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 (C) 1996-2016 Free Software Foundation, Inc.
   8
   9    This file is part of libopcodes.
  10
  11    This library is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3, or (at your option)
  14    any later version.
  15
  16    It is distributed in the hope that it will be useful, but WITHOUT
  17    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  18    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  19    License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software Foundation, Inc.,
  23    51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  24
  25
  26 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
  27    Keep that in mind.  */
  28
  29 #include "sysdep.h"
  30 #include <stdio.h>
  31 #include "ansidecl.h"
  32 #include "bfd.h"
  33 #include "symcat.h"
  34 #include "mep-desc.h"
  35 #include "mep-opc.h"
  36 #include "opintl.h"
  37 #include "xregex.h"
  38 #include "libiberty.h"
  39 #include "safe-ctype.h"
  40
  41 #undef  min
  42 #define min(a,b) ((a) < (b) ? (a) : (b))
  43 #undef  max
  44 #define max(a,b) ((a) > (b) ? (a) : (b))
  45
  46 static const char * parse_insn_normal
  47   (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
  48 \f
  49 /* -- assembler routines inserted here.  */
  50
  51 /* -- asm.c */
  52
  53 #include "elf/mep.h"
  54
  55 #define CGEN_VALIDATE_INSN_SUPPORTED
  56 #define mep_cgen_insn_supported mep_cgen_insn_supported_asm
  57
  58        const char * parse_csrn       (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *);
  59        const char * parse_tpreg      (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *);
  60        const char * parse_spreg      (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *);
  61        const char * parse_mep_align  (CGEN_CPU_DESC, const char **, enum cgen_operand_type, long *);
  62        const char * parse_mep_alignu (CGEN_CPU_DESC, const char **, enum cgen_operand_type, unsigned long *);
  63 static const char * parse_signed16   (CGEN_CPU_DESC, const char **, int, long *);
  64 static const char * parse_signed16_range   (CGEN_CPU_DESC, const char **, int, long *) ATTRIBUTE_UNUSED;
  65 static const char * parse_unsigned16 (CGEN_CPU_DESC, const char **, int, unsigned long *);
  66 static const char * parse_unsigned16_range (CGEN_CPU_DESC, const char **, int, unsigned long *) ATTRIBUTE_UNUSED;
  67 static const char * parse_lo16       (CGEN_CPU_DESC, const char **, int, long *, long);
  68 static const char * parse_unsigned7  (CGEN_CPU_DESC, const char **, enum cgen_operand_type, unsigned long *);
  69 static const char * parse_zero       (CGEN_CPU_DESC, const char **, int, long *);
  70
  71 const char *
  72 parse_csrn (CGEN_CPU_DESC cd, const char **strp,
  73             CGEN_KEYWORD *keyword_table, long *field)
  74 {
  75   const char *err;
  76   unsigned long value;
  77
  78   err = cgen_parse_keyword (cd, strp, keyword_table, field);
  79   if (!err)
  80     return NULL;
  81
  82   err = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CSRN_IDX, & value);
  83   if (err)
  84     return err;
  85   *field = value;
  86   return NULL;
  87 }
  88
  89 /* begin-cop-ip-parse-handlers */
  90 static const char *
  91 parse_ivc2_cr (CGEN_CPU_DESC,
  92         const char **,
  93         CGEN_KEYWORD *,
  94         long *) ATTRIBUTE_UNUSED;
  95 static const char *
  96 parse_ivc2_cr (CGEN_CPU_DESC cd,
  97         const char **strp,
  98         CGEN_KEYWORD *keyword_table  ATTRIBUTE_UNUSED,
  99         long *field)
 100 {
 101   return cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr_ivc2, field);
 102 }
 103 static const char *
 104 parse_ivc2_ccr (CGEN_CPU_DESC,
 105         const char **,
 106         CGEN_KEYWORD *,
 107         long *) ATTRIBUTE_UNUSED;
 108 static const char *
 109 parse_ivc2_ccr (CGEN_CPU_DESC cd,
 110         const char **strp,
 111         CGEN_KEYWORD *keyword_table  ATTRIBUTE_UNUSED,
 112         long *field)
 113 {
 114   return cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_ivc2, field);
 115 }
 116 /* end-cop-ip-parse-handlers */
 117
 118 const char *
 119 parse_tpreg (CGEN_CPU_DESC cd, const char ** strp,
 120              CGEN_KEYWORD *keyword_table, long *field)
 121 {
 122   const char *err;
 123
 124   err = cgen_parse_keyword (cd, strp, keyword_table, field);
 125   if (err)
 126     return err;
 127   if (*field != 13)
 128     return _("Only $tp or $13 allowed for this opcode");
 129   return NULL;
 130 }
 131
 132 const char *
 133 parse_spreg (CGEN_CPU_DESC cd, const char ** strp,
 134              CGEN_KEYWORD *keyword_table, long *field)
 135 {
 136   const char *err;
 137
 138   err = cgen_parse_keyword (cd, strp, keyword_table, field);
 139   if (err)
 140     return err;
 141   if (*field != 15)
 142     return _("Only $sp or $15 allowed for this opcode");
 143   return NULL;
 144 }
 145
 146 const char *
 147 parse_mep_align (CGEN_CPU_DESC cd, const char ** strp,
 148                  enum cgen_operand_type type, long *field)
 149 {
 150   long lsbs = 0;
 151   const char *err;
 152
 153   switch (type)
 154     {
 155     case MEP_OPERAND_PCREL8A2:
 156     case MEP_OPERAND_PCREL12A2:
 157     case MEP_OPERAND_PCREL17A2:
 158     case MEP_OPERAND_PCREL24A2:
 159       err = cgen_parse_signed_integer   (cd, strp, type, field);
 160       break;
 161     case MEP_OPERAND_PCABS24A2:
 162     case MEP_OPERAND_UDISP7:
 163     case MEP_OPERAND_UDISP7A2:
 164     case MEP_OPERAND_UDISP7A4:
 165     case MEP_OPERAND_UIMM7A4:
 166     case MEP_OPERAND_ADDR24A4:
 167       err = cgen_parse_unsigned_integer (cd, strp, type, (unsigned long *) field);
 168       break;
 169     default:
 170       abort();
 171     }
 172   if (err)
 173     return err;
 174   switch (type)
 175     {
 176     case MEP_OPERAND_UDISP7:
 177       lsbs = 0;
 178       break;
 179     case MEP_OPERAND_PCREL8A2:
 180     case MEP_OPERAND_PCREL12A2:
 181     case MEP_OPERAND_PCREL17A2:
 182     case MEP_OPERAND_PCREL24A2:
 183     case MEP_OPERAND_PCABS24A2:
 184     case MEP_OPERAND_UDISP7A2:
 185       lsbs = *field & 1;
 186       break;
 187     case MEP_OPERAND_UDISP7A4:
 188     case MEP_OPERAND_UIMM7A4:
 189     case MEP_OPERAND_ADDR24A4:
 190       lsbs = *field & 3;
 191       break;
 192       lsbs = *field & 7;
 193       break;
 194     default:
 195       /* Safe assumption?  */
 196       abort ();
 197     }
 198   if (lsbs)
 199     return "Value is not aligned enough";
 200   return NULL;
 201 }
 202
 203 const char *
 204 parse_mep_alignu (CGEN_CPU_DESC cd, const char ** strp,
 205                  enum cgen_operand_type type, unsigned long *field)
 206 {
 207   return parse_mep_align (cd, strp, type, (long *) field);
 208 }
 209
 210
 211 /* Handle %lo(), %tpoff(), %sdaoff(), %hi(), and other signed
 212    constants in a signed context.  */
 213
 214 static const char *
 215 parse_signed16 (CGEN_CPU_DESC cd,
 216                 const char **strp,
 217                 int opindex,
 218                 long *valuep)
 219 {
 220   return parse_lo16 (cd, strp, opindex, valuep, 1);
 221 }
 222
 223 static const char *
 224 parse_lo16 (CGEN_CPU_DESC cd,
 225             const char **strp,
 226             int opindex,
 227             long *valuep,
 228             long signedp)
 229 {
 230   const char *errmsg;
 231   enum cgen_parse_operand_result result_type;
 232   bfd_vma value;
 233
 234   if (strncasecmp (*strp, "%lo(", 4) == 0)
 235     {
 236       *strp += 4;
 237       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_LOW16,
 238                                    & result_type, & value);
 239       if (**strp != ')')
 240         return _("missing `)'");
 241       ++*strp;
 242       if (errmsg == NULL
 243           && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
 244         value &= 0xffff;
 245       if (signedp)
 246         *valuep = (long)(short) value;
 247       else
 248         *valuep = value;
 249       return errmsg;
 250     }
 251
 252   if (strncasecmp (*strp, "%hi(", 4) == 0)
 253     {
 254       *strp += 4;
 255       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16S,
 256                                    & result_type, & value);
 257       if (**strp != ')')
 258         return _("missing `)'");
 259       ++*strp;
 260       if (errmsg == NULL
 261           && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
 262         value = (value + 0x8000) >> 16;
 263       *valuep = value;
 264       return errmsg;
 265     }
 266
 267   if (strncasecmp (*strp, "%uhi(", 5) == 0)
 268     {
 269       *strp += 5;
 270       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16U,
 271                                    & result_type, & value);
 272       if (**strp != ')')
 273         return _("missing `)'");
 274       ++*strp;
 275       if (errmsg == NULL
 276           && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
 277         value = value >> 16;
 278       *valuep = value;
 279       return errmsg;
 280     }
 281
 282   if (strncasecmp (*strp, "%sdaoff(", 8) == 0)
 283     {
 284       *strp += 8;
 285       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_GPREL,
 286                                    NULL, & value);
 287       if (**strp != ')')
 288         return _("missing `)'");
 289       ++*strp;
 290       *valuep = value;
 291       return errmsg;
 292     }
 293
 294   if (strncasecmp (*strp, "%tpoff(", 7) == 0)
 295     {
 296       *strp += 7;
 297       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_TPREL,
 298                                    NULL, & value);
 299       if (**strp != ')')
 300         return _("missing `)'");
 301       ++*strp;
 302       *valuep = value;
 303       return errmsg;
 304     }
 305
 306   if (**strp == '%')
 307     return _("invalid %function() here");
 308
 309   return cgen_parse_signed_integer (cd, strp, opindex, valuep);
 310 }
 311
 312 static const char *
 313 parse_unsigned16 (CGEN_CPU_DESC cd,
 314                   const char **strp,
 315                   int opindex,
 316                   unsigned long *valuep)
 317 {
 318   return parse_lo16 (cd, strp, opindex, (long *) valuep, 0);
 319 }
 320
 321 static const char *
 322 parse_signed16_range (CGEN_CPU_DESC cd,
 323                       const char **strp,
 324                       int opindex,
 325                       signed long *valuep)
 326 {
 327   const char *errmsg = 0;
 328   signed long value;
 329
 330   errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
 331   if (errmsg)
 332     return errmsg;
 333
 334   if (value < -32768 || value > 32767)
 335     return _("Immediate is out of range -32768 to 32767");
 336
 337   *valuep = value;
 338   return 0;
 339 }
 340
 341 static const char *
 342 parse_unsigned16_range (CGEN_CPU_DESC cd,
 343                         const char **strp,
 344                         int opindex,
 345                         unsigned long *valuep)
 346 {
 347   const char *errmsg = 0;
 348   unsigned long value;
 349
 350   errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, & value);
 351   if (errmsg)
 352     return errmsg;
 353
 354   if (value > 65535)
 355     return _("Immediate is out of range 0 to 65535");
 356
 357   *valuep = value;
 358   return 0;
 359 }
 360
 361 /* A special case of parse_signed16 which accepts only the value zero.  */
 362
 363 static const char *
 364 parse_zero (CGEN_CPU_DESC cd, const char **strp, int opindex, long *valuep)
 365 {
 366   const char *errmsg;
 367   enum cgen_parse_operand_result result_type;
 368   bfd_vma value;
 369
 370   /*fprintf(stderr, "dj: signed parse opindex `%s'\n", *strp);*/
 371
 372   /* Prevent ($ry) from being attempted as an expression on 'sw $rx,($ry)'.
 373      It will fail and cause ry to be listed as an undefined symbol in the
 374      listing.  */
 375   if (strncmp (*strp, "($", 2) == 0)
 376     return "not zero"; /* any string will do -- will never be seen.  */
 377
 378   if (strncasecmp (*strp, "%lo(", 4) == 0)
 379     {
 380       *strp += 4;
 381       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_LOW16,
 382                                    &result_type, &value);
 383       if (**strp != ')')
 384         return "missing `)'";
 385       ++*strp;
 386       if (errmsg == NULL
 387           && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0))
 388         return "not zero"; /* any string will do -- will never be seen.  */
 389       *valuep = value;
 390       return errmsg;
 391     }
 392
 393   if (strncasecmp (*strp, "%hi(", 4) == 0)
 394     {
 395       *strp += 4;
 396       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16S,
 397                                    &result_type, &value);
 398       if (**strp != ')')
 399         return "missing `)'";
 400       ++*strp;
 401       if (errmsg == NULL
 402           && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0))
 403         return "not zero"; /* any string will do -- will never be seen.  */
 404       *valuep = value;
 405       return errmsg;
 406     }
 407
 408   if (strncasecmp (*strp, "%uhi(", 5) == 0)
 409     {
 410       *strp += 5;
 411       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16U,
 412                                    &result_type, &value);
 413       if (**strp != ')')
 414         return "missing `)'";
 415       ++*strp;
 416       if (errmsg == NULL
 417           && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0))
 418         return "not zero"; /* any string will do -- will never be seen.  */
 419       *valuep = value;
 420       return errmsg;
 421     }
 422
 423   if (strncasecmp (*strp, "%sdaoff(", 8) == 0)
 424     {
 425       *strp += 8;
 426       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_GPREL,
 427                                    &result_type, &value);
 428       if (**strp != ')')
 429         return "missing `)'";
 430       ++*strp;
 431       if (errmsg == NULL
 432           && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0))
 433         return "not zero"; /* any string will do -- will never be seen.  */
 434       *valuep = value;
 435       return errmsg;
 436     }
 437
 438   if (strncasecmp (*strp, "%tpoff(", 7) == 0)
 439     {
 440       *strp += 7;
 441       errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_TPREL,
 442                                    &result_type, &value);
 443       if (**strp != ')')
 444         return "missing `)'";
 445       ++*strp;
 446       if (errmsg == NULL
 447           && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0))
 448         return "not zero"; /* any string will do -- will never be seen.  */
 449       *valuep = value;
 450       return errmsg;
 451     }
 452
 453   if (**strp == '%')
 454     return "invalid %function() here";
 455
 456   errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_NONE,
 457                                &result_type, &value);
 458   if (errmsg == NULL
 459       && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0))
 460     return "not zero"; /* any string will do -- will never be seen.  */
 461
 462   return errmsg;
 463 }
 464
 465 static const char *
 466 parse_unsigned7 (CGEN_CPU_DESC cd, const char **strp,
 467                  enum cgen_operand_type opindex, unsigned long *valuep)
 468 {
 469   const char *errmsg;
 470   bfd_vma value;
 471
 472   /* fprintf(stderr, "dj: unsigned7 parse `%s'\n", *strp); */
 473
 474   if (strncasecmp (*strp, "%tpoff(", 7) == 0)
 475     {
 476       int reloc;
 477       *strp += 7;
 478       switch (opindex)
 479         {
 480         case MEP_OPERAND_UDISP7:
 481           reloc = BFD_RELOC_MEP_TPREL7;
 482           break;
 483         case MEP_OPERAND_UDISP7A2:
 484           reloc = BFD_RELOC_MEP_TPREL7A2;
 485           break;
 486         case MEP_OPERAND_UDISP7A4:
 487           reloc = BFD_RELOC_MEP_TPREL7A4;
 488           break;
 489         default:
 490           /* Safe assumption?  */
 491           abort ();
 492         }
 493       errmsg = cgen_parse_address (cd, strp, opindex, reloc,
 494                                    NULL, &value);
 495       if (**strp != ')')
 496         return "missing `)'";
 497       ++*strp;
 498       *valuep = value;
 499       return errmsg;
 500     }
 501
 502   if (**strp == '%')
 503     return _("invalid %function() here");
 504
 505   return parse_mep_alignu (cd, strp, opindex, valuep);
 506 }
 507
 508 static ATTRIBUTE_UNUSED const char *
 509 parse_cdisp10 (CGEN_CPU_DESC cd,
 510                const char **strp,
 511                int opindex,
 512                long *valuep)
 513 {
 514   const char *errmsg = 0;
 515   signed long value;
 516   long have_zero = 0;
 517   int wide = 0;
 518   int alignment;
 519
 520   switch (opindex)
 521     {
 522     case MEP_OPERAND_CDISP10A4:
 523       alignment = 2;
 524       break;
 525     case MEP_OPERAND_CDISP10A2:
 526       alignment = 1;
 527       break;
 528     case MEP_OPERAND_CDISP10:
 529     default:
 530       alignment = 0;
 531       break;
 532     }
 533
 534   if ((MEP_CPU & EF_MEP_CPU_MASK) == EF_MEP_CPU_C5)
 535     wide = 1;
 536
 537   if (strncmp (*strp, "0x0", 3) == 0
 538       || (**strp == '0' && *(*strp + 1) != 'x'))
 539     have_zero = 1;
 540
 541   errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
 542   if (errmsg)
 543     return errmsg;
 544
 545   if (wide)
 546     {
 547       if (value < -512 || value > 511)
 548         return _("Immediate is out of range -512 to 511");
 549     }
 550   else
 551     {
 552       if (value < -128 || value > 127)
 553         return _("Immediate is out of range -128 to 127");
 554     }
 555
 556   if (value & ((1<<alignment)-1))
 557     return _("Value is not aligned enough");
 558
 559   /* If this field may require a relocation then use larger dsp16.  */
 560   if (! have_zero && value == 0)
 561     return (wide ? _("Immediate is out of range -512 to 511")
 562             : _("Immediate is out of range -128 to 127"));
 563
 564   *valuep = value;
 565   return 0;
 566 }
 567
 568 /* BEGIN LIGHTWEIGHT MACRO PROCESSOR.  */
 569
 570 #define MAXARGS 9
 571
 572 typedef struct
 573 {
 574   char *name;
 575   char *expansion;
 576 }  macro;
 577
 578 typedef struct
 579 {
 580   const char *start;
 581   int len;
 582 } arg;
 583
 584 macro macros[] =
 585 {
 586   { "sizeof", "(`1.end + (- `1))"},
 587   { "startof", "(`1 | 0)" },
 588   { "align4", "(`1&(~3))"},
 589 /*{ "hi", "(((`1+0x8000)>>16) & 0xffff)" },  */
 590 /*{ "lo", "(`1 & 0xffff)" },  */
 591 /*{ "sdaoff", "((`1-__sdabase) & 0x7f)"},  */
 592 /*{ "tpoff", "((`1-__tpbase) & 0x7f)"},  */
 593   { 0,0 }
 594 };
 595
 596 static char  * expand_string    (const char *, int);
 597
 598 static const char *
 599 mep_cgen_expand_macros_and_parse_operand
 600   (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
 601
 602 static char *
 603 str_append (char *dest, const char *input, int len)
 604 {
 605   char *new_dest;
 606   int oldlen;
 607
 608   if (len == 0)
 609     return dest;
 610   /* printf("str_append: <<%s>>, <<%s>>, %d\n", dest, input, len); */
 611   oldlen = (dest ? strlen(dest) : 0);
 612   new_dest = realloc (dest, oldlen + len + 1);
 613   memset (new_dest + oldlen, 0, len + 1);
 614   return strncat (new_dest, input, len);
 615 }
 616
 617 static macro *
 618 lookup_macro (const char *name)
 619 {
 620   macro *m;
 621
 622   for (m = macros; m->name; ++m)
 623     if (strncmp (m->name, name, strlen(m->name)) == 0)
 624       return m;
 625
 626   return 0;
 627 }
 628
 629 static char *
 630 expand_macro (arg *args, int narg, macro *mac)
 631 {
 632   char *result = 0, *rescanned_result = 0;
 633   char *e = mac->expansion;
 634   char *mark = e;
 635   int mac_arg = 0;
 636
 637   /*  printf("expanding macro %s with %d args\n", mac->name, narg + 1); */
 638   while (*e)
 639     {
 640       if (*e == '`' &&
 641           (*e+1) &&
 642           ((*(e + 1) - '1') <= MAXARGS) &&
 643           ((*(e + 1) - '1') <= narg))
 644         {
 645           result = str_append (result, mark, e - mark);
 646           mac_arg = (*(e + 1) - '1');
 647           /* printf("replacing `%d with %s\n", mac_arg+1, args[mac_arg].start); */
 648           result = str_append (result, args[mac_arg].start, args[mac_arg].len);
 649           ++e;
 650           mark = e+1;
 651         }
 652       ++e;
 653     }
 654
 655   if (mark != e)
 656     result = str_append (result, mark, e - mark);
 657
 658   if (result)
 659     {
 660       rescanned_result = expand_string (result, 0);
 661       free (result);
 662       return rescanned_result;
 663     }
 664   else
 665     return result;
 666 }
 667
 668 #define IN_TEXT 0
 669 #define IN_ARGS 1
 670
 671 static char *
 672 expand_string (const char *in, int first_only)
 673 {
 674   int num_expansions = 0;
 675   int depth = 0;
 676   int narg = -1;
 677   arg args[MAXARGS];
 678   int state = IN_TEXT;
 679   const char *mark = in;
 680   macro *pmacro = NULL;
 681   char *expansion = 0;
 682   char *result = 0;
 683
 684   while (*in)
 685     {
 686       switch (state)
 687         {
 688         case IN_TEXT:
 689           if (*in == '%' && *(in + 1) && (!first_only || num_expansions == 0))
 690             {
 691               pmacro = lookup_macro (in + 1);
 692               if (pmacro)
 693                 {
 694                   /* printf("entering state %d at '%s'...\n", state, in); */
 695                   result = str_append (result, mark, in - mark);
 696                   mark = in;
 697                   in += 1 + strlen (pmacro->name);
 698                   while (*in == ' ') ++in;
 699                   if (*in != '(')
 700                     {
 701                       state = IN_TEXT;
 702                       pmacro = NULL;
 703                     }
 704                   else
 705                     {
 706                       state = IN_ARGS;
 707                       narg = 0;
 708                       args[narg].start = in + 1;
 709                       args[narg].len = 0;
 710                       mark = in + 1;
 711                     }
 712                 }
 713             }
 714           break;
 715         case IN_ARGS:
 716           if (depth == 0)
 717             {
 718               switch (*in)
 719                 {
 720                 case ',':
 721                   narg++;
 722                   args[narg].start = (in + 1);
 723                   args[narg].len = 0;
 724                   break;
 725                 case ')':
 726                   state = IN_TEXT;
 727                   /* printf("entering state %d at '%s'...\n", state, in); */
 728                   if (pmacro)
 729                     {
 730                       expansion = 0;
 731                       expansion = expand_macro (args, narg, pmacro);
 732                       num_expansions++;
 733                       if (expansion)
 734                         {
 735                           result = str_append (result, expansion, strlen (expansion));
 736                           free (expansion);
 737                         }
 738                     }
 739                   else
 740                     {
 741                       result = str_append (result, mark, in - mark);
 742                     }
 743                   pmacro = NULL;
 744                   mark = in + 1;
 745                   break;
 746                 case '(':
 747                   depth++;
 748                   /* Fall through.  */
 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 #ifdef CGEN_MNEMONIC_OPERANDS
1537       (void) past_opcode_p;
1538 #endif
1539       /* We have an operand of some sort.  */
1540       errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
1541       if (errmsg)
1542         return errmsg;
1543
1544       /* Done with this operand, continue with next one.  */
1545       ++ syn;
1546     }
1547
1548   /* If we're at the end of the syntax string, we're done.  */
1549   if (* syn == 0)
1550     {
1551       /* FIXME: For the moment we assume a valid `str' can only contain
1552          blanks now.  IE: We needn't try again with a longer version of
1553          the insn and it is assumed that longer versions of insns appear
1554          before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
1555       while (ISSPACE (* str))
1556         ++ str;
1557
1558       if (* str != '\0')
1559         return _("junk at end of line"); /* FIXME: would like to include `str' */
1560
1561       return NULL;
1562     }
1563
1564   /* We couldn't parse it.  */
1565   return _("unrecognized instruction");
1566 }
1567 \f
1568 /* Main entry point.
1569    This routine is called for each instruction to be assembled.
1570    STR points to the insn to be assembled.
1571    We assume all necessary tables have been initialized.
1572    The assembled instruction, less any fixups, is stored in BUF.
1573    Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
1574    still needs to be converted to target byte order, otherwise BUF is an array
1575    of bytes in target byte order.
1576    The result is a pointer to the insn's entry in the opcode table,
1577    or NULL if an error occured (an error message will have already been
1578    printed).
1579
1580    Note that when processing (non-alias) macro-insns,
1581    this function recurses.
1582
1583    ??? It's possible to make this cpu-independent.
1584    One would have to deal with a few minor things.
1585    At this point in time doing so would be more of a curiosity than useful
1586    [for example this file isn't _that_ big], but keeping the possibility in
1587    mind helps keep the design clean.  */
1588
1589 const CGEN_INSN *
1590 mep_cgen_assemble_insn (CGEN_CPU_DESC cd,
1591                            const char *str,
1592                            CGEN_FIELDS *fields,
1593                            CGEN_INSN_BYTES_PTR buf,
1594                            char **errmsg)
1595 {
1596   const char *start;
1597   CGEN_INSN_LIST *ilist;
1598   const char *parse_errmsg = NULL;
1599   const char *insert_errmsg = NULL;
1600   int recognized_mnemonic = 0;
1601
1602   /* Skip leading white space.  */
1603   while (ISSPACE (* str))
1604     ++ str;
1605
1606   /* The instructions are stored in hashed lists.
1607      Get the first in the list.  */
1608   ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
1609
1610   /* Keep looking until we find a match.  */
1611   start = str;
1612   for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
1613     {
1614       const CGEN_INSN *insn = ilist->insn;
1615       recognized_mnemonic = 1;
1616
1617 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
1618       /* Not usually needed as unsupported opcodes
1619          shouldn't be in the hash lists.  */
1620       /* Is this insn supported by the selected cpu?  */
1621       if (! mep_cgen_insn_supported (cd, insn))
1622         continue;
1623 #endif
1624       /* If the RELAXED attribute is set, this is an insn that shouldn't be
1625          chosen immediately.  Instead, it is used during assembler/linker
1626          relaxation if possible.  */
1627       if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
1628         continue;
1629
1630       str = start;
1631
1632       /* Skip this insn if str doesn't look right lexically.  */
1633       if (CGEN_INSN_RX (insn) != NULL &&
1634           regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
1635         continue;
1636
1637       /* Allow parse/insert handlers to obtain length of insn.  */
1638       CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
1639
1640       parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
1641       if (parse_errmsg != NULL)
1642         continue;
1643
1644       /* ??? 0 is passed for `pc'.  */
1645       insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
1646                                                  (bfd_vma) 0);
1647       if (insert_errmsg != NULL)
1648         continue;
1649
1650       /* It is up to the caller to actually output the insn and any
1651          queued relocs.  */
1652       return insn;
1653     }
1654
1655   {
1656     static char errbuf[150];
1657     const char *tmp_errmsg;
1658 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
1659 #define be_verbose 1
1660 #else
1661 #define be_verbose 0
1662 #endif
1663
1664     if (be_verbose)
1665       {
1666         /* If requesting verbose error messages, use insert_errmsg.
1667            Failing that, use parse_errmsg.  */
1668         tmp_errmsg = (insert_errmsg ? insert_errmsg :
1669                       parse_errmsg ? parse_errmsg :
1670                       recognized_mnemonic ?
1671                       _("unrecognized form of instruction") :
1672                       _("unrecognized instruction"));
1673
1674         if (strlen (start) > 50)
1675           /* xgettext:c-format */
1676           sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
1677         else
1678           /* xgettext:c-format */
1679           sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
1680       }
1681     else
1682       {
1683         if (strlen (start) > 50)
1684           /* xgettext:c-format */
1685           sprintf (errbuf, _("bad instruction `%.50s...'"), start);
1686         else
1687           /* xgettext:c-format */
1688           sprintf (errbuf, _("bad instruction `%.50s'"), start);
1689       }
1690
1691     *errmsg = errbuf;
1692     return NULL;
1693   }
1694 }