gas/config/tc-mn10300.c

   1 /* tc-mn10300.c -- Assembler code for the Matsushita 10300
   2
   3    Copyright (C) 1996 Free Software Foundation.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS 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 2, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to
  19    the Free Software Foundation, 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include <stdio.h>
  23 #include <ctype.h>
  24 #include "as.h"
  25 #include "subsegs.h"
  26 #include "opcode/mn10300.h"
  27 \f
  28 /* Structure to hold information about predefined registers.  */
  29 struct reg_name
  30 {
  31   const char *name;
  32   int value;
  33 };
  34
  35 /* Generic assembler global variables which must be defined by all targets. */
  36
  37 /* Characters which always start a comment. */
  38 const char comment_chars[] = "#";
  39
  40 /* Characters which start a comment at the beginning of a line.  */
  41 const char line_comment_chars[] = ";#";
  42
  43 /* Characters which may be used to separate multiple commands on a
  44    single line.  */
  45 const char line_separator_chars[] = ";";
  46
  47 /* Characters which are used to indicate an exponent in a floating
  48    point number.  */
  49 const char EXP_CHARS[] = "eE";
  50
  51 /* Characters which mean that a number is a floating point constant,
  52    as in 0d1.0.  */
  53 const char FLT_CHARS[] = "dD";
  54 \f
  55
  56 /* local functions */
  57 static void mn10300_insert_operand PARAMS ((unsigned long *, unsigned long *,
  58                                             const struct mn10300_operand *,
  59                                             offsetT, char *, unsigned,
  60                                             unsigned));
  61 static unsigned long check_operand PARAMS ((unsigned long,
  62                                             const struct mn10300_operand *,
  63                                             offsetT));
  64 static int reg_name_search PARAMS ((const struct reg_name *, int, const char *));
  65 static boolean register_name PARAMS ((expressionS *expressionP));
  66 static boolean system_register_name PARAMS ((expressionS *expressionP));
  67 static boolean cc_name PARAMS ((expressionS *expressionP));
  68
  69
  70 /* fixups */
  71 #define MAX_INSN_FIXUPS (5)
  72 struct mn10300_fixup
  73 {
  74   expressionS exp;
  75   int opindex;
  76   bfd_reloc_code_real_type reloc;
  77 };
  78 struct mn10300_fixup fixups[MAX_INSN_FIXUPS];
  79 static int fc;
  80 \f
  81 const char *md_shortopts = "";
  82 struct option md_longopts[] = {
  83   {NULL, no_argument, NULL, 0}
  84 };
  85 size_t md_longopts_size = sizeof(md_longopts);
  86
  87 /* The target specific pseudo-ops which we support.  */
  88 const pseudo_typeS md_pseudo_table[] =
  89 {
  90   { NULL,       NULL,           0 }
  91 };
  92
  93 /* Opcode hash table.  */
  94 static struct hash_control *mn10300_hash;
  95
  96 /* This table is sorted. Suitable for searching by a binary search. */
  97 static const struct reg_name data_registers[] =
  98 {
  99   { "d0", 0 },
 100   { "d1", 1 },
 101   { "d2", 2 },
 102   { "d3", 3 },
 103 };
 104 #define DATA_REG_NAME_CNT       (sizeof(data_registers) / sizeof(struct reg_name))
 105
 106 static const struct reg_name address_registers[] =
 107 {
 108   { "a0", 0 },
 109   { "a1", 1 },
 110   { "a2", 2 },
 111   { "a3", 3 },
 112 };
 113 #define ADDRESS_REG_NAME_CNT    (sizeof(address_registers) / sizeof(struct reg_name))
 114
 115 static const struct reg_name other_registers[] =
 116 {
 117   { "mdr", 0 },
 118   { "psw", 0 },
 119   { "sp", 0 },
 120 };
 121 #define OTHER_REG_NAME_CNT      (sizeof(other_registers) / sizeof(struct reg_name))
 122
 123 /* reg_name_search does a binary search of the given register table
 124    to see if "name" is a valid regiter name.  Returns the register
 125    number from the array on success, or -1 on failure. */
 126
 127 static int
 128 reg_name_search (regs, regcount, name)
 129      const struct reg_name *regs;
 130      int regcount;
 131      const char *name;
 132 {
 133   int middle, low, high;
 134   int cmp;
 135
 136   low = 0;
 137   high = regcount - 1;
 138
 139   do
 140     {
 141       middle = (low + high) / 2;
 142       cmp = strcasecmp (name, regs[middle].name);
 143       if (cmp < 0)
 144         high = middle - 1;
 145       else if (cmp > 0)
 146         low = middle + 1;
 147       else
 148           return regs[middle].value;
 149     }
 150   while (low <= high);
 151   return -1;
 152 }
 153
 154
 155 /* Summary of register_name().
 156  *
 157  * in: Input_line_pointer points to 1st char of operand.
 158  *
 159  * out: A expressionS.
 160  *      The operand may have been a register: in this case, X_op == O_register,
 161  *      X_add_number is set to the register number, and truth is returned.
 162  *      Input_line_pointer->(next non-blank) char after operand, or is in
 163  *      its original state.
 164  */
 165 static boolean
 166 data_register_name (expressionP)
 167      expressionS *expressionP;
 168 {
 169   int reg_number;
 170   char *name;
 171   char *start;
 172   char c;
 173
 174   /* Find the spelling of the operand */
 175   start = name = input_line_pointer;
 176
 177   c = get_symbol_end ();
 178   reg_number = reg_name_search (data_registers, DATA_REG_NAME_CNT, name);
 179
 180   /* look to see if it's in the register table */
 181   if (reg_number >= 0)
 182     {
 183       expressionP->X_op = O_register;
 184       expressionP->X_add_number = reg_number;
 185
 186       /* make the rest nice */
 187       expressionP->X_add_symbol = NULL;
 188       expressionP->X_op_symbol = NULL;
 189       *input_line_pointer = c;  /* put back the delimiting char */
 190       return true;
 191     }
 192   else
 193     {
 194       /* reset the line as if we had not done anything */
 195       *input_line_pointer = c;   /* put back the delimiting char */
 196       input_line_pointer = start; /* reset input_line pointer */
 197       return false;
 198     }
 199 }
 200
 201 /* Summary of register_name().
 202  *
 203  * in: Input_line_pointer points to 1st char of operand.
 204  *
 205  * out: A expressionS.
 206  *      The operand may have been a register: in this case, X_op == O_register,
 207  *      X_add_number is set to the register number, and truth is returned.
 208  *      Input_line_pointer->(next non-blank) char after operand, or is in
 209  *      its original state.
 210  */
 211 static boolean
 212 address_register_name (expressionP)
 213      expressionS *expressionP;
 214 {
 215   int reg_number;
 216   char *name;
 217   char *start;
 218   char c;
 219
 220   /* Find the spelling of the operand */
 221   start = name = input_line_pointer;
 222
 223   c = get_symbol_end ();
 224   reg_number = reg_name_search (address_registers, ADDRESS_REG_NAME_CNT, name);
 225
 226   /* look to see if it's in the register table */
 227   if (reg_number >= 0)
 228     {
 229       expressionP->X_op = O_register;
 230       expressionP->X_add_number = reg_number;
 231
 232       /* make the rest nice */
 233       expressionP->X_add_symbol = NULL;
 234       expressionP->X_op_symbol = NULL;
 235       *input_line_pointer = c;  /* put back the delimiting char */
 236       return true;
 237     }
 238   else
 239     {
 240       /* reset the line as if we had not done anything */
 241       *input_line_pointer = c;   /* put back the delimiting char */
 242       input_line_pointer = start; /* reset input_line pointer */
 243       return false;
 244     }
 245 }
 246
 247 /* Summary of register_name().
 248  *
 249  * in: Input_line_pointer points to 1st char of operand.
 250  *
 251  * out: A expressionS.
 252  *      The operand may have been a register: in this case, X_op == O_register,
 253  *      X_add_number is set to the register number, and truth is returned.
 254  *      Input_line_pointer->(next non-blank) char after operand, or is in
 255  *      its original state.
 256  */
 257 static boolean
 258 other_register_name (expressionP)
 259      expressionS *expressionP;
 260 {
 261   int reg_number;
 262   char *name;
 263   char *start;
 264   char c;
 265
 266   /* Find the spelling of the operand */
 267   start = name = input_line_pointer;
 268
 269   c = get_symbol_end ();
 270   reg_number = reg_name_search (other_registers, OTHER_REG_NAME_CNT, name);
 271
 272   /* look to see if it's in the register table */
 273   if (reg_number >= 0)
 274     {
 275       expressionP->X_op = O_register;
 276       expressionP->X_add_number = reg_number;
 277
 278       /* make the rest nice */
 279       expressionP->X_add_symbol = NULL;
 280       expressionP->X_op_symbol = NULL;
 281       *input_line_pointer = c;  /* put back the delimiting char */
 282       return true;
 283     }
 284   else
 285     {
 286       /* reset the line as if we had not done anything */
 287       *input_line_pointer = c;   /* put back the delimiting char */
 288       input_line_pointer = start; /* reset input_line pointer */
 289       return false;
 290     }
 291 }
 292
 293 void
 294 md_show_usage (stream)
 295   FILE *stream;
 296 {
 297   fprintf(stream, "MN10300 options:\n\
 298 none yet\n");
 299 }
 300
 301 int
 302 md_parse_option (c, arg)
 303      int c;
 304      char *arg;
 305 {
 306   return 0;
 307 }
 308
 309 symbolS *
 310 md_undefined_symbol (name)
 311   char *name;
 312 {
 313   return 0;
 314 }
 315
 316 char *
 317 md_atof (type, litp, sizep)
 318   int type;
 319   char *litp;
 320   int *sizep;
 321 {
 322   int prec;
 323   LITTLENUM_TYPE words[4];
 324   char *t;
 325   int i;
 326
 327   switch (type)
 328     {
 329     case 'f':
 330       prec = 2;
 331       break;
 332
 333     case 'd':
 334       prec = 4;
 335       break;
 336
 337     default:
 338       *sizep = 0;
 339       return "bad call to md_atof";
 340     }
 341
 342   t = atof_ieee (input_line_pointer, type, words);
 343   if (t)
 344     input_line_pointer = t;
 345
 346   *sizep = prec * 2;
 347
 348   for (i = prec - 1; i >= 0; i--)
 349     {
 350       md_number_to_chars (litp, (valueT) words[i], 2);
 351       litp += 2;
 352     }
 353
 354   return NULL;
 355 }
 356
 357
 358 void
 359 md_convert_frag (abfd, sec, fragP)
 360   bfd *abfd;
 361   asection *sec;
 362   fragS *fragP;
 363 {
 364   /* printf ("call to md_convert_frag \n"); */
 365   abort ();
 366 }
 367
 368 valueT
 369 md_section_align (seg, addr)
 370      asection *seg;
 371      valueT addr;
 372 {
 373   int align = bfd_get_section_alignment (stdoutput, seg);
 374   return ((addr + (1 << align) - 1) & (-1 << align));
 375 }
 376
 377 void
 378 md_begin ()
 379 {
 380   char *prev_name = "";
 381   register const struct mn10300_opcode *op;
 382
 383   mn10300_hash = hash_new();
 384
 385   /* Insert unique names into hash table.  The MN10300 instruction set
 386      has many identical opcode names that have different opcodes based
 387      on the operands.  This hash table then provides a quick index to
 388      the first opcode with a particular name in the opcode table.  */
 389
 390   op     = mn10300_opcodes;
 391   while (op->name)
 392     {
 393       if (strcmp (prev_name, op->name))
 394         {
 395           prev_name = (char *) op->name;
 396           hash_insert (mn10300_hash, op->name, (char *) op);
 397         }
 398       op++;
 399     }
 400 }
 401
 402 void
 403 md_assemble (str)
 404      char *str;
 405 {
 406   char *s;
 407   struct mn10300_opcode *opcode;
 408   struct mn10300_opcode *next_opcode;
 409   const unsigned char *opindex_ptr;
 410   int next_opindex;
 411   unsigned long insn, extension, size;
 412   char *f;
 413   int i;
 414   int match;
 415   bfd_reloc_code_real_type reloc;
 416
 417   /* Get the opcode.  */
 418   for (s = str; *s != '\0' && ! isspace (*s); s++)
 419     ;
 420   if (*s != '\0')
 421     *s++ = '\0';
 422
 423   /* find the first opcode with the proper name */
 424   opcode = (struct mn10300_opcode *)hash_find (mn10300_hash, str);
 425   if (opcode == NULL)
 426     {
 427       as_bad ("Unrecognized opcode: `%s'", str);
 428       return;
 429     }
 430
 431   str = s;
 432   while (isspace (*str))
 433     ++str;
 434
 435   input_line_pointer = str;
 436
 437   for(;;)
 438     {
 439       const char *errmsg = NULL;
 440       int op_idx;
 441       char *hold;
 442       int extra_shift = 0;
 443
 444       fc = 0;
 445       match = 0;
 446       next_opindex = 0;
 447       insn = opcode->opcode;
 448       extension = 0;
 449       for (op_idx = 1, opindex_ptr = opcode->operands;
 450            *opindex_ptr != 0;
 451            opindex_ptr++, op_idx++)
 452         {
 453           const struct mn10300_operand *operand;
 454           expressionS ex;
 455
 456           if (next_opindex == 0)
 457             {
 458               operand = &mn10300_operands[*opindex_ptr];
 459             }
 460           else
 461             {
 462               operand = &mn10300_operands[next_opindex];
 463               next_opindex = 0;
 464             }
 465
 466           errmsg = NULL;
 467
 468           while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
 469             ++str;
 470
 471           /* Gather the operand. */
 472           hold = input_line_pointer;
 473           input_line_pointer = str;
 474
 475           if (operand->flags & MN10300_OPERAND_PAREN)
 476             {
 477               if (*input_line_pointer != ')' && *input_line_pointer != '(')
 478                 {
 479                   input_line_pointer = hold;
 480                   str = hold;
 481                   goto error;
 482                 }
 483               input_line_pointer++;
 484               goto keep_going;
 485             }
 486           /* See if we can match the operands.  */
 487           else if (operand->flags & MN10300_OPERAND_DREG)
 488             {
 489               if (!data_register_name (&ex))
 490                 {
 491                   input_line_pointer = hold;
 492                   str = hold;
 493                   goto error;
 494                 }
 495             }
 496           else if (operand->flags & MN10300_OPERAND_AREG)
 497             {
 498               if (!address_register_name (&ex))
 499                 {
 500                   input_line_pointer = hold;
 501                   str = hold;
 502                   goto error;
 503                 }
 504             }
 505           else if (operand->flags & MN10300_OPERAND_SP)
 506             {
 507               char *start = input_line_pointer;
 508               char c = get_symbol_end ();
 509
 510               if (strcmp (start, "sp") != 0)
 511                 {
 512                   *input_line_pointer = c;
 513                   input_line_pointer = hold;
 514                   str = hold;
 515                   goto error;
 516                 }
 517               *input_line_pointer = c;
 518               goto keep_going;
 519             }
 520           else if (operand->flags & MN10300_OPERAND_PSW)
 521             {
 522               char *start = input_line_pointer;
 523               char c = get_symbol_end ();
 524
 525               if (strcmp (start, "psw") != 0)
 526                 {
 527                   *input_line_pointer = c;
 528                   input_line_pointer = hold;
 529                   str = hold;
 530                   goto error;
 531                 }
 532               *input_line_pointer = c;
 533               goto keep_going;
 534             }
 535           else if (operand->flags & MN10300_OPERAND_MDR)
 536             {
 537               char *start = input_line_pointer;
 538               char c = get_symbol_end ();
 539
 540               if (strcmp (start, "mdr") != 0)
 541                 {
 542                   *input_line_pointer = c;
 543                   input_line_pointer = hold;
 544                   str = hold;
 545                   goto error;
 546                 }
 547               *input_line_pointer = c;
 548               goto keep_going;
 549             }
 550           else if (data_register_name (&ex))
 551             {
 552               input_line_pointer = hold;
 553               str = hold;
 554               goto error;
 555             }
 556           else if (address_register_name (&ex))
 557             {
 558               input_line_pointer = hold;
 559               str = hold;
 560               goto error;
 561             }
 562           else if (other_register_name (&ex))
 563             {
 564               input_line_pointer = hold;
 565               str = hold;
 566               goto error;
 567             }
 568           else if (*str == ')' || *str == '(')
 569             {
 570               input_line_pointer = hold;
 571               str = hold;
 572               goto error;
 573             }
 574           else
 575             {
 576               expression (&ex);
 577             }
 578
 579           switch (ex.X_op)
 580             {
 581             case O_illegal:
 582               errmsg = "illegal operand";
 583               goto error;
 584             case O_absent:
 585               errmsg = "missing operand";
 586               goto error;
 587             case O_register:
 588               if (operand->flags & (MN10300_OPERAND_DREG
 589                                     | MN10300_OPERAND_AREG) == 0)
 590                 {
 591                   input_line_pointer = hold;
 592                   str = hold;
 593                   goto error;
 594                 }
 595
 596               if (opcode->format == FMT_D1 || opcode->format == FMT_S1)
 597                 extra_shift = 8;
 598               else if (opcode->format == FMT_D2 || opcode->format == FMT_D4
 599                        || opcode->format == FMT_S2 || opcode->format == FMT_S4
 600                        || opcode->format == FMT_S6 || opcode->format == FMT_D5)
 601                 extra_shift = 16;
 602               else
 603                 extra_shift = 0;
 604
 605               mn10300_insert_operand (&insn, &extension, operand,
 606                                       ex.X_add_number, (char *) NULL,
 607                                       0, extra_shift);
 608
 609               break;
 610
 611             case O_constant:
 612               /* If this operand can be promoted, and it doesn't
 613                  fit into the allocated bitfield for this insn,
 614                  then promote it (ie this opcode does not match).  */
 615               if (operand->flags & MN10300_OPERAND_PROMOTE
 616                   && ! check_operand (insn, operand, ex.X_add_number))
 617                 {
 618                   input_line_pointer = hold;
 619                   str = hold;
 620                   goto error;
 621                 }
 622
 623               mn10300_insert_operand (&insn, &extension, operand,
 624                                       ex.X_add_number, (char *) NULL,
 625                                       0, 0);
 626               break;
 627
 628             default:
 629               /* If this operand can be promoted, then this opcode didn't
 630                  match since we can't know if it needed promotion!  */
 631               if (operand->flags & MN10300_OPERAND_PROMOTE)
 632                 {
 633                   input_line_pointer = hold;
 634                   str = hold;
 635                   goto error;
 636                 }
 637
 638               /* We need to generate a fixup for this expression.  */
 639               if (fc >= MAX_INSN_FIXUPS)
 640                 as_fatal ("too many fixups");
 641               fixups[fc].exp = ex;
 642               fixups[fc].opindex = *opindex_ptr;
 643               fixups[fc].reloc = BFD_RELOC_UNUSED;
 644               ++fc;
 645               break;
 646             }
 647
 648 keep_going:
 649           str = input_line_pointer;
 650           input_line_pointer = hold;
 651
 652           while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
 653             ++str;
 654
 655         }
 656
 657       /* Make sure we used all the operands!  */
 658       if (*str != ',')
 659         match = 1;
 660
 661     error:
 662       if (match == 0)
 663         {
 664           next_opcode = opcode + 1;
 665           if (next_opcode->opcode != 0 && !strcmp(next_opcode->name, opcode->name))
 666             {
 667               opcode = next_opcode;
 668               continue;
 669             }
 670
 671           as_bad ("%s", errmsg);
 672           return;
 673         }
 674       break;
 675     }
 676
 677   while (isspace (*str))
 678     ++str;
 679
 680   if (*str != '\0')
 681     as_bad ("junk at end of line: `%s'", str);
 682
 683   input_line_pointer = str;
 684
 685   /* Determine the size of the instruction.  */
 686   if (opcode->format == FMT_S0)
 687     size = 1;
 688
 689   if (opcode->format == FMT_S1 || opcode->format == FMT_D0)
 690     size = 2;
 691
 692   if (opcode->format == FMT_S2 || opcode->format == FMT_D1)
 693     size = 3;
 694
 695   if (opcode->format == FMT_S4)
 696     size = 5;
 697
 698   if (opcode->format == FMT_S6 || opcode->format == FMT_D5)
 699     size = 7;
 700
 701   if (opcode->format == FMT_D2)
 702     size = 4;
 703
 704   if (opcode->format == FMT_D4)
 705     size = 6;
 706
 707   /* Write out the instruction.  */
 708
 709   f = frag_more (size);
 710   number_to_chars_bigendian (f, insn, size > 4 ? 4 : size);
 711   if (size > 4)
 712     number_to_chars_bigendian (f + 4, extension, size - 4);
 713 }
 714
 715
 716 /* if while processing a fixup, a reloc really needs to be created */
 717 /* then it is done here */
 718
 719 arelent *
 720 tc_gen_reloc (seg, fixp)
 721      asection *seg;
 722      fixS *fixp;
 723 {
 724   arelent *reloc;
 725   reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent));
 726   reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym;
 727   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
 728   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
 729   if (reloc->howto == (reloc_howto_type *) NULL)
 730     {
 731       as_bad_where (fixp->fx_file, fixp->fx_line,
 732                     "reloc %d not supported by object file format", (int)fixp->fx_r_type);
 733       return NULL;
 734     }
 735   reloc->addend = fixp->fx_addnumber;
 736   /*  printf("tc_gen_reloc: addr=%x  addend=%x\n", reloc->address, reloc->addend); */
 737   return reloc;
 738 }
 739
 740 int
 741 md_estimate_size_before_relax (fragp, seg)
 742      fragS *fragp;
 743      asection *seg;
 744 {
 745   return 0;
 746 }
 747
 748 long
 749 md_pcrel_from (fixp)
 750      fixS *fixp;
 751 {
 752   if (fixp->fx_addsy != (symbolS *) NULL && ! S_IS_DEFINED (fixp->fx_addsy))
 753     {
 754       /* The symbol is undefined.  Let the linker figure it out.  */
 755       return 0;
 756     }
 757   return fixp->fx_frag->fr_address + fixp->fx_where;
 758 }
 759
 760 int
 761 md_apply_fix3 (fixp, valuep, seg)
 762      fixS *fixp;
 763      valueT *valuep;
 764      segT seg;
 765 {
 766   valueT value;
 767   char *where;
 768
 769   fixp->fx_done = 1;
 770   return 0;
 771
 772   if (fixp->fx_addsy == (symbolS *) NULL)
 773     {
 774       value = *valuep;
 775       fixp->fx_done = 1;
 776     }
 777   else if (fixp->fx_pcrel)
 778     value = *valuep;
 779   else
 780     {
 781       value = fixp->fx_offset;
 782       if (fixp->fx_subsy != (symbolS *) NULL)
 783         {
 784           if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section)
 785             value -= S_GET_VALUE (fixp->fx_subsy);
 786           else
 787             {
 788               /* We don't actually support subtracting a symbol.  */
 789               as_bad_where (fixp->fx_file, fixp->fx_line,
 790                             "expression too complex");
 791             }
 792         }
 793     }
 794
 795   /* printf("md_apply_fix: value=0x%x  type=%d\n",  value, fixp->fx_r_type); */
 796
 797   if ((int) fixp->fx_r_type >= (int) BFD_RELOC_UNUSED)
 798     {
 799       int opindex;
 800       const struct mn10300_operand *operand;
 801       char *where;
 802       unsigned long insn, extension;
 803
 804       opindex = (int) fixp->fx_r_type - (int) BFD_RELOC_UNUSED;
 805       operand = &mn10300_operands[opindex];
 806
 807       /* Fetch the instruction, insert the fully resolved operand
 808          value, and stuff the instruction back again.
 809
 810          Note the instruction has been stored in little endian
 811          format!  */
 812       where = fixp->fx_frag->fr_literal + fixp->fx_where;
 813
 814       insn = bfd_getl32((unsigned char *) where);
 815       extension = 0;
 816       mn10300_insert_operand (&insn, &extension, operand,
 817                               (offsetT) value, fixp->fx_file,
 818                               fixp->fx_line, 0);
 819       bfd_putl32((bfd_vma) insn, (unsigned char *) where);
 820
 821       if (fixp->fx_done)
 822         {
 823           /* Nothing else to do here. */
 824           return 1;
 825         }
 826
 827       /* Determine a BFD reloc value based on the operand information.
 828          We are only prepared to turn a few of the operands into relocs. */
 829
 830         {
 831           as_bad_where(fixp->fx_file, fixp->fx_line,
 832                        "unresolved expression that must be resolved");
 833           fixp->fx_done = 1;
 834           return 1;
 835         }
 836     }
 837   else if (fixp->fx_done)
 838     {
 839       /* We still have to insert the value into memory!  */
 840       where = fixp->fx_frag->fr_literal + fixp->fx_where;
 841       if (fixp->fx_size == 1)
 842         *where = value & 0xff;
 843       if (fixp->fx_size == 2)
 844         bfd_putl16(value & 0xffff, (unsigned char *) where);
 845       if (fixp->fx_size == 4)
 846         bfd_putl32(value, (unsigned char *) where);
 847     }
 848
 849   fixp->fx_addnumber = value;
 850   return 1;
 851 }
 852
 853 /* Insert an operand value into an instruction.  */
 854
 855 static void
 856 mn10300_insert_operand (insnp, extensionp, operand, val, file, line, shift)
 857      unsigned long *insnp;
 858      unsigned long *extensionp;
 859      const struct mn10300_operand *operand;
 860      offsetT val;
 861      char *file;
 862      unsigned int line;
 863      unsigned int shift;
 864 {
 865   /* No need to check 32bit operands for a bit.  Note that
 866      MN10300_OPERAND_SPLIT is an implicit 32bit operand.  */
 867   if (operand->bits != 32
 868       && (operand->flags & MN10300_OPERAND_SPLIT) == 0)
 869     {
 870       long min, max;
 871       offsetT test;
 872
 873       if ((operand->flags & MN10300_OPERAND_SIGNED) != 0)
 874         {
 875           max = (1 << (operand->bits - 1)) - 1;
 876           min = - (1 << (operand->bits - 1));
 877         }
 878       else
 879         {
 880           max = (1 << operand->bits) - 1;
 881           min = 0;
 882         }
 883
 884       test = val;
 885
 886
 887       if (test < (offsetT) min || test > (offsetT) max)
 888         {
 889           const char *err =
 890             "operand out of range (%s not between %ld and %ld)";
 891           char buf[100];
 892
 893           sprint_value (buf, test);
 894           if (file == (char *) NULL)
 895             as_warn (err, buf, min, max);
 896           else
 897             as_warn_where (file, line, err, buf, min, max);
 898         }
 899     }
 900
 901   if ((operand->flags & MN10300_OPERAND_SPLIT) != 0)
 902     {
 903       *insnp |= (val >> 32 - operand->bits) & ((1 << operand->bits) - 1);
 904       *extensionp |= ((val & ((1 << (32 - operand->bits)) - 1))
 905                       << operand->shift);
 906     }
 907   else if ((operand->flags & MN10300_OPERAND_EXTENDED) == 0)
 908     {
 909       *insnp |= (((long) val & ((1 << operand->bits) - 1))
 910                  << (operand->shift + shift));
 911
 912       if ((operand->flags & MN10300_OPERAND_REPEATED) != 0)
 913         *insnp |= (((long) val & ((1 << operand->bits) - 1))
 914                    << (operand->shift + shift + 2));
 915     }
 916   else
 917     {
 918       *extensionp |= (((long) val & ((1 << operand->bits) - 1))
 919                       << (operand->shift + shift));
 920
 921       if ((operand->flags & MN10300_OPERAND_REPEATED) != 0)
 922         *extensionp |= (((long) val & ((1 << operand->bits) - 1))
 923                         << (operand->shift + shift + 2));
 924     }
 925 }
 926
 927 static unsigned long
 928 check_operand (insn, operand, val)
 929      unsigned long insn;
 930      const struct mn10300_operand *operand;
 931      offsetT val;
 932 {
 933   /* No need to check 32bit operands for a bit.  Note that
 934      MN10300_OPERAND_SPLIT is an implicit 32bit operand.  */
 935   if (operand->bits != 32
 936       && (operand->flags & MN10300_OPERAND_SPLIT) == 0)
 937     {
 938       long min, max;
 939       offsetT test;
 940
 941       if ((operand->flags & MN10300_OPERAND_SIGNED) != 0)
 942         {
 943           max = (1 << (operand->bits - 1)) - 1;
 944           min = - (1 << (operand->bits - 1));
 945         }
 946       else
 947         {
 948           max = (1 << operand->bits) - 1;
 949           min = 0;
 950         }
 951
 952       test = val;
 953
 954
 955       if (test < (offsetT) min || test > (offsetT) max)
 956         return 0;
 957       else
 958         return 1;
 959     }
 960   return 1;
 961 }