1 /* DO NOT EDIT! -*- buffer-read-only: t -*- vi:set ro: */
2 /* Disassembler interface for targets using CGEN. -*- C -*-
3 CGEN: Cpu tools GENerator
4
5 THIS FILE IS MACHINE GENERATED WITH CGEN.
6 - the resultant file is machine generated, cgen-dis.in isn't
7
8 Copyright (C) 1996-2023 Free Software Foundation, Inc.
9
10 This file is part of libopcodes.
11
12 This library 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 3, or (at your option)
15 any later version.
16
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.
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 "disassemble.h"
33 #include "bfd.h"
34 #include "symcat.h"
35 #include "libiberty.h"
36 #include "mt-desc.h"
37 #include "mt-opc.h"
38 #include "opintl.h"
39
40 /* Default text to print if an instruction isn't recognized. */
41 #define UNKNOWN_INSN_MSG _("*unknown*")
42
43 static void print_normal
44 (CGEN_CPU_DESC, void *, long, unsigned int, bfd_vma, int);
45 static void print_address
46 (CGEN_CPU_DESC, void *, bfd_vma, unsigned int, bfd_vma, int) ATTRIBUTE_UNUSED;
47 static void print_keyword
48 (CGEN_CPU_DESC, void *, CGEN_KEYWORD *, long, unsigned int) ATTRIBUTE_UNUSED;
49 static void print_insn_normal
50 (CGEN_CPU_DESC, void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int);
51 static int print_insn
52 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, unsigned);
53 static int default_print_insn
54 (CGEN_CPU_DESC, bfd_vma, disassemble_info *) ATTRIBUTE_UNUSED;
55 static int read_insn
56 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, int, CGEN_EXTRACT_INFO *,
57 unsigned long *);
58
59 /* -- disassembler routines inserted here. */
60
61 /* -- dis.c */
62 static void
63 print_dollarhex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
64 void * dis_info,
65 long value,
66 unsigned int attrs ATTRIBUTE_UNUSED,
67 bfd_vma pc ATTRIBUTE_UNUSED,
68 int length ATTRIBUTE_UNUSED)
69 {
70 disassemble_info *info = (disassemble_info *) dis_info;
71
72 info->fprintf_func (info->stream, "$%lx", value & 0xffffffff);
73
74 if (0)
75 print_normal (cd, dis_info, value, attrs, pc, length);
76 }
77
78 static void
79 print_pcrel (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
80 void * dis_info,
81 long value,
82 unsigned int attrs ATTRIBUTE_UNUSED,
83 bfd_vma pc ATTRIBUTE_UNUSED,
84 int length ATTRIBUTE_UNUSED)
85 {
86 print_address (cd, dis_info, value + pc, attrs, pc, length);
87 }
88
89 /* -- */
90
91 void mt_cgen_print_operand
92 (CGEN_CPU_DESC, int, void *, CGEN_FIELDS *, void const *, bfd_vma, int);
93
94 /* Main entry point for printing operands.
95 XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
96 of dis-asm.h on cgen.h.
97
98 This function is basically just a big switch statement. Earlier versions
99 used tables to look up the function to use, but
100 - if the table contains both assembler and disassembler functions then
101 the disassembler contains much of the assembler and vice-versa,
102 - there's a lot of inlining possibilities as things grow,
103 - using a switch statement avoids the function call overhead.
104
105 This function could be moved into `print_insn_normal', but keeping it
106 separate makes clear the interface between `print_insn_normal' and each of
107 the handlers. */
108
109 void
110 mt_cgen_print_operand (CGEN_CPU_DESC cd,
111 int opindex,
112 void * xinfo,
113 CGEN_FIELDS *fields,
114 void const *attrs ATTRIBUTE_UNUSED,
115 bfd_vma pc,
116 int length)
117 {
118 disassemble_info *info = (disassemble_info *) xinfo;
119
120 switch (opindex)
121 {
122 case MT_OPERAND_A23 :
123 print_dollarhex (cd, info, fields->f_a23, 0, pc, length);
124 break;
125 case MT_OPERAND_BALL :
126 print_dollarhex (cd, info, fields->f_ball, 0, pc, length);
127 break;
128 case MT_OPERAND_BALL2 :
129 print_dollarhex (cd, info, fields->f_ball2, 0, pc, length);
130 break;
131 case MT_OPERAND_BANKADDR :
132 print_dollarhex (cd, info, fields->f_bankaddr, 0, pc, length);
133 break;
134 case MT_OPERAND_BRC :
135 print_dollarhex (cd, info, fields->f_brc, 0, pc, length);
136 break;
137 case MT_OPERAND_BRC2 :
138 print_dollarhex (cd, info, fields->f_brc2, 0, pc, length);
139 break;
140 case MT_OPERAND_CB1INCR :
141 print_dollarhex (cd, info, fields->f_cb1incr, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
142 break;
143 case MT_OPERAND_CB1SEL :
144 print_dollarhex (cd, info, fields->f_cb1sel, 0, pc, length);
145 break;
146 case MT_OPERAND_CB2INCR :
147 print_dollarhex (cd, info, fields->f_cb2incr, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
148 break;
149 case MT_OPERAND_CB2SEL :
150 print_dollarhex (cd, info, fields->f_cb2sel, 0, pc, length);
151 break;
152 case MT_OPERAND_CBRB :
153 print_dollarhex (cd, info, fields->f_cbrb, 0, pc, length);
154 break;
155 case MT_OPERAND_CBS :
156 print_dollarhex (cd, info, fields->f_cbs, 0, pc, length);
157 break;
158 case MT_OPERAND_CBX :
159 print_dollarhex (cd, info, fields->f_cbx, 0, pc, length);
160 break;
161 case MT_OPERAND_CCB :
162 print_dollarhex (cd, info, fields->f_ccb, 0, pc, length);
163 break;
164 case MT_OPERAND_CDB :
165 print_dollarhex (cd, info, fields->f_cdb, 0, pc, length);
166 break;
167 case MT_OPERAND_CELL :
168 print_dollarhex (cd, info, fields->f_cell, 0, pc, length);
169 break;
170 case MT_OPERAND_COLNUM :
171 print_dollarhex (cd, info, fields->f_colnum, 0, pc, length);
172 break;
173 case MT_OPERAND_CONTNUM :
174 print_dollarhex (cd, info, fields->f_contnum, 0, pc, length);
175 break;
176 case MT_OPERAND_CR :
177 print_dollarhex (cd, info, fields->f_cr, 0, pc, length);
178 break;
179 case MT_OPERAND_CTXDISP :
180 print_dollarhex (cd, info, fields->f_ctxdisp, 0, pc, length);
181 break;
182 case MT_OPERAND_DUP :
183 print_dollarhex (cd, info, fields->f_dup, 0, pc, length);
184 break;
185 case MT_OPERAND_FBDISP :
186 print_dollarhex (cd, info, fields->f_fbdisp, 0, pc, length);
187 break;
188 case MT_OPERAND_FBINCR :
189 print_dollarhex (cd, info, fields->f_fbincr, 0, pc, length);
190 break;
191 case MT_OPERAND_FRDR :
192 print_keyword (cd, info, & mt_cgen_opval_h_spr, fields->f_dr, 0|(1<<CGEN_OPERAND_ABS_ADDR));
193 break;
194 case MT_OPERAND_FRDRRR :
195 print_keyword (cd, info, & mt_cgen_opval_h_spr, fields->f_drrr, 0|(1<<CGEN_OPERAND_ABS_ADDR));
196 break;
197 case MT_OPERAND_FRSR1 :
198 print_keyword (cd, info, & mt_cgen_opval_h_spr, fields->f_sr1, 0|(1<<CGEN_OPERAND_ABS_ADDR));
199 break;
200 case MT_OPERAND_FRSR2 :
201 print_keyword (cd, info, & mt_cgen_opval_h_spr, fields->f_sr2, 0|(1<<CGEN_OPERAND_ABS_ADDR));
202 break;
203 case MT_OPERAND_ID :
204 print_dollarhex (cd, info, fields->f_id, 0, pc, length);
205 break;
206 case MT_OPERAND_IMM16 :
207 print_dollarhex (cd, info, fields->f_imm16s, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
208 break;
209 case MT_OPERAND_IMM16L :
210 print_dollarhex (cd, info, fields->f_imm16l, 0, pc, length);
211 break;
212 case MT_OPERAND_IMM16O :
213 print_pcrel (cd, info, fields->f_imm16s, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
214 break;
215 case MT_OPERAND_IMM16Z :
216 print_dollarhex (cd, info, fields->f_imm16u, 0, pc, length);
217 break;
218 case MT_OPERAND_INCAMT :
219 print_dollarhex (cd, info, fields->f_incamt, 0, pc, length);
220 break;
221 case MT_OPERAND_INCR :
222 print_dollarhex (cd, info, fields->f_incr, 0, pc, length);
223 break;
224 case MT_OPERAND_LENGTH :
225 print_dollarhex (cd, info, fields->f_length, 0, pc, length);
226 break;
227 case MT_OPERAND_LOOPSIZE :
228 print_pcrel (cd, info, fields->f_loopo, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
229 break;
230 case MT_OPERAND_MASK :
231 print_dollarhex (cd, info, fields->f_mask, 0, pc, length);
232 break;
233 case MT_OPERAND_MASK1 :
234 print_dollarhex (cd, info, fields->f_mask1, 0, pc, length);
235 break;
236 case MT_OPERAND_MODE :
237 print_dollarhex (cd, info, fields->f_mode, 0, pc, length);
238 break;
239 case MT_OPERAND_PERM :
240 print_dollarhex (cd, info, fields->f_perm, 0, pc, length);
241 break;
242 case MT_OPERAND_RBBC :
243 print_dollarhex (cd, info, fields->f_rbbc, 0, pc, length);
244 break;
245 case MT_OPERAND_RC :
246 print_dollarhex (cd, info, fields->f_rc, 0, pc, length);
247 break;
248 case MT_OPERAND_RC1 :
249 print_dollarhex (cd, info, fields->f_rc1, 0, pc, length);
250 break;
251 case MT_OPERAND_RC2 :
252 print_dollarhex (cd, info, fields->f_rc2, 0, pc, length);
253 break;
254 case MT_OPERAND_RC3 :
255 print_dollarhex (cd, info, fields->f_rc3, 0, pc, length);
256 break;
257 case MT_OPERAND_RCNUM :
258 print_dollarhex (cd, info, fields->f_rcnum, 0, pc, length);
259 break;
260 case MT_OPERAND_RDA :
261 print_dollarhex (cd, info, fields->f_rda, 0, pc, length);
262 break;
263 case MT_OPERAND_ROWNUM :
264 print_dollarhex (cd, info, fields->f_rownum, 0, pc, length);
265 break;
266 case MT_OPERAND_ROWNUM1 :
267 print_dollarhex (cd, info, fields->f_rownum1, 0, pc, length);
268 break;
269 case MT_OPERAND_ROWNUM2 :
270 print_dollarhex (cd, info, fields->f_rownum2, 0, pc, length);
271 break;
272 case MT_OPERAND_SIZE :
273 print_dollarhex (cd, info, fields->f_size, 0, pc, length);
274 break;
275 case MT_OPERAND_TYPE :
276 print_dollarhex (cd, info, fields->f_type, 0, pc, length);
277 break;
278 case MT_OPERAND_WR :
279 print_dollarhex (cd, info, fields->f_wr, 0, pc, length);
280 break;
281 case MT_OPERAND_XMODE :
282 print_dollarhex (cd, info, fields->f_xmode, 0, pc, length);
283 break;
284
285 default :
286 /* xgettext:c-format */
287 opcodes_error_handler
288 (_("internal error: unrecognized field %d while printing insn"),
289 opindex);
290 abort ();
291 }
292 }
293
294 cgen_print_fn * const mt_cgen_print_handlers[] =
295 {
296 print_insn_normal,
297 };
298
299
300 void
301 mt_cgen_init_dis (CGEN_CPU_DESC cd)
302 {
303 mt_cgen_init_opcode_table (cd);
304 mt_cgen_init_ibld_table (cd);
305 cd->print_handlers = & mt_cgen_print_handlers[0];
306 cd->print_operand = mt_cgen_print_operand;
307 }
308
309
310 /* Default print handler. */
311
312 static void
313 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
314 void *dis_info,
315 long value,
316 unsigned int attrs,
317 bfd_vma pc ATTRIBUTE_UNUSED,
318 int length ATTRIBUTE_UNUSED)
319 {
320 disassemble_info *info = (disassemble_info *) dis_info;
321
322 /* Print the operand as directed by the attributes. */
323 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
324 ; /* nothing to do */
325 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
326 (*info->fprintf_func) (info->stream, "%ld", value);
327 else
328 (*info->fprintf_func) (info->stream, "0x%lx", value);
329 }
330
331 /* Default address handler. */
332
333 static void
334 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
335 void *dis_info,
336 bfd_vma value,
337 unsigned int attrs,
338 bfd_vma pc ATTRIBUTE_UNUSED,
339 int length ATTRIBUTE_UNUSED)
340 {
341 disassemble_info *info = (disassemble_info *) dis_info;
342
343 /* Print the operand as directed by the attributes. */
344 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
345 ; /* Nothing to do. */
346 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
347 (*info->print_address_func) (value, info);
348 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
349 (*info->print_address_func) (value, info);
350 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
351 (*info->fprintf_func) (info->stream, "%ld", (long) value);
352 else
353 (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
354 }
355
356 /* Keyword print handler. */
357
358 static void
359 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
360 void *dis_info,
361 CGEN_KEYWORD *keyword_table,
362 long value,
363 unsigned int attrs ATTRIBUTE_UNUSED)
364 {
365 disassemble_info *info = (disassemble_info *) dis_info;
366 const CGEN_KEYWORD_ENTRY *ke;
367
368 ke = cgen_keyword_lookup_value (keyword_table, value);
369 if (ke != NULL)
370 (*info->fprintf_func) (info->stream, "%s", ke->name);
371 else
372 (*info->fprintf_func) (info->stream, "???");
373 }
374
375 /* Default insn printer.
376
377 DIS_INFO is defined as `void *' so the disassembler needn't know anything
378 about disassemble_info. */
379
380 static void
381 print_insn_normal (CGEN_CPU_DESC cd,
382 void *dis_info,
383 const CGEN_INSN *insn,
384 CGEN_FIELDS *fields,
385 bfd_vma pc,
386 int length)
387 {
388 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
389 disassemble_info *info = (disassemble_info *) dis_info;
390 const CGEN_SYNTAX_CHAR_TYPE *syn;
391
392 CGEN_INIT_PRINT (cd);
393
394 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
395 {
396 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
397 {
398 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
399 continue;
400 }
401 if (CGEN_SYNTAX_CHAR_P (*syn))
402 {
403 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
404 continue;
405 }
406
407 /* We have an operand. */
408 mt_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
409 fields, CGEN_INSN_ATTRS (insn), pc, length);
410 }
411 }
412
413 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
414 the extract info.
415 Returns 0 if all is well, non-zero otherwise. */
416
417 static int
418 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
419 bfd_vma pc,
420 disassemble_info *info,
421 bfd_byte *buf,
422 int buflen,
423 CGEN_EXTRACT_INFO *ex_info,
424 unsigned long *insn_value)
425 {
426 int status = (*info->read_memory_func) (pc, buf, buflen, info);
427
428 if (status != 0)
429 {
430 (*info->memory_error_func) (status, pc, info);
431 return -1;
432 }
433
434 ex_info->dis_info = info;
435 ex_info->valid = (1 << buflen) - 1;
436 ex_info->insn_bytes = buf;
437
438 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
439 return 0;
440 }
441
442 /* Utility to print an insn.
443 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
444 The result is the size of the insn in bytes or zero for an unknown insn
445 or -1 if an error occurs fetching data (memory_error_func will have
446 been called). */
447
448 static int
449 print_insn (CGEN_CPU_DESC cd,
450 bfd_vma pc,
451 disassemble_info *info,
452 bfd_byte *buf,
453 unsigned int buflen)
454 {
455 CGEN_INSN_INT insn_value;
456 const CGEN_INSN_LIST *insn_list;
457 CGEN_EXTRACT_INFO ex_info;
458 int basesize;
459
460 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
461 basesize = cd->base_insn_bitsize < buflen * 8 ?
462 cd->base_insn_bitsize : buflen * 8;
463 insn_value = cgen_get_insn_value (cd, buf, basesize, cd->insn_endian);
464
465
466 /* Fill in ex_info fields like read_insn would. Don't actually call
467 read_insn, since the incoming buffer is already read (and possibly
468 modified a la m32r). */
469 ex_info.valid = (1 << buflen) - 1;
470 ex_info.dis_info = info;
471 ex_info.insn_bytes = buf;
472
473 /* The instructions are stored in hash lists.
474 Pick the first one and keep trying until we find the right one. */
475
476 insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
477 while (insn_list != NULL)
478 {
479 const CGEN_INSN *insn = insn_list->insn;
480 CGEN_FIELDS fields;
481 int length;
482 unsigned long insn_value_cropped;
483
484 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
485 /* Not needed as insn shouldn't be in hash lists if not supported. */
486 /* Supported by this cpu? */
487 if (! mt_cgen_insn_supported (cd, insn))
488 {
489 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
490 continue;
491 }
492 #endif
493
494 /* Basic bit mask must be correct. */
495 /* ??? May wish to allow target to defer this check until the extract
496 handler. */
497
498 /* Base size may exceed this instruction's size. Extract the
499 relevant part from the buffer. */
500 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
501 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
502 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
503 info->endian == BFD_ENDIAN_BIG);
504 else
505 insn_value_cropped = insn_value;
506
507 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
508 == CGEN_INSN_BASE_VALUE (insn))
509 {
510 /* Printing is handled in two passes. The first pass parses the
511 machine insn and extracts the fields. The second pass prints
512 them. */
513
514 /* Make sure the entire insn is loaded into insn_value, if it
515 can fit. */
516 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
517 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
518 {
519 unsigned long full_insn_value;
520 int rc = read_insn (cd, pc, info, buf,
521 CGEN_INSN_BITSIZE (insn) / 8,
522 & ex_info, & full_insn_value);
523 if (rc != 0)
524 return rc;
525 length = CGEN_EXTRACT_FN (cd, insn)
526 (cd, insn, &ex_info, full_insn_value, &fields, pc);
527 }
528 else
529 length = CGEN_EXTRACT_FN (cd, insn)
530 (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
531
532 /* Length < 0 -> error. */
533 if (length < 0)
534 return length;
535 if (length > 0)
536 {
537 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
538 /* Length is in bits, result is in bytes. */
539 return length / 8;
540 }
541 }
542
543 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
544 }
545
546 return 0;
547 }
548
549 /* Default value for CGEN_PRINT_INSN.
550 The result is the size of the insn in bytes or zero for an unknown insn
551 or -1 if an error occured fetching bytes. */
552
553 #ifndef CGEN_PRINT_INSN
554 #define CGEN_PRINT_INSN default_print_insn
555 #endif
556
557 static int
558 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
559 {
560 bfd_byte buf[CGEN_MAX_INSN_SIZE];
561 int buflen;
562 int status;
563
564 /* Attempt to read the base part of the insn. */
565 buflen = cd->base_insn_bitsize / 8;
566 status = (*info->read_memory_func) (pc, buf, buflen, info);
567
568 /* Try again with the minimum part, if min < base. */
569 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
570 {
571 buflen = cd->min_insn_bitsize / 8;
572 status = (*info->read_memory_func) (pc, buf, buflen, info);
573 }
574
575 if (status != 0)
576 {
577 (*info->memory_error_func) (status, pc, info);
578 return -1;
579 }
580
581 return print_insn (cd, pc, info, buf, buflen);
582 }
583
584 /* Main entry point.
585 Print one instruction from PC on INFO->STREAM.
586 Return the size of the instruction (in bytes). */
587
588 typedef struct cpu_desc_list
589 {
590 struct cpu_desc_list *next;
591 CGEN_BITSET *isa;
592 int mach;
593 int endian;
594 int insn_endian;
595 CGEN_CPU_DESC cd;
596 } cpu_desc_list;
597
598 int
599 print_insn_mt (bfd_vma pc, disassemble_info *info)
600 {
601 static cpu_desc_list *cd_list = 0;
602 cpu_desc_list *cl = 0;
603 static CGEN_CPU_DESC cd = 0;
604 static CGEN_BITSET *prev_isa;
605 static int prev_mach;
606 static int prev_endian;
607 static int prev_insn_endian;
608 int length;
609 CGEN_BITSET *isa;
610 int mach;
611 int endian = (info->endian == BFD_ENDIAN_BIG
612 ? CGEN_ENDIAN_BIG
613 : CGEN_ENDIAN_LITTLE);
614 int insn_endian = (info->endian_code == BFD_ENDIAN_BIG
615 ? CGEN_ENDIAN_BIG
616 : CGEN_ENDIAN_LITTLE);
617 enum bfd_architecture arch;
618
619 /* ??? gdb will set mach but leave the architecture as "unknown" */
620 #ifndef CGEN_BFD_ARCH
621 #define CGEN_BFD_ARCH bfd_arch_mt
622 #endif
623 arch = info->arch;
624 if (arch == bfd_arch_unknown)
625 arch = CGEN_BFD_ARCH;
626
627 /* There's no standard way to compute the machine or isa number
628 so we leave it to the target. */
629 #ifdef CGEN_COMPUTE_MACH
630 mach = CGEN_COMPUTE_MACH (info);
631 #else
632 mach = info->mach;
633 #endif
634
635 #ifdef CGEN_COMPUTE_ISA
636 {
637 static CGEN_BITSET *permanent_isa;
638
639 if (!permanent_isa)
640 permanent_isa = cgen_bitset_create (MAX_ISAS);
641 isa = permanent_isa;
642 cgen_bitset_clear (isa);
643 cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
644 }
645 #else
646 isa = info->private_data;
647 #endif
648
649 /* If we've switched cpu's, try to find a handle we've used before */
650 if (cd
651 && (cgen_bitset_compare (isa, prev_isa) != 0
652 || mach != prev_mach
653 || endian != prev_endian))
654 {
655 cd = 0;
656 for (cl = cd_list; cl; cl = cl->next)
657 {
658 if (cgen_bitset_compare (cl->isa, isa) == 0 &&
659 cl->mach == mach &&
660 cl->endian == endian)
661 {
662 cd = cl->cd;
663 prev_isa = cd->isas;
664 break;
665 }
666 }
667 }
668
669 /* If we haven't initialized yet, initialize the opcode table. */
670 if (! cd)
671 {
672 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
673 const char *mach_name;
674
675 if (!arch_type)
676 abort ();
677 mach_name = arch_type->printable_name;
678
679 prev_isa = cgen_bitset_copy (isa);
680 prev_mach = mach;
681 prev_endian = endian;
682 prev_insn_endian = insn_endian;
683 cd = mt_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
684 CGEN_CPU_OPEN_BFDMACH, mach_name,
685 CGEN_CPU_OPEN_ENDIAN, prev_endian,
686 CGEN_CPU_OPEN_INSN_ENDIAN, prev_insn_endian,
687 CGEN_CPU_OPEN_END);
688 if (!cd)
689 abort ();
690
691 /* Save this away for future reference. */
692 cl = xmalloc (sizeof (struct cpu_desc_list));
693 cl->cd = cd;
694 cl->isa = prev_isa;
695 cl->mach = mach;
696 cl->endian = endian;
697 cl->next = cd_list;
698 cd_list = cl;
699
700 mt_cgen_init_dis (cd);
701 }
702
703 /* We try to have as much common code as possible.
704 But at this point some targets need to take over. */
705 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
706 but if not possible try to move this hook elsewhere rather than
707 have two hooks. */
708 length = CGEN_PRINT_INSN (cd, pc, info);
709 if (length > 0)
710 return length;
711 if (length < 0)
712 return -1;
713
714 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
715 return cd->default_insn_bitsize / 8;
716 }