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84e94c90 NC |
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 | ||
4b95cf5c | 7 | Copyright (C) 1996-2014 Free Software Foundation, Inc. |
84e94c90 NC |
8 | |
9 | This file is part of libopcodes. | |
10 | ||
11 | This library 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 3, or (at your option) | |
14 | any later version. | |
15 | ||
16 | It is distributed in the hope that it will be useful, but WITHOUT | |
17 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
18 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
19 | 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 | 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ | |
24 | ||
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 "lm32-desc.h" | |
35 | #include "lm32-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 | \f | |
49 | /* -- assembler routines inserted here. */ | |
50 | ||
51 | /* -- asm.c */ | |
52 | ||
53 | /* Handle signed/unsigned literal. */ | |
54 | ||
55 | static const char * | |
56 | parse_imm (CGEN_CPU_DESC cd, | |
57 | const char **strp, | |
58 | int opindex, | |
59 | unsigned long *valuep) | |
60 | { | |
61 | const char *errmsg; | |
62 | signed long value; | |
63 | ||
64 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value); | |
65 | if (errmsg == NULL) | |
66 | { | |
67 | unsigned long x = value & 0xFFFF0000; | |
68 | if (x != 0 && x != 0xFFFF0000) | |
69 | errmsg = _("immediate value out of range"); | |
70 | else | |
71 | *valuep = (value & 0xFFFF); | |
72 | } | |
73 | return errmsg; | |
74 | } | |
75 | ||
76 | /* Handle hi() */ | |
77 | ||
78 | static const char * | |
79 | parse_hi16 (CGEN_CPU_DESC cd, | |
80 | const char **strp, | |
81 | int opindex, | |
82 | unsigned long *valuep) | |
83 | { | |
84 | if (strncasecmp (*strp, "hi(", 3) == 0) | |
85 | { | |
86 | enum cgen_parse_operand_result result_type; | |
87 | bfd_vma value; | |
88 | const char *errmsg; | |
89 | ||
90 | *strp += 3; | |
91 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16, | |
92 | &result_type, &value); | |
93 | if (**strp != ')') | |
94 | return _("missing `)'"); | |
95 | ||
96 | ++*strp; | |
97 | if (errmsg == NULL | |
98 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
99 | value = (value >> 16) & 0xffff; | |
100 | *valuep = value; | |
101 | ||
102 | return errmsg; | |
103 | } | |
104 | ||
105 | return parse_imm (cd, strp, opindex, valuep); | |
106 | } | |
107 | ||
108 | /* Handle lo() */ | |
109 | ||
110 | static const char * | |
111 | parse_lo16 (CGEN_CPU_DESC cd, | |
112 | const char **strp, | |
113 | int opindex, | |
114 | unsigned long *valuep) | |
115 | { | |
116 | if (strncasecmp (*strp, "lo(", 3) == 0) | |
117 | { | |
118 | const char *errmsg; | |
119 | enum cgen_parse_operand_result result_type; | |
120 | bfd_vma value; | |
121 | ||
122 | *strp += 3; | |
123 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, | |
124 | &result_type, &value); | |
125 | if (**strp != ')') | |
126 | return _("missing `)'"); | |
127 | ++*strp; | |
128 | if (errmsg == NULL | |
129 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
130 | value &= 0xffff; | |
131 | *valuep = value; | |
132 | return errmsg; | |
133 | } | |
134 | ||
135 | return parse_imm (cd, strp, opindex, valuep); | |
136 | } | |
137 | ||
138 | /* Handle gp() */ | |
139 | ||
140 | static const char * | |
141 | parse_gp16 (CGEN_CPU_DESC cd, | |
142 | const char **strp, | |
143 | int opindex, | |
144 | long *valuep) | |
145 | { | |
146 | if (strncasecmp (*strp, "gp(", 3) == 0) | |
147 | { | |
148 | const char *errmsg; | |
149 | enum cgen_parse_operand_result result_type; | |
150 | bfd_vma value; | |
151 | ||
152 | *strp += 3; | |
153 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_GPREL16, | |
154 | & result_type, & value); | |
155 | if (**strp != ')') | |
156 | return _("missing `)'"); | |
157 | ++*strp; | |
158 | if (errmsg == NULL | |
159 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
160 | value &= 0xffff; | |
161 | *valuep = value; | |
162 | return errmsg; | |
163 | } | |
164 | ||
165 | return _("expecting gp relative address: gp(symbol)"); | |
166 | } | |
167 | ||
168 | /* Handle got() */ | |
169 | ||
170 | static const char * | |
171 | parse_got16 (CGEN_CPU_DESC cd, | |
172 | const char **strp, | |
173 | int opindex, | |
174 | long *valuep) | |
175 | { | |
176 | if (strncasecmp (*strp, "got(", 4) == 0) | |
177 | { | |
178 | const char *errmsg; | |
179 | enum cgen_parse_operand_result result_type; | |
180 | bfd_vma value; | |
181 | ||
182 | *strp += 4; | |
183 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LM32_16_GOT, | |
184 | & result_type, & value); | |
185 | if (**strp != ')') | |
186 | return _("missing `)'"); | |
187 | ++*strp; | |
188 | if (errmsg == NULL | |
189 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
190 | value &= 0xffff; | |
191 | *valuep = value; | |
192 | return errmsg; | |
193 | } | |
194 | ||
195 | return _("expecting got relative address: got(symbol)"); | |
196 | } | |
197 | ||
198 | /* Handle gotoffhi16() */ | |
199 | ||
200 | static const char * | |
201 | parse_gotoff_hi16 (CGEN_CPU_DESC cd, | |
202 | const char **strp, | |
203 | int opindex, | |
204 | long *valuep) | |
205 | { | |
206 | if (strncasecmp (*strp, "gotoffhi16(", 11) == 0) | |
207 | { | |
208 | const char *errmsg; | |
209 | enum cgen_parse_operand_result result_type; | |
210 | bfd_vma value; | |
211 | ||
212 | *strp += 11; | |
213 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LM32_GOTOFF_HI16, | |
214 | & result_type, & value); | |
215 | if (**strp != ')') | |
216 | return _("missing `)'"); | |
217 | ++*strp; | |
218 | if (errmsg == NULL | |
219 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
220 | value &= 0xffff; | |
221 | *valuep = value; | |
222 | return errmsg; | |
223 | } | |
224 | ||
225 | return _("expecting got relative address: gotoffhi16(symbol)"); | |
226 | } | |
227 | ||
228 | /* Handle gotofflo16() */ | |
229 | ||
230 | static const char * | |
231 | parse_gotoff_lo16 (CGEN_CPU_DESC cd, | |
232 | const char **strp, | |
233 | int opindex, | |
234 | long *valuep) | |
235 | { | |
236 | if (strncasecmp (*strp, "gotofflo16(", 11) == 0) | |
237 | { | |
238 | const char *errmsg; | |
239 | enum cgen_parse_operand_result result_type; | |
240 | bfd_vma value; | |
241 | ||
242 | *strp += 11; | |
243 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LM32_GOTOFF_LO16, | |
244 | &result_type, &value); | |
245 | if (**strp != ')') | |
246 | return _("missing `)'"); | |
247 | ++*strp; | |
248 | if (errmsg == NULL | |
249 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
250 | value &= 0xffff; | |
251 | *valuep = value; | |
252 | return errmsg; | |
253 | } | |
254 | ||
255 | return _("expecting got relative address: gotofflo16(symbol)"); | |
256 | } | |
257 | ||
258 | const char * lm32_cgen_parse_operand | |
259 | (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); | |
260 | ||
261 | /* Main entry point for operand parsing. | |
262 | ||
263 | This function is basically just a big switch statement. Earlier versions | |
264 | used tables to look up the function to use, but | |
265 | - if the table contains both assembler and disassembler functions then | |
266 | the disassembler contains much of the assembler and vice-versa, | |
267 | - there's a lot of inlining possibilities as things grow, | |
268 | - using a switch statement avoids the function call overhead. | |
269 | ||
270 | This function could be moved into `parse_insn_normal', but keeping it | |
271 | separate makes clear the interface between `parse_insn_normal' and each of | |
272 | the handlers. */ | |
273 | ||
274 | const char * | |
275 | lm32_cgen_parse_operand (CGEN_CPU_DESC cd, | |
276 | int opindex, | |
277 | const char ** strp, | |
278 | CGEN_FIELDS * fields) | |
279 | { | |
280 | const char * errmsg = NULL; | |
281 | /* Used by scalar operands that still need to be parsed. */ | |
282 | long junk ATTRIBUTE_UNUSED; | |
283 | ||
284 | switch (opindex) | |
285 | { | |
286 | case LM32_OPERAND_BRANCH : | |
287 | { | |
288 | bfd_vma value = 0; | |
289 | errmsg = cgen_parse_address (cd, strp, LM32_OPERAND_BRANCH, 0, NULL, & value); | |
290 | fields->f_branch = value; | |
291 | } | |
292 | break; | |
293 | case LM32_OPERAND_CALL : | |
294 | { | |
295 | bfd_vma value = 0; | |
296 | errmsg = cgen_parse_address (cd, strp, LM32_OPERAND_CALL, 0, NULL, & value); | |
297 | fields->f_call = value; | |
298 | } | |
299 | break; | |
300 | case LM32_OPERAND_CSR : | |
301 | errmsg = cgen_parse_keyword (cd, strp, & lm32_cgen_opval_h_csr, & fields->f_csr); | |
302 | break; | |
303 | case LM32_OPERAND_EXCEPTION : | |
304 | errmsg = cgen_parse_unsigned_integer (cd, strp, LM32_OPERAND_EXCEPTION, (unsigned long *) (& fields->f_exception)); | |
305 | break; | |
306 | case LM32_OPERAND_GOT16 : | |
307 | errmsg = parse_got16 (cd, strp, LM32_OPERAND_GOT16, (long *) (& fields->f_imm)); | |
308 | break; | |
309 | case LM32_OPERAND_GOTOFFHI16 : | |
310 | errmsg = parse_gotoff_hi16 (cd, strp, LM32_OPERAND_GOTOFFHI16, (long *) (& fields->f_imm)); | |
311 | break; | |
312 | case LM32_OPERAND_GOTOFFLO16 : | |
313 | errmsg = parse_gotoff_lo16 (cd, strp, LM32_OPERAND_GOTOFFLO16, (long *) (& fields->f_imm)); | |
314 | break; | |
315 | case LM32_OPERAND_GP16 : | |
316 | errmsg = parse_gp16 (cd, strp, LM32_OPERAND_GP16, (long *) (& fields->f_imm)); | |
317 | break; | |
318 | case LM32_OPERAND_HI16 : | |
319 | errmsg = parse_hi16 (cd, strp, LM32_OPERAND_HI16, (unsigned long *) (& fields->f_uimm)); | |
320 | break; | |
321 | case LM32_OPERAND_IMM : | |
322 | errmsg = cgen_parse_signed_integer (cd, strp, LM32_OPERAND_IMM, (long *) (& fields->f_imm)); | |
323 | break; | |
324 | case LM32_OPERAND_LO16 : | |
325 | errmsg = parse_lo16 (cd, strp, LM32_OPERAND_LO16, (unsigned long *) (& fields->f_uimm)); | |
326 | break; | |
327 | case LM32_OPERAND_R0 : | |
328 | errmsg = cgen_parse_keyword (cd, strp, & lm32_cgen_opval_h_gr, & fields->f_r0); | |
329 | break; | |
330 | case LM32_OPERAND_R1 : | |
331 | errmsg = cgen_parse_keyword (cd, strp, & lm32_cgen_opval_h_gr, & fields->f_r1); | |
332 | break; | |
333 | case LM32_OPERAND_R2 : | |
334 | errmsg = cgen_parse_keyword (cd, strp, & lm32_cgen_opval_h_gr, & fields->f_r2); | |
335 | break; | |
336 | case LM32_OPERAND_SHIFT : | |
337 | errmsg = cgen_parse_unsigned_integer (cd, strp, LM32_OPERAND_SHIFT, (unsigned long *) (& fields->f_shift)); | |
338 | break; | |
339 | case LM32_OPERAND_UIMM : | |
340 | errmsg = cgen_parse_unsigned_integer (cd, strp, LM32_OPERAND_UIMM, (unsigned long *) (& fields->f_uimm)); | |
341 | break; | |
342 | case LM32_OPERAND_USER : | |
343 | errmsg = cgen_parse_unsigned_integer (cd, strp, LM32_OPERAND_USER, (unsigned long *) (& fields->f_user)); | |
344 | break; | |
345 | ||
346 | default : | |
347 | /* xgettext:c-format */ | |
348 | fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); | |
349 | abort (); | |
350 | } | |
351 | ||
352 | return errmsg; | |
353 | } | |
354 | ||
355 | cgen_parse_fn * const lm32_cgen_parse_handlers[] = | |
356 | { | |
357 | parse_insn_normal, | |
358 | }; | |
359 | ||
360 | void | |
361 | lm32_cgen_init_asm (CGEN_CPU_DESC cd) | |
362 | { | |
363 | lm32_cgen_init_opcode_table (cd); | |
364 | lm32_cgen_init_ibld_table (cd); | |
365 | cd->parse_handlers = & lm32_cgen_parse_handlers[0]; | |
366 | cd->parse_operand = lm32_cgen_parse_operand; | |
367 | #ifdef CGEN_ASM_INIT_HOOK | |
368 | CGEN_ASM_INIT_HOOK | |
369 | #endif | |
370 | } | |
371 | ||
372 | \f | |
373 | ||
374 | /* Regex construction routine. | |
375 | ||
376 | This translates an opcode syntax string into a regex string, | |
377 | by replacing any non-character syntax element (such as an | |
378 | opcode) with the pattern '.*' | |
379 | ||
380 | It then compiles the regex and stores it in the opcode, for | |
381 | later use by lm32_cgen_assemble_insn | |
382 | ||
383 | Returns NULL for success, an error message for failure. */ | |
384 | ||
385 | char * | |
386 | lm32_cgen_build_insn_regex (CGEN_INSN *insn) | |
387 | { | |
388 | CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); | |
389 | const char *mnem = CGEN_INSN_MNEMONIC (insn); | |
390 | char rxbuf[CGEN_MAX_RX_ELEMENTS]; | |
391 | char *rx = rxbuf; | |
392 | const CGEN_SYNTAX_CHAR_TYPE *syn; | |
393 | int reg_err; | |
394 | ||
395 | syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); | |
396 | ||
397 | /* Mnemonics come first in the syntax string. */ | |
398 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
399 | return _("missing mnemonic in syntax string"); | |
400 | ++syn; | |
401 | ||
402 | /* Generate a case sensitive regular expression that emulates case | |
403 | insensitive matching in the "C" locale. We cannot generate a case | |
404 | insensitive regular expression because in Turkish locales, 'i' and 'I' | |
405 | are not equal modulo case conversion. */ | |
406 | ||
407 | /* Copy the literal mnemonic out of the insn. */ | |
408 | for (; *mnem; mnem++) | |
409 | { | |
410 | char c = *mnem; | |
411 | ||
412 | if (ISALPHA (c)) | |
413 | { | |
414 | *rx++ = '['; | |
415 | *rx++ = TOLOWER (c); | |
416 | *rx++ = TOUPPER (c); | |
417 | *rx++ = ']'; | |
418 | } | |
419 | else | |
420 | *rx++ = c; | |
421 | } | |
422 | ||
423 | /* Copy any remaining literals from the syntax string into the rx. */ | |
424 | for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) | |
425 | { | |
426 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
427 | { | |
428 | char c = CGEN_SYNTAX_CHAR (* syn); | |
429 | ||
430 | switch (c) | |
431 | { | |
432 | /* Escape any regex metacharacters in the syntax. */ | |
433 | case '.': case '[': case '\\': | |
434 | case '*': case '^': case '$': | |
435 | ||
436 | #ifdef CGEN_ESCAPE_EXTENDED_REGEX | |
437 | case '?': case '{': case '}': | |
438 | case '(': case ')': case '*': | |
439 | case '|': case '+': case ']': | |
440 | #endif | |
441 | *rx++ = '\\'; | |
442 | *rx++ = c; | |
443 | break; | |
444 | ||
445 | default: | |
446 | if (ISALPHA (c)) | |
447 | { | |
448 | *rx++ = '['; | |
449 | *rx++ = TOLOWER (c); | |
450 | *rx++ = TOUPPER (c); | |
451 | *rx++ = ']'; | |
452 | } | |
453 | else | |
454 | *rx++ = c; | |
455 | break; | |
456 | } | |
457 | } | |
458 | else | |
459 | { | |
460 | /* Replace non-syntax fields with globs. */ | |
461 | *rx++ = '.'; | |
462 | *rx++ = '*'; | |
463 | } | |
464 | } | |
465 | ||
466 | /* Trailing whitespace ok. */ | |
467 | * rx++ = '['; | |
468 | * rx++ = ' '; | |
469 | * rx++ = '\t'; | |
470 | * rx++ = ']'; | |
471 | * rx++ = '*'; | |
472 | ||
473 | /* But anchor it after that. */ | |
474 | * rx++ = '$'; | |
475 | * rx = '\0'; | |
476 | ||
477 | CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); | |
478 | reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); | |
479 | ||
480 | if (reg_err == 0) | |
481 | return NULL; | |
482 | else | |
483 | { | |
484 | static char msg[80]; | |
485 | ||
486 | regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); | |
487 | regfree ((regex_t *) CGEN_INSN_RX (insn)); | |
488 | free (CGEN_INSN_RX (insn)); | |
489 | (CGEN_INSN_RX (insn)) = NULL; | |
490 | return msg; | |
491 | } | |
492 | } | |
493 | ||
494 | \f | |
495 | /* Default insn parser. | |
496 | ||
497 | The syntax string is scanned and operands are parsed and stored in FIELDS. | |
498 | Relocs are queued as we go via other callbacks. | |
499 | ||
500 | ??? Note that this is currently an all-or-nothing parser. If we fail to | |
501 | parse the instruction, we return 0 and the caller will start over from | |
502 | the beginning. Backtracking will be necessary in parsing subexpressions, | |
503 | but that can be handled there. Not handling backtracking here may get | |
504 | expensive in the case of the m68k. Deal with later. | |
505 | ||
506 | Returns NULL for success, an error message for failure. */ | |
507 | ||
508 | static const char * | |
509 | parse_insn_normal (CGEN_CPU_DESC cd, | |
510 | const CGEN_INSN *insn, | |
511 | const char **strp, | |
512 | CGEN_FIELDS *fields) | |
513 | { | |
514 | /* ??? Runtime added insns not handled yet. */ | |
515 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
516 | const char *str = *strp; | |
517 | const char *errmsg; | |
518 | const char *p; | |
519 | const CGEN_SYNTAX_CHAR_TYPE * syn; | |
520 | #ifdef CGEN_MNEMONIC_OPERANDS | |
521 | /* FIXME: wip */ | |
522 | int past_opcode_p; | |
523 | #endif | |
524 | ||
525 | /* For now we assume the mnemonic is first (there are no leading operands). | |
526 | We can parse it without needing to set up operand parsing. | |
527 | GAS's input scrubber will ensure mnemonics are lowercase, but we may | |
528 | not be called from GAS. */ | |
529 | p = CGEN_INSN_MNEMONIC (insn); | |
530 | while (*p && TOLOWER (*p) == TOLOWER (*str)) | |
531 | ++p, ++str; | |
532 | ||
533 | if (* p) | |
534 | return _("unrecognized instruction"); | |
535 | ||
536 | #ifndef CGEN_MNEMONIC_OPERANDS | |
537 | if (* str && ! ISSPACE (* str)) | |
538 | return _("unrecognized instruction"); | |
539 | #endif | |
540 | ||
541 | CGEN_INIT_PARSE (cd); | |
542 | cgen_init_parse_operand (cd); | |
543 | #ifdef CGEN_MNEMONIC_OPERANDS | |
544 | past_opcode_p = 0; | |
545 | #endif | |
546 | ||
547 | /* We don't check for (*str != '\0') here because we want to parse | |
548 | any trailing fake arguments in the syntax string. */ | |
549 | syn = CGEN_SYNTAX_STRING (syntax); | |
550 | ||
551 | /* Mnemonics come first for now, ensure valid string. */ | |
552 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
553 | abort (); | |
554 | ||
555 | ++syn; | |
556 | ||
557 | while (* syn != 0) | |
558 | { | |
559 | /* Non operand chars must match exactly. */ | |
560 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
561 | { | |
562 | /* FIXME: While we allow for non-GAS callers above, we assume the | |
563 | first char after the mnemonic part is a space. */ | |
564 | /* FIXME: We also take inappropriate advantage of the fact that | |
565 | GAS's input scrubber will remove extraneous blanks. */ | |
566 | if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) | |
567 | { | |
568 | #ifdef CGEN_MNEMONIC_OPERANDS | |
569 | if (CGEN_SYNTAX_CHAR(* syn) == ' ') | |
570 | past_opcode_p = 1; | |
571 | #endif | |
572 | ++ syn; | |
573 | ++ str; | |
574 | } | |
575 | else if (*str) | |
576 | { | |
577 | /* Syntax char didn't match. Can't be this insn. */ | |
578 | static char msg [80]; | |
579 | ||
580 | /* xgettext:c-format */ | |
581 | sprintf (msg, _("syntax error (expected char `%c', found `%c')"), | |
582 | CGEN_SYNTAX_CHAR(*syn), *str); | |
583 | return msg; | |
584 | } | |
585 | else | |
586 | { | |
587 | /* Ran out of input. */ | |
588 | static char msg [80]; | |
589 | ||
590 | /* xgettext:c-format */ | |
591 | sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), | |
592 | CGEN_SYNTAX_CHAR(*syn)); | |
593 | return msg; | |
594 | } | |
595 | continue; | |
596 | } | |
597 | ||
c7e2358a AM |
598 | #ifdef CGEN_MNEMONIC_OPERANDS |
599 | (void) past_opcode_p; | |
600 | #endif | |
84e94c90 | 601 | /* We have an operand of some sort. */ |
c7e2358a | 602 | errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields); |
84e94c90 NC |
603 | if (errmsg) |
604 | return errmsg; | |
605 | ||
606 | /* Done with this operand, continue with next one. */ | |
607 | ++ syn; | |
608 | } | |
609 | ||
610 | /* If we're at the end of the syntax string, we're done. */ | |
611 | if (* syn == 0) | |
612 | { | |
613 | /* FIXME: For the moment we assume a valid `str' can only contain | |
614 | blanks now. IE: We needn't try again with a longer version of | |
615 | the insn and it is assumed that longer versions of insns appear | |
616 | before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ | |
617 | while (ISSPACE (* str)) | |
618 | ++ str; | |
619 | ||
620 | if (* str != '\0') | |
621 | return _("junk at end of line"); /* FIXME: would like to include `str' */ | |
622 | ||
623 | return NULL; | |
624 | } | |
625 | ||
626 | /* We couldn't parse it. */ | |
627 | return _("unrecognized instruction"); | |
628 | } | |
629 | \f | |
630 | /* Main entry point. | |
631 | This routine is called for each instruction to be assembled. | |
632 | STR points to the insn to be assembled. | |
633 | We assume all necessary tables have been initialized. | |
634 | The assembled instruction, less any fixups, is stored in BUF. | |
635 | Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value | |
636 | still needs to be converted to target byte order, otherwise BUF is an array | |
637 | of bytes in target byte order. | |
638 | The result is a pointer to the insn's entry in the opcode table, | |
639 | or NULL if an error occured (an error message will have already been | |
640 | printed). | |
641 | ||
642 | Note that when processing (non-alias) macro-insns, | |
643 | this function recurses. | |
644 | ||
645 | ??? It's possible to make this cpu-independent. | |
646 | One would have to deal with a few minor things. | |
647 | At this point in time doing so would be more of a curiosity than useful | |
648 | [for example this file isn't _that_ big], but keeping the possibility in | |
649 | mind helps keep the design clean. */ | |
650 | ||
651 | const CGEN_INSN * | |
652 | lm32_cgen_assemble_insn (CGEN_CPU_DESC cd, | |
653 | const char *str, | |
654 | CGEN_FIELDS *fields, | |
655 | CGEN_INSN_BYTES_PTR buf, | |
656 | char **errmsg) | |
657 | { | |
658 | const char *start; | |
659 | CGEN_INSN_LIST *ilist; | |
660 | const char *parse_errmsg = NULL; | |
661 | const char *insert_errmsg = NULL; | |
662 | int recognized_mnemonic = 0; | |
663 | ||
664 | /* Skip leading white space. */ | |
665 | while (ISSPACE (* str)) | |
666 | ++ str; | |
667 | ||
668 | /* The instructions are stored in hashed lists. | |
669 | Get the first in the list. */ | |
670 | ilist = CGEN_ASM_LOOKUP_INSN (cd, str); | |
671 | ||
672 | /* Keep looking until we find a match. */ | |
673 | start = str; | |
674 | for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) | |
675 | { | |
676 | const CGEN_INSN *insn = ilist->insn; | |
677 | recognized_mnemonic = 1; | |
678 | ||
679 | #ifdef CGEN_VALIDATE_INSN_SUPPORTED | |
680 | /* Not usually needed as unsupported opcodes | |
681 | shouldn't be in the hash lists. */ | |
682 | /* Is this insn supported by the selected cpu? */ | |
683 | if (! lm32_cgen_insn_supported (cd, insn)) | |
684 | continue; | |
685 | #endif | |
686 | /* If the RELAXED attribute is set, this is an insn that shouldn't be | |
687 | chosen immediately. Instead, it is used during assembler/linker | |
688 | relaxation if possible. */ | |
689 | if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0) | |
690 | continue; | |
691 | ||
692 | str = start; | |
693 | ||
694 | /* Skip this insn if str doesn't look right lexically. */ | |
695 | if (CGEN_INSN_RX (insn) != NULL && | |
696 | regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) | |
697 | continue; | |
698 | ||
699 | /* Allow parse/insert handlers to obtain length of insn. */ | |
700 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); | |
701 | ||
702 | parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); | |
703 | if (parse_errmsg != NULL) | |
704 | continue; | |
705 | ||
706 | /* ??? 0 is passed for `pc'. */ | |
707 | insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, | |
708 | (bfd_vma) 0); | |
709 | if (insert_errmsg != NULL) | |
710 | continue; | |
711 | ||
712 | /* It is up to the caller to actually output the insn and any | |
713 | queued relocs. */ | |
714 | return insn; | |
715 | } | |
716 | ||
717 | { | |
718 | static char errbuf[150]; | |
84e94c90 | 719 | const char *tmp_errmsg; |
c7e2358a AM |
720 | #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS |
721 | #define be_verbose 1 | |
84e94c90 | 722 | #else |
c7e2358a | 723 | #define be_verbose 0 |
84e94c90 | 724 | #endif |
c7e2358a AM |
725 | |
726 | if (be_verbose) | |
727 | { | |
728 | /* If requesting verbose error messages, use insert_errmsg. | |
729 | Failing that, use parse_errmsg. */ | |
730 | tmp_errmsg = (insert_errmsg ? insert_errmsg : | |
731 | parse_errmsg ? parse_errmsg : | |
732 | recognized_mnemonic ? | |
733 | _("unrecognized form of instruction") : | |
734 | _("unrecognized instruction")); | |
735 | ||
736 | if (strlen (start) > 50) | |
737 | /* xgettext:c-format */ | |
738 | sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); | |
739 | else | |
740 | /* xgettext:c-format */ | |
741 | sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); | |
742 | } | |
743 | else | |
744 | { | |
745 | if (strlen (start) > 50) | |
746 | /* xgettext:c-format */ | |
747 | sprintf (errbuf, _("bad instruction `%.50s...'"), start); | |
748 | else | |
749 | /* xgettext:c-format */ | |
750 | sprintf (errbuf, _("bad instruction `%.50s'"), start); | |
751 | } | |
84e94c90 NC |
752 | |
753 | *errmsg = errbuf; | |
754 | return NULL; | |
755 | } | |
756 | } |