1 /* Assembler interface for targets using CGEN. -*- C -*-
2 CGEN: Cpu tools GENerator
3
4 THIS FILE IS MACHINE GENERATED WITH CGEN.
5 - the resultant file is machine generated, cgen-asm.in isn't
6
7 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2005
8 Free Software Foundation, Inc.
9
10 This file is part of the GNU Binutils and GDB, the GNU debugger.
11
12 This program 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 2, or (at your option)
15 any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public 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 /* ??? 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
46 static const char * parse_insn_normal
47 (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
48
49 /* -- assembler routines inserted here. */
50
51 /* -- asm.c */
52 static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'");
53
54 /* Handle '#' prefixes (i.e. skip over them). */
55
56 static const char *
parse_hash(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,const char ** strp,int opindex ATTRIBUTE_UNUSED,long * valuep ATTRIBUTE_UNUSED)57 parse_hash (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
58 const char **strp,
59 int opindex ATTRIBUTE_UNUSED,
60 long *valuep ATTRIBUTE_UNUSED)
61 {
62 if (**strp == '#')
63 ++*strp;
64 return NULL;
65 }
66
67 /* Handle shigh(), high(). */
68
69 static const char *
parse_hi16(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)70 parse_hi16 (CGEN_CPU_DESC cd,
71 const char **strp,
72 int opindex,
73 unsigned long *valuep)
74 {
75 const char *errmsg;
76 enum cgen_parse_operand_result result_type;
77 bfd_vma value;
78
79 if (**strp == '#')
80 ++*strp;
81
82 if (strncasecmp (*strp, "high(", 5) == 0)
83 {
84 *strp += 5;
85 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_HI16_ULO,
86 & result_type, & value);
87 if (**strp != ')')
88 return MISSING_CLOSING_PARENTHESIS;
89 ++*strp;
90 if (errmsg == NULL
91 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
92 {
93 value >>= 16;
94 value &= 0xffff;
95 }
96 *valuep = value;
97 return errmsg;
98 }
99 else if (strncasecmp (*strp, "shigh(", 6) == 0)
100 {
101 *strp += 6;
102 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_HI16_SLO,
103 & result_type, & value);
104 if (**strp != ')')
105 return MISSING_CLOSING_PARENTHESIS;
106 ++*strp;
107 if (errmsg == NULL
108 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
109 {
110 value += 0x8000;
111 value >>= 16;
112 value &= 0xffff;
113 }
114 *valuep = value;
115 return errmsg;
116 }
117
118 return cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
119 }
120
121 /* Handle low() in a signed context. Also handle sda().
122 The signedness of the value doesn't matter to low(), but this also
123 handles the case where low() isn't present. */
124
125 static const char *
parse_slo16(CGEN_CPU_DESC cd,const char ** strp,int opindex,long * valuep)126 parse_slo16 (CGEN_CPU_DESC cd,
127 const char ** strp,
128 int opindex,
129 long * valuep)
130 {
131 const char *errmsg;
132 enum cgen_parse_operand_result result_type;
133 bfd_vma value;
134
135 if (**strp == '#')
136 ++*strp;
137
138 if (strncasecmp (*strp, "low(", 4) == 0)
139 {
140 *strp += 4;
141 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_LO16,
142 & result_type, & value);
143 if (**strp != ')')
144 return MISSING_CLOSING_PARENTHESIS;
145 ++*strp;
146 if (errmsg == NULL
147 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
148 value = ((value & 0xffff) ^ 0x8000) - 0x8000;
149 *valuep = value;
150 return errmsg;
151 }
152
153 if (strncasecmp (*strp, "sda(", 4) == 0)
154 {
155 *strp += 4;
156 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_SDA16,
157 NULL, & value);
158 if (**strp != ')')
159 return MISSING_CLOSING_PARENTHESIS;
160 ++*strp;
161 *valuep = value;
162 return errmsg;
163 }
164
165 return cgen_parse_signed_integer (cd, strp, opindex, valuep);
166 }
167
168 /* Handle low() in an unsigned context.
169 The signedness of the value doesn't matter to low(), but this also
170 handles the case where low() isn't present. */
171
172 static const char *
parse_ulo16(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)173 parse_ulo16 (CGEN_CPU_DESC cd,
174 const char **strp,
175 int opindex,
176 unsigned long *valuep)
177 {
178 const char *errmsg;
179 enum cgen_parse_operand_result result_type;
180 bfd_vma value;
181
182 if (**strp == '#')
183 ++*strp;
184
185 if (strncasecmp (*strp, "low(", 4) == 0)
186 {
187 *strp += 4;
188 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_LO16,
189 & result_type, & value);
190 if (**strp != ')')
191 return MISSING_CLOSING_PARENTHESIS;
192 ++*strp;
193 if (errmsg == NULL
194 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
195 value &= 0xffff;
196 *valuep = value;
197 return errmsg;
198 }
199
200 return cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
201 }
202
203 /* -- */
204
205 const char * m32r_cgen_parse_operand
206 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
207
208 /* Main entry point for operand parsing.
209
210 This function is basically just a big switch statement. Earlier versions
211 used tables to look up the function to use, but
212 - if the table contains both assembler and disassembler functions then
213 the disassembler contains much of the assembler and vice-versa,
214 - there's a lot of inlining possibilities as things grow,
215 - using a switch statement avoids the function call overhead.
216
217 This function could be moved into `parse_insn_normal', but keeping it
218 separate makes clear the interface between `parse_insn_normal' and each of
219 the handlers. */
220
221 const char *
m32r_cgen_parse_operand(CGEN_CPU_DESC cd,int opindex,const char ** strp,CGEN_FIELDS * fields)222 m32r_cgen_parse_operand (CGEN_CPU_DESC cd,
223 int opindex,
224 const char ** strp,
225 CGEN_FIELDS * fields)
226 {
227 const char * errmsg = NULL;
228 /* Used by scalar operands that still need to be parsed. */
229 long junk ATTRIBUTE_UNUSED;
230
231 switch (opindex)
232 {
233 case M32R_OPERAND_ACC :
234 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_acc);
235 break;
236 case M32R_OPERAND_ACCD :
237 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_accd);
238 break;
239 case M32R_OPERAND_ACCS :
240 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_accs);
241 break;
242 case M32R_OPERAND_DCR :
243 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_cr_names, & fields->f_r1);
244 break;
245 case M32R_OPERAND_DISP16 :
246 {
247 bfd_vma value = 0;
248 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP16, 0, NULL, & value);
249 fields->f_disp16 = value;
250 }
251 break;
252 case M32R_OPERAND_DISP24 :
253 {
254 bfd_vma value = 0;
255 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP24, 0, NULL, & value);
256 fields->f_disp24 = value;
257 }
258 break;
259 case M32R_OPERAND_DISP8 :
260 {
261 bfd_vma value = 0;
262 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP8, 0, NULL, & value);
263 fields->f_disp8 = value;
264 }
265 break;
266 case M32R_OPERAND_DR :
267 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r1);
268 break;
269 case M32R_OPERAND_HASH :
270 errmsg = parse_hash (cd, strp, M32R_OPERAND_HASH, (long *) (& junk));
271 break;
272 case M32R_OPERAND_HI16 :
273 errmsg = parse_hi16 (cd, strp, M32R_OPERAND_HI16, (unsigned long *) (& fields->f_hi16));
274 break;
275 case M32R_OPERAND_IMM1 :
276 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_IMM1, (unsigned long *) (& fields->f_imm1));
277 break;
278 case M32R_OPERAND_SCR :
279 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_cr_names, & fields->f_r2);
280 break;
281 case M32R_OPERAND_SIMM16 :
282 errmsg = cgen_parse_signed_integer (cd, strp, M32R_OPERAND_SIMM16, (long *) (& fields->f_simm16));
283 break;
284 case M32R_OPERAND_SIMM8 :
285 errmsg = cgen_parse_signed_integer (cd, strp, M32R_OPERAND_SIMM8, (long *) (& fields->f_simm8));
286 break;
287 case M32R_OPERAND_SLO16 :
288 errmsg = parse_slo16 (cd, strp, M32R_OPERAND_SLO16, (long *) (& fields->f_simm16));
289 break;
290 case M32R_OPERAND_SR :
291 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r2);
292 break;
293 case M32R_OPERAND_SRC1 :
294 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r1);
295 break;
296 case M32R_OPERAND_SRC2 :
297 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r2);
298 break;
299 case M32R_OPERAND_UIMM16 :
300 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM16, (unsigned long *) (& fields->f_uimm16));
301 break;
302 case M32R_OPERAND_UIMM24 :
303 {
304 bfd_vma value = 0;
305 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_UIMM24, 0, NULL, & value);
306 fields->f_uimm24 = value;
307 }
308 break;
309 case M32R_OPERAND_UIMM3 :
310 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM3, (unsigned long *) (& fields->f_uimm3));
311 break;
312 case M32R_OPERAND_UIMM4 :
313 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM4, (unsigned long *) (& fields->f_uimm4));
314 break;
315 case M32R_OPERAND_UIMM5 :
316 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM5, (unsigned long *) (& fields->f_uimm5));
317 break;
318 case M32R_OPERAND_UIMM8 :
319 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM8, (unsigned long *) (& fields->f_uimm8));
320 break;
321 case M32R_OPERAND_ULO16 :
322 errmsg = parse_ulo16 (cd, strp, M32R_OPERAND_ULO16, (unsigned long *) (& fields->f_uimm16));
323 break;
324
325 default :
326 /* xgettext:c-format */
327 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
328 abort ();
329 }
330
331 return errmsg;
332 }
333
334 cgen_parse_fn * const m32r_cgen_parse_handlers[] =
335 {
336 parse_insn_normal,
337 };
338
339 void
m32r_cgen_init_asm(CGEN_CPU_DESC cd)340 m32r_cgen_init_asm (CGEN_CPU_DESC cd)
341 {
342 m32r_cgen_init_opcode_table (cd);
343 m32r_cgen_init_ibld_table (cd);
344 cd->parse_handlers = & m32r_cgen_parse_handlers[0];
345 cd->parse_operand = m32r_cgen_parse_operand;
346 }
347
348
349
350 /* Regex construction routine.
351
352 This translates an opcode syntax string into a regex string,
353 by replacing any non-character syntax element (such as an
354 opcode) with the pattern '.*'
355
356 It then compiles the regex and stores it in the opcode, for
357 later use by m32r_cgen_assemble_insn
358
359 Returns NULL for success, an error message for failure. */
360
361 char *
m32r_cgen_build_insn_regex(CGEN_INSN * insn)362 m32r_cgen_build_insn_regex (CGEN_INSN *insn)
363 {
364 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
365 const char *mnem = CGEN_INSN_MNEMONIC (insn);
366 char rxbuf[CGEN_MAX_RX_ELEMENTS];
367 char *rx = rxbuf;
368 const CGEN_SYNTAX_CHAR_TYPE *syn;
369 int reg_err;
370
371 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
372
373 /* Mnemonics come first in the syntax string. */
374 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
375 return _("missing mnemonic in syntax string");
376 ++syn;
377
378 /* Generate a case sensitive regular expression that emulates case
379 insensitive matching in the "C" locale. We cannot generate a case
380 insensitive regular expression because in Turkish locales, 'i' and 'I'
381 are not equal modulo case conversion. */
382
383 /* Copy the literal mnemonic out of the insn. */
384 for (; *mnem; mnem++)
385 {
386 char c = *mnem;
387
388 if (ISALPHA (c))
389 {
390 *rx++ = '[';
391 *rx++ = TOLOWER (c);
392 *rx++ = TOUPPER (c);
393 *rx++ = ']';
394 }
395 else
396 *rx++ = c;
397 }
398
399 /* Copy any remaining literals from the syntax string into the rx. */
400 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
401 {
402 if (CGEN_SYNTAX_CHAR_P (* syn))
403 {
404 char c = CGEN_SYNTAX_CHAR (* syn);
405
406 switch (c)
407 {
408 /* Escape any regex metacharacters in the syntax. */
409 case '.': case '[': case '\\':
410 case '*': case '^': case '$':
411
412 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
413 case '?': case '{': case '}':
414 case '(': case ')': case '*':
415 case '|': case '+': case ']':
416 #endif
417 *rx++ = '\\';
418 *rx++ = c;
419 break;
420
421 default:
422 if (ISALPHA (c))
423 {
424 *rx++ = '[';
425 *rx++ = TOLOWER (c);
426 *rx++ = TOUPPER (c);
427 *rx++ = ']';
428 }
429 else
430 *rx++ = c;
431 break;
432 }
433 }
434 else
435 {
436 /* Replace non-syntax fields with globs. */
437 *rx++ = '.';
438 *rx++ = '*';
439 }
440 }
441
442 /* Trailing whitespace ok. */
443 * rx++ = '[';
444 * rx++ = ' ';
445 * rx++ = '\t';
446 * rx++ = ']';
447 * rx++ = '*';
448
449 /* But anchor it after that. */
450 * rx++ = '$';
451 * rx = '\0';
452
453 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
454 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
455
456 if (reg_err == 0)
457 return NULL;
458 else
459 {
460 static char msg[80];
461
462 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
463 regfree ((regex_t *) CGEN_INSN_RX (insn));
464 free (CGEN_INSN_RX (insn));
465 (CGEN_INSN_RX (insn)) = NULL;
466 return msg;
467 }
468 }
469
470
471 /* Default insn parser.
472
473 The syntax string is scanned and operands are parsed and stored in FIELDS.
474 Relocs are queued as we go via other callbacks.
475
476 ??? Note that this is currently an all-or-nothing parser. If we fail to
477 parse the instruction, we return 0 and the caller will start over from
478 the beginning. Backtracking will be necessary in parsing subexpressions,
479 but that can be handled there. Not handling backtracking here may get
480 expensive in the case of the m68k. Deal with later.
481
482 Returns NULL for success, an error message for failure. */
483
484 static const char *
parse_insn_normal(CGEN_CPU_DESC cd,const CGEN_INSN * insn,const char ** strp,CGEN_FIELDS * fields)485 parse_insn_normal (CGEN_CPU_DESC cd,
486 const CGEN_INSN *insn,
487 const char **strp,
488 CGEN_FIELDS *fields)
489 {
490 /* ??? Runtime added insns not handled yet. */
491 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
492 const char *str = *strp;
493 const char *errmsg;
494 const char *p;
495 const CGEN_SYNTAX_CHAR_TYPE * syn;
496 #ifdef CGEN_MNEMONIC_OPERANDS
497 /* FIXME: wip */
498 int past_opcode_p;
499 #endif
500
501 /* For now we assume the mnemonic is first (there are no leading operands).
502 We can parse it without needing to set up operand parsing.
503 GAS's input scrubber will ensure mnemonics are lowercase, but we may
504 not be called from GAS. */
505 p = CGEN_INSN_MNEMONIC (insn);
506 while (*p && TOLOWER (*p) == TOLOWER (*str))
507 ++p, ++str;
508
509 if (* p)
510 return _("unrecognized instruction");
511
512 #ifndef CGEN_MNEMONIC_OPERANDS
513 if (* str && ! ISSPACE (* str))
514 return _("unrecognized instruction");
515 #endif
516
517 CGEN_INIT_PARSE (cd);
518 cgen_init_parse_operand (cd);
519 #ifdef CGEN_MNEMONIC_OPERANDS
520 past_opcode_p = 0;
521 #endif
522
523 /* We don't check for (*str != '\0') here because we want to parse
524 any trailing fake arguments in the syntax string. */
525 syn = CGEN_SYNTAX_STRING (syntax);
526
527 /* Mnemonics come first for now, ensure valid string. */
528 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
529 abort ();
530
531 ++syn;
532
533 while (* syn != 0)
534 {
535 /* Non operand chars must match exactly. */
536 if (CGEN_SYNTAX_CHAR_P (* syn))
537 {
538 /* FIXME: While we allow for non-GAS callers above, we assume the
539 first char after the mnemonic part is a space. */
540 /* FIXME: We also take inappropriate advantage of the fact that
541 GAS's input scrubber will remove extraneous blanks. */
542 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
543 {
544 #ifdef CGEN_MNEMONIC_OPERANDS
545 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
546 past_opcode_p = 1;
547 #endif
548 ++ syn;
549 ++ str;
550 }
551 else if (*str)
552 {
553 /* Syntax char didn't match. Can't be this insn. */
554 static char msg [80];
555
556 /* xgettext:c-format */
557 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
558 CGEN_SYNTAX_CHAR(*syn), *str);
559 return msg;
560 }
561 else
562 {
563 /* Ran out of input. */
564 static char msg [80];
565
566 /* xgettext:c-format */
567 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
568 CGEN_SYNTAX_CHAR(*syn));
569 return msg;
570 }
571 continue;
572 }
573
574 /* We have an operand of some sort. */
575 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
576 &str, fields);
577 if (errmsg)
578 return errmsg;
579
580 /* Done with this operand, continue with next one. */
581 ++ syn;
582 }
583
584 /* If we're at the end of the syntax string, we're done. */
585 if (* syn == 0)
586 {
587 /* FIXME: For the moment we assume a valid `str' can only contain
588 blanks now. IE: We needn't try again with a longer version of
589 the insn and it is assumed that longer versions of insns appear
590 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
591 while (ISSPACE (* str))
592 ++ str;
593
594 if (* str != '\0')
595 return _("junk at end of line"); /* FIXME: would like to include `str' */
596
597 return NULL;
598 }
599
600 /* We couldn't parse it. */
601 return _("unrecognized instruction");
602 }
603
604 /* Main entry point.
605 This routine is called for each instruction to be assembled.
606 STR points to the insn to be assembled.
607 We assume all necessary tables have been initialized.
608 The assembled instruction, less any fixups, is stored in BUF.
609 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
610 still needs to be converted to target byte order, otherwise BUF is an array
611 of bytes in target byte order.
612 The result is a pointer to the insn's entry in the opcode table,
613 or NULL if an error occured (an error message will have already been
614 printed).
615
616 Note that when processing (non-alias) macro-insns,
617 this function recurses.
618
619 ??? It's possible to make this cpu-independent.
620 One would have to deal with a few minor things.
621 At this point in time doing so would be more of a curiosity than useful
622 [for example this file isn't _that_ big], but keeping the possibility in
623 mind helps keep the design clean. */
624
625 const CGEN_INSN *
m32r_cgen_assemble_insn(CGEN_CPU_DESC cd,const char * str,CGEN_FIELDS * fields,CGEN_INSN_BYTES_PTR buf,char ** errmsg)626 m32r_cgen_assemble_insn (CGEN_CPU_DESC cd,
627 const char *str,
628 CGEN_FIELDS *fields,
629 CGEN_INSN_BYTES_PTR buf,
630 char **errmsg)
631 {
632 const char *start;
633 CGEN_INSN_LIST *ilist;
634 const char *parse_errmsg = NULL;
635 const char *insert_errmsg = NULL;
636 int recognized_mnemonic = 0;
637
638 /* Skip leading white space. */
639 while (ISSPACE (* str))
640 ++ str;
641
642 /* The instructions are stored in hashed lists.
643 Get the first in the list. */
644 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
645
646 /* Keep looking until we find a match. */
647 start = str;
648 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
649 {
650 const CGEN_INSN *insn = ilist->insn;
651 recognized_mnemonic = 1;
652
653 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
654 /* Not usually needed as unsupported opcodes
655 shouldn't be in the hash lists. */
656 /* Is this insn supported by the selected cpu? */
657 if (! m32r_cgen_insn_supported (cd, insn))
658 continue;
659 #endif
660 /* If the RELAXED attribute is set, this is an insn that shouldn't be
661 chosen immediately. Instead, it is used during assembler/linker
662 relaxation if possible. */
663 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
664 continue;
665
666 str = start;
667
668 /* Skip this insn if str doesn't look right lexically. */
669 if (CGEN_INSN_RX (insn) != NULL &&
670 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
671 continue;
672
673 /* Allow parse/insert handlers to obtain length of insn. */
674 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
675
676 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
677 if (parse_errmsg != NULL)
678 continue;
679
680 /* ??? 0 is passed for `pc'. */
681 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
682 (bfd_vma) 0);
683 if (insert_errmsg != NULL)
684 continue;
685
686 /* It is up to the caller to actually output the insn and any
687 queued relocs. */
688 return insn;
689 }
690
691 {
692 static char errbuf[150];
693 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
694 const char *tmp_errmsg;
695
696 /* If requesting verbose error messages, use insert_errmsg.
697 Failing that, use parse_errmsg. */
698 tmp_errmsg = (insert_errmsg ? insert_errmsg :
699 parse_errmsg ? parse_errmsg :
700 recognized_mnemonic ?
701 _("unrecognized form of instruction") :
702 _("unrecognized instruction"));
703
704 if (strlen (start) > 50)
705 /* xgettext:c-format */
706 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
707 else
708 /* xgettext:c-format */
709 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
710 #else
711 if (strlen (start) > 50)
712 /* xgettext:c-format */
713 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
714 else
715 /* xgettext:c-format */
716 sprintf (errbuf, _("bad instruction `%.50s'"), start);
717 #endif
718
719 *errmsg = errbuf;
720 return NULL;
721 }
722 }
723