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bd2f2e55 DB |
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 | ||
9b201bb5 | 7 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2005, 2007 |
bd2f2e55 DB |
8 | Free Software Foundation, Inc. |
9 | ||
9b201bb5 | 10 | This file is part of libopcodes. |
bd2f2e55 | 11 | |
9b201bb5 | 12 | This library is free software; you can redistribute it and/or modify |
bd2f2e55 | 13 | it under the terms of the GNU General Public License as published by |
9b201bb5 | 14 | the Free Software Foundation; either version 3, or (at your option) |
bd2f2e55 DB |
15 | any later version. |
16 | ||
9b201bb5 NC |
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. | |
bd2f2e55 DB |
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 | ||
9b201bb5 | 26 | |
bd2f2e55 DB |
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 "mep-desc.h" | |
36 | #include "mep-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 | \f | |
50 | /* -- assembler routines inserted here. */ | |
51 | ||
52 | /* -- asm.c */ | |
53 | ||
54 | #define CGEN_VALIDATE_INSN_SUPPORTED | |
55 | ||
56 | const char * parse_csrn (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *); | |
57 | const char * parse_tpreg (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *); | |
58 | const char * parse_spreg (CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *); | |
59 | const char * parse_mep_align (CGEN_CPU_DESC, const char **, enum cgen_operand_type, long *); | |
60 | const char * parse_mep_alignu (CGEN_CPU_DESC, const char **, enum cgen_operand_type, unsigned long *); | |
61 | static const char * parse_signed16 (CGEN_CPU_DESC, const char **, int, long *); | |
62 | static const char * parse_unsigned16 (CGEN_CPU_DESC, const char **, int, unsigned long *); | |
63 | static const char * parse_lo16 (CGEN_CPU_DESC, const char **, int, long *, long); | |
64 | static const char * parse_unsigned7 (CGEN_CPU_DESC, const char **, enum cgen_operand_type, unsigned long *); | |
65 | static const char * parse_zero (CGEN_CPU_DESC, const char **, int, long *); | |
66 | ||
67 | const char * | |
68 | parse_csrn (CGEN_CPU_DESC cd, const char **strp, | |
69 | CGEN_KEYWORD *keyword_table, long *field) | |
70 | { | |
71 | const char *err; | |
72 | unsigned long value; | |
73 | ||
74 | err = cgen_parse_keyword (cd, strp, keyword_table, field); | |
75 | if (!err) | |
76 | return NULL; | |
77 | ||
78 | err = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CSRN_IDX, & value); | |
79 | if (err) | |
80 | return err; | |
81 | *field = value; | |
82 | return NULL; | |
83 | } | |
84 | ||
85 | /* begin-cop-ip-parse-handlers */ | |
86 | static const char * | |
87 | parse_fmax_cr (CGEN_CPU_DESC cd, | |
88 | const char **strp, | |
89 | CGEN_KEYWORD *keyword_table ATTRIBUTE_UNUSED, | |
90 | long *field) | |
91 | { | |
92 | return cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr_fmax, field); | |
93 | } | |
94 | static const char * | |
95 | parse_fmax_ccr (CGEN_CPU_DESC cd, | |
96 | const char **strp, | |
97 | CGEN_KEYWORD *keyword_table ATTRIBUTE_UNUSED, | |
98 | long *field) | |
99 | { | |
100 | return cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr_fmax, field); | |
101 | } | |
102 | /* end-cop-ip-parse-handlers */ | |
103 | ||
104 | const char * | |
105 | parse_tpreg (CGEN_CPU_DESC cd, const char ** strp, | |
106 | CGEN_KEYWORD *keyword_table, long *field) | |
107 | { | |
108 | const char *err; | |
109 | ||
110 | err = cgen_parse_keyword (cd, strp, keyword_table, field); | |
111 | if (err) | |
112 | return err; | |
113 | if (*field != 13) | |
114 | return _("Only $tp or $13 allowed for this opcode"); | |
115 | return NULL; | |
116 | } | |
117 | ||
118 | const char * | |
119 | parse_spreg (CGEN_CPU_DESC cd, const char ** strp, | |
120 | CGEN_KEYWORD *keyword_table, long *field) | |
121 | { | |
122 | const char *err; | |
123 | ||
124 | err = cgen_parse_keyword (cd, strp, keyword_table, field); | |
125 | if (err) | |
126 | return err; | |
127 | if (*field != 15) | |
128 | return _("Only $sp or $15 allowed for this opcode"); | |
129 | return NULL; | |
130 | } | |
131 | ||
132 | const char * | |
133 | parse_mep_align (CGEN_CPU_DESC cd, const char ** strp, | |
134 | enum cgen_operand_type type, long *field) | |
135 | { | |
136 | long lsbs = 0; | |
137 | const char *err; | |
138 | ||
139 | switch (type) | |
140 | { | |
141 | case MEP_OPERAND_PCREL8A2: | |
142 | case MEP_OPERAND_PCREL12A2: | |
143 | case MEP_OPERAND_PCREL17A2: | |
144 | case MEP_OPERAND_PCREL24A2: | |
145 | case MEP_OPERAND_CDISP8A2: | |
146 | case MEP_OPERAND_CDISP8A4: | |
147 | case MEP_OPERAND_CDISP8A8: | |
148 | err = cgen_parse_signed_integer (cd, strp, type, field); | |
149 | break; | |
150 | case MEP_OPERAND_PCABS24A2: | |
151 | case MEP_OPERAND_UDISP7: | |
152 | case MEP_OPERAND_UDISP7A2: | |
153 | case MEP_OPERAND_UDISP7A4: | |
154 | case MEP_OPERAND_UIMM7A4: | |
155 | case MEP_OPERAND_ADDR24A4: | |
156 | err = cgen_parse_unsigned_integer (cd, strp, type, (unsigned long *) field); | |
157 | break; | |
158 | default: | |
159 | abort(); | |
160 | } | |
161 | if (err) | |
162 | return err; | |
163 | switch (type) | |
164 | { | |
165 | case MEP_OPERAND_UDISP7: | |
166 | lsbs = 0; | |
167 | break; | |
168 | case MEP_OPERAND_PCREL8A2: | |
169 | case MEP_OPERAND_PCREL12A2: | |
170 | case MEP_OPERAND_PCREL17A2: | |
171 | case MEP_OPERAND_PCREL24A2: | |
172 | case MEP_OPERAND_PCABS24A2: | |
173 | case MEP_OPERAND_UDISP7A2: | |
174 | case MEP_OPERAND_CDISP8A2: | |
175 | lsbs = *field & 1; | |
176 | break; | |
177 | case MEP_OPERAND_UDISP7A4: | |
178 | case MEP_OPERAND_UIMM7A4: | |
179 | case MEP_OPERAND_ADDR24A4: | |
180 | case MEP_OPERAND_CDISP8A4: | |
181 | lsbs = *field & 3; | |
182 | break; | |
183 | case MEP_OPERAND_CDISP8A8: | |
184 | lsbs = *field & 7; | |
185 | break; | |
186 | default: | |
187 | /* Safe assumption? */ | |
188 | abort (); | |
189 | } | |
190 | if (lsbs) | |
191 | return "Value is not aligned enough"; | |
192 | return NULL; | |
193 | } | |
194 | ||
195 | const char * | |
196 | parse_mep_alignu (CGEN_CPU_DESC cd, const char ** strp, | |
197 | enum cgen_operand_type type, unsigned long *field) | |
198 | { | |
199 | return parse_mep_align (cd, strp, type, (long *) field); | |
200 | } | |
201 | ||
202 | ||
203 | /* Handle %lo(), %tpoff(), %sdaoff(), %hi(), and other signed | |
204 | constants in a signed context. */ | |
205 | ||
206 | static const char * | |
207 | parse_signed16 (CGEN_CPU_DESC cd, | |
208 | const char **strp, | |
209 | int opindex, | |
210 | long *valuep) | |
211 | { | |
212 | return parse_lo16 (cd, strp, opindex, valuep, 1); | |
213 | } | |
214 | ||
215 | static const char * | |
216 | parse_lo16 (CGEN_CPU_DESC cd, | |
217 | const char **strp, | |
218 | int opindex, | |
219 | long *valuep, | |
220 | long signedp) | |
221 | { | |
222 | const char *errmsg; | |
223 | enum cgen_parse_operand_result result_type; | |
224 | bfd_vma value; | |
225 | ||
226 | if (strncasecmp (*strp, "%lo(", 4) == 0) | |
227 | { | |
228 | *strp += 4; | |
229 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_LOW16, | |
230 | & result_type, & value); | |
231 | if (**strp != ')') | |
232 | return _("missing `)'"); | |
233 | ++*strp; | |
234 | if (errmsg == NULL | |
235 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
236 | value &= 0xffff; | |
237 | if (signedp) | |
238 | *valuep = (long)(short) value; | |
239 | else | |
240 | *valuep = value; | |
241 | return errmsg; | |
242 | } | |
243 | ||
244 | if (strncasecmp (*strp, "%hi(", 4) == 0) | |
245 | { | |
246 | *strp += 4; | |
247 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16S, | |
248 | & result_type, & value); | |
249 | if (**strp != ')') | |
250 | return _("missing `)'"); | |
251 | ++*strp; | |
252 | if (errmsg == NULL | |
253 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
254 | value = (value + 0x8000) >> 16; | |
255 | *valuep = value; | |
256 | return errmsg; | |
257 | } | |
258 | ||
259 | if (strncasecmp (*strp, "%uhi(", 5) == 0) | |
260 | { | |
261 | *strp += 5; | |
262 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16U, | |
263 | & result_type, & value); | |
264 | if (**strp != ')') | |
265 | return _("missing `)'"); | |
266 | ++*strp; | |
267 | if (errmsg == NULL | |
268 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
269 | value = value >> 16; | |
270 | *valuep = value; | |
271 | return errmsg; | |
272 | } | |
273 | ||
274 | if (strncasecmp (*strp, "%sdaoff(", 8) == 0) | |
275 | { | |
276 | *strp += 8; | |
277 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_GPREL, | |
278 | NULL, & value); | |
279 | if (**strp != ')') | |
280 | return _("missing `)'"); | |
281 | ++*strp; | |
282 | *valuep = value; | |
283 | return errmsg; | |
284 | } | |
285 | ||
286 | if (strncasecmp (*strp, "%tpoff(", 7) == 0) | |
287 | { | |
288 | *strp += 7; | |
289 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_TPREL, | |
290 | NULL, & value); | |
291 | if (**strp != ')') | |
292 | return _("missing `)'"); | |
293 | ++*strp; | |
294 | *valuep = value; | |
295 | return errmsg; | |
296 | } | |
297 | ||
298 | if (**strp == '%') | |
299 | return _("invalid %function() here"); | |
300 | ||
301 | return cgen_parse_signed_integer (cd, strp, opindex, valuep); | |
302 | } | |
303 | ||
304 | static const char * | |
305 | parse_unsigned16 (CGEN_CPU_DESC cd, | |
306 | const char **strp, | |
307 | int opindex, | |
308 | unsigned long *valuep) | |
309 | { | |
310 | return parse_lo16 (cd, strp, opindex, (long *) valuep, 0); | |
311 | } | |
312 | ||
313 | /* A special case of parse_signed16 which accepts only the value zero. */ | |
314 | ||
315 | static const char * | |
316 | parse_zero (CGEN_CPU_DESC cd, const char **strp, int opindex, long *valuep) | |
317 | { | |
318 | const char *errmsg; | |
319 | enum cgen_parse_operand_result result_type; | |
320 | bfd_vma value; | |
321 | ||
322 | /*fprintf(stderr, "dj: signed parse opindex `%s'\n", *strp);*/ | |
323 | ||
324 | /* Prevent ($ry) from being attempted as an expression on 'sw $rx,($ry)'. | |
325 | It will fail and cause ry to be listed as an undefined symbol in the | |
326 | listing. */ | |
327 | if (strncmp (*strp, "($", 2) == 0) | |
328 | return "not zero"; /* any string will do -- will never be seen. */ | |
329 | ||
330 | if (strncasecmp (*strp, "%lo(", 4) == 0) | |
331 | { | |
332 | *strp += 4; | |
333 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_LOW16, | |
334 | &result_type, &value); | |
335 | if (**strp != ')') | |
336 | return "missing `)'"; | |
337 | ++*strp; | |
338 | if (errmsg == NULL | |
339 | && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) | |
340 | return "not zero"; /* any string will do -- will never be seen. */ | |
341 | *valuep = value; | |
342 | return errmsg; | |
343 | } | |
344 | ||
345 | if (strncasecmp (*strp, "%hi(", 4) == 0) | |
346 | { | |
347 | *strp += 4; | |
348 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16S, | |
349 | &result_type, &value); | |
350 | if (**strp != ')') | |
351 | return "missing `)'"; | |
352 | ++*strp; | |
353 | if (errmsg == NULL | |
354 | && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) | |
355 | return "not zero"; /* any string will do -- will never be seen. */ | |
356 | *valuep = value; | |
357 | return errmsg; | |
358 | } | |
359 | ||
360 | if (strncasecmp (*strp, "%uhi(", 5) == 0) | |
361 | { | |
362 | *strp += 5; | |
363 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_HI16U, | |
364 | &result_type, &value); | |
365 | if (**strp != ')') | |
366 | return "missing `)'"; | |
367 | ++*strp; | |
368 | if (errmsg == NULL | |
369 | && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) | |
370 | return "not zero"; /* any string will do -- will never be seen. */ | |
371 | *valuep = value; | |
372 | return errmsg; | |
373 | } | |
374 | ||
375 | if (strncasecmp (*strp, "%sdaoff(", 8) == 0) | |
376 | { | |
377 | *strp += 8; | |
378 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_GPREL, | |
379 | &result_type, &value); | |
380 | if (**strp != ')') | |
381 | return "missing `)'"; | |
382 | ++*strp; | |
383 | if (errmsg == NULL | |
384 | && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) | |
385 | return "not zero"; /* any string will do -- will never be seen. */ | |
386 | *valuep = value; | |
387 | return errmsg; | |
388 | } | |
389 | ||
390 | if (strncasecmp (*strp, "%tpoff(", 7) == 0) | |
391 | { | |
392 | *strp += 7; | |
393 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_MEP_TPREL, | |
394 | &result_type, &value); | |
395 | if (**strp != ')') | |
396 | return "missing `)'"; | |
397 | ++*strp; | |
398 | if (errmsg == NULL | |
399 | && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) | |
400 | return "not zero"; /* any string will do -- will never be seen. */ | |
401 | *valuep = value; | |
402 | return errmsg; | |
403 | } | |
404 | ||
405 | if (**strp == '%') | |
406 | return "invalid %function() here"; | |
407 | ||
408 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_NONE, | |
409 | &result_type, &value); | |
410 | if (errmsg == NULL | |
411 | && (result_type != CGEN_PARSE_OPERAND_RESULT_NUMBER || value != 0)) | |
412 | return "not zero"; /* any string will do -- will never be seen. */ | |
413 | ||
414 | return errmsg; | |
415 | } | |
416 | ||
417 | static const char * | |
418 | parse_unsigned7 (CGEN_CPU_DESC cd, const char **strp, | |
419 | enum cgen_operand_type opindex, unsigned long *valuep) | |
420 | { | |
421 | const char *errmsg; | |
422 | bfd_vma value; | |
423 | ||
424 | /* fprintf(stderr, "dj: unsigned7 parse `%s'\n", *strp); */ | |
425 | ||
426 | if (strncasecmp (*strp, "%tpoff(", 7) == 0) | |
427 | { | |
428 | int reloc; | |
429 | *strp += 7; | |
430 | switch (opindex) | |
431 | { | |
432 | case MEP_OPERAND_UDISP7: | |
433 | reloc = BFD_RELOC_MEP_TPREL7; | |
434 | break; | |
435 | case MEP_OPERAND_UDISP7A2: | |
436 | reloc = BFD_RELOC_MEP_TPREL7A2; | |
437 | break; | |
438 | case MEP_OPERAND_UDISP7A4: | |
439 | reloc = BFD_RELOC_MEP_TPREL7A4; | |
440 | break; | |
441 | default: | |
442 | /* Safe assumption? */ | |
443 | abort (); | |
444 | } | |
445 | errmsg = cgen_parse_address (cd, strp, opindex, reloc, | |
446 | NULL, &value); | |
447 | if (**strp != ')') | |
448 | return "missing `)'"; | |
449 | ++*strp; | |
450 | *valuep = value; | |
451 | return errmsg; | |
452 | } | |
453 | ||
454 | if (**strp == '%') | |
455 | return _("invalid %function() here"); | |
456 | ||
457 | return parse_mep_alignu (cd, strp, opindex, valuep); | |
458 | } | |
459 | ||
460 | /* BEGIN LIGHTWEIGHT MACRO PROCESSOR. */ | |
461 | ||
462 | #define MAXARGS 9 | |
463 | ||
464 | typedef struct | |
465 | { | |
466 | char *name; | |
467 | char *expansion; | |
468 | } macro; | |
469 | ||
470 | typedef struct | |
471 | { | |
472 | const char *start; | |
473 | int len; | |
474 | } arg; | |
475 | ||
476 | macro macros[] = | |
477 | { | |
478 | { "sizeof", "(`1.end + (- `1))"}, | |
479 | { "startof", "(`1 | 0)" }, | |
480 | { "align4", "(`1&(~3))"}, | |
481 | /*{ "hi", "(((`1+0x8000)>>16) & 0xffff)" }, */ | |
482 | /*{ "lo", "(`1 & 0xffff)" }, */ | |
483 | /*{ "sdaoff", "((`1-__sdabase) & 0x7f)"}, */ | |
484 | /*{ "tpoff", "((`1-__tpbase) & 0x7f)"}, */ | |
485 | { 0,0 } | |
486 | }; | |
487 | ||
488 | static char * expand_string (const char *, int); | |
489 | ||
490 | static const char * | |
491 | mep_cgen_expand_macros_and_parse_operand | |
492 | (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); | |
493 | ||
494 | static char * | |
495 | str_append (char *dest, const char *input, int len) | |
496 | { | |
497 | char *new_dest; | |
498 | int oldlen; | |
499 | ||
500 | if (len == 0) | |
501 | return dest; | |
502 | /* printf("str_append: <<%s>>, <<%s>>, %d\n", dest, input, len); */ | |
503 | oldlen = (dest ? strlen(dest) : 0); | |
504 | new_dest = realloc (dest, oldlen + len + 1); | |
505 | memset (new_dest + oldlen, 0, len + 1); | |
506 | return strncat (new_dest, input, len); | |
507 | } | |
508 | ||
509 | static macro * | |
510 | lookup_macro (const char *name) | |
511 | { | |
512 | macro *m; | |
513 | ||
514 | for (m = macros; m->name; ++m) | |
515 | if (strncmp (m->name, name, strlen(m->name)) == 0) | |
516 | return m; | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | static char * | |
522 | expand_macro (arg *args, int narg, macro *mac) | |
523 | { | |
524 | char *result = 0, *rescanned_result = 0; | |
525 | char *e = mac->expansion; | |
526 | char *mark = e; | |
527 | int arg = 0; | |
528 | ||
529 | /* printf("expanding macro %s with %d args\n", mac->name, narg + 1); */ | |
530 | while (*e) | |
531 | { | |
532 | if (*e == '`' && | |
533 | (*e+1) && | |
534 | ((*(e + 1) - '1') <= MAXARGS) && | |
535 | ((*(e + 1) - '1') <= narg)) | |
536 | { | |
537 | result = str_append (result, mark, e - mark); | |
538 | arg = (*(e + 1) - '1'); | |
539 | /* printf("replacing `%d with %s\n", arg+1, args[arg].start); */ | |
540 | result = str_append (result, args[arg].start, args[arg].len); | |
541 | ++e; | |
542 | mark = e+1; | |
543 | } | |
544 | ++e; | |
545 | } | |
546 | ||
547 | if (mark != e) | |
548 | result = str_append (result, mark, e - mark); | |
549 | ||
550 | if (result) | |
551 | { | |
552 | rescanned_result = expand_string (result, 0); | |
553 | free (result); | |
554 | return rescanned_result; | |
555 | } | |
556 | else | |
557 | return result; | |
558 | } | |
559 | ||
560 | #define IN_TEXT 0 | |
561 | #define IN_ARGS 1 | |
562 | ||
563 | static char * | |
564 | expand_string (const char *in, int first_only) | |
565 | { | |
566 | int num_expansions = 0; | |
567 | int depth = 0; | |
568 | int narg = -1; | |
569 | arg args[MAXARGS]; | |
570 | int state = IN_TEXT; | |
571 | const char *mark = in; | |
572 | macro *macro = 0; | |
573 | ||
574 | char *expansion = 0; | |
575 | char *result = 0; | |
576 | ||
577 | while (*in) | |
578 | { | |
579 | switch (state) | |
580 | { | |
581 | case IN_TEXT: | |
582 | if (*in == '%' && *(in + 1) && (!first_only || num_expansions == 0)) | |
583 | { | |
584 | macro = lookup_macro (in + 1); | |
585 | if (macro) | |
586 | { | |
587 | /* printf("entering state %d at '%s'...\n", state, in); */ | |
588 | result = str_append (result, mark, in - mark); | |
589 | mark = in; | |
590 | in += 1 + strlen (macro->name); | |
591 | while (*in == ' ') ++in; | |
592 | if (*in != '(') | |
593 | { | |
594 | state = IN_TEXT; | |
595 | macro = 0; | |
596 | } | |
597 | else | |
598 | { | |
599 | state = IN_ARGS; | |
600 | narg = 0; | |
601 | args[narg].start = in + 1; | |
602 | args[narg].len = 0; | |
603 | mark = in + 1; | |
604 | } | |
605 | } | |
606 | } | |
607 | break; | |
608 | case IN_ARGS: | |
609 | if (depth == 0) | |
610 | { | |
611 | switch (*in) | |
612 | { | |
613 | case ',': | |
614 | narg++; | |
615 | args[narg].start = (in + 1); | |
616 | args[narg].len = 0; | |
617 | break; | |
618 | case ')': | |
619 | state = IN_TEXT; | |
620 | /* printf("entering state %d at '%s'...\n", state, in); */ | |
621 | if (macro) | |
622 | { | |
623 | expansion = 0; | |
624 | expansion = expand_macro (args, narg, macro); | |
625 | num_expansions++; | |
626 | if (expansion) | |
627 | { | |
628 | result = str_append (result, expansion, strlen (expansion)); | |
629 | free (expansion); | |
630 | } | |
631 | } | |
632 | else | |
633 | { | |
634 | result = str_append (result, mark, in - mark); | |
635 | } | |
636 | macro = 0; | |
637 | mark = in + 1; | |
638 | break; | |
639 | case '(': | |
640 | depth++; | |
641 | default: | |
642 | args[narg].len++; | |
643 | break; | |
644 | } | |
645 | } | |
646 | else | |
647 | { | |
648 | if (*in == ')') | |
649 | depth--; | |
650 | if (narg > -1) | |
651 | args[narg].len++; | |
652 | } | |
653 | ||
654 | } | |
655 | ++in; | |
656 | } | |
657 | ||
658 | if (mark != in) | |
659 | result = str_append (result, mark, in - mark); | |
660 | ||
661 | return result; | |
662 | } | |
663 | ||
664 | #undef IN_ARGS | |
665 | #undef IN_TEXT | |
666 | #undef MAXARGS | |
667 | ||
668 | ||
669 | /* END LIGHTWEIGHT MACRO PROCESSOR. */ | |
670 | ||
671 | const char * mep_cgen_parse_operand | |
672 | (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); | |
673 | ||
674 | const char * | |
675 | mep_cgen_expand_macros_and_parse_operand (CGEN_CPU_DESC cd, int opindex, | |
676 | const char ** strp_in, CGEN_FIELDS * fields) | |
677 | { | |
678 | const char * errmsg = NULL; | |
679 | char *str = 0, *hold = 0; | |
680 | const char **strp = 0; | |
681 | ||
682 | /* Set up a new pointer to macro-expanded string. */ | |
683 | str = expand_string (*strp_in, 1); | |
684 | /* fprintf (stderr, " expanded <<%s>> to <<%s>>\n", *strp_in, str); */ | |
685 | ||
686 | hold = str; | |
687 | strp = (const char **)(&str); | |
688 | ||
689 | errmsg = mep_cgen_parse_operand (cd, opindex, strp, fields); | |
690 | ||
691 | /* Now work out the advance. */ | |
692 | if (strlen (str) == 0) | |
693 | *strp_in += strlen (*strp_in); | |
694 | ||
695 | else | |
696 | { | |
697 | if (strstr (*strp_in, str)) | |
698 | /* A macro-expansion was pulled off the front. */ | |
699 | *strp_in = strstr (*strp_in, str); | |
700 | else | |
701 | /* A non-macro-expansion was pulled off the front. */ | |
702 | *strp_in += (str - hold); | |
703 | } | |
704 | ||
705 | if (hold) | |
706 | free (hold); | |
707 | ||
708 | return errmsg; | |
709 | } | |
710 | ||
711 | #define CGEN_ASM_INIT_HOOK (cd->parse_operand = mep_cgen_expand_macros_and_parse_operand); | |
712 | ||
713 | /* -- dis.c */ | |
714 | ||
715 | const char * mep_cgen_parse_operand | |
716 | (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); | |
717 | ||
718 | /* Main entry point for operand parsing. | |
719 | ||
720 | This function is basically just a big switch statement. Earlier versions | |
721 | used tables to look up the function to use, but | |
722 | - if the table contains both assembler and disassembler functions then | |
723 | the disassembler contains much of the assembler and vice-versa, | |
724 | - there's a lot of inlining possibilities as things grow, | |
725 | - using a switch statement avoids the function call overhead. | |
726 | ||
727 | This function could be moved into `parse_insn_normal', but keeping it | |
728 | separate makes clear the interface between `parse_insn_normal' and each of | |
729 | the handlers. */ | |
730 | ||
731 | const char * | |
732 | mep_cgen_parse_operand (CGEN_CPU_DESC cd, | |
733 | int opindex, | |
734 | const char ** strp, | |
735 | CGEN_FIELDS * fields) | |
736 | { | |
737 | const char * errmsg = NULL; | |
738 | /* Used by scalar operands that still need to be parsed. */ | |
739 | long junk ATTRIBUTE_UNUSED; | |
740 | ||
741 | switch (opindex) | |
742 | { | |
743 | case MEP_OPERAND_ADDR24A4 : | |
744 | errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_ADDR24A4, (unsigned long *) (& fields->f_24u8a4n)); | |
745 | break; | |
746 | case MEP_OPERAND_CALLNUM : | |
747 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CALLNUM, (unsigned long *) (& fields->f_callnum)); | |
748 | break; | |
749 | case MEP_OPERAND_CCCC : | |
750 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CCCC, (unsigned long *) (& fields->f_rm)); | |
751 | break; | |
752 | case MEP_OPERAND_CCRN : | |
753 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr, & fields->f_ccrn); | |
754 | break; | |
755 | case MEP_OPERAND_CDISP8 : | |
756 | errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_CDISP8, (long *) (& fields->f_8s24)); | |
757 | break; | |
758 | case MEP_OPERAND_CDISP8A2 : | |
759 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_CDISP8A2, (long *) (& fields->f_8s24a2)); | |
760 | break; | |
761 | case MEP_OPERAND_CDISP8A4 : | |
762 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_CDISP8A4, (long *) (& fields->f_8s24a4)); | |
763 | break; | |
764 | case MEP_OPERAND_CDISP8A8 : | |
765 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_CDISP8A8, (long *) (& fields->f_8s24a8)); | |
766 | break; | |
767 | case MEP_OPERAND_CIMM4 : | |
768 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CIMM4, (unsigned long *) (& fields->f_rn)); | |
769 | break; | |
770 | case MEP_OPERAND_CIMM5 : | |
771 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CIMM5, (unsigned long *) (& fields->f_5u24)); | |
772 | break; | |
773 | case MEP_OPERAND_CODE16 : | |
774 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CODE16, (unsigned long *) (& fields->f_16u16)); | |
775 | break; | |
776 | case MEP_OPERAND_CODE24 : | |
777 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CODE24, (unsigned long *) (& fields->f_24u4n)); | |
778 | break; | |
779 | case MEP_OPERAND_CP_FLAG : | |
780 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_ccr, & junk); | |
781 | break; | |
782 | case MEP_OPERAND_CRN : | |
783 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr, & fields->f_crn); | |
784 | break; | |
785 | case MEP_OPERAND_CRN64 : | |
786 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_crn); | |
787 | break; | |
788 | case MEP_OPERAND_CRNX : | |
789 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr, & fields->f_crnx); | |
790 | break; | |
791 | case MEP_OPERAND_CRNX64 : | |
792 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_cr64, & fields->f_crnx); | |
793 | break; | |
794 | case MEP_OPERAND_CSRN : | |
795 | errmsg = parse_csrn (cd, strp, & mep_cgen_opval_h_csr, & fields->f_csrn); | |
796 | break; | |
797 | case MEP_OPERAND_CSRN_IDX : | |
798 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_CSRN_IDX, (unsigned long *) (& fields->f_csrn)); | |
799 | break; | |
800 | case MEP_OPERAND_DBG : | |
801 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
802 | break; | |
803 | case MEP_OPERAND_DEPC : | |
804 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
805 | break; | |
806 | case MEP_OPERAND_EPC : | |
807 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
808 | break; | |
809 | case MEP_OPERAND_EXC : | |
810 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
811 | break; | |
812 | case MEP_OPERAND_FMAX_CCRN : | |
813 | errmsg = parse_fmax_ccr (cd, strp, & mep_cgen_opval_h_ccr, & fields->f_fmax_4_4); | |
814 | break; | |
815 | case MEP_OPERAND_FMAX_FRD : | |
816 | errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frd); | |
817 | break; | |
818 | case MEP_OPERAND_FMAX_FRD_INT : | |
819 | errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frd); | |
820 | break; | |
821 | case MEP_OPERAND_FMAX_FRM : | |
822 | errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frm); | |
823 | break; | |
824 | case MEP_OPERAND_FMAX_FRN : | |
825 | errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frn); | |
826 | break; | |
827 | case MEP_OPERAND_FMAX_FRN_INT : | |
828 | errmsg = parse_fmax_cr (cd, strp, & mep_cgen_opval_h_cr, & fields->f_fmax_frn); | |
829 | break; | |
830 | case MEP_OPERAND_FMAX_RM : | |
831 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_fmax_rm); | |
832 | break; | |
833 | case MEP_OPERAND_HI : | |
834 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
835 | break; | |
836 | case MEP_OPERAND_LO : | |
837 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
838 | break; | |
839 | case MEP_OPERAND_LP : | |
840 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
841 | break; | |
842 | case MEP_OPERAND_MB0 : | |
843 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
844 | break; | |
845 | case MEP_OPERAND_MB1 : | |
846 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
847 | break; | |
848 | case MEP_OPERAND_ME0 : | |
849 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
850 | break; | |
851 | case MEP_OPERAND_ME1 : | |
852 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
853 | break; | |
854 | case MEP_OPERAND_NPC : | |
855 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
856 | break; | |
857 | case MEP_OPERAND_OPT : | |
858 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
859 | break; | |
860 | case MEP_OPERAND_PCABS24A2 : | |
861 | errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_PCABS24A2, (unsigned long *) (& fields->f_24u5a2n)); | |
862 | break; | |
863 | case MEP_OPERAND_PCREL12A2 : | |
864 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL12A2, (long *) (& fields->f_12s4a2)); | |
865 | break; | |
866 | case MEP_OPERAND_PCREL17A2 : | |
867 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL17A2, (long *) (& fields->f_17s16a2)); | |
868 | break; | |
869 | case MEP_OPERAND_PCREL24A2 : | |
870 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL24A2, (long *) (& fields->f_24s5a2n)); | |
871 | break; | |
872 | case MEP_OPERAND_PCREL8A2 : | |
873 | errmsg = parse_mep_align (cd, strp, MEP_OPERAND_PCREL8A2, (long *) (& fields->f_8s8a2)); | |
874 | break; | |
875 | case MEP_OPERAND_PSW : | |
876 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
877 | break; | |
878 | case MEP_OPERAND_R0 : | |
879 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk); | |
880 | break; | |
881 | case MEP_OPERAND_R1 : | |
882 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk); | |
883 | break; | |
884 | case MEP_OPERAND_RL : | |
885 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rl); | |
886 | break; | |
887 | case MEP_OPERAND_RM : | |
888 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rm); | |
889 | break; | |
890 | case MEP_OPERAND_RMA : | |
891 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rm); | |
892 | break; | |
893 | case MEP_OPERAND_RN : | |
894 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
895 | break; | |
896 | case MEP_OPERAND_RN3 : | |
897 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
898 | break; | |
899 | case MEP_OPERAND_RN3C : | |
900 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
901 | break; | |
902 | case MEP_OPERAND_RN3L : | |
903 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
904 | break; | |
905 | case MEP_OPERAND_RN3S : | |
906 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
907 | break; | |
908 | case MEP_OPERAND_RN3UC : | |
909 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
910 | break; | |
911 | case MEP_OPERAND_RN3UL : | |
912 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
913 | break; | |
914 | case MEP_OPERAND_RN3US : | |
915 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn3); | |
916 | break; | |
917 | case MEP_OPERAND_RNC : | |
918 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
919 | break; | |
920 | case MEP_OPERAND_RNL : | |
921 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
922 | break; | |
923 | case MEP_OPERAND_RNS : | |
924 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
925 | break; | |
926 | case MEP_OPERAND_RNUC : | |
927 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
928 | break; | |
929 | case MEP_OPERAND_RNUL : | |
930 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
931 | break; | |
932 | case MEP_OPERAND_RNUS : | |
933 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & fields->f_rn); | |
934 | break; | |
935 | case MEP_OPERAND_SAR : | |
936 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_csr, & junk); | |
937 | break; | |
938 | case MEP_OPERAND_SDISP16 : | |
939 | errmsg = parse_signed16 (cd, strp, MEP_OPERAND_SDISP16, (long *) (& fields->f_16s16)); | |
940 | break; | |
941 | case MEP_OPERAND_SIMM16 : | |
942 | errmsg = parse_signed16 (cd, strp, MEP_OPERAND_SIMM16, (long *) (& fields->f_16s16)); | |
943 | break; | |
944 | case MEP_OPERAND_SIMM6 : | |
945 | errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM6, (long *) (& fields->f_6s8)); | |
946 | break; | |
947 | case MEP_OPERAND_SIMM8 : | |
948 | errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_SIMM8, (long *) (& fields->f_8s8)); | |
949 | break; | |
950 | case MEP_OPERAND_SP : | |
951 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk); | |
952 | break; | |
953 | case MEP_OPERAND_SPR : | |
954 | errmsg = parse_spreg (cd, strp, & mep_cgen_opval_h_gpr, & junk); | |
955 | break; | |
956 | case MEP_OPERAND_TP : | |
957 | errmsg = cgen_parse_keyword (cd, strp, & mep_cgen_opval_h_gpr, & junk); | |
958 | break; | |
959 | case MEP_OPERAND_TPR : | |
960 | errmsg = parse_tpreg (cd, strp, & mep_cgen_opval_h_gpr, & junk); | |
961 | break; | |
962 | case MEP_OPERAND_UDISP2 : | |
963 | errmsg = cgen_parse_signed_integer (cd, strp, MEP_OPERAND_UDISP2, (long *) (& fields->f_2u6)); | |
964 | break; | |
965 | case MEP_OPERAND_UDISP7 : | |
966 | errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7, (unsigned long *) (& fields->f_7u9)); | |
967 | break; | |
968 | case MEP_OPERAND_UDISP7A2 : | |
969 | errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7A2, (unsigned long *) (& fields->f_7u9a2)); | |
970 | break; | |
971 | case MEP_OPERAND_UDISP7A4 : | |
972 | errmsg = parse_unsigned7 (cd, strp, MEP_OPERAND_UDISP7A4, (unsigned long *) (& fields->f_7u9a4)); | |
973 | break; | |
974 | case MEP_OPERAND_UIMM16 : | |
975 | errmsg = parse_unsigned16 (cd, strp, MEP_OPERAND_UIMM16, (unsigned long *) (& fields->f_16u16)); | |
976 | break; | |
977 | case MEP_OPERAND_UIMM2 : | |
978 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM2, (unsigned long *) (& fields->f_2u10)); | |
979 | break; | |
980 | case MEP_OPERAND_UIMM24 : | |
981 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM24, (unsigned long *) (& fields->f_24u8n)); | |
982 | break; | |
983 | case MEP_OPERAND_UIMM3 : | |
984 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM3, (unsigned long *) (& fields->f_3u5)); | |
985 | break; | |
986 | case MEP_OPERAND_UIMM4 : | |
987 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM4, (unsigned long *) (& fields->f_4u8)); | |
988 | break; | |
989 | case MEP_OPERAND_UIMM5 : | |
990 | errmsg = cgen_parse_unsigned_integer (cd, strp, MEP_OPERAND_UIMM5, (unsigned long *) (& fields->f_5u8)); | |
991 | break; | |
992 | case MEP_OPERAND_UIMM7A4 : | |
993 | errmsg = parse_mep_alignu (cd, strp, MEP_OPERAND_UIMM7A4, (unsigned long *) (& fields->f_7u9a4)); | |
994 | break; | |
995 | case MEP_OPERAND_ZERO : | |
996 | errmsg = parse_zero (cd, strp, MEP_OPERAND_ZERO, (long *) (& junk)); | |
997 | break; | |
998 | ||
999 | default : | |
1000 | /* xgettext:c-format */ | |
1001 | fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); | |
1002 | abort (); | |
1003 | } | |
1004 | ||
1005 | return errmsg; | |
1006 | } | |
1007 | ||
1008 | cgen_parse_fn * const mep_cgen_parse_handlers[] = | |
1009 | { | |
1010 | parse_insn_normal, | |
1011 | }; | |
1012 | ||
1013 | void | |
1014 | mep_cgen_init_asm (CGEN_CPU_DESC cd) | |
1015 | { | |
1016 | mep_cgen_init_opcode_table (cd); | |
1017 | mep_cgen_init_ibld_table (cd); | |
1018 | cd->parse_handlers = & mep_cgen_parse_handlers[0]; | |
1019 | cd->parse_operand = mep_cgen_parse_operand; | |
1020 | #ifdef CGEN_ASM_INIT_HOOK | |
1021 | CGEN_ASM_INIT_HOOK | |
1022 | #endif | |
1023 | } | |
1024 | ||
1025 | \f | |
1026 | ||
1027 | /* Regex construction routine. | |
1028 | ||
1029 | This translates an opcode syntax string into a regex string, | |
1030 | by replacing any non-character syntax element (such as an | |
1031 | opcode) with the pattern '.*' | |
1032 | ||
1033 | It then compiles the regex and stores it in the opcode, for | |
1034 | later use by mep_cgen_assemble_insn | |
1035 | ||
1036 | Returns NULL for success, an error message for failure. */ | |
1037 | ||
1038 | char * | |
1039 | mep_cgen_build_insn_regex (CGEN_INSN *insn) | |
1040 | { | |
1041 | CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); | |
1042 | const char *mnem = CGEN_INSN_MNEMONIC (insn); | |
1043 | char rxbuf[CGEN_MAX_RX_ELEMENTS]; | |
1044 | char *rx = rxbuf; | |
1045 | const CGEN_SYNTAX_CHAR_TYPE *syn; | |
1046 | int reg_err; | |
1047 | ||
1048 | syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); | |
1049 | ||
1050 | /* Mnemonics come first in the syntax string. */ | |
1051 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
1052 | return _("missing mnemonic in syntax string"); | |
1053 | ++syn; | |
1054 | ||
1055 | /* Generate a case sensitive regular expression that emulates case | |
1056 | insensitive matching in the "C" locale. We cannot generate a case | |
1057 | insensitive regular expression because in Turkish locales, 'i' and 'I' | |
1058 | are not equal modulo case conversion. */ | |
1059 | ||
1060 | /* Copy the literal mnemonic out of the insn. */ | |
1061 | for (; *mnem; mnem++) | |
1062 | { | |
1063 | char c = *mnem; | |
1064 | ||
1065 | if (ISALPHA (c)) | |
1066 | { | |
1067 | *rx++ = '['; | |
1068 | *rx++ = TOLOWER (c); | |
1069 | *rx++ = TOUPPER (c); | |
1070 | *rx++ = ']'; | |
1071 | } | |
1072 | else | |
1073 | *rx++ = c; | |
1074 | } | |
1075 | ||
1076 | /* Copy any remaining literals from the syntax string into the rx. */ | |
1077 | for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) | |
1078 | { | |
1079 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
1080 | { | |
1081 | char c = CGEN_SYNTAX_CHAR (* syn); | |
1082 | ||
1083 | switch (c) | |
1084 | { | |
1085 | /* Escape any regex metacharacters in the syntax. */ | |
1086 | case '.': case '[': case '\\': | |
1087 | case '*': case '^': case '$': | |
1088 | ||
1089 | #ifdef CGEN_ESCAPE_EXTENDED_REGEX | |
1090 | case '?': case '{': case '}': | |
1091 | case '(': case ')': case '*': | |
1092 | case '|': case '+': case ']': | |
1093 | #endif | |
1094 | *rx++ = '\\'; | |
1095 | *rx++ = c; | |
1096 | break; | |
1097 | ||
1098 | default: | |
1099 | if (ISALPHA (c)) | |
1100 | { | |
1101 | *rx++ = '['; | |
1102 | *rx++ = TOLOWER (c); | |
1103 | *rx++ = TOUPPER (c); | |
1104 | *rx++ = ']'; | |
1105 | } | |
1106 | else | |
1107 | *rx++ = c; | |
1108 | break; | |
1109 | } | |
1110 | } | |
1111 | else | |
1112 | { | |
1113 | /* Replace non-syntax fields with globs. */ | |
1114 | *rx++ = '.'; | |
1115 | *rx++ = '*'; | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | /* Trailing whitespace ok. */ | |
1120 | * rx++ = '['; | |
1121 | * rx++ = ' '; | |
1122 | * rx++ = '\t'; | |
1123 | * rx++ = ']'; | |
1124 | * rx++ = '*'; | |
1125 | ||
1126 | /* But anchor it after that. */ | |
1127 | * rx++ = '$'; | |
1128 | * rx = '\0'; | |
1129 | ||
1130 | CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); | |
1131 | reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); | |
1132 | ||
1133 | if (reg_err == 0) | |
1134 | return NULL; | |
1135 | else | |
1136 | { | |
1137 | static char msg[80]; | |
1138 | ||
1139 | regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); | |
1140 | regfree ((regex_t *) CGEN_INSN_RX (insn)); | |
1141 | free (CGEN_INSN_RX (insn)); | |
1142 | (CGEN_INSN_RX (insn)) = NULL; | |
1143 | return msg; | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | \f | |
1148 | /* Default insn parser. | |
1149 | ||
1150 | The syntax string is scanned and operands are parsed and stored in FIELDS. | |
1151 | Relocs are queued as we go via other callbacks. | |
1152 | ||
1153 | ??? Note that this is currently an all-or-nothing parser. If we fail to | |
1154 | parse the instruction, we return 0 and the caller will start over from | |
1155 | the beginning. Backtracking will be necessary in parsing subexpressions, | |
1156 | but that can be handled there. Not handling backtracking here may get | |
1157 | expensive in the case of the m68k. Deal with later. | |
1158 | ||
1159 | Returns NULL for success, an error message for failure. */ | |
1160 | ||
1161 | static const char * | |
1162 | parse_insn_normal (CGEN_CPU_DESC cd, | |
1163 | const CGEN_INSN *insn, | |
1164 | const char **strp, | |
1165 | CGEN_FIELDS *fields) | |
1166 | { | |
1167 | /* ??? Runtime added insns not handled yet. */ | |
1168 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
1169 | const char *str = *strp; | |
1170 | const char *errmsg; | |
1171 | const char *p; | |
1172 | const CGEN_SYNTAX_CHAR_TYPE * syn; | |
1173 | #ifdef CGEN_MNEMONIC_OPERANDS | |
1174 | /* FIXME: wip */ | |
1175 | int past_opcode_p; | |
1176 | #endif | |
1177 | ||
1178 | /* For now we assume the mnemonic is first (there are no leading operands). | |
1179 | We can parse it without needing to set up operand parsing. | |
1180 | GAS's input scrubber will ensure mnemonics are lowercase, but we may | |
1181 | not be called from GAS. */ | |
1182 | p = CGEN_INSN_MNEMONIC (insn); | |
1183 | while (*p && TOLOWER (*p) == TOLOWER (*str)) | |
1184 | ++p, ++str; | |
1185 | ||
1186 | if (* p) | |
1187 | return _("unrecognized instruction"); | |
1188 | ||
1189 | #ifndef CGEN_MNEMONIC_OPERANDS | |
1190 | if (* str && ! ISSPACE (* str)) | |
1191 | return _("unrecognized instruction"); | |
1192 | #endif | |
1193 | ||
1194 | CGEN_INIT_PARSE (cd); | |
1195 | cgen_init_parse_operand (cd); | |
1196 | #ifdef CGEN_MNEMONIC_OPERANDS | |
1197 | past_opcode_p = 0; | |
1198 | #endif | |
1199 | ||
1200 | /* We don't check for (*str != '\0') here because we want to parse | |
1201 | any trailing fake arguments in the syntax string. */ | |
1202 | syn = CGEN_SYNTAX_STRING (syntax); | |
1203 | ||
1204 | /* Mnemonics come first for now, ensure valid string. */ | |
1205 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
1206 | abort (); | |
1207 | ||
1208 | ++syn; | |
1209 | ||
1210 | while (* syn != 0) | |
1211 | { | |
1212 | /* Non operand chars must match exactly. */ | |
1213 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
1214 | { | |
1215 | /* FIXME: While we allow for non-GAS callers above, we assume the | |
1216 | first char after the mnemonic part is a space. */ | |
1217 | /* FIXME: We also take inappropriate advantage of the fact that | |
1218 | GAS's input scrubber will remove extraneous blanks. */ | |
1219 | if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) | |
1220 | { | |
1221 | #ifdef CGEN_MNEMONIC_OPERANDS | |
1222 | if (CGEN_SYNTAX_CHAR(* syn) == ' ') | |
1223 | past_opcode_p = 1; | |
1224 | #endif | |
1225 | ++ syn; | |
1226 | ++ str; | |
1227 | } | |
1228 | else if (*str) | |
1229 | { | |
1230 | /* Syntax char didn't match. Can't be this insn. */ | |
1231 | static char msg [80]; | |
1232 | ||
1233 | /* xgettext:c-format */ | |
1234 | sprintf (msg, _("syntax error (expected char `%c', found `%c')"), | |
1235 | CGEN_SYNTAX_CHAR(*syn), *str); | |
1236 | return msg; | |
1237 | } | |
1238 | else | |
1239 | { | |
1240 | /* Ran out of input. */ | |
1241 | static char msg [80]; | |
1242 | ||
1243 | /* xgettext:c-format */ | |
1244 | sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), | |
1245 | CGEN_SYNTAX_CHAR(*syn)); | |
1246 | return msg; | |
1247 | } | |
1248 | continue; | |
1249 | } | |
1250 | ||
1251 | /* We have an operand of some sort. */ | |
1252 | errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), | |
1253 | &str, fields); | |
1254 | if (errmsg) | |
1255 | return errmsg; | |
1256 | ||
1257 | /* Done with this operand, continue with next one. */ | |
1258 | ++ syn; | |
1259 | } | |
1260 | ||
1261 | /* If we're at the end of the syntax string, we're done. */ | |
1262 | if (* syn == 0) | |
1263 | { | |
1264 | /* FIXME: For the moment we assume a valid `str' can only contain | |
1265 | blanks now. IE: We needn't try again with a longer version of | |
1266 | the insn and it is assumed that longer versions of insns appear | |
1267 | before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ | |
1268 | while (ISSPACE (* str)) | |
1269 | ++ str; | |
1270 | ||
1271 | if (* str != '\0') | |
1272 | return _("junk at end of line"); /* FIXME: would like to include `str' */ | |
1273 | ||
1274 | return NULL; | |
1275 | } | |
1276 | ||
1277 | /* We couldn't parse it. */ | |
1278 | return _("unrecognized instruction"); | |
1279 | } | |
1280 | \f | |
1281 | /* Main entry point. | |
1282 | This routine is called for each instruction to be assembled. | |
1283 | STR points to the insn to be assembled. | |
1284 | We assume all necessary tables have been initialized. | |
1285 | The assembled instruction, less any fixups, is stored in BUF. | |
1286 | Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value | |
1287 | still needs to be converted to target byte order, otherwise BUF is an array | |
1288 | of bytes in target byte order. | |
1289 | The result is a pointer to the insn's entry in the opcode table, | |
1290 | or NULL if an error occured (an error message will have already been | |
1291 | printed). | |
1292 | ||
1293 | Note that when processing (non-alias) macro-insns, | |
1294 | this function recurses. | |
1295 | ||
1296 | ??? It's possible to make this cpu-independent. | |
1297 | One would have to deal with a few minor things. | |
1298 | At this point in time doing so would be more of a curiosity than useful | |
1299 | [for example this file isn't _that_ big], but keeping the possibility in | |
1300 | mind helps keep the design clean. */ | |
1301 | ||
1302 | const CGEN_INSN * | |
1303 | mep_cgen_assemble_insn (CGEN_CPU_DESC cd, | |
1304 | const char *str, | |
1305 | CGEN_FIELDS *fields, | |
1306 | CGEN_INSN_BYTES_PTR buf, | |
1307 | char **errmsg) | |
1308 | { | |
1309 | const char *start; | |
1310 | CGEN_INSN_LIST *ilist; | |
1311 | const char *parse_errmsg = NULL; | |
1312 | const char *insert_errmsg = NULL; | |
1313 | int recognized_mnemonic = 0; | |
1314 | ||
1315 | /* Skip leading white space. */ | |
1316 | while (ISSPACE (* str)) | |
1317 | ++ str; | |
1318 | ||
1319 | /* The instructions are stored in hashed lists. | |
1320 | Get the first in the list. */ | |
1321 | ilist = CGEN_ASM_LOOKUP_INSN (cd, str); | |
1322 | ||
1323 | /* Keep looking until we find a match. */ | |
1324 | start = str; | |
1325 | for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) | |
1326 | { | |
1327 | const CGEN_INSN *insn = ilist->insn; | |
1328 | recognized_mnemonic = 1; | |
1329 | ||
1330 | #ifdef CGEN_VALIDATE_INSN_SUPPORTED | |
1331 | /* Not usually needed as unsupported opcodes | |
1332 | shouldn't be in the hash lists. */ | |
1333 | /* Is this insn supported by the selected cpu? */ | |
1334 | if (! mep_cgen_insn_supported (cd, insn)) | |
1335 | continue; | |
1336 | #endif | |
1337 | /* If the RELAXED attribute is set, this is an insn that shouldn't be | |
1338 | chosen immediately. Instead, it is used during assembler/linker | |
1339 | relaxation if possible. */ | |
1340 | if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0) | |
1341 | continue; | |
1342 | ||
1343 | str = start; | |
1344 | ||
1345 | /* Skip this insn if str doesn't look right lexically. */ | |
1346 | if (CGEN_INSN_RX (insn) != NULL && | |
1347 | regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) | |
1348 | continue; | |
1349 | ||
1350 | /* Allow parse/insert handlers to obtain length of insn. */ | |
1351 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); | |
1352 | ||
1353 | parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); | |
1354 | if (parse_errmsg != NULL) | |
1355 | continue; | |
1356 | ||
1357 | /* ??? 0 is passed for `pc'. */ | |
1358 | insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, | |
1359 | (bfd_vma) 0); | |
1360 | if (insert_errmsg != NULL) | |
1361 | continue; | |
1362 | ||
1363 | /* It is up to the caller to actually output the insn and any | |
1364 | queued relocs. */ | |
1365 | return insn; | |
1366 | } | |
1367 | ||
1368 | { | |
1369 | static char errbuf[150]; | |
1370 | #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS | |
1371 | const char *tmp_errmsg; | |
1372 | ||
1373 | /* If requesting verbose error messages, use insert_errmsg. | |
1374 | Failing that, use parse_errmsg. */ | |
1375 | tmp_errmsg = (insert_errmsg ? insert_errmsg : | |
1376 | parse_errmsg ? parse_errmsg : | |
1377 | recognized_mnemonic ? | |
1378 | _("unrecognized form of instruction") : | |
1379 | _("unrecognized instruction")); | |
1380 | ||
1381 | if (strlen (start) > 50) | |
1382 | /* xgettext:c-format */ | |
1383 | sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); | |
1384 | else | |
1385 | /* xgettext:c-format */ | |
1386 | sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); | |
1387 | #else | |
1388 | if (strlen (start) > 50) | |
1389 | /* xgettext:c-format */ | |
1390 | sprintf (errbuf, _("bad instruction `%.50s...'"), start); | |
1391 | else | |
1392 | /* xgettext:c-format */ | |
1393 | sprintf (errbuf, _("bad instruction `%.50s'"), start); | |
1394 | #endif | |
1395 | ||
1396 | *errmsg = errbuf; | |
1397 | return NULL; | |
1398 | } | |
1399 | } |