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f6e6b40f BE |
1 | /* Instruction building/extraction support for @arch@. -*- C -*- |
2 | ||
3 | THIS FILE IS MACHINE GENERATED WITH CGEN: Cpu tools GENerator. | |
4 | - the resultant file is machine generated, cgen-ibld.in isn't | |
5 | ||
6 | Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. | |
7 | ||
8 | This file is part of the GNU Binutils and GDB, the GNU debugger. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software Foundation, Inc., | |
22 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
23 | ||
24 | /* ??? Eventually more and more of this stuff can go to cpu-independent files. | |
25 | Keep that in mind. */ | |
26 | ||
27 | #include "sysdep.h" | |
28 | #include <ctype.h> | |
29 | #include <stdio.h> | |
30 | #include "ansidecl.h" | |
31 | #include "dis-asm.h" | |
32 | #include "bfd.h" | |
33 | #include "symcat.h" | |
34 | #include "@prefix@-desc.h" | |
35 | #include "@prefix@-opc.h" | |
36 | #include "opintl.h" | |
37 | ||
38 | #undef min | |
39 | #define min(a,b) ((a) < (b) ? (a) : (b)) | |
40 | #undef max | |
41 | #define max(a,b) ((a) > (b) ? (a) : (b)) | |
42 | ||
43 | /* Used by the ifield rtx function. */ | |
44 | #define FLD(f) (fields->f) | |
45 | ||
46 | static const char * insert_normal | |
47 | PARAMS ((CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int, | |
48 | unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR)); | |
49 | static const char * insert_insn_normal | |
50 | PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, | |
51 | CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma)); | |
52 | ||
53 | static int extract_normal | |
54 | PARAMS ((CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, | |
55 | unsigned int, unsigned int, unsigned int, unsigned int, | |
56 | unsigned int, unsigned int, bfd_vma, long *)); | |
57 | static int extract_insn_normal | |
58 | PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *, | |
59 | CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma)); | |
60 | \f | |
61 | /* Operand insertion. */ | |
62 | ||
63 | #if ! CGEN_INT_INSN_P | |
64 | ||
65 | /* Subroutine of insert_normal. */ | |
66 | ||
67 | static CGEN_INLINE void | |
68 | insert_1 (cd, value, start, length, word_length, bufp) | |
69 | CGEN_CPU_DESC cd; | |
70 | unsigned long value; | |
71 | int start,length,word_length; | |
72 | unsigned char *bufp; | |
73 | { | |
74 | unsigned long x,mask; | |
75 | int shift; | |
76 | int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG; | |
77 | ||
78 | switch (word_length) | |
79 | { | |
80 | case 8: | |
81 | x = *bufp; | |
82 | break; | |
83 | case 16: | |
84 | if (big_p) | |
85 | x = bfd_getb16 (bufp); | |
86 | else | |
87 | x = bfd_getl16 (bufp); | |
88 | break; | |
89 | case 24: | |
90 | /* ??? This may need reworking as these cases don't necessarily | |
91 | want the first byte and the last two bytes handled like this. */ | |
92 | if (big_p) | |
93 | x = (bufp[0] << 16) | bfd_getb16 (bufp + 1); | |
94 | else | |
95 | x = bfd_getl16 (bufp) | (bufp[2] << 16); | |
96 | break; | |
97 | case 32: | |
98 | if (big_p) | |
99 | x = bfd_getb32 (bufp); | |
100 | else | |
101 | x = bfd_getl32 (bufp); | |
102 | break; | |
103 | default : | |
104 | abort (); | |
105 | } | |
106 | ||
107 | /* Written this way to avoid undefined behaviour. */ | |
108 | mask = (((1L << (length - 1)) - 1) << 1) | 1; | |
109 | if (CGEN_INSN_LSB0_P) | |
110 | shift = (start + 1) - length; | |
111 | else | |
112 | shift = (word_length - (start + length)); | |
113 | x = (x & ~(mask << shift)) | ((value & mask) << shift); | |
114 | ||
115 | switch (word_length) | |
116 | { | |
117 | case 8: | |
118 | *bufp = x; | |
119 | break; | |
120 | case 16: | |
121 | if (big_p) | |
122 | bfd_putb16 (x, bufp); | |
123 | else | |
124 | bfd_putl16 (x, bufp); | |
125 | break; | |
126 | case 24: | |
127 | /* ??? This may need reworking as these cases don't necessarily | |
128 | want the first byte and the last two bytes handled like this. */ | |
129 | if (big_p) | |
130 | { | |
131 | bufp[0] = x >> 16; | |
132 | bfd_putb16 (x, bufp + 1); | |
133 | } | |
134 | else | |
135 | { | |
136 | bfd_putl16 (x, bufp); | |
137 | bufp[2] = x >> 16; | |
138 | } | |
139 | break; | |
140 | case 32: | |
141 | if (big_p) | |
142 | bfd_putb32 (x, bufp); | |
143 | else | |
144 | bfd_putl32 (x, bufp); | |
145 | break; | |
146 | default : | |
147 | abort (); | |
148 | } | |
149 | } | |
150 | ||
151 | #endif /* ! CGEN_INT_INSN_P */ | |
152 | ||
153 | /* Default insertion routine. | |
154 | ||
155 | ATTRS is a mask of the boolean attributes. | |
156 | WORD_OFFSET is the offset in bits from the start of the insn of the value. | |
157 | WORD_LENGTH is the length of the word in bits in which the value resides. | |
158 | START is the starting bit number in the word, architecture origin. | |
159 | LENGTH is the length of VALUE in bits. | |
160 | TOTAL_LENGTH is the total length of the insn in bits. | |
161 | ||
162 | The result is an error message or NULL if success. */ | |
163 | ||
164 | /* ??? This duplicates functionality with bfd's howto table and | |
165 | bfd_install_relocation. */ | |
166 | /* ??? This doesn't handle bfd_vma's. Create another function when | |
167 | necessary. */ | |
168 | ||
169 | static const char * | |
170 | insert_normal (cd, value, attrs, word_offset, start, length, word_length, | |
171 | total_length, buffer) | |
172 | CGEN_CPU_DESC cd; | |
173 | long value; | |
174 | unsigned int attrs; | |
175 | unsigned int word_offset, start, length, word_length, total_length; | |
176 | CGEN_INSN_BYTES_PTR buffer; | |
177 | { | |
178 | static char errbuf[100]; | |
179 | /* Written this way to avoid undefined behaviour. */ | |
180 | unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1; | |
181 | ||
182 | /* If LENGTH is zero, this operand doesn't contribute to the value. */ | |
183 | if (length == 0) | |
184 | return NULL; | |
185 | ||
186 | if (CGEN_INT_INSN_P | |
187 | && word_offset != 0) | |
188 | abort (); | |
189 | ||
190 | if (word_length > 32) | |
191 | abort (); | |
192 | ||
193 | /* For architectures with insns smaller than the base-insn-bitsize, | |
194 | word_length may be too big. */ | |
195 | if (cd->min_insn_bitsize < cd->base_insn_bitsize) | |
196 | { | |
197 | if (word_offset == 0 | |
198 | && word_length > total_length) | |
199 | word_length = total_length; | |
200 | } | |
201 | ||
202 | /* Ensure VALUE will fit. */ | |
203 | if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)) | |
204 | { | |
205 | unsigned long maxval = mask; | |
206 | ||
207 | if ((unsigned long) value > maxval) | |
208 | { | |
209 | /* xgettext:c-format */ | |
210 | sprintf (errbuf, | |
211 | _("operand out of range (%lu not between 0 and %lu)"), | |
212 | value, maxval); | |
213 | return errbuf; | |
214 | } | |
215 | } | |
216 | else | |
217 | { | |
218 | if (! cgen_signed_overflow_ok_p (cd)) | |
219 | { | |
220 | long minval = - (1L << (length - 1)); | |
221 | long maxval = (1L << (length - 1)) - 1; | |
222 | ||
223 | if (value < minval || value > maxval) | |
224 | { | |
225 | sprintf | |
226 | /* xgettext:c-format */ | |
227 | (errbuf, _("operand out of range (%ld not between %ld and %ld)"), | |
228 | value, minval, maxval); | |
229 | return errbuf; | |
230 | } | |
231 | } | |
232 | } | |
233 | ||
234 | #if CGEN_INT_INSN_P | |
235 | ||
236 | { | |
237 | int shift; | |
238 | ||
239 | if (CGEN_INSN_LSB0_P) | |
240 | shift = (start + 1) - length; | |
241 | else | |
242 | shift = word_length - (start + length); | |
243 | *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift); | |
244 | } | |
245 | ||
246 | #else /* ! CGEN_INT_INSN_P */ | |
247 | ||
248 | { | |
249 | unsigned char *bufp = (unsigned char *) buffer + word_offset / 8; | |
250 | ||
251 | insert_1 (cd, value, start, length, word_length, bufp); | |
252 | } | |
253 | ||
254 | #endif /* ! CGEN_INT_INSN_P */ | |
255 | ||
256 | return NULL; | |
257 | } | |
258 | ||
259 | /* Default insn builder (insert handler). | |
260 | The instruction is recorded in CGEN_INT_INSN_P byte order | |
261 | (meaning that if CGEN_INT_INSN_P BUFFER is an int * and thus the value is | |
262 | recorded in host byte order, otherwise BUFFER is an array of bytes and the | |
263 | value is recorded in target byte order). | |
264 | The result is an error message or NULL if success. */ | |
265 | ||
266 | static const char * | |
267 | insert_insn_normal (cd, insn, fields, buffer, pc) | |
268 | CGEN_CPU_DESC cd; | |
269 | const CGEN_INSN * insn; | |
270 | CGEN_FIELDS * fields; | |
271 | CGEN_INSN_BYTES_PTR buffer; | |
272 | bfd_vma pc; | |
273 | { | |
274 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
275 | unsigned long value; | |
276 | const unsigned char * syn; | |
277 | ||
278 | CGEN_INIT_INSERT (cd); | |
279 | value = CGEN_INSN_BASE_VALUE (insn); | |
280 | ||
281 | /* If we're recording insns as numbers (rather than a string of bytes), | |
282 | target byte order handling is deferred until later. */ | |
283 | ||
284 | #if CGEN_INT_INSN_P | |
285 | ||
286 | *buffer = value; | |
287 | ||
288 | #else | |
289 | ||
290 | cgen_put_insn_value (cd, buffer, min (cd->base_insn_bitsize, | |
291 | CGEN_FIELDS_BITSIZE (fields)), | |
292 | value); | |
293 | ||
294 | #endif /* ! CGEN_INT_INSN_P */ | |
295 | ||
296 | /* ??? It would be better to scan the format's fields. | |
297 | Still need to be able to insert a value based on the operand though; | |
298 | e.g. storing a branch displacement that got resolved later. | |
299 | Needs more thought first. */ | |
300 | ||
301 | for (syn = CGEN_SYNTAX_STRING (syntax); * syn != '\0'; ++ syn) | |
302 | { | |
303 | const char *errmsg; | |
304 | ||
305 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
306 | continue; | |
307 | ||
308 | errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn), | |
309 | fields, buffer, pc); | |
310 | if (errmsg) | |
311 | return errmsg; | |
312 | } | |
313 | ||
314 | return NULL; | |
315 | } | |
316 | \f | |
317 | /* Operand extraction. */ | |
318 | ||
319 | #if ! CGEN_INT_INSN_P | |
320 | ||
321 | /* Subroutine of extract_normal. | |
322 | Ensure sufficient bytes are cached in EX_INFO. | |
323 | OFFSET is the offset in bytes from the start of the insn of the value. | |
324 | BYTES is the length of the needed value. | |
325 | Returns 1 for success, 0 for failure. */ | |
326 | ||
327 | static CGEN_INLINE int | |
328 | fill_cache (cd, ex_info, offset, bytes, pc) | |
329 | CGEN_CPU_DESC cd; | |
330 | CGEN_EXTRACT_INFO *ex_info; | |
331 | int offset, bytes; | |
332 | bfd_vma pc; | |
333 | { | |
334 | /* It's doubtful that the middle part has already been fetched so | |
335 | we don't optimize that case. kiss. */ | |
336 | int mask; | |
337 | disassemble_info *info = (disassemble_info *) ex_info->dis_info; | |
338 | ||
339 | /* First do a quick check. */ | |
340 | mask = (1 << bytes) - 1; | |
341 | if (((ex_info->valid >> offset) & mask) == mask) | |
342 | return 1; | |
343 | ||
344 | /* Search for the first byte we need to read. */ | |
345 | for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1) | |
346 | if (! (mask & ex_info->valid)) | |
347 | break; | |
348 | ||
349 | if (bytes) | |
350 | { | |
351 | int status; | |
352 | ||
353 | pc += offset; | |
354 | status = (*info->read_memory_func) | |
355 | (pc, ex_info->insn_bytes + offset, bytes, info); | |
356 | ||
357 | if (status != 0) | |
358 | { | |
359 | (*info->memory_error_func) (status, pc, info); | |
360 | return 0; | |
361 | } | |
362 | ||
363 | ex_info->valid |= ((1 << bytes) - 1) << offset; | |
364 | } | |
365 | ||
366 | return 1; | |
367 | } | |
368 | ||
369 | /* Subroutine of extract_normal. */ | |
370 | ||
371 | static CGEN_INLINE long | |
372 | extract_1 (cd, ex_info, start, length, word_length, bufp, pc) | |
373 | CGEN_CPU_DESC cd; | |
374 | CGEN_EXTRACT_INFO *ex_info; | |
375 | int start,length,word_length; | |
376 | unsigned char *bufp; | |
377 | bfd_vma pc; | |
378 | { | |
379 | unsigned long x,mask; | |
380 | int shift; | |
381 | int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG; | |
382 | ||
383 | switch (word_length) | |
384 | { | |
385 | case 8: | |
386 | x = *bufp; | |
387 | break; | |
388 | case 16: | |
389 | if (big_p) | |
390 | x = bfd_getb16 (bufp); | |
391 | else | |
392 | x = bfd_getl16 (bufp); | |
393 | break; | |
394 | case 24: | |
395 | /* ??? This may need reworking as these cases don't necessarily | |
396 | want the first byte and the last two bytes handled like this. */ | |
397 | if (big_p) | |
398 | x = (bufp[0] << 16) | bfd_getb16 (bufp + 1); | |
399 | else | |
400 | x = bfd_getl16 (bufp) | (bufp[2] << 16); | |
401 | break; | |
402 | case 32: | |
403 | if (big_p) | |
404 | x = bfd_getb32 (bufp); | |
405 | else | |
406 | x = bfd_getl32 (bufp); | |
407 | break; | |
408 | default : | |
409 | abort (); | |
410 | } | |
411 | ||
412 | /* Written this way to avoid undefined behaviour. */ | |
413 | mask = (((1L << (length - 1)) - 1) << 1) | 1; | |
414 | if (CGEN_INSN_LSB0_P) | |
415 | shift = (start + 1) - length; | |
416 | else | |
417 | shift = (word_length - (start + length)); | |
418 | return (x >> shift) & mask; | |
419 | } | |
420 | ||
421 | #endif /* ! CGEN_INT_INSN_P */ | |
422 | ||
423 | /* Default extraction routine. | |
424 | ||
425 | INSN_VALUE is the first base_insn_bitsize bits of the insn in host order, | |
426 | or sometimes less for cases like the m32r where the base insn size is 32 | |
427 | but some insns are 16 bits. | |
428 | ATTRS is a mask of the boolean attributes. We only need `SIGNED', | |
429 | but for generality we take a bitmask of all of them. | |
430 | WORD_OFFSET is the offset in bits from the start of the insn of the value. | |
431 | WORD_LENGTH is the length of the word in bits in which the value resides. | |
432 | START is the starting bit number in the word, architecture origin. | |
433 | LENGTH is the length of VALUE in bits. | |
434 | TOTAL_LENGTH is the total length of the insn in bits. | |
435 | ||
436 | Returns 1 for success, 0 for failure. */ | |
437 | ||
438 | /* ??? The return code isn't properly used. wip. */ | |
439 | ||
440 | /* ??? This doesn't handle bfd_vma's. Create another function when | |
441 | necessary. */ | |
442 | ||
443 | static int | |
444 | extract_normal (cd, ex_info, insn_value, attrs, word_offset, start, length, | |
445 | word_length, total_length, pc, valuep) | |
446 | CGEN_CPU_DESC cd; | |
447 | #if ! CGEN_INT_INSN_P | |
448 | CGEN_EXTRACT_INFO *ex_info; | |
449 | #else | |
450 | CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED; | |
451 | #endif | |
452 | CGEN_INSN_INT insn_value; | |
453 | unsigned int attrs; | |
454 | unsigned int word_offset, start, length, word_length, total_length; | |
455 | #if ! CGEN_INT_INSN_P | |
456 | bfd_vma pc; | |
457 | #else | |
458 | bfd_vma pc ATTRIBUTE_UNUSED; | |
459 | #endif | |
460 | long *valuep; | |
461 | { | |
462 | CGEN_INSN_INT value; | |
463 | ||
464 | /* If LENGTH is zero, this operand doesn't contribute to the value | |
465 | so give it a standard value of zero. */ | |
466 | if (length == 0) | |
467 | { | |
468 | *valuep = 0; | |
469 | return 1; | |
470 | } | |
471 | ||
472 | if (CGEN_INT_INSN_P | |
473 | && word_offset != 0) | |
474 | abort (); | |
475 | ||
476 | if (word_length > 32) | |
477 | abort (); | |
478 | ||
479 | /* For architectures with insns smaller than the insn-base-bitsize, | |
480 | word_length may be too big. */ | |
481 | if (cd->min_insn_bitsize < cd->base_insn_bitsize) | |
482 | { | |
483 | if (word_offset == 0 | |
484 | && word_length > total_length) | |
485 | word_length = total_length; | |
486 | } | |
487 | ||
488 | /* Does the value reside in INSN_VALUE? */ | |
489 | ||
490 | if (word_offset == 0) | |
491 | { | |
492 | /* Written this way to avoid undefined behaviour. */ | |
493 | CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1; | |
494 | ||
495 | if (CGEN_INSN_LSB0_P) | |
496 | value = insn_value >> ((start + 1) - length); | |
497 | else | |
498 | value = insn_value >> (word_length - (start + length)); | |
499 | value &= mask; | |
500 | /* sign extend? */ | |
501 | if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED) | |
502 | && (value & (1L << (length - 1)))) | |
503 | value |= ~mask; | |
504 | } | |
505 | ||
506 | #if ! CGEN_INT_INSN_P | |
507 | ||
508 | else | |
509 | { | |
510 | unsigned char *bufp = ex_info->insn_bytes + word_offset / 8; | |
511 | ||
512 | if (word_length > 32) | |
513 | abort (); | |
514 | ||
515 | if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0) | |
516 | return 0; | |
517 | ||
518 | value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc); | |
519 | } | |
520 | ||
521 | #endif /* ! CGEN_INT_INSN_P */ | |
522 | ||
523 | *valuep = value; | |
524 | ||
525 | return 1; | |
526 | } | |
527 | ||
528 | /* Default insn extractor. | |
529 | ||
530 | INSN_VALUE is the first base_insn_bitsize bits, translated to host order. | |
531 | The extracted fields are stored in FIELDS. | |
532 | EX_INFO is used to handle reading variable length insns. | |
533 | Return the length of the insn in bits, or 0 if no match, | |
534 | or -1 if an error occurs fetching data (memory_error_func will have | |
535 | been called). */ | |
536 | ||
537 | static int | |
538 | extract_insn_normal (cd, insn, ex_info, insn_value, fields, pc) | |
539 | CGEN_CPU_DESC cd; | |
540 | const CGEN_INSN *insn; | |
541 | CGEN_EXTRACT_INFO *ex_info; | |
542 | CGEN_INSN_INT insn_value; | |
543 | CGEN_FIELDS *fields; | |
544 | bfd_vma pc; | |
545 | { | |
546 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
547 | const unsigned char *syn; | |
548 | ||
549 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); | |
550 | ||
551 | CGEN_INIT_EXTRACT (cd); | |
552 | ||
553 | for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) | |
554 | { | |
555 | int length; | |
556 | ||
557 | if (CGEN_SYNTAX_CHAR_P (*syn)) | |
558 | continue; | |
559 | ||
560 | length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn), | |
561 | ex_info, insn_value, fields, pc); | |
562 | if (length <= 0) | |
563 | return length; | |
564 | } | |
565 | ||
566 | /* We recognized and successfully extracted this insn. */ | |
567 | return CGEN_INSN_BITSIZE (insn); | |
568 | } | |
569 | \f | |
570 | /* machine generated code added here */ |