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tcg: Fix tcg_reg_alloc_mov vs no-op truncation
[qemu.git] / target-m68k / translate.c
blobcd662891c8961cb24846ddf2afa2ad485d9ff183
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, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "cpu.h"
22 #include "disas/disas.h"
23 #include "tcg-op.h"
24 #include "qemu/log.h"
25
26 #include "helper.h"
27 #define GEN_HELPER 1
28 #include "helper.h"
29
30 //#define DEBUG_DISPATCH 1
31
32 /* Fake floating point. */
33 #define tcg_gen_mov_f64 tcg_gen_mov_i64
34 #define tcg_gen_qemu_ldf64 tcg_gen_qemu_ld64
35 #define tcg_gen_qemu_stf64 tcg_gen_qemu_st64
36
37 #define DEFO32(name, offset) static TCGv QREG_##name;
38 #define DEFO64(name, offset) static TCGv_i64 QREG_##name;
39 #define DEFF64(name, offset) static TCGv_i64 QREG_##name;
40 #include "qregs.def"
41 #undef DEFO32
42 #undef DEFO64
43 #undef DEFF64
44
45 static TCGv_i32 cpu_halted;
46 static TCGv_i32 cpu_exception_index;
47
48 static TCGv_ptr cpu_env;
49
50 static char cpu_reg_names[3*8*3 + 5*4];
51 static TCGv cpu_dregs[8];
52 static TCGv cpu_aregs[8];
53 static TCGv_i64 cpu_fregs[8];
54 static TCGv_i64 cpu_macc[4];
55
56 #define DREG(insn, pos) cpu_dregs[((insn) >> (pos)) & 7]
57 #define AREG(insn, pos) cpu_aregs[((insn) >> (pos)) & 7]
58 #define FREG(insn, pos) cpu_fregs[((insn) >> (pos)) & 7]
59 #define MACREG(acc) cpu_macc[acc]
60 #define QREG_SP cpu_aregs[7]
61
62 static TCGv NULL_QREG;
63 #define IS_NULL_QREG(t) (TCGV_EQUAL(t, NULL_QREG))
64 /* Used to distinguish stores from bad addressing modes. */
65 static TCGv store_dummy;
66
67 #include "exec/gen-icount.h"
68
69 void m68k_tcg_init(void)
70 {
71 char *p;
72 int i;
73
74 #define DEFO32(name, offset) QREG_##name = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUM68KState, offset), #name);
75 #define DEFO64(name, offset) QREG_##name = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUM68KState, offset), #name);
76 #define DEFF64(name, offset) DEFO64(name, offset)
77 #include "qregs.def"
78 #undef DEFO32
79 #undef DEFO64
80 #undef DEFF64
81
82 cpu_halted = tcg_global_mem_new_i32(TCG_AREG0,
83 -offsetof(M68kCPU, env) +
84 offsetof(CPUState, halted), "HALTED");
85 cpu_exception_index = tcg_global_mem_new_i32(TCG_AREG0,
86 -offsetof(M68kCPU, env) +
87 offsetof(CPUState, exception_index),
88 "EXCEPTION");
89
90 cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
91
92 p = cpu_reg_names;
93 for (i = 0; i < 8; i++) {
94 sprintf(p, "D%d", i);
95 cpu_dregs[i] = tcg_global_mem_new(TCG_AREG0,
96 offsetof(CPUM68KState, dregs[i]), p);
97 p += 3;
98 sprintf(p, "A%d", i);
99 cpu_aregs[i] = tcg_global_mem_new(TCG_AREG0,
100 offsetof(CPUM68KState, aregs[i]), p);
101 p += 3;
102 sprintf(p, "F%d", i);
103 cpu_fregs[i] = tcg_global_mem_new_i64(TCG_AREG0,
104 offsetof(CPUM68KState, fregs[i]), p);
105 p += 3;
106 }
107 for (i = 0; i < 4; i++) {
108 sprintf(p, "ACC%d", i);
109 cpu_macc[i] = tcg_global_mem_new_i64(TCG_AREG0,
110 offsetof(CPUM68KState, macc[i]), p);
111 p += 5;
112 }
113
114 NULL_QREG = tcg_global_mem_new(TCG_AREG0, -4, "NULL");
115 store_dummy = tcg_global_mem_new(TCG_AREG0, -8, "NULL");
116 }
117
118 /* internal defines */
119 typedef struct DisasContext {
120 CPUM68KState *env;
121 target_ulong insn_pc; /* Start of the current instruction. */
122 target_ulong pc;
123 int is_jmp;
124 int cc_op;
125 int user;
126 uint32_t fpcr;
127 struct TranslationBlock *tb;
128 int singlestep_enabled;
129 int is_mem;
130 TCGv_i64 mactmp;
131 int done_mac;
132 } DisasContext;
133
134 #define DISAS_JUMP_NEXT 4
135
136 #if defined(CONFIG_USER_ONLY)
137 #define IS_USER(s) 1
138 #else
139 #define IS_USER(s) s->user
140 #endif
141
142 /* XXX: move that elsewhere */
143 /* ??? Fix exceptions. */
144 static void *gen_throws_exception;
145 #define gen_last_qop NULL
146
147 #define OS_BYTE 0
148 #define OS_WORD 1
149 #define OS_LONG 2
150 #define OS_SINGLE 4
151 #define OS_DOUBLE 5
152
153 typedef void (*disas_proc)(CPUM68KState *env, DisasContext *s, uint16_t insn);
154
155 #ifdef DEBUG_DISPATCH
156 #define DISAS_INSN(name) \
157 static void real_disas_##name(CPUM68KState *env, DisasContext *s, \
158 uint16_t insn); \
159 static void disas_##name(CPUM68KState *env, DisasContext *s, \
160 uint16_t insn) \
161 { \
162 qemu_log("Dispatch " #name "\n"); \
163 real_disas_##name(s, env, insn); \
164 } \
165 static void real_disas_##name(CPUM68KState *env, DisasContext *s, \
166 uint16_t insn)
167 #else
168 #define DISAS_INSN(name) \
169 static void disas_##name(CPUM68KState *env, DisasContext *s, \
170 uint16_t insn)
171 #endif
172
173 /* Generate a load from the specified address. Narrow values are
174 sign extended to full register width. */
175 static inline TCGv gen_load(DisasContext * s, int opsize, TCGv addr, int sign)
176 {
177 TCGv tmp;
178 int index = IS_USER(s);
179 s->is_mem = 1;
180 tmp = tcg_temp_new_i32();
181 switch(opsize) {
182 case OS_BYTE:
183 if (sign)
184 tcg_gen_qemu_ld8s(tmp, addr, index);
185 else
186 tcg_gen_qemu_ld8u(tmp, addr, index);
187 break;
188 case OS_WORD:
189 if (sign)
190 tcg_gen_qemu_ld16s(tmp, addr, index);
191 else
192 tcg_gen_qemu_ld16u(tmp, addr, index);
193 break;
194 case OS_LONG:
195 case OS_SINGLE:
196 tcg_gen_qemu_ld32u(tmp, addr, index);
197 break;
198 default:
199 g_assert_not_reached();
200 }
201 gen_throws_exception = gen_last_qop;
202 return tmp;
203 }
204
205 static inline TCGv_i64 gen_load64(DisasContext * s, TCGv addr)
206 {
207 TCGv_i64 tmp;
208 int index = IS_USER(s);
209 s->is_mem = 1;
210 tmp = tcg_temp_new_i64();
211 tcg_gen_qemu_ldf64(tmp, addr, index);
212 gen_throws_exception = gen_last_qop;
213 return tmp;
214 }
215
216 /* Generate a store. */
217 static inline void gen_store(DisasContext *s, int opsize, TCGv addr, TCGv val)
218 {
219 int index = IS_USER(s);
220 s->is_mem = 1;
221 switch(opsize) {
222 case OS_BYTE:
223 tcg_gen_qemu_st8(val, addr, index);
224 break;
225 case OS_WORD:
226 tcg_gen_qemu_st16(val, addr, index);
227 break;
228 case OS_LONG:
229 case OS_SINGLE:
230 tcg_gen_qemu_st32(val, addr, index);
231 break;
232 default:
233 g_assert_not_reached();
234 }
235 gen_throws_exception = gen_last_qop;
236 }
237
238 static inline void gen_store64(DisasContext *s, TCGv addr, TCGv_i64 val)
239 {
240 int index = IS_USER(s);
241 s->is_mem = 1;
242 tcg_gen_qemu_stf64(val, addr, index);
243 gen_throws_exception = gen_last_qop;
244 }
245
246 typedef enum {
247 EA_STORE,
248 EA_LOADU,
249 EA_LOADS
250 } ea_what;
251
252 /* Generate an unsigned load if VAL is 0 a signed load if val is -1,
253 otherwise generate a store. */
254 static TCGv gen_ldst(DisasContext *s, int opsize, TCGv addr, TCGv val,
255 ea_what what)
256 {
257 if (what == EA_STORE) {
258 gen_store(s, opsize, addr, val);
259 return store_dummy;
260 } else {
261 return gen_load(s, opsize, addr, what == EA_LOADS);
262 }
263 }
264
265 /* Read a 32-bit immediate constant. */
266 static inline uint32_t read_im32(CPUM68KState *env, DisasContext *s)
267 {
268 uint32_t im;
269 im = ((uint32_t)cpu_lduw_code(env, s->pc)) << 16;
270 s->pc += 2;
271 im |= cpu_lduw_code(env, s->pc);
272 s->pc += 2;
273 return im;
274 }
275
276 /* Calculate and address index. */
277 static TCGv gen_addr_index(uint16_t ext, TCGv tmp)
278 {
279 TCGv add;
280 int scale;
281
282 add = (ext & 0x8000) ? AREG(ext, 12) : DREG(ext, 12);
283 if ((ext & 0x800) == 0) {
284 tcg_gen_ext16s_i32(tmp, add);
285 add = tmp;
286 }
287 scale = (ext >> 9) & 3;
288 if (scale != 0) {
289 tcg_gen_shli_i32(tmp, add, scale);
290 add = tmp;
291 }
292 return add;
293 }
294
295 /* Handle a base + index + displacement effective addresss.
296 A NULL_QREG base means pc-relative. */
297 static TCGv gen_lea_indexed(CPUM68KState *env, DisasContext *s, int opsize,
298 TCGv base)
299 {
300 uint32_t offset;
301 uint16_t ext;
302 TCGv add;
303 TCGv tmp;
304 uint32_t bd, od;
305
306 offset = s->pc;
307 ext = cpu_lduw_code(env, s->pc);
308 s->pc += 2;
309
310 if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX))
311 return NULL_QREG;
312
313 if (ext & 0x100) {
314 /* full extension word format */
315 if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL))
316 return NULL_QREG;
317
318 if ((ext & 0x30) > 0x10) {
319 /* base displacement */
320 if ((ext & 0x30) == 0x20) {
321 bd = (int16_t)cpu_lduw_code(env, s->pc);
322 s->pc += 2;
323 } else {
324 bd = read_im32(env, s);
325 }
326 } else {
327 bd = 0;
328 }
329 tmp = tcg_temp_new();
330 if ((ext & 0x44) == 0) {
331 /* pre-index */
332 add = gen_addr_index(ext, tmp);
333 } else {
334 add = NULL_QREG;
335 }
336 if ((ext & 0x80) == 0) {
337 /* base not suppressed */
338 if (IS_NULL_QREG(base)) {
339 base = tcg_const_i32(offset + bd);
340 bd = 0;
341 }
342 if (!IS_NULL_QREG(add)) {
343 tcg_gen_add_i32(tmp, add, base);
344 add = tmp;
345 } else {
346 add = base;
347 }
348 }
349 if (!IS_NULL_QREG(add)) {
350 if (bd != 0) {
351 tcg_gen_addi_i32(tmp, add, bd);
352 add = tmp;
353 }
354 } else {
355 add = tcg_const_i32(bd);
356 }
357 if ((ext & 3) != 0) {
358 /* memory indirect */
359 base = gen_load(s, OS_LONG, add, 0);
360 if ((ext & 0x44) == 4) {
361 add = gen_addr_index(ext, tmp);
362 tcg_gen_add_i32(tmp, add, base);
363 add = tmp;
364 } else {
365 add = base;
366 }
367 if ((ext & 3) > 1) {
368 /* outer displacement */
369 if ((ext & 3) == 2) {
370 od = (int16_t)cpu_lduw_code(env, s->pc);
371 s->pc += 2;
372 } else {
373 od = read_im32(env, s);
374 }
375 } else {
376 od = 0;
377 }
378 if (od != 0) {
379 tcg_gen_addi_i32(tmp, add, od);
380 add = tmp;
381 }
382 }
383 } else {
384 /* brief extension word format */
385 tmp = tcg_temp_new();
386 add = gen_addr_index(ext, tmp);
387 if (!IS_NULL_QREG(base)) {
388 tcg_gen_add_i32(tmp, add, base);
389 if ((int8_t)ext)
390 tcg_gen_addi_i32(tmp, tmp, (int8_t)ext);
391 } else {
392 tcg_gen_addi_i32(tmp, add, offset + (int8_t)ext);
393 }
394 add = tmp;
395 }
396 return add;
397 }
398
399 /* Update the CPU env CC_OP state. */
400 static inline void gen_flush_cc_op(DisasContext *s)
401 {
402 if (s->cc_op != CC_OP_DYNAMIC)
403 tcg_gen_movi_i32(QREG_CC_OP, s->cc_op);
404 }
405
406 /* Evaluate all the CC flags. */
407 static inline void gen_flush_flags(DisasContext *s)
408 {
409 if (s->cc_op == CC_OP_FLAGS)
410 return;
411 gen_flush_cc_op(s);
412 gen_helper_flush_flags(cpu_env, QREG_CC_OP);
413 s->cc_op = CC_OP_FLAGS;
414 }
415
416 static void gen_logic_cc(DisasContext *s, TCGv val)
417 {
418 tcg_gen_mov_i32(QREG_CC_DEST, val);
419 s->cc_op = CC_OP_LOGIC;
420 }
421
422 static void gen_update_cc_add(TCGv dest, TCGv src)
423 {
424 tcg_gen_mov_i32(QREG_CC_DEST, dest);
425 tcg_gen_mov_i32(QREG_CC_SRC, src);
426 }
427
428 static inline int opsize_bytes(int opsize)
429 {
430 switch (opsize) {
431 case OS_BYTE: return 1;
432 case OS_WORD: return 2;
433 case OS_LONG: return 4;
434 case OS_SINGLE: return 4;
435 case OS_DOUBLE: return 8;
436 default:
437 g_assert_not_reached();
438 }
439 }
440
441 /* Assign value to a register. If the width is less than the register width
442 only the low part of the register is set. */
443 static void gen_partset_reg(int opsize, TCGv reg, TCGv val)
444 {
445 TCGv tmp;
446 switch (opsize) {
447 case OS_BYTE:
448 tcg_gen_andi_i32(reg, reg, 0xffffff00);
449 tmp = tcg_temp_new();
450 tcg_gen_ext8u_i32(tmp, val);
451 tcg_gen_or_i32(reg, reg, tmp);
452 break;
453 case OS_WORD:
454 tcg_gen_andi_i32(reg, reg, 0xffff0000);
455 tmp = tcg_temp_new();
456 tcg_gen_ext16u_i32(tmp, val);
457 tcg_gen_or_i32(reg, reg, tmp);
458 break;
459 case OS_LONG:
460 case OS_SINGLE:
461 tcg_gen_mov_i32(reg, val);
462 break;
463 default:
464 g_assert_not_reached();
465 }
466 }
467
468 /* Sign or zero extend a value. */
469 static inline TCGv gen_extend(TCGv val, int opsize, int sign)
470 {
471 TCGv tmp;
472
473 switch (opsize) {
474 case OS_BYTE:
475 tmp = tcg_temp_new();
476 if (sign)
477 tcg_gen_ext8s_i32(tmp, val);
478 else
479 tcg_gen_ext8u_i32(tmp, val);
480 break;
481 case OS_WORD:
482 tmp = tcg_temp_new();
483 if (sign)
484 tcg_gen_ext16s_i32(tmp, val);
485 else
486 tcg_gen_ext16u_i32(tmp, val);
487 break;
488 case OS_LONG:
489 case OS_SINGLE:
490 tmp = val;
491 break;
492 default:
493 g_assert_not_reached();
494 }
495 return tmp;
496 }
497
498 /* Generate code for an "effective address". Does not adjust the base
499 register for autoincrement addressing modes. */
500 static TCGv gen_lea(CPUM68KState *env, DisasContext *s, uint16_t insn,
501 int opsize)
502 {
503 TCGv reg;
504 TCGv tmp;
505 uint16_t ext;
506 uint32_t offset;
507
508 switch ((insn >> 3) & 7) {
509 case 0: /* Data register direct. */
510 case 1: /* Address register direct. */
511 return NULL_QREG;
512 case 2: /* Indirect register */
513 case 3: /* Indirect postincrement. */
514 return AREG(insn, 0);
515 case 4: /* Indirect predecrememnt. */
516 reg = AREG(insn, 0);
517 tmp = tcg_temp_new();
518 tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize));
519 return tmp;
520 case 5: /* Indirect displacement. */
521 reg = AREG(insn, 0);
522 tmp = tcg_temp_new();
523 ext = cpu_lduw_code(env, s->pc);
524 s->pc += 2;
525 tcg_gen_addi_i32(tmp, reg, (int16_t)ext);
526 return tmp;
527 case 6: /* Indirect index + displacement. */
528 reg = AREG(insn, 0);
529 return gen_lea_indexed(env, s, opsize, reg);
530 case 7: /* Other */
531 switch (insn & 7) {
532 case 0: /* Absolute short. */
533 offset = cpu_ldsw_code(env, s->pc);
534 s->pc += 2;
535 return tcg_const_i32(offset);
536 case 1: /* Absolute long. */
537 offset = read_im32(env, s);
538 return tcg_const_i32(offset);
539 case 2: /* pc displacement */
540 offset = s->pc;
541 offset += cpu_ldsw_code(env, s->pc);
542 s->pc += 2;
543 return tcg_const_i32(offset);
544 case 3: /* pc index+displacement. */
545 return gen_lea_indexed(env, s, opsize, NULL_QREG);
546 case 4: /* Immediate. */
547 default:
548 return NULL_QREG;
549 }
550 }
551 /* Should never happen. */
552 return NULL_QREG;
553 }
554
555 /* Helper function for gen_ea. Reuse the computed address between the
556 for read/write operands. */
557 static inline TCGv gen_ea_once(CPUM68KState *env, DisasContext *s,
558 uint16_t insn, int opsize, TCGv val,
559 TCGv *addrp, ea_what what)
560 {
561 TCGv tmp;
562
563 if (addrp && what == EA_STORE) {
564 tmp = *addrp;
565 } else {
566 tmp = gen_lea(env, s, insn, opsize);
567 if (IS_NULL_QREG(tmp))
568 return tmp;
569 if (addrp)
570 *addrp = tmp;
571 }
572 return gen_ldst(s, opsize, tmp, val, what);
573 }
574
575 /* Generate code to load/store a value from/into an EA. If VAL > 0 this is
576 a write otherwise it is a read (0 == sign extend, -1 == zero extend).
577 ADDRP is non-null for readwrite operands. */
578 static TCGv gen_ea(CPUM68KState *env, DisasContext *s, uint16_t insn,
579 int opsize, TCGv val, TCGv *addrp, ea_what what)
580 {
581 TCGv reg;
582 TCGv result;
583 uint32_t offset;
584
585 switch ((insn >> 3) & 7) {
586 case 0: /* Data register direct. */
587 reg = DREG(insn, 0);
588 if (what == EA_STORE) {
589 gen_partset_reg(opsize, reg, val);
590 return store_dummy;
591 } else {
592 return gen_extend(reg, opsize, what == EA_LOADS);
593 }
594 case 1: /* Address register direct. */
595 reg = AREG(insn, 0);
596 if (what == EA_STORE) {
597 tcg_gen_mov_i32(reg, val);
598 return store_dummy;
599 } else {
600 return gen_extend(reg, opsize, what == EA_LOADS);
601 }
602 case 2: /* Indirect register */
603 reg = AREG(insn, 0);
604 return gen_ldst(s, opsize, reg, val, what);
605 case 3: /* Indirect postincrement. */
606 reg = AREG(insn, 0);
607 result = gen_ldst(s, opsize, reg, val, what);
608 /* ??? This is not exception safe. The instruction may still
609 fault after this point. */
610 if (what == EA_STORE || !addrp)
611 tcg_gen_addi_i32(reg, reg, opsize_bytes(opsize));
612 return result;
613 case 4: /* Indirect predecrememnt. */
614 {
615 TCGv tmp;
616 if (addrp && what == EA_STORE) {
617 tmp = *addrp;
618 } else {
619 tmp = gen_lea(env, s, insn, opsize);
620 if (IS_NULL_QREG(tmp))
621 return tmp;
622 if (addrp)
623 *addrp = tmp;
624 }
625 result = gen_ldst(s, opsize, tmp, val, what);
626 /* ??? This is not exception safe. The instruction may still
627 fault after this point. */
628 if (what == EA_STORE || !addrp) {
629 reg = AREG(insn, 0);
630 tcg_gen_mov_i32(reg, tmp);
631 }
632 }
633 return result;
634 case 5: /* Indirect displacement. */
635 case 6: /* Indirect index + displacement. */
636 return gen_ea_once(env, s, insn, opsize, val, addrp, what);
637 case 7: /* Other */
638 switch (insn & 7) {
639 case 0: /* Absolute short. */
640 case 1: /* Absolute long. */
641 case 2: /* pc displacement */
642 case 3: /* pc index+displacement. */
643 return gen_ea_once(env, s, insn, opsize, val, addrp, what);
644 case 4: /* Immediate. */
645 /* Sign extend values for consistency. */
646 switch (opsize) {
647 case OS_BYTE:
648 if (what == EA_LOADS) {
649 offset = cpu_ldsb_code(env, s->pc + 1);
650 } else {
651 offset = cpu_ldub_code(env, s->pc + 1);
652 }
653 s->pc += 2;
654 break;
655 case OS_WORD:
656 if (what == EA_LOADS) {
657 offset = cpu_ldsw_code(env, s->pc);
658 } else {
659 offset = cpu_lduw_code(env, s->pc);
660 }
661 s->pc += 2;
662 break;
663 case OS_LONG:
664 offset = read_im32(env, s);
665 break;
666 default:
667 g_assert_not_reached();
668 }
669 return tcg_const_i32(offset);
670 default:
671 return NULL_QREG;
672 }
673 }
674 /* Should never happen. */
675 return NULL_QREG;
676 }
677
678 /* This generates a conditional branch, clobbering all temporaries. */
679 static void gen_jmpcc(DisasContext *s, int cond, int l1)
680 {
681 TCGv tmp;
682
683 /* TODO: Optimize compare/branch pairs rather than always flushing
684 flag state to CC_OP_FLAGS. */
685 gen_flush_flags(s);
686 switch (cond) {
687 case 0: /* T */
688 tcg_gen_br(l1);
689 break;
690 case 1: /* F */
691 break;
692 case 2: /* HI (!C && !Z) */
693 tmp = tcg_temp_new();
694 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z);
695 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
696 break;
697 case 3: /* LS (C || Z) */
698 tmp = tcg_temp_new();
699 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z);
700 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
701 break;
702 case 4: /* CC (!C) */
703 tmp = tcg_temp_new();
704 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C);
705 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
706 break;
707 case 5: /* CS (C) */
708 tmp = tcg_temp_new();
709 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C);
710 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
711 break;
712 case 6: /* NE (!Z) */
713 tmp = tcg_temp_new();
714 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z);
715 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
716 break;
717 case 7: /* EQ (Z) */
718 tmp = tcg_temp_new();
719 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z);
720 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
721 break;
722 case 8: /* VC (!V) */
723 tmp = tcg_temp_new();
724 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V);
725 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
726 break;
727 case 9: /* VS (V) */
728 tmp = tcg_temp_new();
729 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V);
730 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
731 break;
732 case 10: /* PL (!N) */
733 tmp = tcg_temp_new();
734 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
735 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
736 break;
737 case 11: /* MI (N) */
738 tmp = tcg_temp_new();
739 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
740 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
741 break;
742 case 12: /* GE (!(N ^ V)) */
743 tmp = tcg_temp_new();
744 assert(CCF_V == (CCF_N >> 2));
745 tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2);
746 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
747 tcg_gen_andi_i32(tmp, tmp, CCF_V);
748 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
749 break;
750 case 13: /* LT (N ^ V) */
751 tmp = tcg_temp_new();
752 assert(CCF_V == (CCF_N >> 2));
753 tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2);
754 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
755 tcg_gen_andi_i32(tmp, tmp, CCF_V);
756 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
757 break;
758 case 14: /* GT (!(Z || (N ^ V))) */
759 tmp = tcg_temp_new();
760 assert(CCF_V == (CCF_N >> 2));
761 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
762 tcg_gen_shri_i32(tmp, tmp, 2);
763 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
764 tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z);
765 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
766 break;
767 case 15: /* LE (Z || (N ^ V)) */
768 tmp = tcg_temp_new();
769 assert(CCF_V == (CCF_N >> 2));
770 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
771 tcg_gen_shri_i32(tmp, tmp, 2);
772 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
773 tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z);
774 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
775 break;
776 default:
777 /* Should ever happen. */
778 abort();
779 }
780 }
781
782 DISAS_INSN(scc)
783 {
784 int l1;
785 int cond;
786 TCGv reg;
787
788 l1 = gen_new_label();
789 cond = (insn >> 8) & 0xf;
790 reg = DREG(insn, 0);
791 tcg_gen_andi_i32(reg, reg, 0xffffff00);
792 /* This is safe because we modify the reg directly, with no other values
793 live. */
794 gen_jmpcc(s, cond ^ 1, l1);
795 tcg_gen_ori_i32(reg, reg, 0xff);
796 gen_set_label(l1);
797 }
798
799 /* Force a TB lookup after an instruction that changes the CPU state. */
800 static void gen_lookup_tb(DisasContext *s)
801 {
802 gen_flush_cc_op(s);
803 tcg_gen_movi_i32(QREG_PC, s->pc);
804 s->is_jmp = DISAS_UPDATE;
805 }
806
807 /* Generate a jump to an immediate address. */
808 static void gen_jmp_im(DisasContext *s, uint32_t dest)
809 {
810 gen_flush_cc_op(s);
811 tcg_gen_movi_i32(QREG_PC, dest);
812 s->is_jmp = DISAS_JUMP;
813 }
814
815 /* Generate a jump to the address in qreg DEST. */
816 static void gen_jmp(DisasContext *s, TCGv dest)
817 {
818 gen_flush_cc_op(s);
819 tcg_gen_mov_i32(QREG_PC, dest);
820 s->is_jmp = DISAS_JUMP;
821 }
822
823 static void gen_exception(DisasContext *s, uint32_t where, int nr)
824 {
825 gen_flush_cc_op(s);
826 gen_jmp_im(s, where);
827 gen_helper_raise_exception(cpu_env, tcg_const_i32(nr));
828 }
829
830 static inline void gen_addr_fault(DisasContext *s)
831 {
832 gen_exception(s, s->insn_pc, EXCP_ADDRESS);
833 }
834
835 #define SRC_EA(env, result, opsize, op_sign, addrp) do { \
836 result = gen_ea(env, s, insn, opsize, NULL_QREG, addrp, \
837 op_sign ? EA_LOADS : EA_LOADU); \
838 if (IS_NULL_QREG(result)) { \
839 gen_addr_fault(s); \
840 return; \
841 } \
842 } while (0)
843
844 #define DEST_EA(env, insn, opsize, val, addrp) do { \
845 TCGv ea_result = gen_ea(env, s, insn, opsize, val, addrp, EA_STORE); \
846 if (IS_NULL_QREG(ea_result)) { \
847 gen_addr_fault(s); \
848 return; \
849 } \
850 } while (0)
851
852 /* Generate a jump to an immediate address. */
853 static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
854 {
855 TranslationBlock *tb;
856
857 tb = s->tb;
858 if (unlikely(s->singlestep_enabled)) {
859 gen_exception(s, dest, EXCP_DEBUG);
860 } else if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) ||
861 (s->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
862 tcg_gen_goto_tb(n);
863 tcg_gen_movi_i32(QREG_PC, dest);
864 tcg_gen_exit_tb((uintptr_t)tb + n);
865 } else {
866 gen_jmp_im(s, dest);
867 tcg_gen_exit_tb(0);
868 }
869 s->is_jmp = DISAS_TB_JUMP;
870 }
871
872 DISAS_INSN(undef_mac)
873 {
874 gen_exception(s, s->pc - 2, EXCP_LINEA);
875 }
876
877 DISAS_INSN(undef_fpu)
878 {
879 gen_exception(s, s->pc - 2, EXCP_LINEF);
880 }
881
882 DISAS_INSN(undef)
883 {
884 M68kCPU *cpu = m68k_env_get_cpu(env);
885
886 gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
887 cpu_abort(CPU(cpu), "Illegal instruction: %04x @ %08x", insn, s->pc - 2);
888 }
889
890 DISAS_INSN(mulw)
891 {
892 TCGv reg;
893 TCGv tmp;
894 TCGv src;
895 int sign;
896
897 sign = (insn & 0x100) != 0;
898 reg = DREG(insn, 9);
899 tmp = tcg_temp_new();
900 if (sign)
901 tcg_gen_ext16s_i32(tmp, reg);
902 else
903 tcg_gen_ext16u_i32(tmp, reg);
904 SRC_EA(env, src, OS_WORD, sign, NULL);
905 tcg_gen_mul_i32(tmp, tmp, src);
906 tcg_gen_mov_i32(reg, tmp);
907 /* Unlike m68k, coldfire always clears the overflow bit. */
908 gen_logic_cc(s, tmp);
909 }
910
911 DISAS_INSN(divw)
912 {
913 TCGv reg;
914 TCGv tmp;
915 TCGv src;
916 int sign;
917
918 sign = (insn & 0x100) != 0;
919 reg = DREG(insn, 9);
920 if (sign) {
921 tcg_gen_ext16s_i32(QREG_DIV1, reg);
922 } else {
923 tcg_gen_ext16u_i32(QREG_DIV1, reg);
924 }
925 SRC_EA(env, src, OS_WORD, sign, NULL);
926 tcg_gen_mov_i32(QREG_DIV2, src);
927 if (sign) {
928 gen_helper_divs(cpu_env, tcg_const_i32(1));
929 } else {
930 gen_helper_divu(cpu_env, tcg_const_i32(1));
931 }
932
933 tmp = tcg_temp_new();
934 src = tcg_temp_new();
935 tcg_gen_ext16u_i32(tmp, QREG_DIV1);
936 tcg_gen_shli_i32(src, QREG_DIV2, 16);
937 tcg_gen_or_i32(reg, tmp, src);
938 s->cc_op = CC_OP_FLAGS;
939 }
940
941 DISAS_INSN(divl)
942 {
943 TCGv num;
944 TCGv den;
945 TCGv reg;
946 uint16_t ext;
947
948 ext = cpu_lduw_code(env, s->pc);
949 s->pc += 2;
950 if (ext & 0x87f8) {
951 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
952 return;
953 }
954 num = DREG(ext, 12);
955 reg = DREG(ext, 0);
956 tcg_gen_mov_i32(QREG_DIV1, num);
957 SRC_EA(env, den, OS_LONG, 0, NULL);
958 tcg_gen_mov_i32(QREG_DIV2, den);
959 if (ext & 0x0800) {
960 gen_helper_divs(cpu_env, tcg_const_i32(0));
961 } else {
962 gen_helper_divu(cpu_env, tcg_const_i32(0));
963 }
964 if ((ext & 7) == ((ext >> 12) & 7)) {
965 /* div */
966 tcg_gen_mov_i32 (reg, QREG_DIV1);
967 } else {
968 /* rem */
969 tcg_gen_mov_i32 (reg, QREG_DIV2);
970 }
971 s->cc_op = CC_OP_FLAGS;
972 }
973
974 DISAS_INSN(addsub)
975 {
976 TCGv reg;
977 TCGv dest;
978 TCGv src;
979 TCGv tmp;
980 TCGv addr;
981 int add;
982
983 add = (insn & 0x4000) != 0;
984 reg = DREG(insn, 9);
985 dest = tcg_temp_new();
986 if (insn & 0x100) {
987 SRC_EA(env, tmp, OS_LONG, 0, &addr);
988 src = reg;
989 } else {
990 tmp = reg;
991 SRC_EA(env, src, OS_LONG, 0, NULL);
992 }
993 if (add) {
994 tcg_gen_add_i32(dest, tmp, src);
995 gen_helper_xflag_lt(QREG_CC_X, dest, src);
996 s->cc_op = CC_OP_ADD;
997 } else {
998 gen_helper_xflag_lt(QREG_CC_X, tmp, src);
999 tcg_gen_sub_i32(dest, tmp, src);
1000 s->cc_op = CC_OP_SUB;
1001 }
1002 gen_update_cc_add(dest, src);
1003 if (insn & 0x100) {
1004 DEST_EA(env, insn, OS_LONG, dest, &addr);
1005 } else {
1006 tcg_gen_mov_i32(reg, dest);
1007 }
1008 }
1009
1010
1011 /* Reverse the order of the bits in REG. */
1012 DISAS_INSN(bitrev)
1013 {
1014 TCGv reg;
1015 reg = DREG(insn, 0);
1016 gen_helper_bitrev(reg, reg);
1017 }
1018
1019 DISAS_INSN(bitop_reg)
1020 {
1021 int opsize;
1022 int op;
1023 TCGv src1;
1024 TCGv src2;
1025 TCGv tmp;
1026 TCGv addr;
1027 TCGv dest;
1028
1029 if ((insn & 0x38) != 0)
1030 opsize = OS_BYTE;
1031 else
1032 opsize = OS_LONG;
1033 op = (insn >> 6) & 3;
1034 SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
1035 src2 = DREG(insn, 9);
1036 dest = tcg_temp_new();
1037
1038 gen_flush_flags(s);
1039 tmp = tcg_temp_new();
1040 if (opsize == OS_BYTE)
1041 tcg_gen_andi_i32(tmp, src2, 7);
1042 else
1043 tcg_gen_andi_i32(tmp, src2, 31);
1044 src2 = tmp;
1045 tmp = tcg_temp_new();
1046 tcg_gen_shr_i32(tmp, src1, src2);
1047 tcg_gen_andi_i32(tmp, tmp, 1);
1048 tcg_gen_shli_i32(tmp, tmp, 2);
1049 /* Clear CCF_Z if bit set. */
1050 tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
1051 tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1052
1053 tcg_gen_shl_i32(tmp, tcg_const_i32(1), src2);
1054 switch (op) {
1055 case 1: /* bchg */
1056 tcg_gen_xor_i32(dest, src1, tmp);
1057 break;
1058 case 2: /* bclr */
1059 tcg_gen_not_i32(tmp, tmp);
1060 tcg_gen_and_i32(dest, src1, tmp);
1061 break;
1062 case 3: /* bset */
1063 tcg_gen_or_i32(dest, src1, tmp);
1064 break;
1065 default: /* btst */
1066 break;
1067 }
1068 if (op)
1069 DEST_EA(env, insn, opsize, dest, &addr);
1070 }
1071
1072 DISAS_INSN(sats)
1073 {
1074 TCGv reg;
1075 reg = DREG(insn, 0);
1076 gen_flush_flags(s);
1077 gen_helper_sats(reg, reg, QREG_CC_DEST);
1078 gen_logic_cc(s, reg);
1079 }
1080
1081 static void gen_push(DisasContext *s, TCGv val)
1082 {
1083 TCGv tmp;
1084
1085 tmp = tcg_temp_new();
1086 tcg_gen_subi_i32(tmp, QREG_SP, 4);
1087 gen_store(s, OS_LONG, tmp, val);
1088 tcg_gen_mov_i32(QREG_SP, tmp);
1089 }
1090
1091 DISAS_INSN(movem)
1092 {
1093 TCGv addr;
1094 int i;
1095 uint16_t mask;
1096 TCGv reg;
1097 TCGv tmp;
1098 int is_load;
1099
1100 mask = cpu_lduw_code(env, s->pc);
1101 s->pc += 2;
1102 tmp = gen_lea(env, s, insn, OS_LONG);
1103 if (IS_NULL_QREG(tmp)) {
1104 gen_addr_fault(s);
1105 return;
1106 }
1107 addr = tcg_temp_new();
1108 tcg_gen_mov_i32(addr, tmp);
1109 is_load = ((insn & 0x0400) != 0);
1110 for (i = 0; i < 16; i++, mask >>= 1) {
1111 if (mask & 1) {
1112 if (i < 8)
1113 reg = DREG(i, 0);
1114 else
1115 reg = AREG(i, 0);
1116 if (is_load) {
1117 tmp = gen_load(s, OS_LONG, addr, 0);
1118 tcg_gen_mov_i32(reg, tmp);
1119 } else {
1120 gen_store(s, OS_LONG, addr, reg);
1121 }
1122 if (mask != 1)
1123 tcg_gen_addi_i32(addr, addr, 4);
1124 }
1125 }
1126 }
1127
1128 DISAS_INSN(bitop_im)
1129 {
1130 int opsize;
1131 int op;
1132 TCGv src1;
1133 uint32_t mask;
1134 int bitnum;
1135 TCGv tmp;
1136 TCGv addr;
1137
1138 if ((insn & 0x38) != 0)
1139 opsize = OS_BYTE;
1140 else
1141 opsize = OS_LONG;
1142 op = (insn >> 6) & 3;
1143
1144 bitnum = cpu_lduw_code(env, s->pc);
1145 s->pc += 2;
1146 if (bitnum & 0xff00) {
1147 disas_undef(env, s, insn);
1148 return;
1149 }
1150
1151 SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
1152
1153 gen_flush_flags(s);
1154 if (opsize == OS_BYTE)
1155 bitnum &= 7;
1156 else
1157 bitnum &= 31;
1158 mask = 1 << bitnum;
1159
1160 tmp = tcg_temp_new();
1161 assert (CCF_Z == (1 << 2));
1162 if (bitnum > 2)
1163 tcg_gen_shri_i32(tmp, src1, bitnum - 2);
1164 else if (bitnum < 2)
1165 tcg_gen_shli_i32(tmp, src1, 2 - bitnum);
1166 else
1167 tcg_gen_mov_i32(tmp, src1);
1168 tcg_gen_andi_i32(tmp, tmp, CCF_Z);
1169 /* Clear CCF_Z if bit set. */
1170 tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
1171 tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1172 if (op) {
1173 switch (op) {
1174 case 1: /* bchg */
1175 tcg_gen_xori_i32(tmp, src1, mask);
1176 break;
1177 case 2: /* bclr */
1178 tcg_gen_andi_i32(tmp, src1, ~mask);
1179 break;
1180 case 3: /* bset */
1181 tcg_gen_ori_i32(tmp, src1, mask);
1182 break;
1183 default: /* btst */
1184 break;
1185 }
1186 DEST_EA(env, insn, opsize, tmp, &addr);
1187 }
1188 }
1189
1190 DISAS_INSN(arith_im)
1191 {
1192 int op;
1193 uint32_t im;
1194 TCGv src1;
1195 TCGv dest;
1196 TCGv addr;
1197
1198 op = (insn >> 9) & 7;
1199 SRC_EA(env, src1, OS_LONG, 0, (op == 6) ? NULL : &addr);
1200 im = read_im32(env, s);
1201 dest = tcg_temp_new();
1202 switch (op) {
1203 case 0: /* ori */
1204 tcg_gen_ori_i32(dest, src1, im);
1205 gen_logic_cc(s, dest);
1206 break;
1207 case 1: /* andi */
1208 tcg_gen_andi_i32(dest, src1, im);
1209 gen_logic_cc(s, dest);
1210 break;
1211 case 2: /* subi */
1212 tcg_gen_mov_i32(dest, src1);
1213 gen_helper_xflag_lt(QREG_CC_X, dest, tcg_const_i32(im));
1214 tcg_gen_subi_i32(dest, dest, im);
1215 gen_update_cc_add(dest, tcg_const_i32(im));
1216 s->cc_op = CC_OP_SUB;
1217 break;
1218 case 3: /* addi */
1219 tcg_gen_mov_i32(dest, src1);
1220 tcg_gen_addi_i32(dest, dest, im);
1221 gen_update_cc_add(dest, tcg_const_i32(im));
1222 gen_helper_xflag_lt(QREG_CC_X, dest, tcg_const_i32(im));
1223 s->cc_op = CC_OP_ADD;
1224 break;
1225 case 5: /* eori */
1226 tcg_gen_xori_i32(dest, src1, im);
1227 gen_logic_cc(s, dest);
1228 break;
1229 case 6: /* cmpi */
1230 tcg_gen_mov_i32(dest, src1);
1231 tcg_gen_subi_i32(dest, dest, im);
1232 gen_update_cc_add(dest, tcg_const_i32(im));
1233 s->cc_op = CC_OP_SUB;
1234 break;
1235 default:
1236 abort();
1237 }
1238 if (op != 6) {
1239 DEST_EA(env, insn, OS_LONG, dest, &addr);
1240 }
1241 }
1242
1243 DISAS_INSN(byterev)
1244 {
1245 TCGv reg;
1246
1247 reg = DREG(insn, 0);
1248 tcg_gen_bswap32_i32(reg, reg);
1249 }
1250
1251 DISAS_INSN(move)
1252 {
1253 TCGv src;
1254 TCGv dest;
1255 int op;
1256 int opsize;
1257
1258 switch (insn >> 12) {
1259 case 1: /* move.b */
1260 opsize = OS_BYTE;
1261 break;
1262 case 2: /* move.l */
1263 opsize = OS_LONG;
1264 break;
1265 case 3: /* move.w */
1266 opsize = OS_WORD;
1267 break;
1268 default:
1269 abort();
1270 }
1271 SRC_EA(env, src, opsize, 1, NULL);
1272 op = (insn >> 6) & 7;
1273 if (op == 1) {
1274 /* movea */
1275 /* The value will already have been sign extended. */
1276 dest = AREG(insn, 9);
1277 tcg_gen_mov_i32(dest, src);
1278 } else {
1279 /* normal move */
1280 uint16_t dest_ea;
1281 dest_ea = ((insn >> 9) & 7) | (op << 3);
1282 DEST_EA(env, dest_ea, opsize, src, NULL);
1283 /* This will be correct because loads sign extend. */
1284 gen_logic_cc(s, src);
1285 }
1286 }
1287
1288 DISAS_INSN(negx)
1289 {
1290 TCGv reg;
1291
1292 gen_flush_flags(s);
1293 reg = DREG(insn, 0);
1294 gen_helper_subx_cc(reg, cpu_env, tcg_const_i32(0), reg);
1295 }
1296
1297 DISAS_INSN(lea)
1298 {
1299 TCGv reg;
1300 TCGv tmp;
1301
1302 reg = AREG(insn, 9);
1303 tmp = gen_lea(env, s, insn, OS_LONG);
1304 if (IS_NULL_QREG(tmp)) {
1305 gen_addr_fault(s);
1306 return;
1307 }
1308 tcg_gen_mov_i32(reg, tmp);
1309 }
1310
1311 DISAS_INSN(clr)
1312 {
1313 int opsize;
1314
1315 switch ((insn >> 6) & 3) {
1316 case 0: /* clr.b */
1317 opsize = OS_BYTE;
1318 break;
1319 case 1: /* clr.w */
1320 opsize = OS_WORD;
1321 break;
1322 case 2: /* clr.l */
1323 opsize = OS_LONG;
1324 break;
1325 default:
1326 abort();
1327 }
1328 DEST_EA(env, insn, opsize, tcg_const_i32(0), NULL);
1329 gen_logic_cc(s, tcg_const_i32(0));
1330 }
1331
1332 static TCGv gen_get_ccr(DisasContext *s)
1333 {
1334 TCGv dest;
1335
1336 gen_flush_flags(s);
1337 dest = tcg_temp_new();
1338 tcg_gen_shli_i32(dest, QREG_CC_X, 4);
1339 tcg_gen_or_i32(dest, dest, QREG_CC_DEST);
1340 return dest;
1341 }
1342
1343 DISAS_INSN(move_from_ccr)
1344 {
1345 TCGv reg;
1346 TCGv ccr;
1347
1348 ccr = gen_get_ccr(s);
1349 reg = DREG(insn, 0);
1350 gen_partset_reg(OS_WORD, reg, ccr);
1351 }
1352
1353 DISAS_INSN(neg)
1354 {
1355 TCGv reg;
1356 TCGv src1;
1357
1358 reg = DREG(insn, 0);
1359 src1 = tcg_temp_new();
1360 tcg_gen_mov_i32(src1, reg);
1361 tcg_gen_neg_i32(reg, src1);
1362 s->cc_op = CC_OP_SUB;
1363 gen_update_cc_add(reg, src1);
1364 gen_helper_xflag_lt(QREG_CC_X, tcg_const_i32(0), src1);
1365 s->cc_op = CC_OP_SUB;
1366 }
1367
1368 static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
1369 {
1370 tcg_gen_movi_i32(QREG_CC_DEST, val & 0xf);
1371 tcg_gen_movi_i32(QREG_CC_X, (val & 0x10) >> 4);
1372 if (!ccr_only) {
1373 gen_helper_set_sr(cpu_env, tcg_const_i32(val & 0xff00));
1374 }
1375 }
1376
1377 static void gen_set_sr(CPUM68KState *env, DisasContext *s, uint16_t insn,
1378 int ccr_only)
1379 {
1380 TCGv tmp;
1381 TCGv reg;
1382
1383 s->cc_op = CC_OP_FLAGS;
1384 if ((insn & 0x38) == 0)
1385 {
1386 tmp = tcg_temp_new();
1387 reg = DREG(insn, 0);
1388 tcg_gen_andi_i32(QREG_CC_DEST, reg, 0xf);
1389 tcg_gen_shri_i32(tmp, reg, 4);
1390 tcg_gen_andi_i32(QREG_CC_X, tmp, 1);
1391 if (!ccr_only) {
1392 gen_helper_set_sr(cpu_env, reg);
1393 }
1394 }
1395 else if ((insn & 0x3f) == 0x3c)
1396 {
1397 uint16_t val;
1398 val = cpu_lduw_code(env, s->pc);
1399 s->pc += 2;
1400 gen_set_sr_im(s, val, ccr_only);
1401 }
1402 else
1403 disas_undef(env, s, insn);
1404 }
1405
1406 DISAS_INSN(move_to_ccr)
1407 {
1408 gen_set_sr(env, s, insn, 1);
1409 }
1410
1411 DISAS_INSN(not)
1412 {
1413 TCGv reg;
1414
1415 reg = DREG(insn, 0);
1416 tcg_gen_not_i32(reg, reg);
1417 gen_logic_cc(s, reg);
1418 }
1419
1420 DISAS_INSN(swap)
1421 {
1422 TCGv src1;
1423 TCGv src2;
1424 TCGv reg;
1425
1426 src1 = tcg_temp_new();
1427 src2 = tcg_temp_new();
1428 reg = DREG(insn, 0);
1429 tcg_gen_shli_i32(src1, reg, 16);
1430 tcg_gen_shri_i32(src2, reg, 16);
1431 tcg_gen_or_i32(reg, src1, src2);
1432 gen_logic_cc(s, reg);
1433 }
1434
1435 DISAS_INSN(pea)
1436 {
1437 TCGv tmp;
1438
1439 tmp = gen_lea(env, s, insn, OS_LONG);
1440 if (IS_NULL_QREG(tmp)) {
1441 gen_addr_fault(s);
1442 return;
1443 }
1444 gen_push(s, tmp);
1445 }
1446
1447 DISAS_INSN(ext)
1448 {
1449 int op;
1450 TCGv reg;
1451 TCGv tmp;
1452
1453 reg = DREG(insn, 0);
1454 op = (insn >> 6) & 7;
1455 tmp = tcg_temp_new();
1456 if (op == 3)
1457 tcg_gen_ext16s_i32(tmp, reg);
1458 else
1459 tcg_gen_ext8s_i32(tmp, reg);
1460 if (op == 2)
1461 gen_partset_reg(OS_WORD, reg, tmp);
1462 else
1463 tcg_gen_mov_i32(reg, tmp);
1464 gen_logic_cc(s, tmp);
1465 }
1466
1467 DISAS_INSN(tst)
1468 {
1469 int opsize;
1470 TCGv tmp;
1471
1472 switch ((insn >> 6) & 3) {
1473 case 0: /* tst.b */
1474 opsize = OS_BYTE;
1475 break;
1476 case 1: /* tst.w */
1477 opsize = OS_WORD;
1478 break;
1479 case 2: /* tst.l */
1480 opsize = OS_LONG;
1481 break;
1482 default:
1483 abort();
1484 }
1485 SRC_EA(env, tmp, opsize, 1, NULL);
1486 gen_logic_cc(s, tmp);
1487 }
1488
1489 DISAS_INSN(pulse)
1490 {
1491 /* Implemented as a NOP. */
1492 }
1493
1494 DISAS_INSN(illegal)
1495 {
1496 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
1497 }
1498
1499 /* ??? This should be atomic. */
1500 DISAS_INSN(tas)
1501 {
1502 TCGv dest;
1503 TCGv src1;
1504 TCGv addr;
1505
1506 dest = tcg_temp_new();
1507 SRC_EA(env, src1, OS_BYTE, 1, &addr);
1508 gen_logic_cc(s, src1);
1509 tcg_gen_ori_i32(dest, src1, 0x80);
1510 DEST_EA(env, insn, OS_BYTE, dest, &addr);
1511 }
1512
1513 DISAS_INSN(mull)
1514 {
1515 uint16_t ext;
1516 TCGv reg;
1517 TCGv src1;
1518 TCGv dest;
1519
1520 /* The upper 32 bits of the product are discarded, so
1521 muls.l and mulu.l are functionally equivalent. */
1522 ext = cpu_lduw_code(env, s->pc);
1523 s->pc += 2;
1524 if (ext & 0x87ff) {
1525 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
1526 return;
1527 }
1528 reg = DREG(ext, 12);
1529 SRC_EA(env, src1, OS_LONG, 0, NULL);
1530 dest = tcg_temp_new();
1531 tcg_gen_mul_i32(dest, src1, reg);
1532 tcg_gen_mov_i32(reg, dest);
1533 /* Unlike m68k, coldfire always clears the overflow bit. */
1534 gen_logic_cc(s, dest);
1535 }
1536
1537 DISAS_INSN(link)
1538 {
1539 int16_t offset;
1540 TCGv reg;
1541 TCGv tmp;
1542
1543 offset = cpu_ldsw_code(env, s->pc);
1544 s->pc += 2;
1545 reg = AREG(insn, 0);
1546 tmp = tcg_temp_new();
1547 tcg_gen_subi_i32(tmp, QREG_SP, 4);
1548 gen_store(s, OS_LONG, tmp, reg);
1549 if ((insn & 7) != 7)
1550 tcg_gen_mov_i32(reg, tmp);
1551 tcg_gen_addi_i32(QREG_SP, tmp, offset);
1552 }
1553
1554 DISAS_INSN(unlk)
1555 {
1556 TCGv src;
1557 TCGv reg;
1558 TCGv tmp;
1559
1560 src = tcg_temp_new();
1561 reg = AREG(insn, 0);
1562 tcg_gen_mov_i32(src, reg);
1563 tmp = gen_load(s, OS_LONG, src, 0);
1564 tcg_gen_mov_i32(reg, tmp);
1565 tcg_gen_addi_i32(QREG_SP, src, 4);
1566 }
1567
1568 DISAS_INSN(nop)
1569 {
1570 }
1571
1572 DISAS_INSN(rts)
1573 {
1574 TCGv tmp;
1575
1576 tmp = gen_load(s, OS_LONG, QREG_SP, 0);
1577 tcg_gen_addi_i32(QREG_SP, QREG_SP, 4);
1578 gen_jmp(s, tmp);
1579 }
1580
1581 DISAS_INSN(jump)
1582 {
1583 TCGv tmp;
1584
1585 /* Load the target address first to ensure correct exception
1586 behavior. */
1587 tmp = gen_lea(env, s, insn, OS_LONG);
1588 if (IS_NULL_QREG(tmp)) {
1589 gen_addr_fault(s);
1590 return;
1591 }
1592 if ((insn & 0x40) == 0) {
1593 /* jsr */
1594 gen_push(s, tcg_const_i32(s->pc));
1595 }
1596 gen_jmp(s, tmp);
1597 }
1598
1599 DISAS_INSN(addsubq)
1600 {
1601 TCGv src1;
1602 TCGv src2;
1603 TCGv dest;
1604 int val;
1605 TCGv addr;
1606
1607 SRC_EA(env, src1, OS_LONG, 0, &addr);
1608 val = (insn >> 9) & 7;
1609 if (val == 0)
1610 val = 8;
1611 dest = tcg_temp_new();
1612 tcg_gen_mov_i32(dest, src1);
1613 if ((insn & 0x38) == 0x08) {
1614 /* Don't update condition codes if the destination is an
1615 address register. */
1616 if (insn & 0x0100) {
1617 tcg_gen_subi_i32(dest, dest, val);
1618 } else {
1619 tcg_gen_addi_i32(dest, dest, val);
1620 }
1621 } else {
1622 src2 = tcg_const_i32(val);
1623 if (insn & 0x0100) {
1624 gen_helper_xflag_lt(QREG_CC_X, dest, src2);
1625 tcg_gen_subi_i32(dest, dest, val);
1626 s->cc_op = CC_OP_SUB;
1627 } else {
1628 tcg_gen_addi_i32(dest, dest, val);
1629 gen_helper_xflag_lt(QREG_CC_X, dest, src2);
1630 s->cc_op = CC_OP_ADD;
1631 }
1632 gen_update_cc_add(dest, src2);
1633 }
1634 DEST_EA(env, insn, OS_LONG, dest, &addr);
1635 }
1636
1637 DISAS_INSN(tpf)
1638 {
1639 switch (insn & 7) {
1640 case 2: /* One extension word. */
1641 s->pc += 2;
1642 break;
1643 case 3: /* Two extension words. */
1644 s->pc += 4;
1645 break;
1646 case 4: /* No extension words. */
1647 break;
1648 default:
1649 disas_undef(env, s, insn);
1650 }
1651 }
1652
1653 DISAS_INSN(branch)
1654 {
1655 int32_t offset;
1656 uint32_t base;
1657 int op;
1658 int l1;
1659
1660 base = s->pc;
1661 op = (insn >> 8) & 0xf;
1662 offset = (int8_t)insn;
1663 if (offset == 0) {
1664 offset = cpu_ldsw_code(env, s->pc);
1665 s->pc += 2;
1666 } else if (offset == -1) {
1667 offset = read_im32(env, s);
1668 }
1669 if (op == 1) {
1670 /* bsr */
1671 gen_push(s, tcg_const_i32(s->pc));
1672 }
1673 gen_flush_cc_op(s);
1674 if (op > 1) {
1675 /* Bcc */
1676 l1 = gen_new_label();
1677 gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
1678 gen_jmp_tb(s, 1, base + offset);
1679 gen_set_label(l1);
1680 gen_jmp_tb(s, 0, s->pc);
1681 } else {
1682 /* Unconditional branch. */
1683 gen_jmp_tb(s, 0, base + offset);
1684 }
1685 }
1686
1687 DISAS_INSN(moveq)
1688 {
1689 uint32_t val;
1690
1691 val = (int8_t)insn;
1692 tcg_gen_movi_i32(DREG(insn, 9), val);
1693 gen_logic_cc(s, tcg_const_i32(val));
1694 }
1695
1696 DISAS_INSN(mvzs)
1697 {
1698 int opsize;
1699 TCGv src;
1700 TCGv reg;
1701
1702 if (insn & 0x40)
1703 opsize = OS_WORD;
1704 else
1705 opsize = OS_BYTE;
1706 SRC_EA(env, src, opsize, (insn & 0x80) == 0, NULL);
1707 reg = DREG(insn, 9);
1708 tcg_gen_mov_i32(reg, src);
1709 gen_logic_cc(s, src);
1710 }
1711
1712 DISAS_INSN(or)
1713 {
1714 TCGv reg;
1715 TCGv dest;
1716 TCGv src;
1717 TCGv addr;
1718
1719 reg = DREG(insn, 9);
1720 dest = tcg_temp_new();
1721 if (insn & 0x100) {
1722 SRC_EA(env, src, OS_LONG, 0, &addr);
1723 tcg_gen_or_i32(dest, src, reg);
1724 DEST_EA(env, insn, OS_LONG, dest, &addr);
1725 } else {
1726 SRC_EA(env, src, OS_LONG, 0, NULL);
1727 tcg_gen_or_i32(dest, src, reg);
1728 tcg_gen_mov_i32(reg, dest);
1729 }
1730 gen_logic_cc(s, dest);
1731 }
1732
1733 DISAS_INSN(suba)
1734 {
1735 TCGv src;
1736 TCGv reg;
1737
1738 SRC_EA(env, src, OS_LONG, 0, NULL);
1739 reg = AREG(insn, 9);
1740 tcg_gen_sub_i32(reg, reg, src);
1741 }
1742
1743 DISAS_INSN(subx)
1744 {
1745 TCGv reg;
1746 TCGv src;
1747
1748 gen_flush_flags(s);
1749 reg = DREG(insn, 9);
1750 src = DREG(insn, 0);
1751 gen_helper_subx_cc(reg, cpu_env, reg, src);
1752 }
1753
1754 DISAS_INSN(mov3q)
1755 {
1756 TCGv src;
1757 int val;
1758
1759 val = (insn >> 9) & 7;
1760 if (val == 0)
1761 val = -1;
1762 src = tcg_const_i32(val);
1763 gen_logic_cc(s, src);
1764 DEST_EA(env, insn, OS_LONG, src, NULL);
1765 }
1766
1767 DISAS_INSN(cmp)
1768 {
1769 int op;
1770 TCGv src;
1771 TCGv reg;
1772 TCGv dest;
1773 int opsize;
1774
1775 op = (insn >> 6) & 3;
1776 switch (op) {
1777 case 0: /* cmp.b */
1778 opsize = OS_BYTE;
1779 s->cc_op = CC_OP_CMPB;
1780 break;
1781 case 1: /* cmp.w */
1782 opsize = OS_WORD;
1783 s->cc_op = CC_OP_CMPW;
1784 break;
1785 case 2: /* cmp.l */
1786 opsize = OS_LONG;
1787 s->cc_op = CC_OP_SUB;
1788 break;
1789 default:
1790 abort();
1791 }
1792 SRC_EA(env, src, opsize, 1, NULL);
1793 reg = DREG(insn, 9);
1794 dest = tcg_temp_new();
1795 tcg_gen_sub_i32(dest, reg, src);
1796 gen_update_cc_add(dest, src);
1797 }
1798
1799 DISAS_INSN(cmpa)
1800 {
1801 int opsize;
1802 TCGv src;
1803 TCGv reg;
1804 TCGv dest;
1805
1806 if (insn & 0x100) {
1807 opsize = OS_LONG;
1808 } else {
1809 opsize = OS_WORD;
1810 }
1811 SRC_EA(env, src, opsize, 1, NULL);
1812 reg = AREG(insn, 9);
1813 dest = tcg_temp_new();
1814 tcg_gen_sub_i32(dest, reg, src);
1815 gen_update_cc_add(dest, src);
1816 s->cc_op = CC_OP_SUB;
1817 }
1818
1819 DISAS_INSN(eor)
1820 {
1821 TCGv src;
1822 TCGv reg;
1823 TCGv dest;
1824 TCGv addr;
1825
1826 SRC_EA(env, src, OS_LONG, 0, &addr);
1827 reg = DREG(insn, 9);
1828 dest = tcg_temp_new();
1829 tcg_gen_xor_i32(dest, src, reg);
1830 gen_logic_cc(s, dest);
1831 DEST_EA(env, insn, OS_LONG, dest, &addr);
1832 }
1833
1834 DISAS_INSN(and)
1835 {
1836 TCGv src;
1837 TCGv reg;
1838 TCGv dest;
1839 TCGv addr;
1840
1841 reg = DREG(insn, 9);
1842 dest = tcg_temp_new();
1843 if (insn & 0x100) {
1844 SRC_EA(env, src, OS_LONG, 0, &addr);
1845 tcg_gen_and_i32(dest, src, reg);
1846 DEST_EA(env, insn, OS_LONG, dest, &addr);
1847 } else {
1848 SRC_EA(env, src, OS_LONG, 0, NULL);
1849 tcg_gen_and_i32(dest, src, reg);
1850 tcg_gen_mov_i32(reg, dest);
1851 }
1852 gen_logic_cc(s, dest);
1853 }
1854
1855 DISAS_INSN(adda)
1856 {
1857 TCGv src;
1858 TCGv reg;
1859
1860 SRC_EA(env, src, OS_LONG, 0, NULL);
1861 reg = AREG(insn, 9);
1862 tcg_gen_add_i32(reg, reg, src);
1863 }
1864
1865 DISAS_INSN(addx)
1866 {
1867 TCGv reg;
1868 TCGv src;
1869
1870 gen_flush_flags(s);
1871 reg = DREG(insn, 9);
1872 src = DREG(insn, 0);
1873 gen_helper_addx_cc(reg, cpu_env, reg, src);
1874 s->cc_op = CC_OP_FLAGS;
1875 }
1876
1877 /* TODO: This could be implemented without helper functions. */
1878 DISAS_INSN(shift_im)
1879 {
1880 TCGv reg;
1881 int tmp;
1882 TCGv shift;
1883
1884 reg = DREG(insn, 0);
1885 tmp = (insn >> 9) & 7;
1886 if (tmp == 0)
1887 tmp = 8;
1888 shift = tcg_const_i32(tmp);
1889 /* No need to flush flags becuse we know we will set C flag. */
1890 if (insn & 0x100) {
1891 gen_helper_shl_cc(reg, cpu_env, reg, shift);
1892 } else {
1893 if (insn & 8) {
1894 gen_helper_shr_cc(reg, cpu_env, reg, shift);
1895 } else {
1896 gen_helper_sar_cc(reg, cpu_env, reg, shift);
1897 }
1898 }
1899 s->cc_op = CC_OP_SHIFT;
1900 }
1901
1902 DISAS_INSN(shift_reg)
1903 {
1904 TCGv reg;
1905 TCGv shift;
1906
1907 reg = DREG(insn, 0);
1908 shift = DREG(insn, 9);
1909 /* Shift by zero leaves C flag unmodified. */
1910 gen_flush_flags(s);
1911 if (insn & 0x100) {
1912 gen_helper_shl_cc(reg, cpu_env, reg, shift);
1913 } else {
1914 if (insn & 8) {
1915 gen_helper_shr_cc(reg, cpu_env, reg, shift);
1916 } else {
1917 gen_helper_sar_cc(reg, cpu_env, reg, shift);
1918 }
1919 }
1920 s->cc_op = CC_OP_SHIFT;
1921 }
1922
1923 DISAS_INSN(ff1)
1924 {
1925 TCGv reg;
1926 reg = DREG(insn, 0);
1927 gen_logic_cc(s, reg);
1928 gen_helper_ff1(reg, reg);
1929 }
1930
1931 static TCGv gen_get_sr(DisasContext *s)
1932 {
1933 TCGv ccr;
1934 TCGv sr;
1935
1936 ccr = gen_get_ccr(s);
1937 sr = tcg_temp_new();
1938 tcg_gen_andi_i32(sr, QREG_SR, 0xffe0);
1939 tcg_gen_or_i32(sr, sr, ccr);
1940 return sr;
1941 }
1942
1943 DISAS_INSN(strldsr)
1944 {
1945 uint16_t ext;
1946 uint32_t addr;
1947
1948 addr = s->pc - 2;
1949 ext = cpu_lduw_code(env, s->pc);
1950 s->pc += 2;
1951 if (ext != 0x46FC) {
1952 gen_exception(s, addr, EXCP_UNSUPPORTED);
1953 return;
1954 }
1955 ext = cpu_lduw_code(env, s->pc);
1956 s->pc += 2;
1957 if (IS_USER(s) || (ext & SR_S) == 0) {
1958 gen_exception(s, addr, EXCP_PRIVILEGE);
1959 return;
1960 }
1961 gen_push(s, gen_get_sr(s));
1962 gen_set_sr_im(s, ext, 0);
1963 }
1964
1965 DISAS_INSN(move_from_sr)
1966 {
1967 TCGv reg;
1968 TCGv sr;
1969
1970 if (IS_USER(s)) {
1971 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1972 return;
1973 }
1974 sr = gen_get_sr(s);
1975 reg = DREG(insn, 0);
1976 gen_partset_reg(OS_WORD, reg, sr);
1977 }
1978
1979 DISAS_INSN(move_to_sr)
1980 {
1981 if (IS_USER(s)) {
1982 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1983 return;
1984 }
1985 gen_set_sr(env, s, insn, 0);
1986 gen_lookup_tb(s);
1987 }
1988
1989 DISAS_INSN(move_from_usp)
1990 {
1991 if (IS_USER(s)) {
1992 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1993 return;
1994 }
1995 /* TODO: Implement USP. */
1996 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
1997 }
1998
1999 DISAS_INSN(move_to_usp)
2000 {
2001 if (IS_USER(s)) {
2002 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2003 return;
2004 }
2005 /* TODO: Implement USP. */
2006 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
2007 }
2008
2009 DISAS_INSN(halt)
2010 {
2011 gen_exception(s, s->pc, EXCP_HALT_INSN);
2012 }
2013
2014 DISAS_INSN(stop)
2015 {
2016 uint16_t ext;
2017
2018 if (IS_USER(s)) {
2019 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2020 return;
2021 }
2022
2023 ext = cpu_lduw_code(env, s->pc);
2024 s->pc += 2;
2025
2026 gen_set_sr_im(s, ext, 0);
2027 tcg_gen_movi_i32(cpu_halted, 1);
2028 gen_exception(s, s->pc, EXCP_HLT);
2029 }
2030
2031 DISAS_INSN(rte)
2032 {
2033 if (IS_USER(s)) {
2034 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2035 return;
2036 }
2037 gen_exception(s, s->pc - 2, EXCP_RTE);
2038 }
2039
2040 DISAS_INSN(movec)
2041 {
2042 uint16_t ext;
2043 TCGv reg;
2044
2045 if (IS_USER(s)) {
2046 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2047 return;
2048 }
2049
2050 ext = cpu_lduw_code(env, s->pc);
2051 s->pc += 2;
2052
2053 if (ext & 0x8000) {
2054 reg = AREG(ext, 12);
2055 } else {
2056 reg = DREG(ext, 12);
2057 }
2058 gen_helper_movec(cpu_env, tcg_const_i32(ext & 0xfff), reg);
2059 gen_lookup_tb(s);
2060 }
2061
2062 DISAS_INSN(intouch)
2063 {
2064 if (IS_USER(s)) {
2065 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2066 return;
2067 }
2068 /* ICache fetch. Implement as no-op. */
2069 }
2070
2071 DISAS_INSN(cpushl)
2072 {
2073 if (IS_USER(s)) {
2074 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2075 return;
2076 }
2077 /* Cache push/invalidate. Implement as no-op. */
2078 }
2079
2080 DISAS_INSN(wddata)
2081 {
2082 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2083 }
2084
2085 DISAS_INSN(wdebug)
2086 {
2087 M68kCPU *cpu = m68k_env_get_cpu(env);
2088
2089 if (IS_USER(s)) {
2090 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2091 return;
2092 }
2093 /* TODO: Implement wdebug. */
2094 cpu_abort(CPU(cpu), "WDEBUG not implemented");
2095 }
2096
2097 DISAS_INSN(trap)
2098 {
2099 gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));
2100 }
2101
2102 /* ??? FP exceptions are not implemented. Most exceptions are deferred until
2103 immediately before the next FP instruction is executed. */
2104 DISAS_INSN(fpu)
2105 {
2106 uint16_t ext;
2107 int32_t offset;
2108 int opmode;
2109 TCGv_i64 src;
2110 TCGv_i64 dest;
2111 TCGv_i64 res;
2112 TCGv tmp32;
2113 int round;
2114 int set_dest;
2115 int opsize;
2116
2117 ext = cpu_lduw_code(env, s->pc);
2118 s->pc += 2;
2119 opmode = ext & 0x7f;
2120 switch ((ext >> 13) & 7) {
2121 case 0: case 2:
2122 break;
2123 case 1:
2124 goto undef;
2125 case 3: /* fmove out */
2126 src = FREG(ext, 7);
2127 tmp32 = tcg_temp_new_i32();
2128 /* fmove */
2129 /* ??? TODO: Proper behavior on overflow. */
2130 switch ((ext >> 10) & 7) {
2131 case 0:
2132 opsize = OS_LONG;
2133 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2134 break;
2135 case 1:
2136 opsize = OS_SINGLE;
2137 gen_helper_f64_to_f32(tmp32, cpu_env, src);
2138 break;
2139 case 4:
2140 opsize = OS_WORD;
2141 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2142 break;
2143 case 5: /* OS_DOUBLE */
2144 tcg_gen_mov_i32(tmp32, AREG(insn, 0));
2145 switch ((insn >> 3) & 7) {
2146 case 2:
2147 case 3:
2148 break;
2149 case 4:
2150 tcg_gen_addi_i32(tmp32, tmp32, -8);
2151 break;
2152 case 5:
2153 offset = cpu_ldsw_code(env, s->pc);
2154 s->pc += 2;
2155 tcg_gen_addi_i32(tmp32, tmp32, offset);
2156 break;
2157 default:
2158 goto undef;
2159 }
2160 gen_store64(s, tmp32, src);
2161 switch ((insn >> 3) & 7) {
2162 case 3:
2163 tcg_gen_addi_i32(tmp32, tmp32, 8);
2164 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2165 break;
2166 case 4:
2167 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2168 break;
2169 }
2170 tcg_temp_free_i32(tmp32);
2171 return;
2172 case 6:
2173 opsize = OS_BYTE;
2174 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2175 break;
2176 default:
2177 goto undef;
2178 }
2179 DEST_EA(env, insn, opsize, tmp32, NULL);
2180 tcg_temp_free_i32(tmp32);
2181 return;
2182 case 4: /* fmove to control register. */
2183 switch ((ext >> 10) & 7) {
2184 case 4: /* FPCR */
2185 /* Not implemented. Ignore writes. */
2186 break;
2187 case 1: /* FPIAR */
2188 case 2: /* FPSR */
2189 default:
2190 cpu_abort(NULL, "Unimplemented: fmove to control %d",
2191 (ext >> 10) & 7);
2192 }
2193 break;
2194 case 5: /* fmove from control register. */
2195 switch ((ext >> 10) & 7) {
2196 case 4: /* FPCR */
2197 /* Not implemented. Always return zero. */
2198 tmp32 = tcg_const_i32(0);
2199 break;
2200 case 1: /* FPIAR */
2201 case 2: /* FPSR */
2202 default:
2203 cpu_abort(NULL, "Unimplemented: fmove from control %d",
2204 (ext >> 10) & 7);
2205 goto undef;
2206 }
2207 DEST_EA(env, insn, OS_LONG, tmp32, NULL);
2208 break;
2209 case 6: /* fmovem */
2210 case 7:
2211 {
2212 TCGv addr;
2213 uint16_t mask;
2214 int i;
2215 if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0)
2216 goto undef;
2217 tmp32 = gen_lea(env, s, insn, OS_LONG);
2218 if (IS_NULL_QREG(tmp32)) {
2219 gen_addr_fault(s);
2220 return;
2221 }
2222 addr = tcg_temp_new_i32();
2223 tcg_gen_mov_i32(addr, tmp32);
2224 mask = 0x80;
2225 for (i = 0; i < 8; i++) {
2226 if (ext & mask) {
2227 s->is_mem = 1;
2228 dest = FREG(i, 0);
2229 if (ext & (1 << 13)) {
2230 /* store */
2231 tcg_gen_qemu_stf64(dest, addr, IS_USER(s));
2232 } else {
2233 /* load */
2234 tcg_gen_qemu_ldf64(dest, addr, IS_USER(s));
2235 }
2236 if (ext & (mask - 1))
2237 tcg_gen_addi_i32(addr, addr, 8);
2238 }
2239 mask >>= 1;
2240 }
2241 tcg_temp_free_i32(addr);
2242 }
2243 return;
2244 }
2245 if (ext & (1 << 14)) {
2246 /* Source effective address. */
2247 switch ((ext >> 10) & 7) {
2248 case 0: opsize = OS_LONG; break;
2249 case 1: opsize = OS_SINGLE; break;
2250 case 4: opsize = OS_WORD; break;
2251 case 5: opsize = OS_DOUBLE; break;
2252 case 6: opsize = OS_BYTE; break;
2253 default:
2254 goto undef;
2255 }
2256 if (opsize == OS_DOUBLE) {
2257 tmp32 = tcg_temp_new_i32();
2258 tcg_gen_mov_i32(tmp32, AREG(insn, 0));
2259 switch ((insn >> 3) & 7) {
2260 case 2:
2261 case 3:
2262 break;
2263 case 4:
2264 tcg_gen_addi_i32(tmp32, tmp32, -8);
2265 break;
2266 case 5:
2267 offset = cpu_ldsw_code(env, s->pc);
2268 s->pc += 2;
2269 tcg_gen_addi_i32(tmp32, tmp32, offset);
2270 break;
2271 case 7:
2272 offset = cpu_ldsw_code(env, s->pc);
2273 offset += s->pc - 2;
2274 s->pc += 2;
2275 tcg_gen_addi_i32(tmp32, tmp32, offset);
2276 break;
2277 default:
2278 goto undef;
2279 }
2280 src = gen_load64(s, tmp32);
2281 switch ((insn >> 3) & 7) {
2282 case 3:
2283 tcg_gen_addi_i32(tmp32, tmp32, 8);
2284 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2285 break;
2286 case 4:
2287 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2288 break;
2289 }
2290 tcg_temp_free_i32(tmp32);
2291 } else {
2292 SRC_EA(env, tmp32, opsize, 1, NULL);
2293 src = tcg_temp_new_i64();
2294 switch (opsize) {
2295 case OS_LONG:
2296 case OS_WORD:
2297 case OS_BYTE:
2298 gen_helper_i32_to_f64(src, cpu_env, tmp32);
2299 break;
2300 case OS_SINGLE:
2301 gen_helper_f32_to_f64(src, cpu_env, tmp32);
2302 break;
2303 }
2304 }
2305 } else {
2306 /* Source register. */
2307 src = FREG(ext, 10);
2308 }
2309 dest = FREG(ext, 7);
2310 res = tcg_temp_new_i64();
2311 if (opmode != 0x3a)
2312 tcg_gen_mov_f64(res, dest);
2313 round = 1;
2314 set_dest = 1;
2315 switch (opmode) {
2316 case 0: case 0x40: case 0x44: /* fmove */
2317 tcg_gen_mov_f64(res, src);
2318 break;
2319 case 1: /* fint */
2320 gen_helper_iround_f64(res, cpu_env, src);
2321 round = 0;
2322 break;
2323 case 3: /* fintrz */
2324 gen_helper_itrunc_f64(res, cpu_env, src);
2325 round = 0;
2326 break;
2327 case 4: case 0x41: case 0x45: /* fsqrt */
2328 gen_helper_sqrt_f64(res, cpu_env, src);
2329 break;
2330 case 0x18: case 0x58: case 0x5c: /* fabs */
2331 gen_helper_abs_f64(res, src);
2332 break;
2333 case 0x1a: case 0x5a: case 0x5e: /* fneg */
2334 gen_helper_chs_f64(res, src);
2335 break;
2336 case 0x20: case 0x60: case 0x64: /* fdiv */
2337 gen_helper_div_f64(res, cpu_env, res, src);
2338 break;
2339 case 0x22: case 0x62: case 0x66: /* fadd */
2340 gen_helper_add_f64(res, cpu_env, res, src);
2341 break;
2342 case 0x23: case 0x63: case 0x67: /* fmul */
2343 gen_helper_mul_f64(res, cpu_env, res, src);
2344 break;
2345 case 0x28: case 0x68: case 0x6c: /* fsub */
2346 gen_helper_sub_f64(res, cpu_env, res, src);
2347 break;
2348 case 0x38: /* fcmp */
2349 gen_helper_sub_cmp_f64(res, cpu_env, res, src);
2350 set_dest = 0;
2351 round = 0;
2352 break;
2353 case 0x3a: /* ftst */
2354 tcg_gen_mov_f64(res, src);
2355 set_dest = 0;
2356 round = 0;
2357 break;
2358 default:
2359 goto undef;
2360 }
2361 if (ext & (1 << 14)) {
2362 tcg_temp_free_i64(src);
2363 }
2364 if (round) {
2365 if (opmode & 0x40) {
2366 if ((opmode & 0x4) != 0)
2367 round = 0;
2368 } else if ((s->fpcr & M68K_FPCR_PREC) == 0) {
2369 round = 0;
2370 }
2371 }
2372 if (round) {
2373 TCGv tmp = tcg_temp_new_i32();
2374 gen_helper_f64_to_f32(tmp, cpu_env, res);
2375 gen_helper_f32_to_f64(res, cpu_env, tmp);
2376 tcg_temp_free_i32(tmp);
2377 }
2378 tcg_gen_mov_f64(QREG_FP_RESULT, res);
2379 if (set_dest) {
2380 tcg_gen_mov_f64(dest, res);
2381 }
2382 tcg_temp_free_i64(res);
2383 return;
2384 undef:
2385 /* FIXME: Is this right for offset addressing modes? */
2386 s->pc -= 2;
2387 disas_undef_fpu(env, s, insn);
2388 }
2389
2390 DISAS_INSN(fbcc)
2391 {
2392 uint32_t offset;
2393 uint32_t addr;
2394 TCGv flag;
2395 int l1;
2396
2397 addr = s->pc;
2398 offset = cpu_ldsw_code(env, s->pc);
2399 s->pc += 2;
2400 if (insn & (1 << 6)) {
2401 offset = (offset << 16) | cpu_lduw_code(env, s->pc);
2402 s->pc += 2;
2403 }
2404
2405 l1 = gen_new_label();
2406 /* TODO: Raise BSUN exception. */
2407 flag = tcg_temp_new();
2408 gen_helper_compare_f64(flag, cpu_env, QREG_FP_RESULT);
2409 /* Jump to l1 if condition is true. */
2410 switch (insn & 0xf) {
2411 case 0: /* f */
2412 break;
2413 case 1: /* eq (=0) */
2414 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
2415 break;
2416 case 2: /* ogt (=1) */
2417 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(1), l1);
2418 break;
2419 case 3: /* oge (=0 or =1) */
2420 tcg_gen_brcond_i32(TCG_COND_LEU, flag, tcg_const_i32(1), l1);
2421 break;
2422 case 4: /* olt (=-1) */
2423 tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(0), l1);
2424 break;
2425 case 5: /* ole (=-1 or =0) */
2426 tcg_gen_brcond_i32(TCG_COND_LE, flag, tcg_const_i32(0), l1);
2427 break;
2428 case 6: /* ogl (=-1 or =1) */
2429 tcg_gen_andi_i32(flag, flag, 1);
2430 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
2431 break;
2432 case 7: /* or (=2) */
2433 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(2), l1);
2434 break;
2435 case 8: /* un (<2) */
2436 tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(2), l1);
2437 break;
2438 case 9: /* ueq (=0 or =2) */
2439 tcg_gen_andi_i32(flag, flag, 1);
2440 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
2441 break;
2442 case 10: /* ugt (>0) */
2443 tcg_gen_brcond_i32(TCG_COND_GT, flag, tcg_const_i32(0), l1);
2444 break;
2445 case 11: /* uge (>=0) */
2446 tcg_gen_brcond_i32(TCG_COND_GE, flag, tcg_const_i32(0), l1);
2447 break;
2448 case 12: /* ult (=-1 or =2) */
2449 tcg_gen_brcond_i32(TCG_COND_GEU, flag, tcg_const_i32(2), l1);
2450 break;
2451 case 13: /* ule (!=1) */
2452 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(1), l1);
2453 break;
2454 case 14: /* ne (!=0) */
2455 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
2456 break;
2457 case 15: /* t */
2458 tcg_gen_br(l1);
2459 break;
2460 }
2461 gen_jmp_tb(s, 0, s->pc);
2462 gen_set_label(l1);
2463 gen_jmp_tb(s, 1, addr + offset);
2464 }
2465
2466 DISAS_INSN(frestore)
2467 {
2468 M68kCPU *cpu = m68k_env_get_cpu(env);
2469
2470 /* TODO: Implement frestore. */
2471 cpu_abort(CPU(cpu), "FRESTORE not implemented");
2472 }
2473
2474 DISAS_INSN(fsave)
2475 {
2476 M68kCPU *cpu = m68k_env_get_cpu(env);
2477
2478 /* TODO: Implement fsave. */
2479 cpu_abort(CPU(cpu), "FSAVE not implemented");
2480 }
2481
2482 static inline TCGv gen_mac_extract_word(DisasContext *s, TCGv val, int upper)
2483 {
2484 TCGv tmp = tcg_temp_new();
2485 if (s->env->macsr & MACSR_FI) {
2486 if (upper)
2487 tcg_gen_andi_i32(tmp, val, 0xffff0000);
2488 else
2489 tcg_gen_shli_i32(tmp, val, 16);
2490 } else if (s->env->macsr & MACSR_SU) {
2491 if (upper)
2492 tcg_gen_sari_i32(tmp, val, 16);
2493 else
2494 tcg_gen_ext16s_i32(tmp, val);
2495 } else {
2496 if (upper)
2497 tcg_gen_shri_i32(tmp, val, 16);
2498 else
2499 tcg_gen_ext16u_i32(tmp, val);
2500 }
2501 return tmp;
2502 }
2503
2504 static void gen_mac_clear_flags(void)
2505 {
2506 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR,
2507 ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV));
2508 }
2509
2510 DISAS_INSN(mac)
2511 {
2512 TCGv rx;
2513 TCGv ry;
2514 uint16_t ext;
2515 int acc;
2516 TCGv tmp;
2517 TCGv addr;
2518 TCGv loadval;
2519 int dual;
2520 TCGv saved_flags;
2521
2522 if (!s->done_mac) {
2523 s->mactmp = tcg_temp_new_i64();
2524 s->done_mac = 1;
2525 }
2526
2527 ext = cpu_lduw_code(env, s->pc);
2528 s->pc += 2;
2529
2530 acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
2531 dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
2532 if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) {
2533 disas_undef(env, s, insn);
2534 return;
2535 }
2536 if (insn & 0x30) {
2537 /* MAC with load. */
2538 tmp = gen_lea(env, s, insn, OS_LONG);
2539 addr = tcg_temp_new();
2540 tcg_gen_and_i32(addr, tmp, QREG_MAC_MASK);
2541 /* Load the value now to ensure correct exception behavior.
2542 Perform writeback after reading the MAC inputs. */
2543 loadval = gen_load(s, OS_LONG, addr, 0);
2544
2545 acc ^= 1;
2546 rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
2547 ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
2548 } else {
2549 loadval = addr = NULL_QREG;
2550 rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2551 ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2552 }
2553
2554 gen_mac_clear_flags();
2555 #if 0
2556 l1 = -1;
2557 /* Disabled because conditional branches clobber temporary vars. */
2558 if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
2559 /* Skip the multiply if we know we will ignore it. */
2560 l1 = gen_new_label();
2561 tmp = tcg_temp_new();
2562 tcg_gen_andi_i32(tmp, QREG_MACSR, 1 << (acc + 8));
2563 gen_op_jmp_nz32(tmp, l1);
2564 }
2565 #endif
2566
2567 if ((ext & 0x0800) == 0) {
2568 /* Word. */
2569 rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
2570 ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
2571 }
2572 if (s->env->macsr & MACSR_FI) {
2573 gen_helper_macmulf(s->mactmp, cpu_env, rx, ry);
2574 } else {
2575 if (s->env->macsr & MACSR_SU)
2576 gen_helper_macmuls(s->mactmp, cpu_env, rx, ry);
2577 else
2578 gen_helper_macmulu(s->mactmp, cpu_env, rx, ry);
2579 switch ((ext >> 9) & 3) {
2580 case 1:
2581 tcg_gen_shli_i64(s->mactmp, s->mactmp, 1);
2582 break;
2583 case 3:
2584 tcg_gen_shri_i64(s->mactmp, s->mactmp, 1);
2585 break;
2586 }
2587 }
2588
2589 if (dual) {
2590 /* Save the overflow flag from the multiply. */
2591 saved_flags = tcg_temp_new();
2592 tcg_gen_mov_i32(saved_flags, QREG_MACSR);
2593 } else {
2594 saved_flags = NULL_QREG;
2595 }
2596
2597 #if 0
2598 /* Disabled because conditional branches clobber temporary vars. */
2599 if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
2600 /* Skip the accumulate if the value is already saturated. */
2601 l1 = gen_new_label();
2602 tmp = tcg_temp_new();
2603 gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
2604 gen_op_jmp_nz32(tmp, l1);
2605 }
2606 #endif
2607
2608 if (insn & 0x100)
2609 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
2610 else
2611 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
2612
2613 if (s->env->macsr & MACSR_FI)
2614 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
2615 else if (s->env->macsr & MACSR_SU)
2616 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
2617 else
2618 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
2619
2620 #if 0
2621 /* Disabled because conditional branches clobber temporary vars. */
2622 if (l1 != -1)
2623 gen_set_label(l1);
2624 #endif
2625
2626 if (dual) {
2627 /* Dual accumulate variant. */
2628 acc = (ext >> 2) & 3;
2629 /* Restore the overflow flag from the multiplier. */
2630 tcg_gen_mov_i32(QREG_MACSR, saved_flags);
2631 #if 0
2632 /* Disabled because conditional branches clobber temporary vars. */
2633 if ((s->env->macsr & MACSR_OMC) != 0) {
2634 /* Skip the accumulate if the value is already saturated. */
2635 l1 = gen_new_label();
2636 tmp = tcg_temp_new();
2637 gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
2638 gen_op_jmp_nz32(tmp, l1);
2639 }
2640 #endif
2641 if (ext & 2)
2642 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
2643 else
2644 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
2645 if (s->env->macsr & MACSR_FI)
2646 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
2647 else if (s->env->macsr & MACSR_SU)
2648 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
2649 else
2650 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
2651 #if 0
2652 /* Disabled because conditional branches clobber temporary vars. */
2653 if (l1 != -1)
2654 gen_set_label(l1);
2655 #endif
2656 }
2657 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(acc));
2658
2659 if (insn & 0x30) {
2660 TCGv rw;
2661 rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2662 tcg_gen_mov_i32(rw, loadval);
2663 /* FIXME: Should address writeback happen with the masked or
2664 unmasked value? */
2665 switch ((insn >> 3) & 7) {
2666 case 3: /* Post-increment. */
2667 tcg_gen_addi_i32(AREG(insn, 0), addr, 4);
2668 break;
2669 case 4: /* Pre-decrement. */
2670 tcg_gen_mov_i32(AREG(insn, 0), addr);
2671 }
2672 }
2673 }
2674
2675 DISAS_INSN(from_mac)
2676 {
2677 TCGv rx;
2678 TCGv_i64 acc;
2679 int accnum;
2680
2681 rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2682 accnum = (insn >> 9) & 3;
2683 acc = MACREG(accnum);
2684 if (s->env->macsr & MACSR_FI) {
2685 gen_helper_get_macf(rx, cpu_env, acc);
2686 } else if ((s->env->macsr & MACSR_OMC) == 0) {
2687 tcg_gen_trunc_i64_i32(rx, acc);
2688 } else if (s->env->macsr & MACSR_SU) {
2689 gen_helper_get_macs(rx, acc);
2690 } else {
2691 gen_helper_get_macu(rx, acc);
2692 }
2693 if (insn & 0x40) {
2694 tcg_gen_movi_i64(acc, 0);
2695 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
2696 }
2697 }
2698
2699 DISAS_INSN(move_mac)
2700 {
2701 /* FIXME: This can be done without a helper. */
2702 int src;
2703 TCGv dest;
2704 src = insn & 3;
2705 dest = tcg_const_i32((insn >> 9) & 3);
2706 gen_helper_mac_move(cpu_env, dest, tcg_const_i32(src));
2707 gen_mac_clear_flags();
2708 gen_helper_mac_set_flags(cpu_env, dest);
2709 }
2710
2711 DISAS_INSN(from_macsr)
2712 {
2713 TCGv reg;
2714
2715 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2716 tcg_gen_mov_i32(reg, QREG_MACSR);
2717 }
2718
2719 DISAS_INSN(from_mask)
2720 {
2721 TCGv reg;
2722 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2723 tcg_gen_mov_i32(reg, QREG_MAC_MASK);
2724 }
2725
2726 DISAS_INSN(from_mext)
2727 {
2728 TCGv reg;
2729 TCGv acc;
2730 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2731 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
2732 if (s->env->macsr & MACSR_FI)
2733 gen_helper_get_mac_extf(reg, cpu_env, acc);
2734 else
2735 gen_helper_get_mac_exti(reg, cpu_env, acc);
2736 }
2737
2738 DISAS_INSN(macsr_to_ccr)
2739 {
2740 tcg_gen_movi_i32(QREG_CC_X, 0);
2741 tcg_gen_andi_i32(QREG_CC_DEST, QREG_MACSR, 0xf);
2742 s->cc_op = CC_OP_FLAGS;
2743 }
2744
2745 DISAS_INSN(to_mac)
2746 {
2747 TCGv_i64 acc;
2748 TCGv val;
2749 int accnum;
2750 accnum = (insn >> 9) & 3;
2751 acc = MACREG(accnum);
2752 SRC_EA(env, val, OS_LONG, 0, NULL);
2753 if (s->env->macsr & MACSR_FI) {
2754 tcg_gen_ext_i32_i64(acc, val);
2755 tcg_gen_shli_i64(acc, acc, 8);
2756 } else if (s->env->macsr & MACSR_SU) {
2757 tcg_gen_ext_i32_i64(acc, val);
2758 } else {
2759 tcg_gen_extu_i32_i64(acc, val);
2760 }
2761 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
2762 gen_mac_clear_flags();
2763 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(accnum));
2764 }
2765
2766 DISAS_INSN(to_macsr)
2767 {
2768 TCGv val;
2769 SRC_EA(env, val, OS_LONG, 0, NULL);
2770 gen_helper_set_macsr(cpu_env, val);
2771 gen_lookup_tb(s);
2772 }
2773
2774 DISAS_INSN(to_mask)
2775 {
2776 TCGv val;
2777 SRC_EA(env, val, OS_LONG, 0, NULL);
2778 tcg_gen_ori_i32(QREG_MAC_MASK, val, 0xffff0000);
2779 }
2780
2781 DISAS_INSN(to_mext)
2782 {
2783 TCGv val;
2784 TCGv acc;
2785 SRC_EA(env, val, OS_LONG, 0, NULL);
2786 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
2787 if (s->env->macsr & MACSR_FI)
2788 gen_helper_set_mac_extf(cpu_env, val, acc);
2789 else if (s->env->macsr & MACSR_SU)
2790 gen_helper_set_mac_exts(cpu_env, val, acc);
2791 else
2792 gen_helper_set_mac_extu(cpu_env, val, acc);
2793 }
2794
2795 static disas_proc opcode_table[65536];
2796
2797 static void
2798 register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
2799 {
2800 int i;
2801 int from;
2802 int to;
2803
2804 /* Sanity check. All set bits must be included in the mask. */
2805 if (opcode & ~mask) {
2806 fprintf(stderr,
2807 "qemu internal error: bogus opcode definition %04x/%04x\n",
2808 opcode, mask);
2809 abort();
2810 }
2811 /* This could probably be cleverer. For now just optimize the case where
2812 the top bits are known. */
2813 /* Find the first zero bit in the mask. */
2814 i = 0x8000;
2815 while ((i & mask) != 0)
2816 i >>= 1;
2817 /* Iterate over all combinations of this and lower bits. */
2818 if (i == 0)
2819 i = 1;
2820 else
2821 i <<= 1;
2822 from = opcode & ~(i - 1);
2823 to = from + i;
2824 for (i = from; i < to; i++) {
2825 if ((i & mask) == opcode)
2826 opcode_table[i] = proc;
2827 }
2828 }
2829
2830 /* Register m68k opcode handlers. Order is important.
2831 Later insn override earlier ones. */
2832 void register_m68k_insns (CPUM68KState *env)
2833 {
2834 #define INSN(name, opcode, mask, feature) do { \
2835 if (m68k_feature(env, M68K_FEATURE_##feature)) \
2836 register_opcode(disas_##name, 0x##opcode, 0x##mask); \
2837 } while(0)
2838 INSN(undef, 0000, 0000, CF_ISA_A);
2839 INSN(arith_im, 0080, fff8, CF_ISA_A);
2840 INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
2841 INSN(bitop_reg, 0100, f1c0, CF_ISA_A);
2842 INSN(bitop_reg, 0140, f1c0, CF_ISA_A);
2843 INSN(bitop_reg, 0180, f1c0, CF_ISA_A);
2844 INSN(bitop_reg, 01c0, f1c0, CF_ISA_A);
2845 INSN(arith_im, 0280, fff8, CF_ISA_A);
2846 INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
2847 INSN(arith_im, 0480, fff8, CF_ISA_A);
2848 INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
2849 INSN(arith_im, 0680, fff8, CF_ISA_A);
2850 INSN(bitop_im, 0800, ffc0, CF_ISA_A);
2851 INSN(bitop_im, 0840, ffc0, CF_ISA_A);
2852 INSN(bitop_im, 0880, ffc0, CF_ISA_A);
2853 INSN(bitop_im, 08c0, ffc0, CF_ISA_A);
2854 INSN(arith_im, 0a80, fff8, CF_ISA_A);
2855 INSN(arith_im, 0c00, ff38, CF_ISA_A);
2856 INSN(move, 1000, f000, CF_ISA_A);
2857 INSN(move, 2000, f000, CF_ISA_A);
2858 INSN(move, 3000, f000, CF_ISA_A);
2859 INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC);
2860 INSN(negx, 4080, fff8, CF_ISA_A);
2861 INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
2862 INSN(lea, 41c0, f1c0, CF_ISA_A);
2863 INSN(clr, 4200, ff00, CF_ISA_A);
2864 INSN(undef, 42c0, ffc0, CF_ISA_A);
2865 INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
2866 INSN(neg, 4480, fff8, CF_ISA_A);
2867 INSN(move_to_ccr, 44c0, ffc0, CF_ISA_A);
2868 INSN(not, 4680, fff8, CF_ISA_A);
2869 INSN(move_to_sr, 46c0, ffc0, CF_ISA_A);
2870 INSN(pea, 4840, ffc0, CF_ISA_A);
2871 INSN(swap, 4840, fff8, CF_ISA_A);
2872 INSN(movem, 48c0, fbc0, CF_ISA_A);
2873 INSN(ext, 4880, fff8, CF_ISA_A);
2874 INSN(ext, 48c0, fff8, CF_ISA_A);
2875 INSN(ext, 49c0, fff8, CF_ISA_A);
2876 INSN(tst, 4a00, ff00, CF_ISA_A);
2877 INSN(tas, 4ac0, ffc0, CF_ISA_B);
2878 INSN(halt, 4ac8, ffff, CF_ISA_A);
2879 INSN(pulse, 4acc, ffff, CF_ISA_A);
2880 INSN(illegal, 4afc, ffff, CF_ISA_A);
2881 INSN(mull, 4c00, ffc0, CF_ISA_A);
2882 INSN(divl, 4c40, ffc0, CF_ISA_A);
2883 INSN(sats, 4c80, fff8, CF_ISA_B);
2884 INSN(trap, 4e40, fff0, CF_ISA_A);
2885 INSN(link, 4e50, fff8, CF_ISA_A);
2886 INSN(unlk, 4e58, fff8, CF_ISA_A);
2887 INSN(move_to_usp, 4e60, fff8, USP);
2888 INSN(move_from_usp, 4e68, fff8, USP);
2889 INSN(nop, 4e71, ffff, CF_ISA_A);
2890 INSN(stop, 4e72, ffff, CF_ISA_A);
2891 INSN(rte, 4e73, ffff, CF_ISA_A);
2892 INSN(rts, 4e75, ffff, CF_ISA_A);
2893 INSN(movec, 4e7b, ffff, CF_ISA_A);
2894 INSN(jump, 4e80, ffc0, CF_ISA_A);
2895 INSN(jump, 4ec0, ffc0, CF_ISA_A);
2896 INSN(addsubq, 5180, f1c0, CF_ISA_A);
2897 INSN(scc, 50c0, f0f8, CF_ISA_A);
2898 INSN(addsubq, 5080, f1c0, CF_ISA_A);
2899 INSN(tpf, 51f8, fff8, CF_ISA_A);
2900
2901 /* Branch instructions. */
2902 INSN(branch, 6000, f000, CF_ISA_A);
2903 /* Disable long branch instructions, then add back the ones we want. */
2904 INSN(undef, 60ff, f0ff, CF_ISA_A); /* All long branches. */
2905 INSN(branch, 60ff, f0ff, CF_ISA_B);
2906 INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */
2907 INSN(branch, 60ff, ffff, BRAL);
2908
2909 INSN(moveq, 7000, f100, CF_ISA_A);
2910 INSN(mvzs, 7100, f100, CF_ISA_B);
2911 INSN(or, 8000, f000, CF_ISA_A);
2912 INSN(divw, 80c0, f0c0, CF_ISA_A);
2913 INSN(addsub, 9000, f000, CF_ISA_A);
2914 INSN(subx, 9180, f1f8, CF_ISA_A);
2915 INSN(suba, 91c0, f1c0, CF_ISA_A);
2916
2917 INSN(undef_mac, a000, f000, CF_ISA_A);
2918 INSN(mac, a000, f100, CF_EMAC);
2919 INSN(from_mac, a180, f9b0, CF_EMAC);
2920 INSN(move_mac, a110, f9fc, CF_EMAC);
2921 INSN(from_macsr,a980, f9f0, CF_EMAC);
2922 INSN(from_mask, ad80, fff0, CF_EMAC);
2923 INSN(from_mext, ab80, fbf0, CF_EMAC);
2924 INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
2925 INSN(to_mac, a100, f9c0, CF_EMAC);
2926 INSN(to_macsr, a900, ffc0, CF_EMAC);
2927 INSN(to_mext, ab00, fbc0, CF_EMAC);
2928 INSN(to_mask, ad00, ffc0, CF_EMAC);
2929
2930 INSN(mov3q, a140, f1c0, CF_ISA_B);
2931 INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
2932 INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
2933 INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
2934 INSN(cmp, b080, f1c0, CF_ISA_A);
2935 INSN(cmpa, b1c0, f1c0, CF_ISA_A);
2936 INSN(eor, b180, f1c0, CF_ISA_A);
2937 INSN(and, c000, f000, CF_ISA_A);
2938 INSN(mulw, c0c0, f0c0, CF_ISA_A);
2939 INSN(addsub, d000, f000, CF_ISA_A);
2940 INSN(addx, d180, f1f8, CF_ISA_A);
2941 INSN(adda, d1c0, f1c0, CF_ISA_A);
2942 INSN(shift_im, e080, f0f0, CF_ISA_A);
2943 INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
2944 INSN(undef_fpu, f000, f000, CF_ISA_A);
2945 INSN(fpu, f200, ffc0, CF_FPU);
2946 INSN(fbcc, f280, ffc0, CF_FPU);
2947 INSN(frestore, f340, ffc0, CF_FPU);
2948 INSN(fsave, f340, ffc0, CF_FPU);
2949 INSN(intouch, f340, ffc0, CF_ISA_A);
2950 INSN(cpushl, f428, ff38, CF_ISA_A);
2951 INSN(wddata, fb00, ff00, CF_ISA_A);
2952 INSN(wdebug, fbc0, ffc0, CF_ISA_A);
2953 #undef INSN
2954 }
2955
2956 /* ??? Some of this implementation is not exception safe. We should always
2957 write back the result to memory before setting the condition codes. */
2958 static void disas_m68k_insn(CPUM68KState * env, DisasContext *s)
2959 {
2960 uint16_t insn;
2961
2962 if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
2963 tcg_gen_debug_insn_start(s->pc);
2964 }
2965
2966 insn = cpu_lduw_code(env, s->pc);
2967 s->pc += 2;
2968
2969 opcode_table[insn](env, s, insn);
2970 }
2971
2972 /* generate intermediate code for basic block 'tb'. */
2973 static inline void
2974 gen_intermediate_code_internal(M68kCPU *cpu, TranslationBlock *tb,
2975 bool search_pc)
2976 {
2977 CPUState *cs = CPU(cpu);
2978 CPUM68KState *env = &cpu->env;
2979 DisasContext dc1, *dc = &dc1;
2980 uint16_t *gen_opc_end;
2981 CPUBreakpoint *bp;
2982 int j, lj;
2983 target_ulong pc_start;
2984 int pc_offset;
2985 int num_insns;
2986 int max_insns;
2987
2988 /* generate intermediate code */
2989 pc_start = tb->pc;
2990
2991 dc->tb = tb;
2992
2993 gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE;
2994
2995 dc->env = env;
2996 dc->is_jmp = DISAS_NEXT;
2997 dc->pc = pc_start;
2998 dc->cc_op = CC_OP_DYNAMIC;
2999 dc->singlestep_enabled = cs->singlestep_enabled;
3000 dc->fpcr = env->fpcr;
3001 dc->user = (env->sr & SR_S) == 0;
3002 dc->is_mem = 0;
3003 dc->done_mac = 0;
3004 lj = -1;
3005 num_insns = 0;
3006 max_insns = tb->cflags & CF_COUNT_MASK;
3007 if (max_insns == 0)
3008 max_insns = CF_COUNT_MASK;
3009
3010 gen_tb_start();
3011 do {
3012 pc_offset = dc->pc - pc_start;
3013 gen_throws_exception = NULL;
3014 if (unlikely(!QTAILQ_EMPTY(&cs->breakpoints))) {
3015 QTAILQ_FOREACH(bp, &cs->breakpoints, entry) {
3016 if (bp->pc == dc->pc) {
3017 gen_exception(dc, dc->pc, EXCP_DEBUG);
3018 dc->is_jmp = DISAS_JUMP;
3019 break;
3020 }
3021 }
3022 if (dc->is_jmp)
3023 break;
3024 }
3025 if (search_pc) {
3026 j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
3027 if (lj < j) {
3028 lj++;
3029 while (lj < j)
3030 tcg_ctx.gen_opc_instr_start[lj++] = 0;
3031 }
3032 tcg_ctx.gen_opc_pc[lj] = dc->pc;
3033 tcg_ctx.gen_opc_instr_start[lj] = 1;
3034 tcg_ctx.gen_opc_icount[lj] = num_insns;
3035 }
3036 if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
3037 gen_io_start();
3038 dc->insn_pc = dc->pc;
3039 disas_m68k_insn(env, dc);
3040 num_insns++;
3041 } while (!dc->is_jmp && tcg_ctx.gen_opc_ptr < gen_opc_end &&
3042 !cs->singlestep_enabled &&
3043 !singlestep &&
3044 (pc_offset) < (TARGET_PAGE_SIZE - 32) &&
3045 num_insns < max_insns);
3046
3047 if (tb->cflags & CF_LAST_IO)
3048 gen_io_end();
3049 if (unlikely(cs->singlestep_enabled)) {
3050 /* Make sure the pc is updated, and raise a debug exception. */
3051 if (!dc->is_jmp) {
3052 gen_flush_cc_op(dc);
3053 tcg_gen_movi_i32(QREG_PC, dc->pc);
3054 }
3055 gen_helper_raise_exception(cpu_env, tcg_const_i32(EXCP_DEBUG));
3056 } else {
3057 switch(dc->is_jmp) {
3058 case DISAS_NEXT:
3059 gen_flush_cc_op(dc);
3060 gen_jmp_tb(dc, 0, dc->pc);
3061 break;
3062 default:
3063 case DISAS_JUMP:
3064 case DISAS_UPDATE:
3065 gen_flush_cc_op(dc);
3066 /* indicate that the hash table must be used to find the next TB */
3067 tcg_gen_exit_tb(0);
3068 break;
3069 case DISAS_TB_JUMP:
3070 /* nothing more to generate */
3071 break;
3072 }
3073 }
3074 gen_tb_end(tb, num_insns);
3075 *tcg_ctx.gen_opc_ptr = INDEX_op_end;
3076
3077 #ifdef DEBUG_DISAS
3078 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
3079 qemu_log("----------------\n");
3080 qemu_log("IN: %s\n", lookup_symbol(pc_start));
3081 log_target_disas(env, pc_start, dc->pc - pc_start, 0);
3082 qemu_log("\n");
3083 }
3084 #endif
3085 if (search_pc) {
3086 j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
3087 lj++;
3088 while (lj <= j)
3089 tcg_ctx.gen_opc_instr_start[lj++] = 0;
3090 } else {
3091 tb->size = dc->pc - pc_start;
3092 tb->icount = num_insns;
3093 }
3094
3095 //optimize_flags();
3096 //expand_target_qops();
3097 }
3098
3099 void gen_intermediate_code(CPUM68KState *env, TranslationBlock *tb)
3100 {
3101 gen_intermediate_code_internal(m68k_env_get_cpu(env), tb, false);
3102 }
3103
3104 void gen_intermediate_code_pc(CPUM68KState *env, TranslationBlock *tb)
3105 {
3106 gen_intermediate_code_internal(m68k_env_get_cpu(env), tb, true);
3107 }
3108
3109 void m68k_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
3110 int flags)
3111 {
3112 M68kCPU *cpu = M68K_CPU(cs);
3113 CPUM68KState *env = &cpu->env;
3114 int i;
3115 uint16_t sr;
3116 CPU_DoubleU u;
3117 for (i = 0; i < 8; i++)
3118 {
3119 u.d = env->fregs[i];
3120 cpu_fprintf (f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n",
3121 i, env->dregs[i], i, env->aregs[i],
3122 i, u.l.upper, u.l.lower, *(double *)&u.d);
3123 }
3124 cpu_fprintf (f, "PC = %08x ", env->pc);
3125 sr = env->sr;
3126 cpu_fprintf (f, "SR = %04x %c%c%c%c%c ", sr, (sr & 0x10) ? 'X' : '-',
3127 (sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-',
3128 (sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-');
3129 cpu_fprintf (f, "FPRESULT = %12g\n", *(double *)&env->fp_result);
3130 }
3131
3132 void restore_state_to_opc(CPUM68KState *env, TranslationBlock *tb, int pc_pos)
3133 {
3134 env->pc = tcg_ctx.gen_opc_pc[pc_pos];
3135 }
QEmu