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 Free Software Foundation, Inc.
8
9 This file is part of the GNU Binutils and GDB, the GNU debugger.
10
11 This program 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 2, or (at your option)
14 any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public 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 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24
25 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
26 Keep that in mind. */
27
28 #include "sysdep.h"
29 #include <stdio.h>
30 #include "ansidecl.h"
31 #include "bfd.h"
32 #include "symcat.h"
33 #include "xstormy16-desc.h"
34 #include "xstormy16-opc.h"
35 #include "opintl.h"
36 #include "xregex.h"
37 #include "libiberty.h"
38 #include "safe-ctype.h"
39
40 #undef min
41 #define min(a,b) ((a) < (b) ? (a) : (b))
42 #undef max
43 #define max(a,b) ((a) > (b) ? (a) : (b))
44
45 static const char * parse_insn_normal
46 (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
47
48 /* -- assembler routines inserted here. */
49
50 /* -- asm.c */
51 static const char * parse_mem8
52 PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *));
53 static const char * parse_small_immediate
54 PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *));
55 static const char * parse_immediate16
56 PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *));
57
58 /* The machine-independent code doesn't know how to disambiguate
59 mov (foo),r3
60 and
61 mov (r2),r3
62 where 'foo' is a label. This helps it out. */
63
64 static const char *
parse_mem8(cd,strp,opindex,valuep)65 parse_mem8 (cd, strp, opindex, valuep)
66 CGEN_CPU_DESC cd;
67 const char **strp;
68 int opindex;
69 unsigned long *valuep;
70 {
71 if (**strp == '(')
72 {
73 const char *s = *strp;
74
75 if (s[1] == '-' && s[2] == '-')
76 return _("Bad register in preincrement");
77
78 while (ISALNUM (*++s))
79 ;
80 if (s[0] == '+' && s[1] == '+' && (s[2] == ')' || s[2] == ','))
81 return _("Bad register in postincrement");
82 if (s[0] == ',' || s[0] == ')')
83 return _("Bad register name");
84 }
85 else if (cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names,
86 valuep) == NULL)
87 return _("Label conflicts with register name");
88 else if (strncasecmp (*strp, "rx,", 3) == 0
89 || strncasecmp (*strp, "rxl,", 3) == 0
90 || strncasecmp (*strp, "rxh,", 3) == 0)
91 return _("Label conflicts with `Rx'");
92 else if (**strp == '#')
93 return _("Bad immediate expression");
94
95 return cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
96 }
97
98 /* For the add and subtract instructions, there are two immediate forms,
99 one for small operands and one for large ones. We want to use
100 the small one when possible, but we do not want to generate relocs
101 of the small size. This is somewhat tricky. */
102
103 static const char *
parse_small_immediate(cd,strp,opindex,valuep)104 parse_small_immediate (cd, strp, opindex, valuep)
105 CGEN_CPU_DESC cd;
106 const char **strp;
107 int opindex;
108 unsigned long *valuep;
109 {
110 bfd_vma value;
111 enum cgen_parse_operand_result result;
112 const char *errmsg;
113
114 if (**strp == '@')
115 return _("No relocation for small immediate");
116
117 errmsg = (* cd->parse_operand_fn)
118 (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
119 &result, &value);
120
121 if (errmsg)
122 return errmsg;
123
124 if (result != CGEN_PARSE_OPERAND_RESULT_NUMBER)
125 return _("Small operand was not an immediate number");
126
127 *valuep = value;
128 return NULL;
129 }
130
131 /* Literal scan be either a normal literal, a @hi() or @lo relocation. */
132
133 static const char *
parse_immediate16(cd,strp,opindex,valuep)134 parse_immediate16 (cd, strp, opindex, valuep)
135 CGEN_CPU_DESC cd;
136 const char **strp;
137 int opindex;
138 unsigned long *valuep;
139 {
140 const char *errmsg;
141 enum cgen_parse_operand_result result;
142 bfd_reloc_code_real_type code = BFD_RELOC_NONE;
143 bfd_vma value;
144
145 if (strncmp (*strp, "@hi(", 4) == 0)
146 {
147 *strp += 4;
148 code = BFD_RELOC_HI16;
149 }
150 else
151 if (strncmp (*strp, "@lo(", 4) == 0)
152 {
153 *strp += 4;
154 code = BFD_RELOC_LO16;
155 }
156
157 if (code == BFD_RELOC_NONE)
158 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
159 else
160 {
161 errmsg = cgen_parse_address (cd, strp, opindex, code, &result, &value);
162 if ((errmsg == NULL) &&
163 (result != CGEN_PARSE_OPERAND_RESULT_QUEUED))
164 errmsg = _("Operand is not a symbol");
165
166 *valuep = value;
167 if ((code == BFD_RELOC_HI16 || code == BFD_RELOC_LO16)
168 && **strp == ')')
169 *strp += 1;
170 else
171 {
172 errmsg = _("Syntax error: No trailing ')'");
173 return errmsg;
174 }
175 }
176 return errmsg;
177 }
178 /* -- */
179
180 const char * xstormy16_cgen_parse_operand
181 PARAMS ((CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *));
182
183 /* Main entry point for operand parsing.
184
185 This function is basically just a big switch statement. Earlier versions
186 used tables to look up the function to use, but
187 - if the table contains both assembler and disassembler functions then
188 the disassembler contains much of the assembler and vice-versa,
189 - there's a lot of inlining possibilities as things grow,
190 - using a switch statement avoids the function call overhead.
191
192 This function could be moved into `parse_insn_normal', but keeping it
193 separate makes clear the interface between `parse_insn_normal' and each of
194 the handlers. */
195
196 const char *
xstormy16_cgen_parse_operand(cd,opindex,strp,fields)197 xstormy16_cgen_parse_operand (cd, opindex, strp, fields)
198 CGEN_CPU_DESC cd;
199 int opindex;
200 const char ** strp;
201 CGEN_FIELDS * fields;
202 {
203 const char * errmsg = NULL;
204 /* Used by scalar operands that still need to be parsed. */
205 long junk ATTRIBUTE_UNUSED;
206
207 switch (opindex)
208 {
209 case XSTORMY16_OPERAND_RB :
210 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_Rb_names, & fields->f_Rb);
211 break;
212 case XSTORMY16_OPERAND_RBJ :
213 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_Rb_names, & fields->f_Rbj);
214 break;
215 case XSTORMY16_OPERAND_RD :
216 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rd);
217 break;
218 case XSTORMY16_OPERAND_RDM :
219 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rdm);
220 break;
221 case XSTORMY16_OPERAND_RM :
222 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rm);
223 break;
224 case XSTORMY16_OPERAND_RS :
225 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rs);
226 break;
227 case XSTORMY16_OPERAND_ABS24 :
228 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_ABS24, &fields->f_abs24);
229 break;
230 case XSTORMY16_OPERAND_BCOND2 :
231 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_branchcond, & fields->f_op2);
232 break;
233 case XSTORMY16_OPERAND_BCOND5 :
234 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_branchcond, & fields->f_op5);
235 break;
236 case XSTORMY16_OPERAND_HMEM8 :
237 errmsg = parse_mem8 (cd, strp, XSTORMY16_OPERAND_HMEM8, &fields->f_hmem8);
238 break;
239 case XSTORMY16_OPERAND_IMM12 :
240 errmsg = cgen_parse_signed_integer (cd, strp, XSTORMY16_OPERAND_IMM12, &fields->f_imm12);
241 break;
242 case XSTORMY16_OPERAND_IMM16 :
243 errmsg = parse_immediate16 (cd, strp, XSTORMY16_OPERAND_IMM16, &fields->f_imm16);
244 break;
245 case XSTORMY16_OPERAND_IMM2 :
246 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM2, &fields->f_imm2);
247 break;
248 case XSTORMY16_OPERAND_IMM3 :
249 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM3, &fields->f_imm3);
250 break;
251 case XSTORMY16_OPERAND_IMM3B :
252 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM3B, &fields->f_imm3b);
253 break;
254 case XSTORMY16_OPERAND_IMM4 :
255 errmsg = parse_small_immediate (cd, strp, XSTORMY16_OPERAND_IMM4, &fields->f_imm4);
256 break;
257 case XSTORMY16_OPERAND_IMM8 :
258 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM8, &fields->f_imm8);
259 break;
260 case XSTORMY16_OPERAND_IMM8SMALL :
261 errmsg = parse_small_immediate (cd, strp, XSTORMY16_OPERAND_IMM8SMALL, &fields->f_imm8);
262 break;
263 case XSTORMY16_OPERAND_LMEM8 :
264 errmsg = parse_mem8 (cd, strp, XSTORMY16_OPERAND_LMEM8, &fields->f_lmem8);
265 break;
266 case XSTORMY16_OPERAND_REL12 :
267 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL12, &fields->f_rel12);
268 break;
269 case XSTORMY16_OPERAND_REL12A :
270 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL12A, &fields->f_rel12a);
271 break;
272 case XSTORMY16_OPERAND_REL8_2 :
273 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL8_2, &fields->f_rel8_2);
274 break;
275 case XSTORMY16_OPERAND_REL8_4 :
276 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL8_4, &fields->f_rel8_4);
277 break;
278 case XSTORMY16_OPERAND_WS2 :
279 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_wordsize, & fields->f_op2m);
280 break;
281
282 default :
283 /* xgettext:c-format */
284 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
285 abort ();
286 }
287
288 return errmsg;
289 }
290
291 cgen_parse_fn * const xstormy16_cgen_parse_handlers[] =
292 {
293 parse_insn_normal,
294 };
295
296 void
xstormy16_cgen_init_asm(cd)297 xstormy16_cgen_init_asm (cd)
298 CGEN_CPU_DESC cd;
299 {
300 xstormy16_cgen_init_opcode_table (cd);
301 xstormy16_cgen_init_ibld_table (cd);
302 cd->parse_handlers = & xstormy16_cgen_parse_handlers[0];
303 cd->parse_operand = xstormy16_cgen_parse_operand;
304 }
305
306
307
308 /* Regex construction routine.
309
310 This translates an opcode syntax string into a regex string,
311 by replacing any non-character syntax element (such as an
312 opcode) with the pattern '.*'
313
314 It then compiles the regex and stores it in the opcode, for
315 later use by xstormy16_cgen_assemble_insn
316
317 Returns NULL for success, an error message for failure. */
318
319 char *
xstormy16_cgen_build_insn_regex(CGEN_INSN * insn)320 xstormy16_cgen_build_insn_regex (CGEN_INSN *insn)
321 {
322 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
323 const char *mnem = CGEN_INSN_MNEMONIC (insn);
324 char rxbuf[CGEN_MAX_RX_ELEMENTS];
325 char *rx = rxbuf;
326 const CGEN_SYNTAX_CHAR_TYPE *syn;
327 int reg_err;
328
329 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
330
331 /* Mnemonics come first in the syntax string. */
332 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
333 return _("missing mnemonic in syntax string");
334 ++syn;
335
336 /* Generate a case sensitive regular expression that emulates case
337 insensitive matching in the "C" locale. We cannot generate a case
338 insensitive regular expression because in Turkish locales, 'i' and 'I'
339 are not equal modulo case conversion. */
340
341 /* Copy the literal mnemonic out of the insn. */
342 for (; *mnem; mnem++)
343 {
344 char c = *mnem;
345
346 if (ISALPHA (c))
347 {
348 *rx++ = '[';
349 *rx++ = TOLOWER (c);
350 *rx++ = TOUPPER (c);
351 *rx++ = ']';
352 }
353 else
354 *rx++ = c;
355 }
356
357 /* Copy any remaining literals from the syntax string into the rx. */
358 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
359 {
360 if (CGEN_SYNTAX_CHAR_P (* syn))
361 {
362 char c = CGEN_SYNTAX_CHAR (* syn);
363
364 switch (c)
365 {
366 /* Escape any regex metacharacters in the syntax. */
367 case '.': case '[': case '\\':
368 case '*': case '^': case '$':
369
370 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
371 case '?': case '{': case '}':
372 case '(': case ')': case '*':
373 case '|': case '+': case ']':
374 #endif
375 *rx++ = '\\';
376 *rx++ = c;
377 break;
378
379 default:
380 if (ISALPHA (c))
381 {
382 *rx++ = '[';
383 *rx++ = TOLOWER (c);
384 *rx++ = TOUPPER (c);
385 *rx++ = ']';
386 }
387 else
388 *rx++ = c;
389 break;
390 }
391 }
392 else
393 {
394 /* Replace non-syntax fields with globs. */
395 *rx++ = '.';
396 *rx++ = '*';
397 }
398 }
399
400 /* Trailing whitespace ok. */
401 * rx++ = '[';
402 * rx++ = ' ';
403 * rx++ = '\t';
404 * rx++ = ']';
405 * rx++ = '*';
406
407 /* But anchor it after that. */
408 * rx++ = '$';
409 * rx = '\0';
410
411 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
412 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
413
414 if (reg_err == 0)
415 return NULL;
416 else
417 {
418 static char msg[80];
419
420 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
421 regfree ((regex_t *) CGEN_INSN_RX (insn));
422 free (CGEN_INSN_RX (insn));
423 (CGEN_INSN_RX (insn)) = NULL;
424 return msg;
425 }
426 }
427
428
429 /* Default insn parser.
430
431 The syntax string is scanned and operands are parsed and stored in FIELDS.
432 Relocs are queued as we go via other callbacks.
433
434 ??? Note that this is currently an all-or-nothing parser. If we fail to
435 parse the instruction, we return 0 and the caller will start over from
436 the beginning. Backtracking will be necessary in parsing subexpressions,
437 but that can be handled there. Not handling backtracking here may get
438 expensive in the case of the m68k. Deal with later.
439
440 Returns NULL for success, an error message for failure. */
441
442 static const char *
parse_insn_normal(CGEN_CPU_DESC cd,const CGEN_INSN * insn,const char ** strp,CGEN_FIELDS * fields)443 parse_insn_normal (CGEN_CPU_DESC cd,
444 const CGEN_INSN *insn,
445 const char **strp,
446 CGEN_FIELDS *fields)
447 {
448 /* ??? Runtime added insns not handled yet. */
449 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
450 const char *str = *strp;
451 const char *errmsg;
452 const char *p;
453 const CGEN_SYNTAX_CHAR_TYPE * syn;
454 #ifdef CGEN_MNEMONIC_OPERANDS
455 /* FIXME: wip */
456 int past_opcode_p;
457 #endif
458
459 /* For now we assume the mnemonic is first (there are no leading operands).
460 We can parse it without needing to set up operand parsing.
461 GAS's input scrubber will ensure mnemonics are lowercase, but we may
462 not be called from GAS. */
463 p = CGEN_INSN_MNEMONIC (insn);
464 while (*p && TOLOWER (*p) == TOLOWER (*str))
465 ++p, ++str;
466
467 if (* p)
468 return _("unrecognized instruction");
469
470 #ifndef CGEN_MNEMONIC_OPERANDS
471 if (* str && ! ISSPACE (* str))
472 return _("unrecognized instruction");
473 #endif
474
475 CGEN_INIT_PARSE (cd);
476 cgen_init_parse_operand (cd);
477 #ifdef CGEN_MNEMONIC_OPERANDS
478 past_opcode_p = 0;
479 #endif
480
481 /* We don't check for (*str != '\0') here because we want to parse
482 any trailing fake arguments in the syntax string. */
483 syn = CGEN_SYNTAX_STRING (syntax);
484
485 /* Mnemonics come first for now, ensure valid string. */
486 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
487 abort ();
488
489 ++syn;
490
491 while (* syn != 0)
492 {
493 /* Non operand chars must match exactly. */
494 if (CGEN_SYNTAX_CHAR_P (* syn))
495 {
496 /* FIXME: While we allow for non-GAS callers above, we assume the
497 first char after the mnemonic part is a space. */
498 /* FIXME: We also take inappropriate advantage of the fact that
499 GAS's input scrubber will remove extraneous blanks. */
500 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
501 {
502 #ifdef CGEN_MNEMONIC_OPERANDS
503 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
504 past_opcode_p = 1;
505 #endif
506 ++ syn;
507 ++ str;
508 }
509 else if (*str)
510 {
511 /* Syntax char didn't match. Can't be this insn. */
512 static char msg [80];
513
514 /* xgettext:c-format */
515 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
516 CGEN_SYNTAX_CHAR(*syn), *str);
517 return msg;
518 }
519 else
520 {
521 /* Ran out of input. */
522 static char msg [80];
523
524 /* xgettext:c-format */
525 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
526 CGEN_SYNTAX_CHAR(*syn));
527 return msg;
528 }
529 continue;
530 }
531
532 /* We have an operand of some sort. */
533 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
534 &str, fields);
535 if (errmsg)
536 return errmsg;
537
538 /* Done with this operand, continue with next one. */
539 ++ syn;
540 }
541
542 /* If we're at the end of the syntax string, we're done. */
543 if (* syn == 0)
544 {
545 /* FIXME: For the moment we assume a valid `str' can only contain
546 blanks now. IE: We needn't try again with a longer version of
547 the insn and it is assumed that longer versions of insns appear
548 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
549 while (ISSPACE (* str))
550 ++ str;
551
552 if (* str != '\0')
553 return _("junk at end of line"); /* FIXME: would like to include `str' */
554
555 return NULL;
556 }
557
558 /* We couldn't parse it. */
559 return _("unrecognized instruction");
560 }
561
562 /* Main entry point.
563 This routine is called for each instruction to be assembled.
564 STR points to the insn to be assembled.
565 We assume all necessary tables have been initialized.
566 The assembled instruction, less any fixups, is stored in BUF.
567 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
568 still needs to be converted to target byte order, otherwise BUF is an array
569 of bytes in target byte order.
570 The result is a pointer to the insn's entry in the opcode table,
571 or NULL if an error occured (an error message will have already been
572 printed).
573
574 Note that when processing (non-alias) macro-insns,
575 this function recurses.
576
577 ??? It's possible to make this cpu-independent.
578 One would have to deal with a few minor things.
579 At this point in time doing so would be more of a curiosity than useful
580 [for example this file isn't _that_ big], but keeping the possibility in
581 mind helps keep the design clean. */
582
583 const CGEN_INSN *
xstormy16_cgen_assemble_insn(CGEN_CPU_DESC cd,const char * str,CGEN_FIELDS * fields,CGEN_INSN_BYTES_PTR buf,char ** errmsg)584 xstormy16_cgen_assemble_insn (CGEN_CPU_DESC cd,
585 const char *str,
586 CGEN_FIELDS *fields,
587 CGEN_INSN_BYTES_PTR buf,
588 char **errmsg)
589 {
590 const char *start;
591 CGEN_INSN_LIST *ilist;
592 const char *parse_errmsg = NULL;
593 const char *insert_errmsg = NULL;
594 int recognized_mnemonic = 0;
595
596 /* Skip leading white space. */
597 while (ISSPACE (* str))
598 ++ str;
599
600 /* The instructions are stored in hashed lists.
601 Get the first in the list. */
602 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
603
604 /* Keep looking until we find a match. */
605 start = str;
606 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
607 {
608 const CGEN_INSN *insn = ilist->insn;
609 recognized_mnemonic = 1;
610
611 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
612 /* Not usually needed as unsupported opcodes
613 shouldn't be in the hash lists. */
614 /* Is this insn supported by the selected cpu? */
615 if (! xstormy16_cgen_insn_supported (cd, insn))
616 continue;
617 #endif
618 /* If the RELAXED attribute is set, this is an insn that shouldn't be
619 chosen immediately. Instead, it is used during assembler/linker
620 relaxation if possible. */
621 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
622 continue;
623
624 str = start;
625
626 /* Skip this insn if str doesn't look right lexically. */
627 if (CGEN_INSN_RX (insn) != NULL &&
628 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
629 continue;
630
631 /* Allow parse/insert handlers to obtain length of insn. */
632 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
633
634 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
635 if (parse_errmsg != NULL)
636 continue;
637
638 /* ??? 0 is passed for `pc'. */
639 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
640 (bfd_vma) 0);
641 if (insert_errmsg != NULL)
642 continue;
643
644 /* It is up to the caller to actually output the insn and any
645 queued relocs. */
646 return insn;
647 }
648
649 {
650 static char errbuf[150];
651 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
652 const char *tmp_errmsg;
653
654 /* If requesting verbose error messages, use insert_errmsg.
655 Failing that, use parse_errmsg. */
656 tmp_errmsg = (insert_errmsg ? insert_errmsg :
657 parse_errmsg ? parse_errmsg :
658 recognized_mnemonic ?
659 _("unrecognized form of instruction") :
660 _("unrecognized instruction"));
661
662 if (strlen (start) > 50)
663 /* xgettext:c-format */
664 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
665 else
666 /* xgettext:c-format */
667 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
668 #else
669 if (strlen (start) > 50)
670 /* xgettext:c-format */
671 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
672 else
673 /* xgettext:c-format */
674 sprintf (errbuf, _("bad instruction `%.50s'"), start);
675 #endif
676
677 *errmsg = errbuf;
678 return NULL;
679 }
680 }
681
682 #if 0 /* This calls back to GAS which we can't do without care. */
683
684 /* Record each member of OPVALS in the assembler's symbol table.
685 This lets GAS parse registers for us.
686 ??? Interesting idea but not currently used. */
687
688 /* Record each member of OPVALS in the assembler's symbol table.
689 FIXME: Not currently used. */
690
691 void
692 xstormy16_cgen_asm_hash_keywords (CGEN_CPU_DESC cd, CGEN_KEYWORD *opvals)
693 {
694 CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
695 const CGEN_KEYWORD_ENTRY * ke;
696
697 while ((ke = cgen_keyword_search_next (& search)) != NULL)
698 {
699 #if 0 /* Unnecessary, should be done in the search routine. */
700 if (! xstormy16_cgen_opval_supported (ke))
701 continue;
702 #endif
703 cgen_asm_record_register (cd, ke->name, ke->value);
704 }
705 }
706
707 #endif /* 0 */
708