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target-m68k: increment/decrement with SP
[qemu/ar7.git] / target / m68k / translate.c
blob9f60fbc0db1867628c1fc6cf1f736d9852981db0
1 /*
2 * m68k translation
3 *
4 * Copyright (c) 2005-2007 CodeSourcery
5 * Written by Paul Brook
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "qemu/osdep.h"
22 #include "cpu.h"
23 #include "disas/disas.h"
24 #include "exec/exec-all.h"
25 #include "tcg-op.h"
26 #include "qemu/log.h"
27 #include "exec/cpu_ldst.h"
28
29 #include "exec/helper-proto.h"
30 #include "exec/helper-gen.h"
31
32 #include "trace-tcg.h"
33 #include "exec/log.h"
34
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_i32 cpu_halted;
52 static TCGv_i32 cpu_exception_index;
53
54 static TCGv_env cpu_env;
55
56 static char cpu_reg_names[3*8*3 + 5*4];
57 static TCGv cpu_dregs[8];
58 static TCGv cpu_aregs[8];
59 static TCGv_i64 cpu_fregs[8];
60 static TCGv_i64 cpu_macc[4];
61
62 #define REG(insn, pos) (((insn) >> (pos)) & 7)
63 #define DREG(insn, pos) cpu_dregs[REG(insn, pos)]
64 #define AREG(insn, pos) get_areg(s, REG(insn, pos))
65 #define FREG(insn, pos) cpu_fregs[REG(insn, pos)]
66 #define MACREG(acc) cpu_macc[acc]
67 #define QREG_SP get_areg(s, 7)
68
69 static TCGv NULL_QREG;
70 #define IS_NULL_QREG(t) (TCGV_EQUAL(t, NULL_QREG))
71 /* Used to distinguish stores from bad addressing modes. */
72 static TCGv store_dummy;
73
74 #include "exec/gen-icount.h"
75
76 void m68k_tcg_init(void)
77 {
78 char *p;
79 int i;
80
81 cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
82 tcg_ctx.tcg_env = cpu_env;
83
84 #define DEFO32(name, offset) \
85 QREG_##name = tcg_global_mem_new_i32(cpu_env, \
86 offsetof(CPUM68KState, offset), #name);
87 #define DEFO64(name, offset) \
88 QREG_##name = tcg_global_mem_new_i64(cpu_env, \
89 offsetof(CPUM68KState, offset), #name);
90 #define DEFF64(name, offset) DEFO64(name, offset)
91 #include "qregs.def"
92 #undef DEFO32
93 #undef DEFO64
94 #undef DEFF64
95
96 cpu_halted = tcg_global_mem_new_i32(cpu_env,
97 -offsetof(M68kCPU, env) +
98 offsetof(CPUState, halted), "HALTED");
99 cpu_exception_index = tcg_global_mem_new_i32(cpu_env,
100 -offsetof(M68kCPU, env) +
101 offsetof(CPUState, exception_index),
102 "EXCEPTION");
103
104 p = cpu_reg_names;
105 for (i = 0; i < 8; i++) {
106 sprintf(p, "D%d", i);
107 cpu_dregs[i] = tcg_global_mem_new(cpu_env,
108 offsetof(CPUM68KState, dregs[i]), p);
109 p += 3;
110 sprintf(p, "A%d", i);
111 cpu_aregs[i] = tcg_global_mem_new(cpu_env,
112 offsetof(CPUM68KState, aregs[i]), p);
113 p += 3;
114 sprintf(p, "F%d", i);
115 cpu_fregs[i] = tcg_global_mem_new_i64(cpu_env,
116 offsetof(CPUM68KState, fregs[i]), p);
117 p += 3;
118 }
119 for (i = 0; i < 4; i++) {
120 sprintf(p, "ACC%d", i);
121 cpu_macc[i] = tcg_global_mem_new_i64(cpu_env,
122 offsetof(CPUM68KState, macc[i]), p);
123 p += 5;
124 }
125
126 NULL_QREG = tcg_global_mem_new(cpu_env, -4, "NULL");
127 store_dummy = tcg_global_mem_new(cpu_env, -8, "NULL");
128 }
129
130 /* internal defines */
131 typedef struct DisasContext {
132 CPUM68KState *env;
133 target_ulong insn_pc; /* Start of the current instruction. */
134 target_ulong pc;
135 int is_jmp;
136 CCOp cc_op; /* Current CC operation */
137 int cc_op_synced;
138 int user;
139 uint32_t fpcr;
140 struct TranslationBlock *tb;
141 int singlestep_enabled;
142 TCGv_i64 mactmp;
143 int done_mac;
144 int writeback_mask;
145 TCGv writeback[8];
146 } DisasContext;
147
148 static TCGv get_areg(DisasContext *s, unsigned regno)
149 {
150 if (s->writeback_mask & (1 << regno)) {
151 return s->writeback[regno];
152 } else {
153 return cpu_aregs[regno];
154 }
155 }
156
157 static void delay_set_areg(DisasContext *s, unsigned regno,
158 TCGv val, bool give_temp)
159 {
160 if (s->writeback_mask & (1 << regno)) {
161 if (give_temp) {
162 tcg_temp_free(s->writeback[regno]);
163 s->writeback[regno] = val;
164 } else {
165 tcg_gen_mov_i32(s->writeback[regno], val);
166 }
167 } else {
168 s->writeback_mask |= 1 << regno;
169 if (give_temp) {
170 s->writeback[regno] = val;
171 } else {
172 TCGv tmp = tcg_temp_new();
173 s->writeback[regno] = tmp;
174 tcg_gen_mov_i32(tmp, val);
175 }
176 }
177 }
178
179 static void do_writebacks(DisasContext *s)
180 {
181 unsigned mask = s->writeback_mask;
182 if (mask) {
183 s->writeback_mask = 0;
184 do {
185 unsigned regno = ctz32(mask);
186 tcg_gen_mov_i32(cpu_aregs[regno], s->writeback[regno]);
187 tcg_temp_free(s->writeback[regno]);
188 mask &= mask - 1;
189 } while (mask);
190 }
191 }
192
193 #define DISAS_JUMP_NEXT 4
194
195 #if defined(CONFIG_USER_ONLY)
196 #define IS_USER(s) 1
197 #else
198 #define IS_USER(s) s->user
199 #endif
200
201 /* XXX: move that elsewhere */
202 /* ??? Fix exceptions. */
203 static void *gen_throws_exception;
204 #define gen_last_qop NULL
205
206 typedef void (*disas_proc)(CPUM68KState *env, DisasContext *s, uint16_t insn);
207
208 #ifdef DEBUG_DISPATCH
209 #define DISAS_INSN(name) \
210 static void real_disas_##name(CPUM68KState *env, DisasContext *s, \
211 uint16_t insn); \
212 static void disas_##name(CPUM68KState *env, DisasContext *s, \
213 uint16_t insn) \
214 { \
215 qemu_log("Dispatch " #name "\n"); \
216 real_disas_##name(env, s, insn); \
217 } \
218 static void real_disas_##name(CPUM68KState *env, DisasContext *s, \
219 uint16_t insn)
220 #else
221 #define DISAS_INSN(name) \
222 static void disas_##name(CPUM68KState *env, DisasContext *s, \
223 uint16_t insn)
224 #endif
225
226 static const uint8_t cc_op_live[CC_OP_NB] = {
227 [CC_OP_FLAGS] = CCF_C | CCF_V | CCF_Z | CCF_N | CCF_X,
228 [CC_OP_ADDB ... CC_OP_ADDL] = CCF_X | CCF_N | CCF_V,
229 [CC_OP_SUBB ... CC_OP_SUBL] = CCF_X | CCF_N | CCF_V,
230 [CC_OP_CMPB ... CC_OP_CMPL] = CCF_X | CCF_N | CCF_V,
231 [CC_OP_LOGIC] = CCF_X | CCF_N
232 };
233
234 static void set_cc_op(DisasContext *s, CCOp op)
235 {
236 CCOp old_op = s->cc_op;
237 int dead;
238
239 if (old_op == op) {
240 return;
241 }
242 s->cc_op = op;
243 s->cc_op_synced = 0;
244
245 /* Discard CC computation that will no longer be used.
246 Note that X and N are never dead. */
247 dead = cc_op_live[old_op] & ~cc_op_live[op];
248 if (dead & CCF_C) {
249 tcg_gen_discard_i32(QREG_CC_C);
250 }
251 if (dead & CCF_Z) {
252 tcg_gen_discard_i32(QREG_CC_Z);
253 }
254 if (dead & CCF_V) {
255 tcg_gen_discard_i32(QREG_CC_V);
256 }
257 }
258
259 /* Update the CPU env CC_OP state. */
260 static void update_cc_op(DisasContext *s)
261 {
262 if (!s->cc_op_synced) {
263 s->cc_op_synced = 1;
264 tcg_gen_movi_i32(QREG_CC_OP, s->cc_op);
265 }
266 }
267
268 /* Generate a load from the specified address. Narrow values are
269 sign extended to full register width. */
270 static inline TCGv gen_load(DisasContext * s, int opsize, TCGv addr, int sign)
271 {
272 TCGv tmp;
273 int index = IS_USER(s);
274 tmp = tcg_temp_new_i32();
275 switch(opsize) {
276 case OS_BYTE:
277 if (sign)
278 tcg_gen_qemu_ld8s(tmp, addr, index);
279 else
280 tcg_gen_qemu_ld8u(tmp, addr, index);
281 break;
282 case OS_WORD:
283 if (sign)
284 tcg_gen_qemu_ld16s(tmp, addr, index);
285 else
286 tcg_gen_qemu_ld16u(tmp, addr, index);
287 break;
288 case OS_LONG:
289 case OS_SINGLE:
290 tcg_gen_qemu_ld32u(tmp, addr, index);
291 break;
292 default:
293 g_assert_not_reached();
294 }
295 gen_throws_exception = gen_last_qop;
296 return tmp;
297 }
298
299 static inline TCGv_i64 gen_load64(DisasContext * s, TCGv addr)
300 {
301 TCGv_i64 tmp;
302 int index = IS_USER(s);
303 tmp = tcg_temp_new_i64();
304 tcg_gen_qemu_ldf64(tmp, addr, index);
305 gen_throws_exception = gen_last_qop;
306 return tmp;
307 }
308
309 /* Generate a store. */
310 static inline void gen_store(DisasContext *s, int opsize, TCGv addr, TCGv val)
311 {
312 int index = IS_USER(s);
313 switch(opsize) {
314 case OS_BYTE:
315 tcg_gen_qemu_st8(val, addr, index);
316 break;
317 case OS_WORD:
318 tcg_gen_qemu_st16(val, addr, index);
319 break;
320 case OS_LONG:
321 case OS_SINGLE:
322 tcg_gen_qemu_st32(val, addr, index);
323 break;
324 default:
325 g_assert_not_reached();
326 }
327 gen_throws_exception = gen_last_qop;
328 }
329
330 static inline void gen_store64(DisasContext *s, TCGv addr, TCGv_i64 val)
331 {
332 int index = IS_USER(s);
333 tcg_gen_qemu_stf64(val, addr, index);
334 gen_throws_exception = gen_last_qop;
335 }
336
337 typedef enum {
338 EA_STORE,
339 EA_LOADU,
340 EA_LOADS
341 } ea_what;
342
343 /* Generate an unsigned load if VAL is 0 a signed load if val is -1,
344 otherwise generate a store. */
345 static TCGv gen_ldst(DisasContext *s, int opsize, TCGv addr, TCGv val,
346 ea_what what)
347 {
348 if (what == EA_STORE) {
349 gen_store(s, opsize, addr, val);
350 return store_dummy;
351 } else {
352 return gen_load(s, opsize, addr, what == EA_LOADS);
353 }
354 }
355
356 /* Read a 16-bit immediate constant */
357 static inline uint16_t read_im16(CPUM68KState *env, DisasContext *s)
358 {
359 uint16_t im;
360 im = cpu_lduw_code(env, s->pc);
361 s->pc += 2;
362 return im;
363 }
364
365 /* Read an 8-bit immediate constant */
366 static inline uint8_t read_im8(CPUM68KState *env, DisasContext *s)
367 {
368 return read_im16(env, s);
369 }
370
371 /* Read a 32-bit immediate constant. */
372 static inline uint32_t read_im32(CPUM68KState *env, DisasContext *s)
373 {
374 uint32_t im;
375 im = read_im16(env, s) << 16;
376 im |= 0xffff & read_im16(env, s);
377 return im;
378 }
379
380 /* Calculate and address index. */
381 static TCGv gen_addr_index(DisasContext *s, uint16_t ext, TCGv tmp)
382 {
383 TCGv add;
384 int scale;
385
386 add = (ext & 0x8000) ? AREG(ext, 12) : DREG(ext, 12);
387 if ((ext & 0x800) == 0) {
388 tcg_gen_ext16s_i32(tmp, add);
389 add = tmp;
390 }
391 scale = (ext >> 9) & 3;
392 if (scale != 0) {
393 tcg_gen_shli_i32(tmp, add, scale);
394 add = tmp;
395 }
396 return add;
397 }
398
399 /* Handle a base + index + displacement effective addresss.
400 A NULL_QREG base means pc-relative. */
401 static TCGv gen_lea_indexed(CPUM68KState *env, DisasContext *s, TCGv base)
402 {
403 uint32_t offset;
404 uint16_t ext;
405 TCGv add;
406 TCGv tmp;
407 uint32_t bd, od;
408
409 offset = s->pc;
410 ext = read_im16(env, s);
411
412 if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX))
413 return NULL_QREG;
414
415 if (m68k_feature(s->env, M68K_FEATURE_M68000) &&
416 !m68k_feature(s->env, M68K_FEATURE_SCALED_INDEX)) {
417 ext &= ~(3 << 9);
418 }
419
420 if (ext & 0x100) {
421 /* full extension word format */
422 if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL))
423 return NULL_QREG;
424
425 if ((ext & 0x30) > 0x10) {
426 /* base displacement */
427 if ((ext & 0x30) == 0x20) {
428 bd = (int16_t)read_im16(env, s);
429 } else {
430 bd = read_im32(env, s);
431 }
432 } else {
433 bd = 0;
434 }
435 tmp = tcg_temp_new();
436 if ((ext & 0x44) == 0) {
437 /* pre-index */
438 add = gen_addr_index(s, ext, tmp);
439 } else {
440 add = NULL_QREG;
441 }
442 if ((ext & 0x80) == 0) {
443 /* base not suppressed */
444 if (IS_NULL_QREG(base)) {
445 base = tcg_const_i32(offset + bd);
446 bd = 0;
447 }
448 if (!IS_NULL_QREG(add)) {
449 tcg_gen_add_i32(tmp, add, base);
450 add = tmp;
451 } else {
452 add = base;
453 }
454 }
455 if (!IS_NULL_QREG(add)) {
456 if (bd != 0) {
457 tcg_gen_addi_i32(tmp, add, bd);
458 add = tmp;
459 }
460 } else {
461 add = tcg_const_i32(bd);
462 }
463 if ((ext & 3) != 0) {
464 /* memory indirect */
465 base = gen_load(s, OS_LONG, add, 0);
466 if ((ext & 0x44) == 4) {
467 add = gen_addr_index(s, ext, tmp);
468 tcg_gen_add_i32(tmp, add, base);
469 add = tmp;
470 } else {
471 add = base;
472 }
473 if ((ext & 3) > 1) {
474 /* outer displacement */
475 if ((ext & 3) == 2) {
476 od = (int16_t)read_im16(env, s);
477 } else {
478 od = read_im32(env, s);
479 }
480 } else {
481 od = 0;
482 }
483 if (od != 0) {
484 tcg_gen_addi_i32(tmp, add, od);
485 add = tmp;
486 }
487 }
488 } else {
489 /* brief extension word format */
490 tmp = tcg_temp_new();
491 add = gen_addr_index(s, ext, tmp);
492 if (!IS_NULL_QREG(base)) {
493 tcg_gen_add_i32(tmp, add, base);
494 if ((int8_t)ext)
495 tcg_gen_addi_i32(tmp, tmp, (int8_t)ext);
496 } else {
497 tcg_gen_addi_i32(tmp, add, offset + (int8_t)ext);
498 }
499 add = tmp;
500 }
501 return add;
502 }
503
504 /* Sign or zero extend a value. */
505
506 static inline void gen_ext(TCGv res, TCGv val, int opsize, int sign)
507 {
508 switch (opsize) {
509 case OS_BYTE:
510 if (sign) {
511 tcg_gen_ext8s_i32(res, val);
512 } else {
513 tcg_gen_ext8u_i32(res, val);
514 }
515 break;
516 case OS_WORD:
517 if (sign) {
518 tcg_gen_ext16s_i32(res, val);
519 } else {
520 tcg_gen_ext16u_i32(res, val);
521 }
522 break;
523 case OS_LONG:
524 tcg_gen_mov_i32(res, val);
525 break;
526 default:
527 g_assert_not_reached();
528 }
529 }
530
531 /* Evaluate all the CC flags. */
532
533 static void gen_flush_flags(DisasContext *s)
534 {
535 TCGv t0, t1;
536
537 switch (s->cc_op) {
538 case CC_OP_FLAGS:
539 return;
540
541 case CC_OP_ADDB:
542 case CC_OP_ADDW:
543 case CC_OP_ADDL:
544 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
545 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
546 /* Compute signed overflow for addition. */
547 t0 = tcg_temp_new();
548 t1 = tcg_temp_new();
549 tcg_gen_sub_i32(t0, QREG_CC_N, QREG_CC_V);
550 gen_ext(t0, t0, s->cc_op - CC_OP_ADDB, 1);
551 tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V);
552 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0);
553 tcg_temp_free(t0);
554 tcg_gen_andc_i32(QREG_CC_V, t1, QREG_CC_V);
555 tcg_temp_free(t1);
556 break;
557
558 case CC_OP_SUBB:
559 case CC_OP_SUBW:
560 case CC_OP_SUBL:
561 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
562 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
563 /* Compute signed overflow for subtraction. */
564 t0 = tcg_temp_new();
565 t1 = tcg_temp_new();
566 tcg_gen_add_i32(t0, QREG_CC_N, QREG_CC_V);
567 gen_ext(t0, t0, s->cc_op - CC_OP_SUBB, 1);
568 tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V);
569 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0);
570 tcg_temp_free(t0);
571 tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t1);
572 tcg_temp_free(t1);
573 break;
574
575 case CC_OP_CMPB:
576 case CC_OP_CMPW:
577 case CC_OP_CMPL:
578 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_C, QREG_CC_N, QREG_CC_V);
579 tcg_gen_sub_i32(QREG_CC_Z, QREG_CC_N, QREG_CC_V);
580 gen_ext(QREG_CC_Z, QREG_CC_Z, s->cc_op - CC_OP_CMPB, 1);
581 /* Compute signed overflow for subtraction. */
582 t0 = tcg_temp_new();
583 tcg_gen_xor_i32(t0, QREG_CC_Z, QREG_CC_N);
584 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, QREG_CC_N);
585 tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t0);
586 tcg_temp_free(t0);
587 tcg_gen_mov_i32(QREG_CC_N, QREG_CC_Z);
588 break;
589
590 case CC_OP_LOGIC:
591 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
592 tcg_gen_movi_i32(QREG_CC_C, 0);
593 tcg_gen_movi_i32(QREG_CC_V, 0);
594 break;
595
596 case CC_OP_DYNAMIC:
597 gen_helper_flush_flags(cpu_env, QREG_CC_OP);
598 s->cc_op_synced = 1;
599 break;
600
601 default:
602 t0 = tcg_const_i32(s->cc_op);
603 gen_helper_flush_flags(cpu_env, t0);
604 tcg_temp_free(t0);
605 s->cc_op_synced = 1;
606 break;
607 }
608
609 /* Note that flush_flags also assigned to env->cc_op. */
610 s->cc_op = CC_OP_FLAGS;
611 }
612
613 static inline TCGv gen_extend(TCGv val, int opsize, int sign)
614 {
615 TCGv tmp;
616
617 if (opsize == OS_LONG) {
618 tmp = val;
619 } else {
620 tmp = tcg_temp_new();
621 gen_ext(tmp, val, opsize, sign);
622 }
623
624 return tmp;
625 }
626
627 static void gen_logic_cc(DisasContext *s, TCGv val, int opsize)
628 {
629 gen_ext(QREG_CC_N, val, opsize, 1);
630 set_cc_op(s, CC_OP_LOGIC);
631 }
632
633 static void gen_update_cc_cmp(DisasContext *s, TCGv dest, TCGv src, int opsize)
634 {
635 tcg_gen_mov_i32(QREG_CC_N, dest);
636 tcg_gen_mov_i32(QREG_CC_V, src);
637 set_cc_op(s, CC_OP_CMPB + opsize);
638 }
639
640 static void gen_update_cc_add(TCGv dest, TCGv src, int opsize)
641 {
642 gen_ext(QREG_CC_N, dest, opsize, 1);
643 tcg_gen_mov_i32(QREG_CC_V, src);
644 }
645
646 static inline int opsize_bytes(int opsize)
647 {
648 switch (opsize) {
649 case OS_BYTE: return 1;
650 case OS_WORD: return 2;
651 case OS_LONG: return 4;
652 case OS_SINGLE: return 4;
653 case OS_DOUBLE: return 8;
654 case OS_EXTENDED: return 12;
655 case OS_PACKED: return 12;
656 default:
657 g_assert_not_reached();
658 }
659 }
660
661 static inline int insn_opsize(int insn)
662 {
663 switch ((insn >> 6) & 3) {
664 case 0: return OS_BYTE;
665 case 1: return OS_WORD;
666 case 2: return OS_LONG;
667 default:
668 g_assert_not_reached();
669 }
670 }
671
672 /* Assign value to a register. If the width is less than the register width
673 only the low part of the register is set. */
674 static void gen_partset_reg(int opsize, TCGv reg, TCGv val)
675 {
676 TCGv tmp;
677 switch (opsize) {
678 case OS_BYTE:
679 tcg_gen_andi_i32(reg, reg, 0xffffff00);
680 tmp = tcg_temp_new();
681 tcg_gen_ext8u_i32(tmp, val);
682 tcg_gen_or_i32(reg, reg, tmp);
683 tcg_temp_free(tmp);
684 break;
685 case OS_WORD:
686 tcg_gen_andi_i32(reg, reg, 0xffff0000);
687 tmp = tcg_temp_new();
688 tcg_gen_ext16u_i32(tmp, val);
689 tcg_gen_or_i32(reg, reg, tmp);
690 tcg_temp_free(tmp);
691 break;
692 case OS_LONG:
693 case OS_SINGLE:
694 tcg_gen_mov_i32(reg, val);
695 break;
696 default:
697 g_assert_not_reached();
698 }
699 }
700
701 /* Generate code for an "effective address". Does not adjust the base
702 register for autoincrement addressing modes. */
703 static TCGv gen_lea_mode(CPUM68KState *env, DisasContext *s,
704 int mode, int reg0, int opsize)
705 {
706 TCGv reg;
707 TCGv tmp;
708 uint16_t ext;
709 uint32_t offset;
710
711 switch (mode) {
712 case 0: /* Data register direct. */
713 case 1: /* Address register direct. */
714 return NULL_QREG;
715 case 3: /* Indirect postincrement. */
716 if (opsize == OS_UNSIZED) {
717 return NULL_QREG;
718 }
719 /* fallthru */
720 case 2: /* Indirect register */
721 return get_areg(s, reg0);
722 case 4: /* Indirect predecrememnt. */
723 if (opsize == OS_UNSIZED) {
724 return NULL_QREG;
725 }
726 reg = get_areg(s, reg0);
727 tmp = tcg_temp_new();
728 if (reg0 == 7 && opsize == OS_BYTE &&
729 m68k_feature(s->env, M68K_FEATURE_M68000)) {
730 tcg_gen_subi_i32(tmp, reg, 2);
731 } else {
732 tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize));
733 }
734 return tmp;
735 case 5: /* Indirect displacement. */
736 reg = get_areg(s, reg0);
737 tmp = tcg_temp_new();
738 ext = read_im16(env, s);
739 tcg_gen_addi_i32(tmp, reg, (int16_t)ext);
740 return tmp;
741 case 6: /* Indirect index + displacement. */
742 reg = get_areg(s, reg0);
743 return gen_lea_indexed(env, s, reg);
744 case 7: /* Other */
745 switch (reg0) {
746 case 0: /* Absolute short. */
747 offset = (int16_t)read_im16(env, s);
748 return tcg_const_i32(offset);
749 case 1: /* Absolute long. */
750 offset = read_im32(env, s);
751 return tcg_const_i32(offset);
752 case 2: /* pc displacement */
753 offset = s->pc;
754 offset += (int16_t)read_im16(env, s);
755 return tcg_const_i32(offset);
756 case 3: /* pc index+displacement. */
757 return gen_lea_indexed(env, s, NULL_QREG);
758 case 4: /* Immediate. */
759 default:
760 return NULL_QREG;
761 }
762 }
763 /* Should never happen. */
764 return NULL_QREG;
765 }
766
767 static TCGv gen_lea(CPUM68KState *env, DisasContext *s, uint16_t insn,
768 int opsize)
769 {
770 int mode = extract32(insn, 3, 3);
771 int reg0 = REG(insn, 0);
772 return gen_lea_mode(env, s, mode, reg0, opsize);
773 }
774
775 /* Generate code to load/store a value from/into an EA. If WHAT > 0 this is
776 a write otherwise it is a read (0 == sign extend, -1 == zero extend).
777 ADDRP is non-null for readwrite operands. */
778 static TCGv gen_ea_mode(CPUM68KState *env, DisasContext *s, int mode, int reg0,
779 int opsize, TCGv val, TCGv *addrp, ea_what what)
780 {
781 TCGv reg, tmp, result;
782 int32_t offset;
783
784 switch (mode) {
785 case 0: /* Data register direct. */
786 reg = cpu_dregs[reg0];
787 if (what == EA_STORE) {
788 gen_partset_reg(opsize, reg, val);
789 return store_dummy;
790 } else {
791 return gen_extend(reg, opsize, what == EA_LOADS);
792 }
793 case 1: /* Address register direct. */
794 reg = get_areg(s, reg0);
795 if (what == EA_STORE) {
796 tcg_gen_mov_i32(reg, val);
797 return store_dummy;
798 } else {
799 return gen_extend(reg, opsize, what == EA_LOADS);
800 }
801 case 2: /* Indirect register */
802 reg = get_areg(s, reg0);
803 return gen_ldst(s, opsize, reg, val, what);
804 case 3: /* Indirect postincrement. */
805 reg = get_areg(s, reg0);
806 result = gen_ldst(s, opsize, reg, val, what);
807 if (what == EA_STORE || !addrp) {
808 TCGv tmp = tcg_temp_new();
809 if (reg0 == 7 && opsize == OS_BYTE &&
810 m68k_feature(s->env, M68K_FEATURE_M68000)) {
811 tcg_gen_addi_i32(tmp, reg, 2);
812 } else {
813 tcg_gen_addi_i32(tmp, reg, opsize_bytes(opsize));
814 }
815 delay_set_areg(s, reg0, tmp, true);
816 }
817 return result;
818 case 4: /* Indirect predecrememnt. */
819 if (addrp && what == EA_STORE) {
820 tmp = *addrp;
821 } else {
822 tmp = gen_lea_mode(env, s, mode, reg0, opsize);
823 if (IS_NULL_QREG(tmp)) {
824 return tmp;
825 }
826 if (addrp) {
827 *addrp = tmp;
828 }
829 }
830 result = gen_ldst(s, opsize, tmp, val, what);
831 if (what == EA_STORE || !addrp) {
832 delay_set_areg(s, reg0, tmp, false);
833 }
834 return result;
835 case 5: /* Indirect displacement. */
836 case 6: /* Indirect index + displacement. */
837 do_indirect:
838 if (addrp && what == EA_STORE) {
839 tmp = *addrp;
840 } else {
841 tmp = gen_lea_mode(env, s, mode, reg0, opsize);
842 if (IS_NULL_QREG(tmp)) {
843 return tmp;
844 }
845 if (addrp) {
846 *addrp = tmp;
847 }
848 }
849 return gen_ldst(s, opsize, tmp, val, what);
850 case 7: /* Other */
851 switch (reg0) {
852 case 0: /* Absolute short. */
853 case 1: /* Absolute long. */
854 case 2: /* pc displacement */
855 case 3: /* pc index+displacement. */
856 goto do_indirect;
857 case 4: /* Immediate. */
858 /* Sign extend values for consistency. */
859 switch (opsize) {
860 case OS_BYTE:
861 if (what == EA_LOADS) {
862 offset = (int8_t)read_im8(env, s);
863 } else {
864 offset = read_im8(env, s);
865 }
866 break;
867 case OS_WORD:
868 if (what == EA_LOADS) {
869 offset = (int16_t)read_im16(env, s);
870 } else {
871 offset = read_im16(env, s);
872 }
873 break;
874 case OS_LONG:
875 offset = read_im32(env, s);
876 break;
877 default:
878 g_assert_not_reached();
879 }
880 return tcg_const_i32(offset);
881 default:
882 return NULL_QREG;
883 }
884 }
885 /* Should never happen. */
886 return NULL_QREG;
887 }
888
889 static TCGv gen_ea(CPUM68KState *env, DisasContext *s, uint16_t insn,
890 int opsize, TCGv val, TCGv *addrp, ea_what what)
891 {
892 int mode = extract32(insn, 3, 3);
893 int reg0 = REG(insn, 0);
894 return gen_ea_mode(env, s, mode, reg0, opsize, val, addrp, what);
895 }
896
897 typedef struct {
898 TCGCond tcond;
899 bool g1;
900 bool g2;
901 TCGv v1;
902 TCGv v2;
903 } DisasCompare;
904
905 static void gen_cc_cond(DisasCompare *c, DisasContext *s, int cond)
906 {
907 TCGv tmp, tmp2;
908 TCGCond tcond;
909 CCOp op = s->cc_op;
910
911 /* The CC_OP_CMP form can handle most normal comparisons directly. */
912 if (op == CC_OP_CMPB || op == CC_OP_CMPW || op == CC_OP_CMPL) {
913 c->g1 = c->g2 = 1;
914 c->v1 = QREG_CC_N;
915 c->v2 = QREG_CC_V;
916 switch (cond) {
917 case 2: /* HI */
918 case 3: /* LS */
919 tcond = TCG_COND_LEU;
920 goto done;
921 case 4: /* CC */
922 case 5: /* CS */
923 tcond = TCG_COND_LTU;
924 goto done;
925 case 6: /* NE */
926 case 7: /* EQ */
927 tcond = TCG_COND_EQ;
928 goto done;
929 case 10: /* PL */
930 case 11: /* MI */
931 c->g1 = c->g2 = 0;
932 c->v2 = tcg_const_i32(0);
933 c->v1 = tmp = tcg_temp_new();
934 tcg_gen_sub_i32(tmp, QREG_CC_N, QREG_CC_V);
935 gen_ext(tmp, tmp, op - CC_OP_CMPB, 1);
936 /* fallthru */
937 case 12: /* GE */
938 case 13: /* LT */
939 tcond = TCG_COND_LT;
940 goto done;
941 case 14: /* GT */
942 case 15: /* LE */
943 tcond = TCG_COND_LE;
944 goto done;
945 }
946 }
947
948 c->g1 = 1;
949 c->g2 = 0;
950 c->v2 = tcg_const_i32(0);
951
952 switch (cond) {
953 case 0: /* T */
954 case 1: /* F */
955 c->v1 = c->v2;
956 tcond = TCG_COND_NEVER;
957 goto done;
958 case 14: /* GT (!(Z || (N ^ V))) */
959 case 15: /* LE (Z || (N ^ V)) */
960 /* Logic operations clear V, which simplifies LE to (Z || N),
961 and since Z and N are co-located, this becomes a normal
962 comparison vs N. */
963 if (op == CC_OP_LOGIC) {
964 c->v1 = QREG_CC_N;
965 tcond = TCG_COND_LE;
966 goto done;
967 }
968 break;
969 case 12: /* GE (!(N ^ V)) */
970 case 13: /* LT (N ^ V) */
971 /* Logic operations clear V, which simplifies this to N. */
972 if (op != CC_OP_LOGIC) {
973 break;
974 }
975 /* fallthru */
976 case 10: /* PL (!N) */
977 case 11: /* MI (N) */
978 /* Several cases represent N normally. */
979 if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
980 op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL ||
981 op == CC_OP_LOGIC) {
982 c->v1 = QREG_CC_N;
983 tcond = TCG_COND_LT;
984 goto done;
985 }
986 break;
987 case 6: /* NE (!Z) */
988 case 7: /* EQ (Z) */
989 /* Some cases fold Z into N. */
990 if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
991 op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL ||
992 op == CC_OP_LOGIC) {
993 tcond = TCG_COND_EQ;
994 c->v1 = QREG_CC_N;
995 goto done;
996 }
997 break;
998 case 4: /* CC (!C) */
999 case 5: /* CS (C) */
1000 /* Some cases fold C into X. */
1001 if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
1002 op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL) {
1003 tcond = TCG_COND_NE;
1004 c->v1 = QREG_CC_X;
1005 goto done;
1006 }
1007 /* fallthru */
1008 case 8: /* VC (!V) */
1009 case 9: /* VS (V) */
1010 /* Logic operations clear V and C. */
1011 if (op == CC_OP_LOGIC) {
1012 tcond = TCG_COND_NEVER;
1013 c->v1 = c->v2;
1014 goto done;
1015 }
1016 break;
1017 }
1018
1019 /* Otherwise, flush flag state to CC_OP_FLAGS. */
1020 gen_flush_flags(s);
1021
1022 switch (cond) {
1023 case 0: /* T */
1024 case 1: /* F */
1025 default:
1026 /* Invalid, or handled above. */
1027 abort();
1028 case 2: /* HI (!C && !Z) -> !(C || Z)*/
1029 case 3: /* LS (C || Z) */
1030 c->v1 = tmp = tcg_temp_new();
1031 c->g1 = 0;
1032 tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2);
1033 tcg_gen_or_i32(tmp, tmp, QREG_CC_C);
1034 tcond = TCG_COND_NE;
1035 break;
1036 case 4: /* CC (!C) */
1037 case 5: /* CS (C) */
1038 c->v1 = QREG_CC_C;
1039 tcond = TCG_COND_NE;
1040 break;
1041 case 6: /* NE (!Z) */
1042 case 7: /* EQ (Z) */
1043 c->v1 = QREG_CC_Z;
1044 tcond = TCG_COND_EQ;
1045 break;
1046 case 8: /* VC (!V) */
1047 case 9: /* VS (V) */
1048 c->v1 = QREG_CC_V;
1049 tcond = TCG_COND_LT;
1050 break;
1051 case 10: /* PL (!N) */
1052 case 11: /* MI (N) */
1053 c->v1 = QREG_CC_N;
1054 tcond = TCG_COND_LT;
1055 break;
1056 case 12: /* GE (!(N ^ V)) */
1057 case 13: /* LT (N ^ V) */
1058 c->v1 = tmp = tcg_temp_new();
1059 c->g1 = 0;
1060 tcg_gen_xor_i32(tmp, QREG_CC_N, QREG_CC_V);
1061 tcond = TCG_COND_LT;
1062 break;
1063 case 14: /* GT (!(Z || (N ^ V))) */
1064 case 15: /* LE (Z || (N ^ V)) */
1065 c->v1 = tmp = tcg_temp_new();
1066 c->g1 = 0;
1067 tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2);
1068 tcg_gen_neg_i32(tmp, tmp);
1069 tmp2 = tcg_temp_new();
1070 tcg_gen_xor_i32(tmp2, QREG_CC_N, QREG_CC_V);
1071 tcg_gen_or_i32(tmp, tmp, tmp2);
1072 tcg_temp_free(tmp2);
1073 tcond = TCG_COND_LT;
1074 break;
1075 }
1076
1077 done:
1078 if ((cond & 1) == 0) {
1079 tcond = tcg_invert_cond(tcond);
1080 }
1081 c->tcond = tcond;
1082 }
1083
1084 static void free_cond(DisasCompare *c)
1085 {
1086 if (!c->g1) {
1087 tcg_temp_free(c->v1);
1088 }
1089 if (!c->g2) {
1090 tcg_temp_free(c->v2);
1091 }
1092 }
1093
1094 static void gen_jmpcc(DisasContext *s, int cond, TCGLabel *l1)
1095 {
1096 DisasCompare c;
1097
1098 gen_cc_cond(&c, s, cond);
1099 update_cc_op(s);
1100 tcg_gen_brcond_i32(c.tcond, c.v1, c.v2, l1);
1101 free_cond(&c);
1102 }
1103
1104 /* Force a TB lookup after an instruction that changes the CPU state. */
1105 static void gen_lookup_tb(DisasContext *s)
1106 {
1107 update_cc_op(s);
1108 tcg_gen_movi_i32(QREG_PC, s->pc);
1109 s->is_jmp = DISAS_UPDATE;
1110 }
1111
1112 /* Generate a jump to an immediate address. */
1113 static void gen_jmp_im(DisasContext *s, uint32_t dest)
1114 {
1115 update_cc_op(s);
1116 tcg_gen_movi_i32(QREG_PC, dest);
1117 s->is_jmp = DISAS_JUMP;
1118 }
1119
1120 /* Generate a jump to the address in qreg DEST. */
1121 static void gen_jmp(DisasContext *s, TCGv dest)
1122 {
1123 update_cc_op(s);
1124 tcg_gen_mov_i32(QREG_PC, dest);
1125 s->is_jmp = DISAS_JUMP;
1126 }
1127
1128 static void gen_raise_exception(int nr)
1129 {
1130 TCGv_i32 tmp = tcg_const_i32(nr);
1131
1132 gen_helper_raise_exception(cpu_env, tmp);
1133 tcg_temp_free_i32(tmp);
1134 }
1135
1136 static void gen_exception(DisasContext *s, uint32_t where, int nr)
1137 {
1138 update_cc_op(s);
1139 gen_jmp_im(s, where);
1140 gen_raise_exception(nr);
1141 }
1142
1143 static inline void gen_addr_fault(DisasContext *s)
1144 {
1145 gen_exception(s, s->insn_pc, EXCP_ADDRESS);
1146 }
1147
1148 #define SRC_EA(env, result, opsize, op_sign, addrp) do { \
1149 result = gen_ea(env, s, insn, opsize, NULL_QREG, addrp, \
1150 op_sign ? EA_LOADS : EA_LOADU); \
1151 if (IS_NULL_QREG(result)) { \
1152 gen_addr_fault(s); \
1153 return; \
1154 } \
1155 } while (0)
1156
1157 #define DEST_EA(env, insn, opsize, val, addrp) do { \
1158 TCGv ea_result = gen_ea(env, s, insn, opsize, val, addrp, EA_STORE); \
1159 if (IS_NULL_QREG(ea_result)) { \
1160 gen_addr_fault(s); \
1161 return; \
1162 } \
1163 } while (0)
1164
1165 static inline bool use_goto_tb(DisasContext *s, uint32_t dest)
1166 {
1167 #ifndef CONFIG_USER_ONLY
1168 return (s->tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) ||
1169 (s->insn_pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK);
1170 #else
1171 return true;
1172 #endif
1173 }
1174
1175 /* Generate a jump to an immediate address. */
1176 static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
1177 {
1178 if (unlikely(s->singlestep_enabled)) {
1179 gen_exception(s, dest, EXCP_DEBUG);
1180 } else if (use_goto_tb(s, dest)) {
1181 tcg_gen_goto_tb(n);
1182 tcg_gen_movi_i32(QREG_PC, dest);
1183 tcg_gen_exit_tb((uintptr_t)s->tb + n);
1184 } else {
1185 gen_jmp_im(s, dest);
1186 tcg_gen_exit_tb(0);
1187 }
1188 s->is_jmp = DISAS_TB_JUMP;
1189 }
1190
1191 DISAS_INSN(scc)
1192 {
1193 DisasCompare c;
1194 int cond;
1195 TCGv tmp;
1196
1197 cond = (insn >> 8) & 0xf;
1198 gen_cc_cond(&c, s, cond);
1199
1200 tmp = tcg_temp_new();
1201 tcg_gen_setcond_i32(c.tcond, tmp, c.v1, c.v2);
1202 free_cond(&c);
1203
1204 tcg_gen_neg_i32(tmp, tmp);
1205 DEST_EA(env, insn, OS_BYTE, tmp, NULL);
1206 tcg_temp_free(tmp);
1207 }
1208
1209 DISAS_INSN(dbcc)
1210 {
1211 TCGLabel *l1;
1212 TCGv reg;
1213 TCGv tmp;
1214 int16_t offset;
1215 uint32_t base;
1216
1217 reg = DREG(insn, 0);
1218 base = s->pc;
1219 offset = (int16_t)read_im16(env, s);
1220 l1 = gen_new_label();
1221 gen_jmpcc(s, (insn >> 8) & 0xf, l1);
1222
1223 tmp = tcg_temp_new();
1224 tcg_gen_ext16s_i32(tmp, reg);
1225 tcg_gen_addi_i32(tmp, tmp, -1);
1226 gen_partset_reg(OS_WORD, reg, tmp);
1227 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, -1, l1);
1228 gen_jmp_tb(s, 1, base + offset);
1229 gen_set_label(l1);
1230 gen_jmp_tb(s, 0, s->pc);
1231 }
1232
1233 DISAS_INSN(undef_mac)
1234 {
1235 gen_exception(s, s->pc - 2, EXCP_LINEA);
1236 }
1237
1238 DISAS_INSN(undef_fpu)
1239 {
1240 gen_exception(s, s->pc - 2, EXCP_LINEF);
1241 }
1242
1243 DISAS_INSN(undef)
1244 {
1245 /* ??? This is both instructions that are as yet unimplemented
1246 for the 680x0 series, as well as those that are implemented
1247 but actually illegal for CPU32 or pre-68020. */
1248 qemu_log_mask(LOG_UNIMP, "Illegal instruction: %04x @ %08x",
1249 insn, s->pc - 2);
1250 gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
1251 }
1252
1253 DISAS_INSN(mulw)
1254 {
1255 TCGv reg;
1256 TCGv tmp;
1257 TCGv src;
1258 int sign;
1259
1260 sign = (insn & 0x100) != 0;
1261 reg = DREG(insn, 9);
1262 tmp = tcg_temp_new();
1263 if (sign)
1264 tcg_gen_ext16s_i32(tmp, reg);
1265 else
1266 tcg_gen_ext16u_i32(tmp, reg);
1267 SRC_EA(env, src, OS_WORD, sign, NULL);
1268 tcg_gen_mul_i32(tmp, tmp, src);
1269 tcg_gen_mov_i32(reg, tmp);
1270 gen_logic_cc(s, tmp, OS_LONG);
1271 tcg_temp_free(tmp);
1272 }
1273
1274 DISAS_INSN(divw)
1275 {
1276 int sign;
1277 TCGv src;
1278 TCGv destr;
1279
1280 /* divX.w <EA>,Dn 32/16 -> 16r:16q */
1281
1282 sign = (insn & 0x100) != 0;
1283
1284 /* dest.l / src.w */
1285
1286 SRC_EA(env, src, OS_WORD, sign, NULL);
1287 destr = tcg_const_i32(REG(insn, 9));
1288 if (sign) {
1289 gen_helper_divsw(cpu_env, destr, src);
1290 } else {
1291 gen_helper_divuw(cpu_env, destr, src);
1292 }
1293 tcg_temp_free(destr);
1294
1295 set_cc_op(s, CC_OP_FLAGS);
1296 }
1297
1298 DISAS_INSN(divl)
1299 {
1300 TCGv num, reg, den;
1301 int sign;
1302 uint16_t ext;
1303
1304 ext = read_im16(env, s);
1305
1306 sign = (ext & 0x0800) != 0;
1307
1308 if (ext & 0x400) {
1309 if (!m68k_feature(s->env, M68K_FEATURE_QUAD_MULDIV)) {
1310 gen_exception(s, s->insn_pc, EXCP_ILLEGAL);
1311 return;
1312 }
1313
1314 /* divX.l <EA>, Dr:Dq 64/32 -> 32r:32q */
1315
1316 SRC_EA(env, den, OS_LONG, 0, NULL);
1317 num = tcg_const_i32(REG(ext, 12));
1318 reg = tcg_const_i32(REG(ext, 0));
1319 if (sign) {
1320 gen_helper_divsll(cpu_env, num, reg, den);
1321 } else {
1322 gen_helper_divull(cpu_env, num, reg, den);
1323 }
1324 tcg_temp_free(reg);
1325 tcg_temp_free(num);
1326 set_cc_op(s, CC_OP_FLAGS);
1327 return;
1328 }
1329
1330 /* divX.l <EA>, Dq 32/32 -> 32q */
1331 /* divXl.l <EA>, Dr:Dq 32/32 -> 32r:32q */
1332
1333 SRC_EA(env, den, OS_LONG, 0, NULL);
1334 num = tcg_const_i32(REG(ext, 12));
1335 reg = tcg_const_i32(REG(ext, 0));
1336 if (sign) {
1337 gen_helper_divsl(cpu_env, num, reg, den);
1338 } else {
1339 gen_helper_divul(cpu_env, num, reg, den);
1340 }
1341 tcg_temp_free(reg);
1342 tcg_temp_free(num);
1343
1344 set_cc_op(s, CC_OP_FLAGS);
1345 }
1346
1347 static void bcd_add(TCGv dest, TCGv src)
1348 {
1349 TCGv t0, t1;
1350
1351 /* dest10 = dest10 + src10 + X
1352 *
1353 * t1 = src
1354 * t2 = t1 + 0x066
1355 * t3 = t2 + dest + X
1356 * t4 = t2 ^ dest
1357 * t5 = t3 ^ t4
1358 * t6 = ~t5 & 0x110
1359 * t7 = (t6 >> 2) | (t6 >> 3)
1360 * return t3 - t7
1361 */
1362
1363 /* t1 = (src + 0x066) + dest + X
1364 * = result with some possible exceding 0x6
1365 */
1366
1367 t0 = tcg_const_i32(0x066);
1368 tcg_gen_add_i32(t0, t0, src);
1369
1370 t1 = tcg_temp_new();
1371 tcg_gen_add_i32(t1, t0, dest);
1372 tcg_gen_add_i32(t1, t1, QREG_CC_X);
1373
1374 /* we will remove exceding 0x6 where there is no carry */
1375
1376 /* t0 = (src + 0x0066) ^ dest
1377 * = t1 without carries
1378 */
1379
1380 tcg_gen_xor_i32(t0, t0, dest);
1381
1382 /* extract the carries
1383 * t0 = t0 ^ t1
1384 * = only the carries
1385 */
1386
1387 tcg_gen_xor_i32(t0, t0, t1);
1388
1389 /* generate 0x1 where there is no carry
1390 * and for each 0x10, generate a 0x6
1391 */
1392
1393 tcg_gen_shri_i32(t0, t0, 3);
1394 tcg_gen_not_i32(t0, t0);
1395 tcg_gen_andi_i32(t0, t0, 0x22);
1396 tcg_gen_add_i32(dest, t0, t0);
1397 tcg_gen_add_i32(dest, dest, t0);
1398 tcg_temp_free(t0);
1399
1400 /* remove the exceding 0x6
1401 * for digits that have not generated a carry
1402 */
1403
1404 tcg_gen_sub_i32(dest, t1, dest);
1405 tcg_temp_free(t1);
1406 }
1407
1408 static void bcd_sub(TCGv dest, TCGv src)
1409 {
1410 TCGv t0, t1, t2;
1411
1412 /* dest10 = dest10 - src10 - X
1413 * = bcd_add(dest + 1 - X, 0x199 - src)
1414 */
1415
1416 /* t0 = 0x066 + (0x199 - src) */
1417
1418 t0 = tcg_temp_new();
1419 tcg_gen_subfi_i32(t0, 0x1ff, src);
1420
1421 /* t1 = t0 + dest + 1 - X*/
1422
1423 t1 = tcg_temp_new();
1424 tcg_gen_add_i32(t1, t0, dest);
1425 tcg_gen_addi_i32(t1, t1, 1);
1426 tcg_gen_sub_i32(t1, t1, QREG_CC_X);
1427
1428 /* t2 = t0 ^ dest */
1429
1430 t2 = tcg_temp_new();
1431 tcg_gen_xor_i32(t2, t0, dest);
1432
1433 /* t0 = t1 ^ t2 */
1434
1435 tcg_gen_xor_i32(t0, t1, t2);
1436
1437 /* t2 = ~t0 & 0x110
1438 * t0 = (t2 >> 2) | (t2 >> 3)
1439 *
1440 * to fit on 8bit operands, changed in:
1441 *
1442 * t2 = ~(t0 >> 3) & 0x22
1443 * t0 = t2 + t2
1444 * t0 = t0 + t2
1445 */
1446
1447 tcg_gen_shri_i32(t2, t0, 3);
1448 tcg_gen_not_i32(t2, t2);
1449 tcg_gen_andi_i32(t2, t2, 0x22);
1450 tcg_gen_add_i32(t0, t2, t2);
1451 tcg_gen_add_i32(t0, t0, t2);
1452 tcg_temp_free(t2);
1453
1454 /* return t1 - t0 */
1455
1456 tcg_gen_sub_i32(dest, t1, t0);
1457 tcg_temp_free(t0);
1458 tcg_temp_free(t1);
1459 }
1460
1461 static void bcd_flags(TCGv val)
1462 {
1463 tcg_gen_andi_i32(QREG_CC_C, val, 0x0ff);
1464 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_C);
1465
1466 tcg_gen_shri_i32(QREG_CC_C, val, 8);
1467 tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
1468
1469 tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C);
1470 }
1471
1472 DISAS_INSN(abcd_reg)
1473 {
1474 TCGv src;
1475 TCGv dest;
1476
1477 gen_flush_flags(s); /* !Z is sticky */
1478
1479 src = gen_extend(DREG(insn, 0), OS_BYTE, 0);
1480 dest = gen_extend(DREG(insn, 9), OS_BYTE, 0);
1481 bcd_add(dest, src);
1482 gen_partset_reg(OS_BYTE, DREG(insn, 9), dest);
1483
1484 bcd_flags(dest);
1485 }
1486
1487 DISAS_INSN(abcd_mem)
1488 {
1489 TCGv src, dest, addr;
1490
1491 gen_flush_flags(s); /* !Z is sticky */
1492
1493 /* Indirect pre-decrement load (mode 4) */
1494
1495 src = gen_ea_mode(env, s, 4, REG(insn, 0), OS_BYTE,
1496 NULL_QREG, NULL, EA_LOADU);
1497 dest = gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE,
1498 NULL_QREG, &addr, EA_LOADU);
1499
1500 bcd_add(dest, src);
1501
1502 gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE, dest, &addr, EA_STORE);
1503
1504 bcd_flags(dest);
1505 }
1506
1507 DISAS_INSN(sbcd_reg)
1508 {
1509 TCGv src, dest;
1510
1511 gen_flush_flags(s); /* !Z is sticky */
1512
1513 src = gen_extend(DREG(insn, 0), OS_BYTE, 0);
1514 dest = gen_extend(DREG(insn, 9), OS_BYTE, 0);
1515
1516 bcd_sub(dest, src);
1517
1518 gen_partset_reg(OS_BYTE, DREG(insn, 9), dest);
1519
1520 bcd_flags(dest);
1521 }
1522
1523 DISAS_INSN(sbcd_mem)
1524 {
1525 TCGv src, dest, addr;
1526
1527 gen_flush_flags(s); /* !Z is sticky */
1528
1529 /* Indirect pre-decrement load (mode 4) */
1530
1531 src = gen_ea_mode(env, s, 4, REG(insn, 0), OS_BYTE,
1532 NULL_QREG, NULL, EA_LOADU);
1533 dest = gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE,
1534 NULL_QREG, &addr, EA_LOADU);
1535
1536 bcd_sub(dest, src);
1537
1538 gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE, dest, &addr, EA_STORE);
1539
1540 bcd_flags(dest);
1541 }
1542
1543 DISAS_INSN(nbcd)
1544 {
1545 TCGv src, dest;
1546 TCGv addr;
1547
1548 gen_flush_flags(s); /* !Z is sticky */
1549
1550 SRC_EA(env, src, OS_BYTE, 0, &addr);
1551
1552 dest = tcg_const_i32(0);
1553 bcd_sub(dest, src);
1554
1555 DEST_EA(env, insn, OS_BYTE, dest, &addr);
1556
1557 bcd_flags(dest);
1558
1559 tcg_temp_free(dest);
1560 }
1561
1562 DISAS_INSN(addsub)
1563 {
1564 TCGv reg;
1565 TCGv dest;
1566 TCGv src;
1567 TCGv tmp;
1568 TCGv addr;
1569 int add;
1570 int opsize;
1571
1572 add = (insn & 0x4000) != 0;
1573 opsize = insn_opsize(insn);
1574 reg = gen_extend(DREG(insn, 9), opsize, 1);
1575 dest = tcg_temp_new();
1576 if (insn & 0x100) {
1577 SRC_EA(env, tmp, opsize, 1, &addr);
1578 src = reg;
1579 } else {
1580 tmp = reg;
1581 SRC_EA(env, src, opsize, 1, NULL);
1582 }
1583 if (add) {
1584 tcg_gen_add_i32(dest, tmp, src);
1585 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, src);
1586 set_cc_op(s, CC_OP_ADDB + opsize);
1587 } else {
1588 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, tmp, src);
1589 tcg_gen_sub_i32(dest, tmp, src);
1590 set_cc_op(s, CC_OP_SUBB + opsize);
1591 }
1592 gen_update_cc_add(dest, src, opsize);
1593 if (insn & 0x100) {
1594 DEST_EA(env, insn, opsize, dest, &addr);
1595 } else {
1596 gen_partset_reg(opsize, DREG(insn, 9), dest);
1597 }
1598 tcg_temp_free(dest);
1599 }
1600
1601 /* Reverse the order of the bits in REG. */
1602 DISAS_INSN(bitrev)
1603 {
1604 TCGv reg;
1605 reg = DREG(insn, 0);
1606 gen_helper_bitrev(reg, reg);
1607 }
1608
1609 DISAS_INSN(bitop_reg)
1610 {
1611 int opsize;
1612 int op;
1613 TCGv src1;
1614 TCGv src2;
1615 TCGv tmp;
1616 TCGv addr;
1617 TCGv dest;
1618
1619 if ((insn & 0x38) != 0)
1620 opsize = OS_BYTE;
1621 else
1622 opsize = OS_LONG;
1623 op = (insn >> 6) & 3;
1624 SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
1625
1626 gen_flush_flags(s);
1627 src2 = tcg_temp_new();
1628 if (opsize == OS_BYTE)
1629 tcg_gen_andi_i32(src2, DREG(insn, 9), 7);
1630 else
1631 tcg_gen_andi_i32(src2, DREG(insn, 9), 31);
1632
1633 tmp = tcg_const_i32(1);
1634 tcg_gen_shl_i32(tmp, tmp, src2);
1635 tcg_temp_free(src2);
1636
1637 tcg_gen_and_i32(QREG_CC_Z, src1, tmp);
1638
1639 dest = tcg_temp_new();
1640 switch (op) {
1641 case 1: /* bchg */
1642 tcg_gen_xor_i32(dest, src1, tmp);
1643 break;
1644 case 2: /* bclr */
1645 tcg_gen_andc_i32(dest, src1, tmp);
1646 break;
1647 case 3: /* bset */
1648 tcg_gen_or_i32(dest, src1, tmp);
1649 break;
1650 default: /* btst */
1651 break;
1652 }
1653 tcg_temp_free(tmp);
1654 if (op) {
1655 DEST_EA(env, insn, opsize, dest, &addr);
1656 }
1657 tcg_temp_free(dest);
1658 }
1659
1660 DISAS_INSN(sats)
1661 {
1662 TCGv reg;
1663 reg = DREG(insn, 0);
1664 gen_flush_flags(s);
1665 gen_helper_sats(reg, reg, QREG_CC_V);
1666 gen_logic_cc(s, reg, OS_LONG);
1667 }
1668
1669 static void gen_push(DisasContext *s, TCGv val)
1670 {
1671 TCGv tmp;
1672
1673 tmp = tcg_temp_new();
1674 tcg_gen_subi_i32(tmp, QREG_SP, 4);
1675 gen_store(s, OS_LONG, tmp, val);
1676 tcg_gen_mov_i32(QREG_SP, tmp);
1677 tcg_temp_free(tmp);
1678 }
1679
1680 static TCGv mreg(int reg)
1681 {
1682 if (reg < 8) {
1683 /* Dx */
1684 return cpu_dregs[reg];
1685 }
1686 /* Ax */
1687 return cpu_aregs[reg & 7];
1688 }
1689
1690 DISAS_INSN(movem)
1691 {
1692 TCGv addr, incr, tmp, r[16];
1693 int is_load = (insn & 0x0400) != 0;
1694 int opsize = (insn & 0x40) != 0 ? OS_LONG : OS_WORD;
1695 uint16_t mask = read_im16(env, s);
1696 int mode = extract32(insn, 3, 3);
1697 int reg0 = REG(insn, 0);
1698 int i;
1699
1700 tmp = cpu_aregs[reg0];
1701
1702 switch (mode) {
1703 case 0: /* data register direct */
1704 case 1: /* addr register direct */
1705 do_addr_fault:
1706 gen_addr_fault(s);
1707 return;
1708
1709 case 2: /* indirect */
1710 break;
1711
1712 case 3: /* indirect post-increment */
1713 if (!is_load) {
1714 /* post-increment is not allowed */
1715 goto do_addr_fault;
1716 }
1717 break;
1718
1719 case 4: /* indirect pre-decrement */
1720 if (is_load) {
1721 /* pre-decrement is not allowed */
1722 goto do_addr_fault;
1723 }
1724 /* We want a bare copy of the address reg, without any pre-decrement
1725 adjustment, as gen_lea would provide. */
1726 break;
1727
1728 default:
1729 tmp = gen_lea_mode(env, s, mode, reg0, opsize);
1730 if (IS_NULL_QREG(tmp)) {
1731 goto do_addr_fault;
1732 }
1733 break;
1734 }
1735
1736 addr = tcg_temp_new();
1737 tcg_gen_mov_i32(addr, tmp);
1738 incr = tcg_const_i32(opsize_bytes(opsize));
1739
1740 if (is_load) {
1741 /* memory to register */
1742 for (i = 0; i < 16; i++) {
1743 if (mask & (1 << i)) {
1744 r[i] = gen_load(s, opsize, addr, 1);
1745 tcg_gen_add_i32(addr, addr, incr);
1746 }
1747 }
1748 for (i = 0; i < 16; i++) {
1749 if (mask & (1 << i)) {
1750 tcg_gen_mov_i32(mreg(i), r[i]);
1751 tcg_temp_free(r[i]);
1752 }
1753 }
1754 if (mode == 3) {
1755 /* post-increment: movem (An)+,X */
1756 tcg_gen_mov_i32(cpu_aregs[reg0], addr);
1757 }
1758 } else {
1759 /* register to memory */
1760 if (mode == 4) {
1761 /* pre-decrement: movem X,-(An) */
1762 for (i = 15; i >= 0; i--) {
1763 if ((mask << i) & 0x8000) {
1764 tcg_gen_sub_i32(addr, addr, incr);
1765 if (reg0 + 8 == i &&
1766 m68k_feature(s->env, M68K_FEATURE_EXT_FULL)) {
1767 /* M68020+: if the addressing register is the
1768 * register moved to memory, the value written
1769 * is the initial value decremented by the size of
1770 * the operation, regardless of how many actual
1771 * stores have been performed until this point.
1772 * M68000/M68010: the value is the initial value.
1773 */
1774 tmp = tcg_temp_new();
1775 tcg_gen_sub_i32(tmp, cpu_aregs[reg0], incr);
1776 gen_store(s, opsize, addr, tmp);
1777 tcg_temp_free(tmp);
1778 } else {
1779 gen_store(s, opsize, addr, mreg(i));
1780 }
1781 }
1782 }
1783 tcg_gen_mov_i32(cpu_aregs[reg0], addr);
1784 } else {
1785 for (i = 0; i < 16; i++) {
1786 if (mask & (1 << i)) {
1787 gen_store(s, opsize, addr, mreg(i));
1788 tcg_gen_add_i32(addr, addr, incr);
1789 }
1790 }
1791 }
1792 }
1793
1794 tcg_temp_free(incr);
1795 tcg_temp_free(addr);
1796 }
1797
1798 DISAS_INSN(bitop_im)
1799 {
1800 int opsize;
1801 int op;
1802 TCGv src1;
1803 uint32_t mask;
1804 int bitnum;
1805 TCGv tmp;
1806 TCGv addr;
1807
1808 if ((insn & 0x38) != 0)
1809 opsize = OS_BYTE;
1810 else
1811 opsize = OS_LONG;
1812 op = (insn >> 6) & 3;
1813
1814 bitnum = read_im16(env, s);
1815 if (m68k_feature(s->env, M68K_FEATURE_M68000)) {
1816 if (bitnum & 0xfe00) {
1817 disas_undef(env, s, insn);
1818 return;
1819 }
1820 } else {
1821 if (bitnum & 0xff00) {
1822 disas_undef(env, s, insn);
1823 return;
1824 }
1825 }
1826
1827 SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
1828
1829 gen_flush_flags(s);
1830 if (opsize == OS_BYTE)
1831 bitnum &= 7;
1832 else
1833 bitnum &= 31;
1834 mask = 1 << bitnum;
1835
1836 tcg_gen_andi_i32(QREG_CC_Z, src1, mask);
1837
1838 if (op) {
1839 tmp = tcg_temp_new();
1840 switch (op) {
1841 case 1: /* bchg */
1842 tcg_gen_xori_i32(tmp, src1, mask);
1843 break;
1844 case 2: /* bclr */
1845 tcg_gen_andi_i32(tmp, src1, ~mask);
1846 break;
1847 case 3: /* bset */
1848 tcg_gen_ori_i32(tmp, src1, mask);
1849 break;
1850 default: /* btst */
1851 break;
1852 }
1853 DEST_EA(env, insn, opsize, tmp, &addr);
1854 tcg_temp_free(tmp);
1855 }
1856 }
1857
1858 DISAS_INSN(arith_im)
1859 {
1860 int op;
1861 TCGv im;
1862 TCGv src1;
1863 TCGv dest;
1864 TCGv addr;
1865 int opsize;
1866
1867 op = (insn >> 9) & 7;
1868 opsize = insn_opsize(insn);
1869 switch (opsize) {
1870 case OS_BYTE:
1871 im = tcg_const_i32((int8_t)read_im8(env, s));
1872 break;
1873 case OS_WORD:
1874 im = tcg_const_i32((int16_t)read_im16(env, s));
1875 break;
1876 case OS_LONG:
1877 im = tcg_const_i32(read_im32(env, s));
1878 break;
1879 default:
1880 abort();
1881 }
1882 SRC_EA(env, src1, opsize, 1, (op == 6) ? NULL : &addr);
1883 dest = tcg_temp_new();
1884 switch (op) {
1885 case 0: /* ori */
1886 tcg_gen_or_i32(dest, src1, im);
1887 gen_logic_cc(s, dest, opsize);
1888 break;
1889 case 1: /* andi */
1890 tcg_gen_and_i32(dest, src1, im);
1891 gen_logic_cc(s, dest, opsize);
1892 break;
1893 case 2: /* subi */
1894 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, src1, im);
1895 tcg_gen_sub_i32(dest, src1, im);
1896 gen_update_cc_add(dest, im, opsize);
1897 set_cc_op(s, CC_OP_SUBB + opsize);
1898 break;
1899 case 3: /* addi */
1900 tcg_gen_add_i32(dest, src1, im);
1901 gen_update_cc_add(dest, im, opsize);
1902 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, im);
1903 set_cc_op(s, CC_OP_ADDB + opsize);
1904 break;
1905 case 5: /* eori */
1906 tcg_gen_xor_i32(dest, src1, im);
1907 gen_logic_cc(s, dest, opsize);
1908 break;
1909 case 6: /* cmpi */
1910 gen_update_cc_cmp(s, src1, im, opsize);
1911 break;
1912 default:
1913 abort();
1914 }
1915 tcg_temp_free(im);
1916 if (op != 6) {
1917 DEST_EA(env, insn, opsize, dest, &addr);
1918 }
1919 tcg_temp_free(dest);
1920 }
1921
1922 DISAS_INSN(cas)
1923 {
1924 int opsize;
1925 TCGv addr;
1926 uint16_t ext;
1927 TCGv load;
1928 TCGv cmp;
1929 TCGMemOp opc;
1930
1931 switch ((insn >> 9) & 3) {
1932 case 1:
1933 opsize = OS_BYTE;
1934 opc = MO_SB;
1935 break;
1936 case 2:
1937 opsize = OS_WORD;
1938 opc = MO_TESW;
1939 break;
1940 case 3:
1941 opsize = OS_LONG;
1942 opc = MO_TESL;
1943 break;
1944 default:
1945 g_assert_not_reached();
1946 }
1947
1948 ext = read_im16(env, s);
1949
1950 /* cas Dc,Du,<EA> */
1951
1952 addr = gen_lea(env, s, insn, opsize);
1953 if (IS_NULL_QREG(addr)) {
1954 gen_addr_fault(s);
1955 return;
1956 }
1957
1958 cmp = gen_extend(DREG(ext, 0), opsize, 1);
1959
1960 /* if <EA> == Dc then
1961 * <EA> = Du
1962 * Dc = <EA> (because <EA> == Dc)
1963 * else
1964 * Dc = <EA>
1965 */
1966
1967 load = tcg_temp_new();
1968 tcg_gen_atomic_cmpxchg_i32(load, addr, cmp, DREG(ext, 6),
1969 IS_USER(s), opc);
1970 /* update flags before setting cmp to load */
1971 gen_update_cc_cmp(s, load, cmp, opsize);
1972 gen_partset_reg(opsize, DREG(ext, 0), load);
1973
1974 tcg_temp_free(load);
1975
1976 switch (extract32(insn, 3, 3)) {
1977 case 3: /* Indirect postincrement. */
1978 tcg_gen_addi_i32(AREG(insn, 0), addr, opsize_bytes(opsize));
1979 break;
1980 case 4: /* Indirect predecrememnt. */
1981 tcg_gen_mov_i32(AREG(insn, 0), addr);
1982 break;
1983 }
1984 }
1985
1986 DISAS_INSN(cas2w)
1987 {
1988 uint16_t ext1, ext2;
1989 TCGv addr1, addr2;
1990 TCGv regs;
1991
1992 /* cas2 Dc1:Dc2,Du1:Du2,(Rn1):(Rn2) */
1993
1994 ext1 = read_im16(env, s);
1995
1996 if (ext1 & 0x8000) {
1997 /* Address Register */
1998 addr1 = AREG(ext1, 12);
1999 } else {
2000 /* Data Register */
2001 addr1 = DREG(ext1, 12);
2002 }
2003
2004 ext2 = read_im16(env, s);
2005 if (ext2 & 0x8000) {
2006 /* Address Register */
2007 addr2 = AREG(ext2, 12);
2008 } else {
2009 /* Data Register */
2010 addr2 = DREG(ext2, 12);
2011 }
2012
2013 /* if (R1) == Dc1 && (R2) == Dc2 then
2014 * (R1) = Du1
2015 * (R2) = Du2
2016 * else
2017 * Dc1 = (R1)
2018 * Dc2 = (R2)
2019 */
2020
2021 regs = tcg_const_i32(REG(ext2, 6) |
2022 (REG(ext1, 6) << 3) |
2023 (REG(ext2, 0) << 6) |
2024 (REG(ext1, 0) << 9));
2025 gen_helper_cas2w(cpu_env, regs, addr1, addr2);
2026 tcg_temp_free(regs);
2027
2028 /* Note that cas2w also assigned to env->cc_op. */
2029 s->cc_op = CC_OP_CMPW;
2030 s->cc_op_synced = 1;
2031 }
2032
2033 DISAS_INSN(cas2l)
2034 {
2035 uint16_t ext1, ext2;
2036 TCGv addr1, addr2, regs;
2037
2038 /* cas2 Dc1:Dc2,Du1:Du2,(Rn1):(Rn2) */
2039
2040 ext1 = read_im16(env, s);
2041
2042 if (ext1 & 0x8000) {
2043 /* Address Register */
2044 addr1 = AREG(ext1, 12);
2045 } else {
2046 /* Data Register */
2047 addr1 = DREG(ext1, 12);
2048 }
2049
2050 ext2 = read_im16(env, s);
2051 if (ext2 & 0x8000) {
2052 /* Address Register */
2053 addr2 = AREG(ext2, 12);
2054 } else {
2055 /* Data Register */
2056 addr2 = DREG(ext2, 12);
2057 }
2058
2059 /* if (R1) == Dc1 && (R2) == Dc2 then
2060 * (R1) = Du1
2061 * (R2) = Du2
2062 * else
2063 * Dc1 = (R1)
2064 * Dc2 = (R2)
2065 */
2066
2067 regs = tcg_const_i32(REG(ext2, 6) |
2068 (REG(ext1, 6) << 3) |
2069 (REG(ext2, 0) << 6) |
2070 (REG(ext1, 0) << 9));
2071 gen_helper_cas2l(cpu_env, regs, addr1, addr2);
2072 tcg_temp_free(regs);
2073
2074 /* Note that cas2l also assigned to env->cc_op. */
2075 s->cc_op = CC_OP_CMPL;
2076 s->cc_op_synced = 1;
2077 }
2078
2079 DISAS_INSN(byterev)
2080 {
2081 TCGv reg;
2082
2083 reg = DREG(insn, 0);
2084 tcg_gen_bswap32_i32(reg, reg);
2085 }
2086
2087 DISAS_INSN(move)
2088 {
2089 TCGv src;
2090 TCGv dest;
2091 int op;
2092 int opsize;
2093
2094 switch (insn >> 12) {
2095 case 1: /* move.b */
2096 opsize = OS_BYTE;
2097 break;
2098 case 2: /* move.l */
2099 opsize = OS_LONG;
2100 break;
2101 case 3: /* move.w */
2102 opsize = OS_WORD;
2103 break;
2104 default:
2105 abort();
2106 }
2107 SRC_EA(env, src, opsize, 1, NULL);
2108 op = (insn >> 6) & 7;
2109 if (op == 1) {
2110 /* movea */
2111 /* The value will already have been sign extended. */
2112 dest = AREG(insn, 9);
2113 tcg_gen_mov_i32(dest, src);
2114 } else {
2115 /* normal move */
2116 uint16_t dest_ea;
2117 dest_ea = ((insn >> 9) & 7) | (op << 3);
2118 DEST_EA(env, dest_ea, opsize, src, NULL);
2119 /* This will be correct because loads sign extend. */
2120 gen_logic_cc(s, src, opsize);
2121 }
2122 }
2123
2124 DISAS_INSN(negx)
2125 {
2126 TCGv z;
2127 TCGv src;
2128 TCGv addr;
2129 int opsize;
2130
2131 opsize = insn_opsize(insn);
2132 SRC_EA(env, src, opsize, 1, &addr);
2133
2134 gen_flush_flags(s); /* compute old Z */
2135
2136 /* Perform substract with borrow.
2137 * (X, N) = -(src + X);
2138 */
2139
2140 z = tcg_const_i32(0);
2141 tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, z, QREG_CC_X, z);
2142 tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, z, z, QREG_CC_N, QREG_CC_X);
2143 tcg_temp_free(z);
2144 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
2145
2146 tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1);
2147
2148 /* Compute signed-overflow for negation. The normal formula for
2149 * subtraction is (res ^ src) & (src ^ dest), but with dest==0
2150 * this simplies to res & src.
2151 */
2152
2153 tcg_gen_and_i32(QREG_CC_V, QREG_CC_N, src);
2154
2155 /* Copy the rest of the results into place. */
2156 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
2157 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
2158
2159 set_cc_op(s, CC_OP_FLAGS);
2160
2161 /* result is in QREG_CC_N */
2162
2163 DEST_EA(env, insn, opsize, QREG_CC_N, &addr);
2164 }
2165
2166 DISAS_INSN(lea)
2167 {
2168 TCGv reg;
2169 TCGv tmp;
2170
2171 reg = AREG(insn, 9);
2172 tmp = gen_lea(env, s, insn, OS_LONG);
2173 if (IS_NULL_QREG(tmp)) {
2174 gen_addr_fault(s);
2175 return;
2176 }
2177 tcg_gen_mov_i32(reg, tmp);
2178 }
2179
2180 DISAS_INSN(clr)
2181 {
2182 int opsize;
2183 TCGv zero;
2184
2185 zero = tcg_const_i32(0);
2186
2187 opsize = insn_opsize(insn);
2188 DEST_EA(env, insn, opsize, zero, NULL);
2189 gen_logic_cc(s, zero, opsize);
2190 tcg_temp_free(zero);
2191 }
2192
2193 static TCGv gen_get_ccr(DisasContext *s)
2194 {
2195 TCGv dest;
2196
2197 gen_flush_flags(s);
2198 update_cc_op(s);
2199 dest = tcg_temp_new();
2200 gen_helper_get_ccr(dest, cpu_env);
2201 return dest;
2202 }
2203
2204 DISAS_INSN(move_from_ccr)
2205 {
2206 TCGv ccr;
2207
2208 ccr = gen_get_ccr(s);
2209 DEST_EA(env, insn, OS_WORD, ccr, NULL);
2210 }
2211
2212 DISAS_INSN(neg)
2213 {
2214 TCGv src1;
2215 TCGv dest;
2216 TCGv addr;
2217 int opsize;
2218
2219 opsize = insn_opsize(insn);
2220 SRC_EA(env, src1, opsize, 1, &addr);
2221 dest = tcg_temp_new();
2222 tcg_gen_neg_i32(dest, src1);
2223 set_cc_op(s, CC_OP_SUBB + opsize);
2224 gen_update_cc_add(dest, src1, opsize);
2225 tcg_gen_setcondi_i32(TCG_COND_NE, QREG_CC_X, dest, 0);
2226 DEST_EA(env, insn, opsize, dest, &addr);
2227 tcg_temp_free(dest);
2228 }
2229
2230 static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
2231 {
2232 if (ccr_only) {
2233 tcg_gen_movi_i32(QREG_CC_C, val & CCF_C ? 1 : 0);
2234 tcg_gen_movi_i32(QREG_CC_V, val & CCF_V ? -1 : 0);
2235 tcg_gen_movi_i32(QREG_CC_Z, val & CCF_Z ? 0 : 1);
2236 tcg_gen_movi_i32(QREG_CC_N, val & CCF_N ? -1 : 0);
2237 tcg_gen_movi_i32(QREG_CC_X, val & CCF_X ? 1 : 0);
2238 } else {
2239 gen_helper_set_sr(cpu_env, tcg_const_i32(val));
2240 }
2241 set_cc_op(s, CC_OP_FLAGS);
2242 }
2243
2244 static void gen_set_sr(CPUM68KState *env, DisasContext *s, uint16_t insn,
2245 int ccr_only)
2246 {
2247 if ((insn & 0x38) == 0) {
2248 if (ccr_only) {
2249 gen_helper_set_ccr(cpu_env, DREG(insn, 0));
2250 } else {
2251 gen_helper_set_sr(cpu_env, DREG(insn, 0));
2252 }
2253 set_cc_op(s, CC_OP_FLAGS);
2254 } else if ((insn & 0x3f) == 0x3c) {
2255 uint16_t val;
2256 val = read_im16(env, s);
2257 gen_set_sr_im(s, val, ccr_only);
2258 } else {
2259 disas_undef(env, s, insn);
2260 }
2261 }
2262
2263
2264 DISAS_INSN(move_to_ccr)
2265 {
2266 gen_set_sr(env, s, insn, 1);
2267 }
2268
2269 DISAS_INSN(not)
2270 {
2271 TCGv src1;
2272 TCGv dest;
2273 TCGv addr;
2274 int opsize;
2275
2276 opsize = insn_opsize(insn);
2277 SRC_EA(env, src1, opsize, 1, &addr);
2278 dest = tcg_temp_new();
2279 tcg_gen_not_i32(dest, src1);
2280 DEST_EA(env, insn, opsize, dest, &addr);
2281 gen_logic_cc(s, dest, opsize);
2282 }
2283
2284 DISAS_INSN(swap)
2285 {
2286 TCGv src1;
2287 TCGv src2;
2288 TCGv reg;
2289
2290 src1 = tcg_temp_new();
2291 src2 = tcg_temp_new();
2292 reg = DREG(insn, 0);
2293 tcg_gen_shli_i32(src1, reg, 16);
2294 tcg_gen_shri_i32(src2, reg, 16);
2295 tcg_gen_or_i32(reg, src1, src2);
2296 tcg_temp_free(src2);
2297 tcg_temp_free(src1);
2298 gen_logic_cc(s, reg, OS_LONG);
2299 }
2300
2301 DISAS_INSN(bkpt)
2302 {
2303 gen_exception(s, s->pc - 2, EXCP_DEBUG);
2304 }
2305
2306 DISAS_INSN(pea)
2307 {
2308 TCGv tmp;
2309
2310 tmp = gen_lea(env, s, insn, OS_LONG);
2311 if (IS_NULL_QREG(tmp)) {
2312 gen_addr_fault(s);
2313 return;
2314 }
2315 gen_push(s, tmp);
2316 }
2317
2318 DISAS_INSN(ext)
2319 {
2320 int op;
2321 TCGv reg;
2322 TCGv tmp;
2323
2324 reg = DREG(insn, 0);
2325 op = (insn >> 6) & 7;
2326 tmp = tcg_temp_new();
2327 if (op == 3)
2328 tcg_gen_ext16s_i32(tmp, reg);
2329 else
2330 tcg_gen_ext8s_i32(tmp, reg);
2331 if (op == 2)
2332 gen_partset_reg(OS_WORD, reg, tmp);
2333 else
2334 tcg_gen_mov_i32(reg, tmp);
2335 gen_logic_cc(s, tmp, OS_LONG);
2336 tcg_temp_free(tmp);
2337 }
2338
2339 DISAS_INSN(tst)
2340 {
2341 int opsize;
2342 TCGv tmp;
2343
2344 opsize = insn_opsize(insn);
2345 SRC_EA(env, tmp, opsize, 1, NULL);
2346 gen_logic_cc(s, tmp, opsize);
2347 }
2348
2349 DISAS_INSN(pulse)
2350 {
2351 /* Implemented as a NOP. */
2352 }
2353
2354 DISAS_INSN(illegal)
2355 {
2356 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
2357 }
2358
2359 /* ??? This should be atomic. */
2360 DISAS_INSN(tas)
2361 {
2362 TCGv dest;
2363 TCGv src1;
2364 TCGv addr;
2365
2366 dest = tcg_temp_new();
2367 SRC_EA(env, src1, OS_BYTE, 1, &addr);
2368 gen_logic_cc(s, src1, OS_BYTE);
2369 tcg_gen_ori_i32(dest, src1, 0x80);
2370 DEST_EA(env, insn, OS_BYTE, dest, &addr);
2371 tcg_temp_free(dest);
2372 }
2373
2374 DISAS_INSN(mull)
2375 {
2376 uint16_t ext;
2377 TCGv src1;
2378 int sign;
2379
2380 ext = read_im16(env, s);
2381
2382 sign = ext & 0x800;
2383
2384 if (ext & 0x400) {
2385 if (!m68k_feature(s->env, M68K_FEATURE_QUAD_MULDIV)) {
2386 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
2387 return;
2388 }
2389
2390 SRC_EA(env, src1, OS_LONG, 0, NULL);
2391
2392 if (sign) {
2393 tcg_gen_muls2_i32(QREG_CC_Z, QREG_CC_N, src1, DREG(ext, 12));
2394 } else {
2395 tcg_gen_mulu2_i32(QREG_CC_Z, QREG_CC_N, src1, DREG(ext, 12));
2396 }
2397 /* if Dl == Dh, 68040 returns low word */
2398 tcg_gen_mov_i32(DREG(ext, 0), QREG_CC_N);
2399 tcg_gen_mov_i32(DREG(ext, 12), QREG_CC_Z);
2400 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N);
2401
2402 tcg_gen_movi_i32(QREG_CC_V, 0);
2403 tcg_gen_movi_i32(QREG_CC_C, 0);
2404
2405 set_cc_op(s, CC_OP_FLAGS);
2406 return;
2407 }
2408 SRC_EA(env, src1, OS_LONG, 0, NULL);
2409 if (m68k_feature(s->env, M68K_FEATURE_M68000)) {
2410 tcg_gen_movi_i32(QREG_CC_C, 0);
2411 if (sign) {
2412 tcg_gen_muls2_i32(QREG_CC_N, QREG_CC_V, src1, DREG(ext, 12));
2413 /* QREG_CC_V is -(QREG_CC_V != (QREG_CC_N >> 31)) */
2414 tcg_gen_sari_i32(QREG_CC_Z, QREG_CC_N, 31);
2415 tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, QREG_CC_Z);
2416 } else {
2417 tcg_gen_mulu2_i32(QREG_CC_N, QREG_CC_V, src1, DREG(ext, 12));
2418 /* QREG_CC_V is -(QREG_CC_V != 0), use QREG_CC_C as 0 */
2419 tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, QREG_CC_C);
2420 }
2421 tcg_gen_neg_i32(QREG_CC_V, QREG_CC_V);
2422 tcg_gen_mov_i32(DREG(ext, 12), QREG_CC_N);
2423
2424 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
2425
2426 set_cc_op(s, CC_OP_FLAGS);
2427 } else {
2428 /* The upper 32 bits of the product are discarded, so
2429 muls.l and mulu.l are functionally equivalent. */
2430 tcg_gen_mul_i32(DREG(ext, 12), src1, DREG(ext, 12));
2431 gen_logic_cc(s, DREG(ext, 12), OS_LONG);
2432 }
2433 }
2434
2435 static void gen_link(DisasContext *s, uint16_t insn, int32_t offset)
2436 {
2437 TCGv reg;
2438 TCGv tmp;
2439
2440 reg = AREG(insn, 0);
2441 tmp = tcg_temp_new();
2442 tcg_gen_subi_i32(tmp, QREG_SP, 4);
2443 gen_store(s, OS_LONG, tmp, reg);
2444 if ((insn & 7) != 7) {
2445 tcg_gen_mov_i32(reg, tmp);
2446 }
2447 tcg_gen_addi_i32(QREG_SP, tmp, offset);
2448 tcg_temp_free(tmp);
2449 }
2450
2451 DISAS_INSN(link)
2452 {
2453 int16_t offset;
2454
2455 offset = read_im16(env, s);
2456 gen_link(s, insn, offset);
2457 }
2458
2459 DISAS_INSN(linkl)
2460 {
2461 int32_t offset;
2462
2463 offset = read_im32(env, s);
2464 gen_link(s, insn, offset);
2465 }
2466
2467 DISAS_INSN(unlk)
2468 {
2469 TCGv src;
2470 TCGv reg;
2471 TCGv tmp;
2472
2473 src = tcg_temp_new();
2474 reg = AREG(insn, 0);
2475 tcg_gen_mov_i32(src, reg);
2476 tmp = gen_load(s, OS_LONG, src, 0);
2477 tcg_gen_mov_i32(reg, tmp);
2478 tcg_gen_addi_i32(QREG_SP, src, 4);
2479 tcg_temp_free(src);
2480 }
2481
2482 DISAS_INSN(nop)
2483 {
2484 }
2485
2486 DISAS_INSN(rts)
2487 {
2488 TCGv tmp;
2489
2490 tmp = gen_load(s, OS_LONG, QREG_SP, 0);
2491 tcg_gen_addi_i32(QREG_SP, QREG_SP, 4);
2492 gen_jmp(s, tmp);
2493 }
2494
2495 DISAS_INSN(jump)
2496 {
2497 TCGv tmp;
2498
2499 /* Load the target address first to ensure correct exception
2500 behavior. */
2501 tmp = gen_lea(env, s, insn, OS_LONG);
2502 if (IS_NULL_QREG(tmp)) {
2503 gen_addr_fault(s);
2504 return;
2505 }
2506 if ((insn & 0x40) == 0) {
2507 /* jsr */
2508 gen_push(s, tcg_const_i32(s->pc));
2509 }
2510 gen_jmp(s, tmp);
2511 }
2512
2513 DISAS_INSN(addsubq)
2514 {
2515 TCGv src;
2516 TCGv dest;
2517 TCGv val;
2518 int imm;
2519 TCGv addr;
2520 int opsize;
2521
2522 if ((insn & 070) == 010) {
2523 /* Operation on address register is always long. */
2524 opsize = OS_LONG;
2525 } else {
2526 opsize = insn_opsize(insn);
2527 }
2528 SRC_EA(env, src, opsize, 1, &addr);
2529 imm = (insn >> 9) & 7;
2530 if (imm == 0) {
2531 imm = 8;
2532 }
2533 val = tcg_const_i32(imm);
2534 dest = tcg_temp_new();
2535 tcg_gen_mov_i32(dest, src);
2536 if ((insn & 0x38) == 0x08) {
2537 /* Don't update condition codes if the destination is an
2538 address register. */
2539 if (insn & 0x0100) {
2540 tcg_gen_sub_i32(dest, dest, val);
2541 } else {
2542 tcg_gen_add_i32(dest, dest, val);
2543 }
2544 } else {
2545 if (insn & 0x0100) {
2546 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val);
2547 tcg_gen_sub_i32(dest, dest, val);
2548 set_cc_op(s, CC_OP_SUBB + opsize);
2549 } else {
2550 tcg_gen_add_i32(dest, dest, val);
2551 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val);
2552 set_cc_op(s, CC_OP_ADDB + opsize);
2553 }
2554 gen_update_cc_add(dest, val, opsize);
2555 }
2556 tcg_temp_free(val);
2557 DEST_EA(env, insn, opsize, dest, &addr);
2558 tcg_temp_free(dest);
2559 }
2560
2561 DISAS_INSN(tpf)
2562 {
2563 switch (insn & 7) {
2564 case 2: /* One extension word. */
2565 s->pc += 2;
2566 break;
2567 case 3: /* Two extension words. */
2568 s->pc += 4;
2569 break;
2570 case 4: /* No extension words. */
2571 break;
2572 default:
2573 disas_undef(env, s, insn);
2574 }
2575 }
2576
2577 DISAS_INSN(branch)
2578 {
2579 int32_t offset;
2580 uint32_t base;
2581 int op;
2582 TCGLabel *l1;
2583
2584 base = s->pc;
2585 op = (insn >> 8) & 0xf;
2586 offset = (int8_t)insn;
2587 if (offset == 0) {
2588 offset = (int16_t)read_im16(env, s);
2589 } else if (offset == -1) {
2590 offset = read_im32(env, s);
2591 }
2592 if (op == 1) {
2593 /* bsr */
2594 gen_push(s, tcg_const_i32(s->pc));
2595 }
2596 if (op > 1) {
2597 /* Bcc */
2598 l1 = gen_new_label();
2599 gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
2600 gen_jmp_tb(s, 1, base + offset);
2601 gen_set_label(l1);
2602 gen_jmp_tb(s, 0, s->pc);
2603 } else {
2604 /* Unconditional branch. */
2605 gen_jmp_tb(s, 0, base + offset);
2606 }
2607 }
2608
2609 DISAS_INSN(moveq)
2610 {
2611 tcg_gen_movi_i32(DREG(insn, 9), (int8_t)insn);
2612 gen_logic_cc(s, DREG(insn, 9), OS_LONG);
2613 }
2614
2615 DISAS_INSN(mvzs)
2616 {
2617 int opsize;
2618 TCGv src;
2619 TCGv reg;
2620
2621 if (insn & 0x40)
2622 opsize = OS_WORD;
2623 else
2624 opsize = OS_BYTE;
2625 SRC_EA(env, src, opsize, (insn & 0x80) == 0, NULL);
2626 reg = DREG(insn, 9);
2627 tcg_gen_mov_i32(reg, src);
2628 gen_logic_cc(s, src, opsize);
2629 }
2630
2631 DISAS_INSN(or)
2632 {
2633 TCGv reg;
2634 TCGv dest;
2635 TCGv src;
2636 TCGv addr;
2637 int opsize;
2638
2639 opsize = insn_opsize(insn);
2640 reg = gen_extend(DREG(insn, 9), opsize, 0);
2641 dest = tcg_temp_new();
2642 if (insn & 0x100) {
2643 SRC_EA(env, src, opsize, 0, &addr);
2644 tcg_gen_or_i32(dest, src, reg);
2645 DEST_EA(env, insn, opsize, dest, &addr);
2646 } else {
2647 SRC_EA(env, src, opsize, 0, NULL);
2648 tcg_gen_or_i32(dest, src, reg);
2649 gen_partset_reg(opsize, DREG(insn, 9), dest);
2650 }
2651 gen_logic_cc(s, dest, opsize);
2652 tcg_temp_free(dest);
2653 }
2654
2655 DISAS_INSN(suba)
2656 {
2657 TCGv src;
2658 TCGv reg;
2659
2660 SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL);
2661 reg = AREG(insn, 9);
2662 tcg_gen_sub_i32(reg, reg, src);
2663 }
2664
2665 static inline void gen_subx(DisasContext *s, TCGv src, TCGv dest, int opsize)
2666 {
2667 TCGv tmp;
2668
2669 gen_flush_flags(s); /* compute old Z */
2670
2671 /* Perform substract with borrow.
2672 * (X, N) = dest - (src + X);
2673 */
2674
2675 tmp = tcg_const_i32(0);
2676 tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, tmp, QREG_CC_X, tmp);
2677 tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, dest, tmp, QREG_CC_N, QREG_CC_X);
2678 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
2679 tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1);
2680
2681 /* Compute signed-overflow for substract. */
2682
2683 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, dest);
2684 tcg_gen_xor_i32(tmp, dest, src);
2685 tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, tmp);
2686 tcg_temp_free(tmp);
2687
2688 /* Copy the rest of the results into place. */
2689 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
2690 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
2691
2692 set_cc_op(s, CC_OP_FLAGS);
2693
2694 /* result is in QREG_CC_N */
2695 }
2696
2697 DISAS_INSN(subx_reg)
2698 {
2699 TCGv dest;
2700 TCGv src;
2701 int opsize;
2702
2703 opsize = insn_opsize(insn);
2704
2705 src = gen_extend(DREG(insn, 0), opsize, 1);
2706 dest = gen_extend(DREG(insn, 9), opsize, 1);
2707
2708 gen_subx(s, src, dest, opsize);
2709
2710 gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N);
2711 }
2712
2713 DISAS_INSN(subx_mem)
2714 {
2715 TCGv src;
2716 TCGv addr_src;
2717 TCGv dest;
2718 TCGv addr_dest;
2719 int opsize;
2720
2721 opsize = insn_opsize(insn);
2722
2723 addr_src = AREG(insn, 0);
2724 tcg_gen_subi_i32(addr_src, addr_src, opsize);
2725 src = gen_load(s, opsize, addr_src, 1);
2726
2727 addr_dest = AREG(insn, 9);
2728 tcg_gen_subi_i32(addr_dest, addr_dest, opsize);
2729 dest = gen_load(s, opsize, addr_dest, 1);
2730
2731 gen_subx(s, src, dest, opsize);
2732
2733 gen_store(s, opsize, addr_dest, QREG_CC_N);
2734 }
2735
2736 DISAS_INSN(mov3q)
2737 {
2738 TCGv src;
2739 int val;
2740
2741 val = (insn >> 9) & 7;
2742 if (val == 0)
2743 val = -1;
2744 src = tcg_const_i32(val);
2745 gen_logic_cc(s, src, OS_LONG);
2746 DEST_EA(env, insn, OS_LONG, src, NULL);
2747 tcg_temp_free(src);
2748 }
2749
2750 DISAS_INSN(cmp)
2751 {
2752 TCGv src;
2753 TCGv reg;
2754 int opsize;
2755
2756 opsize = insn_opsize(insn);
2757 SRC_EA(env, src, opsize, 1, NULL);
2758 reg = gen_extend(DREG(insn, 9), opsize, 1);
2759 gen_update_cc_cmp(s, reg, src, opsize);
2760 }
2761
2762 DISAS_INSN(cmpa)
2763 {
2764 int opsize;
2765 TCGv src;
2766 TCGv reg;
2767
2768 if (insn & 0x100) {
2769 opsize = OS_LONG;
2770 } else {
2771 opsize = OS_WORD;
2772 }
2773 SRC_EA(env, src, opsize, 1, NULL);
2774 reg = AREG(insn, 9);
2775 gen_update_cc_cmp(s, reg, src, OS_LONG);
2776 }
2777
2778 DISAS_INSN(cmpm)
2779 {
2780 int opsize = insn_opsize(insn);
2781 TCGv src, dst;
2782
2783 /* Post-increment load (mode 3) from Ay. */
2784 src = gen_ea_mode(env, s, 3, REG(insn, 0), opsize,
2785 NULL_QREG, NULL, EA_LOADS);
2786 /* Post-increment load (mode 3) from Ax. */
2787 dst = gen_ea_mode(env, s, 3, REG(insn, 9), opsize,
2788 NULL_QREG, NULL, EA_LOADS);
2789
2790 gen_update_cc_cmp(s, dst, src, opsize);
2791 }
2792
2793 DISAS_INSN(eor)
2794 {
2795 TCGv src;
2796 TCGv dest;
2797 TCGv addr;
2798 int opsize;
2799
2800 opsize = insn_opsize(insn);
2801
2802 SRC_EA(env, src, opsize, 0, &addr);
2803 dest = tcg_temp_new();
2804 tcg_gen_xor_i32(dest, src, DREG(insn, 9));
2805 gen_logic_cc(s, dest, opsize);
2806 DEST_EA(env, insn, opsize, dest, &addr);
2807 tcg_temp_free(dest);
2808 }
2809
2810 static void do_exg(TCGv reg1, TCGv reg2)
2811 {
2812 TCGv temp = tcg_temp_new();
2813 tcg_gen_mov_i32(temp, reg1);
2814 tcg_gen_mov_i32(reg1, reg2);
2815 tcg_gen_mov_i32(reg2, temp);
2816 tcg_temp_free(temp);
2817 }
2818
2819 DISAS_INSN(exg_dd)
2820 {
2821 /* exchange Dx and Dy */
2822 do_exg(DREG(insn, 9), DREG(insn, 0));
2823 }
2824
2825 DISAS_INSN(exg_aa)
2826 {
2827 /* exchange Ax and Ay */
2828 do_exg(AREG(insn, 9), AREG(insn, 0));
2829 }
2830
2831 DISAS_INSN(exg_da)
2832 {
2833 /* exchange Dx and Ay */
2834 do_exg(DREG(insn, 9), AREG(insn, 0));
2835 }
2836
2837 DISAS_INSN(and)
2838 {
2839 TCGv src;
2840 TCGv reg;
2841 TCGv dest;
2842 TCGv addr;
2843 int opsize;
2844
2845 dest = tcg_temp_new();
2846
2847 opsize = insn_opsize(insn);
2848 reg = DREG(insn, 9);
2849 if (insn & 0x100) {
2850 SRC_EA(env, src, opsize, 0, &addr);
2851 tcg_gen_and_i32(dest, src, reg);
2852 DEST_EA(env, insn, opsize, dest, &addr);
2853 } else {
2854 SRC_EA(env, src, opsize, 0, NULL);
2855 tcg_gen_and_i32(dest, src, reg);
2856 gen_partset_reg(opsize, reg, dest);
2857 }
2858 gen_logic_cc(s, dest, opsize);
2859 tcg_temp_free(dest);
2860 }
2861
2862 DISAS_INSN(adda)
2863 {
2864 TCGv src;
2865 TCGv reg;
2866
2867 SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL);
2868 reg = AREG(insn, 9);
2869 tcg_gen_add_i32(reg, reg, src);
2870 }
2871
2872 static inline void gen_addx(DisasContext *s, TCGv src, TCGv dest, int opsize)
2873 {
2874 TCGv tmp;
2875
2876 gen_flush_flags(s); /* compute old Z */
2877
2878 /* Perform addition with carry.
2879 * (X, N) = src + dest + X;
2880 */
2881
2882 tmp = tcg_const_i32(0);
2883 tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_X, tmp, dest, tmp);
2884 tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_N, QREG_CC_X, src, tmp);
2885 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
2886
2887 /* Compute signed-overflow for addition. */
2888
2889 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, src);
2890 tcg_gen_xor_i32(tmp, dest, src);
2891 tcg_gen_andc_i32(QREG_CC_V, QREG_CC_V, tmp);
2892 tcg_temp_free(tmp);
2893
2894 /* Copy the rest of the results into place. */
2895 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
2896 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
2897
2898 set_cc_op(s, CC_OP_FLAGS);
2899
2900 /* result is in QREG_CC_N */
2901 }
2902
2903 DISAS_INSN(addx_reg)
2904 {
2905 TCGv dest;
2906 TCGv src;
2907 int opsize;
2908
2909 opsize = insn_opsize(insn);
2910
2911 dest = gen_extend(DREG(insn, 9), opsize, 1);
2912 src = gen_extend(DREG(insn, 0), opsize, 1);
2913
2914 gen_addx(s, src, dest, opsize);
2915
2916 gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N);
2917 }
2918
2919 DISAS_INSN(addx_mem)
2920 {
2921 TCGv src;
2922 TCGv addr_src;
2923 TCGv dest;
2924 TCGv addr_dest;
2925 int opsize;
2926
2927 opsize = insn_opsize(insn);
2928
2929 addr_src = AREG(insn, 0);
2930 tcg_gen_subi_i32(addr_src, addr_src, opsize_bytes(opsize));
2931 src = gen_load(s, opsize, addr_src, 1);
2932
2933 addr_dest = AREG(insn, 9);
2934 tcg_gen_subi_i32(addr_dest, addr_dest, opsize_bytes(opsize));
2935 dest = gen_load(s, opsize, addr_dest, 1);
2936
2937 gen_addx(s, src, dest, opsize);
2938
2939 gen_store(s, opsize, addr_dest, QREG_CC_N);
2940 }
2941
2942 static inline void shift_im(DisasContext *s, uint16_t insn, int opsize)
2943 {
2944 int count = (insn >> 9) & 7;
2945 int logical = insn & 8;
2946 int left = insn & 0x100;
2947 int bits = opsize_bytes(opsize) * 8;
2948 TCGv reg = gen_extend(DREG(insn, 0), opsize, !logical);
2949
2950 if (count == 0) {
2951 count = 8;
2952 }
2953
2954 tcg_gen_movi_i32(QREG_CC_V, 0);
2955 if (left) {
2956 tcg_gen_shri_i32(QREG_CC_C, reg, bits - count);
2957 tcg_gen_shli_i32(QREG_CC_N, reg, count);
2958
2959 /* Note that ColdFire always clears V (done above),
2960 while M68000 sets if the most significant bit is changed at
2961 any time during the shift operation */
2962 if (!logical && m68k_feature(s->env, M68K_FEATURE_M68000)) {
2963 /* if shift count >= bits, V is (reg != 0) */
2964 if (count >= bits) {
2965 tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, reg, QREG_CC_V);
2966 } else {
2967 TCGv t0 = tcg_temp_new();
2968 tcg_gen_sari_i32(QREG_CC_V, reg, bits - 1);
2969 tcg_gen_sari_i32(t0, reg, bits - count - 1);
2970 tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, t0);
2971 tcg_temp_free(t0);
2972 }
2973 tcg_gen_neg_i32(QREG_CC_V, QREG_CC_V);
2974 }
2975 } else {
2976 tcg_gen_shri_i32(QREG_CC_C, reg, count - 1);
2977 if (logical) {
2978 tcg_gen_shri_i32(QREG_CC_N, reg, count);
2979 } else {
2980 tcg_gen_sari_i32(QREG_CC_N, reg, count);
2981 }
2982 }
2983
2984 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
2985 tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
2986 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
2987 tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C);
2988
2989 gen_partset_reg(opsize, DREG(insn, 0), QREG_CC_N);
2990 set_cc_op(s, CC_OP_FLAGS);
2991 }
2992
2993 static inline void shift_reg(DisasContext *s, uint16_t insn, int opsize)
2994 {
2995 int logical = insn & 8;
2996 int left = insn & 0x100;
2997 int bits = opsize_bytes(opsize) * 8;
2998 TCGv reg = gen_extend(DREG(insn, 0), opsize, !logical);
2999 TCGv s32;
3000 TCGv_i64 t64, s64;
3001
3002 t64 = tcg_temp_new_i64();
3003 s64 = tcg_temp_new_i64();
3004 s32 = tcg_temp_new();
3005
3006 /* Note that m68k truncates the shift count modulo 64, not 32.
3007 In addition, a 64-bit shift makes it easy to find "the last
3008 bit shifted out", for the carry flag. */
3009 tcg_gen_andi_i32(s32, DREG(insn, 9), 63);
3010 tcg_gen_extu_i32_i64(s64, s32);
3011 tcg_gen_extu_i32_i64(t64, reg);
3012
3013 /* Optimistically set V=0. Also used as a zero source below. */
3014 tcg_gen_movi_i32(QREG_CC_V, 0);
3015 if (left) {
3016 tcg_gen_shl_i64(t64, t64, s64);
3017
3018 if (opsize == OS_LONG) {
3019 tcg_gen_extr_i64_i32(QREG_CC_N, QREG_CC_C, t64);
3020 /* Note that C=0 if shift count is 0, and we get that for free. */
3021 } else {
3022 TCGv zero = tcg_const_i32(0);
3023 tcg_gen_extrl_i64_i32(QREG_CC_N, t64);
3024 tcg_gen_shri_i32(QREG_CC_C, QREG_CC_N, bits);
3025 tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
3026 s32, zero, zero, QREG_CC_C);
3027 tcg_temp_free(zero);
3028 }
3029 tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
3030
3031 /* X = C, but only if the shift count was non-zero. */
3032 tcg_gen_movcond_i32(TCG_COND_NE, QREG_CC_X, s32, QREG_CC_V,
3033 QREG_CC_C, QREG_CC_X);
3034
3035 /* M68000 sets V if the most significant bit is changed at
3036 * any time during the shift operation. Do this via creating
3037 * an extension of the sign bit, comparing, and discarding
3038 * the bits below the sign bit. I.e.
3039 * int64_t s = (intN_t)reg;
3040 * int64_t t = (int64_t)(intN_t)reg << count;
3041 * V = ((s ^ t) & (-1 << (bits - 1))) != 0
3042 */
3043 if (!logical && m68k_feature(s->env, M68K_FEATURE_M68000)) {
3044 TCGv_i64 tt = tcg_const_i64(32);
3045 /* if shift is greater than 32, use 32 */
3046 tcg_gen_movcond_i64(TCG_COND_GT, s64, s64, tt, tt, s64);
3047 tcg_temp_free_i64(tt);
3048 /* Sign extend the input to 64 bits; re-do the shift. */
3049 tcg_gen_ext_i32_i64(t64, reg);
3050 tcg_gen_shl_i64(s64, t64, s64);
3051 /* Clear all bits that are unchanged. */
3052 tcg_gen_xor_i64(t64, t64, s64);
3053 /* Ignore the bits below the sign bit. */
3054 tcg_gen_andi_i64(t64, t64, -1ULL << (bits - 1));
3055 /* If any bits remain set, we have overflow. */
3056 tcg_gen_setcondi_i64(TCG_COND_NE, t64, t64, 0);
3057 tcg_gen_extrl_i64_i32(QREG_CC_V, t64);
3058 tcg_gen_neg_i32(QREG_CC_V, QREG_CC_V);
3059 }
3060 } else {
3061 tcg_gen_shli_i64(t64, t64, 32);
3062 if (logical) {
3063 tcg_gen_shr_i64(t64, t64, s64);
3064 } else {
3065 tcg_gen_sar_i64(t64, t64, s64);
3066 }
3067 tcg_gen_extr_i64_i32(QREG_CC_C, QREG_CC_N, t64);
3068
3069 /* Note that C=0 if shift count is 0, and we get that for free. */
3070 tcg_gen_shri_i32(QREG_CC_C, QREG_CC_C, 31);
3071
3072 /* X = C, but only if the shift count was non-zero. */
3073 tcg_gen_movcond_i32(TCG_COND_NE, QREG_CC_X, s32, QREG_CC_V,
3074 QREG_CC_C, QREG_CC_X);
3075 }
3076 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
3077 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
3078
3079 tcg_temp_free(s32);
3080 tcg_temp_free_i64(s64);
3081 tcg_temp_free_i64(t64);
3082
3083 /* Write back the result. */
3084 gen_partset_reg(opsize, DREG(insn, 0), QREG_CC_N);
3085 set_cc_op(s, CC_OP_FLAGS);
3086 }
3087
3088 DISAS_INSN(shift8_im)
3089 {
3090 shift_im(s, insn, OS_BYTE);
3091 }
3092
3093 DISAS_INSN(shift16_im)
3094 {
3095 shift_im(s, insn, OS_WORD);
3096 }
3097
3098 DISAS_INSN(shift_im)
3099 {
3100 shift_im(s, insn, OS_LONG);
3101 }
3102
3103 DISAS_INSN(shift8_reg)
3104 {
3105 shift_reg(s, insn, OS_BYTE);
3106 }
3107
3108 DISAS_INSN(shift16_reg)
3109 {
3110 shift_reg(s, insn, OS_WORD);
3111 }
3112
3113 DISAS_INSN(shift_reg)
3114 {
3115 shift_reg(s, insn, OS_LONG);
3116 }
3117
3118 DISAS_INSN(shift_mem)
3119 {
3120 int logical = insn & 8;
3121 int left = insn & 0x100;
3122 TCGv src;
3123 TCGv addr;
3124
3125 SRC_EA(env, src, OS_WORD, !logical, &addr);
3126 tcg_gen_movi_i32(QREG_CC_V, 0);
3127 if (left) {
3128 tcg_gen_shri_i32(QREG_CC_C, src, 15);
3129 tcg_gen_shli_i32(QREG_CC_N, src, 1);
3130
3131 /* Note that ColdFire always clears V,
3132 while M68000 sets if the most significant bit is changed at
3133 any time during the shift operation */
3134 if (!logical && m68k_feature(s->env, M68K_FEATURE_M68000)) {
3135 src = gen_extend(src, OS_WORD, 1);
3136 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, src);
3137 }
3138 } else {
3139 tcg_gen_mov_i32(QREG_CC_C, src);
3140 if (logical) {
3141 tcg_gen_shri_i32(QREG_CC_N, src, 1);
3142 } else {
3143 tcg_gen_sari_i32(QREG_CC_N, src, 1);
3144 }
3145 }
3146
3147 gen_ext(QREG_CC_N, QREG_CC_N, OS_WORD, 1);
3148 tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
3149 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
3150 tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C);
3151
3152 DEST_EA(env, insn, OS_WORD, QREG_CC_N, &addr);
3153 set_cc_op(s, CC_OP_FLAGS);
3154 }
3155
3156 static void rotate(TCGv reg, TCGv shift, int left, int size)
3157 {
3158 switch (size) {
3159 case 8:
3160 /* Replicate the 8-bit input so that a 32-bit rotate works. */
3161 tcg_gen_ext8u_i32(reg, reg);
3162 tcg_gen_muli_i32(reg, reg, 0x01010101);
3163 goto do_long;
3164 case 16:
3165 /* Replicate the 16-bit input so that a 32-bit rotate works. */
3166 tcg_gen_deposit_i32(reg, reg, reg, 16, 16);
3167 goto do_long;
3168 do_long:
3169 default:
3170 if (left) {
3171 tcg_gen_rotl_i32(reg, reg, shift);
3172 } else {
3173 tcg_gen_rotr_i32(reg, reg, shift);
3174 }
3175 }
3176
3177 /* compute flags */
3178
3179 switch (size) {
3180 case 8:
3181 tcg_gen_ext8s_i32(reg, reg);
3182 break;
3183 case 16:
3184 tcg_gen_ext16s_i32(reg, reg);
3185 break;
3186 default:
3187 break;
3188 }
3189
3190 /* QREG_CC_X is not affected */
3191
3192 tcg_gen_mov_i32(QREG_CC_N, reg);
3193 tcg_gen_mov_i32(QREG_CC_Z, reg);
3194
3195 if (left) {
3196 tcg_gen_andi_i32(QREG_CC_C, reg, 1);
3197 } else {
3198 tcg_gen_shri_i32(QREG_CC_C, reg, 31);
3199 }
3200
3201 tcg_gen_movi_i32(QREG_CC_V, 0); /* always cleared */
3202 }
3203
3204 static void rotate_x_flags(TCGv reg, TCGv X, int size)
3205 {
3206 switch (size) {
3207 case 8:
3208 tcg_gen_ext8s_i32(reg, reg);
3209 break;
3210 case 16:
3211 tcg_gen_ext16s_i32(reg, reg);
3212 break;
3213 default:
3214 break;
3215 }
3216 tcg_gen_mov_i32(QREG_CC_N, reg);
3217 tcg_gen_mov_i32(QREG_CC_Z, reg);
3218 tcg_gen_mov_i32(QREG_CC_X, X);
3219 tcg_gen_mov_i32(QREG_CC_C, X);
3220 tcg_gen_movi_i32(QREG_CC_V, 0);
3221 }
3222
3223 /* Result of rotate_x() is valid if 0 <= shift <= size */
3224 static TCGv rotate_x(TCGv reg, TCGv shift, int left, int size)
3225 {
3226 TCGv X, shl, shr, shx, sz, zero;
3227
3228 sz = tcg_const_i32(size);
3229
3230 shr = tcg_temp_new();
3231 shl = tcg_temp_new();
3232 shx = tcg_temp_new();
3233 if (left) {
3234 tcg_gen_mov_i32(shl, shift); /* shl = shift */
3235 tcg_gen_movi_i32(shr, size + 1);
3236 tcg_gen_sub_i32(shr, shr, shift); /* shr = size + 1 - shift */
3237 tcg_gen_subi_i32(shx, shift, 1); /* shx = shift - 1 */
3238 /* shx = shx < 0 ? size : shx; */
3239 zero = tcg_const_i32(0);
3240 tcg_gen_movcond_i32(TCG_COND_LT, shx, shx, zero, sz, shx);
3241 tcg_temp_free(zero);
3242 } else {
3243 tcg_gen_mov_i32(shr, shift); /* shr = shift */
3244 tcg_gen_movi_i32(shl, size + 1);
3245 tcg_gen_sub_i32(shl, shl, shift); /* shl = size + 1 - shift */
3246 tcg_gen_sub_i32(shx, sz, shift); /* shx = size - shift */
3247 }
3248
3249 /* reg = (reg << shl) | (reg >> shr) | (x << shx); */
3250
3251 tcg_gen_shl_i32(shl, reg, shl);
3252 tcg_gen_shr_i32(shr, reg, shr);
3253 tcg_gen_or_i32(reg, shl, shr);
3254 tcg_temp_free(shl);
3255 tcg_temp_free(shr);
3256 tcg_gen_shl_i32(shx, QREG_CC_X, shx);
3257 tcg_gen_or_i32(reg, reg, shx);
3258 tcg_temp_free(shx);
3259
3260 /* X = (reg >> size) & 1 */
3261
3262 X = tcg_temp_new();
3263 tcg_gen_shr_i32(X, reg, sz);
3264 tcg_gen_andi_i32(X, X, 1);
3265 tcg_temp_free(sz);
3266
3267 return X;
3268 }
3269
3270 /* Result of rotate32_x() is valid if 0 <= shift < 33 */
3271 static TCGv rotate32_x(TCGv reg, TCGv shift, int left)
3272 {
3273 TCGv_i64 t0, shift64;
3274 TCGv X, lo, hi, zero;
3275
3276 shift64 = tcg_temp_new_i64();
3277 tcg_gen_extu_i32_i64(shift64, shift);
3278
3279 t0 = tcg_temp_new_i64();
3280
3281 X = tcg_temp_new();
3282 lo = tcg_temp_new();
3283 hi = tcg_temp_new();
3284
3285 if (left) {
3286 /* create [reg:X:..] */
3287
3288 tcg_gen_shli_i32(lo, QREG_CC_X, 31);
3289 tcg_gen_concat_i32_i64(t0, lo, reg);
3290
3291 /* rotate */
3292
3293 tcg_gen_rotl_i64(t0, t0, shift64);
3294 tcg_temp_free_i64(shift64);
3295
3296 /* result is [reg:..:reg:X] */
3297
3298 tcg_gen_extr_i64_i32(lo, hi, t0);
3299 tcg_gen_andi_i32(X, lo, 1);
3300
3301 tcg_gen_shri_i32(lo, lo, 1);
3302 } else {
3303 /* create [..:X:reg] */
3304
3305 tcg_gen_concat_i32_i64(t0, reg, QREG_CC_X);
3306
3307 tcg_gen_rotr_i64(t0, t0, shift64);
3308 tcg_temp_free_i64(shift64);
3309
3310 /* result is value: [X:reg:..:reg] */
3311
3312 tcg_gen_extr_i64_i32(lo, hi, t0);
3313
3314 /* extract X */
3315
3316 tcg_gen_shri_i32(X, hi, 31);
3317
3318 /* extract result */
3319
3320 tcg_gen_shli_i32(hi, hi, 1);
3321 }
3322 tcg_temp_free_i64(t0);
3323 tcg_gen_or_i32(lo, lo, hi);
3324 tcg_temp_free(hi);
3325
3326 /* if shift == 0, register and X are not affected */
3327
3328 zero = tcg_const_i32(0);
3329 tcg_gen_movcond_i32(TCG_COND_EQ, X, shift, zero, QREG_CC_X, X);
3330 tcg_gen_movcond_i32(TCG_COND_EQ, reg, shift, zero, reg, lo);
3331 tcg_temp_free(zero);
3332 tcg_temp_free(lo);
3333
3334 return X;
3335 }
3336
3337 DISAS_INSN(rotate_im)
3338 {
3339 TCGv shift;
3340 int tmp;
3341 int left = (insn & 0x100);
3342
3343 tmp = (insn >> 9) & 7;
3344 if (tmp == 0) {
3345 tmp = 8;
3346 }
3347
3348 shift = tcg_const_i32(tmp);
3349 if (insn & 8) {
3350 rotate(DREG(insn, 0), shift, left, 32);
3351 } else {
3352 TCGv X = rotate32_x(DREG(insn, 0), shift, left);
3353 rotate_x_flags(DREG(insn, 0), X, 32);
3354 tcg_temp_free(X);
3355 }
3356 tcg_temp_free(shift);
3357
3358 set_cc_op(s, CC_OP_FLAGS);
3359 }
3360
3361 DISAS_INSN(rotate8_im)
3362 {
3363 int left = (insn & 0x100);
3364 TCGv reg;
3365 TCGv shift;
3366 int tmp;
3367
3368 reg = gen_extend(DREG(insn, 0), OS_BYTE, 0);
3369
3370 tmp = (insn >> 9) & 7;
3371 if (tmp == 0) {
3372 tmp = 8;
3373 }
3374
3375 shift = tcg_const_i32(tmp);
3376 if (insn & 8) {
3377 rotate(reg, shift, left, 8);
3378 } else {
3379 TCGv X = rotate_x(reg, shift, left, 8);
3380 rotate_x_flags(reg, X, 8);
3381 tcg_temp_free(X);
3382 }
3383 tcg_temp_free(shift);
3384 gen_partset_reg(OS_BYTE, DREG(insn, 0), reg);
3385 set_cc_op(s, CC_OP_FLAGS);
3386 }
3387
3388 DISAS_INSN(rotate16_im)
3389 {
3390 int left = (insn & 0x100);
3391 TCGv reg;
3392 TCGv shift;
3393 int tmp;
3394
3395 reg = gen_extend(DREG(insn, 0), OS_WORD, 0);
3396 tmp = (insn >> 9) & 7;
3397 if (tmp == 0) {
3398 tmp = 8;
3399 }
3400
3401 shift = tcg_const_i32(tmp);
3402 if (insn & 8) {
3403 rotate(reg, shift, left, 16);
3404 } else {
3405 TCGv X = rotate_x(reg, shift, left, 16);
3406 rotate_x_flags(reg, X, 16);
3407 tcg_temp_free(X);
3408 }
3409 tcg_temp_free(shift);
3410 gen_partset_reg(OS_WORD, DREG(insn, 0), reg);
3411 set_cc_op(s, CC_OP_FLAGS);
3412 }
3413
3414 DISAS_INSN(rotate_reg)
3415 {
3416 TCGv reg;
3417 TCGv src;
3418 TCGv t0, t1;
3419 int left = (insn & 0x100);
3420
3421 reg = DREG(insn, 0);
3422 src = DREG(insn, 9);
3423 /* shift in [0..63] */
3424 t0 = tcg_temp_new();
3425 tcg_gen_andi_i32(t0, src, 63);
3426 t1 = tcg_temp_new_i32();
3427 if (insn & 8) {
3428 tcg_gen_andi_i32(t1, src, 31);
3429 rotate(reg, t1, left, 32);
3430 /* if shift == 0, clear C */
3431 tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
3432 t0, QREG_CC_V /* 0 */,
3433 QREG_CC_V /* 0 */, QREG_CC_C);
3434 } else {
3435 TCGv X;
3436 /* modulo 33 */
3437 tcg_gen_movi_i32(t1, 33);
3438 tcg_gen_remu_i32(t1, t0, t1);
3439 X = rotate32_x(DREG(insn, 0), t1, left);
3440 rotate_x_flags(DREG(insn, 0), X, 32);
3441 tcg_temp_free(X);
3442 }
3443 tcg_temp_free(t1);
3444 tcg_temp_free(t0);
3445 set_cc_op(s, CC_OP_FLAGS);
3446 }
3447
3448 DISAS_INSN(rotate8_reg)
3449 {
3450 TCGv reg;
3451 TCGv src;
3452 TCGv t0, t1;
3453 int left = (insn & 0x100);
3454
3455 reg = gen_extend(DREG(insn, 0), OS_BYTE, 0);
3456 src = DREG(insn, 9);
3457 /* shift in [0..63] */
3458 t0 = tcg_temp_new_i32();
3459 tcg_gen_andi_i32(t0, src, 63);
3460 t1 = tcg_temp_new_i32();
3461 if (insn & 8) {
3462 tcg_gen_andi_i32(t1, src, 7);
3463 rotate(reg, t1, left, 8);
3464 /* if shift == 0, clear C */
3465 tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
3466 t0, QREG_CC_V /* 0 */,
3467 QREG_CC_V /* 0 */, QREG_CC_C);
3468 } else {
3469 TCGv X;
3470 /* modulo 9 */
3471 tcg_gen_movi_i32(t1, 9);
3472 tcg_gen_remu_i32(t1, t0, t1);
3473 X = rotate_x(reg, t1, left, 8);
3474 rotate_x_flags(reg, X, 8);
3475 tcg_temp_free(X);
3476 }
3477 tcg_temp_free(t1);
3478 tcg_temp_free(t0);
3479 gen_partset_reg(OS_BYTE, DREG(insn, 0), reg);
3480 set_cc_op(s, CC_OP_FLAGS);
3481 }
3482
3483 DISAS_INSN(rotate16_reg)
3484 {
3485 TCGv reg;
3486 TCGv src;
3487 TCGv t0, t1;
3488 int left = (insn & 0x100);
3489
3490 reg = gen_extend(DREG(insn, 0), OS_WORD, 0);
3491 src = DREG(insn, 9);
3492 /* shift in [0..63] */
3493 t0 = tcg_temp_new_i32();
3494 tcg_gen_andi_i32(t0, src, 63);
3495 t1 = tcg_temp_new_i32();
3496 if (insn & 8) {
3497 tcg_gen_andi_i32(t1, src, 15);
3498 rotate(reg, t1, left, 16);
3499 /* if shift == 0, clear C */
3500 tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
3501 t0, QREG_CC_V /* 0 */,
3502 QREG_CC_V /* 0 */, QREG_CC_C);
3503 } else {
3504 TCGv X;
3505 /* modulo 17 */
3506 tcg_gen_movi_i32(t1, 17);
3507 tcg_gen_remu_i32(t1, t0, t1);
3508 X = rotate_x(reg, t1, left, 16);
3509 rotate_x_flags(reg, X, 16);
3510 tcg_temp_free(X);
3511 }
3512 tcg_temp_free(t1);
3513 tcg_temp_free(t0);
3514 gen_partset_reg(OS_WORD, DREG(insn, 0), reg);
3515 set_cc_op(s, CC_OP_FLAGS);
3516 }
3517
3518 DISAS_INSN(rotate_mem)
3519 {
3520 TCGv src;
3521 TCGv addr;
3522 TCGv shift;
3523 int left = (insn & 0x100);
3524
3525 SRC_EA(env, src, OS_WORD, 0, &addr);
3526
3527 shift = tcg_const_i32(1);
3528 if (insn & 0x0200) {
3529 rotate(src, shift, left, 16);
3530 } else {
3531 TCGv X = rotate_x(src, shift, left, 16);
3532 rotate_x_flags(src, X, 16);
3533 tcg_temp_free(X);
3534 }
3535 tcg_temp_free(shift);
3536 DEST_EA(env, insn, OS_WORD, src, &addr);
3537 set_cc_op(s, CC_OP_FLAGS);
3538 }
3539
3540 DISAS_INSN(bfext_reg)
3541 {
3542 int ext = read_im16(env, s);
3543 int is_sign = insn & 0x200;
3544 TCGv src = DREG(insn, 0);
3545 TCGv dst = DREG(ext, 12);
3546 int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
3547 int ofs = extract32(ext, 6, 5); /* big bit-endian */
3548 int pos = 32 - ofs - len; /* little bit-endian */
3549 TCGv tmp = tcg_temp_new();
3550 TCGv shift;
3551
3552 /* In general, we're going to rotate the field so that it's at the
3553 top of the word and then right-shift by the compliment of the
3554 width to extend the field. */
3555 if (ext & 0x20) {
3556 /* Variable width. */
3557 if (ext & 0x800) {
3558 /* Variable offset. */
3559 tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
3560 tcg_gen_rotl_i32(tmp, src, tmp);
3561 } else {
3562 tcg_gen_rotli_i32(tmp, src, ofs);
3563 }
3564
3565 shift = tcg_temp_new();
3566 tcg_gen_neg_i32(shift, DREG(ext, 0));
3567 tcg_gen_andi_i32(shift, shift, 31);
3568 tcg_gen_sar_i32(QREG_CC_N, tmp, shift);
3569 if (is_sign) {
3570 tcg_gen_mov_i32(dst, QREG_CC_N);
3571 } else {
3572 tcg_gen_shr_i32(dst, tmp, shift);
3573 }
3574 tcg_temp_free(shift);
3575 } else {
3576 /* Immediate width. */
3577 if (ext & 0x800) {
3578 /* Variable offset */
3579 tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
3580 tcg_gen_rotl_i32(tmp, src, tmp);
3581 src = tmp;
3582 pos = 32 - len;
3583 } else {
3584 /* Immediate offset. If the field doesn't wrap around the
3585 end of the word, rely on (s)extract completely. */
3586 if (pos < 0) {
3587 tcg_gen_rotli_i32(tmp, src, ofs);
3588 src = tmp;
3589 pos = 32 - len;
3590 }
3591 }
3592
3593 tcg_gen_sextract_i32(QREG_CC_N, src, pos, len);
3594 if (is_sign) {
3595 tcg_gen_mov_i32(dst, QREG_CC_N);
3596 } else {
3597 tcg_gen_extract_i32(dst, src, pos, len);
3598 }
3599 }
3600
3601 tcg_temp_free(tmp);
3602 set_cc_op(s, CC_OP_LOGIC);
3603 }
3604
3605 DISAS_INSN(bfext_mem)
3606 {
3607 int ext = read_im16(env, s);
3608 int is_sign = insn & 0x200;
3609 TCGv dest = DREG(ext, 12);
3610 TCGv addr, len, ofs;
3611
3612 addr = gen_lea(env, s, insn, OS_UNSIZED);
3613 if (IS_NULL_QREG(addr)) {
3614 gen_addr_fault(s);
3615 return;
3616 }
3617
3618 if (ext & 0x20) {
3619 len = DREG(ext, 0);
3620 } else {
3621 len = tcg_const_i32(extract32(ext, 0, 5));
3622 }
3623 if (ext & 0x800) {
3624 ofs = DREG(ext, 6);
3625 } else {
3626 ofs = tcg_const_i32(extract32(ext, 6, 5));
3627 }
3628
3629 if (is_sign) {
3630 gen_helper_bfexts_mem(dest, cpu_env, addr, ofs, len);
3631 tcg_gen_mov_i32(QREG_CC_N, dest);
3632 } else {
3633 TCGv_i64 tmp = tcg_temp_new_i64();
3634 gen_helper_bfextu_mem(tmp, cpu_env, addr, ofs, len);
3635 tcg_gen_extr_i64_i32(dest, QREG_CC_N, tmp);
3636 tcg_temp_free_i64(tmp);
3637 }
3638 set_cc_op(s, CC_OP_LOGIC);
3639
3640 if (!(ext & 0x20)) {
3641 tcg_temp_free(len);
3642 }
3643 if (!(ext & 0x800)) {
3644 tcg_temp_free(ofs);
3645 }
3646 }
3647
3648 DISAS_INSN(bfop_reg)
3649 {
3650 int ext = read_im16(env, s);
3651 TCGv src = DREG(insn, 0);
3652 int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
3653 int ofs = extract32(ext, 6, 5); /* big bit-endian */
3654 TCGv mask, tofs, tlen;
3655
3656 TCGV_UNUSED(tofs);
3657 TCGV_UNUSED(tlen);
3658 if ((insn & 0x0f00) == 0x0d00) { /* bfffo */
3659 tofs = tcg_temp_new();
3660 tlen = tcg_temp_new();
3661 }
3662
3663 if ((ext & 0x820) == 0) {
3664 /* Immediate width and offset. */
3665 uint32_t maski = 0x7fffffffu >> (len - 1);
3666 if (ofs + len <= 32) {
3667 tcg_gen_shli_i32(QREG_CC_N, src, ofs);
3668 } else {
3669 tcg_gen_rotli_i32(QREG_CC_N, src, ofs);
3670 }
3671 tcg_gen_andi_i32(QREG_CC_N, QREG_CC_N, ~maski);
3672 mask = tcg_const_i32(ror32(maski, ofs));
3673 if (!TCGV_IS_UNUSED(tofs)) {
3674 tcg_gen_movi_i32(tofs, ofs);
3675 tcg_gen_movi_i32(tlen, len);
3676 }
3677 } else {
3678 TCGv tmp = tcg_temp_new();
3679 if (ext & 0x20) {
3680 /* Variable width */
3681 tcg_gen_subi_i32(tmp, DREG(ext, 0), 1);
3682 tcg_gen_andi_i32(tmp, tmp, 31);
3683 mask = tcg_const_i32(0x7fffffffu);
3684 tcg_gen_shr_i32(mask, mask, tmp);
3685 if (!TCGV_IS_UNUSED(tlen)) {
3686 tcg_gen_addi_i32(tlen, tmp, 1);
3687 }
3688 } else {
3689 /* Immediate width */
3690 mask = tcg_const_i32(0x7fffffffu >> (len - 1));
3691 if (!TCGV_IS_UNUSED(tlen)) {
3692 tcg_gen_movi_i32(tlen, len);
3693 }
3694 }
3695 if (ext & 0x800) {
3696 /* Variable offset */
3697 tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
3698 tcg_gen_rotl_i32(QREG_CC_N, src, tmp);
3699 tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask);
3700 tcg_gen_rotr_i32(mask, mask, tmp);
3701 if (!TCGV_IS_UNUSED(tofs)) {
3702 tcg_gen_mov_i32(tofs, tmp);
3703 }
3704 } else {
3705 /* Immediate offset (and variable width) */
3706 tcg_gen_rotli_i32(QREG_CC_N, src, ofs);
3707 tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask);
3708 tcg_gen_rotri_i32(mask, mask, ofs);
3709 if (!TCGV_IS_UNUSED(tofs)) {
3710 tcg_gen_movi_i32(tofs, ofs);
3711 }
3712 }
3713 tcg_temp_free(tmp);
3714 }
3715 set_cc_op(s, CC_OP_LOGIC);
3716
3717 switch (insn & 0x0f00) {
3718 case 0x0a00: /* bfchg */
3719 tcg_gen_eqv_i32(src, src, mask);
3720 break;
3721 case 0x0c00: /* bfclr */
3722 tcg_gen_and_i32(src, src, mask);
3723 break;
3724 case 0x0d00: /* bfffo */
3725 gen_helper_bfffo_reg(DREG(ext, 12), QREG_CC_N, tofs, tlen);
3726 tcg_temp_free(tlen);
3727 tcg_temp_free(tofs);
3728 break;
3729 case 0x0e00: /* bfset */
3730 tcg_gen_orc_i32(src, src, mask);
3731 break;
3732 case 0x0800: /* bftst */
3733 /* flags already set; no other work to do. */
3734 break;
3735 default:
3736 g_assert_not_reached();
3737 }
3738 tcg_temp_free(mask);
3739 }
3740
3741 DISAS_INSN(bfop_mem)
3742 {
3743 int ext = read_im16(env, s);
3744 TCGv addr, len, ofs;
3745 TCGv_i64 t64;
3746
3747 addr = gen_lea(env, s, insn, OS_UNSIZED);
3748 if (IS_NULL_QREG(addr)) {
3749 gen_addr_fault(s);
3750 return;
3751 }
3752
3753 if (ext & 0x20) {
3754 len = DREG(ext, 0);
3755 } else {
3756 len = tcg_const_i32(extract32(ext, 0, 5));
3757 }
3758 if (ext & 0x800) {
3759 ofs = DREG(ext, 6);
3760 } else {
3761 ofs = tcg_const_i32(extract32(ext, 6, 5));
3762 }
3763
3764 switch (insn & 0x0f00) {
3765 case 0x0a00: /* bfchg */
3766 gen_helper_bfchg_mem(QREG_CC_N, cpu_env, addr, ofs, len);
3767 break;
3768 case 0x0c00: /* bfclr */
3769 gen_helper_bfclr_mem(QREG_CC_N, cpu_env, addr, ofs, len);
3770 break;
3771 case 0x0d00: /* bfffo */
3772 t64 = tcg_temp_new_i64();
3773 gen_helper_bfffo_mem(t64, cpu_env, addr, ofs, len);
3774 tcg_gen_extr_i64_i32(DREG(ext, 12), QREG_CC_N, t64);
3775 tcg_temp_free_i64(t64);
3776 break;
3777 case 0x0e00: /* bfset */
3778 gen_helper_bfset_mem(QREG_CC_N, cpu_env, addr, ofs, len);
3779 break;
3780 case 0x0800: /* bftst */
3781 gen_helper_bfexts_mem(QREG_CC_N, cpu_env, addr, ofs, len);
3782 break;
3783 default:
3784 g_assert_not_reached();
3785 }
3786 set_cc_op(s, CC_OP_LOGIC);
3787
3788 if (!(ext & 0x20)) {
3789 tcg_temp_free(len);
3790 }
3791 if (!(ext & 0x800)) {
3792 tcg_temp_free(ofs);
3793 }
3794 }
3795
3796 DISAS_INSN(bfins_reg)
3797 {
3798 int ext = read_im16(env, s);
3799 TCGv dst = DREG(insn, 0);
3800 TCGv src = DREG(ext, 12);
3801 int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
3802 int ofs = extract32(ext, 6, 5); /* big bit-endian */
3803 int pos = 32 - ofs - len; /* little bit-endian */
3804 TCGv tmp;
3805
3806 tmp = tcg_temp_new();
3807
3808 if (ext & 0x20) {
3809 /* Variable width */
3810 tcg_gen_neg_i32(tmp, DREG(ext, 0));
3811 tcg_gen_andi_i32(tmp, tmp, 31);
3812 tcg_gen_shl_i32(QREG_CC_N, src, tmp);
3813 } else {
3814 /* Immediate width */
3815 tcg_gen_shli_i32(QREG_CC_N, src, 32 - len);
3816 }
3817 set_cc_op(s, CC_OP_LOGIC);
3818
3819 /* Immediate width and offset */
3820 if ((ext & 0x820) == 0) {
3821 /* Check for suitability for deposit. */
3822 if (pos >= 0) {
3823 tcg_gen_deposit_i32(dst, dst, src, pos, len);
3824 } else {
3825 uint32_t maski = -2U << (len - 1);
3826 uint32_t roti = (ofs + len) & 31;
3827 tcg_gen_andi_i32(tmp, src, ~maski);
3828 tcg_gen_rotri_i32(tmp, tmp, roti);
3829 tcg_gen_andi_i32(dst, dst, ror32(maski, roti));
3830 tcg_gen_or_i32(dst, dst, tmp);
3831 }
3832 } else {
3833 TCGv mask = tcg_temp_new();
3834 TCGv rot = tcg_temp_new();
3835
3836 if (ext & 0x20) {
3837 /* Variable width */
3838 tcg_gen_subi_i32(rot, DREG(ext, 0), 1);
3839 tcg_gen_andi_i32(rot, rot, 31);
3840 tcg_gen_movi_i32(mask, -2);
3841 tcg_gen_shl_i32(mask, mask, rot);
3842 tcg_gen_mov_i32(rot, DREG(ext, 0));
3843 tcg_gen_andc_i32(tmp, src, mask);
3844 } else {
3845 /* Immediate width (variable offset) */
3846 uint32_t maski = -2U << (len - 1);
3847 tcg_gen_andi_i32(tmp, src, ~maski);
3848 tcg_gen_movi_i32(mask, maski);
3849 tcg_gen_movi_i32(rot, len & 31);
3850 }
3851 if (ext & 0x800) {
3852 /* Variable offset */
3853 tcg_gen_add_i32(rot, rot, DREG(ext, 6));
3854 } else {
3855 /* Immediate offset (variable width) */
3856 tcg_gen_addi_i32(rot, rot, ofs);
3857 }
3858 tcg_gen_andi_i32(rot, rot, 31);
3859 tcg_gen_rotr_i32(mask, mask, rot);
3860 tcg_gen_rotr_i32(tmp, tmp, rot);
3861 tcg_gen_and_i32(dst, dst, mask);
3862 tcg_gen_or_i32(dst, dst, tmp);
3863
3864 tcg_temp_free(rot);
3865 tcg_temp_free(mask);
3866 }
3867 tcg_temp_free(tmp);
3868 }
3869
3870 DISAS_INSN(bfins_mem)
3871 {
3872 int ext = read_im16(env, s);
3873 TCGv src = DREG(ext, 12);
3874 TCGv addr, len, ofs;
3875
3876 addr = gen_lea(env, s, insn, OS_UNSIZED);
3877 if (IS_NULL_QREG(addr)) {
3878 gen_addr_fault(s);
3879 return;
3880 }
3881
3882 if (ext & 0x20) {
3883 len = DREG(ext, 0);
3884 } else {
3885 len = tcg_const_i32(extract32(ext, 0, 5));
3886 }
3887 if (ext & 0x800) {
3888 ofs = DREG(ext, 6);
3889 } else {
3890 ofs = tcg_const_i32(extract32(ext, 6, 5));
3891 }
3892
3893 gen_helper_bfins_mem(QREG_CC_N, cpu_env, addr, src, ofs, len);
3894 set_cc_op(s, CC_OP_LOGIC);
3895
3896 if (!(ext & 0x20)) {
3897 tcg_temp_free(len);
3898 }
3899 if (!(ext & 0x800)) {
3900 tcg_temp_free(ofs);
3901 }
3902 }
3903
3904 DISAS_INSN(ff1)
3905 {
3906 TCGv reg;
3907 reg = DREG(insn, 0);
3908 gen_logic_cc(s, reg, OS_LONG);
3909 gen_helper_ff1(reg, reg);
3910 }
3911
3912 static TCGv gen_get_sr(DisasContext *s)
3913 {
3914 TCGv ccr;
3915 TCGv sr;
3916
3917 ccr = gen_get_ccr(s);
3918 sr = tcg_temp_new();
3919 tcg_gen_andi_i32(sr, QREG_SR, 0xffe0);
3920 tcg_gen_or_i32(sr, sr, ccr);
3921 return sr;
3922 }
3923
3924 DISAS_INSN(strldsr)
3925 {
3926 uint16_t ext;
3927 uint32_t addr;
3928
3929 addr = s->pc - 2;
3930 ext = read_im16(env, s);
3931 if (ext != 0x46FC) {
3932 gen_exception(s, addr, EXCP_UNSUPPORTED);
3933 return;
3934 }
3935 ext = read_im16(env, s);
3936 if (IS_USER(s) || (ext & SR_S) == 0) {
3937 gen_exception(s, addr, EXCP_PRIVILEGE);
3938 return;
3939 }
3940 gen_push(s, gen_get_sr(s));
3941 gen_set_sr_im(s, ext, 0);
3942 }
3943
3944 DISAS_INSN(move_from_sr)
3945 {
3946 TCGv sr;
3947
3948 if (IS_USER(s) && !m68k_feature(env, M68K_FEATURE_M68000)) {
3949 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
3950 return;
3951 }
3952 sr = gen_get_sr(s);
3953 DEST_EA(env, insn, OS_WORD, sr, NULL);
3954 }
3955
3956 DISAS_INSN(move_to_sr)
3957 {
3958 if (IS_USER(s)) {
3959 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
3960 return;
3961 }
3962 gen_set_sr(env, s, insn, 0);
3963 gen_lookup_tb(s);
3964 }
3965
3966 DISAS_INSN(move_from_usp)
3967 {
3968 if (IS_USER(s)) {
3969 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
3970 return;
3971 }
3972 tcg_gen_ld_i32(AREG(insn, 0), cpu_env,
3973 offsetof(CPUM68KState, sp[M68K_USP]));
3974 }
3975
3976 DISAS_INSN(move_to_usp)
3977 {
3978 if (IS_USER(s)) {
3979 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
3980 return;
3981 }
3982 tcg_gen_st_i32(AREG(insn, 0), cpu_env,
3983 offsetof(CPUM68KState, sp[M68K_USP]));
3984 }
3985
3986 DISAS_INSN(halt)
3987 {
3988 gen_exception(s, s->pc, EXCP_HALT_INSN);
3989 }
3990
3991 DISAS_INSN(stop)
3992 {
3993 uint16_t ext;
3994
3995 if (IS_USER(s)) {
3996 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
3997 return;
3998 }
3999
4000 ext = read_im16(env, s);
4001
4002 gen_set_sr_im(s, ext, 0);
4003 tcg_gen_movi_i32(cpu_halted, 1);
4004 gen_exception(s, s->pc, EXCP_HLT);
4005 }
4006
4007 DISAS_INSN(rte)
4008 {
4009 if (IS_USER(s)) {
4010 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
4011 return;
4012 }
4013 gen_exception(s, s->pc - 2, EXCP_RTE);
4014 }
4015
4016 DISAS_INSN(movec)
4017 {
4018 uint16_t ext;
4019 TCGv reg;
4020
4021 if (IS_USER(s)) {
4022 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
4023 return;
4024 }
4025
4026 ext = read_im16(env, s);
4027
4028 if (ext & 0x8000) {
4029 reg = AREG(ext, 12);
4030 } else {
4031 reg = DREG(ext, 12);
4032 }
4033 gen_helper_movec(cpu_env, tcg_const_i32(ext & 0xfff), reg);
4034 gen_lookup_tb(s);
4035 }
4036
4037 DISAS_INSN(intouch)
4038 {
4039 if (IS_USER(s)) {
4040 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
4041 return;
4042 }
4043 /* ICache fetch. Implement as no-op. */
4044 }
4045
4046 DISAS_INSN(cpushl)
4047 {
4048 if (IS_USER(s)) {
4049 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
4050 return;
4051 }
4052 /* Cache push/invalidate. Implement as no-op. */
4053 }
4054
4055 DISAS_INSN(wddata)
4056 {
4057 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
4058 }
4059
4060 DISAS_INSN(wdebug)
4061 {
4062 M68kCPU *cpu = m68k_env_get_cpu(env);
4063
4064 if (IS_USER(s)) {
4065 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
4066 return;
4067 }
4068 /* TODO: Implement wdebug. */
4069 cpu_abort(CPU(cpu), "WDEBUG not implemented");
4070 }
4071
4072 DISAS_INSN(trap)
4073 {
4074 gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));
4075 }
4076
4077 /* ??? FP exceptions are not implemented. Most exceptions are deferred until
4078 immediately before the next FP instruction is executed. */
4079 DISAS_INSN(fpu)
4080 {
4081 uint16_t ext;
4082 int32_t offset;
4083 int opmode;
4084 TCGv_i64 src;
4085 TCGv_i64 dest;
4086 TCGv_i64 res;
4087 TCGv tmp32;
4088 int round;
4089 int set_dest;
4090 int opsize;
4091
4092 ext = read_im16(env, s);
4093 opmode = ext & 0x7f;
4094 switch ((ext >> 13) & 7) {
4095 case 0: case 2:
4096 break;
4097 case 1:
4098 goto undef;
4099 case 3: /* fmove out */
4100 src = FREG(ext, 7);
4101 tmp32 = tcg_temp_new_i32();
4102 /* fmove */
4103 /* ??? TODO: Proper behavior on overflow. */
4104 switch ((ext >> 10) & 7) {
4105 case 0:
4106 opsize = OS_LONG;
4107 gen_helper_f64_to_i32(tmp32, cpu_env, src);
4108 break;
4109 case 1:
4110 opsize = OS_SINGLE;
4111 gen_helper_f64_to_f32(tmp32, cpu_env, src);
4112 break;
4113 case 4:
4114 opsize = OS_WORD;
4115 gen_helper_f64_to_i32(tmp32, cpu_env, src);
4116 break;
4117 case 5: /* OS_DOUBLE */
4118 tcg_gen_mov_i32(tmp32, AREG(insn, 0));
4119 switch ((insn >> 3) & 7) {
4120 case 2:
4121 case 3:
4122 break;
4123 case 4:
4124 tcg_gen_addi_i32(tmp32, tmp32, -8);
4125 break;
4126 case 5:
4127 offset = cpu_ldsw_code(env, s->pc);
4128 s->pc += 2;
4129 tcg_gen_addi_i32(tmp32, tmp32, offset);
4130 break;
4131 default:
4132 goto undef;
4133 }
4134 gen_store64(s, tmp32, src);
4135 switch ((insn >> 3) & 7) {
4136 case 3:
4137 tcg_gen_addi_i32(tmp32, tmp32, 8);
4138 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
4139 break;
4140 case 4:
4141 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
4142 break;
4143 }
4144 tcg_temp_free_i32(tmp32);
4145 return;
4146 case 6:
4147 opsize = OS_BYTE;
4148 gen_helper_f64_to_i32(tmp32, cpu_env, src);
4149 break;
4150 default:
4151 goto undef;
4152 }
4153 DEST_EA(env, insn, opsize, tmp32, NULL);
4154 tcg_temp_free_i32(tmp32);
4155 return;
4156 case 4: /* fmove to control register. */
4157 switch ((ext >> 10) & 7) {
4158 case 4: /* FPCR */
4159 /* Not implemented. Ignore writes. */
4160 break;
4161 case 1: /* FPIAR */
4162 case 2: /* FPSR */
4163 default:
4164 cpu_abort(NULL, "Unimplemented: fmove to control %d",
4165 (ext >> 10) & 7);
4166 }
4167 break;
4168 case 5: /* fmove from control register. */
4169 switch ((ext >> 10) & 7) {
4170 case 4: /* FPCR */
4171 /* Not implemented. Always return zero. */
4172 tmp32 = tcg_const_i32(0);
4173 break;
4174 case 1: /* FPIAR */
4175 case 2: /* FPSR */
4176 default:
4177 cpu_abort(NULL, "Unimplemented: fmove from control %d",
4178 (ext >> 10) & 7);
4179 goto undef;
4180 }
4181 DEST_EA(env, insn, OS_LONG, tmp32, NULL);
4182 break;
4183 case 6: /* fmovem */
4184 case 7:
4185 {
4186 TCGv addr;
4187 uint16_t mask;
4188 int i;
4189 if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0)
4190 goto undef;
4191 tmp32 = gen_lea(env, s, insn, OS_LONG);
4192 if (IS_NULL_QREG(tmp32)) {
4193 gen_addr_fault(s);
4194 return;
4195 }
4196 addr = tcg_temp_new_i32();
4197 tcg_gen_mov_i32(addr, tmp32);
4198 mask = 0x80;
4199 for (i = 0; i < 8; i++) {
4200 if (ext & mask) {
4201 dest = FREG(i, 0);
4202 if (ext & (1 << 13)) {
4203 /* store */
4204 tcg_gen_qemu_stf64(dest, addr, IS_USER(s));
4205 } else {
4206 /* load */
4207 tcg_gen_qemu_ldf64(dest, addr, IS_USER(s));
4208 }
4209 if (ext & (mask - 1))
4210 tcg_gen_addi_i32(addr, addr, 8);
4211 }
4212 mask >>= 1;
4213 }
4214 tcg_temp_free_i32(addr);
4215 }
4216 return;
4217 }
4218 if (ext & (1 << 14)) {
4219 /* Source effective address. */
4220 switch ((ext >> 10) & 7) {
4221 case 0: opsize = OS_LONG; break;
4222 case 1: opsize = OS_SINGLE; break;
4223 case 4: opsize = OS_WORD; break;
4224 case 5: opsize = OS_DOUBLE; break;
4225 case 6: opsize = OS_BYTE; break;
4226 default:
4227 goto undef;
4228 }
4229 if (opsize == OS_DOUBLE) {
4230 tmp32 = tcg_temp_new_i32();
4231 tcg_gen_mov_i32(tmp32, AREG(insn, 0));
4232 switch ((insn >> 3) & 7) {
4233 case 2:
4234 case 3:
4235 break;
4236 case 4:
4237 tcg_gen_addi_i32(tmp32, tmp32, -8);
4238 break;
4239 case 5:
4240 offset = cpu_ldsw_code(env, s->pc);
4241 s->pc += 2;
4242 tcg_gen_addi_i32(tmp32, tmp32, offset);
4243 break;
4244 case 7:
4245 offset = cpu_ldsw_code(env, s->pc);
4246 offset += s->pc - 2;
4247 s->pc += 2;
4248 tcg_gen_addi_i32(tmp32, tmp32, offset);
4249 break;
4250 default:
4251 goto undef;
4252 }
4253 src = gen_load64(s, tmp32);
4254 switch ((insn >> 3) & 7) {
4255 case 3:
4256 tcg_gen_addi_i32(tmp32, tmp32, 8);
4257 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
4258 break;
4259 case 4:
4260 tcg_gen_mov_i32(AREG(insn, 0), tmp32);
4261 break;
4262 }
4263 tcg_temp_free_i32(tmp32);
4264 } else {
4265 SRC_EA(env, tmp32, opsize, 1, NULL);
4266 src = tcg_temp_new_i64();
4267 switch (opsize) {
4268 case OS_LONG:
4269 case OS_WORD:
4270 case OS_BYTE:
4271 gen_helper_i32_to_f64(src, cpu_env, tmp32);
4272 break;
4273 case OS_SINGLE:
4274 gen_helper_f32_to_f64(src, cpu_env, tmp32);
4275 break;
4276 }
4277 }
4278 } else {
4279 /* Source register. */
4280 src = FREG(ext, 10);
4281 }
4282 dest = FREG(ext, 7);
4283 res = tcg_temp_new_i64();
4284 if (opmode != 0x3a)
4285 tcg_gen_mov_f64(res, dest);
4286 round = 1;
4287 set_dest = 1;
4288 switch (opmode) {
4289 case 0: case 0x40: case 0x44: /* fmove */
4290 tcg_gen_mov_f64(res, src);
4291 break;
4292 case 1: /* fint */
4293 gen_helper_iround_f64(res, cpu_env, src);
4294 round = 0;
4295 break;
4296 case 3: /* fintrz */
4297 gen_helper_itrunc_f64(res, cpu_env, src);
4298 round = 0;
4299 break;
4300 case 4: case 0x41: case 0x45: /* fsqrt */
4301 gen_helper_sqrt_f64(res, cpu_env, src);
4302 break;
4303 case 0x18: case 0x58: case 0x5c: /* fabs */
4304 gen_helper_abs_f64(res, src);
4305 break;
4306 case 0x1a: case 0x5a: case 0x5e: /* fneg */
4307 gen_helper_chs_f64(res, src);
4308 break;
4309 case 0x20: case 0x60: case 0x64: /* fdiv */
4310 gen_helper_div_f64(res, cpu_env, res, src);
4311 break;
4312 case 0x22: case 0x62: case 0x66: /* fadd */
4313 gen_helper_add_f64(res, cpu_env, res, src);
4314 break;
4315 case 0x23: case 0x63: case 0x67: /* fmul */
4316 gen_helper_mul_f64(res, cpu_env, res, src);
4317 break;
4318 case 0x28: case 0x68: case 0x6c: /* fsub */
4319 gen_helper_sub_f64(res, cpu_env, res, src);
4320 break;
4321 case 0x38: /* fcmp */
4322 gen_helper_sub_cmp_f64(res, cpu_env, res, src);
4323 set_dest = 0;
4324 round = 0;
4325 break;
4326 case 0x3a: /* ftst */
4327 tcg_gen_mov_f64(res, src);
4328 set_dest = 0;
4329 round = 0;
4330 break;
4331 default:
4332 goto undef;
4333 }
4334 if (ext & (1 << 14)) {
4335 tcg_temp_free_i64(src);
4336 }
4337 if (round) {
4338 if (opmode & 0x40) {
4339 if ((opmode & 0x4) != 0)
4340 round = 0;
4341 } else if ((s->fpcr & M68K_FPCR_PREC) == 0) {
4342 round = 0;
4343 }
4344 }
4345 if (round) {
4346 TCGv tmp = tcg_temp_new_i32();
4347 gen_helper_f64_to_f32(tmp, cpu_env, res);
4348 gen_helper_f32_to_f64(res, cpu_env, tmp);
4349 tcg_temp_free_i32(tmp);
4350 }
4351 tcg_gen_mov_f64(QREG_FP_RESULT, res);
4352 if (set_dest) {
4353 tcg_gen_mov_f64(dest, res);
4354 }
4355 tcg_temp_free_i64(res);
4356 return;
4357 undef:
4358 /* FIXME: Is this right for offset addressing modes? */
4359 s->pc -= 2;
4360 disas_undef_fpu(env, s, insn);
4361 }
4362
4363 DISAS_INSN(fbcc)
4364 {
4365 uint32_t offset;
4366 uint32_t addr;
4367 TCGv flag;
4368 TCGLabel *l1;
4369
4370 addr = s->pc;
4371 offset = cpu_ldsw_code(env, s->pc);
4372 s->pc += 2;
4373 if (insn & (1 << 6)) {
4374 offset = (offset << 16) | read_im16(env, s);
4375 }
4376
4377 l1 = gen_new_label();
4378 /* TODO: Raise BSUN exception. */
4379 flag = tcg_temp_new();
4380 gen_helper_compare_f64(flag, cpu_env, QREG_FP_RESULT);
4381 /* Jump to l1 if condition is true. */
4382 switch (insn & 0xf) {
4383 case 0: /* f */
4384 break;
4385 case 1: /* eq (=0) */
4386 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
4387 break;
4388 case 2: /* ogt (=1) */
4389 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(1), l1);
4390 break;
4391 case 3: /* oge (=0 or =1) */
4392 tcg_gen_brcond_i32(TCG_COND_LEU, flag, tcg_const_i32(1), l1);
4393 break;
4394 case 4: /* olt (=-1) */
4395 tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(0), l1);
4396 break;
4397 case 5: /* ole (=-1 or =0) */
4398 tcg_gen_brcond_i32(TCG_COND_LE, flag, tcg_const_i32(0), l1);
4399 break;
4400 case 6: /* ogl (=-1 or =1) */
4401 tcg_gen_andi_i32(flag, flag, 1);
4402 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
4403 break;
4404 case 7: /* or (=2) */
4405 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(2), l1);
4406 break;
4407 case 8: /* un (<2) */
4408 tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(2), l1);
4409 break;
4410 case 9: /* ueq (=0 or =2) */
4411 tcg_gen_andi_i32(flag, flag, 1);
4412 tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
4413 break;
4414 case 10: /* ugt (>0) */
4415 tcg_gen_brcond_i32(TCG_COND_GT, flag, tcg_const_i32(0), l1);
4416 break;
4417 case 11: /* uge (>=0) */
4418 tcg_gen_brcond_i32(TCG_COND_GE, flag, tcg_const_i32(0), l1);
4419 break;
4420 case 12: /* ult (=-1 or =2) */
4421 tcg_gen_brcond_i32(TCG_COND_GEU, flag, tcg_const_i32(2), l1);
4422 break;
4423 case 13: /* ule (!=1) */
4424 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(1), l1);
4425 break;
4426 case 14: /* ne (!=0) */
4427 tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
4428 break;
4429 case 15: /* t */
4430 tcg_gen_br(l1);
4431 break;
4432 }
4433 gen_jmp_tb(s, 0, s->pc);
4434 gen_set_label(l1);
4435 gen_jmp_tb(s, 1, addr + offset);
4436 }
4437
4438 DISAS_INSN(frestore)
4439 {
4440 M68kCPU *cpu = m68k_env_get_cpu(env);
4441
4442 /* TODO: Implement frestore. */
4443 cpu_abort(CPU(cpu), "FRESTORE not implemented");
4444 }
4445
4446 DISAS_INSN(fsave)
4447 {
4448 M68kCPU *cpu = m68k_env_get_cpu(env);
4449
4450 /* TODO: Implement fsave. */
4451 cpu_abort(CPU(cpu), "FSAVE not implemented");
4452 }
4453
4454 static inline TCGv gen_mac_extract_word(DisasContext *s, TCGv val, int upper)
4455 {
4456 TCGv tmp = tcg_temp_new();
4457 if (s->env->macsr & MACSR_FI) {
4458 if (upper)
4459 tcg_gen_andi_i32(tmp, val, 0xffff0000);
4460 else
4461 tcg_gen_shli_i32(tmp, val, 16);
4462 } else if (s->env->macsr & MACSR_SU) {
4463 if (upper)
4464 tcg_gen_sari_i32(tmp, val, 16);
4465 else
4466 tcg_gen_ext16s_i32(tmp, val);
4467 } else {
4468 if (upper)
4469 tcg_gen_shri_i32(tmp, val, 16);
4470 else
4471 tcg_gen_ext16u_i32(tmp, val);
4472 }
4473 return tmp;
4474 }
4475
4476 static void gen_mac_clear_flags(void)
4477 {
4478 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR,
4479 ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV));
4480 }
4481
4482 DISAS_INSN(mac)
4483 {
4484 TCGv rx;
4485 TCGv ry;
4486 uint16_t ext;
4487 int acc;
4488 TCGv tmp;
4489 TCGv addr;
4490 TCGv loadval;
4491 int dual;
4492 TCGv saved_flags;
4493
4494 if (!s->done_mac) {
4495 s->mactmp = tcg_temp_new_i64();
4496 s->done_mac = 1;
4497 }
4498
4499 ext = read_im16(env, s);
4500
4501 acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
4502 dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
4503 if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) {
4504 disas_undef(env, s, insn);
4505 return;
4506 }
4507 if (insn & 0x30) {
4508 /* MAC with load. */
4509 tmp = gen_lea(env, s, insn, OS_LONG);
4510 addr = tcg_temp_new();
4511 tcg_gen_and_i32(addr, tmp, QREG_MAC_MASK);
4512 /* Load the value now to ensure correct exception behavior.
4513 Perform writeback after reading the MAC inputs. */
4514 loadval = gen_load(s, OS_LONG, addr, 0);
4515
4516 acc ^= 1;
4517 rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
4518 ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
4519 } else {
4520 loadval = addr = NULL_QREG;
4521 rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
4522 ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
4523 }
4524
4525 gen_mac_clear_flags();
4526 #if 0
4527 l1 = -1;
4528 /* Disabled because conditional branches clobber temporary vars. */
4529 if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
4530 /* Skip the multiply if we know we will ignore it. */
4531 l1 = gen_new_label();
4532 tmp = tcg_temp_new();
4533 tcg_gen_andi_i32(tmp, QREG_MACSR, 1 << (acc + 8));
4534 gen_op_jmp_nz32(tmp, l1);
4535 }
4536 #endif
4537
4538 if ((ext & 0x0800) == 0) {
4539 /* Word. */
4540 rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
4541 ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
4542 }
4543 if (s->env->macsr & MACSR_FI) {
4544 gen_helper_macmulf(s->mactmp, cpu_env, rx, ry);
4545 } else {
4546 if (s->env->macsr & MACSR_SU)
4547 gen_helper_macmuls(s->mactmp, cpu_env, rx, ry);
4548 else
4549 gen_helper_macmulu(s->mactmp, cpu_env, rx, ry);
4550 switch ((ext >> 9) & 3) {
4551 case 1:
4552 tcg_gen_shli_i64(s->mactmp, s->mactmp, 1);
4553 break;
4554 case 3:
4555 tcg_gen_shri_i64(s->mactmp, s->mactmp, 1);
4556 break;
4557 }
4558 }
4559
4560 if (dual) {
4561 /* Save the overflow flag from the multiply. */
4562 saved_flags = tcg_temp_new();
4563 tcg_gen_mov_i32(saved_flags, QREG_MACSR);
4564 } else {
4565 saved_flags = NULL_QREG;
4566 }
4567
4568 #if 0
4569 /* Disabled because conditional branches clobber temporary vars. */
4570 if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
4571 /* Skip the accumulate if the value is already saturated. */
4572 l1 = gen_new_label();
4573 tmp = tcg_temp_new();
4574 gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
4575 gen_op_jmp_nz32(tmp, l1);
4576 }
4577 #endif
4578
4579 if (insn & 0x100)
4580 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
4581 else
4582 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
4583
4584 if (s->env->macsr & MACSR_FI)
4585 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
4586 else if (s->env->macsr & MACSR_SU)
4587 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
4588 else
4589 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
4590
4591 #if 0
4592 /* Disabled because conditional branches clobber temporary vars. */
4593 if (l1 != -1)
4594 gen_set_label(l1);
4595 #endif
4596
4597 if (dual) {
4598 /* Dual accumulate variant. */
4599 acc = (ext >> 2) & 3;
4600 /* Restore the overflow flag from the multiplier. */
4601 tcg_gen_mov_i32(QREG_MACSR, saved_flags);
4602 #if 0
4603 /* Disabled because conditional branches clobber temporary vars. */
4604 if ((s->env->macsr & MACSR_OMC) != 0) {
4605 /* Skip the accumulate if the value is already saturated. */
4606 l1 = gen_new_label();
4607 tmp = tcg_temp_new();
4608 gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
4609 gen_op_jmp_nz32(tmp, l1);
4610 }
4611 #endif
4612 if (ext & 2)
4613 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
4614 else
4615 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
4616 if (s->env->macsr & MACSR_FI)
4617 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
4618 else if (s->env->macsr & MACSR_SU)
4619 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
4620 else
4621 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
4622 #if 0
4623 /* Disabled because conditional branches clobber temporary vars. */
4624 if (l1 != -1)
4625 gen_set_label(l1);
4626 #endif
4627 }
4628 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(acc));
4629
4630 if (insn & 0x30) {
4631 TCGv rw;
4632 rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
4633 tcg_gen_mov_i32(rw, loadval);
4634 /* FIXME: Should address writeback happen with the masked or
4635 unmasked value? */
4636 switch ((insn >> 3) & 7) {
4637 case 3: /* Post-increment. */
4638 tcg_gen_addi_i32(AREG(insn, 0), addr, 4);
4639 break;
4640 case 4: /* Pre-decrement. */
4641 tcg_gen_mov_i32(AREG(insn, 0), addr);
4642 }
4643 }
4644 }
4645
4646 DISAS_INSN(from_mac)
4647 {
4648 TCGv rx;
4649 TCGv_i64 acc;
4650 int accnum;
4651
4652 rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
4653 accnum = (insn >> 9) & 3;
4654 acc = MACREG(accnum);
4655 if (s->env->macsr & MACSR_FI) {
4656 gen_helper_get_macf(rx, cpu_env, acc);
4657 } else if ((s->env->macsr & MACSR_OMC) == 0) {
4658 tcg_gen_extrl_i64_i32(rx, acc);
4659 } else if (s->env->macsr & MACSR_SU) {
4660 gen_helper_get_macs(rx, acc);
4661 } else {
4662 gen_helper_get_macu(rx, acc);
4663 }
4664 if (insn & 0x40) {
4665 tcg_gen_movi_i64(acc, 0);
4666 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
4667 }
4668 }
4669
4670 DISAS_INSN(move_mac)
4671 {
4672 /* FIXME: This can be done without a helper. */
4673 int src;
4674 TCGv dest;
4675 src = insn & 3;
4676 dest = tcg_const_i32((insn >> 9) & 3);
4677 gen_helper_mac_move(cpu_env, dest, tcg_const_i32(src));
4678 gen_mac_clear_flags();
4679 gen_helper_mac_set_flags(cpu_env, dest);
4680 }
4681
4682 DISAS_INSN(from_macsr)
4683 {
4684 TCGv reg;
4685
4686 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
4687 tcg_gen_mov_i32(reg, QREG_MACSR);
4688 }
4689
4690 DISAS_INSN(from_mask)
4691 {
4692 TCGv reg;
4693 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
4694 tcg_gen_mov_i32(reg, QREG_MAC_MASK);
4695 }
4696
4697 DISAS_INSN(from_mext)
4698 {
4699 TCGv reg;
4700 TCGv acc;
4701 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
4702 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
4703 if (s->env->macsr & MACSR_FI)
4704 gen_helper_get_mac_extf(reg, cpu_env, acc);
4705 else
4706 gen_helper_get_mac_exti(reg, cpu_env, acc);
4707 }
4708
4709 DISAS_INSN(macsr_to_ccr)
4710 {
4711 TCGv tmp = tcg_temp_new();
4712 tcg_gen_andi_i32(tmp, QREG_MACSR, 0xf);
4713 gen_helper_set_sr(cpu_env, tmp);
4714 tcg_temp_free(tmp);
4715 set_cc_op(s, CC_OP_FLAGS);
4716 }
4717
4718 DISAS_INSN(to_mac)
4719 {
4720 TCGv_i64 acc;
4721 TCGv val;
4722 int accnum;
4723 accnum = (insn >> 9) & 3;
4724 acc = MACREG(accnum);
4725 SRC_EA(env, val, OS_LONG, 0, NULL);
4726 if (s->env->macsr & MACSR_FI) {
4727 tcg_gen_ext_i32_i64(acc, val);
4728 tcg_gen_shli_i64(acc, acc, 8);
4729 } else if (s->env->macsr & MACSR_SU) {
4730 tcg_gen_ext_i32_i64(acc, val);
4731 } else {
4732 tcg_gen_extu_i32_i64(acc, val);
4733 }
4734 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
4735 gen_mac_clear_flags();
4736 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(accnum));
4737 }
4738
4739 DISAS_INSN(to_macsr)
4740 {
4741 TCGv val;
4742 SRC_EA(env, val, OS_LONG, 0, NULL);
4743 gen_helper_set_macsr(cpu_env, val);
4744 gen_lookup_tb(s);
4745 }
4746
4747 DISAS_INSN(to_mask)
4748 {
4749 TCGv val;
4750 SRC_EA(env, val, OS_LONG, 0, NULL);
4751 tcg_gen_ori_i32(QREG_MAC_MASK, val, 0xffff0000);
4752 }
4753
4754 DISAS_INSN(to_mext)
4755 {
4756 TCGv val;
4757 TCGv acc;
4758 SRC_EA(env, val, OS_LONG, 0, NULL);
4759 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
4760 if (s->env->macsr & MACSR_FI)
4761 gen_helper_set_mac_extf(cpu_env, val, acc);
4762 else if (s->env->macsr & MACSR_SU)
4763 gen_helper_set_mac_exts(cpu_env, val, acc);
4764 else
4765 gen_helper_set_mac_extu(cpu_env, val, acc);
4766 }
4767
4768 static disas_proc opcode_table[65536];
4769
4770 static void
4771 register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
4772 {
4773 int i;
4774 int from;
4775 int to;
4776
4777 /* Sanity check. All set bits must be included in the mask. */
4778 if (opcode & ~mask) {
4779 fprintf(stderr,
4780 "qemu internal error: bogus opcode definition %04x/%04x\n",
4781 opcode, mask);
4782 abort();
4783 }
4784 /* This could probably be cleverer. For now just optimize the case where
4785 the top bits are known. */
4786 /* Find the first zero bit in the mask. */
4787 i = 0x8000;
4788 while ((i & mask) != 0)
4789 i >>= 1;
4790 /* Iterate over all combinations of this and lower bits. */
4791 if (i == 0)
4792 i = 1;
4793 else
4794 i <<= 1;
4795 from = opcode & ~(i - 1);
4796 to = from + i;
4797 for (i = from; i < to; i++) {
4798 if ((i & mask) == opcode)
4799 opcode_table[i] = proc;
4800 }
4801 }
4802
4803 /* Register m68k opcode handlers. Order is important.
4804 Later insn override earlier ones. */
4805 void register_m68k_insns (CPUM68KState *env)
4806 {
4807 /* Build the opcode table only once to avoid
4808 multithreading issues. */
4809 if (opcode_table[0] != NULL) {
4810 return;
4811 }
4812
4813 /* use BASE() for instruction available
4814 * for CF_ISA_A and M68000.
4815 */
4816 #define BASE(name, opcode, mask) \
4817 register_opcode(disas_##name, 0x##opcode, 0x##mask)
4818 #define INSN(name, opcode, mask, feature) do { \
4819 if (m68k_feature(env, M68K_FEATURE_##feature)) \
4820 BASE(name, opcode, mask); \
4821 } while(0)
4822 BASE(undef, 0000, 0000);
4823 INSN(arith_im, 0080, fff8, CF_ISA_A);
4824 INSN(arith_im, 0000, ff00, M68000);
4825 INSN(undef, 00c0, ffc0, M68000);
4826 INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
4827 BASE(bitop_reg, 0100, f1c0);
4828 BASE(bitop_reg, 0140, f1c0);
4829 BASE(bitop_reg, 0180, f1c0);
4830 BASE(bitop_reg, 01c0, f1c0);
4831 INSN(arith_im, 0280, fff8, CF_ISA_A);
4832 INSN(arith_im, 0200, ff00, M68000);
4833 INSN(undef, 02c0, ffc0, M68000);
4834 INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
4835 INSN(arith_im, 0480, fff8, CF_ISA_A);
4836 INSN(arith_im, 0400, ff00, M68000);
4837 INSN(undef, 04c0, ffc0, M68000);
4838 INSN(arith_im, 0600, ff00, M68000);
4839 INSN(undef, 06c0, ffc0, M68000);
4840 INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
4841 INSN(arith_im, 0680, fff8, CF_ISA_A);
4842 INSN(arith_im, 0c00, ff38, CF_ISA_A);
4843 INSN(arith_im, 0c00, ff00, M68000);
4844 BASE(bitop_im, 0800, ffc0);
4845 BASE(bitop_im, 0840, ffc0);
4846 BASE(bitop_im, 0880, ffc0);
4847 BASE(bitop_im, 08c0, ffc0);
4848 INSN(arith_im, 0a80, fff8, CF_ISA_A);
4849 INSN(arith_im, 0a00, ff00, M68000);
4850 INSN(cas, 0ac0, ffc0, CAS);
4851 INSN(cas, 0cc0, ffc0, CAS);
4852 INSN(cas, 0ec0, ffc0, CAS);
4853 INSN(cas2w, 0cfc, ffff, CAS);
4854 INSN(cas2l, 0efc, ffff, CAS);
4855 BASE(move, 1000, f000);
4856 BASE(move, 2000, f000);
4857 BASE(move, 3000, f000);
4858 INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC);
4859 INSN(negx, 4080, fff8, CF_ISA_A);
4860 INSN(negx, 4000, ff00, M68000);
4861 INSN(undef, 40c0, ffc0, M68000);
4862 INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
4863 INSN(move_from_sr, 40c0, ffc0, M68000);
4864 BASE(lea, 41c0, f1c0);
4865 BASE(clr, 4200, ff00);
4866 BASE(undef, 42c0, ffc0);
4867 INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
4868 INSN(move_from_ccr, 42c0, ffc0, M68000);
4869 INSN(neg, 4480, fff8, CF_ISA_A);
4870 INSN(neg, 4400, ff00, M68000);
4871 INSN(undef, 44c0, ffc0, M68000);
4872 BASE(move_to_ccr, 44c0, ffc0);
4873 INSN(not, 4680, fff8, CF_ISA_A);
4874 INSN(not, 4600, ff00, M68000);
4875 INSN(undef, 46c0, ffc0, M68000);
4876 INSN(move_to_sr, 46c0, ffc0, CF_ISA_A);
4877 INSN(nbcd, 4800, ffc0, M68000);
4878 INSN(linkl, 4808, fff8, M68000);
4879 BASE(pea, 4840, ffc0);
4880 BASE(swap, 4840, fff8);
4881 INSN(bkpt, 4848, fff8, BKPT);
4882 INSN(movem, 48d0, fbf8, CF_ISA_A);
4883 INSN(movem, 48e8, fbf8, CF_ISA_A);
4884 INSN(movem, 4880, fb80, M68000);
4885 BASE(ext, 4880, fff8);
4886 BASE(ext, 48c0, fff8);
4887 BASE(ext, 49c0, fff8);
4888 BASE(tst, 4a00, ff00);
4889 INSN(tas, 4ac0, ffc0, CF_ISA_B);
4890 INSN(tas, 4ac0, ffc0, M68000);
4891 INSN(halt, 4ac8, ffff, CF_ISA_A);
4892 INSN(pulse, 4acc, ffff, CF_ISA_A);
4893 BASE(illegal, 4afc, ffff);
4894 INSN(mull, 4c00, ffc0, CF_ISA_A);
4895 INSN(mull, 4c00, ffc0, LONG_MULDIV);
4896 INSN(divl, 4c40, ffc0, CF_ISA_A);
4897 INSN(divl, 4c40, ffc0, LONG_MULDIV);
4898 INSN(sats, 4c80, fff8, CF_ISA_B);
4899 BASE(trap, 4e40, fff0);
4900 BASE(link, 4e50, fff8);
4901 BASE(unlk, 4e58, fff8);
4902 INSN(move_to_usp, 4e60, fff8, USP);
4903 INSN(move_from_usp, 4e68, fff8, USP);
4904 BASE(nop, 4e71, ffff);
4905 BASE(stop, 4e72, ffff);
4906 BASE(rte, 4e73, ffff);
4907 BASE(rts, 4e75, ffff);
4908 INSN(movec, 4e7b, ffff, CF_ISA_A);
4909 BASE(jump, 4e80, ffc0);
4910 BASE(jump, 4ec0, ffc0);
4911 INSN(addsubq, 5000, f080, M68000);
4912 BASE(addsubq, 5080, f0c0);
4913 INSN(scc, 50c0, f0f8, CF_ISA_A); /* Scc.B Dx */
4914 INSN(scc, 50c0, f0c0, M68000); /* Scc.B <EA> */
4915 INSN(dbcc, 50c8, f0f8, M68000);
4916 INSN(tpf, 51f8, fff8, CF_ISA_A);
4917
4918 /* Branch instructions. */
4919 BASE(branch, 6000, f000);
4920 /* Disable long branch instructions, then add back the ones we want. */
4921 BASE(undef, 60ff, f0ff); /* All long branches. */
4922 INSN(branch, 60ff, f0ff, CF_ISA_B);
4923 INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */
4924 INSN(branch, 60ff, ffff, BRAL);
4925 INSN(branch, 60ff, f0ff, BCCL);
4926
4927 BASE(moveq, 7000, f100);
4928 INSN(mvzs, 7100, f100, CF_ISA_B);
4929 BASE(or, 8000, f000);
4930 BASE(divw, 80c0, f0c0);
4931 INSN(sbcd_reg, 8100, f1f8, M68000);
4932 INSN(sbcd_mem, 8108, f1f8, M68000);
4933 BASE(addsub, 9000, f000);
4934 INSN(undef, 90c0, f0c0, CF_ISA_A);
4935 INSN(subx_reg, 9180, f1f8, CF_ISA_A);
4936 INSN(subx_reg, 9100, f138, M68000);
4937 INSN(subx_mem, 9108, f138, M68000);
4938 INSN(suba, 91c0, f1c0, CF_ISA_A);
4939 INSN(suba, 90c0, f0c0, M68000);
4940
4941 BASE(undef_mac, a000, f000);
4942 INSN(mac, a000, f100, CF_EMAC);
4943 INSN(from_mac, a180, f9b0, CF_EMAC);
4944 INSN(move_mac, a110, f9fc, CF_EMAC);
4945 INSN(from_macsr,a980, f9f0, CF_EMAC);
4946 INSN(from_mask, ad80, fff0, CF_EMAC);
4947 INSN(from_mext, ab80, fbf0, CF_EMAC);
4948 INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
4949 INSN(to_mac, a100, f9c0, CF_EMAC);
4950 INSN(to_macsr, a900, ffc0, CF_EMAC);
4951 INSN(to_mext, ab00, fbc0, CF_EMAC);
4952 INSN(to_mask, ad00, ffc0, CF_EMAC);
4953
4954 INSN(mov3q, a140, f1c0, CF_ISA_B);
4955 INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
4956 INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
4957 INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
4958 INSN(cmp, b080, f1c0, CF_ISA_A);
4959 INSN(cmpa, b1c0, f1c0, CF_ISA_A);
4960 INSN(cmp, b000, f100, M68000);
4961 INSN(eor, b100, f100, M68000);
4962 INSN(cmpm, b108, f138, M68000);
4963 INSN(cmpa, b0c0, f0c0, M68000);
4964 INSN(eor, b180, f1c0, CF_ISA_A);
4965 BASE(and, c000, f000);
4966 INSN(exg_dd, c140, f1f8, M68000);
4967 INSN(exg_aa, c148, f1f8, M68000);
4968 INSN(exg_da, c188, f1f8, M68000);
4969 BASE(mulw, c0c0, f0c0);
4970 INSN(abcd_reg, c100, f1f8, M68000);
4971 INSN(abcd_mem, c108, f1f8, M68000);
4972 BASE(addsub, d000, f000);
4973 INSN(undef, d0c0, f0c0, CF_ISA_A);
4974 INSN(addx_reg, d180, f1f8, CF_ISA_A);
4975 INSN(addx_reg, d100, f138, M68000);
4976 INSN(addx_mem, d108, f138, M68000);
4977 INSN(adda, d1c0, f1c0, CF_ISA_A);
4978 INSN(adda, d0c0, f0c0, M68000);
4979 INSN(shift_im, e080, f0f0, CF_ISA_A);
4980 INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
4981 INSN(shift8_im, e000, f0f0, M68000);
4982 INSN(shift16_im, e040, f0f0, M68000);
4983 INSN(shift_im, e080, f0f0, M68000);
4984 INSN(shift8_reg, e020, f0f0, M68000);
4985 INSN(shift16_reg, e060, f0f0, M68000);
4986 INSN(shift_reg, e0a0, f0f0, M68000);
4987 INSN(shift_mem, e0c0, fcc0, M68000);
4988 INSN(rotate_im, e090, f0f0, M68000);
4989 INSN(rotate8_im, e010, f0f0, M68000);
4990 INSN(rotate16_im, e050, f0f0, M68000);
4991 INSN(rotate_reg, e0b0, f0f0, M68000);
4992 INSN(rotate8_reg, e030, f0f0, M68000);
4993 INSN(rotate16_reg, e070, f0f0, M68000);
4994 INSN(rotate_mem, e4c0, fcc0, M68000);
4995 INSN(bfext_mem, e9c0, fdc0, BITFIELD); /* bfextu & bfexts */
4996 INSN(bfext_reg, e9c0, fdf8, BITFIELD);
4997 INSN(bfins_mem, efc0, ffc0, BITFIELD);
4998 INSN(bfins_reg, efc0, fff8, BITFIELD);
4999 INSN(bfop_mem, eac0, ffc0, BITFIELD); /* bfchg */
5000 INSN(bfop_reg, eac0, fff8, BITFIELD); /* bfchg */
5001 INSN(bfop_mem, ecc0, ffc0, BITFIELD); /* bfclr */
5002 INSN(bfop_reg, ecc0, fff8, BITFIELD); /* bfclr */
5003 INSN(bfop_mem, edc0, ffc0, BITFIELD); /* bfffo */
5004 INSN(bfop_reg, edc0, fff8, BITFIELD); /* bfffo */
5005 INSN(bfop_mem, eec0, ffc0, BITFIELD); /* bfset */
5006 INSN(bfop_reg, eec0, fff8, BITFIELD); /* bfset */
5007 INSN(bfop_mem, e8c0, ffc0, BITFIELD); /* bftst */
5008 INSN(bfop_reg, e8c0, fff8, BITFIELD); /* bftst */
5009 INSN(undef_fpu, f000, f000, CF_ISA_A);
5010 INSN(fpu, f200, ffc0, CF_FPU);
5011 INSN(fbcc, f280, ffc0, CF_FPU);
5012 INSN(frestore, f340, ffc0, CF_FPU);
5013 INSN(fsave, f340, ffc0, CF_FPU);
5014 INSN(intouch, f340, ffc0, CF_ISA_A);
5015 INSN(cpushl, f428, ff38, CF_ISA_A);
5016 INSN(wddata, fb00, ff00, CF_ISA_A);
5017 INSN(wdebug, fbc0, ffc0, CF_ISA_A);
5018 #undef INSN
5019 }
5020
5021 /* ??? Some of this implementation is not exception safe. We should always
5022 write back the result to memory before setting the condition codes. */
5023 static void disas_m68k_insn(CPUM68KState * env, DisasContext *s)
5024 {
5025 uint16_t insn = read_im16(env, s);
5026 opcode_table[insn](env, s, insn);
5027 do_writebacks(s);
5028 }
5029
5030 /* generate intermediate code for basic block 'tb'. */
5031 void gen_intermediate_code(CPUM68KState *env, TranslationBlock *tb)
5032 {
5033 M68kCPU *cpu = m68k_env_get_cpu(env);
5034 CPUState *cs = CPU(cpu);
5035 DisasContext dc1, *dc = &dc1;
5036 target_ulong pc_start;
5037 int pc_offset;
5038 int num_insns;
5039 int max_insns;
5040
5041 /* generate intermediate code */
5042 pc_start = tb->pc;
5043
5044 dc->tb = tb;
5045
5046 dc->env = env;
5047 dc->is_jmp = DISAS_NEXT;
5048 dc->pc = pc_start;
5049 dc->cc_op = CC_OP_DYNAMIC;
5050 dc->cc_op_synced = 1;
5051 dc->singlestep_enabled = cs->singlestep_enabled;
5052 dc->fpcr = env->fpcr;
5053 dc->user = (env->sr & SR_S) == 0;
5054 dc->done_mac = 0;
5055 dc->writeback_mask = 0;
5056 num_insns = 0;
5057 max_insns = tb->cflags & CF_COUNT_MASK;
5058 if (max_insns == 0) {
5059 max_insns = CF_COUNT_MASK;
5060 }
5061 if (max_insns > TCG_MAX_INSNS) {
5062 max_insns = TCG_MAX_INSNS;
5063 }
5064
5065 gen_tb_start(tb);
5066 do {
5067 pc_offset = dc->pc - pc_start;
5068 gen_throws_exception = NULL;
5069 tcg_gen_insn_start(dc->pc, dc->cc_op);
5070 num_insns++;
5071
5072 if (unlikely(cpu_breakpoint_test(cs, dc->pc, BP_ANY))) {
5073 gen_exception(dc, dc->pc, EXCP_DEBUG);
5074 dc->is_jmp = DISAS_JUMP;
5075 /* The address covered by the breakpoint must be included in
5076 [tb->pc, tb->pc + tb->size) in order to for it to be
5077 properly cleared -- thus we increment the PC here so that
5078 the logic setting tb->size below does the right thing. */
5079 dc->pc += 2;
5080 break;
5081 }
5082
5083 if (num_insns == max_insns && (tb->cflags & CF_LAST_IO)) {
5084 gen_io_start();
5085 }
5086
5087 dc->insn_pc = dc->pc;
5088 disas_m68k_insn(env, dc);
5089 } while (!dc->is_jmp && !tcg_op_buf_full() &&
5090 !cs->singlestep_enabled &&
5091 !singlestep &&
5092 (pc_offset) < (TARGET_PAGE_SIZE - 32) &&
5093 num_insns < max_insns);
5094
5095 if (tb->cflags & CF_LAST_IO)
5096 gen_io_end();
5097 if (unlikely(cs->singlestep_enabled)) {
5098 /* Make sure the pc is updated, and raise a debug exception. */
5099 if (!dc->is_jmp) {
5100 update_cc_op(dc);
5101 tcg_gen_movi_i32(QREG_PC, dc->pc);
5102 }
5103 gen_helper_raise_exception(cpu_env, tcg_const_i32(EXCP_DEBUG));
5104 } else {
5105 switch(dc->is_jmp) {
5106 case DISAS_NEXT:
5107 update_cc_op(dc);
5108 gen_jmp_tb(dc, 0, dc->pc);
5109 break;
5110 default:
5111 case DISAS_JUMP:
5112 case DISAS_UPDATE:
5113 update_cc_op(dc);
5114 /* indicate that the hash table must be used to find the next TB */
5115 tcg_gen_exit_tb(0);
5116 break;
5117 case DISAS_TB_JUMP:
5118 /* nothing more to generate */
5119 break;
5120 }
5121 }
5122 gen_tb_end(tb, num_insns);
5123
5124 #ifdef DEBUG_DISAS
5125 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
5126 && qemu_log_in_addr_range(pc_start)) {
5127 qemu_log_lock();
5128 qemu_log("----------------\n");
5129 qemu_log("IN: %s\n", lookup_symbol(pc_start));
5130 log_target_disas(cs, pc_start, dc->pc - pc_start, 0);
5131 qemu_log("\n");
5132 qemu_log_unlock();
5133 }
5134 #endif
5135 tb->size = dc->pc - pc_start;
5136 tb->icount = num_insns;
5137 }
5138
5139 void m68k_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
5140 int flags)
5141 {
5142 M68kCPU *cpu = M68K_CPU(cs);
5143 CPUM68KState *env = &cpu->env;
5144 int i;
5145 uint16_t sr;
5146 CPU_DoubleU u;
5147 for (i = 0; i < 8; i++)
5148 {
5149 u.d = env->fregs[i];
5150 cpu_fprintf(f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n",
5151 i, env->dregs[i], i, env->aregs[i],
5152 i, u.l.upper, u.l.lower, *(double *)&u.d);
5153 }
5154 cpu_fprintf (f, "PC = %08x ", env->pc);
5155 sr = env->sr | cpu_m68k_get_ccr(env);
5156 cpu_fprintf(f, "SR = %04x %c%c%c%c%c ", sr, (sr & CCF_X) ? 'X' : '-',
5157 (sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-',
5158 (sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-');
5159 cpu_fprintf (f, "FPRESULT = %12g\n", *(double *)&env->fp_result);
5160 }
5161
5162 void restore_state_to_opc(CPUM68KState *env, TranslationBlock *tb,
5163 target_ulong *data)
5164 {
5165 int cc_op = data[1];
5166 env->pc = data[0];
5167 if (cc_op != CC_OP_DYNAMIC) {
5168 env->cc_op = cc_op;
5169 }
5170 }
AR7 emulation for QEMU