lxdream 0.9.1| filename | src/sh4/sh4core.c |
| changeset | 43:0cf3e339cc59 |
| prev | 38:9ccc7ac66a9d |
| next | 53:f2981805b929 |
| author | nkeynes |
| date | Mon Dec 26 11:47:15 2005 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | Add sh4 + arm breakpoints Hook up break button in GUI Enable ARM slice in main loop |
| view | annotate | diff | log | raw |
1 /**
2 * $Id: sh4core.c,v 1.16 2005-12-26 11:47:15 nkeynes Exp $
3 *
4 * SH4 emulation core, and parent module for all the SH4 peripheral
5 * modules.
6 *
7 * Copyright (c) 2005 Nathan Keynes.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
20 #define MODULE sh4_module
21 #include <math.h>
22 #include "dream.h"
23 #include "sh4core.h"
24 #include "sh4mmio.h"
25 #include "mem.h"
26 #include "clock.h"
27 #include "intc.h"
29 /* CPU-generated exception code/vector pairs */
30 #define EXC_POWER_RESET 0x000 /* vector special */
31 #define EXC_MANUAL_RESET 0x020
32 #define EXC_SLOT_ILLEGAL 0x1A0
33 #define EXC_ILLEGAL 0x180
34 #define EXV_ILLEGAL 0x100
35 #define EXC_TRAP 0x160
36 #define EXV_TRAP 0x100
37 #define EXC_FPDISABLE 0x800
38 #define EXV_FPDISABLE 0x100
40 uint32_t sh4_freq = SH4_BASE_RATE;
41 uint32_t sh4_bus_freq = SH4_BASE_RATE;
42 uint32_t sh4_peripheral_freq = SH4_BASE_RATE / 2;
44 uint32_t sh4_cpu_period = 1000 / SH4_BASE_RATE; /* in nanoseconds */
45 uint32_t sh4_bus_period = 1000 / SH4_BASE_RATE;
46 uint32_t sh4_peripheral_period = 2000 / SH4_BASE_RATE;
48 /********************** SH4 Module Definition ****************************/
50 void sh4_init( void );
51 void sh4_reset( void );
52 uint32_t sh4_run_slice( uint32_t );
53 void sh4_start( void );
54 void sh4_stop( void );
55 void sh4_save_state( FILE *f );
56 int sh4_load_state( FILE *f );
58 struct dreamcast_module sh4_module = { "SH4", sh4_init, sh4_reset,
59 NULL, sh4_run_slice, sh4_stop,
60 sh4_save_state, sh4_load_state };
62 struct sh4_registers sh4r;
64 void sh4_init(void)
65 {
66 register_io_regions( mmio_list_sh4mmio );
67 mmu_init();
68 sh4_reset();
69 }
71 void sh4_reset(void)
72 {
73 /* zero everything out, for the sake of having a consistent state. */
74 memset( &sh4r, 0, sizeof(sh4r) );
76 /* Resume running if we were halted */
77 sh4r.sh4_state = SH4_STATE_RUNNING;
79 sh4r.pc = 0xA0000000;
80 sh4r.new_pc= 0xA0000002;
81 sh4r.vbr = 0x00000000;
82 sh4r.fpscr = 0x00040001;
83 sh4r.sr = 0x700000F0;
85 /* Mem reset will do this, but if we want to reset _just_ the SH4... */
86 MMIO_WRITE( MMU, EXPEVT, EXC_POWER_RESET );
88 /* Peripheral modules */
89 intc_reset();
90 SCIF_reset();
91 }
93 static struct breakpoint_struct sh4_breakpoints[MAX_BREAKPOINTS];
94 static int sh4_breakpoint_count = 0;
96 void sh4_set_breakpoint( uint32_t pc, int type )
97 {
98 sh4_breakpoints[sh4_breakpoint_count].address = pc;
99 sh4_breakpoints[sh4_breakpoint_count].type = type;
100 sh4_breakpoint_count++;
101 }
103 gboolean sh4_clear_breakpoint( uint32_t pc, int type )
104 {
105 int i;
107 for( i=0; i<sh4_breakpoint_count; i++ ) {
108 if( sh4_breakpoints[i].address == pc &&
109 sh4_breakpoints[i].type == type ) {
110 while( ++i < sh4_breakpoint_count ) {
111 sh4_breakpoints[i-1].address = sh4_breakpoints[i].address;
112 sh4_breakpoints[i-1].type = sh4_breakpoints[i].type;
113 }
114 sh4_breakpoint_count--;
115 return TRUE;
116 }
117 }
118 return FALSE;
119 }
121 int sh4_get_breakpoint( uint32_t pc )
122 {
123 int i;
124 for( i=0; i<sh4_breakpoint_count; i++ ) {
125 if( sh4_breakpoints[i].address == pc )
126 return sh4_breakpoints[i].type;
127 }
128 return 0;
129 }
131 uint32_t sh4_run_slice( uint32_t nanosecs )
132 {
133 int target = sh4r.icount + nanosecs / sh4_cpu_period;
134 int start = sh4r.icount;
135 int i;
137 if( sh4r.sh4_state != SH4_STATE_RUNNING ) {
138 if( sh4r.int_pending != 0 )
139 sh4r.sh4_state = SH4_STATE_RUNNING;;
140 }
142 while( sh4r.icount < target && sh4r.sh4_state == SH4_STATE_RUNNING ) {
143 sh4r.icount++;
144 if( !sh4_execute_instruction() )
145 break;
146 #ifdef ENABLE_DEBUG_MODE
147 for( i=0; i<sh4_breakpoint_count; i++ ) {
148 if( sh4_breakpoints[i].address == sh4r.pc ) {
149 break;
150 }
151 }
152 if( i != sh4_breakpoint_count ) {
153 dreamcast_stop();
154 if( sh4_breakpoints[i].type == BREAK_ONESHOT )
155 sh4_clear_breakpoint( sh4r.pc, BREAK_ONESHOT );
156 break;
157 }
158 #endif
159 }
161 /* If we aborted early, but the cpu is still technically running,
162 * we're doing a hard abort - cut the timeslice back to what we
163 * actually executed
164 */
165 if( target != sh4r.icount && sh4r.sh4_state == SH4_STATE_RUNNING ) {
166 /* Halted - compute time actually executed */
167 nanosecs = (sh4r.icount - start) * sh4_cpu_period;
168 }
169 if( sh4r.sh4_state != SH4_STATE_STANDBY ) {
170 TMU_run_slice( nanosecs );
171 SCIF_run_slice( nanosecs );
172 }
173 return nanosecs;
174 }
176 void sh4_stop(void)
177 {
179 }
181 void sh4_save_state( FILE *f )
182 {
183 fwrite( &sh4r, sizeof(sh4r), 1, f );
184 SCIF_save_state( f );
185 }
187 int sh4_load_state( FILE * f )
188 {
189 fread( &sh4r, sizeof(sh4r), 1, f );
190 return SCIF_load_state( f );
191 }
193 /********************** SH4 emulation core ****************************/
195 void sh4_set_pc( int pc )
196 {
197 sh4r.pc = pc;
198 sh4r.new_pc = pc+2;
199 }
201 #define UNDEF(ir) do{ ERROR( "Raising exception on undefined instruction at %08x, opcode = %04x", sh4r.pc, ir ); RAISE( EXC_ILLEGAL, EXV_ILLEGAL ); }while(0)
202 #define UNIMP(ir) do{ ERROR( "Halted on unimplemented instruction at %08x, opcode = %04x", sh4r.pc, ir ); dreamcast_stop(); return FALSE; }while(0)
204 #define RAISE( x, v ) do{ \
205 if( sh4r.vbr == 0 ) { \
206 ERROR( "%08X: VBR not initialized while raising exception %03X, halting", sh4r.pc, x ); \
207 sh4_stop(); \
208 } else { \
209 sh4r.spc = sh4r.pc + 2; \
210 sh4r.ssr = sh4_read_sr(); \
211 sh4r.sgr = sh4r.r[15]; \
212 MMIO_WRITE(MMU,EXPEVT,x); \
213 sh4r.pc = sh4r.vbr + v; \
214 sh4r.new_pc = sh4r.pc + 2; \
215 sh4_load_sr( sh4r.ssr |SR_MD|SR_BL|SR_RB ); \
216 } \
217 return TRUE; } while(0)
219 #define MEM_READ_BYTE( addr ) sh4_read_byte(addr)
220 #define MEM_READ_WORD( addr ) sh4_read_word(addr)
221 #define MEM_READ_LONG( addr ) sh4_read_long(addr)
222 #define MEM_WRITE_BYTE( addr, val ) sh4_write_byte(addr, val)
223 #define MEM_WRITE_WORD( addr, val ) sh4_write_word(addr, val)
224 #define MEM_WRITE_LONG( addr, val ) sh4_write_long(addr, val)
226 #define MEM_FP_READ( addr, reg ) if( IS_FPU_DOUBLESIZE() ) { \
227 ((uint32_t *)FR)[(reg)&0xE0] = sh4_read_long(addr); \
228 ((uint32_t *)FR)[(reg)|1] = sh4_read_long(addr+4); \
229 } else ((uint32_t *)FR)[reg] = sh4_read_long(addr)
231 #define MEM_FP_WRITE( addr, reg ) if( IS_FPU_DOUBLESIZE() ) { \
232 sh4_write_long( addr, ((uint32_t *)FR)[(reg)&0xE0] ); \
233 sh4_write_long( addr+4, ((uint32_t *)FR)[(reg)|1] ); \
234 } else sh4_write_long( addr, ((uint32_t *)FR)[reg] )
236 #define FP_WIDTH (IS_FPU_DOUBLESIZE() ? 8 : 4)
238 #define CHECK( x, c, v ) if( !x ) RAISE( c, v )
239 #define CHECKPRIV() CHECK( IS_SH4_PRIVMODE(), EXC_ILLEGAL, EXV_ILLEGAL )
240 #define CHECKFPUEN() CHECK( IS_FPU_ENABLED(), EXC_FPDISABLE, EXV_FPDISABLE )
241 #define CHECKDEST(p) if( (p) == 0 ) { ERROR( "%08X: Branch/jump to NULL, CPU halted", sh4r.pc ); sh4_stop(); return; }
242 #define CHECKSLOTILLEGAL() if(sh4r.in_delay_slot) { RAISE(EXC_SLOT_ILLEGAL,EXV_ILLEGAL); }
244 static void sh4_switch_banks( )
245 {
246 uint32_t tmp[8];
248 memcpy( tmp, sh4r.r, sizeof(uint32_t)*8 );
249 memcpy( sh4r.r, sh4r.r_bank, sizeof(uint32_t)*8 );
250 memcpy( sh4r.r_bank, tmp, sizeof(uint32_t)*8 );
251 }
253 static void sh4_load_sr( uint32_t newval )
254 {
255 if( (newval ^ sh4r.sr) & SR_RB )
256 sh4_switch_banks();
257 sh4r.sr = newval;
258 sh4r.t = (newval&SR_T) ? 1 : 0;
259 sh4r.s = (newval&SR_S) ? 1 : 0;
260 sh4r.m = (newval&SR_M) ? 1 : 0;
261 sh4r.q = (newval&SR_Q) ? 1 : 0;
262 intc_mask_changed();
263 }
265 static uint32_t sh4_read_sr( void )
266 {
267 /* synchronize sh4r.sr with the various bitflags */
268 sh4r.sr &= SR_MQSTMASK;
269 if( sh4r.t ) sh4r.sr |= SR_T;
270 if( sh4r.s ) sh4r.sr |= SR_S;
271 if( sh4r.m ) sh4r.sr |= SR_M;
272 if( sh4r.q ) sh4r.sr |= SR_Q;
273 return sh4r.sr;
274 }
275 /* function for external use */
276 void sh4_raise_exception( int code, int vector )
277 {
278 RAISE(code, vector);
279 }
281 static void sh4_accept_interrupt( void )
282 {
283 uint32_t code = intc_accept_interrupt();
284 sh4r.ssr = sh4_read_sr();
285 sh4r.spc = sh4r.pc;
286 sh4r.sgr = sh4r.r[15];
287 sh4_load_sr( sh4r.ssr|SR_BL|SR_MD|SR_RB );
288 MMIO_WRITE( MMU, INTEVT, code );
289 sh4r.pc = sh4r.vbr + 0x600;
290 sh4r.new_pc = sh4r.pc + 2;
291 WARN( "Accepting interrupt %03X, from %08X => %08X", code, sh4r.spc, sh4r.pc );
292 }
294 gboolean sh4_execute_instruction( void )
295 {
296 int pc;
297 unsigned short ir;
298 uint32_t tmp;
299 uint64_t tmpl;
301 #define R0 sh4r.r[0]
302 #define FR0 (FR[0])
303 #define RN(ir) sh4r.r[(ir&0x0F00)>>8]
304 #define RN_BANK(ir) sh4r.r_bank[(ir&0x0070)>>4]
305 #define RM(ir) sh4r.r[(ir&0x00F0)>>4]
306 #define DISP4(ir) (ir&0x000F) /* 4-bit displacements are *NOT* sign-extended */
307 #define DISP8(ir) (ir&0x00FF)
308 #define PCDISP8(ir) SIGNEXT8(ir&0x00FF)
309 #define IMM8(ir) SIGNEXT8(ir&0x00FF)
310 #define UIMM8(ir) (ir&0x00FF) /* Unsigned immmediate */
311 #define DISP12(ir) SIGNEXT12(ir&0x0FFF)
312 #define FVN(ir) ((ir&0x0C00)>>8)
313 #define FVM(ir) ((ir&0x0300)>>6)
314 #define FRN(ir) (FR[(ir&0x0F00)>>8])
315 #define FRM(ir) (FR[(ir&0x00F0)>>4])
316 #define FRNi(ir) (((uint32_t *)FR)[(ir&0x0F00)>>8])
317 #define FRMi(ir) (((uint32_t *)FR)[(ir&0x00F0)>>4])
318 #define DRN(ir) (((double *)FR)[(ir&0x0E00)>>9])
319 #define DRM(ir) (((double *)FR)[(ir&0x00E0)>>5])
320 #define DRNi(ir) (((uint64_t *)FR)[(ir&0x0E00)>>9])
321 #define DRMi(ir) (((uint64_t *)FR)[(ir&0x00E0)>>5])
322 #define FRNn(ir) ((ir&0x0F00)>>8)
323 #define FRMn(ir) ((ir&0x00F0)>>4)
324 #define FPULf *((float *)&sh4r.fpul)
325 #define FPULi (sh4r.fpul)
327 if( SH4_INT_PENDING() )
328 sh4_accept_interrupt();
330 pc = sh4r.pc;
331 ir = MEM_READ_WORD(pc);
332 sh4r.icount++;
334 switch( (ir&0xF000)>>12 ) {
335 case 0: /* 0000nnnnmmmmxxxx */
336 switch( ir&0x000F ) {
337 case 2:
338 switch( (ir&0x00F0)>>4 ) {
339 case 0: /* STC SR, Rn */
340 CHECKPRIV();
341 RN(ir) = sh4_read_sr();
342 break;
343 case 1: /* STC GBR, Rn */
344 RN(ir) = sh4r.gbr;
345 break;
346 case 2: /* STC VBR, Rn */
347 CHECKPRIV();
348 RN(ir) = sh4r.vbr;
349 break;
350 case 3: /* STC SSR, Rn */
351 CHECKPRIV();
352 RN(ir) = sh4r.ssr;
353 break;
354 case 4: /* STC SPC, Rn */
355 CHECKPRIV();
356 RN(ir) = sh4r.spc;
357 break;
358 case 8: case 9: case 10: case 11: case 12: case 13:
359 case 14: case 15:/* STC Rm_bank, Rn */
360 CHECKPRIV();
361 RN(ir) = RN_BANK(ir);
362 break;
363 default: UNDEF(ir);
364 }
365 break;
366 case 3:
367 switch( (ir&0x00F0)>>4 ) {
368 case 0: /* BSRF Rn */
369 CHECKDEST( pc + 4 + RN(ir) );
370 CHECKSLOTILLEGAL();
371 sh4r.in_delay_slot = 1;
372 sh4r.pr = sh4r.pc + 4;
373 sh4r.pc = sh4r.new_pc;
374 sh4r.new_pc = pc + 4 + RN(ir);
375 return TRUE;
376 case 2: /* BRAF Rn */
377 CHECKDEST( pc + 4 + RN(ir) );
378 CHECKSLOTILLEGAL();
379 sh4r.in_delay_slot = 1;
380 sh4r.pc = sh4r.new_pc;
381 sh4r.new_pc = pc + 4 + RN(ir);
382 return TRUE;
383 case 8: /* PREF [Rn] */
384 tmp = RN(ir);
385 if( (tmp & 0xFC000000) == 0xE0000000 ) {
386 /* Store queue operation */
387 int queue = (tmp&0x20)>>2;
388 int32_t *src = &sh4r.store_queue[queue];
389 uint32_t hi = (MMIO_READ( MMU, (queue == 0 ? QACR0 : QACR1) ) & 0x1C) << 24;
390 uint32_t target = tmp&0x03FFFFE0 | hi;
391 mem_copy_to_sh4( target, src, 32 );
392 // WARN( "Executed SQ%c => %08X",
393 // (queue == 0 ? '0' : '1'), target );
394 }
395 break;
396 case 9: /* OCBI [Rn] */
397 case 10:/* OCBP [Rn] */
398 case 11:/* OCBWB [Rn] */
399 /* anything? */
400 break;
401 case 12:/* MOVCA.L R0, [Rn] */
402 UNIMP(ir);
403 default: UNDEF(ir);
404 }
405 break;
406 case 4: /* MOV.B Rm, [R0 + Rn] */
407 MEM_WRITE_BYTE( R0 + RN(ir), RM(ir) );
408 break;
409 case 5: /* MOV.W Rm, [R0 + Rn] */
410 MEM_WRITE_WORD( R0 + RN(ir), RM(ir) );
411 break;
412 case 6: /* MOV.L Rm, [R0 + Rn] */
413 MEM_WRITE_LONG( R0 + RN(ir), RM(ir) );
414 break;
415 case 7: /* MUL.L Rm, Rn */
416 sh4r.mac = (sh4r.mac&0xFFFFFFFF00000000LL) |
417 (RM(ir) * RN(ir));
418 break;
419 case 8:
420 switch( (ir&0x0FF0)>>4 ) {
421 case 0: /* CLRT */
422 sh4r.t = 0;
423 break;
424 case 1: /* SETT */
425 sh4r.t = 1;
426 break;
427 case 2: /* CLRMAC */
428 sh4r.mac = 0;
429 break;
430 case 3: /* LDTLB */
431 break;
432 case 4: /* CLRS */
433 sh4r.s = 0;
434 break;
435 case 5: /* SETS */
436 sh4r.s = 1;
437 break;
438 default: UNDEF(ir);
439 }
440 break;
441 case 9:
442 if( (ir&0x00F0) == 0x20 ) /* MOVT Rn */
443 RN(ir) = sh4r.t;
444 else if( ir == 0x0019 ) /* DIV0U */
445 sh4r.m = sh4r.q = sh4r.t = 0;
446 else if( ir == 0x0009 )
447 /* NOP */;
448 else UNDEF(ir);
449 break;
450 case 10:
451 switch( (ir&0x00F0) >> 4 ) {
452 case 0: /* STS MACH, Rn */
453 RN(ir) = sh4r.mac >> 32;
454 break;
455 case 1: /* STS MACL, Rn */
456 RN(ir) = (uint32_t)sh4r.mac;
457 break;
458 case 2: /* STS PR, Rn */
459 RN(ir) = sh4r.pr;
460 break;
461 case 3: /* STC SGR, Rn */
462 CHECKPRIV();
463 RN(ir) = sh4r.sgr;
464 break;
465 case 5:/* STS FPUL, Rn */
466 RN(ir) = sh4r.fpul;
467 break;
468 case 6: /* STS FPSCR, Rn */
469 RN(ir) = sh4r.fpscr;
470 break;
471 case 15:/* STC DBR, Rn */
472 CHECKPRIV();
473 RN(ir) = sh4r.dbr;
474 break;
475 default: UNDEF(ir);
476 }
477 break;
478 case 11:
479 switch( (ir&0x0FF0)>>4 ) {
480 case 0: /* RTS */
481 CHECKDEST( sh4r.pr );
482 CHECKSLOTILLEGAL();
483 sh4r.in_delay_slot = 1;
484 sh4r.pc = sh4r.new_pc;
485 sh4r.new_pc = sh4r.pr;
486 return TRUE;
487 case 1: /* SLEEP */
488 if( MMIO_READ( CPG, STBCR ) & 0x80 ) {
489 sh4r.sh4_state = SH4_STATE_STANDBY;
490 } else {
491 sh4r.sh4_state = SH4_STATE_SLEEP;
492 }
493 return FALSE; /* Halt CPU */
494 case 2: /* RTE */
495 CHECKPRIV();
496 CHECKDEST( sh4r.spc );
497 CHECKSLOTILLEGAL();
498 sh4r.in_delay_slot = 1;
499 sh4r.pc = sh4r.new_pc;
500 sh4r.new_pc = sh4r.spc;
501 sh4_load_sr( sh4r.ssr );
502 return TRUE;
503 default:UNDEF(ir);
504 }
505 break;
506 case 12:/* MOV.B [R0+R%d], R%d */
507 RN(ir) = MEM_READ_BYTE( R0 + RM(ir) );
508 break;
509 case 13:/* MOV.W [R0+R%d], R%d */
510 RN(ir) = MEM_READ_WORD( R0 + RM(ir) );
511 break;
512 case 14:/* MOV.L [R0+R%d], R%d */
513 RN(ir) = MEM_READ_LONG( R0 + RM(ir) );
514 break;
515 case 15:/* MAC.L [Rm++], [Rn++] */
516 tmpl = ( SIGNEXT32(MEM_READ_LONG(RM(ir))) *
517 SIGNEXT32(MEM_READ_LONG(RN(ir))) );
518 if( sh4r.s ) {
519 /* 48-bit Saturation. Yuch */
520 tmpl += SIGNEXT48(sh4r.mac);
521 if( tmpl < 0xFFFF800000000000LL )
522 tmpl = 0xFFFF800000000000LL;
523 else if( tmpl > 0x00007FFFFFFFFFFFLL )
524 tmpl = 0x00007FFFFFFFFFFFLL;
525 sh4r.mac = (sh4r.mac&0xFFFF000000000000LL) |
526 (tmpl&0x0000FFFFFFFFFFFFLL);
527 } else sh4r.mac = tmpl;
529 RM(ir) += 4;
530 RN(ir) += 4;
532 break;
533 default: UNDEF(ir);
534 }
535 break;
536 case 1: /* 0001nnnnmmmmdddd */
537 /* MOV.L Rm, [Rn + disp4*4] */
538 MEM_WRITE_LONG( RN(ir) + (DISP4(ir)<<2), RM(ir) );
539 break;
540 case 2: /* 0010nnnnmmmmxxxx */
541 switch( ir&0x000F ) {
542 case 0: /* MOV.B Rm, [Rn] */
543 MEM_WRITE_BYTE( RN(ir), RM(ir) );
544 break;
545 case 1: /* MOV.W Rm, [Rn] */
546 MEM_WRITE_WORD( RN(ir), RM(ir) );
547 break;
548 case 2: /* MOV.L Rm, [Rn] */
549 MEM_WRITE_LONG( RN(ir), RM(ir) );
550 break;
551 case 3: UNDEF(ir);
552 break;
553 case 4: /* MOV.B Rm, [--Rn] */
554 RN(ir) --;
555 MEM_WRITE_BYTE( RN(ir), RM(ir) );
556 break;
557 case 5: /* MOV.W Rm, [--Rn] */
558 RN(ir) -= 2;
559 MEM_WRITE_WORD( RN(ir), RM(ir) );
560 break;
561 case 6: /* MOV.L Rm, [--Rn] */
562 RN(ir) -= 4;
563 MEM_WRITE_LONG( RN(ir), RM(ir) );
564 break;
565 case 7: /* DIV0S Rm, Rn */
566 sh4r.q = RN(ir)>>31;
567 sh4r.m = RM(ir)>>31;
568 sh4r.t = sh4r.q ^ sh4r.m;
569 break;
570 case 8: /* TST Rm, Rn */
571 sh4r.t = (RN(ir)&RM(ir) ? 0 : 1);
572 break;
573 case 9: /* AND Rm, Rn */
574 RN(ir) &= RM(ir);
575 break;
576 case 10:/* XOR Rm, Rn */
577 RN(ir) ^= RM(ir);
578 break;
579 case 11:/* OR Rm, Rn */
580 RN(ir) |= RM(ir);
581 break;
582 case 12:/* CMP/STR Rm, Rn */
583 /* set T = 1 if any byte in RM & RN is the same */
584 tmp = RM(ir) ^ RN(ir);
585 sh4r.t = ((tmp&0x000000FF)==0 || (tmp&0x0000FF00)==0 ||
586 (tmp&0x00FF0000)==0 || (tmp&0xFF000000)==0)?1:0;
587 break;
588 case 13:/* XTRCT Rm, Rn */
589 RN(ir) = (RN(ir)>>16) | (RM(ir)<<16);
590 break;
591 case 14:/* MULU.W Rm, Rn */
592 sh4r.mac = (sh4r.mac&0xFFFFFFFF00000000LL) |
593 (uint32_t)((RM(ir)&0xFFFF) * (RN(ir)&0xFFFF));
594 break;
595 case 15:/* MULS.W Rm, Rn */
596 sh4r.mac = (sh4r.mac&0xFFFFFFFF00000000LL) |
597 (uint32_t)(SIGNEXT32(RM(ir)&0xFFFF) * SIGNEXT32(RN(ir)&0xFFFF));
598 break;
599 }
600 break;
601 case 3: /* 0011nnnnmmmmxxxx */
602 switch( ir&0x000F ) {
603 case 0: /* CMP/EQ Rm, Rn */
604 sh4r.t = ( RM(ir) == RN(ir) ? 1 : 0 );
605 break;
606 case 2: /* CMP/HS Rm, Rn */
607 sh4r.t = ( RN(ir) >= RM(ir) ? 1 : 0 );
608 break;
609 case 3: /* CMP/GE Rm, Rn */
610 sh4r.t = ( ((int32_t)RN(ir)) >= ((int32_t)RM(ir)) ? 1 : 0 );
611 break;
612 case 4: { /* DIV1 Rm, Rn */
613 /* This is just from the sh4p manual with some
614 * simplifications (someone want to check it's correct? :)
615 * Why they couldn't just provide a real DIV instruction...
616 * Please oh please let the translator batch these things
617 * up into a single DIV... */
618 uint32_t tmp0, tmp1, tmp2, dir;
620 dir = sh4r.q ^ sh4r.m;
621 sh4r.q = (RN(ir) >> 31);
622 tmp2 = RM(ir);
623 RN(ir) = (RN(ir) << 1) | sh4r.t;
624 tmp0 = RN(ir);
625 if( dir ) {
626 RN(ir) += tmp2;
627 tmp1 = (RN(ir)<tmp0 ? 1 : 0 );
628 } else {
629 RN(ir) -= tmp2;
630 tmp1 = (RN(ir)>tmp0 ? 1 : 0 );
631 }
632 sh4r.q ^= sh4r.m ^ tmp1;
633 sh4r.t = ( sh4r.q == sh4r.m ? 1 : 0 );
634 break; }
635 case 5: /* DMULU.L Rm, Rn */
636 sh4r.mac = ((uint64_t)RM(ir)) * ((uint64_t)RN(ir));
637 break;
638 case 6: /* CMP/HI Rm, Rn */
639 sh4r.t = ( RN(ir) > RM(ir) ? 1 : 0 );
640 break;
641 case 7: /* CMP/GT Rm, Rn */
642 sh4r.t = ( ((int32_t)RN(ir)) > ((int32_t)RM(ir)) ? 1 : 0 );
643 break;
644 case 8: /* SUB Rm, Rn */
645 RN(ir) -= RM(ir);
646 break;
647 case 10:/* SUBC Rm, Rn */
648 tmp = RN(ir);
649 RN(ir) = RN(ir) - RM(ir) - sh4r.t;
650 sh4r.t = (RN(ir) > tmp || (RN(ir) == tmp && sh4r.t == 1));
651 break;
652 case 11:/* SUBV Rm, Rn */
653 UNIMP(ir);
654 break;
655 case 12:/* ADD Rm, Rn */
656 RN(ir) += RM(ir);
657 break;
658 case 13:/* DMULS.L Rm, Rn */
659 sh4r.mac = SIGNEXT32(RM(ir)) * SIGNEXT32(RN(ir));
660 break;
661 case 14:/* ADDC Rm, Rn */
662 tmp = RN(ir);
663 RN(ir) += RM(ir) + sh4r.t;
664 sh4r.t = ( RN(ir) < tmp || (RN(ir) == tmp && sh4r.t != 0) ? 1 : 0 );
665 break;
666 case 15:/* ADDV Rm, Rn */
667 UNIMP(ir);
668 break;
669 default: UNDEF(ir);
670 }
671 break;
672 case 4: /* 0100nnnnxxxxxxxx */
673 switch( ir&0x00FF ) {
674 case 0x00: /* SHLL Rn */
675 sh4r.t = RN(ir) >> 31;
676 RN(ir) <<= 1;
677 break;
678 case 0x01: /* SHLR Rn */
679 sh4r.t = RN(ir) & 0x00000001;
680 RN(ir) >>= 1;
681 break;
682 case 0x02: /* STS.L MACH, [--Rn] */
683 RN(ir) -= 4;
684 MEM_WRITE_LONG( RN(ir), (sh4r.mac>>32) );
685 break;
686 case 0x03: /* STC.L SR, [--Rn] */
687 CHECKPRIV();
688 RN(ir) -= 4;
689 MEM_WRITE_LONG( RN(ir), sh4_read_sr() );
690 break;
691 case 0x04: /* ROTL Rn */
692 sh4r.t = RN(ir) >> 31;
693 RN(ir) <<= 1;
694 RN(ir) |= sh4r.t;
695 break;
696 case 0x05: /* ROTR Rn */
697 sh4r.t = RN(ir) & 0x00000001;
698 RN(ir) >>= 1;
699 RN(ir) |= (sh4r.t << 31);
700 break;
701 case 0x06: /* LDS.L [Rn++], MACH */
702 sh4r.mac = (sh4r.mac & 0x00000000FFFFFFFF) |
703 (((uint64_t)MEM_READ_LONG(RN(ir)))<<32);
704 RN(ir) += 4;
705 break;
706 case 0x07: /* LDC.L [Rn++], SR */
707 CHECKPRIV();
708 sh4_load_sr( MEM_READ_LONG(RN(ir)) );
709 RN(ir) +=4;
710 break;
711 case 0x08: /* SHLL2 Rn */
712 RN(ir) <<= 2;
713 break;
714 case 0x09: /* SHLR2 Rn */
715 RN(ir) >>= 2;
716 break;
717 case 0x0A: /* LDS Rn, MACH */
718 sh4r.mac = (sh4r.mac & 0x00000000FFFFFFFF) |
719 (((uint64_t)RN(ir))<<32);
720 break;
721 case 0x0B: /* JSR [Rn] */
722 CHECKDEST( RN(ir) );
723 CHECKSLOTILLEGAL();
724 sh4r.in_delay_slot = 1;
725 sh4r.pc = sh4r.new_pc;
726 sh4r.new_pc = RN(ir);
727 sh4r.pr = pc + 4;
728 return TRUE;
729 case 0x0E: /* LDC Rn, SR */
730 CHECKPRIV();
731 sh4_load_sr( RN(ir) );
732 break;
733 case 0x10: /* DT Rn */
734 RN(ir) --;
735 sh4r.t = ( RN(ir) == 0 ? 1 : 0 );
736 break;
737 case 0x11: /* CMP/PZ Rn */
738 sh4r.t = ( ((int32_t)RN(ir)) >= 0 ? 1 : 0 );
739 break;
740 case 0x12: /* STS.L MACL, [--Rn] */
741 RN(ir) -= 4;
742 MEM_WRITE_LONG( RN(ir), (uint32_t)sh4r.mac );
743 break;
744 case 0x13: /* STC.L GBR, [--Rn] */
745 RN(ir) -= 4;
746 MEM_WRITE_LONG( RN(ir), sh4r.gbr );
747 break;
748 case 0x15: /* CMP/PL Rn */
749 sh4r.t = ( ((int32_t)RN(ir)) > 0 ? 1 : 0 );
750 break;
751 case 0x16: /* LDS.L [Rn++], MACL */
752 sh4r.mac = (sh4r.mac & 0xFFFFFFFF00000000LL) |
753 (uint64_t)((uint32_t)MEM_READ_LONG(RN(ir)));
754 RN(ir) += 4;
755 break;
756 case 0x17: /* LDC.L [Rn++], GBR */
757 sh4r.gbr = MEM_READ_LONG(RN(ir));
758 RN(ir) +=4;
759 break;
760 case 0x18: /* SHLL8 Rn */
761 RN(ir) <<= 8;
762 break;
763 case 0x19: /* SHLR8 Rn */
764 RN(ir) >>= 8;
765 break;
766 case 0x1A: /* LDS Rn, MACL */
767 sh4r.mac = (sh4r.mac & 0xFFFFFFFF00000000LL) |
768 (uint64_t)((uint32_t)(RN(ir)));
769 break;
770 case 0x1B: /* TAS.B [Rn] */
771 tmp = MEM_READ_BYTE( RN(ir) );
772 sh4r.t = ( tmp == 0 ? 1 : 0 );
773 MEM_WRITE_BYTE( RN(ir), tmp | 0x80 );
774 break;
775 case 0x1E: /* LDC Rn, GBR */
776 sh4r.gbr = RN(ir);
777 break;
778 case 0x20: /* SHAL Rn */
779 sh4r.t = RN(ir) >> 31;
780 RN(ir) <<= 1;
781 break;
782 case 0x21: /* SHAR Rn */
783 sh4r.t = RN(ir) & 0x00000001;
784 RN(ir) = ((int32_t)RN(ir)) >> 1;
785 break;
786 case 0x22: /* STS.L PR, [--Rn] */
787 RN(ir) -= 4;
788 MEM_WRITE_LONG( RN(ir), sh4r.pr );
789 break;
790 case 0x23: /* STC.L VBR, [--Rn] */
791 CHECKPRIV();
792 RN(ir) -= 4;
793 MEM_WRITE_LONG( RN(ir), sh4r.vbr );
794 break;
795 case 0x24: /* ROTCL Rn */
796 tmp = RN(ir) >> 31;
797 RN(ir) <<= 1;
798 RN(ir) |= sh4r.t;
799 sh4r.t = tmp;
800 break;
801 case 0x25: /* ROTCR Rn */
802 tmp = RN(ir) & 0x00000001;
803 RN(ir) >>= 1;
804 RN(ir) |= (sh4r.t << 31 );
805 sh4r.t = tmp;
806 break;
807 case 0x26: /* LDS.L [Rn++], PR */
808 sh4r.pr = MEM_READ_LONG( RN(ir) );
809 RN(ir) += 4;
810 break;
811 case 0x27: /* LDC.L [Rn++], VBR */
812 CHECKPRIV();
813 sh4r.vbr = MEM_READ_LONG(RN(ir));
814 RN(ir) +=4;
815 break;
816 case 0x28: /* SHLL16 Rn */
817 RN(ir) <<= 16;
818 break;
819 case 0x29: /* SHLR16 Rn */
820 RN(ir) >>= 16;
821 break;
822 case 0x2A: /* LDS Rn, PR */
823 sh4r.pr = RN(ir);
824 break;
825 case 0x2B: /* JMP [Rn] */
826 CHECKDEST( RN(ir) );
827 CHECKSLOTILLEGAL();
828 sh4r.in_delay_slot = 1;
829 sh4r.pc = sh4r.new_pc;
830 sh4r.new_pc = RN(ir);
831 return TRUE;
832 case 0x2E: /* LDC Rn, VBR */
833 CHECKPRIV();
834 sh4r.vbr = RN(ir);
835 break;
836 case 0x32: /* STC.L SGR, [--Rn] */
837 CHECKPRIV();
838 RN(ir) -= 4;
839 MEM_WRITE_LONG( RN(ir), sh4r.sgr );
840 break;
841 case 0x33: /* STC.L SSR, [--Rn] */
842 CHECKPRIV();
843 RN(ir) -= 4;
844 MEM_WRITE_LONG( RN(ir), sh4r.ssr );
845 break;
846 case 0x37: /* LDC.L [Rn++], SSR */
847 CHECKPRIV();
848 sh4r.ssr = MEM_READ_LONG(RN(ir));
849 RN(ir) +=4;
850 break;
851 case 0x3E: /* LDC Rn, SSR */
852 CHECKPRIV();
853 sh4r.ssr = RN(ir);
854 break;
855 case 0x43: /* STC.L SPC, [--Rn] */
856 CHECKPRIV();
857 RN(ir) -= 4;
858 MEM_WRITE_LONG( RN(ir), sh4r.spc );
859 break;
860 case 0x47: /* LDC.L [Rn++], SPC */
861 CHECKPRIV();
862 sh4r.spc = MEM_READ_LONG(RN(ir));
863 RN(ir) +=4;
864 break;
865 case 0x4E: /* LDC Rn, SPC */
866 CHECKPRIV();
867 sh4r.spc = RN(ir);
868 break;
869 case 0x52: /* STS.L FPUL, [--Rn] */
870 RN(ir) -= 4;
871 MEM_WRITE_LONG( RN(ir), sh4r.fpul );
872 break;
873 case 0x56: /* LDS.L [Rn++], FPUL */
874 sh4r.fpul = MEM_READ_LONG(RN(ir));
875 RN(ir) +=4;
876 break;
877 case 0x5A: /* LDS Rn, FPUL */
878 sh4r.fpul = RN(ir);
879 break;
880 case 0x62: /* STS.L FPSCR, [--Rn] */
881 RN(ir) -= 4;
882 MEM_WRITE_LONG( RN(ir), sh4r.fpscr );
883 break;
884 case 0x66: /* LDS.L [Rn++], FPSCR */
885 sh4r.fpscr = MEM_READ_LONG(RN(ir));
886 RN(ir) +=4;
887 break;
888 case 0x6A: /* LDS Rn, FPSCR */
889 sh4r.fpscr = RN(ir);
890 break;
891 case 0xF2: /* STC.L DBR, [--Rn] */
892 CHECKPRIV();
893 RN(ir) -= 4;
894 MEM_WRITE_LONG( RN(ir), sh4r.dbr );
895 break;
896 case 0xF6: /* LDC.L [Rn++], DBR */
897 CHECKPRIV();
898 sh4r.dbr = MEM_READ_LONG(RN(ir));
899 RN(ir) +=4;
900 break;
901 case 0xFA: /* LDC Rn, DBR */
902 CHECKPRIV();
903 sh4r.dbr = RN(ir);
904 break;
905 case 0x83: case 0x93: case 0xA3: case 0xB3: case 0xC3:
906 case 0xD3: case 0xE3: case 0xF3: /* STC.L Rn_BANK, [--Rn] */
907 CHECKPRIV();
908 RN(ir) -= 4;
909 MEM_WRITE_LONG( RN(ir), RN_BANK(ir) );
910 break;
911 case 0x87: case 0x97: case 0xA7: case 0xB7: case 0xC7:
912 case 0xD7: case 0xE7: case 0xF7: /* LDC.L [Rn++], Rn_BANK */
913 CHECKPRIV();
914 RN_BANK(ir) = MEM_READ_LONG( RN(ir) );
915 RN(ir) += 4;
916 break;
917 case 0x8E: case 0x9E: case 0xAE: case 0xBE: case 0xCE:
918 case 0xDE: case 0xEE: case 0xFE: /* LDC Rm, Rn_BANK */
919 CHECKPRIV();
920 RN_BANK(ir) = RM(ir);
921 break;
922 default:
923 if( (ir&0x000F) == 0x0F ) {
924 /* MAC.W [Rm++], [Rn++] */
925 tmp = SIGNEXT16(MEM_READ_WORD(RM(ir))) *
926 SIGNEXT16(MEM_READ_WORD(RN(ir)));
927 if( sh4r.s ) {
928 /* FIXME */
929 UNIMP(ir);
930 } else sh4r.mac += SIGNEXT32(tmp);
931 RM(ir) += 2;
932 RN(ir) += 2;
933 } else if( (ir&0x000F) == 0x0C ) {
934 /* SHAD Rm, Rn */
935 tmp = RM(ir);
936 if( (tmp & 0x80000000) == 0 ) RN(ir) <<= (tmp&0x1f);
937 else if( (tmp & 0x1F) == 0 )
938 RN(ir) = ((int32_t)RN(ir)) >> 31;
939 else
940 RN(ir) = ((int32_t)RN(ir)) >> (((~RM(ir)) & 0x1F)+1);
941 } else if( (ir&0x000F) == 0x0D ) {
942 /* SHLD Rm, Rn */
943 tmp = RM(ir);
944 if( (tmp & 0x80000000) == 0 ) RN(ir) <<= (tmp&0x1f);
945 else if( (tmp & 0x1F) == 0 ) RN(ir) = 0;
946 else RN(ir) >>= (((~tmp) & 0x1F)+1);
947 } else UNDEF(ir);
948 }
949 break;
950 case 5: /* 0101nnnnmmmmdddd */
951 /* MOV.L [Rm + disp4*4], Rn */
952 RN(ir) = MEM_READ_LONG( RM(ir) + (DISP4(ir)<<2) );
953 break;
954 case 6: /* 0110xxxxxxxxxxxx */
955 switch( ir&0x000f ) {
956 case 0: /* MOV.B [Rm], Rn */
957 RN(ir) = MEM_READ_BYTE( RM(ir) );
958 break;
959 case 1: /* MOV.W [Rm], Rn */
960 RN(ir) = MEM_READ_WORD( RM(ir) );
961 break;
962 case 2: /* MOV.L [Rm], Rn */
963 RN(ir) = MEM_READ_LONG( RM(ir) );
964 break;
965 case 3: /* MOV Rm, Rn */
966 RN(ir) = RM(ir);
967 break;
968 case 4: /* MOV.B [Rm++], Rn */
969 RN(ir) = MEM_READ_BYTE( RM(ir) );
970 RM(ir) ++;
971 break;
972 case 5: /* MOV.W [Rm++], Rn */
973 RN(ir) = MEM_READ_WORD( RM(ir) );
974 RM(ir) += 2;
975 break;
976 case 6: /* MOV.L [Rm++], Rn */
977 RN(ir) = MEM_READ_LONG( RM(ir) );
978 RM(ir) += 4;
979 break;
980 case 7: /* NOT Rm, Rn */
981 RN(ir) = ~RM(ir);
982 break;
983 case 8: /* SWAP.B Rm, Rn */
984 RN(ir) = (RM(ir)&0xFFFF0000) | ((RM(ir)&0x0000FF00)>>8) |
985 ((RM(ir)&0x000000FF)<<8);
986 break;
987 case 9: /* SWAP.W Rm, Rn */
988 RN(ir) = (RM(ir)>>16) | (RM(ir)<<16);
989 break;
990 case 10:/* NEGC Rm, Rn */
991 tmp = 0 - RM(ir);
992 RN(ir) = tmp - sh4r.t;
993 sh4r.t = ( 0<tmp || tmp<RN(ir) ? 1 : 0 );
994 break;
995 case 11:/* NEG Rm, Rn */
996 RN(ir) = 0 - RM(ir);
997 break;
998 case 12:/* EXTU.B Rm, Rn */
999 RN(ir) = RM(ir)&0x000000FF;
1000 break;
1001 case 13:/* EXTU.W Rm, Rn */
1002 RN(ir) = RM(ir)&0x0000FFFF;
1003 break;
1004 case 14:/* EXTS.B Rm, Rn */
1005 RN(ir) = SIGNEXT8( RM(ir)&0x000000FF );
1006 break;
1007 case 15:/* EXTS.W Rm, Rn */
1008 RN(ir) = SIGNEXT16( RM(ir)&0x0000FFFF );
1009 break;
1010 }
1011 break;
1012 case 7: /* 0111nnnniiiiiiii */
1013 /* ADD imm8, Rn */
1014 RN(ir) += IMM8(ir);
1015 break;
1016 case 8: /* 1000xxxxxxxxxxxx */
1017 switch( (ir&0x0F00) >> 8 ) {
1018 case 0: /* MOV.B R0, [Rm + disp4] */
1019 MEM_WRITE_BYTE( RM(ir) + DISP4(ir), R0 );
1020 break;
1021 case 1: /* MOV.W R0, [Rm + disp4*2] */
1022 MEM_WRITE_WORD( RM(ir) + (DISP4(ir)<<1), R0 );
1023 break;
1024 case 4: /* MOV.B [Rm + disp4], R0 */
1025 R0 = MEM_READ_BYTE( RM(ir) + DISP4(ir) );
1026 break;
1027 case 5: /* MOV.W [Rm + disp4*2], R0 */
1028 R0 = MEM_READ_WORD( RM(ir) + (DISP4(ir)<<1) );
1029 break;
1030 case 8: /* CMP/EQ imm, R0 */
1031 sh4r.t = ( R0 == IMM8(ir) ? 1 : 0 );
1032 break;
1033 case 9: /* BT disp8 */
1034 CHECKSLOTILLEGAL()
1035 if( sh4r.t ) {
1036 CHECKDEST( sh4r.pc + (PCDISP8(ir)<<1) + 4 )
1037 sh4r.pc += (PCDISP8(ir)<<1) + 4;
1038 sh4r.new_pc = sh4r.pc + 2;
1039 return TRUE;
1040 }
1041 break;
1042 case 11:/* BF disp8 */
1043 CHECKSLOTILLEGAL()
1044 if( !sh4r.t ) {
1045 CHECKDEST( sh4r.pc + (PCDISP8(ir)<<1) + 4 )
1046 sh4r.pc += (PCDISP8(ir)<<1) + 4;
1047 sh4r.new_pc = sh4r.pc + 2;
1048 return TRUE;
1049 }
1050 break;
1051 case 13:/* BT/S disp8 */
1052 CHECKSLOTILLEGAL()
1053 if( sh4r.t ) {
1054 CHECKDEST( sh4r.pc + (PCDISP8(ir)<<1) + 4 )
1055 sh4r.in_delay_slot = 1;
1056 sh4r.pc = sh4r.new_pc;
1057 sh4r.new_pc = pc + (PCDISP8(ir)<<1) + 4;
1058 sh4r.in_delay_slot = 1;
1059 return TRUE;
1060 }
1061 break;
1062 case 15:/* BF/S disp8 */
1063 CHECKSLOTILLEGAL()
1064 if( !sh4r.t ) {
1065 CHECKDEST( sh4r.pc + (PCDISP8(ir)<<1) + 4 )
1066 sh4r.in_delay_slot = 1;
1067 sh4r.pc = sh4r.new_pc;
1068 sh4r.new_pc = pc + (PCDISP8(ir)<<1) + 4;
1069 return TRUE;
1070 }
1071 break;
1072 default: UNDEF(ir);
1073 }
1074 break;
1075 case 9: /* 1001xxxxxxxxxxxx */
1076 /* MOV.W [disp8*2 + pc + 4], Rn */
1077 RN(ir) = MEM_READ_WORD( pc + 4 + (DISP8(ir)<<1) );
1078 break;
1079 case 10:/* 1010dddddddddddd */
1080 /* BRA disp12 */
1081 CHECKDEST( sh4r.pc + (DISP12(ir)<<1) + 4 )
1082 CHECKSLOTILLEGAL()
1083 sh4r.in_delay_slot = 1;
1084 sh4r.pc = sh4r.new_pc;
1085 sh4r.new_pc = pc + 4 + (DISP12(ir)<<1);
1086 return TRUE;
1087 case 11:/* 1011dddddddddddd */
1088 /* BSR disp12 */
1089 CHECKDEST( sh4r.pc + (DISP12(ir)<<1) + 4 )
1090 CHECKSLOTILLEGAL()
1091 sh4r.in_delay_slot = 1;
1092 sh4r.pr = pc + 4;
1093 sh4r.pc = sh4r.new_pc;
1094 sh4r.new_pc = pc + 4 + (DISP12(ir)<<1);
1095 return TRUE;
1096 case 12:/* 1100xxxxdddddddd */
1097 switch( (ir&0x0F00)>>8 ) {
1098 case 0: /* MOV.B R0, [GBR + disp8] */
1099 MEM_WRITE_BYTE( sh4r.gbr + DISP8(ir), R0 );
1100 break;
1101 case 1: /* MOV.W R0, [GBR + disp8*2] */
1102 MEM_WRITE_WORD( sh4r.gbr + (DISP8(ir)<<1), R0 );
1103 break;
1104 case 2: /*MOV.L R0, [GBR + disp8*4] */
1105 MEM_WRITE_LONG( sh4r.gbr + (DISP8(ir)<<2), R0 );
1106 break;
1107 case 3: /* TRAPA imm8 */
1108 CHECKSLOTILLEGAL()
1109 sh4r.in_delay_slot = 1;
1110 MMIO_WRITE( MMU, TRA, UIMM8(ir) );
1111 sh4r.pc = sh4r.new_pc; /* RAISE ends the instruction */
1112 sh4r.new_pc += 2;
1113 RAISE( EXC_TRAP, EXV_TRAP );
1114 break;
1115 case 4: /* MOV.B [GBR + disp8], R0 */
1116 R0 = MEM_READ_BYTE( sh4r.gbr + DISP8(ir) );
1117 break;
1118 case 5: /* MOV.W [GBR + disp8*2], R0 */
1119 R0 = MEM_READ_WORD( sh4r.gbr + (DISP8(ir)<<1) );
1120 break;
1121 case 6: /* MOV.L [GBR + disp8*4], R0 */
1122 R0 = MEM_READ_LONG( sh4r.gbr + (DISP8(ir)<<2) );
1123 break;
1124 case 7: /* MOVA disp8 + pc&~3 + 4, R0 */
1125 R0 = (pc&0xFFFFFFFC) + (DISP8(ir)<<2) + 4;
1126 break;
1127 case 8: /* TST imm8, R0 */
1128 sh4r.t = (R0 & UIMM8(ir) ? 0 : 1);
1129 break;
1130 case 9: /* AND imm8, R0 */
1131 R0 &= UIMM8(ir);
1132 break;
1133 case 10:/* XOR imm8, R0 */
1134 R0 ^= UIMM8(ir);
1135 break;
1136 case 11:/* OR imm8, R0 */
1137 R0 |= UIMM8(ir);
1138 break;
1139 case 12:/* TST.B imm8, [R0+GBR] */
1140 sh4r.t = ( MEM_READ_BYTE(R0 + sh4r.gbr) & UIMM8(ir) ? 0 : 1 );
1141 break;
1142 case 13:/* AND.B imm8, [R0+GBR] */
1143 MEM_WRITE_BYTE( R0 + sh4r.gbr,
1144 UIMM8(ir) & MEM_READ_BYTE(R0 + sh4r.gbr) );
1145 break;
1146 case 14:/* XOR.B imm8, [R0+GBR] */
1147 MEM_WRITE_BYTE( R0 + sh4r.gbr,
1148 UIMM8(ir) ^ MEM_READ_BYTE(R0 + sh4r.gbr) );
1149 break;
1150 case 15:/* OR.B imm8, [R0+GBR] */
1151 MEM_WRITE_BYTE( R0 + sh4r.gbr,
1152 UIMM8(ir) | MEM_READ_BYTE(R0 + sh4r.gbr) );
1153 break;
1154 }
1155 break;
1156 case 13:/* 1101nnnndddddddd */
1157 /* MOV.L [disp8*4 + pc&~3 + 4], Rn */
1158 RN(ir) = MEM_READ_LONG( (pc&0xFFFFFFFC) + (DISP8(ir)<<2) + 4 );
1159 break;
1160 case 14:/* 1110nnnniiiiiiii */
1161 /* MOV imm8, Rn */
1162 RN(ir) = IMM8(ir);
1163 break;
1164 case 15:/* 1111xxxxxxxxxxxx */
1165 CHECKFPUEN();
1166 switch( ir&0x000F ) {
1167 case 0: /* FADD FRm, FRn */
1168 FRN(ir) += FRM(ir);
1169 break;
1170 case 1: /* FSUB FRm, FRn */
1171 FRN(ir) -= FRM(ir);
1172 break;
1173 case 2: /* FMUL FRm, FRn */
1174 FRN(ir) = FRN(ir) * FRM(ir);
1175 break;
1176 case 3: /* FDIV FRm, FRn */
1177 FRN(ir) = FRN(ir) / FRM(ir);
1178 break;
1179 case 4: /* FCMP/EQ FRm, FRn */
1180 sh4r.t = ( FRN(ir) == FRM(ir) ? 1 : 0 );
1181 break;
1182 case 5: /* FCMP/GT FRm, FRn */
1183 sh4r.t = ( FRN(ir) > FRM(ir) ? 1 : 0 );
1184 break;
1185 case 6: /* FMOV.S [Rm+R0], FRn */
1186 MEM_FP_READ( RM(ir) + R0, FRNn(ir) );
1187 break;
1188 case 7: /* FMOV.S FRm, [Rn+R0] */
1189 MEM_FP_WRITE( RN(ir) + R0, FRMn(ir) );
1190 break;
1191 case 8: /* FMOV.S [Rm], FRn */
1192 MEM_FP_READ( RM(ir), FRNn(ir) );
1193 break;
1194 case 9: /* FMOV.S [Rm++], FRn */
1195 MEM_FP_READ( RM(ir), FRNn(ir) );
1196 RM(ir) += FP_WIDTH;
1197 break;
1198 case 10:/* FMOV.S FRm, [Rn] */
1199 MEM_FP_WRITE( RN(ir), FRMn(ir) );
1200 break;
1201 case 11:/* FMOV.S FRm, [--Rn] */
1202 RN(ir) -= FP_WIDTH;
1203 MEM_FP_WRITE( RN(ir), FRMn(ir) );
1204 break;
1205 case 12:/* FMOV FRm, FRn */
1206 if( IS_FPU_DOUBLESIZE() ) {
1207 DRN(ir) = DRM(ir);
1208 } else {
1209 FRN(ir) = FRM(ir);
1210 }
1211 break;
1212 case 13:
1213 switch( (ir&0x00F0) >> 4 ) {
1214 case 0: /* FSTS FPUL, FRn */
1215 FRN(ir) = FPULf;
1216 break;
1217 case 1: /* FLDS FRn, FPUL */
1218 FPULf = FRN(ir);
1219 break;
1220 case 2: /* FLOAT FPUL, FRn */
1221 FRN(ir) = (float)FPULi;
1222 break;
1223 case 3: /* FTRC FRn, FPUL */
1224 FPULi = (uint32_t)FRN(ir);
1225 /* FIXME: is this sufficient? */
1226 break;
1227 case 4: /* FNEG FRn */
1228 FRN(ir) = -FRN(ir);
1229 break;
1230 case 5: /* FABS FRn */
1231 FRN(ir) = fabsf(FRN(ir));
1232 break;
1233 case 6: /* FSQRT FRn */
1234 FRN(ir) = sqrtf(FRN(ir));
1235 break;
1236 case 7: /* FSRRA FRn */
1237 FRN(ir) = 1.0/sqrtf(FRN(ir));
1238 break;
1239 case 8: /* FLDI0 FRn */
1240 FRN(ir) = 0.0;
1241 break;
1242 case 9: /* FLDI1 FRn */
1243 FRN(ir) = 1.0;
1244 break;
1245 case 10: /* FCNVSD FPUL, DRn */
1246 if( IS_FPU_DOUBLEPREC() )
1247 DRN(ir) = (double)FPULf;
1248 else UNDEF(ir);
1249 break;
1250 case 11: /* FCNVDS DRn, FPUL */
1251 if( IS_FPU_DOUBLEPREC() )
1252 FPULf = (float)DRN(ir);
1253 else UNDEF(ir);
1254 break;
1255 case 14:/* FIPR FVm, FVn */
1256 /* FIXME: This is not going to be entirely accurate
1257 * as the SH4 instruction is less precise. Also
1258 * need to check for 0s and infinities.
1259 */
1260 {
1261 float *fr_bank = FR;
1262 int tmp2 = FVN(ir);
1263 tmp = FVM(ir);
1264 fr_bank[tmp2+3] = fr_bank[tmp]*fr_bank[tmp2] +
1265 fr_bank[tmp+1]*fr_bank[tmp2+1] +
1266 fr_bank[tmp+2]*fr_bank[tmp2+2] +
1267 fr_bank[tmp+3]*fr_bank[tmp2+3];
1268 break;
1269 }
1270 case 15:
1271 if( (ir&0x0300) == 0x0100 ) { /* FTRV XMTRX,FVn */
1272 float *fvout = FR+FVN(ir);
1273 float *xm = XF;
1274 float fv[4] = { fvout[0], fvout[1], fvout[2], fvout[3] };
1275 fvout[0] = xm[0] * fv[0] + xm[4]*fv[1] +
1276 xm[8]*fv[2] + xm[12]*fv[3];
1277 fvout[1] = xm[1] * fv[0] + xm[5]*fv[1] +
1278 xm[9]*fv[2] + xm[13]*fv[3];
1279 fvout[2] = xm[2] * fv[0] + xm[6]*fv[1] +
1280 xm[10]*fv[2] + xm[14]*fv[3];
1281 fvout[3] = xm[3] * fv[0] + xm[7]*fv[1] +
1282 xm[11]*fv[2] + xm[15]*fv[3];
1283 break;
1284 }
1285 else if( (ir&0x0100) == 0 ) { /* FSCA FPUL, DRn */
1286 float angle = (((float)(short)(FPULi>>16)) +
1287 ((float)(FPULi&16)/65536.0)) *
1288 2 * M_PI;
1289 int reg = FRNn(ir);
1290 FR[reg] = sinf(angle);
1291 FR[reg+1] = cosf(angle);
1292 break;
1293 }
1294 else if( ir == 0xFBFD ) {
1295 /* FRCHG */
1296 sh4r.fpscr ^= FPSCR_FR;
1297 break;
1298 }
1299 else if( ir == 0xF3FD ) {
1300 /* FSCHG */
1301 sh4r.fpscr ^= FPSCR_SZ;
1302 break;
1303 }
1304 default: UNDEF(ir);
1305 }
1306 break;
1307 case 14:/* FMAC FR0, FRm, FRn */
1308 FRN(ir) += FRM(ir)*FR0;
1309 break;
1310 default: UNDEF(ir);
1311 }
1312 break;
1313 }
1314 sh4r.pc = sh4r.new_pc;
1315 sh4r.new_pc += 2;
1316 sh4r.in_delay_slot = 0;
1317 }
.