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[qemu.git] / target-m68k / translate.c
blob422f0a46e9c741540806395a2bded9e4e78eb8ee
1 /*
2 * m68k translation
3 *
4 * Copyright (c) 2005-2007 CodeSourcery
5 * Written by Paul Brook
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
20 */
21 #include <stdarg.h>
22 #include <stdlib.h>
23 #include <stdio.h>
24 #include <string.h>
25 #include <inttypes.h>
26
27 #include "config.h"
28 #include "cpu.h"
29 #include "exec-all.h"
30 #include "disas.h"
31 #include "tcg-op.h"
32 #include "qemu-log.h"
33
34 #include "helpers.h"
35 #define GEN_HELPER 1
36 #include "helpers.h"
37
38 //#define DEBUG_DISPATCH 1
39
40 /* Fake floating point. */
41 #define tcg_gen_mov_f64 tcg_gen_mov_i64
42 #define tcg_gen_qemu_ldf64 tcg_gen_qemu_ld64
43 #define tcg_gen_qemu_stf64 tcg_gen_qemu_st64
44
45 #define DEFO32(name, offset) static TCGv QREG_##name;
46 #define DEFO64(name, offset) static TCGv_i64 QREG_##name;
47 #define DEFF64(name, offset) static TCGv_i64 QREG_##name;
48 #include "qregs.def"
49 #undef DEFO32
50 #undef DEFO64
51 #undef DEFF64
52
53 static TCGv_ptr cpu_env;
54
55 static char cpu_reg_names[3*8*3 + 5*4];
56 static TCGv cpu_dregs[8];
57 static TCGv cpu_aregs[8];
58 static TCGv_i64 cpu_fregs[8];
59 static TCGv_i64 cpu_macc[4];
60
61 #define DREG(insn, pos) cpu_dregs[((insn) >> (pos)) & 7]
62 #define AREG(insn, pos) cpu_aregs[((insn) >> (pos)) & 7]
63 #define FREG(insn, pos) cpu_fregs[((insn) >> (pos)) & 7]
64 #define MACREG(acc) cpu_macc[acc]
65 #define QREG_SP cpu_aregs[7]
66
67 static TCGv NULL_QREG;
68 #define IS_NULL_QREG(t) (TCGV_EQUAL(t, NULL_QREG))
69 /* Used to distinguish stores from bad addressing modes. */
70 static TCGv store_dummy;
71
72 #include "gen-icount.h"
73
74 void m68k_tcg_init(void)
75 {
76 char *p;
77 int i;
78
79 #define DEFO32(name, offset) QREG_##name = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUState, offset), #name);
80 #define DEFO64(name, offset) QREG_##name = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUState, offset), #name);
81 #define DEFF64(name, offset) DEFO64(name, offset)
82 #include "qregs.def"
83 #undef DEFO32
84 #undef DEFO64
85 #undef DEFF64
86
87 cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
88
89 p = cpu_reg_names;
90 for (i = 0; i < 8; i++) {
91 sprintf(p, "D%d", i);
92 cpu_dregs[i] = tcg_global_mem_new(TCG_AREG0,
93 offsetof(CPUM68KState, dregs[i]), p);
94 p += 3;
95 sprintf(p, "A%d", i);
96 cpu_aregs[i] = tcg_global_mem_new(TCG_AREG0,
97 offsetof(CPUM68KState, aregs[i]), p);
98 p += 3;
99 sprintf(p, "F%d", i);
100 cpu_fregs[i] = tcg_global_mem_new_i64(TCG_AREG0,
101 offsetof(CPUM68KState, fregs[i]), p);
102 p += 3;
103 }
104 for (i = 0; i < 4; i++) {
105 sprintf(p, "ACC%d", i);
106 cpu_macc[i] = tcg_global_mem_new_i64(TCG_AREG0,
107 offsetof(CPUM68KState, macc[i]), p);
108 p += 5;
109 }
110
111 NULL_QREG = tcg_global_mem_new(TCG_AREG0, -4, "NULL");
112 store_dummy = tcg_global_mem_new(TCG_AREG0, -8, "NULL");
113
114 #define GEN_HELPER 2
115 #include "helpers.h"
116 }
117
118 static inline void qemu_assert(int cond, const char *msg)
119 {
120 if (!cond) {
121 fprintf (stderr, "badness: %s\n", msg);
122 abort();
123 }
124 }
125
126 /* internal defines */
127 typedef struct DisasContext {
128 CPUM68KState *env;
129 target_ulong insn_pc; /* Start of the current instruction. */
130 target_ulong pc;
131 int is_jmp;
132 int cc_op;
133 int user;
134 uint32_t fpcr;
135 struct TranslationBlock *tb;
136 int singlestep_enabled;
137 int is_mem;
138 TCGv_i64 mactmp;
139 int done_mac;
140 } DisasContext;
141
142 #define DISAS_JUMP_NEXT 4
143
144 #if defined(CONFIG_USER_ONLY)
145 #define IS_USER(s) 1
146 #else
147 #define IS_USER(s) s->user
148 #endif
149
150 /* XXX: move that elsewhere */
151 /* ??? Fix exceptions. */
152 static void *gen_throws_exception;
153 #define gen_last_qop NULL
154
155 #define OS_BYTE 0
156 #define OS_WORD 1
157 #define OS_LONG 2
158 #define OS_SINGLE 4
159 #define OS_DOUBLE 5
160
161 typedef void (*disas_proc)(DisasContext *, uint16_t);
162
163 #ifdef DEBUG_DISPATCH
164 #define DISAS_INSN(name) \
165 static void real_disas_##name (DisasContext *s, uint16_t insn); \
166 static void disas_##name (DisasContext *s, uint16_t insn) { \
167 qemu_log("Dispatch " #name "\n"); \
168 real_disas_##name(s, insn); } \
169 static void real_disas_##name (DisasContext *s, uint16_t insn)
170 #else
171 #define DISAS_INSN(name) \
172 static void disas_##name (DisasContext *s, uint16_t insn)
173 #endif
174
175 /* FIXME: Remove this. */
176 #define gen_im32(val) tcg_const_i32(val)
177
178 /* Generate a load from the specified address. Narrow values are
179 sign extended to full register width. */
180 static inline TCGv gen_load(DisasContext * s, int opsize, TCGv addr, int sign)
181 {
182 TCGv tmp;
183 int index = IS_USER(s);
184 s->is_mem = 1;
185 tmp = tcg_temp_new_i32();
186 switch(opsize) {
187 case OS_BYTE:
188 if (sign)
189 tcg_gen_qemu_ld8s(tmp, addr, index);
190 else
191 tcg_gen_qemu_ld8u(tmp, addr, index);
192 break;
193 case OS_WORD:
194 if (sign)
195 tcg_gen_qemu_ld16s(tmp, addr, index);
196 else
197 tcg_gen_qemu_ld16u(tmp, addr, index);
198 break;
199 case OS_LONG:
200 case OS_SINGLE:
201 tcg_gen_qemu_ld32u(tmp, addr, index);
202 break;
203 default:
204 qemu_assert(0, "bad load size");
205 }
206 gen_throws_exception = gen_last_qop;
207 return tmp;
208 }
209
210 static inline TCGv_i64 gen_load64(DisasContext * s, TCGv addr)
211 {
212 TCGv_i64 tmp;
213 int index = IS_USER(s);
214 s->is_mem = 1;
215 tmp = tcg_temp_new_i64();
216 tcg_gen_qemu_ldf64(tmp, addr, index);
217 gen_throws_exception = gen_last_qop;
218 return tmp;
219 }
220
221 /* Generate a store. */
222 static inline void gen_store(DisasContext *s, int opsize, TCGv addr, TCGv val)
223 {
224 int index = IS_USER(s);
225 s->is_mem = 1;
226 switch(opsize) {
227 case OS_BYTE:
228 tcg_gen_qemu_st8(val, addr, index);
229 break;
230 case OS_WORD:
231 tcg_gen_qemu_st16(val, addr, index);
232 break;
233 case OS_LONG:
234 case OS_SINGLE:
235 tcg_gen_qemu_st32(val, addr, index);
236 break;
237 default:
238 qemu_assert(0, "bad store size");
239 }
240 gen_throws_exception = gen_last_qop;
241 }
242
243 static inline void gen_store64(DisasContext *s, TCGv addr, TCGv_i64 val)
244 {
245 int index = IS_USER(s);
246 s->is_mem = 1;
247 tcg_gen_qemu_stf64(val, addr, index);
248 gen_throws_exception = gen_last_qop;
249 }
250
251 typedef enum {
252 EA_STORE,
253 EA_LOADU,
254 EA_LOADS
255 } ea_what;
256
257 /* Generate an unsigned load if VAL is 0 a signed load if val is -1,
258 otherwise generate a store. */
259 static TCGv gen_ldst(DisasContext *s, int opsize, TCGv addr, TCGv val,
260 ea_what what)
261 {
262 if (what == EA_STORE) {
263 gen_store(s, opsize, addr, val);
264 return store_dummy;
265 } else {
266 return gen_load(s, opsize, addr, what == EA_LOADS);
267 }
268 }
269
270 /* Read a 32-bit immediate constant. */
271 static inline uint32_t read_im32(DisasContext *s)
272 {
273 uint32_t im;
274 im = ((uint32_t)lduw_code(s->pc)) << 16;
275 s->pc += 2;
276 im |= lduw_code(s->pc);
277 s->pc += 2;
278 return im;
279 }
280
281 /* Calculate and address index. */
282 static TCGv gen_addr_index(uint16_t ext, TCGv tmp)
283 {
284 TCGv add;
285 int scale;
286
287 add = (ext & 0x8000) ? AREG(ext, 12) : DREG(ext, 12);
288 if ((ext & 0x800) == 0) {
289 tcg_gen_ext16s_i32(tmp, add);
290 add = tmp;
291 }
292 scale = (ext >> 9) & 3;
293 if (scale != 0) {
294 tcg_gen_shli_i32(tmp, add, scale);
295 add = tmp;
296 }
297 return add;
298 }
299
300 /* Handle a base + index + displacement effective addresss.
301 A NULL_QREG base means pc-relative. */
302 static TCGv gen_lea_indexed(DisasContext *s, int opsize, TCGv base)
303 {
304 uint32_t offset;
305 uint16_t ext;
306 TCGv add;
307 TCGv tmp;
308 uint32_t bd, od;
309
310 offset = s->pc;
311 ext = lduw_code(s->pc);
312 s->pc += 2;
313
314 if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX))
315 return NULL_QREG;
316
317 if (ext & 0x100) {
318 /* full extension word format */
319 if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL))
320 return NULL_QREG;
321
322 if ((ext & 0x30) > 0x10) {
323 /* base displacement */
324 if ((ext & 0x30) == 0x20) {
325 bd = (int16_t)lduw_code(s->pc);
326 s->pc += 2;
327 } else {
328 bd = read_im32(s);
329 }
330 } else {
331 bd = 0;
332 }
333 tmp = tcg_temp_new();
334 if ((ext & 0x44) == 0) {
335 /* pre-index */
336 add = gen_addr_index(ext, tmp);
337 } else {
338 add = NULL_QREG;
339 }
340 if ((ext & 0x80) == 0) {
341 /* base not suppressed */
342 if (IS_NULL_QREG(base)) {
343 base = gen_im32(offset + bd);
344 bd = 0;
345 }
346 if (!IS_NULL_QREG(add)) {
347 tcg_gen_add_i32(tmp, add, base);
348 add = tmp;
349 } else {
350 add = base;
351 }
352 }
353 if (!IS_NULL_QREG(add)) {
354 if (bd != 0) {
355 tcg_gen_addi_i32(tmp, add, bd);
356 add = tmp;
357 }
358 } else {
359 add = gen_im32(bd);
360 }
361 if ((ext & 3) != 0) {
362 /* memory indirect */
363 base = gen_load(s, OS_LONG, add, 0);
364 if ((ext & 0x44) == 4) {
365 add = gen_addr_index(ext, tmp);
366 tcg_gen_add_i32(tmp, add, base);
367 add = tmp;
368 } else {
369 add = base;
370 }
371 if ((ext & 3) > 1) {
372 /* outer displacement */
373 if ((ext & 3) == 2) {
374 od = (int16_t)lduw_code(s->pc);
375 s->pc += 2;
376 } else {
377 od = read_im32(s);
378 }
379 } else {
380 od = 0;
381 }
382 if (od != 0) {
383 tcg_gen_addi_i32(tmp, add, od);
384 add = tmp;
385 }
386 }
387 } else {
388 /* brief extension word format */
389 tmp = tcg_temp_new();
390 add = gen_addr_index(ext, tmp);
391 if (!IS_NULL_QREG(base)) {
392 tcg_gen_add_i32(tmp, add, base);
393 if ((int8_t)ext)
394 tcg_gen_addi_i32(tmp, tmp, (int8_t)ext);
395 } else {
396 tcg_gen_addi_i32(tmp, add, offset + (int8_t)ext);
397 }
398 add = tmp;
399 }
400 return add;
401 }
402
403 /* Update the CPU env CC_OP state. */
404 static inline void gen_flush_cc_op(DisasContext *s)
405 {
406 if (s->cc_op != CC_OP_DYNAMIC)
407 tcg_gen_movi_i32(QREG_CC_OP, s->cc_op);
408 }
409
410 /* Evaluate all the CC flags. */
411 static inline void gen_flush_flags(DisasContext *s)
412 {
413 if (s->cc_op == CC_OP_FLAGS)
414 return;
415 gen_flush_cc_op(s);
416 gen_helper_flush_flags(cpu_env, QREG_CC_OP);
417 s->cc_op = CC_OP_FLAGS;
418 }
419
420 static void gen_logic_cc(DisasContext *s, TCGv val)
421 {
422 tcg_gen_mov_i32(QREG_CC_DEST, val);
423 s->cc_op = CC_OP_LOGIC;
424 }
425
426 static void gen_update_cc_add(TCGv dest, TCGv src)
427 {
428 tcg_gen_mov_i32(QREG_CC_DEST, dest);
429 tcg_gen_mov_i32(QREG_CC_SRC, src);
430 }
431
432 static inline int opsize_bytes(int opsize)
433 {
434 switch (opsize) {
435 case OS_BYTE: return 1;
436 case OS_WORD: return 2;
437 case OS_LONG: return 4;
438 case OS_SINGLE: return 4;
439 case OS_DOUBLE: return 8;
440 default:
441 qemu_assert(0, "bad operand size");
442 return 0;
443 }
444 }
445
446 /* Assign value to a register. If the width is less than the register width
447 only the low part of the register is set. */
448 static void gen_partset_reg(int opsize, TCGv reg, TCGv val)
449 {
450 TCGv tmp;
451 switch (opsize) {
452 case OS_BYTE:
453 tcg_gen_andi_i32(reg, reg, 0xffffff00);
454 tmp = tcg_temp_new();
455 tcg_gen_ext8u_i32(tmp, val);
456 tcg_gen_or_i32(reg, reg, tmp);
457 break;
458 case OS_WORD:
459 tcg_gen_andi_i32(reg, reg, 0xffff0000);
460 tmp = tcg_temp_new();
461 tcg_gen_ext16u_i32(tmp, val);
462 tcg_gen_or_i32(reg, reg, tmp);
463 break;
464 case OS_LONG:
465 case OS_SINGLE:
466 tcg_gen_mov_i32(reg, val);
467 break;
468 default:
469 qemu_assert(0, "Bad operand size");
470 break;
471 }
472 }
473
474 /* Sign or zero extend a value. */
475 static inline TCGv gen_extend(TCGv val, int opsize, int sign)
476 {
477 TCGv tmp;
478
479 switch (opsize) {
480 case OS_BYTE:
481 tmp = tcg_temp_new();
482 if (sign)
483 tcg_gen_ext8s_i32(tmp, val);
484 else
485 tcg_gen_ext8u_i32(tmp, val);
486 break;
487 case OS_WORD:
488 tmp = tcg_temp_new();
489 if (sign)
490 tcg_gen_ext16s_i32(tmp, val);
491 else
492 tcg_gen_ext16u_i32(tmp, val);
493 break;
494 case OS_LONG:
495 case OS_SINGLE:
496 tmp = val;
497 break;
498 default:
499 qemu_assert(0, "Bad operand size");
500 }
501 return tmp;
502 }
503
504 /* Generate code for an "effective address". Does not adjust the base
505 register for autoincrement addressing modes. */
506 static TCGv gen_lea(DisasContext *s, uint16_t insn, int opsize)
507 {
508 TCGv reg;
509 TCGv tmp;
510 uint16_t ext;
511 uint32_t offset;
512
513 switch ((insn >> 3) & 7) {
514 case 0: /* Data register direct. */
515 case 1: /* Address register direct. */
516 return NULL_QREG;
517 case 2: /* Indirect register */
518 case 3: /* Indirect postincrement. */
519 return AREG(insn, 0);
520 case 4: /* Indirect predecrememnt. */
521 reg = AREG(insn, 0);
522 tmp = tcg_temp_new();
523 tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize));
524 return tmp;
525 case 5: /* Indirect displacement. */
526 reg = AREG(insn, 0);
527 tmp = tcg_temp_new();
528 ext = lduw_code(s->pc);
529 s->pc += 2;
530 tcg_gen_addi_i32(tmp, reg, (int16_t)ext);
531 return tmp;
532 case 6: /* Indirect index + displacement. */
533 reg = AREG(insn, 0);
534 return gen_lea_indexed(s, opsize, reg);
535 case 7: /* Other */
536 switch (insn & 7) {
537 case 0: /* Absolute short. */
538 offset = ldsw_code(s->pc);
539 s->pc += 2;
540 return gen_im32(offset);
541 case 1: /* Absolute long. */
542 offset = read_im32(s);
543 return gen_im32(offset);
544 case 2: /* pc displacement */
545 tmp = tcg_temp_new();
546 offset = s->pc;
547 offset += ldsw_code(s->pc);
548 s->pc += 2;
549 return gen_im32(offset);
550 case 3: /* pc index+displacement. */
551 return gen_lea_indexed(s, opsize, NULL_QREG);
552 case 4: /* Immediate. */
553 default:
554 return NULL_QREG;
555 }
556 }
557 /* Should never happen. */
558 return NULL_QREG;
559 }
560
561 /* Helper function for gen_ea. Reuse the computed address between the
562 for read/write operands. */
563 static inline TCGv gen_ea_once(DisasContext *s, uint16_t insn, int opsize,
564 TCGv val, TCGv *addrp, ea_what what)
565 {
566 TCGv tmp;
567
568 if (addrp && what == EA_STORE) {
569 tmp = *addrp;
570 } else {
571 tmp = gen_lea(s, insn, opsize);
572 if (IS_NULL_QREG(tmp))
573 return tmp;
574 if (addrp)
575 *addrp = tmp;
576 }
577 return gen_ldst(s, opsize, tmp, val, what);
578 }
579
580 /* Generate code to load/store a value ito/from an EA. If VAL > 0 this is
581 a write otherwise it is a read (0 == sign extend, -1 == zero extend).
582 ADDRP is non-null for readwrite operands. */
583 static TCGv gen_ea(DisasContext *s, uint16_t insn, int opsize, TCGv val,
584 TCGv *addrp, ea_what what)
585 {
586 TCGv reg;
587 TCGv result;
588 uint32_t offset;
589
590 switch ((insn >> 3) & 7) {
591 case 0: /* Data register direct. */
592 reg = DREG(insn, 0);
593 if (what == EA_STORE) {
594 gen_partset_reg(opsize, reg, val);
595 return store_dummy;
596 } else {
597 return gen_extend(reg, opsize, what == EA_LOADS);
598 }
599 case 1: /* Address register direct. */
600 reg = AREG(insn, 0);
601 if (what == EA_STORE) {
602 tcg_gen_mov_i32(reg, val);
603 return store_dummy;
604 } else {
605 return gen_extend(reg, opsize, what == EA_LOADS);
606 }
607 case 2: /* Indirect register */
608 reg = AREG(insn, 0);
609 return gen_ldst(s, opsize, reg, val, what);
610 case 3: /* Indirect postincrement. */
611 reg = AREG(insn, 0);
612 result = gen_ldst(s, opsize, reg, val, what);
613 /* ??? This is not exception safe. The instruction may still
614 fault after this point. */
615 if (what == EA_STORE || !addrp)
616 tcg_gen_addi_i32(reg, reg, opsize_bytes(opsize));
617 return result;
618 case 4: /* Indirect predecrememnt. */
619 {
620 TCGv tmp;
621 if (addrp && what == EA_STORE) {
622 tmp = *addrp;
623 } else {
624 tmp = gen_lea(s, insn, opsize);
625 if (IS_NULL_QREG(tmp))
626 return tmp;
627 if (addrp)
628 *addrp = tmp;
629 }
630 result = gen_ldst(s, opsize, tmp, val, what);
631 /* ??? This is not exception safe. The instruction may still
632 fault after this point. */
633 if (what == EA_STORE || !addrp) {
634 reg = AREG(insn, 0);
635 tcg_gen_mov_i32(reg, tmp);
636 }
637 }
638 return result;
639 case 5: /* Indirect displacement. */
640 case 6: /* Indirect index + displacement. */
641 return gen_ea_once(s, insn, opsize, val, addrp, what);
642 case 7: /* Other */
643 switch (insn & 7) {
644 case 0: /* Absolute short. */
645 case 1: /* Absolute long. */
646 case 2: /* pc displacement */
647 case 3: /* pc index+displacement. */
648 return gen_ea_once(s, insn, opsize, val, addrp, what);
649 case 4: /* Immediate. */
650 /* Sign extend values for consistency. */
651 switch (opsize) {
652 case OS_BYTE:
653 if (what == EA_LOADS)
654 offset = ldsb_code(s->pc + 1);
655 else
656 offset = ldub_code(s->pc + 1);
657 s->pc += 2;
658 break;
659 case OS_WORD:
660 if (what == EA_LOADS)
661 offset = ldsw_code(s->pc);
662 else
663 offset = lduw_code(s->pc);
664 s->pc += 2;
665 break;
666 case OS_LONG:
667 offset = read_im32(s);
668 break;
669 default:
670 qemu_assert(0, "Bad immediate operand");
671 }
672 return tcg_const_i32(offset);
673 default:
674 return NULL_QREG;
675 }
676 }
677 /* Should never happen. */
678 return NULL_QREG;
679 }
680
681 /* This generates a conditional branch, clobbering all temporaries. */
682 static void gen_jmpcc(DisasContext *s, int cond, int l1)
683 {
684 TCGv tmp;
685
686 /* TODO: Optimize compare/branch pairs rather than always flushing
687 flag state to CC_OP_FLAGS. */
688 gen_flush_flags(s);
689 switch (cond) {
690 case 0: /* T */
691 tcg_gen_br(l1);
692 break;
693 case 1: /* F */
694 break;
695 case 2: /* HI (!C && !Z) */
696 tmp = tcg_temp_new();
697 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z);
698 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
699 break;
700 case 3: /* LS (C || Z) */
701 tmp = tcg_temp_new();
702 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z);
703 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
704 break;
705 case 4: /* CC (!C) */
706 tmp = tcg_temp_new();
707 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C);
708 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
709 break;
710 case 5: /* CS (C) */
711 tmp = tcg_temp_new();
712 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C);
713 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
714 break;
715 case 6: /* NE (!Z) */
716 tmp = tcg_temp_new();
717 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z);
718 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
719 break;
720 case 7: /* EQ (Z) */
721 tmp = tcg_temp_new();
722 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z);
723 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
724 break;
725 case 8: /* VC (!V) */
726 tmp = tcg_temp_new();
727 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V);
728 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
729 break;
730 case 9: /* VS (V) */
731 tmp = tcg_temp_new();
732 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V);
733 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
734 break;
735 case 10: /* PL (!N) */
736 tmp = tcg_temp_new();
737 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
738 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
739 break;
740 case 11: /* MI (N) */
741 tmp = tcg_temp_new();
742 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
743 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
744 break;
745 case 12: /* GE (!(N ^ V)) */
746 tmp = tcg_temp_new();
747 assert(CCF_V == (CCF_N >> 2));
748 tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2);
749 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
750 tcg_gen_andi_i32(tmp, tmp, CCF_V);
751 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
752 break;
753 case 13: /* LT (N ^ V) */
754 tmp = tcg_temp_new();
755 assert(CCF_V == (CCF_N >> 2));
756 tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2);
757 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
758 tcg_gen_andi_i32(tmp, tmp, CCF_V);
759 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
760 break;
761 case 14: /* GT (!(Z || (N ^ V))) */
762 tmp = tcg_temp_new();
763 assert(CCF_V == (CCF_N >> 2));
764 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
765 tcg_gen_shri_i32(tmp, tmp, 2);
766 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
767 tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z);
768 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
769 break;
770 case 15: /* LE (Z || (N ^ V)) */
771 tmp = tcg_temp_new();
772 assert(CCF_V == (CCF_N >> 2));
773 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
774 tcg_gen_shri_i32(tmp, tmp, 2);
775 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
776 tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z);
777 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
778 break;
779 default:
780 /* Should ever happen. */
781 abort();
782 }
783 }
784
785 DISAS_INSN(scc)
786 {
787 int l1;
788 int cond;
789 TCGv reg;
790
791 l1 = gen_new_label();
792 cond = (insn >> 8) & 0xf;
793 reg = DREG(insn, 0);
794 tcg_gen_andi_i32(reg, reg, 0xffffff00);
795 /* This is safe because we modify the reg directly, with no other values
796 live. */
797 gen_jmpcc(s, cond ^ 1, l1);
798 tcg_gen_ori_i32(reg, reg, 0xff);
799 gen_set_label(l1);
800 }
801
802 /* Force a TB lookup after an instruction that changes the CPU state. */
803 static void gen_lookup_tb(DisasContext *s)
804 {
805 gen_flush_cc_op(s);
806 tcg_gen_movi_i32(QREG_PC, s->pc);
807 s->is_jmp = DISAS_UPDATE;
808 }
809
810 /* Generate a jump to an immediate address. */
811 static void gen_jmp_im(DisasContext *s, uint32_t dest)
812 {
813 gen_flush_cc_op(s);
814 tcg_gen_movi_i32(QREG_PC, dest);
815 s->is_jmp = DISAS_JUMP;
816 }
817
818 /* Generate a jump to the address in qreg DEST. */
819 static void gen_jmp(DisasContext *s, TCGv dest)
820 {
821 gen_flush_cc_op(s);
822 tcg_gen_mov_i32(QREG_PC, dest);
823 s->is_jmp = DISAS_JUMP;
824 }
825
826 static void gen_exception(DisasContext *s, uint32_t where, int nr)
827 {
828 gen_flush_cc_op(s);
829 gen_jmp_im(s, where);
830 gen_helper_raise_exception(tcg_const_i32(nr));
831 }
832
833 static inline void gen_addr_fault(DisasContext *s)
834 {
835 gen_exception(s, s->insn_pc, EXCP_ADDRESS);
836 }
837
838 #define SRC_EA(result, opsize, op_sign, addrp) do { \
839 result = gen_ea(s, insn, opsize, NULL_QREG, addrp, op_sign ? EA_LOADS : EA_LOADU); \
840 if (IS_NULL_QREG(result)) { \
841 gen_addr_fault(s); \
842 return; \
843 } \
844 } while (0)
845
846 #define DEST_EA(insn, opsize, val, addrp) do { \
847 TCGv ea_result = gen_ea(s, insn, opsize, val, addrp, EA_STORE); \
848 if (IS_NULL_QREG(ea_result)) { \
849 gen_addr_fault(s); \
850 return; \
851 } \
852 } while (0)
853
854 /* Generate a jump to an immediate address. */
855 static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
856 {
857 TranslationBlock *tb;
858
859 tb = s->tb;
860 if (unlikely(s->singlestep_enabled)) {
861 gen_exception(s, dest, EXCP_DEBUG);
862 } else if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) ||
863 (s->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
864 tcg_gen_goto_tb(n);
865 tcg_gen_movi_i32(QREG_PC, dest);
866 tcg_gen_exit_tb((long)tb + n);
867 } else {
868 gen_jmp_im(s, dest);
869 tcg_gen_exit_tb(0);
870 }
871 s->is_jmp = DISAS_TB_JUMP;
872 }
873
874 DISAS_INSN(undef_mac)
875 {
876 gen_exception(s, s->pc - 2, EXCP_LINEA);
877 }
878
879 DISAS_INSN(undef_fpu)
880 {
881 gen_exception(s, s->pc - 2, EXCP_LINEF);
882 }
883
884 DISAS_INSN(undef)
885 {
886 gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
887 cpu_abort(cpu_single_env, "Illegal instruction: %04x @ %08x",
888 insn, s->pc - 2);
889 }
890
891 DISAS_INSN(mulw)
892 {
893 TCGv reg;
894 TCGv tmp;
895 TCGv src;
896 int sign;
897
898 sign = (insn & 0x100) != 0;
899 reg = DREG(insn, 9);
900 tmp = tcg_temp_new();
901 if (sign)
902 tcg_gen_ext16s_i32(tmp, reg);
903 else
904 tcg_gen_ext16u_i32(tmp, reg);
905 SRC_EA(src, OS_WORD, sign, NULL);
906 tcg_gen_mul_i32(tmp, tmp, src);
907 tcg_gen_mov_i32(reg, tmp);
908 /* Unlike m68k, coldfire always clears the overflow bit. */
909 gen_logic_cc(s, tmp);
910 }
911
912 DISAS_INSN(divw)
913 {
914 TCGv reg;
915 TCGv tmp;
916 TCGv src;
917 int sign;
918
919 sign = (insn & 0x100) != 0;
920 reg = DREG(insn, 9);
921 if (sign) {
922 tcg_gen_ext16s_i32(QREG_DIV1, reg);
923 } else {
924 tcg_gen_ext16u_i32(QREG_DIV1, reg);
925 }
926 SRC_EA(src, OS_WORD, sign, NULL);
927 tcg_gen_mov_i32(QREG_DIV2, src);
928 if (sign) {
929 gen_helper_divs(cpu_env, tcg_const_i32(1));
930 } else {
931 gen_helper_divu(cpu_env, tcg_const_i32(1));
932 }
933
934 tmp = tcg_temp_new();
935 src = tcg_temp_new();
936 tcg_gen_ext16u_i32(tmp, QREG_DIV1);
937 tcg_gen_shli_i32(src, QREG_DIV2, 16);
938 tcg_gen_or_i32(reg, tmp, src);
939 s->cc_op = CC_OP_FLAGS;
940 }
941
942 DISAS_INSN(divl)
943 {
944 TCGv num;
945 TCGv den;
946 TCGv reg;
947 uint16_t ext;
948
949 ext = lduw_code(s->pc);
950 s->pc += 2;
951 if (ext & 0x87f8) {
952 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
953 return;
954 }
955 num = DREG(ext, 12);
956 reg = DREG(ext, 0);
957 tcg_gen_mov_i32(QREG_DIV1, num);
958 SRC_EA(den, OS_LONG, 0, NULL);
959 tcg_gen_mov_i32(QREG_DIV2, den);
960 if (ext & 0x0800) {
961 gen_helper_divs(cpu_env, tcg_const_i32(0));
962 } else {
963 gen_helper_divu(cpu_env, tcg_const_i32(0));
964 }
965 if ((ext & 7) == ((ext >> 12) & 7)) {
966 /* div */
967 tcg_gen_mov_i32 (reg, QREG_DIV1);
968 } else {
969 /* rem */
970 tcg_gen_mov_i32 (reg, QREG_DIV2);
971 }
972 s->cc_op = CC_OP_FLAGS;
973 }
974
975 DISAS_INSN(addsub)
976 {
977 TCGv reg;
978 TCGv dest;
979 TCGv src;
980 TCGv tmp;
981 TCGv addr;
982 int add;
983
984 add = (insn & 0x4000) != 0;
985 reg = DREG(insn, 9);
986 dest = tcg_temp_new();
987 if (insn & 0x100) {
988 SRC_EA(tmp, OS_LONG, 0, &addr);
989 src = reg;
990 } else {
991 tmp = reg;
992 SRC_EA(src, OS_LONG, 0, NULL);
993 }
994 if (add) {
995 tcg_gen_add_i32(dest, tmp, src);
996 gen_helper_xflag_lt(QREG_CC_X, dest, src);
997 s->cc_op = CC_OP_ADD;
998 } else {
999 gen_helper_xflag_lt(QREG_CC_X, tmp, src);
1000 tcg_gen_sub_i32(dest, tmp, src);
1001 s->cc_op = CC_OP_SUB;
1002 }
1003 gen_update_cc_add(dest, src);
1004 if (insn & 0x100) {
1005 DEST_EA(insn, OS_LONG, dest, &addr);
1006 } else {
1007 tcg_gen_mov_i32(reg, dest);
1008 }
1009 }
1010
1011
1012 /* Reverse the order of the bits in REG. */
1013 DISAS_INSN(bitrev)
1014 {
1015 TCGv reg;
1016 reg = DREG(insn, 0);
1017 gen_helper_bitrev(reg, reg);
1018 }
1019
1020 DISAS_INSN(bitop_reg)
1021 {
1022 int opsize;
1023 int op;
1024 TCGv src1;
1025 TCGv src2;
1026 TCGv tmp;
1027 TCGv addr;
1028 TCGv dest;
1029
1030 if ((insn & 0x38) != 0)
1031 opsize = OS_BYTE;
1032 else
1033 opsize = OS_LONG;
1034 op = (insn >> 6) & 3;
1035 SRC_EA(src1, opsize, 0, op ? &addr: NULL);
1036 src2 = DREG(insn, 9);
1037 dest = tcg_temp_new();
1038
1039 gen_flush_flags(s);
1040 tmp = tcg_temp_new();
1041 if (opsize == OS_BYTE)
1042 tcg_gen_andi_i32(tmp, src2, 7);
1043 else
1044 tcg_gen_andi_i32(tmp, src2, 31);
1045 src2 = tmp;
1046 tmp = tcg_temp_new();
1047 tcg_gen_shr_i32(tmp, src1, src2);
1048 tcg_gen_andi_i32(tmp, tmp, 1);
1049 tcg_gen_shli_i32(tmp, tmp, 2);
1050 /* Clear CCF_Z if bit set. */
1051 tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
1052 tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1053
1054 tcg_gen_shl_i32(tmp, tcg_const_i32(1), src2);
1055 switch (op) {
1056 case 1: /* bchg */
1057 tcg_gen_xor_i32(dest, src1, tmp);
1058 break;
1059 case 2: /* bclr */
1060 tcg_gen_not_i32(tmp, tmp);
1061 tcg_gen_and_i32(dest, src1, tmp);
1062 break;
1063 case 3: /* bset */
1064 tcg_gen_or_i32(dest, src1, tmp);
1065 break;
1066 default: /* btst */
1067 break;
1068 }
1069 if (op)
1070 DEST_EA(insn, opsize, dest, &addr);
1071 }
1072
1073 DISAS_INSN(sats)
1074 {
1075 TCGv reg;
1076 reg = DREG(insn, 0);
1077 gen_flush_flags(s);
1078 gen_helper_sats(reg, reg, QREG_CC_DEST);
1079 gen_logic_cc(s, reg);
1080 }
1081
1082 static void gen_push(DisasContext *s, TCGv val)
1083 {
1084 TCGv tmp;
1085
1086 tmp = tcg_temp_new();
1087 tcg_gen_subi_i32(tmp, QREG_SP, 4);
1088 gen_store(s, OS_LONG, tmp, val);
1089 tcg_gen_mov_i32(QREG_SP, tmp);
1090 }
1091
1092 DISAS_INSN(movem)
1093 {
1094 TCGv addr;
1095 int i;
1096 uint16_t mask;
1097 TCGv reg;
1098 TCGv tmp;
1099 int is_load;
1100
1101 mask = lduw_code(s->pc);
1102 s->pc += 2;
1103 tmp = gen_lea(s, insn, OS_LONG);
1104 if (IS_NULL_QREG(tmp)) {
1105 gen_addr_fault(s);
1106 return;
1107 }
1108 addr = tcg_temp_new();
1109 tcg_gen_mov_i32(addr, tmp);
1110 is_load = ((insn & 0x0400) != 0);
1111 for (i = 0; i < 16; i++, mask >>= 1) {
1112 if (mask & 1) {
1113 if (i < 8)
1114 reg = DREG(i, 0);
1115 else
1116 reg = AREG(i, 0);
1117 if (is_load) {
1118 tmp = gen_load(s, OS_LONG, addr, 0);
1119 tcg_gen_mov_i32(reg, tmp);
1120 } else {
1121 gen_store(s, OS_LONG, addr, reg);
1122 }
1123 if (mask != 1)
1124 tcg_gen_addi_i32(addr, addr, 4);
1125 }
1126 }
1127 }
1128
1129 DISAS_INSN(bitop_im)
1130 {
1131 int opsize;
1132 int op;
1133 TCGv src1;
1134 uint32_t mask;
1135 int bitnum;
1136 TCGv tmp;
1137 TCGv addr;
1138
1139 if ((insn & 0x38) != 0)
1140 opsize = OS_BYTE;
1141 else
1142 opsize = OS_LONG;
1143 op = (insn >> 6) & 3;
1144
1145 bitnum = lduw_code(s->pc);
1146 s->pc += 2;
1147 if (bitnum & 0xff00) {
1148 disas_undef(s, insn);
1149 return;
1150 }
1151
1152 SRC_EA(src1, opsize, 0, op ? &addr: NULL);
1153
1154 gen_flush_flags(s);
1155 if (opsize == OS_BYTE)
1156 bitnum &= 7;
1157 else
1158 bitnum &= 31;
1159 mask = 1 << bitnum;
1160
1161 tmp = tcg_temp_new();
1162 assert (CCF_Z == (1 << 2));
1163 if (bitnum > 2)
1164 tcg_gen_shri_i32(tmp, src1, bitnum - 2);
1165 else if (bitnum < 2)
1166 tcg_gen_shli_i32(tmp, src1, 2 - bitnum);
1167 else
1168 tcg_gen_mov_i32(tmp, src1);
1169 tcg_gen_andi_i32(tmp, tmp, CCF_Z);
1170 /* Clear CCF_Z if bit set. */
1171 tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
1172 tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1173 if (op) {
1174 switch (op) {
1175 case 1: /* bchg */
1176 tcg_gen_xori_i32(tmp, src1, mask);
1177 break;
1178 case 2: /* bclr */
1179 tcg_gen_andi_i32(tmp, src1, ~mask);
1180 break;
1181 case 3: /* bset */
1182 tcg_gen_ori_i32(tmp, src1, mask);
1183 break;
1184 default: /* btst */
1185 break;
1186 }
1187 DEST_EA(insn, opsize, tmp, &addr);
1188 }
1189 }
1190
1191 DISAS_INSN(arith_im)
1192 {
1193 int op;
1194 uint32_t im;
1195 TCGv src1;
1196 TCGv dest;
1197 TCGv addr;
1198
1199 op = (insn >> 9) & 7;
1200 SRC_EA(src1, OS_LONG, 0, (op == 6) ? NULL : &addr);
1201 im = read_im32(s);
1202 dest = tcg_temp_new();
1203 switch (op) {
1204 case 0: /* ori */
1205 tcg_gen_ori_i32(dest, src1, im);
1206 gen_logic_cc(s, dest);
1207 break;
1208 case 1: /* andi */
1209 tcg_gen_andi_i32(dest, src1, im);
1210 gen_logic_cc(s, dest);
1211 break;
1212 case 2: /* subi */
1213 tcg_gen_mov_i32(dest, src1);
1214 gen_helper_xflag_lt(QREG_CC_X, dest, gen_im32(im));
1215 tcg_gen_subi_i32(dest, dest, im);
1216 gen_update_cc_add(dest, gen_im32(im));
1217 s->cc_op = CC_OP_SUB;
1218 break;
1219 case 3: /* addi */
1220 tcg_gen_mov_i32(dest, src1);
1221 tcg_gen_addi_i32(dest, dest, im);
1222 gen_update_cc_add(dest, gen_im32(im));
1223 gen_helper_xflag_lt(QREG_CC_X, dest, gen_im32(im));
1224 s->cc_op = CC_OP_ADD;
1225 break;
1226 case 5: /* eori */
1227 tcg_gen_xori_i32(dest, src1, im);
1228 gen_logic_cc(s, dest);
1229 break;
1230 case 6: /* cmpi */
1231 tcg_gen_mov_i32(dest, src1);
1232 tcg_gen_subi_i32(dest, dest, im);
1233 gen_update_cc_add(dest, gen_im32(im));
1234 s->cc_op = CC_OP_SUB;
1235 break;
1236 default:
1237 abort();
1238 }
1239 if (op != 6) {
1240 DEST_EA(insn, OS_LONG, dest, &addr);
1241 }
1242 }
1243
1244 DISAS_INSN(byterev)
1245 {
1246 TCGv reg;
1247
1248 reg = DREG(insn, 0);
1249 tcg_gen_bswap32_i32(reg, reg);
1250 }
1251
1252 DISAS_INSN(move)
1253 {
1254 TCGv src;
1255 TCGv dest;
1256 int op;
1257 int opsize;
1258
1259 switch (insn >> 12) {
1260 case 1: /* move.b */
1261 opsize = OS_BYTE;
1262 break;
1263 case 2: /* move.l */
1264 opsize = OS_LONG;
1265 break;
1266 case 3: /* move.w */
1267 opsize = OS_WORD;
1268 break;
1269 default:
1270 abort();
1271 }
1272 SRC_EA(src, opsize, 1, NULL);
1273 op = (insn >> 6) & 7;
1274 if (op == 1) {
1275 /* movea */
1276 /* The value will already have been sign extended. */
1277 dest = AREG(insn, 9);
1278 tcg_gen_mov_i32(dest, src);
1279 } else {
1280 /* normal move */
1281 uint16_t dest_ea;
1282 dest_ea = ((insn >> 9) & 7) | (op << 3);
1283 DEST_EA(dest_ea, opsize, src, NULL);
1284 /* This will be correct because loads sign extend. */
1285 gen_logic_cc(s, src);
1286 }
1287 }
1288
1289 DISAS_INSN(negx)
1290 {
1291 TCGv reg;
1292
1293 gen_flush_flags(s);
1294 reg = DREG(insn, 0);
1295 gen_helper_subx_cc(reg, cpu_env, tcg_const_i32(0), reg);
1296 }
1297
1298 DISAS_INSN(lea)
1299 {
1300 TCGv reg;
1301 TCGv tmp;
1302
1303 reg = AREG(insn, 9);
1304 tmp = gen_lea(s, insn, OS_LONG);
1305 if (IS_NULL_QREG(tmp)) {
1306 gen_addr_fault(s);
1307 return;
1308 }
1309 tcg_gen_mov_i32(reg, tmp);
1310 }
1311
1312 DISAS_INSN(clr)
1313 {
1314 int opsize;
1315
1316 switch ((insn >> 6) & 3) {
1317 case 0: /* clr.b */
1318 opsize = OS_BYTE;
1319 break;
1320 case 1: /* clr.w */
1321 opsize = OS_WORD;
1322 break;
1323 case 2: /* clr.l */
1324 opsize = OS_LONG;
1325 break;
1326 default:
1327 abort();
1328 }
1329 DEST_EA(insn, opsize, gen_im32(0), NULL);
1330 gen_logic_cc(s, gen_im32(0));
1331 }
1332
1333 static TCGv gen_get_ccr(DisasContext *s)
1334 {
1335 TCGv dest;
1336
1337 gen_flush_flags(s);
1338 dest = tcg_temp_new();
1339 tcg_gen_shli_i32(dest, QREG_CC_X, 4);
1340 tcg_gen_or_i32(dest, dest, QREG_CC_DEST);
1341 return dest;
1342 }
1343
1344 DISAS_INSN(move_from_ccr)
1345 {
1346 TCGv reg;
1347 TCGv ccr;
1348
1349 ccr = gen_get_ccr(s);
1350 reg = DREG(insn, 0);
1351 gen_partset_reg(OS_WORD, reg, ccr);
1352 }
1353
1354 DISAS_INSN(neg)
1355 {
1356 TCGv reg;
1357 TCGv src1;
1358
1359 reg = DREG(insn, 0);
1360 src1 = tcg_temp_new();
1361 tcg_gen_mov_i32(src1, reg);
1362 tcg_gen_neg_i32(reg, src1);
1363 s->cc_op = CC_OP_SUB;
1364 gen_update_cc_add(reg, src1);
1365 gen_helper_xflag_lt(QREG_CC_X, tcg_const_i32(0), src1);
1366 s->cc_op = CC_OP_SUB;
1367 }
1368
1369 static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
1370 {
1371 tcg_gen_movi_i32(QREG_CC_DEST, val & 0xf);
1372 tcg_gen_movi_i32(QREG_CC_X, (val & 0x10) >> 4);
1373 if (!ccr_only) {
1374 gen_helper_set_sr(cpu_env, tcg_const_i32(val & 0xff00));
1375 }
1376 }
1377
1378 static void gen_set_sr(DisasContext *s, uint16_t insn, 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 = lduw_code(s->pc);
1399 s->pc += 2;
1400 gen_set_sr_im(s, val, ccr_only);
1401 }
1402 else
1403 disas_undef(s, insn);
1404 }
1405
1406 DISAS_INSN(move_to_ccr)
1407 {
1408 gen_set_sr(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(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(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(src1, OS_BYTE, 1, &addr);
1508 gen_logic_cc(s, src1);
1509 tcg_gen_ori_i32(dest, src1, 0x80);
1510 DEST_EA(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 = lduw_code(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(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 = ldsw_code(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(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, gen_im32(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(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 = gen_im32(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(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(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 = ldsw_code(s->pc);
1665 s->pc += 2;
1666 } else if (offset == -1) {
1667 offset = read_im32(s);
1668 }
1669 if (op == 1) {
1670 /* bsr */
1671 gen_push(s, gen_im32(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(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(src, OS_LONG, 0, &addr);
1723 tcg_gen_or_i32(dest, src, reg);
1724 DEST_EA(insn, OS_LONG, dest, &addr);
1725 } else {
1726 SRC_EA(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(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 = gen_im32(val);
1763 gen_logic_cc(s, src);
1764 DEST_EA(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(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(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(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(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(src, OS_LONG, 0, &addr);
1845 tcg_gen_and_i32(dest, src, reg);
1846 DEST_EA(insn, OS_LONG, dest, &addr);
1847 } else {
1848 SRC_EA(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(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 = gen_im32(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 = lduw_code(s->pc);
1950 s->pc += 2;
1951 if (ext != 0x46FC) {
1952 gen_exception(s, addr, EXCP_UNSUPPORTED);
1953 return;
1954 }
1955 ext = lduw_code(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(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 = lduw_code(s->pc);
2024 s->pc += 2;
2025
2026 gen_set_sr_im(s, ext, 0);
2027 tcg_gen_movi_i32(QREG_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 = lduw_code(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 if (IS_USER(s)) {
2088 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2089 return;
2090 }
2091 /* TODO: Implement wdebug. */
2092 qemu_assert(0, "WDEBUG not implemented");
2093 }
2094
2095 DISAS_INSN(trap)
2096 {
2097 gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));
2098 }
2099
2100 /* ??? FP exceptions are not implemented. Most exceptions are deferred until
2101 immediately before the next FP instruction is executed. */
2102 DISAS_INSN(fpu)
2103 {
2104 uint16_t ext;
2105 int32_t offset;
2106 int opmode;
2107 TCGv_i64 src;
2108 TCGv_i64 dest;
2109 TCGv_i64 res;
2110 TCGv tmp32;
2111 int round;
2112 int set_dest;
2113 int opsize;
2114
2115 ext = lduw_code(s->pc);
2116 s->pc += 2;
2117 opmode = ext & 0x7f;
2118 switch ((ext >> 13) & 7) {
2119 case 0: case 2:
2120 break;
2121 case 1:
2122 goto undef;
2123 case 3: /* fmove out */
2124 src = FREG(ext, 7);
2125 tmp32 = tcg_temp_new_i32();
2126 /* fmove */
2127 /* ??? TODO: Proper behavior on overflow. */
2128 switch ((ext >> 10) & 7) {
2129 case 0:
2130 opsize = OS_LONG;
2131 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2132 break;
2133 case 1:
2134 opsize = OS_SINGLE;
2135 gen_helper_f64_to_f32(tmp32, cpu_env, src);
2136 break;
2137 case 4:
2138 opsize = OS_WORD;
2139 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2140 break;
2141 case 5: /* OS_DOUBLE */
2142 tcg_gen_mov_i32(tmp32, AREG(insn, 0));
2143 switch ((insn >> 3) & 7) {
2144 case 2:
2145 case 3:
2146 break;
2147 case 4:
2148 tcg_gen_addi_i32(tmp32, tmp32, -8);
2149 break;
2150 case 5:
2151 offset = ldsw_code(s->pc);
2152 s->pc += 2;
2153 tcg_gen_addi_i32(tmp32, tmp32, offset);
2154 break;
2155 default:
2156 goto undef;
2157 }
2158 gen_store64(s, tmp32, src);
2159 switch ((insn >> 3) & 7) {
2160 case 3:
2161 tcg_gen_addi_i32(tmp32, tmp32, 8);
2162 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2163 break;
2164 case 4:
2165 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2166 break;
2167 }
2168 tcg_temp_free_i32(tmp32);
2169 return;
2170 case 6:
2171 opsize = OS_BYTE;
2172 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2173 break;
2174 default:
2175 goto undef;
2176 }
2177 DEST_EA(insn, opsize, tmp32, NULL);
2178 tcg_temp_free_i32(tmp32);
2179 return;
2180 case 4: /* fmove to control register. */
2181 switch ((ext >> 10) & 7) {
2182 case 4: /* FPCR */
2183 /* Not implemented. Ignore writes. */
2184 break;
2185 case 1: /* FPIAR */
2186 case 2: /* FPSR */
2187 default:
2188 cpu_abort(NULL, "Unimplemented: fmove to control %d",
2189 (ext >> 10) & 7);
2190 }
2191 break;
2192 case 5: /* fmove from control register. */
2193 switch ((ext >> 10) & 7) {
2194 case 4: /* FPCR */
2195 /* Not implemented. Always return zero. */
2196 tmp32 = gen_im32(0);
2197 break;
2198 case 1: /* FPIAR */
2199 case 2: /* FPSR */
2200 default:
2201 cpu_abort(NULL, "Unimplemented: fmove from control %d",
2202 (ext >> 10) & 7);
2203 goto undef;
2204 }
2205 DEST_EA(insn, OS_LONG, tmp32, NULL);
2206 break;
2207 case 6: /* fmovem */
2208 case 7:
2209 {
2210 TCGv addr;
2211 uint16_t mask;
2212 int i;
2213 if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0)
2214 goto undef;
2215 tmp32 = gen_lea(s, insn, OS_LONG);
2216 if (IS_NULL_QREG(tmp32)) {
2217 gen_addr_fault(s);
2218 return;
2219 }
2220 addr = tcg_temp_new_i32();
2221 tcg_gen_mov_i32(addr, tmp32);
2222 mask = 0x80;
2223 for (i = 0; i < 8; i++) {
2224 if (ext & mask) {
2225 s->is_mem = 1;
2226 dest = FREG(i, 0);
2227 if (ext & (1 << 13)) {
2228 /* store */
2229 tcg_gen_qemu_stf64(dest, addr, IS_USER(s));
2230 } else {
2231 /* load */
2232 tcg_gen_qemu_ldf64(dest, addr, IS_USER(s));
2233 }
2234 if (ext & (mask - 1))
2235 tcg_gen_addi_i32(addr, addr, 8);
2236 }
2237 mask >>= 1;
2238 }
2239 tcg_temp_free_i32(addr);
2240 }
2241 return;
2242 }
2243 if (ext & (1 << 14)) {
2244 /* Source effective address. */
2245 switch ((ext >> 10) & 7) {
2246 case 0: opsize = OS_LONG; break;
2247 case 1: opsize = OS_SINGLE; break;
2248 case 4: opsize = OS_WORD; break;
2249 case 5: opsize = OS_DOUBLE; break;
2250 case 6: opsize = OS_BYTE; break;
2251 default:
2252 goto undef;
2253 }
2254 if (opsize == OS_DOUBLE) {
2255 tmp32 = tcg_temp_new_i32();
2256 tcg_gen_mov_i32(tmp32, AREG(insn, 0));
2257 switch ((insn >> 3) & 7) {
2258 case 2:
2259 case 3:
2260 break;
2261 case 4:
2262 tcg_gen_addi_i32(tmp32, tmp32, -8);
2263 break;
2264 case 5:
2265 offset = ldsw_code(s->pc);
2266 s->pc += 2;
2267 tcg_gen_addi_i32(tmp32, tmp32, offset);
2268 break;
2269 case 7:
2270 offset = ldsw_code(s->pc);
2271 offset += s->pc - 2;
2272 s->pc += 2;
2273 tcg_gen_addi_i32(tmp32, tmp32, offset);
2274 break;
2275 default:
2276 goto undef;
2277 }
2278 src = gen_load64(s, tmp32);
2279 switch ((insn >> 3) & 7) {
2280 case 3:
2281 tcg_gen_addi_i32(tmp32, tmp32, 8);
2282 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2283 break;
2284 case 4:
2285 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2286 break;
2287 }
2288 tcg_temp_free_i32(tmp32);
2289 } else {
2290 SRC_EA(tmp32, opsize, 1, NULL);
2291 src = tcg_temp_new_i64();
2292 switch (opsize) {
2293 case OS_LONG:
2294 case OS_WORD:
2295 case OS_BYTE:
2296 gen_helper_i32_to_f64(src, cpu_env, tmp32);
2297 break;
2298 case OS_SINGLE:
2299 gen_helper_f32_to_f64(src, cpu_env, tmp32);
2300 break;
2301 }
2302 }
2303 } else {
2304 /* Source register. */
2305 src = FREG(ext, 10);
2306 }
2307 dest = FREG(ext, 7);
2308 res = tcg_temp_new_i64();
2309 if (opmode != 0x3a)
2310 tcg_gen_mov_f64(res, dest);
2311 round = 1;
2312 set_dest = 1;
2313 switch (opmode) {
2314 case 0: case 0x40: case 0x44: /* fmove */
2315 tcg_gen_mov_f64(res, src);
2316 break;
2317 case 1: /* fint */
2318 gen_helper_iround_f64(res, cpu_env, src);
2319 round = 0;
2320 break;
2321 case 3: /* fintrz */
2322 gen_helper_itrunc_f64(res, cpu_env, src);
2323 round = 0;
2324 break;
2325 case 4: case 0x41: case 0x45: /* fsqrt */
2326 gen_helper_sqrt_f64(res, cpu_env, src);
2327 break;
2328 case 0x18: case 0x58: case 0x5c: /* fabs */
2329 gen_helper_abs_f64(res, src);
2330 break;
2331 case 0x1a: case 0x5a: case 0x5e: /* fneg */
2332 gen_helper_chs_f64(res, src);
2333 break;
2334 case 0x20: case 0x60: case 0x64: /* fdiv */
2335 gen_helper_div_f64(res, cpu_env, res, src);
2336 break;
2337 case 0x22: case 0x62: case 0x66: /* fadd */
2338 gen_helper_add_f64(res, cpu_env, res, src);
2339 break;
2340 case 0x23: case 0x63: case 0x67: /* fmul */
2341 gen_helper_mul_f64(res, cpu_env, res, src);
2342 break;
2343 case 0x28: case 0x68: case 0x6c: /* fsub */
2344 gen_helper_sub_f64(res, cpu_env, res, src);
2345 break;
2346 case 0x38: /* fcmp */
2347 gen_helper_sub_cmp_f64(res, cpu_env, res, src);
2348 set_dest = 0;
2349 round = 0;
2350 break;
2351 case 0x3a: /* ftst */
2352 tcg_gen_mov_f64(res, src);
2353 set_dest = 0;
2354 round = 0;
2355 break;
2356 default:
2357 goto undef;
2358 }
2359 if (ext & (1 << 14)) {
2360 tcg_temp_free_i64(src);
2361 }
2362 if (round) {
2363 if (opmode & 0x40) {
2364 if ((opmode & 0x4) != 0)
2365 round = 0;
2366 } else if ((s->fpcr & M68K_FPCR_PREC) == 0) {
2367 round = 0;
2368 }
2369 }
2370 if (round) {
2371 TCGv tmp = tcg_temp_new_i32();
2372 gen_helper_f64_to_f32(tmp, cpu_env, res);
2373 gen_helper_f32_to_f64(res, cpu_env, tmp);
2374 tcg_temp_free_i32(tmp);
2375 }
2376 tcg_gen_mov_f64(QREG_FP_RESULT, res);
2377 if (set_dest) {
2378 tcg_gen_mov_f64(dest, res);
2379 }
2380 tcg_temp_free_i64(res);
2381 return;
2382 undef:
2383 /* FIXME: Is this right for offset addressing modes? */
2384 s->pc -= 2;
2385 disas_undef_fpu(s, insn);
2386 }
2387
2388 DISAS_INSN(fbcc)
2389 {
2390 uint32_t offset;
2391 uint32_t addr;
2392 TCGv flag;
2393 int l1;
2394
2395 addr = s->pc;
2396 offset = ldsw_code(s->pc);
2397 s->pc += 2;
2398 if (insn & (1 << 6)) {
2399 offset = (offset << 16) | lduw_code(s->pc);
2400 s->pc += 2;
2401 }
2402
2403 l1 = gen_new_label();
2404 /* TODO: Raise BSUN exception. */
2405 flag = tcg_temp_new();
2406 gen_helper_compare_f64(flag, cpu_env, QREG_FP_RESULT);
2407 /* Jump to l1 if condition is true. */
2408 switch (insn & 0xf) {
2409 case 0: /* f */
2410 break;
2411 case 1: /* eq (=0) */
2412 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
2413 break;
2414 case 2: /* ogt (=1) */
2415 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(1), l1);
2416 break;
2417 case 3: /* oge (=0 or =1) */
2418 tcg_gen_brcond_i32(TCG_COND_LEU, flag, tcg_const_i32(1), l1);
2419 break;
2420 case 4: /* olt (=-1) */
2421 tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(0), l1);
2422 break;
2423 case 5: /* ole (=-1 or =0) */
2424 tcg_gen_brcond_i32(TCG_COND_LE, flag, tcg_const_i32(0), l1);
2425 break;
2426 case 6: /* ogl (=-1 or =1) */
2427 tcg_gen_andi_i32(flag, flag, 1);
2428 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
2429 break;
2430 case 7: /* or (=2) */
2431 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(2), l1);
2432 break;
2433 case 8: /* un (<2) */
2434 tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(2), l1);
2435 break;
2436 case 9: /* ueq (=0 or =2) */
2437 tcg_gen_andi_i32(flag, flag, 1);
2438 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
2439 break;
2440 case 10: /* ugt (>0) */
2441 tcg_gen_brcond_i32(TCG_COND_GT, flag, tcg_const_i32(0), l1);
2442 break;
2443 case 11: /* uge (>=0) */
2444 tcg_gen_brcond_i32(TCG_COND_GE, flag, tcg_const_i32(0), l1);
2445 break;
2446 case 12: /* ult (=-1 or =2) */
2447 tcg_gen_brcond_i32(TCG_COND_GEU, flag, tcg_const_i32(2), l1);
2448 break;
2449 case 13: /* ule (!=1) */
2450 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(1), l1);
2451 break;
2452 case 14: /* ne (!=0) */
2453 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
2454 break;
2455 case 15: /* t */
2456 tcg_gen_br(l1);
2457 break;
2458 }
2459 gen_jmp_tb(s, 0, s->pc);
2460 gen_set_label(l1);
2461 gen_jmp_tb(s, 1, addr + offset);
2462 }
2463
2464 DISAS_INSN(frestore)
2465 {
2466 /* TODO: Implement frestore. */
2467 qemu_assert(0, "FRESTORE not implemented");
2468 }
2469
2470 DISAS_INSN(fsave)
2471 {
2472 /* TODO: Implement fsave. */
2473 qemu_assert(0, "FSAVE not implemented");
2474 }
2475
2476 static inline TCGv gen_mac_extract_word(DisasContext *s, TCGv val, int upper)
2477 {
2478 TCGv tmp = tcg_temp_new();
2479 if (s->env->macsr & MACSR_FI) {
2480 if (upper)
2481 tcg_gen_andi_i32(tmp, val, 0xffff0000);
2482 else
2483 tcg_gen_shli_i32(tmp, val, 16);
2484 } else if (s->env->macsr & MACSR_SU) {
2485 if (upper)
2486 tcg_gen_sari_i32(tmp, val, 16);
2487 else
2488 tcg_gen_ext16s_i32(tmp, val);
2489 } else {
2490 if (upper)
2491 tcg_gen_shri_i32(tmp, val, 16);
2492 else
2493 tcg_gen_ext16u_i32(tmp, val);
2494 }
2495 return tmp;
2496 }
2497
2498 static void gen_mac_clear_flags(void)
2499 {
2500 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR,
2501 ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV));
2502 }
2503
2504 DISAS_INSN(mac)
2505 {
2506 TCGv rx;
2507 TCGv ry;
2508 uint16_t ext;
2509 int acc;
2510 TCGv tmp;
2511 TCGv addr;
2512 TCGv loadval;
2513 int dual;
2514 TCGv saved_flags;
2515
2516 if (!s->done_mac) {
2517 s->mactmp = tcg_temp_new_i64();
2518 s->done_mac = 1;
2519 }
2520
2521 ext = lduw_code(s->pc);
2522 s->pc += 2;
2523
2524 acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
2525 dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
2526 if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) {
2527 disas_undef(s, insn);
2528 return;
2529 }
2530 if (insn & 0x30) {
2531 /* MAC with load. */
2532 tmp = gen_lea(s, insn, OS_LONG);
2533 addr = tcg_temp_new();
2534 tcg_gen_and_i32(addr, tmp, QREG_MAC_MASK);
2535 /* Load the value now to ensure correct exception behavior.
2536 Perform writeback after reading the MAC inputs. */
2537 loadval = gen_load(s, OS_LONG, addr, 0);
2538
2539 acc ^= 1;
2540 rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
2541 ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
2542 } else {
2543 loadval = addr = NULL_QREG;
2544 rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2545 ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2546 }
2547
2548 gen_mac_clear_flags();
2549 #if 0
2550 l1 = -1;
2551 /* Disabled because conditional branches clobber temporary vars. */
2552 if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
2553 /* Skip the multiply if we know we will ignore it. */
2554 l1 = gen_new_label();
2555 tmp = tcg_temp_new();
2556 tcg_gen_andi_i32(tmp, QREG_MACSR, 1 << (acc + 8));
2557 gen_op_jmp_nz32(tmp, l1);
2558 }
2559 #endif
2560
2561 if ((ext & 0x0800) == 0) {
2562 /* Word. */
2563 rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
2564 ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
2565 }
2566 if (s->env->macsr & MACSR_FI) {
2567 gen_helper_macmulf(s->mactmp, cpu_env, rx, ry);
2568 } else {
2569 if (s->env->macsr & MACSR_SU)
2570 gen_helper_macmuls(s->mactmp, cpu_env, rx, ry);
2571 else
2572 gen_helper_macmulu(s->mactmp, cpu_env, rx, ry);
2573 switch ((ext >> 9) & 3) {
2574 case 1:
2575 tcg_gen_shli_i64(s->mactmp, s->mactmp, 1);
2576 break;
2577 case 3:
2578 tcg_gen_shri_i64(s->mactmp, s->mactmp, 1);
2579 break;
2580 }
2581 }
2582
2583 if (dual) {
2584 /* Save the overflow flag from the multiply. */
2585 saved_flags = tcg_temp_new();
2586 tcg_gen_mov_i32(saved_flags, QREG_MACSR);
2587 } else {
2588 saved_flags = NULL_QREG;
2589 }
2590
2591 #if 0
2592 /* Disabled because conditional branches clobber temporary vars. */
2593 if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
2594 /* Skip the accumulate if the value is already saturated. */
2595 l1 = gen_new_label();
2596 tmp = tcg_temp_new();
2597 gen_op_and32(tmp, QREG_MACSR, gen_im32(MACSR_PAV0 << acc));
2598 gen_op_jmp_nz32(tmp, l1);
2599 }
2600 #endif
2601
2602 if (insn & 0x100)
2603 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
2604 else
2605 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
2606
2607 if (s->env->macsr & MACSR_FI)
2608 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
2609 else if (s->env->macsr & MACSR_SU)
2610 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
2611 else
2612 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
2613
2614 #if 0
2615 /* Disabled because conditional branches clobber temporary vars. */
2616 if (l1 != -1)
2617 gen_set_label(l1);
2618 #endif
2619
2620 if (dual) {
2621 /* Dual accumulate variant. */
2622 acc = (ext >> 2) & 3;
2623 /* Restore the overflow flag from the multiplier. */
2624 tcg_gen_mov_i32(QREG_MACSR, saved_flags);
2625 #if 0
2626 /* Disabled because conditional branches clobber temporary vars. */
2627 if ((s->env->macsr & MACSR_OMC) != 0) {
2628 /* Skip the accumulate if the value is already saturated. */
2629 l1 = gen_new_label();
2630 tmp = tcg_temp_new();
2631 gen_op_and32(tmp, QREG_MACSR, gen_im32(MACSR_PAV0 << acc));
2632 gen_op_jmp_nz32(tmp, l1);
2633 }
2634 #endif
2635 if (ext & 2)
2636 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
2637 else
2638 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
2639 if (s->env->macsr & MACSR_FI)
2640 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
2641 else if (s->env->macsr & MACSR_SU)
2642 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
2643 else
2644 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
2645 #if 0
2646 /* Disabled because conditional branches clobber temporary vars. */
2647 if (l1 != -1)
2648 gen_set_label(l1);
2649 #endif
2650 }
2651 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(acc));
2652
2653 if (insn & 0x30) {
2654 TCGv rw;
2655 rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2656 tcg_gen_mov_i32(rw, loadval);
2657 /* FIXME: Should address writeback happen with the masked or
2658 unmasked value? */
2659 switch ((insn >> 3) & 7) {
2660 case 3: /* Post-increment. */
2661 tcg_gen_addi_i32(AREG(insn, 0), addr, 4);
2662 break;
2663 case 4: /* Pre-decrement. */
2664 tcg_gen_mov_i32(AREG(insn, 0), addr);
2665 }
2666 }
2667 }
2668
2669 DISAS_INSN(from_mac)
2670 {
2671 TCGv rx;
2672 TCGv_i64 acc;
2673 int accnum;
2674
2675 rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2676 accnum = (insn >> 9) & 3;
2677 acc = MACREG(accnum);
2678 if (s->env->macsr & MACSR_FI) {
2679 gen_helper_get_macf(rx, cpu_env, acc);
2680 } else if ((s->env->macsr & MACSR_OMC) == 0) {
2681 tcg_gen_trunc_i64_i32(rx, acc);
2682 } else if (s->env->macsr & MACSR_SU) {
2683 gen_helper_get_macs(rx, acc);
2684 } else {
2685 gen_helper_get_macu(rx, acc);
2686 }
2687 if (insn & 0x40) {
2688 tcg_gen_movi_i64(acc, 0);
2689 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
2690 }
2691 }
2692
2693 DISAS_INSN(move_mac)
2694 {
2695 /* FIXME: This can be done without a helper. */
2696 int src;
2697 TCGv dest;
2698 src = insn & 3;
2699 dest = tcg_const_i32((insn >> 9) & 3);
2700 gen_helper_mac_move(cpu_env, dest, tcg_const_i32(src));
2701 gen_mac_clear_flags();
2702 gen_helper_mac_set_flags(cpu_env, dest);
2703 }
2704
2705 DISAS_INSN(from_macsr)
2706 {
2707 TCGv reg;
2708
2709 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2710 tcg_gen_mov_i32(reg, QREG_MACSR);
2711 }
2712
2713 DISAS_INSN(from_mask)
2714 {
2715 TCGv reg;
2716 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2717 tcg_gen_mov_i32(reg, QREG_MAC_MASK);
2718 }
2719
2720 DISAS_INSN(from_mext)
2721 {
2722 TCGv reg;
2723 TCGv acc;
2724 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2725 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
2726 if (s->env->macsr & MACSR_FI)
2727 gen_helper_get_mac_extf(reg, cpu_env, acc);
2728 else
2729 gen_helper_get_mac_exti(reg, cpu_env, acc);
2730 }
2731
2732 DISAS_INSN(macsr_to_ccr)
2733 {
2734 tcg_gen_movi_i32(QREG_CC_X, 0);
2735 tcg_gen_andi_i32(QREG_CC_DEST, QREG_MACSR, 0xf);
2736 s->cc_op = CC_OP_FLAGS;
2737 }
2738
2739 DISAS_INSN(to_mac)
2740 {
2741 TCGv_i64 acc;
2742 TCGv val;
2743 int accnum;
2744 accnum = (insn >> 9) & 3;
2745 acc = MACREG(accnum);
2746 SRC_EA(val, OS_LONG, 0, NULL);
2747 if (s->env->macsr & MACSR_FI) {
2748 tcg_gen_ext_i32_i64(acc, val);
2749 tcg_gen_shli_i64(acc, acc, 8);
2750 } else if (s->env->macsr & MACSR_SU) {
2751 tcg_gen_ext_i32_i64(acc, val);
2752 } else {
2753 tcg_gen_extu_i32_i64(acc, val);
2754 }
2755 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
2756 gen_mac_clear_flags();
2757 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(accnum));
2758 }
2759
2760 DISAS_INSN(to_macsr)
2761 {
2762 TCGv val;
2763 SRC_EA(val, OS_LONG, 0, NULL);
2764 gen_helper_set_macsr(cpu_env, val);
2765 gen_lookup_tb(s);
2766 }
2767
2768 DISAS_INSN(to_mask)
2769 {
2770 TCGv val;
2771 SRC_EA(val, OS_LONG, 0, NULL);
2772 tcg_gen_ori_i32(QREG_MAC_MASK, val, 0xffff0000);
2773 }
2774
2775 DISAS_INSN(to_mext)
2776 {
2777 TCGv val;
2778 TCGv acc;
2779 SRC_EA(val, OS_LONG, 0, NULL);
2780 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
2781 if (s->env->macsr & MACSR_FI)
2782 gen_helper_set_mac_extf(cpu_env, val, acc);
2783 else if (s->env->macsr & MACSR_SU)
2784 gen_helper_set_mac_exts(cpu_env, val, acc);
2785 else
2786 gen_helper_set_mac_extu(cpu_env, val, acc);
2787 }
2788
2789 static disas_proc opcode_table[65536];
2790
2791 static void
2792 register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
2793 {
2794 int i;
2795 int from;
2796 int to;
2797
2798 /* Sanity check. All set bits must be included in the mask. */
2799 if (opcode & ~mask) {
2800 fprintf(stderr,
2801 "qemu internal error: bogus opcode definition %04x/%04x\n",
2802 opcode, mask);
2803 abort();
2804 }
2805 /* This could probably be cleverer. For now just optimize the case where
2806 the top bits are known. */
2807 /* Find the first zero bit in the mask. */
2808 i = 0x8000;
2809 while ((i & mask) != 0)
2810 i >>= 1;
2811 /* Iterate over all combinations of this and lower bits. */
2812 if (i == 0)
2813 i = 1;
2814 else
2815 i <<= 1;
2816 from = opcode & ~(i - 1);
2817 to = from + i;
2818 for (i = from; i < to; i++) {
2819 if ((i & mask) == opcode)
2820 opcode_table[i] = proc;
2821 }
2822 }
2823
2824 /* Register m68k opcode handlers. Order is important.
2825 Later insn override earlier ones. */
2826 void register_m68k_insns (CPUM68KState *env)
2827 {
2828 #define INSN(name, opcode, mask, feature) do { \
2829 if (m68k_feature(env, M68K_FEATURE_##feature)) \
2830 register_opcode(disas_##name, 0x##opcode, 0x##mask); \
2831 } while(0)
2832 INSN(undef, 0000, 0000, CF_ISA_A);
2833 INSN(arith_im, 0080, fff8, CF_ISA_A);
2834 INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
2835 INSN(bitop_reg, 0100, f1c0, CF_ISA_A);
2836 INSN(bitop_reg, 0140, f1c0, CF_ISA_A);
2837 INSN(bitop_reg, 0180, f1c0, CF_ISA_A);
2838 INSN(bitop_reg, 01c0, f1c0, CF_ISA_A);
2839 INSN(arith_im, 0280, fff8, CF_ISA_A);
2840 INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
2841 INSN(arith_im, 0480, fff8, CF_ISA_A);
2842 INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
2843 INSN(arith_im, 0680, fff8, CF_ISA_A);
2844 INSN(bitop_im, 0800, ffc0, CF_ISA_A);
2845 INSN(bitop_im, 0840, ffc0, CF_ISA_A);
2846 INSN(bitop_im, 0880, ffc0, CF_ISA_A);
2847 INSN(bitop_im, 08c0, ffc0, CF_ISA_A);
2848 INSN(arith_im, 0a80, fff8, CF_ISA_A);
2849 INSN(arith_im, 0c00, ff38, CF_ISA_A);
2850 INSN(move, 1000, f000, CF_ISA_A);
2851 INSN(move, 2000, f000, CF_ISA_A);
2852 INSN(move, 3000, f000, CF_ISA_A);
2853 INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC);
2854 INSN(negx, 4080, fff8, CF_ISA_A);
2855 INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
2856 INSN(lea, 41c0, f1c0, CF_ISA_A);
2857 INSN(clr, 4200, ff00, CF_ISA_A);
2858 INSN(undef, 42c0, ffc0, CF_ISA_A);
2859 INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
2860 INSN(neg, 4480, fff8, CF_ISA_A);
2861 INSN(move_to_ccr, 44c0, ffc0, CF_ISA_A);
2862 INSN(not, 4680, fff8, CF_ISA_A);
2863 INSN(move_to_sr, 46c0, ffc0, CF_ISA_A);
2864 INSN(pea, 4840, ffc0, CF_ISA_A);
2865 INSN(swap, 4840, fff8, CF_ISA_A);
2866 INSN(movem, 48c0, fbc0, CF_ISA_A);
2867 INSN(ext, 4880, fff8, CF_ISA_A);
2868 INSN(ext, 48c0, fff8, CF_ISA_A);
2869 INSN(ext, 49c0, fff8, CF_ISA_A);
2870 INSN(tst, 4a00, ff00, CF_ISA_A);
2871 INSN(tas, 4ac0, ffc0, CF_ISA_B);
2872 INSN(halt, 4ac8, ffff, CF_ISA_A);
2873 INSN(pulse, 4acc, ffff, CF_ISA_A);
2874 INSN(illegal, 4afc, ffff, CF_ISA_A);
2875 INSN(mull, 4c00, ffc0, CF_ISA_A);
2876 INSN(divl, 4c40, ffc0, CF_ISA_A);
2877 INSN(sats, 4c80, fff8, CF_ISA_B);
2878 INSN(trap, 4e40, fff0, CF_ISA_A);
2879 INSN(link, 4e50, fff8, CF_ISA_A);
2880 INSN(unlk, 4e58, fff8, CF_ISA_A);
2881 INSN(move_to_usp, 4e60, fff8, USP);
2882 INSN(move_from_usp, 4e68, fff8, USP);
2883 INSN(nop, 4e71, ffff, CF_ISA_A);
2884 INSN(stop, 4e72, ffff, CF_ISA_A);
2885 INSN(rte, 4e73, ffff, CF_ISA_A);
2886 INSN(rts, 4e75, ffff, CF_ISA_A);
2887 INSN(movec, 4e7b, ffff, CF_ISA_A);
2888 INSN(jump, 4e80, ffc0, CF_ISA_A);
2889 INSN(jump, 4ec0, ffc0, CF_ISA_A);
2890 INSN(addsubq, 5180, f1c0, CF_ISA_A);
2891 INSN(scc, 50c0, f0f8, CF_ISA_A);
2892 INSN(addsubq, 5080, f1c0, CF_ISA_A);
2893 INSN(tpf, 51f8, fff8, CF_ISA_A);
2894
2895 /* Branch instructions. */
2896 INSN(branch, 6000, f000, CF_ISA_A);
2897 /* Disable long branch instructions, then add back the ones we want. */
2898 INSN(undef, 60ff, f0ff, CF_ISA_A); /* All long branches. */
2899 INSN(branch, 60ff, f0ff, CF_ISA_B);
2900 INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */
2901 INSN(branch, 60ff, ffff, BRAL);
2902
2903 INSN(moveq, 7000, f100, CF_ISA_A);
2904 INSN(mvzs, 7100, f100, CF_ISA_B);
2905 INSN(or, 8000, f000, CF_ISA_A);
2906 INSN(divw, 80c0, f0c0, CF_ISA_A);
2907 INSN(addsub, 9000, f000, CF_ISA_A);
2908 INSN(subx, 9180, f1f8, CF_ISA_A);
2909 INSN(suba, 91c0, f1c0, CF_ISA_A);
2910
2911 INSN(undef_mac, a000, f000, CF_ISA_A);
2912 INSN(mac, a000, f100, CF_EMAC);
2913 INSN(from_mac, a180, f9b0, CF_EMAC);
2914 INSN(move_mac, a110, f9fc, CF_EMAC);
2915 INSN(from_macsr,a980, f9f0, CF_EMAC);
2916 INSN(from_mask, ad80, fff0, CF_EMAC);
2917 INSN(from_mext, ab80, fbf0, CF_EMAC);
2918 INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
2919 INSN(to_mac, a100, f9c0, CF_EMAC);
2920 INSN(to_macsr, a900, ffc0, CF_EMAC);
2921 INSN(to_mext, ab00, fbc0, CF_EMAC);
2922 INSN(to_mask, ad00, ffc0, CF_EMAC);
2923
2924 INSN(mov3q, a140, f1c0, CF_ISA_B);
2925 INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
2926 INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
2927 INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
2928 INSN(cmp, b080, f1c0, CF_ISA_A);
2929 INSN(cmpa, b1c0, f1c0, CF_ISA_A);
2930 INSN(eor, b180, f1c0, CF_ISA_A);
2931 INSN(and, c000, f000, CF_ISA_A);
2932 INSN(mulw, c0c0, f0c0, CF_ISA_A);
2933 INSN(addsub, d000, f000, CF_ISA_A);
2934 INSN(addx, d180, f1f8, CF_ISA_A);
2935 INSN(adda, d1c0, f1c0, CF_ISA_A);
2936 INSN(shift_im, e080, f0f0, CF_ISA_A);
2937 INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
2938 INSN(undef_fpu, f000, f000, CF_ISA_A);
2939 INSN(fpu, f200, ffc0, CF_FPU);
2940 INSN(fbcc, f280, ffc0, CF_FPU);
2941 INSN(frestore, f340, ffc0, CF_FPU);
2942 INSN(fsave, f340, ffc0, CF_FPU);
2943 INSN(intouch, f340, ffc0, CF_ISA_A);
2944 INSN(cpushl, f428, ff38, CF_ISA_A);
2945 INSN(wddata, fb00, ff00, CF_ISA_A);
2946 INSN(wdebug, fbc0, ffc0, CF_ISA_A);
2947 #undef INSN
2948 }
2949
2950 /* ??? Some of this implementation is not exception safe. We should always
2951 write back the result to memory before setting the condition codes. */
2952 static void disas_m68k_insn(CPUState * env, DisasContext *s)
2953 {
2954 uint16_t insn;
2955
2956 insn = lduw_code(s->pc);
2957 s->pc += 2;
2958
2959 opcode_table[insn](s, insn);
2960 }
2961
2962 /* generate intermediate code for basic block 'tb'. */
2963 static inline void
2964 gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
2965 int search_pc)
2966 {
2967 DisasContext dc1, *dc = &dc1;
2968 uint16_t *gen_opc_end;
2969 CPUBreakpoint *bp;
2970 int j, lj;
2971 target_ulong pc_start;
2972 int pc_offset;
2973 int last_cc_op;
2974 int num_insns;
2975 int max_insns;
2976
2977 /* generate intermediate code */
2978 pc_start = tb->pc;
2979
2980 dc->tb = tb;
2981
2982 gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
2983
2984 dc->env = env;
2985 dc->is_jmp = DISAS_NEXT;
2986 dc->pc = pc_start;
2987 dc->cc_op = CC_OP_DYNAMIC;
2988 dc->singlestep_enabled = env->singlestep_enabled;
2989 dc->fpcr = env->fpcr;
2990 dc->user = (env->sr & SR_S) == 0;
2991 dc->is_mem = 0;
2992 dc->done_mac = 0;
2993 lj = -1;
2994 num_insns = 0;
2995 max_insns = tb->cflags & CF_COUNT_MASK;
2996 if (max_insns == 0)
2997 max_insns = CF_COUNT_MASK;
2998
2999 gen_icount_start();
3000 do {
3001 pc_offset = dc->pc - pc_start;
3002 gen_throws_exception = NULL;
3003 if (unlikely(!TAILQ_EMPTY(&env->breakpoints))) {
3004 TAILQ_FOREACH(bp, &env->breakpoints, entry) {
3005 if (bp->pc == dc->pc) {
3006 gen_exception(dc, dc->pc, EXCP_DEBUG);
3007 dc->is_jmp = DISAS_JUMP;
3008 break;
3009 }
3010 }
3011 if (dc->is_jmp)
3012 break;
3013 }
3014 if (search_pc) {
3015 j = gen_opc_ptr - gen_opc_buf;
3016 if (lj < j) {
3017 lj++;
3018 while (lj < j)
3019 gen_opc_instr_start[lj++] = 0;
3020 }
3021 gen_opc_pc[lj] = dc->pc;
3022 gen_opc_instr_start[lj] = 1;
3023 gen_opc_icount[lj] = num_insns;
3024 }
3025 if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
3026 gen_io_start();
3027 last_cc_op = dc->cc_op;
3028 dc->insn_pc = dc->pc;
3029 disas_m68k_insn(env, dc);
3030 num_insns++;
3031 } while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
3032 !env->singlestep_enabled &&
3033 !singlestep &&
3034 (pc_offset) < (TARGET_PAGE_SIZE - 32) &&
3035 num_insns < max_insns);
3036
3037 if (tb->cflags & CF_LAST_IO)
3038 gen_io_end();
3039 if (unlikely(env->singlestep_enabled)) {
3040 /* Make sure the pc is updated, and raise a debug exception. */
3041 if (!dc->is_jmp) {
3042 gen_flush_cc_op(dc);
3043 tcg_gen_movi_i32(QREG_PC, dc->pc);
3044 }
3045 gen_helper_raise_exception(tcg_const_i32(EXCP_DEBUG));
3046 } else {
3047 switch(dc->is_jmp) {
3048 case DISAS_NEXT:
3049 gen_flush_cc_op(dc);
3050 gen_jmp_tb(dc, 0, dc->pc);
3051 break;
3052 default:
3053 case DISAS_JUMP:
3054 case DISAS_UPDATE:
3055 gen_flush_cc_op(dc);
3056 /* indicate that the hash table must be used to find the next TB */
3057 tcg_gen_exit_tb(0);
3058 break;
3059 case DISAS_TB_JUMP:
3060 /* nothing more to generate */
3061 break;
3062 }
3063 }
3064 gen_icount_end(tb, num_insns);
3065 *gen_opc_ptr = INDEX_op_end;
3066
3067 #ifdef DEBUG_DISAS
3068 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
3069 qemu_log("----------------\n");
3070 qemu_log("IN: %s\n", lookup_symbol(pc_start));
3071 log_target_disas(pc_start, dc->pc - pc_start, 0);
3072 qemu_log("\n");
3073 }
3074 #endif
3075 if (search_pc) {
3076 j = gen_opc_ptr - gen_opc_buf;
3077 lj++;
3078 while (lj <= j)
3079 gen_opc_instr_start[lj++] = 0;
3080 } else {
3081 tb->size = dc->pc - pc_start;
3082 tb->icount = num_insns;
3083 }
3084
3085 //optimize_flags();
3086 //expand_target_qops();
3087 }
3088
3089 void gen_intermediate_code(CPUState *env, TranslationBlock *tb)
3090 {
3091 gen_intermediate_code_internal(env, tb, 0);
3092 }
3093
3094 void gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb)
3095 {
3096 gen_intermediate_code_internal(env, tb, 1);
3097 }
3098
3099 void cpu_dump_state(CPUState *env, FILE *f,
3100 int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
3101 int flags)
3102 {
3103 int i;
3104 uint16_t sr;
3105 CPU_DoubleU u;
3106 for (i = 0; i < 8; i++)
3107 {
3108 u.d = env->fregs[i];
3109 cpu_fprintf (f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n",
3110 i, env->dregs[i], i, env->aregs[i],
3111 i, u.l.upper, u.l.lower, *(double *)&u.d);
3112 }
3113 cpu_fprintf (f, "PC = %08x ", env->pc);
3114 sr = env->sr;
3115 cpu_fprintf (f, "SR = %04x %c%c%c%c%c ", sr, (sr & 0x10) ? 'X' : '-',
3116 (sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-',
3117 (sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-');
3118 cpu_fprintf (f, "FPRESULT = %12g\n", *(double *)&env->fp_result);
3119 }
3120
3121 void gen_pc_load(CPUState *env, TranslationBlock *tb,
3122 unsigned long searched_pc, int pc_pos, void *puc)
3123 {
3124 env->pc = gen_opc_pc[pc_pos];
3125 }
QEmu