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 (C) 1996-2014 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 "mt-desc.h"
  35 #include "mt-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 /* Range checking for signed numbers.  Returns 0 if acceptable
  53    and 1 if the value is out of bounds for a signed quantity.  */
  54
  55 static int
  56 signed_out_of_bounds (long val)
  57 {
  58   if ((val < -32768) || (val > 32767))
  59     return 1;
  60   return 0;
  61 }
  62
  63 static const char *
  64 parse_loopsize (CGEN_CPU_DESC cd,
  65                 const char **strp,
  66                 int opindex,
  67                 void *arg)
  68 {
  69   signed long * valuep = (signed long *) arg;
  70   const char *errmsg;
  71   bfd_reloc_code_real_type code = BFD_RELOC_NONE;
  72   enum cgen_parse_operand_result result_type;
  73   bfd_vma value;
  74
  75   /* Is it a control transfer instructions?  */
  76   if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_LOOPSIZE)
  77     {
  78       code = BFD_RELOC_MT_PCINSN8;
  79       errmsg = cgen_parse_address (cd, strp, opindex, code,
  80                                    & result_type, & value);
  81       *valuep = value;
  82       return errmsg;
  83     }
  84
  85   abort ();
  86 }
  87
  88 static const char *
  89 parse_imm16 (CGEN_CPU_DESC cd,
  90              const char **strp,
  91              int opindex,
  92              void *arg)
  93 {
  94   signed long * valuep = (signed long *) arg;
  95   const char *errmsg;
  96   enum cgen_parse_operand_result result_type;
  97   bfd_reloc_code_real_type code = BFD_RELOC_NONE;
  98   bfd_vma value;
  99
 100   /* Is it a control transfer instructions?  */
 101   if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_IMM16O)
 102     {
 103       code = BFD_RELOC_16_PCREL;
 104       errmsg = cgen_parse_address (cd, strp, opindex, code,
 105                                    & result_type, & value);
 106       if (errmsg == NULL)
 107         {
 108           if (signed_out_of_bounds (value))
 109             errmsg = _("Operand out of range. Must be between -32768 and 32767.");
 110         }
 111       *valuep = value;
 112       return errmsg;
 113     }
 114
 115   /* If it's not a control transfer instruction, then
 116      we have to check for %OP relocating operators.  */
 117   if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_IMM16L)
 118     ;
 119   else if (strncmp (*strp, "%hi16", 5) == 0)
 120     {
 121       *strp += 5;
 122       code = BFD_RELOC_HI16;
 123     }
 124   else if (strncmp (*strp, "%lo16", 5) == 0)
 125     {
 126       *strp += 5;
 127       code = BFD_RELOC_LO16;
 128     }
 129
 130   /* If we found a %OP relocating operator, then parse it as an address.
 131      If not, we need to parse it as an integer, either signed or unsigned
 132      depending on which operand type we have.  */
 133   if (code != BFD_RELOC_NONE)
 134     {
 135        /* %OP relocating operator found.  */
 136        errmsg = cgen_parse_address (cd, strp, opindex, code,
 137                                    & result_type, & value);
 138        if (errmsg == NULL)
 139          {
 140            switch (result_type)
 141              {
 142              case (CGEN_PARSE_OPERAND_RESULT_NUMBER):
 143                if (code == BFD_RELOC_HI16)
 144                  value = (value >> 16) & 0xFFFF;
 145                else if (code == BFD_RELOC_LO16)
 146                  value = value  & 0xFFFF;
 147                else
 148                  errmsg = _("Biiiig Trouble in parse_imm16!");
 149                break;
 150
 151              case (CGEN_PARSE_OPERAND_RESULT_QUEUED):
 152                /* No special processing for this case.  */
 153                break;
 154
 155              default:
 156                errmsg = _("The percent-operator's operand is not a symbol");
 157                break;
 158              }
 159          }
 160        *valuep = value;
 161     }
 162   else
 163     {
 164       /* Parse hex values like 0xffff as unsigned, and sign extend
 165          them manually.  */
 166       int parse_signed = (opindex == (CGEN_OPERAND_TYPE)MT_OPERAND_IMM16);
 167
 168       if ((*strp)[0] == '0'
 169           && ((*strp)[1] == 'x' || (*strp)[1] == 'X'))
 170         parse_signed = 0;
 171
 172       /* No relocating operator.  Parse as an number.  */
 173       if (parse_signed)
 174         {
 175           /* Parse as as signed integer.  */
 176
 177           errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
 178
 179           if (errmsg == NULL)
 180             {
 181 #if 0
 182               /* Manual range checking is needed for the signed case.  */
 183               if (*valuep & 0x8000)
 184                 value = 0xffff0000 | *valuep;
 185               else
 186                 value = *valuep;
 187
 188               if (signed_out_of_bounds (value))
 189                 errmsg = _("Operand out of range. Must be between -32768 and 32767.");
 190               /* Truncate to 16 bits. This is necessary
 191                  because cgen will have sign extended *valuep.  */
 192               *valuep &= 0xFFFF;
 193 #endif
 194             }
 195         }
 196       else
 197         {
 198           /* MT_OPERAND_IMM16Z.  Parse as an unsigned integer.  */
 199           errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, (unsigned long *) valuep);
 200
 201           if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_IMM16
 202               && *valuep >= 0x8000
 203               && *valuep <= 0xffff)
 204             *valuep -= 0x10000;
 205         }
 206     }
 207
 208   return errmsg;
 209 }
 210
 211
 212 static const char *
 213 parse_dup (CGEN_CPU_DESC cd,
 214            const char **strp,
 215            int opindex,
 216            unsigned long *valuep)
 217 {
 218   const char *errmsg = NULL;
 219
 220   if (strncmp (*strp, "dup", 3) == 0 || strncmp (*strp, "DUP", 3) == 0)
 221     {
 222       *strp += 3;
 223       *valuep = 1;
 224     }
 225   else if (strncmp (*strp, "xx", 2) == 0 || strncmp (*strp, "XX", 2) == 0)
 226     {
 227       *strp += 2;
 228       *valuep = 0;
 229     }
 230   else
 231     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 232
 233   return errmsg;
 234 }
 235
 236
 237 static const char *
 238 parse_ball (CGEN_CPU_DESC cd,
 239             const char **strp,
 240             int opindex,
 241             unsigned long *valuep)
 242 {
 243   const char *errmsg = NULL;
 244
 245   if (strncmp (*strp, "all", 3) == 0 || strncmp (*strp, "ALL", 3) == 0)
 246     {
 247       *strp += 3;
 248       *valuep = 1;
 249     }
 250   else if (strncmp (*strp, "one", 3) == 0 || strncmp (*strp, "ONE", 3) == 0)
 251     {
 252       *strp += 3;
 253       *valuep = 0;
 254     }
 255   else
 256     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 257
 258   return errmsg;
 259 }
 260
 261 static const char *
 262 parse_xmode (CGEN_CPU_DESC cd,
 263              const char **strp,
 264              int opindex,
 265              unsigned long *valuep)
 266 {
 267   const char *errmsg = NULL;
 268
 269   if (strncmp (*strp, "pm", 2) == 0 || strncmp (*strp, "PM", 2) == 0)
 270     {
 271       *strp += 2;
 272       *valuep = 1;
 273     }
 274   else if (strncmp (*strp, "xm", 2) == 0 || strncmp (*strp, "XM", 2) == 0)
 275     {
 276       *strp += 2;
 277       *valuep = 0;
 278     }
 279   else
 280     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 281
 282   return errmsg;
 283 }
 284
 285 static const char *
 286 parse_rc (CGEN_CPU_DESC cd,
 287           const char **strp,
 288           int opindex,
 289           unsigned long *valuep)
 290 {
 291   const char *errmsg = NULL;
 292
 293   if (strncmp (*strp, "r", 1) == 0 || strncmp (*strp, "R", 1) == 0)
 294     {
 295       *strp += 1;
 296       *valuep = 1;
 297     }
 298   else if (strncmp (*strp, "c", 1) == 0 || strncmp (*strp, "C", 1) == 0)
 299     {
 300       *strp += 1;
 301       *valuep = 0;
 302     }
 303   else
 304     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 305
 306   return errmsg;
 307 }
 308
 309 static const char *
 310 parse_cbrb (CGEN_CPU_DESC cd,
 311             const char **strp,
 312             int opindex,
 313             unsigned long *valuep)
 314 {
 315   const char *errmsg = NULL;
 316
 317   if (strncmp (*strp, "rb", 2) == 0 || strncmp (*strp, "RB", 2) == 0)
 318     {
 319       *strp += 2;
 320       *valuep = 1;
 321     }
 322   else if (strncmp (*strp, "cb", 2) == 0 || strncmp (*strp, "CB", 2) == 0)
 323     {
 324       *strp += 2;
 325       *valuep = 0;
 326     }
 327   else
 328     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 329
 330   return errmsg;
 331 }
 332
 333 static const char *
 334 parse_rbbc (CGEN_CPU_DESC cd,
 335             const char **strp,
 336             int opindex,
 337             unsigned long *valuep)
 338 {
 339   const char *errmsg = NULL;
 340
 341   if (strncmp (*strp, "rt", 2) == 0 || strncmp (*strp, "RT", 2) == 0)
 342     {
 343       *strp += 2;
 344       *valuep = 0;
 345     }
 346   else if (strncmp (*strp, "br1", 3) == 0 || strncmp (*strp, "BR1", 3) == 0)
 347     {
 348       *strp += 3;
 349       *valuep = 1;
 350     }
 351   else if (strncmp (*strp, "br2", 3) == 0 || strncmp (*strp, "BR2", 3) == 0)
 352     {
 353       *strp += 3;
 354       *valuep = 2;
 355     }
 356   else if (strncmp (*strp, "cs", 2) == 0 || strncmp (*strp, "CS", 2) == 0)
 357     {
 358       *strp += 2;
 359       *valuep = 3;
 360     }
 361   else
 362     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 363
 364   return errmsg;
 365 }
 366
 367 static const char *
 368 parse_type (CGEN_CPU_DESC cd,
 369             const char **strp,
 370             int opindex,
 371             unsigned long *valuep)
 372 {
 373   const char *errmsg = NULL;
 374
 375   if (strncmp (*strp, "odd", 3) == 0 || strncmp (*strp, "ODD", 3) == 0)
 376     {
 377       *strp += 3;
 378       *valuep = 0;
 379     }
 380   else if (strncmp (*strp, "even", 4) == 0 || strncmp (*strp, "EVEN", 4) == 0)
 381     {
 382       *strp += 4;
 383       *valuep = 1;
 384     }
 385   else if (strncmp (*strp, "oe", 2) == 0 || strncmp (*strp, "OE", 2) == 0)
 386     {
 387       *strp += 2;
 388       *valuep = 2;
 389     }
 390   else
 391     errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
 392
 393  if ((errmsg == NULL) && (*valuep == 3))
 394     errmsg = _("invalid operand.  type may have values 0,1,2 only.");
 395
 396   return errmsg;
 397 }
 398
 399 /* -- dis.c */
 400
 401 const char * mt_cgen_parse_operand
 402   (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
 403
 404 /* Main entry point for operand parsing.
 405
 406    This function is basically just a big switch statement.  Earlier versions
 407    used tables to look up the function to use, but
 408    - if the table contains both assembler and disassembler functions then
 409      the disassembler contains much of the assembler and vice-versa,
 410    - there's a lot of inlining possibilities as things grow,
 411    - using a switch statement avoids the function call overhead.
 412
 413    This function could be moved into `parse_insn_normal', but keeping it
 414    separate makes clear the interface between `parse_insn_normal' and each of
 415    the handlers.  */
 416
 417 const char *
 418 mt_cgen_parse_operand (CGEN_CPU_DESC cd,
 419                            int opindex,
 420                            const char ** strp,
 421                            CGEN_FIELDS * fields)
 422 {
 423   const char * errmsg = NULL;
 424   /* Used by scalar operands that still need to be parsed.  */
 425   long junk ATTRIBUTE_UNUSED;
 426
 427   switch (opindex)
 428     {
 429     case MT_OPERAND_A23 :
 430       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_A23, (unsigned long *) (& fields->f_a23));
 431       break;
 432     case MT_OPERAND_BALL :
 433       errmsg = parse_ball (cd, strp, MT_OPERAND_BALL, (unsigned long *) (& fields->f_ball));
 434       break;
 435     case MT_OPERAND_BALL2 :
 436       errmsg = parse_ball (cd, strp, MT_OPERAND_BALL2, (unsigned long *) (& fields->f_ball2));
 437       break;
 438     case MT_OPERAND_BANKADDR :
 439       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_BANKADDR, (unsigned long *) (& fields->f_bankaddr));
 440       break;
 441     case MT_OPERAND_BRC :
 442       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_BRC, (unsigned long *) (& fields->f_brc));
 443       break;
 444     case MT_OPERAND_BRC2 :
 445       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_BRC2, (unsigned long *) (& fields->f_brc2));
 446       break;
 447     case MT_OPERAND_CB1INCR :
 448       errmsg = cgen_parse_signed_integer (cd, strp, MT_OPERAND_CB1INCR, (long *) (& fields->f_cb1incr));
 449       break;
 450     case MT_OPERAND_CB1SEL :
 451       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CB1SEL, (unsigned long *) (& fields->f_cb1sel));
 452       break;
 453     case MT_OPERAND_CB2INCR :
 454       errmsg = cgen_parse_signed_integer (cd, strp, MT_OPERAND_CB2INCR, (long *) (& fields->f_cb2incr));
 455       break;
 456     case MT_OPERAND_CB2SEL :
 457       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CB2SEL, (unsigned long *) (& fields->f_cb2sel));
 458       break;
 459     case MT_OPERAND_CBRB :
 460       errmsg = parse_cbrb (cd, strp, MT_OPERAND_CBRB, (unsigned long *) (& fields->f_cbrb));
 461       break;
 462     case MT_OPERAND_CBS :
 463       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CBS, (unsigned long *) (& fields->f_cbs));
 464       break;
 465     case MT_OPERAND_CBX :
 466       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CBX, (unsigned long *) (& fields->f_cbx));
 467       break;
 468     case MT_OPERAND_CCB :
 469       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CCB, (unsigned long *) (& fields->f_ccb));
 470       break;
 471     case MT_OPERAND_CDB :
 472       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CDB, (unsigned long *) (& fields->f_cdb));
 473       break;
 474     case MT_OPERAND_CELL :
 475       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CELL, (unsigned long *) (& fields->f_cell));
 476       break;
 477     case MT_OPERAND_COLNUM :
 478       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_COLNUM, (unsigned long *) (& fields->f_colnum));
 479       break;
 480     case MT_OPERAND_CONTNUM :
 481       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CONTNUM, (unsigned long *) (& fields->f_contnum));
 482       break;
 483     case MT_OPERAND_CR :
 484       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CR, (unsigned long *) (& fields->f_cr));
 485       break;
 486     case MT_OPERAND_CTXDISP :
 487       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CTXDISP, (unsigned long *) (& fields->f_ctxdisp));
 488       break;
 489     case MT_OPERAND_DUP :
 490       errmsg = parse_dup (cd, strp, MT_OPERAND_DUP, (unsigned long *) (& fields->f_dup));
 491       break;
 492     case MT_OPERAND_FBDISP :
 493       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_FBDISP, (unsigned long *) (& fields->f_fbdisp));
 494       break;
 495     case MT_OPERAND_FBINCR :
 496       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_FBINCR, (unsigned long *) (& fields->f_fbincr));
 497       break;
 498     case MT_OPERAND_FRDR :
 499       errmsg = cgen_parse_keyword (cd, strp, & mt_cgen_opval_h_spr, & fields->f_dr);
 500       break;
 501     case MT_OPERAND_FRDRRR :
 502       errmsg = cgen_parse_keyword (cd, strp, & mt_cgen_opval_h_spr, & fields->f_drrr);
 503       break;
 504     case MT_OPERAND_FRSR1 :
 505       errmsg = cgen_parse_keyword (cd, strp, & mt_cgen_opval_h_spr, & fields->f_sr1);
 506       break;
 507     case MT_OPERAND_FRSR2 :
 508       errmsg = cgen_parse_keyword (cd, strp, & mt_cgen_opval_h_spr, & fields->f_sr2);
 509       break;
 510     case MT_OPERAND_ID :
 511       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_ID, (unsigned long *) (& fields->f_id));
 512       break;
 513     case MT_OPERAND_IMM16 :
 514       errmsg = parse_imm16 (cd, strp, MT_OPERAND_IMM16, (long *) (& fields->f_imm16s));
 515       break;
 516     case MT_OPERAND_IMM16L :
 517       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_IMM16L, (unsigned long *) (& fields->f_imm16l));
 518       break;
 519     case MT_OPERAND_IMM16O :
 520       errmsg = parse_imm16 (cd, strp, MT_OPERAND_IMM16O, (unsigned long *) (& fields->f_imm16s));
 521       break;
 522     case MT_OPERAND_IMM16Z :
 523       errmsg = parse_imm16 (cd, strp, MT_OPERAND_IMM16Z, (unsigned long *) (& fields->f_imm16u));
 524       break;
 525     case MT_OPERAND_INCAMT :
 526       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_INCAMT, (unsigned long *) (& fields->f_incamt));
 527       break;
 528     case MT_OPERAND_INCR :
 529       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_INCR, (unsigned long *) (& fields->f_incr));
 530       break;
 531     case MT_OPERAND_LENGTH :
 532       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_LENGTH, (unsigned long *) (& fields->f_length));
 533       break;
 534     case MT_OPERAND_LOOPSIZE :
 535       errmsg = parse_loopsize (cd, strp, MT_OPERAND_LOOPSIZE, (unsigned long *) (& fields->f_loopo));
 536       break;
 537     case MT_OPERAND_MASK :
 538       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_MASK, (unsigned long *) (& fields->f_mask));
 539       break;
 540     case MT_OPERAND_MASK1 :
 541       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_MASK1, (unsigned long *) (& fields->f_mask1));
 542       break;
 543     case MT_OPERAND_MODE :
 544       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_MODE, (unsigned long *) (& fields->f_mode));
 545       break;
 546     case MT_OPERAND_PERM :
 547       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_PERM, (unsigned long *) (& fields->f_perm));
 548       break;
 549     case MT_OPERAND_RBBC :
 550       errmsg = parse_rbbc (cd, strp, MT_OPERAND_RBBC, (unsigned long *) (& fields->f_rbbc));
 551       break;
 552     case MT_OPERAND_RC :
 553       errmsg = parse_rc (cd, strp, MT_OPERAND_RC, (unsigned long *) (& fields->f_rc));
 554       break;
 555     case MT_OPERAND_RC1 :
 556       errmsg = parse_rc (cd, strp, MT_OPERAND_RC1, (unsigned long *) (& fields->f_rc1));
 557       break;
 558     case MT_OPERAND_RC2 :
 559       errmsg = parse_rc (cd, strp, MT_OPERAND_RC2, (unsigned long *) (& fields->f_rc2));
 560       break;
 561     case MT_OPERAND_RC3 :
 562       errmsg = parse_rc (cd, strp, MT_OPERAND_RC3, (unsigned long *) (& fields->f_rc3));
 563       break;
 564     case MT_OPERAND_RCNUM :
 565       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_RCNUM, (unsigned long *) (& fields->f_rcnum));
 566       break;
 567     case MT_OPERAND_RDA :
 568       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_RDA, (unsigned long *) (& fields->f_rda));
 569       break;
 570     case MT_OPERAND_ROWNUM :
 571       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_ROWNUM, (unsigned long *) (& fields->f_rownum));
 572       break;
 573     case MT_OPERAND_ROWNUM1 :
 574       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_ROWNUM1, (unsigned long *) (& fields->f_rownum1));
 575       break;
 576     case MT_OPERAND_ROWNUM2 :
 577       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_ROWNUM2, (unsigned long *) (& fields->f_rownum2));
 578       break;
 579     case MT_OPERAND_SIZE :
 580       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_SIZE, (unsigned long *) (& fields->f_size));
 581       break;
 582     case MT_OPERAND_TYPE :
 583       errmsg = parse_type (cd, strp, MT_OPERAND_TYPE, (unsigned long *) (& fields->f_type));
 584       break;
 585     case MT_OPERAND_WR :
 586       errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_WR, (unsigned long *) (& fields->f_wr));
 587       break;
 588     case MT_OPERAND_XMODE :
 589       errmsg = parse_xmode (cd, strp, MT_OPERAND_XMODE, (unsigned long *) (& fields->f_xmode));
 590       break;
 591
 592     default :
 593       /* xgettext:c-format */
 594       fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
 595       abort ();
 596   }
 597
 598   return errmsg;
 599 }
 600
 601 cgen_parse_fn * const mt_cgen_parse_handlers[] =
 602 {
 603   parse_insn_normal,
 604 };
 605
 606 void
 607 mt_cgen_init_asm (CGEN_CPU_DESC cd)
 608 {
 609   mt_cgen_init_opcode_table (cd);
 610   mt_cgen_init_ibld_table (cd);
 611   cd->parse_handlers = & mt_cgen_parse_handlers[0];
 612   cd->parse_operand = mt_cgen_parse_operand;
 613 #ifdef CGEN_ASM_INIT_HOOK
 614 CGEN_ASM_INIT_HOOK
 615 #endif
 616 }
 617
 618 \f
 619
 620 /* Regex construction routine.
 621
 622    This translates an opcode syntax string into a regex string,
 623    by replacing any non-character syntax element (such as an
 624    opcode) with the pattern '.*'
 625
 626    It then compiles the regex and stores it in the opcode, for
 627    later use by mt_cgen_assemble_insn
 628
 629    Returns NULL for success, an error message for failure.  */
 630
 631 char *
 632 mt_cgen_build_insn_regex (CGEN_INSN *insn)
 633 {
 634   CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
 635   const char *mnem = CGEN_INSN_MNEMONIC (insn);
 636   char rxbuf[CGEN_MAX_RX_ELEMENTS];
 637   char *rx = rxbuf;
 638   const CGEN_SYNTAX_CHAR_TYPE *syn;
 639   int reg_err;
 640
 641   syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
 642
 643   /* Mnemonics come first in the syntax string.  */
 644   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
 645     return _("missing mnemonic in syntax string");
 646   ++syn;
 647
 648   /* Generate a case sensitive regular expression that emulates case
 649      insensitive matching in the "C" locale.  We cannot generate a case
 650      insensitive regular expression because in Turkish locales, 'i' and 'I'
 651      are not equal modulo case conversion.  */
 652
 653   /* Copy the literal mnemonic out of the insn.  */
 654   for (; *mnem; mnem++)
 655     {
 656       char c = *mnem;
 657
 658       if (ISALPHA (c))
 659         {
 660           *rx++ = '[';
 661           *rx++ = TOLOWER (c);
 662           *rx++ = TOUPPER (c);
 663           *rx++ = ']';
 664         }
 665       else
 666         *rx++ = c;
 667     }
 668
 669   /* Copy any remaining literals from the syntax string into the rx.  */
 670   for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
 671     {
 672       if (CGEN_SYNTAX_CHAR_P (* syn))
 673         {
 674           char c = CGEN_SYNTAX_CHAR (* syn);
 675
 676           switch (c)
 677             {
 678               /* Escape any regex metacharacters in the syntax.  */
 679             case '.': case '[': case '\\':
 680             case '*': case '^': case '$':
 681
 682 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
 683             case '?': case '{': case '}':
 684             case '(': case ')': case '*':
 685             case '|': case '+': case ']':
 686 #endif
 687               *rx++ = '\\';
 688               *rx++ = c;
 689               break;
 690
 691             default:
 692               if (ISALPHA (c))
 693                 {
 694                   *rx++ = '[';
 695                   *rx++ = TOLOWER (c);
 696                   *rx++ = TOUPPER (c);
 697                   *rx++ = ']';
 698                 }
 699               else
 700                 *rx++ = c;
 701               break;
 702             }
 703         }
 704       else
 705         {
 706           /* Replace non-syntax fields with globs.  */
 707           *rx++ = '.';
 708           *rx++ = '*';
 709         }
 710     }
 711
 712   /* Trailing whitespace ok.  */
 713   * rx++ = '[';
 714   * rx++ = ' ';
 715   * rx++ = '\t';
 716   * rx++ = ']';
 717   * rx++ = '*';
 718
 719   /* But anchor it after that.  */
 720   * rx++ = '$';
 721   * rx = '\0';
 722
 723   CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
 724   reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
 725
 726   if (reg_err == 0)
 727     return NULL;
 728   else
 729     {
 730       static char msg[80];
 731
 732       regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
 733       regfree ((regex_t *) CGEN_INSN_RX (insn));
 734       free (CGEN_INSN_RX (insn));
 735       (CGEN_INSN_RX (insn)) = NULL;
 736       return msg;
 737     }
 738 }
 739
 740 \f
 741 /* Default insn parser.
 742
 743    The syntax string is scanned and operands are parsed and stored in FIELDS.
 744    Relocs are queued as we go via other callbacks.
 745
 746    ??? Note that this is currently an all-or-nothing parser.  If we fail to
 747    parse the instruction, we return 0 and the caller will start over from
 748    the beginning.  Backtracking will be necessary in parsing subexpressions,
 749    but that can be handled there.  Not handling backtracking here may get
 750    expensive in the case of the m68k.  Deal with later.
 751
 752    Returns NULL for success, an error message for failure.  */
 753
 754 static const char *
 755 parse_insn_normal (CGEN_CPU_DESC cd,
 756                    const CGEN_INSN *insn,
 757                    const char **strp,
 758                    CGEN_FIELDS *fields)
 759 {
 760   /* ??? Runtime added insns not handled yet.  */
 761   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 762   const char *str = *strp;
 763   const char *errmsg;
 764   const char *p;
 765   const CGEN_SYNTAX_CHAR_TYPE * syn;
 766 #ifdef CGEN_MNEMONIC_OPERANDS
 767   /* FIXME: wip */
 768   int past_opcode_p;
 769 #endif
 770
 771   /* For now we assume the mnemonic is first (there are no leading operands).
 772      We can parse it without needing to set up operand parsing.
 773      GAS's input scrubber will ensure mnemonics are lowercase, but we may
 774      not be called from GAS.  */
 775   p = CGEN_INSN_MNEMONIC (insn);
 776   while (*p && TOLOWER (*p) == TOLOWER (*str))
 777     ++p, ++str;
 778
 779   if (* p)
 780     return _("unrecognized instruction");
 781
 782 #ifndef CGEN_MNEMONIC_OPERANDS
 783   if (* str && ! ISSPACE (* str))
 784     return _("unrecognized instruction");
 785 #endif
 786
 787   CGEN_INIT_PARSE (cd);
 788   cgen_init_parse_operand (cd);
 789 #ifdef CGEN_MNEMONIC_OPERANDS
 790   past_opcode_p = 0;
 791 #endif
 792
 793   /* We don't check for (*str != '\0') here because we want to parse
 794      any trailing fake arguments in the syntax string.  */
 795   syn = CGEN_SYNTAX_STRING (syntax);
 796
 797   /* Mnemonics come first for now, ensure valid string.  */
 798   if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
 799     abort ();
 800
 801   ++syn;
 802
 803   while (* syn != 0)
 804     {
 805       /* Non operand chars must match exactly.  */
 806       if (CGEN_SYNTAX_CHAR_P (* syn))
 807         {
 808           /* FIXME: While we allow for non-GAS callers above, we assume the
 809              first char after the mnemonic part is a space.  */
 810           /* FIXME: We also take inappropriate advantage of the fact that
 811              GAS's input scrubber will remove extraneous blanks.  */
 812           if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
 813             {
 814 #ifdef CGEN_MNEMONIC_OPERANDS
 815               if (CGEN_SYNTAX_CHAR(* syn) == ' ')
 816                 past_opcode_p = 1;
 817 #endif
 818               ++ syn;
 819               ++ str;
 820             }
 821           else if (*str)
 822             {
 823               /* Syntax char didn't match.  Can't be this insn.  */
 824               static char msg [80];
 825
 826               /* xgettext:c-format */
 827               sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
 828                        CGEN_SYNTAX_CHAR(*syn), *str);
 829               return msg;
 830             }
 831           else
 832             {
 833               /* Ran out of input.  */
 834               static char msg [80];
 835
 836               /* xgettext:c-format */
 837               sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
 838                        CGEN_SYNTAX_CHAR(*syn));
 839               return msg;
 840             }
 841           continue;
 842         }
 843
 844 #ifdef CGEN_MNEMONIC_OPERANDS
 845       (void) past_opcode_p;
 846 #endif
 847       /* We have an operand of some sort.  */
 848       errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
 849       if (errmsg)
 850         return errmsg;
 851
 852       /* Done with this operand, continue with next one.  */
 853       ++ syn;
 854     }
 855
 856   /* If we're at the end of the syntax string, we're done.  */
 857   if (* syn == 0)
 858     {
 859       /* FIXME: For the moment we assume a valid `str' can only contain
 860          blanks now.  IE: We needn't try again with a longer version of
 861          the insn and it is assumed that longer versions of insns appear
 862          before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
 863       while (ISSPACE (* str))
 864         ++ str;
 865
 866       if (* str != '\0')
 867         return _("junk at end of line"); /* FIXME: would like to include `str' */
 868
 869       return NULL;
 870     }
 871
 872   /* We couldn't parse it.  */
 873   return _("unrecognized instruction");
 874 }
 875 \f
 876 /* Main entry point.
 877    This routine is called for each instruction to be assembled.
 878    STR points to the insn to be assembled.
 879    We assume all necessary tables have been initialized.
 880    The assembled instruction, less any fixups, is stored in BUF.
 881    Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
 882    still needs to be converted to target byte order, otherwise BUF is an array
 883    of bytes in target byte order.
 884    The result is a pointer to the insn's entry in the opcode table,
 885    or NULL if an error occured (an error message will have already been
 886    printed).
 887
 888    Note that when processing (non-alias) macro-insns,
 889    this function recurses.
 890
 891    ??? It's possible to make this cpu-independent.
 892    One would have to deal with a few minor things.
 893    At this point in time doing so would be more of a curiosity than useful
 894    [for example this file isn't _that_ big], but keeping the possibility in
 895    mind helps keep the design clean.  */
 896
 897 const CGEN_INSN *
 898 mt_cgen_assemble_insn (CGEN_CPU_DESC cd,
 899                            const char *str,
 900                            CGEN_FIELDS *fields,
 901                            CGEN_INSN_BYTES_PTR buf,
 902                            char **errmsg)
 903 {
 904   const char *start;
 905   CGEN_INSN_LIST *ilist;
 906   const char *parse_errmsg = NULL;
 907   const char *insert_errmsg = NULL;
 908   int recognized_mnemonic = 0;
 909
 910   /* Skip leading white space.  */
 911   while (ISSPACE (* str))
 912     ++ str;
 913
 914   /* The instructions are stored in hashed lists.
 915      Get the first in the list.  */
 916   ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
 917
 918   /* Keep looking until we find a match.  */
 919   start = str;
 920   for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
 921     {
 922       const CGEN_INSN *insn = ilist->insn;
 923       recognized_mnemonic = 1;
 924
 925 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
 926       /* Not usually needed as unsupported opcodes
 927          shouldn't be in the hash lists.  */
 928       /* Is this insn supported by the selected cpu?  */
 929       if (! mt_cgen_insn_supported (cd, insn))
 930         continue;
 931 #endif
 932       /* If the RELAXED attribute is set, this is an insn that shouldn't be
 933          chosen immediately.  Instead, it is used during assembler/linker
 934          relaxation if possible.  */
 935       if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
 936         continue;
 937
 938       str = start;
 939
 940       /* Skip this insn if str doesn't look right lexically.  */
 941       if (CGEN_INSN_RX (insn) != NULL &&
 942           regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
 943         continue;
 944
 945       /* Allow parse/insert handlers to obtain length of insn.  */
 946       CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
 947
 948       parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
 949       if (parse_errmsg != NULL)
 950         continue;
 951
 952       /* ??? 0 is passed for `pc'.  */
 953       insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
 954                                                  (bfd_vma) 0);
 955       if (insert_errmsg != NULL)
 956         continue;
 957
 958       /* It is up to the caller to actually output the insn and any
 959          queued relocs.  */
 960       return insn;
 961     }
 962
 963   {
 964     static char errbuf[150];
 965     const char *tmp_errmsg;
 966 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
 967 #define be_verbose 1
 968 #else
 969 #define be_verbose 0
 970 #endif
 971
 972     if (be_verbose)
 973       {
 974         /* If requesting verbose error messages, use insert_errmsg.
 975            Failing that, use parse_errmsg.  */
 976         tmp_errmsg = (insert_errmsg ? insert_errmsg :
 977                       parse_errmsg ? parse_errmsg :
 978                       recognized_mnemonic ?
 979                       _("unrecognized form of instruction") :
 980                       _("unrecognized instruction"));
 981
 982         if (strlen (start) > 50)
 983           /* xgettext:c-format */
 984           sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
 985         else
 986           /* xgettext:c-format */
 987           sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
 988       }
 989     else
 990       {
 991         if (strlen (start) > 50)
 992           /* xgettext:c-format */
 993           sprintf (errbuf, _("bad instruction `%.50s...'"), start);
 994         else
 995           /* xgettext:c-format */
 996           sprintf (errbuf, _("bad instruction `%.50s'"), start);
 997       }
 998
 999     *errmsg = errbuf;
1000     return NULL;
1001   }
1002 }