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cpu: Move breakpoints field from CPU_COMMON to CPUState
[qemu.git] / target-m68k / translate.c
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 gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
885 cpu_abort(env, "Illegal instruction: %04x @ %08x", insn, s->pc - 2);
886 }
887
888 DISAS_INSN(mulw)
889 {
890 TCGv reg;
891 TCGv tmp;
892 TCGv src;
893 int sign;
894
895 sign = (insn & 0x100) != 0;
896 reg = DREG(insn, 9);
897 tmp = tcg_temp_new();
898 if (sign)
899 tcg_gen_ext16s_i32(tmp, reg);
900 else
901 tcg_gen_ext16u_i32(tmp, reg);
902 SRC_EA(env, src, OS_WORD, sign, NULL);
903 tcg_gen_mul_i32(tmp, tmp, src);
904 tcg_gen_mov_i32(reg, tmp);
905 /* Unlike m68k, coldfire always clears the overflow bit. */
906 gen_logic_cc(s, tmp);
907 }
908
909 DISAS_INSN(divw)
910 {
911 TCGv reg;
912 TCGv tmp;
913 TCGv src;
914 int sign;
915
916 sign = (insn & 0x100) != 0;
917 reg = DREG(insn, 9);
918 if (sign) {
919 tcg_gen_ext16s_i32(QREG_DIV1, reg);
920 } else {
921 tcg_gen_ext16u_i32(QREG_DIV1, reg);
922 }
923 SRC_EA(env, src, OS_WORD, sign, NULL);
924 tcg_gen_mov_i32(QREG_DIV2, src);
925 if (sign) {
926 gen_helper_divs(cpu_env, tcg_const_i32(1));
927 } else {
928 gen_helper_divu(cpu_env, tcg_const_i32(1));
929 }
930
931 tmp = tcg_temp_new();
932 src = tcg_temp_new();
933 tcg_gen_ext16u_i32(tmp, QREG_DIV1);
934 tcg_gen_shli_i32(src, QREG_DIV2, 16);
935 tcg_gen_or_i32(reg, tmp, src);
936 s->cc_op = CC_OP_FLAGS;
937 }
938
939 DISAS_INSN(divl)
940 {
941 TCGv num;
942 TCGv den;
943 TCGv reg;
944 uint16_t ext;
945
946 ext = cpu_lduw_code(env, s->pc);
947 s->pc += 2;
948 if (ext & 0x87f8) {
949 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
950 return;
951 }
952 num = DREG(ext, 12);
953 reg = DREG(ext, 0);
954 tcg_gen_mov_i32(QREG_DIV1, num);
955 SRC_EA(env, den, OS_LONG, 0, NULL);
956 tcg_gen_mov_i32(QREG_DIV2, den);
957 if (ext & 0x0800) {
958 gen_helper_divs(cpu_env, tcg_const_i32(0));
959 } else {
960 gen_helper_divu(cpu_env, tcg_const_i32(0));
961 }
962 if ((ext & 7) == ((ext >> 12) & 7)) {
963 /* div */
964 tcg_gen_mov_i32 (reg, QREG_DIV1);
965 } else {
966 /* rem */
967 tcg_gen_mov_i32 (reg, QREG_DIV2);
968 }
969 s->cc_op = CC_OP_FLAGS;
970 }
971
972 DISAS_INSN(addsub)
973 {
974 TCGv reg;
975 TCGv dest;
976 TCGv src;
977 TCGv tmp;
978 TCGv addr;
979 int add;
980
981 add = (insn & 0x4000) != 0;
982 reg = DREG(insn, 9);
983 dest = tcg_temp_new();
984 if (insn & 0x100) {
985 SRC_EA(env, tmp, OS_LONG, 0, &addr);
986 src = reg;
987 } else {
988 tmp = reg;
989 SRC_EA(env, src, OS_LONG, 0, NULL);
990 }
991 if (add) {
992 tcg_gen_add_i32(dest, tmp, src);
993 gen_helper_xflag_lt(QREG_CC_X, dest, src);
994 s->cc_op = CC_OP_ADD;
995 } else {
996 gen_helper_xflag_lt(QREG_CC_X, tmp, src);
997 tcg_gen_sub_i32(dest, tmp, src);
998 s->cc_op = CC_OP_SUB;
999 }
1000 gen_update_cc_add(dest, src);
1001 if (insn & 0x100) {
1002 DEST_EA(env, insn, OS_LONG, dest, &addr);
1003 } else {
1004 tcg_gen_mov_i32(reg, dest);
1005 }
1006 }
1007
1008
1009 /* Reverse the order of the bits in REG. */
1010 DISAS_INSN(bitrev)
1011 {
1012 TCGv reg;
1013 reg = DREG(insn, 0);
1014 gen_helper_bitrev(reg, reg);
1015 }
1016
1017 DISAS_INSN(bitop_reg)
1018 {
1019 int opsize;
1020 int op;
1021 TCGv src1;
1022 TCGv src2;
1023 TCGv tmp;
1024 TCGv addr;
1025 TCGv dest;
1026
1027 if ((insn & 0x38) != 0)
1028 opsize = OS_BYTE;
1029 else
1030 opsize = OS_LONG;
1031 op = (insn >> 6) & 3;
1032 SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
1033 src2 = DREG(insn, 9);
1034 dest = tcg_temp_new();
1035
1036 gen_flush_flags(s);
1037 tmp = tcg_temp_new();
1038 if (opsize == OS_BYTE)
1039 tcg_gen_andi_i32(tmp, src2, 7);
1040 else
1041 tcg_gen_andi_i32(tmp, src2, 31);
1042 src2 = tmp;
1043 tmp = tcg_temp_new();
1044 tcg_gen_shr_i32(tmp, src1, src2);
1045 tcg_gen_andi_i32(tmp, tmp, 1);
1046 tcg_gen_shli_i32(tmp, tmp, 2);
1047 /* Clear CCF_Z if bit set. */
1048 tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
1049 tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1050
1051 tcg_gen_shl_i32(tmp, tcg_const_i32(1), src2);
1052 switch (op) {
1053 case 1: /* bchg */
1054 tcg_gen_xor_i32(dest, src1, tmp);
1055 break;
1056 case 2: /* bclr */
1057 tcg_gen_not_i32(tmp, tmp);
1058 tcg_gen_and_i32(dest, src1, tmp);
1059 break;
1060 case 3: /* bset */
1061 tcg_gen_or_i32(dest, src1, tmp);
1062 break;
1063 default: /* btst */
1064 break;
1065 }
1066 if (op)
1067 DEST_EA(env, insn, opsize, dest, &addr);
1068 }
1069
1070 DISAS_INSN(sats)
1071 {
1072 TCGv reg;
1073 reg = DREG(insn, 0);
1074 gen_flush_flags(s);
1075 gen_helper_sats(reg, reg, QREG_CC_DEST);
1076 gen_logic_cc(s, reg);
1077 }
1078
1079 static void gen_push(DisasContext *s, TCGv val)
1080 {
1081 TCGv tmp;
1082
1083 tmp = tcg_temp_new();
1084 tcg_gen_subi_i32(tmp, QREG_SP, 4);
1085 gen_store(s, OS_LONG, tmp, val);
1086 tcg_gen_mov_i32(QREG_SP, tmp);
1087 }
1088
1089 DISAS_INSN(movem)
1090 {
1091 TCGv addr;
1092 int i;
1093 uint16_t mask;
1094 TCGv reg;
1095 TCGv tmp;
1096 int is_load;
1097
1098 mask = cpu_lduw_code(env, s->pc);
1099 s->pc += 2;
1100 tmp = gen_lea(env, s, insn, OS_LONG);
1101 if (IS_NULL_QREG(tmp)) {
1102 gen_addr_fault(s);
1103 return;
1104 }
1105 addr = tcg_temp_new();
1106 tcg_gen_mov_i32(addr, tmp);
1107 is_load = ((insn & 0x0400) != 0);
1108 for (i = 0; i < 16; i++, mask >>= 1) {
1109 if (mask & 1) {
1110 if (i < 8)
1111 reg = DREG(i, 0);
1112 else
1113 reg = AREG(i, 0);
1114 if (is_load) {
1115 tmp = gen_load(s, OS_LONG, addr, 0);
1116 tcg_gen_mov_i32(reg, tmp);
1117 } else {
1118 gen_store(s, OS_LONG, addr, reg);
1119 }
1120 if (mask != 1)
1121 tcg_gen_addi_i32(addr, addr, 4);
1122 }
1123 }
1124 }
1125
1126 DISAS_INSN(bitop_im)
1127 {
1128 int opsize;
1129 int op;
1130 TCGv src1;
1131 uint32_t mask;
1132 int bitnum;
1133 TCGv tmp;
1134 TCGv addr;
1135
1136 if ((insn & 0x38) != 0)
1137 opsize = OS_BYTE;
1138 else
1139 opsize = OS_LONG;
1140 op = (insn >> 6) & 3;
1141
1142 bitnum = cpu_lduw_code(env, s->pc);
1143 s->pc += 2;
1144 if (bitnum & 0xff00) {
1145 disas_undef(env, s, insn);
1146 return;
1147 }
1148
1149 SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
1150
1151 gen_flush_flags(s);
1152 if (opsize == OS_BYTE)
1153 bitnum &= 7;
1154 else
1155 bitnum &= 31;
1156 mask = 1 << bitnum;
1157
1158 tmp = tcg_temp_new();
1159 assert (CCF_Z == (1 << 2));
1160 if (bitnum > 2)
1161 tcg_gen_shri_i32(tmp, src1, bitnum - 2);
1162 else if (bitnum < 2)
1163 tcg_gen_shli_i32(tmp, src1, 2 - bitnum);
1164 else
1165 tcg_gen_mov_i32(tmp, src1);
1166 tcg_gen_andi_i32(tmp, tmp, CCF_Z);
1167 /* Clear CCF_Z if bit set. */
1168 tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
1169 tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1170 if (op) {
1171 switch (op) {
1172 case 1: /* bchg */
1173 tcg_gen_xori_i32(tmp, src1, mask);
1174 break;
1175 case 2: /* bclr */
1176 tcg_gen_andi_i32(tmp, src1, ~mask);
1177 break;
1178 case 3: /* bset */
1179 tcg_gen_ori_i32(tmp, src1, mask);
1180 break;
1181 default: /* btst */
1182 break;
1183 }
1184 DEST_EA(env, insn, opsize, tmp, &addr);
1185 }
1186 }
1187
1188 DISAS_INSN(arith_im)
1189 {
1190 int op;
1191 uint32_t im;
1192 TCGv src1;
1193 TCGv dest;
1194 TCGv addr;
1195
1196 op = (insn >> 9) & 7;
1197 SRC_EA(env, src1, OS_LONG, 0, (op == 6) ? NULL : &addr);
1198 im = read_im32(env, s);
1199 dest = tcg_temp_new();
1200 switch (op) {
1201 case 0: /* ori */
1202 tcg_gen_ori_i32(dest, src1, im);
1203 gen_logic_cc(s, dest);
1204 break;
1205 case 1: /* andi */
1206 tcg_gen_andi_i32(dest, src1, im);
1207 gen_logic_cc(s, dest);
1208 break;
1209 case 2: /* subi */
1210 tcg_gen_mov_i32(dest, src1);
1211 gen_helper_xflag_lt(QREG_CC_X, dest, tcg_const_i32(im));
1212 tcg_gen_subi_i32(dest, dest, im);
1213 gen_update_cc_add(dest, tcg_const_i32(im));
1214 s->cc_op = CC_OP_SUB;
1215 break;
1216 case 3: /* addi */
1217 tcg_gen_mov_i32(dest, src1);
1218 tcg_gen_addi_i32(dest, dest, im);
1219 gen_update_cc_add(dest, tcg_const_i32(im));
1220 gen_helper_xflag_lt(QREG_CC_X, dest, tcg_const_i32(im));
1221 s->cc_op = CC_OP_ADD;
1222 break;
1223 case 5: /* eori */
1224 tcg_gen_xori_i32(dest, src1, im);
1225 gen_logic_cc(s, dest);
1226 break;
1227 case 6: /* cmpi */
1228 tcg_gen_mov_i32(dest, src1);
1229 tcg_gen_subi_i32(dest, dest, im);
1230 gen_update_cc_add(dest, tcg_const_i32(im));
1231 s->cc_op = CC_OP_SUB;
1232 break;
1233 default:
1234 abort();
1235 }
1236 if (op != 6) {
1237 DEST_EA(env, insn, OS_LONG, dest, &addr);
1238 }
1239 }
1240
1241 DISAS_INSN(byterev)
1242 {
1243 TCGv reg;
1244
1245 reg = DREG(insn, 0);
1246 tcg_gen_bswap32_i32(reg, reg);
1247 }
1248
1249 DISAS_INSN(move)
1250 {
1251 TCGv src;
1252 TCGv dest;
1253 int op;
1254 int opsize;
1255
1256 switch (insn >> 12) {
1257 case 1: /* move.b */
1258 opsize = OS_BYTE;
1259 break;
1260 case 2: /* move.l */
1261 opsize = OS_LONG;
1262 break;
1263 case 3: /* move.w */
1264 opsize = OS_WORD;
1265 break;
1266 default:
1267 abort();
1268 }
1269 SRC_EA(env, src, opsize, 1, NULL);
1270 op = (insn >> 6) & 7;
1271 if (op == 1) {
1272 /* movea */
1273 /* The value will already have been sign extended. */
1274 dest = AREG(insn, 9);
1275 tcg_gen_mov_i32(dest, src);
1276 } else {
1277 /* normal move */
1278 uint16_t dest_ea;
1279 dest_ea = ((insn >> 9) & 7) | (op << 3);
1280 DEST_EA(env, dest_ea, opsize, src, NULL);
1281 /* This will be correct because loads sign extend. */
1282 gen_logic_cc(s, src);
1283 }
1284 }
1285
1286 DISAS_INSN(negx)
1287 {
1288 TCGv reg;
1289
1290 gen_flush_flags(s);
1291 reg = DREG(insn, 0);
1292 gen_helper_subx_cc(reg, cpu_env, tcg_const_i32(0), reg);
1293 }
1294
1295 DISAS_INSN(lea)
1296 {
1297 TCGv reg;
1298 TCGv tmp;
1299
1300 reg = AREG(insn, 9);
1301 tmp = gen_lea(env, s, insn, OS_LONG);
1302 if (IS_NULL_QREG(tmp)) {
1303 gen_addr_fault(s);
1304 return;
1305 }
1306 tcg_gen_mov_i32(reg, tmp);
1307 }
1308
1309 DISAS_INSN(clr)
1310 {
1311 int opsize;
1312
1313 switch ((insn >> 6) & 3) {
1314 case 0: /* clr.b */
1315 opsize = OS_BYTE;
1316 break;
1317 case 1: /* clr.w */
1318 opsize = OS_WORD;
1319 break;
1320 case 2: /* clr.l */
1321 opsize = OS_LONG;
1322 break;
1323 default:
1324 abort();
1325 }
1326 DEST_EA(env, insn, opsize, tcg_const_i32(0), NULL);
1327 gen_logic_cc(s, tcg_const_i32(0));
1328 }
1329
1330 static TCGv gen_get_ccr(DisasContext *s)
1331 {
1332 TCGv dest;
1333
1334 gen_flush_flags(s);
1335 dest = tcg_temp_new();
1336 tcg_gen_shli_i32(dest, QREG_CC_X, 4);
1337 tcg_gen_or_i32(dest, dest, QREG_CC_DEST);
1338 return dest;
1339 }
1340
1341 DISAS_INSN(move_from_ccr)
1342 {
1343 TCGv reg;
1344 TCGv ccr;
1345
1346 ccr = gen_get_ccr(s);
1347 reg = DREG(insn, 0);
1348 gen_partset_reg(OS_WORD, reg, ccr);
1349 }
1350
1351 DISAS_INSN(neg)
1352 {
1353 TCGv reg;
1354 TCGv src1;
1355
1356 reg = DREG(insn, 0);
1357 src1 = tcg_temp_new();
1358 tcg_gen_mov_i32(src1, reg);
1359 tcg_gen_neg_i32(reg, src1);
1360 s->cc_op = CC_OP_SUB;
1361 gen_update_cc_add(reg, src1);
1362 gen_helper_xflag_lt(QREG_CC_X, tcg_const_i32(0), src1);
1363 s->cc_op = CC_OP_SUB;
1364 }
1365
1366 static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
1367 {
1368 tcg_gen_movi_i32(QREG_CC_DEST, val & 0xf);
1369 tcg_gen_movi_i32(QREG_CC_X, (val & 0x10) >> 4);
1370 if (!ccr_only) {
1371 gen_helper_set_sr(cpu_env, tcg_const_i32(val & 0xff00));
1372 }
1373 }
1374
1375 static void gen_set_sr(CPUM68KState *env, DisasContext *s, uint16_t insn,
1376 int ccr_only)
1377 {
1378 TCGv tmp;
1379 TCGv reg;
1380
1381 s->cc_op = CC_OP_FLAGS;
1382 if ((insn & 0x38) == 0)
1383 {
1384 tmp = tcg_temp_new();
1385 reg = DREG(insn, 0);
1386 tcg_gen_andi_i32(QREG_CC_DEST, reg, 0xf);
1387 tcg_gen_shri_i32(tmp, reg, 4);
1388 tcg_gen_andi_i32(QREG_CC_X, tmp, 1);
1389 if (!ccr_only) {
1390 gen_helper_set_sr(cpu_env, reg);
1391 }
1392 }
1393 else if ((insn & 0x3f) == 0x3c)
1394 {
1395 uint16_t val;
1396 val = cpu_lduw_code(env, s->pc);
1397 s->pc += 2;
1398 gen_set_sr_im(s, val, ccr_only);
1399 }
1400 else
1401 disas_undef(env, s, insn);
1402 }
1403
1404 DISAS_INSN(move_to_ccr)
1405 {
1406 gen_set_sr(env, s, insn, 1);
1407 }
1408
1409 DISAS_INSN(not)
1410 {
1411 TCGv reg;
1412
1413 reg = DREG(insn, 0);
1414 tcg_gen_not_i32(reg, reg);
1415 gen_logic_cc(s, reg);
1416 }
1417
1418 DISAS_INSN(swap)
1419 {
1420 TCGv src1;
1421 TCGv src2;
1422 TCGv reg;
1423
1424 src1 = tcg_temp_new();
1425 src2 = tcg_temp_new();
1426 reg = DREG(insn, 0);
1427 tcg_gen_shli_i32(src1, reg, 16);
1428 tcg_gen_shri_i32(src2, reg, 16);
1429 tcg_gen_or_i32(reg, src1, src2);
1430 gen_logic_cc(s, reg);
1431 }
1432
1433 DISAS_INSN(pea)
1434 {
1435 TCGv tmp;
1436
1437 tmp = gen_lea(env, s, insn, OS_LONG);
1438 if (IS_NULL_QREG(tmp)) {
1439 gen_addr_fault(s);
1440 return;
1441 }
1442 gen_push(s, tmp);
1443 }
1444
1445 DISAS_INSN(ext)
1446 {
1447 int op;
1448 TCGv reg;
1449 TCGv tmp;
1450
1451 reg = DREG(insn, 0);
1452 op = (insn >> 6) & 7;
1453 tmp = tcg_temp_new();
1454 if (op == 3)
1455 tcg_gen_ext16s_i32(tmp, reg);
1456 else
1457 tcg_gen_ext8s_i32(tmp, reg);
1458 if (op == 2)
1459 gen_partset_reg(OS_WORD, reg, tmp);
1460 else
1461 tcg_gen_mov_i32(reg, tmp);
1462 gen_logic_cc(s, tmp);
1463 }
1464
1465 DISAS_INSN(tst)
1466 {
1467 int opsize;
1468 TCGv tmp;
1469
1470 switch ((insn >> 6) & 3) {
1471 case 0: /* tst.b */
1472 opsize = OS_BYTE;
1473 break;
1474 case 1: /* tst.w */
1475 opsize = OS_WORD;
1476 break;
1477 case 2: /* tst.l */
1478 opsize = OS_LONG;
1479 break;
1480 default:
1481 abort();
1482 }
1483 SRC_EA(env, tmp, opsize, 1, NULL);
1484 gen_logic_cc(s, tmp);
1485 }
1486
1487 DISAS_INSN(pulse)
1488 {
1489 /* Implemented as a NOP. */
1490 }
1491
1492 DISAS_INSN(illegal)
1493 {
1494 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
1495 }
1496
1497 /* ??? This should be atomic. */
1498 DISAS_INSN(tas)
1499 {
1500 TCGv dest;
1501 TCGv src1;
1502 TCGv addr;
1503
1504 dest = tcg_temp_new();
1505 SRC_EA(env, src1, OS_BYTE, 1, &addr);
1506 gen_logic_cc(s, src1);
1507 tcg_gen_ori_i32(dest, src1, 0x80);
1508 DEST_EA(env, insn, OS_BYTE, dest, &addr);
1509 }
1510
1511 DISAS_INSN(mull)
1512 {
1513 uint16_t ext;
1514 TCGv reg;
1515 TCGv src1;
1516 TCGv dest;
1517
1518 /* The upper 32 bits of the product are discarded, so
1519 muls.l and mulu.l are functionally equivalent. */
1520 ext = cpu_lduw_code(env, s->pc);
1521 s->pc += 2;
1522 if (ext & 0x87ff) {
1523 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
1524 return;
1525 }
1526 reg = DREG(ext, 12);
1527 SRC_EA(env, src1, OS_LONG, 0, NULL);
1528 dest = tcg_temp_new();
1529 tcg_gen_mul_i32(dest, src1, reg);
1530 tcg_gen_mov_i32(reg, dest);
1531 /* Unlike m68k, coldfire always clears the overflow bit. */
1532 gen_logic_cc(s, dest);
1533 }
1534
1535 DISAS_INSN(link)
1536 {
1537 int16_t offset;
1538 TCGv reg;
1539 TCGv tmp;
1540
1541 offset = cpu_ldsw_code(env, s->pc);
1542 s->pc += 2;
1543 reg = AREG(insn, 0);
1544 tmp = tcg_temp_new();
1545 tcg_gen_subi_i32(tmp, QREG_SP, 4);
1546 gen_store(s, OS_LONG, tmp, reg);
1547 if ((insn & 7) != 7)
1548 tcg_gen_mov_i32(reg, tmp);
1549 tcg_gen_addi_i32(QREG_SP, tmp, offset);
1550 }
1551
1552 DISAS_INSN(unlk)
1553 {
1554 TCGv src;
1555 TCGv reg;
1556 TCGv tmp;
1557
1558 src = tcg_temp_new();
1559 reg = AREG(insn, 0);
1560 tcg_gen_mov_i32(src, reg);
1561 tmp = gen_load(s, OS_LONG, src, 0);
1562 tcg_gen_mov_i32(reg, tmp);
1563 tcg_gen_addi_i32(QREG_SP, src, 4);
1564 }
1565
1566 DISAS_INSN(nop)
1567 {
1568 }
1569
1570 DISAS_INSN(rts)
1571 {
1572 TCGv tmp;
1573
1574 tmp = gen_load(s, OS_LONG, QREG_SP, 0);
1575 tcg_gen_addi_i32(QREG_SP, QREG_SP, 4);
1576 gen_jmp(s, tmp);
1577 }
1578
1579 DISAS_INSN(jump)
1580 {
1581 TCGv tmp;
1582
1583 /* Load the target address first to ensure correct exception
1584 behavior. */
1585 tmp = gen_lea(env, s, insn, OS_LONG);
1586 if (IS_NULL_QREG(tmp)) {
1587 gen_addr_fault(s);
1588 return;
1589 }
1590 if ((insn & 0x40) == 0) {
1591 /* jsr */
1592 gen_push(s, tcg_const_i32(s->pc));
1593 }
1594 gen_jmp(s, tmp);
1595 }
1596
1597 DISAS_INSN(addsubq)
1598 {
1599 TCGv src1;
1600 TCGv src2;
1601 TCGv dest;
1602 int val;
1603 TCGv addr;
1604
1605 SRC_EA(env, src1, OS_LONG, 0, &addr);
1606 val = (insn >> 9) & 7;
1607 if (val == 0)
1608 val = 8;
1609 dest = tcg_temp_new();
1610 tcg_gen_mov_i32(dest, src1);
1611 if ((insn & 0x38) == 0x08) {
1612 /* Don't update condition codes if the destination is an
1613 address register. */
1614 if (insn & 0x0100) {
1615 tcg_gen_subi_i32(dest, dest, val);
1616 } else {
1617 tcg_gen_addi_i32(dest, dest, val);
1618 }
1619 } else {
1620 src2 = tcg_const_i32(val);
1621 if (insn & 0x0100) {
1622 gen_helper_xflag_lt(QREG_CC_X, dest, src2);
1623 tcg_gen_subi_i32(dest, dest, val);
1624 s->cc_op = CC_OP_SUB;
1625 } else {
1626 tcg_gen_addi_i32(dest, dest, val);
1627 gen_helper_xflag_lt(QREG_CC_X, dest, src2);
1628 s->cc_op = CC_OP_ADD;
1629 }
1630 gen_update_cc_add(dest, src2);
1631 }
1632 DEST_EA(env, insn, OS_LONG, dest, &addr);
1633 }
1634
1635 DISAS_INSN(tpf)
1636 {
1637 switch (insn & 7) {
1638 case 2: /* One extension word. */
1639 s->pc += 2;
1640 break;
1641 case 3: /* Two extension words. */
1642 s->pc += 4;
1643 break;
1644 case 4: /* No extension words. */
1645 break;
1646 default:
1647 disas_undef(env, s, insn);
1648 }
1649 }
1650
1651 DISAS_INSN(branch)
1652 {
1653 int32_t offset;
1654 uint32_t base;
1655 int op;
1656 int l1;
1657
1658 base = s->pc;
1659 op = (insn >> 8) & 0xf;
1660 offset = (int8_t)insn;
1661 if (offset == 0) {
1662 offset = cpu_ldsw_code(env, s->pc);
1663 s->pc += 2;
1664 } else if (offset == -1) {
1665 offset = read_im32(env, s);
1666 }
1667 if (op == 1) {
1668 /* bsr */
1669 gen_push(s, tcg_const_i32(s->pc));
1670 }
1671 gen_flush_cc_op(s);
1672 if (op > 1) {
1673 /* Bcc */
1674 l1 = gen_new_label();
1675 gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
1676 gen_jmp_tb(s, 1, base + offset);
1677 gen_set_label(l1);
1678 gen_jmp_tb(s, 0, s->pc);
1679 } else {
1680 /* Unconditional branch. */
1681 gen_jmp_tb(s, 0, base + offset);
1682 }
1683 }
1684
1685 DISAS_INSN(moveq)
1686 {
1687 uint32_t val;
1688
1689 val = (int8_t)insn;
1690 tcg_gen_movi_i32(DREG(insn, 9), val);
1691 gen_logic_cc(s, tcg_const_i32(val));
1692 }
1693
1694 DISAS_INSN(mvzs)
1695 {
1696 int opsize;
1697 TCGv src;
1698 TCGv reg;
1699
1700 if (insn & 0x40)
1701 opsize = OS_WORD;
1702 else
1703 opsize = OS_BYTE;
1704 SRC_EA(env, src, opsize, (insn & 0x80) == 0, NULL);
1705 reg = DREG(insn, 9);
1706 tcg_gen_mov_i32(reg, src);
1707 gen_logic_cc(s, src);
1708 }
1709
1710 DISAS_INSN(or)
1711 {
1712 TCGv reg;
1713 TCGv dest;
1714 TCGv src;
1715 TCGv addr;
1716
1717 reg = DREG(insn, 9);
1718 dest = tcg_temp_new();
1719 if (insn & 0x100) {
1720 SRC_EA(env, src, OS_LONG, 0, &addr);
1721 tcg_gen_or_i32(dest, src, reg);
1722 DEST_EA(env, insn, OS_LONG, dest, &addr);
1723 } else {
1724 SRC_EA(env, src, OS_LONG, 0, NULL);
1725 tcg_gen_or_i32(dest, src, reg);
1726 tcg_gen_mov_i32(reg, dest);
1727 }
1728 gen_logic_cc(s, dest);
1729 }
1730
1731 DISAS_INSN(suba)
1732 {
1733 TCGv src;
1734 TCGv reg;
1735
1736 SRC_EA(env, src, OS_LONG, 0, NULL);
1737 reg = AREG(insn, 9);
1738 tcg_gen_sub_i32(reg, reg, src);
1739 }
1740
1741 DISAS_INSN(subx)
1742 {
1743 TCGv reg;
1744 TCGv src;
1745
1746 gen_flush_flags(s);
1747 reg = DREG(insn, 9);
1748 src = DREG(insn, 0);
1749 gen_helper_subx_cc(reg, cpu_env, reg, src);
1750 }
1751
1752 DISAS_INSN(mov3q)
1753 {
1754 TCGv src;
1755 int val;
1756
1757 val = (insn >> 9) & 7;
1758 if (val == 0)
1759 val = -1;
1760 src = tcg_const_i32(val);
1761 gen_logic_cc(s, src);
1762 DEST_EA(env, insn, OS_LONG, src, NULL);
1763 }
1764
1765 DISAS_INSN(cmp)
1766 {
1767 int op;
1768 TCGv src;
1769 TCGv reg;
1770 TCGv dest;
1771 int opsize;
1772
1773 op = (insn >> 6) & 3;
1774 switch (op) {
1775 case 0: /* cmp.b */
1776 opsize = OS_BYTE;
1777 s->cc_op = CC_OP_CMPB;
1778 break;
1779 case 1: /* cmp.w */
1780 opsize = OS_WORD;
1781 s->cc_op = CC_OP_CMPW;
1782 break;
1783 case 2: /* cmp.l */
1784 opsize = OS_LONG;
1785 s->cc_op = CC_OP_SUB;
1786 break;
1787 default:
1788 abort();
1789 }
1790 SRC_EA(env, src, opsize, 1, NULL);
1791 reg = DREG(insn, 9);
1792 dest = tcg_temp_new();
1793 tcg_gen_sub_i32(dest, reg, src);
1794 gen_update_cc_add(dest, src);
1795 }
1796
1797 DISAS_INSN(cmpa)
1798 {
1799 int opsize;
1800 TCGv src;
1801 TCGv reg;
1802 TCGv dest;
1803
1804 if (insn & 0x100) {
1805 opsize = OS_LONG;
1806 } else {
1807 opsize = OS_WORD;
1808 }
1809 SRC_EA(env, src, opsize, 1, NULL);
1810 reg = AREG(insn, 9);
1811 dest = tcg_temp_new();
1812 tcg_gen_sub_i32(dest, reg, src);
1813 gen_update_cc_add(dest, src);
1814 s->cc_op = CC_OP_SUB;
1815 }
1816
1817 DISAS_INSN(eor)
1818 {
1819 TCGv src;
1820 TCGv reg;
1821 TCGv dest;
1822 TCGv addr;
1823
1824 SRC_EA(env, src, OS_LONG, 0, &addr);
1825 reg = DREG(insn, 9);
1826 dest = tcg_temp_new();
1827 tcg_gen_xor_i32(dest, src, reg);
1828 gen_logic_cc(s, dest);
1829 DEST_EA(env, insn, OS_LONG, dest, &addr);
1830 }
1831
1832 DISAS_INSN(and)
1833 {
1834 TCGv src;
1835 TCGv reg;
1836 TCGv dest;
1837 TCGv addr;
1838
1839 reg = DREG(insn, 9);
1840 dest = tcg_temp_new();
1841 if (insn & 0x100) {
1842 SRC_EA(env, src, OS_LONG, 0, &addr);
1843 tcg_gen_and_i32(dest, src, reg);
1844 DEST_EA(env, insn, OS_LONG, dest, &addr);
1845 } else {
1846 SRC_EA(env, src, OS_LONG, 0, NULL);
1847 tcg_gen_and_i32(dest, src, reg);
1848 tcg_gen_mov_i32(reg, dest);
1849 }
1850 gen_logic_cc(s, dest);
1851 }
1852
1853 DISAS_INSN(adda)
1854 {
1855 TCGv src;
1856 TCGv reg;
1857
1858 SRC_EA(env, src, OS_LONG, 0, NULL);
1859 reg = AREG(insn, 9);
1860 tcg_gen_add_i32(reg, reg, src);
1861 }
1862
1863 DISAS_INSN(addx)
1864 {
1865 TCGv reg;
1866 TCGv src;
1867
1868 gen_flush_flags(s);
1869 reg = DREG(insn, 9);
1870 src = DREG(insn, 0);
1871 gen_helper_addx_cc(reg, cpu_env, reg, src);
1872 s->cc_op = CC_OP_FLAGS;
1873 }
1874
1875 /* TODO: This could be implemented without helper functions. */
1876 DISAS_INSN(shift_im)
1877 {
1878 TCGv reg;
1879 int tmp;
1880 TCGv shift;
1881
1882 reg = DREG(insn, 0);
1883 tmp = (insn >> 9) & 7;
1884 if (tmp == 0)
1885 tmp = 8;
1886 shift = tcg_const_i32(tmp);
1887 /* No need to flush flags becuse we know we will set C flag. */
1888 if (insn & 0x100) {
1889 gen_helper_shl_cc(reg, cpu_env, reg, shift);
1890 } else {
1891 if (insn & 8) {
1892 gen_helper_shr_cc(reg, cpu_env, reg, shift);
1893 } else {
1894 gen_helper_sar_cc(reg, cpu_env, reg, shift);
1895 }
1896 }
1897 s->cc_op = CC_OP_SHIFT;
1898 }
1899
1900 DISAS_INSN(shift_reg)
1901 {
1902 TCGv reg;
1903 TCGv shift;
1904
1905 reg = DREG(insn, 0);
1906 shift = DREG(insn, 9);
1907 /* Shift by zero leaves C flag unmodified. */
1908 gen_flush_flags(s);
1909 if (insn & 0x100) {
1910 gen_helper_shl_cc(reg, cpu_env, reg, shift);
1911 } else {
1912 if (insn & 8) {
1913 gen_helper_shr_cc(reg, cpu_env, reg, shift);
1914 } else {
1915 gen_helper_sar_cc(reg, cpu_env, reg, shift);
1916 }
1917 }
1918 s->cc_op = CC_OP_SHIFT;
1919 }
1920
1921 DISAS_INSN(ff1)
1922 {
1923 TCGv reg;
1924 reg = DREG(insn, 0);
1925 gen_logic_cc(s, reg);
1926 gen_helper_ff1(reg, reg);
1927 }
1928
1929 static TCGv gen_get_sr(DisasContext *s)
1930 {
1931 TCGv ccr;
1932 TCGv sr;
1933
1934 ccr = gen_get_ccr(s);
1935 sr = tcg_temp_new();
1936 tcg_gen_andi_i32(sr, QREG_SR, 0xffe0);
1937 tcg_gen_or_i32(sr, sr, ccr);
1938 return sr;
1939 }
1940
1941 DISAS_INSN(strldsr)
1942 {
1943 uint16_t ext;
1944 uint32_t addr;
1945
1946 addr = s->pc - 2;
1947 ext = cpu_lduw_code(env, s->pc);
1948 s->pc += 2;
1949 if (ext != 0x46FC) {
1950 gen_exception(s, addr, EXCP_UNSUPPORTED);
1951 return;
1952 }
1953 ext = cpu_lduw_code(env, s->pc);
1954 s->pc += 2;
1955 if (IS_USER(s) || (ext & SR_S) == 0) {
1956 gen_exception(s, addr, EXCP_PRIVILEGE);
1957 return;
1958 }
1959 gen_push(s, gen_get_sr(s));
1960 gen_set_sr_im(s, ext, 0);
1961 }
1962
1963 DISAS_INSN(move_from_sr)
1964 {
1965 TCGv reg;
1966 TCGv sr;
1967
1968 if (IS_USER(s)) {
1969 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1970 return;
1971 }
1972 sr = gen_get_sr(s);
1973 reg = DREG(insn, 0);
1974 gen_partset_reg(OS_WORD, reg, sr);
1975 }
1976
1977 DISAS_INSN(move_to_sr)
1978 {
1979 if (IS_USER(s)) {
1980 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1981 return;
1982 }
1983 gen_set_sr(env, s, insn, 0);
1984 gen_lookup_tb(s);
1985 }
1986
1987 DISAS_INSN(move_from_usp)
1988 {
1989 if (IS_USER(s)) {
1990 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1991 return;
1992 }
1993 /* TODO: Implement USP. */
1994 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
1995 }
1996
1997 DISAS_INSN(move_to_usp)
1998 {
1999 if (IS_USER(s)) {
2000 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2001 return;
2002 }
2003 /* TODO: Implement USP. */
2004 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
2005 }
2006
2007 DISAS_INSN(halt)
2008 {
2009 gen_exception(s, s->pc, EXCP_HALT_INSN);
2010 }
2011
2012 DISAS_INSN(stop)
2013 {
2014 uint16_t ext;
2015
2016 if (IS_USER(s)) {
2017 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2018 return;
2019 }
2020
2021 ext = cpu_lduw_code(env, s->pc);
2022 s->pc += 2;
2023
2024 gen_set_sr_im(s, ext, 0);
2025 tcg_gen_movi_i32(cpu_halted, 1);
2026 gen_exception(s, s->pc, EXCP_HLT);
2027 }
2028
2029 DISAS_INSN(rte)
2030 {
2031 if (IS_USER(s)) {
2032 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2033 return;
2034 }
2035 gen_exception(s, s->pc - 2, EXCP_RTE);
2036 }
2037
2038 DISAS_INSN(movec)
2039 {
2040 uint16_t ext;
2041 TCGv reg;
2042
2043 if (IS_USER(s)) {
2044 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2045 return;
2046 }
2047
2048 ext = cpu_lduw_code(env, s->pc);
2049 s->pc += 2;
2050
2051 if (ext & 0x8000) {
2052 reg = AREG(ext, 12);
2053 } else {
2054 reg = DREG(ext, 12);
2055 }
2056 gen_helper_movec(cpu_env, tcg_const_i32(ext & 0xfff), reg);
2057 gen_lookup_tb(s);
2058 }
2059
2060 DISAS_INSN(intouch)
2061 {
2062 if (IS_USER(s)) {
2063 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2064 return;
2065 }
2066 /* ICache fetch. Implement as no-op. */
2067 }
2068
2069 DISAS_INSN(cpushl)
2070 {
2071 if (IS_USER(s)) {
2072 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2073 return;
2074 }
2075 /* Cache push/invalidate. Implement as no-op. */
2076 }
2077
2078 DISAS_INSN(wddata)
2079 {
2080 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2081 }
2082
2083 DISAS_INSN(wdebug)
2084 {
2085 if (IS_USER(s)) {
2086 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2087 return;
2088 }
2089 /* TODO: Implement wdebug. */
2090 cpu_abort(env, "WDEBUG not implemented");
2091 }
2092
2093 DISAS_INSN(trap)
2094 {
2095 gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));
2096 }
2097
2098 /* ??? FP exceptions are not implemented. Most exceptions are deferred until
2099 immediately before the next FP instruction is executed. */
2100 DISAS_INSN(fpu)
2101 {
2102 uint16_t ext;
2103 int32_t offset;
2104 int opmode;
2105 TCGv_i64 src;
2106 TCGv_i64 dest;
2107 TCGv_i64 res;
2108 TCGv tmp32;
2109 int round;
2110 int set_dest;
2111 int opsize;
2112
2113 ext = cpu_lduw_code(env, s->pc);
2114 s->pc += 2;
2115 opmode = ext & 0x7f;
2116 switch ((ext >> 13) & 7) {
2117 case 0: case 2:
2118 break;
2119 case 1:
2120 goto undef;
2121 case 3: /* fmove out */
2122 src = FREG(ext, 7);
2123 tmp32 = tcg_temp_new_i32();
2124 /* fmove */
2125 /* ??? TODO: Proper behavior on overflow. */
2126 switch ((ext >> 10) & 7) {
2127 case 0:
2128 opsize = OS_LONG;
2129 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2130 break;
2131 case 1:
2132 opsize = OS_SINGLE;
2133 gen_helper_f64_to_f32(tmp32, cpu_env, src);
2134 break;
2135 case 4:
2136 opsize = OS_WORD;
2137 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2138 break;
2139 case 5: /* OS_DOUBLE */
2140 tcg_gen_mov_i32(tmp32, AREG(insn, 0));
2141 switch ((insn >> 3) & 7) {
2142 case 2:
2143 case 3:
2144 break;
2145 case 4:
2146 tcg_gen_addi_i32(tmp32, tmp32, -8);
2147 break;
2148 case 5:
2149 offset = cpu_ldsw_code(env, s->pc);
2150 s->pc += 2;
2151 tcg_gen_addi_i32(tmp32, tmp32, offset);
2152 break;
2153 default:
2154 goto undef;
2155 }
2156 gen_store64(s, tmp32, src);
2157 switch ((insn >> 3) & 7) {
2158 case 3:
2159 tcg_gen_addi_i32(tmp32, tmp32, 8);
2160 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2161 break;
2162 case 4:
2163 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2164 break;
2165 }
2166 tcg_temp_free_i32(tmp32);
2167 return;
2168 case 6:
2169 opsize = OS_BYTE;
2170 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2171 break;
2172 default:
2173 goto undef;
2174 }
2175 DEST_EA(env, insn, opsize, tmp32, NULL);
2176 tcg_temp_free_i32(tmp32);
2177 return;
2178 case 4: /* fmove to control register. */
2179 switch ((ext >> 10) & 7) {
2180 case 4: /* FPCR */
2181 /* Not implemented. Ignore writes. */
2182 break;
2183 case 1: /* FPIAR */
2184 case 2: /* FPSR */
2185 default:
2186 cpu_abort(NULL, "Unimplemented: fmove to control %d",
2187 (ext >> 10) & 7);
2188 }
2189 break;
2190 case 5: /* fmove from control register. */
2191 switch ((ext >> 10) & 7) {
2192 case 4: /* FPCR */
2193 /* Not implemented. Always return zero. */
2194 tmp32 = tcg_const_i32(0);
2195 break;
2196 case 1: /* FPIAR */
2197 case 2: /* FPSR */
2198 default:
2199 cpu_abort(NULL, "Unimplemented: fmove from control %d",
2200 (ext >> 10) & 7);
2201 goto undef;
2202 }
2203 DEST_EA(env, insn, OS_LONG, tmp32, NULL);
2204 break;
2205 case 6: /* fmovem */
2206 case 7:
2207 {
2208 TCGv addr;
2209 uint16_t mask;
2210 int i;
2211 if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0)
2212 goto undef;
2213 tmp32 = gen_lea(env, s, insn, OS_LONG);
2214 if (IS_NULL_QREG(tmp32)) {
2215 gen_addr_fault(s);
2216 return;
2217 }
2218 addr = tcg_temp_new_i32();
2219 tcg_gen_mov_i32(addr, tmp32);
2220 mask = 0x80;
2221 for (i = 0; i < 8; i++) {
2222 if (ext & mask) {
2223 s->is_mem = 1;
2224 dest = FREG(i, 0);
2225 if (ext & (1 << 13)) {
2226 /* store */
2227 tcg_gen_qemu_stf64(dest, addr, IS_USER(s));
2228 } else {
2229 /* load */
2230 tcg_gen_qemu_ldf64(dest, addr, IS_USER(s));
2231 }
2232 if (ext & (mask - 1))
2233 tcg_gen_addi_i32(addr, addr, 8);
2234 }
2235 mask >>= 1;
2236 }
2237 tcg_temp_free_i32(addr);
2238 }
2239 return;
2240 }
2241 if (ext & (1 << 14)) {
2242 /* Source effective address. */
2243 switch ((ext >> 10) & 7) {
2244 case 0: opsize = OS_LONG; break;
2245 case 1: opsize = OS_SINGLE; break;
2246 case 4: opsize = OS_WORD; break;
2247 case 5: opsize = OS_DOUBLE; break;
2248 case 6: opsize = OS_BYTE; break;
2249 default:
2250 goto undef;
2251 }
2252 if (opsize == OS_DOUBLE) {
2253 tmp32 = tcg_temp_new_i32();
2254 tcg_gen_mov_i32(tmp32, AREG(insn, 0));
2255 switch ((insn >> 3) & 7) {
2256 case 2:
2257 case 3:
2258 break;
2259 case 4:
2260 tcg_gen_addi_i32(tmp32, tmp32, -8);
2261 break;
2262 case 5:
2263 offset = cpu_ldsw_code(env, s->pc);
2264 s->pc += 2;
2265 tcg_gen_addi_i32(tmp32, tmp32, offset);
2266 break;
2267 case 7:
2268 offset = cpu_ldsw_code(env, s->pc);
2269 offset += s->pc - 2;
2270 s->pc += 2;
2271 tcg_gen_addi_i32(tmp32, tmp32, offset);
2272 break;
2273 default:
2274 goto undef;
2275 }
2276 src = gen_load64(s, tmp32);
2277 switch ((insn >> 3) & 7) {
2278 case 3:
2279 tcg_gen_addi_i32(tmp32, tmp32, 8);
2280 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2281 break;
2282 case 4:
2283 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2284 break;
2285 }
2286 tcg_temp_free_i32(tmp32);
2287 } else {
2288 SRC_EA(env, tmp32, opsize, 1, NULL);
2289 src = tcg_temp_new_i64();
2290 switch (opsize) {
2291 case OS_LONG:
2292 case OS_WORD:
2293 case OS_BYTE:
2294 gen_helper_i32_to_f64(src, cpu_env, tmp32);
2295 break;
2296 case OS_SINGLE:
2297 gen_helper_f32_to_f64(src, cpu_env, tmp32);
2298 break;
2299 }
2300 }
2301 } else {
2302 /* Source register. */
2303 src = FREG(ext, 10);
2304 }
2305 dest = FREG(ext, 7);
2306 res = tcg_temp_new_i64();
2307 if (opmode != 0x3a)
2308 tcg_gen_mov_f64(res, dest);
2309 round = 1;
2310 set_dest = 1;
2311 switch (opmode) {
2312 case 0: case 0x40: case 0x44: /* fmove */
2313 tcg_gen_mov_f64(res, src);
2314 break;
2315 case 1: /* fint */
2316 gen_helper_iround_f64(res, cpu_env, src);
2317 round = 0;
2318 break;
2319 case 3: /* fintrz */
2320 gen_helper_itrunc_f64(res, cpu_env, src);
2321 round = 0;
2322 break;
2323 case 4: case 0x41: case 0x45: /* fsqrt */
2324 gen_helper_sqrt_f64(res, cpu_env, src);
2325 break;
2326 case 0x18: case 0x58: case 0x5c: /* fabs */
2327 gen_helper_abs_f64(res, src);
2328 break;
2329 case 0x1a: case 0x5a: case 0x5e: /* fneg */
2330 gen_helper_chs_f64(res, src);
2331 break;
2332 case 0x20: case 0x60: case 0x64: /* fdiv */
2333 gen_helper_div_f64(res, cpu_env, res, src);
2334 break;
2335 case 0x22: case 0x62: case 0x66: /* fadd */
2336 gen_helper_add_f64(res, cpu_env, res, src);
2337 break;
2338 case 0x23: case 0x63: case 0x67: /* fmul */
2339 gen_helper_mul_f64(res, cpu_env, res, src);
2340 break;
2341 case 0x28: case 0x68: case 0x6c: /* fsub */
2342 gen_helper_sub_f64(res, cpu_env, res, src);
2343 break;
2344 case 0x38: /* fcmp */
2345 gen_helper_sub_cmp_f64(res, cpu_env, res, src);
2346 set_dest = 0;
2347 round = 0;
2348 break;
2349 case 0x3a: /* ftst */
2350 tcg_gen_mov_f64(res, src);
2351 set_dest = 0;
2352 round = 0;
2353 break;
2354 default:
2355 goto undef;
2356 }
2357 if (ext & (1 << 14)) {
2358 tcg_temp_free_i64(src);
2359 }
2360 if (round) {
2361 if (opmode & 0x40) {
2362 if ((opmode & 0x4) != 0)
2363 round = 0;
2364 } else if ((s->fpcr & M68K_FPCR_PREC) == 0) {
2365 round = 0;
2366 }
2367 }
2368 if (round) {
2369 TCGv tmp = tcg_temp_new_i32();
2370 gen_helper_f64_to_f32(tmp, cpu_env, res);
2371 gen_helper_f32_to_f64(res, cpu_env, tmp);
2372 tcg_temp_free_i32(tmp);
2373 }
2374 tcg_gen_mov_f64(QREG_FP_RESULT, res);
2375 if (set_dest) {
2376 tcg_gen_mov_f64(dest, res);
2377 }
2378 tcg_temp_free_i64(res);
2379 return;
2380 undef:
2381 /* FIXME: Is this right for offset addressing modes? */
2382 s->pc -= 2;
2383 disas_undef_fpu(env, s, insn);
2384 }
2385
2386 DISAS_INSN(fbcc)
2387 {
2388 uint32_t offset;
2389 uint32_t addr;
2390 TCGv flag;
2391 int l1;
2392
2393 addr = s->pc;
2394 offset = cpu_ldsw_code(env, s->pc);
2395 s->pc += 2;
2396 if (insn & (1 << 6)) {
2397 offset = (offset << 16) | cpu_lduw_code(env, s->pc);
2398 s->pc += 2;
2399 }
2400
2401 l1 = gen_new_label();
2402 /* TODO: Raise BSUN exception. */
2403 flag = tcg_temp_new();
2404 gen_helper_compare_f64(flag, cpu_env, QREG_FP_RESULT);
2405 /* Jump to l1 if condition is true. */
2406 switch (insn & 0xf) {
2407 case 0: /* f */
2408 break;
2409 case 1: /* eq (=0) */
2410 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
2411 break;
2412 case 2: /* ogt (=1) */
2413 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(1), l1);
2414 break;
2415 case 3: /* oge (=0 or =1) */
2416 tcg_gen_brcond_i32(TCG_COND_LEU, flag, tcg_const_i32(1), l1);
2417 break;
2418 case 4: /* olt (=-1) */
2419 tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(0), l1);
2420 break;
2421 case 5: /* ole (=-1 or =0) */
2422 tcg_gen_brcond_i32(TCG_COND_LE, flag, tcg_const_i32(0), l1);
2423 break;
2424 case 6: /* ogl (=-1 or =1) */
2425 tcg_gen_andi_i32(flag, flag, 1);
2426 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
2427 break;
2428 case 7: /* or (=2) */
2429 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(2), l1);
2430 break;
2431 case 8: /* un (<2) */
2432 tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(2), l1);
2433 break;
2434 case 9: /* ueq (=0 or =2) */
2435 tcg_gen_andi_i32(flag, flag, 1);
2436 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
2437 break;
2438 case 10: /* ugt (>0) */
2439 tcg_gen_brcond_i32(TCG_COND_GT, flag, tcg_const_i32(0), l1);
2440 break;
2441 case 11: /* uge (>=0) */
2442 tcg_gen_brcond_i32(TCG_COND_GE, flag, tcg_const_i32(0), l1);
2443 break;
2444 case 12: /* ult (=-1 or =2) */
2445 tcg_gen_brcond_i32(TCG_COND_GEU, flag, tcg_const_i32(2), l1);
2446 break;
2447 case 13: /* ule (!=1) */
2448 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(1), l1);
2449 break;
2450 case 14: /* ne (!=0) */
2451 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
2452 break;
2453 case 15: /* t */
2454 tcg_gen_br(l1);
2455 break;
2456 }
2457 gen_jmp_tb(s, 0, s->pc);
2458 gen_set_label(l1);
2459 gen_jmp_tb(s, 1, addr + offset);
2460 }
2461
2462 DISAS_INSN(frestore)
2463 {
2464 /* TODO: Implement frestore. */
2465 cpu_abort(env, "FRESTORE not implemented");
2466 }
2467
2468 DISAS_INSN(fsave)
2469 {
2470 /* TODO: Implement fsave. */
2471 cpu_abort(env, "FSAVE not implemented");
2472 }
2473
2474 static inline TCGv gen_mac_extract_word(DisasContext *s, TCGv val, int upper)
2475 {
2476 TCGv tmp = tcg_temp_new();
2477 if (s->env->macsr & MACSR_FI) {
2478 if (upper)
2479 tcg_gen_andi_i32(tmp, val, 0xffff0000);
2480 else
2481 tcg_gen_shli_i32(tmp, val, 16);
2482 } else if (s->env->macsr & MACSR_SU) {
2483 if (upper)
2484 tcg_gen_sari_i32(tmp, val, 16);
2485 else
2486 tcg_gen_ext16s_i32(tmp, val);
2487 } else {
2488 if (upper)
2489 tcg_gen_shri_i32(tmp, val, 16);
2490 else
2491 tcg_gen_ext16u_i32(tmp, val);
2492 }
2493 return tmp;
2494 }
2495
2496 static void gen_mac_clear_flags(void)
2497 {
2498 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR,
2499 ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV));
2500 }
2501
2502 DISAS_INSN(mac)
2503 {
2504 TCGv rx;
2505 TCGv ry;
2506 uint16_t ext;
2507 int acc;
2508 TCGv tmp;
2509 TCGv addr;
2510 TCGv loadval;
2511 int dual;
2512 TCGv saved_flags;
2513
2514 if (!s->done_mac) {
2515 s->mactmp = tcg_temp_new_i64();
2516 s->done_mac = 1;
2517 }
2518
2519 ext = cpu_lduw_code(env, s->pc);
2520 s->pc += 2;
2521
2522 acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
2523 dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
2524 if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) {
2525 disas_undef(env, s, insn);
2526 return;
2527 }
2528 if (insn & 0x30) {
2529 /* MAC with load. */
2530 tmp = gen_lea(env, s, insn, OS_LONG);
2531 addr = tcg_temp_new();
2532 tcg_gen_and_i32(addr, tmp, QREG_MAC_MASK);
2533 /* Load the value now to ensure correct exception behavior.
2534 Perform writeback after reading the MAC inputs. */
2535 loadval = gen_load(s, OS_LONG, addr, 0);
2536
2537 acc ^= 1;
2538 rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
2539 ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
2540 } else {
2541 loadval = addr = NULL_QREG;
2542 rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2543 ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2544 }
2545
2546 gen_mac_clear_flags();
2547 #if 0
2548 l1 = -1;
2549 /* Disabled because conditional branches clobber temporary vars. */
2550 if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
2551 /* Skip the multiply if we know we will ignore it. */
2552 l1 = gen_new_label();
2553 tmp = tcg_temp_new();
2554 tcg_gen_andi_i32(tmp, QREG_MACSR, 1 << (acc + 8));
2555 gen_op_jmp_nz32(tmp, l1);
2556 }
2557 #endif
2558
2559 if ((ext & 0x0800) == 0) {
2560 /* Word. */
2561 rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
2562 ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
2563 }
2564 if (s->env->macsr & MACSR_FI) {
2565 gen_helper_macmulf(s->mactmp, cpu_env, rx, ry);
2566 } else {
2567 if (s->env->macsr & MACSR_SU)
2568 gen_helper_macmuls(s->mactmp, cpu_env, rx, ry);
2569 else
2570 gen_helper_macmulu(s->mactmp, cpu_env, rx, ry);
2571 switch ((ext >> 9) & 3) {
2572 case 1:
2573 tcg_gen_shli_i64(s->mactmp, s->mactmp, 1);
2574 break;
2575 case 3:
2576 tcg_gen_shri_i64(s->mactmp, s->mactmp, 1);
2577 break;
2578 }
2579 }
2580
2581 if (dual) {
2582 /* Save the overflow flag from the multiply. */
2583 saved_flags = tcg_temp_new();
2584 tcg_gen_mov_i32(saved_flags, QREG_MACSR);
2585 } else {
2586 saved_flags = NULL_QREG;
2587 }
2588
2589 #if 0
2590 /* Disabled because conditional branches clobber temporary vars. */
2591 if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
2592 /* Skip the accumulate if the value is already saturated. */
2593 l1 = gen_new_label();
2594 tmp = tcg_temp_new();
2595 gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
2596 gen_op_jmp_nz32(tmp, l1);
2597 }
2598 #endif
2599
2600 if (insn & 0x100)
2601 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
2602 else
2603 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
2604
2605 if (s->env->macsr & MACSR_FI)
2606 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
2607 else if (s->env->macsr & MACSR_SU)
2608 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
2609 else
2610 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
2611
2612 #if 0
2613 /* Disabled because conditional branches clobber temporary vars. */
2614 if (l1 != -1)
2615 gen_set_label(l1);
2616 #endif
2617
2618 if (dual) {
2619 /* Dual accumulate variant. */
2620 acc = (ext >> 2) & 3;
2621 /* Restore the overflow flag from the multiplier. */
2622 tcg_gen_mov_i32(QREG_MACSR, saved_flags);
2623 #if 0
2624 /* Disabled because conditional branches clobber temporary vars. */
2625 if ((s->env->macsr & MACSR_OMC) != 0) {
2626 /* Skip the accumulate if the value is already saturated. */
2627 l1 = gen_new_label();
2628 tmp = tcg_temp_new();
2629 gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
2630 gen_op_jmp_nz32(tmp, l1);
2631 }
2632 #endif
2633 if (ext & 2)
2634 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
2635 else
2636 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
2637 if (s->env->macsr & MACSR_FI)
2638 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
2639 else if (s->env->macsr & MACSR_SU)
2640 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
2641 else
2642 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
2643 #if 0
2644 /* Disabled because conditional branches clobber temporary vars. */
2645 if (l1 != -1)
2646 gen_set_label(l1);
2647 #endif
2648 }
2649 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(acc));
2650
2651 if (insn & 0x30) {
2652 TCGv rw;
2653 rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2654 tcg_gen_mov_i32(rw, loadval);
2655 /* FIXME: Should address writeback happen with the masked or
2656 unmasked value? */
2657 switch ((insn >> 3) & 7) {
2658 case 3: /* Post-increment. */
2659 tcg_gen_addi_i32(AREG(insn, 0), addr, 4);
2660 break;
2661 case 4: /* Pre-decrement. */
2662 tcg_gen_mov_i32(AREG(insn, 0), addr);
2663 }
2664 }
2665 }
2666
2667 DISAS_INSN(from_mac)
2668 {
2669 TCGv rx;
2670 TCGv_i64 acc;
2671 int accnum;
2672
2673 rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2674 accnum = (insn >> 9) & 3;
2675 acc = MACREG(accnum);
2676 if (s->env->macsr & MACSR_FI) {
2677 gen_helper_get_macf(rx, cpu_env, acc);
2678 } else if ((s->env->macsr & MACSR_OMC) == 0) {
2679 tcg_gen_trunc_i64_i32(rx, acc);
2680 } else if (s->env->macsr & MACSR_SU) {
2681 gen_helper_get_macs(rx, acc);
2682 } else {
2683 gen_helper_get_macu(rx, acc);
2684 }
2685 if (insn & 0x40) {
2686 tcg_gen_movi_i64(acc, 0);
2687 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
2688 }
2689 }
2690
2691 DISAS_INSN(move_mac)
2692 {
2693 /* FIXME: This can be done without a helper. */
2694 int src;
2695 TCGv dest;
2696 src = insn & 3;
2697 dest = tcg_const_i32((insn >> 9) & 3);
2698 gen_helper_mac_move(cpu_env, dest, tcg_const_i32(src));
2699 gen_mac_clear_flags();
2700 gen_helper_mac_set_flags(cpu_env, dest);
2701 }
2702
2703 DISAS_INSN(from_macsr)
2704 {
2705 TCGv reg;
2706
2707 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2708 tcg_gen_mov_i32(reg, QREG_MACSR);
2709 }
2710
2711 DISAS_INSN(from_mask)
2712 {
2713 TCGv reg;
2714 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2715 tcg_gen_mov_i32(reg, QREG_MAC_MASK);
2716 }
2717
2718 DISAS_INSN(from_mext)
2719 {
2720 TCGv reg;
2721 TCGv acc;
2722 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2723 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
2724 if (s->env->macsr & MACSR_FI)
2725 gen_helper_get_mac_extf(reg, cpu_env, acc);
2726 else
2727 gen_helper_get_mac_exti(reg, cpu_env, acc);
2728 }
2729
2730 DISAS_INSN(macsr_to_ccr)
2731 {
2732 tcg_gen_movi_i32(QREG_CC_X, 0);
2733 tcg_gen_andi_i32(QREG_CC_DEST, QREG_MACSR, 0xf);
2734 s->cc_op = CC_OP_FLAGS;
2735 }
2736
2737 DISAS_INSN(to_mac)
2738 {
2739 TCGv_i64 acc;
2740 TCGv val;
2741 int accnum;
2742 accnum = (insn >> 9) & 3;
2743 acc = MACREG(accnum);
2744 SRC_EA(env, val, OS_LONG, 0, NULL);
2745 if (s->env->macsr & MACSR_FI) {
2746 tcg_gen_ext_i32_i64(acc, val);
2747 tcg_gen_shli_i64(acc, acc, 8);
2748 } else if (s->env->macsr & MACSR_SU) {
2749 tcg_gen_ext_i32_i64(acc, val);
2750 } else {
2751 tcg_gen_extu_i32_i64(acc, val);
2752 }
2753 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
2754 gen_mac_clear_flags();
2755 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(accnum));
2756 }
2757
2758 DISAS_INSN(to_macsr)
2759 {
2760 TCGv val;
2761 SRC_EA(env, val, OS_LONG, 0, NULL);
2762 gen_helper_set_macsr(cpu_env, val);
2763 gen_lookup_tb(s);
2764 }
2765
2766 DISAS_INSN(to_mask)
2767 {
2768 TCGv val;
2769 SRC_EA(env, val, OS_LONG, 0, NULL);
2770 tcg_gen_ori_i32(QREG_MAC_MASK, val, 0xffff0000);
2771 }
2772
2773 DISAS_INSN(to_mext)
2774 {
2775 TCGv val;
2776 TCGv acc;
2777 SRC_EA(env, val, OS_LONG, 0, NULL);
2778 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
2779 if (s->env->macsr & MACSR_FI)
2780 gen_helper_set_mac_extf(cpu_env, val, acc);
2781 else if (s->env->macsr & MACSR_SU)
2782 gen_helper_set_mac_exts(cpu_env, val, acc);
2783 else
2784 gen_helper_set_mac_extu(cpu_env, val, acc);
2785 }
2786
2787 static disas_proc opcode_table[65536];
2788
2789 static void
2790 register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
2791 {
2792 int i;
2793 int from;
2794 int to;
2795
2796 /* Sanity check. All set bits must be included in the mask. */
2797 if (opcode & ~mask) {
2798 fprintf(stderr,
2799 "qemu internal error: bogus opcode definition %04x/%04x\n",
2800 opcode, mask);
2801 abort();
2802 }
2803 /* This could probably be cleverer. For now just optimize the case where
2804 the top bits are known. */
2805 /* Find the first zero bit in the mask. */
2806 i = 0x8000;
2807 while ((i & mask) != 0)
2808 i >>= 1;
2809 /* Iterate over all combinations of this and lower bits. */
2810 if (i == 0)
2811 i = 1;
2812 else
2813 i <<= 1;
2814 from = opcode & ~(i - 1);
2815 to = from + i;
2816 for (i = from; i < to; i++) {
2817 if ((i & mask) == opcode)
2818 opcode_table[i] = proc;
2819 }
2820 }
2821
2822 /* Register m68k opcode handlers. Order is important.
2823 Later insn override earlier ones. */
2824 void register_m68k_insns (CPUM68KState *env)
2825 {
2826 #define INSN(name, opcode, mask, feature) do { \
2827 if (m68k_feature(env, M68K_FEATURE_##feature)) \
2828 register_opcode(disas_##name, 0x##opcode, 0x##mask); \
2829 } while(0)
2830 INSN(undef, 0000, 0000, CF_ISA_A);
2831 INSN(arith_im, 0080, fff8, CF_ISA_A);
2832 INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
2833 INSN(bitop_reg, 0100, f1c0, CF_ISA_A);
2834 INSN(bitop_reg, 0140, f1c0, CF_ISA_A);
2835 INSN(bitop_reg, 0180, f1c0, CF_ISA_A);
2836 INSN(bitop_reg, 01c0, f1c0, CF_ISA_A);
2837 INSN(arith_im, 0280, fff8, CF_ISA_A);
2838 INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
2839 INSN(arith_im, 0480, fff8, CF_ISA_A);
2840 INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
2841 INSN(arith_im, 0680, fff8, CF_ISA_A);
2842 INSN(bitop_im, 0800, ffc0, CF_ISA_A);
2843 INSN(bitop_im, 0840, ffc0, CF_ISA_A);
2844 INSN(bitop_im, 0880, ffc0, CF_ISA_A);
2845 INSN(bitop_im, 08c0, ffc0, CF_ISA_A);
2846 INSN(arith_im, 0a80, fff8, CF_ISA_A);
2847 INSN(arith_im, 0c00, ff38, CF_ISA_A);
2848 INSN(move, 1000, f000, CF_ISA_A);
2849 INSN(move, 2000, f000, CF_ISA_A);
2850 INSN(move, 3000, f000, CF_ISA_A);
2851 INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC);
2852 INSN(negx, 4080, fff8, CF_ISA_A);
2853 INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
2854 INSN(lea, 41c0, f1c0, CF_ISA_A);
2855 INSN(clr, 4200, ff00, CF_ISA_A);
2856 INSN(undef, 42c0, ffc0, CF_ISA_A);
2857 INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
2858 INSN(neg, 4480, fff8, CF_ISA_A);
2859 INSN(move_to_ccr, 44c0, ffc0, CF_ISA_A);
2860 INSN(not, 4680, fff8, CF_ISA_A);
2861 INSN(move_to_sr, 46c0, ffc0, CF_ISA_A);
2862 INSN(pea, 4840, ffc0, CF_ISA_A);
2863 INSN(swap, 4840, fff8, CF_ISA_A);
2864 INSN(movem, 48c0, fbc0, CF_ISA_A);
2865 INSN(ext, 4880, fff8, CF_ISA_A);
2866 INSN(ext, 48c0, fff8, CF_ISA_A);
2867 INSN(ext, 49c0, fff8, CF_ISA_A);
2868 INSN(tst, 4a00, ff00, CF_ISA_A);
2869 INSN(tas, 4ac0, ffc0, CF_ISA_B);
2870 INSN(halt, 4ac8, ffff, CF_ISA_A);
2871 INSN(pulse, 4acc, ffff, CF_ISA_A);
2872 INSN(illegal, 4afc, ffff, CF_ISA_A);
2873 INSN(mull, 4c00, ffc0, CF_ISA_A);
2874 INSN(divl, 4c40, ffc0, CF_ISA_A);
2875 INSN(sats, 4c80, fff8, CF_ISA_B);
2876 INSN(trap, 4e40, fff0, CF_ISA_A);
2877 INSN(link, 4e50, fff8, CF_ISA_A);
2878 INSN(unlk, 4e58, fff8, CF_ISA_A);
2879 INSN(move_to_usp, 4e60, fff8, USP);
2880 INSN(move_from_usp, 4e68, fff8, USP);
2881 INSN(nop, 4e71, ffff, CF_ISA_A);
2882 INSN(stop, 4e72, ffff, CF_ISA_A);
2883 INSN(rte, 4e73, ffff, CF_ISA_A);
2884 INSN(rts, 4e75, ffff, CF_ISA_A);
2885 INSN(movec, 4e7b, ffff, CF_ISA_A);
2886 INSN(jump, 4e80, ffc0, CF_ISA_A);
2887 INSN(jump, 4ec0, ffc0, CF_ISA_A);
2888 INSN(addsubq, 5180, f1c0, CF_ISA_A);
2889 INSN(scc, 50c0, f0f8, CF_ISA_A);
2890 INSN(addsubq, 5080, f1c0, CF_ISA_A);
2891 INSN(tpf, 51f8, fff8, CF_ISA_A);
2892
2893 /* Branch instructions. */
2894 INSN(branch, 6000, f000, CF_ISA_A);
2895 /* Disable long branch instructions, then add back the ones we want. */
2896 INSN(undef, 60ff, f0ff, CF_ISA_A); /* All long branches. */
2897 INSN(branch, 60ff, f0ff, CF_ISA_B);
2898 INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */
2899 INSN(branch, 60ff, ffff, BRAL);
2900
2901 INSN(moveq, 7000, f100, CF_ISA_A);
2902 INSN(mvzs, 7100, f100, CF_ISA_B);
2903 INSN(or, 8000, f000, CF_ISA_A);
2904 INSN(divw, 80c0, f0c0, CF_ISA_A);
2905 INSN(addsub, 9000, f000, CF_ISA_A);
2906 INSN(subx, 9180, f1f8, CF_ISA_A);
2907 INSN(suba, 91c0, f1c0, CF_ISA_A);
2908
2909 INSN(undef_mac, a000, f000, CF_ISA_A);
2910 INSN(mac, a000, f100, CF_EMAC);
2911 INSN(from_mac, a180, f9b0, CF_EMAC);
2912 INSN(move_mac, a110, f9fc, CF_EMAC);
2913 INSN(from_macsr,a980, f9f0, CF_EMAC);
2914 INSN(from_mask, ad80, fff0, CF_EMAC);
2915 INSN(from_mext, ab80, fbf0, CF_EMAC);
2916 INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
2917 INSN(to_mac, a100, f9c0, CF_EMAC);
2918 INSN(to_macsr, a900, ffc0, CF_EMAC);
2919 INSN(to_mext, ab00, fbc0, CF_EMAC);
2920 INSN(to_mask, ad00, ffc0, CF_EMAC);
2921
2922 INSN(mov3q, a140, f1c0, CF_ISA_B);
2923 INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
2924 INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
2925 INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
2926 INSN(cmp, b080, f1c0, CF_ISA_A);
2927 INSN(cmpa, b1c0, f1c0, CF_ISA_A);
2928 INSN(eor, b180, f1c0, CF_ISA_A);
2929 INSN(and, c000, f000, CF_ISA_A);
2930 INSN(mulw, c0c0, f0c0, CF_ISA_A);
2931 INSN(addsub, d000, f000, CF_ISA_A);
2932 INSN(addx, d180, f1f8, CF_ISA_A);
2933 INSN(adda, d1c0, f1c0, CF_ISA_A);
2934 INSN(shift_im, e080, f0f0, CF_ISA_A);
2935 INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
2936 INSN(undef_fpu, f000, f000, CF_ISA_A);
2937 INSN(fpu, f200, ffc0, CF_FPU);
2938 INSN(fbcc, f280, ffc0, CF_FPU);
2939 INSN(frestore, f340, ffc0, CF_FPU);
2940 INSN(fsave, f340, ffc0, CF_FPU);
2941 INSN(intouch, f340, ffc0, CF_ISA_A);
2942 INSN(cpushl, f428, ff38, CF_ISA_A);
2943 INSN(wddata, fb00, ff00, CF_ISA_A);
2944 INSN(wdebug, fbc0, ffc0, CF_ISA_A);
2945 #undef INSN
2946 }
2947
2948 /* ??? Some of this implementation is not exception safe. We should always
2949 write back the result to memory before setting the condition codes. */
2950 static void disas_m68k_insn(CPUM68KState * env, DisasContext *s)
2951 {
2952 uint16_t insn;
2953
2954 if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
2955 tcg_gen_debug_insn_start(s->pc);
2956 }
2957
2958 insn = cpu_lduw_code(env, s->pc);
2959 s->pc += 2;
2960
2961 opcode_table[insn](env, s, insn);
2962 }
2963
2964 /* generate intermediate code for basic block 'tb'. */
2965 static inline void
2966 gen_intermediate_code_internal(M68kCPU *cpu, TranslationBlock *tb,
2967 bool search_pc)
2968 {
2969 CPUState *cs = CPU(cpu);
2970 CPUM68KState *env = &cpu->env;
2971 DisasContext dc1, *dc = &dc1;
2972 uint16_t *gen_opc_end;
2973 CPUBreakpoint *bp;
2974 int j, lj;
2975 target_ulong pc_start;
2976 int pc_offset;
2977 int num_insns;
2978 int max_insns;
2979
2980 /* generate intermediate code */
2981 pc_start = tb->pc;
2982
2983 dc->tb = tb;
2984
2985 gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE;
2986
2987 dc->env = env;
2988 dc->is_jmp = DISAS_NEXT;
2989 dc->pc = pc_start;
2990 dc->cc_op = CC_OP_DYNAMIC;
2991 dc->singlestep_enabled = cs->singlestep_enabled;
2992 dc->fpcr = env->fpcr;
2993 dc->user = (env->sr & SR_S) == 0;
2994 dc->is_mem = 0;
2995 dc->done_mac = 0;
2996 lj = -1;
2997 num_insns = 0;
2998 max_insns = tb->cflags & CF_COUNT_MASK;
2999 if (max_insns == 0)
3000 max_insns = CF_COUNT_MASK;
3001
3002 gen_tb_start();
3003 do {
3004 pc_offset = dc->pc - pc_start;
3005 gen_throws_exception = NULL;
3006 if (unlikely(!QTAILQ_EMPTY(&cs->breakpoints))) {
3007 QTAILQ_FOREACH(bp, &cs->breakpoints, entry) {
3008 if (bp->pc == dc->pc) {
3009 gen_exception(dc, dc->pc, EXCP_DEBUG);
3010 dc->is_jmp = DISAS_JUMP;
3011 break;
3012 }
3013 }
3014 if (dc->is_jmp)
3015 break;
3016 }
3017 if (search_pc) {
3018 j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
3019 if (lj < j) {
3020 lj++;
3021 while (lj < j)
3022 tcg_ctx.gen_opc_instr_start[lj++] = 0;
3023 }
3024 tcg_ctx.gen_opc_pc[lj] = dc->pc;
3025 tcg_ctx.gen_opc_instr_start[lj] = 1;
3026 tcg_ctx.gen_opc_icount[lj] = num_insns;
3027 }
3028 if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
3029 gen_io_start();
3030 dc->insn_pc = dc->pc;
3031 disas_m68k_insn(env, dc);
3032 num_insns++;
3033 } while (!dc->is_jmp && tcg_ctx.gen_opc_ptr < gen_opc_end &&
3034 !cs->singlestep_enabled &&
3035 !singlestep &&
3036 (pc_offset) < (TARGET_PAGE_SIZE - 32) &&
3037 num_insns < max_insns);
3038
3039 if (tb->cflags & CF_LAST_IO)
3040 gen_io_end();
3041 if (unlikely(cs->singlestep_enabled)) {
3042 /* Make sure the pc is updated, and raise a debug exception. */
3043 if (!dc->is_jmp) {
3044 gen_flush_cc_op(dc);
3045 tcg_gen_movi_i32(QREG_PC, dc->pc);
3046 }
3047 gen_helper_raise_exception(cpu_env, tcg_const_i32(EXCP_DEBUG));
3048 } else {
3049 switch(dc->is_jmp) {
3050 case DISAS_NEXT:
3051 gen_flush_cc_op(dc);
3052 gen_jmp_tb(dc, 0, dc->pc);
3053 break;
3054 default:
3055 case DISAS_JUMP:
3056 case DISAS_UPDATE:
3057 gen_flush_cc_op(dc);
3058 /* indicate that the hash table must be used to find the next TB */
3059 tcg_gen_exit_tb(0);
3060 break;
3061 case DISAS_TB_JUMP:
3062 /* nothing more to generate */
3063 break;
3064 }
3065 }
3066 gen_tb_end(tb, num_insns);
3067 *tcg_ctx.gen_opc_ptr = INDEX_op_end;
3068
3069 #ifdef DEBUG_DISAS
3070 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
3071 qemu_log("----------------\n");
3072 qemu_log("IN: %s\n", lookup_symbol(pc_start));
3073 log_target_disas(env, pc_start, dc->pc - pc_start, 0);
3074 qemu_log("\n");
3075 }
3076 #endif
3077 if (search_pc) {
3078 j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
3079 lj++;
3080 while (lj <= j)
3081 tcg_ctx.gen_opc_instr_start[lj++] = 0;
3082 } else {
3083 tb->size = dc->pc - pc_start;
3084 tb->icount = num_insns;
3085 }
3086
3087 //optimize_flags();
3088 //expand_target_qops();
3089 }
3090
3091 void gen_intermediate_code(CPUM68KState *env, TranslationBlock *tb)
3092 {
3093 gen_intermediate_code_internal(m68k_env_get_cpu(env), tb, false);
3094 }
3095
3096 void gen_intermediate_code_pc(CPUM68KState *env, TranslationBlock *tb)
3097 {
3098 gen_intermediate_code_internal(m68k_env_get_cpu(env), tb, true);
3099 }
3100
3101 void m68k_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
3102 int flags)
3103 {
3104 M68kCPU *cpu = M68K_CPU(cs);
3105 CPUM68KState *env = &cpu->env;
3106 int i;
3107 uint16_t sr;
3108 CPU_DoubleU u;
3109 for (i = 0; i < 8; i++)
3110 {
3111 u.d = env->fregs[i];
3112 cpu_fprintf (f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n",
3113 i, env->dregs[i], i, env->aregs[i],
3114 i, u.l.upper, u.l.lower, *(double *)&u.d);
3115 }
3116 cpu_fprintf (f, "PC = %08x ", env->pc);
3117 sr = env->sr;
3118 cpu_fprintf (f, "SR = %04x %c%c%c%c%c ", sr, (sr & 0x10) ? 'X' : '-',
3119 (sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-',
3120 (sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-');
3121 cpu_fprintf (f, "FPRESULT = %12g\n", *(double *)&env->fp_result);
3122 }
3123
3124 void restore_state_to_opc(CPUM68KState *env, TranslationBlock *tb, int pc_pos)
3125 {
3126 env->pc = tcg_ctx.gen_opc_pc[pc_pos];
3127 }
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