notaz.gp2x.de / picodrive.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
libretro: update for core changes
[picodrive.git] / cpu / sh2 / mame / sh2dasm.c
CommitLineData
679af8a3 1#include <stdio.h>\r
2#include "sh2dasm.h"\r
3\r
4typedef int INT32;\r
5typedef unsigned int UINT32;\r
6typedef unsigned short UINT16;\r
7typedef unsigned char UINT8;\r
8\r
9#define DASMFLAG_STEP_OUT 0\r
10#define DASMFLAG_STEP_OVER 0\r
11#define DASMFLAG_STEP_OVER_EXTRA(x) 0\r
12\r
13#define SIGNX8(x) (((INT32)(x) << 24) >> 24)\r
14#define SIGNX12(x) (((INT32)(x) << 20) >> 20)\r
15\r
16#define Rn ((opcode >> 8) & 15)\r
17#define Rm ((opcode >> 4) & 15)\r
18\r
19static const char *const regname[16] = {\r
20 "R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7",\r
21 "R8", "R9", "R10","R11","R12","R13","R14","SP"\r
22};\r
23\r
24static UINT32 op0000(char *buffer, UINT32 pc, UINT16 opcode)\r
25{\r
26 UINT32 flags = 0;\r
27 switch(opcode & 0x3f)\r
28 {\r
29 case 0x02:\r
30 sprintf(buffer,"STC SR,%s", regname[Rn]);\r
31 break;\r
32 case 0x03:\r
33 sprintf(buffer,"BSRF %s", regname[Rn]);\r
34 break;\r
35 case 0x08:\r
36 sprintf(buffer,"CLRT");\r
37 break;\r
38 case 0x09:\r
39 sprintf(buffer,"NOP");\r
40 break;\r
41 case 0x0A:\r
42 sprintf(buffer,"STS MACH,%s", regname[Rn]);\r
43 break;\r
44 case 0x0B:\r
45 sprintf(buffer,"RTS");\r
46 flags = DASMFLAG_STEP_OUT;\r
47 break;\r
48 case 0x12:\r
49 sprintf(buffer,"STS GBR,%s", regname[Rn]);\r
50 break;\r
51 case 0x18:\r
52 sprintf(buffer,"SETT");\r
53 break;\r
54 case 0x19:\r
55 sprintf(buffer,"DIV0U");\r
56 break;\r
57 case 0x1A:\r
58 sprintf(buffer,"STS MACL,%s", regname[Rn]);\r
59 break;\r
60 case 0x1B:\r
61 sprintf(buffer,"SLEEP");\r
62 break;\r
63 case 0x22:\r
64 sprintf(buffer,"STC VBR,%s", regname[Rn]);\r
65 break;\r
66 case 0x23:\r
67 sprintf(buffer,"BRAF %s", regname[Rn]);\r
68 break;\r
69 case 0x28:\r
70 sprintf(buffer,"CLRMAC");\r
71 break;\r
72 case 0x29:\r
73 sprintf(buffer,"MOVT %s", regname[Rn]);\r
74 break;\r
75 case 0x2A:\r
76 sprintf(buffer,"STS PR,%s", regname[Rn]);\r
77 break;\r
78 case 0x2B:\r
79 sprintf(buffer,"RTE");\r
80 flags = DASMFLAG_STEP_OUT;\r
81 break;\r
82 default:\r
83 switch(opcode & 15)\r
84 {\r
85 case 0:\r
86 sprintf(buffer, "?????? $%04X", opcode);\r
87 break;\r
88 case 1:\r
89 sprintf(buffer, "?????? $%04X", opcode);\r
90 break;\r
91 case 2:\r
92 sprintf(buffer, "?????? $%04X", opcode);\r
93 break;\r
94 case 3:\r
95 sprintf(buffer, "?????? $%04X", opcode);\r
96 break;\r
97 case 4:\r
98 sprintf(buffer, "MOV.B %s,@(R0,%s)", regname[Rm], regname[Rn]);\r
99 break;\r
100 case 5:\r
101 sprintf(buffer, "MOV.W %s,@(R0,%s)", regname[Rm], regname[Rn]);\r
102 break;\r
103 case 6:\r
104 sprintf(buffer, "MOV.L %s,@(R0,%s)", regname[Rm], regname[Rn]);\r
105 break;\r
106 case 7:\r
107 sprintf(buffer, "MUL.L %s,%s", regname[Rm], regname[Rn]);\r
108 break;\r
109 case 8:\r
110 sprintf(buffer, "?????? $%04X", opcode);\r
111 break;\r
112 case 9:\r
113 sprintf(buffer, "?????? $%04X", opcode);\r
114 break;\r
115 case 10:\r
116 sprintf(buffer, "?????? $%04X", opcode);\r
117 break;\r
118 case 11:\r
119 sprintf(buffer, "?????? $%04X", opcode);\r
120 break;\r
121 case 12:\r
122 sprintf(buffer, "MOV.B @(R0,%s),%s", regname[Rm], regname[Rn]);\r
123 break;\r
124 case 13:\r
125 sprintf(buffer, "MOV.W @(R0,%s),%s", regname[Rm], regname[Rn]);\r
126 break;\r
127 case 14:\r
128 sprintf(buffer, "MOV.L @(R0,%s),%s", regname[Rm], regname[Rn]);\r
129 break;\r
130 case 15:\r
131 sprintf(buffer, "MAC.L @%s+,@%s+", regname[Rn], regname[Rm]);\r
132 break;\r
133 }\r
134 }\r
135 return flags;\r
136}\r
137\r
138static UINT32 op0001(char *buffer, UINT32 pc, UINT16 opcode)\r
139{\r
140 sprintf(buffer, "MOV.L %s,@($%02X,%s)", regname[Rm], (opcode & 15) * 4, regname[Rn]);\r
141 return 0;\r
142}\r
143\r
144static UINT32 op0010(char *buffer, UINT32 pc, UINT16 opcode)\r
145{\r
146 switch (opcode & 15)\r
147 {\r
148 case 0:\r
149 sprintf(buffer, "MOV.B %s,@%s", regname[Rm], regname[Rn]);\r
150 break;\r
151 case 1:\r
152 sprintf(buffer, "MOV.W %s,@%s", regname[Rm], regname[Rn]);\r
153 break;\r
154 case 2:\r
155 sprintf(buffer, "MOV.L %s,@%s", regname[Rm], regname[Rn]);\r
156 break;\r
157 case 3:\r
158 sprintf(buffer, "?????? $%04X", opcode);\r
159 break;\r
160 case 4:\r
161 sprintf(buffer, "MOV.B %s,@-%s", regname[Rm], regname[Rn]);\r
162 break;\r
163 case 5:\r
164 sprintf(buffer, "MOV.W %s,@-%s", regname[Rm], regname[Rn]);\r
165 break;\r
166 case 6:\r
167 sprintf(buffer, "MOV.L %s,@-%s", regname[Rm], regname[Rn]);\r
168 break;\r
169 case 7:\r
170 sprintf(buffer, "DIV0S %s,%s", regname[Rm], regname[Rn]);\r
171 break;\r
172 case 8:\r
173 sprintf(buffer, "TST %s,%s", regname[Rm], regname[Rn]);\r
174 break;\r
175 case 9:\r
176 sprintf(buffer, "AND %s,%s", regname[Rm], regname[Rn]);\r
177 break;\r
178 case 10:\r
179 sprintf(buffer, "XOR %s,%s", regname[Rm], regname[Rn]);\r
180 break;\r
181 case 11:\r
182 sprintf(buffer, "OR %s,%s", regname[Rm], regname[Rn]);\r
183 break;\r
184 case 12:\r
185 sprintf(buffer, "CMP/STR %s,%s", regname[Rm], regname[Rn]);\r
186 break;\r
187 case 13:\r
188 sprintf(buffer, "XTRCT %s,%s", regname[Rm], regname[Rn]);\r
189 break;\r
190 case 14:\r
191 sprintf(buffer, "MULU.W %s,%s", regname[Rm], regname[Rn]);\r
192 break;\r
193 case 15:\r
194 sprintf(buffer, "MULS.W %s,%s", regname[Rm], regname[Rn]);\r
195 break;\r
196 }\r
197 return 0;\r
198}\r
199\r
200static UINT32 op0011(char *buffer, UINT32 pc, UINT16 opcode)\r
201{\r
202 switch (opcode & 15)\r
203 {\r
204 case 0:\r
205 sprintf(buffer, "CMP/EQ %s,%s", regname[Rm], regname[Rn]);\r
206 break;\r
207 case 1:\r
208 sprintf(buffer, "?????? %s,%s", regname[Rm], regname[Rn]);\r
209 break;\r
210 case 2:\r
211 sprintf(buffer, "CMP/HS %s,%s", regname[Rm], regname[Rn]);\r
212 break;\r
213 case 3:\r
214 sprintf(buffer, "CMP/GE %s,%s", regname[Rm], regname[Rn]);\r
215 break;\r
216 case 4:\r
217 sprintf(buffer, "DIV1 %s,%s", regname[Rm], regname[Rn]);\r
218 break;\r
219 case 5:\r
220 sprintf(buffer, "DMULU.L %s,%s", regname[Rm], regname[Rn]);\r
221 break;\r
222 case 6:\r
223 sprintf(buffer, "CMP/HI %s,%s", regname[Rm], regname[Rn]);\r
224 break;\r
225 case 7:\r
226 sprintf(buffer, "CMP/GT %s,%s", regname[Rm], regname[Rn]);\r
227 break;\r
228 case 8:\r
229 sprintf(buffer, "SUB %s,%s", regname[Rm], regname[Rn]);\r
230 break;\r
231 case 9:\r
232 sprintf(buffer, "?????? %s,%s", regname[Rm], regname[Rn]);\r
233 break;\r
234 case 10:\r
235 sprintf(buffer, "SUBC %s,%s", regname[Rm], regname[Rn]);\r
236 break;\r
237 case 11:\r
238 sprintf(buffer, "SUBV %s,%s", regname[Rm], regname[Rn]);\r
239 break;\r
240 case 12:\r
241 sprintf(buffer, "ADD %s,%s", regname[Rm], regname[Rn]);\r
242 break;\r
243 case 13:\r
244 sprintf(buffer, "DMULS.L %s,%s", regname[Rm], regname[Rn]);\r
245 break;\r
246 case 14:\r
247 sprintf(buffer, "ADDC %s,%s", regname[Rm], regname[Rn]);\r
248 break;\r
249 case 15:\r
250 sprintf(buffer, "ADDV %s,%s", regname[Rm], regname[Rn]);\r
251 break;\r
252 }\r
253 return 0;\r
254}\r
255\r
256static UINT32 op0100(char *buffer, UINT32 pc, UINT16 opcode)\r
257{\r
258 UINT32 flags = 0;\r
259 switch(opcode & 0x3F)\r
260 {\r
261 case 0x00:\r
262 sprintf(buffer, "SHLL %s", regname[Rn]);\r
263 break;\r
264 case 0x01:\r
265 sprintf(buffer, "SHLR %s", regname[Rn]);\r
266 break;\r
267 case 0x02:\r
268 sprintf(buffer, "STS.L MACH,@-%s", regname[Rn]);\r
269 break;\r
270 case 0x03:\r
271 sprintf(buffer, "STC.L SR,@-%s", regname[Rn]);\r
272 break;\r
273 case 0x04:\r
274 sprintf(buffer, "ROTL %s", regname[Rn]);\r
275 break;\r
276 case 0x05:\r
277 sprintf(buffer, "ROTR %s", regname[Rn]);\r
278 break;\r
279 case 0x06:\r
280 sprintf(buffer, "LDS.L @%s+,MACH", regname[Rn]);\r
281 break;\r
282 case 0x07:\r
283 sprintf(buffer, "LDC.L @%s+,SR", regname[Rn]);\r
284 break;\r
285 case 0x08:\r
286 sprintf(buffer, "SHLL2 %s", regname[Rn]);\r
287 break;\r
288 case 0x09:\r
289 sprintf(buffer, "SHLR2 %s", regname[Rn]);\r
290 break;\r
291 case 0x0a:\r
292 sprintf(buffer, "LDS %s,MACH", regname[Rn]);\r
293 break;\r
294 case 0x0b:\r
295 sprintf(buffer, "JSR %s", regname[Rn]);\r
296 flags = DASMFLAG_STEP_OVER | DASMFLAG_STEP_OVER_EXTRA(1);\r
297 break;\r
298 case 0x0e:\r
299 sprintf(buffer, "LDC %s,SR", regname[Rn]);\r
300 break;\r
301 case 0x10:\r
302 sprintf(buffer, "DT %s", regname[Rn]);\r
303 break;\r
304 case 0x11:\r
305 sprintf(buffer, "CMP/PZ %s", regname[Rn]);\r
306 break;\r
307 case 0x12:\r
308 sprintf(buffer, "STS.L MACL,@-%s", regname[Rn]);\r
309 break;\r
310 case 0x13:\r
311 sprintf(buffer, "STC.L GBR,@-%s", regname[Rn]);\r
312 break;\r
313 case 0x15:\r
314 sprintf(buffer, "CMP/PL %s", regname[Rn]);\r
315 break;\r
316 case 0x16:\r
317 sprintf(buffer, "LDS.L @%s+,MACL", regname[Rn]);\r
318 break;\r
319 case 0x17:\r
320 sprintf(buffer, "LDC.L @%s+,GBR", regname[Rn]);\r
321 break;\r
322 case 0x18:\r
323 sprintf(buffer, "SHLL8 %s", regname[Rn]);\r
324 break;\r
325 case 0x19:\r
326 sprintf(buffer, "SHLR8 %s", regname[Rn]);\r
327 break;\r
328 case 0x1a:\r
329 sprintf(buffer, "LDS %s,MACL", regname[Rn]);\r
330 break;\r
331 case 0x1b:\r
332 sprintf(buffer, "TAS %s", regname[Rn]);\r
333 break;\r
334 case 0x1e:\r
335 sprintf(buffer, "LDC %s,GBR", regname[Rn]);\r
336 break;\r
337 case 0x20:\r
338 sprintf(buffer, "SHAL %s", regname[Rn]);\r
339 break;\r
340 case 0x21:\r
341 sprintf(buffer, "SHAR %s", regname[Rn]);\r
342 break;\r
343 case 0x22:\r
344 sprintf(buffer, "STS.L PR,@-%s", regname[Rn]);\r
345 break;\r
346 case 0x23:\r
347 sprintf(buffer, "STC.L VBR,@-%s", regname[Rn]);\r
348 break;\r
349 case 0x24:\r
350 sprintf(buffer, "ROTCL %s", regname[Rn]);\r
351 break;\r
352 case 0x25:\r
353 sprintf(buffer, "ROTCR %s", regname[Rn]);\r
354 break;\r
355 case 0x26:\r
356 sprintf(buffer, "LDS.L @%s+,PR", regname[Rn]);\r
357 break;\r
358 case 0x27:\r
359 sprintf(buffer, "LDC.L @%s+,VBR", regname[Rn]);\r
360 break;\r
361 case 0x28:\r
362 sprintf(buffer, "SHLL16 %s", regname[Rn]);\r
363 break;\r
364 case 0x29:\r
365 sprintf(buffer, "SHLR16 %s", regname[Rn]);\r
366 break;\r
367 case 0x2a:\r
368 sprintf(buffer, "LDS %s,PR", regname[Rn]);\r
369 break;\r
370 case 0x2b:\r
371 sprintf(buffer, "JMP %s", regname[Rn]);\r
372 break;\r
373 case 0x2e:\r
374 sprintf(buffer, "LDC %s,VBR", regname[Rn]);\r
375 break;\r
376 default:\r
377 if ((opcode & 15) == 15)\r
378 sprintf(buffer, "MAC.W @%s+,@%s+", regname[Rm], regname[Rn]);\r
379 else\r
380 sprintf(buffer, "?????? $%04X", opcode);\r
381 }\r
382 return flags;\r
383}\r
384\r
385static UINT32 op0101(char *buffer, UINT32 pc, UINT16 opcode)\r
386{\r
387 sprintf(buffer, "MOV.L @($%02X,%s),%s", (opcode & 15) * 4, regname[Rm], regname[Rn]);\r
388 return 0;\r
389}\r
390\r
391static UINT32 op0110(char *buffer, UINT32 pc, UINT16 opcode)\r
392\r
393{\r
394 switch(opcode & 0xF)\r
395 {\r
396 case 0x00:\r
397 sprintf(buffer, "MOV.B @%s,%s", regname[Rm], regname[Rn]);\r
398 break;\r
399 case 0x01:\r
400 sprintf(buffer, "MOV.W @%s,%s", regname[Rm], regname[Rn]);\r
401 break;\r
402 case 0x02:\r
403 sprintf(buffer, "MOV.L @%s,%s", regname[Rm], regname[Rn]);\r
404 break;\r
405 case 0x03:\r
406 sprintf(buffer, "MOV %s,%s", regname[Rm], regname[Rn]);\r
407 break;\r
408 case 0x04:\r
409 sprintf(buffer, "MOV.B @%s+,%s", regname[Rm], regname[Rn]);\r
410 break;\r
411 case 0x05:\r
412 sprintf(buffer, "MOV.W @%s+,%s", regname[Rm], regname[Rn]);\r
413 break;\r
414 case 0x06:\r
415 sprintf(buffer, "MOV.L @%s+,%s", regname[Rm], regname[Rn]);\r
416 break;\r
417 case 0x07:\r
418 sprintf(buffer, "NOT %s,%s", regname[Rm], regname[Rn]);\r
419 break;\r
420 case 0x08:\r
421 sprintf(buffer, "SWAP.B %s,%s", regname[Rm], regname[Rn]);\r
422 break;\r
423 case 0x09:\r
424 sprintf(buffer, "SWAP.W %s,%s", regname[Rm], regname[Rn]);\r
425 break;\r
426 case 0x0a:\r
427 sprintf(buffer, "NEGC %s,%s", regname[Rm], regname[Rn]);\r
428 break;\r
429 case 0x0b:\r
430 sprintf(buffer, "NEG %s,%s", regname[Rm], regname[Rn]);\r
431 break;\r
432 case 0x0c:\r
433 sprintf(buffer, "EXTU.B %s,%s", regname[Rm], regname[Rn]);\r
434 break;\r
435 case 0x0d:\r
436 sprintf(buffer, "EXTU.W %s,%s", regname[Rm], regname[Rn]);\r
437 break;\r
438 case 0x0e:\r
439 sprintf(buffer, "EXTS.B %s,%s", regname[Rm], regname[Rn]);\r
440 break;\r
441 case 0x0f:\r
442 sprintf(buffer, "EXTS.W %s,%s", regname[Rm], regname[Rn]);\r
443 break;\r
444 }\r
445 return 0;\r
446}\r
447\r
448static UINT32 op0111(char *buffer, UINT32 pc, UINT16 opcode)\r
449{\r
450 sprintf(buffer, "ADD #$%02X,%s", opcode & 0xff, regname[Rn]);\r
451 return 0;\r
452}\r
453\r
454static UINT32 op1000(char *buffer, UINT32 pc, UINT16 opcode)\r
455{\r
456 switch((opcode >> 8) & 15)\r
457 {\r
458 case 0:\r
459 sprintf(buffer, "MOV.B R0,@($%02X,%s)", (opcode & 15), regname[Rm]);\r
460 break;\r
461 case 1:\r
462 sprintf(buffer, "MOV.W R0,@($%02X,%s)", (opcode & 15) * 2, regname[Rm]);\r
463 break;\r
464 case 4:\r
465 sprintf(buffer, "MOV.B @($%02X,%s),R0", (opcode & 15), regname[Rm]);\r
466 break;\r
467 case 5:\r
468 sprintf(buffer, "MOV.W @($%02X,%s),R0", (opcode & 15), regname[Rm]);\r
469 break;\r
470 case 8:\r
471 sprintf(buffer, "CMP/EQ #$%02X,R0", (opcode & 0xff));\r
472 break;\r
473 case 9:\r
e85944cc 474 sprintf(buffer, "BT $%08x", pc + SIGNX8(opcode & 0xff) * 2 + 2);\r
679af8a3 475 break;\r
476 case 11:\r
e85944cc 477 sprintf(buffer, "BF $%08x", pc + SIGNX8(opcode & 0xff) * 2 + 2);\r
679af8a3 478 break;\r
479 case 13:\r
e85944cc 480 sprintf(buffer, "BTS $%08x", pc + SIGNX8(opcode & 0xff) * 2 + 2);\r
679af8a3 481 break;\r
482 case 15:\r
e85944cc 483 sprintf(buffer, "BFS $%08x", pc + SIGNX8(opcode & 0xff) * 2 + 2);\r
679af8a3 484 break;\r
485 default :\r
486 sprintf(buffer, "invalid $%04X", opcode);\r
487 }\r
488 return 0;\r
489}\r
490\r
491static UINT32 op1001(char *buffer, UINT32 pc, UINT16 opcode)\r
492{\r
23686515 493 sprintf(buffer, "MOV.W @($%02X,PC),%s ; @$%08x", (opcode & 0xff) * 2, regname[Rn],\r
494 pc + (opcode & 0xff) * 2 + 2);\r
679af8a3 495 return 0;\r
496}\r
497\r
498static UINT32 op1010(char *buffer, UINT32 pc, UINT16 opcode)\r
499{\r
e85944cc 500 sprintf(buffer, "BRA $%08x", SIGNX12(opcode & 0xfff) * 2 + pc + 2);\r
679af8a3 501 return 0;\r
502}\r
503\r
504static UINT32 op1011(char *buffer, UINT32 pc, UINT16 opcode)\r
505{\r
e85944cc 506 sprintf(buffer, "BSR $%08x", SIGNX12(opcode & 0xfff) * 2 + pc + 2);\r
679af8a3 507 return DASMFLAG_STEP_OVER | DASMFLAG_STEP_OVER_EXTRA(1);\r
508}\r
509\r
510static UINT32 op1100(char *buffer, UINT32 pc, UINT16 opcode)\r
511{\r
512 UINT32 flags = 0;\r
513 switch((opcode >> 8) & 15)\r
514 {\r
515 case 0:\r
516 sprintf(buffer, "MOV.B R0,@($%02X,GBR)", opcode & 0xff);\r
517 break;\r
518 case 1:\r
519 sprintf(buffer, "MOV.W R0,@($%04X,GBR)", (opcode & 0xff) * 2);\r
520 break;\r
521 case 2:\r
522 sprintf(buffer, "MOV.L R0,@($%04X,GBR)", (opcode & 0xff) * 4);\r
523 break;\r
524 case 3:\r
525 sprintf(buffer, "TRAPA #$%02X", opcode & 0xff);\r
526 flags = DASMFLAG_STEP_OVER;\r
527 break;\r
528 case 4:\r
529 sprintf(buffer, "MOV.B @($%02X,GBR),R0", opcode & 0xff);\r
530 break;\r
531 case 5:\r
532 sprintf(buffer, "MOV.W @($%04X,GBR),R0", (opcode & 0xff) * 2);\r
533 break;\r
534 case 6:\r
535 sprintf(buffer, "MOV.L @($%04X,GBR),R0", (opcode & 0xff) * 4);\r
536 break;\r
537 case 7:\r
04092e32 538 sprintf(buffer, "MOVA @($%04X,PC),R0 ; @$%08x", (opcode & 0xff) * 4,\r
539 ((pc + 2) & ~3) + (opcode & 0xff) * 4);\r
679af8a3 540 break;\r
541 case 8:\r
542 sprintf(buffer, "TST #$%02X,R0", opcode & 0xff);\r
543 break;\r
544 case 9:\r
545 sprintf(buffer, "AND #$%02X,R0", opcode & 0xff);\r
546 break;\r
547 case 10:\r
548 sprintf(buffer, "XOR #$%02X,R0", opcode & 0xff);\r
549 break;\r
550 case 11:\r
551 sprintf(buffer, "OR #$%02X,R0", opcode & 0xff);\r
552 break;\r
553 case 12:\r
554 sprintf(buffer, "TST.B #$%02X,@(R0,GBR)", opcode & 0xff);\r
555 break;\r
556 case 13:\r
557 sprintf(buffer, "AND.B #$%02X,@(R0,GBR)", opcode & 0xff);\r
558 break;\r
559 case 14:\r
560 sprintf(buffer, "XOR.B #$%02X,@(R0,GBR)", opcode & 0xff);\r
561 break;\r
562 case 15:\r
563 sprintf(buffer, "OR.B #$%02X,@(R0,GBR)", opcode & 0xff);\r
564 break;\r
565 }\r
566 return flags;\r
567}\r
568\r
569static UINT32 op1101(char *buffer, UINT32 pc, UINT16 opcode)\r
570{\r
23686515 571 sprintf(buffer, "MOV.L @($%02X,PC),%s ; @$%08x", (opcode & 0xff) * 4, regname[Rn],\r
572 (pc + (opcode & 0xff) * 4 + 2) & ~3);\r
679af8a3 573 return 0;\r
574}\r
575\r
576static UINT32 op1110(char *buffer, UINT32 pc, UINT16 opcode)\r
577{\r
578 sprintf(buffer, "MOV #$%02X,%s", (opcode & 0xff), regname[Rn]);\r
579 return 0;\r
580}\r
581\r
582static UINT32 op1111(char *buffer, UINT32 pc, UINT16 opcode)\r
583{\r
584 sprintf(buffer, "unknown $%04X", opcode);\r
585 return 0;\r
586}\r
587\r
588unsigned DasmSH2(char *buffer, unsigned pc, UINT16 opcode)\r
589{\r
590 UINT32 flags;\r
591\r
592 pc += 2;\r
593\r
594 switch((opcode >> 12) & 15)\r
595 {\r
596 case 0: flags = op0000(buffer,pc,opcode); break;\r
597 case 1: flags = op0001(buffer,pc,opcode); break;\r
598 case 2: flags = op0010(buffer,pc,opcode); break;\r
599 case 3: flags = op0011(buffer,pc,opcode); break;\r
600 case 4: flags = op0100(buffer,pc,opcode); break;\r
601 case 5: flags = op0101(buffer,pc,opcode); break;\r
602 case 6: flags = op0110(buffer,pc,opcode); break;\r
603 case 7: flags = op0111(buffer,pc,opcode); break;\r
604 case 8: flags = op1000(buffer,pc,opcode); break;\r
605 case 9: flags = op1001(buffer,pc,opcode); break;\r
606 case 10: flags = op1010(buffer,pc,opcode); break;\r
607 case 11: flags = op1011(buffer,pc,opcode); break;\r
608 case 12: flags = op1100(buffer,pc,opcode); break;\r
609 case 13: flags = op1101(buffer,pc,opcode); break;\r
610 case 14: flags = op1110(buffer,pc,opcode); break;\r
611 default: flags = op1111(buffer,pc,opcode); break;\r
612 }\r
613 return 0;//2 | flags | DASMFLAG_SUPPORTED;\r
614}\r
615\r
616#if 0\r
617\r
618#define swab32(x) (((x) << 24) | (((x) << 8) & 0xff0000) | (((x) >> 8) & 0xff00) | ((x) >> 24))\r
619#define swab16(x) ((((x) << 8) & 0xff00) | (((x) >> 8) & 0x00ff))\r
620\r
621int main(int argc, char *argv[])\r
622{\r
623 unsigned short op;\r
624 char buff[256];\r
625 unsigned pc;\r
626 FILE *f;\r
627 int ret;\r
628\r
629 if (argv[1] == NULL) {\r
630 printf("usage\n%s <file>\n", argv[0]);\r
631 return 1;\r
632 }\r
633\r
634 f = fopen(argv[1], "rb");\r
635 if (f == NULL) {\r
636 fprintf(stderr, "can't open %s\n", argv[1]);\r
637 return 1;\r
638 }\r
639\r
640 for (pc = 0x140;; pc += 2)\r
641 {\r
642 fseek(f, pc, SEEK_SET);\r
643\r
644 ret = fread(&op, 1, sizeof(op), f);\r
645 if (ret != sizeof(op))\r
646 break;\r
647\r
648 DasmSH2(buff, pc, swab16(op));\r
649 printf("%06x %04x %s\n", pc, swab16(op), buff);\r
650 }\r
651\r
652 fclose(f);\r
653 return 0;\r
654}\r
655\r
656#endif\r
fast MegaDrive/MegaCD/32X emulator