)
 388     {
 389       if (! opt)
 390         as_bad (_("missing operand"));
 391       else
 392         {
 393           operandp->X_add_number = 0;
 394           operandp->X_op = O_constant;
 395         }
 396     }
 397
 398   new = input_line_pointer;
 399   input_line_pointer = save;
 400
 401   if ((operandp->X_op == O_symbol) && (*s != '_'))
 402     {
 403 #if DEBUG
 404       printf ("symbol: '%s'\n", save);
 405 #endif
 406
 407       for (save = s; s < new; s++)
 408         if ((*s == REGISTER_PREFIX) && (*(s + 1) == 'r')) /* Register prefix.  */
 409           s++;
 410
 411         if ((*s == 'r') && ISDIGIT (*(s + 1)))
 412           {
 413             operandp->X_add_number = strtol (s + 1, NULL, 10);
 414             operandp->X_op = O_register;
 415           }
 416       s = save;
 417     }
 418
 419 #if DEBUG
 420   printf ("  %s=parse_operand(%s): operandp->X_op = %u\n", new, s, operandp->X_op);
 421 #endif
 422
 423   return new;
 424 }
 425 #endif
 426
 427 /* Instruction parsing.  Takes a string containing the opcode.
 428    Operands are at input_line_pointer.  Output is in the_insn.
 429    Warnings or errors are generated.  */
 430
 431 #ifdef BFD_ASSEMBLER
 432 static void
 433 machine_ip (str)
 434      char *str;
 435 {
 436   char *s;
 437   const char *args;
 438   const struct machine_opcode *insn;
 439   char *argsStart;
 440   unsigned long opcode;
 441   expressionS the_operand;
 442   expressionS *operand = &the_operand;
 443   unsigned int regno;
 444   int reloc = BFD_RELOC_NONE;
 445
 446 #if DEBUG
 447   printf ("machine_ip(%s)\n", str);
 448 #endif
 449
 450   s = str;
 451   for (; ISALNUM (*s) || *s == '.'; ++s)
 452     if (ISUPPER (*s))
 453       *s = TOLOWER (*s);
 454
 455   switch (*s)
 456     {
 457     case '\0':
 458       break;
 459
 460     case ' ':     /* FIXME-SOMEDAY more whitespace.  */
 461       *s++ = '\0';
 462       break;
 463
 464     default:
 465       as_bad (_("unknown opcode1: `%s'"), str);
 466       return;
 467     }
 468
 469   if ((insn = (struct machine_opcode *) hash_find (op_hash, str)) == NULL)
 470     {
 471       as_bad (_("unknown opcode2 `%s'."), str);
 472       return;
 473     }
 474
 475   argsStart = s;
 476   opcode = 0;
 477   memset (&the_insn, '\0', sizeof (the_insn));
 478   the_insn.reloc = BFD_RELOC_NONE;
 479
 480   reloc = BFD_RELOC_NONE;
 481
 482   /* Build the opcode, checking as we go to make sure that the
 483      operands match.
 484
 485      If an operand matches, we modify the_insn or opcode appropriately,
 486      and do a "continue".  If an operand fails to match, we "break".  */
 487   if (insn->args[0] != '\0')
 488     {
 489       /* Prime the pump.  */
 490       s = parse_operand (s, operand, insn->args[0] == 'I');
 491     }
 492
 493   for (args = insn->args;; ++args)
 494     {
 495 #if DEBUG
 496       printf ("  args = %s\n", args);
 497 #endif
 498       switch (*args)
 499         {
 500         case '\0':    /* End of args.  */
 501           /* We have have 0 args, do the bazoooka!  */
 502           if (args == insn->args)
 503             encode (insn, &opcode, 0, 0);
 504
 505           if (*s == '\0')
 506             {
 507               /* We are truly done.  */
 508               the_insn.opcode = opcode;
 509               if (check_invalid_opcode (opcode))
 510                 as_bad (_("instruction not allowed: %s"), str);
 511               return;
 512             }
 513           as_bad (_("too many operands: %s"), s);
 514           break;
 515
 516         case ',':   /* Must match a comma.  */
 517           if (*s++ == ',')
 518             {
 519               reloc = BFD_RELOC_NONE;
 520
 521               /* Parse next operand.  */
 522               s = parse_operand (s, operand, args[1] == 'I');
 523 #if DEBUG
 524               printf ("    ',' case: operand->X_add_number = %d, *args = %s, *s = %s\n",
 525                       operand->X_add_number, args, s);
 526 #endif
 527               continue;
 528             }
 529           break;
 530
 531         case '(':   /* Must match a (.  */
 532           s = parse_operand (s, operand, args[1] == 'I');
 533           continue;
 534
 535         case ')':   /* Must match a ).  */
 536           continue;
 537
 538         case 'r':   /* A general register.  */
 539           args++;
 540
 541           if (operand->X_op != O_register)
 542             break;    /* Only registers.  */
 543
 544           know (operand->X_add_symbol == 0);
 545           know (operand->X_op_symbol == 0);
 546           regno = operand->X_add_number;
 547           encode (insn, &opcode, regno, *args);
 548 #if DEBUG
 549           printf ("    r: operand->X_op = %d\n", operand->X_op);
 550 #endif
 551           continue;
 552
 553         default:
 554           /* if (! ISALPHA (*args))
 555                break;  */   /* Only immediate values.  */
 556
 557           if (mask_or_shift)
 558             {
 559 #if DEBUG
 560               printf ("mask_or_shift = %d\n", mask_or_shift);
 561 #endif
 562               reloc = mask_or_shift;
 563             }
 564           mask_or_shift = 0;
 565
 566           if (strncasecmp (args, "LO(", 3) == 0)
 567             {
 568 #if DEBUG
 569               printf ("reloc_const\n");
 570 #endif
 571               reloc = BFD_RELOC_LO16;
 572             }
 573           else if (strncasecmp (args, "HI(", 3) == 0)
 574             {
 575 #if DEBUG
 576               printf ("reloc_consth\n");
 577 #endif
 578               reloc = BFD_RELOC_HI16;
 579             }
 580
 581           if (*s == '(')
 582             {
 583               operand->X_op = O_constant;
 584 #if 0
 585               operand->X_add_number = 0; /* ??? if enabled load/store offsets
 586                                             are zero.  */
 587 #endif
 588             }
 589           else if (*s == ')')
 590             s += 1;
 591 #if DEBUG
 592           printf ("    default case: operand->X_add_number = %d, *args = %s, *s = %s\n", operand->X_add_number, args, s);
 593 #endif
 594           if (operand->X_op == O_constant)
 595             {
 596               if (reloc == BFD_RELOC_NONE)
 597                 {
 598                   bfd_vma v, mask;
 599
 600                   mask = 0x3ffffff;
 601                   v = abs (operand->X_add_number) & ~ mask;
 602                   if (v)
 603                     as_bad (_("call/jmp target out of range (1)"));
 604                 }
 605
 606               if (reloc == BFD_RELOC_HI16)
 607                 operand->X_add_number = ((operand->X_add_number >> 16) & 0xffff);
 608
 609               the_insn.pcrel = 0;
 610               encode (insn, &opcode, operand->X_add_number, *args);
 611  /*             the_insn.reloc = BFD_RELOC_NONE; */
 612               continue;
 613             }
 614
 615           if (reloc == BFD_RELOC_NONE)
 616             the_insn.reloc = BFD_RELOC_32_GOT_PCREL;
 617           else
 618             the_insn.reloc = reloc;
 619
 620           /* the_insn.reloc = insn->reloc;  */
 621 #if DEBUG
 622           printf ("    reloc sym=%d\n", the_insn.reloc);
 623           printf ("    BFD_RELOC_NONE=%d\n", BFD_RELOC_NONE);
 624 #endif
 625           the_insn.exp = *operand;
 626
 627           /*  the_insn.reloc_offset = 1;  */
 628           the_insn.pcrel = 1; /* Assume PC-relative jump.  */
 629
 630           /* FIXME-SOON, Do we figure out whether abs later, after
 631              know sym val?  */
 632           if (reloc == BFD_RELOC_LO16 || reloc == BFD_RELOC_HI16)
 633             the_insn.pcrel = 0;
 634
 635           encode (insn, &opcode, operand->X_add_number, *args);
 636           continue;
 637         }
 638
 639       /* Types or values of args don't match.  */
 640       as_bad (_("invalid operands"));
 641       return;
 642     }
 643 }
 644
 645 #else
 646
 647 static void
 648 machine_ip (str)
 649      char *str;
 650 {
 651   char *s;
 652   const char *args;
 653   const struct machine_opcode *insn;
 654   char *argsStart;
 655   unsigned long opcode;
 656   expressionS the_operand;
 657   expressionS *operand = &the_operand;
 658   unsigned int regno;
 659   int reloc = NO_RELOC;
 660
 661 #if DEBUG
 662   printf ("machine_ip(%s)\n", str);
 663 #endif
 664
 665   s = str;
 666   for (; ISALNUM (*s) || *s == '.'; ++s)
 667     if (ISUPPER (*s))
 668       *s = TOLOWER (*s);
 669
 670   switch (*s)
 671     {
 672     case '\0':
 673       break;
 674
 675     case ' ':     /* FIXME-SOMEDAY more whitespace.  */
 676       *s++ = '\0';
 677       break;
 678
 679     default:
 680       as_bad (_("unknown opcode1: `%s'"), str);
 681       return;
 682     }
 683
 684   if ((insn = (struct machine_opcode *) hash_find (op_hash, str)) == NULL)
 685     {
 686       as_bad (_("unknown opcode2 `%s'."), str);
 687       return;
 688     }
 689
 690   argsStart = s;
 691   opcode = 0;
 692   memset (&the_insn, '\0', sizeof (the_insn));
 693   the_insn.reloc = NO_RELOC;
 694
 695   reloc = NO_RELOC;
 696
 697   /* Build the opcode, checking as we go to make sure that the
 698      operands match.
 699
 700      If an operand matches, we modify the_insn or opcode appropriately,
 701      and do a "continue".  If an operand fails to match, we "break".  */
 702   if (insn->args[0] != '\0')
 703     /* Prime the pump.  */
 704     s = parse_operand (s, operand,
 705                        insn->args[0] == 'I'
 706                        || strcmp (insn->name, "l.nop") == 0);
 707
 708   for (args = insn->args;; ++args)
 709     {
 710 #if DEBUG
 711       printf ("  args = %s\n", args);
 712 #endif
 713       switch (*args)
 714         {
 715         case '\0':    /* End of args.  */
 716           /* We have have 0 args, do the bazoooka!  */
 717           if (args == insn->args)
 718             encode (insn, &opcode, 0, 0);
 719
 720           if (*s == '\0')
 721             {
 722               /* We are truly done.  */
 723               the_insn.opcode = opcode;
 724               if (check_invalid_opcode (opcode))
 725                 as_bad (_("instruction not allowed: %s"), str);
 726               return;
 727             }
 728           as_bad (_("too many operands: %s"), s);
 729           break;
 730
 731         case ',':   /* Must match a comma.  */
 732           if (*s++ == ',')
 733             {
 734               reloc = NO_RELOC;
 735
 736               /* Parse next operand.  */
 737               s = parse_operand (s, operand, args[1] == 'I');
 738 #if DEBUG
 739               printf ("    ',' case: operand->X_add_number = %d, *args = %s, *s = %s\n",
 740                       operand->X_add_number, args, s);
 741 #endif
 742               continue;
 743             }
 744           break;
 745
 746         case '(':   /* Must match a (.  */
 747           s = parse_operand (s, operand, args[1] == 'I');
 748           continue;
 749
 750         case ')':   /* Must match a ).  */
 751           continue;
 752
 753         case 'r':   /* A general register.  */
 754           args++;
 755
 756           if (operand->X_op != O_register)
 757             break;    /* Only registers.  */
 758
 759           know (operand->X_add_symbol == 0);
 760           know (operand->X_op_symbol == 0);
 761           regno = operand->X_add_number;
 762           encode (insn, &opcode, regno, *args);
 763 #if DEBUG
 764           printf ("    r: operand->X_op = %d\n", operand->X_op);
 765 #endif
 766           continue;
 767
 768         default:
 769           /* if (! ISALPHA (*args))
 770                break;  */   /* Only immediate values.  */
 771
 772           if (mask_or_shift)
 773             {
 774 #if DEBUG
 775               printf ("mask_or_shift = %d\n", mask_or_shift);
 776 #endif
 777               reloc = mask_or_shift;
 778             }
 779           mask_or_shift = 0;
 780
 781           if (strncasecmp (args, "LO(", 3) == 0)
 782             {
 783 #if DEBUG
 784               printf ("reloc_const\n");
 785 #endif
 786               reloc = RELOC_CONST;
 787             }
 788           else if (strncasecmp (args, "HI(", 3) == 0)
 789             {
 790 #if DEBUG
 791               printf ("reloc_consth\n");
 792 #endif
 793               reloc = RELOC_CONSTH;
 794             }
 795
 796           if (*s == '(')
 797             {
 798               operand->X_op = O_constant;
 799 #if 0
 800               operand->X_add_number = 0; /* ??? if enabled load/store offsets
 801                                             are zero.  */
 802 #endif
 803             }
 804           else if (*s == ')')
 805             s += 1;
 806 #if DEBUG
 807           printf ("    default case: operand->X_add_number = %d, *args = %s, *s = %s\n",
 808                   operand->X_add_number, args, s);
 809 #endif
 810           if (operand->X_op == O_constant)
 811             {
 812               if (reloc == NO_RELOC)
 813                 {
 814                   unsigned long v, mask;
 815
 816                   mask = 0x3ffffff;
 817                   v = abs (operand->X_add_number) & ~ mask;
 818                   if (v)
 819                     as_bad (_("call/jmp target out of range (1)"));
 820                 }
 821
 822               if (reloc == RELOC_CONSTH)
 823                 operand->X_add_number = ((operand->X_add_number>>16) & 0xffff);
 824
 825               the_insn.pcrel = 0;
 826               encode (insn, &opcode, operand->X_add_number, *args);
 827               /* the_insn.reloc = NO_RELOC; */
 828               continue;
 829             }
 830
 831           if (reloc == NO_RELOC)
 832             the_insn.reloc = RELOC_JUMPTARG;
 833           else
 834             the_insn.reloc = reloc;
 835 #if DEBUG
 836           printf ("    reloc sym=%d\n", the_insn.reloc);
 837           printf ("    NO_RELOC=%d\n", NO_RELOC);
 838 #endif
 839           the_insn.exp = *operand;
 840
 841           /*  the_insn.reloc_offset = 1;  */
 842           the_insn.pcrel = 1; /* Assume PC-relative jump.  */
 843
 844           /* FIXME-SOON, Do we figure out whether abs later, after
 845              know sym val?  */
 846           if (reloc == RELOC_CONST || reloc == RELOC_CONSTH)
 847             the_insn.pcrel = 0;
 848
 849           encode (insn, &opcode, operand->X_add_number, *args);
 850           continue;
 851         }
 852
 853       /* Types or values of args don't match.  */
 854       as_bad (_("invalid operands"));
 855       return;
 856     }
 857 }
 858 #endif
 859
 860 /* This is identical to the md_atof in m68k.c.  I think this is right,
 861    but I'm not sure.
 862
 863    Turn a string in input_line_pointer into a floating point constant
 864    of type type, and store the appropriate bytes in *litP.  The number
 865    of LITTLENUMS emitted is stored in *sizeP .  An error message is
 866    returned, or NULL on OK.  */
 867
 868 /* Equal to MAX_PRECISION in atof-ieee.c.  */
 869 #define MAX_LITTLENUMS 6
 870
 871 char *
 872 md_atof (type, litP, sizeP)
 873      char   type;
 874      char * litP;
 875      int *  sizeP;
 876 {
 877   int prec;
 878   LITTLENUM_TYPE words[MAX_LITTLENUMS];
 879   LITTLENUM_TYPE *wordP;
 880   char *t;
 881
 882   switch (type)
 883     {
 884     case 'f':
 885     case 'F':
 886     case 's':
 887     case 'S':
 888       prec = 2;
 889       break;
 890
 891     case 'd':
 892     case 'D':
 893     case 'r':
 894     case 'R':
 895       prec = 4;
 896       break;
 897
 898     case 'x':
 899     case 'X':
 900       prec = 6;
 901       break;
 902
 903     case 'p':
 904     case 'P':
 905       prec = 6;
 906       break;
 907
 908     default:
 909       *sizeP = 0;
 910       return _("Bad call to MD_ATOF()");
 911     }
 912
 913   t = atof_ieee (input_line_pointer, type, words);
 914   if (t)
 915     input_line_pointer = t;
 916
 917   *sizeP = prec * sizeof (LITTLENUM_TYPE);
 918
 919   for (wordP = words; prec--;)
 920     {
 921       md_number_to_chars (litP, (valueT) (*wordP++), sizeof (LITTLENUM_TYPE));
 922       litP += sizeof (LITTLENUM_TYPE);
 923     }
 924
 925   return NULL;
 926 }
 927
 928 /* Write out big-endian.  */
 929
 930 void
 931 md_number_to_chars (buf, val, n)
 932      char *buf;
 933      valueT val;
 934      int n;
 935 {
 936   number_to_chars_bigendian (buf, val, n);
 937 }
 938
 939 #ifdef BFD_ASSEMBLER
 940 void
 941 md_apply_fix3 (fixP, val, seg)
 942      fixS *   fixP;
 943      valueT * val;
 944      segT     seg ATTRIBUTE_UNUSED;
 945 {
 946   char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
 947   long t_val;
 948
 949   t_val = (long) *val;
 950
 951 #if DEBUG
 952   printf ("md_apply_fix val:%x\n", t_val);
 953 #endif
 954
 955   fixP->fx_addnumber = t_val; /* Remember value for emit_reloc.  */
 956
 957   know (fixP->fx_size == 4);
 958   know (fixP->fx_r_type < BFD_RELOC_NONE);
 959
 960   switch (fixP->fx_r_type)
 961     {
 962     case BFD_RELOC_32:      /* XXXXXXXX pattern in a word.  */
 963 #if DEBUG
 964       printf ("reloc_const: val=%x\n", t_val);
 965 #endif
 966       buf[0] = t_val >> 24;
 967       buf[1] = t_val >> 16;
 968       buf[2] = t_val >> 8;
 969       buf[3] = t_val;
 970       break;
 971
 972     case BFD_RELOC_16:      /* XXXX0000 pattern in a word.  */
 973 #if DEBUG
 974       printf ("reloc_const: val=%x\n", t_val);
 975 #endif
 976       buf[0] = t_val >> 8;
 977       buf[1] = t_val;
 978       break;
 979
 980     case BFD_RELOC_8:      /* XX000000 pattern in a word.  */
 981 #if DEBUG
 982       printf ("reloc_const: val=%x\n", t_val);
 983 #endif
 984       buf[0] = t_val;
 985       break;
 986
 987     case BFD_RELOC_LO16:      /* 0000XXXX pattern in a word.  */
 988 #if DEBUG
 989       printf ("reloc_const: val=%x\n", t_val);
 990 #endif
 991       buf[2] = t_val >> 8;  /* Holds bits 0000XXXX.  */
 992       buf[3] = t_val;
 993       break;
 994
 995     case BFD_RELOC_HI16:    /* 0000XXXX pattern in a word.  */
 996 #if DEBUG
 997       printf ("reloc_consth: val=%x\n", t_val);
 998 #endif
 999       buf[2] = t_val >> 24; /* Holds bits XXXX0000.  */
1000       buf[3] = t_val >> 16;
1001       break;
1002
1003     case BFD_RELOC_32_GOT_PCREL:  /* 0000XXXX pattern in a word.  */
1004       if (!fixP->fx_done)
1005         {
1006           /* The linker tries to support both AMD and old GNU style
1007              R_IREL relocs.  That means that if the addend is exactly
1008              the negative of the address within the section, the
1009              linker will not handle it correctly.  */
1010 #if 0
1011           if (fixP->fx_pcrel
1012               && t_val != 0
1013               && t_val == - (fixP->fx_frag->fr_address + fixP->fx_where))
1014             as_bad_where
1015               (fixP->fx_file, fixP->fx_line,
1016                _("the linker will not handle this relocation correctly (1)"));
1017 #endif
1018         }
1019       else if (fixP->fx_pcrel)
1020         {
1021           long v = t_val >> 28;
1022
1023           if (v != 0 && v != -1)
1024             as_bad_where (fixP->fx_file, fixP->fx_line,
1025                           _("call/jmp target out of range (2)"));
1026         }
1027       else
1028         /* This case was supposed to be handled in machine_ip.  */
1029         abort ();
1030
1031       buf[0] |= (t_val >> 26) & 0x03; /* Holds bits 0FFFFFFC of address.  */
1032       buf[1] = t_val >> 18;
1033       buf[2] = t_val >> 10;
1034       buf[3] = t_val >> 2;
1035       break;
1036
1037     case BFD_RELOC_VTABLE_INHERIT:
1038     case BFD_RELOC_VTABLE_ENTRY:
1039       fixP->fx_done = 0;
1040       break;
1041
1042     case BFD_RELOC_NONE:
1043     default:
1044       as_bad (_("bad relocation type: 0x%02x"), fixP->fx_r_type);
1045       break;
1046     }
1047
1048   if (fixP->fx_addsy == (symbolS *) NULL)
1049     fixP->fx_done = 1;
1050 }
1051 #else
1052 void
1053 md_apply_fix3 (fixP, valP, seg)
1054      fixS *fixP;
1055      valueT *valP;
1056      segT seg ATTRIBUTE_UNUSED;
1057 {
1058   long val = *valP;
1059   char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
1060
1061 #if DEBUG
1062   printf ("md_apply_fix val:%x\n", val);
1063 #endif
1064
1065   fixP->fx_addnumber = val; /* Remember value for emit_reloc.  */
1066
1067   know (fixP->fx_size == 4);
1068   know (fixP->fx_r_type < NO_RELOC);
1069
1070   /* This is a hack.  There should be a better way to handle this.  */
1071   if (fixP->fx_r_type == RELOC_WDISP30 && fixP->fx_addsy)
1072     val += fixP->fx_where + fixP->fx_frag->fr_address;
1073
1074   switch (fixP->fx_r_type)
1075     {
1076     case RELOC_32:
1077       buf[0] = val >> 24;
1078       buf[1] = val >> 16;
1079       buf[2] = val >> 8;
1080       buf[3] = val;
1081       break;
1082
1083     case RELOC_8:
1084       buf[0] = val;
1085       break;
1086
1087     case RELOC_WDISP30:
1088       val = (val >> 2) + 1;
1089       buf[0] |= (val >> 24) & 0x3f;
1090       buf[1] = (val >> 16);
1091       buf[2] = val >> 8;
1092       buf[3] = val;
1093       break;
1094
1095     case RELOC_HI22:
1096       buf[1] |= (val >> 26) & 0x3f;
1097       buf[2] = val >> 18;
1098       buf[3] = val >> 10;
1099       break;
1100
1101     case RELOC_LO10:
1102       buf[2] |= (val >> 8) & 0x03;
1103       buf[3] = val;
1104       break;
1105
1106     case RELOC_BASE13:
1107       buf[2] |= (val >> 8) & 0x1f;
1108       buf[3] = val;
1109       break;
1110
1111     case RELOC_WDISP22:
1112       val = (val >> 2) + 1;
1113       /* FALLTHROUGH */
1114     case RELOC_BASE22:
1115       buf[1] |= (val >> 16) & 0x3f;
1116       buf[2] = val >> 8;
1117       buf[3] = val;
1118       break;
1119
1120     case RELOC_JUMPTARG:  /* 0000XXXX pattern in a word.  */
1121       if (!fixP->fx_done)
1122         {
1123           /* The linker tries to support both AMD and old GNU style
1124              R_IREL relocs.  That means that if the addend is exactly
1125              the negative of the address within the section, the
1126              linker will not handle it correctly.  */
1127 #if 0
1128           if (fixP->fx_pcrel
1129               && val != 0
1130               && val == - (fixP->fx_frag->fr_address + fixP->fx_where))
1131             as_bad_where
1132               (fixP->fx_file, fixP->fx_line,
1133                _("the linker will not handle this relocation correctly (1)"));
1134 #endif
1135         }
1136       else if (fixP->fx_pcrel)
1137         {
1138           long v = val >> 28;
1139 #if 1
1140           if (v != 0 && v != -1)
1141             as_bad_where (fixP->fx_file, fixP->fx_line,
1142                           _("call/jmp target out of range (2)"));
1143 #endif
1144         }
1145       else
1146         /* This case was supposed to be handled in machine_ip.  */
1147         abort ();
1148
1149       buf[0] |= (val >> 26) & 0x03; /* Holds bits 0FFFFFFC of address.  */
1150       buf[1] = val >> 18;
1151       buf[2] = val >> 10;
1152       buf[3] = val >> 2;
1153       break;
1154
1155     case RELOC_CONST:     /* 0000XXXX pattern in a word.  */
1156 #if DEBUG
1157       printf ("reloc_const: val=%x\n", val);
1158 #endif
1159       buf[2] = val >> 8;  /* Holds bits 0000XXXX.  */
1160       buf[3] = val;
1161       break;
1162
1163     case RELOC_CONSTH:    /* 0000XXXX pattern in a word.  */
1164 #if DEBUG
1165       printf ("reloc_consth: val=%x\n", val);
1166 #endif
1167       buf[2] = val >> 24; /* Holds bits XXXX0000.  */
1168       buf[3] = val >> 16;
1169       break;
1170
1171     case BFD_RELOC_VTABLE_INHERIT:
1172     case BFD_RELOC_VTABLE_ENTRY:
1173       fixP->fx_done = 0;
1174       break;
1175
1176     case NO_RELOC:
1177     default:
1178       as_bad (_("bad relocation type: 0x%02x"), fixP->fx_r_type);
1179       break;
1180     }
1181
1182   if (fixP->fx_addsy == (symbolS *) NULL)
1183     fixP->fx_done = 1;
1184 }
1185 #endif
1186
1187 #ifdef OBJ_COFF
1188 short
1189 tc_coff_fix2rtype (fixP)
1190      fixS *fixP;
1191 {
1192 #if DEBUG
1193   printf ("tc_coff_fix2rtype\n");
1194 #endif
1195
1196   switch (fixP->fx_r_type)
1197     {
1198     case RELOC_32:
1199       return (R_WORD);
1200     case RELOC_8:
1201       return (R_BYTE);
1202     case RELOC_CONST:
1203       return (R_ILOHALF);
1204     case RELOC_CONSTH:
1205       return (R_IHIHALF);
1206     case RELOC_JUMPTARG:
1207       return (R_IREL);
1208     default:
1209       printf ("need %d\n", fixP->fx_r_type);
1210       abort ();
1211     }
1212
1213   return 0;
1214 }
1215
1216 #endif /* OBJ_COFF */
1217
1218 /* Should never be called for or32.  */
1219
1220 void
1221 md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
1222      char *    ptr       ATTRIBUTE_UNUSED;
1223      addressT  from_addr ATTRIBUTE_UNUSED;
1224      addressT  to_addr   ATTRIBUTE_UNUSED;
1225      fragS *   frag      ATTRIBUTE_UNUSED;
1226      symbolS * to_symbol ATTRIBUTE_UNUSED;
1227 {
1228   as_fatal ("or32_create_short_jmp\n");
1229 }
1230
1231 /* Should never be called for or32.  */
1232
1233 #ifndef BFD_ASSEMBLER
1234 void
1235 md_convert_frag (headers, seg, fragP)
1236      object_headers * headers ATTRIBUTE_UNUSED;
1237      segT             seg     ATTRIBUTE_UNUSED;
1238      register fragS * fragP   ATTRIBUTE_UNUSED;
1239 {
1240   as_fatal ("or32_convert_frag\n");
1241 }
1242
1243 #else
1244 void
1245 md_convert_frag (headers, seg, fragP)
1246      bfd *   headers ATTRIBUTE_UNUSED;
1247      segT    seg     ATTRIBUTE_UNUSED;
1248      fragS * fragP   ATTRIBUTE_UNUSED;
1249 {
1250   as_fatal ("or32_convert_frag\n");
1251 }
1252 #endif
1253
1254 /* Should never be called for or32.  */
1255
1256 void
1257 md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol)
1258      char *    ptr       ATTRIBUTE_UNUSED;
1259      addressT  from_addr ATTRIBUTE_UNUSED;
1260      addressT  to_addr   ATTRIBUTE_UNUSED;
1261      fragS *   frag      ATTRIBUTE_UNUSED;
1262      symbolS * to_symbol ATTRIBUTE_UNUSED;
1263 {
1264   as_fatal ("or32_create_long_jump\n");
1265 }
1266
1267 /* Should never be called for or32.  */
1268
1269 int
1270 md_estimate_size_before_relax (fragP, segtype)
1271      fragS * fragP   ATTRIBUTE_UNUSED;
1272      segT    segtype ATTRIBUTE_UNUSED;
1273 {
1274   as_fatal ("or32_estimate_size_before_relax\n");
1275   return 0;
1276 }
1277
1278 /* Translate internal representation of relocation info to target format.
1279
1280    On sparc/29k: first 4 bytes are normal unsigned long address, next three
1281    bytes are index, most sig. byte first.  Byte 7 is broken up with
1282    bit 7 as external, bits 6 & 5 unused, and the lower
1283    five bits as relocation type.  Next 4 bytes are long addend.  */
1284 /* Thanx and a tip of the hat to Michael Bloom, mb@ttidca.tti.com.  */
1285
1286 #ifdef OBJ_AOUT
1287 void
1288 tc_aout_fix_to_chars (where, fixP, segment_address_in_file)
1289      char *where;
1290      fixS *fixP;
1291      relax_addressT segment_address_in_file;
1292 {
1293   long r_symbolnum;
1294
1295 #if DEBUG
1296   printf ("tc_aout_fix_to_chars\n");
1297 #endif
1298
1299   know (fixP->fx_r_type < BFD_RELOC_NONE);
1300   know (fixP->fx_addsy != NULL);
1301
1302   md_number_to_chars
1303     (where,
1304      fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file,
1305      4);
1306
1307   r_symbolnum = (S_IS_DEFINED (fixP->fx_addsy)
1308      ? S_GET_TYPE (fixP->fx_addsy)
1309      : fixP->fx_addsy->sy_number);
1310
1311   where[4] = (r_symbolnum >> 16) & 0x0ff;
1312   where[5] = (r_symbolnum >> 8) & 0x0ff;
1313   where[6] = r_symbolnum & 0x0ff;
1314   where[7] = (((!S_IS_DEFINED (fixP->fx_addsy)) << 7) & 0x80) | (0 & 0x60) | (fixP->fx_r_type & 0x1F);
1315
1316   /* Also easy.  */
1317   md_number_to_chars (&where[8], fixP->fx_addnumber, 4);
1318 }
1319
1320 #endif /* OBJ_AOUT */
1321 \f
1322 const char *md_shortopts = "";
1323
1324 struct option md_longopts[] =
1325   {
1326     { NULL, no_argument, NULL, 0 }
1327   };
1328 size_t md_longopts_size = sizeof (md_longopts);
1329
1330 int
1331 md_parse_option (c, arg)
1332      int    c   ATTRIBUTE_UNUSED;
1333      char * arg ATTRIBUTE_UNUSED;
1334 {
1335   return 0;
1336 }
1337
1338 void
1339 md_show_usage (stream)
1340      FILE * stream ATTRIBUTE_UNUSED;
1341 {
1342 }
1343 \f
1344 /* This is called when a line is unrecognized.  This is used to handle
1345    definitions of or32 style local labels.  */
1346
1347 int
1348 or32_unrecognized_line (c)
1349      int c;
1350 {
1351   int lab;
1352   char *s;
1353
1354   if (c != '$'
1355       || ! ISDIGIT ((unsigned char) input_line_pointer[0]))
1356     return 0;
1357
1358   s = input_line_pointer;
1359
1360   lab = 0;
1361   while (ISDIGIT ((unsigned char) *s))
1362     {
1363       lab = lab * 10 + *s - '0';
1364       ++s;
1365     }
1366
1367   if (*s != ':')
1368     /* Not a label definition.  */
1369     return 0;
1370
1371   if (dollar_label_defined (lab))
1372     {
1373       as_bad (_("label \"$%d\" redefined"), lab);
1374       return 0;
1375     }
1376
1377   define_dollar_label (lab);
1378   colon (dollar_label_name (lab, 0));
1379   input_line_pointer = s + 1;
1380
1381   return 1;
1382 }
1383
1384 #ifndef BFD_ASSEMBLER
1385 /* Record a fixup for a cons expression.  */
1386 /*
1387   void
1388 or32_cons_fix_new (frag, where, nbytes, exp)
1389      fragS *frag;
1390      int where;
1391      int nbytes;
1392      expressionS *exp;
1393 {
1394   fix_new_exp (frag, where, nbytes, exp, 0,
1395                    nbytes == 5 ? RELOC_32
1396                    : nbytes == 2 ? RELOC_16
1397                    : RELOC_8);
1398 }
1399 void
1400 tc_aout_pre_write_hook ()
1401 {
1402 #if DEBUG
1403   printf ("In tc_aout_pre_write_hook()\n");
1404 #endif
1405 }
1406 */
1407 #endif
1408
1409 /* Default the values of symbols known that should be "predefined".  We
1410    don't bother to predefine them unless you actually use one, since there
1411    are a lot of them.  */
1412
1413 symbolS *
1414 md_undefined_symbol (name)
1415      char *name ATTRIBUTE_UNUSED;
1416 {
1417 #ifndef BFD_ASSEMBLER
1418   long regnum;
1419   char testbuf[5 + /*SLOP*/ 5];
1420
1421 #if DEBUG
1422   printf ("md_undefined_symbol(%s)\n", name);
1423 #endif
1424
1425   /* Register name.  */
1426   if (name[0] == 'r' || name[0] == 'R' || name[0] == 'a' || name[0] == 'b')
1427     {
1428       /* Parse the number, make sure it has no extra zeroes or
1429          trailing chars.  */
1430       regnum = atol (& name[1]);
1431
1432       if (regnum > 31)
1433         as_fatal (_("register out of range"));
1434
1435       sprintf (testbuf, "%ld", regnum);
1436
1437       if (strcmp (testbuf, &name[1]) != 0)
1438         return NULL;  /* gr007 or lr7foo or whatever.  */
1439
1440       /* We have a wiener!  Define and return a new symbol for it.  */
1441       return (symbol_new (name, SEG_REGISTER, (valueT) regnum,
1442                           &zero_address_frag));
1443     }
1444 #endif
1445   return NULL;
1446 }
1447
1448 /* Parse an operand that is machine-specific.  */
1449
1450 void
1451 md_operand (expressionP)
1452      expressionS *expressionP;
1453 {
1454 #if DEBUG
1455   printf ("  md_operand(input_line_pointer = %s)\n", input_line_pointer);
1456 #endif
1457
1458   if (input_line_pointer[0] == REGISTER_PREFIX && input_line_pointer[1] == 'r')
1459     {
1460       /* We have a numeric register expression.  No biggy.  */
1461       input_line_pointer += 2;  /* Skip %r */
1462       (void) expression (expressionP);
1463
1464       if (expressionP->X_op != O_constant
1465           || expressionP->X_add_number > 255)
1466         as_bad (_("Invalid expression after %%%%\n"));
1467       expressionP->X_op = O_register;
1468     }
1469   else if (input_line_pointer[0] == '&')
1470     {
1471       /* We are taking the 'address' of a register...this one is not
1472          in the manual, but it *is* in traps/fpsymbol.h!  What they
1473          seem to want is the register number, as an absolute number.  */
1474       input_line_pointer++; /* Skip & */
1475       (void) expression (expressionP);
1476
1477       if (expressionP->X_op != O_register)
1478         as_bad (_("invalid register in & expression"));
1479       else
1480         expressionP->X_op = O_constant;
1481     }
1482   else if (input_line_pointer[0] == '$'
1483            && ISDIGIT ((unsigned char) input_line_pointer[1]))
1484     {
1485       long lab;
1486       char *name;
1487       symbolS *sym;
1488
1489       /* This is a local label.  */
1490       ++input_line_pointer;
1491       lab = (long) get_absolute_expression ();
1492
1493       if (dollar_label_defined (lab))
1494         {
1495           name = dollar_label_name (lab, 0);
1496           sym = symbol_find (name);
1497         }
1498       else
1499         {
1500           name = dollar_label_name (lab, 1);
1501           sym = symbol_find_or_make (name);
1502         }
1503
1504       expressionP->X_op = O_symbol;
1505       expressionP->X_add_symbol = sym;
1506       expressionP->X_add_number = 0;
1507     }
1508   else if (input_line_pointer[0] == '$')
1509     {
1510       char *s;
1511       char type;
1512       int fieldnum, fieldlimit;
1513       LITTLENUM_TYPE floatbuf[8];
1514
1515       /* $float(), $doubleN(), or $extendN() convert floating values
1516          to integers.  */
1517       s = input_line_pointer;
1518
1519       ++s;
1520
1521       fieldnum = 0;
1522       if (strncmp (s, "double", sizeof "double" - 1) == 0)
1523         {
1524           s += sizeof "double" - 1;
1525           type = 'd';
1526           fieldlimit = 2;
1527         }
1528       else if (strncmp (s, "float", sizeof "float" - 1) == 0)
1529         {
1530           s += sizeof "float" - 1;
1531           type = 'f';
1532           fieldlimit = 1;
1533         }
1534       else if (strncmp (s, "extend", sizeof "extend" - 1) == 0)
1535         {
1536           s += sizeof "extend" - 1;
1537           type = 'x';
1538           fieldlimit = 4;
1539         }
1540       else
1541         return;
1542
1543       if (ISDIGIT (*s))
1544         {
1545           fieldnum = *s - '0';
1546           ++s;
1547         }
1548       if (fieldnum >= fieldlimit)
1549         return;
1550
1551       SKIP_WHITESPACE ();
1552       if (*s != '(')
1553         return;
1554       ++s;
1555       SKIP_WHITESPACE ();
1556
1557       s = atof_ieee (s, type, floatbuf);
1558       if (s == NULL)
1559         return;
1560       s = s;
1561
1562       SKIP_WHITESPACE ();
1563       if (*s != ')')
1564         return;
1565       ++s;
1566       SKIP_WHITESPACE ();
1567
1568       input_line_pointer = s;
1569       expressionP->X_op = O_constant;
1570       expressionP->X_unsigned = 1;
1571       expressionP->X_add_number = ((floatbuf[fieldnum * 2]
1572                                     << LITTLENUM_NUMBER_OF_BITS)
1573                                    + floatbuf[fieldnum * 2 + 1]);
1574     }
1575 }
1576
1577 /* Round up a section size to the appropriate boundary.  */
1578
1579 valueT
1580 md_section_align (segment, size)
1581      segT segment ATTRIBUTE_UNUSED;
1582      valueT size ATTRIBUTE_UNUSED;
1583 {
1584   return size;      /* Byte alignment is fine.  */
1585 }
1586
1587 /* Exactly what point is a PC-relative offset relative TO?
1588    On the 29000, they're relative to the address of the instruction,
1589    which we have set up as the address of the fixup too.  */
1590
1591 long
1592 md_pcrel_from (fixP)
1593      fixS *fixP;
1594 {
1595   return fixP->fx_where + fixP->fx_frag->fr_address;
1596 }
1597
1598 /* Generate a reloc for a fixup.  */
1599
1600 #ifdef BFD_ASSEMBLER
1601 arelent *
1602 tc_gen_reloc (seg, fixp)
1603      asection *seg ATTRIBUTE_UNUSED;
1604      fixS *fixp;
1605 {
1606   arelent *reloc;
1607
1608   reloc = (arelent *) xmalloc (sizeof (arelent));
1609   reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
1610   *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
1611   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
1612   /*  reloc->address = fixp->fx_frag->fr_address + fixp->fx_where + fixp->fx_addnumber;*/
1613   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
1614
1615   if (reloc->howto == (reloc_howto_type *) NULL)
1616     {
1617       as_bad_where (fixp->fx_file, fixp->fx_line,
1618                     _("reloc %d not supported by object file format"),
1619                     (int) fixp->fx_r_type);
1620       return NULL;
1621     }
1622
1623   if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
1624     reloc->address = fixp->fx_offset;
1625
1626   reloc->addend = fixp->fx_addnumber;
1627   return reloc;
1628 }
1629 #endif
1630