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, 2007, 2008, 2010
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 "lm32-desc.h"
36 #include "lm32-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
54 /* Handle signed/unsigned literal. */
55
56 static const char *
parse_imm(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)57 parse_imm (CGEN_CPU_DESC cd,
58 const char **strp,
59 int opindex,
60 unsigned long *valuep)
61 {
62 const char *errmsg;
63 signed long value;
64
65 errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
66 if (errmsg == NULL)
67 {
68 unsigned long x = value & 0xFFFF0000;
69 if (x != 0 && x != 0xFFFF0000)
70 errmsg = _("immediate value out of range");
71 else
72 *valuep = (value & 0xFFFF);
73 }
74 return errmsg;
75 }
76
77 /* Handle hi() */
78
79 static const char *
parse_hi16(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)80 parse_hi16 (CGEN_CPU_DESC cd,
81 const char **strp,
82 int opindex,
83 unsigned long *valuep)
84 {
85 if (strncasecmp (*strp, "hi(", 3) == 0)
86 {
87 enum cgen_parse_operand_result result_type;
88 bfd_vma value;
89 const char *errmsg;
90
91 *strp += 3;
92 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16,
93 &result_type, &value);
94 if (**strp != ')')
95 return _("missing `)'");
96
97 ++*strp;
98 if (errmsg == NULL
99 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
100 value = (value >> 16) & 0xffff;
101 *valuep = value;
102
103 return errmsg;
104 }
105
106 return parse_imm (cd, strp, opindex, valuep);
107 }
108
109 /* Handle lo() */
110
111 static const char *
parse_lo16(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)112 parse_lo16 (CGEN_CPU_DESC cd,
113 const char **strp,
114 int opindex,
115 unsigned long *valuep)
116 {
117 if (strncasecmp (*strp, "lo(", 3) == 0)
118 {
119 const char *errmsg;
120 enum cgen_parse_operand_result result_type;
121 bfd_vma value;
122
123 *strp += 3;
124 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
125 &result_type, &value);
126 if (**strp != ')')
127 return _("missing `)'");
128 ++*strp;
129 if (errmsg == NULL
130 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
131 value &= 0xffff;
132 *valuep = value;
133 return errmsg;
134 }
135
136 return parse_imm (cd, strp, opindex, valuep);
137 }
138
139 /* Handle gp() */
140
141 static const char *
parse_gp16(CGEN_CPU_DESC cd,const char ** strp,int opindex,long * valuep)142 parse_gp16 (CGEN_CPU_DESC cd,
143 const char **strp,
144 int opindex,
145 long *valuep)
146 {
147 if (strncasecmp (*strp, "gp(", 3) == 0)
148 {
149 const char *errmsg;
150 enum cgen_parse_operand_result result_type;
151 bfd_vma value;
152
153 *strp += 3;
154 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_GPREL16,
155 & result_type, & value);
156 if (**strp != ')')
157 return _("missing `)'");
158 ++*strp;
159 if (errmsg == NULL
160 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
161 value &= 0xffff;
162 *valuep = value;
163 return errmsg;
164 }
165
166 return _("expecting gp relative address: gp(symbol)");
167 }
168
169 /* Handle got() */
170
171 static const char *
parse_got16(CGEN_CPU_DESC cd,const char ** strp,int opindex,long * valuep)172 parse_got16 (CGEN_CPU_DESC cd,
173 const char **strp,
174 int opindex,
175 long *valuep)
176 {
177 if (strncasecmp (*strp, "got(", 4) == 0)
178 {
179 const char *errmsg;
180 enum cgen_parse_operand_result result_type;
181 bfd_vma value;
182
183 *strp += 4;
184 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LM32_16_GOT,
185 & result_type, & value);
186 if (**strp != ')')
187 return _("missing `)'");
188 ++*strp;
189 if (errmsg == NULL
190 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
191 value &= 0xffff;
192 *valuep = value;
193 return errmsg;
194 }
195
196 return _("expecting got relative address: got(symbol)");
197 }
198
199 /* Handle gotoffhi16() */
200
201 static const char *
parse_gotoff_hi16(CGEN_CPU_DESC cd,const char ** strp,int opindex,long * valuep)202 parse_gotoff_hi16 (CGEN_CPU_DESC cd,
203 const char **strp,
204 int opindex,
205 long *valuep)
206 {
207 if (strncasecmp (*strp, "gotoffhi16(", 11) == 0)
208 {
209 const char *errmsg;
210 enum cgen_parse_operand_result result_type;
211 bfd_vma value;
212
213 *strp += 11;
214 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LM32_GOTOFF_HI16,
215 & result_type, & value);
216 if (**strp != ')')
217 return _("missing `)'");
218 ++*strp;
219 if (errmsg == NULL
220 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
221 value &= 0xffff;
222 *valuep = value;
223 return errmsg;
224 }
225
226 return _("expecting got relative address: gotoffhi16(symbol)");
227 }
228
229 /* Handle gotofflo16() */
230
231 static const char *
parse_gotoff_lo16(CGEN_CPU_DESC cd,const char ** strp,int opindex,long * valuep)232 parse_gotoff_lo16 (CGEN_CPU_DESC cd,
233 const char **strp,
234 int opindex,
235 long *valuep)
236 {
237 if (strncasecmp (*strp, "gotofflo16(", 11) == 0)
238 {
239 const char *errmsg;
240 enum cgen_parse_operand_result result_type;
241 bfd_vma value;
242
243 *strp += 11;
244 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LM32_GOTOFF_LO16,
245 &result_type, &value);
246 if (**strp != ')')
247 return _("missing `)'");
248 ++*strp;
249 if (errmsg == NULL
250 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
251 value &= 0xffff;
252 *valuep = value;
253 return errmsg;
254 }
255
256 return _("expecting got relative address: gotofflo16(symbol)");
257 }
258
259 const char * lm32_cgen_parse_operand
260 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
261
262 /* Main entry point for operand parsing.
263
264 This function is basically just a big switch statement. Earlier versions
265 used tables to look up the function to use, but
266 - if the table contains both assembler and disassembler functions then
267 the disassembler contains much of the assembler and vice-versa,
268 - there's a lot of inlining possibilities as things grow,
269 - using a switch statement avoids the function call overhead.
270
271 This function could be moved into `parse_insn_normal', but keeping it
272 separate makes clear the interface between `parse_insn_normal' and each of
273 the handlers. */
274
275 const char *
lm32_cgen_parse_operand(CGEN_CPU_DESC cd,int opindex,const char ** strp,CGEN_FIELDS * fields)276 lm32_cgen_parse_operand (CGEN_CPU_DESC cd,
277 int opindex,
278 const char ** strp,
279 CGEN_FIELDS * fields)
280 {
281 const char * errmsg = NULL;
282 /* Used by scalar operands that still need to be parsed. */
283 long junk ATTRIBUTE_UNUSED;
284
285 switch (opindex)
286 {
287 case LM32_OPERAND_BRANCH :
288 {
289 bfd_vma value = 0;
290 errmsg = cgen_parse_address (cd, strp, LM32_OPERAND_BRANCH, 0, NULL, & value);
291 fields->f_branch = value;
292 }
293 break;
294 case LM32_OPERAND_CALL :
295 {
296 bfd_vma value = 0;
297 errmsg = cgen_parse_address (cd, strp, LM32_OPERAND_CALL, 0, NULL, & value);
298 fields->f_call = value;
299 }
300 break;
301 case LM32_OPERAND_CSR :
302 errmsg = cgen_parse_keyword (cd, strp, & lm32_cgen_opval_h_csr, & fields->f_csr);
303 break;
304 case LM32_OPERAND_EXCEPTION :
305 errmsg = cgen_parse_unsigned_integer (cd, strp, LM32_OPERAND_EXCEPTION, (unsigned long *) (& fields->f_exception));
306 break;
307 case LM32_OPERAND_GOT16 :
308 errmsg = parse_got16 (cd, strp, LM32_OPERAND_GOT16, (long *) (& fields->f_imm));
309 break;
310 case LM32_OPERAND_GOTOFFHI16 :
311 errmsg = parse_gotoff_hi16 (cd, strp, LM32_OPERAND_GOTOFFHI16, (long *) (& fields->f_imm));
312 break;
313 case LM32_OPERAND_GOTOFFLO16 :
314 errmsg = parse_gotoff_lo16 (cd, strp, LM32_OPERAND_GOTOFFLO16, (long *) (& fields->f_imm));
315 break;
316 case LM32_OPERAND_GP16 :
317 errmsg = parse_gp16 (cd, strp, LM32_OPERAND_GP16, (long *) (& fields->f_imm));
318 break;
319 case LM32_OPERAND_HI16 :
320 errmsg = parse_hi16 (cd, strp, LM32_OPERAND_HI16, (unsigned long *) (& fields->f_uimm));
321 break;
322 case LM32_OPERAND_IMM :
323 errmsg = cgen_parse_signed_integer (cd, strp, LM32_OPERAND_IMM, (long *) (& fields->f_imm));
324 break;
325 case LM32_OPERAND_LO16 :
326 errmsg = parse_lo16 (cd, strp, LM32_OPERAND_LO16, (unsigned long *) (& fields->f_uimm));
327 break;
328 case LM32_OPERAND_R0 :
329 errmsg = cgen_parse_keyword (cd, strp, & lm32_cgen_opval_h_gr, & fields->f_r0);
330 break;
331 case LM32_OPERAND_R1 :
332 errmsg = cgen_parse_keyword (cd, strp, & lm32_cgen_opval_h_gr, & fields->f_r1);
333 break;
334 case LM32_OPERAND_R2 :
335 errmsg = cgen_parse_keyword (cd, strp, & lm32_cgen_opval_h_gr, & fields->f_r2);
336 break;
337 case LM32_OPERAND_SHIFT :
338 errmsg = cgen_parse_unsigned_integer (cd, strp, LM32_OPERAND_SHIFT, (unsigned long *) (& fields->f_shift));
339 break;
340 case LM32_OPERAND_UIMM :
341 errmsg = cgen_parse_unsigned_integer (cd, strp, LM32_OPERAND_UIMM, (unsigned long *) (& fields->f_uimm));
342 break;
343 case LM32_OPERAND_USER :
344 errmsg = cgen_parse_unsigned_integer (cd, strp, LM32_OPERAND_USER, (unsigned long *) (& fields->f_user));
345 break;
346
347 default :
348 /* xgettext:c-format */
349 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
350 abort ();
351 }
352
353 return errmsg;
354 }
355
356 cgen_parse_fn * const lm32_cgen_parse_handlers[] =
357 {
358 parse_insn_normal,
359 };
360
361 void
lm32_cgen_init_asm(CGEN_CPU_DESC cd)362 lm32_cgen_init_asm (CGEN_CPU_DESC cd)
363 {
364 lm32_cgen_init_opcode_table (cd);
365 lm32_cgen_init_ibld_table (cd);
366 cd->parse_handlers = & lm32_cgen_parse_handlers[0];
367 cd->parse_operand = lm32_cgen_parse_operand;
368 #ifdef CGEN_ASM_INIT_HOOK
369 CGEN_ASM_INIT_HOOK
370 #endif
371 }
372
373
374
375 /* Regex construction routine.
376
377 This translates an opcode syntax string into a regex string,
378 by replacing any non-character syntax element (such as an
379 opcode) with the pattern '.*'
380
381 It then compiles the regex and stores it in the opcode, for
382 later use by lm32_cgen_assemble_insn
383
384 Returns NULL for success, an error message for failure. */
385
386 char *
lm32_cgen_build_insn_regex(CGEN_INSN * insn)387 lm32_cgen_build_insn_regex (CGEN_INSN *insn)
388 {
389 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
390 const char *mnem = CGEN_INSN_MNEMONIC (insn);
391 char rxbuf[CGEN_MAX_RX_ELEMENTS];
392 char *rx = rxbuf;
393 const CGEN_SYNTAX_CHAR_TYPE *syn;
394 int reg_err;
395
396 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
397
398 /* Mnemonics come first in the syntax string. */
399 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
400 return _("missing mnemonic in syntax string");
401 ++syn;
402
403 /* Generate a case sensitive regular expression that emulates case
404 insensitive matching in the "C" locale. We cannot generate a case
405 insensitive regular expression because in Turkish locales, 'i' and 'I'
406 are not equal modulo case conversion. */
407
408 /* Copy the literal mnemonic out of the insn. */
409 for (; *mnem; mnem++)
410 {
411 char c = *mnem;
412
413 if (ISALPHA (c))
414 {
415 *rx++ = '[';
416 *rx++ = TOLOWER (c);
417 *rx++ = TOUPPER (c);
418 *rx++ = ']';
419 }
420 else
421 *rx++ = c;
422 }
423
424 /* Copy any remaining literals from the syntax string into the rx. */
425 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
426 {
427 if (CGEN_SYNTAX_CHAR_P (* syn))
428 {
429 char c = CGEN_SYNTAX_CHAR (* syn);
430
431 switch (c)
432 {
433 /* Escape any regex metacharacters in the syntax. */
434 case '.': case '[': case '\\':
435 case '*': case '^': case '$':
436
437 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
438 case '?': case '{': case '}':
439 case '(': case ')': case '*':
440 case '|': case '+': case ']':
441 #endif
442 *rx++ = '\\';
443 *rx++ = c;
444 break;
445
446 default:
447 if (ISALPHA (c))
448 {
449 *rx++ = '[';
450 *rx++ = TOLOWER (c);
451 *rx++ = TOUPPER (c);
452 *rx++ = ']';
453 }
454 else
455 *rx++ = c;
456 break;
457 }
458 }
459 else
460 {
461 /* Replace non-syntax fields with globs. */
462 *rx++ = '.';
463 *rx++ = '*';
464 }
465 }
466
467 /* Trailing whitespace ok. */
468 * rx++ = '[';
469 * rx++ = ' ';
470 * rx++ = '\t';
471 * rx++ = ']';
472 * rx++ = '*';
473
474 /* But anchor it after that. */
475 * rx++ = '$';
476 * rx = '\0';
477
478 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
479 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
480
481 if (reg_err == 0)
482 return NULL;
483 else
484 {
485 static char msg[80];
486
487 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
488 regfree ((regex_t *) CGEN_INSN_RX (insn));
489 free (CGEN_INSN_RX (insn));
490 (CGEN_INSN_RX (insn)) = NULL;
491 return msg;
492 }
493 }
494
495
496 /* Default insn parser.
497
498 The syntax string is scanned and operands are parsed and stored in FIELDS.
499 Relocs are queued as we go via other callbacks.
500
501 ??? Note that this is currently an all-or-nothing parser. If we fail to
502 parse the instruction, we return 0 and the caller will start over from
503 the beginning. Backtracking will be necessary in parsing subexpressions,
504 but that can be handled there. Not handling backtracking here may get
505 expensive in the case of the m68k. Deal with later.
506
507 Returns NULL for success, an error message for failure. */
508
509 static const char *
parse_insn_normal(CGEN_CPU_DESC cd,const CGEN_INSN * insn,const char ** strp,CGEN_FIELDS * fields)510 parse_insn_normal (CGEN_CPU_DESC cd,
511 const CGEN_INSN *insn,
512 const char **strp,
513 CGEN_FIELDS *fields)
514 {
515 /* ??? Runtime added insns not handled yet. */
516 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
517 const char *str = *strp;
518 const char *errmsg;
519 const char *p;
520 const CGEN_SYNTAX_CHAR_TYPE * syn;
521 #ifdef CGEN_MNEMONIC_OPERANDS
522 /* FIXME: wip */
523 int past_opcode_p;
524 #endif
525
526 /* For now we assume the mnemonic is first (there are no leading operands).
527 We can parse it without needing to set up operand parsing.
528 GAS's input scrubber will ensure mnemonics are lowercase, but we may
529 not be called from GAS. */
530 p = CGEN_INSN_MNEMONIC (insn);
531 while (*p && TOLOWER (*p) == TOLOWER (*str))
532 ++p, ++str;
533
534 if (* p)
535 return _("unrecognized instruction");
536
537 #ifndef CGEN_MNEMONIC_OPERANDS
538 if (* str && ! ISSPACE (* str))
539 return _("unrecognized instruction");
540 #endif
541
542 CGEN_INIT_PARSE (cd);
543 cgen_init_parse_operand (cd);
544 #ifdef CGEN_MNEMONIC_OPERANDS
545 past_opcode_p = 0;
546 #endif
547
548 /* We don't check for (*str != '\0') here because we want to parse
549 any trailing fake arguments in the syntax string. */
550 syn = CGEN_SYNTAX_STRING (syntax);
551
552 /* Mnemonics come first for now, ensure valid string. */
553 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
554 abort ();
555
556 ++syn;
557
558 while (* syn != 0)
559 {
560 /* Non operand chars must match exactly. */
561 if (CGEN_SYNTAX_CHAR_P (* syn))
562 {
563 /* FIXME: While we allow for non-GAS callers above, we assume the
564 first char after the mnemonic part is a space. */
565 /* FIXME: We also take inappropriate advantage of the fact that
566 GAS's input scrubber will remove extraneous blanks. */
567 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
568 {
569 #ifdef CGEN_MNEMONIC_OPERANDS
570 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
571 past_opcode_p = 1;
572 #endif
573 ++ syn;
574 ++ str;
575 }
576 else if (*str)
577 {
578 /* Syntax char didn't match. Can't be this insn. */
579 static char msg [80];
580
581 /* xgettext:c-format */
582 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
583 CGEN_SYNTAX_CHAR(*syn), *str);
584 return msg;
585 }
586 else
587 {
588 /* Ran out of input. */
589 static char msg [80];
590
591 /* xgettext:c-format */
592 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
593 CGEN_SYNTAX_CHAR(*syn));
594 return msg;
595 }
596 continue;
597 }
598
599 #ifdef CGEN_MNEMONIC_OPERANDS
600 (void) past_opcode_p;
601 #endif
602 /* We have an operand of some sort. */
603 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
604 if (errmsg)
605 return errmsg;
606
607 /* Done with this operand, continue with next one. */
608 ++ syn;
609 }
610
611 /* If we're at the end of the syntax string, we're done. */
612 if (* syn == 0)
613 {
614 /* FIXME: For the moment we assume a valid `str' can only contain
615 blanks now. IE: We needn't try again with a longer version of
616 the insn and it is assumed that longer versions of insns appear
617 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
618 while (ISSPACE (* str))
619 ++ str;
620
621 if (* str != '\0')
622 return _("junk at end of line"); /* FIXME: would like to include `str' */
623
624 return NULL;
625 }
626
627 /* We couldn't parse it. */
628 return _("unrecognized instruction");
629 }
630
631 /* Main entry point.
632 This routine is called for each instruction to be assembled.
633 STR points to the insn to be assembled.
634 We assume all necessary tables have been initialized.
635 The assembled instruction, less any fixups, is stored in BUF.
636 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
637 still needs to be converted to target byte order, otherwise BUF is an array
638 of bytes in target byte order.
639 The result is a pointer to the insn's entry in the opcode table,
640 or NULL if an error occured (an error message will have already been
641 printed).
642
643 Note that when processing (non-alias) macro-insns,
644 this function recurses.
645
646 ??? It's possible to make this cpu-independent.
647 One would have to deal with a few minor things.
648 At this point in time doing so would be more of a curiosity than useful
649 [for example this file isn't _that_ big], but keeping the possibility in
650 mind helps keep the design clean. */
651
652 const CGEN_INSN *
lm32_cgen_assemble_insn(CGEN_CPU_DESC cd,const char * str,CGEN_FIELDS * fields,CGEN_INSN_BYTES_PTR buf,char ** errmsg)653 lm32_cgen_assemble_insn (CGEN_CPU_DESC cd,
654 const char *str,
655 CGEN_FIELDS *fields,
656 CGEN_INSN_BYTES_PTR buf,
657 char **errmsg)
658 {
659 const char *start;
660 CGEN_INSN_LIST *ilist;
661 const char *parse_errmsg = NULL;
662 const char *insert_errmsg = NULL;
663 int recognized_mnemonic = 0;
664
665 /* Skip leading white space. */
666 while (ISSPACE (* str))
667 ++ str;
668
669 /* The instructions are stored in hashed lists.
670 Get the first in the list. */
671 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
672
673 /* Keep looking until we find a match. */
674 start = str;
675 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
676 {
677 const CGEN_INSN *insn = ilist->insn;
678 recognized_mnemonic = 1;
679
680 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
681 /* Not usually needed as unsupported opcodes
682 shouldn't be in the hash lists. */
683 /* Is this insn supported by the selected cpu? */
684 if (! lm32_cgen_insn_supported (cd, insn))
685 continue;
686 #endif
687 /* If the RELAXED attribute is set, this is an insn that shouldn't be
688 chosen immediately. Instead, it is used during assembler/linker
689 relaxation if possible. */
690 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
691 continue;
692
693 str = start;
694
695 /* Skip this insn if str doesn't look right lexically. */
696 if (CGEN_INSN_RX (insn) != NULL &&
697 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
698 continue;
699
700 /* Allow parse/insert handlers to obtain length of insn. */
701 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
702
703 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
704 if (parse_errmsg != NULL)
705 continue;
706
707 /* ??? 0 is passed for `pc'. */
708 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
709 (bfd_vma) 0);
710 if (insert_errmsg != NULL)
711 continue;
712
713 /* It is up to the caller to actually output the insn and any
714 queued relocs. */
715 return insn;
716 }
717
718 {
719 static char errbuf[150];
720 const char *tmp_errmsg;
721 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
722 #define be_verbose 1
723 #else
724 #define be_verbose 0
725 #endif
726
727 if (be_verbose)
728 {
729 /* If requesting verbose error messages, use insert_errmsg.
730 Failing that, use parse_errmsg. */
731 tmp_errmsg = (insert_errmsg ? insert_errmsg :
732 parse_errmsg ? parse_errmsg :
733 recognized_mnemonic ?
734 _("unrecognized form of instruction") :
735 _("unrecognized instruction"));
736
737 if (strlen (start) > 50)
738 /* xgettext:c-format */
739 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
740 else
741 /* xgettext:c-format */
742 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
743 }
744 else
745 {
746 if (strlen (start) > 50)
747 /* xgettext:c-format */
748 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
749 else
750 /* xgettext:c-format */
751 sprintf (errbuf, _("bad instruction `%.50s'"), start);
752 }
753
754 *errmsg = errbuf;
755 return NULL;
756 }
757 }
758