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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 | |
8 | Free Software Foundation, Inc. | |
9 | ||
10 | This file is part of the GNU Binutils and GDB, the GNU debugger. | |
11 | ||
12 | This program 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 2, or (at your option) | |
15 | any later version. | |
16 | ||
17 | This program is distributed in the hope that it will be useful, | |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | GNU General Public 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 | /* ??? 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 "mep-desc.h" | |
35 | #include "mep-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 | #define CGEN_VALIDATE_INSN_SUPPORTED | |
54 | ||
55 | const char * parse_csrn (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *); | |
56 | const char * parse_tpreg (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *); | |
57 | const char * parse_spreg (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *); | |
58 | const char * parse_mep_align (CGEN_CPU_DESC, const char **, enum cgen_operand_type, long *); | |
59 | const char * parse_mep_alignu (CGEN_CPU_DESC, const char **, enum cgen_operand_type, unsigned long *); | |
60 | static const char * parse_signed16 (CGEN_CPU_DESC, const char **, int, long *); | |
61 | static const char * parse_unsigned16 (CGEN_CPU_DESC, const char **, int, unsigned long *); | |
62 | static const char * parse_lo16 (CGEN_CPU_DESC, const char **, int, long *, long); | |
63 | static const char * parse_unsigned7 (CGEN_CPU_DESC, const char **, enum cgen_operand_type, unsigned long *); | |
64 | static const char * parse_zero (CGEN_CPU_DESC, const char **, int, long *); | |
65 | ||
66 | const char * | |
67 | parse_csrn (CGEN_CPU_DESC cd, const char **strp, | |
68 | CGEN_KEYWORD *keyword_table, long *field) | |
69 | { | |
70 | const char *err; | |
71 | unsigned long value; | |
72 | ||
73 | err = cgen_parse_keyword (cd, strp, keyword_table, field); | |
74 | if (!err) | |
75 | return NULL; | |
76 | ||
77 | err = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CSRN_IDX, & value); | |
78 | if (err) | |
79 | return err; | |
80 | *field = value; | |
81 | return NULL; | |
82 | } | |
83 | ||
84 | /* begin-cop-ip-parse-handlers */ | |
85 | static const char * | |
86 | parse_fmax_cr (CGEN_CPU_DESC cd, | |
87 | const char **strp, | |
88 | CGEN_KEYWORD *keyword_table ATTRIBUTE_UNUSED, | |
89 | long *field) | |
90 | { | |
91 | return cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr_fmax, field); | |
92 | } | |
93 | static const char * | |
94 | parse_fmax_ccr (CGEN_CPU_DESC cd, | |
95 | const char **strp, | |
96 | CGEN_KEYWORD *keyword_table ATTRIBUTE_UNUSED, | |
97 | long *field) | |
98 | { | |
99 | return cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_fmax, field); | |
100 | } | |
101 | /* end-cop-ip-parse-handlers */ | |
102 | ||
103 | const char * | |
104 | parse_tpreg (CGEN_CPU_DESC cd, const char ** strp, | |
105 | CGEN_KEYWORD *keyword_table, long *field) | |
106 | { | |
107 | const char *err; | |
108 | ||
109 | err = cgen_parse_keyword (cd, strp, keyword_table, field); | |
110 | if (err) | |
111 | return err; | |
112 | if (*field != 13) | |
113 | return _("Only $tp or $13 allowed for this opcode"); | |
114 | return NULL; | |
115 | } | |
116 | ||
117 | const char * | |
118 | parse_spreg (CGEN_CPU_DESC cd, const char ** strp, | |
119 | CGEN_KEYWORD *keyword_table, long *field) | |
120 | { | |
121 | const char *err; | |
122 | ||
123 | err = cgen_parse_keyword (cd, strp, keyword_table, field); | |
124 | if (err) | |
125 | return err; | |
126 | if (*field != 15) | |
127 | return _("Only $sp or $15 allowed for this opcode"); | |
128 | return NULL; | |
129 | } | |
130 | ||
131 | const char * | |
132 | parse_mep_align (CGEN_CPU_DESC cd, const char ** strp, | |
133 | enum cgen_operand_type type, long *field) | |
134 | { | |
135 | long lsbs = 0; | |
136 | const char *err; | |
137 | ||
138 | switch (type) | |
139 | { | |
140 | case MEP_OPERAND_PCREL8A2: | |
141 | case MEP_OPERAND_PCREL12A2: | |
142 | case MEP_OPERAND_PCREL17A2: | |
143 | case MEP_OPERAND_PCREL24A2: | |
144 | case MEP_OPERAND_CDISP8A2: | |
145 | case MEP_OPERAND_CDISP8A4: | |
146 | case MEP_OPERAND_CDISP8A8: | |
147 | err = cgen_parse_signed_integer (cd, strp, type, field); | |
148 | break; | |
149 | case MEP_OPERAND_PCABS24A2: | |
150 | case MEP_OPERAND_UDISP7: | |
151 | case MEP_OPERAND_UDISP7A2: | |
152 | case MEP_OPERAND_UDISP7A4: | |
153 | case MEP_OPERAND_UIMM7A4: | |
154 | case MEP_OPERAND_ADDR24A4: | |
155 | err = cgen_parse_unsigned_integer (cd, strp, type, (unsigned long *) field); | |
156 | break; | |
157 | default: | |
158 | abort(); | |
159 | } | |
160 | if (err) | |
161 | return err; | |
162 | switch (type) | |
163 | { | |
164 | case MEP_OPERAND_UDISP7: | |
165 | lsbs = 0; | |
166 | break; | |
167 | case MEP_OPERAND_PCREL8A2: | |
168 | case MEP_OPERAND_PCREL12A2: | |
169 | case MEP_OPERAND_PCREL17A2: | |
170 | case MEP_OPERAND_PCREL24A2: | |
171 | case MEP_OPERAND_PCABS24A2: | |
172 | case MEP_OPERAND_UDISP7A2: | |
173 | case MEP_OPERAND_CDISP8A2: | |
174 | lsbs = *field & 1; | |
175 | break; | |
176 | case MEP_OPERAND_UDISP7A4: | |
177 | case MEP_OPERAND_UIMM7A4: | |
178 | case MEP_OPERAND_ADDR24A4: | |
179 | case MEP_OPERAND_CDISP8A4: | |
180 | lsbs = *field & 3; | |
181 | break; | |
182 | case MEP_OPERAND_CDISP8A8: | |
183 | lsbs = *field & 7; | |
184 | break; | |
185 | default: | |
186 | /* Safe assumption? */ | |
187 | abort (); | |
188 | } | |
189 | if (lsbs) | |
190 | return "Value is not aligned enough"; | |
191 | return NULL; | |
192 | } | |
193 | ||
194 | const char * | |
195 | parse_mep_alignu (CGEN_CPU_DESC cd, const char ** strp, | |
196 | enum cgen_operand_type type, unsigned long *field) | |
197 | { | |
198 | return parse_mep_align (cd, strp, type, (long *) field); | |
199 | } | |
200 | ||
201 | ||
202 | /* Handle %lo(), %tpoff(), %sdaoff(), %hi(), and other signed | |
203 | constants in a signed context. */ | |
204 | ||
205 | static const char * | |
206 | parse_signed16 (CGEN_CPU_DESC cd, | |
207 | const char **strp, | |
208 | int opindex, | |
209 | long *valuep) | |
210 | { | |
211 | return parse_lo16 (cd, strp, opindex, valuep, 1); | |
212 | } | |
213 | ||
214 | static const char * | |
215 | parse_lo16 (CGEN_CPU_DESC cd, | |
216 | const char **strp, | |
217 | int opindex, | |
218 | long *valuep, | |
219 | long signedp) | |
220 | { | |
221 | const char *errmsg; | |
222 | enum cgen_parse_operand_result result_type; | |
223 | bfd_vma value; | |
224 | ||
225 | if (strncasecmp (*strp, "%lo(", 4) == 0) | |
226 | { | |
227 | *strp += 4; | |
228 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_LOW16, | |
229 | & result_type, & value); | |
230 | if (**strp != ')') | |
231 | return _("missing `)'"); | |
232 | ++*strp; | |
233 | if (errmsg == NULL | |
234 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
235 | value &= 0xffff; | |
236 | if (signedp) | |
237 | *valuep = (long)(short) value; | |
238 | else | |
239 | *valuep = value; | |
240 | return errmsg; | |
241 | } | |
242 | ||
243 | if (strncasecmp (*strp, "%hi(", 4) == 0) | |
244 | { | |
245 | *strp += 4; | |
246 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16S, | |
247 | & result_type, & value); | |
248 | if (**strp != ')') | |
249 | return _("missing `)'"); | |
250 | ++*strp; | |
251 | if (errmsg == NULL | |
252 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
253 | value = (value + 0x8000) >> 16; | |
254 | *valuep = value; | |
255 | return errmsg; | |
256 | } | |
257 | ||
258 | if (strncasecmp (*strp, "%uhi(", 5) == 0) | |
259 | { | |
260 | *strp += 5; | |
261 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16U, | |
262 | & result_type, & value); | |
263 | if (**strp != ')') | |
264 | return _("missing `)'"); | |
265 | ++*strp; | |
266 | if (errmsg == NULL | |
267 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
268 | value = value >> 16; | |
269 | *valuep = value; | |
270 | return errmsg; | |
271 | } | |
272 | ||
273 | if (strncasecmp (*strp, "%sdaoff(", 8) == 0) | |
274 | { | |
275 | *strp += 8; | |
276 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_GPREL, | |
277 | NULL, & value); | |
278 | if (**strp != ')') | |
279 | return _("missing `)'"); | |
280 | ++*strp; | |
281 | *valuep = value; | |
282 | return errmsg; | |
283 | } | |
284 | ||
285 | if (strncasecmp (*strp, "%tpoff(", 7) == 0) | |
286 | { | |
287 | *strp += 7; | |
288 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_TPREL, | |
289 | NULL, & value); | |
290 | if (**strp != ')') | |
291 | return _("missing `)'"); | |
292 | ++*strp; | |
293 | *valuep = value; | |
294 | return errmsg; | |
295 | } | |
296 | ||
297 | if (**strp == '%') | |
298 | return _("invalid %function() here"); | |
299 | ||
300 | return cgen_parse_signed_integer (cd, strp, opindex, valuep); | |
301 | } | |
302 | ||
303 | static const char * | |
304 | parse_unsigned16 (CGEN_CPU_DESC cd, | |
305 | const char **strp, | |
306 | int opindex, | |
307 | unsigned long *valuep) | |
308 | { | |
309 | return parse_lo16 (cd, strp, opindex, (long *) valuep, 0); | |
310 | } | |
311 | ||
312 | /* A special case of parse_signed16 which accepts only the value zero. */ | |
313 | ||
314 | static const char * | |
315 | parse_zero (CGEN_CPU_DESC cd, const char **strp, int opindex, long *valuep) | |
316 | { | |
317 | const char *errmsg; | |
318 | enum cgen_parse_operand_result result_type; | |
319 | bfd_vma value; | |
320 | ||
321 | /*fprintf(stderr, "dj: signed parse opindex `%s'\n", *strp);*/ | |
322 | ||
323 | /* Prevent ($ry) from being attempted as an expression on 'sw $rx,($ry)'. | |
324 | It will fail and cause ry to be listed as an undefined symbol in the | |
325 | listing. */ | |
326 | if (strncmp (*strp, "($", 2) == 0) | |
327 | return "not zero"; /* any string will do -- will never be seen. */ | |
328 | ||
329 | if (strncasecmp (*strp, "%lo(", 4) == 0) | |
330 | { | |
331 | *strp += 4; | |
332 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_LOW16, | |
333 | &result_type, &value); | |
334 | if (**strp != ')') | |
335 | return "missing `)'"; | |
336 | ++*strp; | |
337 | if (errmsg == NULL | |
338 | && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) | |
339 | return "not zero"; /* any string will do -- will never be seen. */ | |
340 | *valuep = value; | |
341 | return errmsg; | |
342 | } | |
343 | ||
344 | if (strncasecmp (*strp, "%hi(", 4) == 0) | |
345 | { | |
346 | *strp += 4; | |
347 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16S, | |
348 | &result_type, &value); | |
349 | if (**strp != ')') | |
350 | return "missing `)'"; | |
351 | ++*strp; | |
352 | if (errmsg == NULL | |
353 | && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) | |
354 | return "not zero"; /* any string will do -- will never be seen. */ | |
355 | *valuep = value; | |
356 | return errmsg; | |
357 | } | |
358 | ||
359 | if (strncasecmp (*strp, "%uhi(", 5) == 0) | |
360 | { | |
361 | *strp += 5; | |
362 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16U, | |
363 | &result_type, &value); | |
364 | if (**strp != ')') | |
365 | return "missing `)'"; | |
366 | ++*strp; | |
367 | if (errmsg == NULL | |
368 | && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) | |
369 | return "not zero"; /* any string will do -- will never be seen. */ | |
370 | *valuep = value; | |
371 | return errmsg; | |
372 | } | |
373 | ||
374 | if (strncasecmp (*strp, "%sdaoff(", 8) == 0) | |
375 | { | |
376 | *strp += 8; | |
377 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_GPREL, | |
378 | &result_type, &value); | |
379 | if (**strp != ')') | |
380 | return "missing `)'"; | |
381 | ++*strp; | |
382 | if (errmsg == NULL | |
383 | && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) | |
384 | return "not zero"; /* any string will do -- will never be seen. */ | |
385 | *valuep = value; | |
386 | return errmsg; | |
387 | } | |
388 | ||
389 | if (strncasecmp (*strp, "%tpoff(", 7) == 0) | |
390 | { | |
391 | *strp += 7; | |
392 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_TPREL, | |
393 | &result_type, &value); | |
394 | if (**strp != ')') | |
395 | return "missing `)'"; | |
396 | ++*strp; | |
397 | if (errmsg == NULL | |
398 | && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) | |
399 | return "not zero"; /* any string will do -- will never be seen. */ | |
400 | *valuep = value; | |
401 | return errmsg; | |
402 | } | |
403 | ||
404 | if (**strp == '%') | |
405 | return "invalid %function() here"; | |
406 | ||
407 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_NONE, | |
408 | &result_type, &value); | |
409 | if (errmsg == NULL | |
410 | && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) | |
411 | return "not zero"; /* any string will do -- will never be seen. */ | |
412 | ||
413 | return errmsg; | |
414 | } | |
415 | ||
416 | static const char * | |
417 | parse_unsigned7 (CGEN_CPU_DESC cd, const char **strp, | |
418 | enum cgen_operand_type opindex, unsigned long *valuep) | |
419 | { | |
420 | const char *errmsg; | |
421 | bfd_vma value; | |
422 | ||
423 | /* fprintf(stderr, "dj: unsigned7 parse `%s'\n", *strp); */ | |
424 | ||
425 | if (strncasecmp (*strp, "%tpoff(", 7) == 0) | |
426 | { | |
427 | int reloc; | |
428 | *strp += 7; | |
429 | switch (opindex) | |
430 | { | |
431 | case MEP_OPERAND_UDISP7: | |
432 | reloc = BFD_RELOC_MEP_TPREL7; | |
433 | break; | |
434 | case MEP_OPERAND_UDISP7A2: | |
435 | reloc = BFD_RELOC_MEP_TPREL7A2; | |
436 | break; | |
437 | case MEP_OPERAND_UDISP7A4: | |
438 | reloc = BFD_RELOC_MEP_TPREL7A4; | |
439 | break; | |
440 | default: | |
441 | /* Safe assumption? */ | |
442 | abort (); | |
443 | } | |
444 | errmsg = cgen_parse_address (cd, strp, opindex, reloc, | |
445 | NULL, &value); | |
446 | if (**strp != ')') | |
447 | return "missing `)'"; | |
448 | ++*strp; | |
449 | *valuep = value; | |
450 | return errmsg; | |
451 | } | |
452 | ||
453 | if (**strp == '%') | |
454 | return _("invalid %function() here"); | |
455 | ||
456 | return parse_mep_alignu (cd, strp, opindex, valuep); | |
457 | } | |
458 | ||
459 | /* BEGIN LIGHTWEIGHT MACRO PROCESSOR. */ | |
460 | ||
461 | #define MAXARGS 9 | |
462 | ||
463 | typedef struct | |
464 | { | |
465 | char *name; | |
466 | char *expansion; | |
467 | } macro; | |
468 | ||
469 | typedef struct | |
470 | { | |
471 | const char *start; | |
472 | int len; | |
473 | } arg; | |
474 | ||
475 | macro macros[] = | |
476 | { | |
477 | { "sizeof", "(`1.end + (- `1))"}, | |
478 | { "startof", "(`1 | 0)" }, | |
479 | { "align4", "(`1&(~3))"}, | |
480 | /*{ "hi", "(((`1+0x8000)>>16) & 0xffff)" }, */ | |
481 | /*{ "lo", "(`1 & 0xffff)" }, */ | |
482 | /*{ "sdaoff", "((`1-__sdabase) & 0x7f)"}, */ | |
483 | /*{ "tpoff", "((`1-__tpbase) & 0x7f)"}, */ | |
484 | { 0,0 } | |
485 | }; | |
486 | ||
487 | static char * expand_string (const char *, int); | |
488 | ||
489 | static const char * | |
490 | mep_cgen_expand_macros_and_parse_operand | |
491 | (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); | |
492 | ||
493 | static char * | |
494 | str_append (char *dest, const char *input, int len) | |
495 | { | |
496 | char *new_dest; | |
497 | int oldlen; | |
498 | ||
499 | if (len == 0) | |
500 | return dest; | |
501 | /* printf("str_append: <<%s>>, <<%s>>, %d\n", dest, input, len); */ | |
502 | oldlen = (dest ? strlen(dest) : 0); | |
503 | new_dest = realloc (dest, oldlen + len + 1); | |
504 | memset (new_dest + oldlen, 0, len + 1); | |
505 | return strncat (new_dest, input, len); | |
506 | } | |
507 | ||
508 | static macro * | |
509 | lookup_macro (const char *name) | |
510 | { | |
511 | macro *m; | |
512 | ||
513 | for (m = macros; m->name; ++m) | |
514 | if (strncmp (m->name, name, strlen(m->name)) == 0) | |
515 | return m; | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | static char * | |
521 | expand_macro (arg *args, int narg, macro *mac) | |
522 | { | |
523 | char *result = 0, *rescanned_result = 0; | |
524 | char *e = mac->expansion; | |
525 | char *mark = e; | |
526 | int arg = 0; | |
527 | ||
528 | /* printf("expanding macro %s with %d args\n", mac->name, narg + 1); */ | |
529 | while (*e) | |
530 | { | |
531 | if (*e == '`' && | |
532 | (*e+1) && | |
533 | ((*(e + 1) - '1') <= MAXARGS) && | |
534 | ((*(e + 1) - '1') <= narg)) | |
535 | { | |
536 | result = str_append (result, mark, e - mark); | |
537 | arg = (*(e + 1) - '1'); | |
538 | /* printf("replacing `%d with %s\n", arg+1, args[arg].start); */ | |
539 | result = str_append (result, args[arg].start, args[arg].len); | |
540 | ++e; | |
541 | mark = e+1; | |
542 | } | |
543 | ++e; | |
544 | } | |
545 | ||
546 | if (mark != e) | |
547 | result = str_append (result, mark, e - mark); | |
548 | ||
549 | if (result) | |
550 | { | |
551 | rescanned_result = expand_string (result, 0); | |
552 | free (result); | |
553 | return rescanned_result; | |
554 | } | |
555 | else | |
556 | return result; | |
557 | } | |
558 | ||
559 | #define IN_TEXT 0 | |
560 | #define IN_ARGS 1 | |
561 | ||
562 | static char * | |
563 | expand_string (const char *in, int first_only) | |
564 | { | |
565 | int num_expansions = 0; | |
566 | int depth = 0; | |
567 | int narg = -1; | |
568 | arg args[MAXARGS]; | |
569 | int state = IN_TEXT; | |
570 | const char *mark = in; | |
571 | macro *macro = 0; | |
572 | ||
573 | char *expansion = 0; | |
574 | char *result = 0; | |
575 | ||
576 | while (*in) | |
577 | { | |
578 | switch (state) | |
579 | { | |
580 | case IN_TEXT: | |
581 | if (*in == '%' && *(in + 1) && (!first_only || num_expansions == 0)) | |
582 | { | |
583 | macro = lookup_macro (in + 1); | |
584 | if (macro) | |
585 | { | |
586 | /* printf("entering state %d at '%s'...\n", state, in); */ | |
587 | result = str_append (result, mark, in - mark); | |
588 | mark = in; | |
589 | in += 1 + strlen (macro->name); | |
590 | while (*in == ' ') ++in; | |
591 | if (*in != '(') | |
592 | { | |
593 | state = IN_TEXT; | |
594 | macro = 0; | |
595 | } | |
596 | else | |
597 | { | |
598 | state = IN_ARGS; | |
599 | narg = 0; | |
600 | args[narg].start = in + 1; | |
601 | args[narg].len = 0; | |
602 | mark = in + 1; | |
603 | } | |
604 | } | |
605 | } | |
606 | break; | |
607 | case IN_ARGS: | |
608 | if (depth == 0) | |
609 | { | |
610 | switch (*in) | |
611 | { | |
612 | case ',': | |
613 | narg++; | |
614 | args[narg].start = (in + 1); | |
615 | args[narg].len = 0; | |
616 | break; | |
617 | case ')': | |
618 | state = IN_TEXT; | |
619 | /* printf("entering state %d at '%s'...\n", state, in); */ | |
620 | if (macro) | |
621 | { | |
622 | expansion = 0; | |
623 | expansion = expand_macro (args, narg, macro); | |
624 | num_expansions++; | |
625 | if (expansion) | |
626 | { | |
627 | result = str_append (result, expansion, strlen (expansion)); | |
628 | free (expansion); | |
629 | } | |
630 | } | |
631 | else | |
632 | { | |
633 | result = str_append (result, mark, in - mark); | |
634 | } | |
635 | macro = 0; | |
636 | mark = in + 1; | |
637 | break; | |
638 | case '(': | |
639 | depth++; | |
640 | default: | |
641 | args[narg].len++; | |
642 | break; | |
643 | } | |
644 | } | |
645 | else | |
646 | { | |
647 | if (*in == ')') | |
648 | depth--; | |
649 | if (narg > -1) | |
650 | args[narg].len++; | |
651 | } | |
652 | ||
653 | } | |
654 | ++in; | |
655 | } | |
656 | ||
657 | if (mark != in) | |
658 | result = str_append (result, mark, in - mark); | |
659 | ||
660 | return result; | |
661 | } | |
662 | ||
663 | #undef IN_ARGS | |
664 | #undef IN_TEXT | |
665 | #undef MAXARGS | |
666 | ||
667 | ||
668 | /* END LIGHTWEIGHT MACRO PROCESSOR. */ | |
669 | ||
670 | const char * mep_cgen_parse_operand | |
671 | (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); | |
672 | ||
673 | const char * | |
674 | mep_cgen_expand_macros_and_parse_operand (CGEN_CPU_DESC cd, int opindex, | |
675 | const char ** strp_in, CGEN_FIELDS * fields) | |
676 | { | |
677 | const char * errmsg = NULL; | |
678 | char *str = 0, *hold = 0; | |
679 | const char **strp = 0; | |
680 | ||
681 | /* Set up a new pointer to macro-expanded string. */ | |
682 | str = expand_string (*strp_in, 1); | |
683 | /* fprintf (stderr, " expanded <<%s>> to <<%s>>\n", *strp_in, str); */ | |
684 | ||
685 | hold = str; | |
686 | strp = (const char **)(&str); | |
687 | ||
688 | errmsg = mep_cgen_parse_operand (cd, opindex, strp, fields); | |
689 | ||
690 | /* Now work out the advance. */ | |
691 | if (strlen (str) == 0) | |
692 | *strp_in += strlen (*strp_in); | |
693 | ||
694 | else | |
695 | { | |
696 | if (strstr (*strp_in, str)) | |
697 | /* A macro-expansion was pulled off the front. */ | |
698 | *strp_in = strstr (*strp_in, str); | |
699 | else | |
700 | /* A non-macro-expansion was pulled off the front. */ | |
701 | *strp_in += (str - hold); | |
702 | } | |
703 | ||
704 | if (hold) | |
705 | free (hold); | |
706 | ||
707 | return errmsg; | |
708 | } | |
709 | ||
710 | #define CGEN_ASM_INIT_HOOK (cd->parse_operand = mep_cgen_expand_macros_and_parse_operand); | |
711 | ||
712 | /* -- dis.c */ | |
713 | ||
714 | const char * mep_cgen_parse_operand | |
715 | (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); | |
716 | ||
717 | /* Main entry point for operand parsing. | |
718 | ||
719 | This function is basically just a big switch statement. Earlier versions | |
720 | used tables to look up the function to use, but | |
721 | - if the table contains both assembler and disassembler functions then | |
722 | the disassembler contains much of the assembler and vice-versa, | |
723 | - there's a lot of inlining possibilities as things grow, | |
724 | - using a switch statement avoids the function call overhead. | |
725 | ||
726 | This function could be moved into `parse_insn_normal', but keeping it | |
727 | separate makes clear the interface between `parse_insn_normal' and each of | |
728 | the handlers. */ | |
729 | ||
730 | const char * | |
731 | mep_cgen_parse_operand (CGEN_CPU_DESC cd, | |
732 | int opindex, | |
733 | const char ** strp, | |
734 | CGEN_FIELDS * fields) | |
735 | { | |
736 | const char * errmsg = NULL; | |
737 | /* Used by scalar operands that still need to be parsed. */ | |
738 | long junk ATTRIBUTE_UNUSED; | |
739 | ||
740 | switch (opindex) | |
741 | { | |
742 | case MEP_OPERAND_ADDR24A4 : | |
743 | errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_ADDR24A4, (unsigned long *) (& fields->f_24u8a4n)); | |
744 | break; | |
745 | case MEP_OPERAND_CALLNUM : | |
746 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CALLNUM, (unsigned long *) (& fields->f_callnum)); | |
747 | break; | |
748 | case MEP_OPERAND_CCCC : | |
749 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CCCC, (unsigned long *) (& fields->f_rm)); | |
750 | break; | |
751 | case MEP_OPERAND_CCRN : | |
752 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr, & fields->f_ccrn); | |
753 | break; | |
754 | case MEP_OPERAND_CDISP8 : | |
755 | errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_CDISP8, (long *) (& fields->f_8s24)); | |
756 | break; | |
757 | case MEP_OPERAND_CDISP8A2 : | |
758 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_CDISP8A2, (long *) (& fields->f_8s24a2)); | |
759 | break; | |
760 | case MEP_OPERAND_CDISP8A4 : | |
761 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_CDISP8A4, (long *) (& fields->f_8s24a4)); | |
762 | break; | |
763 | case MEP_OPERAND_CDISP8A8 : | |
764 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_CDISP8A8, (long *) (& fields->f_8s24a8)); | |
765 | break; | |
766 | case MEP_OPERAND_CIMM4 : | |
767 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CIMM4, (unsigned long *) (& fields->f_rn)); | |
768 | break; | |
769 | case MEP_OPERAND_CIMM5 : | |
770 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CIMM5, (unsigned long *) (& fields->f_5u24)); | |
771 | break; | |
772 | case MEP_OPERAND_CODE16 : | |
773 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CODE16, (unsigned long *) (& fields->f_16u16)); | |
774 | break; | |
775 | case MEP_OPERAND_CODE24 : | |
776 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CODE24, (unsigned long *) (& fields->f_24u4n)); | |
777 | break; | |
778 | case MEP_OPERAND_CP_FLAG : | |
779 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr, & junk); | |
780 | break; | |
781 | case MEP_OPERAND_CRN : | |
782 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr, & fields->f_crn); | |
783 | break; | |
784 | case MEP_OPERAND_CRN64 : | |
785 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_crn); | |
786 | break; | |
787 | case MEP_OPERAND_CRNX : | |
788 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr, & fields->f_crnx); | |
789 | break; | |
790 | case MEP_OPERAND_CRNX64 : | |
791 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_crnx); | |
792 | break; | |
793 | case MEP_OPERAND_CSRN : | |
794 | errmsg = parse_csrn (cd, strp, & mep_cgen_opval_h_csr, & fields->f_csrn); | |
795 | break; | |
796 | case MEP_OPERAND_CSRN_IDX : | |
797 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CSRN_IDX, (unsigned long *) (& fields->f_csrn)); | |
798 | break; | |
799 | case MEP_OPERAND_DBG : | |
800 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
801 | break; | |
802 | case MEP_OPERAND_DEPC : | |
803 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
804 | break; | |
805 | case MEP_OPERAND_EPC : | |
806 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
807 | break; | |
808 | case MEP_OPERAND_EXC : | |
809 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
810 | break; | |
811 | case MEP_OPERAND_FMAX_CCRN : | |
812 | errmsg = parse_fmax_ccr (cd, strp, & mep_cgen_opval_h_ccr, & fields->f_fmax_4_4); | |
813 | break; | |
814 | case MEP_OPERAND_FMAX_FRD : | |
815 | errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frd); | |
816 | break; | |
817 | case MEP_OPERAND_FMAX_FRD_INT : | |
818 | errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frd); | |
819 | break; | |
820 | case MEP_OPERAND_FMAX_FRM : | |
821 | errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frm); | |
822 | break; | |
823 | case MEP_OPERAND_FMAX_FRN : | |
824 | errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frn); | |
825 | break; | |
826 | case MEP_OPERAND_FMAX_FRN_INT : | |
827 | errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frn); | |
828 | break; | |
829 | case MEP_OPERAND_FMAX_RM : | |
830 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_fmax_rm); | |
831 | break; | |
832 | case MEP_OPERAND_HI : | |
833 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
834 | break; | |
835 | case MEP_OPERAND_LO : | |
836 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
837 | break; | |
838 | case MEP_OPERAND_LP : | |
839 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
840 | break; | |
841 | case MEP_OPERAND_MB0 : | |
842 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
843 | break; | |
844 | case MEP_OPERAND_MB1 : | |
845 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
846 | break; | |
847 | case MEP_OPERAND_ME0 : | |
848 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
849 | break; | |
850 | case MEP_OPERAND_ME1 : | |
851 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
852 | break; | |
853 | case MEP_OPERAND_NPC : | |
854 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
855 | break; | |
856 | case MEP_OPERAND_OPT : | |
857 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
858 | break; | |
859 | case MEP_OPERAND_PCABS24A2 : | |
860 | errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_PCABS24A2, (unsigned long *) (& fields->f_24u5a2n)); | |
861 | break; | |
862 | case MEP_OPERAND_PCREL12A2 : | |
863 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL12A2, (long *) (& fields->f_12s4a2)); | |
864 | break; | |
865 | case MEP_OPERAND_PCREL17A2 : | |
866 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL17A2, (long *) (& fields->f_17s16a2)); | |
867 | break; | |
868 | case MEP_OPERAND_PCREL24A2 : | |
869 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL24A2, (long *) (& fields->f_24s5a2n)); | |
870 | break; | |
871 | case MEP_OPERAND_PCREL8A2 : | |
872 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL8A2, (long *) (& fields->f_8s8a2)); | |
873 | break; | |
874 | case MEP_OPERAND_PSW : | |
875 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
876 | break; | |
877 | case MEP_OPERAND_R0 : | |
878 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk); | |
879 | break; | |
880 | case MEP_OPERAND_R1 : | |
881 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk); | |
882 | break; | |
883 | case MEP_OPERAND_RL : | |
884 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rl); | |
885 | break; | |
886 | case MEP_OPERAND_RM : | |
887 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rm); | |
888 | break; | |
889 | case MEP_OPERAND_RMA : | |
890 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rm); | |
891 | break; | |
892 | case MEP_OPERAND_RN : | |
893 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
894 | break; | |
895 | case MEP_OPERAND_RN3 : | |
896 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
897 | break; | |
898 | case MEP_OPERAND_RN3C : | |
899 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
900 | break; | |
901 | case MEP_OPERAND_RN3L : | |
902 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
903 | break; | |
904 | case MEP_OPERAND_RN3S : | |
905 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
906 | break; | |
907 | case MEP_OPERAND_RN3UC : | |
908 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
909 | break; | |
910 | case MEP_OPERAND_RN3UL : | |
911 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
912 | break; | |
913 | case MEP_OPERAND_RN3US : | |
914 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
915 | break; | |
916 | case MEP_OPERAND_RNC : | |
917 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
918 | break; | |
919 | case MEP_OPERAND_RNL : | |
920 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
921 | break; | |
922 | case MEP_OPERAND_RNS : | |
923 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
924 | break; | |
925 | case MEP_OPERAND_RNUC : | |
926 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
927 | break; | |
928 | case MEP_OPERAND_RNUL : | |
929 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
930 | break; | |
931 | case MEP_OPERAND_RNUS : | |
932 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
933 | break; | |
934 | case MEP_OPERAND_SAR : | |
935 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
936 | break; | |
937 | case MEP_OPERAND_SDISP16 : | |
938 | errmsg = parse_signed16 (cd, strp, MEP_OPERAND_SDISP16, (long *) (& fields->f_16s16)); | |
939 | break; | |
940 | case MEP_OPERAND_SIMM16 : | |
941 | errmsg = parse_signed16 (cd, strp, MEP_OPERAND_SIMM16, (long *) (& fields->f_16s16)); | |
942 | break; | |
943 | case MEP_OPERAND_SIMM6 : | |
944 | errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM6, (long *) (& fields->f_6s8)); | |
945 | break; | |
946 | case MEP_OPERAND_SIMM8 : | |
947 | errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM8, (long *) (& fields->f_8s8)); | |
948 | break; | |
949 | case MEP_OPERAND_SP : | |
950 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk); | |
951 | break; | |
952 | case MEP_OPERAND_SPR : | |
953 | errmsg = parse_spreg (cd, strp, & mep_cgen_opval_h_gpr, & junk); | |
954 | break; | |
955 | case MEP_OPERAND_TP : | |
956 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk); | |
957 | break; | |
958 | case MEP_OPERAND_TPR : | |
959 | errmsg = parse_tpreg (cd, strp, & mep_cgen_opval_h_gpr, & junk); | |
960 | break; | |
961 | case MEP_OPERAND_UDISP2 : | |
962 | errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_UDISP2, (long *) (& fields->f_2u6)); | |
963 | break; | |
964 | case MEP_OPERAND_UDISP7 : | |
965 | errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7, (unsigned long *) (& fields->f_7u9)); | |
966 | break; | |
967 | case MEP_OPERAND_UDISP7A2 : | |
968 | errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7A2, (unsigned long *) (& fields->f_7u9a2)); | |
969 | break; | |
970 | case MEP_OPERAND_UDISP7A4 : | |
971 | errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7A4, (unsigned long *) (& fields->f_7u9a4)); | |
972 | break; | |
973 | case MEP_OPERAND_UIMM16 : | |
974 | errmsg = parse_unsigned16 (cd, strp, MEP_OPERAND_UIMM16, (unsigned long *) (& fields->f_16u16)); | |
975 | break; | |
976 | case MEP_OPERAND_UIMM2 : | |
977 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM2, (unsigned long *) (& fields->f_2u10)); | |
978 | break; | |
979 | case MEP_OPERAND_UIMM24 : | |
980 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM24, (unsigned long *) (& fields->f_24u8n)); | |
981 | break; | |
982 | case MEP_OPERAND_UIMM3 : | |
983 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM3, (unsigned long *) (& fields->f_3u5)); | |
984 | break; | |
985 | case MEP_OPERAND_UIMM4 : | |
986 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM4, (unsigned long *) (& fields->f_4u8)); | |
987 | break; | |
988 | case MEP_OPERAND_UIMM5 : | |
989 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM5, (unsigned long *) (& fields->f_5u8)); | |
990 | break; | |
991 | case MEP_OPERAND_UIMM7A4 : | |
992 | errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_UIMM7A4, (unsigned long *) (& fields->f_7u9a4)); | |
993 | break; | |
994 | case MEP_OPERAND_ZERO : | |
995 | errmsg = parse_zero (cd, strp, MEP_OPERAND_ZERO, (long *) (& junk)); | |
996 | break; | |
997 | ||
998 | default : | |
999 | /* xgettext:c-format */ | |
1000 | fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); | |
1001 | abort (); | |
1002 | } | |
1003 | ||
1004 | return errmsg; | |
1005 | } | |
1006 | ||
1007 | cgen_parse_fn * const mep_cgen_parse_handlers[] = | |
1008 | { | |
1009 | parse_insn_normal, | |
1010 | }; | |
1011 | ||
1012 | void | |
1013 | mep_cgen_init_asm (CGEN_CPU_DESC cd) | |
1014 | { | |
1015 | mep_cgen_init_opcode_table (cd); | |
1016 | mep_cgen_init_ibld_table (cd); | |
1017 | cd->parse_handlers = & mep_cgen_parse_handlers[0]; | |
1018 | cd->parse_operand = mep_cgen_parse_operand; | |
1019 | #ifdef CGEN_ASM_INIT_HOOK | |
1020 | CGEN_ASM_INIT_HOOK | |
1021 | #endif | |
1022 | } | |
1023 | ||
1024 | \f | |
1025 | ||
1026 | /* Regex construction routine. | |
1027 | ||
1028 | This translates an opcode syntax string into a regex string, | |
1029 | by replacing any non-character syntax element (such as an | |
1030 | opcode) with the pattern '.*' | |
1031 | ||
1032 | It then compiles the regex and stores it in the opcode, for | |
1033 | later use by mep_cgen_assemble_insn | |
1034 | ||
1035 | Returns NULL for success, an error message for failure. */ | |
1036 | ||
1037 | char * | |
1038 | mep_cgen_build_insn_regex (CGEN_INSN *insn) | |
1039 | { | |
1040 | CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); | |
1041 | const char *mnem = CGEN_INSN_MNEMONIC (insn); | |
1042 | char rxbuf[CGEN_MAX_RX_ELEMENTS]; | |
1043 | char *rx = rxbuf; | |
1044 | const CGEN_SYNTAX_CHAR_TYPE *syn; | |
1045 | int reg_err; | |
1046 | ||
1047 | syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); | |
1048 | ||
1049 | /* Mnemonics come first in the syntax string. */ | |
1050 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
1051 | return _("missing mnemonic in syntax string"); | |
1052 | ++syn; | |
1053 | ||
1054 | /* Generate a case sensitive regular expression that emulates case | |
1055 | insensitive matching in the "C" locale. We cannot generate a case | |
1056 | insensitive regular expression because in Turkish locales, 'i' and 'I' | |
1057 | are not equal modulo case conversion. */ | |
1058 | ||
1059 | /* Copy the literal mnemonic out of the insn. */ | |
1060 | for (; *mnem; mnem++) | |
1061 | { | |
1062 | char c = *mnem; | |
1063 | ||
1064 | if (ISALPHA (c)) | |
1065 | { | |
1066 | *rx++ = '['; | |
1067 | *rx++ = TOLOWER (c); | |
1068 | *rx++ = TOUPPER (c); | |
1069 | *rx++ = ']'; | |
1070 | } | |
1071 | else | |
1072 | *rx++ = c; | |
1073 | } | |
1074 | ||
1075 | /* Copy any remaining literals from the syntax string into the rx. */ | |
1076 | for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) | |
1077 | { | |
1078 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
1079 | { | |
1080 | char c = CGEN_SYNTAX_CHAR (* syn); | |
1081 | ||
1082 | switch (c) | |
1083 | { | |
1084 | /* Escape any regex metacharacters in the syntax. */ | |
1085 | case '.': case '[': case '\\': | |
1086 | case '*': case '^': case '$': | |
1087 | ||
1088 | #ifdef CGEN_ESCAPE_EXTENDED_REGEX | |
1089 | case '?': case '{': case '}': | |
1090 | case '(': case ')': case '*': | |
1091 | case '|': case '+': case ']': | |
1092 | #endif | |
1093 | *rx++ = '\\'; | |
1094 | *rx++ = c; | |
1095 | break; | |
1096 | ||
1097 | default: | |
1098 | if (ISALPHA (c)) | |
1099 | { | |
1100 | *rx++ = '['; | |
1101 | *rx++ = TOLOWER (c); | |
1102 | *rx++ = TOUPPER (c); | |
1103 | *rx++ = ']'; | |
1104 | } | |
1105 | else | |
1106 | *rx++ = c; | |
1107 | break; | |
1108 | } | |
1109 | } | |
1110 | else | |
1111 | { | |
1112 | /* Replace non-syntax fields with globs. */ | |
1113 | *rx++ = '.'; | |
1114 | *rx++ = '*'; | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /* Trailing whitespace ok. */ | |
1119 | * rx++ = '['; | |
1120 | * rx++ = ' '; | |
1121 | * rx++ = '\t'; | |
1122 | * rx++ = ']'; | |
1123 | * rx++ = '*'; | |
1124 | ||
1125 | /* But anchor it after that. */ | |
1126 | * rx++ = '$'; | |
1127 | * rx = '\0'; | |
1128 | ||
1129 | CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); | |
1130 | reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); | |
1131 | ||
1132 | if (reg_err == 0) | |
1133 | return NULL; | |
1134 | else | |
1135 | { | |
1136 | static char msg[80]; | |
1137 | ||
1138 | regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); | |
1139 | regfree ((regex_t *) CGEN_INSN_RX (insn)); | |
1140 | free (CGEN_INSN_RX (insn)); | |
1141 | (CGEN_INSN_RX (insn)) = NULL; | |
1142 | return msg; | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | \f | |
1147 | /* Default insn parser. | |
1148 | ||
1149 | The syntax string is scanned and operands are parsed and stored in FIELDS. | |
1150 | Relocs are queued as we go via other callbacks. | |
1151 | ||
1152 | ??? Note that this is currently an all-or-nothing parser. If we fail to | |
1153 | parse the instruction, we return 0 and the caller will start over from | |
1154 | the beginning. Backtracking will be necessary in parsing subexpressions, | |
1155 | but that can be handled there. Not handling backtracking here may get | |
1156 | expensive in the case of the m68k. Deal with later. | |
1157 | ||
1158 | Returns NULL for success, an error message for failure. */ | |
1159 | ||
1160 | static const char * | |
1161 | parse_insn_normal (CGEN_CPU_DESC cd, | |
1162 | const CGEN_INSN *insn, | |
1163 | const char **strp, | |
1164 | CGEN_FIELDS *fields) | |
1165 | { | |
1166 | /* ??? Runtime added insns not handled yet. */ | |
1167 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
1168 | const char *str = *strp; | |
1169 | const char *errmsg; | |
1170 | const char *p; | |
1171 | const CGEN_SYNTAX_CHAR_TYPE * syn; | |
1172 | #ifdef CGEN_MNEMONIC_OPERANDS | |
1173 | /* FIXME: wip */ | |
1174 | int past_opcode_p; | |
1175 | #endif | |
1176 | ||
1177 | /* For now we assume the mnemonic is first (there are no leading operands). | |
1178 | We can parse it without needing to set up operand parsing. | |
1179 | GAS's input scrubber will ensure mnemonics are lowercase, but we may | |
1180 | not be called from GAS. */ | |
1181 | p = CGEN_INSN_MNEMONIC (insn); | |
1182 | while (*p && TOLOWER (*p) == TOLOWER (*str)) | |
1183 | ++p, ++str; | |
1184 | ||
1185 | if (* p) | |
1186 | return _("unrecognized instruction"); | |
1187 | ||
1188 | #ifndef CGEN_MNEMONIC_OPERANDS | |
1189 | if (* str && ! ISSPACE (* str)) | |
1190 | return _("unrecognized instruction"); | |
1191 | #endif | |
1192 | ||
1193 | CGEN_INIT_PARSE (cd); | |
1194 | cgen_init_parse_operand (cd); | |
1195 | #ifdef CGEN_MNEMONIC_OPERANDS | |
1196 | past_opcode_p = 0; | |
1197 | #endif | |
1198 | ||
1199 | /* We don't check for (*str != '\0') here because we want to parse | |
1200 | any trailing fake arguments in the syntax string. */ | |
1201 | syn = CGEN_SYNTAX_STRING (syntax); | |
1202 | ||
1203 | /* Mnemonics come first for now, ensure valid string. */ | |
1204 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
1205 | abort (); | |
1206 | ||
1207 | ++syn; | |
1208 | ||
1209 | while (* syn != 0) | |
1210 | { | |
1211 | /* Non operand chars must match exactly. */ | |
1212 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
1213 | { | |
1214 | /* FIXME: While we allow for non-GAS callers above, we assume the | |
1215 | first char after the mnemonic part is a space. */ | |
1216 | /* FIXME: We also take inappropriate advantage of the fact that | |
1217 | GAS's input scrubber will remove extraneous blanks. */ | |
1218 | if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) | |
1219 | { | |
1220 | #ifdef CGEN_MNEMONIC_OPERANDS | |
1221 | if (CGEN_SYNTAX_CHAR(* syn) == ' ') | |
1222 | past_opcode_p = 1; | |
1223 | #endif | |
1224 | ++ syn; | |
1225 | ++ str; | |
1226 | } | |
1227 | else if (*str) | |
1228 | { | |
1229 | /* Syntax char didn't match. Can't be this insn. */ | |
1230 | static char msg [80]; | |
1231 | ||
1232 | /* xgettext:c-format */ | |
1233 | sprintf (msg, _("syntax error (expected char `%c', found `%c')"), | |
1234 | CGEN_SYNTAX_CHAR(*syn), *str); | |
1235 | return msg; | |
1236 | } | |
1237 | else | |
1238 | { | |
1239 | /* Ran out of input. */ | |
1240 | static char msg [80]; | |
1241 | ||
1242 | /* xgettext:c-format */ | |
1243 | sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), | |
1244 | CGEN_SYNTAX_CHAR(*syn)); | |
1245 | return msg; | |
1246 | } | |
1247 | continue; | |
1248 | } | |
1249 | ||
1250 | /* We have an operand of some sort. */ | |
1251 | errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), | |
1252 | &str, fields); | |
1253 | if (errmsg) | |
1254 | return errmsg; | |
1255 | ||
1256 | /* Done with this operand, continue with next one. */ | |
1257 | ++ syn; | |
1258 | } | |
1259 | ||
1260 | /* If we're at the end of the syntax string, we're done. */ | |
1261 | if (* syn == 0) | |
1262 | { | |
1263 | /* FIXME: For the moment we assume a valid `str' can only contain | |
1264 | blanks now. IE: We needn't try again with a longer version of | |
1265 | the insn and it is assumed that longer versions of insns appear | |
1266 | before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ | |
1267 | while (ISSPACE (* str)) | |
1268 | ++ str; | |
1269 | ||
1270 | if (* str != '\0') | |
1271 | return _("junk at end of line"); /* FIXME: would like to include `str' */ | |
1272 | ||
1273 | return NULL; | |
1274 | } | |
1275 | ||
1276 | /* We couldn't parse it. */ | |
1277 | return _("unrecognized instruction"); | |
1278 | } | |
1279 | \f | |
1280 | /* Main entry point. | |
1281 | This routine is called for each instruction to be assembled. | |
1282 | STR points to the insn to be assembled. | |
1283 | We assume all necessary tables have been initialized. | |
1284 | The assembled instruction, less any fixups, is stored in BUF. | |
1285 | Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value | |
1286 | still needs to be converted to target byte order, otherwise BUF is an array | |
1287 | of bytes in target byte order. | |
1288 | The result is a pointer to the insn's entry in the opcode table, | |
1289 | or NULL if an error occured (an error message will have already been | |
1290 | printed). | |
1291 | ||
1292 | Note that when processing (non-alias) macro-insns, | |
1293 | this function recurses. | |
1294 | ||
1295 | ??? It's possible to make this cpu-independent. | |
1296 | One would have to deal with a few minor things. | |
1297 | At this point in time doing so would be more of a curiosity than useful | |
1298 | [for example this file isn't _that_ big], but keeping the possibility in | |
1299 | mind helps keep the design clean. */ | |
1300 | ||
1301 | const CGEN_INSN * | |
1302 | mep_cgen_assemble_insn (CGEN_CPU_DESC cd, | |
1303 | const char *str, | |
1304 | CGEN_FIELDS *fields, | |
1305 | CGEN_INSN_BYTES_PTR buf, | |
1306 | char **errmsg) | |
1307 | { | |
1308 | const char *start; | |
1309 | CGEN_INSN_LIST *ilist; | |
1310 | const char *parse_errmsg = NULL; | |
1311 | const char *insert_errmsg = NULL; | |
1312 | int recognized_mnemonic = 0; | |
1313 | ||
1314 | /* Skip leading white space. */ | |
1315 | while (ISSPACE (* str)) | |
1316 | ++ str; | |
1317 | ||
1318 | /* The instructions are stored in hashed lists. | |
1319 | Get the first in the list. */ | |
1320 | ilist = CGEN_ASM_LOOKUP_INSN (cd, str); | |
1321 | ||
1322 | /* Keep looking until we find a match. */ | |
1323 | start = str; | |
1324 | for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) | |
1325 | { | |
1326 | const CGEN_INSN *insn = ilist->insn; | |
1327 | recognized_mnemonic = 1; | |
1328 | ||
1329 | #ifdef CGEN_VALIDATE_INSN_SUPPORTED | |
1330 | /* Not usually needed as unsupported opcodes | |
1331 | shouldn't be in the hash lists. */ | |
1332 | /* Is this insn supported by the selected cpu? */ | |
1333 | if (! mep_cgen_insn_supported (cd, insn)) | |
1334 | continue; | |
1335 | #endif | |
1336 | /* If the RELAXED attribute is set, this is an insn that shouldn't be | |
1337 | chosen immediately. Instead, it is used during assembler/linker | |
1338 | relaxation if possible. */ | |
1339 | if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0) | |
1340 | continue; | |
1341 | ||
1342 | str = start; | |
1343 | ||
1344 | /* Skip this insn if str doesn't look right lexically. */ | |
1345 | if (CGEN_INSN_RX (insn) != NULL && | |
1346 | regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) | |
1347 | continue; | |
1348 | ||
1349 | /* Allow parse/insert handlers to obtain length of insn. */ | |
1350 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); | |
1351 | ||
1352 | parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); | |
1353 | if (parse_errmsg != NULL) | |
1354 | continue; | |
1355 | ||
1356 | /* ??? 0 is passed for `pc'. */ | |
1357 | insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, | |
1358 | (bfd_vma) 0); | |
1359 | if (insert_errmsg != NULL) | |
1360 | continue; | |
1361 | ||
1362 | /* It is up to the caller to actually output the insn and any | |
1363 | queued relocs. */ | |
1364 | return insn; | |
1365 | } | |
1366 | ||
1367 | { | |
1368 | static char errbuf[150]; | |
1369 | #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS | |
1370 | const char *tmp_errmsg; | |
1371 | ||
1372 | /* If requesting verbose error messages, use insert_errmsg. | |
1373 | Failing that, use parse_errmsg. */ | |
1374 | tmp_errmsg = (insert_errmsg ? insert_errmsg : | |
1375 | parse_errmsg ? parse_errmsg : | |
1376 | recognized_mnemonic ? | |
1377 | _("unrecognized form of instruction") : | |
1378 | _("unrecognized instruction")); | |
1379 | ||
1380 | if (strlen (start) > 50) | |
1381 | /* xgettext:c-format */ | |
1382 | sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); | |
1383 | else | |
1384 | /* xgettext:c-format */ | |
1385 | sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); | |
1386 | #else | |
1387 | if (strlen (start) > 50) | |
1388 | /* xgettext:c-format */ | |
1389 | sprintf (errbuf, _("bad instruction `%.50s...'"), start); | |
1390 | else | |
1391 | /* xgettext:c-format */ | |
1392 | sprintf (errbuf, _("bad instruction `%.50s'"), start); | |
1393 | #endif | |
1394 | ||
1395 | *errmsg = errbuf; | |
1396 | return NULL; | |
1397 | } | |
1398 | } |