Commit | Line | Data |
---|---|---|
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); | |
27 | static ARMword GetLSRegRHS (ARMul_State * state, ARMword instr); | |
28 | static ARMword GetLS7RHS (ARMul_State * state, ARMword instr); | |
29 | static unsigned LoadWord (ARMul_State * state, ARMword instr, | |
30 | ARMword address); | |
31 | static unsigned LoadHalfWord (ARMul_State * state, ARMword instr, | |
32 | ARMword address, int signextend); | |
33 | static unsigned LoadByte (ARMul_State * state, ARMword instr, ARMword address, | |
34 | int signextend); | |
35 | static unsigned StoreWord (ARMul_State * state, ARMword instr, | |
36 | ARMword address); | |
37 | static unsigned StoreHalfWord (ARMul_State * state, ARMword instr, | |
38 | ARMword address); | |
39 | static unsigned StoreByte (ARMul_State * state, ARMword instr, | |
40 | ARMword address); | |
41 | static void LoadMult (ARMul_State * state, ARMword address, ARMword instr, | |
42 | ARMword WBBase); | |
43 | static void StoreMult (ARMul_State * state, ARMword address, ARMword instr, | |
44 | ARMword WBBase); | |
45 | static void LoadSMult (ARMul_State * state, ARMword address, ARMword instr, | |
46 | ARMword WBBase); | |
47 | static void StoreSMult (ARMul_State * state, ARMword address, ARMword instr, | |
48 | ARMword WBBase); | |
49 | static unsigned Multiply64 (ARMul_State * state, ARMword instr, | |
50 | int signextend, int scc); | |
51 | static unsigned MultiplyAdd64 (ARMul_State * state, ARMword instr, | |
52 | int signextend, int scc); | |
53 | ||
54 | #define LUNSIGNED (0) /* unsigned operation */ | |
55 | #define LSIGNED (1) /* signed operation */ | |
56 | #define LDEFAULT (0) /* default : do nothing */ | |
57 | #define LSCC (1) /* set condition codes on result */ | |
c906108c | 58 | |
7a292a7a SS |
59 | #ifdef NEED_UI_LOOP_HOOK |
60 | /* How often to run the ui_loop update, when in use */ | |
61 | #define UI_LOOP_POLL_INTERVAL 0x32000 | |
62 | ||
63 | /* Counter for the ui_loop_hook update */ | |
64 | static long ui_loop_hook_counter = UI_LOOP_POLL_INTERVAL; | |
65 | ||
66 | /* Actual hook to call to run through gdb's gui event loop */ | |
67 | extern int (*ui_loop_hook) (int); | |
68 | #endif /* NEED_UI_LOOP_HOOK */ | |
69 | ||
70 | extern int stop_simulator; | |
71 | ||
c906108c SS |
72 | /***************************************************************************\ |
73 | * short-hand macros for LDR/STR * | |
74 | \***************************************************************************/ | |
75 | ||
76 | /* store post decrement writeback */ | |
77 | #define SHDOWNWB() \ | |
78 | lhs = LHS ; \ | |
79 | if (StoreHalfWord(state, instr, lhs)) \ | |
80 | LSBase = lhs - GetLS7RHS(state, instr) ; | |
81 | ||
82 | /* store post increment writeback */ | |
83 | #define SHUPWB() \ | |
84 | lhs = LHS ; \ | |
85 | if (StoreHalfWord(state, instr, lhs)) \ | |
86 | LSBase = lhs + GetLS7RHS(state, instr) ; | |
87 | ||
88 | /* store pre decrement */ | |
89 | #define SHPREDOWN() \ | |
90 | (void)StoreHalfWord(state, instr, LHS - GetLS7RHS(state, instr)) ; | |
91 | ||
92 | /* store pre decrement writeback */ | |
93 | #define SHPREDOWNWB() \ | |
94 | temp = LHS - GetLS7RHS(state, instr) ; \ | |
95 | if (StoreHalfWord(state, instr, temp)) \ | |
96 | LSBase = temp ; | |
97 | ||
98 | /* store pre increment */ | |
99 | #define SHPREUP() \ | |
dfcd3bfb | 100 | (void)StoreHalfWord(state, instr, LHS + GetLS7RHS(state, instr)) ; |
c906108c SS |
101 | |
102 | /* store pre increment writeback */ | |
103 | #define SHPREUPWB() \ | |
104 | temp = LHS + GetLS7RHS(state, instr) ; \ | |
105 | if (StoreHalfWord(state, instr, temp)) \ | |
106 | LSBase = temp ; | |
107 | ||
108 | /* load post decrement writeback */ | |
109 | #define LHPOSTDOWN() \ | |
110 | { \ | |
111 | int done = 1 ; \ | |
112 | lhs = LHS ; \ | |
113 | switch (BITS(5,6)) { \ | |
114 | case 1: /* H */ \ | |
115 | if (LoadHalfWord(state,instr,lhs,LUNSIGNED)) \ | |
116 | LSBase = lhs - GetLS7RHS(state,instr) ; \ | |
117 | break ; \ | |
118 | case 2: /* SB */ \ | |
119 | if (LoadByte(state,instr,lhs,LSIGNED)) \ | |
120 | LSBase = lhs - GetLS7RHS(state,instr) ; \ | |
121 | break ; \ | |
122 | case 3: /* SH */ \ | |
123 | if (LoadHalfWord(state,instr,lhs,LSIGNED)) \ | |
124 | LSBase = lhs - GetLS7RHS(state,instr) ; \ | |
125 | break ; \ | |
126 | case 0: /* SWP handled elsewhere */ \ | |
127 | default: \ | |
128 | done = 0 ; \ | |
129 | break ; \ | |
130 | } \ | |
131 | if (done) \ | |
132 | break ; \ | |
133 | } | |
134 | ||
135 | /* load post increment writeback */ | |
136 | #define LHPOSTUP() \ | |
137 | { \ | |
138 | int done = 1 ; \ | |
139 | lhs = LHS ; \ | |
140 | switch (BITS(5,6)) { \ | |
141 | case 1: /* H */ \ | |
142 | if (LoadHalfWord(state,instr,lhs,LUNSIGNED)) \ | |
143 | LSBase = lhs + GetLS7RHS(state,instr) ; \ | |
144 | break ; \ | |
145 | case 2: /* SB */ \ | |
146 | if (LoadByte(state,instr,lhs,LSIGNED)) \ | |
147 | LSBase = lhs + GetLS7RHS(state,instr) ; \ | |
148 | break ; \ | |
149 | case 3: /* SH */ \ | |
150 | if (LoadHalfWord(state,instr,lhs,LSIGNED)) \ | |
151 | LSBase = lhs + GetLS7RHS(state,instr) ; \ | |
152 | break ; \ | |
153 | case 0: /* SWP handled elsewhere */ \ | |
154 | default: \ | |
155 | done = 0 ; \ | |
156 | break ; \ | |
157 | } \ | |
158 | if (done) \ | |
159 | break ; \ | |
160 | } | |
161 | ||
162 | /* load pre decrement */ | |
163 | #define LHPREDOWN() \ | |
164 | { \ | |
165 | int done = 1 ; \ | |
166 | temp = LHS - GetLS7RHS(state,instr) ; \ | |
167 | switch (BITS(5,6)) { \ | |
168 | case 1: /* H */ \ | |
169 | (void)LoadHalfWord(state,instr,temp,LUNSIGNED) ; \ | |
170 | break ; \ | |
171 | case 2: /* SB */ \ | |
172 | (void)LoadByte(state,instr,temp,LSIGNED) ; \ | |
173 | break ; \ | |
174 | case 3: /* SH */ \ | |
175 | (void)LoadHalfWord(state,instr,temp,LSIGNED) ; \ | |
176 | break ; \ | |
177 | case 0: /* SWP handled elsewhere */ \ | |
178 | default: \ | |
179 | done = 0 ; \ | |
180 | break ; \ | |
181 | } \ | |
182 | if (done) \ | |
183 | break ; \ | |
184 | } | |
185 | ||
186 | /* load pre decrement writeback */ | |
187 | #define LHPREDOWNWB() \ | |
188 | { \ | |
189 | int done = 1 ; \ | |
190 | temp = LHS - GetLS7RHS(state, instr) ; \ | |
191 | switch (BITS(5,6)) { \ | |
192 | case 1: /* H */ \ | |
193 | if (LoadHalfWord(state,instr,temp,LUNSIGNED)) \ | |
194 | LSBase = temp ; \ | |
195 | break ; \ | |
196 | case 2: /* SB */ \ | |
197 | if (LoadByte(state,instr,temp,LSIGNED)) \ | |
198 | LSBase = temp ; \ | |
199 | break ; \ | |
200 | case 3: /* SH */ \ | |
201 | if (LoadHalfWord(state,instr,temp,LSIGNED)) \ | |
202 | LSBase = temp ; \ | |
203 | break ; \ | |
204 | case 0: /* SWP handled elsewhere */ \ | |
205 | default: \ | |
206 | done = 0 ; \ | |
207 | break ; \ | |
208 | } \ | |
209 | if (done) \ | |
210 | break ; \ | |
211 | } | |
212 | ||
213 | /* load pre increment */ | |
214 | #define LHPREUP() \ | |
215 | { \ | |
216 | int done = 1 ; \ | |
217 | temp = LHS + GetLS7RHS(state,instr) ; \ | |
218 | switch (BITS(5,6)) { \ | |
219 | case 1: /* H */ \ | |
220 | (void)LoadHalfWord(state,instr,temp,LUNSIGNED) ; \ | |
221 | break ; \ | |
222 | case 2: /* SB */ \ | |
223 | (void)LoadByte(state,instr,temp,LSIGNED) ; \ | |
224 | break ; \ | |
225 | case 3: /* SH */ \ | |
226 | (void)LoadHalfWord(state,instr,temp,LSIGNED) ; \ | |
227 | break ; \ | |
228 | case 0: /* SWP handled elsewhere */ \ | |
229 | default: \ | |
230 | done = 0 ; \ | |
231 | break ; \ | |
232 | } \ | |
233 | if (done) \ | |
234 | break ; \ | |
235 | } | |
236 | ||
237 | /* load pre increment writeback */ | |
238 | #define LHPREUPWB() \ | |
239 | { \ | |
240 | int done = 1 ; \ | |
241 | temp = LHS + GetLS7RHS(state, instr) ; \ | |
242 | switch (BITS(5,6)) { \ | |
243 | case 1: /* H */ \ | |
244 | if (LoadHalfWord(state,instr,temp,LUNSIGNED)) \ | |
245 | LSBase = temp ; \ | |
246 | break ; \ | |
247 | case 2: /* SB */ \ | |
248 | if (LoadByte(state,instr,temp,LSIGNED)) \ | |
249 | LSBase = temp ; \ | |
250 | break ; \ | |
251 | case 3: /* SH */ \ | |
252 | if (LoadHalfWord(state,instr,temp,LSIGNED)) \ | |
253 | LSBase = temp ; \ | |
254 | break ; \ | |
255 | case 0: /* SWP handled elsewhere */ \ | |
256 | default: \ | |
257 | done = 0 ; \ | |
258 | break ; \ | |
259 | } \ | |
260 | if (done) \ | |
261 | break ; \ | |
262 | } | |
263 | ||
264 | /***************************************************************************\ | |
265 | * EMULATION of ARM6 * | |
266 | \***************************************************************************/ | |
267 | ||
268 | /* The PC pipeline value depends on whether ARM or Thumb instructions | |
269 | are being executed: */ | |
270 | ARMword isize; | |
271 | ||
272 | #ifdef MODE32 | |
dfcd3bfb JM |
273 | ARMword |
274 | ARMul_Emulate32 (register ARMul_State * state) | |
c906108c SS |
275 | { |
276 | #else | |
dfcd3bfb JM |
277 | ARMword |
278 | ARMul_Emulate26 (register ARMul_State * state) | |
c906108c SS |
279 | { |
280 | #endif | |
dfcd3bfb JM |
281 | register ARMword instr, /* the current instruction */ |
282 | dest, /* almost the DestBus */ | |
283 | temp, /* ubiquitous third hand */ | |
284 | pc; /* the address of the current instruction */ | |
285 | ARMword lhs, rhs; /* almost the ABus and BBus */ | |
286 | ARMword decoded, loaded; /* instruction pipeline */ | |
c906108c SS |
287 | |
288 | /***************************************************************************\ | |
289 | * Execute the next instruction * | |
290 | \***************************************************************************/ | |
291 | ||
dfcd3bfb JM |
292 | if (state->NextInstr < PRIMEPIPE) |
293 | { | |
294 | decoded = state->decoded; | |
295 | loaded = state->loaded; | |
296 | pc = state->pc; | |
c906108c SS |
297 | } |
298 | ||
dfcd3bfb JM |
299 | do |
300 | { /* just keep going */ | |
c906108c | 301 | #ifdef MODET |
dfcd3bfb JM |
302 | if (TFLAG) |
303 | { | |
304 | isize = 2; | |
305 | } | |
306 | else | |
307 | #endif | |
308 | isize = 4; | |
309 | switch (state->NextInstr) | |
310 | { | |
311 | case SEQ: | |
312 | state->Reg[15] += isize; /* Advance the pipeline, and an S cycle */ | |
313 | pc += isize; | |
314 | instr = decoded; | |
315 | decoded = loaded; | |
316 | loaded = ARMul_LoadInstrS (state, pc + (isize * 2), isize); | |
317 | break; | |
318 | ||
319 | case NONSEQ: | |
320 | state->Reg[15] += isize; /* Advance the pipeline, and an N cycle */ | |
321 | pc += isize; | |
322 | instr = decoded; | |
323 | decoded = loaded; | |
324 | loaded = ARMul_LoadInstrN (state, pc + (isize * 2), isize); | |
325 | NORMALCYCLE; | |
326 | break; | |
327 | ||
328 | case PCINCEDSEQ: | |
329 | pc += isize; /* Program counter advanced, and an S cycle */ | |
330 | instr = decoded; | |
331 | decoded = loaded; | |
332 | loaded = ARMul_LoadInstrS (state, pc + (isize * 2), isize); | |
333 | NORMALCYCLE; | |
334 | break; | |
335 | ||
336 | case PCINCEDNONSEQ: | |
337 | pc += isize; /* Program counter advanced, and an N cycle */ | |
338 | instr = decoded; | |
339 | decoded = loaded; | |
340 | loaded = ARMul_LoadInstrN (state, pc + (isize * 2), isize); | |
341 | NORMALCYCLE; | |
342 | break; | |
343 | ||
344 | case RESUME: /* The program counter has been changed */ | |
345 | pc = state->Reg[15]; | |
c906108c | 346 | #ifndef MODE32 |
dfcd3bfb JM |
347 | pc = pc & R15PCBITS; |
348 | #endif | |
349 | state->Reg[15] = pc + (isize * 2); | |
350 | state->Aborted = 0; | |
351 | instr = ARMul_ReLoadInstr (state, pc, isize); | |
352 | decoded = ARMul_ReLoadInstr (state, pc + isize, isize); | |
353 | loaded = ARMul_ReLoadInstr (state, pc + isize * 2, isize); | |
354 | NORMALCYCLE; | |
355 | break; | |
356 | ||
357 | default: /* The program counter has been changed */ | |
358 | pc = state->Reg[15]; | |
c906108c | 359 | #ifndef MODE32 |
dfcd3bfb JM |
360 | pc = pc & R15PCBITS; |
361 | #endif | |
362 | state->Reg[15] = pc + (isize * 2); | |
363 | state->Aborted = 0; | |
364 | instr = ARMul_LoadInstrN (state, pc, isize); | |
365 | decoded = ARMul_LoadInstrS (state, pc + (isize), isize); | |
366 | loaded = ARMul_LoadInstrS (state, pc + (isize * 2), isize); | |
367 | NORMALCYCLE; | |
368 | break; | |
369 | } | |
370 | if (state->EventSet) | |
371 | ARMul_EnvokeEvent (state); | |
372 | ||
c906108c | 373 | #if 0 |
dfcd3bfb JM |
374 | /* Enable this for a helpful bit of debugging when tracing is needed. */ |
375 | fprintf (stderr, "pc: %x, instr: %x\n", pc & ~1, instr); | |
376 | if (instr == 0) | |
377 | abort (); | |
378 | #endif | |
379 | ||
380 | if (state->Exception) | |
381 | { /* Any exceptions */ | |
382 | if (state->NresetSig == LOW) | |
383 | { | |
384 | ARMul_Abort (state, ARMul_ResetV); | |
385 | break; | |
386 | } | |
387 | else if (!state->NfiqSig && !FFLAG) | |
388 | { | |
389 | ARMul_Abort (state, ARMul_FIQV); | |
390 | break; | |
391 | } | |
392 | else if (!state->NirqSig && !IFLAG) | |
393 | { | |
394 | ARMul_Abort (state, ARMul_IRQV); | |
395 | break; | |
396 | } | |
397 | } | |
398 | ||
399 | if (state->CallDebug > 0) | |
400 | { | |
401 | instr = ARMul_Debug (state, pc, instr); | |
402 | if (state->Emulate < ONCE) | |
403 | { | |
404 | state->NextInstr = RESUME; | |
405 | break; | |
406 | } | |
407 | if (state->Debug) | |
408 | { | |
409 | fprintf (stderr, "At %08lx Instr %08lx Mode %02lx\n", pc, instr, | |
410 | state->Mode); | |
411 | (void) fgetc (stdin); | |
412 | } | |
413 | } | |
414 | else if (state->Emulate < ONCE) | |
415 | { | |
416 | state->NextInstr = RESUME; | |
417 | break; | |
418 | } | |
419 | ||
420 | state->NumInstrs++; | |
c906108c SS |
421 | |
422 | #ifdef MODET | |
dfcd3bfb JM |
423 | /* Provide Thumb instruction decoding. If the processor is in Thumb |
424 | mode, then we can simply decode the Thumb instruction, and map it | |
425 | to the corresponding ARM instruction (by directly loading the | |
426 | instr variable, and letting the normal ARM simulator | |
427 | execute). There are some caveats to ensure that the correct | |
428 | pipelined PC value is used when executing Thumb code, and also for | |
429 | dealing with the BL instruction. */ | |
430 | if (TFLAG) | |
431 | { /* check if in Thumb mode */ | |
432 | ARMword new; | |
433 | switch (ARMul_ThumbDecode (state, pc, instr, &new)) | |
434 | { | |
435 | case t_undefined: | |
436 | ARMul_UndefInstr (state, instr); /* This is a Thumb instruction */ | |
437 | break; | |
438 | ||
439 | case t_branch: /* already processed */ | |
440 | goto donext; | |
441 | ||
442 | case t_decoded: /* ARM instruction available */ | |
443 | instr = new; /* so continue instruction decoding */ | |
444 | break; | |
445 | } | |
446 | } | |
c906108c SS |
447 | #endif |
448 | ||
449 | /***************************************************************************\ | |
450 | * Check the condition codes * | |
451 | \***************************************************************************/ | |
dfcd3bfb JM |
452 | if ((temp = TOPBITS (28)) == AL) |
453 | goto mainswitch; /* vile deed in the need for speed */ | |
454 | ||
455 | switch ((int) TOPBITS (28)) | |
456 | { /* check the condition code */ | |
457 | case AL: | |
458 | temp = TRUE; | |
459 | break; | |
460 | case NV: | |
461 | temp = FALSE; | |
462 | break; | |
463 | case EQ: | |
464 | temp = ZFLAG; | |
465 | break; | |
466 | case NE: | |
467 | temp = !ZFLAG; | |
468 | break; | |
469 | case VS: | |
470 | temp = VFLAG; | |
471 | break; | |
472 | case VC: | |
473 | temp = !VFLAG; | |
474 | break; | |
475 | case MI: | |
476 | temp = NFLAG; | |
477 | break; | |
478 | case PL: | |
479 | temp = !NFLAG; | |
480 | break; | |
481 | case CS: | |
482 | temp = CFLAG; | |
483 | break; | |
484 | case CC: | |
485 | temp = !CFLAG; | |
486 | break; | |
487 | case HI: | |
488 | temp = (CFLAG && !ZFLAG); | |
489 | break; | |
490 | case LS: | |
491 | temp = (!CFLAG || ZFLAG); | |
492 | break; | |
493 | case GE: | |
494 | temp = ((!NFLAG && !VFLAG) || (NFLAG && VFLAG)); | |
495 | break; | |
496 | case LT: | |
497 | temp = ((NFLAG && !VFLAG) || (!NFLAG && VFLAG)); | |
498 | break; | |
499 | case GT: | |
500 | temp = ((!NFLAG && !VFLAG && !ZFLAG) || (NFLAG && VFLAG && !ZFLAG)); | |
501 | break; | |
502 | case LE: | |
503 | temp = ((NFLAG && !VFLAG) || (!NFLAG && VFLAG)) || ZFLAG; | |
504 | break; | |
505 | } /* cc check */ | |
c906108c SS |
506 | |
507 | /***************************************************************************\ | |
508 | * Actual execution of instructions begins here * | |
509 | \***************************************************************************/ | |
510 | ||
dfcd3bfb JM |
511 | if (temp) |
512 | { /* if the condition codes don't match, stop here */ | |
513 | mainswitch: | |
c906108c | 514 | |
dfcd3bfb JM |
515 | |
516 | switch ((int) BITS (20, 27)) | |
517 | { | |
c906108c SS |
518 | |
519 | /***************************************************************************\ | |
520 | * Data Processing Register RHS Instructions * | |
521 | \***************************************************************************/ | |
522 | ||
dfcd3bfb | 523 | case 0x00: /* AND reg and MUL */ |
c906108c | 524 | #ifdef MODET |
dfcd3bfb JM |
525 | if (BITS (4, 11) == 0xB) |
526 | { | |
527 | /* STRH register offset, no write-back, down, post indexed */ | |
528 | SHDOWNWB (); | |
529 | break; | |
530 | } | |
531 | /* TODO: CHECK: should 0xD and 0xF generate undefined intruction aborts? */ | |
532 | #endif | |
533 | if (BITS (4, 7) == 9) | |
534 | { /* MUL */ | |
535 | rhs = state->Reg[MULRHSReg]; | |
536 | if (MULLHSReg == MULDESTReg) | |
537 | { | |
538 | UNDEF_MULDestEQOp1; | |
539 | state->Reg[MULDESTReg] = 0; | |
540 | } | |
541 | else if (MULDESTReg != 15) | |
542 | state->Reg[MULDESTReg] = state->Reg[MULLHSReg] * rhs; | |
543 | else | |
544 | { | |
545 | UNDEF_MULPCDest; | |
546 | } | |
547 | for (dest = 0, temp = 0; dest < 32; dest++) | |
548 | if (rhs & (1L << dest)) | |
549 | temp = dest; /* mult takes this many/2 I cycles */ | |
550 | ARMul_Icycles (state, ARMul_MultTable[temp], 0L); | |
551 | } | |
552 | else | |
553 | { /* AND reg */ | |
554 | rhs = DPRegRHS; | |
555 | dest = LHS & rhs; | |
556 | WRITEDEST (dest); | |
557 | } | |
558 | break; | |
559 | ||
560 | case 0x01: /* ANDS reg and MULS */ | |
c906108c | 561 | #ifdef MODET |
dfcd3bfb JM |
562 | if ((BITS (4, 11) & 0xF9) == 0x9) |
563 | { | |
564 | /* LDR register offset, no write-back, down, post indexed */ | |
565 | LHPOSTDOWN (); | |
566 | /* fall through to rest of decoding */ | |
567 | } | |
568 | #endif | |
569 | if (BITS (4, 7) == 9) | |
570 | { /* MULS */ | |
571 | rhs = state->Reg[MULRHSReg]; | |
572 | if (MULLHSReg == MULDESTReg) | |
573 | { | |
574 | UNDEF_MULDestEQOp1; | |
575 | state->Reg[MULDESTReg] = 0; | |
576 | CLEARN; | |
577 | SETZ; | |
578 | } | |
579 | else if (MULDESTReg != 15) | |
580 | { | |
581 | dest = state->Reg[MULLHSReg] * rhs; | |
582 | ARMul_NegZero (state, dest); | |
583 | state->Reg[MULDESTReg] = dest; | |
584 | } | |
585 | else | |
586 | { | |
587 | UNDEF_MULPCDest; | |
588 | } | |
589 | for (dest = 0, temp = 0; dest < 32; dest++) | |
590 | if (rhs & (1L << dest)) | |
591 | temp = dest; /* mult takes this many/2 I cycles */ | |
592 | ARMul_Icycles (state, ARMul_MultTable[temp], 0L); | |
593 | } | |
594 | else | |
595 | { /* ANDS reg */ | |
596 | rhs = DPSRegRHS; | |
597 | dest = LHS & rhs; | |
598 | WRITESDEST (dest); | |
599 | } | |
600 | break; | |
601 | ||
602 | case 0x02: /* EOR reg and MLA */ | |
c906108c | 603 | #ifdef MODET |
dfcd3bfb JM |
604 | if (BITS (4, 11) == 0xB) |
605 | { | |
606 | /* STRH register offset, write-back, down, post indexed */ | |
607 | SHDOWNWB (); | |
608 | break; | |
609 | } | |
610 | #endif | |
611 | if (BITS (4, 7) == 9) | |
612 | { /* MLA */ | |
613 | rhs = state->Reg[MULRHSReg]; | |
614 | if (MULLHSReg == MULDESTReg) | |
615 | { | |
616 | UNDEF_MULDestEQOp1; | |
617 | state->Reg[MULDESTReg] = state->Reg[MULACCReg]; | |
618 | } | |
619 | else if (MULDESTReg != 15) | |
620 | state->Reg[MULDESTReg] = | |
621 | state->Reg[MULLHSReg] * rhs + state->Reg[MULACCReg]; | |
622 | else | |
623 | { | |
624 | UNDEF_MULPCDest; | |
625 | } | |
626 | for (dest = 0, temp = 0; dest < 32; dest++) | |
627 | if (rhs & (1L << dest)) | |
628 | temp = dest; /* mult takes this many/2 I cycles */ | |
629 | ARMul_Icycles (state, ARMul_MultTable[temp], 0L); | |
630 | } | |
631 | else | |
632 | { | |
633 | rhs = DPRegRHS; | |
634 | dest = LHS ^ rhs; | |
635 | WRITEDEST (dest); | |
636 | } | |
637 | break; | |
638 | ||
639 | case 0x03: /* EORS reg and MLAS */ | |
c906108c | 640 | #ifdef MODET |
dfcd3bfb JM |
641 | if ((BITS (4, 11) & 0xF9) == 0x9) |
642 | { | |
643 | /* LDR register offset, write-back, down, post-indexed */ | |
644 | LHPOSTDOWN (); | |
645 | /* fall through to rest of the decoding */ | |
646 | } | |
647 | #endif | |
648 | if (BITS (4, 7) == 9) | |
649 | { /* MLAS */ | |
650 | rhs = state->Reg[MULRHSReg]; | |
651 | if (MULLHSReg == MULDESTReg) | |
652 | { | |
653 | UNDEF_MULDestEQOp1; | |
654 | dest = state->Reg[MULACCReg]; | |
655 | ARMul_NegZero (state, dest); | |
656 | state->Reg[MULDESTReg] = dest; | |
657 | } | |
658 | else if (MULDESTReg != 15) | |
659 | { | |
660 | dest = | |
661 | state->Reg[MULLHSReg] * rhs + state->Reg[MULACCReg]; | |
662 | ARMul_NegZero (state, dest); | |
663 | state->Reg[MULDESTReg] = dest; | |
664 | } | |
665 | else | |
666 | { | |
667 | UNDEF_MULPCDest; | |
668 | } | |
669 | for (dest = 0, temp = 0; dest < 32; dest++) | |
670 | if (rhs & (1L << dest)) | |
671 | temp = dest; /* mult takes this many/2 I cycles */ | |
672 | ARMul_Icycles (state, ARMul_MultTable[temp], 0L); | |
673 | } | |
674 | else | |
675 | { /* EORS Reg */ | |
676 | rhs = DPSRegRHS; | |
677 | dest = LHS ^ rhs; | |
678 | WRITESDEST (dest); | |
679 | } | |
680 | break; | |
681 | ||
682 | case 0x04: /* SUB reg */ | |
c906108c | 683 | #ifdef MODET |
dfcd3bfb JM |
684 | if (BITS (4, 7) == 0xB) |
685 | { | |
686 | /* STRH immediate offset, no write-back, down, post indexed */ | |
687 | SHDOWNWB (); | |
688 | break; | |
689 | } | |
690 | #endif | |
691 | rhs = DPRegRHS; | |
692 | dest = LHS - rhs; | |
693 | WRITEDEST (dest); | |
694 | break; | |
695 | ||
696 | case 0x05: /* SUBS reg */ | |
c906108c | 697 | #ifdef MODET |
dfcd3bfb JM |
698 | if ((BITS (4, 7) & 0x9) == 0x9) |
699 | { | |
700 | /* LDR immediate offset, no write-back, down, post indexed */ | |
701 | LHPOSTDOWN (); | |
702 | /* fall through to the rest of the instruction decoding */ | |
703 | } | |
704 | #endif | |
705 | lhs = LHS; | |
706 | rhs = DPRegRHS; | |
707 | dest = lhs - rhs; | |
708 | if ((lhs >= rhs) || ((rhs | lhs) >> 31)) | |
709 | { | |
710 | ARMul_SubCarry (state, lhs, rhs, dest); | |
711 | ARMul_SubOverflow (state, lhs, rhs, dest); | |
712 | } | |
713 | else | |
714 | { | |
715 | CLEARC; | |
716 | CLEARV; | |
717 | } | |
718 | WRITESDEST (dest); | |
719 | break; | |
720 | ||
721 | case 0x06: /* RSB reg */ | |
c906108c | 722 | #ifdef MODET |
dfcd3bfb JM |
723 | if (BITS (4, 7) == 0xB) |
724 | { | |
725 | /* STRH immediate offset, write-back, down, post indexed */ | |
726 | SHDOWNWB (); | |
727 | break; | |
728 | } | |
729 | #endif | |
730 | rhs = DPRegRHS; | |
731 | dest = rhs - LHS; | |
732 | WRITEDEST (dest); | |
733 | break; | |
734 | ||
735 | case 0x07: /* RSBS reg */ | |
c906108c | 736 | #ifdef MODET |
dfcd3bfb JM |
737 | if ((BITS (4, 7) & 0x9) == 0x9) |
738 | { | |
739 | /* LDR immediate offset, write-back, down, post indexed */ | |
740 | LHPOSTDOWN (); | |
741 | /* fall through to remainder of instruction decoding */ | |
742 | } | |
743 | #endif | |
744 | lhs = LHS; | |
745 | rhs = DPRegRHS; | |
746 | dest = rhs - lhs; | |
747 | if ((rhs >= lhs) || ((rhs | lhs) >> 31)) | |
748 | { | |
749 | ARMul_SubCarry (state, rhs, lhs, dest); | |
750 | ARMul_SubOverflow (state, rhs, lhs, dest); | |
751 | } | |
752 | else | |
753 | { | |
754 | CLEARC; | |
755 | CLEARV; | |
756 | } | |
757 | WRITESDEST (dest); | |
758 | break; | |
759 | ||
760 | case 0x08: /* ADD reg */ | |
c906108c | 761 | #ifdef MODET |
dfcd3bfb JM |
762 | if (BITS (4, 11) == 0xB) |
763 | { | |
764 | /* STRH register offset, no write-back, up, post indexed */ | |
765 | SHUPWB (); | |
766 | break; | |
767 | } | |
c906108c SS |
768 | #endif |
769 | #ifdef MODET | |
dfcd3bfb JM |
770 | if (BITS (4, 7) == 0x9) |
771 | { /* MULL */ | |
772 | /* 32x32 = 64 */ | |
773 | ARMul_Icycles (state, | |
774 | Multiply64 (state, instr, LUNSIGNED, | |
775 | LDEFAULT), 0L); | |
776 | break; | |
777 | } | |
778 | #endif | |
779 | rhs = DPRegRHS; | |
780 | dest = LHS + rhs; | |
781 | WRITEDEST (dest); | |
782 | break; | |
783 | ||
784 | case 0x09: /* ADDS reg */ | |
c906108c | 785 | #ifdef MODET |
dfcd3bfb JM |
786 | if ((BITS (4, 11) & 0xF9) == 0x9) |
787 | { | |
788 | /* LDR register offset, no write-back, up, post indexed */ | |
789 | LHPOSTUP (); | |
790 | /* fall through to remaining instruction decoding */ | |
791 | } | |
c906108c SS |
792 | #endif |
793 | #ifdef MODET | |
dfcd3bfb JM |
794 | if (BITS (4, 7) == 0x9) |
795 | { /* MULL */ | |
796 | /* 32x32=64 */ | |
797 | ARMul_Icycles (state, | |
798 | Multiply64 (state, instr, LUNSIGNED, LSCC), | |
799 | 0L); | |
800 | break; | |
801 | } | |
802 | #endif | |
803 | lhs = LHS; | |
804 | rhs = DPRegRHS; | |
805 | dest = lhs + rhs; | |
806 | ASSIGNZ (dest == 0); | |
807 | if ((lhs | rhs) >> 30) | |
808 | { /* possible C,V,N to set */ | |
809 | ASSIGNN (NEG (dest)); | |
810 | ARMul_AddCarry (state, lhs, rhs, dest); | |
811 | ARMul_AddOverflow (state, lhs, rhs, dest); | |
812 | } | |
813 | else | |
814 | { | |
815 | CLEARN; | |
816 | CLEARC; | |
817 | CLEARV; | |
818 | } | |
819 | WRITESDEST (dest); | |
820 | break; | |
821 | ||
822 | case 0x0a: /* ADC reg */ | |
c906108c | 823 | #ifdef MODET |
dfcd3bfb JM |
824 | if (BITS (4, 11) == 0xB) |
825 | { | |
826 | /* STRH register offset, write-back, up, post-indexed */ | |
827 | SHUPWB (); | |
828 | break; | |
829 | } | |
c906108c SS |
830 | #endif |
831 | #ifdef MODET | |
dfcd3bfb JM |
832 | if (BITS (4, 7) == 0x9) |
833 | { /* MULL */ | |
834 | /* 32x32=64 */ | |
835 | ARMul_Icycles (state, | |
836 | MultiplyAdd64 (state, instr, LUNSIGNED, | |
837 | LDEFAULT), 0L); | |
838 | break; | |
839 | } | |
840 | #endif | |
841 | rhs = DPRegRHS; | |
842 | dest = LHS + rhs + CFLAG; | |
843 | WRITEDEST (dest); | |
844 | break; | |
845 | ||
846 | case 0x0b: /* ADCS reg */ | |
c906108c | 847 | #ifdef MODET |
dfcd3bfb JM |
848 | if ((BITS (4, 11) & 0xF9) == 0x9) |
849 | { | |
850 | /* LDR register offset, write-back, up, post indexed */ | |
851 | LHPOSTUP (); | |
852 | /* fall through to remaining instruction decoding */ | |
853 | } | |
c906108c SS |
854 | #endif |
855 | #ifdef MODET | |
dfcd3bfb JM |
856 | if (BITS (4, 7) == 0x9) |
857 | { /* MULL */ | |
858 | /* 32x32=64 */ | |
859 | ARMul_Icycles (state, | |
860 | MultiplyAdd64 (state, instr, LUNSIGNED, | |
861 | LSCC), 0L); | |
862 | break; | |
863 | } | |
864 | #endif | |
865 | lhs = LHS; | |
866 | rhs = DPRegRHS; | |
867 | dest = lhs + rhs + CFLAG; | |
868 | ASSIGNZ (dest == 0); | |
869 | if ((lhs | rhs) >> 30) | |
870 | { /* possible C,V,N to set */ | |
871 | ASSIGNN (NEG (dest)); | |
872 | ARMul_AddCarry (state, lhs, rhs, dest); | |
873 | ARMul_AddOverflow (state, lhs, rhs, dest); | |
874 | } | |
875 | else | |
876 | { | |
877 | CLEARN; | |
878 | CLEARC; | |
879 | CLEARV; | |
880 | } | |
881 | WRITESDEST (dest); | |
882 | break; | |
883 | ||
884 | case 0x0c: /* SBC reg */ | |
c906108c | 885 | #ifdef MODET |
dfcd3bfb JM |
886 | if (BITS (4, 7) == 0xB) |
887 | { | |
888 | /* STRH immediate offset, no write-back, up post indexed */ | |
889 | SHUPWB (); | |
890 | break; | |
891 | } | |
c906108c SS |
892 | #endif |
893 | #ifdef MODET | |
dfcd3bfb JM |
894 | if (BITS (4, 7) == 0x9) |
895 | { /* MULL */ | |
896 | /* 32x32=64 */ | |
897 | ARMul_Icycles (state, | |
898 | Multiply64 (state, instr, LSIGNED, LDEFAULT), | |
899 | 0L); | |
900 | break; | |
901 | } | |
902 | #endif | |
903 | rhs = DPRegRHS; | |
904 | dest = LHS - rhs - !CFLAG; | |
905 | WRITEDEST (dest); | |
906 | break; | |
907 | ||
908 | case 0x0d: /* SBCS reg */ | |
c906108c | 909 | #ifdef MODET |
dfcd3bfb JM |
910 | if ((BITS (4, 7) & 0x9) == 0x9) |
911 | { | |
912 | /* LDR immediate offset, no write-back, up, post indexed */ | |
913 | LHPOSTUP (); | |
914 | } | |
c906108c SS |
915 | #endif |
916 | #ifdef MODET | |
dfcd3bfb JM |
917 | if (BITS (4, 7) == 0x9) |
918 | { /* MULL */ | |
919 | /* 32x32=64 */ | |
920 | ARMul_Icycles (state, | |
921 | Multiply64 (state, instr, LSIGNED, LSCC), | |
922 | 0L); | |
923 | break; | |
924 | } | |
925 | #endif | |
926 | lhs = LHS; | |
927 | rhs = DPRegRHS; | |
928 | dest = lhs - rhs - !CFLAG; | |
929 | if ((lhs >= rhs) || ((rhs | lhs) >> 31)) | |
930 | { | |
931 | ARMul_SubCarry (state, lhs, rhs, dest); | |
932 | ARMul_SubOverflow (state, lhs, rhs, dest); | |
933 | } | |
934 | else | |
935 | { | |
936 | CLEARC; | |
937 | CLEARV; | |
938 | } | |
939 | WRITESDEST (dest); | |
940 | break; | |
941 | ||
942 | case 0x0e: /* RSC reg */ | |
c906108c | 943 | #ifdef MODET |
dfcd3bfb JM |
944 | if (BITS (4, 7) == 0xB) |
945 | { | |
946 | /* STRH immediate offset, write-back, up, post indexed */ | |
947 | SHUPWB (); | |
948 | break; | |
949 | } | |
c906108c SS |
950 | #endif |
951 | #ifdef MODET | |
dfcd3bfb JM |
952 | if (BITS (4, 7) == 0x9) |
953 | { /* MULL */ | |
954 | /* 32x32=64 */ | |
955 | ARMul_Icycles (state, | |
956 | MultiplyAdd64 (state, instr, LSIGNED, | |
957 | LDEFAULT), 0L); | |
958 | break; | |
959 | } | |
960 | #endif | |
961 | rhs = DPRegRHS; | |
962 | dest = rhs - LHS - !CFLAG; | |
963 | WRITEDEST (dest); | |
964 | break; | |
965 | ||
966 | case 0x0f: /* RSCS reg */ | |
c906108c | 967 | #ifdef MODET |
dfcd3bfb JM |
968 | if ((BITS (4, 7) & 0x9) == 0x9) |
969 | { | |
970 | /* LDR immediate offset, write-back, up, post indexed */ | |
971 | LHPOSTUP (); | |
972 | /* fall through to remaining instruction decoding */ | |
973 | } | |
c906108c SS |
974 | #endif |
975 | #ifdef MODET | |
dfcd3bfb JM |
976 | if (BITS (4, 7) == 0x9) |
977 | { /* MULL */ | |
978 | /* 32x32=64 */ | |
979 | ARMul_Icycles (state, | |
980 | MultiplyAdd64 (state, instr, LSIGNED, LSCC), | |
981 | 0L); | |
982 | break; | |
983 | } | |
984 | #endif | |
985 | lhs = LHS; | |
986 | rhs = DPRegRHS; | |
987 | dest = rhs - lhs - !CFLAG; | |
988 | if ((rhs >= lhs) || ((rhs | lhs) >> 31)) | |
989 | { | |
990 | ARMul_SubCarry (state, rhs, lhs, dest); | |
991 | ARMul_SubOverflow (state, rhs, lhs, dest); | |
992 | } | |
993 | else | |
994 | { | |
995 | CLEARC; | |
996 | CLEARV; | |
997 | } | |
998 | WRITESDEST (dest); | |
999 | break; | |
1000 | ||
1001 | case 0x10: /* TST reg and MRS CPSR and SWP word */ | |
c906108c | 1002 | #ifdef MODET |
dfcd3bfb JM |
1003 | if (BITS (4, 11) == 0xB) |
1004 | { | |
1005 | /* STRH register offset, no write-back, down, pre indexed */ | |
1006 | SHPREDOWN (); | |
1007 | break; | |
1008 | } | |
1009 | #endif | |
1010 | if (BITS (4, 11) == 9) | |
1011 | { /* SWP */ | |
1012 | UNDEF_SWPPC; | |
1013 | temp = LHS; | |
1014 | BUSUSEDINCPCS; | |
c906108c | 1015 | #ifndef MODE32 |
dfcd3bfb JM |
1016 | if (VECTORACCESS (temp) || ADDREXCEPT (temp)) |
1017 | { | |
1018 | INTERNALABORT (temp); | |
1019 | (void) ARMul_LoadWordN (state, temp); | |
1020 | (void) ARMul_LoadWordN (state, temp); | |
1021 | } | |
1022 | else | |
1023 | #endif | |
1024 | dest = ARMul_SwapWord (state, temp, state->Reg[RHSReg]); | |
1025 | if (temp & 3) | |
1026 | DEST = ARMul_Align (state, temp, dest); | |
1027 | else | |
1028 | DEST = dest; | |
1029 | if (state->abortSig || state->Aborted) | |
1030 | { | |
1031 | TAKEABORT; | |
1032 | } | |
1033 | } | |
1034 | else if ((BITS (0, 11) == 0) && (LHSReg == 15)) | |
1035 | { /* MRS CPSR */ | |
1036 | UNDEF_MRSPC; | |
1037 | DEST = ECC | EINT | EMODE; | |
1038 | } | |
1039 | else | |
1040 | { | |
1041 | UNDEF_Test; | |
1042 | } | |
1043 | break; | |
1044 | ||
1045 | case 0x11: /* TSTP reg */ | |
c906108c | 1046 | #ifdef MODET |
dfcd3bfb JM |
1047 | if ((BITS (4, 11) & 0xF9) == 0x9) |
1048 | { | |
1049 | /* LDR register offset, no write-back, down, pre indexed */ | |
1050 | LHPREDOWN (); | |
1051 | /* continue with remaining instruction decode */ | |
1052 | } | |
1053 | #endif | |
1054 | if (DESTReg == 15) | |
1055 | { /* TSTP reg */ | |
c906108c | 1056 | #ifdef MODE32 |
dfcd3bfb JM |
1057 | state->Cpsr = GETSPSR (state->Bank); |
1058 | ARMul_CPSRAltered (state); | |
c906108c | 1059 | #else |
dfcd3bfb JM |
1060 | rhs = DPRegRHS; |
1061 | temp = LHS & rhs; | |
1062 | SETR15PSR (temp); | |
1063 | #endif | |
1064 | } | |
1065 | else | |
1066 | { /* TST reg */ | |
1067 | rhs = DPSRegRHS; | |
1068 | dest = LHS & rhs; | |
1069 | ARMul_NegZero (state, dest); | |
1070 | } | |
1071 | break; | |
1072 | ||
1073 | case 0x12: /* TEQ reg and MSR reg to CPSR (ARM6) */ | |
c906108c | 1074 | #ifdef MODET |
dfcd3bfb JM |
1075 | if (BITS (4, 11) == 0xB) |
1076 | { | |
1077 | /* STRH register offset, write-back, down, pre indexed */ | |
1078 | SHPREDOWNWB (); | |
1079 | break; | |
1080 | } | |
c906108c SS |
1081 | #endif |
1082 | #ifdef MODET | |
dfcd3bfb JM |
1083 | if (BITS (4, 27) == 0x12FFF1) |
1084 | { /* BX */ | |
1085 | /* Branch to the address in RHSReg. If bit0 of | |
1086 | destination address is 1 then switch to Thumb mode: */ | |
1087 | ARMword addr = state->Reg[RHSReg]; | |
1088 | ||
1089 | /* If we read the PC then the bottom bit is clear */ | |
1090 | if (RHSReg == 15) | |
1091 | addr &= ~1; | |
1092 | ||
1093 | /* Enable this for a helpful bit of debugging when | |
1094 | GDB is not yet fully working... | |
1095 | fprintf (stderr, "BX at %x to %x (go %s)\n", | |
1096 | state->Reg[15], addr, (addr & 1) ? "thumb": "arm" ); */ | |
1097 | ||
1098 | if (addr & (1 << 0)) | |
1099 | { /* Thumb bit */ | |
1100 | SETT; | |
1101 | state->Reg[15] = addr & 0xfffffffe; | |
1102 | /* NOTE: The other CPSR flag setting blocks do not | |
1103 | seem to update the state->Cpsr state, but just do | |
1104 | the explicit flag. The copy from the seperate | |
1105 | flags to the register must happen later. */ | |
1106 | FLUSHPIPE; | |
1107 | } | |
1108 | else | |
1109 | { | |
1110 | CLEART; | |
1111 | state->Reg[15] = addr & 0xfffffffc; | |
1112 | FLUSHPIPE; | |
1113 | } | |
1114 | } | |
1115 | #endif | |
1116 | if (DESTReg == 15 && BITS (17, 18) == 0) | |
1117 | { /* MSR reg to CPSR */ | |
1118 | UNDEF_MSRPC; | |
1119 | temp = DPRegRHS; | |
1120 | ARMul_FixCPSR (state, instr, temp); | |
1121 | } | |
1122 | else | |
1123 | { | |
1124 | UNDEF_Test; | |
1125 | } | |
1126 | break; | |
1127 | ||
1128 | case 0x13: /* TEQP reg */ | |
c906108c | 1129 | #ifdef MODET |
dfcd3bfb JM |
1130 | if ((BITS (4, 11) & 0xF9) == 0x9) |
1131 | { | |
1132 | /* LDR register offset, write-back, down, pre indexed */ | |
1133 | LHPREDOWNWB (); | |
1134 | /* continue with remaining instruction decode */ | |
1135 | } | |
1136 | #endif | |
1137 | if (DESTReg == 15) | |
1138 | { /* TEQP reg */ | |
c906108c | 1139 | #ifdef MODE32 |
dfcd3bfb JM |
1140 | state->Cpsr = GETSPSR (state->Bank); |
1141 | ARMul_CPSRAltered (state); | |
c906108c | 1142 | #else |
dfcd3bfb JM |
1143 | rhs = DPRegRHS; |
1144 | temp = LHS ^ rhs; | |
1145 | SETR15PSR (temp); | |
1146 | #endif | |
1147 | } | |
1148 | else | |
1149 | { /* TEQ Reg */ | |
1150 | rhs = DPSRegRHS; | |
1151 | dest = LHS ^ rhs; | |
1152 | ARMul_NegZero (state, dest); | |
1153 | } | |
1154 | break; | |
1155 | ||
1156 | case 0x14: /* CMP reg and MRS SPSR and SWP byte */ | |
c906108c | 1157 | #ifdef MODET |
dfcd3bfb JM |
1158 | if (BITS (4, 7) == 0xB) |
1159 | { | |
1160 | /* STRH immediate offset, no write-back, down, pre indexed */ | |
1161 | SHPREDOWN (); | |
1162 | break; | |
1163 | } | |
1164 | #endif | |
1165 | if (BITS (4, 11) == 9) | |
1166 | { /* SWP */ | |
1167 | UNDEF_SWPPC; | |
1168 | temp = LHS; | |
1169 | BUSUSEDINCPCS; | |
c906108c | 1170 | #ifndef MODE32 |
dfcd3bfb JM |
1171 | if (VECTORACCESS (temp) || ADDREXCEPT (temp)) |
1172 | { | |
1173 | INTERNALABORT (temp); | |
1174 | (void) ARMul_LoadByte (state, temp); | |
1175 | (void) ARMul_LoadByte (state, temp); | |
1176 | } | |
1177 | else | |
1178 | #endif | |
1179 | DEST = ARMul_SwapByte (state, temp, state->Reg[RHSReg]); | |
1180 | if (state->abortSig || state->Aborted) | |
1181 | { | |
1182 | TAKEABORT; | |
1183 | } | |
1184 | } | |
1185 | else if ((BITS (0, 11) == 0) && (LHSReg == 15)) | |
1186 | { /* MRS SPSR */ | |
1187 | UNDEF_MRSPC; | |
1188 | DEST = GETSPSR (state->Bank); | |
1189 | } | |
1190 | else | |
1191 | { | |
1192 | UNDEF_Test; | |
1193 | } | |
1194 | break; | |
1195 | ||
1196 | case 0x15: /* CMPP reg */ | |
c906108c | 1197 | #ifdef MODET |
dfcd3bfb JM |
1198 | if ((BITS (4, 7) & 0x9) == 0x9) |
1199 | { | |
1200 | /* LDR immediate offset, no write-back, down, pre indexed */ | |
1201 | LHPREDOWN (); | |
1202 | /* continue with remaining instruction decode */ | |
1203 | } | |
1204 | #endif | |
1205 | if (DESTReg == 15) | |
1206 | { /* CMPP reg */ | |
c906108c | 1207 | #ifdef MODE32 |
dfcd3bfb JM |
1208 | state->Cpsr = GETSPSR (state->Bank); |
1209 | ARMul_CPSRAltered (state); | |
c906108c | 1210 | #else |
dfcd3bfb JM |
1211 | rhs = DPRegRHS; |
1212 | temp = LHS - rhs; | |
1213 | SETR15PSR (temp); | |
1214 | #endif | |
1215 | } | |
1216 | else | |
1217 | { /* CMP reg */ | |
1218 | lhs = LHS; | |
1219 | rhs = DPRegRHS; | |
1220 | dest = lhs - rhs; | |
1221 | ARMul_NegZero (state, dest); | |
1222 | if ((lhs >= rhs) || ((rhs | lhs) >> 31)) | |
1223 | { | |
1224 | ARMul_SubCarry (state, lhs, rhs, dest); | |
1225 | ARMul_SubOverflow (state, lhs, rhs, dest); | |
1226 | } | |
1227 | else | |
1228 | { | |
1229 | CLEARC; | |
1230 | CLEARV; | |
1231 | } | |
1232 | } | |
1233 | break; | |
1234 | ||
1235 | case 0x16: /* CMN reg and MSR reg to SPSR */ | |
c906108c | 1236 | #ifdef MODET |
dfcd3bfb JM |
1237 | if (BITS (4, 7) == 0xB) |
1238 | { | |
1239 | /* STRH immediate offset, write-back, down, pre indexed */ | |
1240 | SHPREDOWNWB (); | |
1241 | break; | |
1242 | } | |
1243 | #endif | |
1244 | if (DESTReg == 15 && BITS (17, 18) == 0) | |
1245 | { /* MSR */ | |
1246 | UNDEF_MSRPC; | |
1247 | ARMul_FixSPSR (state, instr, DPRegRHS); | |
1248 | } | |
1249 | else | |
1250 | { | |
1251 | UNDEF_Test; | |
1252 | } | |
1253 | break; | |
1254 | ||
1255 | case 0x17: /* CMNP reg */ | |
c906108c | 1256 | #ifdef MODET |
dfcd3bfb JM |
1257 | if ((BITS (4, 7) & 0x9) == 0x9) |
1258 | { | |
1259 | /* LDR immediate offset, write-back, down, pre indexed */ | |
1260 | LHPREDOWNWB (); | |
1261 | /* continue with remaining instruction decoding */ | |
1262 | } | |
1263 | #endif | |
1264 | if (DESTReg == 15) | |
1265 | { | |
c906108c | 1266 | #ifdef MODE32 |
dfcd3bfb JM |
1267 | state->Cpsr = GETSPSR (state->Bank); |
1268 | ARMul_CPSRAltered (state); | |
c906108c | 1269 | #else |
dfcd3bfb JM |
1270 | rhs = DPRegRHS; |
1271 | temp = LHS + rhs; | |
1272 | SETR15PSR (temp); | |
1273 | #endif | |
1274 | break; | |
1275 | } | |
1276 | else | |
1277 | { /* CMN reg */ | |
1278 | lhs = LHS; | |
1279 | rhs = DPRegRHS; | |
1280 | dest = lhs + rhs; | |
1281 | ASSIGNZ (dest == 0); | |
1282 | if ((lhs | rhs) >> 30) | |
1283 | { /* possible C,V,N to set */ | |
1284 | ASSIGNN (NEG (dest)); | |
1285 | ARMul_AddCarry (state, lhs, rhs, dest); | |
1286 | ARMul_AddOverflow (state, lhs, rhs, dest); | |
1287 | } | |
1288 | else | |
1289 | { | |
1290 | CLEARN; | |
1291 | CLEARC; | |
1292 | CLEARV; | |
1293 | } | |
1294 | } | |
1295 | break; | |
1296 | ||
1297 | case 0x18: /* ORR reg */ | |
c906108c | 1298 | #ifdef MODET |
dfcd3bfb JM |
1299 | if (BITS (4, 11) == 0xB) |
1300 | { | |
1301 | /* STRH register offset, no write-back, up, pre indexed */ | |
1302 | SHPREUP (); | |
1303 | break; | |
1304 | } | |
1305 | #endif | |
1306 | rhs = DPRegRHS; | |
1307 | dest = LHS | rhs; | |
1308 | WRITEDEST (dest); | |
1309 | break; | |
1310 | ||
1311 | case 0x19: /* ORRS reg */ | |
c906108c | 1312 | #ifdef MODET |
dfcd3bfb JM |
1313 | if ((BITS (4, 11) & 0xF9) == 0x9) |
1314 | { | |
1315 | /* LDR register offset, no write-back, up, pre indexed */ | |
1316 | LHPREUP (); | |
1317 | /* continue with remaining instruction decoding */ | |
1318 | } | |
1319 | #endif | |
1320 | rhs = DPSRegRHS; | |
1321 | dest = LHS | rhs; | |
1322 | WRITESDEST (dest); | |
1323 | break; | |
1324 | ||
1325 | case 0x1a: /* MOV reg */ | |
c906108c | 1326 | #ifdef MODET |
dfcd3bfb JM |
1327 | if (BITS (4, 11) == 0xB) |
1328 | { | |
1329 | /* STRH register offset, write-back, up, pre indexed */ | |
1330 | SHPREUPWB (); | |
1331 | break; | |
1332 | } | |
1333 | #endif | |
1334 | dest = DPRegRHS; | |
1335 | WRITEDEST (dest); | |
1336 | break; | |
1337 | ||
1338 | case 0x1b: /* MOVS reg */ | |
c906108c | 1339 | #ifdef MODET |
dfcd3bfb JM |
1340 | if ((BITS (4, 11) & 0xF9) == 0x9) |
1341 | { | |
1342 | /* LDR register offset, write-back, up, pre indexed */ | |
1343 | LHPREUPWB (); | |
1344 | /* continue with remaining instruction decoding */ | |
1345 | } | |
1346 | #endif | |
1347 | dest = DPSRegRHS; | |
1348 | WRITESDEST (dest); | |
1349 | break; | |
1350 | ||
1351 | case 0x1c: /* BIC reg */ | |
c906108c | 1352 | #ifdef MODET |
dfcd3bfb JM |
1353 | if (BITS (4, 7) == 0xB) |
1354 | { | |
1355 | /* STRH immediate offset, no write-back, up, pre indexed */ | |
1356 | SHPREUP (); | |
1357 | break; | |
1358 | } | |
1359 | #endif | |
1360 | rhs = DPRegRHS; | |
1361 | dest = LHS & ~rhs; | |
1362 | WRITEDEST (dest); | |
1363 | break; | |
1364 | ||
1365 | case 0x1d: /* BICS reg */ | |
c906108c | 1366 | #ifdef MODET |
dfcd3bfb JM |
1367 | if ((BITS (4, 7) & 0x9) == 0x9) |
1368 | { | |
1369 | /* LDR immediate offset, no write-back, up, pre indexed */ | |
1370 | LHPREUP (); | |
1371 | /* continue with instruction decoding */ | |
1372 | } | |
1373 | #endif | |
1374 | rhs = DPSRegRHS; | |
1375 | dest = LHS & ~rhs; | |
1376 | WRITESDEST (dest); | |
1377 | break; | |
1378 | ||
1379 | case 0x1e: /* MVN reg */ | |
c906108c | 1380 | #ifdef MODET |
dfcd3bfb JM |
1381 | if (BITS (4, 7) == 0xB) |
1382 | { | |
1383 | /* STRH immediate offset, write-back, up, pre indexed */ | |
1384 | SHPREUPWB (); | |
1385 | break; | |
1386 | } | |
1387 | #endif | |
1388 | dest = ~DPRegRHS; | |
1389 | WRITEDEST (dest); | |
1390 | break; | |
1391 | ||
1392 | case 0x1f: /* MVNS reg */ | |
c906108c | 1393 | #ifdef MODET |
dfcd3bfb JM |
1394 | if ((BITS (4, 7) & 0x9) == 0x9) |
1395 | { | |
1396 | /* LDR immediate offset, write-back, up, pre indexed */ | |
1397 | LHPREUPWB (); | |
1398 | /* continue instruction decoding */ | |
1399 | } | |
c906108c | 1400 | #endif |
dfcd3bfb JM |
1401 | dest = ~DPSRegRHS; |
1402 | WRITESDEST (dest); | |
1403 | break; | |
c906108c SS |
1404 | |
1405 | /***************************************************************************\ | |
1406 | * Data Processing Immediate RHS Instructions * | |
1407 | \***************************************************************************/ | |
1408 | ||
dfcd3bfb JM |
1409 | case 0x20: /* AND immed */ |
1410 | dest = LHS & DPImmRHS; | |
1411 | WRITEDEST (dest); | |
1412 | break; | |
1413 | ||
1414 | case 0x21: /* ANDS immed */ | |
1415 | DPSImmRHS; | |
1416 | dest = LHS & rhs; | |
1417 | WRITESDEST (dest); | |
1418 | break; | |
1419 | ||
1420 | case 0x22: /* EOR immed */ | |
1421 | dest = LHS ^ DPImmRHS; | |
1422 | WRITEDEST (dest); | |
1423 | break; | |
1424 | ||
1425 | case 0x23: /* EORS immed */ | |
1426 | DPSImmRHS; | |
1427 | dest = LHS ^ rhs; | |
1428 | WRITESDEST (dest); | |
1429 | break; | |
1430 | ||
1431 | case 0x24: /* SUB immed */ | |
1432 | dest = LHS - DPImmRHS; | |
1433 | WRITEDEST (dest); | |
1434 | break; | |
1435 | ||
1436 | case 0x25: /* SUBS immed */ | |
1437 | lhs = LHS; | |
1438 | rhs = DPImmRHS; | |
1439 | dest = lhs - rhs; | |
1440 | if ((lhs >= rhs) || ((rhs | lhs) >> 31)) | |
1441 | { | |
1442 | ARMul_SubCarry (state, lhs, rhs, dest); | |
1443 | ARMul_SubOverflow (state, lhs, rhs, dest); | |
1444 | } | |
1445 | else | |
1446 | { | |
1447 | CLEARC; | |
1448 | CLEARV; | |
1449 | } | |
1450 | WRITESDEST (dest); | |
1451 | break; | |
1452 | ||
1453 | case 0x26: /* RSB immed */ | |
1454 | dest = DPImmRHS - LHS; | |
1455 | WRITEDEST (dest); | |
1456 | break; | |
1457 | ||
1458 | case 0x27: /* RSBS immed */ | |
1459 | lhs = LHS; | |
1460 | rhs = DPImmRHS; | |
1461 | dest = rhs - lhs; | |
1462 | if ((rhs >= lhs) || ((rhs | lhs) >> 31)) | |
1463 | { | |
1464 | ARMul_SubCarry (state, rhs, lhs, dest); | |
1465 | ARMul_SubOverflow (state, rhs, lhs, dest); | |
1466 | } | |
1467 | else | |
1468 | { | |
1469 | CLEARC; | |
1470 | CLEARV; | |
1471 | } | |
1472 | WRITESDEST (dest); | |
1473 | break; | |
1474 | ||
1475 | case 0x28: /* ADD immed */ | |
1476 | dest = LHS + DPImmRHS; | |
1477 | WRITEDEST (dest); | |
1478 | break; | |
1479 | ||
1480 | case 0x29: /* ADDS immed */ | |
1481 | lhs = LHS; | |
1482 | rhs = DPImmRHS; | |
1483 | dest = lhs + rhs; | |
1484 | ASSIGNZ (dest == 0); | |
1485 | if ((lhs | rhs) >> 30) | |
1486 | { /* possible C,V,N to set */ | |
1487 | ASSIGNN (NEG (dest)); | |
1488 | ARMul_AddCarry (state, lhs, rhs, dest); | |
1489 | ARMul_AddOverflow (state, lhs, rhs, dest); | |
1490 | } | |
1491 | else | |
1492 | { | |
1493 | CLEARN; | |
1494 | CLEARC; | |
1495 | CLEARV; | |
1496 | } | |
1497 | WRITESDEST (dest); | |
1498 | break; | |
1499 | ||
1500 | case 0x2a: /* ADC immed */ | |
1501 | dest = LHS + DPImmRHS + CFLAG; | |
1502 | WRITEDEST (dest); | |
1503 | break; | |
1504 | ||
1505 | case 0x2b: /* ADCS immed */ | |
1506 | lhs = LHS; | |
1507 | rhs = DPImmRHS; | |
1508 | dest = lhs + rhs + CFLAG; | |
1509 | ASSIGNZ (dest == 0); | |
1510 | if ((lhs | rhs) >> 30) | |
1511 | { /* possible C,V,N to set */ | |
1512 | ASSIGNN (NEG (dest)); | |
1513 | ARMul_AddCarry (state, lhs, rhs, dest); | |
1514 | ARMul_AddOverflow (state, lhs, rhs, dest); | |
1515 | } | |
1516 | else | |
1517 | { | |
1518 | CLEARN; | |
1519 | CLEARC; | |
1520 | CLEARV; | |
1521 | } | |
1522 | WRITESDEST (dest); | |
1523 | break; | |
1524 | ||
1525 | case 0x2c: /* SBC immed */ | |
1526 | dest = LHS - DPImmRHS - !CFLAG; | |
1527 | WRITEDEST (dest); | |
1528 | break; | |
1529 | ||
1530 | case 0x2d: /* SBCS immed */ | |
1531 | lhs = LHS; | |
1532 | rhs = DPImmRHS; | |
1533 | dest = lhs - rhs - !CFLAG; | |
1534 | if ((lhs >= rhs) || ((rhs | lhs) >> 31)) | |
1535 | { | |
1536 | ARMul_SubCarry (state, lhs, rhs, dest); | |
1537 | ARMul_SubOverflow (state, lhs, rhs, dest); | |
1538 | } | |
1539 | else | |
1540 | { | |
1541 | CLEARC; | |
1542 | CLEARV; | |
1543 | } | |
1544 | WRITESDEST (dest); | |
1545 | break; | |
1546 | ||
1547 | case 0x2e: /* RSC immed */ | |
1548 | dest = DPImmRHS - LHS - !CFLAG; | |
1549 | WRITEDEST (dest); | |
1550 | break; | |
1551 | ||
1552 | case 0x2f: /* RSCS immed */ | |
1553 | lhs = LHS; | |
1554 | rhs = DPImmRHS; | |
1555 | dest = rhs - lhs - !CFLAG; | |
1556 | if ((rhs >= lhs) || ((rhs | lhs) >> 31)) | |
1557 | { | |
1558 | ARMul_SubCarry (state, rhs, lhs, dest); | |
1559 | ARMul_SubOverflow (state, rhs, lhs, dest); | |
1560 | } | |
1561 | else | |
1562 | { | |
1563 | CLEARC; | |
1564 | CLEARV; | |
1565 | } | |
1566 | WRITESDEST (dest); | |
1567 | break; | |
1568 | ||
1569 | case 0x30: /* TST immed */ | |
1570 | UNDEF_Test; | |
1571 | break; | |
1572 | ||
1573 | case 0x31: /* TSTP immed */ | |
1574 | if (DESTReg == 15) | |
1575 | { /* TSTP immed */ | |
c906108c | 1576 | #ifdef MODE32 |
dfcd3bfb JM |
1577 | state->Cpsr = GETSPSR (state->Bank); |
1578 | ARMul_CPSRAltered (state); | |
c906108c | 1579 | #else |
dfcd3bfb JM |
1580 | temp = LHS & DPImmRHS; |
1581 | SETR15PSR (temp); | |
1582 | #endif | |
1583 | } | |
1584 | else | |
1585 | { | |
1586 | DPSImmRHS; /* TST immed */ | |
1587 | dest = LHS & rhs; | |
1588 | ARMul_NegZero (state, dest); | |
1589 | } | |
1590 | break; | |
1591 | ||
1592 | case 0x32: /* TEQ immed and MSR immed to CPSR */ | |
1593 | if (DESTReg == 15 && BITS (17, 18) == 0) | |
1594 | { /* MSR immed to CPSR */ | |
1595 | ARMul_FixCPSR (state, instr, DPImmRHS); | |
1596 | } | |
1597 | else | |
1598 | { | |
1599 | UNDEF_Test; | |
1600 | } | |
1601 | break; | |
1602 | ||
1603 | case 0x33: /* TEQP immed */ | |
1604 | if (DESTReg == 15) | |
1605 | { /* TEQP immed */ | |
c906108c | 1606 | #ifdef MODE32 |
dfcd3bfb JM |
1607 | state->Cpsr = GETSPSR (state->Bank); |
1608 | ARMul_CPSRAltered (state); | |
c906108c | 1609 | #else |
dfcd3bfb JM |
1610 | temp = LHS ^ DPImmRHS; |
1611 | SETR15PSR (temp); | |
1612 | #endif | |
1613 | } | |
1614 | else | |
1615 | { | |
1616 | DPSImmRHS; /* TEQ immed */ | |
1617 | dest = LHS ^ rhs; | |
1618 | ARMul_NegZero (state, dest); | |
1619 | } | |
1620 | break; | |
1621 | ||
1622 | case 0x34: /* CMP immed */ | |
1623 | UNDEF_Test; | |
1624 | break; | |
1625 | ||
1626 | case 0x35: /* CMPP immed */ | |
1627 | if (DESTReg == 15) | |
1628 | { /* CMPP immed */ | |
c906108c | 1629 | #ifdef MODE32 |
dfcd3bfb JM |
1630 | state->Cpsr = GETSPSR (state->Bank); |
1631 | ARMul_CPSRAltered (state); | |
c906108c | 1632 | #else |
dfcd3bfb JM |
1633 | temp = LHS - DPImmRHS; |
1634 | SETR15PSR (temp); | |
1635 | #endif | |
1636 | break; | |
1637 | } | |
1638 | else | |
1639 | { | |
1640 | lhs = LHS; /* CMP immed */ | |
1641 | rhs = DPImmRHS; | |
1642 | dest = lhs - rhs; | |
1643 | ARMul_NegZero (state, dest); | |
1644 | if ((lhs >= rhs) || ((rhs | lhs) >> 31)) | |
1645 | { | |
1646 | ARMul_SubCarry (state, lhs, rhs, dest); | |
1647 | ARMul_SubOverflow (state, lhs, rhs, dest); | |
1648 | } | |
1649 | else | |
1650 | { | |
1651 | CLEARC; | |
1652 | CLEARV; | |
1653 | } | |
1654 | } | |
1655 | break; | |
1656 | ||
1657 | case 0x36: /* CMN immed and MSR immed to SPSR */ | |
1658 | if (DESTReg == 15 && BITS (17, 18) == 0) /* MSR */ | |
1659 | ARMul_FixSPSR (state, instr, DPImmRHS); | |
1660 | else | |
1661 | { | |
1662 | UNDEF_Test; | |
1663 | } | |
1664 | break; | |
1665 | ||
1666 | case 0x37: /* CMNP immed */ | |
1667 | if (DESTReg == 15) | |
1668 | { /* CMNP immed */ | |
c906108c | 1669 | #ifdef MODE32 |
dfcd3bfb JM |
1670 | state->Cpsr = GETSPSR (state->Bank); |
1671 | ARMul_CPSRAltered (state); | |
c906108c | 1672 | #else |
dfcd3bfb JM |
1673 | temp = LHS + DPImmRHS; |
1674 | SETR15PSR (temp); | |
1675 | #endif | |
1676 | break; | |
1677 | } | |
1678 | else | |
1679 | { | |
1680 | lhs = LHS; /* CMN immed */ | |
1681 | rhs = DPImmRHS; | |
1682 | dest = lhs + rhs; | |
1683 | ASSIGNZ (dest == 0); | |
1684 | if ((lhs | rhs) >> 30) | |
1685 | { /* possible C,V,N to set */ | |
1686 | ASSIGNN (NEG (dest)); | |
1687 | ARMul_AddCarry (state, lhs, rhs, dest); | |
1688 | ARMul_AddOverflow (state, lhs, rhs, dest); | |
1689 | } | |
1690 | else | |
1691 | { | |
1692 | CLEARN; | |
1693 | CLEARC; | |
1694 | CLEARV; | |
1695 | } | |
1696 | } | |
1697 | break; | |
1698 | ||
1699 | case 0x38: /* ORR immed */ | |
1700 | dest = LHS | DPImmRHS; | |
1701 | WRITEDEST (dest); | |
1702 | break; | |
1703 | ||
1704 | case 0x39: /* ORRS immed */ | |
1705 | DPSImmRHS; | |
1706 | dest = LHS | rhs; | |
1707 | WRITESDEST (dest); | |
1708 | break; | |
1709 | ||
1710 | case 0x3a: /* MOV immed */ | |
1711 | dest = DPImmRHS; | |
1712 | WRITEDEST (dest); | |
1713 | break; | |
1714 | ||
1715 | case 0x3b: /* MOVS immed */ | |
1716 | DPSImmRHS; | |
1717 | WRITESDEST (rhs); | |
1718 | break; | |
1719 | ||
1720 | case 0x3c: /* BIC immed */ | |
1721 | dest = LHS & ~DPImmRHS; | |
1722 | WRITEDEST (dest); | |
1723 | break; | |
1724 | ||
1725 | case 0x3d: /* BICS immed */ | |
1726 | DPSImmRHS; | |
1727 | dest = LHS & ~rhs; | |
1728 | WRITESDEST (dest); | |
1729 | break; | |
1730 | ||
1731 | case 0x3e: /* MVN immed */ | |
1732 | dest = ~DPImmRHS; | |
1733 | WRITEDEST (dest); | |
1734 | break; | |
1735 | ||
1736 | case 0x3f: /* MVNS immed */ | |
1737 | DPSImmRHS; | |
1738 | WRITESDEST (~rhs); | |
1739 | break; | |
c906108c SS |
1740 | |
1741 | /***************************************************************************\ | |
1742 | * Single Data Transfer Immediate RHS Instructions * | |
1743 | \***************************************************************************/ | |
1744 | ||
dfcd3bfb JM |
1745 | case 0x40: /* Store Word, No WriteBack, Post Dec, Immed */ |
1746 | lhs = LHS; | |
1747 | if (StoreWord (state, instr, lhs)) | |
1748 | LSBase = lhs - LSImmRHS; | |
1749 | break; | |
1750 | ||
1751 | case 0x41: /* Load Word, No WriteBack, Post Dec, Immed */ | |
1752 | lhs = LHS; | |
1753 | if (LoadWord (state, instr, lhs)) | |
1754 | LSBase = lhs - LSImmRHS; | |
1755 | break; | |
1756 | ||
1757 | case 0x42: /* Store Word, WriteBack, Post Dec, Immed */ | |
1758 | UNDEF_LSRBaseEQDestWb; | |
1759 | UNDEF_LSRPCBaseWb; | |
1760 | lhs = LHS; | |
1761 | temp = lhs - LSImmRHS; | |
1762 | state->NtransSig = LOW; | |
1763 | if (StoreWord (state, instr, lhs)) | |
1764 | LSBase = temp; | |
1765 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1766 | break; | |
1767 | ||
1768 | case 0x43: /* Load Word, WriteBack, Post Dec, Immed */ | |
1769 | UNDEF_LSRBaseEQDestWb; | |
1770 | UNDEF_LSRPCBaseWb; | |
1771 | lhs = LHS; | |
1772 | state->NtransSig = LOW; | |
1773 | if (LoadWord (state, instr, lhs)) | |
1774 | LSBase = lhs - LSImmRHS; | |
1775 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1776 | break; | |
1777 | ||
1778 | case 0x44: /* Store Byte, No WriteBack, Post Dec, Immed */ | |
1779 | lhs = LHS; | |
1780 | if (StoreByte (state, instr, lhs)) | |
1781 | LSBase = lhs - LSImmRHS; | |
1782 | break; | |
1783 | ||
1784 | case 0x45: /* Load Byte, No WriteBack, Post Dec, Immed */ | |
1785 | lhs = LHS; | |
1786 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
1787 | LSBase = lhs - LSImmRHS; | |
1788 | break; | |
1789 | ||
1790 | case 0x46: /* Store Byte, WriteBack, Post Dec, Immed */ | |
1791 | UNDEF_LSRBaseEQDestWb; | |
1792 | UNDEF_LSRPCBaseWb; | |
1793 | lhs = LHS; | |
1794 | state->NtransSig = LOW; | |
1795 | if (StoreByte (state, instr, lhs)) | |
1796 | LSBase = lhs - LSImmRHS; | |
1797 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1798 | break; | |
1799 | ||
1800 | case 0x47: /* Load Byte, WriteBack, Post Dec, Immed */ | |
1801 | UNDEF_LSRBaseEQDestWb; | |
1802 | UNDEF_LSRPCBaseWb; | |
1803 | lhs = LHS; | |
1804 | state->NtransSig = LOW; | |
1805 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
1806 | LSBase = lhs - LSImmRHS; | |
1807 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1808 | break; | |
1809 | ||
1810 | case 0x48: /* Store Word, No WriteBack, Post Inc, Immed */ | |
1811 | lhs = LHS; | |
1812 | if (StoreWord (state, instr, lhs)) | |
1813 | LSBase = lhs + LSImmRHS; | |
1814 | break; | |
1815 | ||
1816 | case 0x49: /* Load Word, No WriteBack, Post Inc, Immed */ | |
1817 | lhs = LHS; | |
1818 | if (LoadWord (state, instr, lhs)) | |
1819 | LSBase = lhs + LSImmRHS; | |
1820 | break; | |
1821 | ||
1822 | case 0x4a: /* Store Word, WriteBack, Post Inc, Immed */ | |
1823 | UNDEF_LSRBaseEQDestWb; | |
1824 | UNDEF_LSRPCBaseWb; | |
1825 | lhs = LHS; | |
1826 | state->NtransSig = LOW; | |
1827 | if (StoreWord (state, instr, lhs)) | |
1828 | LSBase = lhs + LSImmRHS; | |
1829 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1830 | break; | |
1831 | ||
1832 | case 0x4b: /* Load Word, WriteBack, Post Inc, Immed */ | |
1833 | UNDEF_LSRBaseEQDestWb; | |
1834 | UNDEF_LSRPCBaseWb; | |
1835 | lhs = LHS; | |
1836 | state->NtransSig = LOW; | |
1837 | if (LoadWord (state, instr, lhs)) | |
1838 | LSBase = lhs + LSImmRHS; | |
1839 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1840 | break; | |
1841 | ||
1842 | case 0x4c: /* Store Byte, No WriteBack, Post Inc, Immed */ | |
1843 | lhs = LHS; | |
1844 | if (StoreByte (state, instr, lhs)) | |
1845 | LSBase = lhs + LSImmRHS; | |
1846 | break; | |
1847 | ||
1848 | case 0x4d: /* Load Byte, No WriteBack, Post Inc, Immed */ | |
1849 | lhs = LHS; | |
1850 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
1851 | LSBase = lhs + LSImmRHS; | |
1852 | break; | |
1853 | ||
1854 | case 0x4e: /* Store Byte, WriteBack, Post Inc, Immed */ | |
1855 | UNDEF_LSRBaseEQDestWb; | |
1856 | UNDEF_LSRPCBaseWb; | |
1857 | lhs = LHS; | |
1858 | state->NtransSig = LOW; | |
1859 | if (StoreByte (state, instr, lhs)) | |
1860 | LSBase = lhs + LSImmRHS; | |
1861 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1862 | break; | |
1863 | ||
1864 | case 0x4f: /* Load Byte, WriteBack, Post Inc, Immed */ | |
1865 | UNDEF_LSRBaseEQDestWb; | |
1866 | UNDEF_LSRPCBaseWb; | |
1867 | lhs = LHS; | |
1868 | state->NtransSig = LOW; | |
1869 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
1870 | LSBase = lhs + LSImmRHS; | |
1871 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
1872 | break; | |
1873 | ||
1874 | ||
1875 | case 0x50: /* Store Word, No WriteBack, Pre Dec, Immed */ | |
1876 | (void) StoreWord (state, instr, LHS - LSImmRHS); | |
1877 | break; | |
1878 | ||
1879 | case 0x51: /* Load Word, No WriteBack, Pre Dec, Immed */ | |
1880 | (void) LoadWord (state, instr, LHS - LSImmRHS); | |
1881 | break; | |
1882 | ||
1883 | case 0x52: /* Store Word, WriteBack, Pre Dec, Immed */ | |
1884 | UNDEF_LSRBaseEQDestWb; | |
1885 | UNDEF_LSRPCBaseWb; | |
1886 | temp = LHS - LSImmRHS; | |
1887 | if (StoreWord (state, instr, temp)) | |
1888 | LSBase = temp; | |
1889 | break; | |
1890 | ||
1891 | case 0x53: /* Load Word, WriteBack, Pre Dec, Immed */ | |
1892 | UNDEF_LSRBaseEQDestWb; | |
1893 | UNDEF_LSRPCBaseWb; | |
1894 | temp = LHS - LSImmRHS; | |
1895 | if (LoadWord (state, instr, temp)) | |
1896 | LSBase = temp; | |
1897 | break; | |
1898 | ||
1899 | case 0x54: /* Store Byte, No WriteBack, Pre Dec, Immed */ | |
1900 | (void) StoreByte (state, instr, LHS - LSImmRHS); | |
1901 | break; | |
1902 | ||
1903 | case 0x55: /* Load Byte, No WriteBack, Pre Dec, Immed */ | |
1904 | (void) LoadByte (state, instr, LHS - LSImmRHS, LUNSIGNED); | |
1905 | break; | |
1906 | ||
1907 | case 0x56: /* Store Byte, WriteBack, Pre Dec, Immed */ | |
1908 | UNDEF_LSRBaseEQDestWb; | |
1909 | UNDEF_LSRPCBaseWb; | |
1910 | temp = LHS - LSImmRHS; | |
1911 | if (StoreByte (state, instr, temp)) | |
1912 | LSBase = temp; | |
1913 | break; | |
1914 | ||
1915 | case 0x57: /* Load Byte, WriteBack, Pre Dec, Immed */ | |
1916 | UNDEF_LSRBaseEQDestWb; | |
1917 | UNDEF_LSRPCBaseWb; | |
1918 | temp = LHS - LSImmRHS; | |
1919 | if (LoadByte (state, instr, temp, LUNSIGNED)) | |
1920 | LSBase = temp; | |
1921 | break; | |
1922 | ||
1923 | case 0x58: /* Store Word, No WriteBack, Pre Inc, Immed */ | |
1924 | (void) StoreWord (state, instr, LHS + LSImmRHS); | |
1925 | break; | |
1926 | ||
1927 | case 0x59: /* Load Word, No WriteBack, Pre Inc, Immed */ | |
1928 | (void) LoadWord (state, instr, LHS + LSImmRHS); | |
1929 | break; | |
1930 | ||
1931 | case 0x5a: /* Store Word, WriteBack, Pre Inc, Immed */ | |
1932 | UNDEF_LSRBaseEQDestWb; | |
1933 | UNDEF_LSRPCBaseWb; | |
1934 | temp = LHS + LSImmRHS; | |
1935 | if (StoreWord (state, instr, temp)) | |
1936 | LSBase = temp; | |
1937 | break; | |
1938 | ||
1939 | case 0x5b: /* Load Word, WriteBack, Pre Inc, Immed */ | |
1940 | UNDEF_LSRBaseEQDestWb; | |
1941 | UNDEF_LSRPCBaseWb; | |
1942 | temp = LHS + LSImmRHS; | |
1943 | if (LoadWord (state, instr, temp)) | |
1944 | LSBase = temp; | |
1945 | break; | |
1946 | ||
1947 | case 0x5c: /* Store Byte, No WriteBack, Pre Inc, Immed */ | |
1948 | (void) StoreByte (state, instr, LHS + LSImmRHS); | |
1949 | break; | |
1950 | ||
1951 | case 0x5d: /* Load Byte, No WriteBack, Pre Inc, Immed */ | |
1952 | (void) LoadByte (state, instr, LHS + LSImmRHS, LUNSIGNED); | |
1953 | break; | |
1954 | ||
1955 | case 0x5e: /* Store Byte, WriteBack, Pre Inc, Immed */ | |
1956 | UNDEF_LSRBaseEQDestWb; | |
1957 | UNDEF_LSRPCBaseWb; | |
1958 | temp = LHS + LSImmRHS; | |
1959 | if (StoreByte (state, instr, temp)) | |
1960 | LSBase = temp; | |
1961 | break; | |
1962 | ||
1963 | case 0x5f: /* Load Byte, WriteBack, Pre Inc, Immed */ | |
1964 | UNDEF_LSRBaseEQDestWb; | |
1965 | UNDEF_LSRPCBaseWb; | |
1966 | temp = LHS + LSImmRHS; | |
1967 | if (LoadByte (state, instr, temp, LUNSIGNED)) | |
1968 | LSBase = temp; | |
1969 | break; | |
c906108c SS |
1970 | |
1971 | /***************************************************************************\ | |
1972 | * Single Data Transfer Register RHS Instructions * | |
1973 | \***************************************************************************/ | |
1974 | ||
dfcd3bfb JM |
1975 | case 0x60: /* Store Word, No WriteBack, Post Dec, Reg */ |
1976 | if (BIT (4)) | |
1977 | { | |
1978 | ARMul_UndefInstr (state, instr); | |
1979 | break; | |
1980 | } | |
1981 | UNDEF_LSRBaseEQOffWb; | |
1982 | UNDEF_LSRBaseEQDestWb; | |
1983 | UNDEF_LSRPCBaseWb; | |
1984 | UNDEF_LSRPCOffWb; | |
1985 | lhs = LHS; | |
1986 | if (StoreWord (state, instr, lhs)) | |
1987 | LSBase = lhs - LSRegRHS; | |
1988 | break; | |
1989 | ||
1990 | case 0x61: /* Load Word, No 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; | |
2001 | if (LoadWord (state, instr, lhs)) | |
2002 | LSBase = lhs - LSRegRHS; | |
2003 | break; | |
2004 | ||
2005 | case 0x62: /* Store Word, WriteBack, Post Dec, Reg */ | |
2006 | if (BIT (4)) | |
2007 | { | |
2008 | ARMul_UndefInstr (state, instr); | |
2009 | break; | |
2010 | } | |
2011 | UNDEF_LSRBaseEQOffWb; | |
2012 | UNDEF_LSRBaseEQDestWb; | |
2013 | UNDEF_LSRPCBaseWb; | |
2014 | UNDEF_LSRPCOffWb; | |
2015 | lhs = LHS; | |
2016 | state->NtransSig = LOW; | |
2017 | if (StoreWord (state, instr, lhs)) | |
2018 | LSBase = lhs - LSRegRHS; | |
2019 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
2020 | break; | |
2021 | ||
2022 | case 0x63: /* Load Word, WriteBack, Post Dec, Reg */ | |
2023 | if (BIT (4)) | |
2024 | { | |
2025 | ARMul_UndefInstr (state, instr); | |
2026 | break; | |
2027 | } | |
2028 | UNDEF_LSRBaseEQOffWb; | |
2029 | UNDEF_LSRBaseEQDestWb; | |
2030 | UNDEF_LSRPCBaseWb; | |
2031 | UNDEF_LSRPCOffWb; | |
2032 | lhs = LHS; | |
2033 | state->NtransSig = LOW; | |
2034 | if (LoadWord (state, instr, lhs)) | |
2035 | LSBase = lhs - LSRegRHS; | |
2036 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
2037 | break; | |
2038 | ||
2039 | case 0x64: /* Store Byte, No 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 | if (StoreByte (state, instr, lhs)) | |
2051 | LSBase = lhs - LSRegRHS; | |
2052 | break; | |
2053 | ||
2054 | case 0x65: /* Load Byte, No WriteBack, Post Dec, Reg */ | |
2055 | if (BIT (4)) | |
2056 | { | |
2057 | ARMul_UndefInstr (state, instr); | |
2058 | break; | |
2059 | } | |
2060 | UNDEF_LSRBaseEQOffWb; | |
2061 | UNDEF_LSRBaseEQDestWb; | |
2062 | UNDEF_LSRPCBaseWb; | |
2063 | UNDEF_LSRPCOffWb; | |
2064 | lhs = LHS; | |
2065 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
2066 | LSBase = lhs - LSRegRHS; | |
2067 | break; | |
2068 | ||
2069 | case 0x66: /* Store Byte, WriteBack, Post Dec, Reg */ | |
2070 | if (BIT (4)) | |
2071 | { | |
2072 | ARMul_UndefInstr (state, instr); | |
2073 | break; | |
2074 | } | |
2075 | UNDEF_LSRBaseEQOffWb; | |
2076 | UNDEF_LSRBaseEQDestWb; | |
2077 | UNDEF_LSRPCBaseWb; | |
2078 | UNDEF_LSRPCOffWb; | |
2079 | lhs = LHS; | |
2080 | state->NtransSig = LOW; | |
2081 | if (StoreByte (state, instr, lhs)) | |
2082 | LSBase = lhs - LSRegRHS; | |
2083 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
2084 | break; | |
2085 | ||
2086 | case 0x67: /* Load Byte, WriteBack, Post Dec, Reg */ | |
2087 | if (BIT (4)) | |
2088 | { | |
2089 | ARMul_UndefInstr (state, instr); | |
2090 | break; | |
2091 | } | |
2092 | UNDEF_LSRBaseEQOffWb; | |
2093 | UNDEF_LSRBaseEQDestWb; | |
2094 | UNDEF_LSRPCBaseWb; | |
2095 | UNDEF_LSRPCOffWb; | |
2096 | lhs = LHS; | |
2097 | state->NtransSig = LOW; | |
2098 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
2099 | LSBase = lhs - LSRegRHS; | |
2100 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
2101 | break; | |
2102 | ||
2103 | case 0x68: /* Store Word, No WriteBack, Post Inc, Reg */ | |
2104 | if (BIT (4)) | |
2105 | { | |
2106 | ARMul_UndefInstr (state, instr); | |
2107 | break; | |
2108 | } | |
2109 | UNDEF_LSRBaseEQOffWb; | |
2110 | UNDEF_LSRBaseEQDestWb; | |
2111 | UNDEF_LSRPCBaseWb; | |
2112 | UNDEF_LSRPCOffWb; | |
2113 | lhs = LHS; | |
2114 | if (StoreWord (state, instr, lhs)) | |
2115 | LSBase = lhs + LSRegRHS; | |
2116 | break; | |
2117 | ||
2118 | case 0x69: /* Load Word, No WriteBack, Post Inc, Reg */ | |
2119 | if (BIT (4)) | |
2120 | { | |
2121 | ARMul_UndefInstr (state, instr); | |
2122 | break; | |
2123 | } | |
2124 | UNDEF_LSRBaseEQOffWb; | |
2125 | UNDEF_LSRBaseEQDestWb; | |
2126 | UNDEF_LSRPCBaseWb; | |
2127 | UNDEF_LSRPCOffWb; | |
2128 | lhs = LHS; | |
2129 | if (LoadWord (state, instr, lhs)) | |
2130 | LSBase = lhs + LSRegRHS; | |
2131 | break; | |
2132 | ||
2133 | case 0x6a: /* Store Word, WriteBack, Post Inc, Reg */ | |
2134 | if (BIT (4)) | |
2135 | { | |
2136 | ARMul_UndefInstr (state, instr); | |
2137 | break; | |
2138 | } | |
2139 | UNDEF_LSRBaseEQOffWb; | |
2140 | UNDEF_LSRBaseEQDestWb; | |
2141 | UNDEF_LSRPCBaseWb; | |
2142 | UNDEF_LSRPCOffWb; | |
2143 | lhs = LHS; | |
2144 | state->NtransSig = LOW; | |
2145 | if (StoreWord (state, instr, lhs)) | |
2146 | LSBase = lhs + LSRegRHS; | |
2147 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
2148 | break; | |
2149 | ||
2150 | case 0x6b: /* Load Word, WriteBack, Post Inc, Reg */ | |
2151 | if (BIT (4)) | |
2152 | { | |
2153 | ARMul_UndefInstr (state, instr); | |
2154 | break; | |
2155 | } | |
2156 | UNDEF_LSRBaseEQOffWb; | |
2157 | UNDEF_LSRBaseEQDestWb; | |
2158 | UNDEF_LSRPCBaseWb; | |
2159 | UNDEF_LSRPCOffWb; | |
2160 | lhs = LHS; | |
2161 | state->NtransSig = LOW; | |
2162 | if (LoadWord (state, instr, lhs)) | |
2163 | LSBase = lhs + LSRegRHS; | |
2164 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
2165 | break; | |
2166 | ||
2167 | case 0x6c: /* Store Byte, No WriteBack, Post Inc, Reg */ | |
2168 | if (BIT (4)) | |
2169 | { | |
2170 | ARMul_UndefInstr (state, instr); | |
2171 | break; | |
2172 | } | |
2173 | UNDEF_LSRBaseEQOffWb; | |
2174 | UNDEF_LSRBaseEQDestWb; | |
2175 | UNDEF_LSRPCBaseWb; | |
2176 | UNDEF_LSRPCOffWb; | |
2177 | lhs = LHS; | |
2178 | if (StoreByte (state, instr, lhs)) | |
2179 | LSBase = lhs + LSRegRHS; | |
2180 | break; | |
2181 | ||
2182 | case 0x6d: /* Load Byte, No WriteBack, Post Inc, Reg */ | |
2183 | if (BIT (4)) | |
2184 | { | |
2185 | ARMul_UndefInstr (state, instr); | |
2186 | break; | |
2187 | } | |
2188 | UNDEF_LSRBaseEQOffWb; | |
2189 | UNDEF_LSRBaseEQDestWb; | |
2190 | UNDEF_LSRPCBaseWb; | |
2191 | UNDEF_LSRPCOffWb; | |
2192 | lhs = LHS; | |
2193 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
2194 | LSBase = lhs + LSRegRHS; | |
2195 | break; | |
2196 | ||
2197 | case 0x6e: /* Store Byte, WriteBack, Post Inc, Reg */ | |
2198 | if (BIT (4)) | |
2199 | { | |
2200 | ARMul_UndefInstr (state, instr); | |
2201 | break; | |
2202 | } | |
2203 | UNDEF_LSRBaseEQOffWb; | |
2204 | UNDEF_LSRBaseEQDestWb; | |
2205 | UNDEF_LSRPCBaseWb; | |
2206 | UNDEF_LSRPCOffWb; | |
2207 | lhs = LHS; | |
2208 | state->NtransSig = LOW; | |
2209 | if (StoreByte (state, instr, lhs)) | |
2210 | LSBase = lhs + LSRegRHS; | |
2211 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
2212 | break; | |
2213 | ||
2214 | case 0x6f: /* Load Byte, WriteBack, Post Inc, Reg */ | |
2215 | if (BIT (4)) | |
2216 | { | |
2217 | ARMul_UndefInstr (state, instr); | |
2218 | break; | |
2219 | } | |
2220 | UNDEF_LSRBaseEQOffWb; | |
2221 | UNDEF_LSRBaseEQDestWb; | |
2222 | UNDEF_LSRPCBaseWb; | |
2223 | UNDEF_LSRPCOffWb; | |
2224 | lhs = LHS; | |
2225 | state->NtransSig = LOW; | |
2226 | if (LoadByte (state, instr, lhs, LUNSIGNED)) | |
2227 | LSBase = lhs + LSRegRHS; | |
2228 | state->NtransSig = (state->Mode & 3) ? HIGH : LOW; | |
2229 | break; | |
2230 | ||
2231 | ||
2232 | case 0x70: /* Store Word, No WriteBack, Pre Dec, Reg */ | |
2233 | if (BIT (4)) | |
2234 | { | |
2235 | ARMul_UndefInstr (state, instr); | |
2236 | break; | |
2237 | } | |
2238 | (void) StoreWord (state, instr, LHS - LSRegRHS); | |
2239 | break; | |
2240 | ||
2241 | case 0x71: /* Load Word, No WriteBack, Pre Dec, Reg */ | |
2242 | if (BIT (4)) | |
2243 | { | |
2244 | ARMul_UndefInstr (state, instr); | |
2245 | break; | |
2246 | } | |
2247 | (void) LoadWord (state, instr, LHS - LSRegRHS); | |
2248 | break; | |
2249 | ||
2250 | case 0x72: /* Store Word, WriteBack, Pre Dec, Reg */ | |
2251 | if (BIT (4)) | |
2252 | { | |
2253 | ARMul_UndefInstr (state, instr); | |
2254 | break; | |
2255 | } | |
2256 | UNDEF_LSRBaseEQOffWb; | |
2257 | UNDEF_LSRBaseEQDestWb; | |
2258 | UNDEF_LSRPCBaseWb; | |
2259 | UNDEF_LSRPCOffWb; | |
2260 | temp = LHS - LSRegRHS; | |
2261 | if (StoreWord (state, instr, temp)) | |
2262 | LSBase = temp; | |
2263 | break; | |
2264 | ||
2265 | case 0x73: /* Load Word, WriteBack, Pre Dec, Reg */ | |
2266 | if (BIT (4)) | |
2267 | { | |
2268 | ARMul_UndefInstr (state, instr); | |
2269 | break; | |
2270 | } | |
2271 | UNDEF_LSRBaseEQOffWb; | |
2272 | UNDEF_LSRBaseEQDestWb; | |
2273 | UNDEF_LSRPCBaseWb; | |
2274 | UNDEF_LSRPCOffWb; | |
2275 | temp = LHS - LSRegRHS; | |
2276 | if (LoadWord (state, instr, temp)) | |
2277 | LSBase = temp; | |
2278 | break; | |
2279 | ||
2280 | case 0x74: /* Store Byte, No WriteBack, Pre Dec, Reg */ | |
2281 | if (BIT (4)) | |
2282 | { | |
2283 | ARMul_UndefInstr (state, instr); | |
2284 | break; | |
2285 | } | |
2286 | (void) StoreByte (state, instr, LHS - LSRegRHS); | |
2287 | break; | |
2288 | ||
2289 | case 0x75: /* Load Byte, No WriteBack, Pre Dec, Reg */ | |
2290 | if (BIT (4)) | |
2291 | { | |
2292 | ARMul_UndefInstr (state, instr); | |
2293 | break; | |
2294 | } | |
2295 | (void) LoadByte (state, instr, LHS - LSRegRHS, LUNSIGNED); | |
2296 | break; | |
2297 | ||
2298 | case 0x76: /* Store Byte, WriteBack, Pre Dec, Reg */ | |
2299 | if (BIT (4)) | |
2300 | { | |
2301 | ARMul_UndefInstr (state, instr); | |
2302 | break; | |
2303 | } | |
2304 | UNDEF_LSRBaseEQOffWb; | |
2305 | UNDEF_LSRBaseEQDestWb; | |
2306 | UNDEF_LSRPCBaseWb; | |
2307 | UNDEF_LSRPCOffWb; | |
2308 | temp = LHS - LSRegRHS; | |
2309 | if (StoreByte (state, instr, temp)) | |
2310 | LSBase = temp; | |
2311 | break; | |
2312 | ||
2313 | case 0x77: /* Load Byte, WriteBack, Pre Dec, Reg */ | |
2314 | if (BIT (4)) | |
2315 | { | |
2316 | ARMul_UndefInstr (state, instr); | |
2317 | break; | |
2318 | } | |
2319 | UNDEF_LSRBaseEQOffWb; | |
2320 | UNDEF_LSRBaseEQDestWb; | |
2321 | UNDEF_LSRPCBaseWb; | |
2322 | UNDEF_LSRPCOffWb; | |
2323 | temp = LHS - LSRegRHS; | |
2324 | if (LoadByte (state, instr, temp, LUNSIGNED)) | |
2325 | LSBase = temp; | |
2326 | break; | |
2327 | ||
2328 | case 0x78: /* Store Word, No WriteBack, Pre Inc, Reg */ | |
2329 | if (BIT (4)) | |
2330 | { | |
2331 | ARMul_UndefInstr (state, instr); | |
2332 | break; | |
2333 | } | |
2334 | (void) StoreWord (state, instr, LHS + LSRegRHS); | |
2335 | break; | |
2336 | ||
2337 | case 0x79: /* Load Word, No WriteBack, Pre Inc, Reg */ | |
2338 | if (BIT (4)) | |
2339 | { | |
2340 | ARMul_UndefInstr (state, instr); | |
2341 | break; | |
2342 | } | |
2343 | (void) LoadWord (state, instr, LHS + LSRegRHS); | |
2344 | break; | |
2345 | ||
2346 | case 0x7a: /* Store Word, WriteBack, Pre Inc, Reg */ | |
2347 | if (BIT (4)) | |
2348 | { | |
2349 | ARMul_UndefInstr (state, instr); | |
2350 | break; | |
2351 | } | |
2352 | UNDEF_LSRBaseEQOffWb; | |
2353 | UNDEF_LSRBaseEQDestWb; | |
2354 | UNDEF_LSRPCBaseWb; | |
2355 | UNDEF_LSRPCOffWb; | |
2356 | temp = LHS + LSRegRHS; | |
2357 | if (StoreWord (state, instr, temp)) | |
2358 | LSBase = temp; | |
2359 | break; | |
2360 | ||
2361 | case 0x7b: /* Load Word, WriteBack, Pre Inc, Reg */ | |
2362 | if (BIT (4)) | |
2363 | { | |
2364 | ARMul_UndefInstr (state, instr); | |
2365 | break; | |
2366 | } | |
2367 | UNDEF_LSRBaseEQOffWb; | |
2368 | UNDEF_LSRBaseEQDestWb; | |
2369 | UNDEF_LSRPCBaseWb; | |
2370 | UNDEF_LSRPCOffWb; | |
2371 | temp = LHS + LSRegRHS; | |
2372 | if (LoadWord (state, instr, temp)) | |
2373 | LSBase = temp; | |
2374 | break; | |
2375 | ||
2376 | case 0x7c: /* Store Byte, No WriteBack, Pre Inc, Reg */ | |
2377 | if (BIT (4)) | |
2378 | { | |
2379 | ARMul_UndefInstr (state, instr); | |
2380 | break; | |
2381 | } | |
2382 | (void) StoreByte (state, instr, LHS + LSRegRHS); | |
2383 | break; | |
2384 | ||
2385 | case 0x7d: /* Load Byte, No WriteBack, Pre Inc, Reg */ | |
2386 | if (BIT (4)) | |
2387 | { | |
2388 | ARMul_UndefInstr (state, instr); | |
2389 | break; | |
2390 | } | |
2391 | (void) LoadByte (state, instr, LHS + LSRegRHS, LUNSIGNED); | |
2392 | break; | |
2393 | ||
2394 | case 0x7e: /* Store Byte, WriteBack, Pre Inc, Reg */ | |
2395 | if (BIT (4)) | |
2396 | { | |
2397 | ARMul_UndefInstr (state, instr); | |
2398 | break; | |
2399 | } | |
2400 | UNDEF_LSRBaseEQOffWb; | |
2401 | UNDEF_LSRBaseEQDestWb; | |
2402 | UNDEF_LSRPCBaseWb; | |
2403 | UNDEF_LSRPCOffWb; | |
2404 | temp = LHS + LSRegRHS; | |
2405 | if (StoreByte (state, instr, temp)) | |
2406 | LSBase = temp; | |
2407 | break; | |
2408 | ||
2409 | case 0x7f: /* Load Byte, WriteBack, Pre Inc, Reg */ | |
2410 | if (BIT (4)) | |
2411 | { | |
2412 | /* Check for the special breakpoint opcode. | |
2413 | This value should correspond to the value defined | |
2414 | as ARM_BE_BREAKPOINT in gdb/arm-tdep.c. */ | |
2415 | if (BITS (0, 19) == 0xfdefe) | |
2416 | { | |
2417 | if (!ARMul_OSHandleSWI (state, SWI_Breakpoint)) | |
2418 | ARMul_Abort (state, ARMul_SWIV); | |
2419 | } | |
2420 | else | |
2421 | ARMul_UndefInstr (state, instr); | |
2422 | break; | |
2423 | } | |
2424 | UNDEF_LSRBaseEQOffWb; | |
2425 | UNDEF_LSRBaseEQDestWb; | |
2426 | UNDEF_LSRPCBaseWb; | |
2427 | UNDEF_LSRPCOffWb; | |
2428 | temp = LHS + LSRegRHS; | |
2429 | if (LoadByte (state, instr, temp, LUNSIGNED)) | |
2430 | LSBase = temp; | |
2431 | break; | |
c906108c SS |
2432 | |
2433 | /***************************************************************************\ | |
2434 | * Multiple Data Transfer Instructions * | |
2435 | \***************************************************************************/ | |
2436 | ||
dfcd3bfb JM |
2437 | case 0x80: /* Store, No WriteBack, Post Dec */ |
2438 | STOREMULT (instr, LSBase - LSMNumRegs + 4L, 0L); | |
2439 | break; | |
2440 | ||
2441 | case 0x81: /* Load, No WriteBack, Post Dec */ | |
2442 | LOADMULT (instr, LSBase - LSMNumRegs + 4L, 0L); | |
2443 | break; | |
2444 | ||
2445 | case 0x82: /* Store, WriteBack, Post Dec */ | |
2446 | temp = LSBase - LSMNumRegs; | |
2447 | STOREMULT (instr, temp + 4L, temp); | |
2448 | break; | |
c906108c | 2449 | |
dfcd3bfb JM |
2450 | case 0x83: /* Load, WriteBack, Post Dec */ |
2451 | temp = LSBase - LSMNumRegs; | |
2452 | LOADMULT (instr, temp + 4L, temp); | |
2453 | break; | |
c906108c | 2454 | |
dfcd3bfb JM |
2455 | case 0x84: /* Store, Flags, No WriteBack, Post Dec */ |
2456 | STORESMULT (instr, LSBase - LSMNumRegs + 4L, 0L); | |
2457 | break; | |
c906108c | 2458 | |
dfcd3bfb JM |
2459 | case 0x85: /* Load, Flags, No WriteBack, Post Dec */ |
2460 | LOADSMULT (instr, LSBase - LSMNumRegs + 4L, 0L); | |
2461 | break; | |
2462 | ||
2463 | case 0x86: /* Store, Flags, WriteBack, Post Dec */ | |
2464 | temp = LSBase - LSMNumRegs; | |
2465 | STORESMULT (instr, temp + 4L, temp); | |
2466 | break; | |
2467 | ||
2468 | case 0x87: /* Load, Flags, WriteBack, Post Dec */ | |
2469 | temp = LSBase - LSMNumRegs; | |
2470 | LOADSMULT (instr, temp + 4L, temp); | |
2471 | break; | |
c906108c SS |
2472 | |
2473 | ||
dfcd3bfb JM |
2474 | case 0x88: /* Store, No WriteBack, Post Inc */ |
2475 | STOREMULT (instr, LSBase, 0L); | |
2476 | break; | |
2477 | ||
2478 | case 0x89: /* Load, No WriteBack, Post Inc */ | |
2479 | LOADMULT (instr, LSBase, 0L); | |
2480 | break; | |
2481 | ||
2482 | case 0x8a: /* Store, WriteBack, Post Inc */ | |
2483 | temp = LSBase; | |
2484 | STOREMULT (instr, temp, temp + LSMNumRegs); | |
2485 | break; | |
2486 | ||
2487 | case 0x8b: /* Load, WriteBack, Post Inc */ | |
2488 | temp = LSBase; | |
2489 | LOADMULT (instr, temp, temp + LSMNumRegs); | |
2490 | break; | |
2491 | ||
2492 | case 0x8c: /* Store, Flags, No WriteBack, Post Inc */ | |
2493 | STORESMULT (instr, LSBase, 0L); | |
2494 | break; | |
2495 | ||
2496 | case 0x8d: /* Load, Flags, No WriteBack, Post Inc */ | |
2497 | LOADSMULT (instr, LSBase, 0L); | |
2498 | break; | |
2499 | ||
2500 | case 0x8e: /* Store, Flags, WriteBack, Post Inc */ | |
2501 | temp = LSBase; | |
2502 | STORESMULT (instr, temp, temp + LSMNumRegs); | |
2503 | break; | |
2504 | ||
2505 | case 0x8f: /* Load, Flags, WriteBack, Post Inc */ | |
2506 | temp = LSBase; | |
2507 | LOADSMULT (instr, temp, temp + LSMNumRegs); | |
2508 | break; | |
2509 | ||
2510 | ||
2511 | case 0x90: /* Store, No WriteBack, Pre Dec */ | |
2512 | STOREMULT (instr, LSBase - LSMNumRegs, 0L); | |
2513 | break; | |
2514 | ||
2515 | case 0x91: /* Load, No WriteBack, Pre Dec */ | |
2516 | LOADMULT (instr, LSBase - LSMNumRegs, 0L); | |
2517 | break; | |
2518 | ||
2519 | case 0x92: /* Store, WriteBack, Pre Dec */ | |
2520 | temp = LSBase - LSMNumRegs; | |
2521 | STOREMULT (instr, temp, temp); | |
2522 | break; | |
2523 | ||
2524 | case 0x93: /* Load, WriteBack, Pre Dec */ | |
2525 | temp = LSBase - LSMNumRegs; | |
2526 | LOADMULT (instr, temp, temp); | |
2527 | break; | |
2528 | ||
2529 | case 0x94: /* Store, Flags, No WriteBack, Pre Dec */ | |
2530 | STORESMULT (instr, LSBase - LSMNumRegs, 0L); | |
2531 | break; | |
2532 | ||
2533 | case 0x95: /* Load, Flags, No WriteBack, Pre Dec */ | |
2534 | LOADSMULT (instr, LSBase - LSMNumRegs, 0L); | |
2535 | break; | |
2536 | ||
2537 | case 0x96: /* Store, Flags, WriteBack, Pre Dec */ | |
2538 | temp = LSBase - LSMNumRegs; | |
2539 | STORESMULT (instr, temp, temp); | |
2540 | break; | |
2541 | ||
2542 | case 0x97: /* Load, Flags, WriteBack, Pre Dec */ | |
2543 | temp = LSBase - LSMNumRegs; | |
2544 | LOADSMULT (instr, temp, temp); | |
2545 | break; | |
2546 | ||
2547 | ||
2548 | case 0x98: /* Store, No WriteBack, Pre Inc */ | |
2549 | STOREMULT (instr, LSBase + 4L, 0L); | |
2550 | break; | |
2551 | ||
2552 | case 0x99: /* Load, No WriteBack, Pre Inc */ | |
2553 | LOADMULT (instr, LSBase + 4L, 0L); | |
2554 | break; | |
2555 | ||
2556 | case 0x9a: /* Store, WriteBack, Pre Inc */ | |
2557 | temp = LSBase; | |
2558 | STOREMULT (instr, temp + 4L, temp + LSMNumRegs); | |
2559 | break; | |
2560 | ||
2561 | case 0x9b: /* Load, WriteBack, Pre Inc */ | |
2562 | temp = LSBase; | |
2563 | LOADMULT (instr, temp + 4L, temp + LSMNumRegs); | |
2564 | break; | |
c906108c | 2565 | |
dfcd3bfb JM |
2566 | case 0x9c: /* Store, Flags, No WriteBack, Pre Inc */ |
2567 | STORESMULT (instr, LSBase + 4L, 0L); | |
2568 | break; | |
c906108c | 2569 | |
dfcd3bfb JM |
2570 | case 0x9d: /* Load, Flags, No WriteBack, Pre Inc */ |
2571 | LOADSMULT (instr, LSBase + 4L, 0L); | |
2572 | break; | |
c906108c | 2573 | |
dfcd3bfb JM |
2574 | case 0x9e: /* Store, Flags, WriteBack, Pre Inc */ |
2575 | temp = LSBase; | |
2576 | STORESMULT (instr, temp + 4L, temp + LSMNumRegs); | |
2577 | break; | |
2578 | ||
2579 | case 0x9f: /* Load, Flags, WriteBack, Pre Inc */ | |
2580 | temp = LSBase; | |
2581 | LOADSMULT (instr, temp + 4L, temp + LSMNumRegs); | |
2582 | break; | |
c906108c SS |
2583 | |
2584 | /***************************************************************************\ | |
2585 | * Branch forward * | |
2586 | \***************************************************************************/ | |
2587 | ||
dfcd3bfb JM |
2588 | case 0xa0: |
2589 | case 0xa1: | |
2590 | case 0xa2: | |
2591 | case 0xa3: | |
2592 | case 0xa4: | |
2593 | case 0xa5: | |
2594 | case 0xa6: | |
2595 | case 0xa7: | |
2596 | state->Reg[15] = pc + 8 + POSBRANCH; | |
2597 | FLUSHPIPE; | |
2598 | break; | |
c906108c SS |
2599 | |
2600 | /***************************************************************************\ | |
2601 | * Branch backward * | |
2602 | \***************************************************************************/ | |
2603 | ||
dfcd3bfb JM |
2604 | case 0xa8: |
2605 | case 0xa9: | |
2606 | case 0xaa: | |
2607 | case 0xab: | |
2608 | case 0xac: | |
2609 | case 0xad: | |
2610 | case 0xae: | |
2611 | case 0xaf: | |
2612 | state->Reg[15] = pc + 8 + NEGBRANCH; | |
2613 | FLUSHPIPE; | |
2614 | break; | |
c906108c SS |
2615 | |
2616 | /***************************************************************************\ | |
2617 | * Branch and Link forward * | |
2618 | \***************************************************************************/ | |
2619 | ||
dfcd3bfb JM |
2620 | case 0xb0: |
2621 | case 0xb1: | |
2622 | case 0xb2: | |
2623 | case 0xb3: | |
2624 | case 0xb4: | |
2625 | case 0xb5: | |
2626 | case 0xb6: | |
2627 | case 0xb7: | |
c906108c | 2628 | #ifdef MODE32 |
dfcd3bfb | 2629 | state->Reg[14] = pc + 4; /* put PC into Link */ |
c906108c | 2630 | #else |
dfcd3bfb | 2631 | state->Reg[14] = pc + 4 | ECC | ER15INT | EMODE; /* put PC into Link */ |
c906108c | 2632 | #endif |
dfcd3bfb JM |
2633 | state->Reg[15] = pc + 8 + POSBRANCH; |
2634 | FLUSHPIPE; | |
2635 | break; | |
c906108c SS |
2636 | |
2637 | /***************************************************************************\ | |
2638 | * Branch and Link backward * | |
2639 | \***************************************************************************/ | |
2640 | ||
dfcd3bfb JM |
2641 | case 0xb8: |
2642 | case 0xb9: | |
2643 | case 0xba: | |
2644 | case 0xbb: | |
2645 | case 0xbc: | |
2646 | case 0xbd: | |
2647 | case 0xbe: | |
2648 | case 0xbf: | |
c906108c | 2649 | #ifdef MODE32 |
dfcd3bfb | 2650 | state->Reg[14] = pc + 4; /* put PC into Link */ |
c906108c | 2651 | #else |
dfcd3bfb | 2652 | state->Reg[14] = (pc + 4) | ECC | ER15INT | EMODE; /* put PC into Link */ |
c906108c | 2653 | #endif |
dfcd3bfb JM |
2654 | state->Reg[15] = pc + 8 + NEGBRANCH; |
2655 | FLUSHPIPE; | |
2656 | break; | |
c906108c SS |
2657 | |
2658 | /***************************************************************************\ | |
2659 | * Co-Processor Data Transfers * | |
2660 | \***************************************************************************/ | |
2661 | ||
dfcd3bfb JM |
2662 | case 0xc4: |
2663 | case 0xc0: /* Store , No WriteBack , Post Dec */ | |
2664 | ARMul_STC (state, instr, LHS); | |
2665 | break; | |
2666 | ||
2667 | case 0xc5: | |
2668 | case 0xc1: /* Load , No WriteBack , Post Dec */ | |
2669 | ARMul_LDC (state, instr, LHS); | |
2670 | break; | |
2671 | ||
2672 | case 0xc2: | |
2673 | case 0xc6: /* Store , WriteBack , Post Dec */ | |
2674 | lhs = LHS; | |
2675 | state->Base = lhs - LSCOff; | |
2676 | ARMul_STC (state, instr, lhs); | |
2677 | break; | |
2678 | ||
2679 | case 0xc3: | |
2680 | case 0xc7: /* Load , WriteBack , Post Dec */ | |
2681 | lhs = LHS; | |
2682 | state->Base = lhs - LSCOff; | |
2683 | ARMul_LDC (state, instr, lhs); | |
2684 | break; | |
2685 | ||
2686 | case 0xc8: | |
2687 | case 0xcc: /* Store , No WriteBack , Post Inc */ | |
2688 | ARMul_STC (state, instr, LHS); | |
2689 | break; | |
2690 | ||
2691 | case 0xc9: | |
2692 | case 0xcd: /* Load , No WriteBack , Post Inc */ | |
2693 | ARMul_LDC (state, instr, LHS); | |
2694 | break; | |
2695 | ||
2696 | case 0xca: | |
2697 | case 0xce: /* Store , WriteBack , Post Inc */ | |
2698 | lhs = LHS; | |
2699 | state->Base = lhs + LSCOff; | |
2700 | ARMul_STC (state, instr, LHS); | |
2701 | break; | |
2702 | ||
2703 | case 0xcb: | |
2704 | case 0xcf: /* Load , WriteBack , Post Inc */ | |
2705 | lhs = LHS; | |
2706 | state->Base = lhs + LSCOff; | |
2707 | ARMul_LDC (state, instr, LHS); | |
2708 | break; | |
2709 | ||
2710 | ||
2711 | case 0xd0: | |
2712 | case 0xd4: /* Store , No WriteBack , Pre Dec */ | |
2713 | ARMul_STC (state, instr, LHS - LSCOff); | |
2714 | break; | |
2715 | ||
2716 | case 0xd1: | |
2717 | case 0xd5: /* Load , No WriteBack , Pre Dec */ | |
2718 | ARMul_LDC (state, instr, LHS - LSCOff); | |
2719 | break; | |
2720 | ||
2721 | case 0xd2: | |
2722 | case 0xd6: /* Store , WriteBack , Pre Dec */ | |
2723 | lhs = LHS - LSCOff; | |
2724 | state->Base = lhs; | |
2725 | ARMul_STC (state, instr, lhs); | |
2726 | break; | |
2727 | ||
2728 | case 0xd3: | |
2729 | case 0xd7: /* Load , WriteBack , Pre Dec */ | |
2730 | lhs = LHS - LSCOff; | |
2731 | state->Base = lhs; | |
2732 | ARMul_LDC (state, instr, lhs); | |
2733 | break; | |
2734 | ||
2735 | case 0xd8: | |
2736 | case 0xdc: /* Store , No WriteBack , Pre Inc */ | |
2737 | ARMul_STC (state, instr, LHS + LSCOff); | |
2738 | break; | |
2739 | ||
2740 | case 0xd9: | |
2741 | case 0xdd: /* Load , No WriteBack , Pre Inc */ | |
2742 | ARMul_LDC (state, instr, LHS + LSCOff); | |
2743 | break; | |
2744 | ||
2745 | case 0xda: | |
2746 | case 0xde: /* Store , WriteBack , Pre Inc */ | |
2747 | lhs = LHS + LSCOff; | |
2748 | state->Base = lhs; | |
2749 | ARMul_STC (state, instr, lhs); | |
2750 | break; | |
2751 | ||
2752 | case 0xdb: | |
2753 | case 0xdf: /* Load , WriteBack , Pre Inc */ | |
2754 | lhs = LHS + LSCOff; | |
2755 | state->Base = lhs; | |
2756 | ARMul_LDC (state, instr, lhs); | |
2757 | break; | |
c906108c SS |
2758 | |
2759 | /***************************************************************************\ | |
2760 | * Co-Processor Register Transfers (MCR) and Data Ops * | |
2761 | \***************************************************************************/ | |
2762 | ||
dfcd3bfb JM |
2763 | case 0xe2: |
2764 | case 0xe0: | |
2765 | case 0xe4: | |
2766 | case 0xe6: | |
2767 | case 0xe8: | |
2768 | case 0xea: | |
2769 | case 0xec: | |
2770 | case 0xee: | |
2771 | if (BIT (4)) | |
2772 | { /* MCR */ | |
2773 | if (DESTReg == 15) | |
2774 | { | |
2775 | UNDEF_MCRPC; | |
c906108c | 2776 | #ifdef MODE32 |
dfcd3bfb | 2777 | ARMul_MCR (state, instr, state->Reg[15] + isize); |
c906108c | 2778 | #else |
dfcd3bfb JM |
2779 | ARMul_MCR (state, instr, ECC | ER15INT | EMODE | |
2780 | ((state->Reg[15] + isize) & R15PCBITS)); | |
c906108c | 2781 | #endif |
dfcd3bfb JM |
2782 | } |
2783 | else | |
2784 | ARMul_MCR (state, instr, DEST); | |
2785 | } | |
2786 | else /* CDP Part 1 */ | |
2787 | ARMul_CDP (state, instr); | |
2788 | break; | |
c906108c SS |
2789 | |
2790 | /***************************************************************************\ | |
2791 | * Co-Processor Register Transfers (MRC) and Data Ops * | |
2792 | \***************************************************************************/ | |
2793 | ||
dfcd3bfb JM |
2794 | case 0xe1: |
2795 | case 0xe3: | |
2796 | case 0xe5: | |
2797 | case 0xe7: | |
2798 | case 0xe9: | |
2799 | case 0xeb: | |
2800 | case 0xed: | |
2801 | case 0xef: | |
2802 | if (BIT (4)) | |
2803 | { /* MRC */ | |
2804 | temp = ARMul_MRC (state, instr); | |
2805 | if (DESTReg == 15) | |
2806 | { | |
2807 | ASSIGNN ((temp & NBIT) != 0); | |
2808 | ASSIGNZ ((temp & ZBIT) != 0); | |
2809 | ASSIGNC ((temp & CBIT) != 0); | |
2810 | ASSIGNV ((temp & VBIT) != 0); | |
2811 | } | |
2812 | else | |
2813 | DEST = temp; | |
2814 | } | |
2815 | else /* CDP Part 2 */ | |
2816 | ARMul_CDP (state, instr); | |
2817 | break; | |
c906108c SS |
2818 | |
2819 | /***************************************************************************\ | |
2820 | * SWI instruction * | |
2821 | \***************************************************************************/ | |
2822 | ||
dfcd3bfb JM |
2823 | case 0xf0: |
2824 | case 0xf1: | |
2825 | case 0xf2: | |
2826 | case 0xf3: | |
2827 | case 0xf4: | |
2828 | case 0xf5: | |
2829 | case 0xf6: | |
2830 | case 0xf7: | |
2831 | case 0xf8: | |
2832 | case 0xf9: | |
2833 | case 0xfa: | |
2834 | case 0xfb: | |
2835 | case 0xfc: | |
2836 | case 0xfd: | |
2837 | case 0xfe: | |
2838 | case 0xff: | |
2839 | if (instr == ARMul_ABORTWORD && state->AbortAddr == pc) | |
2840 | { /* a prefetch abort */ | |
2841 | ARMul_Abort (state, ARMul_PrefetchAbortV); | |
2842 | break; | |
2843 | } | |
2844 | ||
2845 | if (!ARMul_OSHandleSWI (state, BITS (0, 23))) | |
2846 | { | |
2847 | ARMul_Abort (state, ARMul_SWIV); | |
2848 | } | |
2849 | break; | |
2850 | } /* 256 way main switch */ | |
2851 | } /* if temp */ | |
c906108c SS |
2852 | |
2853 | #ifdef MODET | |
dfcd3bfb | 2854 | donext: |
c906108c SS |
2855 | #endif |
2856 | ||
7a292a7a | 2857 | #ifdef NEED_UI_LOOP_HOOK |
dfcd3bfb JM |
2858 | if (ui_loop_hook != NULL && ui_loop_hook_counter-- < 0) |
2859 | { | |
2860 | ui_loop_hook_counter = UI_LOOP_POLL_INTERVAL; | |
2861 | ui_loop_hook (0); | |
2862 | } | |
7a292a7a SS |
2863 | #endif /* NEED_UI_LOOP_HOOK */ |
2864 | ||
dfcd3bfb JM |
2865 | if (state->Emulate == ONCE) |
2866 | state->Emulate = STOP; | |
2867 | else if (state->Emulate != RUN) | |
2868 | break; | |
2869 | } | |
2870 | while (!stop_simulator); /* do loop */ | |
c906108c | 2871 | |
dfcd3bfb JM |
2872 | state->decoded = decoded; |
2873 | state->loaded = loaded; | |
2874 | state->pc = pc; | |
2875 | return (pc); | |
2876 | } /* Emulate 26/32 in instruction based mode */ | |
c906108c SS |
2877 | |
2878 | ||
2879 | /***************************************************************************\ | |
2880 | * This routine evaluates most Data Processing register RHS's with the S * | |
2881 | * bit clear. It is intended to be called from the macro DPRegRHS, which * | |
2882 | * filters the common case of an unshifted register with in line code * | |
2883 | \***************************************************************************/ | |
2884 | ||
dfcd3bfb JM |
2885 | static ARMword |
2886 | GetDPRegRHS (ARMul_State * state, ARMword instr) | |
2887 | { | |
2888 | ARMword shamt, base; | |
c906108c | 2889 | |
dfcd3bfb JM |
2890 | base = RHSReg; |
2891 | if (BIT (4)) | |
2892 | { /* shift amount in a register */ | |
2893 | UNDEF_Shift; | |
2894 | INCPC; | |
c906108c | 2895 | #ifndef MODE32 |
dfcd3bfb JM |
2896 | if (base == 15) |
2897 | base = ECC | ER15INT | R15PC | EMODE; | |
2898 | else | |
2899 | #endif | |
2900 | base = state->Reg[base]; | |
2901 | ARMul_Icycles (state, 1, 0L); | |
2902 | shamt = state->Reg[BITS (8, 11)] & 0xff; | |
2903 | switch ((int) BITS (5, 6)) | |
2904 | { | |
2905 | case LSL: | |
2906 | if (shamt == 0) | |
2907 | return (base); | |
2908 | else if (shamt >= 32) | |
2909 | return (0); | |
2910 | else | |
2911 | return (base << shamt); | |
2912 | case LSR: | |
2913 | if (shamt == 0) | |
2914 | return (base); | |
2915 | else if (shamt >= 32) | |
2916 | return (0); | |
2917 | else | |
2918 | return (base >> shamt); | |
2919 | case ASR: | |
2920 | if (shamt == 0) | |
2921 | return (base); | |
2922 | else if (shamt >= 32) | |
2923 | return ((ARMword) ((long int) base >> 31L)); | |
2924 | else | |
2925 | return ((ARMword) ((long int) base >> (int) shamt)); | |
2926 | case ROR: | |
2927 | shamt &= 0x1f; | |
2928 | if (shamt == 0) | |
2929 | return (base); | |
2930 | else | |
2931 | return ((base << (32 - shamt)) | (base >> shamt)); | |
2932 | } | |
c906108c | 2933 | } |
dfcd3bfb JM |
2934 | else |
2935 | { /* shift amount is a constant */ | |
c906108c | 2936 | #ifndef MODE32 |
dfcd3bfb JM |
2937 | if (base == 15) |
2938 | base = ECC | ER15INT | R15PC | EMODE; | |
2939 | else | |
2940 | #endif | |
2941 | base = state->Reg[base]; | |
2942 | shamt = BITS (7, 11); | |
2943 | switch ((int) BITS (5, 6)) | |
2944 | { | |
2945 | case LSL: | |
2946 | return (base << shamt); | |
2947 | case LSR: | |
2948 | if (shamt == 0) | |
2949 | return (0); | |
2950 | else | |
2951 | return (base >> shamt); | |
2952 | case ASR: | |
2953 | if (shamt == 0) | |
2954 | return ((ARMword) ((long int) base >> 31L)); | |
2955 | else | |
2956 | return ((ARMword) ((long int) base >> (int) shamt)); | |
2957 | case ROR: | |
2958 | if (shamt == 0) /* its an RRX */ | |
2959 | return ((base >> 1) | (CFLAG << 31)); | |
2960 | else | |
2961 | return ((base << (32 - shamt)) | (base >> shamt)); | |
2962 | } | |
c906108c | 2963 | } |
dfcd3bfb JM |
2964 | return (0); /* just to shut up lint */ |
2965 | } | |
2966 | ||
c906108c SS |
2967 | /***************************************************************************\ |
2968 | * This routine evaluates most Logical Data Processing register RHS's * | |
2969 | * with the S bit set. It is intended to be called from the macro * | |
2970 | * DPSRegRHS, which filters the common case of an unshifted register * | |
2971 | * with in line code * | |
2972 | \***************************************************************************/ | |
2973 | ||
dfcd3bfb JM |
2974 | static ARMword |
2975 | GetDPSRegRHS (ARMul_State * state, ARMword instr) | |
2976 | { | |
2977 | ARMword shamt, base; | |
c906108c | 2978 | |
dfcd3bfb JM |
2979 | base = RHSReg; |
2980 | if (BIT (4)) | |
2981 | { /* shift amount in a register */ | |
2982 | UNDEF_Shift; | |
2983 | INCPC; | |
c906108c | 2984 | #ifndef MODE32 |
dfcd3bfb JM |
2985 | if (base == 15) |
2986 | base = ECC | ER15INT | R15PC | EMODE; | |
2987 | else | |
2988 | #endif | |
2989 | base = state->Reg[base]; | |
2990 | ARMul_Icycles (state, 1, 0L); | |
2991 | shamt = state->Reg[BITS (8, 11)] & 0xff; | |
2992 | switch ((int) BITS (5, 6)) | |
2993 | { | |
2994 | case LSL: | |
2995 | if (shamt == 0) | |
2996 | return (base); | |
2997 | else if (shamt == 32) | |
2998 | { | |
2999 | ASSIGNC (base & 1); | |
3000 | return (0); | |
3001 | } | |
3002 | else if (shamt > 32) | |
3003 | { | |
3004 | CLEARC; | |
3005 | return (0); | |
3006 | } | |
3007 | else | |
3008 | { | |
3009 | ASSIGNC ((base >> (32 - shamt)) & 1); | |
3010 | return (base << shamt); | |
3011 | } | |
3012 | case LSR: | |
3013 | if (shamt == 0) | |
3014 | return (base); | |
3015 | else if (shamt == 32) | |
3016 | { | |
3017 | ASSIGNC (base >> 31); | |
3018 | return (0); | |
3019 | } | |
3020 | else if (shamt > 32) | |
3021 | { | |
3022 | CLEARC; | |
3023 | return (0); | |
3024 | } | |
3025 | else | |
3026 | { | |
3027 | ASSIGNC ((base >> (shamt - 1)) & 1); | |
3028 | return (base >> shamt); | |
3029 | } | |
3030 | case ASR: | |
3031 | if (shamt == 0) | |
3032 | return (base); | |
3033 | else if (shamt >= 32) | |
3034 | { | |
3035 | ASSIGNC (base >> 31L); | |
3036 | return ((ARMword) ((long int) base >> 31L)); | |
3037 | } | |
3038 | else | |
3039 | { | |
3040 | ASSIGNC ((ARMword) ((long int) base >> (int) (shamt - 1)) & 1); | |
3041 | return ((ARMword) ((long int) base >> (int) shamt)); | |
3042 | } | |
3043 | case ROR: | |
3044 | if (shamt == 0) | |
3045 | return (base); | |
3046 | shamt &= 0x1f; | |
3047 | if (shamt == 0) | |
3048 | { | |
3049 | ASSIGNC (base >> 31); | |
3050 | return (base); | |
3051 | } | |
3052 | else | |
3053 | { | |
3054 | ASSIGNC ((base >> (shamt - 1)) & 1); | |
3055 | return ((base << (32 - shamt)) | (base >> shamt)); | |
3056 | } | |
3057 | } | |
c906108c | 3058 | } |
dfcd3bfb JM |
3059 | else |
3060 | { /* shift amount is a constant */ | |
c906108c | 3061 | #ifndef MODE32 |
dfcd3bfb JM |
3062 | if (base == 15) |
3063 | base = ECC | ER15INT | R15PC | EMODE; | |
3064 | else | |
3065 | #endif | |
3066 | base = state->Reg[base]; | |
3067 | shamt = BITS (7, 11); | |
3068 | switch ((int) BITS (5, 6)) | |
3069 | { | |
3070 | case LSL: | |
3071 | ASSIGNC ((base >> (32 - shamt)) & 1); | |
3072 | return (base << shamt); | |
3073 | case LSR: | |
3074 | if (shamt == 0) | |
3075 | { | |
3076 | ASSIGNC (base >> 31); | |
3077 | return (0); | |
3078 | } | |
3079 | else | |
3080 | { | |
3081 | ASSIGNC ((base >> (shamt - 1)) & 1); | |
3082 | return (base >> shamt); | |
3083 | } | |
3084 | case ASR: | |
3085 | if (shamt == 0) | |
3086 | { | |
3087 | ASSIGNC (base >> 31L); | |
3088 | return ((ARMword) ((long int) base >> 31L)); | |
3089 | } | |
3090 | else | |
3091 | { | |
3092 | ASSIGNC ((ARMword) ((long int) base >> (int) (shamt - 1)) & 1); | |
3093 | return ((ARMword) ((long int) base >> (int) shamt)); | |
3094 | } | |
3095 | case ROR: | |
3096 | if (shamt == 0) | |
3097 | { /* its an RRX */ | |
3098 | shamt = CFLAG; | |
3099 | ASSIGNC (base & 1); | |
3100 | return ((base >> 1) | (shamt << 31)); | |
3101 | } | |
3102 | else | |
3103 | { | |
3104 | ASSIGNC ((base >> (shamt - 1)) & 1); | |
3105 | return ((base << (32 - shamt)) | (base >> shamt)); | |
3106 | } | |
3107 | } | |
c906108c | 3108 | } |
dfcd3bfb JM |
3109 | return (0); /* just to shut up lint */ |
3110 | } | |
c906108c SS |
3111 | |
3112 | /***************************************************************************\ | |
3113 | * This routine handles writes to register 15 when the S bit is not set. * | |
3114 | \***************************************************************************/ | |
3115 | ||
dfcd3bfb JM |
3116 | static void |
3117 | WriteR15 (ARMul_State * state, ARMword src) | |
c906108c SS |
3118 | { |
3119 | /* The ARM documentation implies (but doe snot state) that the bottom bit of the PC is never set */ | |
3120 | #ifdef MODE32 | |
dfcd3bfb | 3121 | state->Reg[15] = src & PCBITS & ~0x1; |
c906108c | 3122 | #else |
dfcd3bfb JM |
3123 | state->Reg[15] = (src & R15PCBITS & ~0x1) | ECC | ER15INT | EMODE; |
3124 | ARMul_R15Altered (state); | |
c906108c | 3125 | #endif |
dfcd3bfb JM |
3126 | FLUSHPIPE; |
3127 | } | |
c906108c SS |
3128 | |
3129 | /***************************************************************************\ | |
3130 | * This routine handles writes to register 15 when the S bit is set. * | |
3131 | \***************************************************************************/ | |
3132 | ||
dfcd3bfb JM |
3133 | static void |
3134 | WriteSR15 (ARMul_State * state, ARMword src) | |
c906108c SS |
3135 | { |
3136 | #ifdef MODE32 | |
dfcd3bfb JM |
3137 | state->Reg[15] = src & PCBITS; |
3138 | if (state->Bank > 0) | |
3139 | { | |
3140 | state->Cpsr = state->Spsr[state->Bank]; | |
3141 | ARMul_CPSRAltered (state); | |
c906108c SS |
3142 | } |
3143 | #else | |
dfcd3bfb JM |
3144 | if (state->Bank == USERBANK) |
3145 | state->Reg[15] = (src & (CCBITS | R15PCBITS)) | ER15INT | EMODE; | |
3146 | else | |
3147 | state->Reg[15] = src; | |
3148 | ARMul_R15Altered (state); | |
c906108c | 3149 | #endif |
dfcd3bfb JM |
3150 | FLUSHPIPE; |
3151 | } | |
c906108c SS |
3152 | |
3153 | /***************************************************************************\ | |
3154 | * This routine evaluates most Load and Store register RHS's. It is * | |
3155 | * intended to be called from the macro LSRegRHS, which filters the * | |
3156 | * common case of an unshifted register with in line code * | |
3157 | \***************************************************************************/ | |
3158 | ||
dfcd3bfb JM |
3159 | static ARMword |
3160 | GetLSRegRHS (ARMul_State * state, ARMword instr) | |
3161 | { | |
3162 | ARMword shamt, base; | |
c906108c | 3163 | |
dfcd3bfb | 3164 | base = RHSReg; |
c906108c | 3165 | #ifndef MODE32 |
dfcd3bfb JM |
3166 | if (base == 15) |
3167 | base = ECC | ER15INT | R15PC | EMODE; /* Now forbidden, but .... */ | |
3168 | else | |
3169 | #endif | |
3170 | base = state->Reg[base]; | |
3171 | ||
3172 | shamt = BITS (7, 11); | |
3173 | switch ((int) BITS (5, 6)) | |
3174 | { | |
3175 | case LSL: | |
3176 | return (base << shamt); | |
3177 | case LSR: | |
3178 | if (shamt == 0) | |
3179 | return (0); | |
3180 | else | |
3181 | return (base >> shamt); | |
3182 | case ASR: | |
3183 | if (shamt == 0) | |
3184 | return ((ARMword) ((long int) base >> 31L)); | |
3185 | else | |
3186 | return ((ARMword) ((long int) base >> (int) shamt)); | |
3187 | case ROR: | |
3188 | if (shamt == 0) /* its an RRX */ | |
3189 | return ((base >> 1) | (CFLAG << 31)); | |
3190 | else | |
3191 | return ((base << (32 - shamt)) | (base >> shamt)); | |
c906108c | 3192 | } |
dfcd3bfb JM |
3193 | return (0); /* just to shut up lint */ |
3194 | } | |
c906108c SS |
3195 | |
3196 | /***************************************************************************\ | |
3197 | * This routine evaluates the ARM7T halfword and signed transfer RHS's. * | |
3198 | \***************************************************************************/ | |
3199 | ||
dfcd3bfb JM |
3200 | static ARMword |
3201 | GetLS7RHS (ARMul_State * state, ARMword instr) | |
c906108c | 3202 | { |
dfcd3bfb JM |
3203 | if (BIT (22) == 0) |
3204 | { /* register */ | |
c906108c | 3205 | #ifndef MODE32 |
dfcd3bfb JM |
3206 | if (RHSReg == 15) |
3207 | return ECC | ER15INT | R15PC | EMODE; /* Now forbidden, but ... */ | |
c906108c | 3208 | #endif |
dfcd3bfb | 3209 | return state->Reg[RHSReg]; |
c906108c SS |
3210 | } |
3211 | ||
dfcd3bfb JM |
3212 | /* else immediate */ |
3213 | return BITS (0, 3) | (BITS (8, 11) << 4); | |
3214 | } | |
c906108c SS |
3215 | |
3216 | /***************************************************************************\ | |
3217 | * This function does the work of loading a word for a LDR instruction. * | |
3218 | \***************************************************************************/ | |
3219 | ||
dfcd3bfb JM |
3220 | static unsigned |
3221 | LoadWord (ARMul_State * state, ARMword instr, ARMword address) | |
c906108c | 3222 | { |
dfcd3bfb | 3223 | ARMword dest; |
c906108c | 3224 | |
dfcd3bfb | 3225 | BUSUSEDINCPCS; |
c906108c | 3226 | #ifndef MODE32 |
dfcd3bfb JM |
3227 | if (ADDREXCEPT (address)) |
3228 | { | |
3229 | INTERNALABORT (address); | |
c906108c SS |
3230 | } |
3231 | #endif | |
dfcd3bfb JM |
3232 | dest = ARMul_LoadWordN (state, address); |
3233 | if (state->Aborted) | |
3234 | { | |
3235 | TAKEABORT; | |
3236 | return (state->lateabtSig); | |
c906108c | 3237 | } |
dfcd3bfb JM |
3238 | if (address & 3) |
3239 | dest = ARMul_Align (state, address, dest); | |
3240 | WRITEDEST (dest); | |
3241 | ARMul_Icycles (state, 1, 0L); | |
c906108c | 3242 | |
dfcd3bfb | 3243 | return (DESTReg != LHSReg); |
c906108c SS |
3244 | } |
3245 | ||
3246 | #ifdef MODET | |
3247 | /***************************************************************************\ | |
3248 | * This function does the work of loading a halfword. * | |
3249 | \***************************************************************************/ | |
3250 | ||
dfcd3bfb JM |
3251 | static unsigned |
3252 | LoadHalfWord (ARMul_State * state, ARMword instr, ARMword address, | |
3253 | int signextend) | |
c906108c | 3254 | { |
dfcd3bfb | 3255 | ARMword dest; |
c906108c | 3256 | |
dfcd3bfb | 3257 | BUSUSEDINCPCS; |
c906108c | 3258 | #ifndef MODE32 |
dfcd3bfb JM |
3259 | if (ADDREXCEPT (address)) |
3260 | { | |
3261 | INTERNALABORT (address); | |
c906108c SS |
3262 | } |
3263 | #endif | |
dfcd3bfb JM |
3264 | dest = ARMul_LoadHalfWord (state, address); |
3265 | if (state->Aborted) | |
3266 | { | |
3267 | TAKEABORT; | |
3268 | return (state->lateabtSig); | |
c906108c | 3269 | } |
dfcd3bfb JM |
3270 | UNDEF_LSRBPC; |
3271 | if (signextend) | |
3272 | { | |
3273 | if (dest & 1 << (16 - 1)) | |
3274 | dest = (dest & ((1 << 16) - 1)) - (1 << 16); | |
3275 | } | |
3276 | WRITEDEST (dest); | |
3277 | ARMul_Icycles (state, 1, 0L); | |
3278 | return (DESTReg != LHSReg); | |
c906108c | 3279 | } |
dfcd3bfb | 3280 | |
c906108c SS |
3281 | #endif /* MODET */ |
3282 | ||
3283 | /***************************************************************************\ | |
3284 | * This function does the work of loading a byte for a LDRB instruction. * | |
3285 | \***************************************************************************/ | |
3286 | ||
dfcd3bfb JM |
3287 | static unsigned |
3288 | LoadByte (ARMul_State * state, ARMword instr, ARMword address, int signextend) | |
c906108c | 3289 | { |
dfcd3bfb | 3290 | ARMword dest; |
c906108c | 3291 | |
dfcd3bfb | 3292 | BUSUSEDINCPCS; |
c906108c | 3293 | #ifndef MODE32 |
dfcd3bfb JM |
3294 | if (ADDREXCEPT (address)) |
3295 | { | |
3296 | INTERNALABORT (address); | |
c906108c SS |
3297 | } |
3298 | #endif | |
dfcd3bfb JM |
3299 | dest = ARMul_LoadByte (state, address); |
3300 | if (state->Aborted) | |
3301 | { | |
3302 | TAKEABORT; | |
3303 | return (state->lateabtSig); | |
3304 | } | |
3305 | UNDEF_LSRBPC; | |
3306 | if (signextend) | |
3307 | { | |
3308 | if (dest & 1 << (8 - 1)) | |
3309 | dest = (dest & ((1 << 8) - 1)) - (1 << 8); | |
c906108c | 3310 | } |
dfcd3bfb JM |
3311 | WRITEDEST (dest); |
3312 | ARMul_Icycles (state, 1, 0L); | |
3313 | return (DESTReg != LHSReg); | |
c906108c SS |
3314 | } |
3315 | ||
3316 | /***************************************************************************\ | |
3317 | * This function does the work of storing a word from a STR instruction. * | |
3318 | \***************************************************************************/ | |
3319 | ||
dfcd3bfb JM |
3320 | static unsigned |
3321 | StoreWord (ARMul_State * state, ARMword instr, ARMword address) | |
3322 | { | |
3323 | BUSUSEDINCPCN; | |
c906108c | 3324 | #ifndef MODE32 |
dfcd3bfb JM |
3325 | if (DESTReg == 15) |
3326 | state->Reg[15] = ECC | ER15INT | R15PC | EMODE; | |
c906108c SS |
3327 | #endif |
3328 | #ifdef MODE32 | |
dfcd3bfb | 3329 | ARMul_StoreWordN (state, address, DEST); |
c906108c | 3330 | #else |
dfcd3bfb JM |
3331 | if (VECTORACCESS (address) || ADDREXCEPT (address)) |
3332 | { | |
3333 | INTERNALABORT (address); | |
3334 | (void) ARMul_LoadWordN (state, address); | |
c906108c | 3335 | } |
dfcd3bfb JM |
3336 | else |
3337 | ARMul_StoreWordN (state, address, DEST); | |
c906108c | 3338 | #endif |
dfcd3bfb JM |
3339 | if (state->Aborted) |
3340 | { | |
3341 | TAKEABORT; | |
3342 | return (state->lateabtSig); | |
c906108c | 3343 | } |
dfcd3bfb | 3344 | return (TRUE); |
c906108c SS |
3345 | } |
3346 | ||
3347 | #ifdef MODET | |
3348 | /***************************************************************************\ | |
3349 | * This function does the work of storing a byte for a STRH instruction. * | |
3350 | \***************************************************************************/ | |
3351 | ||
dfcd3bfb JM |
3352 | static unsigned |
3353 | StoreHalfWord (ARMul_State * state, ARMword instr, ARMword address) | |
3354 | { | |
3355 | BUSUSEDINCPCN; | |
c906108c SS |
3356 | |
3357 | #ifndef MODE32 | |
dfcd3bfb JM |
3358 | if (DESTReg == 15) |
3359 | state->Reg[15] = ECC | ER15INT | R15PC | EMODE; | |
c906108c SS |
3360 | #endif |
3361 | ||
3362 | #ifdef MODE32 | |
dfcd3bfb | 3363 | ARMul_StoreHalfWord (state, address, DEST); |
c906108c | 3364 | #else |
dfcd3bfb JM |
3365 | if (VECTORACCESS (address) || ADDREXCEPT (address)) |
3366 | { | |
3367 | INTERNALABORT (address); | |
3368 | (void) ARMul_LoadHalfWord (state, address); | |
c906108c | 3369 | } |
dfcd3bfb JM |
3370 | else |
3371 | ARMul_StoreHalfWord (state, address, DEST); | |
c906108c SS |
3372 | #endif |
3373 | ||
dfcd3bfb JM |
3374 | if (state->Aborted) |
3375 | { | |
3376 | TAKEABORT; | |
3377 | return (state->lateabtSig); | |
c906108c SS |
3378 | } |
3379 | ||
dfcd3bfb | 3380 | return (TRUE); |
c906108c | 3381 | } |
dfcd3bfb | 3382 | |
c906108c SS |
3383 | #endif /* MODET */ |
3384 | ||
3385 | /***************************************************************************\ | |
3386 | * This function does the work of storing a byte for a STRB instruction. * | |
3387 | \***************************************************************************/ | |
3388 | ||
dfcd3bfb JM |
3389 | static unsigned |
3390 | StoreByte (ARMul_State * state, ARMword instr, ARMword address) | |
3391 | { | |
3392 | BUSUSEDINCPCN; | |
c906108c | 3393 | #ifndef MODE32 |
dfcd3bfb JM |
3394 | if (DESTReg == 15) |
3395 | state->Reg[15] = ECC | ER15INT | R15PC | EMODE; | |
c906108c SS |
3396 | #endif |
3397 | #ifdef MODE32 | |
dfcd3bfb | 3398 | ARMul_StoreByte (state, address, DEST); |
c906108c | 3399 | #else |
dfcd3bfb JM |
3400 | if (VECTORACCESS (address) || ADDREXCEPT (address)) |
3401 | { | |
3402 | INTERNALABORT (address); | |
3403 | (void) ARMul_LoadByte (state, address); | |
c906108c | 3404 | } |
dfcd3bfb JM |
3405 | else |
3406 | ARMul_StoreByte (state, address, DEST); | |
c906108c | 3407 | #endif |
dfcd3bfb JM |
3408 | if (state->Aborted) |
3409 | { | |
3410 | TAKEABORT; | |
3411 | return (state->lateabtSig); | |
c906108c | 3412 | } |
dfcd3bfb JM |
3413 | UNDEF_LSRBPC; |
3414 | return (TRUE); | |
c906108c SS |
3415 | } |
3416 | ||
3417 | /***************************************************************************\ | |
3418 | * This function does the work of loading the registers listed in an LDM * | |
3419 | * instruction, when the S bit is clear. The code here is always increment * | |
3420 | * after, it's up to the caller to get the input address correct and to * | |
3421 | * handle base register modification. * | |
3422 | \***************************************************************************/ | |
3423 | ||
dfcd3bfb JM |
3424 | static void |
3425 | LoadMult (ARMul_State * state, ARMword instr, ARMword address, ARMword WBBase) | |
3426 | { | |
3427 | ARMword dest, temp; | |
c906108c | 3428 | |
dfcd3bfb JM |
3429 | UNDEF_LSMNoRegs; |
3430 | UNDEF_LSMPCBase; | |
3431 | UNDEF_LSMBaseInListWb; | |
3432 | BUSUSEDINCPCS; | |
c906108c | 3433 | #ifndef MODE32 |
dfcd3bfb JM |
3434 | if (ADDREXCEPT (address)) |
3435 | { | |
3436 | INTERNALABORT (address); | |
c906108c SS |
3437 | } |
3438 | #endif | |
dfcd3bfb JM |
3439 | if (BIT (21) && LHSReg != 15) |
3440 | LSBase = WBBase; | |
3441 | ||
3442 | for (temp = 0; !BIT (temp); temp++); /* N cycle first */ | |
3443 | dest = ARMul_LoadWordN (state, address); | |
3444 | if (!state->abortSig && !state->Aborted) | |
3445 | state->Reg[temp++] = dest; | |
3446 | else if (!state->Aborted) | |
3447 | state->Aborted = ARMul_DataAbortV; | |
3448 | ||
3449 | for (; temp < 16; temp++) /* S cycles from here on */ | |
3450 | if (BIT (temp)) | |
3451 | { /* load this register */ | |
3452 | address += 4; | |
3453 | dest = ARMul_LoadWordS (state, address); | |
3454 | if (!state->abortSig && !state->Aborted) | |
3455 | state->Reg[temp] = dest; | |
3456 | else if (!state->Aborted) | |
3457 | state->Aborted = ARMul_DataAbortV; | |
3458 | } | |
3459 | ||
3460 | if (BIT (15)) | |
3461 | { /* PC is in the reg list */ | |
c906108c | 3462 | #ifdef MODE32 |
dfcd3bfb | 3463 | state->Reg[15] = PC; |
c906108c | 3464 | #endif |
dfcd3bfb | 3465 | FLUSHPIPE; |
c906108c SS |
3466 | } |
3467 | ||
dfcd3bfb | 3468 | ARMul_Icycles (state, 1, 0L); /* to write back the final register */ |
c906108c | 3469 | |
dfcd3bfb JM |
3470 | if (state->Aborted) |
3471 | { | |
3472 | if (BIT (21) && LHSReg != 15) | |
3473 | LSBase = WBBase; | |
3474 | TAKEABORT; | |
c906108c | 3475 | } |
dfcd3bfb | 3476 | } |
c906108c SS |
3477 | |
3478 | /***************************************************************************\ | |
3479 | * This function does the work of loading the registers listed in an LDM * | |
3480 | * instruction, when the S bit is set. The code here is always increment * | |
3481 | * after, it's up to the caller to get the input address correct and to * | |
3482 | * handle base register modification. * | |
3483 | \***************************************************************************/ | |
3484 | ||
dfcd3bfb JM |
3485 | static void |
3486 | LoadSMult (ARMul_State * state, ARMword instr, | |
3487 | ARMword address, ARMword WBBase) | |
3488 | { | |
3489 | ARMword dest, temp; | |
c906108c | 3490 | |
dfcd3bfb JM |
3491 | UNDEF_LSMNoRegs; |
3492 | UNDEF_LSMPCBase; | |
3493 | UNDEF_LSMBaseInListWb; | |
3494 | BUSUSEDINCPCS; | |
c906108c | 3495 | #ifndef MODE32 |
dfcd3bfb JM |
3496 | if (ADDREXCEPT (address)) |
3497 | { | |
3498 | INTERNALABORT (address); | |
c906108c SS |
3499 | } |
3500 | #endif | |
3501 | ||
dfcd3bfb JM |
3502 | if (!BIT (15) && state->Bank != USERBANK) |
3503 | { | |
3504 | (void) ARMul_SwitchMode (state, state->Mode, USER26MODE); /* temporary reg bank switch */ | |
3505 | UNDEF_LSMUserBankWb; | |
c906108c SS |
3506 | } |
3507 | ||
dfcd3bfb JM |
3508 | if (BIT (21) && LHSReg != 15) |
3509 | LSBase = WBBase; | |
3510 | ||
3511 | for (temp = 0; !BIT (temp); temp++); /* N cycle first */ | |
3512 | dest = ARMul_LoadWordN (state, address); | |
3513 | if (!state->abortSig) | |
3514 | state->Reg[temp++] = dest; | |
3515 | else if (!state->Aborted) | |
3516 | state->Aborted = ARMul_DataAbortV; | |
3517 | ||
3518 | for (; temp < 16; temp++) /* S cycles from here on */ | |
3519 | if (BIT (temp)) | |
3520 | { /* load this register */ | |
3521 | address += 4; | |
3522 | dest = ARMul_LoadWordS (state, address); | |
3523 | if (!state->abortSig || state->Aborted) | |
3524 | state->Reg[temp] = dest; | |
3525 | else if (!state->Aborted) | |
3526 | state->Aborted = ARMul_DataAbortV; | |
3527 | } | |
3528 | ||
3529 | if (BIT (15)) | |
3530 | { /* PC is in the reg list */ | |
c906108c | 3531 | #ifdef MODE32 |
dfcd3bfb JM |
3532 | if (state->Mode != USER26MODE && state->Mode != USER32MODE) |
3533 | { | |
3534 | state->Cpsr = GETSPSR (state->Bank); | |
3535 | ARMul_CPSRAltered (state); | |
3536 | } | |
3537 | state->Reg[15] = PC; | |
c906108c | 3538 | #else |
dfcd3bfb JM |
3539 | if (state->Mode == USER26MODE || state->Mode == USER32MODE) |
3540 | { /* protect bits in user mode */ | |
3541 | ASSIGNN ((state->Reg[15] & NBIT) != 0); | |
3542 | ASSIGNZ ((state->Reg[15] & ZBIT) != 0); | |
3543 | ASSIGNC ((state->Reg[15] & CBIT) != 0); | |
3544 | ASSIGNV ((state->Reg[15] & VBIT) != 0); | |
3545 | } | |
3546 | else | |
3547 | ARMul_R15Altered (state); | |
3548 | #endif | |
3549 | FLUSHPIPE; | |
c906108c SS |
3550 | } |
3551 | ||
dfcd3bfb JM |
3552 | if (!BIT (15) && state->Mode != USER26MODE && state->Mode != USER32MODE) |
3553 | (void) ARMul_SwitchMode (state, USER26MODE, state->Mode); /* restore the correct bank */ | |
c906108c | 3554 | |
dfcd3bfb | 3555 | ARMul_Icycles (state, 1, 0L); /* to write back the final register */ |
c906108c | 3556 | |
dfcd3bfb JM |
3557 | if (state->Aborted) |
3558 | { | |
3559 | if (BIT (21) && LHSReg != 15) | |
3560 | LSBase = WBBase; | |
3561 | TAKEABORT; | |
c906108c SS |
3562 | } |
3563 | ||
3564 | } | |
3565 | ||
3566 | /***************************************************************************\ | |
3567 | * This function does the work of storing the registers listed in an STM * | |
3568 | * instruction, when the S bit is clear. The code here is always increment * | |
3569 | * after, it's up to the caller to get the input address correct and to * | |
3570 | * handle base register modification. * | |
3571 | \***************************************************************************/ | |
3572 | ||
dfcd3bfb JM |
3573 | static void |
3574 | StoreMult (ARMul_State * state, ARMword instr, | |
3575 | ARMword address, ARMword WBBase) | |
3576 | { | |
3577 | ARMword temp; | |
c906108c | 3578 | |
dfcd3bfb JM |
3579 | UNDEF_LSMNoRegs; |
3580 | UNDEF_LSMPCBase; | |
3581 | UNDEF_LSMBaseInListWb; | |
3582 | if (!TFLAG) | |
3583 | { | |
3584 | BUSUSEDINCPCN; /* N-cycle, increment the PC and update the NextInstr state */ | |
3585 | } | |
c906108c SS |
3586 | |
3587 | #ifndef MODE32 | |
dfcd3bfb JM |
3588 | if (VECTORACCESS (address) || ADDREXCEPT (address)) |
3589 | { | |
3590 | INTERNALABORT (address); | |
c906108c | 3591 | } |
dfcd3bfb JM |
3592 | if (BIT (15)) |
3593 | PATCHR15; | |
c906108c SS |
3594 | #endif |
3595 | ||
dfcd3bfb | 3596 | for (temp = 0; !BIT (temp); temp++); /* N cycle first */ |
c906108c | 3597 | #ifdef MODE32 |
dfcd3bfb | 3598 | ARMul_StoreWordN (state, address, state->Reg[temp++]); |
c906108c | 3599 | #else |
dfcd3bfb JM |
3600 | if (state->Aborted) |
3601 | { | |
3602 | (void) ARMul_LoadWordN (state, address); | |
3603 | for (; temp < 16; temp++) /* Fake the Stores as Loads */ | |
3604 | if (BIT (temp)) | |
3605 | { /* save this register */ | |
3606 | address += 4; | |
3607 | (void) ARMul_LoadWordS (state, address); | |
3608 | } | |
3609 | if (BIT (21) && LHSReg != 15) | |
3610 | LSBase = WBBase; | |
3611 | TAKEABORT; | |
3612 | return; | |
3613 | } | |
3614 | else | |
3615 | ARMul_StoreWordN (state, address, state->Reg[temp++]); | |
3616 | #endif | |
3617 | if (state->abortSig && !state->Aborted) | |
3618 | state->Aborted = ARMul_DataAbortV; | |
3619 | ||
3620 | if (BIT (21) && LHSReg != 15) | |
3621 | LSBase = WBBase; | |
3622 | ||
3623 | for (; temp < 16; temp++) /* S cycles from here on */ | |
3624 | if (BIT (temp)) | |
3625 | { /* save this register */ | |
3626 | address += 4; | |
3627 | ARMul_StoreWordS (state, address, state->Reg[temp]); | |
3628 | if (state->abortSig && !state->Aborted) | |
3629 | state->Aborted = ARMul_DataAbortV; | |
3630 | } | |
3631 | if (state->Aborted) | |
3632 | { | |
3633 | TAKEABORT; | |
c906108c | 3634 | } |
dfcd3bfb | 3635 | } |
c906108c SS |
3636 | |
3637 | /***************************************************************************\ | |
3638 | * This function does the work of storing the registers listed in an STM * | |
3639 | * instruction when the S bit is set. The code here is always increment * | |
3640 | * after, it's up to the caller to get the input address correct and to * | |
3641 | * handle base register modification. * | |
3642 | \***************************************************************************/ | |
3643 | ||
dfcd3bfb JM |
3644 | static void |
3645 | StoreSMult (ARMul_State * state, ARMword instr, | |
3646 | ARMword address, ARMword WBBase) | |
3647 | { | |
3648 | ARMword temp; | |
c906108c | 3649 | |
dfcd3bfb JM |
3650 | UNDEF_LSMNoRegs; |
3651 | UNDEF_LSMPCBase; | |
3652 | UNDEF_LSMBaseInListWb; | |
3653 | BUSUSEDINCPCN; | |
c906108c | 3654 | #ifndef MODE32 |
dfcd3bfb JM |
3655 | if (VECTORACCESS (address) || ADDREXCEPT (address)) |
3656 | { | |
3657 | INTERNALABORT (address); | |
c906108c | 3658 | } |
dfcd3bfb JM |
3659 | if (BIT (15)) |
3660 | PATCHR15; | |
c906108c SS |
3661 | #endif |
3662 | ||
dfcd3bfb JM |
3663 | if (state->Bank != USERBANK) |
3664 | { | |
3665 | (void) ARMul_SwitchMode (state, state->Mode, USER26MODE); /* Force User Bank */ | |
3666 | UNDEF_LSMUserBankWb; | |
c906108c SS |
3667 | } |
3668 | ||
dfcd3bfb | 3669 | for (temp = 0; !BIT (temp); temp++); /* N cycle first */ |
c906108c | 3670 | #ifdef MODE32 |
dfcd3bfb | 3671 | ARMul_StoreWordN (state, address, state->Reg[temp++]); |
c906108c | 3672 | #else |
dfcd3bfb JM |
3673 | if (state->Aborted) |
3674 | { | |
3675 | (void) ARMul_LoadWordN (state, address); | |
3676 | for (; temp < 16; temp++) /* Fake the Stores as Loads */ | |
3677 | if (BIT (temp)) | |
3678 | { /* save this register */ | |
3679 | address += 4; | |
3680 | (void) ARMul_LoadWordS (state, address); | |
3681 | } | |
3682 | if (BIT (21) && LHSReg != 15) | |
3683 | LSBase = WBBase; | |
3684 | TAKEABORT; | |
3685 | return; | |
c906108c | 3686 | } |
dfcd3bfb JM |
3687 | else |
3688 | ARMul_StoreWordN (state, address, state->Reg[temp++]); | |
c906108c | 3689 | #endif |
dfcd3bfb JM |
3690 | if (state->abortSig && !state->Aborted) |
3691 | state->Aborted = ARMul_DataAbortV; | |
c906108c | 3692 | |
dfcd3bfb JM |
3693 | if (BIT (21) && LHSReg != 15) |
3694 | LSBase = WBBase; | |
c906108c | 3695 | |
dfcd3bfb JM |
3696 | for (; temp < 16; temp++) /* S cycles from here on */ |
3697 | if (BIT (temp)) | |
3698 | { /* save this register */ | |
3699 | address += 4; | |
3700 | ARMul_StoreWordS (state, address, state->Reg[temp]); | |
3701 | if (state->abortSig && !state->Aborted) | |
3702 | state->Aborted = ARMul_DataAbortV; | |
3703 | } | |
c906108c | 3704 | |
dfcd3bfb JM |
3705 | if (state->Mode != USER26MODE && state->Mode != USER32MODE) |
3706 | (void) ARMul_SwitchMode (state, USER26MODE, state->Mode); /* restore the correct bank */ | |
c906108c | 3707 | |
dfcd3bfb JM |
3708 | if (state->Aborted) |
3709 | { | |
3710 | TAKEABORT; | |
c906108c SS |
3711 | } |
3712 | } | |
3713 | ||
3714 | /***************************************************************************\ | |
3715 | * This function does the work of adding two 32bit values together, and * | |
3716 | * calculating if a carry has occurred. * | |
3717 | \***************************************************************************/ | |
3718 | ||
dfcd3bfb JM |
3719 | static ARMword |
3720 | Add32 (ARMword a1, ARMword a2, int *carry) | |
c906108c SS |
3721 | { |
3722 | ARMword result = (a1 + a2); | |
dfcd3bfb JM |
3723 | unsigned int uresult = (unsigned int) result; |
3724 | unsigned int ua1 = (unsigned int) a1; | |
c906108c SS |
3725 | |
3726 | /* If (result == RdLo) and (state->Reg[nRdLo] == 0), | |
3727 | or (result > RdLo) then we have no carry: */ | |
3728 | if ((uresult == ua1) ? (a2 != 0) : (uresult < ua1)) | |
dfcd3bfb | 3729 | *carry = 1; |
c906108c | 3730 | else |
dfcd3bfb | 3731 | *carry = 0; |
c906108c | 3732 | |
dfcd3bfb | 3733 | return (result); |
c906108c SS |
3734 | } |
3735 | ||
3736 | /***************************************************************************\ | |
3737 | * This function does the work of multiplying two 32bit values to give a * | |
3738 | * 64bit result. * | |
3739 | \***************************************************************************/ | |
3740 | ||
dfcd3bfb JM |
3741 | static unsigned |
3742 | Multiply64 (ARMul_State * state, ARMword instr, int msigned, int scc) | |
c906108c | 3743 | { |
dfcd3bfb | 3744 | int nRdHi, nRdLo, nRs, nRm; /* operand register numbers */ |
c906108c | 3745 | ARMword RdHi, RdLo, Rm; |
dfcd3bfb | 3746 | int scount; /* cycle count */ |
c906108c | 3747 | |
dfcd3bfb JM |
3748 | nRdHi = BITS (16, 19); |
3749 | nRdLo = BITS (12, 15); | |
3750 | nRs = BITS (8, 11); | |
3751 | nRm = BITS (0, 3); | |
c906108c SS |
3752 | |
3753 | /* Needed to calculate the cycle count: */ | |
3754 | Rm = state->Reg[nRm]; | |
3755 | ||
3756 | /* Check for illegal operand combinations first: */ | |
dfcd3bfb | 3757 | if (nRdHi != 15 |
c906108c | 3758 | && nRdLo != 15 |
dfcd3bfb JM |
3759 | && nRs != 15 |
3760 | && nRm != 15 && nRdHi != nRdLo && nRdHi != nRm && nRdLo != nRm) | |
c906108c | 3761 | { |
dfcd3bfb | 3762 | ARMword lo, mid1, mid2, hi; /* intermediate results */ |
c906108c | 3763 | int carry; |
dfcd3bfb | 3764 | ARMword Rs = state->Reg[nRs]; |
c906108c SS |
3765 | int sign = 0; |
3766 | ||
3767 | if (msigned) | |
3768 | { | |
3769 | /* Compute sign of result and adjust operands if necessary. */ | |
dfcd3bfb | 3770 | |
c906108c | 3771 | sign = (Rm ^ Rs) & 0x80000000; |
dfcd3bfb JM |
3772 | |
3773 | if (((signed long) Rm) < 0) | |
c906108c | 3774 | Rm = -Rm; |
dfcd3bfb JM |
3775 | |
3776 | if (((signed long) Rs) < 0) | |
c906108c SS |
3777 | Rs = -Rs; |
3778 | } | |
dfcd3bfb | 3779 | |
c906108c | 3780 | /* We can split the 32x32 into four 16x16 operations. This ensures |
dfcd3bfb JM |
3781 | that we do not lose precision on 32bit only hosts: */ |
3782 | lo = ((Rs & 0xFFFF) * (Rm & 0xFFFF)); | |
c906108c SS |
3783 | mid1 = ((Rs & 0xFFFF) * ((Rm >> 16) & 0xFFFF)); |
3784 | mid2 = (((Rs >> 16) & 0xFFFF) * (Rm & 0xFFFF)); | |
dfcd3bfb JM |
3785 | hi = (((Rs >> 16) & 0xFFFF) * ((Rm >> 16) & 0xFFFF)); |
3786 | ||
c906108c | 3787 | /* We now need to add all of these results together, taking care |
dfcd3bfb JM |
3788 | to propogate the carries from the additions: */ |
3789 | RdLo = Add32 (lo, (mid1 << 16), &carry); | |
c906108c | 3790 | RdHi = carry; |
dfcd3bfb JM |
3791 | RdLo = Add32 (RdLo, (mid2 << 16), &carry); |
3792 | RdHi += | |
3793 | (carry + ((mid1 >> 16) & 0xFFFF) + ((mid2 >> 16) & 0xFFFF) + hi); | |
c906108c SS |
3794 | |
3795 | if (sign) | |
3796 | { | |
3797 | /* Negate result if necessary. */ | |
dfcd3bfb JM |
3798 | |
3799 | RdLo = ~RdLo; | |
3800 | RdHi = ~RdHi; | |
c906108c SS |
3801 | if (RdLo == 0xFFFFFFFF) |
3802 | { | |
3803 | RdLo = 0; | |
3804 | RdHi += 1; | |
3805 | } | |
3806 | else | |
3807 | RdLo += 1; | |
3808 | } | |
dfcd3bfb | 3809 | |
c906108c SS |
3810 | state->Reg[nRdLo] = RdLo; |
3811 | state->Reg[nRdHi] = RdHi; | |
dfcd3bfb JM |
3812 | |
3813 | } /* else undefined result */ | |
3814 | else | |
3815 | fprintf (stderr, "MULTIPLY64 - INVALID ARGUMENTS\n"); | |
3816 | ||
c906108c SS |
3817 | if (scc) |
3818 | { | |
3819 | if ((RdHi == 0) && (RdLo == 0)) | |
dfcd3bfb | 3820 | ARMul_NegZero (state, RdHi); /* zero value */ |
c906108c | 3821 | else |
dfcd3bfb | 3822 | ARMul_NegZero (state, scc); /* non-zero value */ |
c906108c | 3823 | } |
dfcd3bfb | 3824 | |
c906108c SS |
3825 | /* The cycle count depends on whether the instruction is a signed or |
3826 | unsigned multiply, and what bits are clear in the multiplier: */ | |
dfcd3bfb JM |
3827 | if (msigned && (Rm & ((unsigned) 1 << 31))) |
3828 | Rm = ~Rm; /* invert the bits to make the check against zero */ | |
3829 | ||
c906108c | 3830 | if ((Rm & 0xFFFFFF00) == 0) |
dfcd3bfb | 3831 | scount = 1; |
c906108c | 3832 | else if ((Rm & 0xFFFF0000) == 0) |
dfcd3bfb | 3833 | scount = 2; |
c906108c | 3834 | else if ((Rm & 0xFF000000) == 0) |
dfcd3bfb | 3835 | scount = 3; |
c906108c | 3836 | else |
dfcd3bfb JM |
3837 | scount = 4; |
3838 | ||
3839 | return 2 + scount; | |
c906108c SS |
3840 | } |
3841 | ||
3842 | /***************************************************************************\ | |
3843 | * This function does the work of multiplying two 32bit values and adding * | |
3844 | * a 64bit value to give a 64bit result. * | |
3845 | \***************************************************************************/ | |
3846 | ||
dfcd3bfb JM |
3847 | static unsigned |
3848 | MultiplyAdd64 (ARMul_State * state, ARMword instr, int msigned, int scc) | |
c906108c SS |
3849 | { |
3850 | unsigned scount; | |
3851 | ARMword RdLo, RdHi; | |
3852 | int nRdHi, nRdLo; | |
3853 | int carry = 0; | |
3854 | ||
dfcd3bfb JM |
3855 | nRdHi = BITS (16, 19); |
3856 | nRdLo = BITS (12, 15); | |
c906108c | 3857 | |
dfcd3bfb JM |
3858 | RdHi = state->Reg[nRdHi]; |
3859 | RdLo = state->Reg[nRdLo]; | |
c906108c | 3860 | |
dfcd3bfb | 3861 | scount = Multiply64 (state, instr, msigned, LDEFAULT); |
c906108c | 3862 | |
dfcd3bfb | 3863 | RdLo = Add32 (RdLo, state->Reg[nRdLo], &carry); |
c906108c SS |
3864 | RdHi = (RdHi + state->Reg[nRdHi]) + carry; |
3865 | ||
3866 | state->Reg[nRdLo] = RdLo; | |
3867 | state->Reg[nRdHi] = RdHi; | |
3868 | ||
dfcd3bfb JM |
3869 | if (scc) |
3870 | { | |
3871 | if ((RdHi == 0) && (RdLo == 0)) | |
3872 | ARMul_NegZero (state, RdHi); /* zero value */ | |
3873 | else | |
3874 | ARMul_NegZero (state, scc); /* non-zero value */ | |
3875 | } | |
c906108c | 3876 | |
dfcd3bfb | 3877 | return scount + 1; /* extra cycle for addition */ |
c906108c | 3878 | } |