source: binutils/trunk/opcodes/m32r-asm.c@ 1973

Last change on this file since 1973 was 1973, checked in by Silvan Scherrer, 8 years ago

binutils: update trunk to version 2.27
File size: 20.8 KB
Line 
1/* Assembler interface for targets using CGEN. -*- C -*-
2 CGEN: Cpu tools GENerator
3
4 THIS FILE IS MACHINE GENERATED WITH CGEN.
5 - the resultant file is machine generated, cgen-asm.in isn't
6
7 Copyright (C) 1996-2016 Free Software Foundation, Inc.
8
9 This file is part of libopcodes.
10
11 This library is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3, or (at your option)
14 any later version.
15
16 It is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19 License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software Foundation, Inc.,
23 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
24
25
26/* ??? Eventually more and more of this stuff can go to cpu-independent files.
27 Keep that in mind. */
28
29#include "sysdep.h"
30#include <stdio.h>
31#include "ansidecl.h"
32#include "bfd.h"
33#include "symcat.h"
34#include "m32r-desc.h"
35#include "m32r-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
46static const char * parse_insn_normal
47 (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
48
49
50/* -- assembler routines inserted here. */
51
52/* -- asm.c */
53static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'");
54
55/* Handle '#' prefixes (i.e. skip over them). */
56
57static const char *
58parse_hash (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
59 const char **strp,
60 int opindex ATTRIBUTE_UNUSED,
61 long *valuep ATTRIBUTE_UNUSED)
62{
63 if (**strp == '#')
64 ++*strp;
65 return NULL;
66}
67
68/* Handle shigh(), high(). */
69
70static const char *
71parse_hi16 (CGEN_CPU_DESC cd,
72 const char **strp,
73 int opindex,
74 unsigned long *valuep)
75{
76 const char *errmsg;
77 enum cgen_parse_operand_result result_type;
78 bfd_vma value;
79
80 if (**strp == '#')
81 ++*strp;
82
83 if (strncasecmp (*strp, "high(", 5) == 0)
84 {
85 *strp += 5;
86 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_HI16_ULO,
87 & result_type, & value);
88 if (**strp != ')')
89 return MISSING_CLOSING_PARENTHESIS;
90 ++*strp;
91 if (errmsg == NULL
92 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
93 {
94 value >>= 16;
95 value &= 0xffff;
96 }
97 *valuep = value;
98 return errmsg;
99 }
100 else if (strncasecmp (*strp, "shigh(", 6) == 0)
101 {
102 *strp += 6;
103 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_HI16_SLO,
104 & result_type, & value);
105 if (**strp != ')')
106 return MISSING_CLOSING_PARENTHESIS;
107 ++*strp;
108 if (errmsg == NULL
109 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
110 {
111 value += 0x8000;
112 value >>= 16;
113 value &= 0xffff;
114 }
115 *valuep = value;
116 return errmsg;
117 }
118
119 return cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
120}
121
122/* Handle low() in a signed context. Also handle sda().
123 The signedness of the value doesn't matter to low(), but this also
124 handles the case where low() isn't present. */
125
126static const char *
127parse_slo16 (CGEN_CPU_DESC cd,
128 const char ** strp,
129 int opindex,
130 long * valuep)
131{
132 const char *errmsg;
133 enum cgen_parse_operand_result result_type;
134 bfd_vma value;
135
136 if (**strp == '#')
137 ++*strp;
138
139 if (strncasecmp (*strp, "low(", 4) == 0)
140 {
141 *strp += 4;
142 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_LO16,
143 & result_type, & value);
144 if (**strp != ')')
145 return MISSING_CLOSING_PARENTHESIS;
146 ++*strp;
147 if (errmsg == NULL
148 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
149 value = ((value & 0xffff) ^ 0x8000) - 0x8000;
150 *valuep = value;
151 return errmsg;
152 }
153
154 if (strncasecmp (*strp, "sda(", 4) == 0)
155 {
156 *strp += 4;
157 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_SDA16,
158 NULL, & value);
159 if (**strp != ')')
160 return MISSING_CLOSING_PARENTHESIS;
161 ++*strp;
162 *valuep = value;
163 return errmsg;
164 }
165
166 return cgen_parse_signed_integer (cd, strp, opindex, valuep);
167}
168
169/* Handle low() in an unsigned context.
170 The signedness of the value doesn't matter to low(), but this also
171 handles the case where low() isn't present. */
172
173static const char *
174parse_ulo16 (CGEN_CPU_DESC cd,
175 const char **strp,
176 int opindex,
177 unsigned long *valuep)
178{
179 const char *errmsg;
180 enum cgen_parse_operand_result result_type;
181 bfd_vma value;
182
183 if (**strp == '#')
184 ++*strp;
185
186 if (strncasecmp (*strp, "low(", 4) == 0)
187 {
188 *strp += 4;
189 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_LO16,
190 & result_type, & value);
191 if (**strp != ')')
192 return MISSING_CLOSING_PARENTHESIS;
193 ++*strp;
194 if (errmsg == NULL
195 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
196 value &= 0xffff;
197 *valuep = value;
198 return errmsg;
199 }
200
201 return cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
202}
203
204/* -- */
205
206const char * m32r_cgen_parse_operand
207 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
208
209/* Main entry point for operand parsing.
210
211 This function is basically just a big switch statement. Earlier versions
212 used tables to look up the function to use, but
213 - if the table contains both assembler and disassembler functions then
214 the disassembler contains much of the assembler and vice-versa,
215 - there's a lot of inlining possibilities as things grow,
216 - using a switch statement avoids the function call overhead.
217
218 This function could be moved into `parse_insn_normal', but keeping it
219 separate makes clear the interface between `parse_insn_normal' and each of
220 the handlers. */
221
222const char *
223m32r_cgen_parse_operand (CGEN_CPU_DESC cd,
224 int opindex,
225 const char ** strp,
226 CGEN_FIELDS * fields)
227{
228 const char * errmsg = NULL;
229 /* Used by scalar operands that still need to be parsed. */
230 long junk ATTRIBUTE_UNUSED;
231
232 switch (opindex)
233 {
234 case M32R_OPERAND_ACC :
235 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_acc);
236 break;
237 case M32R_OPERAND_ACCD :
238 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_accd);
239 break;
240 case M32R_OPERAND_ACCS :
241 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_accs);
242 break;
243 case M32R_OPERAND_DCR :
244 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_cr_names, & fields->f_r1);
245 break;
246 case M32R_OPERAND_DISP16 :
247 {
248 bfd_vma value = 0;
249 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP16, 0, NULL, & value);
250 fields->f_disp16 = value;
251 }
252 break;
253 case M32R_OPERAND_DISP24 :
254 {
255 bfd_vma value = 0;
256 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP24, 0, NULL, & value);
257 fields->f_disp24 = value;
258 }
259 break;
260 case M32R_OPERAND_DISP8 :
261 {
262 bfd_vma value = 0;
263 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP8, 0, NULL, & value);
264 fields->f_disp8 = value;
265 }
266 break;
267 case M32R_OPERAND_DR :
268 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r1);
269 break;
270 case M32R_OPERAND_HASH :
271 errmsg = parse_hash (cd, strp, M32R_OPERAND_HASH, (long *) (& junk));
272 break;
273 case M32R_OPERAND_HI16 :
274 errmsg = parse_hi16 (cd, strp, M32R_OPERAND_HI16, (unsigned long *) (& fields->f_hi16));
275 break;
276 case M32R_OPERAND_IMM1 :
277 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_IMM1, (unsigned long *) (& fields->f_imm1));
278 break;
279 case M32R_OPERAND_SCR :
280 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_cr_names, & fields->f_r2);
281 break;
282 case M32R_OPERAND_SIMM16 :
283 errmsg = cgen_parse_signed_integer (cd, strp, M32R_OPERAND_SIMM16, (long *) (& fields->f_simm16));
284 break;
285 case M32R_OPERAND_SIMM8 :
286 errmsg = cgen_parse_signed_integer (cd, strp, M32R_OPERAND_SIMM8, (long *) (& fields->f_simm8));
287 break;
288 case M32R_OPERAND_SLO16 :
289 errmsg = parse_slo16 (cd, strp, M32R_OPERAND_SLO16, (long *) (& fields->f_simm16));
290 break;
291 case M32R_OPERAND_SR :
292 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r2);
293 break;
294 case M32R_OPERAND_SRC1 :
295 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r1);
296 break;
297 case M32R_OPERAND_SRC2 :
298 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r2);
299 break;
300 case M32R_OPERAND_UIMM16 :
301 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM16, (unsigned long *) (& fields->f_uimm16));
302 break;
303 case M32R_OPERAND_UIMM24 :
304 {
305 bfd_vma value = 0;
306 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_UIMM24, 0, NULL, & value);
307 fields->f_uimm24 = value;
308 }
309 break;
310 case M32R_OPERAND_UIMM3 :
311 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM3, (unsigned long *) (& fields->f_uimm3));
312 break;
313 case M32R_OPERAND_UIMM4 :
314 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM4, (unsigned long *) (& fields->f_uimm4));
315 break;
316 case M32R_OPERAND_UIMM5 :
317 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM5, (unsigned long *) (& fields->f_uimm5));
318 break;
319 case M32R_OPERAND_UIMM8 :
320 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM8, (unsigned long *) (& fields->f_uimm8));
321 break;
322 case M32R_OPERAND_ULO16 :
323 errmsg = parse_ulo16 (cd, strp, M32R_OPERAND_ULO16, (unsigned long *) (& fields->f_uimm16));
324 break;
325
326 default :
327 /* xgettext:c-format */
328 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
329 abort ();
330 }
331
332 return errmsg;
333}
334
335cgen_parse_fn * const m32r_cgen_parse_handlers[] =
336{
337 parse_insn_normal,
338};
339
340void
341m32r_cgen_init_asm (CGEN_CPU_DESC cd)
342{
343 m32r_cgen_init_opcode_table (cd);
344 m32r_cgen_init_ibld_table (cd);
345 cd->parse_handlers = & m32r_cgen_parse_handlers[0];
346 cd->parse_operand = m32r_cgen_parse_operand;
347#ifdef CGEN_ASM_INIT_HOOK
348CGEN_ASM_INIT_HOOK
349#endif
350}
351
352
353
354
355/* Regex construction routine.
356
357 This translates an opcode syntax string into a regex string,
358 by replacing any non-character syntax element (such as an
359 opcode) with the pattern '.*'
360
361 It then compiles the regex and stores it in the opcode, for
362 later use by m32r_cgen_assemble_insn
363
364 Returns NULL for success, an error message for failure. */
365
366char *
367m32r_cgen_build_insn_regex (CGEN_INSN *insn)
368{
369 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
370 const char *mnem = CGEN_INSN_MNEMONIC (insn);
371 char rxbuf[CGEN_MAX_RX_ELEMENTS];
372 char *rx = rxbuf;
373 const CGEN_SYNTAX_CHAR_TYPE *syn;
374 int reg_err;
375
376 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
377
378 /* Mnemonics come first in the syntax string. */
379 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
380 return _("missing mnemonic in syntax string");
381 ++syn;
382
383 /* Generate a case sensitive regular expression that emulates case
384 insensitive matching in the "C" locale. We cannot generate a case
385 insensitive regular expression because in Turkish locales, 'i' and 'I'
386 are not equal modulo case conversion. */
387
388 /* Copy the literal mnemonic out of the insn. */
389 for (; *mnem; mnem++)
390 {
391 char c = *mnem;
392
393 if (ISALPHA (c))
394 {
395 *rx++ = '[';
396 *rx++ = TOLOWER (c);
397 *rx++ = TOUPPER (c);
398 *rx++ = ']';
399 }
400 else
401 *rx++ = c;
402 }
403
404 /* Copy any remaining literals from the syntax string into the rx. */
405 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
406 {
407 if (CGEN_SYNTAX_CHAR_P (* syn))
408 {
409 char c = CGEN_SYNTAX_CHAR (* syn);
410
411 switch (c)
412 {
413 /* Escape any regex metacharacters in the syntax. */
414 case '.': case '[': case '\\':
415 case '*': case '^': case '$':
416
417#ifdef CGEN_ESCAPE_EXTENDED_REGEX
418 case '?': case '{': case '}':
419 case '(': case ')': case '*':
420 case '|': case '+': case ']':
421#endif
422 *rx++ = '\\';
423 *rx++ = c;
424 break;
425
426 default:
427 if (ISALPHA (c))
428 {
429 *rx++ = '[';
430 *rx++ = TOLOWER (c);
431 *rx++ = TOUPPER (c);
432 *rx++ = ']';
433 }
434 else
435 *rx++ = c;
436 break;
437 }
438 }
439 else
440 {
441 /* Replace non-syntax fields with globs. */
442 *rx++ = '.';
443 *rx++ = '*';
444 }
445 }
446
447 /* Trailing whitespace ok. */
448 * rx++ = '[';
449 * rx++ = ' ';
450 * rx++ = '\t';
451 * rx++ = ']';
452 * rx++ = '*';
453
454 /* But anchor it after that. */
455 * rx++ = '$';
456 * rx = '\0';
457
458 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
459 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
460
461 if (reg_err == 0)
462 return NULL;
463 else
464 {
465 static char msg[80];
466
467 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
468 regfree ((regex_t *) CGEN_INSN_RX (insn));
469 free (CGEN_INSN_RX (insn));
470 (CGEN_INSN_RX (insn)) = NULL;
471 return msg;
472 }
473}
474
475
476
477/* Default insn parser.
478
479 The syntax string is scanned and operands are parsed and stored in FIELDS.
480 Relocs are queued as we go via other callbacks.
481
482 ??? Note that this is currently an all-or-nothing parser. If we fail to
483 parse the instruction, we return 0 and the caller will start over from
484 the beginning. Backtracking will be necessary in parsing subexpressions,
485 but that can be handled there. Not handling backtracking here may get
486 expensive in the case of the m68k. Deal with later.
487
488 Returns NULL for success, an error message for failure. */
489
490static const char *
491parse_insn_normal (CGEN_CPU_DESC cd,
492 const CGEN_INSN *insn,
493 const char **strp,
494 CGEN_FIELDS *fields)
495{
496 /* ??? Runtime added insns not handled yet. */
497 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
498 const char *str = *strp;
499 const char *errmsg;
500 const char *p;
501 const CGEN_SYNTAX_CHAR_TYPE * syn;
502#ifdef CGEN_MNEMONIC_OPERANDS
503 /* FIXME: wip */
504 int past_opcode_p;
505#endif
506
507 /* For now we assume the mnemonic is first (there are no leading operands).
508 We can parse it without needing to set up operand parsing.
509 GAS's input scrubber will ensure mnemonics are lowercase, but we may
510 not be called from GAS. */
511 p = CGEN_INSN_MNEMONIC (insn);
512 while (*p && TOLOWER (*p) == TOLOWER (*str))
513 ++p, ++str;
514
515 if (* p)
516 return _("unrecognized instruction");
517
518#ifndef CGEN_MNEMONIC_OPERANDS
519 if (* str && ! ISSPACE (* str))
520 return _("unrecognized instruction");
521#endif
522
523 CGEN_INIT_PARSE (cd);
524 cgen_init_parse_operand (cd);
525#ifdef CGEN_MNEMONIC_OPERANDS
526 past_opcode_p = 0;
527#endif
528
529 /* We don't check for (*str != '\0') here because we want to parse
530 any trailing fake arguments in the syntax string. */
531 syn = CGEN_SYNTAX_STRING (syntax);
532
533 /* Mnemonics come first for now, ensure valid string. */
534 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
535 abort ();
536
537 ++syn;
538
539 while (* syn != 0)
540 {
541 /* Non operand chars must match exactly. */
542 if (CGEN_SYNTAX_CHAR_P (* syn))
543 {
544 /* FIXME: While we allow for non-GAS callers above, we assume the
545 first char after the mnemonic part is a space. */
546 /* FIXME: We also take inappropriate advantage of the fact that
547 GAS's input scrubber will remove extraneous blanks. */
548 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
549 {
550#ifdef CGEN_MNEMONIC_OPERANDS
551 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
552 past_opcode_p = 1;
553#endif
554 ++ syn;
555 ++ str;
556 }
557 else if (*str)
558 {
559 /* Syntax char didn't match. Can't be this insn. */
560 static char msg [80];
561
562 /* xgettext:c-format */
563 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
564 CGEN_SYNTAX_CHAR(*syn), *str);
565 return msg;
566 }
567 else
568 {
569 /* Ran out of input. */
570 static char msg [80];
571
572 /* xgettext:c-format */
573 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
574 CGEN_SYNTAX_CHAR(*syn));
575 return msg;
576 }
577 continue;
578 }
579
580#ifdef CGEN_MNEMONIC_OPERANDS
581 (void) past_opcode_p;
582#endif
583 /* We have an operand of some sort. */
584 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
585 if (errmsg)
586 return errmsg;
587
588 /* Done with this operand, continue with next one. */
589 ++ syn;
590 }
591
592 /* If we're at the end of the syntax string, we're done. */
593 if (* syn == 0)
594 {
595 /* FIXME: For the moment we assume a valid `str' can only contain
596 blanks now. IE: We needn't try again with a longer version of
597 the insn and it is assumed that longer versions of insns appear
598 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
599 while (ISSPACE (* str))
600 ++ str;
601
602 if (* str != '\0')
603 return _("junk at end of line"); /* FIXME: would like to include `str' */
604
605 return NULL;
606 }
607
608 /* We couldn't parse it. */
609 return _("unrecognized instruction");
610}
611
612
613/* Main entry point.
614 This routine is called for each instruction to be assembled.
615 STR points to the insn to be assembled.
616 We assume all necessary tables have been initialized.
617 The assembled instruction, less any fixups, is stored in BUF.
618 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
619 still needs to be converted to target byte order, otherwise BUF is an array
620 of bytes in target byte order.
621 The result is a pointer to the insn's entry in the opcode table,
622 or NULL if an error occured (an error message will have already been
623 printed).
624
625 Note that when processing (non-alias) macro-insns,
626 this function recurses.
627
628 ??? It's possible to make this cpu-independent.
629 One would have to deal with a few minor things.
630 At this point in time doing so would be more of a curiosity than useful
631 [for example this file isn't _that_ big], but keeping the possibility in
632 mind helps keep the design clean. */
633
634const CGEN_INSN *
635m32r_cgen_assemble_insn (CGEN_CPU_DESC cd,
636 const char *str,
637 CGEN_FIELDS *fields,
638 CGEN_INSN_BYTES_PTR buf,
639 char **errmsg)
640{
641 const char *start;
642 CGEN_INSN_LIST *ilist;
643 const char *parse_errmsg = NULL;
644 const char *insert_errmsg = NULL;
645 int recognized_mnemonic = 0;
646
647 /* Skip leading white space. */
648 while (ISSPACE (* str))
649 ++ str;
650
651 /* The instructions are stored in hashed lists.
652 Get the first in the list. */
653 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
654
655 /* Keep looking until we find a match. */
656 start = str;
657 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
658 {
659 const CGEN_INSN *insn = ilist->insn;
660 recognized_mnemonic = 1;
661
662#ifdef CGEN_VALIDATE_INSN_SUPPORTED
663 /* Not usually needed as unsupported opcodes
664 shouldn't be in the hash lists. */
665 /* Is this insn supported by the selected cpu? */
666 if (! m32r_cgen_insn_supported (cd, insn))
667 continue;
668#endif
669 /* If the RELAXED attribute is set, this is an insn that shouldn't be
670 chosen immediately. Instead, it is used during assembler/linker
671 relaxation if possible. */
672 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
673 continue;
674
675 str = start;
676
677 /* Skip this insn if str doesn't look right lexically. */
678 if (CGEN_INSN_RX (insn) != NULL &&
679 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
680 continue;
681
682 /* Allow parse/insert handlers to obtain length of insn. */
683 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
684
685 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
686 if (parse_errmsg != NULL)
687 continue;
688
689 /* ??? 0 is passed for `pc'. */
690 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
691 (bfd_vma) 0);
692 if (insert_errmsg != NULL)
693 continue;
694
695 /* It is up to the caller to actually output the insn and any
696 queued relocs. */
697 return insn;
698 }
699
700 {
701 static char errbuf[150];
702 const char *tmp_errmsg;
703#ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
704#define be_verbose 1
705#else
706#define be_verbose 0
707#endif
708
709 if (be_verbose)
710 {
711 /* If requesting verbose error messages, use insert_errmsg.
712 Failing that, use parse_errmsg. */
713 tmp_errmsg = (insert_errmsg ? insert_errmsg :
714 parse_errmsg ? parse_errmsg :
715 recognized_mnemonic ?
716 _("unrecognized form of instruction") :
717 _("unrecognized instruction"));
718
719 if (strlen (start) > 50)
720 /* xgettext:c-format */
721 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
722 else
723 /* xgettext:c-format */
724 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
725 }
726 else
727 {
728 if (strlen (start) > 50)
729 /* xgettext:c-format */
730 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
731 else
732 /* xgettext:c-format */
733 sprintf (errbuf, _("bad instruction `%.50s'"), start);
734 }
735
736 *errmsg = errbuf;
737 return NULL;
738 }
739}
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