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   /* This is both a simplification (we don't have to write md_apply_fix)
 402      and support for future optimizations (branch shortening and similar
 403      stuff in the linker.  */
 404   linkrelax = 1;
 405 }
 406
 407 void
 408 md_assemble (str)
 409      char *str;
 410 {
 411   char *s;
 412   struct mn10300_opcode *opcode;
 413   struct mn10300_opcode *next_opcode;
 414   const unsigned char *opindex_ptr;
 415   int next_opindex;
 416   unsigned long insn, extension, size;
 417   char *f;
 418   int i;
 419   int match;
 420   bfd_reloc_code_real_type reloc;
 421
 422   /* Get the opcode.  */
 423   for (s = str; *s != '\0' && ! isspace (*s); s++)
 424     ;
 425   if (*s != '\0')
 426     *s++ = '\0';
 427
 428   /* find the first opcode with the proper name */
 429   opcode = (struct mn10300_opcode *)hash_find (mn10300_hash, str);
 430   if (opcode == NULL)
 431     {
 432       as_bad ("Unrecognized opcode: `%s'", str);
 433       return;
 434     }
 435
 436   str = s;
 437   while (isspace (*str))
 438     ++str;
 439
 440   input_line_pointer = str;
 441
 442   for(;;)
 443     {
 444       const char *errmsg = NULL;
 445       int op_idx;
 446       char *hold;
 447       int extra_shift = 0;
 448
 449       fc = 0;
 450       match = 0;
 451       next_opindex = 0;
 452       insn = opcode->opcode;
 453       extension = 0;
 454       for (op_idx = 1, opindex_ptr = opcode->operands;
 455            *opindex_ptr != 0;
 456            opindex_ptr++, op_idx++)
 457         {
 458           const struct mn10300_operand *operand;
 459           expressionS ex;
 460
 461           if (next_opindex == 0)
 462             {
 463               operand = &mn10300_operands[*opindex_ptr];
 464             }
 465           else
 466             {
 467               operand = &mn10300_operands[next_opindex];
 468               next_opindex = 0;
 469             }
 470
 471           errmsg = NULL;
 472
 473           while (*str == ' ' || *str == ',')
 474             ++str;
 475
 476           /* Gather the operand. */
 477           hold = input_line_pointer;
 478           input_line_pointer = str;
 479
 480           if (operand->flags & MN10300_OPERAND_PAREN)
 481             {
 482               if (*input_line_pointer != ')' && *input_line_pointer != '(')
 483                 {
 484                   input_line_pointer = hold;
 485                   str = hold;
 486                   goto error;
 487                 }
 488               input_line_pointer++;
 489               goto keep_going;
 490             }
 491           /* See if we can match the operands.  */
 492           else if (operand->flags & MN10300_OPERAND_DREG)
 493             {
 494               if (!data_register_name (&ex))
 495                 {
 496                   input_line_pointer = hold;
 497                   str = hold;
 498                   goto error;
 499                 }
 500             }
 501           else if (operand->flags & MN10300_OPERAND_AREG)
 502             {
 503               if (!address_register_name (&ex))
 504                 {
 505                   input_line_pointer = hold;
 506                   str = hold;
 507                   goto error;
 508                 }
 509             }
 510           else if (operand->flags & MN10300_OPERAND_SP)
 511             {
 512               char *start = input_line_pointer;
 513               char c = get_symbol_end ();
 514
 515               if (strcmp (start, "sp") != 0)
 516                 {
 517                   *input_line_pointer = c;
 518                   input_line_pointer = hold;
 519                   str = hold;
 520                   goto error;
 521                 }
 522               *input_line_pointer = c;
 523               goto keep_going;
 524             }
 525           else if (operand->flags & MN10300_OPERAND_PSW)
 526             {
 527               char *start = input_line_pointer;
 528               char c = get_symbol_end ();
 529
 530               if (strcmp (start, "psw") != 0)
 531                 {
 532                   *input_line_pointer = c;
 533                   input_line_pointer = hold;
 534                   str = hold;
 535                   goto error;
 536                 }
 537               *input_line_pointer = c;
 538               goto keep_going;
 539             }
 540           else if (operand->flags & MN10300_OPERAND_MDR)
 541             {
 542               char *start = input_line_pointer;
 543               char c = get_symbol_end ();
 544
 545               if (strcmp (start, "mdr") != 0)
 546                 {
 547                   *input_line_pointer = c;
 548                   input_line_pointer = hold;
 549                   str = hold;
 550                   goto error;
 551                 }
 552               *input_line_pointer = c;
 553               goto keep_going;
 554             }
 555           else if (operand->flags & MN10300_OPERAND_REG_LIST)
 556             {
 557               unsigned int value = 0;
 558               if (*input_line_pointer != '[')
 559                 {
 560                   input_line_pointer = hold;
 561                   str = hold;
 562                   goto error;
 563                 }
 564
 565               /* Eat the '['.  */
 566               input_line_pointer++;
 567
 568               /* A null register list can not be specified.  */
 569               if (*input_line_pointer == ']')
 570                 {
 571                   input_line_pointer = hold;
 572                   str = hold;
 573                   goto error;
 574                 }
 575
 576               while (*input_line_pointer != ']')
 577                 {
 578                   char *start;
 579                   char c;
 580
 581                   if (*input_line_pointer == ',')
 582                     input_line_pointer++;
 583
 584                   start = input_line_pointer;
 585                   c = get_symbol_end ();
 586
 587                   if (strcmp (start, "d2") == 0)
 588                     {
 589                       value |= 0x80;
 590                       *input_line_pointer = c;
 591                     }
 592                   else if (strcmp (start, "d3") == 0)
 593                     {
 594                       value |= 0x40;
 595                       *input_line_pointer = c;
 596                     }
 597                   else if (strcmp (start, "a2") == 0)
 598                     {
 599                       value |= 0x20;
 600                       *input_line_pointer = c;
 601                     }
 602                   else if (strcmp (start, "a3") == 0)
 603                     {
 604                       value |= 0x10;
 605                       *input_line_pointer = c;
 606                     }
 607                   else if (strcmp (start, "other") == 0)
 608                     {
 609                       value |= 0x08;
 610                       *input_line_pointer = c;
 611                     }
 612                   else
 613                     {
 614                       input_line_pointer = hold;
 615                       str = hold;
 616                       goto error;
 617                     }
 618                 }
 619               input_line_pointer++;
 620               mn10300_insert_operand (&insn, &extension, operand,
 621                                       value, (char *) NULL, 0, 0);
 622               goto keep_going;
 623
 624             }
 625           else if (data_register_name (&ex))
 626             {
 627               input_line_pointer = hold;
 628               str = hold;
 629               goto error;
 630             }
 631           else if (address_register_name (&ex))
 632             {
 633               input_line_pointer = hold;
 634               str = hold;
 635               goto error;
 636             }
 637           else if (other_register_name (&ex))
 638             {
 639               input_line_pointer = hold;
 640               str = hold;
 641               goto error;
 642             }
 643           else if (*str == ')' || *str == '(')
 644             {
 645               input_line_pointer = hold;
 646               str = hold;
 647               goto error;
 648             }
 649           else
 650             {
 651               expression (&ex);
 652             }
 653
 654           switch (ex.X_op)
 655             {
 656             case O_illegal:
 657               errmsg = "illegal operand";
 658               goto error;
 659             case O_absent:
 660               errmsg = "missing operand";
 661               goto error;
 662             case O_register:
 663               if (operand->flags & (MN10300_OPERAND_DREG
 664                                     | MN10300_OPERAND_AREG) == 0)
 665                 {
 666                   input_line_pointer = hold;
 667                   str = hold;
 668                   goto error;
 669                 }
 670
 671               if (opcode->format == FMT_D1 || opcode->format == FMT_S1)
 672                 extra_shift = 8;
 673               else if (opcode->format == FMT_D2 || opcode->format == FMT_D4
 674                        || opcode->format == FMT_S2 || opcode->format == FMT_S4
 675                        || opcode->format == FMT_S6 || opcode->format == FMT_D5)
 676                 extra_shift = 16;
 677               else
 678                 extra_shift = 0;
 679
 680               mn10300_insert_operand (&insn, &extension, operand,
 681                                       ex.X_add_number, (char *) NULL,
 682                                       0, extra_shift);
 683
 684               break;
 685
 686             case O_constant:
 687               /* If this operand can be promoted, and it doesn't
 688                  fit into the allocated bitfield for this insn,
 689                  then promote it (ie this opcode does not match).  */
 690               if (operand->flags & MN10300_OPERAND_PROMOTE
 691                   && ! check_operand (insn, operand, ex.X_add_number))
 692                 {
 693                   input_line_pointer = hold;
 694                   str = hold;
 695                   goto error;
 696                 }
 697
 698               mn10300_insert_operand (&insn, &extension, operand,
 699                                       ex.X_add_number, (char *) NULL,
 700                                       0, 0);
 701               break;
 702
 703             default:
 704               /* If this operand can be promoted, then this opcode didn't
 705                  match since we can't know if it needed promotion!  */
 706               if (operand->flags & MN10300_OPERAND_PROMOTE)
 707                 {
 708                   input_line_pointer = hold;
 709                   str = hold;
 710                   goto error;
 711                 }
 712
 713               /* We need to generate a fixup for this expression.  */
 714               if (fc >= MAX_INSN_FIXUPS)
 715                 as_fatal ("too many fixups");
 716               fixups[fc].exp = ex;
 717               fixups[fc].opindex = *opindex_ptr;
 718               fixups[fc].reloc = BFD_RELOC_UNUSED;
 719               ++fc;
 720               break;
 721             }
 722
 723 keep_going:
 724           str = input_line_pointer;
 725           input_line_pointer = hold;
 726
 727           while (*str == ' ' || *str == ',')
 728             ++str;
 729
 730         }
 731
 732       /* Make sure we used all the operands!  */
 733       if (*str != ',')
 734         match = 1;
 735
 736     error:
 737       if (match == 0)
 738         {
 739           next_opcode = opcode + 1;
 740           if (next_opcode->opcode != 0 && !strcmp(next_opcode->name, opcode->name))
 741             {
 742               opcode = next_opcode;
 743               continue;
 744             }
 745
 746           as_bad ("%s", errmsg);
 747           return;
 748         }
 749       break;
 750     }
 751
 752   while (isspace (*str))
 753     ++str;
 754
 755   if (*str != '\0')
 756     as_bad ("junk at end of line: `%s'", str);
 757
 758   input_line_pointer = str;
 759
 760   /* Determine the size of the instruction.  */
 761   if (opcode->format == FMT_S0)
 762     size = 1;
 763
 764   if (opcode->format == FMT_S1 || opcode->format == FMT_D0)
 765     size = 2;
 766
 767   if (opcode->format == FMT_S2 || opcode->format == FMT_D1)
 768     size = 3;
 769
 770   if (opcode->format == FMT_S4)
 771     size = 5;
 772
 773   if (opcode->format == FMT_S6 || opcode->format == FMT_D5)
 774     size = 7;
 775
 776   if (opcode->format == FMT_D2)
 777     size = 4;
 778
 779   if (opcode->format == FMT_D4)
 780     size = 6;
 781
 782   /* Write out the instruction.  */
 783
 784   f = frag_more (size);
 785   number_to_chars_bigendian (f, insn, size > 4 ? 4 : size);
 786   if (size > 4)
 787     number_to_chars_bigendian (f + 4, extension, size - 4);
 788
 789   /* Create any fixups.  */
 790   for (i = 0; i < fc; i++)
 791     {
 792       const struct mn10300_operand *operand;
 793
 794       operand = &mn10300_operands[fixups[i].opindex];
 795       if (fixups[i].reloc != BFD_RELOC_UNUSED)
 796         {
 797           reloc_howto_type *reloc_howto;
 798           int size;
 799           int offset;
 800           fixS *fixP;
 801
 802           reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc);
 803
 804           if (!reloc_howto)
 805             abort();
 806
 807           size = bfd_get_reloc_size (reloc_howto);
 808
 809           if (size < 1 || size > 4)
 810             abort();
 811
 812           offset = 4 - size;
 813           fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset, size,
 814                               &fixups[i].exp,
 815                               reloc_howto->pc_relative,
 816                               fixups[i].reloc);
 817         }
 818       else
 819         {
 820           int reloc, pcrel, reloc_size, offset;
 821
 822           /* How big is the reloc?  Remember SPLIT relocs are
 823              implicitly 32bits.  */
 824           if ((operand->flags & MN10300_OPERAND_SPLIT) != 0)
 825             reloc_size = 32;
 826           else
 827             reloc_size = operand->bits;
 828
 829           /* Is the reloc pc-relative?  */
 830           pcrel = (operand->flags & MN10300_OPERAND_PCREL) != 0;
 831
 832           /* Gross.  This disgusting hack is to make sure we
 833              get the right offset for the 16/32 bit reloc in
 834              "call" instructions.  Basically they're a pain
 835              because the reloc isn't at the end of the instruction.  */
 836           if ((size == 5 || size == 7)
 837               && (((insn >> 24) & 0xff) == 0xcd
 838                   || ((insn >> 24) & 0xff) == 0xdd))
 839             size -= 2;
 840
 841           /* Similarly for certain bit instructions which don't
 842              hav their 32bit reloc at the tail of the instruction.  */
 843           if (size == 7
 844               && (((insn >> 16) & 0xffff) == 0xfe00
 845                   || ((insn >> 16) & 0xffff) == 0xfe01
 846                   || ((insn >> 16) & 0xffff) == 0xfe02))
 847             size -= 1;
 848
 849           /* Determine offset from start of this insn to insert the
 850              reloc.  Except for a few exceptions we insert the reloc
 851              at the tail of the instruction.  */
 852           offset = size - reloc_size / 8;
 853
 854           /* Choose a proper BFD relocation type.  */
 855           if (pcrel)
 856             {
 857               if (reloc_size == 32)
 858                 reloc = BFD_RELOC_32_PCREL;
 859               else if (reloc_size == 16)
 860                 reloc = BFD_RELOC_16_PCREL;
 861               else if (reloc_size == 8)
 862                 reloc = BFD_RELOC_8_PCREL;
 863               else
 864                 abort ();
 865             }
 866           else
 867             {
 868               if (reloc_size == 32)
 869                 reloc = BFD_RELOC_32;
 870               else if (reloc_size == 16)
 871                 reloc = BFD_RELOC_16;
 872               else if (reloc_size == 8)
 873                 reloc = BFD_RELOC_8;
 874               else
 875                 abort ();
 876             }
 877
 878           /* Convert the size of the reloc into what fix_new_exp wants.  */
 879           reloc_size = reloc_size / 8;
 880           if (reloc_size == 8)
 881             reloc_size = 0;
 882           else if (reloc_size == 16)
 883             reloc_size = 1;
 884           else if (reloc_size == 32)
 885             reloc_size = 2;
 886
 887           fix_new_exp (frag_now, f - frag_now->fr_literal + offset, reloc_size,
 888                        &fixups[i].exp, pcrel,
 889                        ((bfd_reloc_code_real_type) reloc));
 890         }
 891     }
 892 }
 893
 894
 895 /* if while processing a fixup, a reloc really needs to be created */
 896 /* then it is done here */
 897
 898 arelent *
 899 tc_gen_reloc (seg, fixp)
 900      asection *seg;
 901      fixS *fixp;
 902 {
 903   arelent *reloc;
 904   reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent));
 905   reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym;
 906   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
 907   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
 908   if (reloc->howto == (reloc_howto_type *) NULL)
 909     {
 910       as_bad_where (fixp->fx_file, fixp->fx_line,
 911                     "reloc %d not supported by object file format", (int)fixp->fx_r_type);
 912       return NULL;
 913     }
 914   reloc->addend = fixp->fx_addnumber;
 915   /*  printf("tc_gen_reloc: addr=%x  addend=%x\n", reloc->address, reloc->addend); */
 916   return reloc;
 917 }
 918
 919 int
 920 md_estimate_size_before_relax (fragp, seg)
 921      fragS *fragp;
 922      asection *seg;
 923 {
 924   return 0;
 925 }
 926
 927 long
 928 md_pcrel_from (fixp)
 929      fixS *fixp;
 930 {
 931   if (fixp->fx_addsy != (symbolS *) NULL && ! S_IS_DEFINED (fixp->fx_addsy))
 932     {
 933       /* The symbol is undefined.  Let the linker figure it out.  */
 934       return 0;
 935     }
 936   return fixp->fx_frag->fr_address + fixp->fx_where;
 937 }
 938
 939 int
 940 md_apply_fix3 (fixp, valuep, seg)
 941      fixS *fixp;
 942      valueT *valuep;
 943      segT seg;
 944 {
 945   /* We shouldn't ever get here because linkrelax is nonzero.  */
 946   abort ();
 947   fixp->fx_done = 1;
 948   return 0;
 949 }
 950
 951 /* Insert an operand value into an instruction.  */
 952
 953 static void
 954 mn10300_insert_operand (insnp, extensionp, operand, val, file, line, shift)
 955      unsigned long *insnp;
 956      unsigned long *extensionp;
 957      const struct mn10300_operand *operand;
 958      offsetT val;
 959      char *file;
 960      unsigned int line;
 961      unsigned int shift;
 962 {
 963   /* No need to check 32bit operands for a bit.  Note that
 964      MN10300_OPERAND_SPLIT is an implicit 32bit operand.  */
 965   if (operand->bits != 32
 966       && (operand->flags & MN10300_OPERAND_SPLIT) == 0)
 967     {
 968       long min, max;
 969       offsetT test;
 970
 971       if ((operand->flags & MN10300_OPERAND_SIGNED) != 0)
 972         {
 973           max = (1 << (operand->bits - 1)) - 1;
 974           min = - (1 << (operand->bits - 1));
 975         }
 976       else
 977         {
 978           max = (1 << operand->bits) - 1;
 979           min = 0;
 980         }
 981
 982       test = val;
 983
 984
 985       if (test < (offsetT) min || test > (offsetT) max)
 986         {
 987           const char *err =
 988             "operand out of range (%s not between %ld and %ld)";
 989           char buf[100];
 990
 991           sprint_value (buf, test);
 992           if (file == (char *) NULL)
 993             as_warn (err, buf, min, max);
 994           else
 995             as_warn_where (file, line, err, buf, min, max);
 996         }
 997     }
 998
 999   if ((operand->flags & MN10300_OPERAND_SPLIT) != 0)
1000     {
1001       *insnp |= (val >> 32 - operand->bits) & ((1 << operand->bits) - 1);
1002       *extensionp |= ((val & ((1 << (32 - operand->bits)) - 1))
1003                       << operand->shift);
1004     }
1005   else if ((operand->flags & MN10300_OPERAND_EXTENDED) == 0)
1006     {
1007       *insnp |= (((long) val & ((1 << operand->bits) - 1))
1008                  << (operand->shift + shift));
1009
1010       if ((operand->flags & MN10300_OPERAND_REPEATED) != 0)
1011         *insnp |= (((long) val & ((1 << operand->bits) - 1))
1012                    << (operand->shift + shift + 2));
1013     }
1014   else
1015     {
1016       *extensionp |= (((long) val & ((1 << operand->bits) - 1))
1017                       << (operand->shift + shift));
1018
1019       if ((operand->flags & MN10300_OPERAND_REPEATED) != 0)
1020         *extensionp |= (((long) val & ((1 << operand->bits) - 1))
1021                         << (operand->shift + shift + 2));
1022     }
1023 }
1024
1025 static unsigned long
1026 check_operand (insn, operand, val)
1027      unsigned long insn;
1028      const struct mn10300_operand *operand;
1029      offsetT val;
1030 {
1031   /* No need to check 32bit operands for a bit.  Note that
1032      MN10300_OPERAND_SPLIT is an implicit 32bit operand.  */
1033   if (operand->bits != 32
1034       && (operand->flags & MN10300_OPERAND_SPLIT) == 0)
1035     {
1036       long min, max;
1037       offsetT test;
1038
1039       if ((operand->flags & MN10300_OPERAND_SIGNED) != 0)
1040         {
1041           max = (1 << (operand->bits - 1)) - 1;
1042           min = - (1 << (operand->bits - 1));
1043         }
1044       else
1045         {
1046           max = (1 << operand->bits) - 1;
1047           min = 0;
1048         }
1049
1050       test = val;
1051
1052
1053       if (test < (offsetT) min || test > (offsetT) max)
1054         return 0;
1055       else
1056         return 1;
1057     }
1058   return 1;
1059 }