opcodes/openrisc-asm.c

   1 /* Assembler interface for targets using CGEN. -*- C -*-
   2    CGEN: Cpu tools GENerator
   3
   4 THIS FILE IS MACHINE GENERATED WITH CGEN.
   5 - the resultant file is machine generated, cgen-asm.in isn't
   6
   7 Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
   8
   9 This file is part of the GNU Binutils and GDB, the GNU debugger.
  10
  11 This program is free software; you can redistribute it and/or modify
  12 it under the terms of the GNU General Public License as published by
  13 the Free Software Foundation; either version 2, or (at your option)
  14 any later version.
  15
  16 This program is distributed in the hope that it will be useful,
  17 but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 GNU General Public License for more details.
  20
  21 You should have received a copy of the GNU General Public License
  22 along with this program; if not, write to the Free Software Foundation, Inc.,
  23 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  24
  25 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
  26    Keep that in mind.  */
  27
  28 #include "sysdep.h"
  29 #include <ctype.h>
  30 #include <stdio.h>
  31 #include "ansidecl.h"
  32 #include "bfd.h"
  33 #include "symcat.h"
  34 #include "openrisc-desc.h"
  35 #include "openrisc-opc.h"
  36 #include "opintl.h"
  37 #include "xregex.h"
  38 #include "libiberty.h"
  39
  40 #undef min
  41 #define min(a,b) ((a) < (b) ? (a) : (b))
  42 #undef max
  43 #define max(a,b) ((a) > (b) ? (a) : (b))
  44
  45 static const char * parse_insn_normal
  46      PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *));
  47 \f
  48 /* -- assembler routines inserted here */
  49
  50 /* -- asm.c */
  51
  52 #define CGEN_VERBOSE_ASSEMBLER_ERRORS
  53
  54 static const char * parse_hi16
  55   PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *));
  56 static const char * parse_lo16
  57   PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *));
  58
  59 long
  60 openrisc_sign_extend_16bit (value)
  61      long value;
  62 {
  63   return (long) (short) value;
  64 }
  65
  66 /* Handle hi().  */
  67
  68 static const char *
  69 parse_hi16 (cd, strp, opindex, valuep)
  70      CGEN_CPU_DESC cd;
  71      const char **strp;
  72      int opindex;
  73      unsigned long *valuep;
  74 {
  75   const char *errmsg;
  76   enum cgen_parse_operand_result result_type;
  77   bfd_vma value;
  78
  79   if (**strp == '#')
  80     ++*strp;
  81
  82   if (strncasecmp (*strp, "hi(", 3) == 0)
  83     {
  84       *strp += 3;
  85
  86 #if 0
  87       errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
  88       if (errmsg != NULL)
  89         fprintf (stderr, "parse_hi: %s\n", errmsg);
  90       if (errmsg != NULL)
  91 #endif
  92         errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16,
  93                                      &result_type, &value);
  94       if (**strp != ')')
  95         return "missing `)'";
  96       ++*strp;
  97       if (errmsg == NULL
  98           && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
  99         value >>= 16;
 100       *valuep = (long) (short) value;
 101
 102       return errmsg;
 103     }
 104   else
 105     {
 106       if (**strp == '-')
 107         errmsg = cgen_parse_signed_integer (cd, strp, opindex, (long *) &value);
 108       else
 109         errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, (unsigned long *) &value);
 110     }
 111   *valuep = (long) (short) (value & 0xffff);
 112   return errmsg;
 113 }
 114
 115 /* Handle lo().  */
 116
 117 static const char *
 118 parse_lo16 (cd, strp, opindex, valuep)
 119      CGEN_CPU_DESC cd;
 120      const char **strp;
 121      int opindex;
 122      unsigned long *valuep;
 123 {
 124   const char *errmsg;
 125   enum cgen_parse_operand_result result_type;
 126   bfd_vma value;
 127
 128   if (**strp == '#')
 129     ++*strp;
 130
 131   if (strncasecmp (*strp, "lo(", 3) == 0)
 132     {
 133       *strp += 3;
 134
 135 #if 0
 136       errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
 137       if (errmsg != NULL)
 138         fprintf (stderr, "parse_lo: %s\n", errmsg);
 139
 140       if (errmsg != NULL)
 141 #endif
 142         errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
 143                                      &result_type, &value);
 144       if (**strp != ')')
 145         return "missing `)'";
 146       ++*strp;
 147       if (errmsg == NULL
 148           && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
 149         value &= 0xffff;
 150       *valuep = (long) (short) value;
 151
 152       return errmsg;
 153     }
 154
 155   if (**strp == '-')
 156     errmsg = cgen_parse_signed_integer (cd, strp, opindex, (long *) &value);
 157   else
 158     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, (unsigned long *) &value);
 159   *valuep = (long) (short) (value & 0xffff);
 160   return errmsg;
 161 }
 162
 163 /* -- */
 164
 165 const char * openrisc_cgen_parse_operand
 166   PARAMS ((CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *));
 167
 168 /* Main entry point for operand parsing.
 169
 170    This function is basically just a big switch statement.  Earlier versions
 171    used tables to look up the function to use, but
 172    - if the table contains both assembler and disassembler functions then
 173      the disassembler contains much of the assembler and vice-versa,
 174    - there's a lot of inlining possibilities as things grow,
 175    - using a switch statement avoids the function call overhead.
 176
 177    This function could be moved into `parse_insn_normal', but keeping it
 178    separate makes clear the interface between `parse_insn_normal' and each of
 179    the handlers.
 180 */
 181
 182 const char *
 183 openrisc_cgen_parse_operand (cd, opindex, strp, fields)
 184      CGEN_CPU_DESC cd;
 185      int opindex;
 186      const char ** strp;
 187      CGEN_FIELDS * fields;
 188 {
 189   const char * errmsg = NULL;
 190   /* Used by scalar operands that still need to be parsed.  */
 191   long junk ATTRIBUTE_UNUSED;
 192
 193   switch (opindex)
 194     {
 195     case OPENRISC_OPERAND_ABS_26 :
 196       {
 197         bfd_vma value;
 198         errmsg = cgen_parse_address (cd, strp, OPENRISC_OPERAND_ABS_26, 0, NULL,  & value);
 199         fields->f_abs26 = value;
 200       }
 201       break;
 202     case OPENRISC_OPERAND_DISP_26 :
 203       {
 204         bfd_vma value;
 205         errmsg = cgen_parse_address (cd, strp, OPENRISC_OPERAND_DISP_26, 0, NULL,  & value);
 206         fields->f_disp26 = value;
 207       }
 208       break;
 209     case OPENRISC_OPERAND_HI16 :
 210       errmsg = parse_hi16 (cd, strp, OPENRISC_OPERAND_HI16, &fields->f_simm16);
 211       break;
 212     case OPENRISC_OPERAND_LO16 :
 213       errmsg = parse_lo16 (cd, strp, OPENRISC_OPERAND_LO16, &fields->f_lo16);
 214       break;
 215     case OPENRISC_OPERAND_OP_F_23 :
 216       errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_OP_F_23, &fields->f_op4);
 217       break;
 218     case OPENRISC_OPERAND_OP_F_3 :
 219       errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_OP_F_3, &fields->f_op5);
 220       break;
 221     case OPENRISC_OPERAND_RA :
 222       errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r2);
 223       break;
 224     case OPENRISC_OPERAND_RB :
 225       errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r3);
 226       break;
 227     case OPENRISC_OPERAND_RD :
 228       errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r1);
 229       break;
 230     case OPENRISC_OPERAND_SIMM_16 :
 231       errmsg = cgen_parse_signed_integer (cd, strp, OPENRISC_OPERAND_SIMM_16, &fields->f_simm16);
 232       break;
 233     case OPENRISC_OPERAND_UI16NC :
 234       errmsg = parse_lo16 (cd, strp, OPENRISC_OPERAND_UI16NC, &fields->f_i16nc);
 235       break;
 236     case OPENRISC_OPERAND_UIMM_16 :
 237       errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_UIMM_16, &fields->f_uimm16);
 238       break;
 239     case OPENRISC_OPERAND_UIMM_5 :
 240       errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_UIMM_5, &fields->f_uimm5);
 241       break;
 242
 243     default :
 244       /* xgettext:c-format */
 245       fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
 246       abort ();
 247   }
 248
 249   return errmsg;
 250 }
 251
 252 cgen_parse_fn * const openrisc_cgen_parse_handlers[] =
 253 {
 254   parse_insn_normal,
 255 };
 256
 257 void
 258 openrisc_cgen_init_asm (cd)
 259      CGEN_CPU_DESC cd;
 260 {
 261   openrisc_cgen_init_opcode_table (cd);
 262   openrisc_cgen_init_ibld_table (cd);
 263   cd->parse_handlers = & openrisc_cgen_parse_handlers[0];
 264   cd->parse_operand = openrisc_cgen_parse_operand;
 265 }
 266
 267 \f
 268
 269 /*
 270   Regex construction routine.
 271
 272   This translates an opcode syntax string into a regex string,
 273   by replacing any non-character syntax element (such as an
 274   opcode) with the pattern '.*'
 275
 276   It then compiles the regex and stores it in the opcode, for
 277   later use by openrisc_cgen_assemble_insn
 278
 279   Returns NULL for success, an error message for failure. */
 280
 281 char *
 282 openrisc_cgen_build_insn_regex (insn)
 283      CGEN_INSN *insn;
 284 {
 285   CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
 286   const char *mnem = CGEN_INSN_MNEMONIC (insn);
 287   int mnem_len;
 288   char rxbuf[CGEN_MAX_RX_ELEMENTS];
 289   char *rx = rxbuf;
 290   const CGEN_SYNTAX_CHAR_TYPE *syn;
 291   int reg_err;
 292
 293   syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
 294
 295   /* Mnemonics come first in the syntax string  */
 296   if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) return "missing mnemonic in syntax string";
 297   ++syn;
 298
 299   /* copy the literal mnemonic out of the insn */
 300   memset (rx, 0, CGEN_MAX_RX_ELEMENTS);
 301   mnem_len = strlen(mnem);
 302   memcpy (rx, mnem, mnem_len);
 303   rx += mnem_len;
 304
 305   /* copy any remaining literals from the syntax string into the rx */
 306   for(; * syn != 0 && rx < rxbuf + (CGEN_MAX_RX_ELEMENTS - 9); ++syn, ++rx)
 307     {
 308       if (CGEN_SYNTAX_CHAR_P (* syn))
 309         {
 310          char tmp = CGEN_SYNTAX_CHAR (* syn);
 311          switch (tmp)
 312            {
 313              /* escape any regex metacharacters in the syntax */
 314            case '.': case '[': case '\\':
 315            case '*': case '^': case '$':
 316
 317 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
 318            case '?': case '{': case '}':
 319            case '(': case ')': case '*':
 320            case '|': case '+': case ']':
 321 #endif
 322
 323              * rx++ = '\\';
 324              break;
 325            }
 326          /* insert syntax char into rx */
 327         * rx = tmp;
 328         }
 329       else
 330         {
 331           /* replace non-syntax fields with globs */
 332           * rx = '.';
 333           * ++rx = '*';
 334         }
 335     }
 336
 337   /* trailing whitespace ok */
 338   * rx++ = '[';
 339   * rx++ = ' ';
 340   * rx++ = '\t';
 341   * rx++ = ']';
 342   * rx++ = '*';
 343
 344   /* but anchor it after that */
 345   * rx++ = '$';
 346   * rx = '\0';
 347
 348   CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
 349   reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB|REG_ICASE);
 350
 351   if (reg_err == 0)
 352     return NULL;
 353   else
 354     {
 355       static char msg[80];
 356       regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
 357       regfree ((regex_t *) CGEN_INSN_RX (insn));
 358       free (CGEN_INSN_RX (insn));
 359       (CGEN_INSN_RX (insn)) = NULL;
 360     return msg;
 361     }
 362 }
 363
 364 \f
 365 /* Default insn parser.
 366
 367    The syntax string is scanned and operands are parsed and stored in FIELDS.
 368    Relocs are queued as we go via other callbacks.
 369
 370    ??? Note that this is currently an all-or-nothing parser.  If we fail to
 371    parse the instruction, we return 0 and the caller will start over from
 372    the beginning.  Backtracking will be necessary in parsing subexpressions,
 373    but that can be handled there.  Not handling backtracking here may get
 374    expensive in the case of the m68k.  Deal with later.
 375
 376    Returns NULL for success, an error message for failure.
 377 */
 378
 379 static const char *
 380 parse_insn_normal (cd, insn, strp, fields)
 381      CGEN_CPU_DESC cd;
 382      const CGEN_INSN *insn;
 383      const char **strp;
 384      CGEN_FIELDS *fields;
 385 {
 386   /* ??? Runtime added insns not handled yet.  */
 387   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 388   const char *str = *strp;
 389   const char *errmsg;
 390   const char *p;
 391   const CGEN_SYNTAX_CHAR_TYPE * syn;
 392 #ifdef CGEN_MNEMONIC_OPERANDS
 393   /* FIXME: wip */
 394   int past_opcode_p;
 395 #endif
 396
 397   /* For now we assume the mnemonic is first (there are no leading operands).
 398      We can parse it without needing to set up operand parsing.
 399      GAS's input scrubber will ensure mnemonics are lowercase, but we may
 400      not be called from GAS.  */
 401   p = CGEN_INSN_MNEMONIC (insn);
 402   while (*p && tolower (*p) == tolower (*str))
 403     ++p, ++str;
 404
 405   if (* p)
 406     return _("unrecognized instruction");
 407
 408 #ifndef CGEN_MNEMONIC_OPERANDS
 409   if (* str && !isspace (* str))
 410     return _("unrecognized instruction");
 411 #endif
 412
 413   CGEN_INIT_PARSE (cd);
 414   cgen_init_parse_operand (cd);
 415 #ifdef CGEN_MNEMONIC_OPERANDS
 416   past_opcode_p = 0;
 417 #endif
 418
 419   /* We don't check for (*str != '\0') here because we want to parse
 420      any trailing fake arguments in the syntax string.  */
 421   syn = CGEN_SYNTAX_STRING (syntax);
 422
 423   /* Mnemonics come first for now, ensure valid string.  */
 424   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
 425     abort ();
 426
 427   ++syn;
 428
 429   while (* syn != 0)
 430     {
 431       /* Non operand chars must match exactly.  */
 432       if (CGEN_SYNTAX_CHAR_P (* syn))
 433         {
 434           /* FIXME: While we allow for non-GAS callers above, we assume the
 435              first char after the mnemonic part is a space.  */
 436           /* FIXME: We also take inappropriate advantage of the fact that
 437              GAS's input scrubber will remove extraneous blanks.  */
 438           if (tolower (*str) == tolower (CGEN_SYNTAX_CHAR (* syn)))
 439             {
 440 #ifdef CGEN_MNEMONIC_OPERANDS
 441               if (CGEN_SYNTAX_CHAR(* syn) == ' ')
 442                 past_opcode_p = 1;
 443 #endif
 444               ++ syn;
 445               ++ str;
 446             }
 447           else if (*str)
 448             {
 449               /* Syntax char didn't match.  Can't be this insn.  */
 450               static char msg [80];
 451               /* xgettext:c-format */
 452               sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
 453                        CGEN_SYNTAX_CHAR(*syn), *str);
 454               return msg;
 455             }
 456           else
 457             {
 458               /* Ran out of input.  */
 459               static char msg [80];
 460               /* xgettext:c-format */
 461               sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
 462                        CGEN_SYNTAX_CHAR(*syn));
 463               return msg;
 464             }
 465           continue;
 466         }
 467
 468       /* We have an operand of some sort.  */
 469       errmsg = openrisc_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
 470                                           &str, fields);
 471       if (errmsg)
 472         return errmsg;
 473
 474       /* Done with this operand, continue with next one.  */
 475       ++ syn;
 476     }
 477
 478   /* If we're at the end of the syntax string, we're done.  */
 479   if (* syn == 0)
 480     {
 481       /* FIXME: For the moment we assume a valid `str' can only contain
 482          blanks now.  IE: We needn't try again with a longer version of
 483          the insn and it is assumed that longer versions of insns appear
 484          before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
 485       while (isspace (* str))
 486         ++ str;
 487
 488       if (* str != '\0')
 489         return _("junk at end of line"); /* FIXME: would like to include `str' */
 490
 491       return NULL;
 492     }
 493
 494   /* We couldn't parse it.  */
 495   return _("unrecognized instruction");
 496 }
 497 \f
 498 /* Main entry point.
 499    This routine is called for each instruction to be assembled.
 500    STR points to the insn to be assembled.
 501    We assume all necessary tables have been initialized.
 502    The assembled instruction, less any fixups, is stored in BUF.
 503    Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
 504    still needs to be converted to target byte order, otherwise BUF is an array
 505    of bytes in target byte order.
 506    The result is a pointer to the insn's entry in the opcode table,
 507    or NULL if an error occured (an error message will have already been
 508    printed).
 509
 510    Note that when processing (non-alias) macro-insns,
 511    this function recurses.
 512
 513    ??? It's possible to make this cpu-independent.
 514    One would have to deal with a few minor things.
 515    At this point in time doing so would be more of a curiosity than useful
 516    [for example this file isn't _that_ big], but keeping the possibility in
 517    mind helps keep the design clean.  */
 518
 519 const CGEN_INSN *
 520 openrisc_cgen_assemble_insn (cd, str, fields, buf, errmsg)
 521      CGEN_CPU_DESC cd;
 522      const char *str;
 523      CGEN_FIELDS *fields;
 524      CGEN_INSN_BYTES_PTR buf;
 525      char **errmsg;
 526 {
 527   const char *start;
 528   CGEN_INSN_LIST *ilist;
 529   const char *parse_errmsg = NULL;
 530   const char *insert_errmsg = NULL;
 531   int recognized_mnemonic = 0;
 532
 533   /* Skip leading white space.  */
 534   while (isspace (* str))
 535     ++ str;
 536
 537   /* The instructions are stored in hashed lists.
 538      Get the first in the list.  */
 539   ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
 540
 541   /* Keep looking until we find a match.  */
 542
 543   start = str;
 544   for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
 545     {
 546       const CGEN_INSN *insn = ilist->insn;
 547       recognized_mnemonic = 1;
 548
 549 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
 550       /* not usually needed as unsupported opcodes shouldn't be in the hash lists */
 551       /* Is this insn supported by the selected cpu?  */
 552       if (! openrisc_cgen_insn_supported (cd, insn))
 553         continue;
 554 #endif
 555
 556       /* If the RELAX attribute is set, this is an insn that shouldn't be
 557          chosen immediately.  Instead, it is used during assembler/linker
 558          relaxation if possible.  */
 559       if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0)
 560         continue;
 561
 562       str = start;
 563
 564       /* skip this insn if str doesn't look right lexically */
 565       if (CGEN_INSN_RX (insn) != NULL &&
 566           regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
 567         continue;
 568
 569       /* Allow parse/insert handlers to obtain length of insn.  */
 570       CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
 571
 572       parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
 573       if (parse_errmsg != NULL)
 574         continue;
 575
 576       /* ??? 0 is passed for `pc' */
 577       insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
 578                                                  (bfd_vma) 0);
 579       if (insert_errmsg != NULL)
 580         continue;
 581
 582       /* It is up to the caller to actually output the insn and any
 583          queued relocs.  */
 584       return insn;
 585     }
 586
 587   {
 588     static char errbuf[150];
 589 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
 590     const char *tmp_errmsg;
 591
 592     /* If requesting verbose error messages, use insert_errmsg.
 593        Failing that, use parse_errmsg */
 594     tmp_errmsg = (insert_errmsg ? insert_errmsg :
 595                   parse_errmsg ? parse_errmsg :
 596                   recognized_mnemonic ? _("unrecognized form of instruction") :
 597                   _("unrecognized instruction"));
 598
 599     if (strlen (start) > 50)
 600       /* xgettext:c-format */
 601       sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
 602     else
 603       /* xgettext:c-format */
 604       sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
 605 #else
 606     if (strlen (start) > 50)
 607       /* xgettext:c-format */
 608       sprintf (errbuf, _("bad instruction `%.50s...'"), start);
 609     else
 610       /* xgettext:c-format */
 611       sprintf (errbuf, _("bad instruction `%.50s'"), start);
 612 #endif
 613
 614     *errmsg = errbuf;
 615     return NULL;
 616   }
 617 }
 618 \f
 619 #if 0 /* This calls back to GAS which we can't do without care.  */
 620
 621 /* Record each member of OPVALS in the assembler's symbol table.
 622    This lets GAS parse registers for us.
 623    ??? Interesting idea but not currently used.  */
 624
 625 /* Record each member of OPVALS in the assembler's symbol table.
 626    FIXME: Not currently used.  */
 627
 628 void
 629 openrisc_cgen_asm_hash_keywords (cd, opvals)
 630      CGEN_CPU_DESC cd;
 631      CGEN_KEYWORD *opvals;
 632 {
 633   CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
 634   const CGEN_KEYWORD_ENTRY * ke;
 635
 636   while ((ke = cgen_keyword_search_next (& search)) != NULL)
 637     {
 638 #if 0 /* Unnecessary, should be done in the search routine.  */
 639       if (! openrisc_cgen_opval_supported (ke))
 640         continue;
 641 #endif
 642       cgen_asm_record_register (cd, ke->name, ke->value);
 643     }
 644 }
 645
 646 #endif /* 0 */