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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [opcodes/] [fr30-asm.c] - Blame information for rev 157

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1 24 jeremybenn
/* 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
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 "fr30-desc.h"
36
#include "fr30-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
 
50
/* -- assembler routines inserted here.  */
51
 
52
/* -- asm.c */
53
/* Handle register lists for LDMx and STMx.  */
54
 
55
static int
56
parse_register_number (const char **strp)
57
{
58
  int regno;
59
 
60
  if (**strp < '0' || **strp > '9')
61
    return -1; /* Error.  */
62
  regno = **strp - '0';
63
  ++*strp;
64
 
65
  if (**strp >= '0' && **strp <= '9')
66
    {
67
      regno = regno * 10 + (**strp - '0');
68
      ++*strp;
69
    }
70
 
71
  return regno;
72
}
73
 
74
static const char *
75
parse_register_list (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
76
                     const char **strp,
77
                     int opindex ATTRIBUTE_UNUSED,
78
                     unsigned long *valuep,
79
                     int high_low,   /* 0 == high, 1 == low.  */
80
                     int load_store) /* 0 == load, 1 == store.  */
81
{
82
  *valuep = 0;
83
  while (**strp && **strp != ')')
84
    {
85
      int regno;
86
 
87
      if (**strp != 'R' && **strp != 'r')
88
        break;
89
      ++*strp;
90
 
91
      regno = parse_register_number (strp);
92
      if (regno == -1)
93
        return _("Register number is not valid");
94
      if (regno > 7 && !high_low)
95
        return _("Register must be between r0 and r7");
96
      if (regno < 8 && high_low)
97
        return _("Register must be between r8 and r15");
98
 
99
      if (high_low)
100
        regno -= 8;
101
 
102
      if (load_store) /* Mask is reversed for store.  */
103
        *valuep |= 0x80 >> regno;
104
      else
105
        *valuep |= 1 << regno;
106
 
107
      if (**strp == ',')
108
        {
109
          if (*(*strp + 1) == ')')
110
            break;
111
          ++*strp;
112
        }
113
    }
114
 
115
  if (!*strp || **strp != ')')
116
    return _("Register list is not valid");
117
 
118
  return NULL;
119
}
120
 
121
static const char *
122
parse_low_register_list_ld (CGEN_CPU_DESC cd,
123
                            const char **strp,
124
                            int opindex,
125
                            unsigned long *valuep)
126
{
127
  return parse_register_list (cd, strp, opindex, valuep,
128
 
129
}
130
 
131
static const char *
132
parse_hi_register_list_ld (CGEN_CPU_DESC cd,
133
                           const char **strp,
134
                           int opindex,
135
                           unsigned long *valuep)
136
{
137
  return parse_register_list (cd, strp, opindex, valuep,
138
                              1 /* High.  */, 0 /* Load.  */);
139
}
140
 
141
static const char *
142
parse_low_register_list_st (CGEN_CPU_DESC cd,
143
                            const char **strp,
144
                            int opindex,
145
                            unsigned long *valuep)
146
{
147
  return parse_register_list (cd, strp, opindex, valuep,
148
 
149
}
150
 
151
static const char *
152
parse_hi_register_list_st (CGEN_CPU_DESC cd,
153
                           const char **strp,
154
                           int opindex,
155
                           unsigned long *valuep)
156
{
157
  return parse_register_list (cd, strp, opindex, valuep,
158
                              1 /* High.  */, 1 /* Store.  */);
159
}
160
 
161
/* -- */
162
 
163
const char * fr30_cgen_parse_operand
164
  (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
165
 
166
/* Main entry point for operand parsing.
167
 
168
   This function is basically just a big switch statement.  Earlier versions
169
   used tables to look up the function to use, but
170
   - if the table contains both assembler and disassembler functions then
171
     the disassembler contains much of the assembler and vice-versa,
172
   - there's a lot of inlining possibilities as things grow,
173
   - using a switch statement avoids the function call overhead.
174
 
175
   This function could be moved into `parse_insn_normal', but keeping it
176
   separate makes clear the interface between `parse_insn_normal' and each of
177
   the handlers.  */
178
 
179
const char *
180
fr30_cgen_parse_operand (CGEN_CPU_DESC cd,
181
                           int opindex,
182
                           const char ** strp,
183
                           CGEN_FIELDS * fields)
184
{
185
  const char * errmsg = NULL;
186
  /* Used by scalar operands that still need to be parsed.  */
187
  long junk ATTRIBUTE_UNUSED;
188
 
189
  switch (opindex)
190
    {
191
    case FR30_OPERAND_CRI :
192
      errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_cr_names, & fields->f_CRi);
193
      break;
194
    case FR30_OPERAND_CRJ :
195
      errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_cr_names, & fields->f_CRj);
196
      break;
197
    case FR30_OPERAND_R13 :
198
      errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r13, & junk);
199
      break;
200
    case FR30_OPERAND_R14 :
201
      errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r14, & junk);
202
      break;
203
    case FR30_OPERAND_R15 :
204
      errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r15, & junk);
205
      break;
206
    case FR30_OPERAND_RI :
207
      errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Ri);
208
      break;
209
    case FR30_OPERAND_RIC :
210
      errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Ric);
211
      break;
212
    case FR30_OPERAND_RJ :
213
      errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Rj);
214
      break;
215
    case FR30_OPERAND_RJC :
216
      errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Rjc);
217
      break;
218
    case FR30_OPERAND_RS1 :
219
      errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_dr_names, & fields->f_Rs1);
220
      break;
221
    case FR30_OPERAND_RS2 :
222
      errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_dr_names, & fields->f_Rs2);
223
      break;
224
    case FR30_OPERAND_CC :
225
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_CC, (unsigned long *) (& fields->f_cc));
226
      break;
227
    case FR30_OPERAND_CCC :
228
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_CCC, (unsigned long *) (& fields->f_ccc));
229
      break;
230
    case FR30_OPERAND_DIR10 :
231
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR10, (unsigned long *) (& fields->f_dir10));
232
      break;
233
    case FR30_OPERAND_DIR8 :
234
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR8, (unsigned long *) (& fields->f_dir8));
235
      break;
236
    case FR30_OPERAND_DIR9 :
237
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR9, (unsigned long *) (& fields->f_dir9));
238
      break;
239
    case FR30_OPERAND_DISP10 :
240
      errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP10, (long *) (& fields->f_disp10));
241
      break;
242
    case FR30_OPERAND_DISP8 :
243
      errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP8, (long *) (& fields->f_disp8));
244
      break;
245
    case FR30_OPERAND_DISP9 :
246
      errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP9, (long *) (& fields->f_disp9));
247
      break;
248
    case FR30_OPERAND_I20 :
249
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I20, (unsigned long *) (& fields->f_i20));
250
      break;
251
    case FR30_OPERAND_I32 :
252
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I32, (unsigned long *) (& fields->f_i32));
253
      break;
254
    case FR30_OPERAND_I8 :
255
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I8, (unsigned long *) (& fields->f_i8));
256
      break;
257
    case FR30_OPERAND_LABEL12 :
258
      {
259
        bfd_vma value = 0;
260
        errmsg = cgen_parse_address (cd, strp, FR30_OPERAND_LABEL12, 0, NULL,  & value);
261
        fields->f_rel12 = value;
262
      }
263
      break;
264
    case FR30_OPERAND_LABEL9 :
265
      {
266
        bfd_vma value = 0;
267
        errmsg = cgen_parse_address (cd, strp, FR30_OPERAND_LABEL9, 0, NULL,  & value);
268
        fields->f_rel9 = value;
269
      }
270
      break;
271
    case FR30_OPERAND_M4 :
272
      errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_M4, (long *) (& fields->f_m4));
273
      break;
274
    case FR30_OPERAND_PS :
275
      errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_ps, & junk);
276
      break;
277
    case FR30_OPERAND_REGLIST_HI_LD :
278
      errmsg = parse_hi_register_list_ld (cd, strp, FR30_OPERAND_REGLIST_HI_LD, (unsigned long *) (& fields->f_reglist_hi_ld));
279
      break;
280
    case FR30_OPERAND_REGLIST_HI_ST :
281
      errmsg = parse_hi_register_list_st (cd, strp, FR30_OPERAND_REGLIST_HI_ST, (unsigned long *) (& fields->f_reglist_hi_st));
282
      break;
283
    case FR30_OPERAND_REGLIST_LOW_LD :
284
      errmsg = parse_low_register_list_ld (cd, strp, FR30_OPERAND_REGLIST_LOW_LD, (unsigned long *) (& fields->f_reglist_low_ld));
285
      break;
286
    case FR30_OPERAND_REGLIST_LOW_ST :
287
      errmsg = parse_low_register_list_st (cd, strp, FR30_OPERAND_REGLIST_LOW_ST, (unsigned long *) (& fields->f_reglist_low_st));
288
      break;
289
    case FR30_OPERAND_S10 :
290
      errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_S10, (long *) (& fields->f_s10));
291
      break;
292
    case FR30_OPERAND_U10 :
293
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U10, (unsigned long *) (& fields->f_u10));
294
      break;
295
    case FR30_OPERAND_U4 :
296
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U4, (unsigned long *) (& fields->f_u4));
297
      break;
298
    case FR30_OPERAND_U4C :
299
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U4C, (unsigned long *) (& fields->f_u4c));
300
      break;
301
    case FR30_OPERAND_U8 :
302
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U8, (unsigned long *) (& fields->f_u8));
303
      break;
304
    case FR30_OPERAND_UDISP6 :
305
      errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_UDISP6, (unsigned long *) (& fields->f_udisp6));
306
      break;
307
 
308
    default :
309
      /* xgettext:c-format */
310
      fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
311
      abort ();
312
  }
313
 
314
  return errmsg;
315
}
316
 
317
cgen_parse_fn * const fr30_cgen_parse_handlers[] =
318
{
319
  parse_insn_normal,
320
};
321
 
322
void
323
fr30_cgen_init_asm (CGEN_CPU_DESC cd)
324
{
325
  fr30_cgen_init_opcode_table (cd);
326
  fr30_cgen_init_ibld_table (cd);
327
  cd->parse_handlers = & fr30_cgen_parse_handlers[0];
328
  cd->parse_operand = fr30_cgen_parse_operand;
329
#ifdef CGEN_ASM_INIT_HOOK
330
CGEN_ASM_INIT_HOOK
331
#endif
332
}
333
 
334
 
335
 
336
/* Regex construction routine.
337
 
338
   This translates an opcode syntax string into a regex string,
339
   by replacing any non-character syntax element (such as an
340
   opcode) with the pattern '.*'
341
 
342
   It then compiles the regex and stores it in the opcode, for
343
   later use by fr30_cgen_assemble_insn
344
 
345
   Returns NULL for success, an error message for failure.  */
346
 
347
char *
348
fr30_cgen_build_insn_regex (CGEN_INSN *insn)
349
{
350
  CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
351
  const char *mnem = CGEN_INSN_MNEMONIC (insn);
352
  char rxbuf[CGEN_MAX_RX_ELEMENTS];
353
  char *rx = rxbuf;
354
  const CGEN_SYNTAX_CHAR_TYPE *syn;
355
  int reg_err;
356
 
357
  syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
358
 
359
  /* Mnemonics come first in the syntax string.  */
360
  if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
361
    return _("missing mnemonic in syntax string");
362
  ++syn;
363
 
364
  /* Generate a case sensitive regular expression that emulates case
365
     insensitive matching in the "C" locale.  We cannot generate a case
366
     insensitive regular expression because in Turkish locales, 'i' and 'I'
367
     are not equal modulo case conversion.  */
368
 
369
  /* Copy the literal mnemonic out of the insn.  */
370
  for (; *mnem; mnem++)
371
    {
372
      char c = *mnem;
373
 
374
      if (ISALPHA (c))
375
        {
376
          *rx++ = '[';
377
          *rx++ = TOLOWER (c);
378
          *rx++ = TOUPPER (c);
379
          *rx++ = ']';
380
        }
381
      else
382
        *rx++ = c;
383
    }
384
 
385
  /* Copy any remaining literals from the syntax string into the rx.  */
386
  for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
387
    {
388
      if (CGEN_SYNTAX_CHAR_P (* syn))
389
        {
390
          char c = CGEN_SYNTAX_CHAR (* syn);
391
 
392
          switch (c)
393
            {
394
              /* Escape any regex metacharacters in the syntax.  */
395
            case '.': case '[': case '\\':
396
            case '*': case '^': case '$':
397
 
398
#ifdef CGEN_ESCAPE_EXTENDED_REGEX
399
            case '?': case '{': case '}':
400
            case '(': case ')': case '*':
401
            case '|': case '+': case ']':
402
#endif
403
              *rx++ = '\\';
404
              *rx++ = c;
405
              break;
406
 
407
            default:
408
              if (ISALPHA (c))
409
                {
410
                  *rx++ = '[';
411
                  *rx++ = TOLOWER (c);
412
                  *rx++ = TOUPPER (c);
413
                  *rx++ = ']';
414
                }
415
              else
416
                *rx++ = c;
417
              break;
418
            }
419
        }
420
      else
421
        {
422
          /* Replace non-syntax fields with globs.  */
423
          *rx++ = '.';
424
          *rx++ = '*';
425
        }
426
    }
427
 
428
  /* Trailing whitespace ok.  */
429
  * rx++ = '[';
430
  * rx++ = ' ';
431
  * rx++ = '\t';
432
  * rx++ = ']';
433
  * rx++ = '*';
434
 
435
  /* But anchor it after that.  */
436
  * rx++ = '$';
437
  * rx = '\0';
438
 
439
  CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
440
  reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
441
 
442
  if (reg_err == 0)
443
    return NULL;
444
  else
445
    {
446
      static char msg[80];
447
 
448
      regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
449
      regfree ((regex_t *) CGEN_INSN_RX (insn));
450
      free (CGEN_INSN_RX (insn));
451
      (CGEN_INSN_RX (insn)) = NULL;
452
      return msg;
453
    }
454
}
455
 
456
 
457
/* Default insn parser.
458
 
459
   The syntax string is scanned and operands are parsed and stored in FIELDS.
460
   Relocs are queued as we go via other callbacks.
461
 
462
   ??? Note that this is currently an all-or-nothing parser.  If we fail to
463
   parse the instruction, we return 0 and the caller will start over from
464
   the beginning.  Backtracking will be necessary in parsing subexpressions,
465
   but that can be handled there.  Not handling backtracking here may get
466
   expensive in the case of the m68k.  Deal with later.
467
 
468
   Returns NULL for success, an error message for failure.  */
469
 
470
static const char *
471
parse_insn_normal (CGEN_CPU_DESC cd,
472
                   const CGEN_INSN *insn,
473
                   const char **strp,
474
                   CGEN_FIELDS *fields)
475
{
476
  /* ??? Runtime added insns not handled yet.  */
477
  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
478
  const char *str = *strp;
479
  const char *errmsg;
480
  const char *p;
481
  const CGEN_SYNTAX_CHAR_TYPE * syn;
482
#ifdef CGEN_MNEMONIC_OPERANDS
483
  /* FIXME: wip */
484
  int past_opcode_p;
485
#endif
486
 
487
  /* For now we assume the mnemonic is first (there are no leading operands).
488
     We can parse it without needing to set up operand parsing.
489
     GAS's input scrubber will ensure mnemonics are lowercase, but we may
490
     not be called from GAS.  */
491
  p = CGEN_INSN_MNEMONIC (insn);
492
  while (*p && TOLOWER (*p) == TOLOWER (*str))
493
    ++p, ++str;
494
 
495
  if (* p)
496
    return _("unrecognized instruction");
497
 
498
#ifndef CGEN_MNEMONIC_OPERANDS
499
  if (* str && ! ISSPACE (* str))
500
    return _("unrecognized instruction");
501
#endif
502
 
503
  CGEN_INIT_PARSE (cd);
504
  cgen_init_parse_operand (cd);
505
#ifdef CGEN_MNEMONIC_OPERANDS
506
  past_opcode_p = 0;
507
#endif
508
 
509
  /* We don't check for (*str != '\0') here because we want to parse
510
     any trailing fake arguments in the syntax string.  */
511
  syn = CGEN_SYNTAX_STRING (syntax);
512
 
513
  /* Mnemonics come first for now, ensure valid string.  */
514
  if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
515
    abort ();
516
 
517
  ++syn;
518
 
519
  while (* syn != 0)
520
    {
521
      /* Non operand chars must match exactly.  */
522
      if (CGEN_SYNTAX_CHAR_P (* syn))
523
        {
524
          /* FIXME: While we allow for non-GAS callers above, we assume the
525
             first char after the mnemonic part is a space.  */
526
          /* FIXME: We also take inappropriate advantage of the fact that
527
             GAS's input scrubber will remove extraneous blanks.  */
528
          if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
529
            {
530
#ifdef CGEN_MNEMONIC_OPERANDS
531
              if (CGEN_SYNTAX_CHAR(* syn) == ' ')
532
                past_opcode_p = 1;
533
#endif
534
              ++ syn;
535
              ++ str;
536
            }
537
          else if (*str)
538
            {
539
              /* Syntax char didn't match.  Can't be this insn.  */
540
              static char msg [80];
541
 
542
              /* xgettext:c-format */
543
              sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
544
                       CGEN_SYNTAX_CHAR(*syn), *str);
545
              return msg;
546
            }
547
          else
548
            {
549
              /* Ran out of input.  */
550
              static char msg [80];
551
 
552
              /* xgettext:c-format */
553
              sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
554
                       CGEN_SYNTAX_CHAR(*syn));
555
              return msg;
556
            }
557
          continue;
558
        }
559
 
560
      /* We have an operand of some sort.  */
561
      errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
562
                                          &str, fields);
563
      if (errmsg)
564
        return errmsg;
565
 
566
      /* Done with this operand, continue with next one.  */
567
      ++ syn;
568
    }
569
 
570
  /* If we're at the end of the syntax string, we're done.  */
571
  if (* syn == 0)
572
    {
573
      /* FIXME: For the moment we assume a valid `str' can only contain
574
         blanks now.  IE: We needn't try again with a longer version of
575
         the insn and it is assumed that longer versions of insns appear
576
         before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
577
      while (ISSPACE (* str))
578
        ++ str;
579
 
580
      if (* str != '\0')
581
        return _("junk at end of line"); /* FIXME: would like to include `str' */
582
 
583
      return NULL;
584
    }
585
 
586
  /* We couldn't parse it.  */
587
  return _("unrecognized instruction");
588
}
589
 
590
/* Main entry point.
591
   This routine is called for each instruction to be assembled.
592
   STR points to the insn to be assembled.
593
   We assume all necessary tables have been initialized.
594
   The assembled instruction, less any fixups, is stored in BUF.
595
   Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
596
   still needs to be converted to target byte order, otherwise BUF is an array
597
   of bytes in target byte order.
598
   The result is a pointer to the insn's entry in the opcode table,
599
   or NULL if an error occured (an error message will have already been
600
   printed).
601
 
602
   Note that when processing (non-alias) macro-insns,
603
   this function recurses.
604
 
605
   ??? It's possible to make this cpu-independent.
606
   One would have to deal with a few minor things.
607
   At this point in time doing so would be more of a curiosity than useful
608
   [for example this file isn't _that_ big], but keeping the possibility in
609
   mind helps keep the design clean.  */
610
 
611
const CGEN_INSN *
612
fr30_cgen_assemble_insn (CGEN_CPU_DESC cd,
613
                           const char *str,
614
                           CGEN_FIELDS *fields,
615
                           CGEN_INSN_BYTES_PTR buf,
616
                           char **errmsg)
617
{
618
  const char *start;
619
  CGEN_INSN_LIST *ilist;
620
  const char *parse_errmsg = NULL;
621
  const char *insert_errmsg = NULL;
622
  int recognized_mnemonic = 0;
623
 
624
  /* Skip leading white space.  */
625
  while (ISSPACE (* str))
626
    ++ str;
627
 
628
  /* The instructions are stored in hashed lists.
629
     Get the first in the list.  */
630
  ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
631
 
632
  /* Keep looking until we find a match.  */
633
  start = str;
634
  for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
635
    {
636
      const CGEN_INSN *insn = ilist->insn;
637
      recognized_mnemonic = 1;
638
 
639
#ifdef CGEN_VALIDATE_INSN_SUPPORTED 
640
      /* Not usually needed as unsupported opcodes
641
         shouldn't be in the hash lists.  */
642
      /* Is this insn supported by the selected cpu?  */
643
      if (! fr30_cgen_insn_supported (cd, insn))
644
        continue;
645
#endif
646
      /* If the RELAXED attribute is set, this is an insn that shouldn't be
647
         chosen immediately.  Instead, it is used during assembler/linker
648
         relaxation if possible.  */
649
      if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
650
        continue;
651
 
652
      str = start;
653
 
654
      /* Skip this insn if str doesn't look right lexically.  */
655
      if (CGEN_INSN_RX (insn) != NULL &&
656
          regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
657
        continue;
658
 
659
      /* Allow parse/insert handlers to obtain length of insn.  */
660
      CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
661
 
662
      parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
663
      if (parse_errmsg != NULL)
664
        continue;
665
 
666
      /* ??? 0 is passed for `pc'.  */
667
      insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
668
                                                 (bfd_vma) 0);
669
      if (insert_errmsg != NULL)
670
        continue;
671
 
672
      /* It is up to the caller to actually output the insn and any
673
         queued relocs.  */
674
      return insn;
675
    }
676
 
677
  {
678
    static char errbuf[150];
679
#ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
680
    const char *tmp_errmsg;
681
 
682
    /* If requesting verbose error messages, use insert_errmsg.
683
       Failing that, use parse_errmsg.  */
684
    tmp_errmsg = (insert_errmsg ? insert_errmsg :
685
                  parse_errmsg ? parse_errmsg :
686
                  recognized_mnemonic ?
687
                  _("unrecognized form of instruction") :
688
                  _("unrecognized instruction"));
689
 
690
    if (strlen (start) > 50)
691
      /* xgettext:c-format */
692
      sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
693
    else
694
      /* xgettext:c-format */
695
      sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
696
#else
697
    if (strlen (start) > 50)
698
      /* xgettext:c-format */
699
      sprintf (errbuf, _("bad instruction `%.50s...'"), start);
700
    else
701
      /* xgettext:c-format */
702
      sprintf (errbuf, _("bad instruction `%.50s'"), start);
703
#endif
704
 
705
    *errmsg = errbuf;
706
    return NULL;
707
  }
708
}

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