opcodes/mep-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, 2005, 2007, 2008
   8    Free Software Foundation, Inc.
   9
  10    This file is part of libopcodes.
  11
  12    This library is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3, or (at your option)
  15    any later version.
  16
  17    It is distributed in the hope that it will be useful, but WITHOUT
  18    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  19    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  20    License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software Foundation, Inc.,
  24    51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  25
  26
  27 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
  28    Keep that in mind.  */
  29
  30 #include "sysdep.h"
  31 #include <stdio.h>
  32 #include "ansidecl.h"
  33 #include "bfd.h"
  34 #include "symcat.h"
  35 #include "mep-desc.h"
  36 #include "mep-opc.h"
  37 #include "opintl.h"
  38 #include "xregex.h"
  39 #include "libiberty.h"
  40 #include "safe-ctype.h"
  41
  42 #undef  min
  43 #define min(a,b) ((a) < (b) ? (a) : (b))
  44 #undef  max
  45 #define max(a,b) ((a) > (b) ? (a) : (b))
  46
  47 static const char * parse_insn_normal
  48   (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
  49 \f
  50 /* -- assembler routines inserted here.  */
  51
  52 /* -- asm.c */
  53
  54 #include "elf/mep.h"
  55
  56 #define CGEN_VALIDATE_INSN_SUPPORTED
  57 #define mep_cgen_insn_supported mep_cgen_insn_supported_asm
  58
  59        const char * parse_csrn       (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *);
  60        const char * parse_tpreg      (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *);
  61        const char * parse_spreg      (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *);
  62        const char * parse_mep_align  (CGEN_CPU_DESC, const char **, enum cgen_operand_type, long *);
  63        const char * parse_mep_alignu (CGEN_CPU_DESC, const char **, enum cgen_operand_type, unsigned long *);
  64 static const char * parse_signed16   (CGEN_CPU_DESC, const char **, int, long *);
  65 static const char * parse_signed16_range   (CGEN_CPU_DESC, const char **, int, long *) ATTRIBUTE_UNUSED;
  66 static const char * parse_unsigned16 (CGEN_CPU_DESC, const char **, int, unsigned long *);
  67 static const char * parse_unsigned16_range (CGEN_CPU_DESC, const char **, int, unsigned long *) ATTRIBUTE_UNUSED;
  68 static const char * parse_lo16       (CGEN_CPU_DESC, const char **, int, long *, long);
  69 static const char * parse_unsigned7  (CGEN_CPU_DESC, const char **, enum cgen_operand_type, unsigned long *);
  70 static const char * parse_zero       (CGEN_CPU_DESC, const char **, int, long *);
  71
  72 const char *
  73 parse_csrn (CGEN_CPU_DESC cd, const char **strp,
  74             CGEN_KEYWORD *keyword_table, long *field)
  75 {
  76   const char *err;
  77   unsigned long value;
  78
  79   err = cgen_parse_keyword (cd, strp, keyword_table, field);
  80   if (!err)
  81     return NULL;
  82
  83   err = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CSRN_IDX, & value);
  84   if (err)
  85     return err;
  86   *field = value;
  87   return NULL;
  88 }
  89
  90 /* begin-cop-ip-parse-handlers */
  91 static const char *
  92 parse_ivc2_cr (CGEN_CPU_DESC,
  93         const char **,
  94         CGEN_KEYWORD *,
  95         long *) ATTRIBUTE_UNUSED;
  96 static const char *
  97 parse_ivc2_cr (CGEN_CPU_DESC cd,
  98         const char **strp,
  99         CGEN_KEYWORD *keyword_table  ATTRIBUTE_UNUSED,
 100         long *field)
 101 {
 102   return cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr_ivc2, field);
 103 }
 104 static const char *
 105 parse_ivc2_ccr (CGEN_CPU_DESC,
 106         const char **,
 107         CGEN_KEYWORD *,
 108         long *) ATTRIBUTE_UNUSED;
 109 static const char *
 110 parse_ivc2_ccr (CGEN_CPU_DESC cd,
 111         const char **strp,
 112         CGEN_KEYWORD *keyword_table  ATTRIBUTE_UNUSED,
 113         long *field)
 114 {
 115   return cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, field);
 116 }
 117 /* end-cop-ip-parse-handlers */
 118
 119 const char *
 120 parse_tpreg (CGEN_CPU_DESC cd, const char ** strp,
 121              CGEN_KEYWORD *keyword_table, long *field)
 122 {
 123   const char *err;
 124
 125   err = cgen_parse_keyword (cd, strp, keyword_table, field);
 126   if (err)
 127     return err;
 128   if (*field != 13)
 129     return _("Only $tp or $13 allowed for this opcode");
 130   return NULL;
 131 }
 132
 133 const char *
 134 parse_spreg (CGEN_CPU_DESC cd, const char ** strp,
 135              CGEN_KEYWORD *keyword_table, long *field)
 136 {
 137   const char *err;
 138
 139   err = cgen_parse_keyword (cd, strp, keyword_table, field);
 140   if (err)
 141     return err;
 142   if (*field != 15)
 143     return _("Only $sp or $15 allowed for this opcode");
 144   return NULL;
 145 }
 146
 147 const char *
 148 parse_mep_align (CGEN_CPU_DESC cd, const char ** strp,
 149                  enum cgen_operand_type type, long *field)
 150 {
 151   long lsbs = 0;
 152   const char *err;
 153
 154   switch (type)
 155     {
 156     case MEP_OPERAND_PCREL8A2:
 157     case MEP_OPERAND_PCREL12A2:
 158     case MEP_OPERAND_PCREL17A2:
 159     case MEP_OPERAND_PCREL24A2:
 160       err = cgen_parse_signed_integer   (cd, strp, type, field);
 161       break;
 162     case MEP_OPERAND_PCABS24A2:
 163     case MEP_OPERAND_UDISP7:
 164     case MEP_OPERAND_UDISP7A2:
 165     case MEP_OPERAND_UDISP7A4:
 166     case MEP_OPERAND_UIMM7A4:
 167     case MEP_OPERAND_ADDR24A4:
 168       err = cgen_parse_unsigned_integer (cd, strp, type, (unsigned long *) field);
 169       break;
 170     default:
 171       abort();
 172     }
 173   if (err)
 174     return err;
 175   switch (type)
 176     {
 177     case MEP_OPERAND_UDISP7:
 178       lsbs = 0;
 179       break;
 180     case MEP_OPERAND_PCREL8A2:
 181     case MEP_OPERAND_PCREL12A2:
 182     case MEP_OPERAND_PCREL17A2:
 183     case MEP_OPERAND_PCREL24A2:
 184     case MEP_OPERAND_PCABS24A2:
 185     case MEP_OPERAND_UDISP7A2:
 186       lsbs = *field & 1;
 187       break;
 188     case MEP_OPERAND_UDISP7A4:
 189     case MEP_OPERAND_UIMM7A4:
 190     case MEP_OPERAND_ADDR24A4:
 191       lsbs = *field & 3;
 192       break;
 193       lsbs = *field & 7;
 194       break;
 195     default:
 196       /* Safe assumption?  */
 197       abort ();
 198     }
 199   if (lsbs)
 200     return "Value is not aligned enough";
 201   return NULL;
 202 }
 203
 204 const char *
 205 parse_mep_alignu (CGEN_CPU_DESC cd, const char ** strp,
 206                  enum cgen_operand_type type, unsigned long *field)
 207 {
 208   return parse_mep_align (cd, strp, type, (long *) field);
 209 }
 210
 211
 212 /* Handle %lo(), %tpoff(), %sdaoff(), %hi(), and other signed
 213    constants in a signed context.  */
 214
 215 static const char *
 216 parse_signed16 (CGEN_CPU_DESC cd,
 217                 const char **strp,
 218                 int opindex,
 219                 long *valuep)
 220 {
 221   return parse_lo16 (cd, strp, opindex, valuep, 1);
 222 }
 223
 224 static const char *
 225 parse_lo16 (CGEN_CPU_DESC cd,
 226             const char **strp,
 227             int opindex,
 228             long *valuep,
 229             long signedp)
 230 {
 231   const char *errmsg;
 232   enum cgen_parse_operand_result result_type;
 233   bfd_vma value;
 234
 235   if (strncasecmp (*strp, "%lo(", 4) == 0)
 236     {
 237       *strp += 4;
 238       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_LOW16,
 239                                    & result_type, & value);
 240       if (**strp != ')')
 241         return _("missing `)'");
 242       ++*strp;
 243       if (errmsg == NULL
 244           && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
 245         value &= 0xffff;
 246       if (signedp)
 247         *valuep = (long)(short) value;
 248       else
 249         *valuep = value;
 250       return errmsg;
 251     }
 252
 253   if (strncasecmp (*strp, "%hi(", 4) == 0)
 254     {
 255       *strp += 4;
 256       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16S,
 257                                    & result_type, & value);
 258       if (**strp != ')')
 259         return _("missing `)'");
 260       ++*strp;
 261       if (errmsg == NULL
 262           && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
 263         value = (value + 0x8000) >> 16;
 264       *valuep = value;
 265       return errmsg;
 266     }
 267
 268   if (strncasecmp (*strp, "%uhi(", 5) == 0)
 269     {
 270       *strp += 5;
 271       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16U,
 272                                    & result_type, & value);
 273       if (**strp != ')')
 274         return _("missing `)'");
 275       ++*strp;
 276       if (errmsg == NULL
 277           && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
 278         value = value >> 16;
 279       *valuep = value;
 280       return errmsg;
 281     }
 282
 283   if (strncasecmp (*strp, "%sdaoff(", 8) == 0)
 284     {
 285       *strp += 8;
 286       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_GPREL,
 287                                    NULL, & value);
 288       if (**strp != ')')
 289         return _("missing `)'");
 290       ++*strp;
 291       *valuep = value;
 292       return errmsg;
 293     }
 294
 295   if (strncasecmp (*strp, "%tpoff(", 7) == 0)
 296     {
 297       *strp += 7;
 298       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_TPREL,
 299                                    NULL, & value);
 300       if (**strp != ')')
 301         return _("missing `)'");
 302       ++*strp;
 303       *valuep = value;
 304       return errmsg;
 305     }
 306
 307   if (**strp == '%')
 308     return _("invalid %function() here");
 309
 310   return cgen_parse_signed_integer (cd, strp, opindex, valuep);
 311 }
 312
 313 static const char *
 314 parse_unsigned16 (CGEN_CPU_DESC cd,
 315                   const char **strp,
 316                   int opindex,
 317                   unsigned long *valuep)
 318 {
 319   return parse_lo16 (cd, strp, opindex, (long *) valuep, 0);
 320 }
 321
 322 static const char *
 323 parse_signed16_range (CGEN_CPU_DESC cd,
 324                       const char **strp,
 325                       int opindex,
 326                       signed long *valuep)
 327 {
 328   const char *errmsg = 0;
 329   signed long value;
 330
 331   errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
 332   if (errmsg)
 333     return errmsg;
 334
 335   if (value < -32768 || value > 32767)
 336     return _("Immediate is out of range -32768 to 32767");
 337
 338   *valuep = value;
 339   return 0;
 340 }
 341
 342 static const char *
 343 parse_unsigned16_range (CGEN_CPU_DESC cd,
 344                         const char **strp,
 345                         int opindex,
 346                         unsigned long *valuep)
 347 {
 348   const char *errmsg = 0;
 349   unsigned long value;
 350
 351   errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, & value);
 352   if (errmsg)
 353     return errmsg;
 354
 355   if (value > 65535)
 356     return _("Immediate is out of range 0 to 65535");
 357
 358   *valuep = value;
 359   return 0;
 360 }
 361
 362 /* A special case of parse_signed16 which accepts only the value zero.  */
 363
 364 static const char *
 365 parse_zero (CGEN_CPU_DESC cd, const char **strp, int opindex, long *valuep)
 366 {
 367   const char *errmsg;
 368   enum cgen_parse_operand_result result_type;
 369   bfd_vma value;
 370
 371   /*fprintf(stderr, "dj: signed parse opindex `%s'\n", *strp);*/
 372
 373   /* Prevent ($ry) from being attempted as an expression on 'sw $rx,($ry)'.
 374      It will fail and cause ry to be listed as an undefined symbol in the
 375      listing.  */
 376   if (strncmp (*strp, "($", 2) == 0)
 377     return "not zero"; /* any string will do -- will never be seen.  */
 378
 379   if (strncasecmp (*strp, "%lo(", 4) == 0)
 380     {
 381       *strp += 4;
 382       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_LOW16,
 383                                    &result_type, &value);
 384       if (**strp != ')')
 385         return "missing `)'";
 386       ++*strp;
 387       if (errmsg == NULL
 388           && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0))
 389         return "not zero"; /* any string will do -- will never be seen.  */
 390       *valuep = value;
 391       return errmsg;
 392     }
 393
 394   if (strncasecmp (*strp, "%hi(", 4) == 0)
 395     {
 396       *strp += 4;
 397       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16S,
 398                                    &result_type, &value);
 399       if (**strp != ')')
 400         return "missing `)'";
 401       ++*strp;
 402       if (errmsg == NULL
 403           && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0))
 404         return "not zero"; /* any string will do -- will never be seen.  */
 405       *valuep = value;
 406       return errmsg;
 407     }
 408
 409   if (strncasecmp (*strp, "%uhi(", 5) == 0)
 410     {
 411       *strp += 5;
 412       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16U,
 413                                    &result_type, &value);
 414       if (**strp != ')')
 415         return "missing `)'";
 416       ++*strp;
 417       if (errmsg == NULL
 418           && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0))
 419         return "not zero"; /* any string will do -- will never be seen.  */
 420       *valuep = value;
 421       return errmsg;
 422     }
 423
 424   if (strncasecmp (*strp, "%sdaoff(", 8) == 0)
 425     {
 426       *strp += 8;
 427       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_GPREL,
 428                                    &result_type, &value);
 429       if (**strp != ')')
 430         return "missing `)'";
 431       ++*strp;
 432       if (errmsg == NULL
 433           && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0))
 434         return "not zero"; /* any string will do -- will never be seen.  */
 435       *valuep = value;
 436       return errmsg;
 437     }
 438
 439   if (strncasecmp (*strp, "%tpoff(", 7) == 0)
 440     {
 441       *strp += 7;
 442       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_TPREL,
 443                                    &result_type, &value);
 444       if (**strp != ')')
 445         return "missing `)'";
 446       ++*strp;
 447       if (errmsg == NULL
 448           && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0))
 449         return "not zero"; /* any string will do -- will never be seen.  */
 450       *valuep = value;
 451       return errmsg;
 452     }
 453
 454   if (**strp == '%')
 455     return "invalid %function() here";
 456
 457   errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_NONE,
 458                                &result_type, &value);
 459   if (errmsg == NULL
 460       && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0))
 461     return "not zero"; /* any string will do -- will never be seen.  */
 462
 463   return errmsg;
 464 }
 465
 466 static const char *
 467 parse_unsigned7 (CGEN_CPU_DESC cd, const char **strp,
 468                  enum cgen_operand_type opindex, unsigned long *valuep)
 469 {
 470   const char *errmsg;
 471   bfd_vma value;
 472
 473   /* fprintf(stderr, "dj: unsigned7 parse `%s'\n", *strp); */
 474
 475   if (strncasecmp (*strp, "%tpoff(", 7) == 0)
 476     {
 477       int reloc;
 478       *strp += 7;
 479       switch (opindex)
 480         {
 481         case MEP_OPERAND_UDISP7:
 482           reloc = BFD_RELOC_MEP_TPREL7;
 483           break;
 484         case MEP_OPERAND_UDISP7A2:
 485           reloc = BFD_RELOC_MEP_TPREL7A2;
 486           break;
 487         case MEP_OPERAND_UDISP7A4:
 488           reloc = BFD_RELOC_MEP_TPREL7A4;
 489           break;
 490         default:
 491           /* Safe assumption?  */
 492           abort ();
 493         }
 494       errmsg = cgen_parse_address (cd, strp, opindex, reloc,
 495                                    NULL, &value);
 496       if (**strp != ')')
 497         return "missing `)'";
 498       ++*strp;
 499       *valuep = value;
 500       return errmsg;
 501     }
 502
 503   if (**strp == '%')
 504     return _("invalid %function() here");
 505
 506   return parse_mep_alignu (cd, strp, opindex, valuep);
 507 }
 508
 509 static ATTRIBUTE_UNUSED const char *
 510 parse_cdisp10 (CGEN_CPU_DESC cd,
 511                const char **strp,
 512                int opindex,
 513                long *valuep)
 514 {
 515   const char *errmsg = 0;
 516   signed long value;
 517   long have_zero = 0;
 518   int wide = 0;
 519   int alignment;
 520
 521   switch (opindex)
 522     {
 523     case MEP_OPERAND_CDISP10A4:
 524       alignment = 2;
 525       break;
 526     case MEP_OPERAND_CDISP10A2:
 527       alignment = 1;
 528       break;
 529     case MEP_OPERAND_CDISP10:
 530     default:
 531       alignment = 0;
 532       break;
 533     }
 534
 535   if ((MEP_CPU & EF_MEP_CPU_MASK) == EF_MEP_CPU_C5)
 536     wide = 1;
 537
 538   if (strncmp (*strp, "0x0", 3) == 0
 539       || (**strp == '0' && *(*strp + 1) != 'x'))
 540     have_zero = 1;
 541
 542   errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
 543   if (errmsg)
 544     return errmsg;
 545
 546   if (wide)
 547     {
 548       if (value < -512 || value > 511)
 549         return _("Immediate is out of range -512 to 511");
 550     }
 551   else
 552     {
 553       if (value < -128 || value > 127)
 554         return _("Immediate is out of range -128 to 127");
 555     }
 556
 557   if (value & ((1<<alignment)-1))
 558     return _("Value is not aligned enough");
 559
 560   /* If this field may require a relocation then use larger dsp16.  */
 561   if (! have_zero && value == 0)
 562     return (wide ? _("Immediate is out of range -512 to 511")
 563             : _("Immediate is out of range -128 to 127"));
 564
 565   *valuep = value;
 566   return 0;
 567 }
 568
 569 /* BEGIN LIGHTWEIGHT MACRO PROCESSOR.  */
 570
 571 #define MAXARGS 9
 572
 573 typedef struct
 574 {
 575   char *name;
 576   char *expansion;
 577 }  macro;
 578
 579 typedef struct
 580 {
 581   const char *start;
 582   int len;
 583 } arg;
 584
 585 macro macros[] =
 586 {
 587   { "sizeof", "(`1.end + (- `1))"},
 588   { "startof", "(`1 | 0)" },
 589   { "align4", "(`1&(~3))"},
 590 /*{ "hi", "(((`1+0x8000)>>16) & 0xffff)" },  */
 591 /*{ "lo", "(`1 & 0xffff)" },  */
 592 /*{ "sdaoff", "((`1-__sdabase) & 0x7f)"},  */
 593 /*{ "tpoff", "((`1-__tpbase) & 0x7f)"},  */
 594   { 0,0 }
 595 };
 596
 597 static char  * expand_string    (const char *, int);
 598
 599 static const char *
 600 mep_cgen_expand_macros_and_parse_operand
 601   (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
 602
 603 static char *
 604 str_append (char *dest, const char *input, int len)
 605 {
 606   char *new_dest;
 607   int oldlen;
 608
 609   if (len == 0)
 610     return dest;
 611   /* printf("str_append: <<%s>>, <<%s>>, %d\n", dest, input, len); */
 612   oldlen = (dest ? strlen(dest) : 0);
 613   new_dest = realloc (dest, oldlen + len + 1);
 614   memset (new_dest + oldlen, 0, len + 1);
 615   return strncat (new_dest, input, len);
 616 }
 617
 618 static macro *
 619 lookup_macro (const char *name)
 620 {
 621   macro *m;
 622
 623   for (m = macros; m->name; ++m)
 624     if (strncmp (m->name, name, strlen(m->name)) == 0)
 625       return m;
 626
 627   return 0;
 628 }
 629
 630 static char *
 631 expand_macro (arg *args, int narg, macro *mac)
 632 {
 633   char *result = 0, *rescanned_result = 0;
 634   char *e = mac->expansion;
 635   char *mark = e;
 636   int arg = 0;
 637
 638   /*  printf("expanding macro %s with %d args\n", mac->name, narg + 1); */
 639   while (*e)
 640     {
 641       if (*e == '`' &&
 642           (*e+1) &&
 643           ((*(e + 1) - '1') <= MAXARGS) &&
 644           ((*(e + 1) - '1') <= narg))
 645         {
 646           result = str_append (result, mark, e - mark);
 647           arg = (*(e + 1) - '1');
 648           /* printf("replacing `%d with %s\n", arg+1, args[arg].start); */
 649           result = str_append (result, args[arg].start, args[arg].len);
 650           ++e;
 651           mark = e+1;
 652         }
 653       ++e;
 654     }
 655
 656   if (mark != e)
 657     result = str_append (result, mark, e - mark);
 658
 659   if (result)
 660     {
 661       rescanned_result = expand_string (result, 0);
 662       free (result);
 663       return rescanned_result;
 664     }
 665   else
 666     return result;
 667 }
 668
 669 #define IN_TEXT 0
 670 #define IN_ARGS 1
 671
 672 static char *
 673 expand_string (const char *in, int first_only)
 674 {
 675   int num_expansions = 0;
 676   int depth = 0;
 677   int narg = -1;
 678   arg args[MAXARGS];
 679   int state = IN_TEXT;
 680   const char *mark = in;
 681   macro *macro = 0;
 682
 683   char *expansion = 0;
 684   char *result = 0;
 685
 686   while (*in)
 687     {
 688       switch (state)
 689         {
 690         case IN_TEXT:
 691           if (*in == '%' && *(in + 1) && (!first_only || num_expansions == 0))
 692             {
 693               macro = lookup_macro (in + 1);
 694               if (macro)
 695                 {
 696                   /* printf("entering state %d at '%s'...\n", state, in); */
 697                   result = str_append (result, mark, in - mark);
 698                   mark = in;
 699                   in += 1 + strlen (macro->name);
 700                   while (*in == ' ') ++in;
 701                   if (*in != '(')
 702                     {
 703                       state = IN_TEXT;
 704                       macro = 0;
 705                     }
 706                   else
 707                     {
 708                       state = IN_ARGS;
 709                       narg = 0;
 710                       args[narg].start = in + 1;
 711                       args[narg].len = 0;
 712                       mark = in + 1;
 713                     }
 714                 }
 715             }
 716           break;
 717         case IN_ARGS:
 718           if (depth == 0)
 719             {
 720               switch (*in)
 721                 {
 722                 case ',':
 723                   narg++;
 724                   args[narg].start = (in + 1);
 725                   args[narg].len = 0;
 726                   break;
 727                 case ')':
 728                   state = IN_TEXT;
 729                   /* printf("entering state %d at '%s'...\n", state, in); */
 730                   if (macro)
 731                     {
 732                       expansion = 0;
 733                       expansion = expand_macro (args, narg, macro);
 734                       num_expansions++;
 735                       if (expansion)
 736                         {
 737                           result = str_append (result, expansion, strlen (expansion));
 738                           free (expansion);
 739                         }
 740                     }
 741                   else
 742                     {
 743                       result = str_append (result, mark, in - mark);
 744                     }
 745                   macro = 0;
 746                   mark = in + 1;
 747                   break;
 748                 case '(':
 749                   depth++;
 750                 default:
 751                   args[narg].len++;
 752                   break;
 753                 }
 754             }
 755           else
 756             {
 757               if (*in == ')')
 758                 depth--;
 759               if (narg > -1)
 760                 args[narg].len++;
 761             }
 762
 763         }
 764       ++in;
 765     }
 766
 767   if (mark != in)
 768     result = str_append (result, mark, in - mark);
 769
 770   return result;
 771 }
 772
 773 #undef IN_ARGS
 774 #undef IN_TEXT
 775 #undef MAXARGS
 776
 777
 778 /* END LIGHTWEIGHT MACRO PROCESSOR.  */
 779
 780 const char * mep_cgen_parse_operand
 781   (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
 782
 783 const char *
 784 mep_cgen_expand_macros_and_parse_operand (CGEN_CPU_DESC cd, int opindex,
 785                                           const char ** strp_in, CGEN_FIELDS * fields)
 786 {
 787   const char * errmsg = NULL;
 788   char *str = 0, *hold = 0;
 789   const char **strp = 0;
 790
 791   /* Set up a new pointer to macro-expanded string.  */
 792   str = expand_string (*strp_in, 1);
 793   /* fprintf (stderr, " expanded <<%s>> to <<%s>>\n", *strp_in, str); */
 794
 795   hold = str;
 796   strp = (const char **)(&str);
 797
 798   errmsg = mep_cgen_parse_operand (cd, opindex, strp, fields);
 799
 800   /* Now work out the advance.  */
 801   if (strlen (str) == 0)
 802     *strp_in += strlen (*strp_in);
 803
 804   else
 805     {
 806       if (strstr (*strp_in, str))
 807         /* A macro-expansion was pulled off the front.  */
 808         *strp_in = strstr (*strp_in, str);
 809       else
 810         /* A non-macro-expansion was pulled off the front.  */
 811         *strp_in += (str - hold);
 812     }
 813
 814   if (hold)
 815     free (hold);
 816
 817   return errmsg;
 818 }
 819
 820 #define CGEN_ASM_INIT_HOOK (cd->parse_operand = mep_cgen_expand_macros_and_parse_operand);
 821
 822 /* -- dis.c */
 823
 824 const char * mep_cgen_parse_operand
 825   (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
 826
 827 /* Main entry point for operand parsing.
 828
 829    This function is basically just a big switch statement.  Earlier versions
 830    used tables to look up the function to use, but
 831    - if the table contains both assembler and disassembler functions then
 832      the disassembler contains much of the assembler and vice-versa,
 833    - there's a lot of inlining possibilities as things grow,
 834    - using a switch statement avoids the function call overhead.
 835
 836    This function could be moved into `parse_insn_normal', but keeping it
 837    separate makes clear the interface between `parse_insn_normal' and each of
 838    the handlers.  */
 839
 840 const char *
 841 mep_cgen_parse_operand (CGEN_CPU_DESC cd,
 842                            int opindex,
 843                            const char ** strp,
 844                            CGEN_FIELDS * fields)
 845 {
 846   const char * errmsg = NULL;
 847   /* Used by scalar operands that still need to be parsed.  */
 848   long junk ATTRIBUTE_UNUSED;
 849
 850   switch (opindex)
 851     {
 852     case MEP_OPERAND_ADDR24A4 :
 853       errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_ADDR24A4, (unsigned long *) (& fields->f_24u8a4n));
 854       break;
 855     case MEP_OPERAND_C5RMUIMM20 :
 856       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_C5RMUIMM20, (unsigned long *) (& fields->f_c5_rmuimm20));
 857       break;
 858     case MEP_OPERAND_C5RNMUIMM24 :
 859       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_C5RNMUIMM24, (unsigned long *) (& fields->f_c5_rnmuimm24));
 860       break;
 861     case MEP_OPERAND_CALLNUM :
 862       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CALLNUM, (unsigned long *) (& fields->f_callnum));
 863       break;
 864     case MEP_OPERAND_CCCC :
 865       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CCCC, (unsigned long *) (& fields->f_rm));
 866       break;
 867     case MEP_OPERAND_CCRN :
 868       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr, & fields->f_ccrn);
 869       break;
 870     case MEP_OPERAND_CDISP10 :
 871       errmsg = parse_cdisp10 (cd, strp, MEP_OPERAND_CDISP10, (long *) (& fields->f_cdisp10));
 872       break;
 873     case MEP_OPERAND_CDISP10A2 :
 874       errmsg = parse_cdisp10 (cd, strp, MEP_OPERAND_CDISP10A2, (long *) (& fields->f_cdisp10));
 875       break;
 876     case MEP_OPERAND_CDISP10A4 :
 877       errmsg = parse_cdisp10 (cd, strp, MEP_OPERAND_CDISP10A4, (long *) (& fields->f_cdisp10));
 878       break;
 879     case MEP_OPERAND_CDISP10A8 :
 880       errmsg = parse_cdisp10 (cd, strp, MEP_OPERAND_CDISP10A8, (long *) (& fields->f_cdisp10));
 881       break;
 882     case MEP_OPERAND_CDISP12 :
 883       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_CDISP12, (long *) (& fields->f_12s20));
 884       break;
 885     case MEP_OPERAND_CIMM4 :
 886       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CIMM4, (unsigned long *) (& fields->f_rn));
 887       break;
 888     case MEP_OPERAND_CIMM5 :
 889       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CIMM5, (unsigned long *) (& fields->f_5u24));
 890       break;
 891     case MEP_OPERAND_CODE16 :
 892       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CODE16, (unsigned long *) (& fields->f_16u16));
 893       break;
 894     case MEP_OPERAND_CODE24 :
 895       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CODE24, (unsigned long *) (& fields->f_24u4n));
 896       break;
 897     case MEP_OPERAND_CP_FLAG :
 898       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr, & junk);
 899       break;
 900     case MEP_OPERAND_CRN :
 901       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr, & fields->f_crn);
 902       break;
 903     case MEP_OPERAND_CRN64 :
 904       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_crn);
 905       break;
 906     case MEP_OPERAND_CRNX :
 907       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr, & fields->f_crnx);
 908       break;
 909     case MEP_OPERAND_CRNX64 :
 910       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_crnx);
 911       break;
 912     case MEP_OPERAND_CROC :
 913       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_5u7);
 914       break;
 915     case MEP_OPERAND_CROP :
 916       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_5u23);
 917       break;
 918     case MEP_OPERAND_CRPC :
 919       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_5u26);
 920       break;
 921     case MEP_OPERAND_CRPP :
 922       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_5u18);
 923       break;
 924     case MEP_OPERAND_CRQC :
 925       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_5u21);
 926       break;
 927     case MEP_OPERAND_CRQP :
 928       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_5u13);
 929       break;
 930     case MEP_OPERAND_CSRN :
 931       errmsg = parse_csrn (cd, strp, & mep_cgen_opval_h_csr, & fields->f_csrn);
 932       break;
 933     case MEP_OPERAND_CSRN_IDX :
 934       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CSRN_IDX, (unsigned long *) (& fields->f_csrn));
 935       break;
 936     case MEP_OPERAND_DBG :
 937       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
 938       break;
 939     case MEP_OPERAND_DEPC :
 940       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
 941       break;
 942     case MEP_OPERAND_EPC :
 943       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
 944       break;
 945     case MEP_OPERAND_EXC :
 946       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
 947       break;
 948     case MEP_OPERAND_HI :
 949       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
 950       break;
 951     case MEP_OPERAND_IMM16P0 :
 952       errmsg = parse_unsigned16_range (cd, strp, MEP_OPERAND_IMM16P0, (unsigned long *) (& fields->f_ivc2_imm16p0));
 953       break;
 954     case MEP_OPERAND_IMM3P12 :
 955       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM3P12, (unsigned long *) (& fields->f_ivc2_3u12));
 956       break;
 957     case MEP_OPERAND_IMM3P25 :
 958       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM3P25, (unsigned long *) (& fields->f_ivc2_3u25));
 959       break;
 960     case MEP_OPERAND_IMM3P4 :
 961       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM3P4, (unsigned long *) (& fields->f_ivc2_3u4));
 962       break;
 963     case MEP_OPERAND_IMM3P5 :
 964       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM3P5, (unsigned long *) (& fields->f_ivc2_3u5));
 965       break;
 966     case MEP_OPERAND_IMM3P9 :
 967       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM3P9, (unsigned long *) (& fields->f_ivc2_3u9));
 968       break;
 969     case MEP_OPERAND_IMM4P10 :
 970       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM4P10, (unsigned long *) (& fields->f_ivc2_4u10));
 971       break;
 972     case MEP_OPERAND_IMM4P4 :
 973       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM4P4, (unsigned long *) (& fields->f_ivc2_4u4));
 974       break;
 975     case MEP_OPERAND_IMM4P8 :
 976       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM4P8, (unsigned long *) (& fields->f_ivc2_4u8));
 977       break;
 978     case MEP_OPERAND_IMM5P23 :
 979       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM5P23, (unsigned long *) (& fields->f_ivc2_5u23));
 980       break;
 981     case MEP_OPERAND_IMM5P3 :
 982       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM5P3, (unsigned long *) (& fields->f_ivc2_5u3));
 983       break;
 984     case MEP_OPERAND_IMM5P7 :
 985       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM5P7, (unsigned long *) (& fields->f_ivc2_5u7));
 986       break;
 987     case MEP_OPERAND_IMM5P8 :
 988       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM5P8, (unsigned long *) (& fields->f_ivc2_5u8));
 989       break;
 990     case MEP_OPERAND_IMM6P2 :
 991       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM6P2, (unsigned long *) (& fields->f_ivc2_6u2));
 992       break;
 993     case MEP_OPERAND_IMM6P6 :
 994       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM6P6, (unsigned long *) (& fields->f_ivc2_6u6));
 995       break;
 996     case MEP_OPERAND_IMM8P0 :
 997       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM8P0, (unsigned long *) (& fields->f_ivc2_8u0));
 998       break;
 999     case MEP_OPERAND_IMM8P20 :
1000       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM8P20, (unsigned long *) (& fields->f_ivc2_8u20));
1001       break;
1002     case MEP_OPERAND_IMM8P4 :
1003       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM8P4, (unsigned long *) (& fields->f_ivc2_8u4));
1004       break;
1005     case MEP_OPERAND_IVC_X_0_2 :
1006       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_0_2, (unsigned long *) (& fields->f_ivc2_2u0));
1007       break;
1008     case MEP_OPERAND_IVC_X_0_3 :
1009       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_0_3, (unsigned long *) (& fields->f_ivc2_3u0));
1010       break;
1011     case MEP_OPERAND_IVC_X_0_4 :
1012       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_0_4, (unsigned long *) (& fields->f_ivc2_4u0));
1013       break;
1014     case MEP_OPERAND_IVC_X_0_5 :
1015       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_0_5, (unsigned long *) (& fields->f_ivc2_5u0));
1016       break;
1017     case MEP_OPERAND_IVC_X_6_1 :
1018       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_6_1, (unsigned long *) (& fields->f_ivc2_1u6));
1019       break;
1020     case MEP_OPERAND_IVC_X_6_2 :
1021       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_6_2, (unsigned long *) (& fields->f_ivc2_2u6));
1022       break;
1023     case MEP_OPERAND_IVC_X_6_3 :
1024       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_6_3, (unsigned long *) (& fields->f_ivc2_3u6));
1025       break;
1026     case MEP_OPERAND_IVC2_ACC0_0 :
1027       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1028       break;
1029     case MEP_OPERAND_IVC2_ACC0_1 :
1030       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1031       break;
1032     case MEP_OPERAND_IVC2_ACC0_2 :
1033       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1034       break;
1035     case MEP_OPERAND_IVC2_ACC0_3 :
1036       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1037       break;
1038     case MEP_OPERAND_IVC2_ACC0_4 :
1039       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1040       break;
1041     case MEP_OPERAND_IVC2_ACC0_5 :
1042       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1043       break;
1044     case MEP_OPERAND_IVC2_ACC0_6 :
1045       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1046       break;
1047     case MEP_OPERAND_IVC2_ACC0_7 :
1048       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1049       break;
1050     case MEP_OPERAND_IVC2_ACC1_0 :
1051       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1052       break;
1053     case MEP_OPERAND_IVC2_ACC1_1 :
1054       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1055       break;
1056     case MEP_OPERAND_IVC2_ACC1_2 :
1057       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1058       break;
1059     case MEP_OPERAND_IVC2_ACC1_3 :
1060       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1061       break;
1062     case MEP_OPERAND_IVC2_ACC1_4 :
1063       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1064       break;
1065     case MEP_OPERAND_IVC2_ACC1_5 :
1066       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1067       break;
1068     case MEP_OPERAND_IVC2_ACC1_6 :
1069       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1070       break;
1071     case MEP_OPERAND_IVC2_ACC1_7 :
1072       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1073       break;
1074     case MEP_OPERAND_IVC2_CC :
1075       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1076       break;
1077     case MEP_OPERAND_IVC2_COFA0 :
1078       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1079       break;
1080     case MEP_OPERAND_IVC2_COFA1 :
1081       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1082       break;
1083     case MEP_OPERAND_IVC2_COFR0 :
1084       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1085       break;
1086     case MEP_OPERAND_IVC2_COFR1 :
1087       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1088       break;
1089     case MEP_OPERAND_IVC2_CSAR0 :
1090       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1091       break;
1092     case MEP_OPERAND_IVC2_CSAR1 :
1093       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1094       break;
1095     case MEP_OPERAND_IVC2C3CCRN :
1096       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & fields->f_ivc2_ccrn_c3);
1097       break;
1098     case MEP_OPERAND_IVC2CCRN :
1099       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & fields->f_ivc2_ccrn);
1100       break;
1101     case MEP_OPERAND_IVC2CRN :
1102       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_crnx);
1103       break;
1104     case MEP_OPERAND_IVC2RM :
1105       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_ivc2_crm);
1106       break;
1107     case MEP_OPERAND_LO :
1108       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1109       break;
1110     case MEP_OPERAND_LP :
1111       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1112       break;
1113     case MEP_OPERAND_MB0 :
1114       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1115       break;
1116     case MEP_OPERAND_MB1 :
1117       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1118       break;
1119     case MEP_OPERAND_ME0 :
1120       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1121       break;
1122     case MEP_OPERAND_ME1 :
1123       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1124       break;
1125     case MEP_OPERAND_NPC :
1126       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1127       break;
1128     case MEP_OPERAND_OPT :
1129       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1130       break;
1131     case MEP_OPERAND_PCABS24A2 :
1132       errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_PCABS24A2, (unsigned long *) (& fields->f_24u5a2n));
1133       break;
1134     case MEP_OPERAND_PCREL12A2 :
1135       errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL12A2, (long *) (& fields->f_12s4a2));
1136       break;
1137     case MEP_OPERAND_PCREL17A2 :
1138       errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL17A2, (long *) (& fields->f_17s16a2));
1139       break;
1140     case MEP_OPERAND_PCREL24A2 :
1141       errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL24A2, (long *) (& fields->f_24s5a2n));
1142       break;
1143     case MEP_OPERAND_PCREL8A2 :
1144       errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL8A2, (long *) (& fields->f_8s8a2));
1145       break;
1146     case MEP_OPERAND_PSW :
1147       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1148       break;
1149     case MEP_OPERAND_R0 :
1150       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk);
1151       break;
1152     case MEP_OPERAND_R1 :
1153       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk);
1154       break;
1155     case MEP_OPERAND_RL :
1156       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rl);
1157       break;
1158     case MEP_OPERAND_RL5 :
1159       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rl5);
1160       break;
1161     case MEP_OPERAND_RM :
1162       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rm);
1163       break;
1164     case MEP_OPERAND_RMA :
1165       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rm);
1166       break;
1167     case MEP_OPERAND_RN :
1168       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1169       break;
1170     case MEP_OPERAND_RN3 :
1171       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1172       break;
1173     case MEP_OPERAND_RN3C :
1174       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1175       break;
1176     case MEP_OPERAND_RN3L :
1177       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1178       break;
1179     case MEP_OPERAND_RN3S :
1180       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1181       break;
1182     case MEP_OPERAND_RN3UC :
1183       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1184       break;
1185     case MEP_OPERAND_RN3UL :
1186       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1187       break;
1188     case MEP_OPERAND_RN3US :
1189       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1190       break;
1191     case MEP_OPERAND_RNC :
1192       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1193       break;
1194     case MEP_OPERAND_RNL :
1195       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1196       break;
1197     case MEP_OPERAND_RNS :
1198       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1199       break;
1200     case MEP_OPERAND_RNUC :
1201       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1202       break;
1203     case MEP_OPERAND_RNUL :
1204       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1205       break;
1206     case MEP_OPERAND_RNUS :
1207       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1208       break;
1209     case MEP_OPERAND_SAR :
1210       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1211       break;
1212     case MEP_OPERAND_SDISP16 :
1213       errmsg = parse_signed16 (cd, strp, MEP_OPERAND_SDISP16, (long *) (& fields->f_16s16));
1214       break;
1215     case MEP_OPERAND_SIMM16 :
1216       errmsg = parse_signed16 (cd, strp, MEP_OPERAND_SIMM16, (long *) (& fields->f_16s16));
1217       break;
1218     case MEP_OPERAND_SIMM16P0 :
1219       errmsg = parse_signed16_range (cd, strp, MEP_OPERAND_SIMM16P0, (long *) (& fields->f_ivc2_simm16p0));
1220       break;
1221     case MEP_OPERAND_SIMM6 :
1222       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM6, (long *) (& fields->f_6s8));
1223       break;
1224     case MEP_OPERAND_SIMM8 :
1225       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM8, (long *) (& fields->f_8s8));
1226       break;
1227     case MEP_OPERAND_SIMM8P0 :
1228       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM8P0, (long *) (& fields->f_ivc2_8s0));
1229       break;
1230     case MEP_OPERAND_SIMM8P20 :
1231       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM8P20, (long *) (& fields->f_ivc2_8s20));
1232       break;
1233     case MEP_OPERAND_SIMM8P4 :
1234       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM8P4, (long *) (& fields->f_ivc2_8s4));
1235       break;
1236     case MEP_OPERAND_SP :
1237       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk);
1238       break;
1239     case MEP_OPERAND_SPR :
1240       errmsg = parse_spreg (cd, strp, & mep_cgen_opval_h_gpr, & junk);
1241       break;
1242     case MEP_OPERAND_TP :
1243       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk);
1244       break;
1245     case MEP_OPERAND_TPR :
1246       errmsg = parse_tpreg (cd, strp, & mep_cgen_opval_h_gpr, & junk);
1247       break;
1248     case MEP_OPERAND_UDISP2 :
1249       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_UDISP2, (long *) (& fields->f_2u6));
1250       break;
1251     case MEP_OPERAND_UDISP7 :
1252       errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7, (unsigned long *) (& fields->f_7u9));
1253       break;
1254     case MEP_OPERAND_UDISP7A2 :
1255       errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7A2, (unsigned long *) (& fields->f_7u9a2));
1256       break;
1257     case MEP_OPERAND_UDISP7A4 :
1258       errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7A4, (unsigned long *) (& fields->f_7u9a4));
1259       break;
1260     case MEP_OPERAND_UIMM16 :
1261       errmsg = parse_unsigned16 (cd, strp, MEP_OPERAND_UIMM16, (unsigned long *) (& fields->f_16u16));
1262       break;
1263     case MEP_OPERAND_UIMM2 :
1264       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM2, (unsigned long *) (& fields->f_2u10));
1265       break;
1266     case MEP_OPERAND_UIMM24 :
1267       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM24, (unsigned long *) (& fields->f_24u8n));
1268       break;
1269     case MEP_OPERAND_UIMM3 :
1270       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM3, (unsigned long *) (& fields->f_3u5));
1271       break;
1272     case MEP_OPERAND_UIMM4 :
1273       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM4, (unsigned long *) (& fields->f_4u8));
1274       break;
1275     case MEP_OPERAND_UIMM5 :
1276       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM5, (unsigned long *) (& fields->f_5u8));
1277       break;
1278     case MEP_OPERAND_UIMM7A4 :
1279       errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_UIMM7A4, (unsigned long *) (& fields->f_7u9a4));
1280       break;
1281     case MEP_OPERAND_ZERO :
1282       errmsg = parse_zero (cd, strp, MEP_OPERAND_ZERO, (long *) (& junk));
1283       break;
1284
1285     default :
1286       /* xgettext:c-format */
1287       fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
1288       abort ();
1289   }
1290
1291   return errmsg;
1292 }
1293
1294 cgen_parse_fn * const mep_cgen_parse_handlers[] =
1295 {
1296   parse_insn_normal,
1297 };
1298
1299 void
1300 mep_cgen_init_asm (CGEN_CPU_DESC cd)
1301 {
1302   mep_cgen_init_opcode_table (cd);
1303   mep_cgen_init_ibld_table (cd);
1304   cd->parse_handlers = & mep_cgen_parse_handlers[0];
1305   cd->parse_operand = mep_cgen_parse_operand;
1306 #ifdef CGEN_ASM_INIT_HOOK
1307 CGEN_ASM_INIT_HOOK
1308 #endif
1309 }
1310
1311 \f
1312
1313 /* Regex construction routine.
1314
1315    This translates an opcode syntax string into a regex string,
1316    by replacing any non-character syntax element (such as an
1317    opcode) with the pattern '.*'
1318
1319    It then compiles the regex and stores it in the opcode, for
1320    later use by mep_cgen_assemble_insn
1321
1322    Returns NULL for success, an error message for failure.  */
1323
1324 char *
1325 mep_cgen_build_insn_regex (CGEN_INSN *insn)
1326 {
1327   CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
1328   const char *mnem = CGEN_INSN_MNEMONIC (insn);
1329   char rxbuf[CGEN_MAX_RX_ELEMENTS];
1330   char *rx = rxbuf;
1331   const CGEN_SYNTAX_CHAR_TYPE *syn;
1332   int reg_err;
1333
1334   syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
1335
1336   /* Mnemonics come first in the syntax string.  */
1337   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
1338     return _("missing mnemonic in syntax string");
1339   ++syn;
1340
1341   /* Generate a case sensitive regular expression that emulates case
1342      insensitive matching in the "C" locale.  We cannot generate a case
1343      insensitive regular expression because in Turkish locales, 'i' and 'I'
1344      are not equal modulo case conversion.  */
1345
1346   /* Copy the literal mnemonic out of the insn.  */
1347   for (; *mnem; mnem++)
1348     {
1349       char c = *mnem;
1350
1351       if (ISALPHA (c))
1352         {
1353           *rx++ = '[';
1354           *rx++ = TOLOWER (c);
1355           *rx++ = TOUPPER (c);
1356           *rx++ = ']';
1357         }
1358       else
1359         *rx++ = c;
1360     }
1361
1362   /* Copy any remaining literals from the syntax string into the rx.  */
1363   for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
1364     {
1365       if (CGEN_SYNTAX_CHAR_P (* syn))
1366         {
1367           char c = CGEN_SYNTAX_CHAR (* syn);
1368
1369           switch (c)
1370             {
1371               /* Escape any regex metacharacters in the syntax.  */
1372             case '.': case '[': case '\\':
1373             case '*': case '^': case '$':
1374
1375 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
1376             case '?': case '{': case '}':
1377             case '(': case ')': case '*':
1378             case '|': case '+': case ']':
1379 #endif
1380               *rx++ = '\\';
1381               *rx++ = c;
1382               break;
1383
1384             default:
1385               if (ISALPHA (c))
1386                 {
1387                   *rx++ = '[';
1388                   *rx++ = TOLOWER (c);
1389                   *rx++ = TOUPPER (c);
1390                   *rx++ = ']';
1391                 }
1392               else
1393                 *rx++ = c;
1394               break;
1395             }
1396         }
1397       else
1398         {
1399           /* Replace non-syntax fields with globs.  */
1400           *rx++ = '.';
1401           *rx++ = '*';
1402         }
1403     }
1404
1405   /* Trailing whitespace ok.  */
1406   * rx++ = '[';
1407   * rx++ = ' ';
1408   * rx++ = '\t';
1409   * rx++ = ']';
1410   * rx++ = '*';
1411
1412   /* But anchor it after that.  */
1413   * rx++ = '$';
1414   * rx = '\0';
1415
1416   CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
1417   reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
1418
1419   if (reg_err == 0)
1420     return NULL;
1421   else
1422     {
1423       static char msg[80];
1424
1425       regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
1426       regfree ((regex_t *) CGEN_INSN_RX (insn));
1427       free (CGEN_INSN_RX (insn));
1428       (CGEN_INSN_RX (insn)) = NULL;
1429       return msg;
1430     }
1431 }
1432
1433 \f
1434 /* Default insn parser.
1435
1436    The syntax string is scanned and operands are parsed and stored in FIELDS.
1437    Relocs are queued as we go via other callbacks.
1438
1439    ??? Note that this is currently an all-or-nothing parser.  If we fail to
1440    parse the instruction, we return 0 and the caller will start over from
1441    the beginning.  Backtracking will be necessary in parsing subexpressions,
1442    but that can be handled there.  Not handling backtracking here may get
1443    expensive in the case of the m68k.  Deal with later.
1444
1445    Returns NULL for success, an error message for failure.  */
1446
1447 static const char *
1448 parse_insn_normal (CGEN_CPU_DESC cd,
1449                    const CGEN_INSN *insn,
1450                    const char **strp,
1451                    CGEN_FIELDS *fields)
1452 {
1453   /* ??? Runtime added insns not handled yet.  */
1454   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
1455   const char *str = *strp;
1456   const char *errmsg;
1457   const char *p;
1458   const CGEN_SYNTAX_CHAR_TYPE * syn;
1459 #ifdef CGEN_MNEMONIC_OPERANDS
1460   /* FIXME: wip */
1461   int past_opcode_p;
1462 #endif
1463
1464   /* For now we assume the mnemonic is first (there are no leading operands).
1465      We can parse it without needing to set up operand parsing.
1466      GAS's input scrubber will ensure mnemonics are lowercase, but we may
1467      not be called from GAS.  */
1468   p = CGEN_INSN_MNEMONIC (insn);
1469   while (*p && TOLOWER (*p) == TOLOWER (*str))
1470     ++p, ++str;
1471
1472   if (* p)
1473     return _("unrecognized instruction");
1474
1475 #ifndef CGEN_MNEMONIC_OPERANDS
1476   if (* str && ! ISSPACE (* str))
1477     return _("unrecognized instruction");
1478 #endif
1479
1480   CGEN_INIT_PARSE (cd);
1481   cgen_init_parse_operand (cd);
1482 #ifdef CGEN_MNEMONIC_OPERANDS
1483   past_opcode_p = 0;
1484 #endif
1485
1486   /* We don't check for (*str != '\0') here because we want to parse
1487      any trailing fake arguments in the syntax string.  */
1488   syn = CGEN_SYNTAX_STRING (syntax);
1489
1490   /* Mnemonics come first for now, ensure valid string.  */
1491   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
1492     abort ();
1493
1494   ++syn;
1495
1496   while (* syn != 0)
1497     {
1498       /* Non operand chars must match exactly.  */
1499       if (CGEN_SYNTAX_CHAR_P (* syn))
1500         {
1501           /* FIXME: While we allow for non-GAS callers above, we assume the
1502              first char after the mnemonic part is a space.  */
1503           /* FIXME: We also take inappropriate advantage of the fact that
1504              GAS's input scrubber will remove extraneous blanks.  */
1505           if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
1506             {
1507 #ifdef CGEN_MNEMONIC_OPERANDS
1508               if (CGEN_SYNTAX_CHAR(* syn) == ' ')
1509                 past_opcode_p = 1;
1510 #endif
1511               ++ syn;
1512               ++ str;
1513             }
1514           else if (*str)
1515             {
1516               /* Syntax char didn't match.  Can't be this insn.  */
1517               static char msg [80];
1518
1519               /* xgettext:c-format */
1520               sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
1521                        CGEN_SYNTAX_CHAR(*syn), *str);
1522               return msg;
1523             }
1524           else
1525             {
1526               /* Ran out of input.  */
1527               static char msg [80];
1528
1529               /* xgettext:c-format */
1530               sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
1531                        CGEN_SYNTAX_CHAR(*syn));
1532               return msg;
1533             }
1534           continue;
1535         }
1536
1537       /* We have an operand of some sort.  */
1538       errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
1539                                           &str, fields);
1540       if (errmsg)
1541         return errmsg;
1542
1543       /* Done with this operand, continue with next one.  */
1544       ++ syn;
1545     }
1546
1547   /* If we're at the end of the syntax string, we're done.  */
1548   if (* syn == 0)
1549     {
1550       /* FIXME: For the moment we assume a valid `str' can only contain
1551          blanks now.  IE: We needn't try again with a longer version of
1552          the insn and it is assumed that longer versions of insns appear
1553          before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
1554       while (ISSPACE (* str))
1555         ++ str;
1556
1557       if (* str != '\0')
1558         return _("junk at end of line"); /* FIXME: would like to include `str' */
1559
1560       return NULL;
1561     }
1562
1563   /* We couldn't parse it.  */
1564   return _("unrecognized instruction");
1565 }
1566 \f
1567 /* Main entry point.
1568    This routine is called for each instruction to be assembled.
1569    STR points to the insn to be assembled.
1570    We assume all necessary tables have been initialized.
1571    The assembled instruction, less any fixups, is stored in BUF.
1572    Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
1573    still needs to be converted to target byte order, otherwise BUF is an array
1574    of bytes in target byte order.
1575    The result is a pointer to the insn's entry in the opcode table,
1576    or NULL if an error occured (an error message will have already been
1577    printed).
1578
1579    Note that when processing (non-alias) macro-insns,
1580    this function recurses.
1581
1582    ??? It's possible to make this cpu-independent.
1583    One would have to deal with a few minor things.
1584    At this point in time doing so would be more of a curiosity than useful
1585    [for example this file isn't _that_ big], but keeping the possibility in
1586    mind helps keep the design clean.  */
1587
1588 const CGEN_INSN *
1589 mep_cgen_assemble_insn (CGEN_CPU_DESC cd,
1590                            const char *str,
1591                            CGEN_FIELDS *fields,
1592                            CGEN_INSN_BYTES_PTR buf,
1593                            char **errmsg)
1594 {
1595   const char *start;
1596   CGEN_INSN_LIST *ilist;
1597   const char *parse_errmsg = NULL;
1598   const char *insert_errmsg = NULL;
1599   int recognized_mnemonic = 0;
1600
1601   /* Skip leading white space.  */
1602   while (ISSPACE (* str))
1603     ++ str;
1604
1605   /* The instructions are stored in hashed lists.
1606      Get the first in the list.  */
1607   ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
1608
1609   /* Keep looking until we find a match.  */
1610   start = str;
1611   for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
1612     {
1613       const CGEN_INSN *insn = ilist->insn;
1614       recognized_mnemonic = 1;
1615
1616 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
1617       /* Not usually needed as unsupported opcodes
1618          shouldn't be in the hash lists.  */
1619       /* Is this insn supported by the selected cpu?  */
1620       if (! mep_cgen_insn_supported (cd, insn))
1621         continue;
1622 #endif
1623       /* If the RELAXED attribute is set, this is an insn that shouldn't be
1624          chosen immediately.  Instead, it is used during assembler/linker
1625          relaxation if possible.  */
1626       if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
1627         continue;
1628
1629       str = start;
1630
1631       /* Skip this insn if str doesn't look right lexically.  */
1632       if (CGEN_INSN_RX (insn) != NULL &&
1633           regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
1634         continue;
1635
1636       /* Allow parse/insert handlers to obtain length of insn.  */
1637       CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
1638
1639       parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
1640       if (parse_errmsg != NULL)
1641         continue;
1642
1643       /* ??? 0 is passed for `pc'.  */
1644       insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
1645                                                  (bfd_vma) 0);
1646       if (insert_errmsg != NULL)
1647         continue;
1648
1649       /* It is up to the caller to actually output the insn and any
1650          queued relocs.  */
1651       return insn;
1652     }
1653
1654   {
1655     static char errbuf[150];
1656 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
1657     const char *tmp_errmsg;
1658
1659     /* If requesting verbose error messages, use insert_errmsg.
1660        Failing that, use parse_errmsg.  */
1661     tmp_errmsg = (insert_errmsg ? insert_errmsg :
1662                   parse_errmsg ? parse_errmsg :
1663                   recognized_mnemonic ?
1664                   _("unrecognized form of instruction") :
1665                   _("unrecognized instruction"));
1666
1667     if (strlen (start) > 50)
1668       /* xgettext:c-format */
1669       sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
1670     else
1671       /* xgettext:c-format */
1672       sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
1673 #else
1674     if (strlen (start) > 50)
1675       /* xgettext:c-format */
1676       sprintf (errbuf, _("bad instruction `%.50s...'"), start);
1677     else
1678       /* xgettext:c-format */
1679       sprintf (errbuf, _("bad instruction `%.50s'"), start);
1680 #endif
1681
1682     *errmsg = errbuf;
1683     return NULL;
1684   }
1685 }