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 mac_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           mac_arg = (*(e + 1) - '1');
 648           /* printf("replacing `%d with %s\n", mac_arg+1, args[mac_arg].start); */
 649           result = str_append (result, args[mac_arg].start, args[mac_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 *pmacro = NULL;
 682   char *expansion = 0;
 683   char *result = 0;
 684
 685   while (*in)
 686     {
 687       switch (state)
 688         {
 689         case IN_TEXT:
 690           if (*in == '%' && *(in + 1) && (!first_only || num_expansions == 0))
 691             {
 692               pmacro = lookup_macro (in + 1);
 693               if (pmacro)
 694                 {
 695                   /* printf("entering state %d at '%s'...\n", state, in); */
 696                   result = str_append (result, mark, in - mark);
 697                   mark = in;
 698                   in += 1 + strlen (pmacro->name);
 699                   while (*in == ' ') ++in;
 700                   if (*in != '(')
 701                     {
 702                       state = IN_TEXT;
 703                       pmacro = NULL;
 704                     }
 705                   else
 706                     {
 707                       state = IN_ARGS;
 708                       narg = 0;
 709                       args[narg].start = in + 1;
 710                       args[narg].len = 0;
 711                       mark = in + 1;
 712                     }
 713                 }
 714             }
 715           break;
 716         case IN_ARGS:
 717           if (depth == 0)
 718             {
 719               switch (*in)
 720                 {
 721                 case ',':
 722                   narg++;
 723                   args[narg].start = (in + 1);
 724                   args[narg].len = 0;
 725                   break;
 726                 case ')':
 727                   state = IN_TEXT;
 728                   /* printf("entering state %d at '%s'...\n", state, in); */
 729                   if (pmacro)
 730                     {
 731                       expansion = 0;
 732                       expansion = expand_macro (args, narg, pmacro);
 733                       num_expansions++;
 734                       if (expansion)
 735                         {
 736                           result = str_append (result, expansion, strlen (expansion));
 737                           free (expansion);
 738                         }
 739                     }
 740                   else
 741                     {
 742                       result = str_append (result, mark, in - mark);
 743                     }
 744                   pmacro = NULL;
 745                   mark = in + 1;
 746                   break;
 747                 case '(':
 748                   depth++;
 749                 default:
 750                   args[narg].len++;
 751                   break;
 752                 }
 753             }
 754           else
 755             {
 756               if (*in == ')')
 757                 depth--;
 758               if (narg > -1)
 759                 args[narg].len++;
 760             }
 761
 762         }
 763       ++in;
 764     }
 765
 766   if (mark != in)
 767     result = str_append (result, mark, in - mark);
 768
 769   return result;
 770 }
 771
 772 #undef IN_ARGS
 773 #undef IN_TEXT
 774 #undef MAXARGS
 775
 776
 777 /* END LIGHTWEIGHT MACRO PROCESSOR.  */
 778
 779 const char * mep_cgen_parse_operand
 780   (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
 781
 782 const char *
 783 mep_cgen_expand_macros_and_parse_operand (CGEN_CPU_DESC cd, int opindex,
 784                                           const char ** strp_in, CGEN_FIELDS * fields)
 785 {
 786   const char * errmsg = NULL;
 787   char *str = 0, *hold = 0;
 788   const char **strp = 0;
 789
 790   /* Set up a new pointer to macro-expanded string.  */
 791   str = expand_string (*strp_in, 1);
 792   /* fprintf (stderr, " expanded <<%s>> to <<%s>>\n", *strp_in, str); */
 793
 794   hold = str;
 795   strp = (const char **)(&str);
 796
 797   errmsg = mep_cgen_parse_operand (cd, opindex, strp, fields);
 798
 799   /* Now work out the advance.  */
 800   if (strlen (str) == 0)
 801     *strp_in += strlen (*strp_in);
 802
 803   else
 804     {
 805       if (strstr (*strp_in, str))
 806         /* A macro-expansion was pulled off the front.  */
 807         *strp_in = strstr (*strp_in, str);
 808       else
 809         /* A non-macro-expansion was pulled off the front.  */
 810         *strp_in += (str - hold);
 811     }
 812
 813   if (hold)
 814     free (hold);
 815
 816   return errmsg;
 817 }
 818
 819 #define CGEN_ASM_INIT_HOOK (cd->parse_operand = mep_cgen_expand_macros_and_parse_operand);
 820
 821 /* -- dis.c */
 822
 823 const char * mep_cgen_parse_operand
 824   (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
 825
 826 /* Main entry point for operand parsing.
 827
 828    This function is basically just a big switch statement.  Earlier versions
 829    used tables to look up the function to use, but
 830    - if the table contains both assembler and disassembler functions then
 831      the disassembler contains much of the assembler and vice-versa,
 832    - there's a lot of inlining possibilities as things grow,
 833    - using a switch statement avoids the function call overhead.
 834
 835    This function could be moved into `parse_insn_normal', but keeping it
 836    separate makes clear the interface between `parse_insn_normal' and each of
 837    the handlers.  */
 838
 839 const char *
 840 mep_cgen_parse_operand (CGEN_CPU_DESC cd,
 841                            int opindex,
 842                            const char ** strp,
 843                            CGEN_FIELDS * fields)
 844 {
 845   const char * errmsg = NULL;
 846   /* Used by scalar operands that still need to be parsed.  */
 847   long junk ATTRIBUTE_UNUSED;
 848
 849   switch (opindex)
 850     {
 851     case MEP_OPERAND_ADDR24A4 :
 852       errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_ADDR24A4, (unsigned long *) (& fields->f_24u8a4n));
 853       break;
 854     case MEP_OPERAND_C5RMUIMM20 :
 855       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_C5RMUIMM20, (unsigned long *) (& fields->f_c5_rmuimm20));
 856       break;
 857     case MEP_OPERAND_C5RNMUIMM24 :
 858       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_C5RNMUIMM24, (unsigned long *) (& fields->f_c5_rnmuimm24));
 859       break;
 860     case MEP_OPERAND_CALLNUM :
 861       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CALLNUM, (unsigned long *) (& fields->f_callnum));
 862       break;
 863     case MEP_OPERAND_CCCC :
 864       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CCCC, (unsigned long *) (& fields->f_rm));
 865       break;
 866     case MEP_OPERAND_CCRN :
 867       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr, & fields->f_ccrn);
 868       break;
 869     case MEP_OPERAND_CDISP10 :
 870       errmsg = parse_cdisp10 (cd, strp, MEP_OPERAND_CDISP10, (long *) (& fields->f_cdisp10));
 871       break;
 872     case MEP_OPERAND_CDISP10A2 :
 873       errmsg = parse_cdisp10 (cd, strp, MEP_OPERAND_CDISP10A2, (long *) (& fields->f_cdisp10));
 874       break;
 875     case MEP_OPERAND_CDISP10A4 :
 876       errmsg = parse_cdisp10 (cd, strp, MEP_OPERAND_CDISP10A4, (long *) (& fields->f_cdisp10));
 877       break;
 878     case MEP_OPERAND_CDISP10A8 :
 879       errmsg = parse_cdisp10 (cd, strp, MEP_OPERAND_CDISP10A8, (long *) (& fields->f_cdisp10));
 880       break;
 881     case MEP_OPERAND_CDISP12 :
 882       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_CDISP12, (long *) (& fields->f_12s20));
 883       break;
 884     case MEP_OPERAND_CIMM4 :
 885       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CIMM4, (unsigned long *) (& fields->f_rn));
 886       break;
 887     case MEP_OPERAND_CIMM5 :
 888       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CIMM5, (unsigned long *) (& fields->f_5u24));
 889       break;
 890     case MEP_OPERAND_CODE16 :
 891       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CODE16, (unsigned long *) (& fields->f_16u16));
 892       break;
 893     case MEP_OPERAND_CODE24 :
 894       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CODE24, (unsigned long *) (& fields->f_24u4n));
 895       break;
 896     case MEP_OPERAND_CP_FLAG :
 897       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr, & junk);
 898       break;
 899     case MEP_OPERAND_CRN :
 900       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr, & fields->f_crn);
 901       break;
 902     case MEP_OPERAND_CRN64 :
 903       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_crn);
 904       break;
 905     case MEP_OPERAND_CRNX :
 906       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr, & fields->f_crnx);
 907       break;
 908     case MEP_OPERAND_CRNX64 :
 909       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_crnx);
 910       break;
 911     case MEP_OPERAND_CROC :
 912       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_5u7);
 913       break;
 914     case MEP_OPERAND_CROP :
 915       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_5u23);
 916       break;
 917     case MEP_OPERAND_CRPC :
 918       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_5u26);
 919       break;
 920     case MEP_OPERAND_CRPP :
 921       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_5u18);
 922       break;
 923     case MEP_OPERAND_CRQC :
 924       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_5u21);
 925       break;
 926     case MEP_OPERAND_CRQP :
 927       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_5u13);
 928       break;
 929     case MEP_OPERAND_CSRN :
 930       errmsg = parse_csrn (cd, strp, & mep_cgen_opval_h_csr, & fields->f_csrn);
 931       break;
 932     case MEP_OPERAND_CSRN_IDX :
 933       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CSRN_IDX, (unsigned long *) (& fields->f_csrn));
 934       break;
 935     case MEP_OPERAND_DBG :
 936       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
 937       break;
 938     case MEP_OPERAND_DEPC :
 939       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
 940       break;
 941     case MEP_OPERAND_EPC :
 942       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
 943       break;
 944     case MEP_OPERAND_EXC :
 945       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
 946       break;
 947     case MEP_OPERAND_HI :
 948       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
 949       break;
 950     case MEP_OPERAND_IMM16P0 :
 951       errmsg = parse_unsigned16_range (cd, strp, MEP_OPERAND_IMM16P0, (unsigned long *) (& fields->f_ivc2_imm16p0));
 952       break;
 953     case MEP_OPERAND_IMM3P12 :
 954       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM3P12, (unsigned long *) (& fields->f_ivc2_3u12));
 955       break;
 956     case MEP_OPERAND_IMM3P25 :
 957       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM3P25, (unsigned long *) (& fields->f_ivc2_3u25));
 958       break;
 959     case MEP_OPERAND_IMM3P4 :
 960       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM3P4, (unsigned long *) (& fields->f_ivc2_3u4));
 961       break;
 962     case MEP_OPERAND_IMM3P5 :
 963       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM3P5, (unsigned long *) (& fields->f_ivc2_3u5));
 964       break;
 965     case MEP_OPERAND_IMM3P9 :
 966       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM3P9, (unsigned long *) (& fields->f_ivc2_3u9));
 967       break;
 968     case MEP_OPERAND_IMM4P10 :
 969       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM4P10, (unsigned long *) (& fields->f_ivc2_4u10));
 970       break;
 971     case MEP_OPERAND_IMM4P4 :
 972       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM4P4, (unsigned long *) (& fields->f_ivc2_4u4));
 973       break;
 974     case MEP_OPERAND_IMM4P8 :
 975       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM4P8, (unsigned long *) (& fields->f_ivc2_4u8));
 976       break;
 977     case MEP_OPERAND_IMM5P23 :
 978       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM5P23, (unsigned long *) (& fields->f_ivc2_5u23));
 979       break;
 980     case MEP_OPERAND_IMM5P3 :
 981       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM5P3, (unsigned long *) (& fields->f_ivc2_5u3));
 982       break;
 983     case MEP_OPERAND_IMM5P7 :
 984       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM5P7, (unsigned long *) (& fields->f_ivc2_5u7));
 985       break;
 986     case MEP_OPERAND_IMM5P8 :
 987       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM5P8, (unsigned long *) (& fields->f_ivc2_5u8));
 988       break;
 989     case MEP_OPERAND_IMM6P2 :
 990       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM6P2, (unsigned long *) (& fields->f_ivc2_6u2));
 991       break;
 992     case MEP_OPERAND_IMM6P6 :
 993       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM6P6, (unsigned long *) (& fields->f_ivc2_6u6));
 994       break;
 995     case MEP_OPERAND_IMM8P0 :
 996       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM8P0, (unsigned long *) (& fields->f_ivc2_8u0));
 997       break;
 998     case MEP_OPERAND_IMM8P20 :
 999       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM8P20, (unsigned long *) (& fields->f_ivc2_8u20));
1000       break;
1001     case MEP_OPERAND_IMM8P4 :
1002       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IMM8P4, (unsigned long *) (& fields->f_ivc2_8u4));
1003       break;
1004     case MEP_OPERAND_IVC_X_0_2 :
1005       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_0_2, (unsigned long *) (& fields->f_ivc2_2u0));
1006       break;
1007     case MEP_OPERAND_IVC_X_0_3 :
1008       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_0_3, (unsigned long *) (& fields->f_ivc2_3u0));
1009       break;
1010     case MEP_OPERAND_IVC_X_0_4 :
1011       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_0_4, (unsigned long *) (& fields->f_ivc2_4u0));
1012       break;
1013     case MEP_OPERAND_IVC_X_0_5 :
1014       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_0_5, (unsigned long *) (& fields->f_ivc2_5u0));
1015       break;
1016     case MEP_OPERAND_IVC_X_6_1 :
1017       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_6_1, (unsigned long *) (& fields->f_ivc2_1u6));
1018       break;
1019     case MEP_OPERAND_IVC_X_6_2 :
1020       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_6_2, (unsigned long *) (& fields->f_ivc2_2u6));
1021       break;
1022     case MEP_OPERAND_IVC_X_6_3 :
1023       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_IVC_X_6_3, (unsigned long *) (& fields->f_ivc2_3u6));
1024       break;
1025     case MEP_OPERAND_IVC2_ACC0_0 :
1026       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1027       break;
1028     case MEP_OPERAND_IVC2_ACC0_1 :
1029       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1030       break;
1031     case MEP_OPERAND_IVC2_ACC0_2 :
1032       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1033       break;
1034     case MEP_OPERAND_IVC2_ACC0_3 :
1035       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1036       break;
1037     case MEP_OPERAND_IVC2_ACC0_4 :
1038       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1039       break;
1040     case MEP_OPERAND_IVC2_ACC0_5 :
1041       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1042       break;
1043     case MEP_OPERAND_IVC2_ACC0_6 :
1044       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1045       break;
1046     case MEP_OPERAND_IVC2_ACC0_7 :
1047       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1048       break;
1049     case MEP_OPERAND_IVC2_ACC1_0 :
1050       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1051       break;
1052     case MEP_OPERAND_IVC2_ACC1_1 :
1053       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1054       break;
1055     case MEP_OPERAND_IVC2_ACC1_2 :
1056       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1057       break;
1058     case MEP_OPERAND_IVC2_ACC1_3 :
1059       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1060       break;
1061     case MEP_OPERAND_IVC2_ACC1_4 :
1062       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1063       break;
1064     case MEP_OPERAND_IVC2_ACC1_5 :
1065       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1066       break;
1067     case MEP_OPERAND_IVC2_ACC1_6 :
1068       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1069       break;
1070     case MEP_OPERAND_IVC2_ACC1_7 :
1071       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1072       break;
1073     case MEP_OPERAND_IVC2_CC :
1074       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1075       break;
1076     case MEP_OPERAND_IVC2_COFA0 :
1077       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1078       break;
1079     case MEP_OPERAND_IVC2_COFA1 :
1080       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1081       break;
1082     case MEP_OPERAND_IVC2_COFR0 :
1083       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1084       break;
1085     case MEP_OPERAND_IVC2_COFR1 :
1086       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1087       break;
1088     case MEP_OPERAND_IVC2_CSAR0 :
1089       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1090       break;
1091     case MEP_OPERAND_IVC2_CSAR1 :
1092       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & junk);
1093       break;
1094     case MEP_OPERAND_IVC2C3CCRN :
1095       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & fields->f_ivc2_ccrn_c3);
1096       break;
1097     case MEP_OPERAND_IVC2CCRN :
1098       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, & fields->f_ivc2_ccrn);
1099       break;
1100     case MEP_OPERAND_IVC2CRN :
1101       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_ivc2_crnx);
1102       break;
1103     case MEP_OPERAND_IVC2RM :
1104       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_ivc2_crm);
1105       break;
1106     case MEP_OPERAND_LO :
1107       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1108       break;
1109     case MEP_OPERAND_LP :
1110       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1111       break;
1112     case MEP_OPERAND_MB0 :
1113       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1114       break;
1115     case MEP_OPERAND_MB1 :
1116       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1117       break;
1118     case MEP_OPERAND_ME0 :
1119       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1120       break;
1121     case MEP_OPERAND_ME1 :
1122       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1123       break;
1124     case MEP_OPERAND_NPC :
1125       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1126       break;
1127     case MEP_OPERAND_OPT :
1128       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1129       break;
1130     case MEP_OPERAND_PCABS24A2 :
1131       errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_PCABS24A2, (unsigned long *) (& fields->f_24u5a2n));
1132       break;
1133     case MEP_OPERAND_PCREL12A2 :
1134       errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL12A2, (long *) (& fields->f_12s4a2));
1135       break;
1136     case MEP_OPERAND_PCREL17A2 :
1137       errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL17A2, (long *) (& fields->f_17s16a2));
1138       break;
1139     case MEP_OPERAND_PCREL24A2 :
1140       errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL24A2, (long *) (& fields->f_24s5a2n));
1141       break;
1142     case MEP_OPERAND_PCREL8A2 :
1143       errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL8A2, (long *) (& fields->f_8s8a2));
1144       break;
1145     case MEP_OPERAND_PSW :
1146       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1147       break;
1148     case MEP_OPERAND_R0 :
1149       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk);
1150       break;
1151     case MEP_OPERAND_R1 :
1152       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk);
1153       break;
1154     case MEP_OPERAND_RL :
1155       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rl);
1156       break;
1157     case MEP_OPERAND_RL5 :
1158       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rl5);
1159       break;
1160     case MEP_OPERAND_RM :
1161       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rm);
1162       break;
1163     case MEP_OPERAND_RMA :
1164       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rm);
1165       break;
1166     case MEP_OPERAND_RN :
1167       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1168       break;
1169     case MEP_OPERAND_RN3 :
1170       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1171       break;
1172     case MEP_OPERAND_RN3C :
1173       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1174       break;
1175     case MEP_OPERAND_RN3L :
1176       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1177       break;
1178     case MEP_OPERAND_RN3S :
1179       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1180       break;
1181     case MEP_OPERAND_RN3UC :
1182       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1183       break;
1184     case MEP_OPERAND_RN3UL :
1185       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1186       break;
1187     case MEP_OPERAND_RN3US :
1188       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3);
1189       break;
1190     case MEP_OPERAND_RNC :
1191       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1192       break;
1193     case MEP_OPERAND_RNL :
1194       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1195       break;
1196     case MEP_OPERAND_RNS :
1197       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1198       break;
1199     case MEP_OPERAND_RNUC :
1200       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1201       break;
1202     case MEP_OPERAND_RNUL :
1203       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1204       break;
1205     case MEP_OPERAND_RNUS :
1206       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn);
1207       break;
1208     case MEP_OPERAND_SAR :
1209       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk);
1210       break;
1211     case MEP_OPERAND_SDISP16 :
1212       errmsg = parse_signed16 (cd, strp, MEP_OPERAND_SDISP16, (long *) (& fields->f_16s16));
1213       break;
1214     case MEP_OPERAND_SIMM16 :
1215       errmsg = parse_signed16 (cd, strp, MEP_OPERAND_SIMM16, (long *) (& fields->f_16s16));
1216       break;
1217     case MEP_OPERAND_SIMM16P0 :
1218       errmsg = parse_signed16_range (cd, strp, MEP_OPERAND_SIMM16P0, (long *) (& fields->f_ivc2_simm16p0));
1219       break;
1220     case MEP_OPERAND_SIMM6 :
1221       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM6, (long *) (& fields->f_6s8));
1222       break;
1223     case MEP_OPERAND_SIMM8 :
1224       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM8, (long *) (& fields->f_8s8));
1225       break;
1226     case MEP_OPERAND_SIMM8P0 :
1227       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM8P0, (long *) (& fields->f_ivc2_8s0));
1228       break;
1229     case MEP_OPERAND_SIMM8P20 :
1230       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM8P20, (long *) (& fields->f_ivc2_8s20));
1231       break;
1232     case MEP_OPERAND_SIMM8P4 :
1233       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM8P4, (long *) (& fields->f_ivc2_8s4));
1234       break;
1235     case MEP_OPERAND_SP :
1236       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk);
1237       break;
1238     case MEP_OPERAND_SPR :
1239       errmsg = parse_spreg (cd, strp, & mep_cgen_opval_h_gpr, & junk);
1240       break;
1241     case MEP_OPERAND_TP :
1242       errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk);
1243       break;
1244     case MEP_OPERAND_TPR :
1245       errmsg = parse_tpreg (cd, strp, & mep_cgen_opval_h_gpr, & junk);
1246       break;
1247     case MEP_OPERAND_UDISP2 :
1248       errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_UDISP2, (long *) (& fields->f_2u6));
1249       break;
1250     case MEP_OPERAND_UDISP7 :
1251       errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7, (unsigned long *) (& fields->f_7u9));
1252       break;
1253     case MEP_OPERAND_UDISP7A2 :
1254       errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7A2, (unsigned long *) (& fields->f_7u9a2));
1255       break;
1256     case MEP_OPERAND_UDISP7A4 :
1257       errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7A4, (unsigned long *) (& fields->f_7u9a4));
1258       break;
1259     case MEP_OPERAND_UIMM16 :
1260       errmsg = parse_unsigned16 (cd, strp, MEP_OPERAND_UIMM16, (unsigned long *) (& fields->f_16u16));
1261       break;
1262     case MEP_OPERAND_UIMM2 :
1263       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM2, (unsigned long *) (& fields->f_2u10));
1264       break;
1265     case MEP_OPERAND_UIMM24 :
1266       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM24, (unsigned long *) (& fields->f_24u8n));
1267       break;
1268     case MEP_OPERAND_UIMM3 :
1269       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM3, (unsigned long *) (& fields->f_3u5));
1270       break;
1271     case MEP_OPERAND_UIMM4 :
1272       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM4, (unsigned long *) (& fields->f_4u8));
1273       break;
1274     case MEP_OPERAND_UIMM5 :
1275       errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM5, (unsigned long *) (& fields->f_5u8));
1276       break;
1277     case MEP_OPERAND_UIMM7A4 :
1278       errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_UIMM7A4, (unsigned long *) (& fields->f_7u9a4));
1279       break;
1280     case MEP_OPERAND_ZERO :
1281       errmsg = parse_zero (cd, strp, MEP_OPERAND_ZERO, (long *) (& junk));
1282       break;
1283
1284     default :
1285       /* xgettext:c-format */
1286       fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
1287       abort ();
1288   }
1289
1290   return errmsg;
1291 }
1292
1293 cgen_parse_fn * const mep_cgen_parse_handlers[] =
1294 {
1295   parse_insn_normal,
1296 };
1297
1298 void
1299 mep_cgen_init_asm (CGEN_CPU_DESC cd)
1300 {
1301   mep_cgen_init_opcode_table (cd);
1302   mep_cgen_init_ibld_table (cd);
1303   cd->parse_handlers = & mep_cgen_parse_handlers[0];
1304   cd->parse_operand = mep_cgen_parse_operand;
1305 #ifdef CGEN_ASM_INIT_HOOK
1306 CGEN_ASM_INIT_HOOK
1307 #endif
1308 }
1309
1310 \f
1311
1312 /* Regex construction routine.
1313
1314    This translates an opcode syntax string into a regex string,
1315    by replacing any non-character syntax element (such as an
1316    opcode) with the pattern '.*'
1317
1318    It then compiles the regex and stores it in the opcode, for
1319    later use by mep_cgen_assemble_insn
1320
1321    Returns NULL for success, an error message for failure.  */
1322
1323 char *
1324 mep_cgen_build_insn_regex (CGEN_INSN *insn)
1325 {
1326   CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
1327   const char *mnem = CGEN_INSN_MNEMONIC (insn);
1328   char rxbuf[CGEN_MAX_RX_ELEMENTS];
1329   char *rx = rxbuf;
1330   const CGEN_SYNTAX_CHAR_TYPE *syn;
1331   int reg_err;
1332
1333   syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
1334
1335   /* Mnemonics come first in the syntax string.  */
1336   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
1337     return _("missing mnemonic in syntax string");
1338   ++syn;
1339
1340   /* Generate a case sensitive regular expression that emulates case
1341      insensitive matching in the "C" locale.  We cannot generate a case
1342      insensitive regular expression because in Turkish locales, 'i' and 'I'
1343      are not equal modulo case conversion.  */
1344
1345   /* Copy the literal mnemonic out of the insn.  */
1346   for (; *mnem; mnem++)
1347     {
1348       char c = *mnem;
1349
1350       if (ISALPHA (c))
1351         {
1352           *rx++ = '[';
1353           *rx++ = TOLOWER (c);
1354           *rx++ = TOUPPER (c);
1355           *rx++ = ']';
1356         }
1357       else
1358         *rx++ = c;
1359     }
1360
1361   /* Copy any remaining literals from the syntax string into the rx.  */
1362   for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
1363     {
1364       if (CGEN_SYNTAX_CHAR_P (* syn))
1365         {
1366           char c = CGEN_SYNTAX_CHAR (* syn);
1367
1368           switch (c)
1369             {
1370               /* Escape any regex metacharacters in the syntax.  */
1371             case '.': case '[': case '\\':
1372             case '*': case '^': case '$':
1373
1374 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
1375             case '?': case '{': case '}':
1376             case '(': case ')': case '*':
1377             case '|': case '+': case ']':
1378 #endif
1379               *rx++ = '\\';
1380               *rx++ = c;
1381               break;
1382
1383             default:
1384               if (ISALPHA (c))
1385                 {
1386                   *rx++ = '[';
1387                   *rx++ = TOLOWER (c);
1388                   *rx++ = TOUPPER (c);
1389                   *rx++ = ']';
1390                 }
1391               else
1392                 *rx++ = c;
1393               break;
1394             }
1395         }
1396       else
1397         {
1398           /* Replace non-syntax fields with globs.  */
1399           *rx++ = '.';
1400           *rx++ = '*';
1401         }
1402     }
1403
1404   /* Trailing whitespace ok.  */
1405   * rx++ = '[';
1406   * rx++ = ' ';
1407   * rx++ = '\t';
1408   * rx++ = ']';
1409   * rx++ = '*';
1410
1411   /* But anchor it after that.  */
1412   * rx++ = '$';
1413   * rx = '\0';
1414
1415   CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
1416   reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
1417
1418   if (reg_err == 0)
1419     return NULL;
1420   else
1421     {
1422       static char msg[80];
1423
1424       regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
1425       regfree ((regex_t *) CGEN_INSN_RX (insn));
1426       free (CGEN_INSN_RX (insn));
1427       (CGEN_INSN_RX (insn)) = NULL;
1428       return msg;
1429     }
1430 }
1431
1432 \f
1433 /* Default insn parser.
1434
1435    The syntax string is scanned and operands are parsed and stored in FIELDS.
1436    Relocs are queued as we go via other callbacks.
1437
1438    ??? Note that this is currently an all-or-nothing parser.  If we fail to
1439    parse the instruction, we return 0 and the caller will start over from
1440    the beginning.  Backtracking will be necessary in parsing subexpressions,
1441    but that can be handled there.  Not handling backtracking here may get
1442    expensive in the case of the m68k.  Deal with later.
1443
1444    Returns NULL for success, an error message for failure.  */
1445
1446 static const char *
1447 parse_insn_normal (CGEN_CPU_DESC cd,
1448                    const CGEN_INSN *insn,
1449                    const char **strp,
1450                    CGEN_FIELDS *fields)
1451 {
1452   /* ??? Runtime added insns not handled yet.  */
1453   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
1454   const char *str = *strp;
1455   const char *errmsg;
1456   const char *p;
1457   const CGEN_SYNTAX_CHAR_TYPE * syn;
1458 #ifdef CGEN_MNEMONIC_OPERANDS
1459   /* FIXME: wip */
1460   int past_opcode_p;
1461 #endif
1462
1463   /* For now we assume the mnemonic is first (there are no leading operands).
1464      We can parse it without needing to set up operand parsing.
1465      GAS's input scrubber will ensure mnemonics are lowercase, but we may
1466      not be called from GAS.  */
1467   p = CGEN_INSN_MNEMONIC (insn);
1468   while (*p && TOLOWER (*p) == TOLOWER (*str))
1469     ++p, ++str;
1470
1471   if (* p)
1472     return _("unrecognized instruction");
1473
1474 #ifndef CGEN_MNEMONIC_OPERANDS
1475   if (* str && ! ISSPACE (* str))
1476     return _("unrecognized instruction");
1477 #endif
1478
1479   CGEN_INIT_PARSE (cd);
1480   cgen_init_parse_operand (cd);
1481 #ifdef CGEN_MNEMONIC_OPERANDS
1482   past_opcode_p = 0;
1483 #endif
1484
1485   /* We don't check for (*str != '\0') here because we want to parse
1486      any trailing fake arguments in the syntax string.  */
1487   syn = CGEN_SYNTAX_STRING (syntax);
1488
1489   /* Mnemonics come first for now, ensure valid string.  */
1490   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
1491     abort ();
1492
1493   ++syn;
1494
1495   while (* syn != 0)
1496     {
1497       /* Non operand chars must match exactly.  */
1498       if (CGEN_SYNTAX_CHAR_P (* syn))
1499         {
1500           /* FIXME: While we allow for non-GAS callers above, we assume the
1501              first char after the mnemonic part is a space.  */
1502           /* FIXME: We also take inappropriate advantage of the fact that
1503              GAS's input scrubber will remove extraneous blanks.  */
1504           if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
1505             {
1506 #ifdef CGEN_MNEMONIC_OPERANDS
1507               if (CGEN_SYNTAX_CHAR(* syn) == ' ')
1508                 past_opcode_p = 1;
1509 #endif
1510               ++ syn;
1511               ++ str;
1512             }
1513           else if (*str)
1514             {
1515               /* Syntax char didn't match.  Can't be this insn.  */
1516               static char msg [80];
1517
1518               /* xgettext:c-format */
1519               sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
1520                        CGEN_SYNTAX_CHAR(*syn), *str);
1521               return msg;
1522             }
1523           else
1524             {
1525               /* Ran out of input.  */
1526               static char msg [80];
1527
1528               /* xgettext:c-format */
1529               sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
1530                        CGEN_SYNTAX_CHAR(*syn));
1531               return msg;
1532             }
1533           continue;
1534         }
1535
1536       /* We have an operand of some sort.  */
1537       errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
1538                                           &str, fields);
1539       if (errmsg)
1540         return errmsg;
1541
1542       /* Done with this operand, continue with next one.  */
1543       ++ syn;
1544     }
1545
1546   /* If we're at the end of the syntax string, we're done.  */
1547   if (* syn == 0)
1548     {
1549       /* FIXME: For the moment we assume a valid `str' can only contain
1550          blanks now.  IE: We needn't try again with a longer version of
1551          the insn and it is assumed that longer versions of insns appear
1552          before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
1553       while (ISSPACE (* str))
1554         ++ str;
1555
1556       if (* str != '\0')
1557         return _("junk at end of line"); /* FIXME: would like to include `str' */
1558
1559       return NULL;
1560     }
1561
1562   /* We couldn't parse it.  */
1563   return _("unrecognized instruction");
1564 }
1565 \f
1566 /* Main entry point.
1567    This routine is called for each instruction to be assembled.
1568    STR points to the insn to be assembled.
1569    We assume all necessary tables have been initialized.
1570    The assembled instruction, less any fixups, is stored in BUF.
1571    Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
1572    still needs to be converted to target byte order, otherwise BUF is an array
1573    of bytes in target byte order.
1574    The result is a pointer to the insn's entry in the opcode table,
1575    or NULL if an error occured (an error message will have already been
1576    printed).
1577
1578    Note that when processing (non-alias) macro-insns,
1579    this function recurses.
1580
1581    ??? It's possible to make this cpu-independent.
1582    One would have to deal with a few minor things.
1583    At this point in time doing so would be more of a curiosity than useful
1584    [for example this file isn't _that_ big], but keeping the possibility in
1585    mind helps keep the design clean.  */
1586
1587 const CGEN_INSN *
1588 mep_cgen_assemble_insn (CGEN_CPU_DESC cd,
1589                            const char *str,
1590                            CGEN_FIELDS *fields,
1591                            CGEN_INSN_BYTES_PTR buf,
1592                            char **errmsg)
1593 {
1594   const char *start;
1595   CGEN_INSN_LIST *ilist;
1596   const char *parse_errmsg = NULL;
1597   const char *insert_errmsg = NULL;
1598   int recognized_mnemonic = 0;
1599
1600   /* Skip leading white space.  */
1601   while (ISSPACE (* str))
1602     ++ str;
1603
1604   /* The instructions are stored in hashed lists.
1605      Get the first in the list.  */
1606   ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
1607
1608   /* Keep looking until we find a match.  */
1609   start = str;
1610   for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
1611     {
1612       const CGEN_INSN *insn = ilist->insn;
1613       recognized_mnemonic = 1;
1614
1615 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
1616       /* Not usually needed as unsupported opcodes
1617          shouldn't be in the hash lists.  */
1618       /* Is this insn supported by the selected cpu?  */
1619       if (! mep_cgen_insn_supported (cd, insn))
1620         continue;
1621 #endif
1622       /* If the RELAXED attribute is set, this is an insn that shouldn't be
1623          chosen immediately.  Instead, it is used during assembler/linker
1624          relaxation if possible.  */
1625       if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
1626         continue;
1627
1628       str = start;
1629
1630       /* Skip this insn if str doesn't look right lexically.  */
1631       if (CGEN_INSN_RX (insn) != NULL &&
1632           regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
1633         continue;
1634
1635       /* Allow parse/insert handlers to obtain length of insn.  */
1636       CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
1637
1638       parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
1639       if (parse_errmsg != NULL)
1640         continue;
1641
1642       /* ??? 0 is passed for `pc'.  */
1643       insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
1644                                                  (bfd_vma) 0);
1645       if (insert_errmsg != NULL)
1646         continue;
1647
1648       /* It is up to the caller to actually output the insn and any
1649          queued relocs.  */
1650       return insn;
1651     }
1652
1653   {
1654     static char errbuf[150];
1655 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
1656     const char *tmp_errmsg;
1657
1658     /* If requesting verbose error messages, use insert_errmsg.
1659        Failing that, use parse_errmsg.  */
1660     tmp_errmsg = (insert_errmsg ? insert_errmsg :
1661                   parse_errmsg ? parse_errmsg :
1662                   recognized_mnemonic ?
1663                   _("unrecognized form of instruction") :
1664                   _("unrecognized instruction"));
1665
1666     if (strlen (start) > 50)
1667       /* xgettext:c-format */
1668       sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
1669     else
1670       /* xgettext:c-format */
1671       sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
1672 #else
1673     if (strlen (start) > 50)
1674       /* xgettext:c-format */
1675       sprintf (errbuf, _("bad instruction `%.50s...'"), start);
1676     else
1677       /* xgettext:c-format */
1678       sprintf (errbuf, _("bad instruction `%.50s'"), start);
1679 #endif
1680
1681     *errmsg = errbuf;
1682     return NULL;
1683   }
1684 }