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5c84d377 TW |
1 | /* Disassembly routines for TMS320C54X architecture |
2 | Copyright (C) 1999,2000 Free Software Foundation, Inc. | |
3 | Contributed by Timothy Wall (twall@cygnus.com) | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
18 | 02111-1307, USA. */ | |
19 | ||
20 | #include <errno.h> | |
21 | #include <math.h> | |
22 | #include <stdlib.h> | |
c1485d85 | 23 | #include "sysdep.h" |
5c84d377 TW |
24 | #include "dis-asm.h" |
25 | #include "opcode/tic54x.h" | |
26 | #include "coff/tic54x.h" | |
27 | ||
28 | typedef struct _instruction { | |
29 | int parallel; | |
30 | template *tm; | |
31 | partemplate *ptm; | |
32 | } instruction; | |
33 | ||
34 | static int get_insn_size PARAMS ((unsigned short, instruction *)); | |
35 | static int get_instruction PARAMS ((disassemble_info *, bfd_vma, | |
36 | unsigned short, instruction *)); | |
37 | static int print_instruction PARAMS ((disassemble_info *, bfd_vma, | |
38 | unsigned short, char *, | |
39 | enum optype [], int, int)); | |
40 | static int print_parallel_instruction PARAMS ((disassemble_info *, bfd_vma, | |
41 | unsigned short, partemplate *, | |
42 | int)); | |
43 | static int sprint_dual_address (disassemble_info *,char [], | |
44 | unsigned short); | |
45 | static int sprint_indirect_address (disassemble_info *,char [], | |
46 | unsigned short); | |
47 | static int sprint_direct_address (disassemble_info *,char [], | |
48 | unsigned short); | |
49 | static int sprint_mmr (disassemble_info *,char [],int); | |
50 | static int sprint_condition (disassemble_info *,char *,unsigned short); | |
51 | static int sprint_cc2 (disassemble_info *,char *,unsigned short); | |
52 | ||
53 | int | |
54 | print_insn_tic54x(memaddr, info) | |
55 | bfd_vma memaddr; | |
56 | disassemble_info *info; | |
57 | { | |
58 | bfd_byte opbuf[2]; | |
59 | unsigned short opcode; | |
60 | int status, size; | |
61 | instruction insn; | |
62 | ||
63 | status = (*info->read_memory_func) (memaddr, opbuf, 2, info); | |
64 | if (status != 0) | |
65 | { | |
66 | (*info->memory_error_func)(status, memaddr, info); | |
67 | return -1; | |
68 | } | |
69 | ||
70 | opcode = bfd_getl16(opbuf); | |
71 | if (!get_instruction (info, memaddr, opcode, &insn)) | |
72 | return -1; | |
73 | ||
74 | size = get_insn_size (opcode, &insn); | |
75 | info->bytes_per_line = 2; | |
76 | info->bytes_per_chunk = 2; | |
77 | info->octets_per_byte = 2; | |
78 | info->display_endian = BFD_ENDIAN_LITTLE; | |
79 | ||
80 | if (insn.parallel) | |
81 | { | |
82 | if (!print_parallel_instruction (info, memaddr, opcode, insn.ptm, size)) | |
83 | return -1; | |
84 | } | |
85 | else | |
86 | { | |
87 | if (!print_instruction (info, memaddr, opcode, | |
88 | (char *)insn.tm->name, | |
89 | insn.tm->operand_types, | |
90 | size, (insn.tm->flags & FL_EXT))) | |
91 | return -1; | |
92 | } | |
93 | ||
94 | return size*2; | |
95 | } | |
96 | ||
97 | static int | |
98 | has_lkaddr(opcode, tm) | |
99 | unsigned short opcode; | |
100 | template *tm; | |
101 | { | |
102 | return IS_LKADDR(opcode) && | |
103 | (OPTYPE(tm->operand_types[0]) == OP_Smem || | |
104 | OPTYPE(tm->operand_types[1]) == OP_Smem || | |
105 | OPTYPE(tm->operand_types[2]) == OP_Smem || | |
106 | OPTYPE(tm->operand_types[1]) == OP_Sind); | |
107 | } | |
108 | ||
109 | /* always returns 1 (whether an insn template was found) since we provide an | |
110 | "unknown instruction" template */ | |
111 | static int | |
112 | get_instruction (info, addr, opcode, insn) | |
113 | disassemble_info *info; | |
114 | bfd_vma addr; | |
115 | unsigned short opcode; | |
116 | instruction *insn; | |
117 | { | |
118 | template * tm; | |
119 | partemplate * ptm; | |
120 | ||
121 | insn->parallel = 0; | |
122 | for (tm = (template *)tic54x_optab; tm->name; tm++) | |
123 | { | |
124 | if (tm->opcode == (opcode & tm->mask)) | |
125 | { | |
126 | /* a few opcodes span two words */ | |
127 | if (tm->flags & FL_EXT) | |
128 | { | |
129 | /* if lk addressing is used, the second half of the opcode gets | |
130 | pushed one word later */ | |
131 | bfd_byte opbuf[2]; | |
132 | bfd_vma addr2 = addr + 1 + has_lkaddr(opcode, tm); | |
133 | int status = (*info->read_memory_func)(addr2, opbuf, 2, info); | |
134 | if (status == 0) | |
135 | { | |
136 | unsigned short opcode2 = bfd_getl16(opbuf); | |
137 | if (tm->opcode2 == (opcode2 & tm->mask2)) | |
138 | { | |
139 | insn->tm = tm; | |
140 | return 1; | |
141 | } | |
142 | } | |
143 | } | |
144 | else | |
145 | { | |
146 | insn->tm = tm; | |
147 | return 1; | |
148 | } | |
149 | } | |
150 | } | |
151 | for (ptm = (partemplate *)tic54x_paroptab; ptm->name; ptm++) | |
152 | { | |
153 | if (ptm->opcode == (opcode & ptm->mask)) | |
154 | { | |
155 | insn->parallel = 1; | |
156 | insn->ptm = ptm; | |
157 | return 1; | |
158 | } | |
159 | } | |
160 | ||
161 | insn->tm = (template *)&tic54x_unknown_opcode; | |
162 | return 1; | |
163 | } | |
164 | ||
165 | static int | |
166 | get_insn_size (opcode, insn) | |
167 | unsigned short opcode; | |
168 | instruction *insn; | |
169 | { | |
170 | int size; | |
171 | ||
172 | if (insn->parallel) | |
173 | { | |
174 | /* only non-parallel instructions support lk addressing */ | |
175 | size = insn->ptm->words; | |
176 | } | |
177 | else | |
178 | { | |
179 | size = insn->tm->words + has_lkaddr(opcode, insn->tm); | |
180 | } | |
181 | ||
182 | return size; | |
183 | } | |
184 | ||
185 | int | |
186 | print_instruction (info, memaddr, opcode, tm_name, tm_operands, size, ext) | |
187 | disassemble_info *info; | |
188 | bfd_vma memaddr; | |
189 | unsigned short opcode; | |
190 | char *tm_name; | |
191 | enum optype tm_operands[]; | |
192 | int size; | |
193 | int ext; | |
194 | { | |
195 | static int n; | |
196 | /* string storage for multiple operands */ | |
197 | char operand[4][64] = { {0},{0},{0},{0}, }; | |
198 | bfd_byte buf[2]; | |
199 | unsigned long opcode2, lkaddr; | |
200 | enum optype src = OP_None; | |
201 | enum optype dst = OP_None; | |
202 | int i, shift; | |
203 | char *comma = ""; | |
204 | ||
205 | info->fprintf_func (info->stream, "%-7s", tm_name); | |
206 | ||
207 | if (size > 1) | |
208 | { | |
209 | int status = (*info->read_memory_func) (memaddr+1, buf, 2, info); | |
210 | if (status != 0) | |
211 | return 0; | |
212 | lkaddr = opcode2 = bfd_getl16(buf); | |
213 | if (size > 2) | |
214 | { | |
215 | status = (*info->read_memory_func) (memaddr+2, buf, 2, info); | |
216 | if (status != 0) | |
217 | return 0; | |
218 | opcode2 = bfd_getl16(buf); | |
219 | } | |
220 | } | |
221 | ||
222 | for (i=0;i < MAX_OPERANDS && OPTYPE(tm_operands[i]) != OP_None;i++) | |
223 | { | |
224 | char *next_comma = ","; | |
225 | int optional = (tm_operands[i] & OPT) != 0; | |
226 | ||
227 | switch (OPTYPE(tm_operands[i])) | |
228 | { | |
229 | case OP_Xmem: | |
230 | sprint_dual_address (info, operand[i], XMEM(opcode)); | |
231 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
232 | break; | |
233 | case OP_Ymem: | |
234 | sprint_dual_address (info, operand[i], YMEM(opcode)); | |
235 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
236 | break; | |
237 | case OP_Smem: | |
238 | case OP_Sind: | |
239 | case OP_Lmem: | |
240 | info->fprintf_func (info->stream, "%s", comma); | |
241 | if (INDIRECT(opcode)) | |
242 | { | |
243 | if (MOD(opcode) >= 12) | |
244 | { | |
245 | bfd_vma addr = lkaddr; | |
246 | int arf = ARF(opcode); | |
247 | int mod = MOD(opcode); | |
248 | if (mod == 15) | |
249 | info->fprintf_func (info->stream, "*("); | |
250 | else | |
251 | info->fprintf_func (info->stream, "*%sar%d(", | |
252 | (mod == 13 || mod == 14 ? "+" : ""), | |
253 | arf); | |
254 | (*(info->print_address_func))((bfd_vma)addr, info); | |
255 | info->fprintf_func (info->stream, ")%s", | |
256 | mod == 14 ? "%" : ""); | |
257 | } | |
258 | else | |
259 | { | |
260 | sprint_indirect_address (info, operand[i], opcode); | |
261 | info->fprintf_func (info->stream, "%s", operand[i]); | |
262 | } | |
263 | } | |
264 | else | |
265 | { | |
266 | /* FIXME -- use labels (print_address_func) */ | |
267 | /* in order to do this, we need to guess what DP is */ | |
268 | sprint_direct_address (info, operand[i], opcode); | |
269 | info->fprintf_func (info->stream, "%s", operand[i]); | |
270 | } | |
271 | break; | |
272 | case OP_dmad: | |
273 | info->fprintf_func (info->stream, "%s", comma); | |
274 | (*(info->print_address_func))((bfd_vma)opcode2, info); | |
275 | break; | |
276 | case OP_xpmad: | |
277 | /* upper 7 bits of address are in the opcode */ | |
278 | opcode2 += ((unsigned long)opcode & 0x7F) << 16; | |
279 | /* fall through */ | |
280 | case OP_pmad: | |
281 | info->fprintf_func (info->stream, "%s", comma); | |
282 | (*(info->print_address_func))((bfd_vma)opcode2, info); | |
283 | break; | |
284 | case OP_MMRX: | |
285 | sprint_mmr (info, operand[i], MMRX(opcode)); | |
286 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
287 | break; | |
288 | case OP_MMRY: | |
289 | sprint_mmr (info, operand[i], MMRY(opcode)); | |
290 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
291 | break; | |
292 | case OP_MMR: | |
293 | sprint_mmr (info, operand[i], MMR(opcode)); | |
294 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
295 | break; | |
296 | case OP_PA: | |
297 | sprintf (operand[i], "pa%d", (unsigned)opcode2); | |
298 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
299 | break; | |
300 | case OP_SRC: | |
301 | src = SRC(ext ? opcode2 : opcode) ? OP_B : OP_A; | |
302 | sprintf (operand[i], (src == OP_B) ? "b" : "a"); | |
303 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
304 | break; | |
305 | case OP_SRC1: | |
306 | src = SRC1(ext ? opcode2 : opcode) ? OP_B : OP_A; | |
307 | sprintf (operand[i], (src == OP_B) ? "b" : "a"); | |
308 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
309 | break; | |
310 | case OP_RND: | |
311 | dst = DST(opcode) ? OP_B : OP_A; | |
312 | sprintf (operand[i], (dst == OP_B) ? "a" : "b"); | |
313 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
314 | break; | |
315 | case OP_DST: | |
316 | dst = DST(ext ? opcode2 : opcode) ? OP_B : OP_A; | |
317 | if (!optional || dst != src) | |
318 | { | |
319 | sprintf (operand[i], (dst == OP_B) ? "b" : "a"); | |
320 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
321 | } | |
322 | else | |
323 | next_comma = comma; | |
324 | break; | |
325 | case OP_B: | |
326 | sprintf (operand[i], "b"); | |
327 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
328 | break; | |
329 | case OP_A: | |
330 | sprintf (operand[i], "a"); | |
331 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
332 | break; | |
333 | case OP_ARX: | |
334 | sprintf (operand[i],"ar%d", (int)ARX(opcode)); | |
335 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
336 | break; | |
337 | case OP_SHIFT: | |
338 | shift = SHIFT(ext ? opcode2 : opcode); | |
339 | if (!optional || shift != 0) | |
340 | { | |
341 | sprintf (operand[i],"%d", shift); | |
342 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
343 | } | |
344 | else | |
345 | next_comma = comma; | |
346 | break; | |
347 | case OP_SHFT: | |
348 | shift = SHFT(opcode); | |
349 | if (!optional || shift != 0) | |
350 | { | |
351 | sprintf (operand[i],"%d", (unsigned)shift); | |
352 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
353 | } | |
354 | else | |
355 | next_comma = comma; | |
356 | break; | |
357 | case OP_lk: | |
358 | sprintf (operand[i],"#%d", (int)(short)opcode2); | |
359 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
360 | break; | |
361 | case OP_T: | |
362 | sprintf (operand[i], "t"); | |
363 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
364 | break; | |
365 | case OP_TS: | |
366 | sprintf (operand[i], "ts"); | |
367 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
368 | break; | |
369 | case OP_k8: | |
370 | sprintf (operand[i], "%d", (int)((signed char)(opcode & 0xFF))); | |
371 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
372 | break; | |
373 | case OP_16: | |
374 | sprintf (operand[i], "16"); | |
375 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
376 | break; | |
377 | case OP_ASM: | |
378 | sprintf (operand[i], "asm"); | |
379 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
380 | break; | |
381 | case OP_BITC: | |
382 | sprintf (operand[i], "%d", (int)(opcode & 0xF)); | |
383 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
384 | break; | |
385 | case OP_CC: | |
386 | /* put all CC operands in the same operand */ | |
387 | sprint_condition (info, operand[i], opcode); | |
388 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
389 | i = MAX_OPERANDS; | |
390 | break; | |
391 | case OP_CC2: | |
392 | sprint_cc2 (info, operand[i], opcode); | |
393 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
394 | break; | |
395 | case OP_CC3: | |
396 | { | |
397 | const char *code[] = { "eq", "lt", "gt", "neq" }; | |
398 | sprintf (operand[i], code[CC3(opcode)]); | |
399 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
400 | break; | |
401 | } | |
402 | case OP_123: | |
403 | { | |
404 | int code = (opcode>>8) & 0x3; | |
405 | sprintf (operand[i], "%d", (code == 0) ? 1 : (code == 2) ? 2 : 3); | |
406 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
407 | break; | |
408 | } | |
409 | case OP_k5: | |
410 | sprintf (operand[i], "#%d", | |
411 | (int)(((signed char)opcode & 0x1F) << 3)>>3); | |
412 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
413 | break; | |
414 | case OP_k8u: | |
415 | sprintf (operand[i], "#%d", (unsigned)(opcode & 0xFF)); | |
416 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
417 | break; | |
418 | case OP_k3: | |
419 | sprintf (operand[i], "#%d", (int)(opcode & 0x7)); | |
420 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
421 | break; | |
422 | case OP_lku: | |
423 | sprintf (operand[i], "#%d", (unsigned)opcode2); | |
424 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
425 | break; | |
426 | case OP_N: | |
427 | n = (opcode >> 9) & 0x1; | |
428 | sprintf (operand[i], "st%d", n); | |
429 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
430 | break; | |
431 | case OP_SBIT: | |
432 | { | |
433 | const char *status0[] = { | |
434 | "0", "1", "2", "3", "4", "5", "6", "7", "8", | |
435 | "ovb", "ova", "c", "tc", "13", "14", "15" | |
436 | }; | |
437 | const char *status1[] = { | |
438 | "0", "1", "2", "3", "4", | |
439 | "cmpt", "frct", "c16", "sxm", "ovm", "10", | |
440 | "intm", "hm", "xf", "cpl", "braf" | |
441 | }; | |
442 | sprintf (operand[i], "%s", | |
443 | n ? status1[SBIT(opcode)] : status0[SBIT(opcode)]); | |
444 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
445 | break; | |
446 | } | |
447 | case OP_12: | |
448 | sprintf (operand[i], "%d", (int)((opcode >> 9)&1) + 1); | |
449 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
450 | break; | |
451 | case OP_TRN: | |
452 | sprintf (operand[i], "trn"); | |
453 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
454 | break; | |
455 | case OP_DP: | |
456 | sprintf (operand[i], "dp"); | |
457 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
458 | break; | |
459 | case OP_k9: | |
460 | /* FIXME-- this is DP, print the original address? */ | |
461 | sprintf (operand[i], "#%d", (int)(opcode & 0x1FF)); | |
462 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
463 | break; | |
464 | case OP_ARP: | |
465 | sprintf (operand[i], "arp"); | |
466 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
467 | break; | |
468 | case OP_031: | |
469 | sprintf (operand[i], "%d", (int)(opcode & 0x1F)); | |
470 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
471 | break; | |
472 | default: | |
473 | sprintf (operand[i], "??? (0x%x)", tm_operands[i]); | |
474 | info->fprintf_func (info->stream, "%s%s", comma, operand[i]); | |
475 | break; | |
476 | } | |
477 | comma = next_comma; | |
478 | } | |
479 | return 1; | |
480 | } | |
481 | ||
482 | static int | |
483 | print_parallel_instruction (info, memaddr, opcode, ptm, size) | |
484 | disassemble_info *info; | |
485 | bfd_vma memaddr; | |
486 | unsigned short opcode; | |
487 | partemplate *ptm; | |
488 | int size; | |
489 | { | |
490 | print_instruction (info, memaddr, opcode, | |
491 | ptm->name, ptm->operand_types, size, 0); | |
492 | info->fprintf_func (info->stream, " || "); | |
493 | return print_instruction (info, memaddr, opcode, | |
494 | ptm->parname, ptm->paroperand_types, size, 0); | |
495 | } | |
496 | ||
497 | static int | |
498 | sprint_dual_address (info, buf, code) | |
499 | disassemble_info *info; | |
500 | char buf[]; | |
501 | unsigned short code; | |
502 | { | |
503 | const char *formats[] = { | |
504 | "*ar%d", | |
505 | "*ar%d-", | |
506 | "*ar%d+", | |
507 | "*ar%d+0%%", | |
508 | }; | |
509 | return sprintf (buf, formats[XMOD(code)], XARX(code)); | |
510 | } | |
511 | ||
512 | static int | |
513 | sprint_indirect_address (info, buf, opcode) | |
514 | disassemble_info *info; | |
515 | char buf[]; | |
516 | unsigned short opcode; | |
517 | { | |
518 | const char *formats[] = { | |
519 | "*ar%d", | |
520 | "*ar%d-", | |
521 | "*ar%d+", | |
522 | "*+ar%d", | |
523 | "*ar%d-0B", | |
524 | "*ar%d-0", | |
525 | "*ar%d+0", | |
526 | "*ar%d+0B", | |
527 | "*ar%d-%%", | |
528 | "*ar%d-0%%", | |
529 | "*ar%d+%%", | |
530 | "*ar%d+0%%", | |
531 | }; | |
532 | return sprintf (buf, formats[MOD(opcode)], ARF(opcode)); | |
533 | } | |
534 | ||
535 | static int | |
536 | sprint_direct_address (info, buf, opcode) | |
537 | disassemble_info *info; | |
538 | char buf[]; | |
539 | unsigned short opcode; | |
540 | { | |
541 | /* FIXME -- look up relocation if available */ | |
542 | return sprintf (buf, "0x??%02x", (int)(opcode & 0x7F)); | |
543 | } | |
544 | ||
545 | static int | |
546 | sprint_mmr (info, buf, mmr) | |
547 | disassemble_info *info; | |
548 | char buf[]; | |
549 | int mmr; | |
550 | { | |
551 | symbol *reg = (symbol *)mmregs; | |
552 | while (reg->name != NULL) | |
553 | { | |
554 | if (mmr == reg->value) | |
555 | { | |
556 | sprintf (buf, "%s", (reg+1)->name); | |
557 | return 1; | |
558 | } | |
559 | ++reg; | |
560 | } | |
561 | sprintf (buf, "MMR(%d)", mmr); // FIXME -- different targets | |
562 | return 0; | |
563 | } | |
564 | ||
565 | static int | |
566 | sprint_cc2 (info, buf, opcode) | |
567 | disassemble_info *info; | |
568 | char *buf; | |
569 | unsigned short opcode; | |
570 | { | |
571 | const char *cc2[] = { | |
572 | "??", "??", "ageq", "alt", "aneq", "aeq", "agt", "aleq", | |
573 | "??", "??", "bgeq", "blt", "bneq", "beq", "bgt", "bleq", | |
574 | }; | |
575 | return sprintf (buf, "%s", cc2[opcode & 0xF]); | |
576 | } | |
577 | ||
578 | static int | |
579 | sprint_condition (info, buf, opcode) | |
580 | disassemble_info *info; | |
581 | char *buf; | |
582 | unsigned short opcode; | |
583 | { | |
584 | char *start = buf; | |
585 | const char *cmp[] = { | |
586 | "??", "??", "geq", "lt", "neq", "eq", "gt", "leq" | |
587 | }; | |
588 | if (opcode & 0x40) | |
589 | { | |
590 | char acc = (opcode & 0x8) ? 'b' : 'a'; | |
591 | if (opcode & 0x7) | |
592 | buf += sprintf (buf, "%c%s%s", acc, cmp[(opcode&0x7)], | |
593 | (opcode&0x20) ? ", " : ""); | |
594 | if (opcode & 0x20) | |
595 | buf += sprintf (buf, "%c%s", acc, (opcode&0x10) ? "ov" : "nov"); | |
596 | } | |
597 | else if (opcode & 0x3F) | |
598 | { | |
599 | if (opcode & 0x30) | |
600 | buf += sprintf (buf, "%s%s", | |
601 | ((opcode & 0x30) == 0x30) ? "tc" : "ntc", | |
602 | (opcode & 0x0F) ? ", " : ""); | |
603 | if (opcode & 0x0C) | |
604 | buf += sprintf (buf, "%s%s", | |
605 | ((opcode & 0x0C) == 0x0C) ? "c" : "nc", | |
606 | (opcode & 0x03) ? ", " : ""); | |
607 | if (opcode & 0x03) | |
608 | buf += sprintf (buf, "%s", | |
609 | ((opcode & 0x03) == 0x03) ? "bio" : "nbio"); | |
610 | } | |
611 | else | |
612 | buf += sprintf (buf, "unc"); | |
613 | ||
614 | return buf - start; | |
615 | } |