gas/config/tc-mn10200.c

   1 /* tc-mn10200.c -- Assembler code for the Matsushita 10200
   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/mn10200.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 mn10200_insert_operand PARAMS ((unsigned long *, unsigned long *,
  58                                             const struct mn10200_operand *,
  59                                             offsetT, char *, unsigned,
  60                                             unsigned));
  61 static unsigned long check_operand PARAMS ((unsigned long,
  62                                             const struct mn10200_operand *,
  63                                             offsetT));
  64 static int reg_name_search PARAMS ((const struct reg_name *, int, const char *));
  65 static boolean data_register_name PARAMS ((expressionS *expressionP));
  66 static boolean address_register_name PARAMS ((expressionS *expressionP));
  67 static boolean other_register_name PARAMS ((expressionS *expressionP));
  68
  69
  70 /* fixups */
  71 #define MAX_INSN_FIXUPS (5)
  72 struct mn10200_fixup
  73 {
  74   expressionS exp;
  75   int opindex;
  76   bfd_reloc_code_real_type reloc;
  77 };
  78 struct mn10200_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 *mn10200_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 };
 120 #define OTHER_REG_NAME_CNT      (sizeof(other_registers) / sizeof(struct reg_name))
 121
 122 /* reg_name_search does a binary search of the given register table
 123    to see if "name" is a valid regiter name.  Returns the register
 124    number from the array on success, or -1 on failure. */
 125
 126 static int
 127 reg_name_search (regs, regcount, name)
 128      const struct reg_name *regs;
 129      int regcount;
 130      const char *name;
 131 {
 132   int middle, low, high;
 133   int cmp;
 134
 135   low = 0;
 136   high = regcount - 1;
 137
 138   do
 139     {
 140       middle = (low + high) / 2;
 141       cmp = strcasecmp (name, regs[middle].name);
 142       if (cmp < 0)
 143         high = middle - 1;
 144       else if (cmp > 0)
 145         low = middle + 1;
 146       else
 147           return regs[middle].value;
 148     }
 149   while (low <= high);
 150   return -1;
 151 }
 152
 153
 154 /* Summary of register_name().
 155  *
 156  * in: Input_line_pointer points to 1st char of operand.
 157  *
 158  * out: A expressionS.
 159  *      The operand may have been a register: in this case, X_op == O_register,
 160  *      X_add_number is set to the register number, and truth is returned.
 161  *      Input_line_pointer->(next non-blank) char after operand, or is in
 162  *      its original state.
 163  */
 164 static boolean
 165 data_register_name (expressionP)
 166      expressionS *expressionP;
 167 {
 168   int reg_number;
 169   char *name;
 170   char *start;
 171   char c;
 172
 173   /* Find the spelling of the operand */
 174   start = name = input_line_pointer;
 175
 176   c = get_symbol_end ();
 177   reg_number = reg_name_search (data_registers, DATA_REG_NAME_CNT, name);
 178
 179   /* look to see if it's in the register table */
 180   if (reg_number >= 0)
 181     {
 182       expressionP->X_op = O_register;
 183       expressionP->X_add_number = reg_number;
 184
 185       /* make the rest nice */
 186       expressionP->X_add_symbol = NULL;
 187       expressionP->X_op_symbol = NULL;
 188       *input_line_pointer = c;  /* put back the delimiting char */
 189       return true;
 190     }
 191   else
 192     {
 193       /* reset the line as if we had not done anything */
 194       *input_line_pointer = c;   /* put back the delimiting char */
 195       input_line_pointer = start; /* reset input_line pointer */
 196       return false;
 197     }
 198 }
 199
 200 /* Summary of register_name().
 201  *
 202  * in: Input_line_pointer points to 1st char of operand.
 203  *
 204  * out: A expressionS.
 205  *      The operand may have been a register: in this case, X_op == O_register,
 206  *      X_add_number is set to the register number, and truth is returned.
 207  *      Input_line_pointer->(next non-blank) char after operand, or is in
 208  *      its original state.
 209  */
 210 static boolean
 211 address_register_name (expressionP)
 212      expressionS *expressionP;
 213 {
 214   int reg_number;
 215   char *name;
 216   char *start;
 217   char c;
 218
 219   /* Find the spelling of the operand */
 220   start = name = input_line_pointer;
 221
 222   c = get_symbol_end ();
 223   reg_number = reg_name_search (address_registers, ADDRESS_REG_NAME_CNT, name);
 224
 225   /* look to see if it's in the register table */
 226   if (reg_number >= 0)
 227     {
 228       expressionP->X_op = O_register;
 229       expressionP->X_add_number = reg_number;
 230
 231       /* make the rest nice */
 232       expressionP->X_add_symbol = NULL;
 233       expressionP->X_op_symbol = NULL;
 234       *input_line_pointer = c;  /* put back the delimiting char */
 235       return true;
 236     }
 237   else
 238     {
 239       /* reset the line as if we had not done anything */
 240       *input_line_pointer = c;   /* put back the delimiting char */
 241       input_line_pointer = start; /* reset input_line pointer */
 242       return false;
 243     }
 244 }
 245
 246 /* Summary of register_name().
 247  *
 248  * in: Input_line_pointer points to 1st char of operand.
 249  *
 250  * out: A expressionS.
 251  *      The operand may have been a register: in this case, X_op == O_register,
 252  *      X_add_number is set to the register number, and truth is returned.
 253  *      Input_line_pointer->(next non-blank) char after operand, or is in
 254  *      its original state.
 255  */
 256 static boolean
 257 other_register_name (expressionP)
 258      expressionS *expressionP;
 259 {
 260   int reg_number;
 261   char *name;
 262   char *start;
 263   char c;
 264
 265   /* Find the spelling of the operand */
 266   start = name = input_line_pointer;
 267
 268   c = get_symbol_end ();
 269   reg_number = reg_name_search (other_registers, OTHER_REG_NAME_CNT, name);
 270
 271   /* look to see if it's in the register table */
 272   if (reg_number >= 0)
 273     {
 274       expressionP->X_op = O_register;
 275       expressionP->X_add_number = reg_number;
 276
 277       /* make the rest nice */
 278       expressionP->X_add_symbol = NULL;
 279       expressionP->X_op_symbol = NULL;
 280       *input_line_pointer = c;  /* put back the delimiting char */
 281       return true;
 282     }
 283   else
 284     {
 285       /* reset the line as if we had not done anything */
 286       *input_line_pointer = c;   /* put back the delimiting char */
 287       input_line_pointer = start; /* reset input_line pointer */
 288       return false;
 289     }
 290 }
 291
 292 void
 293 md_show_usage (stream)
 294   FILE *stream;
 295 {
 296   fprintf(stream, "MN10200 options:\n\
 297 none yet\n");
 298 }
 299
 300 int
 301 md_parse_option (c, arg)
 302      int c;
 303      char *arg;
 304 {
 305   return 0;
 306 }
 307
 308 symbolS *
 309 md_undefined_symbol (name)
 310   char *name;
 311 {
 312   return 0;
 313 }
 314
 315 char *
 316 md_atof (type, litp, sizep)
 317   int type;
 318   char *litp;
 319   int *sizep;
 320 {
 321   int prec;
 322   LITTLENUM_TYPE words[4];
 323   char *t;
 324   int i;
 325
 326   switch (type)
 327     {
 328     case 'f':
 329       prec = 2;
 330       break;
 331
 332     case 'd':
 333       prec = 4;
 334       break;
 335
 336     default:
 337       *sizep = 0;
 338       return "bad call to md_atof";
 339     }
 340
 341   t = atof_ieee (input_line_pointer, type, words);
 342   if (t)
 343     input_line_pointer = t;
 344
 345   *sizep = prec * 2;
 346
 347   for (i = prec - 1; i >= 0; i--)
 348     {
 349       md_number_to_chars (litp, (valueT) words[i], 2);
 350       litp += 2;
 351     }
 352
 353   return NULL;
 354 }
 355
 356
 357 void
 358 md_convert_frag (abfd, sec, fragP)
 359   bfd *abfd;
 360   asection *sec;
 361   fragS *fragP;
 362 {
 363   /* printf ("call to md_convert_frag \n"); */
 364   abort ();
 365 }
 366
 367 valueT
 368 md_section_align (seg, addr)
 369      asection *seg;
 370      valueT addr;
 371 {
 372   int align = bfd_get_section_alignment (stdoutput, seg);
 373   return ((addr + (1 << align) - 1) & (-1 << align));
 374 }
 375
 376 void
 377 md_begin ()
 378 {
 379   char *prev_name = "";
 380   register const struct mn10200_opcode *op;
 381
 382   mn10200_hash = hash_new();
 383
 384   /* Insert unique names into hash table.  The MN10200 instruction set
 385      has many identical opcode names that have different opcodes based
 386      on the operands.  This hash table then provides a quick index to
 387      the first opcode with a particular name in the opcode table.  */
 388
 389   op = mn10200_opcodes;
 390   while (op->name)
 391     {
 392       if (strcmp (prev_name, op->name))
 393         {
 394           prev_name = (char *) op->name;
 395           hash_insert (mn10200_hash, op->name, (char *) op);
 396         }
 397       op++;
 398     }
 399
 400   /* This is both a simplification (we don't have to write md_apply_fix)
 401      and support for future optimizations (branch shortening and similar
 402      stuff in the linker.  */
 403   linkrelax = 1;
 404 }
 405
 406 void
 407 md_assemble (str)
 408      char *str;
 409 {
 410   char *s;
 411   struct mn10200_opcode *opcode;
 412   struct mn10200_opcode *next_opcode;
 413   const unsigned char *opindex_ptr;
 414   int next_opindex;
 415   unsigned long insn, extension, size = 0;
 416   char *f;
 417   int i;
 418   int match;
 419
 420   /* Get the opcode.  */
 421   for (s = str; *s != '\0' && ! isspace (*s); s++)
 422     ;
 423   if (*s != '\0')
 424     *s++ = '\0';
 425
 426   /* find the first opcode with the proper name */
 427   opcode = (struct mn10200_opcode *)hash_find (mn10200_hash, str);
 428   if (opcode == NULL)
 429     {
 430       as_bad ("Unrecognized opcode: `%s'", str);
 431       return;
 432     }
 433
 434   str = s;
 435   while (isspace (*str))
 436     ++str;
 437
 438   input_line_pointer = str;
 439
 440   for(;;)
 441     {
 442       const char *errmsg = NULL;
 443       int op_idx;
 444       char *hold;
 445       int extra_shift = 0;
 446
 447       fc = 0;
 448       match = 0;
 449       next_opindex = 0;
 450       insn = opcode->opcode;
 451       extension = 0;
 452       for (op_idx = 1, opindex_ptr = opcode->operands;
 453            *opindex_ptr != 0;
 454            opindex_ptr++, op_idx++)
 455         {
 456           const struct mn10200_operand *operand;
 457           expressionS ex;
 458
 459           if (next_opindex == 0)
 460             {
 461               operand = &mn10200_operands[*opindex_ptr];
 462             }
 463           else
 464             {
 465               operand = &mn10200_operands[next_opindex];
 466               next_opindex = 0;
 467             }
 468
 469           errmsg = NULL;
 470
 471           while (*str == ' ' || *str == ',')
 472             ++str;
 473
 474           /* Gather the operand. */
 475           hold = input_line_pointer;
 476           input_line_pointer = str;
 477
 478           if (operand->flags & MN10200_OPERAND_PAREN)
 479             {
 480               if (*input_line_pointer != ')' && *input_line_pointer != '(')
 481                 {
 482                   input_line_pointer = hold;
 483                   str = hold;
 484                   goto error;
 485                 }
 486               input_line_pointer++;
 487               goto keep_going;
 488             }
 489           /* See if we can match the operands.  */
 490           else if (operand->flags & MN10200_OPERAND_DREG)
 491             {
 492               if (!data_register_name (&ex))
 493                 {
 494                   input_line_pointer = hold;
 495                   str = hold;
 496                   goto error;
 497                 }
 498             }
 499           else if (operand->flags & MN10200_OPERAND_AREG)
 500             {
 501               if (!address_register_name (&ex))
 502                 {
 503                   input_line_pointer = hold;
 504                   str = hold;
 505                   goto error;
 506                 }
 507             }
 508           else if (operand->flags & MN10200_OPERAND_PSW)
 509             {
 510               char *start = input_line_pointer;
 511               char c = get_symbol_end ();
 512
 513               if (strcmp (start, "psw") != 0)
 514                 {
 515                   *input_line_pointer = c;
 516                   input_line_pointer = hold;
 517                   str = hold;
 518                   goto error;
 519                 }
 520               *input_line_pointer = c;
 521               goto keep_going;
 522             }
 523           else if (operand->flags & MN10200_OPERAND_MDR)
 524             {
 525               char *start = input_line_pointer;
 526               char c = get_symbol_end ();
 527
 528               if (strcmp (start, "mdr") != 0)
 529                 {
 530                   *input_line_pointer = c;
 531                   input_line_pointer = hold;
 532                   str = hold;
 533                   goto error;
 534                 }
 535               *input_line_pointer = c;
 536               goto keep_going;
 537             }
 538           else if (data_register_name (&ex))
 539             {
 540               input_line_pointer = hold;
 541               str = hold;
 542               goto error;
 543             }
 544           else if (address_register_name (&ex))
 545             {
 546               input_line_pointer = hold;
 547               str = hold;
 548               goto error;
 549             }
 550           else if (other_register_name (&ex))
 551             {
 552               input_line_pointer = hold;
 553               str = hold;
 554               goto error;
 555             }
 556           else if (*str == ')' || *str == '(')
 557             {
 558               input_line_pointer = hold;
 559               str = hold;
 560               goto error;
 561             }
 562           else
 563             {
 564               expression (&ex);
 565             }
 566
 567           switch (ex.X_op)
 568             {
 569             case O_illegal:
 570               errmsg = "illegal operand";
 571               goto error;
 572             case O_absent:
 573               errmsg = "missing operand";
 574               goto error;
 575             case O_register:
 576               if ((operand->flags
 577                    & (MN10200_OPERAND_DREG | MN10200_OPERAND_AREG)) == 0)
 578                 {
 579                   input_line_pointer = hold;
 580                   str = hold;
 581                   goto error;
 582                 }
 583
 584               if (opcode->format == FMT_2 || opcode->format == FMT_5)
 585                 extra_shift = 8;
 586               else if (opcode->format == FMT_3 || opcode->format == FMT_6
 587                        || opcode->format == FMT_7)
 588                 extra_shift = 16;
 589               else
 590                 extra_shift = 0;
 591
 592               mn10200_insert_operand (&insn, &extension, operand,
 593                                       ex.X_add_number, (char *) NULL,
 594                                       0, extra_shift);
 595
 596               break;
 597
 598             case O_constant:
 599               /* If this operand can be promoted, and it doesn't
 600                  fit into the allocated bitfield for this insn,
 601                  then promote it (ie this opcode does not match).  */
 602               if (operand->flags & MN10200_OPERAND_PROMOTE
 603                   && ! check_operand (insn, operand, ex.X_add_number))
 604                 {
 605                   input_line_pointer = hold;
 606                   str = hold;
 607                   goto error;
 608                 }
 609
 610               mn10200_insert_operand (&insn, &extension, operand,
 611                                       ex.X_add_number, (char *) NULL,
 612                                       0, 0);
 613               break;
 614
 615             default:
 616               /* If this operand can be promoted, then this opcode didn't
 617                  match since we can't know if it needed promotion!  */
 618               if (operand->flags & MN10200_OPERAND_PROMOTE)
 619                 {
 620                   input_line_pointer = hold;
 621                   str = hold;
 622                   goto error;
 623                 }
 624
 625               /* We need to generate a fixup for this expression.  */
 626               if (fc >= MAX_INSN_FIXUPS)
 627                 as_fatal ("too many fixups");
 628               fixups[fc].exp = ex;
 629               fixups[fc].opindex = *opindex_ptr;
 630               fixups[fc].reloc = BFD_RELOC_UNUSED;
 631               ++fc;
 632               break;
 633             }
 634
 635 keep_going:
 636           str = input_line_pointer;
 637           input_line_pointer = hold;
 638
 639           while (*str == ' ' || *str == ',')
 640             ++str;
 641
 642         }
 643
 644       /* Make sure we used all the operands!  */
 645       if (*str != ',')
 646         match = 1;
 647
 648     error:
 649       if (match == 0)
 650         {
 651           next_opcode = opcode + 1;
 652           if (!strcmp(next_opcode->name, opcode->name))
 653             {
 654               opcode = next_opcode;
 655               continue;
 656             }
 657
 658           as_bad ("%s", errmsg);
 659           return;
 660         }
 661       break;
 662     }
 663
 664   while (isspace (*str))
 665     ++str;
 666
 667   if (*str != '\0')
 668     as_bad ("junk at end of line: `%s'", str);
 669
 670   input_line_pointer = str;
 671
 672   if (opcode->format == FMT_1)
 673     size = 1;
 674   else if (opcode->format == FMT_2 || opcode->format == FMT_4)
 675     size = 2;
 676   else if (opcode->format == FMT_3 || opcode->format == FMT_5)
 677     size = 3;
 678   else if (opcode->format == FMT_6)
 679     size = 4;
 680   else if (opcode->format == FMT_7)
 681     size = 5;
 682   else
 683     abort ();
 684
 685   /* Write out the instruction.  */
 686
 687   f = frag_more (size);
 688
 689   /* Oh, what a mess.  The instruction is in big endian format, but
 690      16 and 24bit immediates are little endian!  */
 691   if (opcode->format == FMT_3)
 692     {
 693       number_to_chars_bigendian (f, (insn >> 16) & 0xff, 1);
 694       number_to_chars_littleendian (f + 1, insn & 0xffff, 2);
 695     }
 696   else if (opcode->format == FMT_6)
 697     {
 698       number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2);
 699       number_to_chars_littleendian (f + 2, insn & 0xffff, 2);
 700     }
 701   else if (opcode->format == FMT_7)
 702     {
 703       number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2);
 704       number_to_chars_littleendian (f + 2, insn & 0xffff, 2);
 705       number_to_chars_littleendian (f + 4, extension & 0xff, 1);
 706     }
 707   else
 708     {
 709       number_to_chars_bigendian (f, insn, size > 4 ? 4 : size);
 710     }
 711
 712   /* Create any fixups.  */
 713   for (i = 0; i < fc; i++)
 714     {
 715       const struct mn10200_operand *operand;
 716
 717       operand = &mn10200_operands[fixups[i].opindex];
 718       if (fixups[i].reloc != BFD_RELOC_UNUSED)
 719         {
 720           reloc_howto_type *reloc_howto;
 721           int size;
 722           int offset;
 723           fixS *fixP;
 724
 725           reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc);
 726
 727           if (!reloc_howto)
 728             abort();
 729
 730           size = bfd_get_reloc_size (reloc_howto);
 731
 732           if (size < 1 || size > 4)
 733             abort();
 734
 735           offset = 4 - size;
 736           fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset, size,
 737                               &fixups[i].exp,
 738                               reloc_howto->pc_relative,
 739                               fixups[i].reloc);
 740         }
 741       else
 742         {
 743           int reloc, pcrel, reloc_size, offset;
 744
 745           reloc = BFD_RELOC_NONE;
 746           /* How big is the reloc?  Remember SPLIT relocs are
 747              implicitly 32bits.  */
 748           reloc_size = operand->bits;
 749
 750           offset = size - reloc_size / 8;
 751
 752           /* Is the reloc pc-relative?  */
 753           pcrel = (operand->flags & MN10200_OPERAND_PCREL) != 0;
 754
 755
 756           /* Choose a proper BFD relocation type.  */
 757           if (pcrel)
 758             {
 759               if (reloc_size == 8)
 760                 reloc = BFD_RELOC_8_PCREL;
 761               else if (reloc_size == 24)
 762                 reloc = BFD_RELOC_24_PCREL;
 763               else
 764                 abort ();
 765             }
 766           else
 767             {
 768               if (reloc_size == 32)
 769                 reloc = BFD_RELOC_32;
 770               else if (reloc_size == 16)
 771                 reloc = BFD_RELOC_16;
 772               else if (reloc_size == 8)
 773                 reloc = BFD_RELOC_8;
 774               else if (reloc_size == 24)
 775                 reloc = BFD_RELOC_24;
 776               else
 777                 abort ();
 778             }
 779
 780           /* Convert the size of the reloc into what fix_new_exp wants.  */
 781           reloc_size = reloc_size / 8;
 782           if (reloc_size == 8)
 783             reloc_size = 0;
 784           else if (reloc_size == 16)
 785             reloc_size = 1;
 786           else if (reloc_size == 32 || reloc_size == 24)
 787             reloc_size = 2;
 788
 789           fix_new_exp (frag_now, f - frag_now->fr_literal + offset, reloc_size,
 790                        &fixups[i].exp, pcrel,
 791                        ((bfd_reloc_code_real_type) reloc));
 792         }
 793     }
 794 }
 795
 796
 797 /* if while processing a fixup, a reloc really needs to be created */
 798 /* then it is done here */
 799
 800 arelent *
 801 tc_gen_reloc (seg, fixp)
 802      asection *seg;
 803      fixS *fixp;
 804 {
 805   arelent *reloc;
 806   reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent));
 807   reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym;
 808   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
 809   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
 810   if (reloc->howto == (reloc_howto_type *) NULL)
 811     {
 812       as_bad_where (fixp->fx_file, fixp->fx_line,
 813                     "reloc %d not supported by object file format", (int)fixp->fx_r_type);
 814       return NULL;
 815     }
 816   reloc->addend = fixp->fx_offset;
 817   /*  printf("tc_gen_reloc: addr=%x  addend=%x\n", reloc->address, reloc->addend); */
 818   return reloc;
 819 }
 820
 821 int
 822 md_estimate_size_before_relax (fragp, seg)
 823      fragS *fragp;
 824      asection *seg;
 825 {
 826   return 0;
 827 }
 828
 829 long
 830 md_pcrel_from (fixp)
 831      fixS *fixp;
 832 {
 833   return fixp->fx_frag->fr_address;
 834 #if 0
 835   if (fixp->fx_addsy != (symbolS *) NULL && ! S_IS_DEFINED (fixp->fx_addsy))
 836     {
 837       /* The symbol is undefined.  Let the linker figure it out.  */
 838       return 0;
 839     }
 840   return fixp->fx_frag->fr_address + fixp->fx_where;
 841 #endif
 842 }
 843
 844 int
 845 md_apply_fix3 (fixp, valuep, seg)
 846      fixS *fixp;
 847      valueT *valuep;
 848      segT seg;
 849 {
 850   /* We shouldn't ever get here because linkrelax is nonzero.  */
 851   abort ();
 852   fixp->fx_done = 1;
 853   return 0;
 854 }
 855
 856 /* Insert an operand value into an instruction.  */
 857
 858 static void
 859 mn10200_insert_operand (insnp, extensionp, operand, val, file, line, shift)
 860      unsigned long *insnp;
 861      unsigned long *extensionp;
 862      const struct mn10200_operand *operand;
 863      offsetT val;
 864      char *file;
 865      unsigned int line;
 866      unsigned int shift;
 867 {
 868   /* No need to check 24 or 32bit operands for a bit.  */
 869   if (operand->bits < 24
 870       && (operand->flags & MN10200_OPERAND_NOCHECK) == 0)
 871     {
 872       long min, max;
 873       offsetT test;
 874
 875       if ((operand->flags & MN10200_OPERAND_SIGNED) != 0)
 876         {
 877           max = (1 << (operand->bits - 1)) - 1;
 878           min = - (1 << (operand->bits - 1));
 879         }
 880       else
 881         {
 882           max = (1 << operand->bits) - 1;
 883           min = 0;
 884         }
 885
 886       test = val;
 887
 888
 889       if (test < (offsetT) min || test > (offsetT) max)
 890         {
 891           const char *err =
 892             "operand out of range (%s not between %ld and %ld)";
 893           char buf[100];
 894
 895           sprint_value (buf, test);
 896           if (file == (char *) NULL)
 897             as_warn (err, buf, min, max);
 898           else
 899             as_warn_where (file, line, err, buf, min, max);
 900         }
 901     }
 902
 903   if ((operand->flags & MN10200_OPERAND_EXTENDED) == 0)
 904     {
 905       *insnp |= (((long) val & ((1 << operand->bits) - 1))
 906                  << (operand->shift + shift));
 907
 908       if ((operand->flags & MN10200_OPERAND_REPEATED) != 0)
 909         *insnp |= (((long) val & ((1 << operand->bits) - 1))
 910                    << (operand->shift + shift + 2));
 911     }
 912   else
 913     {
 914       *extensionp |= (val >> 16) & 0xff;
 915       *insnp |= val & 0xffff;
 916     }
 917 }
 918
 919 static unsigned long
 920 check_operand (insn, operand, val)
 921      unsigned long insn;
 922      const struct mn10200_operand *operand;
 923      offsetT val;
 924 {
 925   /* No need to check 24bit or 32bit operands for a bit.  */
 926   if (operand->bits < 24
 927       && (operand->flags & MN10200_OPERAND_NOCHECK) == 0)
 928     {
 929       long min, max;
 930       offsetT test;
 931
 932       if ((operand->flags & MN10200_OPERAND_SIGNED) != 0)
 933         {
 934           max = (1 << (operand->bits - 1)) - 1;
 935           min = - (1 << (operand->bits - 1));
 936         }
 937       else
 938         {
 939           max = (1 << operand->bits) - 1;
 940           min = 0;
 941         }
 942
 943       test = val;
 944
 945
 946       if (test < (offsetT) min || test > (offsetT) max)
 947         return 0;
 948       else
 949         return 1;
 950     }
 951   return 1;
 952 }