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c906108c SS |
1 | /* armemu.c -- Main instruction emulation: ARM7 Instruction Emulator. |
2 | Copyright (C) 1994 Advanced RISC Machines Ltd. | |
3 | Modifications to add arch. v4 support by <jsmith@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 02111-1307, USA. */ | |
18 | ||
19 | #include "armdefs.h" | |
20 | #include "armemu.h" | |
7a292a7a | 21 | #include "armos.h" |
c906108c | 22 | |
dfcd3bfb JM |
23 | static ARMword GetDPRegRHS (ARMul_State * state, ARMword instr); |
24 | static ARMword GetDPSRegRHS (ARMul_State * state, ARMword instr); | |
25 | static void WriteR15 (ARMul_State * state, ARMword src); | |
26 | static void WriteSR15 (ARMul_State * state, ARMword src); | |
892c6b9d | 27 | static void WriteR15Branch (ARMul_State * state, ARMword src); |
dfcd3bfb JM |
28 | static ARMword GetLSRegRHS (ARMul_State * state, ARMword instr); |
29 | static ARMword GetLS7RHS (ARMul_State * state, ARMword instr); | |
30 | static unsigned LoadWord (ARMul_State * state, ARMword instr, | |
31 | ARMword address); | |
32 | static unsigned LoadHalfWord (ARMul_State * state, ARMword instr, | |
33 | ARMword address, int signextend); | |
34 | static unsigned LoadByte (ARMul_State * state, ARMword instr, ARMword address, | |
35 | int signextend); | |
36 | static unsigned StoreWord (ARMul_State * state, ARMword instr, | |
37 | ARMword address); | |
38 | static unsigned StoreHalfWord (ARMul_State * state, ARMword instr, | |
39 | ARMword address); | |
40 | static unsigned StoreByte (ARMul_State * state, ARMword instr, | |
41 | ARMword address); | |
42 | static void LoadMult (ARMul_State * state, ARMword address, ARMword instr, | |
43 | ARMword WBBase); | |
44 | static void StoreMult (ARMul_State * state, ARMword address, ARMword instr, | |
45 | ARMword WBBase); | |
46 | static void LoadSMult (ARMul_State * state, ARMword address, ARMword instr, | |
47 | ARMword WBBase); | |
48 | static void StoreSMult (ARMul_State * state, ARMword address, ARMword instr, | |
49 | ARMword WBBase); | |
50 | static unsigned Multiply64 (ARMul_State * state, ARMword instr, | |
51 | int signextend, int scc); | |
52 | static unsigned MultiplyAdd64 (ARMul_State * state, ARMword instr, | |
53 | int signextend, int scc); | |
54 | ||
55 | #define LUNSIGNED (0) /* unsigned operation */ | |
56 | #define LSIGNED (1) /* signed operation */ | |
57 | #define LDEFAULT (0) /* default : do nothing */ | |
58 | #define LSCC (1) /* set condition codes on result */ | |
c906108c | 59 | |
7a292a7a SS |
60 | #ifdef NEED_UI_LOOP_HOOK |
61 | /* How often to run the ui_loop update, when in use */ | |
62 | #define UI_LOOP_POLL_INTERVAL 0x32000 | |
63 | ||
64 | /* Counter for the ui_loop_hook update */ | |
65 | static long ui_loop_hook_counter = UI_LOOP_POLL_INTERVAL; | |
66 | ||
67 | /* Actual hook to call to run through gdb's gui event loop */ | |
68 | extern int (*ui_loop_hook) (int); | |
69 | #endif /* NEED_UI_LOOP_HOOK */ | |
70 | ||
71 | extern int stop_simulator; | |
72 | ||
c906108c SS |
73 | /***************************************************************************\ |
74 | * short-hand macros for LDR/STR * | |
75 | \***************************************************************************/ | |
76 | ||
77 | /* store post decrement writeback */ | |
78 | #define SHDOWNWB() \ | |
79 | lhs = LHS ; \ | |
80 | if (StoreHalfWord(state, instr, lhs)) \ | |
81 | LSBase = lhs - GetLS7RHS(state, instr) ; | |
82 | ||
83 | /* store post increment writeback */ | |
84 | #define SHUPWB() \ | |
85 | lhs = LHS ; \ | |
86 | if (StoreHalfWord(state, instr, lhs)) \ | |
87 | LSBase = lhs + GetLS7RHS(state, instr) ; | |
88 | ||
89 | /* store pre decrement */ | |
90 | #define SHPREDOWN() \ | |
91 | (void)StoreHalfWord(state, instr, LHS - GetLS7RHS(state, instr)) ; | |
92 | ||
93 | /* store pre decrement writeback */ | |
94 | #define SHPREDOWNWB() \ | |
95 | temp = LHS - GetLS7RHS(state, instr) ; \ | |
96 | if (StoreHalfWord(state, instr, temp)) \ | |
97 | LSBase = temp ; | |
98 | ||
99 | /* store pre increment */ | |
100 | #define SHPREUP() \ | |
dfcd3bfb | 101 | (void)StoreHalfWord(state, instr, LHS + GetLS7RHS(state, instr)) ; |
c906108c SS |
102 | |
103 | /* store pre increment writeback */ | |
104 | #define SHPREUPWB() \ | |
105 | temp = LHS + GetLS7RHS(state, instr) ; \ | |
106 | if (StoreHalfWord(state, instr, temp)) \ | |
107 | LSBase = temp ; | |
108 | ||
109 | /* load post decrement writeback */ | |
110 | #define LHPOSTDOWN() \ | |
111 | { \ | |
112 | int done = 1 ; \ | |
113 | lhs = LHS ; \ | |
114 | switch (BITS(5,6)) { \ | |
115 | case 1: /* H */ \ | |
116 | if (LoadHalfWord(state,instr,lhs,LUNSIGNED)) \ | |
117 | LSBase = lhs - GetLS7RHS(state,instr) ; \ | |
118 | break ; \ | |
119 | case 2: /* SB */ \ | |
120 | if (LoadByte(state,instr,lhs,LSIGNED)) \ | |
121 | LSBase = lhs - GetLS7RHS(state,instr) ; \ | |
122 | break ; \ | |
123 | case 3: /* SH */ \ | |
124 | if (LoadHalfWord(state,instr,lhs,LSIGNED)) \ | |
125 | LSBase = lhs - GetLS7RHS(state,instr) ; \ | |
126 | break ; \ | |
127 | case 0: /* SWP handled elsewhere */ \ | |
128 | default: \ | |
129 | done = 0 ; \ | |
130 | break ; \ | |
131 | } \ | |
132 | if (done) \ | |
133 | break ; \ | |
134 | } | |
135 | ||
136 | /* load post increment writeback */ | |
137 | #define LHPOSTUP() \ | |
138 | { \ | |
139 | int done = 1 ; \ | |
140 | lhs = LHS ; \ | |
141 | switch (BITS(5,6)) { \ | |
142 | case 1: /* H */ \ | |
143 | if (LoadHalfWord(state,instr,lhs,LUNSIGNED)) \ | |
144 | LSBase = lhs + GetLS7RHS(state,instr) ; \ | |
145 | break ; \ | |
146 | case 2: /* SB */ \ | |
147 | if (LoadByte(state,instr,lhs,LSIGNED)) \ | |
148 | LSBase = lhs + GetLS7RHS(state,instr) ; \ | |
149 | break ; \ | |
150 | case 3: /* SH */ \ | |
151 | if (LoadHalfWord(state,instr,lhs,LSIGNED)) \ | |
152 | LSBase = lhs + GetLS7RHS(state,instr) ; \ | |
153 | break ; \ | |
154 | case 0: /* SWP handled elsewhere */ \ | |
155 | default: \ | |
156 | done = 0 ; \ | |
157 | break ; \ | |
158 | } \ | |
159 | if (done) \ | |
160 | break ; \ | |
161 | } | |
162 | ||
163 | /* load pre decrement */ | |
164 | #define LHPREDOWN() \ | |
165 | { \ | |
166 | int done = 1 ; \ | |
167 | temp = LHS - GetLS7RHS(state,instr) ; \ | |
168 | switch (BITS(5,6)) { \ | |
169 | case 1: /* H */ \ | |
170 | (void)LoadHalfWord(state,instr,temp,LUNSIGNED) ; \ | |
171 | break ; \ | |
172 | case 2: /* SB */ \ | |
173 | (void)LoadByte(state,instr,temp,LSIGNED) ; \ | |
174 | break ; \ | |
175 | case 3: /* SH */ \ | |
176 | (void)LoadHalfWord(state,instr,temp,LSIGNED) ; \ | |
177 | break ; \ | |
178 | case 0: /* SWP handled elsewhere */ \ | |
179 | default: \ | |
180 | done = 0 ; \ | |
181 | break ; \ | |
182 | } \ | |
183 | if (done) \ | |
184 | break ; \ | |
185 | } | |
186 | ||
187 | /* load pre decrement writeback */ | |
188 | #define LHPREDOWNWB() \ | |
189 | { \ | |
190 | int done = 1 ; \ | |
191 | temp = LHS - GetLS7RHS(state, instr) ; \ | |
192 | switch (BITS(5,6)) { \ | |
193 | case 1: /* H */ \ | |
194 | if (LoadHalfWord(state,instr,temp,LUNSIGNED)) \ | |
195 | LSBase = temp ; \ | |
196 | break ; \ | |
197 | case 2: /* SB */ \ | |
198 | if (LoadByte(state,instr,temp,LSIGNED)) \ | |
199 | LSBase = temp ; \ | |
200 | break ; \ | |
201 | case 3: /* SH */ \ | |
202 | if (LoadHalfWord(state,instr,temp,LSIGNED)) \ | |
203 | LSBase = temp ; \ | |
204 | break ; \ | |
205 | case 0: /* SWP handled elsewhere */ \ | |
206 | default: \ | |
207 | done = 0 ; \ | |
208 | break ; \ | |
209 | } \ | |
210 | if (done) \ | |
211 | break ; \ | |
212 | } | |
213 | ||
214 | /* load pre increment */ | |
215 | #define LHPREUP() \ | |
216 | { \ | |
217 | int done = 1 ; \ | |
218 | temp = LHS + GetLS7RHS(state,instr) ; \ | |
219 | switch (BITS(5,6)) { \ | |
220 | case 1: /* H */ \ | |
221 | (void)LoadHalfWord(state,instr,temp,LUNSIGNED) ; \ | |
222 | break ; \ | |
223 | case 2: /* SB */ \ | |
224 | (void)LoadByte(state,instr,temp,LSIGNED) ; \ | |
225 | break ; \ | |
226 | case 3: /* SH */ \ | |
227 | (void)LoadHalfWord(state,instr,temp,LSIGNED) ; \ | |
228 | break ; \ | |
229 | case 0: /* SWP handled elsewhere */ \ | |
230 | default: \ | |
231 | done = 0 ; \ | |
232 | break ; \ | |
233 | } \ | |
234 | if (done) \ | |
235 | break ; \ | |
236 | } | |
237 | ||
238 | /* load pre increment writeback */ | |
239 | #define LHPREUPWB() \ | |
240 | { \ | |
241 | int done = 1 ; \ | |
242 | temp = LHS + GetLS7RHS(state, instr) ; \ | |
243 | switch (BITS(5,6)) { \ | |
244 | case 1: /* H */ \ | |
245 | if (LoadHalfWord(state,instr,temp,LUNSIGNED)) \ | |
246 | LSBase = temp ; \ | |
247 | break ; \ | |
248 | case 2: /* SB */ \ | |
249 | if (LoadByte(state,instr,temp,LSIGNED)) \ | |
250 | LSBase = temp ; \ | |
251 | break ; \ | |
252 | case 3: /* SH */ \ | |
253 | if (LoadHalfWord(state,instr,temp,LSIGNED)) \ | |
254 | LSBase = temp ; \ | |
255 | break ; \ | |
256 | case 0: /* SWP handled elsewhere */ \ | |
257 | default: \ | |
258 | done = 0 ; \ | |
259 | break ; \ | |
260 | } \ | |
261 | if (done) \ | |
262 | break ; \ | |
263 | } | |
264 | ||
265 | /***************************************************************************\ | |
266 | * EMULATION of ARM6 * | |
267 | \***************************************************************************/ | |
268 | ||
269 | /* The PC pipeline value depends on whether ARM or Thumb instructions | |
270 | are being executed: */ | |
271 | ARMword isize; | |
272 | ||
273 | #ifdef MODE32 | |
dfcd3bfb JM |
274 | ARMword |
275 | ARMul_Emulate32 (register ARMul_State * state) | |
c906108c SS |
276 | { |
277 | #else | |
dfcd3bfb JM |
278 | ARMword |
279 | ARMul_Emulate26 (register ARMul_State * state) | |
c906108c SS |
280 | { |
281 | #endif | |
dfcd3bfb | 282 | register ARMword instr, /* the current instruction */ |
6d358e86 | 283 | dest = 0, /* almost the DestBus */ |
dfcd3bfb | 284 | temp, /* ubiquitous third hand */ |
6d358e86 | 285 | pc = 0; /* the address of the current instruction */ |
dfcd3bfb | 286 | ARMword lhs, rhs; /* almost the ABus and BBus */ |
6d358e86 | 287 | ARMword decoded = 0, loaded = 0; /* instruction pipeline */ |
c906108c SS |
288 | |
289 | /***************************************************************************\ | |
290 | * Execute the next instruction * | |
291 | \***************************************************************************/ | |
292 | ||
dfcd3bfb JM |
293 | if (state->NextInstr < PRIMEPIPE) |
294 | { | |
295 | decoded = state->decoded; | |
296 | loaded = state->loaded; | |
297 | pc = state->pc; | |
c906108c SS |
298 | } |
299 | ||
dfcd3bfb JM |
300 | do |
301 | { /* just keep going */ | |
e063aa3b | 302 | isize = INSN_SIZE; |
dfcd3bfb JM |
303 | switch (state->NextInstr) |
304 | { | |
305 | case SEQ: | |
306 | state->Reg[15] += isize; /* Advance the pipeline, and an S cycle */ | |
307 | pc += isize; | |
308 | instr = decoded; | |
309 | decoded = loaded; | |
310 | loaded = ARMul_LoadInstrS (state, pc + (isize * 2), isize); | |
311 | break; | |
312 | ||
313 | case NONSEQ: | |
314 | state->Reg[15] += isize; /* Advance the pipeline, and an N cycle */ | |
315 | pc += isize; | |
316 | instr = decoded; | |
317 | decoded = loaded; | |
318 | loaded = ARMul_LoadInstrN (state, pc + (isize * 2), isize); | |
319 | NORMALCYCLE; | |
320 | break; | |
321 | ||
322 | case PCINCEDSEQ: | |
323 | pc += isize; /* Program counter advanced, and an S cycle */ | |
324 | instr = decoded; | |
325 | decoded = loaded; | |
326 | loaded = ARMul_LoadInstrS (state, pc + (isize * 2), isize); | |
327 | NORMALCYCLE; | |
328 | break; | |
329 | ||
330 | case PCINCEDNONSEQ: | |
331 | pc += isize; /* Program counter advanced, and an N cycle */ | |
332 | instr = decoded; | |
333 | decoded = loaded; | |
334 | loaded = ARMul_LoadInstrN (state, pc + (isize * 2), isize); | |
335 | NORMALCYCLE; | |
336 | break; | |
337 | ||
338 | case RESUME: /* The program counter has been changed */ | |
339 | pc = state->Reg[15]; | |
c906108c | 340 | #ifndef MODE32 |
dfcd3bfb JM |
341 | pc = pc & R15PCBITS; |
342 | #endif | |
343 | state->Reg[15] = pc + (isize * 2); | |
344 | state->Aborted = 0; | |
345 | instr = ARMul_ReLoadInstr (state, pc, isize); | |
346 | decoded = ARMul_ReLoadInstr (state, pc + isize, isize); | |
347 | loaded = ARMul_ReLoadInstr (state, pc + isize * 2, isize); | |
348 | NORMALCYCLE; | |
349 | break; | |
350 | ||
351 | default: /* The program counter has been changed */ | |
352 | pc = state->Reg[15]; | |
c906108c | 353 | #ifndef MODE32 |
dfcd3bfb JM |
354 | pc = pc & R15PCBITS; |
355 | #endif | |
356 | state->Reg[15] = pc + (isize * 2); | |
357 | state->Aborted = 0; | |
358 | instr = ARMul_LoadInstrN (state, pc, isize); | |
359 | decoded = ARMul_LoadInstrS (state, pc + (isize), isize); | |
360 | loaded = ARMul_LoadInstrS (state, pc + (isize * 2), isize); | |
361 | NORMALCYCLE; | |
362 | break; | |
363 | } | |
364 | if (state->EventSet) | |
365 | ARMul_EnvokeEvent (state); | |
366 | ||
c906108c | 367 | #if 0 |
dfcd3bfb JM |
368 | /* Enable this for a helpful bit of debugging when tracing is needed. */ |
369 | fprintf (stderr, "pc: %x, instr: %x\n", pc & ~1, instr); | |
370 | if (instr == 0) | |
371 | abort (); | |
372 | #endif | |
373 | ||
374 | if (state->Exception) | |
375 | { /* Any exceptions */ | |
376 | if (state->NresetSig == LOW) | |
377 | { | |
378 | ARMul_Abort (state, ARMul_ResetV); | |
379 | break; | |
380 | } | |
381 | else if (!state->NfiqSig && !FFLAG) | |
382 | { | |
383 | ARMul_Abort (state, ARMul_FIQV); | |
384 | break; | |
385 | } | |
386 | else if (!state->NirqSig && !IFLAG) | |
387 | { | |
388 | ARMul_Abort (state, ARMul_IRQV); | |
389 | break; | |
390 | } | |
391 | } | |
392 | ||
393 | if (state->CallDebug > 0) | |
394 | { | |
395 | instr = ARMul_Debug (state, pc, instr); | |
396 | if (state->Emulate < ONCE) | |
397 | { | |
398 | state->NextInstr = RESUME; | |
399 | break; | |
400 | } | |
401 | if (state->Debug) | |
402 | { | |
403 | fprintf (stderr, "At %08lx Instr %08lx Mode %02lx\n", pc, instr, | |
404 | state->Mode); | |
405 | (void) fgetc (stdin); | |
406 | } | |
407 | } | |
408 | else if (state->Emulate < ONCE) | |
409 | { | |
410 | state->NextInstr = RESUME; | |
411 | break; | |
412 | } | |
413 | ||
414 | state->NumInstrs++; | |
c906108c SS |
415 | |
416 | #ifdef MODET | |
dfcd3bfb JM |
417 | /* Provide Thumb instruction decoding. If the processor is in Thumb |
418 | mode, then we can simply decode the Thumb instruction, and map it | |
419 | to the corresponding ARM instruction (by directly loading the | |
420 | instr variable, and letting the normal ARM simulator | |
421 | execute). There are some caveats to ensure that the correct | |
422 | pipelined PC value is used when executing Thumb code, and also for | |
423 | dealing with the BL instruction. */ | |
424 | if (TFLAG) | |
425 | { /* check if in Thumb mode */ | |
426 | ARMword new; | |
427 | switch (ARMul_ThumbDecode (state, pc, instr, &new)) | |
428 | { | |
429 | case t_undefined: | |
430 | ARMul_UndefInstr (state, instr); /* This is a Thumb instruction */ | |
66210567 | 431 | goto donext; |
dfcd3bfb JM |
432 | |
433 | case t_branch: /* already processed */ | |
434 | goto donext; | |
435 | ||
436 | case t_decoded: /* ARM instruction available */ | |
437 | instr = new; /* so continue instruction decoding */ | |
438 | break; | |
439 | } | |
440 | } | |
c906108c SS |
441 | #endif |
442 | ||
443 | /***************************************************************************\ | |
444 | * Check the condition codes * | |
445 | \***************************************************************************/ | |
dfcd3bfb JM |
446 | if ((temp = TOPBITS (28)) == AL) |
447 | goto mainswitch; /* vile deed in the need for speed */ | |
448 | ||
449 | switch ((int) TOPBITS (28)) | |
450 | { /* check the condition code */ | |
451 | case AL: | |
452 | temp = TRUE; | |
453 | break; | |
454 | case NV: | |
455 | temp = FALSE; | |
456 | break; | |
457 | case EQ: | |
458 | temp = ZFLAG; | |
459 | break; | |
460 | case NE: | |
461 | temp = !ZFLAG; | |
462 | break; | |
463 | case VS: | |
464 | temp = VFLAG; | |
465 | break; | |
466 | case VC: | |
467 | temp = !VFLAG; | |
468 | break; | |
469 | case MI: | |
470 | temp = NFLAG; | |
471 | break; | |
472 | case PL: | |
473 | temp = !NFLAG; | |
474 | break; | |
475 | case CS: | |
476 | temp = CFLAG; | |
477 | break; | |
478 | case CC: | |
479 | temp = !CFLAG; | |
480 | break; | |
481 | case HI: | |
482 | temp = (CFLAG && !ZFLAG); | |
483 | break; | |
484 | case LS: | |
485 | temp = (!CFLAG || ZFLAG); | |
486 | break; | |
487 | case GE: | |
488 | temp = ((!NFLAG && !VFLAG) || (NFLAG && VFLAG)); | |
489 | break; | |
490 | case LT: | |
491 | temp = ((NFLAG && !VFLAG) || (!NFLAG && VFLAG)); | |
492 | break; | |
493 | case GT: | |
494 | temp = ((!NFLAG && !VFLAG && !ZFLAG) || (NFLAG && VFLAG && !ZFLAG)); | |
495 | break; | |
496 | case LE: | |
497 | temp = ((NFLAG && !VFLAG) || (!NFLAG && VFLAG)) || ZFLAG; | |
498 | break; | |
499 | } /* cc check */ | |
c906108c SS |
500 | |
501 | /***************************************************************************\ | |
502 | * Actual execution of instructions begins here * | |
503 | \***************************************************************************/ | |
504 | ||
dfcd3bfb JM |
505 | if (temp) |
506 | { /* if the condition codes don't match, stop here */ | |
507 | mainswitch: | |
c906108c | 508 | |
dfcd3bfb JM |
509 | |
510 | switch ((int) BITS (20, 27)) | |
511 | { | |
c906108c SS |
512 | |
513 | /***************************************************************************\ | |
514 | * Data Processing Register RHS Instructions * | |
515 | \***************************************************************************/ | |
516 | ||
dfcd3bfb | 517 | case 0x00: /* AND reg and MUL */ |
c906108c | 518 | #ifdef MODET |
dfcd3bfb JM |
519 | if (BITS (4, 11) == 0xB) |
520 | { | |
521 | /* STRH register offset, no write-back, down, post indexed */ | |
522 | SHDOWNWB (); | |
523 | break; | |
524 | } | |
525 | /* TODO: CHECK: should 0xD and 0xF generate undefined intruction aborts? */ | |
526 | #endif | |
527 | if (BITS (4, 7) == 9) | |
528 | { /* MUL */ | |
529 | rhs = state->Reg[MULRHSReg]; | |
530 | if (MULLHSReg == MULDESTReg) | |
531 | { | |
532 | UNDEF_MULDestEQOp1; | |
533 | state->Reg[MULDESTReg] = 0; | |
534 | } | |
535 | else if (MULDESTReg != 15) | |
536 | state->Reg[MULDESTReg] = state->Reg[MULLHSReg] * rhs; | |
537 | else | |
538 | { | |
539 | UNDEF_MULPCDest; | |
540 | } | |
541 | for (dest = 0, temp = 0; dest < 32; dest++) | |
542 | if (rhs & (1L << dest)) | |
543 | temp = dest; /* mult takes this many/2 I cycles */ | |
544 | ARMul_Icycles (state, ARMul_MultTable[temp], 0L); | |
545 | } | |
546 | else | |
547 | { /* AND reg */ | |
548 | rhs = DPRegRHS; | |
549 | dest = LHS & rhs; | |
550 | WRITEDEST (dest); | |
551 | } | |
552 | break; | |
553 | ||
554 | case 0x01: /* ANDS reg and MULS */ | |
c906108c | 555 | #ifdef MODET |
dfcd3bfb JM |
556 | if ((BITS (4, 11) & 0xF9) == 0x9) |
557 | { | |
558 | /* LDR register offset, no write-back, down, post indexed */ | |
559 | LHPOSTDOWN (); | |
560 | /* fall through to rest of decoding */ | |
561 | } | |
562 | #endif | |
563 | if (BITS (4, 7) == 9) | |
564 | { /* MULS */ | |
565 | rhs = state->Reg[MULRHSReg]; | |
566 | if (MULLHSReg == MULDESTReg) | |
567 | { | |
568 | UNDEF_MULDestEQOp1; | |
569 | state->Reg[MULDESTReg] = 0; | |
570 | CLEARN; | |
571 | SETZ; | |
572 | } | |
573 | else if (MULDESTReg != 15) | |
574 | { | |
575 | dest = state->Reg[MULLHSReg] * rhs; | |
576 | ARMul_NegZero (state, dest); | |
577 | state->Reg[MULDESTReg] = dest; | |
578 | } | |
579 | else | |
580 | { | |
581 | UNDEF_MULPCDest; | |
582 | } | |
583 | for (dest = 0, temp = 0; dest < 32; dest++) | |
584 | if (rhs & (1L << dest)) | |
585 | temp = dest; /* mult takes this many/2 I cycles */ | |
586 | ARMul_Icycles (state, ARMul_MultTable[temp], 0L); | |
587 | } | |
588 | else | |
589 | { /* ANDS reg */ | |
590 | rhs = DPSRegRHS; | |
591 | dest = LHS & rhs; | |
592 | WRITESDEST (dest); | |
593 | } | |
594 | break; | |
595 | ||
596 | case 0x02: /* EOR reg and MLA */ | |
c906108c | 597 | #ifdef MODET |
dfcd3bfb JM |
598 | if (BITS (4, 11) == 0xB) |
599 | { | |
600 | /* STRH register offset, write-back, down, post indexed */ | |
601 | SHDOWNWB (); | |
602 | break; | |
603 | } | |
604 | #endif | |
605 | if (BITS (4, 7) == 9) | |
606 | { /* MLA */ | |
607 | rhs = state->Reg[MULRHSReg]; | |
608 | if (MULLHSReg == MULDESTReg) | |
609 | { | |
610 | UNDEF_MULDestEQOp1; | |
611 | state->Reg[MULDESTReg] = state->Reg[MULACCReg]; | |
612 | } | |
613 | else if (MULDESTReg != 15) | |
614 | state->Reg[MULDESTReg] = | |
615 | state->Reg[MULLHSReg] * rhs + state->Reg[MULACCReg]; | |
616 | else | |
617 | { | |
618 | UNDEF_MULPCDest; | |
619 | } | |
620 | for (dest = 0, temp = 0; dest < 32; dest++) | |
621 | if (rhs & (1L << dest)) | |
622 | temp = dest; /* mult takes this many/2 I cycles */ | |
623 | ARMul_Icycles (state, ARMul_MultTable[temp], 0L); | |
624 | } | |
625 | else | |
626 | { | |
627 | rhs = DPRegRHS; | |
628 | dest = LHS ^ rhs; | |
629 | WRITEDEST (dest); | |
630 | } | |
631 | break; | |
632 | ||
633 | case 0x03: /* EORS reg and MLAS */ | |
c906108c | 634 | #ifdef MODET |
dfcd3bfb JM |
635 | if ((BITS (4, 11) & 0xF9) == 0x9) |
636 | { | |
637 | /* LDR register offset, write-back, down, post-indexed */ | |
638 | LHPOSTDOWN (); | |
639 | /* fall through to rest of the decoding */ | |
640 | } | |
641 | #endif | |
642 | if (BITS (4, 7) == 9) | |
643 | { /* MLAS */ | |
644 | rhs = state->Reg[MULRHSReg]; | |
645 | if (MULLHSReg == MULDESTReg) | |
646 | { | |
647 | UNDEF_MULDestEQOp1; | |
648 | dest = state->Reg[MULACCReg]; | |
649 | ARMul_NegZero (state, dest); | |
650 | state->Reg[MULDESTReg] = dest; | |
651 | } | |
652 | else if (MULDESTReg != 15) | |
653 | { | |
654 | dest = | |
655 | state->Reg[MULLHSReg] * rhs + state->Reg[MULACCReg]; | |
656 | ARMul_NegZero (state, dest); | |
657 | state->Reg[MULDESTReg] = dest; | |
658 | } | |
659 | else | |
660 | { | |
661 | UNDEF_MULPCDest; | |
662 | } | |
663 | for (dest = 0, temp = 0; dest < 32; dest++) | |
664 | if (rhs & (1L << dest)) | |
665 | temp = dest; /* mult takes this many/2 I cycles */ | |
666 | ARMul_Icycles (state, ARMul_MultTable[temp], 0L); | |
667 | } | |
668 | else | |
669 | { /* EORS Reg */ | |
670 | rhs = DPSRegRHS; | |
671 | dest = LHS ^ rhs; | |
672 | WRITESDEST (dest); | |
673 | } | |
674 | break; | |
675 | ||
676 | case 0x04: /* SUB reg */ | |
c906108c | 677 | #ifdef MODET |
dfcd3bfb JM |
678 | if (BITS (4, 7) == 0xB) |
679 | { | |
680 | /* STRH immediate offset, no write-back, down, post indexed */ | |
681 | SHDOWNWB (); | |
682 | break; | |
683 | } | |
684 | #endif | |
685 | rhs = DPRegRHS; | |
686 | dest = LHS - rhs; | |
687 | WRITEDEST (dest); | |
688 | break; | |
689 | ||
690 | case 0x05: /* SUBS reg */ | |
c906108c | 691 | #ifdef MODET |
dfcd3bfb JM |
692 | if ((BITS (4, 7) & 0x9) == 0x9) |
693 | { | |
694 | /* LDR immediate offset, no write-back, down, post indexed */ | |
695 | LHPOSTDOWN (); | |
696 | /* fall through to the rest of the instruction decoding */ | |
697 | } | |
698 | #endif | |
699 | lhs = LHS; | |
700 | rhs = DPRegRHS; | |
701 | dest = lhs - rhs; | |
702 | if ((lhs >= rhs) || ((rhs | lhs) >> 31)) | |
703 | { | |
704 | ARMul_SubCarry (state, lhs, rhs, dest); | |
705 | ARMul_SubOverflow (state, lhs, rhs, dest); | |
706 | } | |
707 | else | |
708 | { | |
709 | CLEARC; | |
710 | CLEARV; | |
711 | } | |
712 | WRITESDEST (dest); | |
713 | break; | |
714 | ||
715 | case 0x06: /* RSB reg */ | |
c906108c | 716 | #ifdef MODET |
dfcd3bfb JM |
717 | if (BITS (4, 7) == 0xB) |
718 | { | |
719 | /* STRH immediate offset, write-back, down, post indexed */ | |
720 | SHDOWNWB (); | |
721 | break; | |
722 | } | |
723 | #endif | |
724 | rhs = DPRegRHS; | |
725 | dest = rhs - LHS; | |
726 | WRITEDEST (dest); | |
727 | break; | |
728 | ||
729 | case 0x07: /* RSBS reg */ | |
c906108c | 730 | #ifdef MODET |
dfcd3bfb JM |
731 | if ((BITS (4, 7) & 0x9) == 0x9) |
732 | { | |
733 | /* LDR immediate offset, write-back, down, post indexed */ | |
734 | LHPOSTDOWN (); | |
735 | /* fall through to remainder of instruction decoding */ | |
736 | } | |
737 | #endif | |
738 | lhs = LHS; | |
739 | rhs = DPRegRHS; | |
740 | dest = rhs - lhs; | |
741 | if ((rhs >= lhs) || ((rhs | lhs) >> 31)) | |
742 | { | |
743 | ARMul_SubCarry (state, rhs, lhs, dest); | |
744 | ARMul_SubOverflow (state, rhs, lhs, dest); | |
745 | } | |
746 | else | |
747 | { | |
748 | CLEARC; | |
749 | CLEARV; | |
750 | } | |
751 | WRITESDEST (dest); | |
752 | break; | |
753 | ||
754 | case 0x08: /* ADD reg */ | |
c906108c | 755 | #ifdef MODET |
dfcd3bfb JM |
756 | if (BITS (4, 11) == 0xB) |
757 | { | |
758 | /* STRH register offset, no write-back, up, post indexed */ | |
759 | SHUPWB (); | |
760 | break; | |
761 | } | |
c906108c SS |
762 | #endif |
763 | #ifdef MODET | |
dfcd3bfb JM |
764 | if (BITS (4, 7) == 0x9) |
765 | { /* MULL */ | |
766 | /* 32x32 = 64 */ | |
767 | ARMul_Icycles (state, | |
768 | Multiply64 (state, instr, LUNSIGNED, | |
769 | LDEFAULT), 0L); | |
770 | break; | |
771 | } | |
772 | #endif | |
773 | rhs = DPRegRHS; | |
774 | dest = LHS + rhs; | |
775 | WRITEDEST (dest); | |
776 | break; | |
777 | ||
778 | case 0x09: /* ADDS reg */ | |
c906108c | 779 | #ifdef MODET |
dfcd3bfb JM |
780 | if ((BITS (4, 11) & 0xF9) == 0x9) |
781 | { | |
782 | /* LDR register offset, no write-back, up, post indexed */ | |
783 | LHPOSTUP (); | |
784 | /* fall through to remaining instruction decoding */ | |
785 | } | |
c906108c SS |
786 | #endif |
787 | #ifdef MODET | |
dfcd3bfb JM |
788 | if (BITS (4, 7) == 0x9) |
789 | { /* MULL */ | |
790 | /* 32x32=64 */ | |
791 | ARMul_Icycles (state, | |
792 | Multiply64 (state, instr, LUNSIGNED, LSCC), | |
793 | 0L); | |
794 | break; | |
795 | } | |
796 | #endif | |
797 | lhs = LHS; | |
798 | rhs = DPRegRHS; | |
799 | dest = lhs + rhs; | |
800 | ASSIGNZ (dest == 0); | |
801 | if ((lhs | rhs) >> 30) | |
802 | { /* possible C,V,N to set */ | |
803 | ASSIGNN (NEG (dest)); | |
804 | ARMul_AddCarry (state, lhs, rhs, dest); | |
805 | ARMul_AddOverflow (state, lhs, rhs, dest); | |
806 | } | |
807 | else | |
808 | { | |
809 | CLEARN; | |
810 | CLEARC; | |
811 | CLEARV; | |
812 | } | |
813 | WRITESDEST (dest); | |
814 | break; | |
815 | ||
816 | case 0x0a: /* ADC reg */ | |
c906108c | 817 | #ifdef MODET |
dfcd3bfb JM |
818 | if (BITS (4, 11) == 0xB) |
819 | { | |
820 | /* STRH register offset, write-back, up, post-indexed */ | |
821 | SHUPWB (); | |
822 | break; | |
823 | } | |
c906108c SS |
824 | #endif |
825 | #ifdef MODET | |
dfcd3bfb JM |
826 | if (BITS (4, 7) == 0x9) |
827 | { /* MULL */ | |
828 | /* 32x32=64 */ | |
829 | ARMul_Icycles (state, | |
830 | MultiplyAdd64 (state, instr, LUNSIGNED, | |
831 | LDEFAULT), 0L); | |
832 | break; | |
833 | } | |
834 | #endif | |
835 | rhs = DPRegRHS; | |
836 | dest = LHS + rhs + CFLAG; | |
837 | WRITEDEST (dest); | |
838 | break; | |
839 | ||
840 | case 0x0b: /* ADCS reg */ | |
c906108c | 841 | #ifdef MODET |
dfcd3bfb JM |
842 | if ((BITS (4, 11) & 0xF9) == 0x9) |
843 | { | |
844 | /* LDR register offset, write-back, up, post indexed */ | |
845 | LHPOSTUP (); | |
846 | /* fall through to remaining instruction decoding */ | |
847 | } | |
c906108c SS |
848 | #endif |
849 | #ifdef MODET | |
dfcd3bfb JM |
850 | if (BITS (4, 7) == 0x9) |
851 | { /* MULL */ | |
852 | /* 32x32=64 */ | |
853 | ARMul_Icycles (state, | |
854 | MultiplyAdd64 (state, instr, LUNSIGNED, | |
855 | LSCC), 0L); | |
856 | break; | |
857 | } | |
858 | #endif | |
859 | lhs = LHS; | |
860 | rhs = DPRegRHS; | |
861 | dest = lhs + rhs + CFLAG; | |
862 | ASSIGNZ (dest == 0); | |
863 | if ((lhs | rhs) >> 30) | |
864 | { /* possible C,V,N to set */ | |
865 | ASSIGNN (NEG (dest)); | |
866 | ARMul_AddCarry (state, lhs, rhs, dest); | |
867 | ARMul_AddOverflow (state, lhs, rhs, dest); | |
868 | } | |
869 | else | |
870 | { | |
871 | CLEARN; | |
872 | CLEARC; | |
873 | CLEARV; | |
874 | } | |
875 | WRITESDEST (dest); | |
876 | break; | |
877 | ||
878 | case 0x0c: /* SBC reg */ | |
c906108c | 879 | #ifdef MODET |
dfcd3bfb JM |
880 | if (BITS (4, 7) == 0xB) |
881 | { | |
882 | /* STRH immediate offset, no write-back, up post indexed */ | |
883 | SHUPWB (); | |
884 | break; | |
885 | } | |
c906108c SS |
886 | #endif |
887 | #ifdef MODET | |
dfcd3bfb JM |
888 | if (BITS (4, 7) == 0x9) |
889 | { /* MULL */ | |
890 | /* 32x32=64 */ | |
891 | ARMul_Icycles (state, | |
892 | Multiply64 (state, instr, LSIGNED, LDEFAULT), | |
893 | 0L); | |
894 | break; | |
895 | } | |
896 | #endif | |
897 | rhs = DPRegRHS; | |
898 | dest = LHS - rhs - !CFLAG; | |
899 | WRITEDEST (dest); | |
900 | break; | |
901 | ||
902 | case 0x0d: /* SBCS reg */ | |
c906108c | 903 | #ifdef MODET |
dfcd3bfb JM |
904 | if ((BITS (4, 7) & 0x9) == 0x9) |
905 | { | |
906 | /* LDR immediate offset, no write-back, up, post indexed */ | |
907 | LHPOSTUP (); | |
908 | } | |
c906108c SS |
909 | #endif |
910 | #ifdef MODET | |
dfcd3bfb JM |
911 | if (BITS (4, 7) == 0x9) |
912 | { /* MULL */ | |
913 | /* 32x32=64 */ | |
914 | ARMul_Icycles (state, | |
915 | Multiply64 (state, instr, LSIGNED, LSCC), | |
916 | 0L); | |
917 | break; | |
918 | } | |
919 | #endif | |
920 | lhs = LHS; | |
921 | rhs = DPRegRHS; | |
922 | dest = lhs - rhs - !CFLAG; | |
923 | if ((lhs >= rhs) || ((rhs | lhs) >> 31)) | |
924 | { | |
925 | ARMul_SubCarry (state, lhs, rhs, dest); | |
926 | ARMul_SubOverflow (state, lhs, rhs, dest); | |
927 | } | |
928 | else | |
929 | { | |
930 | CLEARC; | |
931 | CLEARV; | |
932 | } | |
933 | WRITESDEST (dest); | |
934 | break; | |
935 | ||
936 | case 0x0e: /* RSC reg */ | |
c906108c | 937 | #ifdef MODET |
dfcd3bfb JM |
938 | if (BITS (4, 7) == 0xB) |
939 | { | |
940 | /* STRH immediate offset, write-back, up, post indexed */ | |
941 | SHUPWB (); | |
942 | break; | |
943 | } | |
c906108c SS |
944 | #endif |
945 | #ifdef MODET | |
dfcd3bfb JM |
946 | if (BITS (4, 7) == 0x9) |
947 | { /* MULL */ | |
948 | /* 32x32=64 */ | |
949 | ARMul_Icycles (state, | |
950 | MultiplyAdd64 (state, instr, LSIGNED, | |
951 | LDEFAULT), 0L); | |
952 | break; | |
953 | } | |
954 | #endif | |
955 | rhs = DPRegRHS; | |
956 | dest = rhs - LHS - !CFLAG; | |
957 | WRITEDEST (dest); | |
958 | break; | |
959 | ||
960 | case 0x0f: /* RSCS reg */ | |
c906108c | 961 | #ifdef MODET |
dfcd3bfb JM |
962 | if ((BITS (4, 7) & 0x9) == 0x9) |
963 | { | |
964 | /* LDR immediate offset, write-back, up, post indexed */ | |
965 | LHPOSTUP (); | |
966 | /* fall through to remaining instruction decoding */ | |
967 | } | |
c906108c SS |
968 | #endif |
969 | #ifdef MODET | |
dfcd3bfb JM |
970 | if (BITS (4, 7) == 0x9) |
971 | { /* MULL */ | |
972 | /* 32x32=64 */ | |
973 | ARMul_Icycles (state, | |
974 | MultiplyAdd64 (state, instr, LSIGNED, LSCC), | |
975 | 0L); | |
976 | break; | |
977 | } | |
978 | #endif | |
979 | lhs = LHS; | |
980 | rhs = DPRegRHS; | |
981 | dest = rhs - lhs - !CFLAG; | |
982 | if ((rhs >= lhs) || ((rhs | lhs) >> 31)) | |
983 | { | |
984 | ARMul_SubCarry (state, rhs, lhs, dest); | |
985 | ARMul_SubOverflow (state, rhs, lhs, dest); | |
986 | } | |
987 | else | |
988 | { | |
989 | CLEARC; | |
990 | CLEARV; | |
991 | } | |
992 | WRITESDEST (dest); | |
993 | break; | |
994 | ||
995 | case 0x10: /* TST reg and MRS CPSR and SWP word */ | |
c906108c | 996 | #ifdef MODET |
dfcd3bfb JM |
997 | if (BITS (4, 11) == 0xB) |
998 | { | |
999 | /* STRH register offset, no write-back, down, pre indexed */ | |
1000 | SHPREDOWN (); | |
1001 | break; | |
1002 | } | |
1003 | #endif | |
1004 | if (BITS (4, 11) == 9) | |
1005 | { /* SWP */ | |
1006 | UNDEF_SWPPC; | |
1007 | temp = LHS; | |
1008 | BUSUSEDINCPCS; | |
c906108c | 1009 | #ifndef MODE32 |
dfcd3bfb JM |
1010 | if (VECTORACCESS (temp) || ADDREXCEPT (temp)) |
1011 | { | |
1012 | INTERNALABORT (temp); | |
1013 | (void) ARMul_LoadWordN (state, temp); | |
1014 | (void) ARMul_LoadWordN (state, temp); | |
1015 | } | |
1016 | else | |
1017 | #endif | |
1018 | dest = ARMul_SwapWord (state, temp, state->Reg[RHSReg]); | |
1019 | if (temp & 3) | |
1020 | DEST = ARMul_Align (state, temp, dest); | |
1021 | else | |
1022 | DEST = dest; | |
1023 | if (state->abortSig || state->Aborted) | |
1024 | { | |
1025 | TAKEABORT; | |
1026 | } | |
1027 | } | |
1028 | else if ((BITS (0, 11) == 0) && (LHSReg == 15)) | |
1029 | { /* MRS CPSR */ | |
1030 | UNDEF_MRSPC; | |
1031 | DEST = ECC | EINT | EMODE; | |
1032 | } | |
1033 | else | |
1034 | { | |
1035 | UNDEF_Test; | |
1036 | } | |
1037 | break; | |
1038 | ||
1039 | case 0x11: /* TSTP reg */ | |
c906108c | 1040 | #ifdef MODET |
dfcd3bfb JM |
1041 | if ((BITS (4, 11) & 0xF9) == 0x9) |
1042 | { | |
1043 | /* LDR register offset, no write-back, down, pre indexed */ | |
1044 | LHPREDOWN (); | |
1045 | /* continue with remaining instruction decode */ | |
1046 | } | |
1047 | #endif | |
1048 | if (DESTReg == 15) | |
1049 | { /* TSTP reg */ | |
c906108c | 1050 | #ifdef MODE32 |
dfcd3bfb JM |
1051 | state->Cpsr = GETSPSR (state->Bank); |
1052 | ARMul_CPSRAltered (state); | |
c906108c | 1053 | #else |
dfcd3bfb JM |
1054 | rhs = DPRegRHS; |
1055 | temp = LHS & rhs; | |
1056 | SETR15PSR (temp); | |
1057 | #endif | |
1058 | } | |
1059 | else | |
1060 | { /* TST reg */ | |
1061 | rhs = DPSRegRHS; | |
1062 | dest = LHS & rhs; | |
1063 | ARMul_NegZero (state, dest); | |
1064 | } | |
1065 | break; | |
1066 | ||
1067 | case 0x12: /* TEQ reg and MSR reg to CPSR (ARM6) */ | |
c906108c | 1068 | #ifdef MODET |
dfcd3bfb JM |
1069 | if (BITS (4, 11) == 0xB) |
1070 | { | |
1071 | /* STRH register offset, write-back, down, pre indexed */ | |
1072 | SHPREDOWNWB (); | |
1073 | break; | |
1074 | } | |
c906108c SS |
1075 | #endif |
1076 | #ifdef MODET | |
dfcd3bfb JM |
1077 | if (BITS (4, 27) == 0x12FFF1) |
1078 | { /* BX */ | |
892c6b9d AO |
1079 | WriteR15Branch (state, state->Reg[RHSReg]); |
1080 | break; | |
dfcd3bfb JM |
1081 | } |
1082 | #endif | |
4ef2594f | 1083 | if (DESTReg == 15) |
dfcd3bfb JM |
1084 | { /* MSR reg to CPSR */ |
1085 | UNDEF_MSRPC; | |
1086 | temp = DPRegRHS; | |
1087 | ARMul_FixCPSR (state, instr, temp); | |
1088 | } | |
1089 | else | |
1090 | { | |
1091 | UNDEF_Test; | |
1092 | } | |
1093 | break; | |
1094 | ||
1095 | case 0x13: /* TEQP reg */ | |
c906108c | 1096 | #ifdef MODET |
dfcd3bfb JM |
1097 | if ((BITS (4, 11) & 0xF9) == 0x9) |
1098 | { | |
1099 | /* LDR register offset, write-back, down, pre indexed */ | |
1100 | LHPREDOWNWB (); | |
1101 | /* continue with remaining instruction decode */ | |
1102 | } | |
1103 | #endif | |
1104 | if (DESTReg == 15) | |
1105 | { /* TEQP reg */ | |
c906108c | 1106 | #ifdef MODE32 |
dfcd3bfb JM |
1107 | state->Cpsr = GETSPSR (state->Bank); |
1108 | ARMul_CPSRAltered (state); | |
c906108c | 1109 | #else |
dfcd3bfb JM |
1110 | rhs = DPRegRHS; |
1111 | temp = LHS ^ rhs; | |
1112 | SETR15PSR (temp); | |
1113 | #endif | |
1114 | } | |
1115 | else | |
1116 | { /* TEQ Reg */ | |
1117 | rhs = DPSRegRHS; | |
1118 | dest = LHS ^ rhs; | |
1119 | ARMul_NegZero (state, dest); | |
1120 | } | |
1121 | break; | |
1122 | ||
1123 | case 0x14: /* CMP reg and MRS SPSR and SWP byte */ | |
c906108c | 1124 | #ifdef MODET |
dfcd3bfb JM |
1125 | if (BITS (4, 7) == 0xB) |
1126 | { | |
1127 | /* STRH immediate offset, no write-back, down, pre indexed */ | |
1128 | SHPREDOWN (); | |
1129 | break; | |
1130 | } | |
1131 | #endif | |
1132 | if (BITS (4, 11) == 9) | |
1133 | { /* SWP */ | |
1134 | UNDEF_SWPPC; | |
1135 | temp = LHS; | |
1136 | BUSUSEDINCPCS; | |
c906108c | 1137 | #ifndef MODE32 |
dfcd3bfb JM |
1138 | if (VECTORACCESS (temp) || ADDREXCEPT (temp)) |
1139 | { | |
1140 | INTERNALABORT (temp); | |
1141 | (void) ARMul_LoadByte (state, temp); | |
1142 | (void) ARMul_LoadByte (state, temp); | |
1143 | } | |
1144 | else | |
1145 | #endif | |
1146 | DEST = ARMul_SwapByte (state, temp, state->Reg[RHSReg]); | |
1147 | if (state->abortSig || state->Aborted) | |
1148 | { | |
1149 | TAKEABORT; | |
1150 | } | |
1151 | } | |
1152 | else if ((BITS (0, 11) == 0) && (LHSReg == 15)) | |
1153 | { /* MRS SPSR */ | |
1154 | UNDEF_MRSPC; | |
1155 | DEST = GETSPSR (state->Bank); | |
1156 | } | |
1157 | else | |
1158 | { | |
1159 | UNDEF_Test; | |
1160 | } | |
1161 | break; | |
1162 | ||
1163 | case 0x15: /* CMPP reg */ | |
c906108c | 1164 | #ifdef MODET |
dfcd3bfb JM |
1165 | if ((BITS (4, 7) & 0x9) == 0x9) |
1166 | { | |
1167 | /* LDR immediate offset, no write-back, down, pre indexed */ | |
1168 | LHPREDOWN (); | |
1169 | /* continue with remaining instruction decode */ | |
1170 | } | |
1171 | #endif | |
1172 | if (DESTReg == 15) | |
1173 | { /* CMPP reg */ | |
c906108c | 1174 | #ifdef MODE32 |
dfcd3bfb JM |
1175 | state->Cpsr = GETSPSR (state->Bank); |
1176 | ARMul_CPSRAltered (state); | |
c906108c | 1177 | #else |
dfcd3bfb JM |
1178 | rhs = DPRegRHS; |
1179 | temp = LHS - rhs; | |
1180 | SETR15PSR (temp); | |
1181 | #endif | |
1182 | } | |
1183 | else | |
1184 | { /* CMP reg */ | |
1185 | lhs = LHS; | |
1186 | rhs = DPRegRHS; | |
1187 | dest = lhs - rhs; | |
1188 | ARMul_NegZero (state, dest); | |
1189 | if ((lhs >= rhs) || ((rhs | lhs) >> 31)) | |
1190 | { | |
1191 | ARMul_SubCarry (state, lhs, rhs, dest); | |
1192 | ARMul_SubOverflow (state, lhs, rhs, dest); | |
1193 | } | |
1194 | else | |
1195 | { | |
1196 | CLEARC; | |
1197 | CLEARV; | |
1198 | } | |
1199 | } | |
1200 | break; | |
1201 | ||
1202 | case 0x16: /* CMN reg and MSR reg to SPSR */ | |
c906108c | 1203 | #ifdef MODET |
dfcd3bfb JM |
1204 | if (BITS (4, 7) == 0xB) |
1205 | { | |
1206 | /* STRH immediate offset, write-back, down, pre indexed */ | |
1207 | SHPREDOWNWB (); | |
1208 | break; | |
1209 | } | |
1210 | #endif | |
4ef2594f | 1211 | if (DESTReg == 15) |
dfcd3bfb JM |
1212 | { /* MSR */ |
1213 | UNDEF_MSRPC; | |
1214 | ARMul_FixSPSR (state, instr, DPRegRHS); | |
1215 | } | |
1216 | else | |
1217 | { | |
1218 | UNDEF_Test; | |
1219 | } | |
1220 | break; | |
1221 | ||
1222 | case 0x17: /* CMNP reg */ | |
c906108c | 1223 | #ifdef MODET |
dfcd3bfb JM |
1224 | if ((BITS (4, 7) & 0x9) == 0x9) |
1225 | { | |
1226 | /* LDR immediate offset, write-back, down, pre indexed */ | |
1227 | LHPREDOWNWB (); | |
1228 | /* continue with remaining instruction decoding */ | |
1229 | } | |
1230 | #endif | |
1231 | if (DESTReg == 15) | |
1232 | { | |
c906108c | 1233 | #ifdef MODE32 |
dfcd3bfb JM |
1234 | state->Cpsr = GETSPSR (state->Bank); |
1235 | ARMul_CPSRAltered (state); | |
c906108c | 1236 | #else |
dfcd3bfb JM |
1237 | rhs = DPRegRHS; |
1238 | temp = LHS + rhs; | |
1239 | SETR15PSR (temp); | |
1240 | #endif | |
1241 | break; | |
1242 | } | |
1243 | else | |
1244 | { /* CMN reg */ | |
1245 | lhs = LHS; | |
1246 | rhs = DPRegRHS; | |
1247 | dest = lhs + rhs; | |
1248 | ASSIGNZ (dest == 0); | |
1249 | if ((lhs | rhs) >> 30) | |
1250 | { /* possible C,V,N to set */ | |
1251 | ASSIGNN (NEG (dest)); | |
1252 | ARMul_AddCarry (state, lhs, rhs, dest); | |
1253 | ARMul_AddOverflow (state, lhs, rhs, dest); | |
1254 | } | |
1255 | else | |
1256 | { | |
1257 | CLEARN; | |
1258 | CLEARC; | |
1259 | CLEARV; | |
1260 | } | |
1261 | } | |
1262 | break; | |
1263 | ||
1264 | case 0x18: /* ORR reg */ | |
c906108c | 1265 | #ifdef MODET |
dfcd3bfb JM |
1266 | if (BITS (4, 11) == 0xB) |
1267 | { | |
1268 | /* STRH register offset, no write-back, up, pre indexed */ | |
1269 | SHPREUP (); | |
1270 | break; | |
1271 | } | |
1272 | #endif | |
1273 | rhs = DPRegRHS; | |
1274 | dest = LHS | rhs; | |
1275 | WRITEDEST (dest); | |
1276 | break; | |
1277 | ||
1278 | case 0x19: /* ORRS reg */ | |
c906108c | 1279 | #ifdef MODET |
dfcd3bfb JM |
1280 | if ((BITS (4, 11) & 0xF9) == 0x9) |
1281 | { | |
1282 | /* LDR register offset, no write-back, up, pre indexed */ | |
1283 | LHPREUP (); | |
1284 | /* continue with remaining instruction decoding */ | |
1285 | } | |
1286 | #endif | |
1287 | rhs = DPSRegRHS; | |
1288 | dest = LHS | rhs; | |
1289 | WRITESDEST (dest); | |
1290 | break; | |
1291 | ||
1292 | case 0x1a: /* MOV reg */ | |
c906108c | 1293 | #ifdef MODET |
dfcd3bfb JM |
1294 | if (BITS (4, 11) == 0xB) |
1295 | { | |
1296 | /* STRH register offset, write-back, up, pre indexed */ | |
1297 | SHPREUPWB (); | |
1298 | break; | |
1299 | } | |
1300 | #endif | |
1301 | dest = DPRegRHS; | |
1302 | WRITEDEST (dest); | |
1303 | break; | |
1304 | ||
1305 | case 0x1b: /* MOVS reg */ | |
c906108c | 1306 | #ifdef MODET |
dfcd3bfb JM |
1307 | if ((BITS (4, 11) & 0xF9) == 0x9) |
1308 | { | |
1309 | /* LDR register offset, write-back, up, pre indexed */ | |
1310 | LHPREUPWB (); | |
1311 | /* continue with remaining instruction decoding */ | |
1312 | } | |
1313 | #endif | |
1314 | dest = DPSRegRHS; | |
1315 | WRITESDEST (dest); | |
1316 | break; | |
1317 | ||
1318 | case 0x1c: /* BIC reg */ | |
c906108c | 1319 | #ifdef MODET |
dfcd3bfb JM |
1320 | if (BITS (4, 7) == 0xB) |
1321 | { | |
1322 | /* STRH immediate offset, no write-back, up, pre indexed */ | |
1323 | SHPREUP (); | |
1324 | break; | |
1325 | } | |
1326 | #endif | |
1327 | rhs = DPRegRHS; | |
1328 | dest = LHS & ~rhs; | |
1329 | WRITEDEST (dest); | |
1330 | break; | |
1331 | ||
1332 | case 0x1d: /* BICS reg */ | |
c906108c | 1333 | #ifdef MODET |
dfcd3bfb JM |
1334 | if ((BITS (4, 7) & 0x9) == 0x9) |
1335 | { | |
1336 | /* LDR immediate offset, no write-back, up, pre indexed */ | |
1337 | LHPREUP (); | |
1338 | /* continue with instruction decoding */ | |
1339 | } | |
1340 | #endif | |
1341 | rhs = DPSRegRHS; | |
1342 | dest = LHS & ~rhs; | |
1343 | WRITESDEST (dest); | |
1344 | break; | |
1345 | ||
1346 | case 0x1e: /* MVN reg */ | |
c906108c | 1347 | #ifdef MODET |
dfcd3bfb JM |
1348 | if (BITS (4, 7) == 0xB) |
1349 | { | |
1350 | /* STRH immediate offset, write-back, up, pre indexed */ | |
1351 | SHPREUPWB (); | |
1352 | break; | |
1353 | } | |
1354 | #endif | |
1355 | dest = ~DPRegRHS; | |
1356 | WRITEDEST (dest); | |
1357 | break; | |
1358 | ||
1359 | case 0x1f: /* MVNS reg */ | |
c906108c | 1360 | #ifdef MODET |
dfcd3bfb JM |
1361 | if ((BITS (4, 7) & 0x9) == 0x9) |
1362 | { | |
1363 | /* LDR immediate offset, write-back, up, pre indexed */ | |
1364 | LHPREUPWB (); | |
1365 | /* continue instruction decoding */ | |
1366 | } | |
c906108c | 1367 | #endif |
dfcd3bfb JM |
1368 | dest = ~DPSRegRHS; |
1369 | WRITESDEST (dest); | |
1370 | break; | |
c906108c SS |
1371 | |
1372 | /***************************************************************************\ | |
1373 | * Data Processing Immediate RHS Instructions * | |
1374 | \***************************************************************************/ | |
1375 | ||
dfcd3bfb JM |
1376 | case 0x20: /* AND immed */ |
1377 | dest = LHS & DPImmRHS; | |
1378 | WRITEDEST (dest); | |
1379 | break; | |
1380 | ||
1381 | case 0x21: /* ANDS immed */ | |
1382 | DPSImmRHS; | |
1383 | dest = LHS & rhs; | |
1384 | WRITESDEST (dest); | |
1385 | break; | |
1386 | ||
1387 | case 0x22: /* EOR immed */ | |
1388 | dest = LHS ^ DPImmRHS; | |
1389 | WRITEDEST (dest); | |
1390 | break; | |
1391 | ||
1392 | case 0x23: /* EORS immed */ | |
1393 | DPSImmRHS; | |
1394 | dest = LHS ^ rhs; | |
1395 | WRITESDEST (dest); | |
1396 | break; | |
1397 | ||
1398 | case 0x24: /* SUB immed */ | |
1399 | dest = LHS - DPImmRHS; | |
1400 | WRITEDEST (dest); | |
1401 | break; | |
1402 | ||
1403 | case 0x25: /* SUBS immed */ | |
1404 | lhs = LHS; | |
1405 | rhs = DPImmRHS; | |
1406 | dest = lhs - rhs; | |
1407 | if ((lhs >= rhs) || ((rhs | lhs) >> 31)) | |
1408 | { | |
1409 | ARMul_SubCarry (state, lhs, rhs, dest); | |
1410 | ARMul_SubOverflow (state, lhs, rhs, dest); | |
1411 | } | |
1412 | else | |
1413 | { | |
1414 | CLEARC; | |
1415 | CLEARV; | |
1416 | } | |
1417 | WRITESDEST (dest); | |
1418 | break; | |
1419 | ||
1420 | case 0x26: /* RSB immed */ | |
1421 | dest = DPImmRHS - LHS; | |
1422 | WRITEDEST (dest); | |
1423 | break; | |
1424 | ||
1425 | case 0x27: /* RSBS immed */ | |
1426 | lhs = LHS; | |
1427 | rhs = DPImmRHS; | |
1428 | dest = rhs - lhs; | |
1429 | if ((rhs >= lhs) || ((rhs | lhs) >> 31)) | |
1430 | { | |
1431 | ARMul_SubCarry (state, rhs, lhs, dest); | |
1432 | ARMul_SubOverflow (state, rhs, lhs, dest); | |
1433 | } | |
1434 | else | |
1435 | { | |
1436 | CLEARC; | |
1437 | CLEARV; | |
1438 | } | |
1439 | WRITESDEST (dest); | |
1440 | break; | |
1441 | ||
1442 | case 0x28: /* ADD immed */ | |
1443 | dest = LHS + DPImmRHS; | |
1444 | WRITEDEST (dest); | |
1445 | break; | |
1446 | ||
1447 | case 0x29: /* ADDS immed */ | |
1448 | lhs = LHS; | |
1449 | rhs = DPImmRHS; | |
1450 | dest = lhs + rhs; | |
1451 | ASSIGNZ (dest == 0); | |
1452 | if ((lhs | rhs) >> 30) | |
1453 | { /* possible C,V,N to set */ | |
1454 | ASSIGNN (NEG (dest)); | |
1455 | ARMul_AddCarry (state, lhs, rhs, dest); | |
1456 | ARMul_AddOverflow (state, lhs, rhs, dest); | |
1457 | } | |
1458 | else | |
1459 | { | |
1460 | CLEARN; | |
1461 | CLEARC; | |
1462 | CLEARV; | |
1463 | } | |
1464 | WRITESDEST (dest); | |
1465 | break; | |
1466 | ||
1467 | case 0x2a: /* ADC immed */ | |
1468 | dest = LHS + DPImmRHS + CFLAG; | |
1469 | WRITEDEST (dest); | |
1470 | break; | |
1471 | ||
1472 | case 0x2b: /* ADCS immed */ | |
1473 | lhs = LHS; | |
1474 | rhs = DPImmRHS; | |
1475 | dest = lhs + rhs + CFLAG; | |
1476 | ASSIGNZ (dest == 0); | |
1477 | if ((lhs | rhs) >> 30) | |
1478 | { /* possible C,V,N to set */ | |
1479 | ASSIGNN (NEG (dest)); | |
1480 | ARMul_AddCarry (state, lhs, rhs, dest); | |
1481 | ARMul_AddOverflow (state, lhs, rhs, dest); | |
1482 | } | |
1483 | else | |
1484 | { | |
1485 | CLEARN; | |
1486 | CLEARC; | |
1487 | CLEARV; | |
1488 | } | |
1489 | WRITESDEST (dest); | |
1490 | break; | |
1491 | ||
1492 | case 0x2c: /* SBC immed */ | |
1493 | dest = LHS - DPImmRHS - !CFLAG; | |
1494 | WRITEDEST (dest); | |
1495 | break; | |
1496 | ||
1497 | case 0x2d: /* SBCS immed */ | |
1498 | lhs = LHS; | |
1499 | rhs = DPImmRHS; | |
1500 | dest = lhs - rhs - !CFLAG; | |
1501 | if ((lhs >= rhs) || ((rhs | lhs) >> 31)) | |
1502 | { | |
1503 | ARMul_SubCarry (state, lhs, rhs, dest); | |
1504 | ARMul_SubOverflow (state, lhs, rhs, dest); | |
1505 | } | |
1506 | else | |
1507 | { | |
1508 | CLEARC; | |
1509 | CLEARV; | |
1510 | } | |
1511 | WRITESDEST (dest); | |
1512 | break; | |
1513 | ||
1514 | case 0x2e: /* RSC immed */ | |
1515 | dest = DPImmRHS - LHS - !CFLAG; | |
1516 | WRITEDEST (dest); | |
1517 | break; | |
1518 | ||
1519 | case 0x2f: /* RSCS immed */ | |
1520 | lhs = LHS; | |
1521 | rhs = DPImmRHS; | |
1522 | dest = rhs - lhs - !CFLAG; | |
1523 | if ((rhs >= lhs) || ((rhs | lhs) >> 31)) | |
1524 | { | |
1525 | ARMul_SubCarry (state, rhs, lhs, dest); | |
1526 | ARMul_SubOverflow (state, rhs, lhs, dest); | |
1527 | } | |
1528 | else | |
1529 | { | |
1530 | CLEARC; | |
1531 | CLEARV; | |
1532 | } | |
1533 | WRITESDEST (dest); | |
1534 | break; | |
1535 | ||
1536 | case 0x30: /* TST immed */ | |
1537 | UNDEF_Test; | |
1538 | break; | |
1539 | ||
1540 | case 0x31: /* TSTP immed */ | |
1541 | if (DESTReg == 15) | |
1542 | { /* TSTP immed */ | |
c906108c | 1543 | #ifdef MODE32 |
dfcd3bfb JM |
1544 | state->Cpsr = GETSPSR (state->Bank); |
1545 | ARMul_CPSRAltered (state); | |
c906108c | 1546 | #else |
dfcd3bfb JM |
1547 | temp = LHS & DPImmRHS; |
1548 | SETR15PSR (temp); | |
1549 | #endif | |
1550 | } | |
1551 | else | |
1552 | { | |
1553 | DPSImmRHS; /* TST immed */ | |
1554 | dest = LHS & rhs; | |
1555 | ARMul_NegZero (state, dest); | |
1556 | } | |
1557 | break; | |
1558 | ||
1559 | case 0x32: /* TEQ immed and MSR immed to CPSR */ | |
4ef2594f | 1560 | if (DESTReg == 15) |
dfcd3bfb JM |
1561 | { /* MSR immed to CPSR */ |
1562 | ARMul_FixCPSR (state, instr, DPImmRHS); | |
1563 | } | |
1564 | else | |
1565 | { | |
1566 | UNDEF_Test; | |
1567 | } | |
1568 | break; | |
1569 | ||
1570 | case 0x33: /* TEQP immed */ | |
1571 | if (DESTReg == 15) | |
1572 | { /* TEQP immed */ | |
c906108c | 1573 | #ifdef MODE32 |
dfcd3bfb JM |
1574 | state->Cpsr = GETSPSR (state->Bank); |
1575 | ARMul_CPSRAltered (state); | |
c906108c | 1576 | #else |
dfcd3bfb JM |
1577 | temp = LHS ^ DPImmRHS; |
1578 | SETR15PSR (temp); | |
1579 | #endif | |
1580 | } | |
1581 | else | |
1582 | { | |
1583 | DPSImmRHS; /* TEQ immed */ | |
1584 | dest = LHS ^ rhs; | |
1585 | ARMul_NegZero (state, dest); | |
1586 | } | |
1587 | break; | |
1588 | ||
1589 | case 0x34: /* CMP immed */ | |
1590 | UNDEF_Test; | |
1591 | break; | |
1592 | ||
1593 | case 0x35: /* CMPP immed */ | |
1594 | if (DESTReg == 15) | |
1595 | { /* CMPP immed */ | |
c906108c | 1596 | #ifdef MODE32 |
dfcd3bfb JM |
1597 | state->Cpsr = GETSPSR (state->Bank); |
1598 | ARMul_CPSRAltered (state); | |
c906108c | 1599 | #else |
dfcd3bfb JM |
1600 | temp = LHS - DPImmRHS; |
1601 | SETR15PSR (temp); | |
1602 | #endif | |
1603 | break; | |
1604 | } | |
1605 | else | |
1606 | { | |
1607 | lhs = LHS; /* CMP immed */ | |
1608 | rhs = DPImmRHS; | |
1609 | dest = lhs - rhs; | |
1610 | ARMul_NegZero (state, dest); | |
1611 | if ((lhs >= rhs) || ((rhs | lhs) >> 31)) | |
1612 | { | |
1613 | ARMul_SubCarry (state, lhs, rhs, dest); | |
1614 | ARMul_SubOverflow (state, lhs, rhs, dest); | |
1615 | } | |
1616 | else | |
1617 | { | |
1618 | CLEARC; | |
1619 | CLEARV; | |
1620 | } | |
1621 | } | |
1622 | break; | |
1623 | ||
1624 | case 0x36: /* CMN immed and MSR immed to SPSR */ | |
4ef2594f | 1625 | if (DESTReg == 15) /* MSR */ |
dfcd3bfb JM |
1626 | ARMul_FixSPSR (state, instr, DPImmRHS); |
1627 | else | |
1628 | { | |
1629 | UNDEF_Test; | |
1630 | } | |
1631 | break; | |
1632 | ||
1633 | case 0x37: /* CMNP immed */ | |
1634 | if (DESTReg == 15) | |
1635 | { /* CMNP immed */ | |
c906108c | 1636 | #ifdef MODE32 |
dfcd3bfb JM |
1637 | state->Cpsr = GETSPSR (state->Bank); |
1638 | ARMul_CPSRAltered (state); | |
c906108c | 1639 | #else |
dfcd3bfb JM |
1640 | temp = LHS + DPImmRHS; |
1641 | SETR15PSR (temp); | |
1642 | #endif | |
1643 | break; | |
1644 | } | |
1645 | else | |
1646 | { | |
1647 | lhs = LHS; /* CMN immed */ | |
1648 | rhs = DPImmRHS; | |
1649 | dest = lhs + rhs; | |
1650 | ASSIGNZ (dest == 0); | |
1651 | if ((lhs | rhs) >> 30) | |
1652 | { /* possible C,V,N to set */ | |
1653 | ASSIGNN (NEG (dest)); | |
1654 | ARMul_AddCarry (state, lhs, rhs, dest); | |
1655 | ARMul_AddOverflow (state, lhs, rhs, dest); | |
1656 | } | |
1657 | else | |
1658 | { | |
1659 | CLEARN; | |
1660 | CLEARC; | |
1661 | CLEARV; | |
1662 | } | |
1663 | } | |
1664 | break; | |
1665 | ||
1666 | case 0x38: /* ORR immed */ | |
1667 | dest = LHS | DPImmRHS; | |
1668 | WRITEDEST (dest); | |
1669 | break; | |
1670 | ||
1671 | case 0x39: /* ORRS immed */ | |
1672 | DPSImmRHS; | |
1673 | dest = LHS | rhs; | |
1674 | WRITESDEST (dest); | |
1675 | break; | |
1676 | ||
1677 | case 0x3a: /* MOV immed */ | |
1678 | dest = DPImmRHS; | |
1679 | WRITEDEST (dest); | |
1680 | break; | |
1681 | ||
1682 | case 0x3b: /* MOVS immed */ | |
1683 | DPSImmRHS; | |
1684 | WRITESDEST (rhs); | |
1685 | break; | |
1686 | ||
1687 | case 0x3c: /* BIC immed */ | |
1688 | dest = LHS & ~DPImmRHS; | |
1689 | WRITEDEST (dest); | |
1690 | break; | |
1691 | ||
1692 | case 0x3d: /* BICS immed */ | |
1693 | DPSImmRHS; | |
1694 | dest = LHS & ~rhs; | |
1695 | WRITESDEST (dest); | |
1696 | break; | |
1697 | ||
1698 | case 0x3e: /* MVN immed */ | |
1699 | dest = ~DPImmRHS; | |
1700 | WRITEDEST (dest); | |
1701 | break; | |
1702 | ||
1703 | case 0x3f: /* MVNS immed */ | |
1704 | DPSImmRHS; | |
1705 | WRITESDEST (~rhs); | |
1706 | break; | |
c906108c SS |
1707 | |
1708 | /***************************************************************************\ | |
1709 | * Single Data Transfer Immediate RHS Instructions * | |
1710 | \***************************************************************************/ | |
1711 | ||
dfcd3bfb JM |
1712 | case 0x40: /* Store Word, No WriteBack, Post Dec, Immed */ |
1713 | lhs = LHS; | |
1714 | if (StoreWord (state, instr, lhs)) | |
1715 | LSBase = lhs - LSImmRHS; | |
1716 | break; | |
1717 | ||
1718 | case 0x41: /* Load Word, No WriteBack, Post Dec, Immed */ | |
1719 | lhs = LHS; | |
1720 | if (LoadWord (state, instr, lhs)) | |
1721 | LSBase = lhs - LSImmRHS; | |
1722 | break; | |
1723 | ||
1724 | case 0x42: /* Store Word, WriteBack, Post Dec, Immed */ | |
1725 | UNDEF_LSRBaseEQDestWb; | |
1726 | UNDEF_LSRPCBaseWb; | |
1727 | lhs = LHS; | |
1728 | temp = lhs - LSImmRHS; | |
1729 | state->NtransSig = LOW; | |
1730 | if (StoreWord (state, instr, lhs)) | |
1731 | LSBase = temp; | |
1732 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1733 | break; | |
1734 | ||
1735 | case 0x43: /* Load Word, WriteBack, Post Dec, Immed */ | |
1736 | UNDEF_LSRBaseEQDestWb; | |
1737 | UNDEF_LSRPCBaseWb; | |
1738 | lhs = LHS; | |
1739 | state->NtransSig = LOW; | |
1740 | if (LoadWord (state, instr, lhs)) | |
1741 | LSBase = lhs - LSImmRHS; | |
1742 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1743 | break; | |
1744 | ||
1745 | case 0x44: /* Store Byte, No WriteBack, Post Dec, Immed */ | |
1746 | lhs = LHS; | |
1747 | if (StoreByte (state, instr, lhs)) | |
1748 | LSBase = lhs - LSImmRHS; | |
1749 | break; | |
1750 | ||
1751 | case 0x45: /* Load Byte, No WriteBack, Post Dec, Immed */ | |
1752 | lhs = LHS; | |
1753 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
1754 | LSBase = lhs - LSImmRHS; | |
1755 | break; | |
1756 | ||
1757 | case 0x46: /* Store Byte, WriteBack, Post Dec, Immed */ | |
1758 | UNDEF_LSRBaseEQDestWb; | |
1759 | UNDEF_LSRPCBaseWb; | |
1760 | lhs = LHS; | |
1761 | state->NtransSig = LOW; | |
1762 | if (StoreByte (state, instr, lhs)) | |
1763 | LSBase = lhs - LSImmRHS; | |
1764 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1765 | break; | |
1766 | ||
1767 | case 0x47: /* Load Byte, WriteBack, Post Dec, Immed */ | |
1768 | UNDEF_LSRBaseEQDestWb; | |
1769 | UNDEF_LSRPCBaseWb; | |
1770 | lhs = LHS; | |
1771 | state->NtransSig = LOW; | |
1772 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
1773 | LSBase = lhs - LSImmRHS; | |
1774 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1775 | break; | |
1776 | ||
1777 | case 0x48: /* Store Word, No WriteBack, Post Inc, Immed */ | |
1778 | lhs = LHS; | |
1779 | if (StoreWord (state, instr, lhs)) | |
1780 | LSBase = lhs + LSImmRHS; | |
1781 | break; | |
1782 | ||
1783 | case 0x49: /* Load Word, No WriteBack, Post Inc, Immed */ | |
1784 | lhs = LHS; | |
1785 | if (LoadWord (state, instr, lhs)) | |
1786 | LSBase = lhs + LSImmRHS; | |
1787 | break; | |
1788 | ||
1789 | case 0x4a: /* Store Word, WriteBack, Post Inc, Immed */ | |
1790 | UNDEF_LSRBaseEQDestWb; | |
1791 | UNDEF_LSRPCBaseWb; | |
1792 | lhs = LHS; | |
1793 | state->NtransSig = LOW; | |
1794 | if (StoreWord (state, instr, lhs)) | |
1795 | LSBase = lhs + LSImmRHS; | |
1796 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1797 | break; | |
1798 | ||
1799 | case 0x4b: /* Load Word, WriteBack, Post Inc, Immed */ | |
1800 | UNDEF_LSRBaseEQDestWb; | |
1801 | UNDEF_LSRPCBaseWb; | |
1802 | lhs = LHS; | |
1803 | state->NtransSig = LOW; | |
1804 | if (LoadWord (state, instr, lhs)) | |
1805 | LSBase = lhs + LSImmRHS; | |
1806 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1807 | break; | |
1808 | ||
1809 | case 0x4c: /* Store Byte, No WriteBack, Post Inc, Immed */ | |
1810 | lhs = LHS; | |
1811 | if (StoreByte (state, instr, lhs)) | |
1812 | LSBase = lhs + LSImmRHS; | |
1813 | break; | |
1814 | ||
1815 | case 0x4d: /* Load Byte, No WriteBack, Post Inc, Immed */ | |
1816 | lhs = LHS; | |
1817 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
1818 | LSBase = lhs + LSImmRHS; | |
1819 | break; | |
1820 | ||
1821 | case 0x4e: /* Store Byte, WriteBack, Post Inc, Immed */ | |
1822 | UNDEF_LSRBaseEQDestWb; | |
1823 | UNDEF_LSRPCBaseWb; | |
1824 | lhs = LHS; | |
1825 | state->NtransSig = LOW; | |
1826 | if (StoreByte (state, instr, lhs)) | |
1827 | LSBase = lhs + LSImmRHS; | |
1828 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1829 | break; | |
1830 | ||
1831 | case 0x4f: /* Load Byte, WriteBack, Post Inc, Immed */ | |
1832 | UNDEF_LSRBaseEQDestWb; | |
1833 | UNDEF_LSRPCBaseWb; | |
1834 | lhs = LHS; | |
1835 | state->NtransSig = LOW; | |
1836 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
1837 | LSBase = lhs + LSImmRHS; | |
1838 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1839 | break; | |
1840 | ||
1841 | ||
1842 | case 0x50: /* Store Word, No WriteBack, Pre Dec, Immed */ | |
1843 | (void) StoreWord (state, instr, LHS - LSImmRHS); | |
1844 | break; | |
1845 | ||
1846 | case 0x51: /* Load Word, No WriteBack, Pre Dec, Immed */ | |
1847 | (void) LoadWord (state, instr, LHS - LSImmRHS); | |
1848 | break; | |
1849 | ||
1850 | case 0x52: /* Store Word, WriteBack, Pre Dec, Immed */ | |
1851 | UNDEF_LSRBaseEQDestWb; | |
1852 | UNDEF_LSRPCBaseWb; | |
1853 | temp = LHS - LSImmRHS; | |
1854 | if (StoreWord (state, instr, temp)) | |
1855 | LSBase = temp; | |
1856 | break; | |
1857 | ||
1858 | case 0x53: /* Load Word, WriteBack, Pre Dec, Immed */ | |
1859 | UNDEF_LSRBaseEQDestWb; | |
1860 | UNDEF_LSRPCBaseWb; | |
1861 | temp = LHS - LSImmRHS; | |
1862 | if (LoadWord (state, instr, temp)) | |
1863 | LSBase = temp; | |
1864 | break; | |
1865 | ||
1866 | case 0x54: /* Store Byte, No WriteBack, Pre Dec, Immed */ | |
1867 | (void) StoreByte (state, instr, LHS - LSImmRHS); | |
1868 | break; | |
1869 | ||
1870 | case 0x55: /* Load Byte, No WriteBack, Pre Dec, Immed */ | |
1871 | (void) LoadByte (state, instr, LHS - LSImmRHS, LUNSIGNED); | |
1872 | break; | |
1873 | ||
1874 | case 0x56: /* Store Byte, WriteBack, Pre Dec, Immed */ | |
1875 | UNDEF_LSRBaseEQDestWb; | |
1876 | UNDEF_LSRPCBaseWb; | |
1877 | temp = LHS - LSImmRHS; | |
1878 | if (StoreByte (state, instr, temp)) | |
1879 | LSBase = temp; | |
1880 | break; | |
1881 | ||
1882 | case 0x57: /* Load Byte, WriteBack, Pre Dec, Immed */ | |
1883 | UNDEF_LSRBaseEQDestWb; | |
1884 | UNDEF_LSRPCBaseWb; | |
1885 | temp = LHS - LSImmRHS; | |
1886 | if (LoadByte (state, instr, temp, LUNSIGNED)) | |
1887 | LSBase = temp; | |
1888 | break; | |
1889 | ||
1890 | case 0x58: /* Store Word, No WriteBack, Pre Inc, Immed */ | |
1891 | (void) StoreWord (state, instr, LHS + LSImmRHS); | |
1892 | break; | |
1893 | ||
1894 | case 0x59: /* Load Word, No WriteBack, Pre Inc, Immed */ | |
1895 | (void) LoadWord (state, instr, LHS + LSImmRHS); | |
1896 | break; | |
1897 | ||
1898 | case 0x5a: /* Store Word, WriteBack, Pre Inc, Immed */ | |
1899 | UNDEF_LSRBaseEQDestWb; | |
1900 | UNDEF_LSRPCBaseWb; | |
1901 | temp = LHS + LSImmRHS; | |
1902 | if (StoreWord (state, instr, temp)) | |
1903 | LSBase = temp; | |
1904 | break; | |
1905 | ||
1906 | case 0x5b: /* Load Word, WriteBack, Pre Inc, Immed */ | |
1907 | UNDEF_LSRBaseEQDestWb; | |
1908 | UNDEF_LSRPCBaseWb; | |
1909 | temp = LHS + LSImmRHS; | |
1910 | if (LoadWord (state, instr, temp)) | |
1911 | LSBase = temp; | |
1912 | break; | |
1913 | ||
1914 | case 0x5c: /* Store Byte, No WriteBack, Pre Inc, Immed */ | |
1915 | (void) StoreByte (state, instr, LHS + LSImmRHS); | |
1916 | break; | |
1917 | ||
1918 | case 0x5d: /* Load Byte, No WriteBack, Pre Inc, Immed */ | |
1919 | (void) LoadByte (state, instr, LHS + LSImmRHS, LUNSIGNED); | |
1920 | break; | |
1921 | ||
1922 | case 0x5e: /* Store Byte, WriteBack, Pre Inc, Immed */ | |
1923 | UNDEF_LSRBaseEQDestWb; | |
1924 | UNDEF_LSRPCBaseWb; | |
1925 | temp = LHS + LSImmRHS; | |
1926 | if (StoreByte (state, instr, temp)) | |
1927 | LSBase = temp; | |
1928 | break; | |
1929 | ||
1930 | case 0x5f: /* Load Byte, WriteBack, Pre Inc, Immed */ | |
1931 | UNDEF_LSRBaseEQDestWb; | |
1932 | UNDEF_LSRPCBaseWb; | |
1933 | temp = LHS + LSImmRHS; | |
1934 | if (LoadByte (state, instr, temp, LUNSIGNED)) | |
1935 | LSBase = temp; | |
1936 | break; | |
c906108c SS |
1937 | |
1938 | /***************************************************************************\ | |
1939 | * Single Data Transfer Register RHS Instructions * | |
1940 | \***************************************************************************/ | |
1941 | ||
dfcd3bfb JM |
1942 | case 0x60: /* Store Word, No WriteBack, Post Dec, Reg */ |
1943 | if (BIT (4)) | |
1944 | { | |
1945 | ARMul_UndefInstr (state, instr); | |
1946 | break; | |
1947 | } | |
1948 | UNDEF_LSRBaseEQOffWb; | |
1949 | UNDEF_LSRBaseEQDestWb; | |
1950 | UNDEF_LSRPCBaseWb; | |
1951 | UNDEF_LSRPCOffWb; | |
1952 | lhs = LHS; | |
1953 | if (StoreWord (state, instr, lhs)) | |
1954 | LSBase = lhs - LSRegRHS; | |
1955 | break; | |
1956 | ||
1957 | case 0x61: /* Load Word, No WriteBack, Post Dec, Reg */ | |
1958 | if (BIT (4)) | |
1959 | { | |
1960 | ARMul_UndefInstr (state, instr); | |
1961 | break; | |
1962 | } | |
1963 | UNDEF_LSRBaseEQOffWb; | |
1964 | UNDEF_LSRBaseEQDestWb; | |
1965 | UNDEF_LSRPCBaseWb; | |
1966 | UNDEF_LSRPCOffWb; | |
1967 | lhs = LHS; | |
e62263b8 | 1968 | temp = lhs - LSRegRHS; |
dfcd3bfb | 1969 | if (LoadWord (state, instr, lhs)) |
e62263b8 | 1970 | LSBase = temp; |
dfcd3bfb JM |
1971 | break; |
1972 | ||
1973 | case 0x62: /* Store Word, WriteBack, Post Dec, Reg */ | |
1974 | if (BIT (4)) | |
1975 | { | |
1976 | ARMul_UndefInstr (state, instr); | |
1977 | break; | |
1978 | } | |
1979 | UNDEF_LSRBaseEQOffWb; | |
1980 | UNDEF_LSRBaseEQDestWb; | |
1981 | UNDEF_LSRPCBaseWb; | |
1982 | UNDEF_LSRPCOffWb; | |
1983 | lhs = LHS; | |
1984 | state->NtransSig = LOW; | |
1985 | if (StoreWord (state, instr, lhs)) | |
1986 | LSBase = lhs - LSRegRHS; | |
1987 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1988 | break; | |
1989 | ||
1990 | case 0x63: /* Load Word, WriteBack, Post Dec, Reg */ | |
1991 | if (BIT (4)) | |
1992 | { | |
1993 | ARMul_UndefInstr (state, instr); | |
1994 | break; | |
1995 | } | |
1996 | UNDEF_LSRBaseEQOffWb; | |
1997 | UNDEF_LSRBaseEQDestWb; | |
1998 | UNDEF_LSRPCBaseWb; | |
1999 | UNDEF_LSRPCOffWb; | |
2000 | lhs = LHS; | |
e62263b8 | 2001 | temp = lhs - LSRegRHS; |
dfcd3bfb JM |
2002 | state->NtransSig = LOW; |
2003 | if (LoadWord (state, instr, lhs)) | |
e62263b8 | 2004 | LSBase = temp; |
dfcd3bfb JM |
2005 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; |
2006 | break; | |
2007 | ||
2008 | case 0x64: /* Store Byte, No WriteBack, Post Dec, Reg */ | |
2009 | if (BIT (4)) | |
2010 | { | |
2011 | ARMul_UndefInstr (state, instr); | |
2012 | break; | |
2013 | } | |
2014 | UNDEF_LSRBaseEQOffWb; | |
2015 | UNDEF_LSRBaseEQDestWb; | |
2016 | UNDEF_LSRPCBaseWb; | |
2017 | UNDEF_LSRPCOffWb; | |
2018 | lhs = LHS; | |
2019 | if (StoreByte (state, instr, lhs)) | |
2020 | LSBase = lhs - LSRegRHS; | |
2021 | break; | |
2022 | ||
2023 | case 0x65: /* Load Byte, No WriteBack, Post Dec, Reg */ | |
2024 | if (BIT (4)) | |
2025 | { | |
2026 | ARMul_UndefInstr (state, instr); | |
2027 | break; | |
2028 | } | |
2029 | UNDEF_LSRBaseEQOffWb; | |
2030 | UNDEF_LSRBaseEQDestWb; | |
2031 | UNDEF_LSRPCBaseWb; | |
2032 | UNDEF_LSRPCOffWb; | |
2033 | lhs = LHS; | |
e62263b8 | 2034 | temp = lhs - LSRegRHS; |
dfcd3bfb | 2035 | if (LoadByte (state, instr, lhs, LUNSIGNED)) |
e62263b8 | 2036 | LSBase = temp; |
dfcd3bfb JM |
2037 | break; |
2038 | ||
2039 | case 0x66: /* Store Byte, WriteBack, Post Dec, Reg */ | |
2040 | if (BIT (4)) | |
2041 | { | |
2042 | ARMul_UndefInstr (state, instr); | |
2043 | break; | |
2044 | } | |
2045 | UNDEF_LSRBaseEQOffWb; | |
2046 | UNDEF_LSRBaseEQDestWb; | |
2047 | UNDEF_LSRPCBaseWb; | |
2048 | UNDEF_LSRPCOffWb; | |
2049 | lhs = LHS; | |
2050 | state->NtransSig = LOW; | |
2051 | if (StoreByte (state, instr, lhs)) | |
2052 | LSBase = lhs - LSRegRHS; | |
2053 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
2054 | break; | |
2055 | ||
2056 | case 0x67: /* Load Byte, WriteBack, Post Dec, Reg */ | |
2057 | if (BIT (4)) | |
2058 | { | |
2059 | ARMul_UndefInstr (state, instr); | |
2060 | break; | |
2061 | } | |
2062 | UNDEF_LSRBaseEQOffWb; | |
2063 | UNDEF_LSRBaseEQDestWb; | |
2064 | UNDEF_LSRPCBaseWb; | |
2065 | UNDEF_LSRPCOffWb; | |
2066 | lhs = LHS; | |
e62263b8 | 2067 | temp = lhs - LSRegRHS; |
dfcd3bfb JM |
2068 | state->NtransSig = LOW; |
2069 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
e62263b8 | 2070 | LSBase = temp; |
dfcd3bfb JM |
2071 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; |
2072 | break; | |
2073 | ||
2074 | case 0x68: /* Store Word, No WriteBack, Post Inc, Reg */ | |
2075 | if (BIT (4)) | |
2076 | { | |
2077 | ARMul_UndefInstr (state, instr); | |
2078 | break; | |
2079 | } | |
2080 | UNDEF_LSRBaseEQOffWb; | |
2081 | UNDEF_LSRBaseEQDestWb; | |
2082 | UNDEF_LSRPCBaseWb; | |
2083 | UNDEF_LSRPCOffWb; | |
2084 | lhs = LHS; | |
2085 | if (StoreWord (state, instr, lhs)) | |
2086 | LSBase = lhs + LSRegRHS; | |
2087 | break; | |
2088 | ||
2089 | case 0x69: /* Load Word, No WriteBack, Post Inc, Reg */ | |
2090 | if (BIT (4)) | |
2091 | { | |
2092 | ARMul_UndefInstr (state, instr); | |
2093 | break; | |
2094 | } | |
2095 | UNDEF_LSRBaseEQOffWb; | |
2096 | UNDEF_LSRBaseEQDestWb; | |
2097 | UNDEF_LSRPCBaseWb; | |
2098 | UNDEF_LSRPCOffWb; | |
2099 | lhs = LHS; | |
e62263b8 | 2100 | temp = lhs + LSRegRHS; |
dfcd3bfb | 2101 | if (LoadWord (state, instr, lhs)) |
e62263b8 | 2102 | LSBase = temp; |
dfcd3bfb JM |
2103 | break; |
2104 | ||
2105 | case 0x6a: /* Store Word, WriteBack, Post Inc, Reg */ | |
2106 | if (BIT (4)) | |
2107 | { | |
2108 | ARMul_UndefInstr (state, instr); | |
2109 | break; | |
2110 | } | |
2111 | UNDEF_LSRBaseEQOffWb; | |
2112 | UNDEF_LSRBaseEQDestWb; | |
2113 | UNDEF_LSRPCBaseWb; | |
2114 | UNDEF_LSRPCOffWb; | |
2115 | lhs = LHS; | |
2116 | state->NtransSig = LOW; | |
2117 | if (StoreWord (state, instr, lhs)) | |
2118 | LSBase = lhs + LSRegRHS; | |
2119 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
2120 | break; | |
2121 | ||
2122 | case 0x6b: /* Load Word, WriteBack, Post Inc, Reg */ | |
2123 | if (BIT (4)) | |
2124 | { | |
2125 | ARMul_UndefInstr (state, instr); | |
2126 | break; | |
2127 | } | |
2128 | UNDEF_LSRBaseEQOffWb; | |
2129 | UNDEF_LSRBaseEQDestWb; | |
2130 | UNDEF_LSRPCBaseWb; | |
2131 | UNDEF_LSRPCOffWb; | |
2132 | lhs = LHS; | |
e62263b8 | 2133 | temp = lhs + LSRegRHS; |
dfcd3bfb JM |
2134 | state->NtransSig = LOW; |
2135 | if (LoadWord (state, instr, lhs)) | |
e62263b8 | 2136 | LSBase = temp; |
dfcd3bfb JM |
2137 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; |
2138 | break; | |
2139 | ||
2140 | case 0x6c: /* Store Byte, No WriteBack, Post Inc, Reg */ | |
2141 | if (BIT (4)) | |
2142 | { | |
2143 | ARMul_UndefInstr (state, instr); | |
2144 | break; | |
2145 | } | |
2146 | UNDEF_LSRBaseEQOffWb; | |
2147 | UNDEF_LSRBaseEQDestWb; | |
2148 | UNDEF_LSRPCBaseWb; | |
2149 | UNDEF_LSRPCOffWb; | |
2150 | lhs = LHS; | |
2151 | if (StoreByte (state, instr, lhs)) | |
2152 | LSBase = lhs + LSRegRHS; | |
2153 | break; | |
2154 | ||
2155 | case 0x6d: /* Load Byte, No WriteBack, Post Inc, Reg */ | |
2156 | if (BIT (4)) | |
2157 | { | |
2158 | ARMul_UndefInstr (state, instr); | |
2159 | break; | |
2160 | } | |
2161 | UNDEF_LSRBaseEQOffWb; | |
2162 | UNDEF_LSRBaseEQDestWb; | |
2163 | UNDEF_LSRPCBaseWb; | |
2164 | UNDEF_LSRPCOffWb; | |
2165 | lhs = LHS; | |
e62263b8 | 2166 | temp = lhs + LSRegRHS; |
dfcd3bfb | 2167 | if (LoadByte (state, instr, lhs, LUNSIGNED)) |
e62263b8 | 2168 | LSBase = temp; |
dfcd3bfb JM |
2169 | break; |
2170 | ||
2171 | case 0x6e: /* Store Byte, WriteBack, Post Inc, Reg */ | |
2172 | if (BIT (4)) | |
2173 | { | |
2174 | ARMul_UndefInstr (state, instr); | |
2175 | break; | |
2176 | } | |
2177 | UNDEF_LSRBaseEQOffWb; | |
2178 | UNDEF_LSRBaseEQDestWb; | |
2179 | UNDEF_LSRPCBaseWb; | |
2180 | UNDEF_LSRPCOffWb; | |
2181 | lhs = LHS; | |
2182 | state->NtransSig = LOW; | |
2183 | if (StoreByte (state, instr, lhs)) | |
2184 | LSBase = lhs + LSRegRHS; | |
2185 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
2186 | break; | |
2187 | ||
2188 | case 0x6f: /* Load Byte, WriteBack, Post Inc, Reg */ | |
2189 | if (BIT (4)) | |
2190 | { | |
2191 | ARMul_UndefInstr (state, instr); | |
2192 | break; | |
2193 | } | |
2194 | UNDEF_LSRBaseEQOffWb; | |
2195 | UNDEF_LSRBaseEQDestWb; | |
2196 | UNDEF_LSRPCBaseWb; | |
2197 | UNDEF_LSRPCOffWb; | |
2198 | lhs = LHS; | |
e62263b8 | 2199 | temp = lhs + LSRegRHS; |
dfcd3bfb JM |
2200 | state->NtransSig = LOW; |
2201 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
e62263b8 | 2202 | LSBase = temp; |
dfcd3bfb JM |
2203 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; |
2204 | break; | |
2205 | ||
2206 | ||
2207 | case 0x70: /* Store Word, No WriteBack, Pre Dec, Reg */ | |
2208 | if (BIT (4)) | |
2209 | { | |
2210 | ARMul_UndefInstr (state, instr); | |
2211 | break; | |
2212 | } | |
2213 | (void) StoreWord (state, instr, LHS - LSRegRHS); | |
2214 | break; | |
2215 | ||
2216 | case 0x71: /* Load Word, No WriteBack, Pre Dec, Reg */ | |
2217 | if (BIT (4)) | |
2218 | { | |
2219 | ARMul_UndefInstr (state, instr); | |
2220 | break; | |
2221 | } | |
2222 | (void) LoadWord (state, instr, LHS - LSRegRHS); | |
2223 | break; | |
2224 | ||
2225 | case 0x72: /* Store Word, WriteBack, Pre Dec, Reg */ | |
2226 | if (BIT (4)) | |
2227 | { | |
2228 | ARMul_UndefInstr (state, instr); | |
2229 | break; | |
2230 | } | |
2231 | UNDEF_LSRBaseEQOffWb; | |
2232 | UNDEF_LSRBaseEQDestWb; | |
2233 | UNDEF_LSRPCBaseWb; | |
2234 | UNDEF_LSRPCOffWb; | |
2235 | temp = LHS - LSRegRHS; | |
2236 | if (StoreWord (state, instr, temp)) | |
2237 | LSBase = temp; | |
2238 | break; | |
2239 | ||
2240 | case 0x73: /* Load Word, WriteBack, Pre Dec, Reg */ | |
2241 | if (BIT (4)) | |
2242 | { | |
2243 | ARMul_UndefInstr (state, instr); | |
2244 | break; | |
2245 | } | |
2246 | UNDEF_LSRBaseEQOffWb; | |
2247 | UNDEF_LSRBaseEQDestWb; | |
2248 | UNDEF_LSRPCBaseWb; | |
2249 | UNDEF_LSRPCOffWb; | |
2250 | temp = LHS - LSRegRHS; | |
2251 | if (LoadWord (state, instr, temp)) | |
2252 | LSBase = temp; | |
2253 | break; | |
2254 | ||
2255 | case 0x74: /* Store Byte, No WriteBack, Pre Dec, Reg */ | |
2256 | if (BIT (4)) | |
2257 | { | |
2258 | ARMul_UndefInstr (state, instr); | |
2259 | break; | |
2260 | } | |
2261 | (void) StoreByte (state, instr, LHS - LSRegRHS); | |
2262 | break; | |
2263 | ||
2264 | case 0x75: /* Load Byte, No WriteBack, Pre Dec, Reg */ | |
2265 | if (BIT (4)) | |
2266 | { | |
2267 | ARMul_UndefInstr (state, instr); | |
2268 | break; | |
2269 | } | |
2270 | (void) LoadByte (state, instr, LHS - LSRegRHS, LUNSIGNED); | |
2271 | break; | |
2272 | ||
2273 | case 0x76: /* Store Byte, WriteBack, Pre Dec, Reg */ | |
2274 | if (BIT (4)) | |
2275 | { | |
2276 | ARMul_UndefInstr (state, instr); | |
2277 | break; | |
2278 | } | |
2279 | UNDEF_LSRBaseEQOffWb; | |
2280 | UNDEF_LSRBaseEQDestWb; | |
2281 | UNDEF_LSRPCBaseWb; | |
2282 | UNDEF_LSRPCOffWb; | |
2283 | temp = LHS - LSRegRHS; | |
2284 | if (StoreByte (state, instr, temp)) | |
2285 | LSBase = temp; | |
2286 | break; | |
2287 | ||
2288 | case 0x77: /* Load Byte, WriteBack, Pre Dec, Reg */ | |
2289 | if (BIT (4)) | |
2290 | { | |
2291 | ARMul_UndefInstr (state, instr); | |
2292 | break; | |
2293 | } | |
2294 | UNDEF_LSRBaseEQOffWb; | |
2295 | UNDEF_LSRBaseEQDestWb; | |
2296 | UNDEF_LSRPCBaseWb; | |
2297 | UNDEF_LSRPCOffWb; | |
2298 | temp = LHS - LSRegRHS; | |
2299 | if (LoadByte (state, instr, temp, LUNSIGNED)) | |
2300 | LSBase = temp; | |
2301 | break; | |
2302 | ||
2303 | case 0x78: /* Store Word, No WriteBack, Pre Inc, Reg */ | |
2304 | if (BIT (4)) | |
2305 | { | |
2306 | ARMul_UndefInstr (state, instr); | |
2307 | break; | |
2308 | } | |
2309 | (void) StoreWord (state, instr, LHS + LSRegRHS); | |
2310 | break; | |
2311 | ||
2312 | case 0x79: /* Load Word, No WriteBack, Pre Inc, Reg */ | |
2313 | if (BIT (4)) | |
2314 | { | |
2315 | ARMul_UndefInstr (state, instr); | |
2316 | break; | |
2317 | } | |
2318 | (void) LoadWord (state, instr, LHS + LSRegRHS); | |
2319 | break; | |
2320 | ||
2321 | case 0x7a: /* Store Word, WriteBack, Pre Inc, Reg */ | |
2322 | if (BIT (4)) | |
2323 | { | |
2324 | ARMul_UndefInstr (state, instr); | |
2325 | break; | |
2326 | } | |
2327 | UNDEF_LSRBaseEQOffWb; | |
2328 | UNDEF_LSRBaseEQDestWb; | |
2329 | UNDEF_LSRPCBaseWb; | |
2330 | UNDEF_LSRPCOffWb; | |
2331 | temp = LHS + LSRegRHS; | |
2332 | if (StoreWord (state, instr, temp)) | |
2333 | LSBase = temp; | |
2334 | break; | |
2335 | ||
2336 | case 0x7b: /* Load Word, WriteBack, Pre Inc, Reg */ | |
2337 | if (BIT (4)) | |
2338 | { | |
2339 | ARMul_UndefInstr (state, instr); | |
2340 | break; | |
2341 | } | |
2342 | UNDEF_LSRBaseEQOffWb; | |
2343 | UNDEF_LSRBaseEQDestWb; | |
2344 | UNDEF_LSRPCBaseWb; | |
2345 | UNDEF_LSRPCOffWb; | |
2346 | temp = LHS + LSRegRHS; | |
2347 | if (LoadWord (state, instr, temp)) | |
2348 | LSBase = temp; | |
2349 | break; | |
2350 | ||
2351 | case 0x7c: /* Store Byte, No WriteBack, Pre Inc, Reg */ | |
2352 | if (BIT (4)) | |
2353 | { | |
2354 | ARMul_UndefInstr (state, instr); | |
2355 | break; | |
2356 | } | |
2357 | (void) StoreByte (state, instr, LHS + LSRegRHS); | |
2358 | break; | |
2359 | ||
2360 | case 0x7d: /* Load Byte, No WriteBack, Pre Inc, Reg */ | |
2361 | if (BIT (4)) | |
2362 | { | |
2363 | ARMul_UndefInstr (state, instr); | |
2364 | break; | |
2365 | } | |
2366 | (void) LoadByte (state, instr, LHS + LSRegRHS, LUNSIGNED); | |
2367 | break; | |
2368 | ||
2369 | case 0x7e: /* Store Byte, WriteBack, Pre Inc, Reg */ | |
2370 | if (BIT (4)) | |
2371 | { | |
2372 | ARMul_UndefInstr (state, instr); | |
2373 | break; | |
2374 | } | |
2375 | UNDEF_LSRBaseEQOffWb; | |
2376 | UNDEF_LSRBaseEQDestWb; | |
2377 | UNDEF_LSRPCBaseWb; | |
2378 | UNDEF_LSRPCOffWb; | |
2379 | temp = LHS + LSRegRHS; | |
2380 | if (StoreByte (state, instr, temp)) | |
2381 | LSBase = temp; | |
2382 | break; | |
2383 | ||
2384 | case 0x7f: /* Load Byte, WriteBack, Pre Inc, Reg */ | |
2385 | if (BIT (4)) | |
2386 | { | |
2387 | /* Check for the special breakpoint opcode. | |
2388 | This value should correspond to the value defined | |
2389 | as ARM_BE_BREAKPOINT in gdb/arm-tdep.c. */ | |
2390 | if (BITS (0, 19) == 0xfdefe) | |
2391 | { | |
2392 | if (!ARMul_OSHandleSWI (state, SWI_Breakpoint)) | |
2393 | ARMul_Abort (state, ARMul_SWIV); | |
2394 | } | |
2395 | else | |
2396 | ARMul_UndefInstr (state, instr); | |
2397 | break; | |
2398 | } | |
2399 | UNDEF_LSRBaseEQOffWb; | |
2400 | UNDEF_LSRBaseEQDestWb; | |
2401 | UNDEF_LSRPCBaseWb; | |
2402 | UNDEF_LSRPCOffWb; | |
2403 | temp = LHS + LSRegRHS; | |
2404 | if (LoadByte (state, instr, temp, LUNSIGNED)) | |
2405 | LSBase = temp; | |
2406 | break; | |
c906108c SS |
2407 | |
2408 | /***************************************************************************\ | |
2409 | * Multiple Data Transfer Instructions * | |
2410 | \***************************************************************************/ | |
2411 | ||
dfcd3bfb JM |
2412 | case 0x80: /* Store, No WriteBack, Post Dec */ |
2413 | STOREMULT (instr, LSBase - LSMNumRegs + 4L, 0L); | |
2414 | break; | |
2415 | ||
2416 | case 0x81: /* Load, No WriteBack, Post Dec */ | |
2417 | LOADMULT (instr, LSBase - LSMNumRegs + 4L, 0L); | |
2418 | break; | |
2419 | ||
2420 | case 0x82: /* Store, WriteBack, Post Dec */ | |
2421 | temp = LSBase - LSMNumRegs; | |
2422 | STOREMULT (instr, temp + 4L, temp); | |
2423 | break; | |
c906108c | 2424 | |
dfcd3bfb JM |
2425 | case 0x83: /* Load, WriteBack, Post Dec */ |
2426 | temp = LSBase - LSMNumRegs; | |
2427 | LOADMULT (instr, temp + 4L, temp); | |
2428 | break; | |
c906108c | 2429 | |
dfcd3bfb JM |
2430 | case 0x84: /* Store, Flags, No WriteBack, Post Dec */ |
2431 | STORESMULT (instr, LSBase - LSMNumRegs + 4L, 0L); | |
2432 | break; | |
c906108c | 2433 | |
dfcd3bfb JM |
2434 | case 0x85: /* Load, Flags, No WriteBack, Post Dec */ |
2435 | LOADSMULT (instr, LSBase - LSMNumRegs + 4L, 0L); | |
2436 | break; | |
2437 | ||
2438 | case 0x86: /* Store, Flags, WriteBack, Post Dec */ | |
2439 | temp = LSBase - LSMNumRegs; | |
2440 | STORESMULT (instr, temp + 4L, temp); | |
2441 | break; | |
2442 | ||
2443 | case 0x87: /* Load, Flags, WriteBack, Post Dec */ | |
2444 | temp = LSBase - LSMNumRegs; | |
2445 | LOADSMULT (instr, temp + 4L, temp); | |
2446 | break; | |
c906108c SS |
2447 | |
2448 | ||
dfcd3bfb JM |
2449 | case 0x88: /* Store, No WriteBack, Post Inc */ |
2450 | STOREMULT (instr, LSBase, 0L); | |
2451 | break; | |
2452 | ||
2453 | case 0x89: /* Load, No WriteBack, Post Inc */ | |
2454 | LOADMULT (instr, LSBase, 0L); | |
2455 | break; | |
2456 | ||
2457 | case 0x8a: /* Store, WriteBack, Post Inc */ | |
2458 | temp = LSBase; | |
2459 | STOREMULT (instr, temp, temp + LSMNumRegs); | |
2460 | break; | |
2461 | ||
2462 | case 0x8b: /* Load, WriteBack, Post Inc */ | |
2463 | temp = LSBase; | |
2464 | LOADMULT (instr, temp, temp + LSMNumRegs); | |
2465 | break; | |
2466 | ||
2467 | case 0x8c: /* Store, Flags, No WriteBack, Post Inc */ | |
2468 | STORESMULT (instr, LSBase, 0L); | |
2469 | break; | |
2470 | ||
2471 | case 0x8d: /* Load, Flags, No WriteBack, Post Inc */ | |
2472 | LOADSMULT (instr, LSBase, 0L); | |
2473 | break; | |
2474 | ||
2475 | case 0x8e: /* Store, Flags, WriteBack, Post Inc */ | |
2476 | temp = LSBase; | |
2477 | STORESMULT (instr, temp, temp + LSMNumRegs); | |
2478 | break; | |
2479 | ||
2480 | case 0x8f: /* Load, Flags, WriteBack, Post Inc */ | |
2481 | temp = LSBase; | |
2482 | LOADSMULT (instr, temp, temp + LSMNumRegs); | |
2483 | break; | |
2484 | ||
2485 | ||
2486 | case 0x90: /* Store, No WriteBack, Pre Dec */ | |
2487 | STOREMULT (instr, LSBase - LSMNumRegs, 0L); | |
2488 | break; | |
2489 | ||
2490 | case 0x91: /* Load, No WriteBack, Pre Dec */ | |
2491 | LOADMULT (instr, LSBase - LSMNumRegs, 0L); | |
2492 | break; | |
2493 | ||
2494 | case 0x92: /* Store, WriteBack, Pre Dec */ | |
2495 | temp = LSBase - LSMNumRegs; | |
2496 | STOREMULT (instr, temp, temp); | |
2497 | break; | |
2498 | ||
2499 | case 0x93: /* Load, WriteBack, Pre Dec */ | |
2500 | temp = LSBase - LSMNumRegs; | |
2501 | LOADMULT (instr, temp, temp); | |
2502 | break; | |
2503 | ||
2504 | case 0x94: /* Store, Flags, No WriteBack, Pre Dec */ | |
2505 | STORESMULT (instr, LSBase - LSMNumRegs, 0L); | |
2506 | break; | |
2507 | ||
2508 | case 0x95: /* Load, Flags, No WriteBack, Pre Dec */ | |
2509 | LOADSMULT (instr, LSBase - LSMNumRegs, 0L); | |
2510 | break; | |
2511 | ||
2512 | case 0x96: /* Store, Flags, WriteBack, Pre Dec */ | |
2513 | temp = LSBase - LSMNumRegs; | |
2514 | STORESMULT (instr, temp, temp); | |
2515 | break; | |
2516 | ||
2517 | case 0x97: /* Load, Flags, WriteBack, Pre Dec */ | |
2518 | temp = LSBase - LSMNumRegs; | |
2519 | LOADSMULT (instr, temp, temp); | |
2520 | break; | |
2521 | ||
2522 | ||
2523 | case 0x98: /* Store, No WriteBack, Pre Inc */ | |
2524 | STOREMULT (instr, LSBase + 4L, 0L); | |
2525 | break; | |
2526 | ||
2527 | case 0x99: /* Load, No WriteBack, Pre Inc */ | |
2528 | LOADMULT (instr, LSBase + 4L, 0L); | |
2529 | break; | |
2530 | ||
2531 | case 0x9a: /* Store, WriteBack, Pre Inc */ | |
2532 | temp = LSBase; | |
2533 | STOREMULT (instr, temp + 4L, temp + LSMNumRegs); | |
2534 | break; | |
2535 | ||
2536 | case 0x9b: /* Load, WriteBack, Pre Inc */ | |
2537 | temp = LSBase; | |
2538 | LOADMULT (instr, temp + 4L, temp + LSMNumRegs); | |
2539 | break; | |
c906108c | 2540 | |
dfcd3bfb JM |
2541 | case 0x9c: /* Store, Flags, No WriteBack, Pre Inc */ |
2542 | STORESMULT (instr, LSBase + 4L, 0L); | |
2543 | break; | |
c906108c | 2544 | |
dfcd3bfb JM |
2545 | case 0x9d: /* Load, Flags, No WriteBack, Pre Inc */ |
2546 | LOADSMULT (instr, LSBase + 4L, 0L); | |
2547 | break; | |
c906108c | 2548 | |
dfcd3bfb JM |
2549 | case 0x9e: /* Store, Flags, WriteBack, Pre Inc */ |
2550 | temp = LSBase; | |
2551 | STORESMULT (instr, temp + 4L, temp + LSMNumRegs); | |
2552 | break; | |
2553 | ||
2554 | case 0x9f: /* Load, Flags, WriteBack, Pre Inc */ | |
2555 | temp = LSBase; | |
2556 | LOADSMULT (instr, temp + 4L, temp + LSMNumRegs); | |
2557 | break; | |
c906108c SS |
2558 | |
2559 | /***************************************************************************\ | |
2560 | * Branch forward * | |
2561 | \***************************************************************************/ | |
2562 | ||
dfcd3bfb JM |
2563 | case 0xa0: |
2564 | case 0xa1: | |
2565 | case 0xa2: | |
2566 | case 0xa3: | |
2567 | case 0xa4: | |
2568 | case 0xa5: | |
2569 | case 0xa6: | |
2570 | case 0xa7: | |
2571 | state->Reg[15] = pc + 8 + POSBRANCH; | |
2572 | FLUSHPIPE; | |
2573 | break; | |
c906108c SS |
2574 | |
2575 | /***************************************************************************\ | |
2576 | * Branch backward * | |
2577 | \***************************************************************************/ | |
2578 | ||
dfcd3bfb JM |
2579 | case 0xa8: |
2580 | case 0xa9: | |
2581 | case 0xaa: | |
2582 | case 0xab: | |
2583 | case 0xac: | |
2584 | case 0xad: | |
2585 | case 0xae: | |
2586 | case 0xaf: | |
2587 | state->Reg[15] = pc + 8 + NEGBRANCH; | |
2588 | FLUSHPIPE; | |
2589 | break; | |
c906108c SS |
2590 | |
2591 | /***************************************************************************\ | |
2592 | * Branch and Link forward * | |
2593 | \***************************************************************************/ | |
2594 | ||
dfcd3bfb JM |
2595 | case 0xb0: |
2596 | case 0xb1: | |
2597 | case 0xb2: | |
2598 | case 0xb3: | |
2599 | case 0xb4: | |
2600 | case 0xb5: | |
2601 | case 0xb6: | |
2602 | case 0xb7: | |
c906108c | 2603 | #ifdef MODE32 |
dfcd3bfb | 2604 | state->Reg[14] = pc + 4; /* put PC into Link */ |
c906108c | 2605 | #else |
6d358e86 | 2606 | state->Reg[14] = (pc + 4) | ECC | ER15INT | EMODE; /* put PC into Link */ |
c906108c | 2607 | #endif |
dfcd3bfb JM |
2608 | state->Reg[15] = pc + 8 + POSBRANCH; |
2609 | FLUSHPIPE; | |
2610 | break; | |
c906108c SS |
2611 | |
2612 | /***************************************************************************\ | |
2613 | * Branch and Link backward * | |
2614 | \***************************************************************************/ | |
2615 | ||
dfcd3bfb JM |
2616 | case 0xb8: |
2617 | case 0xb9: | |
2618 | case 0xba: | |
2619 | case 0xbb: | |
2620 | case 0xbc: | |
2621 | case 0xbd: | |
2622 | case 0xbe: | |
2623 | case 0xbf: | |
c906108c | 2624 | #ifdef MODE32 |
dfcd3bfb | 2625 | state->Reg[14] = pc + 4; /* put PC into Link */ |
c906108c | 2626 | #else |
dfcd3bfb | 2627 | state->Reg[14] = (pc + 4) | ECC | ER15INT | EMODE; /* put PC into Link */ |
c906108c | 2628 | #endif |
dfcd3bfb JM |
2629 | state->Reg[15] = pc + 8 + NEGBRANCH; |
2630 | FLUSHPIPE; | |
2631 | break; | |
c906108c SS |
2632 | |
2633 | /***************************************************************************\ | |
2634 | * Co-Processor Data Transfers * | |
2635 | \***************************************************************************/ | |
2636 | ||
dfcd3bfb JM |
2637 | case 0xc4: |
2638 | case 0xc0: /* Store , No WriteBack , Post Dec */ | |
2639 | ARMul_STC (state, instr, LHS); | |
2640 | break; | |
2641 | ||
2642 | case 0xc5: | |
2643 | case 0xc1: /* Load , No WriteBack , Post Dec */ | |
2644 | ARMul_LDC (state, instr, LHS); | |
2645 | break; | |
2646 | ||
2647 | case 0xc2: | |
2648 | case 0xc6: /* Store , WriteBack , Post Dec */ | |
2649 | lhs = LHS; | |
2650 | state->Base = lhs - LSCOff; | |
2651 | ARMul_STC (state, instr, lhs); | |
2652 | break; | |
2653 | ||
2654 | case 0xc3: | |
2655 | case 0xc7: /* Load , WriteBack , Post Dec */ | |
2656 | lhs = LHS; | |
2657 | state->Base = lhs - LSCOff; | |
2658 | ARMul_LDC (state, instr, lhs); | |
2659 | break; | |
2660 | ||
2661 | case 0xc8: | |
2662 | case 0xcc: /* Store , No WriteBack , Post Inc */ | |
2663 | ARMul_STC (state, instr, LHS); | |
2664 | break; | |
2665 | ||
2666 | case 0xc9: | |
2667 | case 0xcd: /* Load , No WriteBack , Post Inc */ | |
2668 | ARMul_LDC (state, instr, LHS); | |
2669 | break; | |
2670 | ||
2671 | case 0xca: | |
2672 | case 0xce: /* Store , WriteBack , Post Inc */ | |
2673 | lhs = LHS; | |
2674 | state->Base = lhs + LSCOff; | |
2675 | ARMul_STC (state, instr, LHS); | |
2676 | break; | |
2677 | ||
2678 | case 0xcb: | |
2679 | case 0xcf: /* Load , WriteBack , Post Inc */ | |
2680 | lhs = LHS; | |
2681 | state->Base = lhs + LSCOff; | |
2682 | ARMul_LDC (state, instr, LHS); | |
2683 | break; | |
2684 | ||
2685 | ||
2686 | case 0xd0: | |
2687 | case 0xd4: /* Store , No WriteBack , Pre Dec */ | |
2688 | ARMul_STC (state, instr, LHS - LSCOff); | |
2689 | break; | |
2690 | ||
2691 | case 0xd1: | |
2692 | case 0xd5: /* Load , No WriteBack , Pre Dec */ | |
2693 | ARMul_LDC (state, instr, LHS - LSCOff); | |
2694 | break; | |
2695 | ||
2696 | case 0xd2: | |
2697 | case 0xd6: /* Store , WriteBack , Pre Dec */ | |
2698 | lhs = LHS - LSCOff; | |
2699 | state->Base = lhs; | |
2700 | ARMul_STC (state, instr, lhs); | |
2701 | break; | |
2702 | ||
2703 | case 0xd3: | |
2704 | case 0xd7: /* Load , WriteBack , Pre Dec */ | |
2705 | lhs = LHS - LSCOff; | |
2706 | state->Base = lhs; | |
2707 | ARMul_LDC (state, instr, lhs); | |
2708 | break; | |
2709 | ||
2710 | case 0xd8: | |
2711 | case 0xdc: /* Store , No WriteBack , Pre Inc */ | |
2712 | ARMul_STC (state, instr, LHS + LSCOff); | |
2713 | break; | |
2714 | ||
2715 | case 0xd9: | |
2716 | case 0xdd: /* Load , No WriteBack , Pre Inc */ | |
2717 | ARMul_LDC (state, instr, LHS + LSCOff); | |
2718 | break; | |
2719 | ||
2720 | case 0xda: | |
2721 | case 0xde: /* Store , WriteBack , Pre Inc */ | |
2722 | lhs = LHS + LSCOff; | |
2723 | state->Base = lhs; | |
2724 | ARMul_STC (state, instr, lhs); | |
2725 | break; | |
2726 | ||
2727 | case 0xdb: | |
2728 | case 0xdf: /* Load , WriteBack , Pre Inc */ | |
2729 | lhs = LHS + LSCOff; | |
2730 | state->Base = lhs; | |
2731 | ARMul_LDC (state, instr, lhs); | |
2732 | break; | |
c906108c SS |
2733 | |
2734 | /***************************************************************************\ | |
2735 | * Co-Processor Register Transfers (MCR) and Data Ops * | |
2736 | \***************************************************************************/ | |
2737 | ||
dfcd3bfb JM |
2738 | case 0xe2: |
2739 | case 0xe0: | |
2740 | case 0xe4: | |
2741 | case 0xe6: | |
2742 | case 0xe8: | |
2743 | case 0xea: | |
2744 | case 0xec: | |
2745 | case 0xee: | |
2746 | if (BIT (4)) | |
2747 | { /* MCR */ | |
2748 | if (DESTReg == 15) | |
2749 | { | |
2750 | UNDEF_MCRPC; | |
c906108c | 2751 | #ifdef MODE32 |
dfcd3bfb | 2752 | ARMul_MCR (state, instr, state->Reg[15] + isize); |
c906108c | 2753 | #else |
dfcd3bfb JM |
2754 | ARMul_MCR (state, instr, ECC | ER15INT | EMODE | |
2755 | ((state->Reg[15] + isize) & R15PCBITS)); | |
c906108c | 2756 | #endif |
dfcd3bfb JM |
2757 | } |
2758 | else | |
2759 | ARMul_MCR (state, instr, DEST); | |
2760 | } | |
2761 | else /* CDP Part 1 */ | |
2762 | ARMul_CDP (state, instr); | |
2763 | break; | |
c906108c SS |
2764 | |
2765 | /***************************************************************************\ | |
2766 | * Co-Processor Register Transfers (MRC) and Data Ops * | |
2767 | \***************************************************************************/ | |
2768 | ||
dfcd3bfb JM |
2769 | case 0xe1: |
2770 | case 0xe3: | |
2771 | case 0xe5: | |
2772 | case 0xe7: | |
2773 | case 0xe9: | |
2774 | case 0xeb: | |
2775 | case 0xed: | |
2776 | case 0xef: | |
2777 | if (BIT (4)) | |
2778 | { /* MRC */ | |
2779 | temp = ARMul_MRC (state, instr); | |
2780 | if (DESTReg == 15) | |
2781 | { | |
2782 | ASSIGNN ((temp & NBIT) != 0); | |
2783 | ASSIGNZ ((temp & ZBIT) != 0); | |
2784 | ASSIGNC ((temp & CBIT) != 0); | |
2785 | ASSIGNV ((temp & VBIT) != 0); | |
2786 | } | |
2787 | else | |
2788 | DEST = temp; | |
2789 | } | |
2790 | else /* CDP Part 2 */ | |
2791 | ARMul_CDP (state, instr); | |
2792 | break; | |
c906108c SS |
2793 | |
2794 | /***************************************************************************\ | |
2795 | * SWI instruction * | |
2796 | \***************************************************************************/ | |
2797 | ||
dfcd3bfb JM |
2798 | case 0xf0: |
2799 | case 0xf1: | |
2800 | case 0xf2: | |
2801 | case 0xf3: | |
2802 | case 0xf4: | |
2803 | case 0xf5: | |
2804 | case 0xf6: | |
2805 | case 0xf7: | |
2806 | case 0xf8: | |
2807 | case 0xf9: | |
2808 | case 0xfa: | |
2809 | case 0xfb: | |
2810 | case 0xfc: | |
2811 | case 0xfd: | |
2812 | case 0xfe: | |
2813 | case 0xff: | |
2814 | if (instr == ARMul_ABORTWORD && state->AbortAddr == pc) | |
2815 | { /* a prefetch abort */ | |
2816 | ARMul_Abort (state, ARMul_PrefetchAbortV); | |
2817 | break; | |
2818 | } | |
2819 | ||
2820 | if (!ARMul_OSHandleSWI (state, BITS (0, 23))) | |
2821 | { | |
2822 | ARMul_Abort (state, ARMul_SWIV); | |
2823 | } | |
2824 | break; | |
2825 | } /* 256 way main switch */ | |
2826 | } /* if temp */ | |
c906108c SS |
2827 | |
2828 | #ifdef MODET | |
dfcd3bfb | 2829 | donext: |
c906108c SS |
2830 | #endif |
2831 | ||
7a292a7a | 2832 | #ifdef NEED_UI_LOOP_HOOK |
dfcd3bfb JM |
2833 | if (ui_loop_hook != NULL && ui_loop_hook_counter-- < 0) |
2834 | { | |
2835 | ui_loop_hook_counter = UI_LOOP_POLL_INTERVAL; | |
2836 | ui_loop_hook (0); | |
2837 | } | |
7a292a7a SS |
2838 | #endif /* NEED_UI_LOOP_HOOK */ |
2839 | ||
dfcd3bfb JM |
2840 | if (state->Emulate == ONCE) |
2841 | state->Emulate = STOP; | |
c1a72ffd NC |
2842 | /* If we have changed mode, allow the PC to advance before stopping. */ |
2843 | else if (state->Emulate == CHANGEMODE) | |
2844 | continue; | |
dfcd3bfb JM |
2845 | else if (state->Emulate != RUN) |
2846 | break; | |
2847 | } | |
2848 | while (!stop_simulator); /* do loop */ | |
c906108c | 2849 | |
dfcd3bfb JM |
2850 | state->decoded = decoded; |
2851 | state->loaded = loaded; | |
2852 | state->pc = pc; | |
c1a72ffd NC |
2853 | |
2854 | return pc; | |
dfcd3bfb | 2855 | } /* Emulate 26/32 in instruction based mode */ |
c906108c SS |
2856 | |
2857 | ||
2858 | /***************************************************************************\ | |
2859 | * This routine evaluates most Data Processing register RHS's with the S * | |
2860 | * bit clear. It is intended to be called from the macro DPRegRHS, which * | |
2861 | * filters the common case of an unshifted register with in line code * | |
2862 | \***************************************************************************/ | |
2863 | ||
dfcd3bfb JM |
2864 | static ARMword |
2865 | GetDPRegRHS (ARMul_State * state, ARMword instr) | |
2866 | { | |
2867 | ARMword shamt, base; | |
c906108c | 2868 | |
dfcd3bfb JM |
2869 | base = RHSReg; |
2870 | if (BIT (4)) | |
2871 | { /* shift amount in a register */ | |
2872 | UNDEF_Shift; | |
2873 | INCPC; | |
c906108c | 2874 | #ifndef MODE32 |
dfcd3bfb JM |
2875 | if (base == 15) |
2876 | base = ECC | ER15INT | R15PC | EMODE; | |
2877 | else | |
2878 | #endif | |
2879 | base = state->Reg[base]; | |
2880 | ARMul_Icycles (state, 1, 0L); | |
2881 | shamt = state->Reg[BITS (8, 11)] & 0xff; | |
2882 | switch ((int) BITS (5, 6)) | |
2883 | { | |
2884 | case LSL: | |
2885 | if (shamt == 0) | |
2886 | return (base); | |
2887 | else if (shamt >= 32) | |
2888 | return (0); | |
2889 | else | |
2890 | return (base << shamt); | |
2891 | case LSR: | |
2892 | if (shamt == 0) | |
2893 | return (base); | |
2894 | else if (shamt >= 32) | |
2895 | return (0); | |
2896 | else | |
2897 | return (base >> shamt); | |
2898 | case ASR: | |
2899 | if (shamt == 0) | |
2900 | return (base); | |
2901 | else if (shamt >= 32) | |
2902 | return ((ARMword) ((long int) base >> 31L)); | |
2903 | else | |
2904 | return ((ARMword) ((long int) base >> (int) shamt)); | |
2905 | case ROR: | |
2906 | shamt &= 0x1f; | |
2907 | if (shamt == 0) | |
2908 | return (base); | |
2909 | else | |
2910 | return ((base << (32 - shamt)) | (base >> shamt)); | |
2911 | } | |
c906108c | 2912 | } |
dfcd3bfb JM |
2913 | else |
2914 | { /* shift amount is a constant */ | |
c906108c | 2915 | #ifndef MODE32 |
dfcd3bfb JM |
2916 | if (base == 15) |
2917 | base = ECC | ER15INT | R15PC | EMODE; | |
2918 | else | |
2919 | #endif | |
2920 | base = state->Reg[base]; | |
2921 | shamt = BITS (7, 11); | |
2922 | switch ((int) BITS (5, 6)) | |
2923 | { | |
2924 | case LSL: | |
2925 | return (base << shamt); | |
2926 | case LSR: | |
2927 | if (shamt == 0) | |
2928 | return (0); | |
2929 | else | |
2930 | return (base >> shamt); | |
2931 | case ASR: | |
2932 | if (shamt == 0) | |
2933 | return ((ARMword) ((long int) base >> 31L)); | |
2934 | else | |
2935 | return ((ARMword) ((long int) base >> (int) shamt)); | |
2936 | case ROR: | |
2937 | if (shamt == 0) /* its an RRX */ | |
2938 | return ((base >> 1) | (CFLAG << 31)); | |
2939 | else | |
2940 | return ((base << (32 - shamt)) | (base >> shamt)); | |
2941 | } | |
c906108c | 2942 | } |
dfcd3bfb JM |
2943 | return (0); /* just to shut up lint */ |
2944 | } | |
2945 | ||
c906108c SS |
2946 | /***************************************************************************\ |
2947 | * This routine evaluates most Logical Data Processing register RHS's * | |
2948 | * with the S bit set. It is intended to be called from the macro * | |
2949 | * DPSRegRHS, which filters the common case of an unshifted register * | |
2950 | * with in line code * | |
2951 | \***************************************************************************/ | |
2952 | ||
dfcd3bfb JM |
2953 | static ARMword |
2954 | GetDPSRegRHS (ARMul_State * state, ARMword instr) | |
2955 | { | |
2956 | ARMword shamt, base; | |
c906108c | 2957 | |
dfcd3bfb JM |
2958 | base = RHSReg; |
2959 | if (BIT (4)) | |
2960 | { /* shift amount in a register */ | |
2961 | UNDEF_Shift; | |
2962 | INCPC; | |
c906108c | 2963 | #ifndef MODE32 |
dfcd3bfb JM |
2964 | if (base == 15) |
2965 | base = ECC | ER15INT | R15PC | EMODE; | |
2966 | else | |
2967 | #endif | |
2968 | base = state->Reg[base]; | |
2969 | ARMul_Icycles (state, 1, 0L); | |
2970 | shamt = state->Reg[BITS (8, 11)] & 0xff; | |
2971 | switch ((int) BITS (5, 6)) | |
2972 | { | |
2973 | case LSL: | |
2974 | if (shamt == 0) | |
2975 | return (base); | |
2976 | else if (shamt == 32) | |
2977 | { | |
2978 | ASSIGNC (base & 1); | |
2979 | return (0); | |
2980 | } | |
2981 | else if (shamt > 32) | |
2982 | { | |
2983 | CLEARC; | |
2984 | return (0); | |
2985 | } | |
2986 | else | |
2987 | { | |
2988 | ASSIGNC ((base >> (32 - shamt)) & 1); | |
2989 | return (base << shamt); | |
2990 | } | |
2991 | case LSR: | |
2992 | if (shamt == 0) | |
2993 | return (base); | |
2994 | else if (shamt == 32) | |
2995 | { | |
2996 | ASSIGNC (base >> 31); | |
2997 | return (0); | |
2998 | } | |
2999 | else if (shamt > 32) | |
3000 | { | |
3001 | CLEARC; | |
3002 | return (0); | |
3003 | } | |
3004 | else | |
3005 | { | |
3006 | ASSIGNC ((base >> (shamt - 1)) & 1); | |
3007 | return (base >> shamt); | |
3008 | } | |
3009 | case ASR: | |
3010 | if (shamt == 0) | |
3011 | return (base); | |
3012 | else if (shamt >= 32) | |
3013 | { | |
3014 | ASSIGNC (base >> 31L); | |
3015 | return ((ARMword) ((long int) base >> 31L)); | |
3016 | } | |
3017 | else | |
3018 | { | |
3019 | ASSIGNC ((ARMword) ((long int) base >> (int) (shamt - 1)) & 1); | |
3020 | return ((ARMword) ((long int) base >> (int) shamt)); | |
3021 | } | |
3022 | case ROR: | |
3023 | if (shamt == 0) | |
3024 | return (base); | |
3025 | shamt &= 0x1f; | |
3026 | if (shamt == 0) | |
3027 | { | |
3028 | ASSIGNC (base >> 31); | |
3029 | return (base); | |
3030 | } | |
3031 | else | |
3032 | { | |
3033 | ASSIGNC ((base >> (shamt - 1)) & 1); | |
3034 | return ((base << (32 - shamt)) | (base >> shamt)); | |
3035 | } | |
3036 | } | |
c906108c | 3037 | } |
dfcd3bfb JM |
3038 | else |
3039 | { /* shift amount is a constant */ | |
c906108c | 3040 | #ifndef MODE32 |
dfcd3bfb JM |
3041 | if (base == 15) |
3042 | base = ECC | ER15INT | R15PC | EMODE; | |
3043 | else | |
3044 | #endif | |
3045 | base = state->Reg[base]; | |
3046 | shamt = BITS (7, 11); | |
3047 | switch ((int) BITS (5, 6)) | |
3048 | { | |
3049 | case LSL: | |
3050 | ASSIGNC ((base >> (32 - shamt)) & 1); | |
3051 | return (base << shamt); | |
3052 | case LSR: | |
3053 | if (shamt == 0) | |
3054 | { | |
3055 | ASSIGNC (base >> 31); | |
3056 | return (0); | |
3057 | } | |
3058 | else | |
3059 | { | |
3060 | ASSIGNC ((base >> (shamt - 1)) & 1); | |
3061 | return (base >> shamt); | |
3062 | } | |
3063 | case ASR: | |
3064 | if (shamt == 0) | |
3065 | { | |
3066 | ASSIGNC (base >> 31L); | |
3067 | return ((ARMword) ((long int) base >> 31L)); | |
3068 | } | |
3069 | else | |
3070 | { | |
3071 | ASSIGNC ((ARMword) ((long int) base >> (int) (shamt - 1)) & 1); | |
3072 | return ((ARMword) ((long int) base >> (int) shamt)); | |
3073 | } | |
3074 | case ROR: | |
3075 | if (shamt == 0) | |
3076 | { /* its an RRX */ | |
3077 | shamt = CFLAG; | |
3078 | ASSIGNC (base & 1); | |
3079 | return ((base >> 1) | (shamt << 31)); | |
3080 | } | |
3081 | else | |
3082 | { | |
3083 | ASSIGNC ((base >> (shamt - 1)) & 1); | |
3084 | return ((base << (32 - shamt)) | (base >> shamt)); | |
3085 | } | |
3086 | } | |
c906108c | 3087 | } |
dfcd3bfb JM |
3088 | return (0); /* just to shut up lint */ |
3089 | } | |
c906108c SS |
3090 | |
3091 | /***************************************************************************\ | |
3092 | * This routine handles writes to register 15 when the S bit is not set. * | |
3093 | \***************************************************************************/ | |
3094 | ||
dfcd3bfb JM |
3095 | static void |
3096 | WriteR15 (ARMul_State * state, ARMword src) | |
c906108c | 3097 | { |
892c6b9d AO |
3098 | /* The ARM documentation states that the two least significant bits |
3099 | are discarded when setting PC, except in the cases handled by | |
e063aa3b AO |
3100 | WriteR15Branch() below. It's probably an oversight: in THUMB |
3101 | mode, the second least significant bit should probably not be | |
3102 | discarded. */ | |
3103 | #ifdef MODET | |
3104 | if (TFLAG) | |
3105 | src &= 0xfffffffe; | |
3106 | else | |
3107 | #endif | |
3108 | src &= 0xfffffffc; | |
c906108c | 3109 | #ifdef MODE32 |
892c6b9d | 3110 | state->Reg[15] = src & PCBITS; |
c906108c | 3111 | #else |
892c6b9d | 3112 | state->Reg[15] = (src & R15PCBITS) | ECC | ER15INT | EMODE; |
dfcd3bfb | 3113 | ARMul_R15Altered (state); |
c906108c | 3114 | #endif |
dfcd3bfb JM |
3115 | FLUSHPIPE; |
3116 | } | |
c906108c SS |
3117 | |
3118 | /***************************************************************************\ | |
3119 | * This routine handles writes to register 15 when the S bit is set. * | |
3120 | \***************************************************************************/ | |
3121 | ||
dfcd3bfb JM |
3122 | static void |
3123 | WriteSR15 (ARMul_State * state, ARMword src) | |
c906108c SS |
3124 | { |
3125 | #ifdef MODE32 | |
dfcd3bfb JM |
3126 | if (state->Bank > 0) |
3127 | { | |
3128 | state->Cpsr = state->Spsr[state->Bank]; | |
3129 | ARMul_CPSRAltered (state); | |
c906108c | 3130 | } |
e063aa3b AO |
3131 | #ifdef MODET |
3132 | if (TFLAG) | |
3133 | src &= 0xfffffffe; | |
3134 | else | |
3135 | #endif | |
3136 | src &= 0xfffffffc; | |
3137 | state->Reg[15] = src & PCBITS; | |
c906108c | 3138 | #else |
e063aa3b AO |
3139 | #ifdef MODET |
3140 | if (TFLAG) | |
3141 | abort (); /* ARMul_R15Altered would have to support it. */ | |
3142 | else | |
3143 | #endif | |
3144 | src &= 0xfffffffc; | |
dfcd3bfb JM |
3145 | if (state->Bank == USERBANK) |
3146 | state->Reg[15] = (src & (CCBITS | R15PCBITS)) | ER15INT | EMODE; | |
3147 | else | |
3148 | state->Reg[15] = src; | |
3149 | ARMul_R15Altered (state); | |
c906108c | 3150 | #endif |
dfcd3bfb JM |
3151 | FLUSHPIPE; |
3152 | } | |
c906108c | 3153 | |
892c6b9d AO |
3154 | /* In machines capable of running in Thumb mode, BX, BLX, LDR and LDM |
3155 | will switch to Thumb mode if the least significant bit is set. */ | |
3156 | ||
3157 | static void | |
3158 | WriteR15Branch (ARMul_State * state, ARMword src) | |
3159 | { | |
3160 | #ifdef MODET | |
3161 | if (src & 1) | |
3162 | { /* Thumb bit */ | |
3163 | SETT; | |
3164 | state->Reg[15] = src & 0xfffffffe; | |
3165 | } | |
3166 | else | |
3167 | { | |
3168 | CLEART; | |
3169 | state->Reg[15] = src & 0xfffffffc; | |
3170 | } | |
3171 | FLUSHPIPE; | |
3172 | #else | |
3173 | WriteR15 (state, src); | |
3174 | #endif | |
3175 | } | |
3176 | ||
c906108c SS |
3177 | /***************************************************************************\ |
3178 | * This routine evaluates most Load and Store register RHS's. It is * | |
3179 | * intended to be called from the macro LSRegRHS, which filters the * | |
3180 | * common case of an unshifted register with in line code * | |
3181 | \***************************************************************************/ | |
3182 | ||
dfcd3bfb JM |
3183 | static ARMword |
3184 | GetLSRegRHS (ARMul_State * state, ARMword instr) | |
3185 | { | |
3186 | ARMword shamt, base; | |
c906108c | 3187 | |
dfcd3bfb | 3188 | base = RHSReg; |
c906108c | 3189 | #ifndef MODE32 |
dfcd3bfb JM |
3190 | if (base == 15) |
3191 | base = ECC | ER15INT | R15PC | EMODE; /* Now forbidden, but .... */ | |
3192 | else | |
3193 | #endif | |
3194 | base = state->Reg[base]; | |
3195 | ||
3196 | shamt = BITS (7, 11); | |
3197 | switch ((int) BITS (5, 6)) | |
3198 | { | |
3199 | case LSL: | |
3200 | return (base << shamt); | |
3201 | case LSR: | |
3202 | if (shamt == 0) | |
3203 | return (0); | |
3204 | else | |
3205 | return (base >> shamt); | |
3206 | case ASR: | |
3207 | if (shamt == 0) | |
3208 | return ((ARMword) ((long int) base >> 31L)); | |
3209 | else | |
3210 | return ((ARMword) ((long int) base >> (int) shamt)); | |
3211 | case ROR: | |
3212 | if (shamt == 0) /* its an RRX */ | |
3213 | return ((base >> 1) | (CFLAG << 31)); | |
3214 | else | |
3215 | return ((base << (32 - shamt)) | (base >> shamt)); | |
c906108c | 3216 | } |
dfcd3bfb JM |
3217 | return (0); /* just to shut up lint */ |
3218 | } | |
c906108c SS |
3219 | |
3220 | /***************************************************************************\ | |
3221 | * This routine evaluates the ARM7T halfword and signed transfer RHS's. * | |
3222 | \***************************************************************************/ | |
3223 | ||
dfcd3bfb JM |
3224 | static ARMword |
3225 | GetLS7RHS (ARMul_State * state, ARMword instr) | |
c906108c | 3226 | { |
dfcd3bfb JM |
3227 | if (BIT (22) == 0) |
3228 | { /* register */ | |
c906108c | 3229 | #ifndef MODE32 |
dfcd3bfb JM |
3230 | if (RHSReg == 15) |
3231 | return ECC | ER15INT | R15PC | EMODE; /* Now forbidden, but ... */ | |
c906108c | 3232 | #endif |
dfcd3bfb | 3233 | return state->Reg[RHSReg]; |
c906108c SS |
3234 | } |
3235 | ||
dfcd3bfb JM |
3236 | /* else immediate */ |
3237 | return BITS (0, 3) | (BITS (8, 11) << 4); | |
3238 | } | |
c906108c SS |
3239 | |
3240 | /***************************************************************************\ | |
3241 | * This function does the work of loading a word for a LDR instruction. * | |
3242 | \***************************************************************************/ | |
3243 | ||
dfcd3bfb JM |
3244 | static unsigned |
3245 | LoadWord (ARMul_State * state, ARMword instr, ARMword address) | |
c906108c | 3246 | { |
dfcd3bfb | 3247 | ARMword dest; |
c906108c | 3248 | |
dfcd3bfb | 3249 | BUSUSEDINCPCS; |
c906108c | 3250 | #ifndef MODE32 |
dfcd3bfb JM |
3251 | if (ADDREXCEPT (address)) |
3252 | { | |
3253 | INTERNALABORT (address); | |
c906108c SS |
3254 | } |
3255 | #endif | |
dfcd3bfb JM |
3256 | dest = ARMul_LoadWordN (state, address); |
3257 | if (state->Aborted) | |
3258 | { | |
3259 | TAKEABORT; | |
3260 | return (state->lateabtSig); | |
c906108c | 3261 | } |
dfcd3bfb JM |
3262 | if (address & 3) |
3263 | dest = ARMul_Align (state, address, dest); | |
892c6b9d | 3264 | WRITEDESTB (dest); |
dfcd3bfb | 3265 | ARMul_Icycles (state, 1, 0L); |
c906108c | 3266 | |
dfcd3bfb | 3267 | return (DESTReg != LHSReg); |
c906108c SS |
3268 | } |
3269 | ||
3270 | #ifdef MODET | |
3271 | /***************************************************************************\ | |
3272 | * This function does the work of loading a halfword. * | |
3273 | \***************************************************************************/ | |
3274 | ||
dfcd3bfb JM |
3275 | static unsigned |
3276 | LoadHalfWord (ARMul_State * state, ARMword instr, ARMword address, | |
3277 | int signextend) | |
c906108c | 3278 | { |
dfcd3bfb | 3279 | ARMword dest; |
c906108c | 3280 | |
dfcd3bfb | 3281 | BUSUSEDINCPCS; |
c906108c | 3282 | #ifndef MODE32 |
dfcd3bfb JM |
3283 | if (ADDREXCEPT (address)) |
3284 | { | |
3285 | INTERNALABORT (address); | |
c906108c SS |
3286 | } |
3287 | #endif | |
dfcd3bfb JM |
3288 | dest = ARMul_LoadHalfWord (state, address); |
3289 | if (state->Aborted) | |
3290 | { | |
3291 | TAKEABORT; | |
3292 | return (state->lateabtSig); | |
c906108c | 3293 | } |
dfcd3bfb JM |
3294 | UNDEF_LSRBPC; |
3295 | if (signextend) | |
3296 | { | |
3297 | if (dest & 1 << (16 - 1)) | |
3298 | dest = (dest & ((1 << 16) - 1)) - (1 << 16); | |
3299 | } | |
3300 | WRITEDEST (dest); | |
3301 | ARMul_Icycles (state, 1, 0L); | |
3302 | return (DESTReg != LHSReg); | |
c906108c | 3303 | } |
dfcd3bfb | 3304 | |
c906108c SS |
3305 | #endif /* MODET */ |
3306 | ||
3307 | /***************************************************************************\ | |
3308 | * This function does the work of loading a byte for a LDRB instruction. * | |
3309 | \***************************************************************************/ | |
3310 | ||
dfcd3bfb JM |
3311 | static unsigned |
3312 | LoadByte (ARMul_State * state, ARMword instr, ARMword address, int signextend) | |
c906108c | 3313 | { |
dfcd3bfb | 3314 | ARMword dest; |
c906108c | 3315 | |
dfcd3bfb | 3316 | BUSUSEDINCPCS; |
c906108c | 3317 | #ifndef MODE32 |
dfcd3bfb JM |
3318 | if (ADDREXCEPT (address)) |
3319 | { | |
3320 | INTERNALABORT (address); | |
c906108c SS |
3321 | } |
3322 | #endif | |
dfcd3bfb JM |
3323 | dest = ARMul_LoadByte (state, address); |
3324 | if (state->Aborted) | |
3325 | { | |
3326 | TAKEABORT; | |
3327 | return (state->lateabtSig); | |
3328 | } | |
3329 | UNDEF_LSRBPC; | |
3330 | if (signextend) | |
3331 | { | |
3332 | if (dest & 1 << (8 - 1)) | |
3333 | dest = (dest & ((1 << 8) - 1)) - (1 << 8); | |
c906108c | 3334 | } |
dfcd3bfb JM |
3335 | WRITEDEST (dest); |
3336 | ARMul_Icycles (state, 1, 0L); | |
3337 | return (DESTReg != LHSReg); | |
c906108c SS |
3338 | } |
3339 | ||
3340 | /***************************************************************************\ | |
3341 | * This function does the work of storing a word from a STR instruction. * | |
3342 | \***************************************************************************/ | |
3343 | ||
dfcd3bfb JM |
3344 | static unsigned |
3345 | StoreWord (ARMul_State * state, ARMword instr, ARMword address) | |
3346 | { | |
3347 | BUSUSEDINCPCN; | |
c906108c | 3348 | #ifndef MODE32 |
dfcd3bfb JM |
3349 | if (DESTReg == 15) |
3350 | state->Reg[15] = ECC | ER15INT | R15PC | EMODE; | |
c906108c SS |
3351 | #endif |
3352 | #ifdef MODE32 | |
dfcd3bfb | 3353 | ARMul_StoreWordN (state, address, DEST); |
c906108c | 3354 | #else |
dfcd3bfb JM |
3355 | if (VECTORACCESS (address) || ADDREXCEPT (address)) |
3356 | { | |
3357 | INTERNALABORT (address); | |
3358 | (void) ARMul_LoadWordN (state, address); | |
c906108c | 3359 | } |
dfcd3bfb JM |
3360 | else |
3361 | ARMul_StoreWordN (state, address, DEST); | |
c906108c | 3362 | #endif |
dfcd3bfb JM |
3363 | if (state->Aborted) |
3364 | { | |
3365 | TAKEABORT; | |
3366 | return (state->lateabtSig); | |
c906108c | 3367 | } |
dfcd3bfb | 3368 | return (TRUE); |
c906108c SS |
3369 | } |
3370 | ||
3371 | #ifdef MODET | |
3372 | /***************************************************************************\ | |
3373 | * This function does the work of storing a byte for a STRH instruction. * | |
3374 | \***************************************************************************/ | |
3375 | ||
dfcd3bfb JM |
3376 | static unsigned |
3377 | StoreHalfWord (ARMul_State * state, ARMword instr, ARMword address) | |
3378 | { | |
3379 | BUSUSEDINCPCN; | |
c906108c SS |
3380 | |
3381 | #ifndef MODE32 | |
dfcd3bfb JM |
3382 | if (DESTReg == 15) |
3383 | state->Reg[15] = ECC | ER15INT | R15PC | EMODE; | |
c906108c SS |
3384 | #endif |
3385 | ||
3386 | #ifdef MODE32 | |
dfcd3bfb | 3387 | ARMul_StoreHalfWord (state, address, DEST); |
c906108c | 3388 | #else |
dfcd3bfb JM |
3389 | if (VECTORACCESS (address) || ADDREXCEPT (address)) |
3390 | { | |
3391 | INTERNALABORT (address); | |
3392 | (void) ARMul_LoadHalfWord (state, address); | |
c906108c | 3393 | } |
dfcd3bfb JM |
3394 | else |
3395 | ARMul_StoreHalfWord (state, address, DEST); | |
c906108c SS |
3396 | #endif |
3397 | ||
dfcd3bfb JM |
3398 | if (state->Aborted) |
3399 | { | |
3400 | TAKEABORT; | |
3401 | return (state->lateabtSig); | |
c906108c SS |
3402 | } |
3403 | ||
dfcd3bfb | 3404 | return (TRUE); |
c906108c | 3405 | } |
dfcd3bfb | 3406 | |
c906108c SS |
3407 | #endif /* MODET */ |
3408 | ||
3409 | /***************************************************************************\ | |
3410 | * This function does the work of storing a byte for a STRB instruction. * | |
3411 | \***************************************************************************/ | |
3412 | ||
dfcd3bfb JM |
3413 | static unsigned |
3414 | StoreByte (ARMul_State * state, ARMword instr, ARMword address) | |
3415 | { | |
3416 | BUSUSEDINCPCN; | |
c906108c | 3417 | #ifndef MODE32 |
dfcd3bfb JM |
3418 | if (DESTReg == 15) |
3419 | state->Reg[15] = ECC | ER15INT | R15PC | EMODE; | |
c906108c SS |
3420 | #endif |
3421 | #ifdef MODE32 | |
dfcd3bfb | 3422 | ARMul_StoreByte (state, address, DEST); |
c906108c | 3423 | #else |
dfcd3bfb JM |
3424 | if (VECTORACCESS (address) || ADDREXCEPT (address)) |
3425 | { | |
3426 | INTERNALABORT (address); | |
3427 | (void) ARMul_LoadByte (state, address); | |
c906108c | 3428 | } |
dfcd3bfb JM |
3429 | else |
3430 | ARMul_StoreByte (state, address, DEST); | |
c906108c | 3431 | #endif |
dfcd3bfb JM |
3432 | if (state->Aborted) |
3433 | { | |
3434 | TAKEABORT; | |
3435 | return (state->lateabtSig); | |
c906108c | 3436 | } |
dfcd3bfb JM |
3437 | UNDEF_LSRBPC; |
3438 | return (TRUE); | |
c906108c SS |
3439 | } |
3440 | ||
3441 | /***************************************************************************\ | |
3442 | * This function does the work of loading the registers listed in an LDM * | |
3443 | * instruction, when the S bit is clear. The code here is always increment * | |
3444 | * after, it's up to the caller to get the input address correct and to * | |
3445 | * handle base register modification. * | |
3446 | \***************************************************************************/ | |
3447 | ||
dfcd3bfb JM |
3448 | static void |
3449 | LoadMult (ARMul_State * state, ARMword instr, ARMword address, ARMword WBBase) | |
3450 | { | |
3451 | ARMword dest, temp; | |
c906108c | 3452 | |
dfcd3bfb JM |
3453 | UNDEF_LSMNoRegs; |
3454 | UNDEF_LSMPCBase; | |
3455 | UNDEF_LSMBaseInListWb; | |
3456 | BUSUSEDINCPCS; | |
c906108c | 3457 | #ifndef MODE32 |
dfcd3bfb JM |
3458 | if (ADDREXCEPT (address)) |
3459 | { | |
3460 | INTERNALABORT (address); | |
c906108c SS |
3461 | } |
3462 | #endif | |
dfcd3bfb JM |
3463 | if (BIT (21) && LHSReg != 15) |
3464 | LSBase = WBBase; | |
3465 | ||
3466 | for (temp = 0; !BIT (temp); temp++); /* N cycle first */ | |
3467 | dest = ARMul_LoadWordN (state, address); | |
3468 | if (!state->abortSig && !state->Aborted) | |
3469 | state->Reg[temp++] = dest; | |
3470 | else if (!state->Aborted) | |
3471 | state->Aborted = ARMul_DataAbortV; | |
3472 | ||
3473 | for (; temp < 16; temp++) /* S cycles from here on */ | |
3474 | if (BIT (temp)) | |
3475 | { /* load this register */ | |
3476 | address += 4; | |
3477 | dest = ARMul_LoadWordS (state, address); | |
3478 | if (!state->abortSig && !state->Aborted) | |
3479 | state->Reg[temp] = dest; | |
3480 | else if (!state->Aborted) | |
3481 | state->Aborted = ARMul_DataAbortV; | |
3482 | } | |
3483 | ||
5d0d395e | 3484 | if (BIT (15) && !state->Aborted) |
dfcd3bfb | 3485 | { /* PC is in the reg list */ |
892c6b9d | 3486 | WriteR15Branch(state, PC); |
c906108c SS |
3487 | } |
3488 | ||
dfcd3bfb | 3489 | ARMul_Icycles (state, 1, 0L); /* to write back the final register */ |
c906108c | 3490 | |
dfcd3bfb JM |
3491 | if (state->Aborted) |
3492 | { | |
3493 | if (BIT (21) && LHSReg != 15) | |
3494 | LSBase = WBBase; | |
3495 | TAKEABORT; | |
c906108c | 3496 | } |
dfcd3bfb | 3497 | } |
c906108c SS |
3498 | |
3499 | /***************************************************************************\ | |
3500 | * This function does the work of loading the registers listed in an LDM * | |
3501 | * instruction, when the S bit is set. The code here is always increment * | |
3502 | * after, it's up to the caller to get the input address correct and to * | |
3503 | * handle base register modification. * | |
3504 | \***************************************************************************/ | |
3505 | ||
dfcd3bfb JM |
3506 | static void |
3507 | LoadSMult (ARMul_State * state, ARMword instr, | |
3508 | ARMword address, ARMword WBBase) | |
3509 | { | |
3510 | ARMword dest, temp; | |
c906108c | 3511 | |
dfcd3bfb JM |
3512 | UNDEF_LSMNoRegs; |
3513 | UNDEF_LSMPCBase; | |
3514 | UNDEF_LSMBaseInListWb; | |
3515 | BUSUSEDINCPCS; | |
c906108c | 3516 | #ifndef MODE32 |
dfcd3bfb JM |
3517 | if (ADDREXCEPT (address)) |
3518 | { | |
3519 | INTERNALABORT (address); | |
c906108c SS |
3520 | } |
3521 | #endif | |
3522 | ||
dfcd3bfb JM |
3523 | if (!BIT (15) && state->Bank != USERBANK) |
3524 | { | |
3525 | (void) ARMul_SwitchMode (state, state->Mode, USER26MODE); /* temporary reg bank switch */ | |
3526 | UNDEF_LSMUserBankWb; | |
c906108c SS |
3527 | } |
3528 | ||
dfcd3bfb JM |
3529 | if (BIT (21) && LHSReg != 15) |
3530 | LSBase = WBBase; | |
3531 | ||
3532 | for (temp = 0; !BIT (temp); temp++); /* N cycle first */ | |
3533 | dest = ARMul_LoadWordN (state, address); | |
3534 | if (!state->abortSig) | |
3535 | state->Reg[temp++] = dest; | |
3536 | else if (!state->Aborted) | |
3537 | state->Aborted = ARMul_DataAbortV; | |
3538 | ||
3539 | for (; temp < 16; temp++) /* S cycles from here on */ | |
3540 | if (BIT (temp)) | |
3541 | { /* load this register */ | |
3542 | address += 4; | |
3543 | dest = ARMul_LoadWordS (state, address); | |
5d0d395e | 3544 | if (!state->abortSig && !state->Aborted) |
dfcd3bfb JM |
3545 | state->Reg[temp] = dest; |
3546 | else if (!state->Aborted) | |
3547 | state->Aborted = ARMul_DataAbortV; | |
3548 | } | |
3549 | ||
5d0d395e | 3550 | if (BIT (15) && !state->Aborted) |
dfcd3bfb | 3551 | { /* PC is in the reg list */ |
c906108c | 3552 | #ifdef MODE32 |
dfcd3bfb JM |
3553 | if (state->Mode != USER26MODE && state->Mode != USER32MODE) |
3554 | { | |
3555 | state->Cpsr = GETSPSR (state->Bank); | |
3556 | ARMul_CPSRAltered (state); | |
3557 | } | |
13b6dd6f | 3558 | WriteR15 (state, PC); |
c906108c | 3559 | #else |
dfcd3bfb JM |
3560 | if (state->Mode == USER26MODE || state->Mode == USER32MODE) |
3561 | { /* protect bits in user mode */ | |
3562 | ASSIGNN ((state->Reg[15] & NBIT) != 0); | |
3563 | ASSIGNZ ((state->Reg[15] & ZBIT) != 0); | |
3564 | ASSIGNC ((state->Reg[15] & CBIT) != 0); | |
3565 | ASSIGNV ((state->Reg[15] & VBIT) != 0); | |
3566 | } | |
3567 | else | |
3568 | ARMul_R15Altered (state); | |
dfcd3bfb | 3569 | FLUSHPIPE; |
13b6dd6f | 3570 | #endif |
c906108c SS |
3571 | } |
3572 | ||
dfcd3bfb JM |
3573 | if (!BIT (15) && state->Mode != USER26MODE && state->Mode != USER32MODE) |
3574 | (void) ARMul_SwitchMode (state, USER26MODE, state->Mode); /* restore the correct bank */ | |
c906108c | 3575 | |
dfcd3bfb | 3576 | ARMul_Icycles (state, 1, 0L); /* to write back the final register */ |
c906108c | 3577 | |
dfcd3bfb JM |
3578 | if (state->Aborted) |
3579 | { | |
3580 | if (BIT (21) && LHSReg != 15) | |
3581 | LSBase = WBBase; | |
3582 | TAKEABORT; | |
c906108c SS |
3583 | } |
3584 | ||
3585 | } | |
3586 | ||
3587 | /***************************************************************************\ | |
3588 | * This function does the work of storing the registers listed in an STM * | |
3589 | * instruction, when the S bit is clear. The code here is always increment * | |
3590 | * after, it's up to the caller to get the input address correct and to * | |
3591 | * handle base register modification. * | |
3592 | \***************************************************************************/ | |
3593 | ||
dfcd3bfb JM |
3594 | static void |
3595 | StoreMult (ARMul_State * state, ARMword instr, | |
3596 | ARMword address, ARMword WBBase) | |
3597 | { | |
3598 | ARMword temp; | |
c906108c | 3599 | |
dfcd3bfb JM |
3600 | UNDEF_LSMNoRegs; |
3601 | UNDEF_LSMPCBase; | |
3602 | UNDEF_LSMBaseInListWb; | |
3603 | if (!TFLAG) | |
3604 | { | |
3605 | BUSUSEDINCPCN; /* N-cycle, increment the PC and update the NextInstr state */ | |
3606 | } | |
c906108c SS |
3607 | |
3608 | #ifndef MODE32 | |
dfcd3bfb JM |
3609 | if (VECTORACCESS (address) || ADDREXCEPT (address)) |
3610 | { | |
3611 | INTERNALABORT (address); | |
c906108c | 3612 | } |
dfcd3bfb JM |
3613 | if (BIT (15)) |
3614 | PATCHR15; | |
c906108c SS |
3615 | #endif |
3616 | ||
dfcd3bfb | 3617 | for (temp = 0; !BIT (temp); temp++); /* N cycle first */ |
c906108c | 3618 | #ifdef MODE32 |
dfcd3bfb | 3619 | ARMul_StoreWordN (state, address, state->Reg[temp++]); |
c906108c | 3620 | #else |
dfcd3bfb JM |
3621 | if (state->Aborted) |
3622 | { | |
3623 | (void) ARMul_LoadWordN (state, address); | |
3624 | for (; temp < 16; temp++) /* Fake the Stores as Loads */ | |
3625 | if (BIT (temp)) | |
3626 | { /* save this register */ | |
3627 | address += 4; | |
3628 | (void) ARMul_LoadWordS (state, address); | |
3629 | } | |
3630 | if (BIT (21) && LHSReg != 15) | |
3631 | LSBase = WBBase; | |
3632 | TAKEABORT; | |
3633 | return; | |
3634 | } | |
3635 | else | |
3636 | ARMul_StoreWordN (state, address, state->Reg[temp++]); | |
3637 | #endif | |
3638 | if (state->abortSig && !state->Aborted) | |
3639 | state->Aborted = ARMul_DataAbortV; | |
3640 | ||
3641 | if (BIT (21) && LHSReg != 15) | |
3642 | LSBase = WBBase; | |
3643 | ||
3644 | for (; temp < 16; temp++) /* S cycles from here on */ | |
3645 | if (BIT (temp)) | |
3646 | { /* save this register */ | |
3647 | address += 4; | |
3648 | ARMul_StoreWordS (state, address, state->Reg[temp]); | |
3649 | if (state->abortSig && !state->Aborted) | |
3650 | state->Aborted = ARMul_DataAbortV; | |
3651 | } | |
3652 | if (state->Aborted) | |
3653 | { | |
3654 | TAKEABORT; | |
c906108c | 3655 | } |
dfcd3bfb | 3656 | } |
c906108c SS |
3657 | |
3658 | /***************************************************************************\ | |
3659 | * This function does the work of storing the registers listed in an STM * | |
3660 | * instruction when the S bit is set. The code here is always increment * | |
3661 | * after, it's up to the caller to get the input address correct and to * | |
3662 | * handle base register modification. * | |
3663 | \***************************************************************************/ | |
3664 | ||
dfcd3bfb JM |
3665 | static void |
3666 | StoreSMult (ARMul_State * state, ARMword instr, | |
3667 | ARMword address, ARMword WBBase) | |
3668 | { | |
3669 | ARMword temp; | |
c906108c | 3670 | |
dfcd3bfb JM |
3671 | UNDEF_LSMNoRegs; |
3672 | UNDEF_LSMPCBase; | |
3673 | UNDEF_LSMBaseInListWb; | |
3674 | BUSUSEDINCPCN; | |
c906108c | 3675 | #ifndef MODE32 |
dfcd3bfb JM |
3676 | if (VECTORACCESS (address) || ADDREXCEPT (address)) |
3677 | { | |
3678 | INTERNALABORT (address); | |
c906108c | 3679 | } |
dfcd3bfb JM |
3680 | if (BIT (15)) |
3681 | PATCHR15; | |
c906108c SS |
3682 | #endif |
3683 | ||
dfcd3bfb JM |
3684 | if (state->Bank != USERBANK) |
3685 | { | |
3686 | (void) ARMul_SwitchMode (state, state->Mode, USER26MODE); /* Force User Bank */ | |
3687 | UNDEF_LSMUserBankWb; | |
c906108c SS |
3688 | } |
3689 | ||
dfcd3bfb | 3690 | for (temp = 0; !BIT (temp); temp++); /* N cycle first */ |
c906108c | 3691 | #ifdef MODE32 |
dfcd3bfb | 3692 | ARMul_StoreWordN (state, address, state->Reg[temp++]); |
c906108c | 3693 | #else |
dfcd3bfb JM |
3694 | if (state->Aborted) |
3695 | { | |
3696 | (void) ARMul_LoadWordN (state, address); | |
3697 | for (; temp < 16; temp++) /* Fake the Stores as Loads */ | |
3698 | if (BIT (temp)) | |
3699 | { /* save this register */ | |
3700 | address += 4; | |
3701 | (void) ARMul_LoadWordS (state, address); | |
3702 | } | |
3703 | if (BIT (21) && LHSReg != 15) | |
3704 | LSBase = WBBase; | |
3705 | TAKEABORT; | |
3706 | return; | |
c906108c | 3707 | } |
dfcd3bfb JM |
3708 | else |
3709 | ARMul_StoreWordN (state, address, state->Reg[temp++]); | |
c906108c | 3710 | #endif |
dfcd3bfb JM |
3711 | if (state->abortSig && !state->Aborted) |
3712 | state->Aborted = ARMul_DataAbortV; | |
c906108c | 3713 | |
dfcd3bfb JM |
3714 | if (BIT (21) && LHSReg != 15) |
3715 | LSBase = WBBase; | |
c906108c | 3716 | |
dfcd3bfb JM |
3717 | for (; temp < 16; temp++) /* S cycles from here on */ |
3718 | if (BIT (temp)) | |
3719 | { /* save this register */ | |
3720 | address += 4; | |
3721 | ARMul_StoreWordS (state, address, state->Reg[temp]); | |
3722 | if (state->abortSig && !state->Aborted) | |
3723 | state->Aborted = ARMul_DataAbortV; | |
3724 | } | |
c906108c | 3725 | |
dfcd3bfb JM |
3726 | if (state->Mode != USER26MODE && state->Mode != USER32MODE) |
3727 | (void) ARMul_SwitchMode (state, USER26MODE, state->Mode); /* restore the correct bank */ | |
c906108c | 3728 | |
dfcd3bfb JM |
3729 | if (state->Aborted) |
3730 | { | |
3731 | TAKEABORT; | |
c906108c SS |
3732 | } |
3733 | } | |
3734 | ||
3735 | /***************************************************************************\ | |
3736 | * This function does the work of adding two 32bit values together, and * | |
3737 | * calculating if a carry has occurred. * | |
3738 | \***************************************************************************/ | |
3739 | ||
dfcd3bfb JM |
3740 | static ARMword |
3741 | Add32 (ARMword a1, ARMword a2, int *carry) | |
c906108c SS |
3742 | { |
3743 | ARMword result = (a1 + a2); | |
dfcd3bfb JM |
3744 | unsigned int uresult = (unsigned int) result; |
3745 | unsigned int ua1 = (unsigned int) a1; | |
c906108c SS |
3746 | |
3747 | /* If (result == RdLo) and (state->Reg[nRdLo] == 0), | |
3748 | or (result > RdLo) then we have no carry: */ | |
3749 | if ((uresult == ua1) ? (a2 != 0) : (uresult < ua1)) | |
dfcd3bfb | 3750 | *carry = 1; |
c906108c | 3751 | else |
dfcd3bfb | 3752 | *carry = 0; |
c906108c | 3753 | |
dfcd3bfb | 3754 | return (result); |
c906108c SS |
3755 | } |
3756 | ||
3757 | /***************************************************************************\ | |
3758 | * This function does the work of multiplying two 32bit values to give a * | |
3759 | * 64bit result. * | |
3760 | \***************************************************************************/ | |
3761 | ||
dfcd3bfb JM |
3762 | static unsigned |
3763 | Multiply64 (ARMul_State * state, ARMword instr, int msigned, int scc) | |
c906108c | 3764 | { |
dfcd3bfb | 3765 | int nRdHi, nRdLo, nRs, nRm; /* operand register numbers */ |
6d358e86 | 3766 | ARMword RdHi = 0, RdLo = 0, Rm; |
dfcd3bfb | 3767 | int scount; /* cycle count */ |
c906108c | 3768 | |
dfcd3bfb JM |
3769 | nRdHi = BITS (16, 19); |
3770 | nRdLo = BITS (12, 15); | |
3771 | nRs = BITS (8, 11); | |
3772 | nRm = BITS (0, 3); | |
c906108c SS |
3773 | |
3774 | /* Needed to calculate the cycle count: */ | |
3775 | Rm = state->Reg[nRm]; | |
3776 | ||
3777 | /* Check for illegal operand combinations first: */ | |
dfcd3bfb | 3778 | if (nRdHi != 15 |
c906108c | 3779 | && nRdLo != 15 |
dfcd3bfb JM |
3780 | && nRs != 15 |
3781 | && nRm != 15 && nRdHi != nRdLo && nRdHi != nRm && nRdLo != nRm) | |
c906108c | 3782 | { |
dfcd3bfb | 3783 | ARMword lo, mid1, mid2, hi; /* intermediate results */ |
c906108c | 3784 | int carry; |
dfcd3bfb | 3785 | ARMword Rs = state->Reg[nRs]; |
c906108c SS |
3786 | int sign = 0; |
3787 | ||
3788 | if (msigned) | |
3789 | { | |
3790 | /* Compute sign of result and adjust operands if necessary. */ | |
dfcd3bfb | 3791 | |
c906108c | 3792 | sign = (Rm ^ Rs) & 0x80000000; |
dfcd3bfb JM |
3793 | |
3794 | if (((signed long) Rm) < 0) | |
c906108c | 3795 | Rm = -Rm; |
dfcd3bfb JM |
3796 | |
3797 | if (((signed long) Rs) < 0) | |
c906108c SS |
3798 | Rs = -Rs; |
3799 | } | |
dfcd3bfb | 3800 | |
c906108c | 3801 | /* We can split the 32x32 into four 16x16 operations. This ensures |
dfcd3bfb JM |
3802 | that we do not lose precision on 32bit only hosts: */ |
3803 | lo = ((Rs & 0xFFFF) * (Rm & 0xFFFF)); | |
c906108c SS |
3804 | mid1 = ((Rs & 0xFFFF) * ((Rm >> 16) & 0xFFFF)); |
3805 | mid2 = (((Rs >> 16) & 0xFFFF) * (Rm & 0xFFFF)); | |
dfcd3bfb JM |
3806 | hi = (((Rs >> 16) & 0xFFFF) * ((Rm >> 16) & 0xFFFF)); |
3807 | ||
c906108c | 3808 | /* We now need to add all of these results together, taking care |
dfcd3bfb JM |
3809 | to propogate the carries from the additions: */ |
3810 | RdLo = Add32 (lo, (mid1 << 16), &carry); | |
c906108c | 3811 | RdHi = carry; |
dfcd3bfb JM |
3812 | RdLo = Add32 (RdLo, (mid2 << 16), &carry); |
3813 | RdHi += | |
3814 | (carry + ((mid1 >> 16) & 0xFFFF) + ((mid2 >> 16) & 0xFFFF) + hi); | |
c906108c SS |
3815 | |
3816 | if (sign) | |
3817 | { | |
3818 | /* Negate result if necessary. */ | |
dfcd3bfb JM |
3819 | |
3820 | RdLo = ~RdLo; | |
3821 | RdHi = ~RdHi; | |
c906108c SS |
3822 | if (RdLo == 0xFFFFFFFF) |
3823 | { | |
3824 | RdLo = 0; | |
3825 | RdHi += 1; | |
3826 | } | |
3827 | else | |
3828 | RdLo += 1; | |
3829 | } | |
dfcd3bfb | 3830 | |
c906108c SS |
3831 | state->Reg[nRdLo] = RdLo; |
3832 | state->Reg[nRdHi] = RdHi; | |
dfcd3bfb JM |
3833 | } /* else undefined result */ |
3834 | else | |
3835 | fprintf (stderr, "MULTIPLY64 - INVALID ARGUMENTS\n"); | |
3836 | ||
c906108c SS |
3837 | if (scc) |
3838 | { | |
f9c22bc3 AO |
3839 | /* Ensure that both RdHi and RdLo are used to compute Z, but |
3840 | don't let RdLo's sign bit make it to N. */ | |
3841 | ARMul_NegZero (state, RdHi | (RdLo >> 16) | (RdLo & 0xFFFF)); | |
c906108c | 3842 | } |
dfcd3bfb | 3843 | |
c906108c SS |
3844 | /* The cycle count depends on whether the instruction is a signed or |
3845 | unsigned multiply, and what bits are clear in the multiplier: */ | |
dfcd3bfb JM |
3846 | if (msigned && (Rm & ((unsigned) 1 << 31))) |
3847 | Rm = ~Rm; /* invert the bits to make the check against zero */ | |
3848 | ||
c906108c | 3849 | if ((Rm & 0xFFFFFF00) == 0) |
dfcd3bfb | 3850 | scount = 1; |
c906108c | 3851 | else if ((Rm & 0xFFFF0000) == 0) |
dfcd3bfb | 3852 | scount = 2; |
c906108c | 3853 | else if ((Rm & 0xFF000000) == 0) |
dfcd3bfb | 3854 | scount = 3; |
c906108c | 3855 | else |
dfcd3bfb JM |
3856 | scount = 4; |
3857 | ||
3858 | return 2 + scount; | |
c906108c SS |
3859 | } |
3860 | ||
3861 | /***************************************************************************\ | |
3862 | * This function does the work of multiplying two 32bit values and adding * | |
3863 | * a 64bit value to give a 64bit result. * | |
3864 | \***************************************************************************/ | |
3865 | ||
dfcd3bfb JM |
3866 | static unsigned |
3867 | MultiplyAdd64 (ARMul_State * state, ARMword instr, int msigned, int scc) | |
c906108c SS |
3868 | { |
3869 | unsigned scount; | |
3870 | ARMword RdLo, RdHi; | |
3871 | int nRdHi, nRdLo; | |
3872 | int carry = 0; | |
3873 | ||
dfcd3bfb JM |
3874 | nRdHi = BITS (16, 19); |
3875 | nRdLo = BITS (12, 15); | |
c906108c | 3876 | |
dfcd3bfb JM |
3877 | RdHi = state->Reg[nRdHi]; |
3878 | RdLo = state->Reg[nRdLo]; | |
c906108c | 3879 | |
dfcd3bfb | 3880 | scount = Multiply64 (state, instr, msigned, LDEFAULT); |
c906108c | 3881 | |
dfcd3bfb | 3882 | RdLo = Add32 (RdLo, state->Reg[nRdLo], &carry); |
c906108c SS |
3883 | RdHi = (RdHi + state->Reg[nRdHi]) + carry; |
3884 | ||
3885 | state->Reg[nRdLo] = RdLo; | |
3886 | state->Reg[nRdHi] = RdHi; | |
3887 | ||
dfcd3bfb JM |
3888 | if (scc) |
3889 | { | |
ee9a7772 AO |
3890 | /* Ensure that both RdHi and RdLo are used to compute Z, but |
3891 | don't let RdLo's sign bit make it to N. */ | |
3892 | ARMul_NegZero (state, RdHi | (RdLo >> 16) | (RdLo & 0xFFFF)); | |
dfcd3bfb | 3893 | } |
c906108c | 3894 | |
dfcd3bfb | 3895 | return scount + 1; /* extra cycle for addition */ |
c906108c | 3896 | } |