lxdream 0.9.1| filename | src/aica/armdasm.c |
| changeset | 302:96b5cc24309c |
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| author | nkeynes |
| date | Mon Jan 29 11:24:44 2007 +0000 (17 years ago) |
| permissions | -rw-r--r-- |
| last change | Get render size from the tile segment array Set near clip to just 0 rather than scanning the scene Fixup modulate RGB to force fragment alpha to 1.0 Add some debugging fprintfs |
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1 /**
2 * $Id: armdasm.c,v 1.12 2007-01-17 21:27:20 nkeynes Exp $
3 *
4 * armdasm.c 21 Aug 2004 - ARM7tdmi (ARMv4) disassembler
5 *
6 * Copyright (c) 2005 Nathan Keynes.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
19 #include "aica/armcore.h"
20 #include "aica/armdasm.h"
21 #include <stdlib.h>
23 #define COND(ir) (ir>>28)
24 #define OPCODE(ir) ((ir>>20)&0x1F)
25 #define GRP(ir) ((ir>>26)&0x03)
26 #define IFLAG(ir) (ir&0x02000000)
27 #define SFLAG(ir) (ir&0x00100000)
28 #define PFLAG(ir) (ir&0x01000000)
29 #define UFLAG(ir) (ir&0x00800000)
30 #define BFLAG(ir) (ir&0x00400000)
31 #define WFLAG(ir) (ir&0x00200000)
32 #define LFLAG(ir) SFLAG(ir)
33 #define RN(ir) ((ir>>16)&0x0F)
34 #define RD(ir) ((ir>>12)&0x0F)
35 #define RS(ir) ((ir>>8)&0x0F)
36 #define RM(ir) (ir&0x0F)
38 #define IMM8(ir) (ir&0xFF)
39 #define IMM12(ir) (ir&0xFFF)
40 #define SHIFTIMM(ir) ((ir>>7)&0x1F)
41 #define IMMROT(ir) ((ir>>7)&0x1E)
42 #define SHIFT(ir) ((ir>>4)&0x07)
43 #define DISP24(ir) ((ir&0x00FFFFFF))
44 #define FSXC(ir) msrFieldMask[RN(ir)]
45 #define ROTIMM12(ir) ROTATE_RIGHT_LONG(IMM8(ir),IMMROT(ir))
46 #define SIGNEXT24(n) ((n&0x00800000) ? (n|0xFF000000) : (n&0x00FFFFFF))
50 const struct reg_desc_struct arm_reg_map[] =
51 { {"R0", REG_INT, &armr.r[0]}, {"R1", REG_INT, &armr.r[1]},
52 {"R2", REG_INT, &armr.r[2]}, {"R3", REG_INT, &armr.r[3]},
53 {"R4", REG_INT, &armr.r[4]}, {"R5", REG_INT, &armr.r[5]},
54 {"R6", REG_INT, &armr.r[6]}, {"R7", REG_INT, &armr.r[7]},
55 {"R8", REG_INT, &armr.r[8]}, {"R9", REG_INT, &armr.r[9]},
56 {"R10",REG_INT, &armr.r[10]}, {"R11",REG_INT, &armr.r[11]},
57 {"R12",REG_INT, &armr.r[12]}, {"R13",REG_INT, &armr.r[13]},
58 {"R14",REG_INT, &armr.r[14]}, {"R15",REG_INT, &armr.r[15]},
59 {"CPSR", REG_INT, &armr.cpsr}, {"SPSR", REG_INT, &armr.spsr},
60 {NULL, 0, NULL} };
63 const struct cpu_desc_struct arm_cpu_desc =
64 { "ARM7", arm_disasm_instruction, arm_execute_instruction, arm_has_page,
65 arm_set_breakpoint, arm_clear_breakpoint, arm_get_breakpoint, 4,
66 (char *)&armr, sizeof(armr), arm_reg_map,
67 &armr.r[15] };
68 const struct cpu_desc_struct armt_cpu_desc =
69 { "ARM7T", armt_disasm_instruction, arm_execute_instruction, arm_has_page,
70 arm_set_breakpoint, arm_clear_breakpoint, arm_get_breakpoint, 2,
71 (char*)&armr, sizeof(armr), arm_reg_map,
72 &armr.r[15] };
77 char *conditionNames[] = { "EQ", "NE", "CS", "CC", "MI", "PL", "VS", "VC",
78 "HI", "LS", "GE", "LT", "GT", "LE", " " /*AL*/, "NV" };
80 /* fsxc */
81 char *msrFieldMask[] = { "", "c", "x", "xc", "s", "sc", "sx", "sxc",
82 "f", "fc", "fx", "fxc", "fs", "fsc", "fsx", "fsxc" };
83 char *ldmModes[] = { "DA", "IA", "DB", "IB" };
85 #define UNIMP(ir) snprintf( buf, len, "??? " )
87 int arm_disasm_shift_operand( uint32_t ir, char *buf, int len )
88 {
89 uint32_t operand, tmp;
90 if( IFLAG(ir) == 0 ) {
91 switch(SHIFT(ir)) {
92 case 0: /* (Rm << imm) */
93 tmp = SHIFTIMM(ir);
94 if( tmp != 0 ) {
95 return snprintf(buf, len, "R%d << %d", RM(ir), tmp );
96 } else {
97 return snprintf(buf, len, "R%d", RM(ir));
98 }
99 case 1: /* (Rm << Rs) */
100 return snprintf(buf, len, "R%d << R%d", RM(ir), RS(ir) );
101 case 2: /* (Rm >> imm) */
102 return snprintf(buf, len, "R%d >> %d", RM(ir), SHIFTIMM(ir) );
103 case 3: /* (Rm >> Rs) */
104 return snprintf(buf, len, "R%d >> R%d", RM(ir), RS(ir) );
105 case 4: /* (Rm >>> imm) */
106 return snprintf(buf, len, "R%d >>> %d", RM(ir), SHIFTIMM(ir) );
107 case 5: /* (Rm >>> Rs) */
108 return snprintf(buf, len, "R%d >>> R%d", RM(ir), RS(ir) );
109 case 6:
110 tmp = SHIFTIMM(ir);
111 if( tmp == 0 ) /* RRX aka rotate with carry */
112 return snprintf(buf, len, "R%d roc 1", RM(ir) );
113 else
114 return snprintf(buf, len, "R%d rot %d", RM(ir), SHIFTIMM(ir) );
115 case 7:
116 return snprintf(buf, len, "R%d rot R%d", RM(ir), RS(ir) );
117 }
118 } else {
119 operand = IMM8(ir);
120 tmp = IMMROT(ir);
121 operand = ROTATE_RIGHT_LONG(operand, tmp);
122 return snprintf(buf, len, "#%08Xh", operand );
123 }
124 }
126 static int arm_disasm_address_index( uint32_t ir, char *buf, int len )
127 {
128 uint32_t tmp;
130 switch(SHIFT(ir)) {
131 case 0: /* (Rm << imm) */
132 tmp = SHIFTIMM(ir);
133 if( tmp != 0 ) {
134 return snprintf( buf, len, "R%d << %d", RM(ir), tmp );
135 } else {
136 return snprintf( buf, len, "R%d", RM(ir) );
137 }
138 case 2: /* (Rm >> imm) */
139 return snprintf( buf, len, "R%d >> %d", RM(ir), SHIFTIMM(ir) );
140 case 4: /* (Rm >>> imm) */
141 return snprintf( buf, len, "R%d >>> %d", RM(ir), SHIFTIMM(ir) );
142 case 6:
143 tmp = SHIFTIMM(ir);
144 if( tmp == 0 ) /* RRX aka rotate with carry */
145 return snprintf( buf, len, "R%d roc 1", RM(ir) );
146 else
147 return snprintf( buf, len, "R%d rot %d", RM(ir), tmp );
148 default:
149 return UNIMP(ir);
150 }
151 }
153 static int arm_disasm_address_operand( uint32_t ir, char *buf, int len, int pc )
154 {
155 char shift[32];
157 char sign = UFLAG(ir) ? '+' : '-';
158 /* I P U . W */
159 switch( (ir>>21)&0x19 ) {
160 case 0: /* Rn -= imm offset (post-indexed) [5.2.8 A5-28] */
161 case 1:
162 return snprintf( buf, len, "[R%d], R%d %c= #%04Xh", RN(ir), RN(ir), sign, IMM12(ir) );
163 case 8: /* Rn - imm offset [5.2.2 A5-20] */
164 if( RN(ir) == 15 ) { /* PC relative - decode here */
165 uint32_t addr = pc + 8 + (UFLAG(ir) ? IMM12(ir) : -IMM12(ir));
166 return snprintf( buf, len, "[$%08Xh] <- #%08Xh", addr,
167 arm_read_long( addr ) );
168 } else {
169 return snprintf( buf, len, "[R%d %c #%04Xh]", RN(ir), sign, IMM12(ir) );
170 }
171 case 9: /* Rn -= imm offset (pre-indexed) [5.2.5 A5-24] */
172 return snprintf( buf, len, "[R%d %c= #%04Xh]", RN(ir), sign, IMM12(ir) );
173 case 16: /* Rn -= Rm (post-indexed) [5.2.10 A5-32 ] */
174 case 17:
175 arm_disasm_address_index( ir, shift, sizeof(shift) );
176 return snprintf( buf, len, "[R%d], R%d %c= %s", RN(ir), RN(ir), sign, shift );
177 case 24: /* Rn - Rm [5.2.4 A5-23] */
178 arm_disasm_address_index( ir, shift, sizeof(shift) );
179 return snprintf( buf, len, "[R%d %c %s]", RN(ir), sign, shift );
180 case 25: /* RN -= Rm (pre-indexed) [5.2.7 A5-26] */
181 arm_disasm_address_index( ir, shift, sizeof(shift) );
182 return snprintf( buf, len, "[R%d %c= %s]", RN(ir), sign, shift );
183 default:
184 return UNIMP(ir); /* Unreachable */
185 }
186 }
188 uint32_t arm_disasm_instruction( uint32_t pc, char *buf, int len, char *opcode )
189 {
190 char operand[64];
191 uint32_t ir = arm_read_long(pc);
192 int i,j;
194 sprintf( opcode, "%02X %02X %02X %02X", ir&0xFF, (ir>>8) & 0xFF,
195 (ir>>16)&0xFF, (ir>>24) );
197 if( COND(ir) == 0x0F ) {
198 UNIMP(ir);
199 return pc+4;
200 }
201 char *cond = conditionNames[COND(ir)];
203 switch( GRP(ir) ) {
204 case 0:
205 if( (ir & 0x0D900000) == 0x01000000 ) {
206 /* Instructions that aren't actual data processing */
207 switch( ir & 0x0FF000F0 ) {
208 case 0x01200010: /* BXcc */
209 snprintf(buf, len, "BX%s R%d", cond, RM(ir));
210 break;
211 case 0x01000000: /* MRS Rd, CPSR */
212 snprintf(buf, len, "MRS%s R%d, CPSR", cond, RD(ir));
213 break;
214 case 0x01400000: /* MRS Rd, SPSR */
215 snprintf(buf, len, "MRS%s R%d, SPSR", cond, RD(ir));
216 break;
217 case 0x01200000: /* MSR CPSR, Rm */
218 snprintf(buf, len, "MSR%s CPSR_%s, R%d", cond, FSXC(ir), RM(ir));
219 break;
220 case 0x01600000: /* MSR SPSR, Rm */
221 snprintf(buf, len, "MSR%s SPSR_%s, R%d", cond, FSXC(ir), RM(ir));
222 break;
223 case 0x03200000: /* MSR CPSR, imm */
224 snprintf(buf, len, "MSR%s CPSR_%s, #%08X", cond, FSXC(ir), ROTIMM12(ir));
225 break;
226 case 0x03600000: /* MSR SPSR, imm */
227 snprintf(buf, len, "MSR%s SPSR_%s, #%08X", cond, FSXC(ir), ROTIMM12(ir));
228 break;
229 default:
230 UNIMP();
231 }
232 } else if( (ir & 0x0E000090) == 0x00000090 ) {
233 /* Neither are these */
234 switch( (ir>>5)&0x03 ) {
235 case 0:
236 /* Arithmetic extension area */
237 switch(OPCODE(ir)) {
238 case 0: /* MUL */
239 snprintf(buf,len, "MUL%s R%d, R%d, R%d", cond, RN(ir), RM(ir), RS(ir) );
240 break;
241 case 1: /* MULS */
242 break;
243 case 2: /* MLA */
244 snprintf(buf,len, "MLA%s R%d, R%d, R%d, R%d", cond, RN(ir), RM(ir), RS(ir), RD(ir) );
245 break;
246 case 3: /* MLAS */
247 break;
248 case 8: /* UMULL */
249 snprintf(buf,len, "UMULL%s R%d, R%d, R%d, R%d", cond, RD(ir), RN(ir), RM(ir), RS(ir) );
250 break;
251 case 9: /* UMULLS */
252 break;
253 case 10: /* UMLAL */
254 snprintf(buf,len, "UMLAL%s R%d, R%d, R%d, R%d", cond, RD(ir), RN(ir), RM(ir), RS(ir) );
255 break;
256 case 11: /* UMLALS */
257 break;
258 case 12: /* SMULL */
259 snprintf(buf,len, "SMULL%s R%d, R%d, R%d, R%d", cond, RD(ir), RN(ir), RM(ir), RS(ir) );
260 break;
261 case 13: /* SMULLS */
262 break;
263 case 14: /* SMLAL */
264 snprintf(buf,len, "SMLAL%s R%d, R%d, R%d, R%d", cond, RD(ir), RN(ir), RM(ir), RS(ir) );
265 break;
266 case 15: /* SMLALS */
268 break;
269 case 16: /* SWP */
270 snprintf(buf,len, "SWP%s R%d, R%d, [R%d]", cond, RD(ir), RN(ir), RM(ir) );
271 break;
272 case 20: /* SWPB */
273 snprintf(buf,len, "SWPB%s R%d, R%d, [R%d]", cond, RD(ir), RN(ir), RM(ir) );
274 break;
275 default:
276 UNIMP(ir);
277 }
278 break;
279 case 1:
280 if( LFLAG(ir) ) {
281 /* LDRH */
282 } else {
283 /* STRH */
284 }
285 UNIMP(ir);
286 break;
287 case 2:
288 if( LFLAG(ir) ) {
289 /* LDRSB */
290 } else {
291 }
292 UNIMP(ir);
293 break;
294 case 3:
295 if( LFLAG(ir) ) {
296 /* LDRSH */
297 } else {
298 }
299 UNIMP(ir);
300 break;
301 }
302 } else {
303 /* Data processing */
305 switch(OPCODE(ir)) {
306 case 0: /* AND Rd, Rn, operand */
307 arm_disasm_shift_operand(ir, operand, sizeof(operand));
308 snprintf(buf, len, "AND%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
309 break;
310 case 1: /* ANDS Rd, Rn, operand */
311 arm_disasm_shift_operand(ir, operand, sizeof(operand));
312 snprintf(buf, len, "ANDS%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
313 break;
314 case 2: /* EOR Rd, Rn, operand */
315 arm_disasm_shift_operand(ir, operand, sizeof(operand));
316 snprintf(buf, len, "EOR%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
317 break;
318 case 3: /* EORS Rd, Rn, operand */
319 arm_disasm_shift_operand(ir, operand, sizeof(operand));
320 snprintf(buf, len, "EORS%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
321 break;
322 case 4: /* SUB Rd, Rn, operand */
323 arm_disasm_shift_operand(ir, operand, sizeof(operand));
324 snprintf(buf, len, "SUB%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
325 break;
326 case 5: /* SUBS Rd, Rn, operand */
327 arm_disasm_shift_operand(ir, operand, sizeof(operand));
328 snprintf(buf, len, "SUBS%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
329 break;
330 case 6: /* RSB Rd, Rn, operand */
331 arm_disasm_shift_operand(ir, operand, sizeof(operand));
332 snprintf(buf, len, "RSB%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
333 break;
334 case 7: /* RSBS Rd, Rn, operand */
335 arm_disasm_shift_operand(ir, operand, sizeof(operand));
336 snprintf(buf, len, "RSBS%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
337 break;
338 case 8: /* ADD Rd, Rn, operand */
339 arm_disasm_shift_operand(ir, operand, sizeof(operand));
340 snprintf(buf, len, "ADD%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
341 break;
342 case 9: /* ADDS Rd, Rn, operand */
343 arm_disasm_shift_operand(ir, operand, sizeof(operand));
344 snprintf(buf, len, "ADDS%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
345 break;
346 case 10: /* ADC Rd, Rn, operand */
347 arm_disasm_shift_operand(ir, operand, sizeof(operand));
348 snprintf(buf, len, "ADC%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
349 break;
350 case 11: /* ADCS Rd, Rn, operand */
351 arm_disasm_shift_operand(ir, operand, sizeof(operand));
352 snprintf(buf, len, "ADCS%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
353 break;
354 case 12: /* SBC Rd, Rn, operand */
355 arm_disasm_shift_operand(ir, operand, sizeof(operand));
356 snprintf(buf, len, "SBC%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
357 break;
358 case 13: /* SBCS Rd, Rn, operand */
359 arm_disasm_shift_operand(ir, operand, sizeof(operand));
360 snprintf(buf, len, "SBCS%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
361 break;
362 case 14: /* RSC Rd, Rn, operand */
363 arm_disasm_shift_operand(ir, operand, sizeof(operand));
364 snprintf(buf, len, "RSC%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
365 break;
366 case 15: /* RSCS Rd, Rn, operand */
367 arm_disasm_shift_operand(ir, operand, sizeof(operand));
368 snprintf(buf, len, "RSCS%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
369 break;
370 case 17: /* TST Rd, Rn, operand */
371 arm_disasm_shift_operand(ir, operand, sizeof(operand));
372 snprintf(buf, len, "TST%s R%d, %s", cond, RN(ir), operand);
373 break;
374 case 19: /* TEQ Rd, Rn, operand */
375 arm_disasm_shift_operand(ir, operand, sizeof(operand));
376 snprintf(buf, len, "TEQ%s R%d, %s", cond, RN(ir), operand);
377 break;
378 case 21: /* CMP Rd, Rn, operand */
379 arm_disasm_shift_operand(ir, operand, sizeof(operand));
380 snprintf(buf, len, "CMP%s R%d, %s", cond, RN(ir), operand);
381 break;
382 case 23: /* CMN Rd, Rn, operand */
383 arm_disasm_shift_operand(ir, operand, sizeof(operand));
384 snprintf(buf, len, "CMN%s R%d, %s", cond, RN(ir), operand);
385 break;
386 case 24: /* ORR Rd, Rn, operand */
387 arm_disasm_shift_operand(ir, operand, sizeof(operand));
388 snprintf(buf, len, "ORR%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
389 break;
390 case 25: /* ORRS Rd, Rn, operand */
391 arm_disasm_shift_operand(ir, operand, sizeof(operand));
392 snprintf(buf, len, "ORRS%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
393 break;
394 case 26: /* MOV Rd, operand */
395 if( ir == 0xE1A00000 ) {
396 /* Not technically a different instruction,
397 * but this one is commonly used as a NOP,
398 * so...
399 */
400 snprintf(buf, len, "NOP");
401 } else {
402 arm_disasm_shift_operand(ir, operand, sizeof(operand));
403 snprintf(buf, len, "MOV%s R%d, %s", cond, RD(ir), operand);
404 }
405 break;
406 case 27: /* MOVS Rd, operand */
407 arm_disasm_shift_operand(ir, operand, sizeof(operand));
408 snprintf(buf, len, "MOVS%s R%d, %s", cond, RD(ir), operand);
409 break;
410 case 28: /* BIC Rd, Rn, operand */
411 arm_disasm_shift_operand(ir, operand, sizeof(operand));
412 snprintf(buf, len, "BIC%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
413 break;
414 case 29: /* BICS Rd, Rn, operand */
415 arm_disasm_shift_operand(ir, operand, sizeof(operand));
416 snprintf(buf, len, "BICS%s R%d, R%d, %s", cond, RD(ir), RN(ir), operand);
417 break;
418 case 30: /* MVN Rd, Rn, operand */
419 arm_disasm_shift_operand(ir, operand, sizeof(operand));
420 snprintf(buf, len, "MVN%s R%d, %s", cond, RD(ir), operand);
421 break;
422 case 31: /* MVNS Rd, Rn, operand */
423 arm_disasm_shift_operand(ir, operand, sizeof(operand));
424 snprintf(buf, len, "MVNS%s R%d, %s", cond, RD(ir), operand);
425 break;
426 default:
427 UNIMP(ir);
428 }
429 }
430 break;
431 case 1: /* Load/store */
432 arm_disasm_address_operand( ir, operand, sizeof(operand), pc );
433 switch( (ir>>20)&0x17 ) {
434 case 0:
435 case 16:
436 case 18:
437 snprintf(buf, len, "STR%s R%d, %s", cond, RD(ir), operand );
438 break;
439 case 1:
440 case 17:
441 case 19:
442 snprintf(buf, len, "LDR%s R%d, %s", cond, RD(ir), operand );
443 break;
444 case 2:
445 snprintf(buf, len, "STRT%s R%d, %s", cond, RD(ir), operand );
446 break;
447 case 3:
448 snprintf(buf, len, "LDRT%s R%d, %s", cond, RD(ir), operand );
449 break;
450 case 4:
451 case 20:
452 case 22:
453 snprintf(buf, len, "STRB%s R%d, %s", cond, RD(ir), operand );
454 break;
455 case 5:
456 case 21:
457 case 23:
458 snprintf(buf, len, "LDRB%s R%d, %s", cond, RD(ir), operand );
459 break;
460 case 6:
461 snprintf(buf, len, "STRBT%s R%d, %s", cond, RD(ir), operand );
462 break;
463 case 7:
464 snprintf(buf, len, "LDRBT%s R%d, %s", cond, RD(ir), operand );
465 break;
466 }
467 break;
468 case 2:
469 if( (ir & 0x02000000) == 0x02000000 ) {
470 int32_t offset = SIGNEXT24(ir&0x00FFFFFF) << 2;
471 if( (ir & 0x01000000) == 0x01000000 ) {
472 snprintf( buf, len, "BL%s $%08Xh", cond, pc + offset + 8 );
473 } else {
474 snprintf( buf, len, "B%s $%08Xh", cond, pc + offset + 8 );
475 }
476 } else {
477 /* Load/store multiple */
478 j = snprintf( buf, len, LFLAG(ir) ? "LDM%s%s R%d%c,":"STM%s%s R%d%c,",
479 ldmModes[(ir>>23)&0x03], cond, RN(ir), WFLAG(ir)?'!':' ' );
480 buf += j;
481 len -= j;
482 for( i = 0; i<16 && len > 2; i++ ) {
483 if( ir & (1<<i) ) {
484 j = snprintf( buf, len, "R%d", i );
485 buf+=j;
486 len-=j;
487 }
488 }
489 if( BFLAG(ir) && len > 0 ) {
490 buf[0] = '^';
491 buf[1] = '\0';
492 }
493 }
494 break;
495 case 3: /* Copro */
496 if( (ir & 0x0F000000) == 0x0F000000 ) {
497 snprintf( buf, len, "SWI%s #%08Xh", cond, SIGNEXT24(ir) );
498 } else {
499 UNIMP(ir);
500 }
501 break;
502 }
506 return pc+4;
507 }
510 uint32_t armt_disasm_instruction( uint32_t pc, char *buf, int len, char *opcode )
511 {
512 uint32_t ir = arm_read_word(pc);
513 sprintf( opcode, "%02X %02X", ir&0xFF, (ir>>8) );
514 UNIMP(ir);
515 return pc+2;
516 }
.