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 <stdio.h>
  30 #include "ansidecl.h"
  31 #include "bfd.h"
  32 #include "symcat.h"
  33 #include "openrisc-desc.h"
  34 #include "openrisc-opc.h"
  35 #include "opintl.h"
  36 #include "xregex.h"
  37 #include "libiberty.h"
  38 #include "safe-ctype.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   (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 ((value & 0xffff) ^ 0x8000) - 0x8000;
  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   unsigned long ret;
  78
  79   if (**strp == '#')
  80     ++*strp;
  81
  82   if (strncasecmp (*strp, "hi(", 3) == 0)
  83     {
  84       bfd_vma value;
  85
  86       *strp += 3;
  87 #if 0
  88       errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
  89       if (errmsg != NULL)
  90         fprintf (stderr, "parse_hi: %s\n", errmsg);
  91       if (errmsg != NULL)
  92 #endif
  93         errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16,
  94                                      &result_type, &value);
  95       if (**strp != ')')
  96         return _("missing `)'");
  97
  98       ++*strp;
  99       if (errmsg == NULL
 100           && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
 101         value >>= 16;
 102       ret = value;
 103     }
 104   else
 105     {
 106       if (**strp == '-')
 107         {
 108           long value;
 109           errmsg = cgen_parse_signed_integer (cd, strp, opindex, &value);
 110           ret = value;
 111         }
 112       else
 113         {
 114           unsigned long value;
 115           errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, &value);
 116           ret = value;
 117         }
 118     }
 119
 120   *valuep = ((ret & 0xffff) ^ 0x8000) - 0x8000;
 121   return errmsg;
 122 }
 123
 124 /* Handle lo().  */
 125
 126 static const char *
 127 parse_lo16 (cd, strp, opindex, valuep)
 128      CGEN_CPU_DESC cd;
 129      const char **strp;
 130      int opindex;
 131      unsigned long *valuep;
 132 {
 133   const char *errmsg;
 134   enum cgen_parse_operand_result result_type;
 135   unsigned long ret;
 136
 137   if (**strp == '#')
 138     ++*strp;
 139
 140   if (strncasecmp (*strp, "lo(", 3) == 0)
 141     {
 142       bfd_vma value;
 143
 144       *strp += 3;
 145 #if 0
 146       errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
 147       if (errmsg != NULL)
 148         fprintf (stderr, "parse_lo: %s\n", errmsg);
 149
 150       if (errmsg != NULL)
 151 #endif
 152         errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
 153                                      &result_type, &value);
 154       if (**strp != ')')
 155         return _("missing `)'");
 156
 157       ++*strp;
 158       ret = value;
 159     }
 160   else
 161     {
 162       if (**strp == '-')
 163         {
 164           long value;
 165           errmsg = cgen_parse_signed_integer (cd, strp, opindex, &value);
 166           ret = value;
 167         }
 168       else
 169         {
 170           unsigned long value;
 171           errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, &value);
 172           ret = value;
 173         }
 174     }
 175
 176   *valuep = ((ret & 0xffff) ^ 0x8000) - 0x8000;
 177   return errmsg;
 178 }
 179
 180 /* -- */
 181
 182 const char * openrisc_cgen_parse_operand
 183   PARAMS ((CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *));
 184
 185 /* Main entry point for operand parsing.
 186
 187    This function is basically just a big switch statement.  Earlier versions
 188    used tables to look up the function to use, but
 189    - if the table contains both assembler and disassembler functions then
 190      the disassembler contains much of the assembler and vice-versa,
 191    - there's a lot of inlining possibilities as things grow,
 192    - using a switch statement avoids the function call overhead.
 193
 194    This function could be moved into `parse_insn_normal', but keeping it
 195    separate makes clear the interface between `parse_insn_normal' and each of
 196    the handlers.  */
 197
 198 const char *
 199 openrisc_cgen_parse_operand (cd, opindex, strp, fields)
 200      CGEN_CPU_DESC cd;
 201      int opindex;
 202      const char ** strp;
 203      CGEN_FIELDS * fields;
 204 {
 205   const char * errmsg = NULL;
 206   /* Used by scalar operands that still need to be parsed.  */
 207   long junk ATTRIBUTE_UNUSED;
 208
 209   switch (opindex)
 210     {
 211     case OPENRISC_OPERAND_ABS_26 :
 212       {
 213         bfd_vma value;
 214         errmsg = cgen_parse_address (cd, strp, OPENRISC_OPERAND_ABS_26, 0, NULL,  & value);
 215         fields->f_abs26 = value;
 216       }
 217       break;
 218     case OPENRISC_OPERAND_DISP_26 :
 219       {
 220         bfd_vma value;
 221         errmsg = cgen_parse_address (cd, strp, OPENRISC_OPERAND_DISP_26, 0, NULL,  & value);
 222         fields->f_disp26 = value;
 223       }
 224       break;
 225     case OPENRISC_OPERAND_HI16 :
 226       errmsg = parse_hi16 (cd, strp, OPENRISC_OPERAND_HI16, &fields->f_simm16);
 227       break;
 228     case OPENRISC_OPERAND_LO16 :
 229       errmsg = parse_lo16 (cd, strp, OPENRISC_OPERAND_LO16, &fields->f_lo16);
 230       break;
 231     case OPENRISC_OPERAND_OP_F_23 :
 232       errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_OP_F_23, &fields->f_op4);
 233       break;
 234     case OPENRISC_OPERAND_OP_F_3 :
 235       errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_OP_F_3, &fields->f_op5);
 236       break;
 237     case OPENRISC_OPERAND_RA :
 238       errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r2);
 239       break;
 240     case OPENRISC_OPERAND_RB :
 241       errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r3);
 242       break;
 243     case OPENRISC_OPERAND_RD :
 244       errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r1);
 245       break;
 246     case OPENRISC_OPERAND_SIMM_16 :
 247       errmsg = cgen_parse_signed_integer (cd, strp, OPENRISC_OPERAND_SIMM_16, &fields->f_simm16);
 248       break;
 249     case OPENRISC_OPERAND_UI16NC :
 250       errmsg = parse_lo16 (cd, strp, OPENRISC_OPERAND_UI16NC, &fields->f_i16nc);
 251       break;
 252     case OPENRISC_OPERAND_UIMM_16 :
 253       errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_UIMM_16, &fields->f_uimm16);
 254       break;
 255     case OPENRISC_OPERAND_UIMM_5 :
 256       errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_UIMM_5, &fields->f_uimm5);
 257       break;
 258
 259     default :
 260       /* xgettext:c-format */
 261       fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
 262       abort ();
 263   }
 264
 265   return errmsg;
 266 }
 267
 268 cgen_parse_fn * const openrisc_cgen_parse_handlers[] =
 269 {
 270   parse_insn_normal,
 271 };
 272
 273 void
 274 openrisc_cgen_init_asm (cd)
 275      CGEN_CPU_DESC cd;
 276 {
 277   openrisc_cgen_init_opcode_table (cd);
 278   openrisc_cgen_init_ibld_table (cd);
 279   cd->parse_handlers = & openrisc_cgen_parse_handlers[0];
 280   cd->parse_operand = openrisc_cgen_parse_operand;
 281 }
 282
 283 \f
 284
 285 /* Regex construction routine.
 286
 287    This translates an opcode syntax string into a regex string,
 288    by replacing any non-character syntax element (such as an
 289    opcode) with the pattern '.*'
 290
 291    It then compiles the regex and stores it in the opcode, for
 292    later use by openrisc_cgen_assemble_insn
 293
 294    Returns NULL for success, an error message for failure.  */
 295
 296 char *
 297 openrisc_cgen_build_insn_regex (CGEN_INSN *insn)
 298 {
 299   CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
 300   const char *mnem = CGEN_INSN_MNEMONIC (insn);
 301   char rxbuf[CGEN_MAX_RX_ELEMENTS];
 302   char *rx = rxbuf;
 303   const CGEN_SYNTAX_CHAR_TYPE *syn;
 304   int reg_err;
 305
 306   syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
 307
 308   /* Mnemonics come first in the syntax string.  */
 309   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
 310     return _("missing mnemonic in syntax string");
 311   ++syn;
 312
 313   /* Generate a case sensitive regular expression that emulates case
 314      insensitive matching in the "C" locale.  We cannot generate a case
 315      insensitive regular expression because in Turkish locales, 'i' and 'I'
 316      are not equal modulo case conversion.  */
 317
 318   /* Copy the literal mnemonic out of the insn.  */
 319   for (; *mnem; mnem++)
 320     {
 321       char c = *mnem;
 322
 323       if (ISALPHA (c))
 324         {
 325           *rx++ = '[';
 326           *rx++ = TOLOWER (c);
 327           *rx++ = TOUPPER (c);
 328           *rx++ = ']';
 329         }
 330       else
 331         *rx++ = c;
 332     }
 333
 334   /* Copy any remaining literals from the syntax string into the rx.  */
 335   for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
 336     {
 337       if (CGEN_SYNTAX_CHAR_P (* syn))
 338         {
 339           char c = CGEN_SYNTAX_CHAR (* syn);
 340
 341           switch (c)
 342             {
 343               /* Escape any regex metacharacters in the syntax.  */
 344             case '.': case '[': case '\\':
 345             case '*': case '^': case '$':
 346
 347 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
 348             case '?': case '{': case '}':
 349             case '(': case ')': case '*':
 350             case '|': case '+': case ']':
 351 #endif
 352               *rx++ = '\\';
 353               *rx++ = c;
 354               break;
 355
 356             default:
 357               if (ISALPHA (c))
 358                 {
 359                   *rx++ = '[';
 360                   *rx++ = TOLOWER (c);
 361                   *rx++ = TOUPPER (c);
 362                   *rx++ = ']';
 363                 }
 364               else
 365                 *rx++ = c;
 366               break;
 367             }
 368         }
 369       else
 370         {
 371           /* Replace non-syntax fields with globs.  */
 372           *rx++ = '.';
 373           *rx++ = '*';
 374         }
 375     }
 376
 377   /* Trailing whitespace ok.  */
 378   * rx++ = '[';
 379   * rx++ = ' ';
 380   * rx++ = '\t';
 381   * rx++ = ']';
 382   * rx++ = '*';
 383
 384   /* But anchor it after that.  */
 385   * rx++ = '$';
 386   * rx = '\0';
 387
 388   CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
 389   reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
 390
 391   if (reg_err == 0)
 392     return NULL;
 393   else
 394     {
 395       static char msg[80];
 396
 397       regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
 398       regfree ((regex_t *) CGEN_INSN_RX (insn));
 399       free (CGEN_INSN_RX (insn));
 400       (CGEN_INSN_RX (insn)) = NULL;
 401       return msg;
 402     }
 403 }
 404
 405 \f
 406 /* Default insn parser.
 407
 408    The syntax string is scanned and operands are parsed and stored in FIELDS.
 409    Relocs are queued as we go via other callbacks.
 410
 411    ??? Note that this is currently an all-or-nothing parser.  If we fail to
 412    parse the instruction, we return 0 and the caller will start over from
 413    the beginning.  Backtracking will be necessary in parsing subexpressions,
 414    but that can be handled there.  Not handling backtracking here may get
 415    expensive in the case of the m68k.  Deal with later.
 416
 417    Returns NULL for success, an error message for failure.  */
 418
 419 static const char *
 420 parse_insn_normal (CGEN_CPU_DESC cd,
 421                    const CGEN_INSN *insn,
 422                    const char **strp,
 423                    CGEN_FIELDS *fields)
 424 {
 425   /* ??? Runtime added insns not handled yet.  */
 426   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 427   const char *str = *strp;
 428   const char *errmsg;
 429   const char *p;
 430   const CGEN_SYNTAX_CHAR_TYPE * syn;
 431 #ifdef CGEN_MNEMONIC_OPERANDS
 432   /* FIXME: wip */
 433   int past_opcode_p;
 434 #endif
 435
 436   /* For now we assume the mnemonic is first (there are no leading operands).
 437      We can parse it without needing to set up operand parsing.
 438      GAS's input scrubber will ensure mnemonics are lowercase, but we may
 439      not be called from GAS.  */
 440   p = CGEN_INSN_MNEMONIC (insn);
 441   while (*p && TOLOWER (*p) == TOLOWER (*str))
 442     ++p, ++str;
 443
 444   if (* p)
 445     return _("unrecognized instruction");
 446
 447 #ifndef CGEN_MNEMONIC_OPERANDS
 448   if (* str && ! ISSPACE (* str))
 449     return _("unrecognized instruction");
 450 #endif
 451
 452   CGEN_INIT_PARSE (cd);
 453   cgen_init_parse_operand (cd);
 454 #ifdef CGEN_MNEMONIC_OPERANDS
 455   past_opcode_p = 0;
 456 #endif
 457
 458   /* We don't check for (*str != '\0') here because we want to parse
 459      any trailing fake arguments in the syntax string.  */
 460   syn = CGEN_SYNTAX_STRING (syntax);
 461
 462   /* Mnemonics come first for now, ensure valid string.  */
 463   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
 464     abort ();
 465
 466   ++syn;
 467
 468   while (* syn != 0)
 469     {
 470       /* Non operand chars must match exactly.  */
 471       if (CGEN_SYNTAX_CHAR_P (* syn))
 472         {
 473           /* FIXME: While we allow for non-GAS callers above, we assume the
 474              first char after the mnemonic part is a space.  */
 475           /* FIXME: We also take inappropriate advantage of the fact that
 476              GAS's input scrubber will remove extraneous blanks.  */
 477           if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
 478             {
 479 #ifdef CGEN_MNEMONIC_OPERANDS
 480               if (CGEN_SYNTAX_CHAR(* syn) == ' ')
 481                 past_opcode_p = 1;
 482 #endif
 483               ++ syn;
 484               ++ str;
 485             }
 486           else if (*str)
 487             {
 488               /* Syntax char didn't match.  Can't be this insn.  */
 489               static char msg [80];
 490
 491               /* xgettext:c-format */
 492               sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
 493                        CGEN_SYNTAX_CHAR(*syn), *str);
 494               return msg;
 495             }
 496           else
 497             {
 498               /* Ran out of input.  */
 499               static char msg [80];
 500
 501               /* xgettext:c-format */
 502               sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
 503                        CGEN_SYNTAX_CHAR(*syn));
 504               return msg;
 505             }
 506           continue;
 507         }
 508
 509       /* We have an operand of some sort.  */
 510       errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
 511                                           &str, fields);
 512       if (errmsg)
 513         return errmsg;
 514
 515       /* Done with this operand, continue with next one.  */
 516       ++ syn;
 517     }
 518
 519   /* If we're at the end of the syntax string, we're done.  */
 520   if (* syn == 0)
 521     {
 522       /* FIXME: For the moment we assume a valid `str' can only contain
 523          blanks now.  IE: We needn't try again with a longer version of
 524          the insn and it is assumed that longer versions of insns appear
 525          before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
 526       while (ISSPACE (* str))
 527         ++ str;
 528
 529       if (* str != '\0')
 530         return _("junk at end of line"); /* FIXME: would like to include `str' */
 531
 532       return NULL;
 533     }
 534
 535   /* We couldn't parse it.  */
 536   return _("unrecognized instruction");
 537 }
 538 \f
 539 /* Main entry point.
 540    This routine is called for each instruction to be assembled.
 541    STR points to the insn to be assembled.
 542    We assume all necessary tables have been initialized.
 543    The assembled instruction, less any fixups, is stored in BUF.
 544    Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
 545    still needs to be converted to target byte order, otherwise BUF is an array
 546    of bytes in target byte order.
 547    The result is a pointer to the insn's entry in the opcode table,
 548    or NULL if an error occured (an error message will have already been
 549    printed).
 550
 551    Note that when processing (non-alias) macro-insns,
 552    this function recurses.
 553
 554    ??? It's possible to make this cpu-independent.
 555    One would have to deal with a few minor things.
 556    At this point in time doing so would be more of a curiosity than useful
 557    [for example this file isn't _that_ big], but keeping the possibility in
 558    mind helps keep the design clean.  */
 559
 560 const CGEN_INSN *
 561 openrisc_cgen_assemble_insn (CGEN_CPU_DESC cd,
 562                            const char *str,
 563                            CGEN_FIELDS *fields,
 564                            CGEN_INSN_BYTES_PTR buf,
 565                            char **errmsg)
 566 {
 567   const char *start;
 568   CGEN_INSN_LIST *ilist;
 569   const char *parse_errmsg = NULL;
 570   const char *insert_errmsg = NULL;
 571   int recognized_mnemonic = 0;
 572
 573   /* Skip leading white space.  */
 574   while (ISSPACE (* str))
 575     ++ str;
 576
 577   /* The instructions are stored in hashed lists.
 578      Get the first in the list.  */
 579   ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
 580
 581   /* Keep looking until we find a match.  */
 582   start = str;
 583   for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
 584     {
 585       const CGEN_INSN *insn = ilist->insn;
 586       recognized_mnemonic = 1;
 587
 588 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
 589       /* Not usually needed as unsupported opcodes
 590          shouldn't be in the hash lists.  */
 591       /* Is this insn supported by the selected cpu?  */
 592       if (! openrisc_cgen_insn_supported (cd, insn))
 593         continue;
 594 #endif
 595       /* If the RELAXED attribute is set, this is an insn that shouldn't be
 596          chosen immediately.  Instead, it is used during assembler/linker
 597          relaxation if possible.  */
 598       if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
 599         continue;
 600
 601       str = start;
 602
 603       /* Skip this insn if str doesn't look right lexically.  */
 604       if (CGEN_INSN_RX (insn) != NULL &&
 605           regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
 606         continue;
 607
 608       /* Allow parse/insert handlers to obtain length of insn.  */
 609       CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
 610
 611       parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
 612       if (parse_errmsg != NULL)
 613         continue;
 614
 615       /* ??? 0 is passed for `pc'.  */
 616       insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
 617                                                  (bfd_vma) 0);
 618       if (insert_errmsg != NULL)
 619         continue;
 620
 621       /* It is up to the caller to actually output the insn and any
 622          queued relocs.  */
 623       return insn;
 624     }
 625
 626   {
 627     static char errbuf[150];
 628 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
 629     const char *tmp_errmsg;
 630
 631     /* If requesting verbose error messages, use insert_errmsg.
 632        Failing that, use parse_errmsg.  */
 633     tmp_errmsg = (insert_errmsg ? insert_errmsg :
 634                   parse_errmsg ? parse_errmsg :
 635                   recognized_mnemonic ?
 636                   _("unrecognized form of instruction") :
 637                   _("unrecognized instruction"));
 638
 639     if (strlen (start) > 50)
 640       /* xgettext:c-format */
 641       sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
 642     else
 643       /* xgettext:c-format */
 644       sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
 645 #else
 646     if (strlen (start) > 50)
 647       /* xgettext:c-format */
 648       sprintf (errbuf, _("bad instruction `%.50s...'"), start);
 649     else
 650       /* xgettext:c-format */
 651       sprintf (errbuf, _("bad instruction `%.50s'"), start);
 652 #endif
 653
 654     *errmsg = errbuf;
 655     return NULL;
 656   }
 657 }
 658 \f
 659 #if 0 /* This calls back to GAS which we can't do without care.  */
 660
 661 /* Record each member of OPVALS in the assembler's symbol table.
 662    This lets GAS parse registers for us.
 663    ??? Interesting idea but not currently used.  */
 664
 665 /* Record each member of OPVALS in the assembler's symbol table.
 666    FIXME: Not currently used.  */
 667
 668 void
 669 openrisc_cgen_asm_hash_keywords (CGEN_CPU_DESC cd, CGEN_KEYWORD *opvals)
 670 {
 671   CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
 672   const CGEN_KEYWORD_ENTRY * ke;
 673
 674   while ((ke = cgen_keyword_search_next (& search)) != NULL)
 675     {
 676 #if 0 /* Unnecessary, should be done in the search routine.  */
 677       if (! openrisc_cgen_opval_supported (ke))
 678         continue;
 679 #endif
 680       cgen_asm_record_register (cd, ke->name, ke->value);
 681     }
 682 }
 683
 684 #endif /* 0 */