gas/config/tc-v850.c

   1 /* tc-v850.c -- Assembler code for the NEC V850
   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/v850.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 /* local functions */
  56 static unsigned long v850_insert_operand
  57   PARAMS ((unsigned long insn, const struct v850_operand *operand,
  58            offsetT val, char *file, unsigned int line));
  59 static int reg_name_search PARAMS ((char *name, const struct reg_name *, int));
  60 static boolean register_name PARAMS ((expressionS *expressionP));
  61 static boolean system_register_name PARAMS ((expressionS *expressionP));
  62 static int postfix PARAMS ((char *p));
  63 static bfd_reloc_code_real_type get_reloc PARAMS ((struct v850_operand *op));
  64 static unsigned long build_insn PARAMS ((struct v850_opcode *opcode, expressionS *opers));
  65
  66
  67 /* fixups */
  68 #define MAX_INSN_FIXUPS (5)
  69 struct v850_fixup
  70 {
  71   expressionS exp;
  72   int opindex;
  73   bfd_reloc_code_real_type reloc;
  74 };
  75 struct v850_fixup fixups[MAX_INSN_FIXUPS];
  76 static int fc;
  77 \f
  78 const char *md_shortopts = "";
  79 struct option md_longopts[] = {
  80   {NULL, no_argument, NULL, 0}
  81 };
  82 size_t md_longopts_size = sizeof(md_longopts);
  83
  84 /* The target specific pseudo-ops which we support.  */
  85 const pseudo_typeS md_pseudo_table[] =
  86 {
  87   /*
  88   { "byte",     ppc_byte,       0 },
  89   { "long",     ppc_elf_cons,   4 },
  90   { "word",     ppc_elf_cons,   2 },
  91   { "short",    ppc_elf_cons,   2 },
  92   { "rdata",    ppc_elf_rdata,  0 },
  93   { "rodata",   ppc_elf_rdata,  0 },
  94   { "lcomm",    ppc_elf_lcomm,  0 },
  95   */
  96   { NULL,       NULL,           0 }
  97 };
  98
  99 /* Opcode hash table.  */
 100 static struct hash_control *v850_hash;
 101
 102 /* This table is sorted. Suitable for searching by a binary search. */
 103 static const struct reg_name pre_defined_registers[] =
 104 {
 105   { "ep", 30 },                 /* ep - element ptr */
 106   { "gp", 4 },                  /* gp - global ptr */
 107   { "lp", 31 },                 /* lp - link ptr */
 108   { "r0", 0 },
 109   { "r1", 1 },
 110   { "r10", 10 },
 111   { "r11", 11 },
 112   { "r12", 12 },
 113   { "r13", 13 },
 114   { "r14", 14 },
 115   { "r15", 15 },
 116   { "r16", 16 },
 117   { "r17", 17 },
 118   { "r18", 18 },
 119   { "r19", 19 },
 120   { "r2", 2 },
 121   { "r20", 20 },
 122   { "r21", 21 },
 123   { "r22", 22 },
 124   { "r23", 23 },
 125   { "r24", 24 },
 126   { "r25", 25 },
 127   { "r26", 26 },
 128   { "r27", 27 },
 129   { "r28", 28 },
 130   { "r29", 29 },
 131   { "r3", 3 },
 132   { "r30", 30 },
 133   { "r31", 31 },
 134   { "r4", 4 },
 135   { "r5", 5 },
 136   { "r6", 6 },
 137   { "r7", 7 },
 138   { "r8", 8 },
 139   { "r9", 9 },
 140   { "sp", 3 },                  /* sp - stack ptr */
 141   { "tp", 5 },                  /* tp - text ptr */
 142   { "zero", 0 },
 143 };
 144 #define REG_NAME_CNT    (sizeof(pre_defined_registers) / sizeof(struct reg_name))
 145
 146
 147 static const struct reg_name system_registers[] =
 148 {
 149   { "eipc", 0 },
 150   { "eipsw", 1 },
 151   { "fepc", 2 },
 152   { "fepsw", 3 },
 153   { "ecr", 4 },
 154   { "psw", 5 },
 155 };
 156 #define SYSREG_NAME_CNT (sizeof(system_registers) / sizeof(struct reg_name))
 157
 158 static const struct reg_name cc_names[] =
 159 {
 160   { "c", 0x1 },
 161   { "ge", 0xe },
 162   { "gt", 0xf },
 163   { "h", 0xb },
 164   { "l", 0x1 },
 165   { "le", 0x7 },
 166   { "lt", 0x6 },
 167   { "n", 0x4 },
 168   { "nc", 0x9 },
 169   { "nh", 0x3 },
 170   { "nl", 0x9 },
 171   { "ns", 0xc },
 172   { "nv", 0x8 },
 173   { "nz", 0xa },
 174   { "p",  0xc },
 175   { "s", 0x4 },
 176   { "sa", 0xd },
 177   { "t", 0x5 },
 178   { "v", 0x0 },
 179   { "z", 0x2 },
 180 };
 181
 182 /* reg_name_search does a binary search of the given register table
 183    to see if "name" is a valid regiter name.  Returns the register
 184    number from the array on success, or -1 on failure. */
 185
 186 static int
 187 reg_name_search (name, table, high)
 188      char *name;
 189      const struct reg_name *table;
 190      int high;
 191 {
 192   int middle, low;
 193   int cmp;
 194
 195   low = 0;
 196   do
 197     {
 198       middle = (low + high) / 2;
 199       cmp = strcasecmp (name, table[middle].name);
 200       if (cmp < 0)
 201         high = middle - 1;
 202       else if (cmp > 0)
 203         low = middle + 1;
 204       else
 205           return table[middle].value;
 206     }
 207   while (low <= high);
 208   return -1;
 209 }
 210
 211
 212 /* Summary of register_name().
 213  *
 214  * in: Input_line_pointer points to 1st char of operand.
 215  *
 216  * out: A expressionS.
 217  *      The operand may have been a register: in this case, X_op == O_register,
 218  *      X_add_number is set to the register number, and truth is returned.
 219  *      Input_line_pointer->(next non-blank) char after operand, or is in
 220  *      its original state.
 221  */
 222 static boolean
 223 register_name (expressionP)
 224      expressionS *expressionP;
 225 {
 226   int reg_number;
 227   char *name;
 228   char *start;
 229   char c;
 230
 231   /* Find the spelling of the operand */
 232   start = name = input_line_pointer;
 233
 234   c = get_symbol_end ();
 235   reg_number = reg_name_search (name, pre_defined_registers, REG_NAME_CNT - 1);
 236
 237   /* look to see if it's in the register table */
 238   if (reg_number >= 0)
 239     {
 240       expressionP->X_op = O_register;
 241       expressionP->X_add_number = reg_number;
 242
 243       /* make the rest nice */
 244       expressionP->X_add_symbol = NULL;
 245       expressionP->X_op_symbol = NULL;
 246       *input_line_pointer = c;  /* put back the delimiting char */
 247       return true;
 248     }
 249   else
 250     {
 251       /* reset the line as if we had not done anything */
 252       *input_line_pointer = c;   /* put back the delimiting char */
 253       input_line_pointer = start; /* reset input_line pointer */
 254       return false;
 255     }
 256 }
 257
 258 /* Summary of system_register_name().
 259  *
 260  * in: Input_line_pointer points to 1st char of operand.
 261  *
 262  * out: A expressionS.
 263  *      The operand may have been a register: in this case, X_op == O_register,
 264  *      X_add_number is set to the register number, and truth is returned.
 265  *      Input_line_pointer->(next non-blank) char after operand, or is in
 266  *      its original state.
 267  */
 268 static boolean
 269 system_register_name (expressionP)
 270      expressionS *expressionP;
 271 {
 272   int reg_number;
 273   char *name;
 274   char *start;
 275   char c;
 276
 277   /* Find the spelling of the operand */
 278   start = name = input_line_pointer;
 279
 280   c = get_symbol_end ();
 281   reg_number = reg_name_search (name, system_registers, SYSREG_NAME_CNT - 1);
 282
 283   /* look to see if it's in the register table */
 284   if (reg_number >= 0)
 285     {
 286       expressionP->X_op = O_register;
 287       expressionP->X_add_number = reg_number;
 288
 289       /* make the rest nice */
 290       expressionP->X_add_symbol = NULL;
 291       expressionP->X_op_symbol = NULL;
 292       *input_line_pointer = c;  /* put back the delimiting char */
 293       return true;
 294     }
 295   else
 296     {
 297       /* reset the line as if we had not done anything */
 298       *input_line_pointer = c;   /* put back the delimiting char */
 299       input_line_pointer = start; /* reset input_line pointer */
 300       return false;
 301     }
 302 }
 303
 304 void
 305 md_show_usage (stream)
 306   FILE *stream;
 307 {
 308   fprintf(stream, "V850 options:\n\
 309 none yet\n");
 310 }
 311
 312 int
 313 md_parse_option (c, arg)
 314      int c;
 315      char *arg;
 316 {
 317   return 0;
 318 }
 319
 320 symbolS *
 321 md_undefined_symbol (name)
 322   char *name;
 323 {
 324   return 0;
 325 }
 326
 327 char *
 328 md_atof (type, litp, sizep)
 329   int type;
 330   char *litp;
 331   int *sizep;
 332 {
 333   int prec;
 334   LITTLENUM_TYPE words[4];
 335   char *t;
 336   int i;
 337
 338   switch (type)
 339     {
 340     case 'f':
 341       prec = 2;
 342       break;
 343
 344     case 'd':
 345       prec = 4;
 346       break;
 347
 348     default:
 349       *sizep = 0;
 350       return "bad call to md_atof";
 351     }
 352
 353   t = atof_ieee (input_line_pointer, type, words);
 354   if (t)
 355     input_line_pointer = t;
 356
 357   *sizep = prec * 2;
 358
 359   for (i = prec - 1; i >= 0; i--)
 360     {
 361       md_number_to_chars (litp, (valueT) words[i], 2);
 362       litp += 2;
 363     }
 364
 365   return NULL;
 366 }
 367
 368
 369 void
 370 md_convert_frag (abfd, sec, fragP)
 371   bfd *abfd;
 372   asection *sec;
 373   fragS *fragP;
 374 {
 375   /* printf ("call to md_convert_frag \n"); */
 376   abort ();
 377 }
 378
 379 valueT
 380 md_section_align (seg, addr)
 381      asection *seg;
 382      valueT addr;
 383 {
 384   int align = bfd_get_section_alignment (stdoutput, seg);
 385   return ((addr + (1 << align) - 1) & (-1 << align));
 386 }
 387
 388 void
 389 md_begin ()
 390 {
 391   char *prev_name = "";
 392   register const struct v850_opcode *op;
 393   const struct v850_opcode *op_end;
 394
 395   v850_hash = hash_new();
 396
 397   /* Insert unique names into hash table.  The V850 instruction set
 398      has many identical opcode names that have different opcodes based
 399      on the operands.  This hash table then provides a quick index to
 400      the first opcode with a particular name in the opcode table.  */
 401
 402   op     = v850_opcodes;
 403   op_end = v850_opcodes + v850_num_opcodes;
 404
 405   for (; op < op_end; op++)
 406     {
 407       if (strcmp (prev_name, op->name))
 408         {
 409           prev_name = (char *) op->name;
 410           hash_insert (v850_hash, op->name, (char *) op);
 411         }
 412     }
 413 }
 414
 415
 416 static bfd_reloc_code_real_type
 417 get_reloc (op)
 418      struct v850_operand *op;
 419 {
 420   abort ();
 421 }
 422
 423
 424 void
 425 md_assemble (str)
 426      char *str;
 427 {
 428   char *s;
 429   struct v850_opcode *opcode;
 430   struct v850_opcode *next_opcode;
 431   const unsigned char *opindex_ptr;
 432   int next_opindex;
 433   unsigned long insn;
 434   char *f;
 435   int i;
 436   int numops;
 437   int match;
 438
 439   int numopts;
 440   expressionS myops[5];
 441
 442   /* Get the opcode.  */
 443   for (s = str; *s != '\0' && ! isspace (*s); s++)
 444     ;
 445   if (*s != '\0')
 446     *s++ = '\0';
 447
 448   /* find the first opcode with the proper name */
 449   opcode = (struct v850_opcode *)hash_find (v850_hash, str);
 450   if (opcode == NULL)
 451     {
 452       as_bad ("Unrecognized opcode: `%s'", str);
 453       return;
 454     }
 455
 456   str = s;
 457   while (isspace (*str))
 458     ++str;
 459
 460   input_line_pointer = str;
 461
 462   for(;;)
 463     {
 464       const char *errmsg = NULL;
 465
 466       fc = 0;
 467       match = 0;
 468       next_opindex = 0;
 469       insn = opcode->opcode;
 470       for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++)
 471         {
 472           const struct v850_operand *operand;
 473           char *hold;
 474           expressionS ex;
 475           char endc;
 476
 477           if (next_opindex == 0)
 478             {
 479               operand = &v850_operands[*opindex_ptr];
 480             }
 481           else
 482             {
 483               operand = &v850_operands[next_opindex];
 484               next_opindex = 0;
 485             }
 486
 487           errmsg = NULL;
 488
 489           while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
 490             ++str;
 491
 492           /* Gather the operand. */
 493           hold = input_line_pointer;
 494           input_line_pointer = str;
 495
 496           if ((operand->flags & V850_OPERAND_REG) != 0)
 497             {
 498               if (!register_name(&ex))
 499                 {
 500                   errmsg = "invalid register name";
 501                   goto error;
 502                 }
 503             }
 504           else if ((operand->flags & V850_OPERAND_SRG) != 0)
 505             {
 506               if (!system_register_name(&ex))
 507                 {
 508                   errmsg = "invalid system register name";
 509                   goto error;
 510                 }
 511             }
 512           else if (strncmp(input_line_pointer, "lo(", 3) == 0)
 513             {
 514               input_line_pointer += 3;
 515               expression(&ex);
 516
 517               if (*input_line_pointer++ != ')')
 518                 {
 519                   errmsg = "syntax error: expected `)'";
 520                   goto error;
 521                 }
 522
 523               if (ex.X_op == O_constant)
 524                 ex.X_add_number &= 0xffff;
 525               else
 526                 {
 527                   if (fc > MAX_INSN_FIXUPS)
 528                     as_fatal ("too many fixups");
 529
 530                   fixups[fc].exp = ex;
 531                   fixups[fc].opindex = *opindex_ptr;
 532                   fixups[fc].reloc = BFD_RELOC_LO16;
 533                   fc++;
 534                 }
 535             }
 536           else if (strncmp(input_line_pointer, "hi(", 3) == 0)
 537             {
 538               input_line_pointer += 3;
 539               expression(&ex);
 540
 541               if (*input_line_pointer++ != ')')
 542                 {
 543                   errmsg = "syntax error: expected `)'";
 544                   goto error;
 545                 }
 546
 547               if (ex.X_op == O_constant)
 548                 ex.X_add_number = (ex.X_add_number >> 16) & 0xffff;
 549               else
 550                 {
 551                   if (fc > MAX_INSN_FIXUPS)
 552                     as_fatal ("too many fixups");
 553
 554                   fixups[fc].exp = ex;
 555                   fixups[fc].opindex = *opindex_ptr;
 556                   fixups[fc].reloc = BFD_RELOC_HI16;
 557                   fc++;
 558                 }
 559             }
 560           else if (register_name (&ex)
 561                    && (operand->flags & V850_OPERAND_REG) == 0)
 562             {
 563               errmsg = "syntax error: register not expected";
 564               goto error;
 565             }
 566           else if (system_register_name (&ex)
 567                    && (operand->flags & V850_OPERAND_SRG) == 0)
 568             {
 569               errmsg = "syntax error: system register not expected";
 570               goto error;
 571             }
 572           else
 573             {
 574                 expression(&ex);
 575             }
 576
 577           str = input_line_pointer;
 578           input_line_pointer = hold;
 579
 580           switch (ex.X_op)
 581             {
 582             case O_illegal:
 583               errmsg = "illegal operand";
 584               goto error;
 585             case O_absent:
 586               errmsg = "missing operand";
 587               goto error;
 588             case O_register:
 589               if ((operand->flags & (V850_OPERAND_REG | V850_OPERAND_SRG)) == 0)
 590                 {
 591                   errmsg = "invalid operand";
 592                   goto error;
 593                 }
 594
 595               insn = v850_insert_operand (insn, operand, ex.X_add_number,
 596                                           (char *) NULL, 0);
 597               break;
 598
 599             case O_constant:
 600               insn = v850_insert_operand (insn, operand, ex.X_add_number,
 601                                           (char *) NULL, 0);
 602               break;
 603
 604             default:
 605               /* We need to generate a fixup for this expression.  */
 606               if (fc >= MAX_INSN_FIXUPS)
 607                 as_fatal ("too many fixups");
 608               fixups[fc].exp = ex;
 609               fixups[fc].opindex = *opindex_ptr;
 610               fixups[fc].reloc = BFD_RELOC_UNUSED;
 611               ++fc;
 612               break;
 613             }
 614
 615           while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
 616             ++str;
 617         }
 618       match = 1;
 619
 620     error:
 621       if (match == 0)
 622         {
 623           next_opcode = opcode + 1;
 624           if (next_opcode->opcode != 0 && !strcmp(next_opcode->name, opcode->name))
 625             {
 626               opcode = next_opcode;
 627               continue;
 628             }
 629
 630           as_bad ("%s", errmsg);
 631           return;
 632         }
 633       break;
 634     }
 635
 636   while (isspace (*str))
 637     ++str;
 638
 639   if (*str != '\0')
 640     as_bad ("junk at end of line: `%s'", str);
 641
 642   input_line_pointer = str;
 643
 644   f = frag_more (opcode->size);
 645   md_number_to_chars (f, insn, opcode->size);
 646 }
 647
 648
 649 /* if while processing a fixup, a reloc really needs to be created */
 650 /* then it is done here */
 651
 652 arelent *
 653 tc_gen_reloc (seg, fixp)
 654      asection *seg;
 655      fixS *fixp;
 656 {
 657   arelent *reloc;
 658   reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent));
 659   reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym;
 660   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
 661   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
 662   if (reloc->howto == (reloc_howto_type *) NULL)
 663     {
 664       as_bad_where (fixp->fx_file, fixp->fx_line,
 665                     "reloc %d not supported by object file format", (int)fixp->fx_r_type);
 666       return NULL;
 667     }
 668   reloc->addend = fixp->fx_addnumber;
 669   /*  printf("tc_gen_reloc: addr=%x  addend=%x\n", reloc->address, reloc->addend); */
 670   return reloc;
 671 }
 672
 673 int
 674 md_estimate_size_before_relax (fragp, seg)
 675      fragS *fragp;
 676      asection *seg;
 677 {
 678   abort ();
 679   return 0;
 680 }
 681
 682 long
 683 md_pcrel_from_section (fixp, sec)
 684      fixS *fixp;
 685      segT sec;
 686 {
 687     return 0;
 688     /*  return fixp->fx_frag->fr_address + fixp->fx_where; */
 689 }
 690
 691 int
 692 md_apply_fix3 (fixp, valuep, seg)
 693      fixS *fixp;
 694      valueT *valuep;
 695      segT seg;
 696 {
 697   abort();
 698 #if 0
 699   valueT value;
 700   char *where;
 701   unsigned long insn;
 702   int op_type;
 703
 704   if (fixp->fx_addsy == (symbolS *) NULL)
 705     {
 706       value = *valuep;
 707       fixp->fx_done = 1;
 708     }
 709   else if (fixp->fx_pcrel)
 710     value = *valuep;
 711   else
 712     {
 713       value = fixp->fx_offset;
 714       if (fixp->fx_subsy != (symbolS *) NULL)
 715         {
 716           if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section)
 717             value -= S_GET_VALUE (fixp->fx_subsy);
 718           else
 719             {
 720               /* We don't actually support subtracting a symbol.  */
 721               as_bad_where (fixp->fx_file, fixp->fx_line,
 722                             "expression too complex");
 723             }
 724         }
 725     }
 726
 727   /*   printf("md_apply_fix: value=0x%x  type=%d\n",  value, fixp->fx_r_type); */
 728
 729   op_type = fixp->fx_r_type;
 730   fixp->fx_r_type = get_reloc((struct v850_operand *)&v850_operands[op_type]);
 731
 732   /*  printf("reloc=%d\n",fixp->fx_r_type); */
 733
 734   /* Fetch the instruction, insert the fully resolved operand
 735      value, and stuff the instruction back again.  */
 736   where = fixp->fx_frag->fr_literal + fixp->fx_where;
 737   insn = bfd_getb32 ((unsigned char *) where);
 738   /* printf("   insn=%x  value=%x\n",insn,value); */
 739
 740   insn = v850_insert_operand (insn, op_type, (offsetT) value);
 741
 742   /* printf("   new insn=%x\n",insn); */
 743
 744   bfd_putb32 ((bfd_vma) insn, (unsigned char *) where);
 745
 746   if (fixp->fx_done)
 747     return 1;
 748
 749   fixp->fx_addnumber = value;
 750   return 1;
 751 #endif
 752 }
 753
 754 \f
 755 /* Insert an operand value into an instruction.  */
 756
 757 static unsigned long
 758 v850_insert_operand (insn, operand, val, file, line)
 759      unsigned long insn;
 760      const struct v850_operand *operand;
 761      offsetT val;
 762      char *file;
 763      unsigned int line;
 764 {
 765   if (operand->bits != 32)
 766     {
 767       long min, max;
 768       offsetT test;
 769
 770       if ((operand->flags & V850_OPERAND_SIGNED) != 0)
 771         {
 772 #if 0
 773           if ((operand->flags & PPC_OPERAND_SIGNOPT) != 0
 774               && ppc_size == PPC_OPCODE_32)
 775             max = (1 << operand->bits) - 1;
 776           else
 777 #endif
 778             max = (1 << (operand->bits - 1)) - 1;
 779           min = - (1 << (operand->bits - 1));
 780         }
 781       else
 782         {
 783           max = (1 << operand->bits) - 1;
 784           min = 0;
 785         }
 786
 787 #if 0
 788       if ((operand->flags & PPC_OPERAND_NEGATIVE) != 0)
 789         test = - val;
 790       else
 791 #endif
 792         test = val;
 793
 794
 795       if (test < (offsetT) min || test > (offsetT) max)
 796         {
 797           const char *err =
 798             "operand out of range (%s not between %ld and %ld)";
 799           char buf[100];
 800
 801           sprint_value (buf, test);
 802           if (file == (char *) NULL)
 803             as_warn (err, buf, min, max);
 804           else
 805             as_warn_where (file, line, err, buf, min, max);
 806         }
 807     }
 808
 809   insn |= (((long) val & ((1 << operand->bits) - 1)) << operand->shift);
 810   return insn;
 811 }