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target-mips: CP0 Random register improvements
[qemu/mini2440/sniper_sniper_test.git] / target-m68k / translate.c
blob0546fca79e0de0faf0e870ca3961653b1c47b59c
1 /*
2 * m68k translation
3 *
4 * Copyright (c) 2005-2007 CodeSourcery
5 * Written by Paul Brook
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
20 */
21 #include <stdarg.h>
22 #include <stdlib.h>
23 #include <stdio.h>
24 #include <string.h>
25 #include <inttypes.h>
26 #include <assert.h>
27
28 #include "config.h"
29 #include "cpu.h"
30 #include "exec-all.h"
31 #include "disas.h"
32 #include "tcg-op.h"
33 #include "qemu-log.h"
34
35 #include "helpers.h"
36 #define GEN_HELPER 1
37 #include "helpers.h"
38
39 //#define DEBUG_DISPATCH 1
40
41 /* Fake floating point. */
42 #define tcg_gen_mov_f64 tcg_gen_mov_i64
43 #define tcg_gen_qemu_ldf64 tcg_gen_qemu_ld64
44 #define tcg_gen_qemu_stf64 tcg_gen_qemu_st64
45
46 #define DEFO32(name, offset) static TCGv QREG_##name;
47 #define DEFO64(name, offset) static TCGv_i64 QREG_##name;
48 #define DEFF64(name, offset) static TCGv_i64 QREG_##name;
49 #include "qregs.def"
50 #undef DEFO32
51 #undef DEFO64
52 #undef DEFF64
53
54 static TCGv_ptr cpu_env;
55
56 static char cpu_reg_names[3*8*3 + 5*4];
57 static TCGv cpu_dregs[8];
58 static TCGv cpu_aregs[8];
59 static TCGv_i64 cpu_fregs[8];
60 static TCGv_i64 cpu_macc[4];
61
62 #define DREG(insn, pos) cpu_dregs[((insn) >> (pos)) & 7]
63 #define AREG(insn, pos) cpu_aregs[((insn) >> (pos)) & 7]
64 #define FREG(insn, pos) cpu_fregs[((insn) >> (pos)) & 7]
65 #define MACREG(acc) cpu_macc[acc]
66 #define QREG_SP cpu_aregs[7]
67
68 static TCGv NULL_QREG;
69 #define IS_NULL_QREG(t) (TCGV_EQUAL(t, NULL_QREG))
70 /* Used to distinguish stores from bad addressing modes. */
71 static TCGv store_dummy;
72
73 #include "gen-icount.h"
74
75 void m68k_tcg_init(void)
76 {
77 char *p;
78 int i;
79
80 #define DEFO32(name, offset) QREG_##name = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUState, offset), #name);
81 #define DEFO64(name, offset) QREG_##name = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUState, offset), #name);
82 #define DEFF64(name, offset) DEFO64(name, offset)
83 #include "qregs.def"
84 #undef DEFO32
85 #undef DEFO64
86 #undef DEFF64
87
88 cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
89
90 p = cpu_reg_names;
91 for (i = 0; i < 8; i++) {
92 sprintf(p, "D%d", i);
93 cpu_dregs[i] = tcg_global_mem_new(TCG_AREG0,
94 offsetof(CPUM68KState, dregs[i]), p);
95 p += 3;
96 sprintf(p, "A%d", i);
97 cpu_aregs[i] = tcg_global_mem_new(TCG_AREG0,
98 offsetof(CPUM68KState, aregs[i]), p);
99 p += 3;
100 sprintf(p, "F%d", i);
101 cpu_fregs[i] = tcg_global_mem_new_i64(TCG_AREG0,
102 offsetof(CPUM68KState, fregs[i]), p);
103 p += 3;
104 }
105 for (i = 0; i < 4; i++) {
106 sprintf(p, "ACC%d", i);
107 cpu_macc[i] = tcg_global_mem_new_i64(TCG_AREG0,
108 offsetof(CPUM68KState, macc[i]), p);
109 p += 5;
110 }
111
112 NULL_QREG = tcg_global_mem_new(TCG_AREG0, -4, "NULL");
113 store_dummy = tcg_global_mem_new(TCG_AREG0, -8, "NULL");
114
115 #define GEN_HELPER 2
116 #include "helpers.h"
117 }
118
119 static inline void qemu_assert(int cond, const char *msg)
120 {
121 if (!cond) {
122 fprintf (stderr, "badness: %s\n", msg);
123 abort();
124 }
125 }
126
127 /* internal defines */
128 typedef struct DisasContext {
129 CPUM68KState *env;
130 target_ulong insn_pc; /* Start of the current instruction. */
131 target_ulong pc;
132 int is_jmp;
133 int cc_op;
134 int user;
135 uint32_t fpcr;
136 struct TranslationBlock *tb;
137 int singlestep_enabled;
138 int is_mem;
139 TCGv_i64 mactmp;
140 int done_mac;
141 } DisasContext;
142
143 #define DISAS_JUMP_NEXT 4
144
145 #if defined(CONFIG_USER_ONLY)
146 #define IS_USER(s) 1
147 #else
148 #define IS_USER(s) s->user
149 #endif
150
151 /* XXX: move that elsewhere */
152 /* ??? Fix exceptions. */
153 static void *gen_throws_exception;
154 #define gen_last_qop NULL
155
156 #define OS_BYTE 0
157 #define OS_WORD 1
158 #define OS_LONG 2
159 #define OS_SINGLE 4
160 #define OS_DOUBLE 5
161
162 typedef void (*disas_proc)(DisasContext *, uint16_t);
163
164 #ifdef DEBUG_DISPATCH
165 #define DISAS_INSN(name) \
166 static void real_disas_##name (DisasContext *s, uint16_t insn); \
167 static void disas_##name (DisasContext *s, uint16_t insn) { \
168 if (logfile) fprintf(logfile, "Dispatch " #name "\n"); \
169 real_disas_##name(s, insn); } \
170 static void real_disas_##name (DisasContext *s, uint16_t insn)
171 #else
172 #define DISAS_INSN(name) \
173 static void disas_##name (DisasContext *s, uint16_t insn)
174 #endif
175
176 /* FIXME: Remove this. */
177 #define gen_im32(val) tcg_const_i32(val)
178
179 /* Generate a load from the specified address. Narrow values are
180 sign extended to full register width. */
181 static inline TCGv gen_load(DisasContext * s, int opsize, TCGv addr, int sign)
182 {
183 TCGv tmp;
184 int index = IS_USER(s);
185 s->is_mem = 1;
186 tmp = tcg_temp_new_i32();
187 switch(opsize) {
188 case OS_BYTE:
189 if (sign)
190 tcg_gen_qemu_ld8s(tmp, addr, index);
191 else
192 tcg_gen_qemu_ld8u(tmp, addr, index);
193 break;
194 case OS_WORD:
195 if (sign)
196 tcg_gen_qemu_ld16s(tmp, addr, index);
197 else
198 tcg_gen_qemu_ld16u(tmp, addr, index);
199 break;
200 case OS_LONG:
201 case OS_SINGLE:
202 tcg_gen_qemu_ld32u(tmp, addr, index);
203 break;
204 default:
205 qemu_assert(0, "bad load size");
206 }
207 gen_throws_exception = gen_last_qop;
208 return tmp;
209 }
210
211 static inline TCGv_i64 gen_load64(DisasContext * s, TCGv addr)
212 {
213 TCGv_i64 tmp;
214 int index = IS_USER(s);
215 s->is_mem = 1;
216 tmp = tcg_temp_new_i64();
217 tcg_gen_qemu_ldf64(tmp, addr, index);
218 gen_throws_exception = gen_last_qop;
219 return tmp;
220 }
221
222 /* Generate a store. */
223 static inline void gen_store(DisasContext *s, int opsize, TCGv addr, TCGv val)
224 {
225 int index = IS_USER(s);
226 s->is_mem = 1;
227 switch(opsize) {
228 case OS_BYTE:
229 tcg_gen_qemu_st8(val, addr, index);
230 break;
231 case OS_WORD:
232 tcg_gen_qemu_st16(val, addr, index);
233 break;
234 case OS_LONG:
235 case OS_SINGLE:
236 tcg_gen_qemu_st32(val, addr, index);
237 break;
238 default:
239 qemu_assert(0, "bad store size");
240 }
241 gen_throws_exception = gen_last_qop;
242 }
243
244 static inline void gen_store64(DisasContext *s, TCGv addr, TCGv_i64 val)
245 {
246 int index = IS_USER(s);
247 s->is_mem = 1;
248 tcg_gen_qemu_stf64(val, addr, index);
249 gen_throws_exception = gen_last_qop;
250 }
251
252 typedef enum {
253 EA_STORE,
254 EA_LOADU,
255 EA_LOADS
256 } ea_what;
257
258 /* Generate an unsigned load if VAL is 0 a signed load if val is -1,
259 otherwise generate a store. */
260 static TCGv gen_ldst(DisasContext *s, int opsize, TCGv addr, TCGv val,
261 ea_what what)
262 {
263 if (what == EA_STORE) {
264 gen_store(s, opsize, addr, val);
265 return store_dummy;
266 } else {
267 return gen_load(s, opsize, addr, what == EA_LOADS);
268 }
269 }
270
271 /* Read a 32-bit immediate constant. */
272 static inline uint32_t read_im32(DisasContext *s)
273 {
274 uint32_t im;
275 im = ((uint32_t)lduw_code(s->pc)) << 16;
276 s->pc += 2;
277 im |= lduw_code(s->pc);
278 s->pc += 2;
279 return im;
280 }
281
282 /* Calculate and address index. */
283 static TCGv gen_addr_index(uint16_t ext, TCGv tmp)
284 {
285 TCGv add;
286 int scale;
287
288 add = (ext & 0x8000) ? AREG(ext, 12) : DREG(ext, 12);
289 if ((ext & 0x800) == 0) {
290 tcg_gen_ext16s_i32(tmp, add);
291 add = tmp;
292 }
293 scale = (ext >> 9) & 3;
294 if (scale != 0) {
295 tcg_gen_shli_i32(tmp, add, scale);
296 add = tmp;
297 }
298 return add;
299 }
300
301 /* Handle a base + index + displacement effective addresss.
302 A NULL_QREG base means pc-relative. */
303 static TCGv gen_lea_indexed(DisasContext *s, int opsize, TCGv base)
304 {
305 uint32_t offset;
306 uint16_t ext;
307 TCGv add;
308 TCGv tmp;
309 uint32_t bd, od;
310
311 offset = s->pc;
312 ext = lduw_code(s->pc);
313 s->pc += 2;
314
315 if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX))
316 return NULL_QREG;
317
318 if (ext & 0x100) {
319 /* full extension word format */
320 if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL))
321 return NULL_QREG;
322
323 if ((ext & 0x30) > 0x10) {
324 /* base displacement */
325 if ((ext & 0x30) == 0x20) {
326 bd = (int16_t)lduw_code(s->pc);
327 s->pc += 2;
328 } else {
329 bd = read_im32(s);
330 }
331 } else {
332 bd = 0;
333 }
334 tmp = tcg_temp_new();
335 if ((ext & 0x44) == 0) {
336 /* pre-index */
337 add = gen_addr_index(ext, tmp);
338 } else {
339 add = NULL_QREG;
340 }
341 if ((ext & 0x80) == 0) {
342 /* base not suppressed */
343 if (IS_NULL_QREG(base)) {
344 base = gen_im32(offset + bd);
345 bd = 0;
346 }
347 if (!IS_NULL_QREG(add)) {
348 tcg_gen_add_i32(tmp, add, base);
349 add = tmp;
350 } else {
351 add = base;
352 }
353 }
354 if (!IS_NULL_QREG(add)) {
355 if (bd != 0) {
356 tcg_gen_addi_i32(tmp, add, bd);
357 add = tmp;
358 }
359 } else {
360 add = gen_im32(bd);
361 }
362 if ((ext & 3) != 0) {
363 /* memory indirect */
364 base = gen_load(s, OS_LONG, add, 0);
365 if ((ext & 0x44) == 4) {
366 add = gen_addr_index(ext, tmp);
367 tcg_gen_add_i32(tmp, add, base);
368 add = tmp;
369 } else {
370 add = base;
371 }
372 if ((ext & 3) > 1) {
373 /* outer displacement */
374 if ((ext & 3) == 2) {
375 od = (int16_t)lduw_code(s->pc);
376 s->pc += 2;
377 } else {
378 od = read_im32(s);
379 }
380 } else {
381 od = 0;
382 }
383 if (od != 0) {
384 tcg_gen_addi_i32(tmp, add, od);
385 add = tmp;
386 }
387 }
388 } else {
389 /* brief extension word format */
390 tmp = tcg_temp_new();
391 add = gen_addr_index(ext, tmp);
392 if (!IS_NULL_QREG(base)) {
393 tcg_gen_add_i32(tmp, add, base);
394 if ((int8_t)ext)
395 tcg_gen_addi_i32(tmp, tmp, (int8_t)ext);
396 } else {
397 tcg_gen_addi_i32(tmp, add, offset + (int8_t)ext);
398 }
399 add = tmp;
400 }
401 return add;
402 }
403
404 /* Update the CPU env CC_OP state. */
405 static inline void gen_flush_cc_op(DisasContext *s)
406 {
407 if (s->cc_op != CC_OP_DYNAMIC)
408 tcg_gen_movi_i32(QREG_CC_OP, s->cc_op);
409 }
410
411 /* Evaluate all the CC flags. */
412 static inline void gen_flush_flags(DisasContext *s)
413 {
414 if (s->cc_op == CC_OP_FLAGS)
415 return;
416 gen_flush_cc_op(s);
417 gen_helper_flush_flags(cpu_env, QREG_CC_OP);
418 s->cc_op = CC_OP_FLAGS;
419 }
420
421 static void gen_logic_cc(DisasContext *s, TCGv val)
422 {
423 tcg_gen_mov_i32(QREG_CC_DEST, val);
424 s->cc_op = CC_OP_LOGIC;
425 }
426
427 static void gen_update_cc_add(TCGv dest, TCGv src)
428 {
429 tcg_gen_mov_i32(QREG_CC_DEST, dest);
430 tcg_gen_mov_i32(QREG_CC_SRC, src);
431 }
432
433 static inline int opsize_bytes(int opsize)
434 {
435 switch (opsize) {
436 case OS_BYTE: return 1;
437 case OS_WORD: return 2;
438 case OS_LONG: return 4;
439 case OS_SINGLE: return 4;
440 case OS_DOUBLE: return 8;
441 default:
442 qemu_assert(0, "bad operand size");
443 return 0;
444 }
445 }
446
447 /* Assign value to a register. If the width is less than the register width
448 only the low part of the register is set. */
449 static void gen_partset_reg(int opsize, TCGv reg, TCGv val)
450 {
451 TCGv tmp;
452 switch (opsize) {
453 case OS_BYTE:
454 tcg_gen_andi_i32(reg, reg, 0xffffff00);
455 tmp = tcg_temp_new();
456 tcg_gen_ext8u_i32(tmp, val);
457 tcg_gen_or_i32(reg, reg, tmp);
458 break;
459 case OS_WORD:
460 tcg_gen_andi_i32(reg, reg, 0xffff0000);
461 tmp = tcg_temp_new();
462 tcg_gen_ext16u_i32(tmp, val);
463 tcg_gen_or_i32(reg, reg, tmp);
464 break;
465 case OS_LONG:
466 case OS_SINGLE:
467 tcg_gen_mov_i32(reg, val);
468 break;
469 default:
470 qemu_assert(0, "Bad operand size");
471 break;
472 }
473 }
474
475 /* Sign or zero extend a value. */
476 static inline TCGv gen_extend(TCGv val, int opsize, int sign)
477 {
478 TCGv tmp;
479
480 switch (opsize) {
481 case OS_BYTE:
482 tmp = tcg_temp_new();
483 if (sign)
484 tcg_gen_ext8s_i32(tmp, val);
485 else
486 tcg_gen_ext8u_i32(tmp, val);
487 break;
488 case OS_WORD:
489 tmp = tcg_temp_new();
490 if (sign)
491 tcg_gen_ext16s_i32(tmp, val);
492 else
493 tcg_gen_ext16u_i32(tmp, val);
494 break;
495 case OS_LONG:
496 case OS_SINGLE:
497 tmp = val;
498 break;
499 default:
500 qemu_assert(0, "Bad operand size");
501 }
502 return tmp;
503 }
504
505 /* Generate code for an "effective address". Does not adjust the base
506 register for autoincrement addressing modes. */
507 static TCGv gen_lea(DisasContext *s, uint16_t insn, int opsize)
508 {
509 TCGv reg;
510 TCGv tmp;
511 uint16_t ext;
512 uint32_t offset;
513
514 switch ((insn >> 3) & 7) {
515 case 0: /* Data register direct. */
516 case 1: /* Address register direct. */
517 return NULL_QREG;
518 case 2: /* Indirect register */
519 case 3: /* Indirect postincrement. */
520 return AREG(insn, 0);
521 case 4: /* Indirect predecrememnt. */
522 reg = AREG(insn, 0);
523 tmp = tcg_temp_new();
524 tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize));
525 return tmp;
526 case 5: /* Indirect displacement. */
527 reg = AREG(insn, 0);
528 tmp = tcg_temp_new();
529 ext = lduw_code(s->pc);
530 s->pc += 2;
531 tcg_gen_addi_i32(tmp, reg, (int16_t)ext);
532 return tmp;
533 case 6: /* Indirect index + displacement. */
534 reg = AREG(insn, 0);
535 return gen_lea_indexed(s, opsize, reg);
536 case 7: /* Other */
537 switch (insn & 7) {
538 case 0: /* Absolute short. */
539 offset = ldsw_code(s->pc);
540 s->pc += 2;
541 return gen_im32(offset);
542 case 1: /* Absolute long. */
543 offset = read_im32(s);
544 return gen_im32(offset);
545 case 2: /* pc displacement */
546 tmp = tcg_temp_new();
547 offset = s->pc;
548 offset += ldsw_code(s->pc);
549 s->pc += 2;
550 return gen_im32(offset);
551 case 3: /* pc index+displacement. */
552 return gen_lea_indexed(s, opsize, NULL_QREG);
553 case 4: /* Immediate. */
554 default:
555 return NULL_QREG;
556 }
557 }
558 /* Should never happen. */
559 return NULL_QREG;
560 }
561
562 /* Helper function for gen_ea. Reuse the computed address between the
563 for read/write operands. */
564 static inline TCGv gen_ea_once(DisasContext *s, uint16_t insn, int opsize,
565 TCGv val, TCGv *addrp, ea_what what)
566 {
567 TCGv tmp;
568
569 if (addrp && what == EA_STORE) {
570 tmp = *addrp;
571 } else {
572 tmp = gen_lea(s, insn, opsize);
573 if (IS_NULL_QREG(tmp))
574 return tmp;
575 if (addrp)
576 *addrp = tmp;
577 }
578 return gen_ldst(s, opsize, tmp, val, what);
579 }
580
581 /* Generate code to load/store a value ito/from an EA. If VAL > 0 this is
582 a write otherwise it is a read (0 == sign extend, -1 == zero extend).
583 ADDRP is non-null for readwrite operands. */
584 static TCGv gen_ea(DisasContext *s, uint16_t insn, int opsize, TCGv val,
585 TCGv *addrp, ea_what what)
586 {
587 TCGv reg;
588 TCGv result;
589 uint32_t offset;
590
591 switch ((insn >> 3) & 7) {
592 case 0: /* Data register direct. */
593 reg = DREG(insn, 0);
594 if (what == EA_STORE) {
595 gen_partset_reg(opsize, reg, val);
596 return store_dummy;
597 } else {
598 return gen_extend(reg, opsize, what == EA_LOADS);
599 }
600 case 1: /* Address register direct. */
601 reg = AREG(insn, 0);
602 if (what == EA_STORE) {
603 tcg_gen_mov_i32(reg, val);
604 return store_dummy;
605 } else {
606 return gen_extend(reg, opsize, what == EA_LOADS);
607 }
608 case 2: /* Indirect register */
609 reg = AREG(insn, 0);
610 return gen_ldst(s, opsize, reg, val, what);
611 case 3: /* Indirect postincrement. */
612 reg = AREG(insn, 0);
613 result = gen_ldst(s, opsize, reg, val, what);
614 /* ??? This is not exception safe. The instruction may still
615 fault after this point. */
616 if (what == EA_STORE || !addrp)
617 tcg_gen_addi_i32(reg, reg, opsize_bytes(opsize));
618 return result;
619 case 4: /* Indirect predecrememnt. */
620 {
621 TCGv tmp;
622 if (addrp && what == EA_STORE) {
623 tmp = *addrp;
624 } else {
625 tmp = gen_lea(s, insn, opsize);
626 if (IS_NULL_QREG(tmp))
627 return tmp;
628 if (addrp)
629 *addrp = tmp;
630 }
631 result = gen_ldst(s, opsize, tmp, val, what);
632 /* ??? This is not exception safe. The instruction may still
633 fault after this point. */
634 if (what == EA_STORE || !addrp) {
635 reg = AREG(insn, 0);
636 tcg_gen_mov_i32(reg, tmp);
637 }
638 }
639 return result;
640 case 5: /* Indirect displacement. */
641 case 6: /* Indirect index + displacement. */
642 return gen_ea_once(s, insn, opsize, val, addrp, what);
643 case 7: /* Other */
644 switch (insn & 7) {
645 case 0: /* Absolute short. */
646 case 1: /* Absolute long. */
647 case 2: /* pc displacement */
648 case 3: /* pc index+displacement. */
649 return gen_ea_once(s, insn, opsize, val, addrp, what);
650 case 4: /* Immediate. */
651 /* Sign extend values for consistency. */
652 switch (opsize) {
653 case OS_BYTE:
654 if (what == EA_LOADS)
655 offset = ldsb_code(s->pc + 1);
656 else
657 offset = ldub_code(s->pc + 1);
658 s->pc += 2;
659 break;
660 case OS_WORD:
661 if (what == EA_LOADS)
662 offset = ldsw_code(s->pc);
663 else
664 offset = lduw_code(s->pc);
665 s->pc += 2;
666 break;
667 case OS_LONG:
668 offset = read_im32(s);
669 break;
670 default:
671 qemu_assert(0, "Bad immediate operand");
672 }
673 return tcg_const_i32(offset);
674 default:
675 return NULL_QREG;
676 }
677 }
678 /* Should never happen. */
679 return NULL_QREG;
680 }
681
682 /* This generates a conditional branch, clobbering all temporaries. */
683 static void gen_jmpcc(DisasContext *s, int cond, int l1)
684 {
685 TCGv tmp;
686
687 /* TODO: Optimize compare/branch pairs rather than always flushing
688 flag state to CC_OP_FLAGS. */
689 gen_flush_flags(s);
690 switch (cond) {
691 case 0: /* T */
692 tcg_gen_br(l1);
693 break;
694 case 1: /* F */
695 break;
696 case 2: /* HI (!C && !Z) */
697 tmp = tcg_temp_new();
698 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z);
699 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
700 break;
701 case 3: /* LS (C || Z) */
702 tmp = tcg_temp_new();
703 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z);
704 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
705 break;
706 case 4: /* CC (!C) */
707 tmp = tcg_temp_new();
708 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C);
709 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
710 break;
711 case 5: /* CS (C) */
712 tmp = tcg_temp_new();
713 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C);
714 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
715 break;
716 case 6: /* NE (!Z) */
717 tmp = tcg_temp_new();
718 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z);
719 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
720 break;
721 case 7: /* EQ (Z) */
722 tmp = tcg_temp_new();
723 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z);
724 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
725 break;
726 case 8: /* VC (!V) */
727 tmp = tcg_temp_new();
728 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V);
729 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
730 break;
731 case 9: /* VS (V) */
732 tmp = tcg_temp_new();
733 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V);
734 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
735 break;
736 case 10: /* PL (!N) */
737 tmp = tcg_temp_new();
738 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
739 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
740 break;
741 case 11: /* MI (N) */
742 tmp = tcg_temp_new();
743 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
744 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
745 break;
746 case 12: /* GE (!(N ^ V)) */
747 tmp = tcg_temp_new();
748 assert(CCF_V == (CCF_N >> 2));
749 tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2);
750 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
751 tcg_gen_andi_i32(tmp, tmp, CCF_V);
752 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
753 break;
754 case 13: /* LT (N ^ V) */
755 tmp = tcg_temp_new();
756 assert(CCF_V == (CCF_N >> 2));
757 tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2);
758 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
759 tcg_gen_andi_i32(tmp, tmp, CCF_V);
760 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
761 break;
762 case 14: /* GT (!(Z || (N ^ V))) */
763 tmp = tcg_temp_new();
764 assert(CCF_V == (CCF_N >> 2));
765 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
766 tcg_gen_shri_i32(tmp, tmp, 2);
767 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
768 tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z);
769 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
770 break;
771 case 15: /* LE (Z || (N ^ V)) */
772 tmp = tcg_temp_new();
773 assert(CCF_V == (CCF_N >> 2));
774 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
775 tcg_gen_shri_i32(tmp, tmp, 2);
776 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
777 tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z);
778 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
779 break;
780 default:
781 /* Should ever happen. */
782 abort();
783 }
784 }
785
786 DISAS_INSN(scc)
787 {
788 int l1;
789 int cond;
790 TCGv reg;
791
792 l1 = gen_new_label();
793 cond = (insn >> 8) & 0xf;
794 reg = DREG(insn, 0);
795 tcg_gen_andi_i32(reg, reg, 0xffffff00);
796 /* This is safe because we modify the reg directly, with no other values
797 live. */
798 gen_jmpcc(s, cond ^ 1, l1);
799 tcg_gen_ori_i32(reg, reg, 0xff);
800 gen_set_label(l1);
801 }
802
803 /* Force a TB lookup after an instruction that changes the CPU state. */
804 static void gen_lookup_tb(DisasContext *s)
805 {
806 gen_flush_cc_op(s);
807 tcg_gen_movi_i32(QREG_PC, s->pc);
808 s->is_jmp = DISAS_UPDATE;
809 }
810
811 /* Generate a jump to an immediate address. */
812 static void gen_jmp_im(DisasContext *s, uint32_t dest)
813 {
814 gen_flush_cc_op(s);
815 tcg_gen_movi_i32(QREG_PC, dest);
816 s->is_jmp = DISAS_JUMP;
817 }
818
819 /* Generate a jump to the address in qreg DEST. */
820 static void gen_jmp(DisasContext *s, TCGv dest)
821 {
822 gen_flush_cc_op(s);
823 tcg_gen_mov_i32(QREG_PC, dest);
824 s->is_jmp = DISAS_JUMP;
825 }
826
827 static void gen_exception(DisasContext *s, uint32_t where, int nr)
828 {
829 gen_flush_cc_op(s);
830 gen_jmp_im(s, where);
831 gen_helper_raise_exception(tcg_const_i32(nr));
832 }
833
834 static inline void gen_addr_fault(DisasContext *s)
835 {
836 gen_exception(s, s->insn_pc, EXCP_ADDRESS);
837 }
838
839 #define SRC_EA(result, opsize, op_sign, addrp) do { \
840 result = gen_ea(s, insn, opsize, NULL_QREG, addrp, op_sign ? EA_LOADS : EA_LOADU); \
841 if (IS_NULL_QREG(result)) { \
842 gen_addr_fault(s); \
843 return; \
844 } \
845 } while (0)
846
847 #define DEST_EA(insn, opsize, val, addrp) do { \
848 TCGv ea_result = gen_ea(s, insn, opsize, val, addrp, EA_STORE); \
849 if (IS_NULL_QREG(ea_result)) { \
850 gen_addr_fault(s); \
851 return; \
852 } \
853 } while (0)
854
855 /* Generate a jump to an immediate address. */
856 static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
857 {
858 TranslationBlock *tb;
859
860 tb = s->tb;
861 if (unlikely(s->singlestep_enabled)) {
862 gen_exception(s, dest, EXCP_DEBUG);
863 } else if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) ||
864 (s->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
865 tcg_gen_goto_tb(n);
866 tcg_gen_movi_i32(QREG_PC, dest);
867 tcg_gen_exit_tb((long)tb + n);
868 } else {
869 gen_jmp_im(s, dest);
870 tcg_gen_exit_tb(0);
871 }
872 s->is_jmp = DISAS_TB_JUMP;
873 }
874
875 DISAS_INSN(undef_mac)
876 {
877 gen_exception(s, s->pc - 2, EXCP_LINEA);
878 }
879
880 DISAS_INSN(undef_fpu)
881 {
882 gen_exception(s, s->pc - 2, EXCP_LINEF);
883 }
884
885 DISAS_INSN(undef)
886 {
887 gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
888 cpu_abort(cpu_single_env, "Illegal instruction: %04x @ %08x",
889 insn, s->pc - 2);
890 }
891
892 DISAS_INSN(mulw)
893 {
894 TCGv reg;
895 TCGv tmp;
896 TCGv src;
897 int sign;
898
899 sign = (insn & 0x100) != 0;
900 reg = DREG(insn, 9);
901 tmp = tcg_temp_new();
902 if (sign)
903 tcg_gen_ext16s_i32(tmp, reg);
904 else
905 tcg_gen_ext16u_i32(tmp, reg);
906 SRC_EA(src, OS_WORD, sign, NULL);
907 tcg_gen_mul_i32(tmp, tmp, src);
908 tcg_gen_mov_i32(reg, tmp);
909 /* Unlike m68k, coldfire always clears the overflow bit. */
910 gen_logic_cc(s, tmp);
911 }
912
913 DISAS_INSN(divw)
914 {
915 TCGv reg;
916 TCGv tmp;
917 TCGv src;
918 int sign;
919
920 sign = (insn & 0x100) != 0;
921 reg = DREG(insn, 9);
922 if (sign) {
923 tcg_gen_ext16s_i32(QREG_DIV1, reg);
924 } else {
925 tcg_gen_ext16u_i32(QREG_DIV1, reg);
926 }
927 SRC_EA(src, OS_WORD, sign, NULL);
928 tcg_gen_mov_i32(QREG_DIV2, src);
929 if (sign) {
930 gen_helper_divs(cpu_env, tcg_const_i32(1));
931 } else {
932 gen_helper_divu(cpu_env, tcg_const_i32(1));
933 }
934
935 tmp = tcg_temp_new();
936 src = tcg_temp_new();
937 tcg_gen_ext16u_i32(tmp, QREG_DIV1);
938 tcg_gen_shli_i32(src, QREG_DIV2, 16);
939 tcg_gen_or_i32(reg, tmp, src);
940 s->cc_op = CC_OP_FLAGS;
941 }
942
943 DISAS_INSN(divl)
944 {
945 TCGv num;
946 TCGv den;
947 TCGv reg;
948 uint16_t ext;
949
950 ext = lduw_code(s->pc);
951 s->pc += 2;
952 if (ext & 0x87f8) {
953 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
954 return;
955 }
956 num = DREG(ext, 12);
957 reg = DREG(ext, 0);
958 tcg_gen_mov_i32(QREG_DIV1, num);
959 SRC_EA(den, OS_LONG, 0, NULL);
960 tcg_gen_mov_i32(QREG_DIV2, den);
961 if (ext & 0x0800) {
962 gen_helper_divs(cpu_env, tcg_const_i32(0));
963 } else {
964 gen_helper_divu(cpu_env, tcg_const_i32(0));
965 }
966 if ((ext & 7) == ((ext >> 12) & 7)) {
967 /* div */
968 tcg_gen_mov_i32 (reg, QREG_DIV1);
969 } else {
970 /* rem */
971 tcg_gen_mov_i32 (reg, QREG_DIV2);
972 }
973 s->cc_op = CC_OP_FLAGS;
974 }
975
976 DISAS_INSN(addsub)
977 {
978 TCGv reg;
979 TCGv dest;
980 TCGv src;
981 TCGv tmp;
982 TCGv addr;
983 int add;
984
985 add = (insn & 0x4000) != 0;
986 reg = DREG(insn, 9);
987 dest = tcg_temp_new();
988 if (insn & 0x100) {
989 SRC_EA(tmp, OS_LONG, 0, &addr);
990 src = reg;
991 } else {
992 tmp = reg;
993 SRC_EA(src, OS_LONG, 0, NULL);
994 }
995 if (add) {
996 tcg_gen_add_i32(dest, tmp, src);
997 gen_helper_xflag_lt(QREG_CC_X, dest, src);
998 s->cc_op = CC_OP_ADD;
999 } else {
1000 gen_helper_xflag_lt(QREG_CC_X, tmp, src);
1001 tcg_gen_sub_i32(dest, tmp, src);
1002 s->cc_op = CC_OP_SUB;
1003 }
1004 gen_update_cc_add(dest, src);
1005 if (insn & 0x100) {
1006 DEST_EA(insn, OS_LONG, dest, &addr);
1007 } else {
1008 tcg_gen_mov_i32(reg, dest);
1009 }
1010 }
1011
1012
1013 /* Reverse the order of the bits in REG. */
1014 DISAS_INSN(bitrev)
1015 {
1016 TCGv reg;
1017 reg = DREG(insn, 0);
1018 gen_helper_bitrev(reg, reg);
1019 }
1020
1021 DISAS_INSN(bitop_reg)
1022 {
1023 int opsize;
1024 int op;
1025 TCGv src1;
1026 TCGv src2;
1027 TCGv tmp;
1028 TCGv addr;
1029 TCGv dest;
1030
1031 if ((insn & 0x38) != 0)
1032 opsize = OS_BYTE;
1033 else
1034 opsize = OS_LONG;
1035 op = (insn >> 6) & 3;
1036 SRC_EA(src1, opsize, 0, op ? &addr: NULL);
1037 src2 = DREG(insn, 9);
1038 dest = tcg_temp_new();
1039
1040 gen_flush_flags(s);
1041 tmp = tcg_temp_new();
1042 if (opsize == OS_BYTE)
1043 tcg_gen_andi_i32(tmp, src2, 7);
1044 else
1045 tcg_gen_andi_i32(tmp, src2, 31);
1046 src2 = tmp;
1047 tmp = tcg_temp_new();
1048 tcg_gen_shr_i32(tmp, src1, src2);
1049 tcg_gen_andi_i32(tmp, tmp, 1);
1050 tcg_gen_shli_i32(tmp, tmp, 2);
1051 /* Clear CCF_Z if bit set. */
1052 tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
1053 tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1054
1055 tcg_gen_shl_i32(tmp, tcg_const_i32(1), src2);
1056 switch (op) {
1057 case 1: /* bchg */
1058 tcg_gen_xor_i32(dest, src1, tmp);
1059 break;
1060 case 2: /* bclr */
1061 tcg_gen_not_i32(tmp, tmp);
1062 tcg_gen_and_i32(dest, src1, tmp);
1063 break;
1064 case 3: /* bset */
1065 tcg_gen_or_i32(dest, src1, tmp);
1066 break;
1067 default: /* btst */
1068 break;
1069 }
1070 if (op)
1071 DEST_EA(insn, opsize, dest, &addr);
1072 }
1073
1074 DISAS_INSN(sats)
1075 {
1076 TCGv reg;
1077 reg = DREG(insn, 0);
1078 gen_flush_flags(s);
1079 gen_helper_sats(reg, reg, QREG_CC_DEST);
1080 gen_logic_cc(s, reg);
1081 }
1082
1083 static void gen_push(DisasContext *s, TCGv val)
1084 {
1085 TCGv tmp;
1086
1087 tmp = tcg_temp_new();
1088 tcg_gen_subi_i32(tmp, QREG_SP, 4);
1089 gen_store(s, OS_LONG, tmp, val);
1090 tcg_gen_mov_i32(QREG_SP, tmp);
1091 }
1092
1093 DISAS_INSN(movem)
1094 {
1095 TCGv addr;
1096 int i;
1097 uint16_t mask;
1098 TCGv reg;
1099 TCGv tmp;
1100 int is_load;
1101
1102 mask = lduw_code(s->pc);
1103 s->pc += 2;
1104 tmp = gen_lea(s, insn, OS_LONG);
1105 if (IS_NULL_QREG(tmp)) {
1106 gen_addr_fault(s);
1107 return;
1108 }
1109 addr = tcg_temp_new();
1110 tcg_gen_mov_i32(addr, tmp);
1111 is_load = ((insn & 0x0400) != 0);
1112 for (i = 0; i < 16; i++, mask >>= 1) {
1113 if (mask & 1) {
1114 if (i < 8)
1115 reg = DREG(i, 0);
1116 else
1117 reg = AREG(i, 0);
1118 if (is_load) {
1119 tmp = gen_load(s, OS_LONG, addr, 0);
1120 tcg_gen_mov_i32(reg, tmp);
1121 } else {
1122 gen_store(s, OS_LONG, addr, reg);
1123 }
1124 if (mask != 1)
1125 tcg_gen_addi_i32(addr, addr, 4);
1126 }
1127 }
1128 }
1129
1130 DISAS_INSN(bitop_im)
1131 {
1132 int opsize;
1133 int op;
1134 TCGv src1;
1135 uint32_t mask;
1136 int bitnum;
1137 TCGv tmp;
1138 TCGv addr;
1139
1140 if ((insn & 0x38) != 0)
1141 opsize = OS_BYTE;
1142 else
1143 opsize = OS_LONG;
1144 op = (insn >> 6) & 3;
1145
1146 bitnum = lduw_code(s->pc);
1147 s->pc += 2;
1148 if (bitnum & 0xff00) {
1149 disas_undef(s, insn);
1150 return;
1151 }
1152
1153 SRC_EA(src1, opsize, 0, op ? &addr: NULL);
1154
1155 gen_flush_flags(s);
1156 if (opsize == OS_BYTE)
1157 bitnum &= 7;
1158 else
1159 bitnum &= 31;
1160 mask = 1 << bitnum;
1161
1162 tmp = tcg_temp_new();
1163 assert (CCF_Z == (1 << 2));
1164 if (bitnum > 2)
1165 tcg_gen_shri_i32(tmp, src1, bitnum - 2);
1166 else if (bitnum < 2)
1167 tcg_gen_shli_i32(tmp, src1, 2 - bitnum);
1168 else
1169 tcg_gen_mov_i32(tmp, src1);
1170 tcg_gen_andi_i32(tmp, tmp, CCF_Z);
1171 /* Clear CCF_Z if bit set. */
1172 tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
1173 tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1174 if (op) {
1175 switch (op) {
1176 case 1: /* bchg */
1177 tcg_gen_xori_i32(tmp, src1, mask);
1178 break;
1179 case 2: /* bclr */
1180 tcg_gen_andi_i32(tmp, src1, ~mask);
1181 break;
1182 case 3: /* bset */
1183 tcg_gen_ori_i32(tmp, src1, mask);
1184 break;
1185 default: /* btst */
1186 break;
1187 }
1188 DEST_EA(insn, opsize, tmp, &addr);
1189 }
1190 }
1191
1192 DISAS_INSN(arith_im)
1193 {
1194 int op;
1195 uint32_t im;
1196 TCGv src1;
1197 TCGv dest;
1198 TCGv addr;
1199
1200 op = (insn >> 9) & 7;
1201 SRC_EA(src1, OS_LONG, 0, (op == 6) ? NULL : &addr);
1202 im = read_im32(s);
1203 dest = tcg_temp_new();
1204 switch (op) {
1205 case 0: /* ori */
1206 tcg_gen_ori_i32(dest, src1, im);
1207 gen_logic_cc(s, dest);
1208 break;
1209 case 1: /* andi */
1210 tcg_gen_andi_i32(dest, src1, im);
1211 gen_logic_cc(s, dest);
1212 break;
1213 case 2: /* subi */
1214 tcg_gen_mov_i32(dest, src1);
1215 gen_helper_xflag_lt(QREG_CC_X, dest, gen_im32(im));
1216 tcg_gen_subi_i32(dest, dest, im);
1217 gen_update_cc_add(dest, gen_im32(im));
1218 s->cc_op = CC_OP_SUB;
1219 break;
1220 case 3: /* addi */
1221 tcg_gen_mov_i32(dest, src1);
1222 tcg_gen_addi_i32(dest, dest, im);
1223 gen_update_cc_add(dest, gen_im32(im));
1224 gen_helper_xflag_lt(QREG_CC_X, dest, gen_im32(im));
1225 s->cc_op = CC_OP_ADD;
1226 break;
1227 case 5: /* eori */
1228 tcg_gen_xori_i32(dest, src1, im);
1229 gen_logic_cc(s, dest);
1230 break;
1231 case 6: /* cmpi */
1232 tcg_gen_mov_i32(dest, src1);
1233 tcg_gen_subi_i32(dest, dest, im);
1234 gen_update_cc_add(dest, gen_im32(im));
1235 s->cc_op = CC_OP_SUB;
1236 break;
1237 default:
1238 abort();
1239 }
1240 if (op != 6) {
1241 DEST_EA(insn, OS_LONG, dest, &addr);
1242 }
1243 }
1244
1245 DISAS_INSN(byterev)
1246 {
1247 TCGv reg;
1248
1249 reg = DREG(insn, 0);
1250 tcg_gen_bswap_i32(reg, reg);
1251 }
1252
1253 DISAS_INSN(move)
1254 {
1255 TCGv src;
1256 TCGv dest;
1257 int op;
1258 int opsize;
1259
1260 switch (insn >> 12) {
1261 case 1: /* move.b */
1262 opsize = OS_BYTE;
1263 break;
1264 case 2: /* move.l */
1265 opsize = OS_LONG;
1266 break;
1267 case 3: /* move.w */
1268 opsize = OS_WORD;
1269 break;
1270 default:
1271 abort();
1272 }
1273 SRC_EA(src, opsize, 1, NULL);
1274 op = (insn >> 6) & 7;
1275 if (op == 1) {
1276 /* movea */
1277 /* The value will already have been sign extended. */
1278 dest = AREG(insn, 9);
1279 tcg_gen_mov_i32(dest, src);
1280 } else {
1281 /* normal move */
1282 uint16_t dest_ea;
1283 dest_ea = ((insn >> 9) & 7) | (op << 3);
1284 DEST_EA(dest_ea, opsize, src, NULL);
1285 /* This will be correct because loads sign extend. */
1286 gen_logic_cc(s, src);
1287 }
1288 }
1289
1290 DISAS_INSN(negx)
1291 {
1292 TCGv reg;
1293
1294 gen_flush_flags(s);
1295 reg = DREG(insn, 0);
1296 gen_helper_subx_cc(reg, cpu_env, tcg_const_i32(0), reg);
1297 }
1298
1299 DISAS_INSN(lea)
1300 {
1301 TCGv reg;
1302 TCGv tmp;
1303
1304 reg = AREG(insn, 9);
1305 tmp = gen_lea(s, insn, OS_LONG);
1306 if (IS_NULL_QREG(tmp)) {
1307 gen_addr_fault(s);
1308 return;
1309 }
1310 tcg_gen_mov_i32(reg, tmp);
1311 }
1312
1313 DISAS_INSN(clr)
1314 {
1315 int opsize;
1316
1317 switch ((insn >> 6) & 3) {
1318 case 0: /* clr.b */
1319 opsize = OS_BYTE;
1320 break;
1321 case 1: /* clr.w */
1322 opsize = OS_WORD;
1323 break;
1324 case 2: /* clr.l */
1325 opsize = OS_LONG;
1326 break;
1327 default:
1328 abort();
1329 }
1330 DEST_EA(insn, opsize, gen_im32(0), NULL);
1331 gen_logic_cc(s, gen_im32(0));
1332 }
1333
1334 static TCGv gen_get_ccr(DisasContext *s)
1335 {
1336 TCGv dest;
1337
1338 gen_flush_flags(s);
1339 dest = tcg_temp_new();
1340 tcg_gen_shli_i32(dest, QREG_CC_X, 4);
1341 tcg_gen_or_i32(dest, dest, QREG_CC_DEST);
1342 return dest;
1343 }
1344
1345 DISAS_INSN(move_from_ccr)
1346 {
1347 TCGv reg;
1348 TCGv ccr;
1349
1350 ccr = gen_get_ccr(s);
1351 reg = DREG(insn, 0);
1352 gen_partset_reg(OS_WORD, reg, ccr);
1353 }
1354
1355 DISAS_INSN(neg)
1356 {
1357 TCGv reg;
1358 TCGv src1;
1359
1360 reg = DREG(insn, 0);
1361 src1 = tcg_temp_new();
1362 tcg_gen_mov_i32(src1, reg);
1363 tcg_gen_neg_i32(reg, src1);
1364 s->cc_op = CC_OP_SUB;
1365 gen_update_cc_add(reg, src1);
1366 gen_helper_xflag_lt(QREG_CC_X, tcg_const_i32(0), src1);
1367 s->cc_op = CC_OP_SUB;
1368 }
1369
1370 static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
1371 {
1372 tcg_gen_movi_i32(QREG_CC_DEST, val & 0xf);
1373 tcg_gen_movi_i32(QREG_CC_X, (val & 0x10) >> 4);
1374 if (!ccr_only) {
1375 gen_helper_set_sr(cpu_env, tcg_const_i32(val & 0xff00));
1376 }
1377 }
1378
1379 static void gen_set_sr(DisasContext *s, uint16_t insn, int ccr_only)
1380 {
1381 TCGv tmp;
1382 TCGv reg;
1383
1384 s->cc_op = CC_OP_FLAGS;
1385 if ((insn & 0x38) == 0)
1386 {
1387 tmp = tcg_temp_new();
1388 reg = DREG(insn, 0);
1389 tcg_gen_andi_i32(QREG_CC_DEST, reg, 0xf);
1390 tcg_gen_shri_i32(tmp, reg, 4);
1391 tcg_gen_andi_i32(QREG_CC_X, tmp, 1);
1392 if (!ccr_only) {
1393 gen_helper_set_sr(cpu_env, reg);
1394 }
1395 }
1396 else if ((insn & 0x3f) == 0x3c)
1397 {
1398 uint16_t val;
1399 val = lduw_code(s->pc);
1400 s->pc += 2;
1401 gen_set_sr_im(s, val, ccr_only);
1402 }
1403 else
1404 disas_undef(s, insn);
1405 }
1406
1407 DISAS_INSN(move_to_ccr)
1408 {
1409 gen_set_sr(s, insn, 1);
1410 }
1411
1412 DISAS_INSN(not)
1413 {
1414 TCGv reg;
1415
1416 reg = DREG(insn, 0);
1417 tcg_gen_not_i32(reg, reg);
1418 gen_logic_cc(s, reg);
1419 }
1420
1421 DISAS_INSN(swap)
1422 {
1423 TCGv src1;
1424 TCGv src2;
1425 TCGv reg;
1426
1427 src1 = tcg_temp_new();
1428 src2 = tcg_temp_new();
1429 reg = DREG(insn, 0);
1430 tcg_gen_shli_i32(src1, reg, 16);
1431 tcg_gen_shri_i32(src2, reg, 16);
1432 tcg_gen_or_i32(reg, src1, src2);
1433 gen_logic_cc(s, reg);
1434 }
1435
1436 DISAS_INSN(pea)
1437 {
1438 TCGv tmp;
1439
1440 tmp = gen_lea(s, insn, OS_LONG);
1441 if (IS_NULL_QREG(tmp)) {
1442 gen_addr_fault(s);
1443 return;
1444 }
1445 gen_push(s, tmp);
1446 }
1447
1448 DISAS_INSN(ext)
1449 {
1450 int op;
1451 TCGv reg;
1452 TCGv tmp;
1453
1454 reg = DREG(insn, 0);
1455 op = (insn >> 6) & 7;
1456 tmp = tcg_temp_new();
1457 if (op == 3)
1458 tcg_gen_ext16s_i32(tmp, reg);
1459 else
1460 tcg_gen_ext8s_i32(tmp, reg);
1461 if (op == 2)
1462 gen_partset_reg(OS_WORD, reg, tmp);
1463 else
1464 tcg_gen_mov_i32(reg, tmp);
1465 gen_logic_cc(s, tmp);
1466 }
1467
1468 DISAS_INSN(tst)
1469 {
1470 int opsize;
1471 TCGv tmp;
1472
1473 switch ((insn >> 6) & 3) {
1474 case 0: /* tst.b */
1475 opsize = OS_BYTE;
1476 break;
1477 case 1: /* tst.w */
1478 opsize = OS_WORD;
1479 break;
1480 case 2: /* tst.l */
1481 opsize = OS_LONG;
1482 break;
1483 default:
1484 abort();
1485 }
1486 SRC_EA(tmp, opsize, 1, NULL);
1487 gen_logic_cc(s, tmp);
1488 }
1489
1490 DISAS_INSN(pulse)
1491 {
1492 /* Implemented as a NOP. */
1493 }
1494
1495 DISAS_INSN(illegal)
1496 {
1497 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
1498 }
1499
1500 /* ??? This should be atomic. */
1501 DISAS_INSN(tas)
1502 {
1503 TCGv dest;
1504 TCGv src1;
1505 TCGv addr;
1506
1507 dest = tcg_temp_new();
1508 SRC_EA(src1, OS_BYTE, 1, &addr);
1509 gen_logic_cc(s, src1);
1510 tcg_gen_ori_i32(dest, src1, 0x80);
1511 DEST_EA(insn, OS_BYTE, dest, &addr);
1512 }
1513
1514 DISAS_INSN(mull)
1515 {
1516 uint16_t ext;
1517 TCGv reg;
1518 TCGv src1;
1519 TCGv dest;
1520
1521 /* The upper 32 bits of the product are discarded, so
1522 muls.l and mulu.l are functionally equivalent. */
1523 ext = lduw_code(s->pc);
1524 s->pc += 2;
1525 if (ext & 0x87ff) {
1526 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
1527 return;
1528 }
1529 reg = DREG(ext, 12);
1530 SRC_EA(src1, OS_LONG, 0, NULL);
1531 dest = tcg_temp_new();
1532 tcg_gen_mul_i32(dest, src1, reg);
1533 tcg_gen_mov_i32(reg, dest);
1534 /* Unlike m68k, coldfire always clears the overflow bit. */
1535 gen_logic_cc(s, dest);
1536 }
1537
1538 DISAS_INSN(link)
1539 {
1540 int16_t offset;
1541 TCGv reg;
1542 TCGv tmp;
1543
1544 offset = ldsw_code(s->pc);
1545 s->pc += 2;
1546 reg = AREG(insn, 0);
1547 tmp = tcg_temp_new();
1548 tcg_gen_subi_i32(tmp, QREG_SP, 4);
1549 gen_store(s, OS_LONG, tmp, reg);
1550 if ((insn & 7) != 7)
1551 tcg_gen_mov_i32(reg, tmp);
1552 tcg_gen_addi_i32(QREG_SP, tmp, offset);
1553 }
1554
1555 DISAS_INSN(unlk)
1556 {
1557 TCGv src;
1558 TCGv reg;
1559 TCGv tmp;
1560
1561 src = tcg_temp_new();
1562 reg = AREG(insn, 0);
1563 tcg_gen_mov_i32(src, reg);
1564 tmp = gen_load(s, OS_LONG, src, 0);
1565 tcg_gen_mov_i32(reg, tmp);
1566 tcg_gen_addi_i32(QREG_SP, src, 4);
1567 }
1568
1569 DISAS_INSN(nop)
1570 {
1571 }
1572
1573 DISAS_INSN(rts)
1574 {
1575 TCGv tmp;
1576
1577 tmp = gen_load(s, OS_LONG, QREG_SP, 0);
1578 tcg_gen_addi_i32(QREG_SP, QREG_SP, 4);
1579 gen_jmp(s, tmp);
1580 }
1581
1582 DISAS_INSN(jump)
1583 {
1584 TCGv tmp;
1585
1586 /* Load the target address first to ensure correct exception
1587 behavior. */
1588 tmp = gen_lea(s, insn, OS_LONG);
1589 if (IS_NULL_QREG(tmp)) {
1590 gen_addr_fault(s);
1591 return;
1592 }
1593 if ((insn & 0x40) == 0) {
1594 /* jsr */
1595 gen_push(s, gen_im32(s->pc));
1596 }
1597 gen_jmp(s, tmp);
1598 }
1599
1600 DISAS_INSN(addsubq)
1601 {
1602 TCGv src1;
1603 TCGv src2;
1604 TCGv dest;
1605 int val;
1606 TCGv addr;
1607
1608 SRC_EA(src1, OS_LONG, 0, &addr);
1609 val = (insn >> 9) & 7;
1610 if (val == 0)
1611 val = 8;
1612 dest = tcg_temp_new();
1613 tcg_gen_mov_i32(dest, src1);
1614 if ((insn & 0x38) == 0x08) {
1615 /* Don't update condition codes if the destination is an
1616 address register. */
1617 if (insn & 0x0100) {
1618 tcg_gen_subi_i32(dest, dest, val);
1619 } else {
1620 tcg_gen_addi_i32(dest, dest, val);
1621 }
1622 } else {
1623 src2 = gen_im32(val);
1624 if (insn & 0x0100) {
1625 gen_helper_xflag_lt(QREG_CC_X, dest, src2);
1626 tcg_gen_subi_i32(dest, dest, val);
1627 s->cc_op = CC_OP_SUB;
1628 } else {
1629 tcg_gen_addi_i32(dest, dest, val);
1630 gen_helper_xflag_lt(QREG_CC_X, dest, src2);
1631 s->cc_op = CC_OP_ADD;
1632 }
1633 gen_update_cc_add(dest, src2);
1634 }
1635 DEST_EA(insn, OS_LONG, dest, &addr);
1636 }
1637
1638 DISAS_INSN(tpf)
1639 {
1640 switch (insn & 7) {
1641 case 2: /* One extension word. */
1642 s->pc += 2;
1643 break;
1644 case 3: /* Two extension words. */
1645 s->pc += 4;
1646 break;
1647 case 4: /* No extension words. */
1648 break;
1649 default:
1650 disas_undef(s, insn);
1651 }
1652 }
1653
1654 DISAS_INSN(branch)
1655 {
1656 int32_t offset;
1657 uint32_t base;
1658 int op;
1659 int l1;
1660
1661 base = s->pc;
1662 op = (insn >> 8) & 0xf;
1663 offset = (int8_t)insn;
1664 if (offset == 0) {
1665 offset = ldsw_code(s->pc);
1666 s->pc += 2;
1667 } else if (offset == -1) {
1668 offset = read_im32(s);
1669 }
1670 if (op == 1) {
1671 /* bsr */
1672 gen_push(s, gen_im32(s->pc));
1673 }
1674 gen_flush_cc_op(s);
1675 if (op > 1) {
1676 /* Bcc */
1677 l1 = gen_new_label();
1678 gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
1679 gen_jmp_tb(s, 1, base + offset);
1680 gen_set_label(l1);
1681 gen_jmp_tb(s, 0, s->pc);
1682 } else {
1683 /* Unconditional branch. */
1684 gen_jmp_tb(s, 0, base + offset);
1685 }
1686 }
1687
1688 DISAS_INSN(moveq)
1689 {
1690 uint32_t val;
1691
1692 val = (int8_t)insn;
1693 tcg_gen_movi_i32(DREG(insn, 9), val);
1694 gen_logic_cc(s, tcg_const_i32(val));
1695 }
1696
1697 DISAS_INSN(mvzs)
1698 {
1699 int opsize;
1700 TCGv src;
1701 TCGv reg;
1702
1703 if (insn & 0x40)
1704 opsize = OS_WORD;
1705 else
1706 opsize = OS_BYTE;
1707 SRC_EA(src, opsize, (insn & 0x80) == 0, NULL);
1708 reg = DREG(insn, 9);
1709 tcg_gen_mov_i32(reg, src);
1710 gen_logic_cc(s, src);
1711 }
1712
1713 DISAS_INSN(or)
1714 {
1715 TCGv reg;
1716 TCGv dest;
1717 TCGv src;
1718 TCGv addr;
1719
1720 reg = DREG(insn, 9);
1721 dest = tcg_temp_new();
1722 if (insn & 0x100) {
1723 SRC_EA(src, OS_LONG, 0, &addr);
1724 tcg_gen_or_i32(dest, src, reg);
1725 DEST_EA(insn, OS_LONG, dest, &addr);
1726 } else {
1727 SRC_EA(src, OS_LONG, 0, NULL);
1728 tcg_gen_or_i32(dest, src, reg);
1729 tcg_gen_mov_i32(reg, dest);
1730 }
1731 gen_logic_cc(s, dest);
1732 }
1733
1734 DISAS_INSN(suba)
1735 {
1736 TCGv src;
1737 TCGv reg;
1738
1739 SRC_EA(src, OS_LONG, 0, NULL);
1740 reg = AREG(insn, 9);
1741 tcg_gen_sub_i32(reg, reg, src);
1742 }
1743
1744 DISAS_INSN(subx)
1745 {
1746 TCGv reg;
1747 TCGv src;
1748
1749 gen_flush_flags(s);
1750 reg = DREG(insn, 9);
1751 src = DREG(insn, 0);
1752 gen_helper_subx_cc(reg, cpu_env, reg, src);
1753 }
1754
1755 DISAS_INSN(mov3q)
1756 {
1757 TCGv src;
1758 int val;
1759
1760 val = (insn >> 9) & 7;
1761 if (val == 0)
1762 val = -1;
1763 src = gen_im32(val);
1764 gen_logic_cc(s, src);
1765 DEST_EA(insn, OS_LONG, src, NULL);
1766 }
1767
1768 DISAS_INSN(cmp)
1769 {
1770 int op;
1771 TCGv src;
1772 TCGv reg;
1773 TCGv dest;
1774 int opsize;
1775
1776 op = (insn >> 6) & 3;
1777 switch (op) {
1778 case 0: /* cmp.b */
1779 opsize = OS_BYTE;
1780 s->cc_op = CC_OP_CMPB;
1781 break;
1782 case 1: /* cmp.w */
1783 opsize = OS_WORD;
1784 s->cc_op = CC_OP_CMPW;
1785 break;
1786 case 2: /* cmp.l */
1787 opsize = OS_LONG;
1788 s->cc_op = CC_OP_SUB;
1789 break;
1790 default:
1791 abort();
1792 }
1793 SRC_EA(src, opsize, 1, NULL);
1794 reg = DREG(insn, 9);
1795 dest = tcg_temp_new();
1796 tcg_gen_sub_i32(dest, reg, src);
1797 gen_update_cc_add(dest, src);
1798 }
1799
1800 DISAS_INSN(cmpa)
1801 {
1802 int opsize;
1803 TCGv src;
1804 TCGv reg;
1805 TCGv dest;
1806
1807 if (insn & 0x100) {
1808 opsize = OS_LONG;
1809 } else {
1810 opsize = OS_WORD;
1811 }
1812 SRC_EA(src, opsize, 1, NULL);
1813 reg = AREG(insn, 9);
1814 dest = tcg_temp_new();
1815 tcg_gen_sub_i32(dest, reg, src);
1816 gen_update_cc_add(dest, src);
1817 s->cc_op = CC_OP_SUB;
1818 }
1819
1820 DISAS_INSN(eor)
1821 {
1822 TCGv src;
1823 TCGv reg;
1824 TCGv dest;
1825 TCGv addr;
1826
1827 SRC_EA(src, OS_LONG, 0, &addr);
1828 reg = DREG(insn, 9);
1829 dest = tcg_temp_new();
1830 tcg_gen_xor_i32(dest, src, reg);
1831 gen_logic_cc(s, dest);
1832 DEST_EA(insn, OS_LONG, dest, &addr);
1833 }
1834
1835 DISAS_INSN(and)
1836 {
1837 TCGv src;
1838 TCGv reg;
1839 TCGv dest;
1840 TCGv addr;
1841
1842 reg = DREG(insn, 9);
1843 dest = tcg_temp_new();
1844 if (insn & 0x100) {
1845 SRC_EA(src, OS_LONG, 0, &addr);
1846 tcg_gen_and_i32(dest, src, reg);
1847 DEST_EA(insn, OS_LONG, dest, &addr);
1848 } else {
1849 SRC_EA(src, OS_LONG, 0, NULL);
1850 tcg_gen_and_i32(dest, src, reg);
1851 tcg_gen_mov_i32(reg, dest);
1852 }
1853 gen_logic_cc(s, dest);
1854 }
1855
1856 DISAS_INSN(adda)
1857 {
1858 TCGv src;
1859 TCGv reg;
1860
1861 SRC_EA(src, OS_LONG, 0, NULL);
1862 reg = AREG(insn, 9);
1863 tcg_gen_add_i32(reg, reg, src);
1864 }
1865
1866 DISAS_INSN(addx)
1867 {
1868 TCGv reg;
1869 TCGv src;
1870
1871 gen_flush_flags(s);
1872 reg = DREG(insn, 9);
1873 src = DREG(insn, 0);
1874 gen_helper_addx_cc(reg, cpu_env, reg, src);
1875 s->cc_op = CC_OP_FLAGS;
1876 }
1877
1878 /* TODO: This could be implemented without helper functions. */
1879 DISAS_INSN(shift_im)
1880 {
1881 TCGv reg;
1882 int tmp;
1883 TCGv shift;
1884
1885 reg = DREG(insn, 0);
1886 tmp = (insn >> 9) & 7;
1887 if (tmp == 0)
1888 tmp = 8;
1889 shift = gen_im32(tmp);
1890 /* No need to flush flags becuse we know we will set C flag. */
1891 if (insn & 0x100) {
1892 gen_helper_shl_cc(reg, cpu_env, reg, shift);
1893 } else {
1894 if (insn & 8) {
1895 gen_helper_shr_cc(reg, cpu_env, reg, shift);
1896 } else {
1897 gen_helper_sar_cc(reg, cpu_env, reg, shift);
1898 }
1899 }
1900 s->cc_op = CC_OP_SHIFT;
1901 }
1902
1903 DISAS_INSN(shift_reg)
1904 {
1905 TCGv reg;
1906 TCGv shift;
1907
1908 reg = DREG(insn, 0);
1909 shift = DREG(insn, 9);
1910 /* Shift by zero leaves C flag unmodified. */
1911 gen_flush_flags(s);
1912 if (insn & 0x100) {
1913 gen_helper_shl_cc(reg, cpu_env, reg, shift);
1914 } else {
1915 if (insn & 8) {
1916 gen_helper_shr_cc(reg, cpu_env, reg, shift);
1917 } else {
1918 gen_helper_sar_cc(reg, cpu_env, reg, shift);
1919 }
1920 }
1921 s->cc_op = CC_OP_SHIFT;
1922 }
1923
1924 DISAS_INSN(ff1)
1925 {
1926 TCGv reg;
1927 reg = DREG(insn, 0);
1928 gen_logic_cc(s, reg);
1929 gen_helper_ff1(reg, reg);
1930 }
1931
1932 static TCGv gen_get_sr(DisasContext *s)
1933 {
1934 TCGv ccr;
1935 TCGv sr;
1936
1937 ccr = gen_get_ccr(s);
1938 sr = tcg_temp_new();
1939 tcg_gen_andi_i32(sr, QREG_SR, 0xffe0);
1940 tcg_gen_or_i32(sr, sr, ccr);
1941 return sr;
1942 }
1943
1944 DISAS_INSN(strldsr)
1945 {
1946 uint16_t ext;
1947 uint32_t addr;
1948
1949 addr = s->pc - 2;
1950 ext = lduw_code(s->pc);
1951 s->pc += 2;
1952 if (ext != 0x46FC) {
1953 gen_exception(s, addr, EXCP_UNSUPPORTED);
1954 return;
1955 }
1956 ext = lduw_code(s->pc);
1957 s->pc += 2;
1958 if (IS_USER(s) || (ext & SR_S) == 0) {
1959 gen_exception(s, addr, EXCP_PRIVILEGE);
1960 return;
1961 }
1962 gen_push(s, gen_get_sr(s));
1963 gen_set_sr_im(s, ext, 0);
1964 }
1965
1966 DISAS_INSN(move_from_sr)
1967 {
1968 TCGv reg;
1969 TCGv sr;
1970
1971 if (IS_USER(s)) {
1972 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1973 return;
1974 }
1975 sr = gen_get_sr(s);
1976 reg = DREG(insn, 0);
1977 gen_partset_reg(OS_WORD, reg, sr);
1978 }
1979
1980 DISAS_INSN(move_to_sr)
1981 {
1982 if (IS_USER(s)) {
1983 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1984 return;
1985 }
1986 gen_set_sr(s, insn, 0);
1987 gen_lookup_tb(s);
1988 }
1989
1990 DISAS_INSN(move_from_usp)
1991 {
1992 if (IS_USER(s)) {
1993 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1994 return;
1995 }
1996 /* TODO: Implement USP. */
1997 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
1998 }
1999
2000 DISAS_INSN(move_to_usp)
2001 {
2002 if (IS_USER(s)) {
2003 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2004 return;
2005 }
2006 /* TODO: Implement USP. */
2007 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
2008 }
2009
2010 DISAS_INSN(halt)
2011 {
2012 gen_exception(s, s->pc, EXCP_HALT_INSN);
2013 }
2014
2015 DISAS_INSN(stop)
2016 {
2017 uint16_t ext;
2018
2019 if (IS_USER(s)) {
2020 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2021 return;
2022 }
2023
2024 ext = lduw_code(s->pc);
2025 s->pc += 2;
2026
2027 gen_set_sr_im(s, ext, 0);
2028 tcg_gen_movi_i32(QREG_HALTED, 1);
2029 gen_exception(s, s->pc, EXCP_HLT);
2030 }
2031
2032 DISAS_INSN(rte)
2033 {
2034 if (IS_USER(s)) {
2035 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2036 return;
2037 }
2038 gen_exception(s, s->pc - 2, EXCP_RTE);
2039 }
2040
2041 DISAS_INSN(movec)
2042 {
2043 uint16_t ext;
2044 TCGv reg;
2045
2046 if (IS_USER(s)) {
2047 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2048 return;
2049 }
2050
2051 ext = lduw_code(s->pc);
2052 s->pc += 2;
2053
2054 if (ext & 0x8000) {
2055 reg = AREG(ext, 12);
2056 } else {
2057 reg = DREG(ext, 12);
2058 }
2059 gen_helper_movec(cpu_env, tcg_const_i32(ext & 0xfff), reg);
2060 gen_lookup_tb(s);
2061 }
2062
2063 DISAS_INSN(intouch)
2064 {
2065 if (IS_USER(s)) {
2066 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2067 return;
2068 }
2069 /* ICache fetch. Implement as no-op. */
2070 }
2071
2072 DISAS_INSN(cpushl)
2073 {
2074 if (IS_USER(s)) {
2075 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2076 return;
2077 }
2078 /* Cache push/invalidate. Implement as no-op. */
2079 }
2080
2081 DISAS_INSN(wddata)
2082 {
2083 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2084 }
2085
2086 DISAS_INSN(wdebug)
2087 {
2088 if (IS_USER(s)) {
2089 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2090 return;
2091 }
2092 /* TODO: Implement wdebug. */
2093 qemu_assert(0, "WDEBUG not implemented");
2094 }
2095
2096 DISAS_INSN(trap)
2097 {
2098 gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));
2099 }
2100
2101 /* ??? FP exceptions are not implemented. Most exceptions are deferred until
2102 immediately before the next FP instruction is executed. */
2103 DISAS_INSN(fpu)
2104 {
2105 uint16_t ext;
2106 int32_t offset;
2107 int opmode;
2108 TCGv_i64 src;
2109 TCGv_i64 dest;
2110 TCGv_i64 res;
2111 TCGv tmp32;
2112 int round;
2113 int set_dest;
2114 int opsize;
2115
2116 ext = lduw_code(s->pc);
2117 s->pc += 2;
2118 opmode = ext & 0x7f;
2119 switch ((ext >> 13) & 7) {
2120 case 0: case 2:
2121 break;
2122 case 1:
2123 goto undef;
2124 case 3: /* fmove out */
2125 src = FREG(ext, 7);
2126 tmp32 = tcg_temp_new_i32();
2127 /* fmove */
2128 /* ??? TODO: Proper behavior on overflow. */
2129 switch ((ext >> 10) & 7) {
2130 case 0:
2131 opsize = OS_LONG;
2132 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2133 break;
2134 case 1:
2135 opsize = OS_SINGLE;
2136 gen_helper_f64_to_f32(tmp32, cpu_env, src);
2137 break;
2138 case 4:
2139 opsize = OS_WORD;
2140 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2141 break;
2142 case 5: /* OS_DOUBLE */
2143 tcg_gen_mov_i32(tmp32, AREG(insn, 0));
2144 switch (insn >> 3) {
2145 case 2:
2146 case 3:
2147 case 4:
2148 tcg_gen_addi_i32(tmp32, tmp32, -8);
2149 break;
2150 case 5:
2151 offset = ldsw_code(s->pc);
2152 s->pc += 2;
2153 tcg_gen_addi_i32(tmp32, tmp32, offset);
2154 break;
2155 default:
2156 goto undef;
2157 }
2158 gen_store64(s, tmp32, src);
2159 switch (insn >> 3) {
2160 case 3:
2161 tcg_gen_addi_i32(tmp32, tmp32, 8);
2162 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2163 break;
2164 case 4:
2165 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2166 break;
2167 }
2168 tcg_temp_free_i32(tmp32);
2169 return;
2170 case 6:
2171 opsize = OS_BYTE;
2172 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2173 break;
2174 default:
2175 goto undef;
2176 }
2177 DEST_EA(insn, opsize, tmp32, NULL);
2178 tcg_temp_free_i32(tmp32);
2179 return;
2180 case 4: /* fmove to control register. */
2181 switch ((ext >> 10) & 7) {
2182 case 4: /* FPCR */
2183 /* Not implemented. Ignore writes. */
2184 break;
2185 case 1: /* FPIAR */
2186 case 2: /* FPSR */
2187 default:
2188 cpu_abort(NULL, "Unimplemented: fmove to control %d",
2189 (ext >> 10) & 7);
2190 }
2191 break;
2192 case 5: /* fmove from control register. */
2193 switch ((ext >> 10) & 7) {
2194 case 4: /* FPCR */
2195 /* Not implemented. Always return zero. */
2196 tmp32 = gen_im32(0);
2197 break;
2198 case 1: /* FPIAR */
2199 case 2: /* FPSR */
2200 default:
2201 cpu_abort(NULL, "Unimplemented: fmove from control %d",
2202 (ext >> 10) & 7);
2203 goto undef;
2204 }
2205 DEST_EA(insn, OS_LONG, tmp32, NULL);
2206 break;
2207 case 6: /* fmovem */
2208 case 7:
2209 {
2210 TCGv addr;
2211 uint16_t mask;
2212 int i;
2213 if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0)
2214 goto undef;
2215 tmp32 = gen_lea(s, insn, OS_LONG);
2216 if (IS_NULL_QREG(tmp32)) {
2217 gen_addr_fault(s);
2218 return;
2219 }
2220 addr = tcg_temp_new_i32();
2221 tcg_gen_mov_i32(addr, tmp32);
2222 mask = 0x80;
2223 for (i = 0; i < 8; i++) {
2224 if (ext & mask) {
2225 s->is_mem = 1;
2226 dest = FREG(i, 0);
2227 if (ext & (1 << 13)) {
2228 /* store */
2229 tcg_gen_qemu_stf64(dest, addr, IS_USER(s));
2230 } else {
2231 /* load */
2232 tcg_gen_qemu_ldf64(dest, addr, IS_USER(s));
2233 }
2234 if (ext & (mask - 1))
2235 tcg_gen_addi_i32(addr, addr, 8);
2236 }
2237 mask >>= 1;
2238 }
2239 tcg_temp_free_i32(tmp32);
2240 }
2241 return;
2242 }
2243 if (ext & (1 << 14)) {
2244 /* Source effective address. */
2245 switch ((ext >> 10) & 7) {
2246 case 0: opsize = OS_LONG; break;
2247 case 1: opsize = OS_SINGLE; break;
2248 case 4: opsize = OS_WORD; break;
2249 case 5: opsize = OS_DOUBLE; break;
2250 case 6: opsize = OS_BYTE; break;
2251 default:
2252 goto undef;
2253 }
2254 if (opsize == OS_DOUBLE) {
2255 tmp32 = tcg_temp_new_i32();
2256 tcg_gen_mov_i32(tmp32, AREG(insn, 0));
2257 switch (insn >> 3) {
2258 case 2:
2259 case 3:
2260 case 4:
2261 tcg_gen_addi_i32(tmp32, tmp32, -8);
2262 break;
2263 case 5:
2264 offset = ldsw_code(s->pc);
2265 s->pc += 2;
2266 tcg_gen_addi_i32(tmp32, tmp32, offset);
2267 break;
2268 case 7:
2269 offset = ldsw_code(s->pc);
2270 offset += s->pc - 2;
2271 s->pc += 2;
2272 tcg_gen_addi_i32(tmp32, tmp32, offset);
2273 break;
2274 default:
2275 goto undef;
2276 }
2277 src = gen_load64(s, tmp32);
2278 switch (insn >> 3) {
2279 case 3:
2280 tcg_gen_addi_i32(tmp32, tmp32, 8);
2281 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2282 break;
2283 case 4:
2284 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2285 break;
2286 }
2287 tcg_temp_free_i32(tmp32);
2288 } else {
2289 SRC_EA(tmp32, opsize, 1, NULL);
2290 src = tcg_temp_new_i64();
2291 switch (opsize) {
2292 case OS_LONG:
2293 case OS_WORD:
2294 case OS_BYTE:
2295 gen_helper_i32_to_f64(src, cpu_env, tmp32);
2296 break;
2297 case OS_SINGLE:
2298 gen_helper_f32_to_f64(src, cpu_env, tmp32);
2299 break;
2300 }
2301 }
2302 } else {
2303 /* Source register. */
2304 src = FREG(ext, 10);
2305 }
2306 dest = FREG(ext, 7);
2307 res = tcg_temp_new_i64();
2308 if (opmode != 0x3a)
2309 tcg_gen_mov_f64(res, dest);
2310 round = 1;
2311 set_dest = 1;
2312 switch (opmode) {
2313 case 0: case 0x40: case 0x44: /* fmove */
2314 tcg_gen_mov_f64(res, src);
2315 break;
2316 case 1: /* fint */
2317 gen_helper_iround_f64(res, cpu_env, src);
2318 round = 0;
2319 break;
2320 case 3: /* fintrz */
2321 gen_helper_itrunc_f64(res, cpu_env, src);
2322 round = 0;
2323 break;
2324 case 4: case 0x41: case 0x45: /* fsqrt */
2325 gen_helper_sqrt_f64(res, cpu_env, src);
2326 break;
2327 case 0x18: case 0x58: case 0x5c: /* fabs */
2328 gen_helper_abs_f64(res, src);
2329 break;
2330 case 0x1a: case 0x5a: case 0x5e: /* fneg */
2331 gen_helper_chs_f64(res, src);
2332 break;
2333 case 0x20: case 0x60: case 0x64: /* fdiv */
2334 gen_helper_div_f64(res, cpu_env, res, src);
2335 break;
2336 case 0x22: case 0x62: case 0x66: /* fadd */
2337 gen_helper_add_f64(res, cpu_env, res, src);
2338 break;
2339 case 0x23: case 0x63: case 0x67: /* fmul */
2340 gen_helper_mul_f64(res, cpu_env, res, src);
2341 break;
2342 case 0x28: case 0x68: case 0x6c: /* fsub */
2343 gen_helper_sub_f64(res, cpu_env, res, src);
2344 break;
2345 case 0x38: /* fcmp */
2346 gen_helper_sub_cmp_f64(res, cpu_env, res, src);
2347 set_dest = 0;
2348 round = 0;
2349 break;
2350 case 0x3a: /* ftst */
2351 tcg_gen_mov_f64(res, src);
2352 set_dest = 0;
2353 round = 0;
2354 break;
2355 default:
2356 goto undef;
2357 }
2358 if (ext & (1 << 14)) {
2359 tcg_temp_free_i64(src);
2360 }
2361 if (round) {
2362 if (opmode & 0x40) {
2363 if ((opmode & 0x4) != 0)
2364 round = 0;
2365 } else if ((s->fpcr & M68K_FPCR_PREC) == 0) {
2366 round = 0;
2367 }
2368 }
2369 if (round) {
2370 TCGv tmp = tcg_temp_new_i32();
2371 gen_helper_f64_to_f32(tmp, cpu_env, res);
2372 gen_helper_f32_to_f64(res, cpu_env, tmp);
2373 tcg_temp_free_i32(tmp);
2374 }
2375 tcg_gen_mov_f64(QREG_FP_RESULT, res);
2376 if (set_dest) {
2377 tcg_gen_mov_f64(dest, res);
2378 }
2379 tcg_temp_free_i64(res);
2380 return;
2381 undef:
2382 /* FIXME: Is this right for offset addressing modes? */
2383 s->pc -= 2;
2384 disas_undef_fpu(s, insn);
2385 }
2386
2387 DISAS_INSN(fbcc)
2388 {
2389 uint32_t offset;
2390 uint32_t addr;
2391 TCGv flag;
2392 int l1;
2393
2394 addr = s->pc;
2395 offset = ldsw_code(s->pc);
2396 s->pc += 2;
2397 if (insn & (1 << 6)) {
2398 offset = (offset << 16) | lduw_code(s->pc);
2399 s->pc += 2;
2400 }
2401
2402 l1 = gen_new_label();
2403 /* TODO: Raise BSUN exception. */
2404 flag = tcg_temp_new();
2405 gen_helper_compare_f64(flag, cpu_env, QREG_FP_RESULT);
2406 /* Jump to l1 if condition is true. */
2407 switch (insn & 0xf) {
2408 case 0: /* f */
2409 break;
2410 case 1: /* eq (=0) */
2411 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
2412 break;
2413 case 2: /* ogt (=1) */
2414 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(1), l1);
2415 break;
2416 case 3: /* oge (=0 or =1) */
2417 tcg_gen_brcond_i32(TCG_COND_LEU, flag, tcg_const_i32(1), l1);
2418 break;
2419 case 4: /* olt (=-1) */
2420 tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(0), l1);
2421 break;
2422 case 5: /* ole (=-1 or =0) */
2423 tcg_gen_brcond_i32(TCG_COND_LE, flag, tcg_const_i32(0), l1);
2424 break;
2425 case 6: /* ogl (=-1 or =1) */
2426 tcg_gen_andi_i32(flag, flag, 1);
2427 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
2428 break;
2429 case 7: /* or (=2) */
2430 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(2), l1);
2431 break;
2432 case 8: /* un (<2) */
2433 tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(2), l1);
2434 break;
2435 case 9: /* ueq (=0 or =2) */
2436 tcg_gen_andi_i32(flag, flag, 1);
2437 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
2438 break;
2439 case 10: /* ugt (>0) */
2440 tcg_gen_brcond_i32(TCG_COND_GT, flag, tcg_const_i32(0), l1);
2441 break;
2442 case 11: /* uge (>=0) */
2443 tcg_gen_brcond_i32(TCG_COND_GE, flag, tcg_const_i32(0), l1);
2444 break;
2445 case 12: /* ult (=-1 or =2) */
2446 tcg_gen_brcond_i32(TCG_COND_GEU, flag, tcg_const_i32(2), l1);
2447 break;
2448 case 13: /* ule (!=1) */
2449 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(1), l1);
2450 break;
2451 case 14: /* ne (!=0) */
2452 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
2453 break;
2454 case 15: /* t */
2455 tcg_gen_br(l1);
2456 break;
2457 }
2458 gen_jmp_tb(s, 0, s->pc);
2459 gen_set_label(l1);
2460 gen_jmp_tb(s, 1, addr + offset);
2461 }
2462
2463 DISAS_INSN(frestore)
2464 {
2465 /* TODO: Implement frestore. */
2466 qemu_assert(0, "FRESTORE not implemented");
2467 }
2468
2469 DISAS_INSN(fsave)
2470 {
2471 /* TODO: Implement fsave. */
2472 qemu_assert(0, "FSAVE not implemented");
2473 }
2474
2475 static inline TCGv gen_mac_extract_word(DisasContext *s, TCGv val, int upper)
2476 {
2477 TCGv tmp = tcg_temp_new();
2478 if (s->env->macsr & MACSR_FI) {
2479 if (upper)
2480 tcg_gen_andi_i32(tmp, val, 0xffff0000);
2481 else
2482 tcg_gen_shli_i32(tmp, val, 16);
2483 } else if (s->env->macsr & MACSR_SU) {
2484 if (upper)
2485 tcg_gen_sari_i32(tmp, val, 16);
2486 else
2487 tcg_gen_ext16s_i32(tmp, val);
2488 } else {
2489 if (upper)
2490 tcg_gen_shri_i32(tmp, val, 16);
2491 else
2492 tcg_gen_ext16u_i32(tmp, val);
2493 }
2494 return tmp;
2495 }
2496
2497 static void gen_mac_clear_flags(void)
2498 {
2499 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR,
2500 ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV));
2501 }
2502
2503 DISAS_INSN(mac)
2504 {
2505 TCGv rx;
2506 TCGv ry;
2507 uint16_t ext;
2508 int acc;
2509 TCGv tmp;
2510 TCGv addr;
2511 TCGv loadval;
2512 int dual;
2513 TCGv saved_flags;
2514
2515 if (!s->done_mac) {
2516 s->mactmp = tcg_temp_new_i64();
2517 s->done_mac = 1;
2518 }
2519
2520 ext = lduw_code(s->pc);
2521 s->pc += 2;
2522
2523 acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
2524 dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
2525 if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) {
2526 disas_undef(s, insn);
2527 return;
2528 }
2529 if (insn & 0x30) {
2530 /* MAC with load. */
2531 tmp = gen_lea(s, insn, OS_LONG);
2532 addr = tcg_temp_new();
2533 tcg_gen_and_i32(addr, tmp, QREG_MAC_MASK);
2534 /* Load the value now to ensure correct exception behavior.
2535 Perform writeback after reading the MAC inputs. */
2536 loadval = gen_load(s, OS_LONG, addr, 0);
2537
2538 acc ^= 1;
2539 rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
2540 ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
2541 } else {
2542 loadval = addr = NULL_QREG;
2543 rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2544 ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2545 }
2546
2547 gen_mac_clear_flags();
2548 #if 0
2549 l1 = -1;
2550 /* Disabled because conditional branches clobber temporary vars. */
2551 if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
2552 /* Skip the multiply if we know we will ignore it. */
2553 l1 = gen_new_label();
2554 tmp = tcg_temp_new();
2555 tcg_gen_andi_i32(tmp, QREG_MACSR, 1 << (acc + 8));
2556 gen_op_jmp_nz32(tmp, l1);
2557 }
2558 #endif
2559
2560 if ((ext & 0x0800) == 0) {
2561 /* Word. */
2562 rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
2563 ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
2564 }
2565 if (s->env->macsr & MACSR_FI) {
2566 gen_helper_macmulf(s->mactmp, cpu_env, rx, ry);
2567 } else {
2568 if (s->env->macsr & MACSR_SU)
2569 gen_helper_macmuls(s->mactmp, cpu_env, rx, ry);
2570 else
2571 gen_helper_macmulu(s->mactmp, cpu_env, rx, ry);
2572 switch ((ext >> 9) & 3) {
2573 case 1:
2574 tcg_gen_shli_i64(s->mactmp, s->mactmp, 1);
2575 break;
2576 case 3:
2577 tcg_gen_shri_i64(s->mactmp, s->mactmp, 1);
2578 break;
2579 }
2580 }
2581
2582 if (dual) {
2583 /* Save the overflow flag from the multiply. */
2584 saved_flags = tcg_temp_new();
2585 tcg_gen_mov_i32(saved_flags, QREG_MACSR);
2586 } else {
2587 saved_flags = NULL_QREG;
2588 }
2589
2590 #if 0
2591 /* Disabled because conditional branches clobber temporary vars. */
2592 if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
2593 /* Skip the accumulate if the value is already saturated. */
2594 l1 = gen_new_label();
2595 tmp = tcg_temp_new();
2596 gen_op_and32(tmp, QREG_MACSR, gen_im32(MACSR_PAV0 << acc));
2597 gen_op_jmp_nz32(tmp, l1);
2598 }
2599 #endif
2600
2601 if (insn & 0x100)
2602 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
2603 else
2604 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
2605
2606 if (s->env->macsr & MACSR_FI)
2607 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
2608 else if (s->env->macsr & MACSR_SU)
2609 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
2610 else
2611 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
2612
2613 #if 0
2614 /* Disabled because conditional branches clobber temporary vars. */
2615 if (l1 != -1)
2616 gen_set_label(l1);
2617 #endif
2618
2619 if (dual) {
2620 /* Dual accumulate variant. */
2621 acc = (ext >> 2) & 3;
2622 /* Restore the overflow flag from the multiplier. */
2623 tcg_gen_mov_i32(QREG_MACSR, saved_flags);
2624 #if 0
2625 /* Disabled because conditional branches clobber temporary vars. */
2626 if ((s->env->macsr & MACSR_OMC) != 0) {
2627 /* Skip the accumulate if the value is already saturated. */
2628 l1 = gen_new_label();
2629 tmp = tcg_temp_new();
2630 gen_op_and32(tmp, QREG_MACSR, gen_im32(MACSR_PAV0 << acc));
2631 gen_op_jmp_nz32(tmp, l1);
2632 }
2633 #endif
2634 if (ext & 2)
2635 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
2636 else
2637 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
2638 if (s->env->macsr & MACSR_FI)
2639 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
2640 else if (s->env->macsr & MACSR_SU)
2641 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
2642 else
2643 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
2644 #if 0
2645 /* Disabled because conditional branches clobber temporary vars. */
2646 if (l1 != -1)
2647 gen_set_label(l1);
2648 #endif
2649 }
2650 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(acc));
2651
2652 if (insn & 0x30) {
2653 TCGv rw;
2654 rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2655 tcg_gen_mov_i32(rw, loadval);
2656 /* FIXME: Should address writeback happen with the masked or
2657 unmasked value? */
2658 switch ((insn >> 3) & 7) {
2659 case 3: /* Post-increment. */
2660 tcg_gen_addi_i32(AREG(insn, 0), addr, 4);
2661 break;
2662 case 4: /* Pre-decrement. */
2663 tcg_gen_mov_i32(AREG(insn, 0), addr);
2664 }
2665 }
2666 }
2667
2668 DISAS_INSN(from_mac)
2669 {
2670 TCGv rx;
2671 TCGv_i64 acc;
2672 int accnum;
2673
2674 rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2675 accnum = (insn >> 9) & 3;
2676 acc = MACREG(accnum);
2677 if (s->env->macsr & MACSR_FI) {
2678 gen_helper_get_macf(rx, cpu_env, acc);
2679 } else if ((s->env->macsr & MACSR_OMC) == 0) {
2680 tcg_gen_trunc_i64_i32(rx, acc);
2681 } else if (s->env->macsr & MACSR_SU) {
2682 gen_helper_get_macs(rx, acc);
2683 } else {
2684 gen_helper_get_macu(rx, acc);
2685 }
2686 if (insn & 0x40) {
2687 tcg_gen_movi_i64(acc, 0);
2688 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
2689 }
2690 }
2691
2692 DISAS_INSN(move_mac)
2693 {
2694 /* FIXME: This can be done without a helper. */
2695 int src;
2696 TCGv dest;
2697 src = insn & 3;
2698 dest = tcg_const_i32((insn >> 9) & 3);
2699 gen_helper_mac_move(cpu_env, dest, tcg_const_i32(src));
2700 gen_mac_clear_flags();
2701 gen_helper_mac_set_flags(cpu_env, dest);
2702 }
2703
2704 DISAS_INSN(from_macsr)
2705 {
2706 TCGv reg;
2707
2708 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2709 tcg_gen_mov_i32(reg, QREG_MACSR);
2710 }
2711
2712 DISAS_INSN(from_mask)
2713 {
2714 TCGv reg;
2715 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2716 tcg_gen_mov_i32(reg, QREG_MAC_MASK);
2717 }
2718
2719 DISAS_INSN(from_mext)
2720 {
2721 TCGv reg;
2722 TCGv acc;
2723 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2724 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
2725 if (s->env->macsr & MACSR_FI)
2726 gen_helper_get_mac_extf(reg, cpu_env, acc);
2727 else
2728 gen_helper_get_mac_exti(reg, cpu_env, acc);
2729 }
2730
2731 DISAS_INSN(macsr_to_ccr)
2732 {
2733 tcg_gen_movi_i32(QREG_CC_X, 0);
2734 tcg_gen_andi_i32(QREG_CC_DEST, QREG_MACSR, 0xf);
2735 s->cc_op = CC_OP_FLAGS;
2736 }
2737
2738 DISAS_INSN(to_mac)
2739 {
2740 TCGv_i64 acc;
2741 TCGv val;
2742 int accnum;
2743 accnum = (insn >> 9) & 3;
2744 acc = MACREG(accnum);
2745 SRC_EA(val, OS_LONG, 0, NULL);
2746 if (s->env->macsr & MACSR_FI) {
2747 tcg_gen_ext_i32_i64(acc, val);
2748 tcg_gen_shli_i64(acc, acc, 8);
2749 } else if (s->env->macsr & MACSR_SU) {
2750 tcg_gen_ext_i32_i64(acc, val);
2751 } else {
2752 tcg_gen_extu_i32_i64(acc, val);
2753 }
2754 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
2755 gen_mac_clear_flags();
2756 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(accnum));
2757 }
2758
2759 DISAS_INSN(to_macsr)
2760 {
2761 TCGv val;
2762 SRC_EA(val, OS_LONG, 0, NULL);
2763 gen_helper_set_macsr(cpu_env, val);
2764 gen_lookup_tb(s);
2765 }
2766
2767 DISAS_INSN(to_mask)
2768 {
2769 TCGv val;
2770 SRC_EA(val, OS_LONG, 0, NULL);
2771 tcg_gen_ori_i32(QREG_MAC_MASK, val, 0xffff0000);
2772 }
2773
2774 DISAS_INSN(to_mext)
2775 {
2776 TCGv val;
2777 TCGv acc;
2778 SRC_EA(val, OS_LONG, 0, NULL);
2779 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
2780 if (s->env->macsr & MACSR_FI)
2781 gen_helper_set_mac_extf(cpu_env, val, acc);
2782 else if (s->env->macsr & MACSR_SU)
2783 gen_helper_set_mac_exts(cpu_env, val, acc);
2784 else
2785 gen_helper_set_mac_extu(cpu_env, val, acc);
2786 }
2787
2788 static disas_proc opcode_table[65536];
2789
2790 static void
2791 register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
2792 {
2793 int i;
2794 int from;
2795 int to;
2796
2797 /* Sanity check. All set bits must be included in the mask. */
2798 if (opcode & ~mask) {
2799 fprintf(stderr,
2800 "qemu internal error: bogus opcode definition %04x/%04x\n",
2801 opcode, mask);
2802 abort();
2803 }
2804 /* This could probably be cleverer. For now just optimize the case where
2805 the top bits are known. */
2806 /* Find the first zero bit in the mask. */
2807 i = 0x8000;
2808 while ((i & mask) != 0)
2809 i >>= 1;
2810 /* Iterate over all combinations of this and lower bits. */
2811 if (i == 0)
2812 i = 1;
2813 else
2814 i <<= 1;
2815 from = opcode & ~(i - 1);
2816 to = from + i;
2817 for (i = from; i < to; i++) {
2818 if ((i & mask) == opcode)
2819 opcode_table[i] = proc;
2820 }
2821 }
2822
2823 /* Register m68k opcode handlers. Order is important.
2824 Later insn override earlier ones. */
2825 void register_m68k_insns (CPUM68KState *env)
2826 {
2827 #define INSN(name, opcode, mask, feature) do { \
2828 if (m68k_feature(env, M68K_FEATURE_##feature)) \
2829 register_opcode(disas_##name, 0x##opcode, 0x##mask); \
2830 } while(0)
2831 INSN(undef, 0000, 0000, CF_ISA_A);
2832 INSN(arith_im, 0080, fff8, CF_ISA_A);
2833 INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
2834 INSN(bitop_reg, 0100, f1c0, CF_ISA_A);
2835 INSN(bitop_reg, 0140, f1c0, CF_ISA_A);
2836 INSN(bitop_reg, 0180, f1c0, CF_ISA_A);
2837 INSN(bitop_reg, 01c0, f1c0, CF_ISA_A);
2838 INSN(arith_im, 0280, fff8, CF_ISA_A);
2839 INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
2840 INSN(arith_im, 0480, fff8, CF_ISA_A);
2841 INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
2842 INSN(arith_im, 0680, fff8, CF_ISA_A);
2843 INSN(bitop_im, 0800, ffc0, CF_ISA_A);
2844 INSN(bitop_im, 0840, ffc0, CF_ISA_A);
2845 INSN(bitop_im, 0880, ffc0, CF_ISA_A);
2846 INSN(bitop_im, 08c0, ffc0, CF_ISA_A);
2847 INSN(arith_im, 0a80, fff8, CF_ISA_A);
2848 INSN(arith_im, 0c00, ff38, CF_ISA_A);
2849 INSN(move, 1000, f000, CF_ISA_A);
2850 INSN(move, 2000, f000, CF_ISA_A);
2851 INSN(move, 3000, f000, CF_ISA_A);
2852 INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC);
2853 INSN(negx, 4080, fff8, CF_ISA_A);
2854 INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
2855 INSN(lea, 41c0, f1c0, CF_ISA_A);
2856 INSN(clr, 4200, ff00, CF_ISA_A);
2857 INSN(undef, 42c0, ffc0, CF_ISA_A);
2858 INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
2859 INSN(neg, 4480, fff8, CF_ISA_A);
2860 INSN(move_to_ccr, 44c0, ffc0, CF_ISA_A);
2861 INSN(not, 4680, fff8, CF_ISA_A);
2862 INSN(move_to_sr, 46c0, ffc0, CF_ISA_A);
2863 INSN(pea, 4840, ffc0, CF_ISA_A);
2864 INSN(swap, 4840, fff8, CF_ISA_A);
2865 INSN(movem, 48c0, fbc0, CF_ISA_A);
2866 INSN(ext, 4880, fff8, CF_ISA_A);
2867 INSN(ext, 48c0, fff8, CF_ISA_A);
2868 INSN(ext, 49c0, fff8, CF_ISA_A);
2869 INSN(tst, 4a00, ff00, CF_ISA_A);
2870 INSN(tas, 4ac0, ffc0, CF_ISA_B);
2871 INSN(halt, 4ac8, ffff, CF_ISA_A);
2872 INSN(pulse, 4acc, ffff, CF_ISA_A);
2873 INSN(illegal, 4afc, ffff, CF_ISA_A);
2874 INSN(mull, 4c00, ffc0, CF_ISA_A);
2875 INSN(divl, 4c40, ffc0, CF_ISA_A);
2876 INSN(sats, 4c80, fff8, CF_ISA_B);
2877 INSN(trap, 4e40, fff0, CF_ISA_A);
2878 INSN(link, 4e50, fff8, CF_ISA_A);
2879 INSN(unlk, 4e58, fff8, CF_ISA_A);
2880 INSN(move_to_usp, 4e60, fff8, USP);
2881 INSN(move_from_usp, 4e68, fff8, USP);
2882 INSN(nop, 4e71, ffff, CF_ISA_A);
2883 INSN(stop, 4e72, ffff, CF_ISA_A);
2884 INSN(rte, 4e73, ffff, CF_ISA_A);
2885 INSN(rts, 4e75, ffff, CF_ISA_A);
2886 INSN(movec, 4e7b, ffff, CF_ISA_A);
2887 INSN(jump, 4e80, ffc0, CF_ISA_A);
2888 INSN(jump, 4ec0, ffc0, CF_ISA_A);
2889 INSN(addsubq, 5180, f1c0, CF_ISA_A);
2890 INSN(scc, 50c0, f0f8, CF_ISA_A);
2891 INSN(addsubq, 5080, f1c0, CF_ISA_A);
2892 INSN(tpf, 51f8, fff8, CF_ISA_A);
2893
2894 /* Branch instructions. */
2895 INSN(branch, 6000, f000, CF_ISA_A);
2896 /* Disable long branch instructions, then add back the ones we want. */
2897 INSN(undef, 60ff, f0ff, CF_ISA_A); /* All long branches. */
2898 INSN(branch, 60ff, f0ff, CF_ISA_B);
2899 INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */
2900 INSN(branch, 60ff, ffff, BRAL);
2901
2902 INSN(moveq, 7000, f100, CF_ISA_A);
2903 INSN(mvzs, 7100, f100, CF_ISA_B);
2904 INSN(or, 8000, f000, CF_ISA_A);
2905 INSN(divw, 80c0, f0c0, CF_ISA_A);
2906 INSN(addsub, 9000, f000, CF_ISA_A);
2907 INSN(subx, 9180, f1f8, CF_ISA_A);
2908 INSN(suba, 91c0, f1c0, CF_ISA_A);
2909
2910 INSN(undef_mac, a000, f000, CF_ISA_A);
2911 INSN(mac, a000, f100, CF_EMAC);
2912 INSN(from_mac, a180, f9b0, CF_EMAC);
2913 INSN(move_mac, a110, f9fc, CF_EMAC);
2914 INSN(from_macsr,a980, f9f0, CF_EMAC);
2915 INSN(from_mask, ad80, fff0, CF_EMAC);
2916 INSN(from_mext, ab80, fbf0, CF_EMAC);
2917 INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
2918 INSN(to_mac, a100, f9c0, CF_EMAC);
2919 INSN(to_macsr, a900, ffc0, CF_EMAC);
2920 INSN(to_mext, ab00, fbc0, CF_EMAC);
2921 INSN(to_mask, ad00, ffc0, CF_EMAC);
2922
2923 INSN(mov3q, a140, f1c0, CF_ISA_B);
2924 INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
2925 INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
2926 INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
2927 INSN(cmp, b080, f1c0, CF_ISA_A);
2928 INSN(cmpa, b1c0, f1c0, CF_ISA_A);
2929 INSN(eor, b180, f1c0, CF_ISA_A);
2930 INSN(and, c000, f000, CF_ISA_A);
2931 INSN(mulw, c0c0, f0c0, CF_ISA_A);
2932 INSN(addsub, d000, f000, CF_ISA_A);
2933 INSN(addx, d180, f1f8, CF_ISA_A);
2934 INSN(adda, d1c0, f1c0, CF_ISA_A);
2935 INSN(shift_im, e080, f0f0, CF_ISA_A);
2936 INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
2937 INSN(undef_fpu, f000, f000, CF_ISA_A);
2938 INSN(fpu, f200, ffc0, CF_FPU);
2939 INSN(fbcc, f280, ffc0, CF_FPU);
2940 INSN(frestore, f340, ffc0, CF_FPU);
2941 INSN(fsave, f340, ffc0, CF_FPU);
2942 INSN(intouch, f340, ffc0, CF_ISA_A);
2943 INSN(cpushl, f428, ff38, CF_ISA_A);
2944 INSN(wddata, fb00, ff00, CF_ISA_A);
2945 INSN(wdebug, fbc0, ffc0, CF_ISA_A);
2946 #undef INSN
2947 }
2948
2949 /* ??? Some of this implementation is not exception safe. We should always
2950 write back the result to memory before setting the condition codes. */
2951 static void disas_m68k_insn(CPUState * env, DisasContext *s)
2952 {
2953 uint16_t insn;
2954
2955 insn = lduw_code(s->pc);
2956 s->pc += 2;
2957
2958 opcode_table[insn](s, insn);
2959 }
2960
2961 /* generate intermediate code for basic block 'tb'. */
2962 static inline void
2963 gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
2964 int search_pc)
2965 {
2966 DisasContext dc1, *dc = &dc1;
2967 uint16_t *gen_opc_end;
2968 CPUBreakpoint *bp;
2969 int j, lj;
2970 target_ulong pc_start;
2971 int pc_offset;
2972 int last_cc_op;
2973 int num_insns;
2974 int max_insns;
2975
2976 /* generate intermediate code */
2977 pc_start = tb->pc;
2978
2979 dc->tb = tb;
2980
2981 gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
2982
2983 dc->env = env;
2984 dc->is_jmp = DISAS_NEXT;
2985 dc->pc = pc_start;
2986 dc->cc_op = CC_OP_DYNAMIC;
2987 dc->singlestep_enabled = env->singlestep_enabled;
2988 dc->fpcr = env->fpcr;
2989 dc->user = (env->sr & SR_S) == 0;
2990 dc->is_mem = 0;
2991 dc->done_mac = 0;
2992 lj = -1;
2993 num_insns = 0;
2994 max_insns = tb->cflags & CF_COUNT_MASK;
2995 if (max_insns == 0)
2996 max_insns = CF_COUNT_MASK;
2997
2998 gen_icount_start();
2999 do {
3000 pc_offset = dc->pc - pc_start;
3001 gen_throws_exception = NULL;
3002 if (unlikely(!TAILQ_EMPTY(&env->breakpoints))) {
3003 TAILQ_FOREACH(bp, &env->breakpoints, entry) {
3004 if (bp->pc == dc->pc) {
3005 gen_exception(dc, dc->pc, EXCP_DEBUG);
3006 dc->is_jmp = DISAS_JUMP;
3007 break;
3008 }
3009 }
3010 if (dc->is_jmp)
3011 break;
3012 }
3013 if (search_pc) {
3014 j = gen_opc_ptr - gen_opc_buf;
3015 if (lj < j) {
3016 lj++;
3017 while (lj < j)
3018 gen_opc_instr_start[lj++] = 0;
3019 }
3020 gen_opc_pc[lj] = dc->pc;
3021 gen_opc_instr_start[lj] = 1;
3022 gen_opc_icount[lj] = num_insns;
3023 }
3024 if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
3025 gen_io_start();
3026 last_cc_op = dc->cc_op;
3027 dc->insn_pc = dc->pc;
3028 disas_m68k_insn(env, dc);
3029 num_insns++;
3030 } while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
3031 !env->singlestep_enabled &&
3032 (pc_offset) < (TARGET_PAGE_SIZE - 32) &&
3033 num_insns < max_insns);
3034
3035 if (tb->cflags & CF_LAST_IO)
3036 gen_io_end();
3037 if (unlikely(env->singlestep_enabled)) {
3038 /* Make sure the pc is updated, and raise a debug exception. */
3039 if (!dc->is_jmp) {
3040 gen_flush_cc_op(dc);
3041 tcg_gen_movi_i32(QREG_PC, dc->pc);
3042 }
3043 gen_helper_raise_exception(tcg_const_i32(EXCP_DEBUG));
3044 } else {
3045 switch(dc->is_jmp) {
3046 case DISAS_NEXT:
3047 gen_flush_cc_op(dc);
3048 gen_jmp_tb(dc, 0, dc->pc);
3049 break;
3050 default:
3051 case DISAS_JUMP:
3052 case DISAS_UPDATE:
3053 gen_flush_cc_op(dc);
3054 /* indicate that the hash table must be used to find the next TB */
3055 tcg_gen_exit_tb(0);
3056 break;
3057 case DISAS_TB_JUMP:
3058 /* nothing more to generate */
3059 break;
3060 }
3061 }
3062 gen_icount_end(tb, num_insns);
3063 *gen_opc_ptr = INDEX_op_end;
3064
3065 #ifdef DEBUG_DISAS
3066 if (loglevel & CPU_LOG_TB_IN_ASM) {
3067 fprintf(logfile, "----------------\n");
3068 fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
3069 target_disas(logfile, pc_start, dc->pc - pc_start, 0);
3070 fprintf(logfile, "\n");
3071 }
3072 #endif
3073 if (search_pc) {
3074 j = gen_opc_ptr - gen_opc_buf;
3075 lj++;
3076 while (lj <= j)
3077 gen_opc_instr_start[lj++] = 0;
3078 } else {
3079 tb->size = dc->pc - pc_start;
3080 tb->icount = num_insns;
3081 }
3082
3083 //optimize_flags();
3084 //expand_target_qops();
3085 }
3086
3087 void gen_intermediate_code(CPUState *env, TranslationBlock *tb)
3088 {
3089 gen_intermediate_code_internal(env, tb, 0);
3090 }
3091
3092 void gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb)
3093 {
3094 gen_intermediate_code_internal(env, tb, 1);
3095 }
3096
3097 void cpu_dump_state(CPUState *env, FILE *f,
3098 int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
3099 int flags)
3100 {
3101 int i;
3102 uint16_t sr;
3103 CPU_DoubleU u;
3104 for (i = 0; i < 8; i++)
3105 {
3106 u.d = env->fregs[i];
3107 cpu_fprintf (f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n",
3108 i, env->dregs[i], i, env->aregs[i],
3109 i, u.l.upper, u.l.lower, *(double *)&u.d);
3110 }
3111 cpu_fprintf (f, "PC = %08x ", env->pc);
3112 sr = env->sr;
3113 cpu_fprintf (f, "SR = %04x %c%c%c%c%c ", sr, (sr & 0x10) ? 'X' : '-',
3114 (sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-',
3115 (sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-');
3116 cpu_fprintf (f, "FPRESULT = %12g\n", *(double *)&env->fp_result);
3117 }
3118
3119 void gen_pc_load(CPUState *env, TranslationBlock *tb,
3120 unsigned long searched_pc, int pc_pos, void *puc)
3121 {
3122 env->pc = gen_opc_pc[pc_pos];
3123 }