1 /* DO NOT EDIT! -*- buffer-read-only: t -*- vi:set ro: */
2 /* Assembler interface for targets using CGEN. -*- C -*-
3 CGEN: Cpu tools GENerator
4
5 THIS FILE IS MACHINE GENERATED WITH CGEN.
6 - the resultant file is machine generated, cgen-asm.in isn't
7
8 Copyright (C) 1996-2024 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 opcodes_error_handler
350 (_("internal error: unrecognized field %d while parsing"),
351 opindex);
352 abort ();
353 }
354
355 return errmsg;
356 }
357
358 cgen_parse_fn * const lm32_cgen_parse_handlers[] =
359 {
360 parse_insn_normal,
361 };
362
363 void
lm32_cgen_init_asm(CGEN_CPU_DESC cd)364 lm32_cgen_init_asm (CGEN_CPU_DESC cd)
365 {
366 lm32_cgen_init_opcode_table (cd);
367 lm32_cgen_init_ibld_table (cd);
368 cd->parse_handlers = & lm32_cgen_parse_handlers[0];
369 cd->parse_operand = lm32_cgen_parse_operand;
370 #ifdef CGEN_ASM_INIT_HOOK
371 CGEN_ASM_INIT_HOOK
372 #endif
373 }
374
375
376
377 /* Regex construction routine.
378
379 This translates an opcode syntax string into a regex string,
380 by replacing any non-character syntax element (such as an
381 opcode) with the pattern '.*'
382
383 It then compiles the regex and stores it in the opcode, for
384 later use by lm32_cgen_assemble_insn
385
386 Returns NULL for success, an error message for failure. */
387
388 char *
lm32_cgen_build_insn_regex(CGEN_INSN * insn)389 lm32_cgen_build_insn_regex (CGEN_INSN *insn)
390 {
391 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
392 const char *mnem = CGEN_INSN_MNEMONIC (insn);
393 char rxbuf[CGEN_MAX_RX_ELEMENTS];
394 char *rx = rxbuf;
395 const CGEN_SYNTAX_CHAR_TYPE *syn;
396 int reg_err;
397
398 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
399
400 /* Mnemonics come first in the syntax string. */
401 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
402 return _("missing mnemonic in syntax string");
403 ++syn;
404
405 /* Generate a case sensitive regular expression that emulates case
406 insensitive matching in the "C" locale. We cannot generate a case
407 insensitive regular expression because in Turkish locales, 'i' and 'I'
408 are not equal modulo case conversion. */
409
410 /* Copy the literal mnemonic out of the insn. */
411 for (; *mnem; mnem++)
412 {
413 char c = *mnem;
414
415 if (ISALPHA (c))
416 {
417 *rx++ = '[';
418 *rx++ = TOLOWER (c);
419 *rx++ = TOUPPER (c);
420 *rx++ = ']';
421 }
422 else
423 *rx++ = c;
424 }
425
426 /* Copy any remaining literals from the syntax string into the rx. */
427 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
428 {
429 if (CGEN_SYNTAX_CHAR_P (* syn))
430 {
431 char c = CGEN_SYNTAX_CHAR (* syn);
432
433 switch (c)
434 {
435 /* Escape any regex metacharacters in the syntax. */
436 case '.': case '[': case '\\':
437 case '*': case '^': case '$':
438
439 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
440 case '?': case '{': case '}':
441 case '(': case ')': case '*':
442 case '|': case '+': case ']':
443 #endif
444 *rx++ = '\\';
445 *rx++ = c;
446 break;
447
448 default:
449 if (ISALPHA (c))
450 {
451 *rx++ = '[';
452 *rx++ = TOLOWER (c);
453 *rx++ = TOUPPER (c);
454 *rx++ = ']';
455 }
456 else
457 *rx++ = c;
458 break;
459 }
460 }
461 else
462 {
463 /* Replace non-syntax fields with globs. */
464 *rx++ = '.';
465 *rx++ = '*';
466 }
467 }
468
469 /* Trailing whitespace ok. */
470 * rx++ = '[';
471 * rx++ = ' ';
472 * rx++ = '\t';
473 * rx++ = ']';
474 * rx++ = '*';
475
476 /* But anchor it after that. */
477 * rx++ = '$';
478 * rx = '\0';
479
480 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
481 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
482
483 if (reg_err == 0)
484 return NULL;
485 else
486 {
487 static char msg[80];
488
489 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
490 regfree ((regex_t *) CGEN_INSN_RX (insn));
491 free (CGEN_INSN_RX (insn));
492 (CGEN_INSN_RX (insn)) = NULL;
493 return msg;
494 }
495 }
496
497
498 /* Default insn parser.
499
500 The syntax string is scanned and operands are parsed and stored in FIELDS.
501 Relocs are queued as we go via other callbacks.
502
503 ??? Note that this is currently an all-or-nothing parser. If we fail to
504 parse the instruction, we return 0 and the caller will start over from
505 the beginning. Backtracking will be necessary in parsing subexpressions,
506 but that can be handled there. Not handling backtracking here may get
507 expensive in the case of the m68k. Deal with later.
508
509 Returns NULL for success, an error message for failure. */
510
511 static const char *
parse_insn_normal(CGEN_CPU_DESC cd,const CGEN_INSN * insn,const char ** strp,CGEN_FIELDS * fields)512 parse_insn_normal (CGEN_CPU_DESC cd,
513 const CGEN_INSN *insn,
514 const char **strp,
515 CGEN_FIELDS *fields)
516 {
517 /* ??? Runtime added insns not handled yet. */
518 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
519 const char *str = *strp;
520 const char *errmsg;
521 const char *p;
522 const CGEN_SYNTAX_CHAR_TYPE * syn;
523 #ifdef CGEN_MNEMONIC_OPERANDS
524 /* FIXME: wip */
525 int past_opcode_p;
526 #endif
527
528 /* For now we assume the mnemonic is first (there are no leading operands).
529 We can parse it without needing to set up operand parsing.
530 GAS's input scrubber will ensure mnemonics are lowercase, but we may
531 not be called from GAS. */
532 p = CGEN_INSN_MNEMONIC (insn);
533 while (*p && TOLOWER (*p) == TOLOWER (*str))
534 ++p, ++str;
535
536 if (* p)
537 return _("unrecognized instruction");
538
539 #ifndef CGEN_MNEMONIC_OPERANDS
540 if (* str && ! ISSPACE (* str))
541 return _("unrecognized instruction");
542 #endif
543
544 CGEN_INIT_PARSE (cd);
545 cgen_init_parse_operand (cd);
546 #ifdef CGEN_MNEMONIC_OPERANDS
547 past_opcode_p = 0;
548 #endif
549
550 /* We don't check for (*str != '\0') here because we want to parse
551 any trailing fake arguments in the syntax string. */
552 syn = CGEN_SYNTAX_STRING (syntax);
553
554 /* Mnemonics come first for now, ensure valid string. */
555 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
556 abort ();
557
558 ++syn;
559
560 while (* syn != 0)
561 {
562 /* Non operand chars must match exactly. */
563 if (CGEN_SYNTAX_CHAR_P (* syn))
564 {
565 /* FIXME: While we allow for non-GAS callers above, we assume the
566 first char after the mnemonic part is a space. */
567 /* FIXME: We also take inappropriate advantage of the fact that
568 GAS's input scrubber will remove extraneous blanks. */
569 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
570 {
571 #ifdef CGEN_MNEMONIC_OPERANDS
572 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
573 past_opcode_p = 1;
574 #endif
575 ++ syn;
576 ++ str;
577 }
578 else if (*str)
579 {
580 /* Syntax char didn't match. Can't be this insn. */
581 static char msg [80];
582
583 /* xgettext:c-format */
584 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
585 CGEN_SYNTAX_CHAR(*syn), *str);
586 return msg;
587 }
588 else
589 {
590 /* Ran out of input. */
591 static char msg [80];
592
593 /* xgettext:c-format */
594 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
595 CGEN_SYNTAX_CHAR(*syn));
596 return msg;
597 }
598 continue;
599 }
600
601 #ifdef CGEN_MNEMONIC_OPERANDS
602 (void) past_opcode_p;
603 #endif
604 /* We have an operand of some sort. */
605 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
606 if (errmsg)
607 return errmsg;
608
609 /* Done with this operand, continue with next one. */
610 ++ syn;
611 }
612
613 /* If we're at the end of the syntax string, we're done. */
614 if (* syn == 0)
615 {
616 /* FIXME: For the moment we assume a valid `str' can only contain
617 blanks now. IE: We needn't try again with a longer version of
618 the insn and it is assumed that longer versions of insns appear
619 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
620 while (ISSPACE (* str))
621 ++ str;
622
623 if (* str != '\0')
624 return _("junk at end of line"); /* FIXME: would like to include `str' */
625
626 return NULL;
627 }
628
629 /* We couldn't parse it. */
630 return _("unrecognized instruction");
631 }
632
633 /* Main entry point.
634 This routine is called for each instruction to be assembled.
635 STR points to the insn to be assembled.
636 We assume all necessary tables have been initialized.
637 The assembled instruction, less any fixups, is stored in BUF.
638 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
639 still needs to be converted to target byte order, otherwise BUF is an array
640 of bytes in target byte order.
641 The result is a pointer to the insn's entry in the opcode table,
642 or NULL if an error occured (an error message will have already been
643 printed).
644
645 Note that when processing (non-alias) macro-insns,
646 this function recurses.
647
648 ??? It's possible to make this cpu-independent.
649 One would have to deal with a few minor things.
650 At this point in time doing so would be more of a curiosity than useful
651 [for example this file isn't _that_ big], but keeping the possibility in
652 mind helps keep the design clean. */
653
654 const CGEN_INSN *
lm32_cgen_assemble_insn(CGEN_CPU_DESC cd,const char * str,CGEN_FIELDS * fields,CGEN_INSN_BYTES_PTR buf,char ** errmsg)655 lm32_cgen_assemble_insn (CGEN_CPU_DESC cd,
656 const char *str,
657 CGEN_FIELDS *fields,
658 CGEN_INSN_BYTES_PTR buf,
659 char **errmsg)
660 {
661 const char *start;
662 CGEN_INSN_LIST *ilist;
663 const char *parse_errmsg = NULL;
664 const char *insert_errmsg = NULL;
665 int recognized_mnemonic = 0;
666
667 /* Skip leading white space. */
668 while (ISSPACE (* str))
669 ++ str;
670
671 /* The instructions are stored in hashed lists.
672 Get the first in the list. */
673 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
674
675 /* Keep looking until we find a match. */
676 start = str;
677 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
678 {
679 const CGEN_INSN *insn = ilist->insn;
680 recognized_mnemonic = 1;
681
682 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
683 /* Not usually needed as unsupported opcodes
684 shouldn't be in the hash lists. */
685 /* Is this insn supported by the selected cpu? */
686 if (! lm32_cgen_insn_supported (cd, insn))
687 continue;
688 #endif
689 /* If the RELAXED attribute is set, this is an insn that shouldn't be
690 chosen immediately. Instead, it is used during assembler/linker
691 relaxation if possible. */
692 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
693 continue;
694
695 str = start;
696
697 /* Skip this insn if str doesn't look right lexically. */
698 if (CGEN_INSN_RX (insn) != NULL &&
699 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
700 continue;
701
702 /* Allow parse/insert handlers to obtain length of insn. */
703 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
704
705 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
706 if (parse_errmsg != NULL)
707 continue;
708
709 /* ??? 0 is passed for `pc'. */
710 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
711 (bfd_vma) 0);
712 if (insert_errmsg != NULL)
713 continue;
714
715 /* It is up to the caller to actually output the insn and any
716 queued relocs. */
717 return insn;
718 }
719
720 {
721 static char errbuf[150];
722 const char *tmp_errmsg;
723 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
724 #define be_verbose 1
725 #else
726 #define be_verbose 0
727 #endif
728
729 if (be_verbose)
730 {
731 /* If requesting verbose error messages, use insert_errmsg.
732 Failing that, use parse_errmsg. */
733 tmp_errmsg = (insert_errmsg ? insert_errmsg :
734 parse_errmsg ? parse_errmsg :
735 recognized_mnemonic ?
736 _("unrecognized form of instruction") :
737 _("unrecognized instruction"));
738
739 if (strlen (start) > 50)
740 /* xgettext:c-format */
741 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
742 else
743 /* xgettext:c-format */
744 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
745 }
746 else
747 {
748 if (strlen (start) > 50)
749 /* xgettext:c-format */
750 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
751 else
752 /* xgettext:c-format */
753 sprintf (errbuf, _("bad instruction `%.50s'"), start);
754 }
755
756 *errmsg = errbuf;
757 return NULL;
758 }
759 }
760