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 "fr30-desc.h"
36 #include "fr30-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 /* Handle register lists for LDMx and STMx. */
54
55 static int
parse_register_number(const char ** strp)56 parse_register_number (const char **strp)
57 {
58 int regno;
59
60 if (**strp < '0' || **strp > '9')
61 return -1; /* Error. */
62 regno = **strp - '0';
63 ++*strp;
64
65 if (**strp >= '0' && **strp <= '9')
66 {
67 regno = regno * 10 + (**strp - '0');
68 ++*strp;
69 }
70
71 return regno;
72 }
73
74 static const char *
parse_register_list(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,const char ** strp,int opindex ATTRIBUTE_UNUSED,unsigned long * valuep,int high_low,int load_store)75 parse_register_list (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
76 const char **strp,
77 int opindex ATTRIBUTE_UNUSED,
78 unsigned long *valuep,
79 int high_low, /* 0 == high, 1 == low. */
80 int load_store) /* 0 == load, 1 == store. */
81 {
82 *valuep = 0;
83 while (**strp && **strp != ')')
84 {
85 int regno;
86
87 if (**strp != 'R' && **strp != 'r')
88 break;
89 ++*strp;
90
91 regno = parse_register_number (strp);
92 if (regno == -1)
93 return _("Register number is not valid");
94 if (regno > 7 && !high_low)
95 return _("Register must be between r0 and r7");
96 if (regno < 8 && high_low)
97 return _("Register must be between r8 and r15");
98
99 if (high_low)
100 regno -= 8;
101
102 if (load_store) /* Mask is reversed for store. */
103 *valuep |= 0x80 >> regno;
104 else
105 *valuep |= 1 << regno;
106
107 if (**strp == ',')
108 {
109 if (*(*strp + 1) == ')')
110 break;
111 ++*strp;
112 }
113 }
114
115 if (!*strp || **strp != ')')
116 return _("Register list is not valid");
117
118 return NULL;
119 }
120
121 static const char *
parse_low_register_list_ld(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)122 parse_low_register_list_ld (CGEN_CPU_DESC cd,
123 const char **strp,
124 int opindex,
125 unsigned long *valuep)
126 {
127 return parse_register_list (cd, strp, opindex, valuep,
128 0 /* Low. */, 0 /* Load. */);
129 }
130
131 static const char *
parse_hi_register_list_ld(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)132 parse_hi_register_list_ld (CGEN_CPU_DESC cd,
133 const char **strp,
134 int opindex,
135 unsigned long *valuep)
136 {
137 return parse_register_list (cd, strp, opindex, valuep,
138 1 /* High. */, 0 /* Load. */);
139 }
140
141 static const char *
parse_low_register_list_st(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)142 parse_low_register_list_st (CGEN_CPU_DESC cd,
143 const char **strp,
144 int opindex,
145 unsigned long *valuep)
146 {
147 return parse_register_list (cd, strp, opindex, valuep,
148 0 /* Low. */, 1 /* Store. */);
149 }
150
151 static const char *
parse_hi_register_list_st(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)152 parse_hi_register_list_st (CGEN_CPU_DESC cd,
153 const char **strp,
154 int opindex,
155 unsigned long *valuep)
156 {
157 return parse_register_list (cd, strp, opindex, valuep,
158 1 /* High. */, 1 /* Store. */);
159 }
160
161 /* -- */
162
163 const char * fr30_cgen_parse_operand
164 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
165
166 /* Main entry point for operand parsing.
167
168 This function is basically just a big switch statement. Earlier versions
169 used tables to look up the function to use, but
170 - if the table contains both assembler and disassembler functions then
171 the disassembler contains much of the assembler and vice-versa,
172 - there's a lot of inlining possibilities as things grow,
173 - using a switch statement avoids the function call overhead.
174
175 This function could be moved into `parse_insn_normal', but keeping it
176 separate makes clear the interface between `parse_insn_normal' and each of
177 the handlers. */
178
179 const char *
fr30_cgen_parse_operand(CGEN_CPU_DESC cd,int opindex,const char ** strp,CGEN_FIELDS * fields)180 fr30_cgen_parse_operand (CGEN_CPU_DESC cd,
181 int opindex,
182 const char ** strp,
183 CGEN_FIELDS * fields)
184 {
185 const char * errmsg = NULL;
186 /* Used by scalar operands that still need to be parsed. */
187 long junk ATTRIBUTE_UNUSED;
188
189 switch (opindex)
190 {
191 case FR30_OPERAND_CRI :
192 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_cr_names, & fields->f_CRi);
193 break;
194 case FR30_OPERAND_CRJ :
195 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_cr_names, & fields->f_CRj);
196 break;
197 case FR30_OPERAND_R13 :
198 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r13, & junk);
199 break;
200 case FR30_OPERAND_R14 :
201 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r14, & junk);
202 break;
203 case FR30_OPERAND_R15 :
204 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r15, & junk);
205 break;
206 case FR30_OPERAND_RI :
207 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Ri);
208 break;
209 case FR30_OPERAND_RIC :
210 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Ric);
211 break;
212 case FR30_OPERAND_RJ :
213 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Rj);
214 break;
215 case FR30_OPERAND_RJC :
216 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Rjc);
217 break;
218 case FR30_OPERAND_RS1 :
219 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_dr_names, & fields->f_Rs1);
220 break;
221 case FR30_OPERAND_RS2 :
222 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_dr_names, & fields->f_Rs2);
223 break;
224 case FR30_OPERAND_CC :
225 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_CC, (unsigned long *) (& fields->f_cc));
226 break;
227 case FR30_OPERAND_CCC :
228 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_CCC, (unsigned long *) (& fields->f_ccc));
229 break;
230 case FR30_OPERAND_DIR10 :
231 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR10, (unsigned long *) (& fields->f_dir10));
232 break;
233 case FR30_OPERAND_DIR8 :
234 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR8, (unsigned long *) (& fields->f_dir8));
235 break;
236 case FR30_OPERAND_DIR9 :
237 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR9, (unsigned long *) (& fields->f_dir9));
238 break;
239 case FR30_OPERAND_DISP10 :
240 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP10, (long *) (& fields->f_disp10));
241 break;
242 case FR30_OPERAND_DISP8 :
243 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP8, (long *) (& fields->f_disp8));
244 break;
245 case FR30_OPERAND_DISP9 :
246 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP9, (long *) (& fields->f_disp9));
247 break;
248 case FR30_OPERAND_I20 :
249 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I20, (unsigned long *) (& fields->f_i20));
250 break;
251 case FR30_OPERAND_I32 :
252 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I32, (unsigned long *) (& fields->f_i32));
253 break;
254 case FR30_OPERAND_I8 :
255 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I8, (unsigned long *) (& fields->f_i8));
256 break;
257 case FR30_OPERAND_LABEL12 :
258 {
259 bfd_vma value = 0;
260 errmsg = cgen_parse_address (cd, strp, FR30_OPERAND_LABEL12, 0, NULL, & value);
261 fields->f_rel12 = value;
262 }
263 break;
264 case FR30_OPERAND_LABEL9 :
265 {
266 bfd_vma value = 0;
267 errmsg = cgen_parse_address (cd, strp, FR30_OPERAND_LABEL9, 0, NULL, & value);
268 fields->f_rel9 = value;
269 }
270 break;
271 case FR30_OPERAND_M4 :
272 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_M4, (long *) (& fields->f_m4));
273 break;
274 case FR30_OPERAND_PS :
275 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_ps, & junk);
276 break;
277 case FR30_OPERAND_REGLIST_HI_LD :
278 errmsg = parse_hi_register_list_ld (cd, strp, FR30_OPERAND_REGLIST_HI_LD, (unsigned long *) (& fields->f_reglist_hi_ld));
279 break;
280 case FR30_OPERAND_REGLIST_HI_ST :
281 errmsg = parse_hi_register_list_st (cd, strp, FR30_OPERAND_REGLIST_HI_ST, (unsigned long *) (& fields->f_reglist_hi_st));
282 break;
283 case FR30_OPERAND_REGLIST_LOW_LD :
284 errmsg = parse_low_register_list_ld (cd, strp, FR30_OPERAND_REGLIST_LOW_LD, (unsigned long *) (& fields->f_reglist_low_ld));
285 break;
286 case FR30_OPERAND_REGLIST_LOW_ST :
287 errmsg = parse_low_register_list_st (cd, strp, FR30_OPERAND_REGLIST_LOW_ST, (unsigned long *) (& fields->f_reglist_low_st));
288 break;
289 case FR30_OPERAND_S10 :
290 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_S10, (long *) (& fields->f_s10));
291 break;
292 case FR30_OPERAND_U10 :
293 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U10, (unsigned long *) (& fields->f_u10));
294 break;
295 case FR30_OPERAND_U4 :
296 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U4, (unsigned long *) (& fields->f_u4));
297 break;
298 case FR30_OPERAND_U4C :
299 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U4C, (unsigned long *) (& fields->f_u4c));
300 break;
301 case FR30_OPERAND_U8 :
302 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U8, (unsigned long *) (& fields->f_u8));
303 break;
304 case FR30_OPERAND_UDISP6 :
305 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_UDISP6, (unsigned long *) (& fields->f_udisp6));
306 break;
307
308 default :
309 /* xgettext:c-format */
310 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
311 abort ();
312 }
313
314 return errmsg;
315 }
316
317 cgen_parse_fn * const fr30_cgen_parse_handlers[] =
318 {
319 parse_insn_normal,
320 };
321
322 void
fr30_cgen_init_asm(CGEN_CPU_DESC cd)323 fr30_cgen_init_asm (CGEN_CPU_DESC cd)
324 {
325 fr30_cgen_init_opcode_table (cd);
326 fr30_cgen_init_ibld_table (cd);
327 cd->parse_handlers = & fr30_cgen_parse_handlers[0];
328 cd->parse_operand = fr30_cgen_parse_operand;
329 #ifdef CGEN_ASM_INIT_HOOK
330 CGEN_ASM_INIT_HOOK
331 #endif
332 }
333
334
335
336 /* Regex construction routine.
337
338 This translates an opcode syntax string into a regex string,
339 by replacing any non-character syntax element (such as an
340 opcode) with the pattern '.*'
341
342 It then compiles the regex and stores it in the opcode, for
343 later use by fr30_cgen_assemble_insn
344
345 Returns NULL for success, an error message for failure. */
346
347 char *
fr30_cgen_build_insn_regex(CGEN_INSN * insn)348 fr30_cgen_build_insn_regex (CGEN_INSN *insn)
349 {
350 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
351 const char *mnem = CGEN_INSN_MNEMONIC (insn);
352 char rxbuf[CGEN_MAX_RX_ELEMENTS];
353 char *rx = rxbuf;
354 const CGEN_SYNTAX_CHAR_TYPE *syn;
355 int reg_err;
356
357 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
358
359 /* Mnemonics come first in the syntax string. */
360 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
361 return _("missing mnemonic in syntax string");
362 ++syn;
363
364 /* Generate a case sensitive regular expression that emulates case
365 insensitive matching in the "C" locale. We cannot generate a case
366 insensitive regular expression because in Turkish locales, 'i' and 'I'
367 are not equal modulo case conversion. */
368
369 /* Copy the literal mnemonic out of the insn. */
370 for (; *mnem; mnem++)
371 {
372 char c = *mnem;
373
374 if (ISALPHA (c))
375 {
376 *rx++ = '[';
377 *rx++ = TOLOWER (c);
378 *rx++ = TOUPPER (c);
379 *rx++ = ']';
380 }
381 else
382 *rx++ = c;
383 }
384
385 /* Copy any remaining literals from the syntax string into the rx. */
386 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
387 {
388 if (CGEN_SYNTAX_CHAR_P (* syn))
389 {
390 char c = CGEN_SYNTAX_CHAR (* syn);
391
392 switch (c)
393 {
394 /* Escape any regex metacharacters in the syntax. */
395 case '.': case '[': case '\\':
396 case '*': case '^': case '$':
397
398 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
399 case '?': case '{': case '}':
400 case '(': case ')': case '*':
401 case '|': case '+': case ']':
402 #endif
403 *rx++ = '\\';
404 *rx++ = c;
405 break;
406
407 default:
408 if (ISALPHA (c))
409 {
410 *rx++ = '[';
411 *rx++ = TOLOWER (c);
412 *rx++ = TOUPPER (c);
413 *rx++ = ']';
414 }
415 else
416 *rx++ = c;
417 break;
418 }
419 }
420 else
421 {
422 /* Replace non-syntax fields with globs. */
423 *rx++ = '.';
424 *rx++ = '*';
425 }
426 }
427
428 /* Trailing whitespace ok. */
429 * rx++ = '[';
430 * rx++ = ' ';
431 * rx++ = '\t';
432 * rx++ = ']';
433 * rx++ = '*';
434
435 /* But anchor it after that. */
436 * rx++ = '$';
437 * rx = '\0';
438
439 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
440 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
441
442 if (reg_err == 0)
443 return NULL;
444 else
445 {
446 static char msg[80];
447
448 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
449 regfree ((regex_t *) CGEN_INSN_RX (insn));
450 free (CGEN_INSN_RX (insn));
451 (CGEN_INSN_RX (insn)) = NULL;
452 return msg;
453 }
454 }
455
456
457 /* Default insn parser.
458
459 The syntax string is scanned and operands are parsed and stored in FIELDS.
460 Relocs are queued as we go via other callbacks.
461
462 ??? Note that this is currently an all-or-nothing parser. If we fail to
463 parse the instruction, we return 0 and the caller will start over from
464 the beginning. Backtracking will be necessary in parsing subexpressions,
465 but that can be handled there. Not handling backtracking here may get
466 expensive in the case of the m68k. Deal with later.
467
468 Returns NULL for success, an error message for failure. */
469
470 static const char *
parse_insn_normal(CGEN_CPU_DESC cd,const CGEN_INSN * insn,const char ** strp,CGEN_FIELDS * fields)471 parse_insn_normal (CGEN_CPU_DESC cd,
472 const CGEN_INSN *insn,
473 const char **strp,
474 CGEN_FIELDS *fields)
475 {
476 /* ??? Runtime added insns not handled yet. */
477 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
478 const char *str = *strp;
479 const char *errmsg;
480 const char *p;
481 const CGEN_SYNTAX_CHAR_TYPE * syn;
482 #ifdef CGEN_MNEMONIC_OPERANDS
483 /* FIXME: wip */
484 int past_opcode_p;
485 #endif
486
487 /* For now we assume the mnemonic is first (there are no leading operands).
488 We can parse it without needing to set up operand parsing.
489 GAS's input scrubber will ensure mnemonics are lowercase, but we may
490 not be called from GAS. */
491 p = CGEN_INSN_MNEMONIC (insn);
492 while (*p && TOLOWER (*p) == TOLOWER (*str))
493 ++p, ++str;
494
495 if (* p)
496 return _("unrecognized instruction");
497
498 #ifndef CGEN_MNEMONIC_OPERANDS
499 if (* str && ! ISSPACE (* str))
500 return _("unrecognized instruction");
501 #endif
502
503 CGEN_INIT_PARSE (cd);
504 cgen_init_parse_operand (cd);
505 #ifdef CGEN_MNEMONIC_OPERANDS
506 past_opcode_p = 0;
507 #endif
508
509 /* We don't check for (*str != '\0') here because we want to parse
510 any trailing fake arguments in the syntax string. */
511 syn = CGEN_SYNTAX_STRING (syntax);
512
513 /* Mnemonics come first for now, ensure valid string. */
514 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
515 abort ();
516
517 ++syn;
518
519 while (* syn != 0)
520 {
521 /* Non operand chars must match exactly. */
522 if (CGEN_SYNTAX_CHAR_P (* syn))
523 {
524 /* FIXME: While we allow for non-GAS callers above, we assume the
525 first char after the mnemonic part is a space. */
526 /* FIXME: We also take inappropriate advantage of the fact that
527 GAS's input scrubber will remove extraneous blanks. */
528 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
529 {
530 #ifdef CGEN_MNEMONIC_OPERANDS
531 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
532 past_opcode_p = 1;
533 #endif
534 ++ syn;
535 ++ str;
536 }
537 else if (*str)
538 {
539 /* Syntax char didn't match. Can't be this insn. */
540 static char msg [80];
541
542 /* xgettext:c-format */
543 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
544 CGEN_SYNTAX_CHAR(*syn), *str);
545 return msg;
546 }
547 else
548 {
549 /* Ran out of input. */
550 static char msg [80];
551
552 /* xgettext:c-format */
553 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
554 CGEN_SYNTAX_CHAR(*syn));
555 return msg;
556 }
557 continue;
558 }
559
560 #ifdef CGEN_MNEMONIC_OPERANDS
561 (void) past_opcode_p;
562 #endif
563 /* We have an operand of some sort. */
564 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
565 if (errmsg)
566 return errmsg;
567
568 /* Done with this operand, continue with next one. */
569 ++ syn;
570 }
571
572 /* If we're at the end of the syntax string, we're done. */
573 if (* syn == 0)
574 {
575 /* FIXME: For the moment we assume a valid `str' can only contain
576 blanks now. IE: We needn't try again with a longer version of
577 the insn and it is assumed that longer versions of insns appear
578 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
579 while (ISSPACE (* str))
580 ++ str;
581
582 if (* str != '\0')
583 return _("junk at end of line"); /* FIXME: would like to include `str' */
584
585 return NULL;
586 }
587
588 /* We couldn't parse it. */
589 return _("unrecognized instruction");
590 }
591
592 /* Main entry point.
593 This routine is called for each instruction to be assembled.
594 STR points to the insn to be assembled.
595 We assume all necessary tables have been initialized.
596 The assembled instruction, less any fixups, is stored in BUF.
597 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
598 still needs to be converted to target byte order, otherwise BUF is an array
599 of bytes in target byte order.
600 The result is a pointer to the insn's entry in the opcode table,
601 or NULL if an error occured (an error message will have already been
602 printed).
603
604 Note that when processing (non-alias) macro-insns,
605 this function recurses.
606
607 ??? It's possible to make this cpu-independent.
608 One would have to deal with a few minor things.
609 At this point in time doing so would be more of a curiosity than useful
610 [for example this file isn't _that_ big], but keeping the possibility in
611 mind helps keep the design clean. */
612
613 const CGEN_INSN *
fr30_cgen_assemble_insn(CGEN_CPU_DESC cd,const char * str,CGEN_FIELDS * fields,CGEN_INSN_BYTES_PTR buf,char ** errmsg)614 fr30_cgen_assemble_insn (CGEN_CPU_DESC cd,
615 const char *str,
616 CGEN_FIELDS *fields,
617 CGEN_INSN_BYTES_PTR buf,
618 char **errmsg)
619 {
620 const char *start;
621 CGEN_INSN_LIST *ilist;
622 const char *parse_errmsg = NULL;
623 const char *insert_errmsg = NULL;
624 int recognized_mnemonic = 0;
625
626 /* Skip leading white space. */
627 while (ISSPACE (* str))
628 ++ str;
629
630 /* The instructions are stored in hashed lists.
631 Get the first in the list. */
632 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
633
634 /* Keep looking until we find a match. */
635 start = str;
636 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
637 {
638 const CGEN_INSN *insn = ilist->insn;
639 recognized_mnemonic = 1;
640
641 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
642 /* Not usually needed as unsupported opcodes
643 shouldn't be in the hash lists. */
644 /* Is this insn supported by the selected cpu? */
645 if (! fr30_cgen_insn_supported (cd, insn))
646 continue;
647 #endif
648 /* If the RELAXED attribute is set, this is an insn that shouldn't be
649 chosen immediately. Instead, it is used during assembler/linker
650 relaxation if possible. */
651 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
652 continue;
653
654 str = start;
655
656 /* Skip this insn if str doesn't look right lexically. */
657 if (CGEN_INSN_RX (insn) != NULL &&
658 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
659 continue;
660
661 /* Allow parse/insert handlers to obtain length of insn. */
662 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
663
664 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
665 if (parse_errmsg != NULL)
666 continue;
667
668 /* ??? 0 is passed for `pc'. */
669 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
670 (bfd_vma) 0);
671 if (insert_errmsg != NULL)
672 continue;
673
674 /* It is up to the caller to actually output the insn and any
675 queued relocs. */
676 return insn;
677 }
678
679 {
680 static char errbuf[150];
681 const char *tmp_errmsg;
682 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
683 #define be_verbose 1
684 #else
685 #define be_verbose 0
686 #endif
687
688 if (be_verbose)
689 {
690 /* If requesting verbose error messages, use insert_errmsg.
691 Failing that, use parse_errmsg. */
692 tmp_errmsg = (insert_errmsg ? insert_errmsg :
693 parse_errmsg ? parse_errmsg :
694 recognized_mnemonic ?
695 _("unrecognized form of instruction") :
696 _("unrecognized instruction"));
697
698 if (strlen (start) > 50)
699 /* xgettext:c-format */
700 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
701 else
702 /* xgettext:c-format */
703 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
704 }
705 else
706 {
707 if (strlen (start) > 50)
708 /* xgettext:c-format */
709 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
710 else
711 /* xgettext:c-format */
712 sprintf (errbuf, _("bad instruction `%.50s'"), start);
713 }
714
715 *errmsg = errbuf;
716 return NULL;
717 }
718 }
719