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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 | ||
060d22b0 | 6 | Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
f6e6b40f BE |
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)); | |
6bb95a0f DB |
60 | static void put_insn_int_value |
61 | PARAMS ((CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT)); | |
62 | ||
f6e6b40f BE |
63 | \f |
64 | /* Operand insertion. */ | |
65 | ||
66 | #if ! CGEN_INT_INSN_P | |
67 | ||
68 | /* Subroutine of insert_normal. */ | |
69 | ||
70 | static CGEN_INLINE void | |
71 | insert_1 (cd, value, start, length, word_length, bufp) | |
72 | CGEN_CPU_DESC cd; | |
73 | unsigned long value; | |
74 | int start,length,word_length; | |
75 | unsigned char *bufp; | |
76 | { | |
77 | unsigned long x,mask; | |
78 | int shift; | |
79 | int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG; | |
80 | ||
aed80dae | 81 | x = bfd_get_bits (bufp, word_length, big_p); |
f6e6b40f BE |
82 | |
83 | /* Written this way to avoid undefined behaviour. */ | |
84 | mask = (((1L << (length - 1)) - 1) << 1) | 1; | |
85 | if (CGEN_INSN_LSB0_P) | |
86 | shift = (start + 1) - length; | |
87 | else | |
88 | shift = (word_length - (start + length)); | |
89 | x = (x & ~(mask << shift)) | ((value & mask) << shift); | |
90 | ||
aed80dae | 91 | bfd_put_bits ((bfd_vma) x, bufp, word_length, big_p); |
f6e6b40f BE |
92 | } |
93 | ||
94 | #endif /* ! CGEN_INT_INSN_P */ | |
95 | ||
96 | /* Default insertion routine. | |
97 | ||
98 | ATTRS is a mask of the boolean attributes. | |
99 | WORD_OFFSET is the offset in bits from the start of the insn of the value. | |
100 | WORD_LENGTH is the length of the word in bits in which the value resides. | |
101 | START is the starting bit number in the word, architecture origin. | |
102 | LENGTH is the length of VALUE in bits. | |
103 | TOTAL_LENGTH is the total length of the insn in bits. | |
104 | ||
105 | The result is an error message or NULL if success. */ | |
106 | ||
107 | /* ??? This duplicates functionality with bfd's howto table and | |
108 | bfd_install_relocation. */ | |
109 | /* ??? This doesn't handle bfd_vma's. Create another function when | |
110 | necessary. */ | |
111 | ||
112 | static const char * | |
113 | insert_normal (cd, value, attrs, word_offset, start, length, word_length, | |
114 | total_length, buffer) | |
115 | CGEN_CPU_DESC cd; | |
116 | long value; | |
117 | unsigned int attrs; | |
118 | unsigned int word_offset, start, length, word_length, total_length; | |
119 | CGEN_INSN_BYTES_PTR buffer; | |
120 | { | |
121 | static char errbuf[100]; | |
122 | /* Written this way to avoid undefined behaviour. */ | |
123 | unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1; | |
124 | ||
125 | /* If LENGTH is zero, this operand doesn't contribute to the value. */ | |
126 | if (length == 0) | |
127 | return NULL; | |
128 | ||
6bb95a0f | 129 | #if 0 |
f6e6b40f BE |
130 | if (CGEN_INT_INSN_P |
131 | && word_offset != 0) | |
132 | abort (); | |
6bb95a0f | 133 | #endif |
f6e6b40f BE |
134 | |
135 | if (word_length > 32) | |
136 | abort (); | |
137 | ||
138 | /* For architectures with insns smaller than the base-insn-bitsize, | |
139 | word_length may be too big. */ | |
140 | if (cd->min_insn_bitsize < cd->base_insn_bitsize) | |
141 | { | |
142 | if (word_offset == 0 | |
143 | && word_length > total_length) | |
144 | word_length = total_length; | |
145 | } | |
146 | ||
147 | /* Ensure VALUE will fit. */ | |
17f0ac84 GK |
148 | if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT)) |
149 | { | |
150 | long minval = - (1L << (length - 1)); | |
151 | unsigned long maxval = mask; | |
152 | ||
153 | if ((value > 0 && (unsigned long) value > maxval) | |
154 | || value < minval) | |
155 | { | |
156 | /* xgettext:c-format */ | |
157 | sprintf (errbuf, | |
158 | _("operand out of range (%ld not between %ld and %lu)"), | |
159 | value, minval, maxval); | |
160 | return errbuf; | |
161 | } | |
162 | } | |
163 | else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)) | |
f6e6b40f BE |
164 | { |
165 | unsigned long maxval = mask; | |
166 | ||
167 | if ((unsigned long) value > maxval) | |
168 | { | |
169 | /* xgettext:c-format */ | |
170 | sprintf (errbuf, | |
171 | _("operand out of range (%lu not between 0 and %lu)"), | |
172 | value, maxval); | |
173 | return errbuf; | |
174 | } | |
175 | } | |
176 | else | |
177 | { | |
178 | if (! cgen_signed_overflow_ok_p (cd)) | |
179 | { | |
180 | long minval = - (1L << (length - 1)); | |
181 | long maxval = (1L << (length - 1)) - 1; | |
182 | ||
183 | if (value < minval || value > maxval) | |
184 | { | |
185 | sprintf | |
186 | /* xgettext:c-format */ | |
187 | (errbuf, _("operand out of range (%ld not between %ld and %ld)"), | |
188 | value, minval, maxval); | |
189 | return errbuf; | |
190 | } | |
191 | } | |
192 | } | |
193 | ||
194 | #if CGEN_INT_INSN_P | |
195 | ||
196 | { | |
197 | int shift; | |
198 | ||
199 | if (CGEN_INSN_LSB0_P) | |
6bb95a0f | 200 | shift = (word_offset + start + 1) - length; |
f6e6b40f | 201 | else |
6bb95a0f | 202 | shift = total_length - (word_offset + start + length); |
f6e6b40f BE |
203 | *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift); |
204 | } | |
205 | ||
206 | #else /* ! CGEN_INT_INSN_P */ | |
207 | ||
208 | { | |
209 | unsigned char *bufp = (unsigned char *) buffer + word_offset / 8; | |
210 | ||
211 | insert_1 (cd, value, start, length, word_length, bufp); | |
212 | } | |
213 | ||
214 | #endif /* ! CGEN_INT_INSN_P */ | |
215 | ||
216 | return NULL; | |
217 | } | |
218 | ||
219 | /* Default insn builder (insert handler). | |
0e70c820 BE |
220 | The instruction is recorded in CGEN_INT_INSN_P byte order (meaning |
221 | that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is | |
222 | recorded in host byte order, otherwise BUFFER is an array of bytes | |
223 | and the value is recorded in target byte order). | |
f6e6b40f BE |
224 | The result is an error message or NULL if success. */ |
225 | ||
226 | static const char * | |
227 | insert_insn_normal (cd, insn, fields, buffer, pc) | |
228 | CGEN_CPU_DESC cd; | |
229 | const CGEN_INSN * insn; | |
230 | CGEN_FIELDS * fields; | |
231 | CGEN_INSN_BYTES_PTR buffer; | |
232 | bfd_vma pc; | |
233 | { | |
234 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
235 | unsigned long value; | |
4a9f416d | 236 | const CGEN_SYNTAX_CHAR_TYPE * syn; |
f6e6b40f BE |
237 | |
238 | CGEN_INIT_INSERT (cd); | |
239 | value = CGEN_INSN_BASE_VALUE (insn); | |
240 | ||
241 | /* If we're recording insns as numbers (rather than a string of bytes), | |
242 | target byte order handling is deferred until later. */ | |
243 | ||
244 | #if CGEN_INT_INSN_P | |
245 | ||
6bb95a0f DB |
246 | put_insn_int_value (cd, buffer, cd->base_insn_bitsize, |
247 | CGEN_FIELDS_BITSIZE (fields), value); | |
f6e6b40f BE |
248 | |
249 | #else | |
250 | ||
251 | cgen_put_insn_value (cd, buffer, min (cd->base_insn_bitsize, | |
252 | CGEN_FIELDS_BITSIZE (fields)), | |
253 | value); | |
254 | ||
255 | #endif /* ! CGEN_INT_INSN_P */ | |
256 | ||
257 | /* ??? It would be better to scan the format's fields. | |
258 | Still need to be able to insert a value based on the operand though; | |
259 | e.g. storing a branch displacement that got resolved later. | |
260 | Needs more thought first. */ | |
261 | ||
4a9f416d | 262 | for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn) |
f6e6b40f BE |
263 | { |
264 | const char *errmsg; | |
265 | ||
266 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
267 | continue; | |
268 | ||
269 | errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn), | |
270 | fields, buffer, pc); | |
271 | if (errmsg) | |
272 | return errmsg; | |
273 | } | |
274 | ||
275 | return NULL; | |
276 | } | |
6bb95a0f DB |
277 | |
278 | /* Cover function to store an insn value into an integral insn. Must go here | |
279 | because it needs <prefix>-desc.h for CGEN_INT_INSN_P. */ | |
280 | ||
281 | static void | |
282 | put_insn_int_value (cd, buf, length, insn_length, value) | |
fca2040b | 283 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; |
6bb95a0f DB |
284 | CGEN_INSN_BYTES_PTR buf; |
285 | int length; | |
286 | int insn_length; | |
287 | CGEN_INSN_INT value; | |
288 | { | |
289 | /* For architectures with insns smaller than the base-insn-bitsize, | |
290 | length may be too big. */ | |
291 | if (length > insn_length) | |
292 | *buf = value; | |
293 | else | |
294 | { | |
295 | int shift = insn_length - length; | |
296 | /* Written this way to avoid undefined behaviour. */ | |
297 | CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1; | |
298 | *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift); | |
299 | } | |
300 | } | |
f6e6b40f BE |
301 | \f |
302 | /* Operand extraction. */ | |
303 | ||
304 | #if ! CGEN_INT_INSN_P | |
305 | ||
306 | /* Subroutine of extract_normal. | |
307 | Ensure sufficient bytes are cached in EX_INFO. | |
308 | OFFSET is the offset in bytes from the start of the insn of the value. | |
309 | BYTES is the length of the needed value. | |
310 | Returns 1 for success, 0 for failure. */ | |
311 | ||
312 | static CGEN_INLINE int | |
313 | fill_cache (cd, ex_info, offset, bytes, pc) | |
314 | CGEN_CPU_DESC cd; | |
315 | CGEN_EXTRACT_INFO *ex_info; | |
316 | int offset, bytes; | |
317 | bfd_vma pc; | |
318 | { | |
319 | /* It's doubtful that the middle part has already been fetched so | |
320 | we don't optimize that case. kiss. */ | |
321 | int mask; | |
322 | disassemble_info *info = (disassemble_info *) ex_info->dis_info; | |
323 | ||
324 | /* First do a quick check. */ | |
325 | mask = (1 << bytes) - 1; | |
326 | if (((ex_info->valid >> offset) & mask) == mask) | |
327 | return 1; | |
328 | ||
329 | /* Search for the first byte we need to read. */ | |
330 | for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1) | |
331 | if (! (mask & ex_info->valid)) | |
332 | break; | |
333 | ||
334 | if (bytes) | |
335 | { | |
336 | int status; | |
337 | ||
338 | pc += offset; | |
339 | status = (*info->read_memory_func) | |
340 | (pc, ex_info->insn_bytes + offset, bytes, info); | |
341 | ||
342 | if (status != 0) | |
343 | { | |
344 | (*info->memory_error_func) (status, pc, info); | |
345 | return 0; | |
346 | } | |
347 | ||
348 | ex_info->valid |= ((1 << bytes) - 1) << offset; | |
349 | } | |
350 | ||
351 | return 1; | |
352 | } | |
353 | ||
354 | /* Subroutine of extract_normal. */ | |
355 | ||
356 | static CGEN_INLINE long | |
357 | extract_1 (cd, ex_info, start, length, word_length, bufp, pc) | |
358 | CGEN_CPU_DESC cd; | |
359 | CGEN_EXTRACT_INFO *ex_info; | |
360 | int start,length,word_length; | |
361 | unsigned char *bufp; | |
362 | bfd_vma pc; | |
363 | { | |
aed80dae | 364 | unsigned long x; |
f6e6b40f BE |
365 | int shift; |
366 | int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG; | |
367 | ||
aed80dae | 368 | x = bfd_get_bits (bufp, word_length, big_p); |
f6e6b40f | 369 | |
f6e6b40f BE |
370 | if (CGEN_INSN_LSB0_P) |
371 | shift = (start + 1) - length; | |
372 | else | |
373 | shift = (word_length - (start + length)); | |
aed80dae | 374 | return x >> shift; |
f6e6b40f BE |
375 | } |
376 | ||
377 | #endif /* ! CGEN_INT_INSN_P */ | |
378 | ||
379 | /* Default extraction routine. | |
380 | ||
381 | INSN_VALUE is the first base_insn_bitsize bits of the insn in host order, | |
382 | or sometimes less for cases like the m32r where the base insn size is 32 | |
383 | but some insns are 16 bits. | |
384 | ATTRS is a mask of the boolean attributes. We only need `SIGNED', | |
385 | but for generality we take a bitmask of all of them. | |
386 | WORD_OFFSET is the offset in bits from the start of the insn of the value. | |
387 | WORD_LENGTH is the length of the word in bits in which the value resides. | |
388 | START is the starting bit number in the word, architecture origin. | |
389 | LENGTH is the length of VALUE in bits. | |
390 | TOTAL_LENGTH is the total length of the insn in bits. | |
391 | ||
392 | Returns 1 for success, 0 for failure. */ | |
393 | ||
394 | /* ??? The return code isn't properly used. wip. */ | |
395 | ||
396 | /* ??? This doesn't handle bfd_vma's. Create another function when | |
397 | necessary. */ | |
398 | ||
399 | static int | |
400 | extract_normal (cd, ex_info, insn_value, attrs, word_offset, start, length, | |
401 | word_length, total_length, pc, valuep) | |
402 | CGEN_CPU_DESC cd; | |
403 | #if ! CGEN_INT_INSN_P | |
404 | CGEN_EXTRACT_INFO *ex_info; | |
405 | #else | |
406 | CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED; | |
407 | #endif | |
408 | CGEN_INSN_INT insn_value; | |
409 | unsigned int attrs; | |
410 | unsigned int word_offset, start, length, word_length, total_length; | |
411 | #if ! CGEN_INT_INSN_P | |
412 | bfd_vma pc; | |
413 | #else | |
414 | bfd_vma pc ATTRIBUTE_UNUSED; | |
415 | #endif | |
416 | long *valuep; | |
417 | { | |
aed80dae | 418 | CGEN_INSN_INT value, mask; |
f6e6b40f BE |
419 | |
420 | /* If LENGTH is zero, this operand doesn't contribute to the value | |
421 | so give it a standard value of zero. */ | |
422 | if (length == 0) | |
423 | { | |
424 | *valuep = 0; | |
425 | return 1; | |
426 | } | |
427 | ||
6bb95a0f | 428 | #if 0 |
f6e6b40f BE |
429 | if (CGEN_INT_INSN_P |
430 | && word_offset != 0) | |
431 | abort (); | |
6bb95a0f | 432 | #endif |
f6e6b40f BE |
433 | |
434 | if (word_length > 32) | |
435 | abort (); | |
436 | ||
437 | /* For architectures with insns smaller than the insn-base-bitsize, | |
438 | word_length may be too big. */ | |
439 | if (cd->min_insn_bitsize < cd->base_insn_bitsize) | |
440 | { | |
441 | if (word_offset == 0 | |
442 | && word_length > total_length) | |
443 | word_length = total_length; | |
444 | } | |
445 | ||
a00ad97d | 446 | /* Does the value reside in INSN_VALUE, and at the right alignment? */ |
f6e6b40f | 447 | |
a00ad97d | 448 | if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length)) |
f6e6b40f | 449 | { |
f6e6b40f | 450 | if (CGEN_INSN_LSB0_P) |
6bb95a0f | 451 | value = insn_value >> ((word_offset + start + 1) - length); |
f6e6b40f | 452 | else |
6bb95a0f | 453 | value = insn_value >> (total_length - ( word_offset + start + length)); |
f6e6b40f BE |
454 | } |
455 | ||
456 | #if ! CGEN_INT_INSN_P | |
457 | ||
458 | else | |
459 | { | |
460 | unsigned char *bufp = ex_info->insn_bytes + word_offset / 8; | |
461 | ||
462 | if (word_length > 32) | |
463 | abort (); | |
464 | ||
465 | if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0) | |
466 | return 0; | |
467 | ||
468 | value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc); | |
469 | } | |
470 | ||
471 | #endif /* ! CGEN_INT_INSN_P */ | |
472 | ||
aed80dae FCE |
473 | /* Written this way to avoid undefined behaviour. */ |
474 | mask = (((1L << (length - 1)) - 1) << 1) | 1; | |
475 | ||
476 | value &= mask; | |
477 | /* sign extend? */ | |
478 | if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED) | |
479 | && (value & (1L << (length - 1)))) | |
480 | value |= ~mask; | |
481 | ||
f6e6b40f BE |
482 | *valuep = value; |
483 | ||
484 | return 1; | |
485 | } | |
486 | ||
487 | /* Default insn extractor. | |
488 | ||
489 | INSN_VALUE is the first base_insn_bitsize bits, translated to host order. | |
490 | The extracted fields are stored in FIELDS. | |
491 | EX_INFO is used to handle reading variable length insns. | |
492 | Return the length of the insn in bits, or 0 if no match, | |
493 | or -1 if an error occurs fetching data (memory_error_func will have | |
494 | been called). */ | |
495 | ||
496 | static int | |
497 | extract_insn_normal (cd, insn, ex_info, insn_value, fields, pc) | |
498 | CGEN_CPU_DESC cd; | |
499 | const CGEN_INSN *insn; | |
500 | CGEN_EXTRACT_INFO *ex_info; | |
501 | CGEN_INSN_INT insn_value; | |
502 | CGEN_FIELDS *fields; | |
503 | bfd_vma pc; | |
504 | { | |
505 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
4a9f416d | 506 | const CGEN_SYNTAX_CHAR_TYPE *syn; |
f6e6b40f BE |
507 | |
508 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); | |
509 | ||
510 | CGEN_INIT_EXTRACT (cd); | |
511 | ||
512 | for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) | |
513 | { | |
514 | int length; | |
515 | ||
516 | if (CGEN_SYNTAX_CHAR_P (*syn)) | |
517 | continue; | |
518 | ||
519 | length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn), | |
520 | ex_info, insn_value, fields, pc); | |
521 | if (length <= 0) | |
522 | return length; | |
523 | } | |
524 | ||
525 | /* We recognized and successfully extracted this insn. */ | |
526 | return CGEN_INSN_BITSIZE (insn); | |
527 | } | |
528 | \f | |
529 | /* machine generated code added here */ |