opcodes/mt-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 "mt-desc.h"
  36 #include "mt-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 /* Range checking for signed numbers.  Returns 0 if acceptable
  54    and 1 if the value is out of bounds for a signed quantity.  */
  55
  56 static int
  57 signed_out_of_bounds (long val)
  58 {
  59   if ((val < -32768) || (val > 32767))
  60     return 1;
  61   return 0;
  62 }
  63
  64 static const char *
  65 parse_loopsize (CGEN_CPU_DESC cd,
  66                 const char **strp,
  67                 int opindex,
  68                 void *arg)
  69 {
  70   signed long * valuep = (signed long *) arg;
  71   const char *errmsg;
  72   bfd_reloc_code_real_type code = BFD_RELOC_NONE;
  73   enum cgen_parse_operand_result result_type;
  74   bfd_vma value;
  75
  76   /* Is it a control transfer instructions?  */
  77   if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_LOOPSIZE)
  78     {
  79       code = BFD_RELOC_MT_PCINSN8;
  80       errmsg = cgen_parse_address (cd, strp, opindex, code,
  81                                    & result_type, & value);
  82       *valuep = value;
  83       return errmsg;
  84     }
  85
  86   abort ();
  87 }
  88
  89 static const char *
  90 parse_imm16 (CGEN_CPU_DESC cd,
  91              const char **strp,
  92              int opindex,
  93              void *arg)
  94 {
  95   signed long * valuep = (signed long *) arg;
  96   const char *errmsg;
  97   enum cgen_parse_operand_result result_type;
  98   bfd_reloc_code_real_type code = BFD_RELOC_NONE;
  99   bfd_vma value;
 100
 101   /* Is it a control transfer instructions?  */
 102   if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_IMM16O)
 103     {
 104       code = BFD_RELOC_16_PCREL;
 105       errmsg = cgen_parse_address (cd, strp, opindex, code,
 106                                    & result_type, & value);
 107       if (errmsg == NULL)
 108         {
 109           if (signed_out_of_bounds (value))
 110             errmsg = _("Operand out of range. Must be between -32768 and 32767.");
 111         }
 112       *valuep = value;
 113       return errmsg;
 114     }
 115
 116   /* If it's not a control transfer instruction, then
 117      we have to check for %OP relocating operators.  */
 118   if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_IMM16L)
 119     ;
 120   else if (strncmp (*strp, "%hi16", 5) == 0)
 121     {
 122       *strp += 5;
 123       code = BFD_RELOC_HI16;
 124     }
 125   else if (strncmp (*strp, "%lo16", 5) == 0)
 126     {
 127       *strp += 5;
 128       code = BFD_RELOC_LO16;
 129     }
 130
 131   /* If we found a %OP relocating operator, then parse it as an address.
 132      If not, we need to parse it as an integer, either signed or unsigned
 133      depending on which operand type we have.  */
 134   if (code != BFD_RELOC_NONE)
 135     {
 136        /* %OP relocating operator found.  */
 137        errmsg = cgen_parse_address (cd, strp, opindex, code,
 138                                    & result_type, & value);
 139        if (errmsg == NULL)
 140          {
 141            switch (result_type)
 142              {
 143              case (CGEN_PARSE_OPERAND_RESULT_NUMBER):
 144                if (code == BFD_RELOC_HI16)
 145                  value = (value >> 16) & 0xFFFF;
 146                else if (code == BFD_RELOC_LO16)
 147                  value = value  & 0xFFFF;
 148                else
 149                  errmsg = _("Biiiig Trouble in parse_imm16!");
 150                break;
 151
 152              case (CGEN_PARSE_OPERAND_RESULT_QUEUED):
 153                /* No special processing for this case.  */
 154                break;
 155
 156              default:
 157                errmsg = _("The percent-operator's operand is not a symbol");
 158                break;
 159              }
 160          }
 161        *valuep = value;
 162     }
 163   else
 164     {
 165       /* Parse hex values like 0xffff as unsigned, and sign extend
 166          them manually.  */
 167       int parse_signed = (opindex == (CGEN_OPERAND_TYPE)MT_OPERAND_IMM16);
 168
 169       if ((*strp)[0] == '0'
 170           && ((*strp)[1] == 'x' || (*strp)[1] == 'X'))
 171         parse_signed = 0;
 172
 173       /* No relocating operator.  Parse as an number.  */
 174       if (parse_signed)
 175         {
 176           /* Parse as as signed integer.  */
 177
 178           errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
 179
 180           if (errmsg == NULL)
 181             {
 182 #if 0
 183               /* Manual range checking is needed for the signed case.  */
 184               if (*valuep & 0x8000)
 185                 value = 0xffff0000 | *valuep;
 186               else
 187                 value = *valuep;
 188
 189               if (signed_out_of_bounds (value))
 190                 errmsg = _("Operand out of range. Must be between -32768 and 32767.");
 191               /* Truncate to 16 bits. This is necessary
 192                  because cgen will have sign extended *valuep.  */
 193               *valuep &= 0xFFFF;
 194 #endif
 195             }
 196         }
 197       else
 198         {
 199           /* MT_OPERAND_IMM16Z.  Parse as an unsigned integer.  */
 200           errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, (unsigned long *) valuep);
 201
 202           if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_IMM16
 203               && *valuep >= 0x8000
 204               && *valuep <= 0xffff)
 205             *valuep -= 0x10000;
 206         }
 207     }
 208
 209   return errmsg;
 210 }
 211
 212
 213 static const char *
 214 parse_dup (CGEN_CPU_DESC cd,
 215            const char **strp,
 216            int opindex,
 217            unsigned long *valuep)
 218 {
 219   const char *errmsg = NULL;
 220
 221   if (strncmp (*strp, "dup", 3) == 0 || strncmp (*strp, "DUP", 3) == 0)
 222     {
 223       *strp += 3;
 224       *valuep = 1;
 225     }
 226   else if (strncmp (*strp, "xx", 2) == 0 || strncmp (*strp, "XX", 2) == 0)
 227     {
 228       *strp += 2;
 229       *valuep = 0;
 230     }
 231   else
 232     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 233
 234   return errmsg;
 235 }
 236
 237
 238 static const char *
 239 parse_ball (CGEN_CPU_DESC cd,
 240             const char **strp,
 241             int opindex,
 242             unsigned long *valuep)
 243 {
 244   const char *errmsg = NULL;
 245
 246   if (strncmp (*strp, "all", 3) == 0 || strncmp (*strp, "ALL", 3) == 0)
 247     {
 248       *strp += 3;
 249       *valuep = 1;
 250     }
 251   else if (strncmp (*strp, "one", 3) == 0 || strncmp (*strp, "ONE", 3) == 0)
 252     {
 253       *strp += 3;
 254       *valuep = 0;
 255     }
 256   else
 257     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 258
 259   return errmsg;
 260 }
 261
 262 static const char *
 263 parse_xmode (CGEN_CPU_DESC cd,
 264              const char **strp,
 265              int opindex,
 266              unsigned long *valuep)
 267 {
 268   const char *errmsg = NULL;
 269
 270   if (strncmp (*strp, "pm", 2) == 0 || strncmp (*strp, "PM", 2) == 0)
 271     {
 272       *strp += 2;
 273       *valuep = 1;
 274     }
 275   else if (strncmp (*strp, "xm", 2) == 0 || strncmp (*strp, "XM", 2) == 0)
 276     {
 277       *strp += 2;
 278       *valuep = 0;
 279     }
 280   else
 281     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 282
 283   return errmsg;
 284 }
 285
 286 static const char *
 287 parse_rc (CGEN_CPU_DESC cd,
 288           const char **strp,
 289           int opindex,
 290           unsigned long *valuep)
 291 {
 292   const char *errmsg = NULL;
 293
 294   if (strncmp (*strp, "r", 1) == 0 || strncmp (*strp, "R", 1) == 0)
 295     {
 296       *strp += 1;
 297       *valuep = 1;
 298     }
 299   else if (strncmp (*strp, "c", 1) == 0 || strncmp (*strp, "C", 1) == 0)
 300     {
 301       *strp += 1;
 302       *valuep = 0;
 303     }
 304   else
 305     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 306
 307   return errmsg;
 308 }
 309
 310 static const char *
 311 parse_cbrb (CGEN_CPU_DESC cd,
 312             const char **strp,
 313             int opindex,
 314             unsigned long *valuep)
 315 {
 316   const char *errmsg = NULL;
 317
 318   if (strncmp (*strp, "rb", 2) == 0 || strncmp (*strp, "RB", 2) == 0)
 319     {
 320       *strp += 2;
 321       *valuep = 1;
 322     }
 323   else if (strncmp (*strp, "cb", 2) == 0 || strncmp (*strp, "CB", 2) == 0)
 324     {
 325       *strp += 2;
 326       *valuep = 0;
 327     }
 328   else
 329     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 330
 331   return errmsg;
 332 }
 333
 334 static const char *
 335 parse_rbbc (CGEN_CPU_DESC cd,
 336             const char **strp,
 337             int opindex,
 338             unsigned long *valuep)
 339 {
 340   const char *errmsg = NULL;
 341
 342   if (strncmp (*strp, "rt", 2) == 0 || strncmp (*strp, "RT", 2) == 0)
 343     {
 344       *strp += 2;
 345       *valuep = 0;
 346     }
 347   else if (strncmp (*strp, "br1", 3) == 0 || strncmp (*strp, "BR1", 3) == 0)
 348     {
 349       *strp += 3;
 350       *valuep = 1;
 351     }
 352   else if (strncmp (*strp, "br2", 3) == 0 || strncmp (*strp, "BR2", 3) == 0)
 353     {
 354       *strp += 3;
 355       *valuep = 2;
 356     }
 357   else if (strncmp (*strp, "cs", 2) == 0 || strncmp (*strp, "CS", 2) == 0)
 358     {
 359       *strp += 2;
 360       *valuep = 3;
 361     }
 362   else
 363     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 364
 365   return errmsg;
 366 }
 367
 368 static const char *
 369 parse_type (CGEN_CPU_DESC cd,
 370             const char **strp,
 371             int opindex,
 372             unsigned long *valuep)
 373 {
 374   const char *errmsg = NULL;
 375
 376   if (strncmp (*strp, "odd", 3) == 0 || strncmp (*strp, "ODD", 3) == 0)
 377     {
 378       *strp += 3;
 379       *valuep = 0;
 380     }
 381   else if (strncmp (*strp, "even", 4) == 0 || strncmp (*strp, "EVEN", 4) == 0)
 382     {
 383       *strp += 4;
 384       *valuep = 1;
 385     }
 386   else if (strncmp (*strp, "oe", 2) == 0 || strncmp (*strp, "OE", 2) == 0)
 387     {
 388       *strp += 2;
 389       *valuep = 2;
 390     }
 391   else
 392     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 393
 394  if ((errmsg == NULL) && (*valuep == 3))
 395     errmsg = _("invalid operand.  type may have values 0,1,2 only.");
 396
 397   return errmsg;
 398 }
 399
 400 /* -- dis.c */
 401
 402 const char * mt_cgen_parse_operand
 403   (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
 404
 405 /* Main entry point for operand parsing.
 406
 407    This function is basically just a big switch statement.  Earlier versions
 408    used tables to look up the function to use, but
 409    - if the table contains both assembler and disassembler functions then
 410      the disassembler contains much of the assembler and vice-versa,
 411    - there's a lot of inlining possibilities as things grow,
 412    - using a switch statement avoids the function call overhead.
 413
 414    This function could be moved into `parse_insn_normal', but keeping it
 415    separate makes clear the interface between `parse_insn_normal' and each of
 416    the handlers.  */
 417
 418 const char *
 419 mt_cgen_parse_operand (CGEN_CPU_DESC cd,
 420                            int opindex,
 421                            const char ** strp,
 422                            CGEN_FIELDS * fields)
 423 {
 424   const char * errmsg = NULL;
 425   /* Used by scalar operands that still need to be parsed.  */
 426   long junk ATTRIBUTE_UNUSED;
 427
 428   switch (opindex)
 429     {
 430     case MT_OPERAND_A23 :
 431       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_A23, (unsigned long *) (& fields->f_a23));
 432       break;
 433     case MT_OPERAND_BALL :
 434       errmsg = parse_ball (cd, strp, MT_OPERAND_BALL, (unsigned long *) (& fields->f_ball));
 435       break;
 436     case MT_OPERAND_BALL2 :
 437       errmsg = parse_ball (cd, strp, MT_OPERAND_BALL2, (unsigned long *) (& fields->f_ball2));
 438       break;
 439     case MT_OPERAND_BANKADDR :
 440       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_BANKADDR, (unsigned long *) (& fields->f_bankaddr));
 441       break;
 442     case MT_OPERAND_BRC :
 443       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_BRC, (unsigned long *) (& fields->f_brc));
 444       break;
 445     case MT_OPERAND_BRC2 :
 446       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_BRC2, (unsigned long *) (& fields->f_brc2));
 447       break;
 448     case MT_OPERAND_CB1INCR :
 449       errmsg = cgen_parse_signed_integer (cd, strp, MT_OPERAND_CB1INCR, (long *) (& fields->f_cb1incr));
 450       break;
 451     case MT_OPERAND_CB1SEL :
 452       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CB1SEL, (unsigned long *) (& fields->f_cb1sel));
 453       break;
 454     case MT_OPERAND_CB2INCR :
 455       errmsg = cgen_parse_signed_integer (cd, strp, MT_OPERAND_CB2INCR, (long *) (& fields->f_cb2incr));
 456       break;
 457     case MT_OPERAND_CB2SEL :
 458       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CB2SEL, (unsigned long *) (& fields->f_cb2sel));
 459       break;
 460     case MT_OPERAND_CBRB :
 461       errmsg = parse_cbrb (cd, strp, MT_OPERAND_CBRB, (unsigned long *) (& fields->f_cbrb));
 462       break;
 463     case MT_OPERAND_CBS :
 464       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CBS, (unsigned long *) (& fields->f_cbs));
 465       break;
 466     case MT_OPERAND_CBX :
 467       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CBX, (unsigned long *) (& fields->f_cbx));
 468       break;
 469     case MT_OPERAND_CCB :
 470       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CCB, (unsigned long *) (& fields->f_ccb));
 471       break;
 472     case MT_OPERAND_CDB :
 473       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CDB, (unsigned long *) (& fields->f_cdb));
 474       break;
 475     case MT_OPERAND_CELL :
 476       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CELL, (unsigned long *) (& fields->f_cell));
 477       break;
 478     case MT_OPERAND_COLNUM :
 479       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_COLNUM, (unsigned long *) (& fields->f_colnum));
 480       break;
 481     case MT_OPERAND_CONTNUM :
 482       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CONTNUM, (unsigned long *) (& fields->f_contnum));
 483       break;
 484     case MT_OPERAND_CR :
 485       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CR, (unsigned long *) (& fields->f_cr));
 486       break;
 487     case MT_OPERAND_CTXDISP :
 488       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CTXDISP, (unsigned long *) (& fields->f_ctxdisp));
 489       break;
 490     case MT_OPERAND_DUP :
 491       errmsg = parse_dup (cd, strp, MT_OPERAND_DUP, (unsigned long *) (& fields->f_dup));
 492       break;
 493     case MT_OPERAND_FBDISP :
 494       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_FBDISP, (unsigned long *) (& fields->f_fbdisp));
 495       break;
 496     case MT_OPERAND_FBINCR :
 497       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_FBINCR, (unsigned long *) (& fields->f_fbincr));
 498       break;
 499     case MT_OPERAND_FRDR :
 500       errmsg = cgen_parse_keyword (cd, strp, & mt_cgen_opval_h_spr, & fields->f_dr);
 501       break;
 502     case MT_OPERAND_FRDRRR :
 503       errmsg = cgen_parse_keyword (cd, strp, & mt_cgen_opval_h_spr, & fields->f_drrr);
 504       break;
 505     case MT_OPERAND_FRSR1 :
 506       errmsg = cgen_parse_keyword (cd, strp, & mt_cgen_opval_h_spr, & fields->f_sr1);
 507       break;
 508     case MT_OPERAND_FRSR2 :
 509       errmsg = cgen_parse_keyword (cd, strp, & mt_cgen_opval_h_spr, & fields->f_sr2);
 510       break;
 511     case MT_OPERAND_ID :
 512       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_ID, (unsigned long *) (& fields->f_id));
 513       break;
 514     case MT_OPERAND_IMM16 :
 515       errmsg = parse_imm16 (cd, strp, MT_OPERAND_IMM16, (long *) (& fields->f_imm16s));
 516       break;
 517     case MT_OPERAND_IMM16L :
 518       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_IMM16L, (unsigned long *) (& fields->f_imm16l));
 519       break;
 520     case MT_OPERAND_IMM16O :
 521       errmsg = parse_imm16 (cd, strp, MT_OPERAND_IMM16O, (unsigned long *) (& fields->f_imm16s));
 522       break;
 523     case MT_OPERAND_IMM16Z :
 524       errmsg = parse_imm16 (cd, strp, MT_OPERAND_IMM16Z, (unsigned long *) (& fields->f_imm16u));
 525       break;
 526     case MT_OPERAND_INCAMT :
 527       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_INCAMT, (unsigned long *) (& fields->f_incamt));
 528       break;
 529     case MT_OPERAND_INCR :
 530       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_INCR, (unsigned long *) (& fields->f_incr));
 531       break;
 532     case MT_OPERAND_LENGTH :
 533       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_LENGTH, (unsigned long *) (& fields->f_length));
 534       break;
 535     case MT_OPERAND_LOOPSIZE :
 536       errmsg = parse_loopsize (cd, strp, MT_OPERAND_LOOPSIZE, (unsigned long *) (& fields->f_loopo));
 537       break;
 538     case MT_OPERAND_MASK :
 539       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_MASK, (unsigned long *) (& fields->f_mask));
 540       break;
 541     case MT_OPERAND_MASK1 :
 542       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_MASK1, (unsigned long *) (& fields->f_mask1));
 543       break;
 544     case MT_OPERAND_MODE :
 545       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_MODE, (unsigned long *) (& fields->f_mode));
 546       break;
 547     case MT_OPERAND_PERM :
 548       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_PERM, (unsigned long *) (& fields->f_perm));
 549       break;
 550     case MT_OPERAND_RBBC :
 551       errmsg = parse_rbbc (cd, strp, MT_OPERAND_RBBC, (unsigned long *) (& fields->f_rbbc));
 552       break;
 553     case MT_OPERAND_RC :
 554       errmsg = parse_rc (cd, strp, MT_OPERAND_RC, (unsigned long *) (& fields->f_rc));
 555       break;
 556     case MT_OPERAND_RC1 :
 557       errmsg = parse_rc (cd, strp, MT_OPERAND_RC1, (unsigned long *) (& fields->f_rc1));
 558       break;
 559     case MT_OPERAND_RC2 :
 560       errmsg = parse_rc (cd, strp, MT_OPERAND_RC2, (unsigned long *) (& fields->f_rc2));
 561       break;
 562     case MT_OPERAND_RC3 :
 563       errmsg = parse_rc (cd, strp, MT_OPERAND_RC3, (unsigned long *) (& fields->f_rc3));
 564       break;
 565     case MT_OPERAND_RCNUM :
 566       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_RCNUM, (unsigned long *) (& fields->f_rcnum));
 567       break;
 568     case MT_OPERAND_RDA :
 569       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_RDA, (unsigned long *) (& fields->f_rda));
 570       break;
 571     case MT_OPERAND_ROWNUM :
 572       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_ROWNUM, (unsigned long *) (& fields->f_rownum));
 573       break;
 574     case MT_OPERAND_ROWNUM1 :
 575       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_ROWNUM1, (unsigned long *) (& fields->f_rownum1));
 576       break;
 577     case MT_OPERAND_ROWNUM2 :
 578       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_ROWNUM2, (unsigned long *) (& fields->f_rownum2));
 579       break;
 580     case MT_OPERAND_SIZE :
 581       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_SIZE, (unsigned long *) (& fields->f_size));
 582       break;
 583     case MT_OPERAND_TYPE :
 584       errmsg = parse_type (cd, strp, MT_OPERAND_TYPE, (unsigned long *) (& fields->f_type));
 585       break;
 586     case MT_OPERAND_WR :
 587       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_WR, (unsigned long *) (& fields->f_wr));
 588       break;
 589     case MT_OPERAND_XMODE :
 590       errmsg = parse_xmode (cd, strp, MT_OPERAND_XMODE, (unsigned long *) (& fields->f_xmode));
 591       break;
 592
 593     default :
 594       /* xgettext:c-format */
 595       fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
 596       abort ();
 597   }
 598
 599   return errmsg;
 600 }
 601
 602 cgen_parse_fn * const mt_cgen_parse_handlers[] =
 603 {
 604   parse_insn_normal,
 605 };
 606
 607 void
 608 mt_cgen_init_asm (CGEN_CPU_DESC cd)
 609 {
 610   mt_cgen_init_opcode_table (cd);
 611   mt_cgen_init_ibld_table (cd);
 612   cd->parse_handlers = & mt_cgen_parse_handlers[0];
 613   cd->parse_operand = mt_cgen_parse_operand;
 614 #ifdef CGEN_ASM_INIT_HOOK
 615 CGEN_ASM_INIT_HOOK
 616 #endif
 617 }
 618
 619 \f
 620
 621 /* Regex construction routine.
 622
 623    This translates an opcode syntax string into a regex string,
 624    by replacing any non-character syntax element (such as an
 625    opcode) with the pattern '.*'
 626
 627    It then compiles the regex and stores it in the opcode, for
 628    later use by mt_cgen_assemble_insn
 629
 630    Returns NULL for success, an error message for failure.  */
 631
 632 char *
 633 mt_cgen_build_insn_regex (CGEN_INSN *insn)
 634 {
 635   CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
 636   const char *mnem = CGEN_INSN_MNEMONIC (insn);
 637   char rxbuf[CGEN_MAX_RX_ELEMENTS];
 638   char *rx = rxbuf;
 639   const CGEN_SYNTAX_CHAR_TYPE *syn;
 640   int reg_err;
 641
 642   syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
 643
 644   /* Mnemonics come first in the syntax string.  */
 645   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
 646     return _("missing mnemonic in syntax string");
 647   ++syn;
 648
 649   /* Generate a case sensitive regular expression that emulates case
 650      insensitive matching in the "C" locale.  We cannot generate a case
 651      insensitive regular expression because in Turkish locales, 'i' and 'I'
 652      are not equal modulo case conversion.  */
 653
 654   /* Copy the literal mnemonic out of the insn.  */
 655   for (; *mnem; mnem++)
 656     {
 657       char c = *mnem;
 658
 659       if (ISALPHA (c))
 660         {
 661           *rx++ = '[';
 662           *rx++ = TOLOWER (c);
 663           *rx++ = TOUPPER (c);
 664           *rx++ = ']';
 665         }
 666       else
 667         *rx++ = c;
 668     }
 669
 670   /* Copy any remaining literals from the syntax string into the rx.  */
 671   for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
 672     {
 673       if (CGEN_SYNTAX_CHAR_P (* syn))
 674         {
 675           char c = CGEN_SYNTAX_CHAR (* syn);
 676
 677           switch (c)
 678             {
 679               /* Escape any regex metacharacters in the syntax.  */
 680             case '.': case '[': case '\\':
 681             case '*': case '^': case '$':
 682
 683 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
 684             case '?': case '{': case '}':
 685             case '(': case ')': case '*':
 686             case '|': case '+': case ']':
 687 #endif
 688               *rx++ = '\\';
 689               *rx++ = c;
 690               break;
 691
 692             default:
 693               if (ISALPHA (c))
 694                 {
 695                   *rx++ = '[';
 696                   *rx++ = TOLOWER (c);
 697                   *rx++ = TOUPPER (c);
 698                   *rx++ = ']';
 699                 }
 700               else
 701                 *rx++ = c;
 702               break;
 703             }
 704         }
 705       else
 706         {
 707           /* Replace non-syntax fields with globs.  */
 708           *rx++ = '.';
 709           *rx++ = '*';
 710         }
 711     }
 712
 713   /* Trailing whitespace ok.  */
 714   * rx++ = '[';
 715   * rx++ = ' ';
 716   * rx++ = '\t';
 717   * rx++ = ']';
 718   * rx++ = '*';
 719
 720   /* But anchor it after that.  */
 721   * rx++ = '$';
 722   * rx = '\0';
 723
 724   CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
 725   reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
 726
 727   if (reg_err == 0)
 728     return NULL;
 729   else
 730     {
 731       static char msg[80];
 732
 733       regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
 734       regfree ((regex_t *) CGEN_INSN_RX (insn));
 735       free (CGEN_INSN_RX (insn));
 736       (CGEN_INSN_RX (insn)) = NULL;
 737       return msg;
 738     }
 739 }
 740
 741 \f
 742 /* Default insn parser.
 743
 744    The syntax string is scanned and operands are parsed and stored in FIELDS.
 745    Relocs are queued as we go via other callbacks.
 746
 747    ??? Note that this is currently an all-or-nothing parser.  If we fail to
 748    parse the instruction, we return 0 and the caller will start over from
 749    the beginning.  Backtracking will be necessary in parsing subexpressions,
 750    but that can be handled there.  Not handling backtracking here may get
 751    expensive in the case of the m68k.  Deal with later.
 752
 753    Returns NULL for success, an error message for failure.  */
 754
 755 static const char *
 756 parse_insn_normal (CGEN_CPU_DESC cd,
 757                    const CGEN_INSN *insn,
 758                    const char **strp,
 759                    CGEN_FIELDS *fields)
 760 {
 761   /* ??? Runtime added insns not handled yet.  */
 762   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 763   const char *str = *strp;
 764   const char *errmsg;
 765   const char *p;
 766   const CGEN_SYNTAX_CHAR_TYPE * syn;
 767 #ifdef CGEN_MNEMONIC_OPERANDS
 768   /* FIXME: wip */
 769   int past_opcode_p;
 770 #endif
 771
 772   /* For now we assume the mnemonic is first (there are no leading operands).
 773      We can parse it without needing to set up operand parsing.
 774      GAS's input scrubber will ensure mnemonics are lowercase, but we may
 775      not be called from GAS.  */
 776   p = CGEN_INSN_MNEMONIC (insn);
 777   while (*p && TOLOWER (*p) == TOLOWER (*str))
 778     ++p, ++str;
 779
 780   if (* p)
 781     return _("unrecognized instruction");
 782
 783 #ifndef CGEN_MNEMONIC_OPERANDS
 784   if (* str && ! ISSPACE (* str))
 785     return _("unrecognized instruction");
 786 #endif
 787
 788   CGEN_INIT_PARSE (cd);
 789   cgen_init_parse_operand (cd);
 790 #ifdef CGEN_MNEMONIC_OPERANDS
 791   past_opcode_p = 0;
 792 #endif
 793
 794   /* We don't check for (*str != '\0') here because we want to parse
 795      any trailing fake arguments in the syntax string.  */
 796   syn = CGEN_SYNTAX_STRING (syntax);
 797
 798   /* Mnemonics come first for now, ensure valid string.  */
 799   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
 800     abort ();
 801
 802   ++syn;
 803
 804   while (* syn != 0)
 805     {
 806       /* Non operand chars must match exactly.  */
 807       if (CGEN_SYNTAX_CHAR_P (* syn))
 808         {
 809           /* FIXME: While we allow for non-GAS callers above, we assume the
 810              first char after the mnemonic part is a space.  */
 811           /* FIXME: We also take inappropriate advantage of the fact that
 812              GAS's input scrubber will remove extraneous blanks.  */
 813           if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
 814             {
 815 #ifdef CGEN_MNEMONIC_OPERANDS
 816               if (CGEN_SYNTAX_CHAR(* syn) == ' ')
 817                 past_opcode_p = 1;
 818 #endif
 819               ++ syn;
 820               ++ str;
 821             }
 822           else if (*str)
 823             {
 824               /* Syntax char didn't match.  Can't be this insn.  */
 825               static char msg [80];
 826
 827               /* xgettext:c-format */
 828               sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
 829                        CGEN_SYNTAX_CHAR(*syn), *str);
 830               return msg;
 831             }
 832           else
 833             {
 834               /* Ran out of input.  */
 835               static char msg [80];
 836
 837               /* xgettext:c-format */
 838               sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
 839                        CGEN_SYNTAX_CHAR(*syn));
 840               return msg;
 841             }
 842           continue;
 843         }
 844
 845       /* We have an operand of some sort.  */
 846       errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
 847                                           &str, fields);
 848       if (errmsg)
 849         return errmsg;
 850
 851       /* Done with this operand, continue with next one.  */
 852       ++ syn;
 853     }
 854
 855   /* If we're at the end of the syntax string, we're done.  */
 856   if (* syn == 0)
 857     {
 858       /* FIXME: For the moment we assume a valid `str' can only contain
 859          blanks now.  IE: We needn't try again with a longer version of
 860          the insn and it is assumed that longer versions of insns appear
 861          before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
 862       while (ISSPACE (* str))
 863         ++ str;
 864
 865       if (* str != '\0')
 866         return _("junk at end of line"); /* FIXME: would like to include `str' */
 867
 868       return NULL;
 869     }
 870
 871   /* We couldn't parse it.  */
 872   return _("unrecognized instruction");
 873 }
 874 \f
 875 /* Main entry point.
 876    This routine is called for each instruction to be assembled.
 877    STR points to the insn to be assembled.
 878    We assume all necessary tables have been initialized.
 879    The assembled instruction, less any fixups, is stored in BUF.
 880    Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
 881    still needs to be converted to target byte order, otherwise BUF is an array
 882    of bytes in target byte order.
 883    The result is a pointer to the insn's entry in the opcode table,
 884    or NULL if an error occured (an error message will have already been
 885    printed).
 886
 887    Note that when processing (non-alias) macro-insns,
 888    this function recurses.
 889
 890    ??? It's possible to make this cpu-independent.
 891    One would have to deal with a few minor things.
 892    At this point in time doing so would be more of a curiosity than useful
 893    [for example this file isn't _that_ big], but keeping the possibility in
 894    mind helps keep the design clean.  */
 895
 896 const CGEN_INSN *
 897 mt_cgen_assemble_insn (CGEN_CPU_DESC cd,
 898                            const char *str,
 899                            CGEN_FIELDS *fields,
 900                            CGEN_INSN_BYTES_PTR buf,
 901                            char **errmsg)
 902 {
 903   const char *start;
 904   CGEN_INSN_LIST *ilist;
 905   const char *parse_errmsg = NULL;
 906   const char *insert_errmsg = NULL;
 907   int recognized_mnemonic = 0;
 908
 909   /* Skip leading white space.  */
 910   while (ISSPACE (* str))
 911     ++ str;
 912
 913   /* The instructions are stored in hashed lists.
 914      Get the first in the list.  */
 915   ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
 916
 917   /* Keep looking until we find a match.  */
 918   start = str;
 919   for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
 920     {
 921       const CGEN_INSN *insn = ilist->insn;
 922       recognized_mnemonic = 1;
 923
 924 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
 925       /* Not usually needed as unsupported opcodes
 926          shouldn't be in the hash lists.  */
 927       /* Is this insn supported by the selected cpu?  */
 928       if (! mt_cgen_insn_supported (cd, insn))
 929         continue;
 930 #endif
 931       /* If the RELAXED attribute is set, this is an insn that shouldn't be
 932          chosen immediately.  Instead, it is used during assembler/linker
 933          relaxation if possible.  */
 934       if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
 935         continue;
 936
 937       str = start;
 938
 939       /* Skip this insn if str doesn't look right lexically.  */
 940       if (CGEN_INSN_RX (insn) != NULL &&
 941           regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
 942         continue;
 943
 944       /* Allow parse/insert handlers to obtain length of insn.  */
 945       CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
 946
 947       parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
 948       if (parse_errmsg != NULL)
 949         continue;
 950
 951       /* ??? 0 is passed for `pc'.  */
 952       insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
 953                                                  (bfd_vma) 0);
 954       if (insert_errmsg != NULL)
 955         continue;
 956
 957       /* It is up to the caller to actually output the insn and any
 958          queued relocs.  */
 959       return insn;
 960     }
 961
 962   {
 963     static char errbuf[150];
 964 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
 965     const char *tmp_errmsg;
 966
 967     /* If requesting verbose error messages, use insert_errmsg.
 968        Failing that, use parse_errmsg.  */
 969     tmp_errmsg = (insert_errmsg ? insert_errmsg :
 970                   parse_errmsg ? parse_errmsg :
 971                   recognized_mnemonic ?
 972                   _("unrecognized form of instruction") :
 973                   _("unrecognized instruction"));
 974
 975     if (strlen (start) > 50)
 976       /* xgettext:c-format */
 977       sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
 978     else
 979       /* xgettext:c-format */
 980       sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
 981 #else
 982     if (strlen (start) > 50)
 983       /* xgettext:c-format */
 984       sprintf (errbuf, _("bad instruction `%.50s...'"), start);
 985     else
 986       /* xgettext:c-format */
 987       sprintf (errbuf, _("bad instruction `%.50s'"), start);
 988 #endif
 989
 990     *errmsg = errbuf;
 991     return NULL;
 992   }
 993 }