opcodes/mt-asm.c

   1 /* DO NOT EDIT!  -*- buffer-read-only: t -*- vi:set ro:  */
   2 /* Assembler interface for targets using CGEN. -*- C -*-
   3    CGEN: Cpu tools GENerator
   4
   5    THIS FILE IS MACHINE GENERATED WITH CGEN.
   6    - the resultant file is machine generated, cgen-asm.in isn't
   7
   8    Copyright (C) 1996-2019 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       opcodes_error_handler
 596         (_("internal error: unrecognized field %d while parsing"),
 597          opindex);
 598       abort ();
 599   }
 600
 601   return errmsg;
 602 }
 603
 604 cgen_parse_fn * const mt_cgen_parse_handlers[] =
 605 {
 606   parse_insn_normal,
 607 };
 608
 609 void
 610 mt_cgen_init_asm (CGEN_CPU_DESC cd)
 611 {
 612   mt_cgen_init_opcode_table (cd);
 613   mt_cgen_init_ibld_table (cd);
 614   cd->parse_handlers = & mt_cgen_parse_handlers[0];
 615   cd->parse_operand = mt_cgen_parse_operand;
 616 #ifdef CGEN_ASM_INIT_HOOK
 617 CGEN_ASM_INIT_HOOK
 618 #endif
 619 }
 620
 621 \f
 622
 623 /* Regex construction routine.
 624
 625    This translates an opcode syntax string into a regex string,
 626    by replacing any non-character syntax element (such as an
 627    opcode) with the pattern '.*'
 628
 629    It then compiles the regex and stores it in the opcode, for
 630    later use by mt_cgen_assemble_insn
 631
 632    Returns NULL for success, an error message for failure.  */
 633
 634 char *
 635 mt_cgen_build_insn_regex (CGEN_INSN *insn)
 636 {
 637   CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
 638   const char *mnem = CGEN_INSN_MNEMONIC (insn);
 639   char rxbuf[CGEN_MAX_RX_ELEMENTS];
 640   char *rx = rxbuf;
 641   const CGEN_SYNTAX_CHAR_TYPE *syn;
 642   int reg_err;
 643
 644   syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
 645
 646   /* Mnemonics come first in the syntax string.  */
 647   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
 648     return _("missing mnemonic in syntax string");
 649   ++syn;
 650
 651   /* Generate a case sensitive regular expression that emulates case
 652      insensitive matching in the "C" locale.  We cannot generate a case
 653      insensitive regular expression because in Turkish locales, 'i' and 'I'
 654      are not equal modulo case conversion.  */
 655
 656   /* Copy the literal mnemonic out of the insn.  */
 657   for (; *mnem; mnem++)
 658     {
 659       char c = *mnem;
 660
 661       if (ISALPHA (c))
 662         {
 663           *rx++ = '[';
 664           *rx++ = TOLOWER (c);
 665           *rx++ = TOUPPER (c);
 666           *rx++ = ']';
 667         }
 668       else
 669         *rx++ = c;
 670     }
 671
 672   /* Copy any remaining literals from the syntax string into the rx.  */
 673   for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
 674     {
 675       if (CGEN_SYNTAX_CHAR_P (* syn))
 676         {
 677           char c = CGEN_SYNTAX_CHAR (* syn);
 678
 679           switch (c)
 680             {
 681               /* Escape any regex metacharacters in the syntax.  */
 682             case '.': case '[': case '\\':
 683             case '*': case '^': case '$':
 684
 685 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
 686             case '?': case '{': case '}':
 687             case '(': case ')': case '*':
 688             case '|': case '+': case ']':
 689 #endif
 690               *rx++ = '\\';
 691               *rx++ = c;
 692               break;
 693
 694             default:
 695               if (ISALPHA (c))
 696                 {
 697                   *rx++ = '[';
 698                   *rx++ = TOLOWER (c);
 699                   *rx++ = TOUPPER (c);
 700                   *rx++ = ']';
 701                 }
 702               else
 703                 *rx++ = c;
 704               break;
 705             }
 706         }
 707       else
 708         {
 709           /* Replace non-syntax fields with globs.  */
 710           *rx++ = '.';
 711           *rx++ = '*';
 712         }
 713     }
 714
 715   /* Trailing whitespace ok.  */
 716   * rx++ = '[';
 717   * rx++ = ' ';
 718   * rx++ = '\t';
 719   * rx++ = ']';
 720   * rx++ = '*';
 721
 722   /* But anchor it after that.  */
 723   * rx++ = '$';
 724   * rx = '\0';
 725
 726   CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
 727   reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
 728
 729   if (reg_err == 0)
 730     return NULL;
 731   else
 732     {
 733       static char msg[80];
 734
 735       regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
 736       regfree ((regex_t *) CGEN_INSN_RX (insn));
 737       free (CGEN_INSN_RX (insn));
 738       (CGEN_INSN_RX (insn)) = NULL;
 739       return msg;
 740     }
 741 }
 742
 743 \f
 744 /* Default insn parser.
 745
 746    The syntax string is scanned and operands are parsed and stored in FIELDS.
 747    Relocs are queued as we go via other callbacks.
 748
 749    ??? Note that this is currently an all-or-nothing parser.  If we fail to
 750    parse the instruction, we return 0 and the caller will start over from
 751    the beginning.  Backtracking will be necessary in parsing subexpressions,
 752    but that can be handled there.  Not handling backtracking here may get
 753    expensive in the case of the m68k.  Deal with later.
 754
 755    Returns NULL for success, an error message for failure.  */
 756
 757 static const char *
 758 parse_insn_normal (CGEN_CPU_DESC cd,
 759                    const CGEN_INSN *insn,
 760                    const char **strp,
 761                    CGEN_FIELDS *fields)
 762 {
 763   /* ??? Runtime added insns not handled yet.  */
 764   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 765   const char *str = *strp;
 766   const char *errmsg;
 767   const char *p;
 768   const CGEN_SYNTAX_CHAR_TYPE * syn;
 769 #ifdef CGEN_MNEMONIC_OPERANDS
 770   /* FIXME: wip */
 771   int past_opcode_p;
 772 #endif
 773
 774   /* For now we assume the mnemonic is first (there are no leading operands).
 775      We can parse it without needing to set up operand parsing.
 776      GAS's input scrubber will ensure mnemonics are lowercase, but we may
 777      not be called from GAS.  */
 778   p = CGEN_INSN_MNEMONIC (insn);
 779   while (*p && TOLOWER (*p) == TOLOWER (*str))
 780     ++p, ++str;
 781
 782   if (* p)
 783     return _("unrecognized instruction");
 784
 785 #ifndef CGEN_MNEMONIC_OPERANDS
 786   if (* str && ! ISSPACE (* str))
 787     return _("unrecognized instruction");
 788 #endif
 789
 790   CGEN_INIT_PARSE (cd);
 791   cgen_init_parse_operand (cd);
 792 #ifdef CGEN_MNEMONIC_OPERANDS
 793   past_opcode_p = 0;
 794 #endif
 795
 796   /* We don't check for (*str != '\0') here because we want to parse
 797      any trailing fake arguments in the syntax string.  */
 798   syn = CGEN_SYNTAX_STRING (syntax);
 799
 800   /* Mnemonics come first for now, ensure valid string.  */
 801   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
 802     abort ();
 803
 804   ++syn;
 805
 806   while (* syn != 0)
 807     {
 808       /* Non operand chars must match exactly.  */
 809       if (CGEN_SYNTAX_CHAR_P (* syn))
 810         {
 811           /* FIXME: While we allow for non-GAS callers above, we assume the
 812              first char after the mnemonic part is a space.  */
 813           /* FIXME: We also take inappropriate advantage of the fact that
 814              GAS's input scrubber will remove extraneous blanks.  */
 815           if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
 816             {
 817 #ifdef CGEN_MNEMONIC_OPERANDS
 818               if (CGEN_SYNTAX_CHAR(* syn) == ' ')
 819                 past_opcode_p = 1;
 820 #endif
 821               ++ syn;
 822               ++ str;
 823             }
 824           else if (*str)
 825             {
 826               /* Syntax char didn't match.  Can't be this insn.  */
 827               static char msg [80];
 828
 829               /* xgettext:c-format */
 830               sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
 831                        CGEN_SYNTAX_CHAR(*syn), *str);
 832               return msg;
 833             }
 834           else
 835             {
 836               /* Ran out of input.  */
 837               static char msg [80];
 838
 839               /* xgettext:c-format */
 840               sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
 841                        CGEN_SYNTAX_CHAR(*syn));
 842               return msg;
 843             }
 844           continue;
 845         }
 846
 847 #ifdef CGEN_MNEMONIC_OPERANDS
 848       (void) past_opcode_p;
 849 #endif
 850       /* We have an operand of some sort.  */
 851       errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
 852       if (errmsg)
 853         return errmsg;
 854
 855       /* Done with this operand, continue with next one.  */
 856       ++ syn;
 857     }
 858
 859   /* If we're at the end of the syntax string, we're done.  */
 860   if (* syn == 0)
 861     {
 862       /* FIXME: For the moment we assume a valid `str' can only contain
 863          blanks now.  IE: We needn't try again with a longer version of
 864          the insn and it is assumed that longer versions of insns appear
 865          before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
 866       while (ISSPACE (* str))
 867         ++ str;
 868
 869       if (* str != '\0')
 870         return _("junk at end of line"); /* FIXME: would like to include `str' */
 871
 872       return NULL;
 873     }
 874
 875   /* We couldn't parse it.  */
 876   return _("unrecognized instruction");
 877 }
 878 \f
 879 /* Main entry point.
 880    This routine is called for each instruction to be assembled.
 881    STR points to the insn to be assembled.
 882    We assume all necessary tables have been initialized.
 883    The assembled instruction, less any fixups, is stored in BUF.
 884    Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
 885    still needs to be converted to target byte order, otherwise BUF is an array
 886    of bytes in target byte order.
 887    The result is a pointer to the insn's entry in the opcode table,
 888    or NULL if an error occured (an error message will have already been
 889    printed).
 890
 891    Note that when processing (non-alias) macro-insns,
 892    this function recurses.
 893
 894    ??? It's possible to make this cpu-independent.
 895    One would have to deal with a few minor things.
 896    At this point in time doing so would be more of a curiosity than useful
 897    [for example this file isn't _that_ big], but keeping the possibility in
 898    mind helps keep the design clean.  */
 899
 900 const CGEN_INSN *
 901 mt_cgen_assemble_insn (CGEN_CPU_DESC cd,
 902                            const char *str,
 903                            CGEN_FIELDS *fields,
 904                            CGEN_INSN_BYTES_PTR buf,
 905                            char **errmsg)
 906 {
 907   const char *start;
 908   CGEN_INSN_LIST *ilist;
 909   const char *parse_errmsg = NULL;
 910   const char *insert_errmsg = NULL;
 911   int recognized_mnemonic = 0;
 912
 913   /* Skip leading white space.  */
 914   while (ISSPACE (* str))
 915     ++ str;
 916
 917   /* The instructions are stored in hashed lists.
 918      Get the first in the list.  */
 919   ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
 920
 921   /* Keep looking until we find a match.  */
 922   start = str;
 923   for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
 924     {
 925       const CGEN_INSN *insn = ilist->insn;
 926       recognized_mnemonic = 1;
 927
 928 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
 929       /* Not usually needed as unsupported opcodes
 930          shouldn't be in the hash lists.  */
 931       /* Is this insn supported by the selected cpu?  */
 932       if (! mt_cgen_insn_supported (cd, insn))
 933         continue;
 934 #endif
 935       /* If the RELAXED attribute is set, this is an insn that shouldn't be
 936          chosen immediately.  Instead, it is used during assembler/linker
 937          relaxation if possible.  */
 938       if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
 939         continue;
 940
 941       str = start;
 942
 943       /* Skip this insn if str doesn't look right lexically.  */
 944       if (CGEN_INSN_RX (insn) != NULL &&
 945           regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
 946         continue;
 947
 948       /* Allow parse/insert handlers to obtain length of insn.  */
 949       CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
 950
 951       parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
 952       if (parse_errmsg != NULL)
 953         continue;
 954
 955       /* ??? 0 is passed for `pc'.  */
 956       insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
 957                                                  (bfd_vma) 0);
 958       if (insert_errmsg != NULL)
 959         continue;
 960
 961       /* It is up to the caller to actually output the insn and any
 962          queued relocs.  */
 963       return insn;
 964     }
 965
 966   {
 967     static char errbuf[150];
 968     const char *tmp_errmsg;
 969 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
 970 #define be_verbose 1
 971 #else
 972 #define be_verbose 0
 973 #endif
 974
 975     if (be_verbose)
 976       {
 977         /* If requesting verbose error messages, use insert_errmsg.
 978            Failing that, use parse_errmsg.  */
 979         tmp_errmsg = (insert_errmsg ? insert_errmsg :
 980                       parse_errmsg ? parse_errmsg :
 981                       recognized_mnemonic ?
 982                       _("unrecognized form of instruction") :
 983                       _("unrecognized instruction"));
 984
 985         if (strlen (start) > 50)
 986           /* xgettext:c-format */
 987           sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
 988         else
 989           /* xgettext:c-format */
 990           sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
 991       }
 992     else
 993       {
 994         if (strlen (start) > 50)
 995           /* xgettext:c-format */
 996           sprintf (errbuf, _("bad instruction `%.50s...'"), start);
 997         else
 998           /* xgettext:c-format */
 999           sprintf (errbuf, _("bad instruction `%.50s'"), start);
1000       }
1001
1002     *errmsg = errbuf;
1003     return NULL;
1004   }
1005 }