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Avoid CPU endian memory accesses in devices
[qemu.git] / target-m68k / translate.c
blob0e7f1fe2c76e3979d4d067d2c04422997c7b2dbd
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 #include <stdarg.h>
21 #include <stdlib.h>
22 #include <stdio.h>
23 #include <string.h>
24 #include <inttypes.h>
25
26 #include "config.h"
27 #include "cpu.h"
28 #include "disas.h"
29 #include "tcg-op.h"
30 #include "qemu-log.h"
31
32 #include "helpers.h"
33 #define GEN_HELPER 1
34 #include "helpers.h"
35
36 //#define DEBUG_DISPATCH 1
37
38 /* Fake floating point. */
39 #define tcg_gen_mov_f64 tcg_gen_mov_i64
40 #define tcg_gen_qemu_ldf64 tcg_gen_qemu_ld64
41 #define tcg_gen_qemu_stf64 tcg_gen_qemu_st64
42
43 #define DEFO32(name, offset) static TCGv QREG_##name;
44 #define DEFO64(name, offset) static TCGv_i64 QREG_##name;
45 #define DEFF64(name, offset) static TCGv_i64 QREG_##name;
46 #include "qregs.def"
47 #undef DEFO32
48 #undef DEFO64
49 #undef DEFF64
50
51 static TCGv_ptr cpu_env;
52
53 static char cpu_reg_names[3*8*3 + 5*4];
54 static TCGv cpu_dregs[8];
55 static TCGv cpu_aregs[8];
56 static TCGv_i64 cpu_fregs[8];
57 static TCGv_i64 cpu_macc[4];
58
59 #define DREG(insn, pos) cpu_dregs[((insn) >> (pos)) & 7]
60 #define AREG(insn, pos) cpu_aregs[((insn) >> (pos)) & 7]
61 #define FREG(insn, pos) cpu_fregs[((insn) >> (pos)) & 7]
62 #define MACREG(acc) cpu_macc[acc]
63 #define QREG_SP cpu_aregs[7]
64
65 static TCGv NULL_QREG;
66 #define IS_NULL_QREG(t) (TCGV_EQUAL(t, NULL_QREG))
67 /* Used to distinguish stores from bad addressing modes. */
68 static TCGv store_dummy;
69
70 #include "gen-icount.h"
71
72 void m68k_tcg_init(void)
73 {
74 char *p;
75 int i;
76
77 #define DEFO32(name, offset) QREG_##name = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUState, offset), #name);
78 #define DEFO64(name, offset) QREG_##name = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUState, offset), #name);
79 #define DEFF64(name, offset) DEFO64(name, offset)
80 #include "qregs.def"
81 #undef DEFO32
82 #undef DEFO64
83 #undef DEFF64
84
85 cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
86
87 p = cpu_reg_names;
88 for (i = 0; i < 8; i++) {
89 sprintf(p, "D%d", i);
90 cpu_dregs[i] = tcg_global_mem_new(TCG_AREG0,
91 offsetof(CPUM68KState, dregs[i]), p);
92 p += 3;
93 sprintf(p, "A%d", i);
94 cpu_aregs[i] = tcg_global_mem_new(TCG_AREG0,
95 offsetof(CPUM68KState, aregs[i]), p);
96 p += 3;
97 sprintf(p, "F%d", i);
98 cpu_fregs[i] = tcg_global_mem_new_i64(TCG_AREG0,
99 offsetof(CPUM68KState, fregs[i]), p);
100 p += 3;
101 }
102 for (i = 0; i < 4; i++) {
103 sprintf(p, "ACC%d", i);
104 cpu_macc[i] = tcg_global_mem_new_i64(TCG_AREG0,
105 offsetof(CPUM68KState, macc[i]), p);
106 p += 5;
107 }
108
109 NULL_QREG = tcg_global_mem_new(TCG_AREG0, -4, "NULL");
110 store_dummy = tcg_global_mem_new(TCG_AREG0, -8, "NULL");
111
112 #define GEN_HELPER 2
113 #include "helpers.h"
114 }
115
116 static inline void qemu_assert(int cond, const char *msg)
117 {
118 if (!cond) {
119 fprintf (stderr, "badness: %s\n", msg);
120 abort();
121 }
122 }
123
124 /* internal defines */
125 typedef struct DisasContext {
126 CPUM68KState *env;
127 target_ulong insn_pc; /* Start of the current instruction. */
128 target_ulong pc;
129 int is_jmp;
130 int cc_op;
131 int user;
132 uint32_t fpcr;
133 struct TranslationBlock *tb;
134 int singlestep_enabled;
135 int is_mem;
136 TCGv_i64 mactmp;
137 int done_mac;
138 } DisasContext;
139
140 #define DISAS_JUMP_NEXT 4
141
142 #if defined(CONFIG_USER_ONLY)
143 #define IS_USER(s) 1
144 #else
145 #define IS_USER(s) s->user
146 #endif
147
148 /* XXX: move that elsewhere */
149 /* ??? Fix exceptions. */
150 static void *gen_throws_exception;
151 #define gen_last_qop NULL
152
153 #define OS_BYTE 0
154 #define OS_WORD 1
155 #define OS_LONG 2
156 #define OS_SINGLE 4
157 #define OS_DOUBLE 5
158
159 typedef void (*disas_proc)(DisasContext *, uint16_t);
160
161 #ifdef DEBUG_DISPATCH
162 #define DISAS_INSN(name) \
163 static void real_disas_##name (DisasContext *s, uint16_t insn); \
164 static void disas_##name (DisasContext *s, uint16_t insn) { \
165 qemu_log("Dispatch " #name "\n"); \
166 real_disas_##name(s, insn); } \
167 static void real_disas_##name (DisasContext *s, uint16_t insn)
168 #else
169 #define DISAS_INSN(name) \
170 static void disas_##name (DisasContext *s, 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 qemu_assert(0, "bad load size");
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 qemu_assert(0, "bad store size");
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(DisasContext *s)
267 {
268 uint32_t im;
269 im = ((uint32_t)lduw_code(s->pc)) << 16;
270 s->pc += 2;
271 im |= lduw_code(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(DisasContext *s, int opsize, TCGv base)
298 {
299 uint32_t offset;
300 uint16_t ext;
301 TCGv add;
302 TCGv tmp;
303 uint32_t bd, od;
304
305 offset = s->pc;
306 ext = lduw_code(s->pc);
307 s->pc += 2;
308
309 if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX))
310 return NULL_QREG;
311
312 if (ext & 0x100) {
313 /* full extension word format */
314 if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL))
315 return NULL_QREG;
316
317 if ((ext & 0x30) > 0x10) {
318 /* base displacement */
319 if ((ext & 0x30) == 0x20) {
320 bd = (int16_t)lduw_code(s->pc);
321 s->pc += 2;
322 } else {
323 bd = read_im32(s);
324 }
325 } else {
326 bd = 0;
327 }
328 tmp = tcg_temp_new();
329 if ((ext & 0x44) == 0) {
330 /* pre-index */
331 add = gen_addr_index(ext, tmp);
332 } else {
333 add = NULL_QREG;
334 }
335 if ((ext & 0x80) == 0) {
336 /* base not suppressed */
337 if (IS_NULL_QREG(base)) {
338 base = tcg_const_i32(offset + bd);
339 bd = 0;
340 }
341 if (!IS_NULL_QREG(add)) {
342 tcg_gen_add_i32(tmp, add, base);
343 add = tmp;
344 } else {
345 add = base;
346 }
347 }
348 if (!IS_NULL_QREG(add)) {
349 if (bd != 0) {
350 tcg_gen_addi_i32(tmp, add, bd);
351 add = tmp;
352 }
353 } else {
354 add = tcg_const_i32(bd);
355 }
356 if ((ext & 3) != 0) {
357 /* memory indirect */
358 base = gen_load(s, OS_LONG, add, 0);
359 if ((ext & 0x44) == 4) {
360 add = gen_addr_index(ext, tmp);
361 tcg_gen_add_i32(tmp, add, base);
362 add = tmp;
363 } else {
364 add = base;
365 }
366 if ((ext & 3) > 1) {
367 /* outer displacement */
368 if ((ext & 3) == 2) {
369 od = (int16_t)lduw_code(s->pc);
370 s->pc += 2;
371 } else {
372 od = read_im32(s);
373 }
374 } else {
375 od = 0;
376 }
377 if (od != 0) {
378 tcg_gen_addi_i32(tmp, add, od);
379 add = tmp;
380 }
381 }
382 } else {
383 /* brief extension word format */
384 tmp = tcg_temp_new();
385 add = gen_addr_index(ext, tmp);
386 if (!IS_NULL_QREG(base)) {
387 tcg_gen_add_i32(tmp, add, base);
388 if ((int8_t)ext)
389 tcg_gen_addi_i32(tmp, tmp, (int8_t)ext);
390 } else {
391 tcg_gen_addi_i32(tmp, add, offset + (int8_t)ext);
392 }
393 add = tmp;
394 }
395 return add;
396 }
397
398 /* Update the CPU env CC_OP state. */
399 static inline void gen_flush_cc_op(DisasContext *s)
400 {
401 if (s->cc_op != CC_OP_DYNAMIC)
402 tcg_gen_movi_i32(QREG_CC_OP, s->cc_op);
403 }
404
405 /* Evaluate all the CC flags. */
406 static inline void gen_flush_flags(DisasContext *s)
407 {
408 if (s->cc_op == CC_OP_FLAGS)
409 return;
410 gen_flush_cc_op(s);
411 gen_helper_flush_flags(cpu_env, QREG_CC_OP);
412 s->cc_op = CC_OP_FLAGS;
413 }
414
415 static void gen_logic_cc(DisasContext *s, TCGv val)
416 {
417 tcg_gen_mov_i32(QREG_CC_DEST, val);
418 s->cc_op = CC_OP_LOGIC;
419 }
420
421 static void gen_update_cc_add(TCGv dest, TCGv src)
422 {
423 tcg_gen_mov_i32(QREG_CC_DEST, dest);
424 tcg_gen_mov_i32(QREG_CC_SRC, src);
425 }
426
427 static inline int opsize_bytes(int opsize)
428 {
429 switch (opsize) {
430 case OS_BYTE: return 1;
431 case OS_WORD: return 2;
432 case OS_LONG: return 4;
433 case OS_SINGLE: return 4;
434 case OS_DOUBLE: return 8;
435 default:
436 qemu_assert(0, "bad operand size");
437 return 0;
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 qemu_assert(0, "Bad operand size");
465 break;
466 }
467 }
468
469 /* Sign or zero extend a value. */
470 static inline TCGv gen_extend(TCGv val, int opsize, int sign)
471 {
472 TCGv tmp;
473
474 switch (opsize) {
475 case OS_BYTE:
476 tmp = tcg_temp_new();
477 if (sign)
478 tcg_gen_ext8s_i32(tmp, val);
479 else
480 tcg_gen_ext8u_i32(tmp, val);
481 break;
482 case OS_WORD:
483 tmp = tcg_temp_new();
484 if (sign)
485 tcg_gen_ext16s_i32(tmp, val);
486 else
487 tcg_gen_ext16u_i32(tmp, val);
488 break;
489 case OS_LONG:
490 case OS_SINGLE:
491 tmp = val;
492 break;
493 default:
494 qemu_assert(0, "Bad operand size");
495 }
496 return tmp;
497 }
498
499 /* Generate code for an "effective address". Does not adjust the base
500 register for autoincrement addressing modes. */
501 static TCGv gen_lea(DisasContext *s, uint16_t insn, 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 = lduw_code(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(s, opsize, reg);
530 case 7: /* Other */
531 switch (insn & 7) {
532 case 0: /* Absolute short. */
533 offset = ldsw_code(s->pc);
534 s->pc += 2;
535 return tcg_const_i32(offset);
536 case 1: /* Absolute long. */
537 offset = read_im32(s);
538 return tcg_const_i32(offset);
539 case 2: /* pc displacement */
540 offset = s->pc;
541 offset += ldsw_code(s->pc);
542 s->pc += 2;
543 return tcg_const_i32(offset);
544 case 3: /* pc index+displacement. */
545 return gen_lea_indexed(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(DisasContext *s, uint16_t insn, int opsize,
558 TCGv val, TCGv *addrp, ea_what what)
559 {
560 TCGv tmp;
561
562 if (addrp && what == EA_STORE) {
563 tmp = *addrp;
564 } else {
565 tmp = gen_lea(s, insn, opsize);
566 if (IS_NULL_QREG(tmp))
567 return tmp;
568 if (addrp)
569 *addrp = tmp;
570 }
571 return gen_ldst(s, opsize, tmp, val, what);
572 }
573
574 /* Generate code to load/store a value ito/from an EA. If VAL > 0 this is
575 a write otherwise it is a read (0 == sign extend, -1 == zero extend).
576 ADDRP is non-null for readwrite operands. */
577 static TCGv gen_ea(DisasContext *s, uint16_t insn, int opsize, TCGv val,
578 TCGv *addrp, ea_what what)
579 {
580 TCGv reg;
581 TCGv result;
582 uint32_t offset;
583
584 switch ((insn >> 3) & 7) {
585 case 0: /* Data register direct. */
586 reg = DREG(insn, 0);
587 if (what == EA_STORE) {
588 gen_partset_reg(opsize, reg, val);
589 return store_dummy;
590 } else {
591 return gen_extend(reg, opsize, what == EA_LOADS);
592 }
593 case 1: /* Address register direct. */
594 reg = AREG(insn, 0);
595 if (what == EA_STORE) {
596 tcg_gen_mov_i32(reg, val);
597 return store_dummy;
598 } else {
599 return gen_extend(reg, opsize, what == EA_LOADS);
600 }
601 case 2: /* Indirect register */
602 reg = AREG(insn, 0);
603 return gen_ldst(s, opsize, reg, val, what);
604 case 3: /* Indirect postincrement. */
605 reg = AREG(insn, 0);
606 result = gen_ldst(s, opsize, reg, val, what);
607 /* ??? This is not exception safe. The instruction may still
608 fault after this point. */
609 if (what == EA_STORE || !addrp)
610 tcg_gen_addi_i32(reg, reg, opsize_bytes(opsize));
611 return result;
612 case 4: /* Indirect predecrememnt. */
613 {
614 TCGv tmp;
615 if (addrp && what == EA_STORE) {
616 tmp = *addrp;
617 } else {
618 tmp = gen_lea(s, insn, opsize);
619 if (IS_NULL_QREG(tmp))
620 return tmp;
621 if (addrp)
622 *addrp = tmp;
623 }
624 result = gen_ldst(s, opsize, tmp, val, what);
625 /* ??? This is not exception safe. The instruction may still
626 fault after this point. */
627 if (what == EA_STORE || !addrp) {
628 reg = AREG(insn, 0);
629 tcg_gen_mov_i32(reg, tmp);
630 }
631 }
632 return result;
633 case 5: /* Indirect displacement. */
634 case 6: /* Indirect index + displacement. */
635 return gen_ea_once(s, insn, opsize, val, addrp, what);
636 case 7: /* Other */
637 switch (insn & 7) {
638 case 0: /* Absolute short. */
639 case 1: /* Absolute long. */
640 case 2: /* pc displacement */
641 case 3: /* pc index+displacement. */
642 return gen_ea_once(s, insn, opsize, val, addrp, what);
643 case 4: /* Immediate. */
644 /* Sign extend values for consistency. */
645 switch (opsize) {
646 case OS_BYTE:
647 if (what == EA_LOADS)
648 offset = ldsb_code(s->pc + 1);
649 else
650 offset = ldub_code(s->pc + 1);
651 s->pc += 2;
652 break;
653 case OS_WORD:
654 if (what == EA_LOADS)
655 offset = ldsw_code(s->pc);
656 else
657 offset = lduw_code(s->pc);
658 s->pc += 2;
659 break;
660 case OS_LONG:
661 offset = read_im32(s);
662 break;
663 default:
664 qemu_assert(0, "Bad immediate operand");
665 }
666 return tcg_const_i32(offset);
667 default:
668 return NULL_QREG;
669 }
670 }
671 /* Should never happen. */
672 return NULL_QREG;
673 }
674
675 /* This generates a conditional branch, clobbering all temporaries. */
676 static void gen_jmpcc(DisasContext *s, int cond, int l1)
677 {
678 TCGv tmp;
679
680 /* TODO: Optimize compare/branch pairs rather than always flushing
681 flag state to CC_OP_FLAGS. */
682 gen_flush_flags(s);
683 switch (cond) {
684 case 0: /* T */
685 tcg_gen_br(l1);
686 break;
687 case 1: /* F */
688 break;
689 case 2: /* HI (!C && !Z) */
690 tmp = tcg_temp_new();
691 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z);
692 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
693 break;
694 case 3: /* LS (C || Z) */
695 tmp = tcg_temp_new();
696 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z);
697 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
698 break;
699 case 4: /* CC (!C) */
700 tmp = tcg_temp_new();
701 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C);
702 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
703 break;
704 case 5: /* CS (C) */
705 tmp = tcg_temp_new();
706 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C);
707 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
708 break;
709 case 6: /* NE (!Z) */
710 tmp = tcg_temp_new();
711 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z);
712 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
713 break;
714 case 7: /* EQ (Z) */
715 tmp = tcg_temp_new();
716 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z);
717 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
718 break;
719 case 8: /* VC (!V) */
720 tmp = tcg_temp_new();
721 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V);
722 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
723 break;
724 case 9: /* VS (V) */
725 tmp = tcg_temp_new();
726 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V);
727 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
728 break;
729 case 10: /* PL (!N) */
730 tmp = tcg_temp_new();
731 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
732 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
733 break;
734 case 11: /* MI (N) */
735 tmp = tcg_temp_new();
736 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
737 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
738 break;
739 case 12: /* GE (!(N ^ V)) */
740 tmp = tcg_temp_new();
741 assert(CCF_V == (CCF_N >> 2));
742 tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2);
743 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
744 tcg_gen_andi_i32(tmp, tmp, CCF_V);
745 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
746 break;
747 case 13: /* LT (N ^ V) */
748 tmp = tcg_temp_new();
749 assert(CCF_V == (CCF_N >> 2));
750 tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2);
751 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
752 tcg_gen_andi_i32(tmp, tmp, CCF_V);
753 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
754 break;
755 case 14: /* GT (!(Z || (N ^ V))) */
756 tmp = tcg_temp_new();
757 assert(CCF_V == (CCF_N >> 2));
758 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
759 tcg_gen_shri_i32(tmp, tmp, 2);
760 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
761 tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z);
762 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1);
763 break;
764 case 15: /* LE (Z || (N ^ V)) */
765 tmp = tcg_temp_new();
766 assert(CCF_V == (CCF_N >> 2));
767 tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N);
768 tcg_gen_shri_i32(tmp, tmp, 2);
769 tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST);
770 tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z);
771 tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1);
772 break;
773 default:
774 /* Should ever happen. */
775 abort();
776 }
777 }
778
779 DISAS_INSN(scc)
780 {
781 int l1;
782 int cond;
783 TCGv reg;
784
785 l1 = gen_new_label();
786 cond = (insn >> 8) & 0xf;
787 reg = DREG(insn, 0);
788 tcg_gen_andi_i32(reg, reg, 0xffffff00);
789 /* This is safe because we modify the reg directly, with no other values
790 live. */
791 gen_jmpcc(s, cond ^ 1, l1);
792 tcg_gen_ori_i32(reg, reg, 0xff);
793 gen_set_label(l1);
794 }
795
796 /* Force a TB lookup after an instruction that changes the CPU state. */
797 static void gen_lookup_tb(DisasContext *s)
798 {
799 gen_flush_cc_op(s);
800 tcg_gen_movi_i32(QREG_PC, s->pc);
801 s->is_jmp = DISAS_UPDATE;
802 }
803
804 /* Generate a jump to an immediate address. */
805 static void gen_jmp_im(DisasContext *s, uint32_t dest)
806 {
807 gen_flush_cc_op(s);
808 tcg_gen_movi_i32(QREG_PC, dest);
809 s->is_jmp = DISAS_JUMP;
810 }
811
812 /* Generate a jump to the address in qreg DEST. */
813 static void gen_jmp(DisasContext *s, TCGv dest)
814 {
815 gen_flush_cc_op(s);
816 tcg_gen_mov_i32(QREG_PC, dest);
817 s->is_jmp = DISAS_JUMP;
818 }
819
820 static void gen_exception(DisasContext *s, uint32_t where, int nr)
821 {
822 gen_flush_cc_op(s);
823 gen_jmp_im(s, where);
824 gen_helper_raise_exception(tcg_const_i32(nr));
825 }
826
827 static inline void gen_addr_fault(DisasContext *s)
828 {
829 gen_exception(s, s->insn_pc, EXCP_ADDRESS);
830 }
831
832 #define SRC_EA(result, opsize, op_sign, addrp) do { \
833 result = gen_ea(s, insn, opsize, NULL_QREG, addrp, op_sign ? EA_LOADS : EA_LOADU); \
834 if (IS_NULL_QREG(result)) { \
835 gen_addr_fault(s); \
836 return; \
837 } \
838 } while (0)
839
840 #define DEST_EA(insn, opsize, val, addrp) do { \
841 TCGv ea_result = gen_ea(s, insn, opsize, val, addrp, EA_STORE); \
842 if (IS_NULL_QREG(ea_result)) { \
843 gen_addr_fault(s); \
844 return; \
845 } \
846 } while (0)
847
848 /* Generate a jump to an immediate address. */
849 static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
850 {
851 TranslationBlock *tb;
852
853 tb = s->tb;
854 if (unlikely(s->singlestep_enabled)) {
855 gen_exception(s, dest, EXCP_DEBUG);
856 } else if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) ||
857 (s->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
858 tcg_gen_goto_tb(n);
859 tcg_gen_movi_i32(QREG_PC, dest);
860 tcg_gen_exit_tb((tcg_target_long)tb + n);
861 } else {
862 gen_jmp_im(s, dest);
863 tcg_gen_exit_tb(0);
864 }
865 s->is_jmp = DISAS_TB_JUMP;
866 }
867
868 DISAS_INSN(undef_mac)
869 {
870 gen_exception(s, s->pc - 2, EXCP_LINEA);
871 }
872
873 DISAS_INSN(undef_fpu)
874 {
875 gen_exception(s, s->pc - 2, EXCP_LINEF);
876 }
877
878 DISAS_INSN(undef)
879 {
880 gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
881 cpu_abort(cpu_single_env, "Illegal instruction: %04x @ %08x",
882 insn, s->pc - 2);
883 }
884
885 DISAS_INSN(mulw)
886 {
887 TCGv reg;
888 TCGv tmp;
889 TCGv src;
890 int sign;
891
892 sign = (insn & 0x100) != 0;
893 reg = DREG(insn, 9);
894 tmp = tcg_temp_new();
895 if (sign)
896 tcg_gen_ext16s_i32(tmp, reg);
897 else
898 tcg_gen_ext16u_i32(tmp, reg);
899 SRC_EA(src, OS_WORD, sign, NULL);
900 tcg_gen_mul_i32(tmp, tmp, src);
901 tcg_gen_mov_i32(reg, tmp);
902 /* Unlike m68k, coldfire always clears the overflow bit. */
903 gen_logic_cc(s, tmp);
904 }
905
906 DISAS_INSN(divw)
907 {
908 TCGv reg;
909 TCGv tmp;
910 TCGv src;
911 int sign;
912
913 sign = (insn & 0x100) != 0;
914 reg = DREG(insn, 9);
915 if (sign) {
916 tcg_gen_ext16s_i32(QREG_DIV1, reg);
917 } else {
918 tcg_gen_ext16u_i32(QREG_DIV1, reg);
919 }
920 SRC_EA(src, OS_WORD, sign, NULL);
921 tcg_gen_mov_i32(QREG_DIV2, src);
922 if (sign) {
923 gen_helper_divs(cpu_env, tcg_const_i32(1));
924 } else {
925 gen_helper_divu(cpu_env, tcg_const_i32(1));
926 }
927
928 tmp = tcg_temp_new();
929 src = tcg_temp_new();
930 tcg_gen_ext16u_i32(tmp, QREG_DIV1);
931 tcg_gen_shli_i32(src, QREG_DIV2, 16);
932 tcg_gen_or_i32(reg, tmp, src);
933 s->cc_op = CC_OP_FLAGS;
934 }
935
936 DISAS_INSN(divl)
937 {
938 TCGv num;
939 TCGv den;
940 TCGv reg;
941 uint16_t ext;
942
943 ext = lduw_code(s->pc);
944 s->pc += 2;
945 if (ext & 0x87f8) {
946 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
947 return;
948 }
949 num = DREG(ext, 12);
950 reg = DREG(ext, 0);
951 tcg_gen_mov_i32(QREG_DIV1, num);
952 SRC_EA(den, OS_LONG, 0, NULL);
953 tcg_gen_mov_i32(QREG_DIV2, den);
954 if (ext & 0x0800) {
955 gen_helper_divs(cpu_env, tcg_const_i32(0));
956 } else {
957 gen_helper_divu(cpu_env, tcg_const_i32(0));
958 }
959 if ((ext & 7) == ((ext >> 12) & 7)) {
960 /* div */
961 tcg_gen_mov_i32 (reg, QREG_DIV1);
962 } else {
963 /* rem */
964 tcg_gen_mov_i32 (reg, QREG_DIV2);
965 }
966 s->cc_op = CC_OP_FLAGS;
967 }
968
969 DISAS_INSN(addsub)
970 {
971 TCGv reg;
972 TCGv dest;
973 TCGv src;
974 TCGv tmp;
975 TCGv addr;
976 int add;
977
978 add = (insn & 0x4000) != 0;
979 reg = DREG(insn, 9);
980 dest = tcg_temp_new();
981 if (insn & 0x100) {
982 SRC_EA(tmp, OS_LONG, 0, &addr);
983 src = reg;
984 } else {
985 tmp = reg;
986 SRC_EA(src, OS_LONG, 0, NULL);
987 }
988 if (add) {
989 tcg_gen_add_i32(dest, tmp, src);
990 gen_helper_xflag_lt(QREG_CC_X, dest, src);
991 s->cc_op = CC_OP_ADD;
992 } else {
993 gen_helper_xflag_lt(QREG_CC_X, tmp, src);
994 tcg_gen_sub_i32(dest, tmp, src);
995 s->cc_op = CC_OP_SUB;
996 }
997 gen_update_cc_add(dest, src);
998 if (insn & 0x100) {
999 DEST_EA(insn, OS_LONG, dest, &addr);
1000 } else {
1001 tcg_gen_mov_i32(reg, dest);
1002 }
1003 }
1004
1005
1006 /* Reverse the order of the bits in REG. */
1007 DISAS_INSN(bitrev)
1008 {
1009 TCGv reg;
1010 reg = DREG(insn, 0);
1011 gen_helper_bitrev(reg, reg);
1012 }
1013
1014 DISAS_INSN(bitop_reg)
1015 {
1016 int opsize;
1017 int op;
1018 TCGv src1;
1019 TCGv src2;
1020 TCGv tmp;
1021 TCGv addr;
1022 TCGv dest;
1023
1024 if ((insn & 0x38) != 0)
1025 opsize = OS_BYTE;
1026 else
1027 opsize = OS_LONG;
1028 op = (insn >> 6) & 3;
1029 SRC_EA(src1, opsize, 0, op ? &addr: NULL);
1030 src2 = DREG(insn, 9);
1031 dest = tcg_temp_new();
1032
1033 gen_flush_flags(s);
1034 tmp = tcg_temp_new();
1035 if (opsize == OS_BYTE)
1036 tcg_gen_andi_i32(tmp, src2, 7);
1037 else
1038 tcg_gen_andi_i32(tmp, src2, 31);
1039 src2 = tmp;
1040 tmp = tcg_temp_new();
1041 tcg_gen_shr_i32(tmp, src1, src2);
1042 tcg_gen_andi_i32(tmp, tmp, 1);
1043 tcg_gen_shli_i32(tmp, tmp, 2);
1044 /* Clear CCF_Z if bit set. */
1045 tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
1046 tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1047
1048 tcg_gen_shl_i32(tmp, tcg_const_i32(1), src2);
1049 switch (op) {
1050 case 1: /* bchg */
1051 tcg_gen_xor_i32(dest, src1, tmp);
1052 break;
1053 case 2: /* bclr */
1054 tcg_gen_not_i32(tmp, tmp);
1055 tcg_gen_and_i32(dest, src1, tmp);
1056 break;
1057 case 3: /* bset */
1058 tcg_gen_or_i32(dest, src1, tmp);
1059 break;
1060 default: /* btst */
1061 break;
1062 }
1063 if (op)
1064 DEST_EA(insn, opsize, dest, &addr);
1065 }
1066
1067 DISAS_INSN(sats)
1068 {
1069 TCGv reg;
1070 reg = DREG(insn, 0);
1071 gen_flush_flags(s);
1072 gen_helper_sats(reg, reg, QREG_CC_DEST);
1073 gen_logic_cc(s, reg);
1074 }
1075
1076 static void gen_push(DisasContext *s, TCGv val)
1077 {
1078 TCGv tmp;
1079
1080 tmp = tcg_temp_new();
1081 tcg_gen_subi_i32(tmp, QREG_SP, 4);
1082 gen_store(s, OS_LONG, tmp, val);
1083 tcg_gen_mov_i32(QREG_SP, tmp);
1084 }
1085
1086 DISAS_INSN(movem)
1087 {
1088 TCGv addr;
1089 int i;
1090 uint16_t mask;
1091 TCGv reg;
1092 TCGv tmp;
1093 int is_load;
1094
1095 mask = lduw_code(s->pc);
1096 s->pc += 2;
1097 tmp = gen_lea(s, insn, OS_LONG);
1098 if (IS_NULL_QREG(tmp)) {
1099 gen_addr_fault(s);
1100 return;
1101 }
1102 addr = tcg_temp_new();
1103 tcg_gen_mov_i32(addr, tmp);
1104 is_load = ((insn & 0x0400) != 0);
1105 for (i = 0; i < 16; i++, mask >>= 1) {
1106 if (mask & 1) {
1107 if (i < 8)
1108 reg = DREG(i, 0);
1109 else
1110 reg = AREG(i, 0);
1111 if (is_load) {
1112 tmp = gen_load(s, OS_LONG, addr, 0);
1113 tcg_gen_mov_i32(reg, tmp);
1114 } else {
1115 gen_store(s, OS_LONG, addr, reg);
1116 }
1117 if (mask != 1)
1118 tcg_gen_addi_i32(addr, addr, 4);
1119 }
1120 }
1121 }
1122
1123 DISAS_INSN(bitop_im)
1124 {
1125 int opsize;
1126 int op;
1127 TCGv src1;
1128 uint32_t mask;
1129 int bitnum;
1130 TCGv tmp;
1131 TCGv addr;
1132
1133 if ((insn & 0x38) != 0)
1134 opsize = OS_BYTE;
1135 else
1136 opsize = OS_LONG;
1137 op = (insn >> 6) & 3;
1138
1139 bitnum = lduw_code(s->pc);
1140 s->pc += 2;
1141 if (bitnum & 0xff00) {
1142 disas_undef(s, insn);
1143 return;
1144 }
1145
1146 SRC_EA(src1, opsize, 0, op ? &addr: NULL);
1147
1148 gen_flush_flags(s);
1149 if (opsize == OS_BYTE)
1150 bitnum &= 7;
1151 else
1152 bitnum &= 31;
1153 mask = 1 << bitnum;
1154
1155 tmp = tcg_temp_new();
1156 assert (CCF_Z == (1 << 2));
1157 if (bitnum > 2)
1158 tcg_gen_shri_i32(tmp, src1, bitnum - 2);
1159 else if (bitnum < 2)
1160 tcg_gen_shli_i32(tmp, src1, 2 - bitnum);
1161 else
1162 tcg_gen_mov_i32(tmp, src1);
1163 tcg_gen_andi_i32(tmp, tmp, CCF_Z);
1164 /* Clear CCF_Z if bit set. */
1165 tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z);
1166 tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1167 if (op) {
1168 switch (op) {
1169 case 1: /* bchg */
1170 tcg_gen_xori_i32(tmp, src1, mask);
1171 break;
1172 case 2: /* bclr */
1173 tcg_gen_andi_i32(tmp, src1, ~mask);
1174 break;
1175 case 3: /* bset */
1176 tcg_gen_ori_i32(tmp, src1, mask);
1177 break;
1178 default: /* btst */
1179 break;
1180 }
1181 DEST_EA(insn, opsize, tmp, &addr);
1182 }
1183 }
1184
1185 DISAS_INSN(arith_im)
1186 {
1187 int op;
1188 uint32_t im;
1189 TCGv src1;
1190 TCGv dest;
1191 TCGv addr;
1192
1193 op = (insn >> 9) & 7;
1194 SRC_EA(src1, OS_LONG, 0, (op == 6) ? NULL : &addr);
1195 im = read_im32(s);
1196 dest = tcg_temp_new();
1197 switch (op) {
1198 case 0: /* ori */
1199 tcg_gen_ori_i32(dest, src1, im);
1200 gen_logic_cc(s, dest);
1201 break;
1202 case 1: /* andi */
1203 tcg_gen_andi_i32(dest, src1, im);
1204 gen_logic_cc(s, dest);
1205 break;
1206 case 2: /* subi */
1207 tcg_gen_mov_i32(dest, src1);
1208 gen_helper_xflag_lt(QREG_CC_X, dest, tcg_const_i32(im));
1209 tcg_gen_subi_i32(dest, dest, im);
1210 gen_update_cc_add(dest, tcg_const_i32(im));
1211 s->cc_op = CC_OP_SUB;
1212 break;
1213 case 3: /* addi */
1214 tcg_gen_mov_i32(dest, src1);
1215 tcg_gen_addi_i32(dest, dest, im);
1216 gen_update_cc_add(dest, tcg_const_i32(im));
1217 gen_helper_xflag_lt(QREG_CC_X, dest, tcg_const_i32(im));
1218 s->cc_op = CC_OP_ADD;
1219 break;
1220 case 5: /* eori */
1221 tcg_gen_xori_i32(dest, src1, im);
1222 gen_logic_cc(s, dest);
1223 break;
1224 case 6: /* cmpi */
1225 tcg_gen_mov_i32(dest, src1);
1226 tcg_gen_subi_i32(dest, dest, im);
1227 gen_update_cc_add(dest, tcg_const_i32(im));
1228 s->cc_op = CC_OP_SUB;
1229 break;
1230 default:
1231 abort();
1232 }
1233 if (op != 6) {
1234 DEST_EA(insn, OS_LONG, dest, &addr);
1235 }
1236 }
1237
1238 DISAS_INSN(byterev)
1239 {
1240 TCGv reg;
1241
1242 reg = DREG(insn, 0);
1243 tcg_gen_bswap32_i32(reg, reg);
1244 }
1245
1246 DISAS_INSN(move)
1247 {
1248 TCGv src;
1249 TCGv dest;
1250 int op;
1251 int opsize;
1252
1253 switch (insn >> 12) {
1254 case 1: /* move.b */
1255 opsize = OS_BYTE;
1256 break;
1257 case 2: /* move.l */
1258 opsize = OS_LONG;
1259 break;
1260 case 3: /* move.w */
1261 opsize = OS_WORD;
1262 break;
1263 default:
1264 abort();
1265 }
1266 SRC_EA(src, opsize, 1, NULL);
1267 op = (insn >> 6) & 7;
1268 if (op == 1) {
1269 /* movea */
1270 /* The value will already have been sign extended. */
1271 dest = AREG(insn, 9);
1272 tcg_gen_mov_i32(dest, src);
1273 } else {
1274 /* normal move */
1275 uint16_t dest_ea;
1276 dest_ea = ((insn >> 9) & 7) | (op << 3);
1277 DEST_EA(dest_ea, opsize, src, NULL);
1278 /* This will be correct because loads sign extend. */
1279 gen_logic_cc(s, src);
1280 }
1281 }
1282
1283 DISAS_INSN(negx)
1284 {
1285 TCGv reg;
1286
1287 gen_flush_flags(s);
1288 reg = DREG(insn, 0);
1289 gen_helper_subx_cc(reg, cpu_env, tcg_const_i32(0), reg);
1290 }
1291
1292 DISAS_INSN(lea)
1293 {
1294 TCGv reg;
1295 TCGv tmp;
1296
1297 reg = AREG(insn, 9);
1298 tmp = gen_lea(s, insn, OS_LONG);
1299 if (IS_NULL_QREG(tmp)) {
1300 gen_addr_fault(s);
1301 return;
1302 }
1303 tcg_gen_mov_i32(reg, tmp);
1304 }
1305
1306 DISAS_INSN(clr)
1307 {
1308 int opsize;
1309
1310 switch ((insn >> 6) & 3) {
1311 case 0: /* clr.b */
1312 opsize = OS_BYTE;
1313 break;
1314 case 1: /* clr.w */
1315 opsize = OS_WORD;
1316 break;
1317 case 2: /* clr.l */
1318 opsize = OS_LONG;
1319 break;
1320 default:
1321 abort();
1322 }
1323 DEST_EA(insn, opsize, tcg_const_i32(0), NULL);
1324 gen_logic_cc(s, tcg_const_i32(0));
1325 }
1326
1327 static TCGv gen_get_ccr(DisasContext *s)
1328 {
1329 TCGv dest;
1330
1331 gen_flush_flags(s);
1332 dest = tcg_temp_new();
1333 tcg_gen_shli_i32(dest, QREG_CC_X, 4);
1334 tcg_gen_or_i32(dest, dest, QREG_CC_DEST);
1335 return dest;
1336 }
1337
1338 DISAS_INSN(move_from_ccr)
1339 {
1340 TCGv reg;
1341 TCGv ccr;
1342
1343 ccr = gen_get_ccr(s);
1344 reg = DREG(insn, 0);
1345 gen_partset_reg(OS_WORD, reg, ccr);
1346 }
1347
1348 DISAS_INSN(neg)
1349 {
1350 TCGv reg;
1351 TCGv src1;
1352
1353 reg = DREG(insn, 0);
1354 src1 = tcg_temp_new();
1355 tcg_gen_mov_i32(src1, reg);
1356 tcg_gen_neg_i32(reg, src1);
1357 s->cc_op = CC_OP_SUB;
1358 gen_update_cc_add(reg, src1);
1359 gen_helper_xflag_lt(QREG_CC_X, tcg_const_i32(0), src1);
1360 s->cc_op = CC_OP_SUB;
1361 }
1362
1363 static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
1364 {
1365 tcg_gen_movi_i32(QREG_CC_DEST, val & 0xf);
1366 tcg_gen_movi_i32(QREG_CC_X, (val & 0x10) >> 4);
1367 if (!ccr_only) {
1368 gen_helper_set_sr(cpu_env, tcg_const_i32(val & 0xff00));
1369 }
1370 }
1371
1372 static void gen_set_sr(DisasContext *s, uint16_t insn, int ccr_only)
1373 {
1374 TCGv tmp;
1375 TCGv reg;
1376
1377 s->cc_op = CC_OP_FLAGS;
1378 if ((insn & 0x38) == 0)
1379 {
1380 tmp = tcg_temp_new();
1381 reg = DREG(insn, 0);
1382 tcg_gen_andi_i32(QREG_CC_DEST, reg, 0xf);
1383 tcg_gen_shri_i32(tmp, reg, 4);
1384 tcg_gen_andi_i32(QREG_CC_X, tmp, 1);
1385 if (!ccr_only) {
1386 gen_helper_set_sr(cpu_env, reg);
1387 }
1388 }
1389 else if ((insn & 0x3f) == 0x3c)
1390 {
1391 uint16_t val;
1392 val = lduw_code(s->pc);
1393 s->pc += 2;
1394 gen_set_sr_im(s, val, ccr_only);
1395 }
1396 else
1397 disas_undef(s, insn);
1398 }
1399
1400 DISAS_INSN(move_to_ccr)
1401 {
1402 gen_set_sr(s, insn, 1);
1403 }
1404
1405 DISAS_INSN(not)
1406 {
1407 TCGv reg;
1408
1409 reg = DREG(insn, 0);
1410 tcg_gen_not_i32(reg, reg);
1411 gen_logic_cc(s, reg);
1412 }
1413
1414 DISAS_INSN(swap)
1415 {
1416 TCGv src1;
1417 TCGv src2;
1418 TCGv reg;
1419
1420 src1 = tcg_temp_new();
1421 src2 = tcg_temp_new();
1422 reg = DREG(insn, 0);
1423 tcg_gen_shli_i32(src1, reg, 16);
1424 tcg_gen_shri_i32(src2, reg, 16);
1425 tcg_gen_or_i32(reg, src1, src2);
1426 gen_logic_cc(s, reg);
1427 }
1428
1429 DISAS_INSN(pea)
1430 {
1431 TCGv tmp;
1432
1433 tmp = gen_lea(s, insn, OS_LONG);
1434 if (IS_NULL_QREG(tmp)) {
1435 gen_addr_fault(s);
1436 return;
1437 }
1438 gen_push(s, tmp);
1439 }
1440
1441 DISAS_INSN(ext)
1442 {
1443 int op;
1444 TCGv reg;
1445 TCGv tmp;
1446
1447 reg = DREG(insn, 0);
1448 op = (insn >> 6) & 7;
1449 tmp = tcg_temp_new();
1450 if (op == 3)
1451 tcg_gen_ext16s_i32(tmp, reg);
1452 else
1453 tcg_gen_ext8s_i32(tmp, reg);
1454 if (op == 2)
1455 gen_partset_reg(OS_WORD, reg, tmp);
1456 else
1457 tcg_gen_mov_i32(reg, tmp);
1458 gen_logic_cc(s, tmp);
1459 }
1460
1461 DISAS_INSN(tst)
1462 {
1463 int opsize;
1464 TCGv tmp;
1465
1466 switch ((insn >> 6) & 3) {
1467 case 0: /* tst.b */
1468 opsize = OS_BYTE;
1469 break;
1470 case 1: /* tst.w */
1471 opsize = OS_WORD;
1472 break;
1473 case 2: /* tst.l */
1474 opsize = OS_LONG;
1475 break;
1476 default:
1477 abort();
1478 }
1479 SRC_EA(tmp, opsize, 1, NULL);
1480 gen_logic_cc(s, tmp);
1481 }
1482
1483 DISAS_INSN(pulse)
1484 {
1485 /* Implemented as a NOP. */
1486 }
1487
1488 DISAS_INSN(illegal)
1489 {
1490 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
1491 }
1492
1493 /* ??? This should be atomic. */
1494 DISAS_INSN(tas)
1495 {
1496 TCGv dest;
1497 TCGv src1;
1498 TCGv addr;
1499
1500 dest = tcg_temp_new();
1501 SRC_EA(src1, OS_BYTE, 1, &addr);
1502 gen_logic_cc(s, src1);
1503 tcg_gen_ori_i32(dest, src1, 0x80);
1504 DEST_EA(insn, OS_BYTE, dest, &addr);
1505 }
1506
1507 DISAS_INSN(mull)
1508 {
1509 uint16_t ext;
1510 TCGv reg;
1511 TCGv src1;
1512 TCGv dest;
1513
1514 /* The upper 32 bits of the product are discarded, so
1515 muls.l and mulu.l are functionally equivalent. */
1516 ext = lduw_code(s->pc);
1517 s->pc += 2;
1518 if (ext & 0x87ff) {
1519 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
1520 return;
1521 }
1522 reg = DREG(ext, 12);
1523 SRC_EA(src1, OS_LONG, 0, NULL);
1524 dest = tcg_temp_new();
1525 tcg_gen_mul_i32(dest, src1, reg);
1526 tcg_gen_mov_i32(reg, dest);
1527 /* Unlike m68k, coldfire always clears the overflow bit. */
1528 gen_logic_cc(s, dest);
1529 }
1530
1531 DISAS_INSN(link)
1532 {
1533 int16_t offset;
1534 TCGv reg;
1535 TCGv tmp;
1536
1537 offset = ldsw_code(s->pc);
1538 s->pc += 2;
1539 reg = AREG(insn, 0);
1540 tmp = tcg_temp_new();
1541 tcg_gen_subi_i32(tmp, QREG_SP, 4);
1542 gen_store(s, OS_LONG, tmp, reg);
1543 if ((insn & 7) != 7)
1544 tcg_gen_mov_i32(reg, tmp);
1545 tcg_gen_addi_i32(QREG_SP, tmp, offset);
1546 }
1547
1548 DISAS_INSN(unlk)
1549 {
1550 TCGv src;
1551 TCGv reg;
1552 TCGv tmp;
1553
1554 src = tcg_temp_new();
1555 reg = AREG(insn, 0);
1556 tcg_gen_mov_i32(src, reg);
1557 tmp = gen_load(s, OS_LONG, src, 0);
1558 tcg_gen_mov_i32(reg, tmp);
1559 tcg_gen_addi_i32(QREG_SP, src, 4);
1560 }
1561
1562 DISAS_INSN(nop)
1563 {
1564 }
1565
1566 DISAS_INSN(rts)
1567 {
1568 TCGv tmp;
1569
1570 tmp = gen_load(s, OS_LONG, QREG_SP, 0);
1571 tcg_gen_addi_i32(QREG_SP, QREG_SP, 4);
1572 gen_jmp(s, tmp);
1573 }
1574
1575 DISAS_INSN(jump)
1576 {
1577 TCGv tmp;
1578
1579 /* Load the target address first to ensure correct exception
1580 behavior. */
1581 tmp = gen_lea(s, insn, OS_LONG);
1582 if (IS_NULL_QREG(tmp)) {
1583 gen_addr_fault(s);
1584 return;
1585 }
1586 if ((insn & 0x40) == 0) {
1587 /* jsr */
1588 gen_push(s, tcg_const_i32(s->pc));
1589 }
1590 gen_jmp(s, tmp);
1591 }
1592
1593 DISAS_INSN(addsubq)
1594 {
1595 TCGv src1;
1596 TCGv src2;
1597 TCGv dest;
1598 int val;
1599 TCGv addr;
1600
1601 SRC_EA(src1, OS_LONG, 0, &addr);
1602 val = (insn >> 9) & 7;
1603 if (val == 0)
1604 val = 8;
1605 dest = tcg_temp_new();
1606 tcg_gen_mov_i32(dest, src1);
1607 if ((insn & 0x38) == 0x08) {
1608 /* Don't update condition codes if the destination is an
1609 address register. */
1610 if (insn & 0x0100) {
1611 tcg_gen_subi_i32(dest, dest, val);
1612 } else {
1613 tcg_gen_addi_i32(dest, dest, val);
1614 }
1615 } else {
1616 src2 = tcg_const_i32(val);
1617 if (insn & 0x0100) {
1618 gen_helper_xflag_lt(QREG_CC_X, dest, src2);
1619 tcg_gen_subi_i32(dest, dest, val);
1620 s->cc_op = CC_OP_SUB;
1621 } else {
1622 tcg_gen_addi_i32(dest, dest, val);
1623 gen_helper_xflag_lt(QREG_CC_X, dest, src2);
1624 s->cc_op = CC_OP_ADD;
1625 }
1626 gen_update_cc_add(dest, src2);
1627 }
1628 DEST_EA(insn, OS_LONG, dest, &addr);
1629 }
1630
1631 DISAS_INSN(tpf)
1632 {
1633 switch (insn & 7) {
1634 case 2: /* One extension word. */
1635 s->pc += 2;
1636 break;
1637 case 3: /* Two extension words. */
1638 s->pc += 4;
1639 break;
1640 case 4: /* No extension words. */
1641 break;
1642 default:
1643 disas_undef(s, insn);
1644 }
1645 }
1646
1647 DISAS_INSN(branch)
1648 {
1649 int32_t offset;
1650 uint32_t base;
1651 int op;
1652 int l1;
1653
1654 base = s->pc;
1655 op = (insn >> 8) & 0xf;
1656 offset = (int8_t)insn;
1657 if (offset == 0) {
1658 offset = ldsw_code(s->pc);
1659 s->pc += 2;
1660 } else if (offset == -1) {
1661 offset = read_im32(s);
1662 }
1663 if (op == 1) {
1664 /* bsr */
1665 gen_push(s, tcg_const_i32(s->pc));
1666 }
1667 gen_flush_cc_op(s);
1668 if (op > 1) {
1669 /* Bcc */
1670 l1 = gen_new_label();
1671 gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
1672 gen_jmp_tb(s, 1, base + offset);
1673 gen_set_label(l1);
1674 gen_jmp_tb(s, 0, s->pc);
1675 } else {
1676 /* Unconditional branch. */
1677 gen_jmp_tb(s, 0, base + offset);
1678 }
1679 }
1680
1681 DISAS_INSN(moveq)
1682 {
1683 uint32_t val;
1684
1685 val = (int8_t)insn;
1686 tcg_gen_movi_i32(DREG(insn, 9), val);
1687 gen_logic_cc(s, tcg_const_i32(val));
1688 }
1689
1690 DISAS_INSN(mvzs)
1691 {
1692 int opsize;
1693 TCGv src;
1694 TCGv reg;
1695
1696 if (insn & 0x40)
1697 opsize = OS_WORD;
1698 else
1699 opsize = OS_BYTE;
1700 SRC_EA(src, opsize, (insn & 0x80) == 0, NULL);
1701 reg = DREG(insn, 9);
1702 tcg_gen_mov_i32(reg, src);
1703 gen_logic_cc(s, src);
1704 }
1705
1706 DISAS_INSN(or)
1707 {
1708 TCGv reg;
1709 TCGv dest;
1710 TCGv src;
1711 TCGv addr;
1712
1713 reg = DREG(insn, 9);
1714 dest = tcg_temp_new();
1715 if (insn & 0x100) {
1716 SRC_EA(src, OS_LONG, 0, &addr);
1717 tcg_gen_or_i32(dest, src, reg);
1718 DEST_EA(insn, OS_LONG, dest, &addr);
1719 } else {
1720 SRC_EA(src, OS_LONG, 0, NULL);
1721 tcg_gen_or_i32(dest, src, reg);
1722 tcg_gen_mov_i32(reg, dest);
1723 }
1724 gen_logic_cc(s, dest);
1725 }
1726
1727 DISAS_INSN(suba)
1728 {
1729 TCGv src;
1730 TCGv reg;
1731
1732 SRC_EA(src, OS_LONG, 0, NULL);
1733 reg = AREG(insn, 9);
1734 tcg_gen_sub_i32(reg, reg, src);
1735 }
1736
1737 DISAS_INSN(subx)
1738 {
1739 TCGv reg;
1740 TCGv src;
1741
1742 gen_flush_flags(s);
1743 reg = DREG(insn, 9);
1744 src = DREG(insn, 0);
1745 gen_helper_subx_cc(reg, cpu_env, reg, src);
1746 }
1747
1748 DISAS_INSN(mov3q)
1749 {
1750 TCGv src;
1751 int val;
1752
1753 val = (insn >> 9) & 7;
1754 if (val == 0)
1755 val = -1;
1756 src = tcg_const_i32(val);
1757 gen_logic_cc(s, src);
1758 DEST_EA(insn, OS_LONG, src, NULL);
1759 }
1760
1761 DISAS_INSN(cmp)
1762 {
1763 int op;
1764 TCGv src;
1765 TCGv reg;
1766 TCGv dest;
1767 int opsize;
1768
1769 op = (insn >> 6) & 3;
1770 switch (op) {
1771 case 0: /* cmp.b */
1772 opsize = OS_BYTE;
1773 s->cc_op = CC_OP_CMPB;
1774 break;
1775 case 1: /* cmp.w */
1776 opsize = OS_WORD;
1777 s->cc_op = CC_OP_CMPW;
1778 break;
1779 case 2: /* cmp.l */
1780 opsize = OS_LONG;
1781 s->cc_op = CC_OP_SUB;
1782 break;
1783 default:
1784 abort();
1785 }
1786 SRC_EA(src, opsize, 1, NULL);
1787 reg = DREG(insn, 9);
1788 dest = tcg_temp_new();
1789 tcg_gen_sub_i32(dest, reg, src);
1790 gen_update_cc_add(dest, src);
1791 }
1792
1793 DISAS_INSN(cmpa)
1794 {
1795 int opsize;
1796 TCGv src;
1797 TCGv reg;
1798 TCGv dest;
1799
1800 if (insn & 0x100) {
1801 opsize = OS_LONG;
1802 } else {
1803 opsize = OS_WORD;
1804 }
1805 SRC_EA(src, opsize, 1, NULL);
1806 reg = AREG(insn, 9);
1807 dest = tcg_temp_new();
1808 tcg_gen_sub_i32(dest, reg, src);
1809 gen_update_cc_add(dest, src);
1810 s->cc_op = CC_OP_SUB;
1811 }
1812
1813 DISAS_INSN(eor)
1814 {
1815 TCGv src;
1816 TCGv reg;
1817 TCGv dest;
1818 TCGv addr;
1819
1820 SRC_EA(src, OS_LONG, 0, &addr);
1821 reg = DREG(insn, 9);
1822 dest = tcg_temp_new();
1823 tcg_gen_xor_i32(dest, src, reg);
1824 gen_logic_cc(s, dest);
1825 DEST_EA(insn, OS_LONG, dest, &addr);
1826 }
1827
1828 DISAS_INSN(and)
1829 {
1830 TCGv src;
1831 TCGv reg;
1832 TCGv dest;
1833 TCGv addr;
1834
1835 reg = DREG(insn, 9);
1836 dest = tcg_temp_new();
1837 if (insn & 0x100) {
1838 SRC_EA(src, OS_LONG, 0, &addr);
1839 tcg_gen_and_i32(dest, src, reg);
1840 DEST_EA(insn, OS_LONG, dest, &addr);
1841 } else {
1842 SRC_EA(src, OS_LONG, 0, NULL);
1843 tcg_gen_and_i32(dest, src, reg);
1844 tcg_gen_mov_i32(reg, dest);
1845 }
1846 gen_logic_cc(s, dest);
1847 }
1848
1849 DISAS_INSN(adda)
1850 {
1851 TCGv src;
1852 TCGv reg;
1853
1854 SRC_EA(src, OS_LONG, 0, NULL);
1855 reg = AREG(insn, 9);
1856 tcg_gen_add_i32(reg, reg, src);
1857 }
1858
1859 DISAS_INSN(addx)
1860 {
1861 TCGv reg;
1862 TCGv src;
1863
1864 gen_flush_flags(s);
1865 reg = DREG(insn, 9);
1866 src = DREG(insn, 0);
1867 gen_helper_addx_cc(reg, cpu_env, reg, src);
1868 s->cc_op = CC_OP_FLAGS;
1869 }
1870
1871 /* TODO: This could be implemented without helper functions. */
1872 DISAS_INSN(shift_im)
1873 {
1874 TCGv reg;
1875 int tmp;
1876 TCGv shift;
1877
1878 reg = DREG(insn, 0);
1879 tmp = (insn >> 9) & 7;
1880 if (tmp == 0)
1881 tmp = 8;
1882 shift = tcg_const_i32(tmp);
1883 /* No need to flush flags becuse we know we will set C flag. */
1884 if (insn & 0x100) {
1885 gen_helper_shl_cc(reg, cpu_env, reg, shift);
1886 } else {
1887 if (insn & 8) {
1888 gen_helper_shr_cc(reg, cpu_env, reg, shift);
1889 } else {
1890 gen_helper_sar_cc(reg, cpu_env, reg, shift);
1891 }
1892 }
1893 s->cc_op = CC_OP_SHIFT;
1894 }
1895
1896 DISAS_INSN(shift_reg)
1897 {
1898 TCGv reg;
1899 TCGv shift;
1900
1901 reg = DREG(insn, 0);
1902 shift = DREG(insn, 9);
1903 /* Shift by zero leaves C flag unmodified. */
1904 gen_flush_flags(s);
1905 if (insn & 0x100) {
1906 gen_helper_shl_cc(reg, cpu_env, reg, shift);
1907 } else {
1908 if (insn & 8) {
1909 gen_helper_shr_cc(reg, cpu_env, reg, shift);
1910 } else {
1911 gen_helper_sar_cc(reg, cpu_env, reg, shift);
1912 }
1913 }
1914 s->cc_op = CC_OP_SHIFT;
1915 }
1916
1917 DISAS_INSN(ff1)
1918 {
1919 TCGv reg;
1920 reg = DREG(insn, 0);
1921 gen_logic_cc(s, reg);
1922 gen_helper_ff1(reg, reg);
1923 }
1924
1925 static TCGv gen_get_sr(DisasContext *s)
1926 {
1927 TCGv ccr;
1928 TCGv sr;
1929
1930 ccr = gen_get_ccr(s);
1931 sr = tcg_temp_new();
1932 tcg_gen_andi_i32(sr, QREG_SR, 0xffe0);
1933 tcg_gen_or_i32(sr, sr, ccr);
1934 return sr;
1935 }
1936
1937 DISAS_INSN(strldsr)
1938 {
1939 uint16_t ext;
1940 uint32_t addr;
1941
1942 addr = s->pc - 2;
1943 ext = lduw_code(s->pc);
1944 s->pc += 2;
1945 if (ext != 0x46FC) {
1946 gen_exception(s, addr, EXCP_UNSUPPORTED);
1947 return;
1948 }
1949 ext = lduw_code(s->pc);
1950 s->pc += 2;
1951 if (IS_USER(s) || (ext & SR_S) == 0) {
1952 gen_exception(s, addr, EXCP_PRIVILEGE);
1953 return;
1954 }
1955 gen_push(s, gen_get_sr(s));
1956 gen_set_sr_im(s, ext, 0);
1957 }
1958
1959 DISAS_INSN(move_from_sr)
1960 {
1961 TCGv reg;
1962 TCGv sr;
1963
1964 if (IS_USER(s)) {
1965 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1966 return;
1967 }
1968 sr = gen_get_sr(s);
1969 reg = DREG(insn, 0);
1970 gen_partset_reg(OS_WORD, reg, sr);
1971 }
1972
1973 DISAS_INSN(move_to_sr)
1974 {
1975 if (IS_USER(s)) {
1976 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1977 return;
1978 }
1979 gen_set_sr(s, insn, 0);
1980 gen_lookup_tb(s);
1981 }
1982
1983 DISAS_INSN(move_from_usp)
1984 {
1985 if (IS_USER(s)) {
1986 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1987 return;
1988 }
1989 /* TODO: Implement USP. */
1990 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
1991 }
1992
1993 DISAS_INSN(move_to_usp)
1994 {
1995 if (IS_USER(s)) {
1996 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1997 return;
1998 }
1999 /* TODO: Implement USP. */
2000 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
2001 }
2002
2003 DISAS_INSN(halt)
2004 {
2005 gen_exception(s, s->pc, EXCP_HALT_INSN);
2006 }
2007
2008 DISAS_INSN(stop)
2009 {
2010 uint16_t ext;
2011
2012 if (IS_USER(s)) {
2013 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2014 return;
2015 }
2016
2017 ext = lduw_code(s->pc);
2018 s->pc += 2;
2019
2020 gen_set_sr_im(s, ext, 0);
2021 tcg_gen_movi_i32(QREG_HALTED, 1);
2022 gen_exception(s, s->pc, EXCP_HLT);
2023 }
2024
2025 DISAS_INSN(rte)
2026 {
2027 if (IS_USER(s)) {
2028 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2029 return;
2030 }
2031 gen_exception(s, s->pc - 2, EXCP_RTE);
2032 }
2033
2034 DISAS_INSN(movec)
2035 {
2036 uint16_t ext;
2037 TCGv reg;
2038
2039 if (IS_USER(s)) {
2040 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2041 return;
2042 }
2043
2044 ext = lduw_code(s->pc);
2045 s->pc += 2;
2046
2047 if (ext & 0x8000) {
2048 reg = AREG(ext, 12);
2049 } else {
2050 reg = DREG(ext, 12);
2051 }
2052 gen_helper_movec(cpu_env, tcg_const_i32(ext & 0xfff), reg);
2053 gen_lookup_tb(s);
2054 }
2055
2056 DISAS_INSN(intouch)
2057 {
2058 if (IS_USER(s)) {
2059 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2060 return;
2061 }
2062 /* ICache fetch. Implement as no-op. */
2063 }
2064
2065 DISAS_INSN(cpushl)
2066 {
2067 if (IS_USER(s)) {
2068 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2069 return;
2070 }
2071 /* Cache push/invalidate. Implement as no-op. */
2072 }
2073
2074 DISAS_INSN(wddata)
2075 {
2076 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2077 }
2078
2079 DISAS_INSN(wdebug)
2080 {
2081 if (IS_USER(s)) {
2082 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2083 return;
2084 }
2085 /* TODO: Implement wdebug. */
2086 qemu_assert(0, "WDEBUG not implemented");
2087 }
2088
2089 DISAS_INSN(trap)
2090 {
2091 gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));
2092 }
2093
2094 /* ??? FP exceptions are not implemented. Most exceptions are deferred until
2095 immediately before the next FP instruction is executed. */
2096 DISAS_INSN(fpu)
2097 {
2098 uint16_t ext;
2099 int32_t offset;
2100 int opmode;
2101 TCGv_i64 src;
2102 TCGv_i64 dest;
2103 TCGv_i64 res;
2104 TCGv tmp32;
2105 int round;
2106 int set_dest;
2107 int opsize;
2108
2109 ext = lduw_code(s->pc);
2110 s->pc += 2;
2111 opmode = ext & 0x7f;
2112 switch ((ext >> 13) & 7) {
2113 case 0: case 2:
2114 break;
2115 case 1:
2116 goto undef;
2117 case 3: /* fmove out */
2118 src = FREG(ext, 7);
2119 tmp32 = tcg_temp_new_i32();
2120 /* fmove */
2121 /* ??? TODO: Proper behavior on overflow. */
2122 switch ((ext >> 10) & 7) {
2123 case 0:
2124 opsize = OS_LONG;
2125 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2126 break;
2127 case 1:
2128 opsize = OS_SINGLE;
2129 gen_helper_f64_to_f32(tmp32, cpu_env, src);
2130 break;
2131 case 4:
2132 opsize = OS_WORD;
2133 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2134 break;
2135 case 5: /* OS_DOUBLE */
2136 tcg_gen_mov_i32(tmp32, AREG(insn, 0));
2137 switch ((insn >> 3) & 7) {
2138 case 2:
2139 case 3:
2140 break;
2141 case 4:
2142 tcg_gen_addi_i32(tmp32, tmp32, -8);
2143 break;
2144 case 5:
2145 offset = ldsw_code(s->pc);
2146 s->pc += 2;
2147 tcg_gen_addi_i32(tmp32, tmp32, offset);
2148 break;
2149 default:
2150 goto undef;
2151 }
2152 gen_store64(s, tmp32, src);
2153 switch ((insn >> 3) & 7) {
2154 case 3:
2155 tcg_gen_addi_i32(tmp32, tmp32, 8);
2156 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2157 break;
2158 case 4:
2159 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2160 break;
2161 }
2162 tcg_temp_free_i32(tmp32);
2163 return;
2164 case 6:
2165 opsize = OS_BYTE;
2166 gen_helper_f64_to_i32(tmp32, cpu_env, src);
2167 break;
2168 default:
2169 goto undef;
2170 }
2171 DEST_EA(insn, opsize, tmp32, NULL);
2172 tcg_temp_free_i32(tmp32);
2173 return;
2174 case 4: /* fmove to control register. */
2175 switch ((ext >> 10) & 7) {
2176 case 4: /* FPCR */
2177 /* Not implemented. Ignore writes. */
2178 break;
2179 case 1: /* FPIAR */
2180 case 2: /* FPSR */
2181 default:
2182 cpu_abort(NULL, "Unimplemented: fmove to control %d",
2183 (ext >> 10) & 7);
2184 }
2185 break;
2186 case 5: /* fmove from control register. */
2187 switch ((ext >> 10) & 7) {
2188 case 4: /* FPCR */
2189 /* Not implemented. Always return zero. */
2190 tmp32 = tcg_const_i32(0);
2191 break;
2192 case 1: /* FPIAR */
2193 case 2: /* FPSR */
2194 default:
2195 cpu_abort(NULL, "Unimplemented: fmove from control %d",
2196 (ext >> 10) & 7);
2197 goto undef;
2198 }
2199 DEST_EA(insn, OS_LONG, tmp32, NULL);
2200 break;
2201 case 6: /* fmovem */
2202 case 7:
2203 {
2204 TCGv addr;
2205 uint16_t mask;
2206 int i;
2207 if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0)
2208 goto undef;
2209 tmp32 = gen_lea(s, insn, OS_LONG);
2210 if (IS_NULL_QREG(tmp32)) {
2211 gen_addr_fault(s);
2212 return;
2213 }
2214 addr = tcg_temp_new_i32();
2215 tcg_gen_mov_i32(addr, tmp32);
2216 mask = 0x80;
2217 for (i = 0; i < 8; i++) {
2218 if (ext & mask) {
2219 s->is_mem = 1;
2220 dest = FREG(i, 0);
2221 if (ext & (1 << 13)) {
2222 /* store */
2223 tcg_gen_qemu_stf64(dest, addr, IS_USER(s));
2224 } else {
2225 /* load */
2226 tcg_gen_qemu_ldf64(dest, addr, IS_USER(s));
2227 }
2228 if (ext & (mask - 1))
2229 tcg_gen_addi_i32(addr, addr, 8);
2230 }
2231 mask >>= 1;
2232 }
2233 tcg_temp_free_i32(addr);
2234 }
2235 return;
2236 }
2237 if (ext & (1 << 14)) {
2238 /* Source effective address. */
2239 switch ((ext >> 10) & 7) {
2240 case 0: opsize = OS_LONG; break;
2241 case 1: opsize = OS_SINGLE; break;
2242 case 4: opsize = OS_WORD; break;
2243 case 5: opsize = OS_DOUBLE; break;
2244 case 6: opsize = OS_BYTE; break;
2245 default:
2246 goto undef;
2247 }
2248 if (opsize == OS_DOUBLE) {
2249 tmp32 = tcg_temp_new_i32();
2250 tcg_gen_mov_i32(tmp32, AREG(insn, 0));
2251 switch ((insn >> 3) & 7) {
2252 case 2:
2253 case 3:
2254 break;
2255 case 4:
2256 tcg_gen_addi_i32(tmp32, tmp32, -8);
2257 break;
2258 case 5:
2259 offset = ldsw_code(s->pc);
2260 s->pc += 2;
2261 tcg_gen_addi_i32(tmp32, tmp32, offset);
2262 break;
2263 case 7:
2264 offset = ldsw_code(s->pc);
2265 offset += s->pc - 2;
2266 s->pc += 2;
2267 tcg_gen_addi_i32(tmp32, tmp32, offset);
2268 break;
2269 default:
2270 goto undef;
2271 }
2272 src = gen_load64(s, tmp32);
2273 switch ((insn >> 3) & 7) {
2274 case 3:
2275 tcg_gen_addi_i32(tmp32, tmp32, 8);
2276 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2277 break;
2278 case 4:
2279 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
2280 break;
2281 }
2282 tcg_temp_free_i32(tmp32);
2283 } else {
2284 SRC_EA(tmp32, opsize, 1, NULL);
2285 src = tcg_temp_new_i64();
2286 switch (opsize) {
2287 case OS_LONG:
2288 case OS_WORD:
2289 case OS_BYTE:
2290 gen_helper_i32_to_f64(src, cpu_env, tmp32);
2291 break;
2292 case OS_SINGLE:
2293 gen_helper_f32_to_f64(src, cpu_env, tmp32);
2294 break;
2295 }
2296 }
2297 } else {
2298 /* Source register. */
2299 src = FREG(ext, 10);
2300 }
2301 dest = FREG(ext, 7);
2302 res = tcg_temp_new_i64();
2303 if (opmode != 0x3a)
2304 tcg_gen_mov_f64(res, dest);
2305 round = 1;
2306 set_dest = 1;
2307 switch (opmode) {
2308 case 0: case 0x40: case 0x44: /* fmove */
2309 tcg_gen_mov_f64(res, src);
2310 break;
2311 case 1: /* fint */
2312 gen_helper_iround_f64(res, cpu_env, src);
2313 round = 0;
2314 break;
2315 case 3: /* fintrz */
2316 gen_helper_itrunc_f64(res, cpu_env, src);
2317 round = 0;
2318 break;
2319 case 4: case 0x41: case 0x45: /* fsqrt */
2320 gen_helper_sqrt_f64(res, cpu_env, src);
2321 break;
2322 case 0x18: case 0x58: case 0x5c: /* fabs */
2323 gen_helper_abs_f64(res, src);
2324 break;
2325 case 0x1a: case 0x5a: case 0x5e: /* fneg */
2326 gen_helper_chs_f64(res, src);
2327 break;
2328 case 0x20: case 0x60: case 0x64: /* fdiv */
2329 gen_helper_div_f64(res, cpu_env, res, src);
2330 break;
2331 case 0x22: case 0x62: case 0x66: /* fadd */
2332 gen_helper_add_f64(res, cpu_env, res, src);
2333 break;
2334 case 0x23: case 0x63: case 0x67: /* fmul */
2335 gen_helper_mul_f64(res, cpu_env, res, src);
2336 break;
2337 case 0x28: case 0x68: case 0x6c: /* fsub */
2338 gen_helper_sub_f64(res, cpu_env, res, src);
2339 break;
2340 case 0x38: /* fcmp */
2341 gen_helper_sub_cmp_f64(res, cpu_env, res, src);
2342 set_dest = 0;
2343 round = 0;
2344 break;
2345 case 0x3a: /* ftst */
2346 tcg_gen_mov_f64(res, src);
2347 set_dest = 0;
2348 round = 0;
2349 break;
2350 default:
2351 goto undef;
2352 }
2353 if (ext & (1 << 14)) {
2354 tcg_temp_free_i64(src);
2355 }
2356 if (round) {
2357 if (opmode & 0x40) {
2358 if ((opmode & 0x4) != 0)
2359 round = 0;
2360 } else if ((s->fpcr & M68K_FPCR_PREC) == 0) {
2361 round = 0;
2362 }
2363 }
2364 if (round) {
2365 TCGv tmp = tcg_temp_new_i32();
2366 gen_helper_f64_to_f32(tmp, cpu_env, res);
2367 gen_helper_f32_to_f64(res, cpu_env, tmp);
2368 tcg_temp_free_i32(tmp);
2369 }
2370 tcg_gen_mov_f64(QREG_FP_RESULT, res);
2371 if (set_dest) {
2372 tcg_gen_mov_f64(dest, res);
2373 }
2374 tcg_temp_free_i64(res);
2375 return;
2376 undef:
2377 /* FIXME: Is this right for offset addressing modes? */
2378 s->pc -= 2;
2379 disas_undef_fpu(s, insn);
2380 }
2381
2382 DISAS_INSN(fbcc)
2383 {
2384 uint32_t offset;
2385 uint32_t addr;
2386 TCGv flag;
2387 int l1;
2388
2389 addr = s->pc;
2390 offset = ldsw_code(s->pc);
2391 s->pc += 2;
2392 if (insn & (1 << 6)) {
2393 offset = (offset << 16) | lduw_code(s->pc);
2394 s->pc += 2;
2395 }
2396
2397 l1 = gen_new_label();
2398 /* TODO: Raise BSUN exception. */
2399 flag = tcg_temp_new();
2400 gen_helper_compare_f64(flag, cpu_env, QREG_FP_RESULT);
2401 /* Jump to l1 if condition is true. */
2402 switch (insn & 0xf) {
2403 case 0: /* f */
2404 break;
2405 case 1: /* eq (=0) */
2406 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
2407 break;
2408 case 2: /* ogt (=1) */
2409 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(1), l1);
2410 break;
2411 case 3: /* oge (=0 or =1) */
2412 tcg_gen_brcond_i32(TCG_COND_LEU, flag, tcg_const_i32(1), l1);
2413 break;
2414 case 4: /* olt (=-1) */
2415 tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(0), l1);
2416 break;
2417 case 5: /* ole (=-1 or =0) */
2418 tcg_gen_brcond_i32(TCG_COND_LE, flag, tcg_const_i32(0), l1);
2419 break;
2420 case 6: /* ogl (=-1 or =1) */
2421 tcg_gen_andi_i32(flag, flag, 1);
2422 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
2423 break;
2424 case 7: /* or (=2) */
2425 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(2), l1);
2426 break;
2427 case 8: /* un (<2) */
2428 tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(2), l1);
2429 break;
2430 case 9: /* ueq (=0 or =2) */
2431 tcg_gen_andi_i32(flag, flag, 1);
2432 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
2433 break;
2434 case 10: /* ugt (>0) */
2435 tcg_gen_brcond_i32(TCG_COND_GT, flag, tcg_const_i32(0), l1);
2436 break;
2437 case 11: /* uge (>=0) */
2438 tcg_gen_brcond_i32(TCG_COND_GE, flag, tcg_const_i32(0), l1);
2439 break;
2440 case 12: /* ult (=-1 or =2) */
2441 tcg_gen_brcond_i32(TCG_COND_GEU, flag, tcg_const_i32(2), l1);
2442 break;
2443 case 13: /* ule (!=1) */
2444 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(1), l1);
2445 break;
2446 case 14: /* ne (!=0) */
2447 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
2448 break;
2449 case 15: /* t */
2450 tcg_gen_br(l1);
2451 break;
2452 }
2453 gen_jmp_tb(s, 0, s->pc);
2454 gen_set_label(l1);
2455 gen_jmp_tb(s, 1, addr + offset);
2456 }
2457
2458 DISAS_INSN(frestore)
2459 {
2460 /* TODO: Implement frestore. */
2461 qemu_assert(0, "FRESTORE not implemented");
2462 }
2463
2464 DISAS_INSN(fsave)
2465 {
2466 /* TODO: Implement fsave. */
2467 qemu_assert(0, "FSAVE not implemented");
2468 }
2469
2470 static inline TCGv gen_mac_extract_word(DisasContext *s, TCGv val, int upper)
2471 {
2472 TCGv tmp = tcg_temp_new();
2473 if (s->env->macsr & MACSR_FI) {
2474 if (upper)
2475 tcg_gen_andi_i32(tmp, val, 0xffff0000);
2476 else
2477 tcg_gen_shli_i32(tmp, val, 16);
2478 } else if (s->env->macsr & MACSR_SU) {
2479 if (upper)
2480 tcg_gen_sari_i32(tmp, val, 16);
2481 else
2482 tcg_gen_ext16s_i32(tmp, val);
2483 } else {
2484 if (upper)
2485 tcg_gen_shri_i32(tmp, val, 16);
2486 else
2487 tcg_gen_ext16u_i32(tmp, val);
2488 }
2489 return tmp;
2490 }
2491
2492 static void gen_mac_clear_flags(void)
2493 {
2494 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR,
2495 ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV));
2496 }
2497
2498 DISAS_INSN(mac)
2499 {
2500 TCGv rx;
2501 TCGv ry;
2502 uint16_t ext;
2503 int acc;
2504 TCGv tmp;
2505 TCGv addr;
2506 TCGv loadval;
2507 int dual;
2508 TCGv saved_flags;
2509
2510 if (!s->done_mac) {
2511 s->mactmp = tcg_temp_new_i64();
2512 s->done_mac = 1;
2513 }
2514
2515 ext = lduw_code(s->pc);
2516 s->pc += 2;
2517
2518 acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
2519 dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
2520 if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) {
2521 disas_undef(s, insn);
2522 return;
2523 }
2524 if (insn & 0x30) {
2525 /* MAC with load. */
2526 tmp = gen_lea(s, insn, OS_LONG);
2527 addr = tcg_temp_new();
2528 tcg_gen_and_i32(addr, tmp, QREG_MAC_MASK);
2529 /* Load the value now to ensure correct exception behavior.
2530 Perform writeback after reading the MAC inputs. */
2531 loadval = gen_load(s, OS_LONG, addr, 0);
2532
2533 acc ^= 1;
2534 rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
2535 ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
2536 } else {
2537 loadval = addr = NULL_QREG;
2538 rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2539 ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2540 }
2541
2542 gen_mac_clear_flags();
2543 #if 0
2544 l1 = -1;
2545 /* Disabled because conditional branches clobber temporary vars. */
2546 if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
2547 /* Skip the multiply if we know we will ignore it. */
2548 l1 = gen_new_label();
2549 tmp = tcg_temp_new();
2550 tcg_gen_andi_i32(tmp, QREG_MACSR, 1 << (acc + 8));
2551 gen_op_jmp_nz32(tmp, l1);
2552 }
2553 #endif
2554
2555 if ((ext & 0x0800) == 0) {
2556 /* Word. */
2557 rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
2558 ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
2559 }
2560 if (s->env->macsr & MACSR_FI) {
2561 gen_helper_macmulf(s->mactmp, cpu_env, rx, ry);
2562 } else {
2563 if (s->env->macsr & MACSR_SU)
2564 gen_helper_macmuls(s->mactmp, cpu_env, rx, ry);
2565 else
2566 gen_helper_macmulu(s->mactmp, cpu_env, rx, ry);
2567 switch ((ext >> 9) & 3) {
2568 case 1:
2569 tcg_gen_shli_i64(s->mactmp, s->mactmp, 1);
2570 break;
2571 case 3:
2572 tcg_gen_shri_i64(s->mactmp, s->mactmp, 1);
2573 break;
2574 }
2575 }
2576
2577 if (dual) {
2578 /* Save the overflow flag from the multiply. */
2579 saved_flags = tcg_temp_new();
2580 tcg_gen_mov_i32(saved_flags, QREG_MACSR);
2581 } else {
2582 saved_flags = NULL_QREG;
2583 }
2584
2585 #if 0
2586 /* Disabled because conditional branches clobber temporary vars. */
2587 if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
2588 /* Skip the accumulate if the value is already saturated. */
2589 l1 = gen_new_label();
2590 tmp = tcg_temp_new();
2591 gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
2592 gen_op_jmp_nz32(tmp, l1);
2593 }
2594 #endif
2595
2596 if (insn & 0x100)
2597 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
2598 else
2599 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
2600
2601 if (s->env->macsr & MACSR_FI)
2602 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
2603 else if (s->env->macsr & MACSR_SU)
2604 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
2605 else
2606 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
2607
2608 #if 0
2609 /* Disabled because conditional branches clobber temporary vars. */
2610 if (l1 != -1)
2611 gen_set_label(l1);
2612 #endif
2613
2614 if (dual) {
2615 /* Dual accumulate variant. */
2616 acc = (ext >> 2) & 3;
2617 /* Restore the overflow flag from the multiplier. */
2618 tcg_gen_mov_i32(QREG_MACSR, saved_flags);
2619 #if 0
2620 /* Disabled because conditional branches clobber temporary vars. */
2621 if ((s->env->macsr & MACSR_OMC) != 0) {
2622 /* Skip the accumulate if the value is already saturated. */
2623 l1 = gen_new_label();
2624 tmp = tcg_temp_new();
2625 gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
2626 gen_op_jmp_nz32(tmp, l1);
2627 }
2628 #endif
2629 if (ext & 2)
2630 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
2631 else
2632 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
2633 if (s->env->macsr & MACSR_FI)
2634 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
2635 else if (s->env->macsr & MACSR_SU)
2636 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
2637 else
2638 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
2639 #if 0
2640 /* Disabled because conditional branches clobber temporary vars. */
2641 if (l1 != -1)
2642 gen_set_label(l1);
2643 #endif
2644 }
2645 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(acc));
2646
2647 if (insn & 0x30) {
2648 TCGv rw;
2649 rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2650 tcg_gen_mov_i32(rw, loadval);
2651 /* FIXME: Should address writeback happen with the masked or
2652 unmasked value? */
2653 switch ((insn >> 3) & 7) {
2654 case 3: /* Post-increment. */
2655 tcg_gen_addi_i32(AREG(insn, 0), addr, 4);
2656 break;
2657 case 4: /* Pre-decrement. */
2658 tcg_gen_mov_i32(AREG(insn, 0), addr);
2659 }
2660 }
2661 }
2662
2663 DISAS_INSN(from_mac)
2664 {
2665 TCGv rx;
2666 TCGv_i64 acc;
2667 int accnum;
2668
2669 rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2670 accnum = (insn >> 9) & 3;
2671 acc = MACREG(accnum);
2672 if (s->env->macsr & MACSR_FI) {
2673 gen_helper_get_macf(rx, cpu_env, acc);
2674 } else if ((s->env->macsr & MACSR_OMC) == 0) {
2675 tcg_gen_trunc_i64_i32(rx, acc);
2676 } else if (s->env->macsr & MACSR_SU) {
2677 gen_helper_get_macs(rx, acc);
2678 } else {
2679 gen_helper_get_macu(rx, acc);
2680 }
2681 if (insn & 0x40) {
2682 tcg_gen_movi_i64(acc, 0);
2683 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
2684 }
2685 }
2686
2687 DISAS_INSN(move_mac)
2688 {
2689 /* FIXME: This can be done without a helper. */
2690 int src;
2691 TCGv dest;
2692 src = insn & 3;
2693 dest = tcg_const_i32((insn >> 9) & 3);
2694 gen_helper_mac_move(cpu_env, dest, tcg_const_i32(src));
2695 gen_mac_clear_flags();
2696 gen_helper_mac_set_flags(cpu_env, dest);
2697 }
2698
2699 DISAS_INSN(from_macsr)
2700 {
2701 TCGv reg;
2702
2703 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2704 tcg_gen_mov_i32(reg, QREG_MACSR);
2705 }
2706
2707 DISAS_INSN(from_mask)
2708 {
2709 TCGv reg;
2710 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2711 tcg_gen_mov_i32(reg, QREG_MAC_MASK);
2712 }
2713
2714 DISAS_INSN(from_mext)
2715 {
2716 TCGv reg;
2717 TCGv acc;
2718 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2719 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
2720 if (s->env->macsr & MACSR_FI)
2721 gen_helper_get_mac_extf(reg, cpu_env, acc);
2722 else
2723 gen_helper_get_mac_exti(reg, cpu_env, acc);
2724 }
2725
2726 DISAS_INSN(macsr_to_ccr)
2727 {
2728 tcg_gen_movi_i32(QREG_CC_X, 0);
2729 tcg_gen_andi_i32(QREG_CC_DEST, QREG_MACSR, 0xf);
2730 s->cc_op = CC_OP_FLAGS;
2731 }
2732
2733 DISAS_INSN(to_mac)
2734 {
2735 TCGv_i64 acc;
2736 TCGv val;
2737 int accnum;
2738 accnum = (insn >> 9) & 3;
2739 acc = MACREG(accnum);
2740 SRC_EA(val, OS_LONG, 0, NULL);
2741 if (s->env->macsr & MACSR_FI) {
2742 tcg_gen_ext_i32_i64(acc, val);
2743 tcg_gen_shli_i64(acc, acc, 8);
2744 } else if (s->env->macsr & MACSR_SU) {
2745 tcg_gen_ext_i32_i64(acc, val);
2746 } else {
2747 tcg_gen_extu_i32_i64(acc, val);
2748 }
2749 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
2750 gen_mac_clear_flags();
2751 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(accnum));
2752 }
2753
2754 DISAS_INSN(to_macsr)
2755 {
2756 TCGv val;
2757 SRC_EA(val, OS_LONG, 0, NULL);
2758 gen_helper_set_macsr(cpu_env, val);
2759 gen_lookup_tb(s);
2760 }
2761
2762 DISAS_INSN(to_mask)
2763 {
2764 TCGv val;
2765 SRC_EA(val, OS_LONG, 0, NULL);
2766 tcg_gen_ori_i32(QREG_MAC_MASK, val, 0xffff0000);
2767 }
2768
2769 DISAS_INSN(to_mext)
2770 {
2771 TCGv val;
2772 TCGv acc;
2773 SRC_EA(val, OS_LONG, 0, NULL);
2774 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
2775 if (s->env->macsr & MACSR_FI)
2776 gen_helper_set_mac_extf(cpu_env, val, acc);
2777 else if (s->env->macsr & MACSR_SU)
2778 gen_helper_set_mac_exts(cpu_env, val, acc);
2779 else
2780 gen_helper_set_mac_extu(cpu_env, val, acc);
2781 }
2782
2783 static disas_proc opcode_table[65536];
2784
2785 static void
2786 register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
2787 {
2788 int i;
2789 int from;
2790 int to;
2791
2792 /* Sanity check. All set bits must be included in the mask. */
2793 if (opcode & ~mask) {
2794 fprintf(stderr,
2795 "qemu internal error: bogus opcode definition %04x/%04x\n",
2796 opcode, mask);
2797 abort();
2798 }
2799 /* This could probably be cleverer. For now just optimize the case where
2800 the top bits are known. */
2801 /* Find the first zero bit in the mask. */
2802 i = 0x8000;
2803 while ((i & mask) != 0)
2804 i >>= 1;
2805 /* Iterate over all combinations of this and lower bits. */
2806 if (i == 0)
2807 i = 1;
2808 else
2809 i <<= 1;
2810 from = opcode & ~(i - 1);
2811 to = from + i;
2812 for (i = from; i < to; i++) {
2813 if ((i & mask) == opcode)
2814 opcode_table[i] = proc;
2815 }
2816 }
2817
2818 /* Register m68k opcode handlers. Order is important.
2819 Later insn override earlier ones. */
2820 void register_m68k_insns (CPUM68KState *env)
2821 {
2822 #define INSN(name, opcode, mask, feature) do { \
2823 if (m68k_feature(env, M68K_FEATURE_##feature)) \
2824 register_opcode(disas_##name, 0x##opcode, 0x##mask); \
2825 } while(0)
2826 INSN(undef, 0000, 0000, CF_ISA_A);
2827 INSN(arith_im, 0080, fff8, CF_ISA_A);
2828 INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
2829 INSN(bitop_reg, 0100, f1c0, CF_ISA_A);
2830 INSN(bitop_reg, 0140, f1c0, CF_ISA_A);
2831 INSN(bitop_reg, 0180, f1c0, CF_ISA_A);
2832 INSN(bitop_reg, 01c0, f1c0, CF_ISA_A);
2833 INSN(arith_im, 0280, fff8, CF_ISA_A);
2834 INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
2835 INSN(arith_im, 0480, fff8, CF_ISA_A);
2836 INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
2837 INSN(arith_im, 0680, fff8, CF_ISA_A);
2838 INSN(bitop_im, 0800, ffc0, CF_ISA_A);
2839 INSN(bitop_im, 0840, ffc0, CF_ISA_A);
2840 INSN(bitop_im, 0880, ffc0, CF_ISA_A);
2841 INSN(bitop_im, 08c0, ffc0, CF_ISA_A);
2842 INSN(arith_im, 0a80, fff8, CF_ISA_A);
2843 INSN(arith_im, 0c00, ff38, CF_ISA_A);
2844 INSN(move, 1000, f000, CF_ISA_A);
2845 INSN(move, 2000, f000, CF_ISA_A);
2846 INSN(move, 3000, f000, CF_ISA_A);
2847 INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC);
2848 INSN(negx, 4080, fff8, CF_ISA_A);
2849 INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
2850 INSN(lea, 41c0, f1c0, CF_ISA_A);
2851 INSN(clr, 4200, ff00, CF_ISA_A);
2852 INSN(undef, 42c0, ffc0, CF_ISA_A);
2853 INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
2854 INSN(neg, 4480, fff8, CF_ISA_A);
2855 INSN(move_to_ccr, 44c0, ffc0, CF_ISA_A);
2856 INSN(not, 4680, fff8, CF_ISA_A);
2857 INSN(move_to_sr, 46c0, ffc0, CF_ISA_A);
2858 INSN(pea, 4840, ffc0, CF_ISA_A);
2859 INSN(swap, 4840, fff8, CF_ISA_A);
2860 INSN(movem, 48c0, fbc0, CF_ISA_A);
2861 INSN(ext, 4880, fff8, CF_ISA_A);
2862 INSN(ext, 48c0, fff8, CF_ISA_A);
2863 INSN(ext, 49c0, fff8, CF_ISA_A);
2864 INSN(tst, 4a00, ff00, CF_ISA_A);
2865 INSN(tas, 4ac0, ffc0, CF_ISA_B);
2866 INSN(halt, 4ac8, ffff, CF_ISA_A);
2867 INSN(pulse, 4acc, ffff, CF_ISA_A);
2868 INSN(illegal, 4afc, ffff, CF_ISA_A);
2869 INSN(mull, 4c00, ffc0, CF_ISA_A);
2870 INSN(divl, 4c40, ffc0, CF_ISA_A);
2871 INSN(sats, 4c80, fff8, CF_ISA_B);
2872 INSN(trap, 4e40, fff0, CF_ISA_A);
2873 INSN(link, 4e50, fff8, CF_ISA_A);
2874 INSN(unlk, 4e58, fff8, CF_ISA_A);
2875 INSN(move_to_usp, 4e60, fff8, USP);
2876 INSN(move_from_usp, 4e68, fff8, USP);
2877 INSN(nop, 4e71, ffff, CF_ISA_A);
2878 INSN(stop, 4e72, ffff, CF_ISA_A);
2879 INSN(rte, 4e73, ffff, CF_ISA_A);
2880 INSN(rts, 4e75, ffff, CF_ISA_A);
2881 INSN(movec, 4e7b, ffff, CF_ISA_A);
2882 INSN(jump, 4e80, ffc0, CF_ISA_A);
2883 INSN(jump, 4ec0, ffc0, CF_ISA_A);
2884 INSN(addsubq, 5180, f1c0, CF_ISA_A);
2885 INSN(scc, 50c0, f0f8, CF_ISA_A);
2886 INSN(addsubq, 5080, f1c0, CF_ISA_A);
2887 INSN(tpf, 51f8, fff8, CF_ISA_A);
2888
2889 /* Branch instructions. */
2890 INSN(branch, 6000, f000, CF_ISA_A);
2891 /* Disable long branch instructions, then add back the ones we want. */
2892 INSN(undef, 60ff, f0ff, CF_ISA_A); /* All long branches. */
2893 INSN(branch, 60ff, f0ff, CF_ISA_B);
2894 INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */
2895 INSN(branch, 60ff, ffff, BRAL);
2896
2897 INSN(moveq, 7000, f100, CF_ISA_A);
2898 INSN(mvzs, 7100, f100, CF_ISA_B);
2899 INSN(or, 8000, f000, CF_ISA_A);
2900 INSN(divw, 80c0, f0c0, CF_ISA_A);
2901 INSN(addsub, 9000, f000, CF_ISA_A);
2902 INSN(subx, 9180, f1f8, CF_ISA_A);
2903 INSN(suba, 91c0, f1c0, CF_ISA_A);
2904
2905 INSN(undef_mac, a000, f000, CF_ISA_A);
2906 INSN(mac, a000, f100, CF_EMAC);
2907 INSN(from_mac, a180, f9b0, CF_EMAC);
2908 INSN(move_mac, a110, f9fc, CF_EMAC);
2909 INSN(from_macsr,a980, f9f0, CF_EMAC);
2910 INSN(from_mask, ad80, fff0, CF_EMAC);
2911 INSN(from_mext, ab80, fbf0, CF_EMAC);
2912 INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
2913 INSN(to_mac, a100, f9c0, CF_EMAC);
2914 INSN(to_macsr, a900, ffc0, CF_EMAC);
2915 INSN(to_mext, ab00, fbc0, CF_EMAC);
2916 INSN(to_mask, ad00, ffc0, CF_EMAC);
2917
2918 INSN(mov3q, a140, f1c0, CF_ISA_B);
2919 INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
2920 INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
2921 INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
2922 INSN(cmp, b080, f1c0, CF_ISA_A);
2923 INSN(cmpa, b1c0, f1c0, CF_ISA_A);
2924 INSN(eor, b180, f1c0, CF_ISA_A);
2925 INSN(and, c000, f000, CF_ISA_A);
2926 INSN(mulw, c0c0, f0c0, CF_ISA_A);
2927 INSN(addsub, d000, f000, CF_ISA_A);
2928 INSN(addx, d180, f1f8, CF_ISA_A);
2929 INSN(adda, d1c0, f1c0, CF_ISA_A);
2930 INSN(shift_im, e080, f0f0, CF_ISA_A);
2931 INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
2932 INSN(undef_fpu, f000, f000, CF_ISA_A);
2933 INSN(fpu, f200, ffc0, CF_FPU);
2934 INSN(fbcc, f280, ffc0, CF_FPU);
2935 INSN(frestore, f340, ffc0, CF_FPU);
2936 INSN(fsave, f340, ffc0, CF_FPU);
2937 INSN(intouch, f340, ffc0, CF_ISA_A);
2938 INSN(cpushl, f428, ff38, CF_ISA_A);
2939 INSN(wddata, fb00, ff00, CF_ISA_A);
2940 INSN(wdebug, fbc0, ffc0, CF_ISA_A);
2941 #undef INSN
2942 }
2943
2944 /* ??? Some of this implementation is not exception safe. We should always
2945 write back the result to memory before setting the condition codes. */
2946 static void disas_m68k_insn(CPUState * env, DisasContext *s)
2947 {
2948 uint16_t insn;
2949
2950 insn = lduw_code(s->pc);
2951 s->pc += 2;
2952
2953 opcode_table[insn](s, insn);
2954 }
2955
2956 /* generate intermediate code for basic block 'tb'. */
2957 static inline void
2958 gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
2959 int search_pc)
2960 {
2961 DisasContext dc1, *dc = &dc1;
2962 uint16_t *gen_opc_end;
2963 CPUBreakpoint *bp;
2964 int j, lj;
2965 target_ulong pc_start;
2966 int pc_offset;
2967 int num_insns;
2968 int max_insns;
2969
2970 /* generate intermediate code */
2971 pc_start = tb->pc;
2972
2973 dc->tb = tb;
2974
2975 gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
2976
2977 dc->env = env;
2978 dc->is_jmp = DISAS_NEXT;
2979 dc->pc = pc_start;
2980 dc->cc_op = CC_OP_DYNAMIC;
2981 dc->singlestep_enabled = env->singlestep_enabled;
2982 dc->fpcr = env->fpcr;
2983 dc->user = (env->sr & SR_S) == 0;
2984 dc->is_mem = 0;
2985 dc->done_mac = 0;
2986 lj = -1;
2987 num_insns = 0;
2988 max_insns = tb->cflags & CF_COUNT_MASK;
2989 if (max_insns == 0)
2990 max_insns = CF_COUNT_MASK;
2991
2992 gen_icount_start();
2993 do {
2994 pc_offset = dc->pc - pc_start;
2995 gen_throws_exception = NULL;
2996 if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
2997 QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
2998 if (bp->pc == dc->pc) {
2999 gen_exception(dc, dc->pc, EXCP_DEBUG);
3000 dc->is_jmp = DISAS_JUMP;
3001 break;
3002 }
3003 }
3004 if (dc->is_jmp)
3005 break;
3006 }
3007 if (search_pc) {
3008 j = gen_opc_ptr - gen_opc_buf;
3009 if (lj < j) {
3010 lj++;
3011 while (lj < j)
3012 gen_opc_instr_start[lj++] = 0;
3013 }
3014 gen_opc_pc[lj] = dc->pc;
3015 gen_opc_instr_start[lj] = 1;
3016 gen_opc_icount[lj] = num_insns;
3017 }
3018 if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
3019 gen_io_start();
3020 dc->insn_pc = dc->pc;
3021 disas_m68k_insn(env, dc);
3022 num_insns++;
3023 } while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
3024 !env->singlestep_enabled &&
3025 !singlestep &&
3026 (pc_offset) < (TARGET_PAGE_SIZE - 32) &&
3027 num_insns < max_insns);
3028
3029 if (tb->cflags & CF_LAST_IO)
3030 gen_io_end();
3031 if (unlikely(env->singlestep_enabled)) {
3032 /* Make sure the pc is updated, and raise a debug exception. */
3033 if (!dc->is_jmp) {
3034 gen_flush_cc_op(dc);
3035 tcg_gen_movi_i32(QREG_PC, dc->pc);
3036 }
3037 gen_helper_raise_exception(tcg_const_i32(EXCP_DEBUG));
3038 } else {
3039 switch(dc->is_jmp) {
3040 case DISAS_NEXT:
3041 gen_flush_cc_op(dc);
3042 gen_jmp_tb(dc, 0, dc->pc);
3043 break;
3044 default:
3045 case DISAS_JUMP:
3046 case DISAS_UPDATE:
3047 gen_flush_cc_op(dc);
3048 /* indicate that the hash table must be used to find the next TB */
3049 tcg_gen_exit_tb(0);
3050 break;
3051 case DISAS_TB_JUMP:
3052 /* nothing more to generate */
3053 break;
3054 }
3055 }
3056 gen_icount_end(tb, num_insns);
3057 *gen_opc_ptr = INDEX_op_end;
3058
3059 #ifdef DEBUG_DISAS
3060 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
3061 qemu_log("----------------\n");
3062 qemu_log("IN: %s\n", lookup_symbol(pc_start));
3063 log_target_disas(pc_start, dc->pc - pc_start, 0);
3064 qemu_log("\n");
3065 }
3066 #endif
3067 if (search_pc) {
3068 j = gen_opc_ptr - gen_opc_buf;
3069 lj++;
3070 while (lj <= j)
3071 gen_opc_instr_start[lj++] = 0;
3072 } else {
3073 tb->size = dc->pc - pc_start;
3074 tb->icount = num_insns;
3075 }
3076
3077 //optimize_flags();
3078 //expand_target_qops();
3079 }
3080
3081 void gen_intermediate_code(CPUState *env, TranslationBlock *tb)
3082 {
3083 gen_intermediate_code_internal(env, tb, 0);
3084 }
3085
3086 void gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb)
3087 {
3088 gen_intermediate_code_internal(env, tb, 1);
3089 }
3090
3091 void cpu_dump_state(CPUState *env, FILE *f, fprintf_function cpu_fprintf,
3092 int flags)
3093 {
3094 int i;
3095 uint16_t sr;
3096 CPU_DoubleU u;
3097 for (i = 0; i < 8; i++)
3098 {
3099 u.d = env->fregs[i];
3100 cpu_fprintf (f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n",
3101 i, env->dregs[i], i, env->aregs[i],
3102 i, u.l.upper, u.l.lower, *(double *)&u.d);
3103 }
3104 cpu_fprintf (f, "PC = %08x ", env->pc);
3105 sr = env->sr;
3106 cpu_fprintf (f, "SR = %04x %c%c%c%c%c ", sr, (sr & 0x10) ? 'X' : '-',
3107 (sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-',
3108 (sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-');
3109 cpu_fprintf (f, "FPRESULT = %12g\n", *(double *)&env->fp_result);
3110 }
3111
3112 void restore_state_to_opc(CPUState *env, TranslationBlock *tb, int pc_pos)
3113 {
3114 env->pc = gen_opc_pc[pc_pos];
3115 }
QEmu