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MAINTAINERS: add Thomas as additional s390x maintainer
[qemu/kevin.git] / target / m68k / translate.c
blob3fc67aa45261c70b04b735f31c24edb4bffb7bd7
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 2.1 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 * Lesser 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/tcg-op.h"
26 #include "qemu/log.h"
27 #include "qemu/qemu-print.h"
28 #include "exec/cpu_ldst.h"
29 #include "exec/translator.h"
30
31 #include "exec/helper-proto.h"
32 #include "exec/helper-gen.h"
33
34 #include "trace-tcg.h"
35 #include "exec/log.h"
36 #include "fpu/softfloat.h"
37
38
39 //#define DEBUG_DISPATCH 1
40
41 #define DEFO32(name, offset) static TCGv QREG_##name;
42 #define DEFO64(name, offset) static TCGv_i64 QREG_##name;
43 #include "qregs.def"
44 #undef DEFO32
45 #undef DEFO64
46
47 static TCGv_i32 cpu_halted;
48 static TCGv_i32 cpu_exception_index;
49
50 static char cpu_reg_names[2 * 8 * 3 + 5 * 4];
51 static TCGv cpu_dregs[8];
52 static TCGv cpu_aregs[8];
53 static TCGv_i64 cpu_macc[4];
54
55 #define REG(insn, pos) (((insn) >> (pos)) & 7)
56 #define DREG(insn, pos) cpu_dregs[REG(insn, pos)]
57 #define AREG(insn, pos) get_areg(s, REG(insn, pos))
58 #define MACREG(acc) cpu_macc[acc]
59 #define QREG_SP get_areg(s, 7)
60
61 static TCGv NULL_QREG;
62 #define IS_NULL_QREG(t) (t == NULL_QREG)
63 /* Used to distinguish stores from bad addressing modes. */
64 static TCGv store_dummy;
65
66 #include "exec/gen-icount.h"
67
68 void m68k_tcg_init(void)
69 {
70 char *p;
71 int i;
72
73 #define DEFO32(name, offset) \
74 QREG_##name = tcg_global_mem_new_i32(cpu_env, \
75 offsetof(CPUM68KState, offset), #name);
76 #define DEFO64(name, offset) \
77 QREG_##name = tcg_global_mem_new_i64(cpu_env, \
78 offsetof(CPUM68KState, offset), #name);
79 #include "qregs.def"
80 #undef DEFO32
81 #undef DEFO64
82
83 cpu_halted = tcg_global_mem_new_i32(cpu_env,
84 -offsetof(M68kCPU, env) +
85 offsetof(CPUState, halted), "HALTED");
86 cpu_exception_index = tcg_global_mem_new_i32(cpu_env,
87 -offsetof(M68kCPU, env) +
88 offsetof(CPUState, exception_index),
89 "EXCEPTION");
90
91 p = cpu_reg_names;
92 for (i = 0; i < 8; i++) {
93 sprintf(p, "D%d", i);
94 cpu_dregs[i] = tcg_global_mem_new(cpu_env,
95 offsetof(CPUM68KState, dregs[i]), p);
96 p += 3;
97 sprintf(p, "A%d", i);
98 cpu_aregs[i] = tcg_global_mem_new(cpu_env,
99 offsetof(CPUM68KState, aregs[i]), p);
100 p += 3;
101 }
102 for (i = 0; i < 4; i++) {
103 sprintf(p, "ACC%d", i);
104 cpu_macc[i] = tcg_global_mem_new_i64(cpu_env,
105 offsetof(CPUM68KState, macc[i]), p);
106 p += 5;
107 }
108
109 NULL_QREG = tcg_global_mem_new(cpu_env, -4, "NULL");
110 store_dummy = tcg_global_mem_new(cpu_env, -8, "NULL");
111 }
112
113 /* internal defines */
114 typedef struct DisasContext {
115 DisasContextBase base;
116 CPUM68KState *env;
117 target_ulong pc;
118 CCOp cc_op; /* Current CC operation */
119 int cc_op_synced;
120 TCGv_i64 mactmp;
121 int done_mac;
122 int writeback_mask;
123 TCGv writeback[8];
124 #define MAX_TO_RELEASE 8
125 int release_count;
126 TCGv release[MAX_TO_RELEASE];
127 } DisasContext;
128
129 static void init_release_array(DisasContext *s)
130 {
131 #ifdef CONFIG_DEBUG_TCG
132 memset(s->release, 0, sizeof(s->release));
133 #endif
134 s->release_count = 0;
135 }
136
137 static void do_release(DisasContext *s)
138 {
139 int i;
140 for (i = 0; i < s->release_count; i++) {
141 tcg_temp_free(s->release[i]);
142 }
143 init_release_array(s);
144 }
145
146 static TCGv mark_to_release(DisasContext *s, TCGv tmp)
147 {
148 g_assert(s->release_count < MAX_TO_RELEASE);
149 return s->release[s->release_count++] = tmp;
150 }
151
152 static TCGv get_areg(DisasContext *s, unsigned regno)
153 {
154 if (s->writeback_mask & (1 << regno)) {
155 return s->writeback[regno];
156 } else {
157 return cpu_aregs[regno];
158 }
159 }
160
161 static void delay_set_areg(DisasContext *s, unsigned regno,
162 TCGv val, bool give_temp)
163 {
164 if (s->writeback_mask & (1 << regno)) {
165 if (give_temp) {
166 tcg_temp_free(s->writeback[regno]);
167 s->writeback[regno] = val;
168 } else {
169 tcg_gen_mov_i32(s->writeback[regno], val);
170 }
171 } else {
172 s->writeback_mask |= 1 << regno;
173 if (give_temp) {
174 s->writeback[regno] = val;
175 } else {
176 TCGv tmp = tcg_temp_new();
177 s->writeback[regno] = tmp;
178 tcg_gen_mov_i32(tmp, val);
179 }
180 }
181 }
182
183 static void do_writebacks(DisasContext *s)
184 {
185 unsigned mask = s->writeback_mask;
186 if (mask) {
187 s->writeback_mask = 0;
188 do {
189 unsigned regno = ctz32(mask);
190 tcg_gen_mov_i32(cpu_aregs[regno], s->writeback[regno]);
191 tcg_temp_free(s->writeback[regno]);
192 mask &= mask - 1;
193 } while (mask);
194 }
195 }
196
197 /* is_jmp field values */
198 #define DISAS_JUMP DISAS_TARGET_0 /* only pc was modified dynamically */
199 #define DISAS_EXIT DISAS_TARGET_1 /* cpu state was modified dynamically */
200
201 #if defined(CONFIG_USER_ONLY)
202 #define IS_USER(s) 1
203 #else
204 #define IS_USER(s) (!(s->base.tb->flags & TB_FLAGS_MSR_S))
205 #define SFC_INDEX(s) ((s->base.tb->flags & TB_FLAGS_SFC_S) ? \
206 MMU_KERNEL_IDX : MMU_USER_IDX)
207 #define DFC_INDEX(s) ((s->base.tb->flags & TB_FLAGS_DFC_S) ? \
208 MMU_KERNEL_IDX : MMU_USER_IDX)
209 #endif
210
211 typedef void (*disas_proc)(CPUM68KState *env, DisasContext *s, uint16_t insn);
212
213 #ifdef DEBUG_DISPATCH
214 #define DISAS_INSN(name) \
215 static void real_disas_##name(CPUM68KState *env, DisasContext *s, \
216 uint16_t insn); \
217 static void disas_##name(CPUM68KState *env, DisasContext *s, \
218 uint16_t insn) \
219 { \
220 qemu_log("Dispatch " #name "\n"); \
221 real_disas_##name(env, s, insn); \
222 } \
223 static void real_disas_##name(CPUM68KState *env, DisasContext *s, \
224 uint16_t insn)
225 #else
226 #define DISAS_INSN(name) \
227 static void disas_##name(CPUM68KState *env, DisasContext *s, \
228 uint16_t insn)
229 #endif
230
231 static const uint8_t cc_op_live[CC_OP_NB] = {
232 [CC_OP_DYNAMIC] = CCF_C | CCF_V | CCF_Z | CCF_N | CCF_X,
233 [CC_OP_FLAGS] = CCF_C | CCF_V | CCF_Z | CCF_N | CCF_X,
234 [CC_OP_ADDB ... CC_OP_ADDL] = CCF_X | CCF_N | CCF_V,
235 [CC_OP_SUBB ... CC_OP_SUBL] = CCF_X | CCF_N | CCF_V,
236 [CC_OP_CMPB ... CC_OP_CMPL] = CCF_X | CCF_N | CCF_V,
237 [CC_OP_LOGIC] = CCF_X | CCF_N
238 };
239
240 static void set_cc_op(DisasContext *s, CCOp op)
241 {
242 CCOp old_op = s->cc_op;
243 int dead;
244
245 if (old_op == op) {
246 return;
247 }
248 s->cc_op = op;
249 s->cc_op_synced = 0;
250
251 /*
252 * Discard CC computation that will no longer be used.
253 * Note that X and N are never dead.
254 */
255 dead = cc_op_live[old_op] & ~cc_op_live[op];
256 if (dead & CCF_C) {
257 tcg_gen_discard_i32(QREG_CC_C);
258 }
259 if (dead & CCF_Z) {
260 tcg_gen_discard_i32(QREG_CC_Z);
261 }
262 if (dead & CCF_V) {
263 tcg_gen_discard_i32(QREG_CC_V);
264 }
265 }
266
267 /* Update the CPU env CC_OP state. */
268 static void update_cc_op(DisasContext *s)
269 {
270 if (!s->cc_op_synced) {
271 s->cc_op_synced = 1;
272 tcg_gen_movi_i32(QREG_CC_OP, s->cc_op);
273 }
274 }
275
276 /* Generate a jump to an immediate address. */
277 static void gen_jmp_im(DisasContext *s, uint32_t dest)
278 {
279 update_cc_op(s);
280 tcg_gen_movi_i32(QREG_PC, dest);
281 s->base.is_jmp = DISAS_JUMP;
282 }
283
284 /* Generate a jump to the address in qreg DEST. */
285 static void gen_jmp(DisasContext *s, TCGv dest)
286 {
287 update_cc_op(s);
288 tcg_gen_mov_i32(QREG_PC, dest);
289 s->base.is_jmp = DISAS_JUMP;
290 }
291
292 static void gen_raise_exception(int nr)
293 {
294 TCGv_i32 tmp;
295
296 tmp = tcg_const_i32(nr);
297 gen_helper_raise_exception(cpu_env, tmp);
298 tcg_temp_free_i32(tmp);
299 }
300
301 static void gen_exception(DisasContext *s, uint32_t dest, int nr)
302 {
303 update_cc_op(s);
304 tcg_gen_movi_i32(QREG_PC, dest);
305
306 gen_raise_exception(nr);
307
308 s->base.is_jmp = DISAS_NORETURN;
309 }
310
311 static inline void gen_addr_fault(DisasContext *s)
312 {
313 gen_exception(s, s->base.pc_next, EXCP_ADDRESS);
314 }
315
316 /*
317 * Generate a load from the specified address. Narrow values are
318 * sign extended to full register width.
319 */
320 static inline TCGv gen_load(DisasContext *s, int opsize, TCGv addr,
321 int sign, int index)
322 {
323 TCGv tmp;
324 tmp = tcg_temp_new_i32();
325 switch(opsize) {
326 case OS_BYTE:
327 if (sign)
328 tcg_gen_qemu_ld8s(tmp, addr, index);
329 else
330 tcg_gen_qemu_ld8u(tmp, addr, index);
331 break;
332 case OS_WORD:
333 if (sign)
334 tcg_gen_qemu_ld16s(tmp, addr, index);
335 else
336 tcg_gen_qemu_ld16u(tmp, addr, index);
337 break;
338 case OS_LONG:
339 tcg_gen_qemu_ld32u(tmp, addr, index);
340 break;
341 default:
342 g_assert_not_reached();
343 }
344 return tmp;
345 }
346
347 /* Generate a store. */
348 static inline void gen_store(DisasContext *s, int opsize, TCGv addr, TCGv val,
349 int index)
350 {
351 switch(opsize) {
352 case OS_BYTE:
353 tcg_gen_qemu_st8(val, addr, index);
354 break;
355 case OS_WORD:
356 tcg_gen_qemu_st16(val, addr, index);
357 break;
358 case OS_LONG:
359 tcg_gen_qemu_st32(val, addr, index);
360 break;
361 default:
362 g_assert_not_reached();
363 }
364 }
365
366 typedef enum {
367 EA_STORE,
368 EA_LOADU,
369 EA_LOADS
370 } ea_what;
371
372 /*
373 * Generate an unsigned load if VAL is 0 a signed load if val is -1,
374 * otherwise generate a store.
375 */
376 static TCGv gen_ldst(DisasContext *s, int opsize, TCGv addr, TCGv val,
377 ea_what what, int index)
378 {
379 if (what == EA_STORE) {
380 gen_store(s, opsize, addr, val, index);
381 return store_dummy;
382 } else {
383 return mark_to_release(s, gen_load(s, opsize, addr,
384 what == EA_LOADS, index));
385 }
386 }
387
388 /* Read a 16-bit immediate constant */
389 static inline uint16_t read_im16(CPUM68KState *env, DisasContext *s)
390 {
391 uint16_t im;
392 im = translator_lduw(env, s->pc);
393 s->pc += 2;
394 return im;
395 }
396
397 /* Read an 8-bit immediate constant */
398 static inline uint8_t read_im8(CPUM68KState *env, DisasContext *s)
399 {
400 return read_im16(env, s);
401 }
402
403 /* Read a 32-bit immediate constant. */
404 static inline uint32_t read_im32(CPUM68KState *env, DisasContext *s)
405 {
406 uint32_t im;
407 im = read_im16(env, s) << 16;
408 im |= 0xffff & read_im16(env, s);
409 return im;
410 }
411
412 /* Read a 64-bit immediate constant. */
413 static inline uint64_t read_im64(CPUM68KState *env, DisasContext *s)
414 {
415 uint64_t im;
416 im = (uint64_t)read_im32(env, s) << 32;
417 im |= (uint64_t)read_im32(env, s);
418 return im;
419 }
420
421 /* Calculate and address index. */
422 static TCGv gen_addr_index(DisasContext *s, uint16_t ext, TCGv tmp)
423 {
424 TCGv add;
425 int scale;
426
427 add = (ext & 0x8000) ? AREG(ext, 12) : DREG(ext, 12);
428 if ((ext & 0x800) == 0) {
429 tcg_gen_ext16s_i32(tmp, add);
430 add = tmp;
431 }
432 scale = (ext >> 9) & 3;
433 if (scale != 0) {
434 tcg_gen_shli_i32(tmp, add, scale);
435 add = tmp;
436 }
437 return add;
438 }
439
440 /*
441 * Handle a base + index + displacement effective addresss.
442 * A NULL_QREG base means pc-relative.
443 */
444 static TCGv gen_lea_indexed(CPUM68KState *env, DisasContext *s, TCGv base)
445 {
446 uint32_t offset;
447 uint16_t ext;
448 TCGv add;
449 TCGv tmp;
450 uint32_t bd, od;
451
452 offset = s->pc;
453 ext = read_im16(env, s);
454
455 if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX))
456 return NULL_QREG;
457
458 if (m68k_feature(s->env, M68K_FEATURE_M68000) &&
459 !m68k_feature(s->env, M68K_FEATURE_SCALED_INDEX)) {
460 ext &= ~(3 << 9);
461 }
462
463 if (ext & 0x100) {
464 /* full extension word format */
465 if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL))
466 return NULL_QREG;
467
468 if ((ext & 0x30) > 0x10) {
469 /* base displacement */
470 if ((ext & 0x30) == 0x20) {
471 bd = (int16_t)read_im16(env, s);
472 } else {
473 bd = read_im32(env, s);
474 }
475 } else {
476 bd = 0;
477 }
478 tmp = mark_to_release(s, tcg_temp_new());
479 if ((ext & 0x44) == 0) {
480 /* pre-index */
481 add = gen_addr_index(s, ext, tmp);
482 } else {
483 add = NULL_QREG;
484 }
485 if ((ext & 0x80) == 0) {
486 /* base not suppressed */
487 if (IS_NULL_QREG(base)) {
488 base = mark_to_release(s, tcg_const_i32(offset + bd));
489 bd = 0;
490 }
491 if (!IS_NULL_QREG(add)) {
492 tcg_gen_add_i32(tmp, add, base);
493 add = tmp;
494 } else {
495 add = base;
496 }
497 }
498 if (!IS_NULL_QREG(add)) {
499 if (bd != 0) {
500 tcg_gen_addi_i32(tmp, add, bd);
501 add = tmp;
502 }
503 } else {
504 add = mark_to_release(s, tcg_const_i32(bd));
505 }
506 if ((ext & 3) != 0) {
507 /* memory indirect */
508 base = mark_to_release(s, gen_load(s, OS_LONG, add, 0, IS_USER(s)));
509 if ((ext & 0x44) == 4) {
510 add = gen_addr_index(s, ext, tmp);
511 tcg_gen_add_i32(tmp, add, base);
512 add = tmp;
513 } else {
514 add = base;
515 }
516 if ((ext & 3) > 1) {
517 /* outer displacement */
518 if ((ext & 3) == 2) {
519 od = (int16_t)read_im16(env, s);
520 } else {
521 od = read_im32(env, s);
522 }
523 } else {
524 od = 0;
525 }
526 if (od != 0) {
527 tcg_gen_addi_i32(tmp, add, od);
528 add = tmp;
529 }
530 }
531 } else {
532 /* brief extension word format */
533 tmp = mark_to_release(s, tcg_temp_new());
534 add = gen_addr_index(s, ext, tmp);
535 if (!IS_NULL_QREG(base)) {
536 tcg_gen_add_i32(tmp, add, base);
537 if ((int8_t)ext)
538 tcg_gen_addi_i32(tmp, tmp, (int8_t)ext);
539 } else {
540 tcg_gen_addi_i32(tmp, add, offset + (int8_t)ext);
541 }
542 add = tmp;
543 }
544 return add;
545 }
546
547 /* Sign or zero extend a value. */
548
549 static inline void gen_ext(TCGv res, TCGv val, int opsize, int sign)
550 {
551 switch (opsize) {
552 case OS_BYTE:
553 if (sign) {
554 tcg_gen_ext8s_i32(res, val);
555 } else {
556 tcg_gen_ext8u_i32(res, val);
557 }
558 break;
559 case OS_WORD:
560 if (sign) {
561 tcg_gen_ext16s_i32(res, val);
562 } else {
563 tcg_gen_ext16u_i32(res, val);
564 }
565 break;
566 case OS_LONG:
567 tcg_gen_mov_i32(res, val);
568 break;
569 default:
570 g_assert_not_reached();
571 }
572 }
573
574 /* Evaluate all the CC flags. */
575
576 static void gen_flush_flags(DisasContext *s)
577 {
578 TCGv t0, t1;
579
580 switch (s->cc_op) {
581 case CC_OP_FLAGS:
582 return;
583
584 case CC_OP_ADDB:
585 case CC_OP_ADDW:
586 case CC_OP_ADDL:
587 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
588 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
589 /* Compute signed overflow for addition. */
590 t0 = tcg_temp_new();
591 t1 = tcg_temp_new();
592 tcg_gen_sub_i32(t0, QREG_CC_N, QREG_CC_V);
593 gen_ext(t0, t0, s->cc_op - CC_OP_ADDB, 1);
594 tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V);
595 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0);
596 tcg_temp_free(t0);
597 tcg_gen_andc_i32(QREG_CC_V, t1, QREG_CC_V);
598 tcg_temp_free(t1);
599 break;
600
601 case CC_OP_SUBB:
602 case CC_OP_SUBW:
603 case CC_OP_SUBL:
604 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
605 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
606 /* Compute signed overflow for subtraction. */
607 t0 = tcg_temp_new();
608 t1 = tcg_temp_new();
609 tcg_gen_add_i32(t0, QREG_CC_N, QREG_CC_V);
610 gen_ext(t0, t0, s->cc_op - CC_OP_SUBB, 1);
611 tcg_gen_xor_i32(t1, QREG_CC_N, t0);
612 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0);
613 tcg_temp_free(t0);
614 tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t1);
615 tcg_temp_free(t1);
616 break;
617
618 case CC_OP_CMPB:
619 case CC_OP_CMPW:
620 case CC_OP_CMPL:
621 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_C, QREG_CC_N, QREG_CC_V);
622 tcg_gen_sub_i32(QREG_CC_Z, QREG_CC_N, QREG_CC_V);
623 gen_ext(QREG_CC_Z, QREG_CC_Z, s->cc_op - CC_OP_CMPB, 1);
624 /* Compute signed overflow for subtraction. */
625 t0 = tcg_temp_new();
626 tcg_gen_xor_i32(t0, QREG_CC_Z, QREG_CC_N);
627 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, QREG_CC_N);
628 tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t0);
629 tcg_temp_free(t0);
630 tcg_gen_mov_i32(QREG_CC_N, QREG_CC_Z);
631 break;
632
633 case CC_OP_LOGIC:
634 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
635 tcg_gen_movi_i32(QREG_CC_C, 0);
636 tcg_gen_movi_i32(QREG_CC_V, 0);
637 break;
638
639 case CC_OP_DYNAMIC:
640 gen_helper_flush_flags(cpu_env, QREG_CC_OP);
641 s->cc_op_synced = 1;
642 break;
643
644 default:
645 t0 = tcg_const_i32(s->cc_op);
646 gen_helper_flush_flags(cpu_env, t0);
647 tcg_temp_free(t0);
648 s->cc_op_synced = 1;
649 break;
650 }
651
652 /* Note that flush_flags also assigned to env->cc_op. */
653 s->cc_op = CC_OP_FLAGS;
654 }
655
656 static inline TCGv gen_extend(DisasContext *s, TCGv val, int opsize, int sign)
657 {
658 TCGv tmp;
659
660 if (opsize == OS_LONG) {
661 tmp = val;
662 } else {
663 tmp = mark_to_release(s, tcg_temp_new());
664 gen_ext(tmp, val, opsize, sign);
665 }
666
667 return tmp;
668 }
669
670 static void gen_logic_cc(DisasContext *s, TCGv val, int opsize)
671 {
672 gen_ext(QREG_CC_N, val, opsize, 1);
673 set_cc_op(s, CC_OP_LOGIC);
674 }
675
676 static void gen_update_cc_cmp(DisasContext *s, TCGv dest, TCGv src, int opsize)
677 {
678 tcg_gen_mov_i32(QREG_CC_N, dest);
679 tcg_gen_mov_i32(QREG_CC_V, src);
680 set_cc_op(s, CC_OP_CMPB + opsize);
681 }
682
683 static void gen_update_cc_add(TCGv dest, TCGv src, int opsize)
684 {
685 gen_ext(QREG_CC_N, dest, opsize, 1);
686 tcg_gen_mov_i32(QREG_CC_V, src);
687 }
688
689 static inline int opsize_bytes(int opsize)
690 {
691 switch (opsize) {
692 case OS_BYTE: return 1;
693 case OS_WORD: return 2;
694 case OS_LONG: return 4;
695 case OS_SINGLE: return 4;
696 case OS_DOUBLE: return 8;
697 case OS_EXTENDED: return 12;
698 case OS_PACKED: return 12;
699 default:
700 g_assert_not_reached();
701 }
702 }
703
704 static inline int insn_opsize(int insn)
705 {
706 switch ((insn >> 6) & 3) {
707 case 0: return OS_BYTE;
708 case 1: return OS_WORD;
709 case 2: return OS_LONG;
710 default:
711 g_assert_not_reached();
712 }
713 }
714
715 static inline int ext_opsize(int ext, int pos)
716 {
717 switch ((ext >> pos) & 7) {
718 case 0: return OS_LONG;
719 case 1: return OS_SINGLE;
720 case 2: return OS_EXTENDED;
721 case 3: return OS_PACKED;
722 case 4: return OS_WORD;
723 case 5: return OS_DOUBLE;
724 case 6: return OS_BYTE;
725 default:
726 g_assert_not_reached();
727 }
728 }
729
730 /*
731 * Assign value to a register. If the width is less than the register width
732 * only the low part of the register is set.
733 */
734 static void gen_partset_reg(int opsize, TCGv reg, TCGv val)
735 {
736 TCGv tmp;
737 switch (opsize) {
738 case OS_BYTE:
739 tcg_gen_andi_i32(reg, reg, 0xffffff00);
740 tmp = tcg_temp_new();
741 tcg_gen_ext8u_i32(tmp, val);
742 tcg_gen_or_i32(reg, reg, tmp);
743 tcg_temp_free(tmp);
744 break;
745 case OS_WORD:
746 tcg_gen_andi_i32(reg, reg, 0xffff0000);
747 tmp = tcg_temp_new();
748 tcg_gen_ext16u_i32(tmp, val);
749 tcg_gen_or_i32(reg, reg, tmp);
750 tcg_temp_free(tmp);
751 break;
752 case OS_LONG:
753 case OS_SINGLE:
754 tcg_gen_mov_i32(reg, val);
755 break;
756 default:
757 g_assert_not_reached();
758 }
759 }
760
761 /*
762 * Generate code for an "effective address". Does not adjust the base
763 * register for autoincrement addressing modes.
764 */
765 static TCGv gen_lea_mode(CPUM68KState *env, DisasContext *s,
766 int mode, int reg0, int opsize)
767 {
768 TCGv reg;
769 TCGv tmp;
770 uint16_t ext;
771 uint32_t offset;
772
773 switch (mode) {
774 case 0: /* Data register direct. */
775 case 1: /* Address register direct. */
776 return NULL_QREG;
777 case 3: /* Indirect postincrement. */
778 if (opsize == OS_UNSIZED) {
779 return NULL_QREG;
780 }
781 /* fallthru */
782 case 2: /* Indirect register */
783 return get_areg(s, reg0);
784 case 4: /* Indirect predecrememnt. */
785 if (opsize == OS_UNSIZED) {
786 return NULL_QREG;
787 }
788 reg = get_areg(s, reg0);
789 tmp = mark_to_release(s, tcg_temp_new());
790 if (reg0 == 7 && opsize == OS_BYTE &&
791 m68k_feature(s->env, M68K_FEATURE_M68000)) {
792 tcg_gen_subi_i32(tmp, reg, 2);
793 } else {
794 tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize));
795 }
796 return tmp;
797 case 5: /* Indirect displacement. */
798 reg = get_areg(s, reg0);
799 tmp = mark_to_release(s, tcg_temp_new());
800 ext = read_im16(env, s);
801 tcg_gen_addi_i32(tmp, reg, (int16_t)ext);
802 return tmp;
803 case 6: /* Indirect index + displacement. */
804 reg = get_areg(s, reg0);
805 return gen_lea_indexed(env, s, reg);
806 case 7: /* Other */
807 switch (reg0) {
808 case 0: /* Absolute short. */
809 offset = (int16_t)read_im16(env, s);
810 return mark_to_release(s, tcg_const_i32(offset));
811 case 1: /* Absolute long. */
812 offset = read_im32(env, s);
813 return mark_to_release(s, tcg_const_i32(offset));
814 case 2: /* pc displacement */
815 offset = s->pc;
816 offset += (int16_t)read_im16(env, s);
817 return mark_to_release(s, tcg_const_i32(offset));
818 case 3: /* pc index+displacement. */
819 return gen_lea_indexed(env, s, NULL_QREG);
820 case 4: /* Immediate. */
821 default:
822 return NULL_QREG;
823 }
824 }
825 /* Should never happen. */
826 return NULL_QREG;
827 }
828
829 static TCGv gen_lea(CPUM68KState *env, DisasContext *s, uint16_t insn,
830 int opsize)
831 {
832 int mode = extract32(insn, 3, 3);
833 int reg0 = REG(insn, 0);
834 return gen_lea_mode(env, s, mode, reg0, opsize);
835 }
836
837 /*
838 * Generate code to load/store a value from/into an EA. If WHAT > 0 this is
839 * a write otherwise it is a read (0 == sign extend, -1 == zero extend).
840 * ADDRP is non-null for readwrite operands.
841 */
842 static TCGv gen_ea_mode(CPUM68KState *env, DisasContext *s, int mode, int reg0,
843 int opsize, TCGv val, TCGv *addrp, ea_what what,
844 int index)
845 {
846 TCGv reg, tmp, result;
847 int32_t offset;
848
849 switch (mode) {
850 case 0: /* Data register direct. */
851 reg = cpu_dregs[reg0];
852 if (what == EA_STORE) {
853 gen_partset_reg(opsize, reg, val);
854 return store_dummy;
855 } else {
856 return gen_extend(s, reg, opsize, what == EA_LOADS);
857 }
858 case 1: /* Address register direct. */
859 reg = get_areg(s, reg0);
860 if (what == EA_STORE) {
861 tcg_gen_mov_i32(reg, val);
862 return store_dummy;
863 } else {
864 return gen_extend(s, reg, opsize, what == EA_LOADS);
865 }
866 case 2: /* Indirect register */
867 reg = get_areg(s, reg0);
868 return gen_ldst(s, opsize, reg, val, what, index);
869 case 3: /* Indirect postincrement. */
870 reg = get_areg(s, reg0);
871 result = gen_ldst(s, opsize, reg, val, what, index);
872 if (what == EA_STORE || !addrp) {
873 TCGv tmp = tcg_temp_new();
874 if (reg0 == 7 && opsize == OS_BYTE &&
875 m68k_feature(s->env, M68K_FEATURE_M68000)) {
876 tcg_gen_addi_i32(tmp, reg, 2);
877 } else {
878 tcg_gen_addi_i32(tmp, reg, opsize_bytes(opsize));
879 }
880 delay_set_areg(s, reg0, tmp, true);
881 }
882 return result;
883 case 4: /* Indirect predecrememnt. */
884 if (addrp && what == EA_STORE) {
885 tmp = *addrp;
886 } else {
887 tmp = gen_lea_mode(env, s, mode, reg0, opsize);
888 if (IS_NULL_QREG(tmp)) {
889 return tmp;
890 }
891 if (addrp) {
892 *addrp = tmp;
893 }
894 }
895 result = gen_ldst(s, opsize, tmp, val, what, index);
896 if (what == EA_STORE || !addrp) {
897 delay_set_areg(s, reg0, tmp, false);
898 }
899 return result;
900 case 5: /* Indirect displacement. */
901 case 6: /* Indirect index + displacement. */
902 do_indirect:
903 if (addrp && what == EA_STORE) {
904 tmp = *addrp;
905 } else {
906 tmp = gen_lea_mode(env, s, mode, reg0, opsize);
907 if (IS_NULL_QREG(tmp)) {
908 return tmp;
909 }
910 if (addrp) {
911 *addrp = tmp;
912 }
913 }
914 return gen_ldst(s, opsize, tmp, val, what, index);
915 case 7: /* Other */
916 switch (reg0) {
917 case 0: /* Absolute short. */
918 case 1: /* Absolute long. */
919 case 2: /* pc displacement */
920 case 3: /* pc index+displacement. */
921 goto do_indirect;
922 case 4: /* Immediate. */
923 /* Sign extend values for consistency. */
924 switch (opsize) {
925 case OS_BYTE:
926 if (what == EA_LOADS) {
927 offset = (int8_t)read_im8(env, s);
928 } else {
929 offset = read_im8(env, s);
930 }
931 break;
932 case OS_WORD:
933 if (what == EA_LOADS) {
934 offset = (int16_t)read_im16(env, s);
935 } else {
936 offset = read_im16(env, s);
937 }
938 break;
939 case OS_LONG:
940 offset = read_im32(env, s);
941 break;
942 default:
943 g_assert_not_reached();
944 }
945 return mark_to_release(s, tcg_const_i32(offset));
946 default:
947 return NULL_QREG;
948 }
949 }
950 /* Should never happen. */
951 return NULL_QREG;
952 }
953
954 static TCGv gen_ea(CPUM68KState *env, DisasContext *s, uint16_t insn,
955 int opsize, TCGv val, TCGv *addrp, ea_what what, int index)
956 {
957 int mode = extract32(insn, 3, 3);
958 int reg0 = REG(insn, 0);
959 return gen_ea_mode(env, s, mode, reg0, opsize, val, addrp, what, index);
960 }
961
962 static TCGv_ptr gen_fp_ptr(int freg)
963 {
964 TCGv_ptr fp = tcg_temp_new_ptr();
965 tcg_gen_addi_ptr(fp, cpu_env, offsetof(CPUM68KState, fregs[freg]));
966 return fp;
967 }
968
969 static TCGv_ptr gen_fp_result_ptr(void)
970 {
971 TCGv_ptr fp = tcg_temp_new_ptr();
972 tcg_gen_addi_ptr(fp, cpu_env, offsetof(CPUM68KState, fp_result));
973 return fp;
974 }
975
976 static void gen_fp_move(TCGv_ptr dest, TCGv_ptr src)
977 {
978 TCGv t32;
979 TCGv_i64 t64;
980
981 t32 = tcg_temp_new();
982 tcg_gen_ld16u_i32(t32, src, offsetof(FPReg, l.upper));
983 tcg_gen_st16_i32(t32, dest, offsetof(FPReg, l.upper));
984 tcg_temp_free(t32);
985
986 t64 = tcg_temp_new_i64();
987 tcg_gen_ld_i64(t64, src, offsetof(FPReg, l.lower));
988 tcg_gen_st_i64(t64, dest, offsetof(FPReg, l.lower));
989 tcg_temp_free_i64(t64);
990 }
991
992 static void gen_load_fp(DisasContext *s, int opsize, TCGv addr, TCGv_ptr fp,
993 int index)
994 {
995 TCGv tmp;
996 TCGv_i64 t64;
997
998 t64 = tcg_temp_new_i64();
999 tmp = tcg_temp_new();
1000 switch (opsize) {
1001 case OS_BYTE:
1002 tcg_gen_qemu_ld8s(tmp, addr, index);
1003 gen_helper_exts32(cpu_env, fp, tmp);
1004 break;
1005 case OS_WORD:
1006 tcg_gen_qemu_ld16s(tmp, addr, index);
1007 gen_helper_exts32(cpu_env, fp, tmp);
1008 break;
1009 case OS_LONG:
1010 tcg_gen_qemu_ld32u(tmp, addr, index);
1011 gen_helper_exts32(cpu_env, fp, tmp);
1012 break;
1013 case OS_SINGLE:
1014 tcg_gen_qemu_ld32u(tmp, addr, index);
1015 gen_helper_extf32(cpu_env, fp, tmp);
1016 break;
1017 case OS_DOUBLE:
1018 tcg_gen_qemu_ld64(t64, addr, index);
1019 gen_helper_extf64(cpu_env, fp, t64);
1020 break;
1021 case OS_EXTENDED:
1022 if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) {
1023 gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP);
1024 break;
1025 }
1026 tcg_gen_qemu_ld32u(tmp, addr, index);
1027 tcg_gen_shri_i32(tmp, tmp, 16);
1028 tcg_gen_st16_i32(tmp, fp, offsetof(FPReg, l.upper));
1029 tcg_gen_addi_i32(tmp, addr, 4);
1030 tcg_gen_qemu_ld64(t64, tmp, index);
1031 tcg_gen_st_i64(t64, fp, offsetof(FPReg, l.lower));
1032 break;
1033 case OS_PACKED:
1034 /*
1035 * unimplemented data type on 68040/ColdFire
1036 * FIXME if needed for another FPU
1037 */
1038 gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP);
1039 break;
1040 default:
1041 g_assert_not_reached();
1042 }
1043 tcg_temp_free(tmp);
1044 tcg_temp_free_i64(t64);
1045 }
1046
1047 static void gen_store_fp(DisasContext *s, int opsize, TCGv addr, TCGv_ptr fp,
1048 int index)
1049 {
1050 TCGv tmp;
1051 TCGv_i64 t64;
1052
1053 t64 = tcg_temp_new_i64();
1054 tmp = tcg_temp_new();
1055 switch (opsize) {
1056 case OS_BYTE:
1057 gen_helper_reds32(tmp, cpu_env, fp);
1058 tcg_gen_qemu_st8(tmp, addr, index);
1059 break;
1060 case OS_WORD:
1061 gen_helper_reds32(tmp, cpu_env, fp);
1062 tcg_gen_qemu_st16(tmp, addr, index);
1063 break;
1064 case OS_LONG:
1065 gen_helper_reds32(tmp, cpu_env, fp);
1066 tcg_gen_qemu_st32(tmp, addr, index);
1067 break;
1068 case OS_SINGLE:
1069 gen_helper_redf32(tmp, cpu_env, fp);
1070 tcg_gen_qemu_st32(tmp, addr, index);
1071 break;
1072 case OS_DOUBLE:
1073 gen_helper_redf64(t64, cpu_env, fp);
1074 tcg_gen_qemu_st64(t64, addr, index);
1075 break;
1076 case OS_EXTENDED:
1077 if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) {
1078 gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP);
1079 break;
1080 }
1081 tcg_gen_ld16u_i32(tmp, fp, offsetof(FPReg, l.upper));
1082 tcg_gen_shli_i32(tmp, tmp, 16);
1083 tcg_gen_qemu_st32(tmp, addr, index);
1084 tcg_gen_addi_i32(tmp, addr, 4);
1085 tcg_gen_ld_i64(t64, fp, offsetof(FPReg, l.lower));
1086 tcg_gen_qemu_st64(t64, tmp, index);
1087 break;
1088 case OS_PACKED:
1089 /*
1090 * unimplemented data type on 68040/ColdFire
1091 * FIXME if needed for another FPU
1092 */
1093 gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP);
1094 break;
1095 default:
1096 g_assert_not_reached();
1097 }
1098 tcg_temp_free(tmp);
1099 tcg_temp_free_i64(t64);
1100 }
1101
1102 static void gen_ldst_fp(DisasContext *s, int opsize, TCGv addr,
1103 TCGv_ptr fp, ea_what what, int index)
1104 {
1105 if (what == EA_STORE) {
1106 gen_store_fp(s, opsize, addr, fp, index);
1107 } else {
1108 gen_load_fp(s, opsize, addr, fp, index);
1109 }
1110 }
1111
1112 static int gen_ea_mode_fp(CPUM68KState *env, DisasContext *s, int mode,
1113 int reg0, int opsize, TCGv_ptr fp, ea_what what,
1114 int index)
1115 {
1116 TCGv reg, addr, tmp;
1117 TCGv_i64 t64;
1118
1119 switch (mode) {
1120 case 0: /* Data register direct. */
1121 reg = cpu_dregs[reg0];
1122 if (what == EA_STORE) {
1123 switch (opsize) {
1124 case OS_BYTE:
1125 case OS_WORD:
1126 case OS_LONG:
1127 gen_helper_reds32(reg, cpu_env, fp);
1128 break;
1129 case OS_SINGLE:
1130 gen_helper_redf32(reg, cpu_env, fp);
1131 break;
1132 default:
1133 g_assert_not_reached();
1134 }
1135 } else {
1136 tmp = tcg_temp_new();
1137 switch (opsize) {
1138 case OS_BYTE:
1139 tcg_gen_ext8s_i32(tmp, reg);
1140 gen_helper_exts32(cpu_env, fp, tmp);
1141 break;
1142 case OS_WORD:
1143 tcg_gen_ext16s_i32(tmp, reg);
1144 gen_helper_exts32(cpu_env, fp, tmp);
1145 break;
1146 case OS_LONG:
1147 gen_helper_exts32(cpu_env, fp, reg);
1148 break;
1149 case OS_SINGLE:
1150 gen_helper_extf32(cpu_env, fp, reg);
1151 break;
1152 default:
1153 g_assert_not_reached();
1154 }
1155 tcg_temp_free(tmp);
1156 }
1157 return 0;
1158 case 1: /* Address register direct. */
1159 return -1;
1160 case 2: /* Indirect register */
1161 addr = get_areg(s, reg0);
1162 gen_ldst_fp(s, opsize, addr, fp, what, index);
1163 return 0;
1164 case 3: /* Indirect postincrement. */
1165 addr = cpu_aregs[reg0];
1166 gen_ldst_fp(s, opsize, addr, fp, what, index);
1167 tcg_gen_addi_i32(addr, addr, opsize_bytes(opsize));
1168 return 0;
1169 case 4: /* Indirect predecrememnt. */
1170 addr = gen_lea_mode(env, s, mode, reg0, opsize);
1171 if (IS_NULL_QREG(addr)) {
1172 return -1;
1173 }
1174 gen_ldst_fp(s, opsize, addr, fp, what, index);
1175 tcg_gen_mov_i32(cpu_aregs[reg0], addr);
1176 return 0;
1177 case 5: /* Indirect displacement. */
1178 case 6: /* Indirect index + displacement. */
1179 do_indirect:
1180 addr = gen_lea_mode(env, s, mode, reg0, opsize);
1181 if (IS_NULL_QREG(addr)) {
1182 return -1;
1183 }
1184 gen_ldst_fp(s, opsize, addr, fp, what, index);
1185 return 0;
1186 case 7: /* Other */
1187 switch (reg0) {
1188 case 0: /* Absolute short. */
1189 case 1: /* Absolute long. */
1190 case 2: /* pc displacement */
1191 case 3: /* pc index+displacement. */
1192 goto do_indirect;
1193 case 4: /* Immediate. */
1194 if (what == EA_STORE) {
1195 return -1;
1196 }
1197 switch (opsize) {
1198 case OS_BYTE:
1199 tmp = tcg_const_i32((int8_t)read_im8(env, s));
1200 gen_helper_exts32(cpu_env, fp, tmp);
1201 tcg_temp_free(tmp);
1202 break;
1203 case OS_WORD:
1204 tmp = tcg_const_i32((int16_t)read_im16(env, s));
1205 gen_helper_exts32(cpu_env, fp, tmp);
1206 tcg_temp_free(tmp);
1207 break;
1208 case OS_LONG:
1209 tmp = tcg_const_i32(read_im32(env, s));
1210 gen_helper_exts32(cpu_env, fp, tmp);
1211 tcg_temp_free(tmp);
1212 break;
1213 case OS_SINGLE:
1214 tmp = tcg_const_i32(read_im32(env, s));
1215 gen_helper_extf32(cpu_env, fp, tmp);
1216 tcg_temp_free(tmp);
1217 break;
1218 case OS_DOUBLE:
1219 t64 = tcg_const_i64(read_im64(env, s));
1220 gen_helper_extf64(cpu_env, fp, t64);
1221 tcg_temp_free_i64(t64);
1222 break;
1223 case OS_EXTENDED:
1224 if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) {
1225 gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP);
1226 break;
1227 }
1228 tmp = tcg_const_i32(read_im32(env, s) >> 16);
1229 tcg_gen_st16_i32(tmp, fp, offsetof(FPReg, l.upper));
1230 tcg_temp_free(tmp);
1231 t64 = tcg_const_i64(read_im64(env, s));
1232 tcg_gen_st_i64(t64, fp, offsetof(FPReg, l.lower));
1233 tcg_temp_free_i64(t64);
1234 break;
1235 case OS_PACKED:
1236 /*
1237 * unimplemented data type on 68040/ColdFire
1238 * FIXME if needed for another FPU
1239 */
1240 gen_exception(s, s->base.pc_next, EXCP_FP_UNIMP);
1241 break;
1242 default:
1243 g_assert_not_reached();
1244 }
1245 return 0;
1246 default:
1247 return -1;
1248 }
1249 }
1250 return -1;
1251 }
1252
1253 static int gen_ea_fp(CPUM68KState *env, DisasContext *s, uint16_t insn,
1254 int opsize, TCGv_ptr fp, ea_what what, int index)
1255 {
1256 int mode = extract32(insn, 3, 3);
1257 int reg0 = REG(insn, 0);
1258 return gen_ea_mode_fp(env, s, mode, reg0, opsize, fp, what, index);
1259 }
1260
1261 typedef struct {
1262 TCGCond tcond;
1263 bool g1;
1264 bool g2;
1265 TCGv v1;
1266 TCGv v2;
1267 } DisasCompare;
1268
1269 static void gen_cc_cond(DisasCompare *c, DisasContext *s, int cond)
1270 {
1271 TCGv tmp, tmp2;
1272 TCGCond tcond;
1273 CCOp op = s->cc_op;
1274
1275 /* The CC_OP_CMP form can handle most normal comparisons directly. */
1276 if (op == CC_OP_CMPB || op == CC_OP_CMPW || op == CC_OP_CMPL) {
1277 c->g1 = c->g2 = 1;
1278 c->v1 = QREG_CC_N;
1279 c->v2 = QREG_CC_V;
1280 switch (cond) {
1281 case 2: /* HI */
1282 case 3: /* LS */
1283 tcond = TCG_COND_LEU;
1284 goto done;
1285 case 4: /* CC */
1286 case 5: /* CS */
1287 tcond = TCG_COND_LTU;
1288 goto done;
1289 case 6: /* NE */
1290 case 7: /* EQ */
1291 tcond = TCG_COND_EQ;
1292 goto done;
1293 case 10: /* PL */
1294 case 11: /* MI */
1295 c->g1 = c->g2 = 0;
1296 c->v2 = tcg_const_i32(0);
1297 c->v1 = tmp = tcg_temp_new();
1298 tcg_gen_sub_i32(tmp, QREG_CC_N, QREG_CC_V);
1299 gen_ext(tmp, tmp, op - CC_OP_CMPB, 1);
1300 /* fallthru */
1301 case 12: /* GE */
1302 case 13: /* LT */
1303 tcond = TCG_COND_LT;
1304 goto done;
1305 case 14: /* GT */
1306 case 15: /* LE */
1307 tcond = TCG_COND_LE;
1308 goto done;
1309 }
1310 }
1311
1312 c->g1 = 1;
1313 c->g2 = 0;
1314 c->v2 = tcg_const_i32(0);
1315
1316 switch (cond) {
1317 case 0: /* T */
1318 case 1: /* F */
1319 c->v1 = c->v2;
1320 tcond = TCG_COND_NEVER;
1321 goto done;
1322 case 14: /* GT (!(Z || (N ^ V))) */
1323 case 15: /* LE (Z || (N ^ V)) */
1324 /*
1325 * Logic operations clear V, which simplifies LE to (Z || N),
1326 * and since Z and N are co-located, this becomes a normal
1327 * comparison vs N.
1328 */
1329 if (op == CC_OP_LOGIC) {
1330 c->v1 = QREG_CC_N;
1331 tcond = TCG_COND_LE;
1332 goto done;
1333 }
1334 break;
1335 case 12: /* GE (!(N ^ V)) */
1336 case 13: /* LT (N ^ V) */
1337 /* Logic operations clear V, which simplifies this to N. */
1338 if (op != CC_OP_LOGIC) {
1339 break;
1340 }
1341 /* fallthru */
1342 case 10: /* PL (!N) */
1343 case 11: /* MI (N) */
1344 /* Several cases represent N normally. */
1345 if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
1346 op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL ||
1347 op == CC_OP_LOGIC) {
1348 c->v1 = QREG_CC_N;
1349 tcond = TCG_COND_LT;
1350 goto done;
1351 }
1352 break;
1353 case 6: /* NE (!Z) */
1354 case 7: /* EQ (Z) */
1355 /* Some cases fold Z into N. */
1356 if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
1357 op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL ||
1358 op == CC_OP_LOGIC) {
1359 tcond = TCG_COND_EQ;
1360 c->v1 = QREG_CC_N;
1361 goto done;
1362 }
1363 break;
1364 case 4: /* CC (!C) */
1365 case 5: /* CS (C) */
1366 /* Some cases fold C into X. */
1367 if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
1368 op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL) {
1369 tcond = TCG_COND_NE;
1370 c->v1 = QREG_CC_X;
1371 goto done;
1372 }
1373 /* fallthru */
1374 case 8: /* VC (!V) */
1375 case 9: /* VS (V) */
1376 /* Logic operations clear V and C. */
1377 if (op == CC_OP_LOGIC) {
1378 tcond = TCG_COND_NEVER;
1379 c->v1 = c->v2;
1380 goto done;
1381 }
1382 break;
1383 }
1384
1385 /* Otherwise, flush flag state to CC_OP_FLAGS. */
1386 gen_flush_flags(s);
1387
1388 switch (cond) {
1389 case 0: /* T */
1390 case 1: /* F */
1391 default:
1392 /* Invalid, or handled above. */
1393 abort();
1394 case 2: /* HI (!C && !Z) -> !(C || Z)*/
1395 case 3: /* LS (C || Z) */
1396 c->v1 = tmp = tcg_temp_new();
1397 c->g1 = 0;
1398 tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2);
1399 tcg_gen_or_i32(tmp, tmp, QREG_CC_C);
1400 tcond = TCG_COND_NE;
1401 break;
1402 case 4: /* CC (!C) */
1403 case 5: /* CS (C) */
1404 c->v1 = QREG_CC_C;
1405 tcond = TCG_COND_NE;
1406 break;
1407 case 6: /* NE (!Z) */
1408 case 7: /* EQ (Z) */
1409 c->v1 = QREG_CC_Z;
1410 tcond = TCG_COND_EQ;
1411 break;
1412 case 8: /* VC (!V) */
1413 case 9: /* VS (V) */
1414 c->v1 = QREG_CC_V;
1415 tcond = TCG_COND_LT;
1416 break;
1417 case 10: /* PL (!N) */
1418 case 11: /* MI (N) */
1419 c->v1 = QREG_CC_N;
1420 tcond = TCG_COND_LT;
1421 break;
1422 case 12: /* GE (!(N ^ V)) */
1423 case 13: /* LT (N ^ V) */
1424 c->v1 = tmp = tcg_temp_new();
1425 c->g1 = 0;
1426 tcg_gen_xor_i32(tmp, QREG_CC_N, QREG_CC_V);
1427 tcond = TCG_COND_LT;
1428 break;
1429 case 14: /* GT (!(Z || (N ^ V))) */
1430 case 15: /* LE (Z || (N ^ V)) */
1431 c->v1 = tmp = tcg_temp_new();
1432 c->g1 = 0;
1433 tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2);
1434 tcg_gen_neg_i32(tmp, tmp);
1435 tmp2 = tcg_temp_new();
1436 tcg_gen_xor_i32(tmp2, QREG_CC_N, QREG_CC_V);
1437 tcg_gen_or_i32(tmp, tmp, tmp2);
1438 tcg_temp_free(tmp2);
1439 tcond = TCG_COND_LT;
1440 break;
1441 }
1442
1443 done:
1444 if ((cond & 1) == 0) {
1445 tcond = tcg_invert_cond(tcond);
1446 }
1447 c->tcond = tcond;
1448 }
1449
1450 static void free_cond(DisasCompare *c)
1451 {
1452 if (!c->g1) {
1453 tcg_temp_free(c->v1);
1454 }
1455 if (!c->g2) {
1456 tcg_temp_free(c->v2);
1457 }
1458 }
1459
1460 static void gen_jmpcc(DisasContext *s, int cond, TCGLabel *l1)
1461 {
1462 DisasCompare c;
1463
1464 gen_cc_cond(&c, s, cond);
1465 update_cc_op(s);
1466 tcg_gen_brcond_i32(c.tcond, c.v1, c.v2, l1);
1467 free_cond(&c);
1468 }
1469
1470 /* Force a TB lookup after an instruction that changes the CPU state. */
1471 static void gen_exit_tb(DisasContext *s)
1472 {
1473 update_cc_op(s);
1474 tcg_gen_movi_i32(QREG_PC, s->pc);
1475 s->base.is_jmp = DISAS_EXIT;
1476 }
1477
1478 #define SRC_EA(env, result, opsize, op_sign, addrp) do { \
1479 result = gen_ea(env, s, insn, opsize, NULL_QREG, addrp, \
1480 op_sign ? EA_LOADS : EA_LOADU, IS_USER(s)); \
1481 if (IS_NULL_QREG(result)) { \
1482 gen_addr_fault(s); \
1483 return; \
1484 } \
1485 } while (0)
1486
1487 #define DEST_EA(env, insn, opsize, val, addrp) do { \
1488 TCGv ea_result = gen_ea(env, s, insn, opsize, val, addrp, \
1489 EA_STORE, IS_USER(s)); \
1490 if (IS_NULL_QREG(ea_result)) { \
1491 gen_addr_fault(s); \
1492 return; \
1493 } \
1494 } while (0)
1495
1496 static inline bool use_goto_tb(DisasContext *s, uint32_t dest)
1497 {
1498 #ifndef CONFIG_USER_ONLY
1499 return (s->base.pc_first & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)
1500 || (s->base.pc_next & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK);
1501 #else
1502 return true;
1503 #endif
1504 }
1505
1506 /* Generate a jump to an immediate address. */
1507 static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
1508 {
1509 if (unlikely(s->base.singlestep_enabled)) {
1510 gen_exception(s, dest, EXCP_DEBUG);
1511 } else if (use_goto_tb(s, dest)) {
1512 tcg_gen_goto_tb(n);
1513 tcg_gen_movi_i32(QREG_PC, dest);
1514 tcg_gen_exit_tb(s->base.tb, n);
1515 } else {
1516 gen_jmp_im(s, dest);
1517 tcg_gen_exit_tb(NULL, 0);
1518 }
1519 s->base.is_jmp = DISAS_NORETURN;
1520 }
1521
1522 DISAS_INSN(scc)
1523 {
1524 DisasCompare c;
1525 int cond;
1526 TCGv tmp;
1527
1528 cond = (insn >> 8) & 0xf;
1529 gen_cc_cond(&c, s, cond);
1530
1531 tmp = tcg_temp_new();
1532 tcg_gen_setcond_i32(c.tcond, tmp, c.v1, c.v2);
1533 free_cond(&c);
1534
1535 tcg_gen_neg_i32(tmp, tmp);
1536 DEST_EA(env, insn, OS_BYTE, tmp, NULL);
1537 tcg_temp_free(tmp);
1538 }
1539
1540 DISAS_INSN(dbcc)
1541 {
1542 TCGLabel *l1;
1543 TCGv reg;
1544 TCGv tmp;
1545 int16_t offset;
1546 uint32_t base;
1547
1548 reg = DREG(insn, 0);
1549 base = s->pc;
1550 offset = (int16_t)read_im16(env, s);
1551 l1 = gen_new_label();
1552 gen_jmpcc(s, (insn >> 8) & 0xf, l1);
1553
1554 tmp = tcg_temp_new();
1555 tcg_gen_ext16s_i32(tmp, reg);
1556 tcg_gen_addi_i32(tmp, tmp, -1);
1557 gen_partset_reg(OS_WORD, reg, tmp);
1558 tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, -1, l1);
1559 gen_jmp_tb(s, 1, base + offset);
1560 gen_set_label(l1);
1561 gen_jmp_tb(s, 0, s->pc);
1562 }
1563
1564 DISAS_INSN(undef_mac)
1565 {
1566 gen_exception(s, s->base.pc_next, EXCP_LINEA);
1567 }
1568
1569 DISAS_INSN(undef_fpu)
1570 {
1571 gen_exception(s, s->base.pc_next, EXCP_LINEF);
1572 }
1573
1574 DISAS_INSN(undef)
1575 {
1576 /*
1577 * ??? This is both instructions that are as yet unimplemented
1578 * for the 680x0 series, as well as those that are implemented
1579 * but actually illegal for CPU32 or pre-68020.
1580 */
1581 qemu_log_mask(LOG_UNIMP, "Illegal instruction: %04x @ %08x\n",
1582 insn, s->base.pc_next);
1583 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
1584 }
1585
1586 DISAS_INSN(mulw)
1587 {
1588 TCGv reg;
1589 TCGv tmp;
1590 TCGv src;
1591 int sign;
1592
1593 sign = (insn & 0x100) != 0;
1594 reg = DREG(insn, 9);
1595 tmp = tcg_temp_new();
1596 if (sign)
1597 tcg_gen_ext16s_i32(tmp, reg);
1598 else
1599 tcg_gen_ext16u_i32(tmp, reg);
1600 SRC_EA(env, src, OS_WORD, sign, NULL);
1601 tcg_gen_mul_i32(tmp, tmp, src);
1602 tcg_gen_mov_i32(reg, tmp);
1603 gen_logic_cc(s, tmp, OS_LONG);
1604 tcg_temp_free(tmp);
1605 }
1606
1607 DISAS_INSN(divw)
1608 {
1609 int sign;
1610 TCGv src;
1611 TCGv destr;
1612
1613 /* divX.w <EA>,Dn 32/16 -> 16r:16q */
1614
1615 sign = (insn & 0x100) != 0;
1616
1617 /* dest.l / src.w */
1618
1619 SRC_EA(env, src, OS_WORD, sign, NULL);
1620 destr = tcg_const_i32(REG(insn, 9));
1621 if (sign) {
1622 gen_helper_divsw(cpu_env, destr, src);
1623 } else {
1624 gen_helper_divuw(cpu_env, destr, src);
1625 }
1626 tcg_temp_free(destr);
1627
1628 set_cc_op(s, CC_OP_FLAGS);
1629 }
1630
1631 DISAS_INSN(divl)
1632 {
1633 TCGv num, reg, den;
1634 int sign;
1635 uint16_t ext;
1636
1637 ext = read_im16(env, s);
1638
1639 sign = (ext & 0x0800) != 0;
1640
1641 if (ext & 0x400) {
1642 if (!m68k_feature(s->env, M68K_FEATURE_QUAD_MULDIV)) {
1643 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
1644 return;
1645 }
1646
1647 /* divX.l <EA>, Dr:Dq 64/32 -> 32r:32q */
1648
1649 SRC_EA(env, den, OS_LONG, 0, NULL);
1650 num = tcg_const_i32(REG(ext, 12));
1651 reg = tcg_const_i32(REG(ext, 0));
1652 if (sign) {
1653 gen_helper_divsll(cpu_env, num, reg, den);
1654 } else {
1655 gen_helper_divull(cpu_env, num, reg, den);
1656 }
1657 tcg_temp_free(reg);
1658 tcg_temp_free(num);
1659 set_cc_op(s, CC_OP_FLAGS);
1660 return;
1661 }
1662
1663 /* divX.l <EA>, Dq 32/32 -> 32q */
1664 /* divXl.l <EA>, Dr:Dq 32/32 -> 32r:32q */
1665
1666 SRC_EA(env, den, OS_LONG, 0, NULL);
1667 num = tcg_const_i32(REG(ext, 12));
1668 reg = tcg_const_i32(REG(ext, 0));
1669 if (sign) {
1670 gen_helper_divsl(cpu_env, num, reg, den);
1671 } else {
1672 gen_helper_divul(cpu_env, num, reg, den);
1673 }
1674 tcg_temp_free(reg);
1675 tcg_temp_free(num);
1676
1677 set_cc_op(s, CC_OP_FLAGS);
1678 }
1679
1680 static void bcd_add(TCGv dest, TCGv src)
1681 {
1682 TCGv t0, t1;
1683
1684 /*
1685 * dest10 = dest10 + src10 + X
1686 *
1687 * t1 = src
1688 * t2 = t1 + 0x066
1689 * t3 = t2 + dest + X
1690 * t4 = t2 ^ dest
1691 * t5 = t3 ^ t4
1692 * t6 = ~t5 & 0x110
1693 * t7 = (t6 >> 2) | (t6 >> 3)
1694 * return t3 - t7
1695 */
1696
1697 /*
1698 * t1 = (src + 0x066) + dest + X
1699 * = result with some possible exceding 0x6
1700 */
1701
1702 t0 = tcg_const_i32(0x066);
1703 tcg_gen_add_i32(t0, t0, src);
1704
1705 t1 = tcg_temp_new();
1706 tcg_gen_add_i32(t1, t0, dest);
1707 tcg_gen_add_i32(t1, t1, QREG_CC_X);
1708
1709 /* we will remove exceding 0x6 where there is no carry */
1710
1711 /*
1712 * t0 = (src + 0x0066) ^ dest
1713 * = t1 without carries
1714 */
1715
1716 tcg_gen_xor_i32(t0, t0, dest);
1717
1718 /*
1719 * extract the carries
1720 * t0 = t0 ^ t1
1721 * = only the carries
1722 */
1723
1724 tcg_gen_xor_i32(t0, t0, t1);
1725
1726 /*
1727 * generate 0x1 where there is no carry
1728 * and for each 0x10, generate a 0x6
1729 */
1730
1731 tcg_gen_shri_i32(t0, t0, 3);
1732 tcg_gen_not_i32(t0, t0);
1733 tcg_gen_andi_i32(t0, t0, 0x22);
1734 tcg_gen_add_i32(dest, t0, t0);
1735 tcg_gen_add_i32(dest, dest, t0);
1736 tcg_temp_free(t0);
1737
1738 /*
1739 * remove the exceding 0x6
1740 * for digits that have not generated a carry
1741 */
1742
1743 tcg_gen_sub_i32(dest, t1, dest);
1744 tcg_temp_free(t1);
1745 }
1746
1747 static void bcd_sub(TCGv dest, TCGv src)
1748 {
1749 TCGv t0, t1, t2;
1750
1751 /*
1752 * dest10 = dest10 - src10 - X
1753 * = bcd_add(dest + 1 - X, 0x199 - src)
1754 */
1755
1756 /* t0 = 0x066 + (0x199 - src) */
1757
1758 t0 = tcg_temp_new();
1759 tcg_gen_subfi_i32(t0, 0x1ff, src);
1760
1761 /* t1 = t0 + dest + 1 - X*/
1762
1763 t1 = tcg_temp_new();
1764 tcg_gen_add_i32(t1, t0, dest);
1765 tcg_gen_addi_i32(t1, t1, 1);
1766 tcg_gen_sub_i32(t1, t1, QREG_CC_X);
1767
1768 /* t2 = t0 ^ dest */
1769
1770 t2 = tcg_temp_new();
1771 tcg_gen_xor_i32(t2, t0, dest);
1772
1773 /* t0 = t1 ^ t2 */
1774
1775 tcg_gen_xor_i32(t0, t1, t2);
1776
1777 /*
1778 * t2 = ~t0 & 0x110
1779 * t0 = (t2 >> 2) | (t2 >> 3)
1780 *
1781 * to fit on 8bit operands, changed in:
1782 *
1783 * t2 = ~(t0 >> 3) & 0x22
1784 * t0 = t2 + t2
1785 * t0 = t0 + t2
1786 */
1787
1788 tcg_gen_shri_i32(t2, t0, 3);
1789 tcg_gen_not_i32(t2, t2);
1790 tcg_gen_andi_i32(t2, t2, 0x22);
1791 tcg_gen_add_i32(t0, t2, t2);
1792 tcg_gen_add_i32(t0, t0, t2);
1793 tcg_temp_free(t2);
1794
1795 /* return t1 - t0 */
1796
1797 tcg_gen_sub_i32(dest, t1, t0);
1798 tcg_temp_free(t0);
1799 tcg_temp_free(t1);
1800 }
1801
1802 static void bcd_flags(TCGv val)
1803 {
1804 tcg_gen_andi_i32(QREG_CC_C, val, 0x0ff);
1805 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_C);
1806
1807 tcg_gen_extract_i32(QREG_CC_C, val, 8, 1);
1808
1809 tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C);
1810 }
1811
1812 DISAS_INSN(abcd_reg)
1813 {
1814 TCGv src;
1815 TCGv dest;
1816
1817 gen_flush_flags(s); /* !Z is sticky */
1818
1819 src = gen_extend(s, DREG(insn, 0), OS_BYTE, 0);
1820 dest = gen_extend(s, DREG(insn, 9), OS_BYTE, 0);
1821 bcd_add(dest, src);
1822 gen_partset_reg(OS_BYTE, DREG(insn, 9), dest);
1823
1824 bcd_flags(dest);
1825 }
1826
1827 DISAS_INSN(abcd_mem)
1828 {
1829 TCGv src, dest, addr;
1830
1831 gen_flush_flags(s); /* !Z is sticky */
1832
1833 /* Indirect pre-decrement load (mode 4) */
1834
1835 src = gen_ea_mode(env, s, 4, REG(insn, 0), OS_BYTE,
1836 NULL_QREG, NULL, EA_LOADU, IS_USER(s));
1837 dest = gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE,
1838 NULL_QREG, &addr, EA_LOADU, IS_USER(s));
1839
1840 bcd_add(dest, src);
1841
1842 gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE, dest, &addr,
1843 EA_STORE, IS_USER(s));
1844
1845 bcd_flags(dest);
1846 }
1847
1848 DISAS_INSN(sbcd_reg)
1849 {
1850 TCGv src, dest;
1851
1852 gen_flush_flags(s); /* !Z is sticky */
1853
1854 src = gen_extend(s, DREG(insn, 0), OS_BYTE, 0);
1855 dest = gen_extend(s, DREG(insn, 9), OS_BYTE, 0);
1856
1857 bcd_sub(dest, src);
1858
1859 gen_partset_reg(OS_BYTE, DREG(insn, 9), dest);
1860
1861 bcd_flags(dest);
1862 }
1863
1864 DISAS_INSN(sbcd_mem)
1865 {
1866 TCGv src, dest, addr;
1867
1868 gen_flush_flags(s); /* !Z is sticky */
1869
1870 /* Indirect pre-decrement load (mode 4) */
1871
1872 src = gen_ea_mode(env, s, 4, REG(insn, 0), OS_BYTE,
1873 NULL_QREG, NULL, EA_LOADU, IS_USER(s));
1874 dest = gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE,
1875 NULL_QREG, &addr, EA_LOADU, IS_USER(s));
1876
1877 bcd_sub(dest, src);
1878
1879 gen_ea_mode(env, s, 4, REG(insn, 9), OS_BYTE, dest, &addr,
1880 EA_STORE, IS_USER(s));
1881
1882 bcd_flags(dest);
1883 }
1884
1885 DISAS_INSN(nbcd)
1886 {
1887 TCGv src, dest;
1888 TCGv addr;
1889
1890 gen_flush_flags(s); /* !Z is sticky */
1891
1892 SRC_EA(env, src, OS_BYTE, 0, &addr);
1893
1894 dest = tcg_const_i32(0);
1895 bcd_sub(dest, src);
1896
1897 DEST_EA(env, insn, OS_BYTE, dest, &addr);
1898
1899 bcd_flags(dest);
1900
1901 tcg_temp_free(dest);
1902 }
1903
1904 DISAS_INSN(addsub)
1905 {
1906 TCGv reg;
1907 TCGv dest;
1908 TCGv src;
1909 TCGv tmp;
1910 TCGv addr;
1911 int add;
1912 int opsize;
1913
1914 add = (insn & 0x4000) != 0;
1915 opsize = insn_opsize(insn);
1916 reg = gen_extend(s, DREG(insn, 9), opsize, 1);
1917 dest = tcg_temp_new();
1918 if (insn & 0x100) {
1919 SRC_EA(env, tmp, opsize, 1, &addr);
1920 src = reg;
1921 } else {
1922 tmp = reg;
1923 SRC_EA(env, src, opsize, 1, NULL);
1924 }
1925 if (add) {
1926 tcg_gen_add_i32(dest, tmp, src);
1927 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, src);
1928 set_cc_op(s, CC_OP_ADDB + opsize);
1929 } else {
1930 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, tmp, src);
1931 tcg_gen_sub_i32(dest, tmp, src);
1932 set_cc_op(s, CC_OP_SUBB + opsize);
1933 }
1934 gen_update_cc_add(dest, src, opsize);
1935 if (insn & 0x100) {
1936 DEST_EA(env, insn, opsize, dest, &addr);
1937 } else {
1938 gen_partset_reg(opsize, DREG(insn, 9), dest);
1939 }
1940 tcg_temp_free(dest);
1941 }
1942
1943 /* Reverse the order of the bits in REG. */
1944 DISAS_INSN(bitrev)
1945 {
1946 TCGv reg;
1947 reg = DREG(insn, 0);
1948 gen_helper_bitrev(reg, reg);
1949 }
1950
1951 DISAS_INSN(bitop_reg)
1952 {
1953 int opsize;
1954 int op;
1955 TCGv src1;
1956 TCGv src2;
1957 TCGv tmp;
1958 TCGv addr;
1959 TCGv dest;
1960
1961 if ((insn & 0x38) != 0)
1962 opsize = OS_BYTE;
1963 else
1964 opsize = OS_LONG;
1965 op = (insn >> 6) & 3;
1966 SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
1967
1968 gen_flush_flags(s);
1969 src2 = tcg_temp_new();
1970 if (opsize == OS_BYTE)
1971 tcg_gen_andi_i32(src2, DREG(insn, 9), 7);
1972 else
1973 tcg_gen_andi_i32(src2, DREG(insn, 9), 31);
1974
1975 tmp = tcg_const_i32(1);
1976 tcg_gen_shl_i32(tmp, tmp, src2);
1977 tcg_temp_free(src2);
1978
1979 tcg_gen_and_i32(QREG_CC_Z, src1, tmp);
1980
1981 dest = tcg_temp_new();
1982 switch (op) {
1983 case 1: /* bchg */
1984 tcg_gen_xor_i32(dest, src1, tmp);
1985 break;
1986 case 2: /* bclr */
1987 tcg_gen_andc_i32(dest, src1, tmp);
1988 break;
1989 case 3: /* bset */
1990 tcg_gen_or_i32(dest, src1, tmp);
1991 break;
1992 default: /* btst */
1993 break;
1994 }
1995 tcg_temp_free(tmp);
1996 if (op) {
1997 DEST_EA(env, insn, opsize, dest, &addr);
1998 }
1999 tcg_temp_free(dest);
2000 }
2001
2002 DISAS_INSN(sats)
2003 {
2004 TCGv reg;
2005 reg = DREG(insn, 0);
2006 gen_flush_flags(s);
2007 gen_helper_sats(reg, reg, QREG_CC_V);
2008 gen_logic_cc(s, reg, OS_LONG);
2009 }
2010
2011 static void gen_push(DisasContext *s, TCGv val)
2012 {
2013 TCGv tmp;
2014
2015 tmp = tcg_temp_new();
2016 tcg_gen_subi_i32(tmp, QREG_SP, 4);
2017 gen_store(s, OS_LONG, tmp, val, IS_USER(s));
2018 tcg_gen_mov_i32(QREG_SP, tmp);
2019 tcg_temp_free(tmp);
2020 }
2021
2022 static TCGv mreg(int reg)
2023 {
2024 if (reg < 8) {
2025 /* Dx */
2026 return cpu_dregs[reg];
2027 }
2028 /* Ax */
2029 return cpu_aregs[reg & 7];
2030 }
2031
2032 DISAS_INSN(movem)
2033 {
2034 TCGv addr, incr, tmp, r[16];
2035 int is_load = (insn & 0x0400) != 0;
2036 int opsize = (insn & 0x40) != 0 ? OS_LONG : OS_WORD;
2037 uint16_t mask = read_im16(env, s);
2038 int mode = extract32(insn, 3, 3);
2039 int reg0 = REG(insn, 0);
2040 int i;
2041
2042 tmp = cpu_aregs[reg0];
2043
2044 switch (mode) {
2045 case 0: /* data register direct */
2046 case 1: /* addr register direct */
2047 do_addr_fault:
2048 gen_addr_fault(s);
2049 return;
2050
2051 case 2: /* indirect */
2052 break;
2053
2054 case 3: /* indirect post-increment */
2055 if (!is_load) {
2056 /* post-increment is not allowed */
2057 goto do_addr_fault;
2058 }
2059 break;
2060
2061 case 4: /* indirect pre-decrement */
2062 if (is_load) {
2063 /* pre-decrement is not allowed */
2064 goto do_addr_fault;
2065 }
2066 /*
2067 * We want a bare copy of the address reg, without any pre-decrement
2068 * adjustment, as gen_lea would provide.
2069 */
2070 break;
2071
2072 default:
2073 tmp = gen_lea_mode(env, s, mode, reg0, opsize);
2074 if (IS_NULL_QREG(tmp)) {
2075 goto do_addr_fault;
2076 }
2077 break;
2078 }
2079
2080 addr = tcg_temp_new();
2081 tcg_gen_mov_i32(addr, tmp);
2082 incr = tcg_const_i32(opsize_bytes(opsize));
2083
2084 if (is_load) {
2085 /* memory to register */
2086 for (i = 0; i < 16; i++) {
2087 if (mask & (1 << i)) {
2088 r[i] = gen_load(s, opsize, addr, 1, IS_USER(s));
2089 tcg_gen_add_i32(addr, addr, incr);
2090 }
2091 }
2092 for (i = 0; i < 16; i++) {
2093 if (mask & (1 << i)) {
2094 tcg_gen_mov_i32(mreg(i), r[i]);
2095 tcg_temp_free(r[i]);
2096 }
2097 }
2098 if (mode == 3) {
2099 /* post-increment: movem (An)+,X */
2100 tcg_gen_mov_i32(cpu_aregs[reg0], addr);
2101 }
2102 } else {
2103 /* register to memory */
2104 if (mode == 4) {
2105 /* pre-decrement: movem X,-(An) */
2106 for (i = 15; i >= 0; i--) {
2107 if ((mask << i) & 0x8000) {
2108 tcg_gen_sub_i32(addr, addr, incr);
2109 if (reg0 + 8 == i &&
2110 m68k_feature(s->env, M68K_FEATURE_EXT_FULL)) {
2111 /*
2112 * M68020+: if the addressing register is the
2113 * register moved to memory, the value written
2114 * is the initial value decremented by the size of
2115 * the operation, regardless of how many actual
2116 * stores have been performed until this point.
2117 * M68000/M68010: the value is the initial value.
2118 */
2119 tmp = tcg_temp_new();
2120 tcg_gen_sub_i32(tmp, cpu_aregs[reg0], incr);
2121 gen_store(s, opsize, addr, tmp, IS_USER(s));
2122 tcg_temp_free(tmp);
2123 } else {
2124 gen_store(s, opsize, addr, mreg(i), IS_USER(s));
2125 }
2126 }
2127 }
2128 tcg_gen_mov_i32(cpu_aregs[reg0], addr);
2129 } else {
2130 for (i = 0; i < 16; i++) {
2131 if (mask & (1 << i)) {
2132 gen_store(s, opsize, addr, mreg(i), IS_USER(s));
2133 tcg_gen_add_i32(addr, addr, incr);
2134 }
2135 }
2136 }
2137 }
2138
2139 tcg_temp_free(incr);
2140 tcg_temp_free(addr);
2141 }
2142
2143 DISAS_INSN(movep)
2144 {
2145 uint8_t i;
2146 int16_t displ;
2147 TCGv reg;
2148 TCGv addr;
2149 TCGv abuf;
2150 TCGv dbuf;
2151
2152 displ = read_im16(env, s);
2153
2154 addr = AREG(insn, 0);
2155 reg = DREG(insn, 9);
2156
2157 abuf = tcg_temp_new();
2158 tcg_gen_addi_i32(abuf, addr, displ);
2159 dbuf = tcg_temp_new();
2160
2161 if (insn & 0x40) {
2162 i = 4;
2163 } else {
2164 i = 2;
2165 }
2166
2167 if (insn & 0x80) {
2168 for ( ; i > 0 ; i--) {
2169 tcg_gen_shri_i32(dbuf, reg, (i - 1) * 8);
2170 tcg_gen_qemu_st8(dbuf, abuf, IS_USER(s));
2171 if (i > 1) {
2172 tcg_gen_addi_i32(abuf, abuf, 2);
2173 }
2174 }
2175 } else {
2176 for ( ; i > 0 ; i--) {
2177 tcg_gen_qemu_ld8u(dbuf, abuf, IS_USER(s));
2178 tcg_gen_deposit_i32(reg, reg, dbuf, (i - 1) * 8, 8);
2179 if (i > 1) {
2180 tcg_gen_addi_i32(abuf, abuf, 2);
2181 }
2182 }
2183 }
2184 tcg_temp_free(abuf);
2185 tcg_temp_free(dbuf);
2186 }
2187
2188 DISAS_INSN(bitop_im)
2189 {
2190 int opsize;
2191 int op;
2192 TCGv src1;
2193 uint32_t mask;
2194 int bitnum;
2195 TCGv tmp;
2196 TCGv addr;
2197
2198 if ((insn & 0x38) != 0)
2199 opsize = OS_BYTE;
2200 else
2201 opsize = OS_LONG;
2202 op = (insn >> 6) & 3;
2203
2204 bitnum = read_im16(env, s);
2205 if (m68k_feature(s->env, M68K_FEATURE_M68000)) {
2206 if (bitnum & 0xfe00) {
2207 disas_undef(env, s, insn);
2208 return;
2209 }
2210 } else {
2211 if (bitnum & 0xff00) {
2212 disas_undef(env, s, insn);
2213 return;
2214 }
2215 }
2216
2217 SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
2218
2219 gen_flush_flags(s);
2220 if (opsize == OS_BYTE)
2221 bitnum &= 7;
2222 else
2223 bitnum &= 31;
2224 mask = 1 << bitnum;
2225
2226 tcg_gen_andi_i32(QREG_CC_Z, src1, mask);
2227
2228 if (op) {
2229 tmp = tcg_temp_new();
2230 switch (op) {
2231 case 1: /* bchg */
2232 tcg_gen_xori_i32(tmp, src1, mask);
2233 break;
2234 case 2: /* bclr */
2235 tcg_gen_andi_i32(tmp, src1, ~mask);
2236 break;
2237 case 3: /* bset */
2238 tcg_gen_ori_i32(tmp, src1, mask);
2239 break;
2240 default: /* btst */
2241 break;
2242 }
2243 DEST_EA(env, insn, opsize, tmp, &addr);
2244 tcg_temp_free(tmp);
2245 }
2246 }
2247
2248 static TCGv gen_get_ccr(DisasContext *s)
2249 {
2250 TCGv dest;
2251
2252 update_cc_op(s);
2253 dest = tcg_temp_new();
2254 gen_helper_get_ccr(dest, cpu_env);
2255 return dest;
2256 }
2257
2258 static TCGv gen_get_sr(DisasContext *s)
2259 {
2260 TCGv ccr;
2261 TCGv sr;
2262
2263 ccr = gen_get_ccr(s);
2264 sr = tcg_temp_new();
2265 tcg_gen_andi_i32(sr, QREG_SR, 0xffe0);
2266 tcg_gen_or_i32(sr, sr, ccr);
2267 tcg_temp_free(ccr);
2268 return sr;
2269 }
2270
2271 static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
2272 {
2273 if (ccr_only) {
2274 tcg_gen_movi_i32(QREG_CC_C, val & CCF_C ? 1 : 0);
2275 tcg_gen_movi_i32(QREG_CC_V, val & CCF_V ? -1 : 0);
2276 tcg_gen_movi_i32(QREG_CC_Z, val & CCF_Z ? 0 : 1);
2277 tcg_gen_movi_i32(QREG_CC_N, val & CCF_N ? -1 : 0);
2278 tcg_gen_movi_i32(QREG_CC_X, val & CCF_X ? 1 : 0);
2279 } else {
2280 TCGv sr = tcg_const_i32(val);
2281 gen_helper_set_sr(cpu_env, sr);
2282 tcg_temp_free(sr);
2283 }
2284 set_cc_op(s, CC_OP_FLAGS);
2285 }
2286
2287 static void gen_set_sr(DisasContext *s, TCGv val, int ccr_only)
2288 {
2289 if (ccr_only) {
2290 gen_helper_set_ccr(cpu_env, val);
2291 } else {
2292 gen_helper_set_sr(cpu_env, val);
2293 }
2294 set_cc_op(s, CC_OP_FLAGS);
2295 }
2296
2297 static void gen_move_to_sr(CPUM68KState *env, DisasContext *s, uint16_t insn,
2298 bool ccr_only)
2299 {
2300 if ((insn & 0x3f) == 0x3c) {
2301 uint16_t val;
2302 val = read_im16(env, s);
2303 gen_set_sr_im(s, val, ccr_only);
2304 } else {
2305 TCGv src;
2306 SRC_EA(env, src, OS_WORD, 0, NULL);
2307 gen_set_sr(s, src, ccr_only);
2308 }
2309 }
2310
2311 DISAS_INSN(arith_im)
2312 {
2313 int op;
2314 TCGv im;
2315 TCGv src1;
2316 TCGv dest;
2317 TCGv addr;
2318 int opsize;
2319 bool with_SR = ((insn & 0x3f) == 0x3c);
2320
2321 op = (insn >> 9) & 7;
2322 opsize = insn_opsize(insn);
2323 switch (opsize) {
2324 case OS_BYTE:
2325 im = tcg_const_i32((int8_t)read_im8(env, s));
2326 break;
2327 case OS_WORD:
2328 im = tcg_const_i32((int16_t)read_im16(env, s));
2329 break;
2330 case OS_LONG:
2331 im = tcg_const_i32(read_im32(env, s));
2332 break;
2333 default:
2334 g_assert_not_reached();
2335 }
2336
2337 if (with_SR) {
2338 /* SR/CCR can only be used with andi/eori/ori */
2339 if (op == 2 || op == 3 || op == 6) {
2340 disas_undef(env, s, insn);
2341 return;
2342 }
2343 switch (opsize) {
2344 case OS_BYTE:
2345 src1 = gen_get_ccr(s);
2346 break;
2347 case OS_WORD:
2348 if (IS_USER(s)) {
2349 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
2350 return;
2351 }
2352 src1 = gen_get_sr(s);
2353 break;
2354 default:
2355 /* OS_LONG; others already g_assert_not_reached. */
2356 disas_undef(env, s, insn);
2357 return;
2358 }
2359 } else {
2360 SRC_EA(env, src1, opsize, 1, (op == 6) ? NULL : &addr);
2361 }
2362 dest = tcg_temp_new();
2363 switch (op) {
2364 case 0: /* ori */
2365 tcg_gen_or_i32(dest, src1, im);
2366 if (with_SR) {
2367 gen_set_sr(s, dest, opsize == OS_BYTE);
2368 } else {
2369 DEST_EA(env, insn, opsize, dest, &addr);
2370 gen_logic_cc(s, dest, opsize);
2371 }
2372 break;
2373 case 1: /* andi */
2374 tcg_gen_and_i32(dest, src1, im);
2375 if (with_SR) {
2376 gen_set_sr(s, dest, opsize == OS_BYTE);
2377 } else {
2378 DEST_EA(env, insn, opsize, dest, &addr);
2379 gen_logic_cc(s, dest, opsize);
2380 }
2381 break;
2382 case 2: /* subi */
2383 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, src1, im);
2384 tcg_gen_sub_i32(dest, src1, im);
2385 gen_update_cc_add(dest, im, opsize);
2386 set_cc_op(s, CC_OP_SUBB + opsize);
2387 DEST_EA(env, insn, opsize, dest, &addr);
2388 break;
2389 case 3: /* addi */
2390 tcg_gen_add_i32(dest, src1, im);
2391 gen_update_cc_add(dest, im, opsize);
2392 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, im);
2393 set_cc_op(s, CC_OP_ADDB + opsize);
2394 DEST_EA(env, insn, opsize, dest, &addr);
2395 break;
2396 case 5: /* eori */
2397 tcg_gen_xor_i32(dest, src1, im);
2398 if (with_SR) {
2399 gen_set_sr(s, dest, opsize == OS_BYTE);
2400 } else {
2401 DEST_EA(env, insn, opsize, dest, &addr);
2402 gen_logic_cc(s, dest, opsize);
2403 }
2404 break;
2405 case 6: /* cmpi */
2406 gen_update_cc_cmp(s, src1, im, opsize);
2407 break;
2408 default:
2409 abort();
2410 }
2411 tcg_temp_free(im);
2412 tcg_temp_free(dest);
2413 }
2414
2415 DISAS_INSN(cas)
2416 {
2417 int opsize;
2418 TCGv addr;
2419 uint16_t ext;
2420 TCGv load;
2421 TCGv cmp;
2422 MemOp opc;
2423
2424 switch ((insn >> 9) & 3) {
2425 case 1:
2426 opsize = OS_BYTE;
2427 opc = MO_SB;
2428 break;
2429 case 2:
2430 opsize = OS_WORD;
2431 opc = MO_TESW;
2432 break;
2433 case 3:
2434 opsize = OS_LONG;
2435 opc = MO_TESL;
2436 break;
2437 default:
2438 g_assert_not_reached();
2439 }
2440
2441 ext = read_im16(env, s);
2442
2443 /* cas Dc,Du,<EA> */
2444
2445 addr = gen_lea(env, s, insn, opsize);
2446 if (IS_NULL_QREG(addr)) {
2447 gen_addr_fault(s);
2448 return;
2449 }
2450
2451 cmp = gen_extend(s, DREG(ext, 0), opsize, 1);
2452
2453 /*
2454 * if <EA> == Dc then
2455 * <EA> = Du
2456 * Dc = <EA> (because <EA> == Dc)
2457 * else
2458 * Dc = <EA>
2459 */
2460
2461 load = tcg_temp_new();
2462 tcg_gen_atomic_cmpxchg_i32(load, addr, cmp, DREG(ext, 6),
2463 IS_USER(s), opc);
2464 /* update flags before setting cmp to load */
2465 gen_update_cc_cmp(s, load, cmp, opsize);
2466 gen_partset_reg(opsize, DREG(ext, 0), load);
2467
2468 tcg_temp_free(load);
2469
2470 switch (extract32(insn, 3, 3)) {
2471 case 3: /* Indirect postincrement. */
2472 tcg_gen_addi_i32(AREG(insn, 0), addr, opsize_bytes(opsize));
2473 break;
2474 case 4: /* Indirect predecrememnt. */
2475 tcg_gen_mov_i32(AREG(insn, 0), addr);
2476 break;
2477 }
2478 }
2479
2480 DISAS_INSN(cas2w)
2481 {
2482 uint16_t ext1, ext2;
2483 TCGv addr1, addr2;
2484 TCGv regs;
2485
2486 /* cas2 Dc1:Dc2,Du1:Du2,(Rn1):(Rn2) */
2487
2488 ext1 = read_im16(env, s);
2489
2490 if (ext1 & 0x8000) {
2491 /* Address Register */
2492 addr1 = AREG(ext1, 12);
2493 } else {
2494 /* Data Register */
2495 addr1 = DREG(ext1, 12);
2496 }
2497
2498 ext2 = read_im16(env, s);
2499 if (ext2 & 0x8000) {
2500 /* Address Register */
2501 addr2 = AREG(ext2, 12);
2502 } else {
2503 /* Data Register */
2504 addr2 = DREG(ext2, 12);
2505 }
2506
2507 /*
2508 * if (R1) == Dc1 && (R2) == Dc2 then
2509 * (R1) = Du1
2510 * (R2) = Du2
2511 * else
2512 * Dc1 = (R1)
2513 * Dc2 = (R2)
2514 */
2515
2516 regs = tcg_const_i32(REG(ext2, 6) |
2517 (REG(ext1, 6) << 3) |
2518 (REG(ext2, 0) << 6) |
2519 (REG(ext1, 0) << 9));
2520 if (tb_cflags(s->base.tb) & CF_PARALLEL) {
2521 gen_helper_exit_atomic(cpu_env);
2522 } else {
2523 gen_helper_cas2w(cpu_env, regs, addr1, addr2);
2524 }
2525 tcg_temp_free(regs);
2526
2527 /* Note that cas2w also assigned to env->cc_op. */
2528 s->cc_op = CC_OP_CMPW;
2529 s->cc_op_synced = 1;
2530 }
2531
2532 DISAS_INSN(cas2l)
2533 {
2534 uint16_t ext1, ext2;
2535 TCGv addr1, addr2, regs;
2536
2537 /* cas2 Dc1:Dc2,Du1:Du2,(Rn1):(Rn2) */
2538
2539 ext1 = read_im16(env, s);
2540
2541 if (ext1 & 0x8000) {
2542 /* Address Register */
2543 addr1 = AREG(ext1, 12);
2544 } else {
2545 /* Data Register */
2546 addr1 = DREG(ext1, 12);
2547 }
2548
2549 ext2 = read_im16(env, s);
2550 if (ext2 & 0x8000) {
2551 /* Address Register */
2552 addr2 = AREG(ext2, 12);
2553 } else {
2554 /* Data Register */
2555 addr2 = DREG(ext2, 12);
2556 }
2557
2558 /*
2559 * if (R1) == Dc1 && (R2) == Dc2 then
2560 * (R1) = Du1
2561 * (R2) = Du2
2562 * else
2563 * Dc1 = (R1)
2564 * Dc2 = (R2)
2565 */
2566
2567 regs = tcg_const_i32(REG(ext2, 6) |
2568 (REG(ext1, 6) << 3) |
2569 (REG(ext2, 0) << 6) |
2570 (REG(ext1, 0) << 9));
2571 if (tb_cflags(s->base.tb) & CF_PARALLEL) {
2572 gen_helper_cas2l_parallel(cpu_env, regs, addr1, addr2);
2573 } else {
2574 gen_helper_cas2l(cpu_env, regs, addr1, addr2);
2575 }
2576 tcg_temp_free(regs);
2577
2578 /* Note that cas2l also assigned to env->cc_op. */
2579 s->cc_op = CC_OP_CMPL;
2580 s->cc_op_synced = 1;
2581 }
2582
2583 DISAS_INSN(byterev)
2584 {
2585 TCGv reg;
2586
2587 reg = DREG(insn, 0);
2588 tcg_gen_bswap32_i32(reg, reg);
2589 }
2590
2591 DISAS_INSN(move)
2592 {
2593 TCGv src;
2594 TCGv dest;
2595 int op;
2596 int opsize;
2597
2598 switch (insn >> 12) {
2599 case 1: /* move.b */
2600 opsize = OS_BYTE;
2601 break;
2602 case 2: /* move.l */
2603 opsize = OS_LONG;
2604 break;
2605 case 3: /* move.w */
2606 opsize = OS_WORD;
2607 break;
2608 default:
2609 abort();
2610 }
2611 SRC_EA(env, src, opsize, 1, NULL);
2612 op = (insn >> 6) & 7;
2613 if (op == 1) {
2614 /* movea */
2615 /* The value will already have been sign extended. */
2616 dest = AREG(insn, 9);
2617 tcg_gen_mov_i32(dest, src);
2618 } else {
2619 /* normal move */
2620 uint16_t dest_ea;
2621 dest_ea = ((insn >> 9) & 7) | (op << 3);
2622 DEST_EA(env, dest_ea, opsize, src, NULL);
2623 /* This will be correct because loads sign extend. */
2624 gen_logic_cc(s, src, opsize);
2625 }
2626 }
2627
2628 DISAS_INSN(negx)
2629 {
2630 TCGv z;
2631 TCGv src;
2632 TCGv addr;
2633 int opsize;
2634
2635 opsize = insn_opsize(insn);
2636 SRC_EA(env, src, opsize, 1, &addr);
2637
2638 gen_flush_flags(s); /* compute old Z */
2639
2640 /*
2641 * Perform substract with borrow.
2642 * (X, N) = -(src + X);
2643 */
2644
2645 z = tcg_const_i32(0);
2646 tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, z, QREG_CC_X, z);
2647 tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, z, z, QREG_CC_N, QREG_CC_X);
2648 tcg_temp_free(z);
2649 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
2650
2651 tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1);
2652
2653 /*
2654 * Compute signed-overflow for negation. The normal formula for
2655 * subtraction is (res ^ src) & (src ^ dest), but with dest==0
2656 * this simplies to res & src.
2657 */
2658
2659 tcg_gen_and_i32(QREG_CC_V, QREG_CC_N, src);
2660
2661 /* Copy the rest of the results into place. */
2662 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
2663 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
2664
2665 set_cc_op(s, CC_OP_FLAGS);
2666
2667 /* result is in QREG_CC_N */
2668
2669 DEST_EA(env, insn, opsize, QREG_CC_N, &addr);
2670 }
2671
2672 DISAS_INSN(lea)
2673 {
2674 TCGv reg;
2675 TCGv tmp;
2676
2677 reg = AREG(insn, 9);
2678 tmp = gen_lea(env, s, insn, OS_LONG);
2679 if (IS_NULL_QREG(tmp)) {
2680 gen_addr_fault(s);
2681 return;
2682 }
2683 tcg_gen_mov_i32(reg, tmp);
2684 }
2685
2686 DISAS_INSN(clr)
2687 {
2688 int opsize;
2689 TCGv zero;
2690
2691 zero = tcg_const_i32(0);
2692
2693 opsize = insn_opsize(insn);
2694 DEST_EA(env, insn, opsize, zero, NULL);
2695 gen_logic_cc(s, zero, opsize);
2696 tcg_temp_free(zero);
2697 }
2698
2699 DISAS_INSN(move_from_ccr)
2700 {
2701 TCGv ccr;
2702
2703 ccr = gen_get_ccr(s);
2704 DEST_EA(env, insn, OS_WORD, ccr, NULL);
2705 }
2706
2707 DISAS_INSN(neg)
2708 {
2709 TCGv src1;
2710 TCGv dest;
2711 TCGv addr;
2712 int opsize;
2713
2714 opsize = insn_opsize(insn);
2715 SRC_EA(env, src1, opsize, 1, &addr);
2716 dest = tcg_temp_new();
2717 tcg_gen_neg_i32(dest, src1);
2718 set_cc_op(s, CC_OP_SUBB + opsize);
2719 gen_update_cc_add(dest, src1, opsize);
2720 tcg_gen_setcondi_i32(TCG_COND_NE, QREG_CC_X, dest, 0);
2721 DEST_EA(env, insn, opsize, dest, &addr);
2722 tcg_temp_free(dest);
2723 }
2724
2725 DISAS_INSN(move_to_ccr)
2726 {
2727 gen_move_to_sr(env, s, insn, true);
2728 }
2729
2730 DISAS_INSN(not)
2731 {
2732 TCGv src1;
2733 TCGv dest;
2734 TCGv addr;
2735 int opsize;
2736
2737 opsize = insn_opsize(insn);
2738 SRC_EA(env, src1, opsize, 1, &addr);
2739 dest = tcg_temp_new();
2740 tcg_gen_not_i32(dest, src1);
2741 DEST_EA(env, insn, opsize, dest, &addr);
2742 gen_logic_cc(s, dest, opsize);
2743 }
2744
2745 DISAS_INSN(swap)
2746 {
2747 TCGv src1;
2748 TCGv src2;
2749 TCGv reg;
2750
2751 src1 = tcg_temp_new();
2752 src2 = tcg_temp_new();
2753 reg = DREG(insn, 0);
2754 tcg_gen_shli_i32(src1, reg, 16);
2755 tcg_gen_shri_i32(src2, reg, 16);
2756 tcg_gen_or_i32(reg, src1, src2);
2757 tcg_temp_free(src2);
2758 tcg_temp_free(src1);
2759 gen_logic_cc(s, reg, OS_LONG);
2760 }
2761
2762 DISAS_INSN(bkpt)
2763 {
2764 gen_exception(s, s->base.pc_next, EXCP_DEBUG);
2765 }
2766
2767 DISAS_INSN(pea)
2768 {
2769 TCGv tmp;
2770
2771 tmp = gen_lea(env, s, insn, OS_LONG);
2772 if (IS_NULL_QREG(tmp)) {
2773 gen_addr_fault(s);
2774 return;
2775 }
2776 gen_push(s, tmp);
2777 }
2778
2779 DISAS_INSN(ext)
2780 {
2781 int op;
2782 TCGv reg;
2783 TCGv tmp;
2784
2785 reg = DREG(insn, 0);
2786 op = (insn >> 6) & 7;
2787 tmp = tcg_temp_new();
2788 if (op == 3)
2789 tcg_gen_ext16s_i32(tmp, reg);
2790 else
2791 tcg_gen_ext8s_i32(tmp, reg);
2792 if (op == 2)
2793 gen_partset_reg(OS_WORD, reg, tmp);
2794 else
2795 tcg_gen_mov_i32(reg, tmp);
2796 gen_logic_cc(s, tmp, OS_LONG);
2797 tcg_temp_free(tmp);
2798 }
2799
2800 DISAS_INSN(tst)
2801 {
2802 int opsize;
2803 TCGv tmp;
2804
2805 opsize = insn_opsize(insn);
2806 SRC_EA(env, tmp, opsize, 1, NULL);
2807 gen_logic_cc(s, tmp, opsize);
2808 }
2809
2810 DISAS_INSN(pulse)
2811 {
2812 /* Implemented as a NOP. */
2813 }
2814
2815 DISAS_INSN(illegal)
2816 {
2817 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
2818 }
2819
2820 /* ??? This should be atomic. */
2821 DISAS_INSN(tas)
2822 {
2823 TCGv dest;
2824 TCGv src1;
2825 TCGv addr;
2826
2827 dest = tcg_temp_new();
2828 SRC_EA(env, src1, OS_BYTE, 1, &addr);
2829 gen_logic_cc(s, src1, OS_BYTE);
2830 tcg_gen_ori_i32(dest, src1, 0x80);
2831 DEST_EA(env, insn, OS_BYTE, dest, &addr);
2832 tcg_temp_free(dest);
2833 }
2834
2835 DISAS_INSN(mull)
2836 {
2837 uint16_t ext;
2838 TCGv src1;
2839 int sign;
2840
2841 ext = read_im16(env, s);
2842
2843 sign = ext & 0x800;
2844
2845 if (ext & 0x400) {
2846 if (!m68k_feature(s->env, M68K_FEATURE_QUAD_MULDIV)) {
2847 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
2848 return;
2849 }
2850
2851 SRC_EA(env, src1, OS_LONG, 0, NULL);
2852
2853 if (sign) {
2854 tcg_gen_muls2_i32(QREG_CC_Z, QREG_CC_N, src1, DREG(ext, 12));
2855 } else {
2856 tcg_gen_mulu2_i32(QREG_CC_Z, QREG_CC_N, src1, DREG(ext, 12));
2857 }
2858 /* if Dl == Dh, 68040 returns low word */
2859 tcg_gen_mov_i32(DREG(ext, 0), QREG_CC_N);
2860 tcg_gen_mov_i32(DREG(ext, 12), QREG_CC_Z);
2861 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N);
2862
2863 tcg_gen_movi_i32(QREG_CC_V, 0);
2864 tcg_gen_movi_i32(QREG_CC_C, 0);
2865
2866 set_cc_op(s, CC_OP_FLAGS);
2867 return;
2868 }
2869 SRC_EA(env, src1, OS_LONG, 0, NULL);
2870 if (m68k_feature(s->env, M68K_FEATURE_M68000)) {
2871 tcg_gen_movi_i32(QREG_CC_C, 0);
2872 if (sign) {
2873 tcg_gen_muls2_i32(QREG_CC_N, QREG_CC_V, src1, DREG(ext, 12));
2874 /* QREG_CC_V is -(QREG_CC_V != (QREG_CC_N >> 31)) */
2875 tcg_gen_sari_i32(QREG_CC_Z, QREG_CC_N, 31);
2876 tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, QREG_CC_Z);
2877 } else {
2878 tcg_gen_mulu2_i32(QREG_CC_N, QREG_CC_V, src1, DREG(ext, 12));
2879 /* QREG_CC_V is -(QREG_CC_V != 0), use QREG_CC_C as 0 */
2880 tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, QREG_CC_C);
2881 }
2882 tcg_gen_neg_i32(QREG_CC_V, QREG_CC_V);
2883 tcg_gen_mov_i32(DREG(ext, 12), QREG_CC_N);
2884
2885 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
2886
2887 set_cc_op(s, CC_OP_FLAGS);
2888 } else {
2889 /*
2890 * The upper 32 bits of the product are discarded, so
2891 * muls.l and mulu.l are functionally equivalent.
2892 */
2893 tcg_gen_mul_i32(DREG(ext, 12), src1, DREG(ext, 12));
2894 gen_logic_cc(s, DREG(ext, 12), OS_LONG);
2895 }
2896 }
2897
2898 static void gen_link(DisasContext *s, uint16_t insn, int32_t offset)
2899 {
2900 TCGv reg;
2901 TCGv tmp;
2902
2903 reg = AREG(insn, 0);
2904 tmp = tcg_temp_new();
2905 tcg_gen_subi_i32(tmp, QREG_SP, 4);
2906 gen_store(s, OS_LONG, tmp, reg, IS_USER(s));
2907 if ((insn & 7) != 7) {
2908 tcg_gen_mov_i32(reg, tmp);
2909 }
2910 tcg_gen_addi_i32(QREG_SP, tmp, offset);
2911 tcg_temp_free(tmp);
2912 }
2913
2914 DISAS_INSN(link)
2915 {
2916 int16_t offset;
2917
2918 offset = read_im16(env, s);
2919 gen_link(s, insn, offset);
2920 }
2921
2922 DISAS_INSN(linkl)
2923 {
2924 int32_t offset;
2925
2926 offset = read_im32(env, s);
2927 gen_link(s, insn, offset);
2928 }
2929
2930 DISAS_INSN(unlk)
2931 {
2932 TCGv src;
2933 TCGv reg;
2934 TCGv tmp;
2935
2936 src = tcg_temp_new();
2937 reg = AREG(insn, 0);
2938 tcg_gen_mov_i32(src, reg);
2939 tmp = gen_load(s, OS_LONG, src, 0, IS_USER(s));
2940 tcg_gen_mov_i32(reg, tmp);
2941 tcg_gen_addi_i32(QREG_SP, src, 4);
2942 tcg_temp_free(src);
2943 tcg_temp_free(tmp);
2944 }
2945
2946 #if defined(CONFIG_SOFTMMU)
2947 DISAS_INSN(reset)
2948 {
2949 if (IS_USER(s)) {
2950 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
2951 return;
2952 }
2953
2954 gen_helper_reset(cpu_env);
2955 }
2956 #endif
2957
2958 DISAS_INSN(nop)
2959 {
2960 }
2961
2962 DISAS_INSN(rtd)
2963 {
2964 TCGv tmp;
2965 int16_t offset = read_im16(env, s);
2966
2967 tmp = gen_load(s, OS_LONG, QREG_SP, 0, IS_USER(s));
2968 tcg_gen_addi_i32(QREG_SP, QREG_SP, offset + 4);
2969 gen_jmp(s, tmp);
2970 }
2971
2972 DISAS_INSN(rts)
2973 {
2974 TCGv tmp;
2975
2976 tmp = gen_load(s, OS_LONG, QREG_SP, 0, IS_USER(s));
2977 tcg_gen_addi_i32(QREG_SP, QREG_SP, 4);
2978 gen_jmp(s, tmp);
2979 }
2980
2981 DISAS_INSN(jump)
2982 {
2983 TCGv tmp;
2984
2985 /*
2986 * Load the target address first to ensure correct exception
2987 * behavior.
2988 */
2989 tmp = gen_lea(env, s, insn, OS_LONG);
2990 if (IS_NULL_QREG(tmp)) {
2991 gen_addr_fault(s);
2992 return;
2993 }
2994 if ((insn & 0x40) == 0) {
2995 /* jsr */
2996 gen_push(s, tcg_const_i32(s->pc));
2997 }
2998 gen_jmp(s, tmp);
2999 }
3000
3001 DISAS_INSN(addsubq)
3002 {
3003 TCGv src;
3004 TCGv dest;
3005 TCGv val;
3006 int imm;
3007 TCGv addr;
3008 int opsize;
3009
3010 if ((insn & 070) == 010) {
3011 /* Operation on address register is always long. */
3012 opsize = OS_LONG;
3013 } else {
3014 opsize = insn_opsize(insn);
3015 }
3016 SRC_EA(env, src, opsize, 1, &addr);
3017 imm = (insn >> 9) & 7;
3018 if (imm == 0) {
3019 imm = 8;
3020 }
3021 val = tcg_const_i32(imm);
3022 dest = tcg_temp_new();
3023 tcg_gen_mov_i32(dest, src);
3024 if ((insn & 0x38) == 0x08) {
3025 /*
3026 * Don't update condition codes if the destination is an
3027 * address register.
3028 */
3029 if (insn & 0x0100) {
3030 tcg_gen_sub_i32(dest, dest, val);
3031 } else {
3032 tcg_gen_add_i32(dest, dest, val);
3033 }
3034 } else {
3035 if (insn & 0x0100) {
3036 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val);
3037 tcg_gen_sub_i32(dest, dest, val);
3038 set_cc_op(s, CC_OP_SUBB + opsize);
3039 } else {
3040 tcg_gen_add_i32(dest, dest, val);
3041 tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val);
3042 set_cc_op(s, CC_OP_ADDB + opsize);
3043 }
3044 gen_update_cc_add(dest, val, opsize);
3045 }
3046 tcg_temp_free(val);
3047 DEST_EA(env, insn, opsize, dest, &addr);
3048 tcg_temp_free(dest);
3049 }
3050
3051 DISAS_INSN(tpf)
3052 {
3053 switch (insn & 7) {
3054 case 2: /* One extension word. */
3055 s->pc += 2;
3056 break;
3057 case 3: /* Two extension words. */
3058 s->pc += 4;
3059 break;
3060 case 4: /* No extension words. */
3061 break;
3062 default:
3063 disas_undef(env, s, insn);
3064 }
3065 }
3066
3067 DISAS_INSN(branch)
3068 {
3069 int32_t offset;
3070 uint32_t base;
3071 int op;
3072
3073 base = s->pc;
3074 op = (insn >> 8) & 0xf;
3075 offset = (int8_t)insn;
3076 if (offset == 0) {
3077 offset = (int16_t)read_im16(env, s);
3078 } else if (offset == -1) {
3079 offset = read_im32(env, s);
3080 }
3081 if (op == 1) {
3082 /* bsr */
3083 gen_push(s, tcg_const_i32(s->pc));
3084 }
3085 if (op > 1) {
3086 /* Bcc */
3087 TCGLabel *l1 = gen_new_label();
3088 gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
3089 gen_jmp_tb(s, 1, base + offset);
3090 gen_set_label(l1);
3091 gen_jmp_tb(s, 0, s->pc);
3092 } else {
3093 /* Unconditional branch. */
3094 update_cc_op(s);
3095 gen_jmp_tb(s, 0, base + offset);
3096 }
3097 }
3098
3099 DISAS_INSN(moveq)
3100 {
3101 tcg_gen_movi_i32(DREG(insn, 9), (int8_t)insn);
3102 gen_logic_cc(s, DREG(insn, 9), OS_LONG);
3103 }
3104
3105 DISAS_INSN(mvzs)
3106 {
3107 int opsize;
3108 TCGv src;
3109 TCGv reg;
3110
3111 if (insn & 0x40)
3112 opsize = OS_WORD;
3113 else
3114 opsize = OS_BYTE;
3115 SRC_EA(env, src, opsize, (insn & 0x80) == 0, NULL);
3116 reg = DREG(insn, 9);
3117 tcg_gen_mov_i32(reg, src);
3118 gen_logic_cc(s, src, opsize);
3119 }
3120
3121 DISAS_INSN(or)
3122 {
3123 TCGv reg;
3124 TCGv dest;
3125 TCGv src;
3126 TCGv addr;
3127 int opsize;
3128
3129 opsize = insn_opsize(insn);
3130 reg = gen_extend(s, DREG(insn, 9), opsize, 0);
3131 dest = tcg_temp_new();
3132 if (insn & 0x100) {
3133 SRC_EA(env, src, opsize, 0, &addr);
3134 tcg_gen_or_i32(dest, src, reg);
3135 DEST_EA(env, insn, opsize, dest, &addr);
3136 } else {
3137 SRC_EA(env, src, opsize, 0, NULL);
3138 tcg_gen_or_i32(dest, src, reg);
3139 gen_partset_reg(opsize, DREG(insn, 9), dest);
3140 }
3141 gen_logic_cc(s, dest, opsize);
3142 tcg_temp_free(dest);
3143 }
3144
3145 DISAS_INSN(suba)
3146 {
3147 TCGv src;
3148 TCGv reg;
3149
3150 SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL);
3151 reg = AREG(insn, 9);
3152 tcg_gen_sub_i32(reg, reg, src);
3153 }
3154
3155 static inline void gen_subx(DisasContext *s, TCGv src, TCGv dest, int opsize)
3156 {
3157 TCGv tmp;
3158
3159 gen_flush_flags(s); /* compute old Z */
3160
3161 /*
3162 * Perform substract with borrow.
3163 * (X, N) = dest - (src + X);
3164 */
3165
3166 tmp = tcg_const_i32(0);
3167 tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, tmp, QREG_CC_X, tmp);
3168 tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, dest, tmp, QREG_CC_N, QREG_CC_X);
3169 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
3170 tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1);
3171
3172 /* Compute signed-overflow for substract. */
3173
3174 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, dest);
3175 tcg_gen_xor_i32(tmp, dest, src);
3176 tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, tmp);
3177 tcg_temp_free(tmp);
3178
3179 /* Copy the rest of the results into place. */
3180 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
3181 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
3182
3183 set_cc_op(s, CC_OP_FLAGS);
3184
3185 /* result is in QREG_CC_N */
3186 }
3187
3188 DISAS_INSN(subx_reg)
3189 {
3190 TCGv dest;
3191 TCGv src;
3192 int opsize;
3193
3194 opsize = insn_opsize(insn);
3195
3196 src = gen_extend(s, DREG(insn, 0), opsize, 1);
3197 dest = gen_extend(s, DREG(insn, 9), opsize, 1);
3198
3199 gen_subx(s, src, dest, opsize);
3200
3201 gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N);
3202 }
3203
3204 DISAS_INSN(subx_mem)
3205 {
3206 TCGv src;
3207 TCGv addr_src;
3208 TCGv dest;
3209 TCGv addr_dest;
3210 int opsize;
3211
3212 opsize = insn_opsize(insn);
3213
3214 addr_src = AREG(insn, 0);
3215 tcg_gen_subi_i32(addr_src, addr_src, opsize_bytes(opsize));
3216 src = gen_load(s, opsize, addr_src, 1, IS_USER(s));
3217
3218 addr_dest = AREG(insn, 9);
3219 tcg_gen_subi_i32(addr_dest, addr_dest, opsize_bytes(opsize));
3220 dest = gen_load(s, opsize, addr_dest, 1, IS_USER(s));
3221
3222 gen_subx(s, src, dest, opsize);
3223
3224 gen_store(s, opsize, addr_dest, QREG_CC_N, IS_USER(s));
3225
3226 tcg_temp_free(dest);
3227 tcg_temp_free(src);
3228 }
3229
3230 DISAS_INSN(mov3q)
3231 {
3232 TCGv src;
3233 int val;
3234
3235 val = (insn >> 9) & 7;
3236 if (val == 0)
3237 val = -1;
3238 src = tcg_const_i32(val);
3239 gen_logic_cc(s, src, OS_LONG);
3240 DEST_EA(env, insn, OS_LONG, src, NULL);
3241 tcg_temp_free(src);
3242 }
3243
3244 DISAS_INSN(cmp)
3245 {
3246 TCGv src;
3247 TCGv reg;
3248 int opsize;
3249
3250 opsize = insn_opsize(insn);
3251 SRC_EA(env, src, opsize, 1, NULL);
3252 reg = gen_extend(s, DREG(insn, 9), opsize, 1);
3253 gen_update_cc_cmp(s, reg, src, opsize);
3254 }
3255
3256 DISAS_INSN(cmpa)
3257 {
3258 int opsize;
3259 TCGv src;
3260 TCGv reg;
3261
3262 if (insn & 0x100) {
3263 opsize = OS_LONG;
3264 } else {
3265 opsize = OS_WORD;
3266 }
3267 SRC_EA(env, src, opsize, 1, NULL);
3268 reg = AREG(insn, 9);
3269 gen_update_cc_cmp(s, reg, src, OS_LONG);
3270 }
3271
3272 DISAS_INSN(cmpm)
3273 {
3274 int opsize = insn_opsize(insn);
3275 TCGv src, dst;
3276
3277 /* Post-increment load (mode 3) from Ay. */
3278 src = gen_ea_mode(env, s, 3, REG(insn, 0), opsize,
3279 NULL_QREG, NULL, EA_LOADS, IS_USER(s));
3280 /* Post-increment load (mode 3) from Ax. */
3281 dst = gen_ea_mode(env, s, 3, REG(insn, 9), opsize,
3282 NULL_QREG, NULL, EA_LOADS, IS_USER(s));
3283
3284 gen_update_cc_cmp(s, dst, src, opsize);
3285 }
3286
3287 DISAS_INSN(eor)
3288 {
3289 TCGv src;
3290 TCGv dest;
3291 TCGv addr;
3292 int opsize;
3293
3294 opsize = insn_opsize(insn);
3295
3296 SRC_EA(env, src, opsize, 0, &addr);
3297 dest = tcg_temp_new();
3298 tcg_gen_xor_i32(dest, src, DREG(insn, 9));
3299 gen_logic_cc(s, dest, opsize);
3300 DEST_EA(env, insn, opsize, dest, &addr);
3301 tcg_temp_free(dest);
3302 }
3303
3304 static void do_exg(TCGv reg1, TCGv reg2)
3305 {
3306 TCGv temp = tcg_temp_new();
3307 tcg_gen_mov_i32(temp, reg1);
3308 tcg_gen_mov_i32(reg1, reg2);
3309 tcg_gen_mov_i32(reg2, temp);
3310 tcg_temp_free(temp);
3311 }
3312
3313 DISAS_INSN(exg_dd)
3314 {
3315 /* exchange Dx and Dy */
3316 do_exg(DREG(insn, 9), DREG(insn, 0));
3317 }
3318
3319 DISAS_INSN(exg_aa)
3320 {
3321 /* exchange Ax and Ay */
3322 do_exg(AREG(insn, 9), AREG(insn, 0));
3323 }
3324
3325 DISAS_INSN(exg_da)
3326 {
3327 /* exchange Dx and Ay */
3328 do_exg(DREG(insn, 9), AREG(insn, 0));
3329 }
3330
3331 DISAS_INSN(and)
3332 {
3333 TCGv src;
3334 TCGv reg;
3335 TCGv dest;
3336 TCGv addr;
3337 int opsize;
3338
3339 dest = tcg_temp_new();
3340
3341 opsize = insn_opsize(insn);
3342 reg = DREG(insn, 9);
3343 if (insn & 0x100) {
3344 SRC_EA(env, src, opsize, 0, &addr);
3345 tcg_gen_and_i32(dest, src, reg);
3346 DEST_EA(env, insn, opsize, dest, &addr);
3347 } else {
3348 SRC_EA(env, src, opsize, 0, NULL);
3349 tcg_gen_and_i32(dest, src, reg);
3350 gen_partset_reg(opsize, reg, dest);
3351 }
3352 gen_logic_cc(s, dest, opsize);
3353 tcg_temp_free(dest);
3354 }
3355
3356 DISAS_INSN(adda)
3357 {
3358 TCGv src;
3359 TCGv reg;
3360
3361 SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL);
3362 reg = AREG(insn, 9);
3363 tcg_gen_add_i32(reg, reg, src);
3364 }
3365
3366 static inline void gen_addx(DisasContext *s, TCGv src, TCGv dest, int opsize)
3367 {
3368 TCGv tmp;
3369
3370 gen_flush_flags(s); /* compute old Z */
3371
3372 /*
3373 * Perform addition with carry.
3374 * (X, N) = src + dest + X;
3375 */
3376
3377 tmp = tcg_const_i32(0);
3378 tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_X, tmp, dest, tmp);
3379 tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_N, QREG_CC_X, src, tmp);
3380 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
3381
3382 /* Compute signed-overflow for addition. */
3383
3384 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, src);
3385 tcg_gen_xor_i32(tmp, dest, src);
3386 tcg_gen_andc_i32(QREG_CC_V, QREG_CC_V, tmp);
3387 tcg_temp_free(tmp);
3388
3389 /* Copy the rest of the results into place. */
3390 tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
3391 tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
3392
3393 set_cc_op(s, CC_OP_FLAGS);
3394
3395 /* result is in QREG_CC_N */
3396 }
3397
3398 DISAS_INSN(addx_reg)
3399 {
3400 TCGv dest;
3401 TCGv src;
3402 int opsize;
3403
3404 opsize = insn_opsize(insn);
3405
3406 dest = gen_extend(s, DREG(insn, 9), opsize, 1);
3407 src = gen_extend(s, DREG(insn, 0), opsize, 1);
3408
3409 gen_addx(s, src, dest, opsize);
3410
3411 gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N);
3412 }
3413
3414 DISAS_INSN(addx_mem)
3415 {
3416 TCGv src;
3417 TCGv addr_src;
3418 TCGv dest;
3419 TCGv addr_dest;
3420 int opsize;
3421
3422 opsize = insn_opsize(insn);
3423
3424 addr_src = AREG(insn, 0);
3425 tcg_gen_subi_i32(addr_src, addr_src, opsize_bytes(opsize));
3426 src = gen_load(s, opsize, addr_src, 1, IS_USER(s));
3427
3428 addr_dest = AREG(insn, 9);
3429 tcg_gen_subi_i32(addr_dest, addr_dest, opsize_bytes(opsize));
3430 dest = gen_load(s, opsize, addr_dest, 1, IS_USER(s));
3431
3432 gen_addx(s, src, dest, opsize);
3433
3434 gen_store(s, opsize, addr_dest, QREG_CC_N, IS_USER(s));
3435
3436 tcg_temp_free(dest);
3437 tcg_temp_free(src);
3438 }
3439
3440 static inline void shift_im(DisasContext *s, uint16_t insn, int opsize)
3441 {
3442 int count = (insn >> 9) & 7;
3443 int logical = insn & 8;
3444 int left = insn & 0x100;
3445 int bits = opsize_bytes(opsize) * 8;
3446 TCGv reg = gen_extend(s, DREG(insn, 0), opsize, !logical);
3447
3448 if (count == 0) {
3449 count = 8;
3450 }
3451
3452 tcg_gen_movi_i32(QREG_CC_V, 0);
3453 if (left) {
3454 tcg_gen_shri_i32(QREG_CC_C, reg, bits - count);
3455 tcg_gen_shli_i32(QREG_CC_N, reg, count);
3456
3457 /*
3458 * Note that ColdFire always clears V (done above),
3459 * while M68000 sets if the most significant bit is changed at
3460 * any time during the shift operation.
3461 */
3462 if (!logical && m68k_feature(s->env, M68K_FEATURE_M68000)) {
3463 /* if shift count >= bits, V is (reg != 0) */
3464 if (count >= bits) {
3465 tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, reg, QREG_CC_V);
3466 } else {
3467 TCGv t0 = tcg_temp_new();
3468 tcg_gen_sari_i32(QREG_CC_V, reg, bits - 1);
3469 tcg_gen_sari_i32(t0, reg, bits - count - 1);
3470 tcg_gen_setcond_i32(TCG_COND_NE, QREG_CC_V, QREG_CC_V, t0);
3471 tcg_temp_free(t0);
3472 }
3473 tcg_gen_neg_i32(QREG_CC_V, QREG_CC_V);
3474 }
3475 } else {
3476 tcg_gen_shri_i32(QREG_CC_C, reg, count - 1);
3477 if (logical) {
3478 tcg_gen_shri_i32(QREG_CC_N, reg, count);
3479 } else {
3480 tcg_gen_sari_i32(QREG_CC_N, reg, count);
3481 }
3482 }
3483
3484 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
3485 tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
3486 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
3487 tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C);
3488
3489 gen_partset_reg(opsize, DREG(insn, 0), QREG_CC_N);
3490 set_cc_op(s, CC_OP_FLAGS);
3491 }
3492
3493 static inline void shift_reg(DisasContext *s, uint16_t insn, int opsize)
3494 {
3495 int logical = insn & 8;
3496 int left = insn & 0x100;
3497 int bits = opsize_bytes(opsize) * 8;
3498 TCGv reg = gen_extend(s, DREG(insn, 0), opsize, !logical);
3499 TCGv s32;
3500 TCGv_i64 t64, s64;
3501
3502 t64 = tcg_temp_new_i64();
3503 s64 = tcg_temp_new_i64();
3504 s32 = tcg_temp_new();
3505
3506 /*
3507 * Note that m68k truncates the shift count modulo 64, not 32.
3508 * In addition, a 64-bit shift makes it easy to find "the last
3509 * bit shifted out", for the carry flag.
3510 */
3511 tcg_gen_andi_i32(s32, DREG(insn, 9), 63);
3512 tcg_gen_extu_i32_i64(s64, s32);
3513 tcg_gen_extu_i32_i64(t64, reg);
3514
3515 /* Optimistically set V=0. Also used as a zero source below. */
3516 tcg_gen_movi_i32(QREG_CC_V, 0);
3517 if (left) {
3518 tcg_gen_shl_i64(t64, t64, s64);
3519
3520 if (opsize == OS_LONG) {
3521 tcg_gen_extr_i64_i32(QREG_CC_N, QREG_CC_C, t64);
3522 /* Note that C=0 if shift count is 0, and we get that for free. */
3523 } else {
3524 TCGv zero = tcg_const_i32(0);
3525 tcg_gen_extrl_i64_i32(QREG_CC_N, t64);
3526 tcg_gen_shri_i32(QREG_CC_C, QREG_CC_N, bits);
3527 tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
3528 s32, zero, zero, QREG_CC_C);
3529 tcg_temp_free(zero);
3530 }
3531 tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
3532
3533 /* X = C, but only if the shift count was non-zero. */
3534 tcg_gen_movcond_i32(TCG_COND_NE, QREG_CC_X, s32, QREG_CC_V,
3535 QREG_CC_C, QREG_CC_X);
3536
3537 /*
3538 * M68000 sets V if the most significant bit is changed at
3539 * any time during the shift operation. Do this via creating
3540 * an extension of the sign bit, comparing, and discarding
3541 * the bits below the sign bit. I.e.
3542 * int64_t s = (intN_t)reg;
3543 * int64_t t = (int64_t)(intN_t)reg << count;
3544 * V = ((s ^ t) & (-1 << (bits - 1))) != 0
3545 */
3546 if (!logical && m68k_feature(s->env, M68K_FEATURE_M68000)) {
3547 TCGv_i64 tt = tcg_const_i64(32);
3548 /* if shift is greater than 32, use 32 */
3549 tcg_gen_movcond_i64(TCG_COND_GT, s64, s64, tt, tt, s64);
3550 tcg_temp_free_i64(tt);
3551 /* Sign extend the input to 64 bits; re-do the shift. */
3552 tcg_gen_ext_i32_i64(t64, reg);
3553 tcg_gen_shl_i64(s64, t64, s64);
3554 /* Clear all bits that are unchanged. */
3555 tcg_gen_xor_i64(t64, t64, s64);
3556 /* Ignore the bits below the sign bit. */
3557 tcg_gen_andi_i64(t64, t64, -1ULL << (bits - 1));
3558 /* If any bits remain set, we have overflow. */
3559 tcg_gen_setcondi_i64(TCG_COND_NE, t64, t64, 0);
3560 tcg_gen_extrl_i64_i32(QREG_CC_V, t64);
3561 tcg_gen_neg_i32(QREG_CC_V, QREG_CC_V);
3562 }
3563 } else {
3564 tcg_gen_shli_i64(t64, t64, 32);
3565 if (logical) {
3566 tcg_gen_shr_i64(t64, t64, s64);
3567 } else {
3568 tcg_gen_sar_i64(t64, t64, s64);
3569 }
3570 tcg_gen_extr_i64_i32(QREG_CC_C, QREG_CC_N, t64);
3571
3572 /* Note that C=0 if shift count is 0, and we get that for free. */
3573 tcg_gen_shri_i32(QREG_CC_C, QREG_CC_C, 31);
3574
3575 /* X = C, but only if the shift count was non-zero. */
3576 tcg_gen_movcond_i32(TCG_COND_NE, QREG_CC_X, s32, QREG_CC_V,
3577 QREG_CC_C, QREG_CC_X);
3578 }
3579 gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
3580 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
3581
3582 tcg_temp_free(s32);
3583 tcg_temp_free_i64(s64);
3584 tcg_temp_free_i64(t64);
3585
3586 /* Write back the result. */
3587 gen_partset_reg(opsize, DREG(insn, 0), QREG_CC_N);
3588 set_cc_op(s, CC_OP_FLAGS);
3589 }
3590
3591 DISAS_INSN(shift8_im)
3592 {
3593 shift_im(s, insn, OS_BYTE);
3594 }
3595
3596 DISAS_INSN(shift16_im)
3597 {
3598 shift_im(s, insn, OS_WORD);
3599 }
3600
3601 DISAS_INSN(shift_im)
3602 {
3603 shift_im(s, insn, OS_LONG);
3604 }
3605
3606 DISAS_INSN(shift8_reg)
3607 {
3608 shift_reg(s, insn, OS_BYTE);
3609 }
3610
3611 DISAS_INSN(shift16_reg)
3612 {
3613 shift_reg(s, insn, OS_WORD);
3614 }
3615
3616 DISAS_INSN(shift_reg)
3617 {
3618 shift_reg(s, insn, OS_LONG);
3619 }
3620
3621 DISAS_INSN(shift_mem)
3622 {
3623 int logical = insn & 8;
3624 int left = insn & 0x100;
3625 TCGv src;
3626 TCGv addr;
3627
3628 SRC_EA(env, src, OS_WORD, !logical, &addr);
3629 tcg_gen_movi_i32(QREG_CC_V, 0);
3630 if (left) {
3631 tcg_gen_shri_i32(QREG_CC_C, src, 15);
3632 tcg_gen_shli_i32(QREG_CC_N, src, 1);
3633
3634 /*
3635 * Note that ColdFire always clears V,
3636 * while M68000 sets if the most significant bit is changed at
3637 * any time during the shift operation
3638 */
3639 if (!logical && m68k_feature(s->env, M68K_FEATURE_M68000)) {
3640 src = gen_extend(s, src, OS_WORD, 1);
3641 tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, src);
3642 }
3643 } else {
3644 tcg_gen_mov_i32(QREG_CC_C, src);
3645 if (logical) {
3646 tcg_gen_shri_i32(QREG_CC_N, src, 1);
3647 } else {
3648 tcg_gen_sari_i32(QREG_CC_N, src, 1);
3649 }
3650 }
3651
3652 gen_ext(QREG_CC_N, QREG_CC_N, OS_WORD, 1);
3653 tcg_gen_andi_i32(QREG_CC_C, QREG_CC_C, 1);
3654 tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
3655 tcg_gen_mov_i32(QREG_CC_X, QREG_CC_C);
3656
3657 DEST_EA(env, insn, OS_WORD, QREG_CC_N, &addr);
3658 set_cc_op(s, CC_OP_FLAGS);
3659 }
3660
3661 static void rotate(TCGv reg, TCGv shift, int left, int size)
3662 {
3663 switch (size) {
3664 case 8:
3665 /* Replicate the 8-bit input so that a 32-bit rotate works. */
3666 tcg_gen_ext8u_i32(reg, reg);
3667 tcg_gen_muli_i32(reg, reg, 0x01010101);
3668 goto do_long;
3669 case 16:
3670 /* Replicate the 16-bit input so that a 32-bit rotate works. */
3671 tcg_gen_deposit_i32(reg, reg, reg, 16, 16);
3672 goto do_long;
3673 do_long:
3674 default:
3675 if (left) {
3676 tcg_gen_rotl_i32(reg, reg, shift);
3677 } else {
3678 tcg_gen_rotr_i32(reg, reg, shift);
3679 }
3680 }
3681
3682 /* compute flags */
3683
3684 switch (size) {
3685 case 8:
3686 tcg_gen_ext8s_i32(reg, reg);
3687 break;
3688 case 16:
3689 tcg_gen_ext16s_i32(reg, reg);
3690 break;
3691 default:
3692 break;
3693 }
3694
3695 /* QREG_CC_X is not affected */
3696
3697 tcg_gen_mov_i32(QREG_CC_N, reg);
3698 tcg_gen_mov_i32(QREG_CC_Z, reg);
3699
3700 if (left) {
3701 tcg_gen_andi_i32(QREG_CC_C, reg, 1);
3702 } else {
3703 tcg_gen_shri_i32(QREG_CC_C, reg, 31);
3704 }
3705
3706 tcg_gen_movi_i32(QREG_CC_V, 0); /* always cleared */
3707 }
3708
3709 static void rotate_x_flags(TCGv reg, TCGv X, int size)
3710 {
3711 switch (size) {
3712 case 8:
3713 tcg_gen_ext8s_i32(reg, reg);
3714 break;
3715 case 16:
3716 tcg_gen_ext16s_i32(reg, reg);
3717 break;
3718 default:
3719 break;
3720 }
3721 tcg_gen_mov_i32(QREG_CC_N, reg);
3722 tcg_gen_mov_i32(QREG_CC_Z, reg);
3723 tcg_gen_mov_i32(QREG_CC_X, X);
3724 tcg_gen_mov_i32(QREG_CC_C, X);
3725 tcg_gen_movi_i32(QREG_CC_V, 0);
3726 }
3727
3728 /* Result of rotate_x() is valid if 0 <= shift <= size */
3729 static TCGv rotate_x(TCGv reg, TCGv shift, int left, int size)
3730 {
3731 TCGv X, shl, shr, shx, sz, zero;
3732
3733 sz = tcg_const_i32(size);
3734
3735 shr = tcg_temp_new();
3736 shl = tcg_temp_new();
3737 shx = tcg_temp_new();
3738 if (left) {
3739 tcg_gen_mov_i32(shl, shift); /* shl = shift */
3740 tcg_gen_movi_i32(shr, size + 1);
3741 tcg_gen_sub_i32(shr, shr, shift); /* shr = size + 1 - shift */
3742 tcg_gen_subi_i32(shx, shift, 1); /* shx = shift - 1 */
3743 /* shx = shx < 0 ? size : shx; */
3744 zero = tcg_const_i32(0);
3745 tcg_gen_movcond_i32(TCG_COND_LT, shx, shx, zero, sz, shx);
3746 tcg_temp_free(zero);
3747 } else {
3748 tcg_gen_mov_i32(shr, shift); /* shr = shift */
3749 tcg_gen_movi_i32(shl, size + 1);
3750 tcg_gen_sub_i32(shl, shl, shift); /* shl = size + 1 - shift */
3751 tcg_gen_sub_i32(shx, sz, shift); /* shx = size - shift */
3752 }
3753 tcg_temp_free_i32(sz);
3754
3755 /* reg = (reg << shl) | (reg >> shr) | (x << shx); */
3756
3757 tcg_gen_shl_i32(shl, reg, shl);
3758 tcg_gen_shr_i32(shr, reg, shr);
3759 tcg_gen_or_i32(reg, shl, shr);
3760 tcg_temp_free(shl);
3761 tcg_temp_free(shr);
3762 tcg_gen_shl_i32(shx, QREG_CC_X, shx);
3763 tcg_gen_or_i32(reg, reg, shx);
3764 tcg_temp_free(shx);
3765
3766 /* X = (reg >> size) & 1 */
3767
3768 X = tcg_temp_new();
3769 tcg_gen_extract_i32(X, reg, size, 1);
3770
3771 return X;
3772 }
3773
3774 /* Result of rotate32_x() is valid if 0 <= shift < 33 */
3775 static TCGv rotate32_x(TCGv reg, TCGv shift, int left)
3776 {
3777 TCGv_i64 t0, shift64;
3778 TCGv X, lo, hi, zero;
3779
3780 shift64 = tcg_temp_new_i64();
3781 tcg_gen_extu_i32_i64(shift64, shift);
3782
3783 t0 = tcg_temp_new_i64();
3784
3785 X = tcg_temp_new();
3786 lo = tcg_temp_new();
3787 hi = tcg_temp_new();
3788
3789 if (left) {
3790 /* create [reg:X:..] */
3791
3792 tcg_gen_shli_i32(lo, QREG_CC_X, 31);
3793 tcg_gen_concat_i32_i64(t0, lo, reg);
3794
3795 /* rotate */
3796
3797 tcg_gen_rotl_i64(t0, t0, shift64);
3798 tcg_temp_free_i64(shift64);
3799
3800 /* result is [reg:..:reg:X] */
3801
3802 tcg_gen_extr_i64_i32(lo, hi, t0);
3803 tcg_gen_andi_i32(X, lo, 1);
3804
3805 tcg_gen_shri_i32(lo, lo, 1);
3806 } else {
3807 /* create [..:X:reg] */
3808
3809 tcg_gen_concat_i32_i64(t0, reg, QREG_CC_X);
3810
3811 tcg_gen_rotr_i64(t0, t0, shift64);
3812 tcg_temp_free_i64(shift64);
3813
3814 /* result is value: [X:reg:..:reg] */
3815
3816 tcg_gen_extr_i64_i32(lo, hi, t0);
3817
3818 /* extract X */
3819
3820 tcg_gen_shri_i32(X, hi, 31);
3821
3822 /* extract result */
3823
3824 tcg_gen_shli_i32(hi, hi, 1);
3825 }
3826 tcg_temp_free_i64(t0);
3827 tcg_gen_or_i32(lo, lo, hi);
3828 tcg_temp_free(hi);
3829
3830 /* if shift == 0, register and X are not affected */
3831
3832 zero = tcg_const_i32(0);
3833 tcg_gen_movcond_i32(TCG_COND_EQ, X, shift, zero, QREG_CC_X, X);
3834 tcg_gen_movcond_i32(TCG_COND_EQ, reg, shift, zero, reg, lo);
3835 tcg_temp_free(zero);
3836 tcg_temp_free(lo);
3837
3838 return X;
3839 }
3840
3841 DISAS_INSN(rotate_im)
3842 {
3843 TCGv shift;
3844 int tmp;
3845 int left = (insn & 0x100);
3846
3847 tmp = (insn >> 9) & 7;
3848 if (tmp == 0) {
3849 tmp = 8;
3850 }
3851
3852 shift = tcg_const_i32(tmp);
3853 if (insn & 8) {
3854 rotate(DREG(insn, 0), shift, left, 32);
3855 } else {
3856 TCGv X = rotate32_x(DREG(insn, 0), shift, left);
3857 rotate_x_flags(DREG(insn, 0), X, 32);
3858 tcg_temp_free(X);
3859 }
3860 tcg_temp_free(shift);
3861
3862 set_cc_op(s, CC_OP_FLAGS);
3863 }
3864
3865 DISAS_INSN(rotate8_im)
3866 {
3867 int left = (insn & 0x100);
3868 TCGv reg;
3869 TCGv shift;
3870 int tmp;
3871
3872 reg = gen_extend(s, DREG(insn, 0), OS_BYTE, 0);
3873
3874 tmp = (insn >> 9) & 7;
3875 if (tmp == 0) {
3876 tmp = 8;
3877 }
3878
3879 shift = tcg_const_i32(tmp);
3880 if (insn & 8) {
3881 rotate(reg, shift, left, 8);
3882 } else {
3883 TCGv X = rotate_x(reg, shift, left, 8);
3884 rotate_x_flags(reg, X, 8);
3885 tcg_temp_free(X);
3886 }
3887 tcg_temp_free(shift);
3888 gen_partset_reg(OS_BYTE, DREG(insn, 0), reg);
3889 set_cc_op(s, CC_OP_FLAGS);
3890 }
3891
3892 DISAS_INSN(rotate16_im)
3893 {
3894 int left = (insn & 0x100);
3895 TCGv reg;
3896 TCGv shift;
3897 int tmp;
3898
3899 reg = gen_extend(s, DREG(insn, 0), OS_WORD, 0);
3900 tmp = (insn >> 9) & 7;
3901 if (tmp == 0) {
3902 tmp = 8;
3903 }
3904
3905 shift = tcg_const_i32(tmp);
3906 if (insn & 8) {
3907 rotate(reg, shift, left, 16);
3908 } else {
3909 TCGv X = rotate_x(reg, shift, left, 16);
3910 rotate_x_flags(reg, X, 16);
3911 tcg_temp_free(X);
3912 }
3913 tcg_temp_free(shift);
3914 gen_partset_reg(OS_WORD, DREG(insn, 0), reg);
3915 set_cc_op(s, CC_OP_FLAGS);
3916 }
3917
3918 DISAS_INSN(rotate_reg)
3919 {
3920 TCGv reg;
3921 TCGv src;
3922 TCGv t0, t1;
3923 int left = (insn & 0x100);
3924
3925 reg = DREG(insn, 0);
3926 src = DREG(insn, 9);
3927 /* shift in [0..63] */
3928 t0 = tcg_temp_new();
3929 tcg_gen_andi_i32(t0, src, 63);
3930 t1 = tcg_temp_new_i32();
3931 if (insn & 8) {
3932 tcg_gen_andi_i32(t1, src, 31);
3933 rotate(reg, t1, left, 32);
3934 /* if shift == 0, clear C */
3935 tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
3936 t0, QREG_CC_V /* 0 */,
3937 QREG_CC_V /* 0 */, QREG_CC_C);
3938 } else {
3939 TCGv X;
3940 /* modulo 33 */
3941 tcg_gen_movi_i32(t1, 33);
3942 tcg_gen_remu_i32(t1, t0, t1);
3943 X = rotate32_x(DREG(insn, 0), t1, left);
3944 rotate_x_flags(DREG(insn, 0), X, 32);
3945 tcg_temp_free(X);
3946 }
3947 tcg_temp_free(t1);
3948 tcg_temp_free(t0);
3949 set_cc_op(s, CC_OP_FLAGS);
3950 }
3951
3952 DISAS_INSN(rotate8_reg)
3953 {
3954 TCGv reg;
3955 TCGv src;
3956 TCGv t0, t1;
3957 int left = (insn & 0x100);
3958
3959 reg = gen_extend(s, DREG(insn, 0), OS_BYTE, 0);
3960 src = DREG(insn, 9);
3961 /* shift in [0..63] */
3962 t0 = tcg_temp_new_i32();
3963 tcg_gen_andi_i32(t0, src, 63);
3964 t1 = tcg_temp_new_i32();
3965 if (insn & 8) {
3966 tcg_gen_andi_i32(t1, src, 7);
3967 rotate(reg, t1, left, 8);
3968 /* if shift == 0, clear C */
3969 tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
3970 t0, QREG_CC_V /* 0 */,
3971 QREG_CC_V /* 0 */, QREG_CC_C);
3972 } else {
3973 TCGv X;
3974 /* modulo 9 */
3975 tcg_gen_movi_i32(t1, 9);
3976 tcg_gen_remu_i32(t1, t0, t1);
3977 X = rotate_x(reg, t1, left, 8);
3978 rotate_x_flags(reg, X, 8);
3979 tcg_temp_free(X);
3980 }
3981 tcg_temp_free(t1);
3982 tcg_temp_free(t0);
3983 gen_partset_reg(OS_BYTE, DREG(insn, 0), reg);
3984 set_cc_op(s, CC_OP_FLAGS);
3985 }
3986
3987 DISAS_INSN(rotate16_reg)
3988 {
3989 TCGv reg;
3990 TCGv src;
3991 TCGv t0, t1;
3992 int left = (insn & 0x100);
3993
3994 reg = gen_extend(s, DREG(insn, 0), OS_WORD, 0);
3995 src = DREG(insn, 9);
3996 /* shift in [0..63] */
3997 t0 = tcg_temp_new_i32();
3998 tcg_gen_andi_i32(t0, src, 63);
3999 t1 = tcg_temp_new_i32();
4000 if (insn & 8) {
4001 tcg_gen_andi_i32(t1, src, 15);
4002 rotate(reg, t1, left, 16);
4003 /* if shift == 0, clear C */
4004 tcg_gen_movcond_i32(TCG_COND_EQ, QREG_CC_C,
4005 t0, QREG_CC_V /* 0 */,
4006 QREG_CC_V /* 0 */, QREG_CC_C);
4007 } else {
4008 TCGv X;
4009 /* modulo 17 */
4010 tcg_gen_movi_i32(t1, 17);
4011 tcg_gen_remu_i32(t1, t0, t1);
4012 X = rotate_x(reg, t1, left, 16);
4013 rotate_x_flags(reg, X, 16);
4014 tcg_temp_free(X);
4015 }
4016 tcg_temp_free(t1);
4017 tcg_temp_free(t0);
4018 gen_partset_reg(OS_WORD, DREG(insn, 0), reg);
4019 set_cc_op(s, CC_OP_FLAGS);
4020 }
4021
4022 DISAS_INSN(rotate_mem)
4023 {
4024 TCGv src;
4025 TCGv addr;
4026 TCGv shift;
4027 int left = (insn & 0x100);
4028
4029 SRC_EA(env, src, OS_WORD, 0, &addr);
4030
4031 shift = tcg_const_i32(1);
4032 if (insn & 0x0200) {
4033 rotate(src, shift, left, 16);
4034 } else {
4035 TCGv X = rotate_x(src, shift, left, 16);
4036 rotate_x_flags(src, X, 16);
4037 tcg_temp_free(X);
4038 }
4039 tcg_temp_free(shift);
4040 DEST_EA(env, insn, OS_WORD, src, &addr);
4041 set_cc_op(s, CC_OP_FLAGS);
4042 }
4043
4044 DISAS_INSN(bfext_reg)
4045 {
4046 int ext = read_im16(env, s);
4047 int is_sign = insn & 0x200;
4048 TCGv src = DREG(insn, 0);
4049 TCGv dst = DREG(ext, 12);
4050 int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
4051 int ofs = extract32(ext, 6, 5); /* big bit-endian */
4052 int pos = 32 - ofs - len; /* little bit-endian */
4053 TCGv tmp = tcg_temp_new();
4054 TCGv shift;
4055
4056 /*
4057 * In general, we're going to rotate the field so that it's at the
4058 * top of the word and then right-shift by the complement of the
4059 * width to extend the field.
4060 */
4061 if (ext & 0x20) {
4062 /* Variable width. */
4063 if (ext & 0x800) {
4064 /* Variable offset. */
4065 tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
4066 tcg_gen_rotl_i32(tmp, src, tmp);
4067 } else {
4068 tcg_gen_rotli_i32(tmp, src, ofs);
4069 }
4070
4071 shift = tcg_temp_new();
4072 tcg_gen_neg_i32(shift, DREG(ext, 0));
4073 tcg_gen_andi_i32(shift, shift, 31);
4074 tcg_gen_sar_i32(QREG_CC_N, tmp, shift);
4075 if (is_sign) {
4076 tcg_gen_mov_i32(dst, QREG_CC_N);
4077 } else {
4078 tcg_gen_shr_i32(dst, tmp, shift);
4079 }
4080 tcg_temp_free(shift);
4081 } else {
4082 /* Immediate width. */
4083 if (ext & 0x800) {
4084 /* Variable offset */
4085 tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
4086 tcg_gen_rotl_i32(tmp, src, tmp);
4087 src = tmp;
4088 pos = 32 - len;
4089 } else {
4090 /*
4091 * Immediate offset. If the field doesn't wrap around the
4092 * end of the word, rely on (s)extract completely.
4093 */
4094 if (pos < 0) {
4095 tcg_gen_rotli_i32(tmp, src, ofs);
4096 src = tmp;
4097 pos = 32 - len;
4098 }
4099 }
4100
4101 tcg_gen_sextract_i32(QREG_CC_N, src, pos, len);
4102 if (is_sign) {
4103 tcg_gen_mov_i32(dst, QREG_CC_N);
4104 } else {
4105 tcg_gen_extract_i32(dst, src, pos, len);
4106 }
4107 }
4108
4109 tcg_temp_free(tmp);
4110 set_cc_op(s, CC_OP_LOGIC);
4111 }
4112
4113 DISAS_INSN(bfext_mem)
4114 {
4115 int ext = read_im16(env, s);
4116 int is_sign = insn & 0x200;
4117 TCGv dest = DREG(ext, 12);
4118 TCGv addr, len, ofs;
4119
4120 addr = gen_lea(env, s, insn, OS_UNSIZED);
4121 if (IS_NULL_QREG(addr)) {
4122 gen_addr_fault(s);
4123 return;
4124 }
4125
4126 if (ext & 0x20) {
4127 len = DREG(ext, 0);
4128 } else {
4129 len = tcg_const_i32(extract32(ext, 0, 5));
4130 }
4131 if (ext & 0x800) {
4132 ofs = DREG(ext, 6);
4133 } else {
4134 ofs = tcg_const_i32(extract32(ext, 6, 5));
4135 }
4136
4137 if (is_sign) {
4138 gen_helper_bfexts_mem(dest, cpu_env, addr, ofs, len);
4139 tcg_gen_mov_i32(QREG_CC_N, dest);
4140 } else {
4141 TCGv_i64 tmp = tcg_temp_new_i64();
4142 gen_helper_bfextu_mem(tmp, cpu_env, addr, ofs, len);
4143 tcg_gen_extr_i64_i32(dest, QREG_CC_N, tmp);
4144 tcg_temp_free_i64(tmp);
4145 }
4146 set_cc_op(s, CC_OP_LOGIC);
4147
4148 if (!(ext & 0x20)) {
4149 tcg_temp_free(len);
4150 }
4151 if (!(ext & 0x800)) {
4152 tcg_temp_free(ofs);
4153 }
4154 }
4155
4156 DISAS_INSN(bfop_reg)
4157 {
4158 int ext = read_im16(env, s);
4159 TCGv src = DREG(insn, 0);
4160 int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
4161 int ofs = extract32(ext, 6, 5); /* big bit-endian */
4162 TCGv mask, tofs, tlen;
4163
4164 tofs = NULL;
4165 tlen = NULL;
4166 if ((insn & 0x0f00) == 0x0d00) { /* bfffo */
4167 tofs = tcg_temp_new();
4168 tlen = tcg_temp_new();
4169 }
4170
4171 if ((ext & 0x820) == 0) {
4172 /* Immediate width and offset. */
4173 uint32_t maski = 0x7fffffffu >> (len - 1);
4174 if (ofs + len <= 32) {
4175 tcg_gen_shli_i32(QREG_CC_N, src, ofs);
4176 } else {
4177 tcg_gen_rotli_i32(QREG_CC_N, src, ofs);
4178 }
4179 tcg_gen_andi_i32(QREG_CC_N, QREG_CC_N, ~maski);
4180 mask = tcg_const_i32(ror32(maski, ofs));
4181 if (tofs) {
4182 tcg_gen_movi_i32(tofs, ofs);
4183 tcg_gen_movi_i32(tlen, len);
4184 }
4185 } else {
4186 TCGv tmp = tcg_temp_new();
4187 if (ext & 0x20) {
4188 /* Variable width */
4189 tcg_gen_subi_i32(tmp, DREG(ext, 0), 1);
4190 tcg_gen_andi_i32(tmp, tmp, 31);
4191 mask = tcg_const_i32(0x7fffffffu);
4192 tcg_gen_shr_i32(mask, mask, tmp);
4193 if (tlen) {
4194 tcg_gen_addi_i32(tlen, tmp, 1);
4195 }
4196 } else {
4197 /* Immediate width */
4198 mask = tcg_const_i32(0x7fffffffu >> (len - 1));
4199 if (tlen) {
4200 tcg_gen_movi_i32(tlen, len);
4201 }
4202 }
4203 if (ext & 0x800) {
4204 /* Variable offset */
4205 tcg_gen_andi_i32(tmp, DREG(ext, 6), 31);
4206 tcg_gen_rotl_i32(QREG_CC_N, src, tmp);
4207 tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask);
4208 tcg_gen_rotr_i32(mask, mask, tmp);
4209 if (tofs) {
4210 tcg_gen_mov_i32(tofs, tmp);
4211 }
4212 } else {
4213 /* Immediate offset (and variable width) */
4214 tcg_gen_rotli_i32(QREG_CC_N, src, ofs);
4215 tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask);
4216 tcg_gen_rotri_i32(mask, mask, ofs);
4217 if (tofs) {
4218 tcg_gen_movi_i32(tofs, ofs);
4219 }
4220 }
4221 tcg_temp_free(tmp);
4222 }
4223 set_cc_op(s, CC_OP_LOGIC);
4224
4225 switch (insn & 0x0f00) {
4226 case 0x0a00: /* bfchg */
4227 tcg_gen_eqv_i32(src, src, mask);
4228 break;
4229 case 0x0c00: /* bfclr */
4230 tcg_gen_and_i32(src, src, mask);
4231 break;
4232 case 0x0d00: /* bfffo */
4233 gen_helper_bfffo_reg(DREG(ext, 12), QREG_CC_N, tofs, tlen);
4234 tcg_temp_free(tlen);
4235 tcg_temp_free(tofs);
4236 break;
4237 case 0x0e00: /* bfset */
4238 tcg_gen_orc_i32(src, src, mask);
4239 break;
4240 case 0x0800: /* bftst */
4241 /* flags already set; no other work to do. */
4242 break;
4243 default:
4244 g_assert_not_reached();
4245 }
4246 tcg_temp_free(mask);
4247 }
4248
4249 DISAS_INSN(bfop_mem)
4250 {
4251 int ext = read_im16(env, s);
4252 TCGv addr, len, ofs;
4253 TCGv_i64 t64;
4254
4255 addr = gen_lea(env, s, insn, OS_UNSIZED);
4256 if (IS_NULL_QREG(addr)) {
4257 gen_addr_fault(s);
4258 return;
4259 }
4260
4261 if (ext & 0x20) {
4262 len = DREG(ext, 0);
4263 } else {
4264 len = tcg_const_i32(extract32(ext, 0, 5));
4265 }
4266 if (ext & 0x800) {
4267 ofs = DREG(ext, 6);
4268 } else {
4269 ofs = tcg_const_i32(extract32(ext, 6, 5));
4270 }
4271
4272 switch (insn & 0x0f00) {
4273 case 0x0a00: /* bfchg */
4274 gen_helper_bfchg_mem(QREG_CC_N, cpu_env, addr, ofs, len);
4275 break;
4276 case 0x0c00: /* bfclr */
4277 gen_helper_bfclr_mem(QREG_CC_N, cpu_env, addr, ofs, len);
4278 break;
4279 case 0x0d00: /* bfffo */
4280 t64 = tcg_temp_new_i64();
4281 gen_helper_bfffo_mem(t64, cpu_env, addr, ofs, len);
4282 tcg_gen_extr_i64_i32(DREG(ext, 12), QREG_CC_N, t64);
4283 tcg_temp_free_i64(t64);
4284 break;
4285 case 0x0e00: /* bfset */
4286 gen_helper_bfset_mem(QREG_CC_N, cpu_env, addr, ofs, len);
4287 break;
4288 case 0x0800: /* bftst */
4289 gen_helper_bfexts_mem(QREG_CC_N, cpu_env, addr, ofs, len);
4290 break;
4291 default:
4292 g_assert_not_reached();
4293 }
4294 set_cc_op(s, CC_OP_LOGIC);
4295
4296 if (!(ext & 0x20)) {
4297 tcg_temp_free(len);
4298 }
4299 if (!(ext & 0x800)) {
4300 tcg_temp_free(ofs);
4301 }
4302 }
4303
4304 DISAS_INSN(bfins_reg)
4305 {
4306 int ext = read_im16(env, s);
4307 TCGv dst = DREG(insn, 0);
4308 TCGv src = DREG(ext, 12);
4309 int len = ((extract32(ext, 0, 5) - 1) & 31) + 1;
4310 int ofs = extract32(ext, 6, 5); /* big bit-endian */
4311 int pos = 32 - ofs - len; /* little bit-endian */
4312 TCGv tmp;
4313
4314 tmp = tcg_temp_new();
4315
4316 if (ext & 0x20) {
4317 /* Variable width */
4318 tcg_gen_neg_i32(tmp, DREG(ext, 0));
4319 tcg_gen_andi_i32(tmp, tmp, 31);
4320 tcg_gen_shl_i32(QREG_CC_N, src, tmp);
4321 } else {
4322 /* Immediate width */
4323 tcg_gen_shli_i32(QREG_CC_N, src, 32 - len);
4324 }
4325 set_cc_op(s, CC_OP_LOGIC);
4326
4327 /* Immediate width and offset */
4328 if ((ext & 0x820) == 0) {
4329 /* Check for suitability for deposit. */
4330 if (pos >= 0) {
4331 tcg_gen_deposit_i32(dst, dst, src, pos, len);
4332 } else {
4333 uint32_t maski = -2U << (len - 1);
4334 uint32_t roti = (ofs + len) & 31;
4335 tcg_gen_andi_i32(tmp, src, ~maski);
4336 tcg_gen_rotri_i32(tmp, tmp, roti);
4337 tcg_gen_andi_i32(dst, dst, ror32(maski, roti));
4338 tcg_gen_or_i32(dst, dst, tmp);
4339 }
4340 } else {
4341 TCGv mask = tcg_temp_new();
4342 TCGv rot = tcg_temp_new();
4343
4344 if (ext & 0x20) {
4345 /* Variable width */
4346 tcg_gen_subi_i32(rot, DREG(ext, 0), 1);
4347 tcg_gen_andi_i32(rot, rot, 31);
4348 tcg_gen_movi_i32(mask, -2);
4349 tcg_gen_shl_i32(mask, mask, rot);
4350 tcg_gen_mov_i32(rot, DREG(ext, 0));
4351 tcg_gen_andc_i32(tmp, src, mask);
4352 } else {
4353 /* Immediate width (variable offset) */
4354 uint32_t maski = -2U << (len - 1);
4355 tcg_gen_andi_i32(tmp, src, ~maski);
4356 tcg_gen_movi_i32(mask, maski);
4357 tcg_gen_movi_i32(rot, len & 31);
4358 }
4359 if (ext & 0x800) {
4360 /* Variable offset */
4361 tcg_gen_add_i32(rot, rot, DREG(ext, 6));
4362 } else {
4363 /* Immediate offset (variable width) */
4364 tcg_gen_addi_i32(rot, rot, ofs);
4365 }
4366 tcg_gen_andi_i32(rot, rot, 31);
4367 tcg_gen_rotr_i32(mask, mask, rot);
4368 tcg_gen_rotr_i32(tmp, tmp, rot);
4369 tcg_gen_and_i32(dst, dst, mask);
4370 tcg_gen_or_i32(dst, dst, tmp);
4371
4372 tcg_temp_free(rot);
4373 tcg_temp_free(mask);
4374 }
4375 tcg_temp_free(tmp);
4376 }
4377
4378 DISAS_INSN(bfins_mem)
4379 {
4380 int ext = read_im16(env, s);
4381 TCGv src = DREG(ext, 12);
4382 TCGv addr, len, ofs;
4383
4384 addr = gen_lea(env, s, insn, OS_UNSIZED);
4385 if (IS_NULL_QREG(addr)) {
4386 gen_addr_fault(s);
4387 return;
4388 }
4389
4390 if (ext & 0x20) {
4391 len = DREG(ext, 0);
4392 } else {
4393 len = tcg_const_i32(extract32(ext, 0, 5));
4394 }
4395 if (ext & 0x800) {
4396 ofs = DREG(ext, 6);
4397 } else {
4398 ofs = tcg_const_i32(extract32(ext, 6, 5));
4399 }
4400
4401 gen_helper_bfins_mem(QREG_CC_N, cpu_env, addr, src, ofs, len);
4402 set_cc_op(s, CC_OP_LOGIC);
4403
4404 if (!(ext & 0x20)) {
4405 tcg_temp_free(len);
4406 }
4407 if (!(ext & 0x800)) {
4408 tcg_temp_free(ofs);
4409 }
4410 }
4411
4412 DISAS_INSN(ff1)
4413 {
4414 TCGv reg;
4415 reg = DREG(insn, 0);
4416 gen_logic_cc(s, reg, OS_LONG);
4417 gen_helper_ff1(reg, reg);
4418 }
4419
4420 DISAS_INSN(chk)
4421 {
4422 TCGv src, reg;
4423 int opsize;
4424
4425 switch ((insn >> 7) & 3) {
4426 case 3:
4427 opsize = OS_WORD;
4428 break;
4429 case 2:
4430 if (m68k_feature(env, M68K_FEATURE_CHK2)) {
4431 opsize = OS_LONG;
4432 break;
4433 }
4434 /* fallthru */
4435 default:
4436 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
4437 return;
4438 }
4439 SRC_EA(env, src, opsize, 1, NULL);
4440 reg = gen_extend(s, DREG(insn, 9), opsize, 1);
4441
4442 gen_flush_flags(s);
4443 gen_helper_chk(cpu_env, reg, src);
4444 }
4445
4446 DISAS_INSN(chk2)
4447 {
4448 uint16_t ext;
4449 TCGv addr1, addr2, bound1, bound2, reg;
4450 int opsize;
4451
4452 switch ((insn >> 9) & 3) {
4453 case 0:
4454 opsize = OS_BYTE;
4455 break;
4456 case 1:
4457 opsize = OS_WORD;
4458 break;
4459 case 2:
4460 opsize = OS_LONG;
4461 break;
4462 default:
4463 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
4464 return;
4465 }
4466
4467 ext = read_im16(env, s);
4468 if ((ext & 0x0800) == 0) {
4469 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
4470 return;
4471 }
4472
4473 addr1 = gen_lea(env, s, insn, OS_UNSIZED);
4474 addr2 = tcg_temp_new();
4475 tcg_gen_addi_i32(addr2, addr1, opsize_bytes(opsize));
4476
4477 bound1 = gen_load(s, opsize, addr1, 1, IS_USER(s));
4478 tcg_temp_free(addr1);
4479 bound2 = gen_load(s, opsize, addr2, 1, IS_USER(s));
4480 tcg_temp_free(addr2);
4481
4482 reg = tcg_temp_new();
4483 if (ext & 0x8000) {
4484 tcg_gen_mov_i32(reg, AREG(ext, 12));
4485 } else {
4486 gen_ext(reg, DREG(ext, 12), opsize, 1);
4487 }
4488
4489 gen_flush_flags(s);
4490 gen_helper_chk2(cpu_env, reg, bound1, bound2);
4491 tcg_temp_free(reg);
4492 tcg_temp_free(bound1);
4493 tcg_temp_free(bound2);
4494 }
4495
4496 static void m68k_copy_line(TCGv dst, TCGv src, int index)
4497 {
4498 TCGv addr;
4499 TCGv_i64 t0, t1;
4500
4501 addr = tcg_temp_new();
4502
4503 t0 = tcg_temp_new_i64();
4504 t1 = tcg_temp_new_i64();
4505
4506 tcg_gen_andi_i32(addr, src, ~15);
4507 tcg_gen_qemu_ld64(t0, addr, index);
4508 tcg_gen_addi_i32(addr, addr, 8);
4509 tcg_gen_qemu_ld64(t1, addr, index);
4510
4511 tcg_gen_andi_i32(addr, dst, ~15);
4512 tcg_gen_qemu_st64(t0, addr, index);
4513 tcg_gen_addi_i32(addr, addr, 8);
4514 tcg_gen_qemu_st64(t1, addr, index);
4515
4516 tcg_temp_free_i64(t0);
4517 tcg_temp_free_i64(t1);
4518 tcg_temp_free(addr);
4519 }
4520
4521 DISAS_INSN(move16_reg)
4522 {
4523 int index = IS_USER(s);
4524 TCGv tmp;
4525 uint16_t ext;
4526
4527 ext = read_im16(env, s);
4528 if ((ext & (1 << 15)) == 0) {
4529 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
4530 }
4531
4532 m68k_copy_line(AREG(ext, 12), AREG(insn, 0), index);
4533
4534 /* Ax can be Ay, so save Ay before incrementing Ax */
4535 tmp = tcg_temp_new();
4536 tcg_gen_mov_i32(tmp, AREG(ext, 12));
4537 tcg_gen_addi_i32(AREG(insn, 0), AREG(insn, 0), 16);
4538 tcg_gen_addi_i32(AREG(ext, 12), tmp, 16);
4539 tcg_temp_free(tmp);
4540 }
4541
4542 DISAS_INSN(move16_mem)
4543 {
4544 int index = IS_USER(s);
4545 TCGv reg, addr;
4546
4547 reg = AREG(insn, 0);
4548 addr = tcg_const_i32(read_im32(env, s));
4549
4550 if ((insn >> 3) & 1) {
4551 /* MOVE16 (xxx).L, (Ay) */
4552 m68k_copy_line(reg, addr, index);
4553 } else {
4554 /* MOVE16 (Ay), (xxx).L */
4555 m68k_copy_line(addr, reg, index);
4556 }
4557
4558 tcg_temp_free(addr);
4559
4560 if (((insn >> 3) & 2) == 0) {
4561 /* (Ay)+ */
4562 tcg_gen_addi_i32(reg, reg, 16);
4563 }
4564 }
4565
4566 DISAS_INSN(strldsr)
4567 {
4568 uint16_t ext;
4569 uint32_t addr;
4570
4571 addr = s->pc - 2;
4572 ext = read_im16(env, s);
4573 if (ext != 0x46FC) {
4574 gen_exception(s, addr, EXCP_ILLEGAL);
4575 return;
4576 }
4577 ext = read_im16(env, s);
4578 if (IS_USER(s) || (ext & SR_S) == 0) {
4579 gen_exception(s, addr, EXCP_PRIVILEGE);
4580 return;
4581 }
4582 gen_push(s, gen_get_sr(s));
4583 gen_set_sr_im(s, ext, 0);
4584 }
4585
4586 DISAS_INSN(move_from_sr)
4587 {
4588 TCGv sr;
4589
4590 if (IS_USER(s) && !m68k_feature(env, M68K_FEATURE_M68000)) {
4591 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4592 return;
4593 }
4594 sr = gen_get_sr(s);
4595 DEST_EA(env, insn, OS_WORD, sr, NULL);
4596 }
4597
4598 #if defined(CONFIG_SOFTMMU)
4599 DISAS_INSN(moves)
4600 {
4601 int opsize;
4602 uint16_t ext;
4603 TCGv reg;
4604 TCGv addr;
4605 int extend;
4606
4607 if (IS_USER(s)) {
4608 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4609 return;
4610 }
4611
4612 ext = read_im16(env, s);
4613
4614 opsize = insn_opsize(insn);
4615
4616 if (ext & 0x8000) {
4617 /* address register */
4618 reg = AREG(ext, 12);
4619 extend = 1;
4620 } else {
4621 /* data register */
4622 reg = DREG(ext, 12);
4623 extend = 0;
4624 }
4625
4626 addr = gen_lea(env, s, insn, opsize);
4627 if (IS_NULL_QREG(addr)) {
4628 gen_addr_fault(s);
4629 return;
4630 }
4631
4632 if (ext & 0x0800) {
4633 /* from reg to ea */
4634 gen_store(s, opsize, addr, reg, DFC_INDEX(s));
4635 } else {
4636 /* from ea to reg */
4637 TCGv tmp = gen_load(s, opsize, addr, 0, SFC_INDEX(s));
4638 if (extend) {
4639 gen_ext(reg, tmp, opsize, 1);
4640 } else {
4641 gen_partset_reg(opsize, reg, tmp);
4642 }
4643 tcg_temp_free(tmp);
4644 }
4645 switch (extract32(insn, 3, 3)) {
4646 case 3: /* Indirect postincrement. */
4647 tcg_gen_addi_i32(AREG(insn, 0), addr,
4648 REG(insn, 0) == 7 && opsize == OS_BYTE
4649 ? 2
4650 : opsize_bytes(opsize));
4651 break;
4652 case 4: /* Indirect predecrememnt. */
4653 tcg_gen_mov_i32(AREG(insn, 0), addr);
4654 break;
4655 }
4656 }
4657
4658 DISAS_INSN(move_to_sr)
4659 {
4660 if (IS_USER(s)) {
4661 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4662 return;
4663 }
4664 gen_move_to_sr(env, s, insn, false);
4665 gen_exit_tb(s);
4666 }
4667
4668 DISAS_INSN(move_from_usp)
4669 {
4670 if (IS_USER(s)) {
4671 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4672 return;
4673 }
4674 tcg_gen_ld_i32(AREG(insn, 0), cpu_env,
4675 offsetof(CPUM68KState, sp[M68K_USP]));
4676 }
4677
4678 DISAS_INSN(move_to_usp)
4679 {
4680 if (IS_USER(s)) {
4681 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4682 return;
4683 }
4684 tcg_gen_st_i32(AREG(insn, 0), cpu_env,
4685 offsetof(CPUM68KState, sp[M68K_USP]));
4686 }
4687
4688 DISAS_INSN(halt)
4689 {
4690 if (IS_USER(s)) {
4691 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4692 return;
4693 }
4694
4695 gen_exception(s, s->pc, EXCP_HALT_INSN);
4696 }
4697
4698 DISAS_INSN(stop)
4699 {
4700 uint16_t ext;
4701
4702 if (IS_USER(s)) {
4703 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4704 return;
4705 }
4706
4707 ext = read_im16(env, s);
4708
4709 gen_set_sr_im(s, ext, 0);
4710 tcg_gen_movi_i32(cpu_halted, 1);
4711 gen_exception(s, s->pc, EXCP_HLT);
4712 }
4713
4714 DISAS_INSN(rte)
4715 {
4716 if (IS_USER(s)) {
4717 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4718 return;
4719 }
4720 gen_exception(s, s->base.pc_next, EXCP_RTE);
4721 }
4722
4723 DISAS_INSN(cf_movec)
4724 {
4725 uint16_t ext;
4726 TCGv reg;
4727
4728 if (IS_USER(s)) {
4729 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4730 return;
4731 }
4732
4733 ext = read_im16(env, s);
4734
4735 if (ext & 0x8000) {
4736 reg = AREG(ext, 12);
4737 } else {
4738 reg = DREG(ext, 12);
4739 }
4740 gen_helper_cf_movec_to(cpu_env, tcg_const_i32(ext & 0xfff), reg);
4741 gen_exit_tb(s);
4742 }
4743
4744 DISAS_INSN(m68k_movec)
4745 {
4746 uint16_t ext;
4747 TCGv reg;
4748
4749 if (IS_USER(s)) {
4750 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4751 return;
4752 }
4753
4754 ext = read_im16(env, s);
4755
4756 if (ext & 0x8000) {
4757 reg = AREG(ext, 12);
4758 } else {
4759 reg = DREG(ext, 12);
4760 }
4761 if (insn & 1) {
4762 gen_helper_m68k_movec_to(cpu_env, tcg_const_i32(ext & 0xfff), reg);
4763 } else {
4764 gen_helper_m68k_movec_from(reg, cpu_env, tcg_const_i32(ext & 0xfff));
4765 }
4766 gen_exit_tb(s);
4767 }
4768
4769 DISAS_INSN(intouch)
4770 {
4771 if (IS_USER(s)) {
4772 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4773 return;
4774 }
4775 /* ICache fetch. Implement as no-op. */
4776 }
4777
4778 DISAS_INSN(cpushl)
4779 {
4780 if (IS_USER(s)) {
4781 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4782 return;
4783 }
4784 /* Cache push/invalidate. Implement as no-op. */
4785 }
4786
4787 DISAS_INSN(cpush)
4788 {
4789 if (IS_USER(s)) {
4790 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4791 return;
4792 }
4793 /* Cache push/invalidate. Implement as no-op. */
4794 }
4795
4796 DISAS_INSN(cinv)
4797 {
4798 if (IS_USER(s)) {
4799 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4800 return;
4801 }
4802 /* Invalidate cache line. Implement as no-op. */
4803 }
4804
4805 #if defined(CONFIG_SOFTMMU)
4806 DISAS_INSN(pflush)
4807 {
4808 TCGv opmode;
4809
4810 if (IS_USER(s)) {
4811 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4812 return;
4813 }
4814
4815 opmode = tcg_const_i32((insn >> 3) & 3);
4816 gen_helper_pflush(cpu_env, AREG(insn, 0), opmode);
4817 tcg_temp_free(opmode);
4818 }
4819
4820 DISAS_INSN(ptest)
4821 {
4822 TCGv is_read;
4823
4824 if (IS_USER(s)) {
4825 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4826 return;
4827 }
4828 is_read = tcg_const_i32((insn >> 5) & 1);
4829 gen_helper_ptest(cpu_env, AREG(insn, 0), is_read);
4830 tcg_temp_free(is_read);
4831 }
4832 #endif
4833
4834 DISAS_INSN(wddata)
4835 {
4836 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4837 }
4838
4839 DISAS_INSN(wdebug)
4840 {
4841 if (IS_USER(s)) {
4842 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
4843 return;
4844 }
4845 /* TODO: Implement wdebug. */
4846 cpu_abort(env_cpu(env), "WDEBUG not implemented");
4847 }
4848 #endif
4849
4850 DISAS_INSN(trap)
4851 {
4852 gen_exception(s, s->base.pc_next, EXCP_TRAP0 + (insn & 0xf));
4853 }
4854
4855 static void gen_load_fcr(DisasContext *s, TCGv res, int reg)
4856 {
4857 switch (reg) {
4858 case M68K_FPIAR:
4859 tcg_gen_movi_i32(res, 0);
4860 break;
4861 case M68K_FPSR:
4862 tcg_gen_ld_i32(res, cpu_env, offsetof(CPUM68KState, fpsr));
4863 break;
4864 case M68K_FPCR:
4865 tcg_gen_ld_i32(res, cpu_env, offsetof(CPUM68KState, fpcr));
4866 break;
4867 }
4868 }
4869
4870 static void gen_store_fcr(DisasContext *s, TCGv val, int reg)
4871 {
4872 switch (reg) {
4873 case M68K_FPIAR:
4874 break;
4875 case M68K_FPSR:
4876 tcg_gen_st_i32(val, cpu_env, offsetof(CPUM68KState, fpsr));
4877 break;
4878 case M68K_FPCR:
4879 gen_helper_set_fpcr(cpu_env, val);
4880 break;
4881 }
4882 }
4883
4884 static void gen_qemu_store_fcr(DisasContext *s, TCGv addr, int reg)
4885 {
4886 int index = IS_USER(s);
4887 TCGv tmp;
4888
4889 tmp = tcg_temp_new();
4890 gen_load_fcr(s, tmp, reg);
4891 tcg_gen_qemu_st32(tmp, addr, index);
4892 tcg_temp_free(tmp);
4893 }
4894
4895 static void gen_qemu_load_fcr(DisasContext *s, TCGv addr, int reg)
4896 {
4897 int index = IS_USER(s);
4898 TCGv tmp;
4899
4900 tmp = tcg_temp_new();
4901 tcg_gen_qemu_ld32u(tmp, addr, index);
4902 gen_store_fcr(s, tmp, reg);
4903 tcg_temp_free(tmp);
4904 }
4905
4906
4907 static void gen_op_fmove_fcr(CPUM68KState *env, DisasContext *s,
4908 uint32_t insn, uint32_t ext)
4909 {
4910 int mask = (ext >> 10) & 7;
4911 int is_write = (ext >> 13) & 1;
4912 int mode = extract32(insn, 3, 3);
4913 int i;
4914 TCGv addr, tmp;
4915
4916 switch (mode) {
4917 case 0: /* Dn */
4918 if (mask != M68K_FPIAR && mask != M68K_FPSR && mask != M68K_FPCR) {
4919 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
4920 return;
4921 }
4922 if (is_write) {
4923 gen_load_fcr(s, DREG(insn, 0), mask);
4924 } else {
4925 gen_store_fcr(s, DREG(insn, 0), mask);
4926 }
4927 return;
4928 case 1: /* An, only with FPIAR */
4929 if (mask != M68K_FPIAR) {
4930 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
4931 return;
4932 }
4933 if (is_write) {
4934 gen_load_fcr(s, AREG(insn, 0), mask);
4935 } else {
4936 gen_store_fcr(s, AREG(insn, 0), mask);
4937 }
4938 return;
4939 case 7: /* Immediate */
4940 if (REG(insn, 0) == 4) {
4941 if (is_write ||
4942 (mask != M68K_FPIAR && mask != M68K_FPSR &&
4943 mask != M68K_FPCR)) {
4944 gen_exception(s, s->base.pc_next, EXCP_ILLEGAL);
4945 return;
4946 }
4947 tmp = tcg_const_i32(read_im32(env, s));
4948 gen_store_fcr(s, tmp, mask);
4949 tcg_temp_free(tmp);
4950 return;
4951 }
4952 break;
4953 default:
4954 break;
4955 }
4956
4957 tmp = gen_lea(env, s, insn, OS_LONG);
4958 if (IS_NULL_QREG(tmp)) {
4959 gen_addr_fault(s);
4960 return;
4961 }
4962
4963 addr = tcg_temp_new();
4964 tcg_gen_mov_i32(addr, tmp);
4965
4966 /*
4967 * mask:
4968 *
4969 * 0b100 Floating-Point Control Register
4970 * 0b010 Floating-Point Status Register
4971 * 0b001 Floating-Point Instruction Address Register
4972 *
4973 */
4974
4975 if (is_write && mode == 4) {
4976 for (i = 2; i >= 0; i--, mask >>= 1) {
4977 if (mask & 1) {
4978 gen_qemu_store_fcr(s, addr, 1 << i);
4979 if (mask != 1) {
4980 tcg_gen_subi_i32(addr, addr, opsize_bytes(OS_LONG));
4981 }
4982 }
4983 }
4984 tcg_gen_mov_i32(AREG(insn, 0), addr);
4985 } else {
4986 for (i = 0; i < 3; i++, mask >>= 1) {
4987 if (mask & 1) {
4988 if (is_write) {
4989 gen_qemu_store_fcr(s, addr, 1 << i);
4990 } else {
4991 gen_qemu_load_fcr(s, addr, 1 << i);
4992 }
4993 if (mask != 1 || mode == 3) {
4994 tcg_gen_addi_i32(addr, addr, opsize_bytes(OS_LONG));
4995 }
4996 }
4997 }
4998 if (mode == 3) {
4999 tcg_gen_mov_i32(AREG(insn, 0), addr);
5000 }
5001 }
5002 tcg_temp_free_i32(addr);
5003 }
5004
5005 static void gen_op_fmovem(CPUM68KState *env, DisasContext *s,
5006 uint32_t insn, uint32_t ext)
5007 {
5008 int opsize;
5009 TCGv addr, tmp;
5010 int mode = (ext >> 11) & 0x3;
5011 int is_load = ((ext & 0x2000) == 0);
5012
5013 if (m68k_feature(s->env, M68K_FEATURE_FPU)) {
5014 opsize = OS_EXTENDED;
5015 } else {
5016 opsize = OS_DOUBLE; /* FIXME */
5017 }
5018
5019 addr = gen_lea(env, s, insn, opsize);
5020 if (IS_NULL_QREG(addr)) {
5021 gen_addr_fault(s);
5022 return;
5023 }
5024
5025 tmp = tcg_temp_new();
5026 if (mode & 0x1) {
5027 /* Dynamic register list */
5028 tcg_gen_ext8u_i32(tmp, DREG(ext, 4));
5029 } else {
5030 /* Static register list */
5031 tcg_gen_movi_i32(tmp, ext & 0xff);
5032 }
5033
5034 if (!is_load && (mode & 2) == 0) {
5035 /*
5036 * predecrement addressing mode
5037 * only available to store register to memory
5038 */
5039 if (opsize == OS_EXTENDED) {
5040 gen_helper_fmovemx_st_predec(tmp, cpu_env, addr, tmp);
5041 } else {
5042 gen_helper_fmovemd_st_predec(tmp, cpu_env, addr, tmp);
5043 }
5044 } else {
5045 /* postincrement addressing mode */
5046 if (opsize == OS_EXTENDED) {
5047 if (is_load) {
5048 gen_helper_fmovemx_ld_postinc(tmp, cpu_env, addr, tmp);
5049 } else {
5050 gen_helper_fmovemx_st_postinc(tmp, cpu_env, addr, tmp);
5051 }
5052 } else {
5053 if (is_load) {
5054 gen_helper_fmovemd_ld_postinc(tmp, cpu_env, addr, tmp);
5055 } else {
5056 gen_helper_fmovemd_st_postinc(tmp, cpu_env, addr, tmp);
5057 }
5058 }
5059 }
5060 if ((insn & 070) == 030 || (insn & 070) == 040) {
5061 tcg_gen_mov_i32(AREG(insn, 0), tmp);
5062 }
5063 tcg_temp_free(tmp);
5064 }
5065
5066 /*
5067 * ??? FP exceptions are not implemented. Most exceptions are deferred until
5068 * immediately before the next FP instruction is executed.
5069 */
5070 DISAS_INSN(fpu)
5071 {
5072 uint16_t ext;
5073 int opmode;
5074 int opsize;
5075 TCGv_ptr cpu_src, cpu_dest;
5076
5077 ext = read_im16(env, s);
5078 opmode = ext & 0x7f;
5079 switch ((ext >> 13) & 7) {
5080 case 0:
5081 break;
5082 case 1:
5083 goto undef;
5084 case 2:
5085 if (insn == 0xf200 && (ext & 0xfc00) == 0x5c00) {
5086 /* fmovecr */
5087 TCGv rom_offset = tcg_const_i32(opmode);
5088 cpu_dest = gen_fp_ptr(REG(ext, 7));
5089 gen_helper_fconst(cpu_env, cpu_dest, rom_offset);
5090 tcg_temp_free_ptr(cpu_dest);
5091 tcg_temp_free(rom_offset);
5092 return;
5093 }
5094 break;
5095 case 3: /* fmove out */
5096 cpu_src = gen_fp_ptr(REG(ext, 7));
5097 opsize = ext_opsize(ext, 10);
5098 if (gen_ea_fp(env, s, insn, opsize, cpu_src,
5099 EA_STORE, IS_USER(s)) == -1) {
5100 gen_addr_fault(s);
5101 }
5102 gen_helper_ftst(cpu_env, cpu_src);
5103 tcg_temp_free_ptr(cpu_src);
5104 return;
5105 case 4: /* fmove to control register. */
5106 case 5: /* fmove from control register. */
5107 gen_op_fmove_fcr(env, s, insn, ext);
5108 return;
5109 case 6: /* fmovem */
5110 case 7:
5111 if ((ext & 0x1000) == 0 && !m68k_feature(s->env, M68K_FEATURE_FPU)) {
5112 goto undef;
5113 }
5114 gen_op_fmovem(env, s, insn, ext);
5115 return;
5116 }
5117 if (ext & (1 << 14)) {
5118 /* Source effective address. */
5119 opsize = ext_opsize(ext, 10);
5120 cpu_src = gen_fp_result_ptr();
5121 if (gen_ea_fp(env, s, insn, opsize, cpu_src,
5122 EA_LOADS, IS_USER(s)) == -1) {
5123 gen_addr_fault(s);
5124 return;
5125 }
5126 } else {
5127 /* Source register. */
5128 opsize = OS_EXTENDED;
5129 cpu_src = gen_fp_ptr(REG(ext, 10));
5130 }
5131 cpu_dest = gen_fp_ptr(REG(ext, 7));
5132 switch (opmode) {
5133 case 0: /* fmove */
5134 gen_fp_move(cpu_dest, cpu_src);
5135 break;
5136 case 0x40: /* fsmove */
5137 gen_helper_fsround(cpu_env, cpu_dest, cpu_src);
5138 break;
5139 case 0x44: /* fdmove */
5140 gen_helper_fdround(cpu_env, cpu_dest, cpu_src);
5141 break;
5142 case 1: /* fint */
5143 gen_helper_firound(cpu_env, cpu_dest, cpu_src);
5144 break;
5145 case 2: /* fsinh */
5146 gen_helper_fsinh(cpu_env, cpu_dest, cpu_src);
5147 break;
5148 case 3: /* fintrz */
5149 gen_helper_fitrunc(cpu_env, cpu_dest, cpu_src);
5150 break;
5151 case 4: /* fsqrt */
5152 gen_helper_fsqrt(cpu_env, cpu_dest, cpu_src);
5153 break;
5154 case 0x41: /* fssqrt */
5155 gen_helper_fssqrt(cpu_env, cpu_dest, cpu_src);
5156 break;
5157 case 0x45: /* fdsqrt */
5158 gen_helper_fdsqrt(cpu_env, cpu_dest, cpu_src);
5159 break;
5160 case 0x06: /* flognp1 */
5161 gen_helper_flognp1(cpu_env, cpu_dest, cpu_src);
5162 break;
5163 case 0x08: /* fetoxm1 */
5164 gen_helper_fetoxm1(cpu_env, cpu_dest, cpu_src);
5165 break;
5166 case 0x09: /* ftanh */
5167 gen_helper_ftanh(cpu_env, cpu_dest, cpu_src);
5168 break;
5169 case 0x0a: /* fatan */
5170 gen_helper_fatan(cpu_env, cpu_dest, cpu_src);
5171 break;
5172 case 0x0c: /* fasin */
5173 gen_helper_fasin(cpu_env, cpu_dest, cpu_src);
5174 break;
5175 case 0x0d: /* fatanh */
5176 gen_helper_fatanh(cpu_env, cpu_dest, cpu_src);
5177 break;
5178 case 0x0e: /* fsin */
5179 gen_helper_fsin(cpu_env, cpu_dest, cpu_src);
5180 break;
5181 case 0x0f: /* ftan */
5182 gen_helper_ftan(cpu_env, cpu_dest, cpu_src);
5183 break;
5184 case 0x10: /* fetox */
5185 gen_helper_fetox(cpu_env, cpu_dest, cpu_src);
5186 break;
5187 case 0x11: /* ftwotox */
5188 gen_helper_ftwotox(cpu_env, cpu_dest, cpu_src);
5189 break;
5190 case 0x12: /* ftentox */
5191 gen_helper_ftentox(cpu_env, cpu_dest, cpu_src);
5192 break;
5193 case 0x14: /* flogn */
5194 gen_helper_flogn(cpu_env, cpu_dest, cpu_src);
5195 break;
5196 case 0x15: /* flog10 */
5197 gen_helper_flog10(cpu_env, cpu_dest, cpu_src);
5198 break;
5199 case 0x16: /* flog2 */
5200 gen_helper_flog2(cpu_env, cpu_dest, cpu_src);
5201 break;
5202 case 0x18: /* fabs */
5203 gen_helper_fabs(cpu_env, cpu_dest, cpu_src);
5204 break;
5205 case 0x58: /* fsabs */
5206 gen_helper_fsabs(cpu_env, cpu_dest, cpu_src);
5207 break;
5208 case 0x5c: /* fdabs */
5209 gen_helper_fdabs(cpu_env, cpu_dest, cpu_src);
5210 break;
5211 case 0x19: /* fcosh */
5212 gen_helper_fcosh(cpu_env, cpu_dest, cpu_src);
5213 break;
5214 case 0x1a: /* fneg */
5215 gen_helper_fneg(cpu_env, cpu_dest, cpu_src);
5216 break;
5217 case 0x5a: /* fsneg */
5218 gen_helper_fsneg(cpu_env, cpu_dest, cpu_src);
5219 break;
5220 case 0x5e: /* fdneg */
5221 gen_helper_fdneg(cpu_env, cpu_dest, cpu_src);
5222 break;
5223 case 0x1c: /* facos */
5224 gen_helper_facos(cpu_env, cpu_dest, cpu_src);
5225 break;
5226 case 0x1d: /* fcos */
5227 gen_helper_fcos(cpu_env, cpu_dest, cpu_src);
5228 break;
5229 case 0x1e: /* fgetexp */
5230 gen_helper_fgetexp(cpu_env, cpu_dest, cpu_src);
5231 break;
5232 case 0x1f: /* fgetman */
5233 gen_helper_fgetman(cpu_env, cpu_dest, cpu_src);
5234 break;
5235 case 0x20: /* fdiv */
5236 gen_helper_fdiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
5237 break;
5238 case 0x60: /* fsdiv */
5239 gen_helper_fsdiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
5240 break;
5241 case 0x64: /* fddiv */
5242 gen_helper_fddiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
5243 break;
5244 case 0x21: /* fmod */
5245 gen_helper_fmod(cpu_env, cpu_dest, cpu_src, cpu_dest);
5246 break;
5247 case 0x22: /* fadd */
5248 gen_helper_fadd(cpu_env, cpu_dest, cpu_src, cpu_dest);
5249 break;
5250 case 0x62: /* fsadd */
5251 gen_helper_fsadd(cpu_env, cpu_dest, cpu_src, cpu_dest);
5252 break;
5253 case 0x66: /* fdadd */
5254 gen_helper_fdadd(cpu_env, cpu_dest, cpu_src, cpu_dest);
5255 break;
5256 case 0x23: /* fmul */
5257 gen_helper_fmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
5258 break;
5259 case 0x63: /* fsmul */
5260 gen_helper_fsmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
5261 break;
5262 case 0x67: /* fdmul */
5263 gen_helper_fdmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
5264 break;
5265 case 0x24: /* fsgldiv */
5266 gen_helper_fsgldiv(cpu_env, cpu_dest, cpu_src, cpu_dest);
5267 break;
5268 case 0x25: /* frem */
5269 gen_helper_frem(cpu_env, cpu_dest, cpu_src, cpu_dest);
5270 break;
5271 case 0x26: /* fscale */
5272 gen_helper_fscale(cpu_env, cpu_dest, cpu_src, cpu_dest);
5273 break;
5274 case 0x27: /* fsglmul */
5275 gen_helper_fsglmul(cpu_env, cpu_dest, cpu_src, cpu_dest);
5276 break;
5277 case 0x28: /* fsub */
5278 gen_helper_fsub(cpu_env, cpu_dest, cpu_src, cpu_dest);
5279 break;
5280 case 0x68: /* fssub */
5281 gen_helper_fssub(cpu_env, cpu_dest, cpu_src, cpu_dest);
5282 break;
5283 case 0x6c: /* fdsub */
5284 gen_helper_fdsub(cpu_env, cpu_dest, cpu_src, cpu_dest);
5285 break;
5286 case 0x30: case 0x31: case 0x32:
5287 case 0x33: case 0x34: case 0x35:
5288 case 0x36: case 0x37: {
5289 TCGv_ptr cpu_dest2 = gen_fp_ptr(REG(ext, 0));
5290 gen_helper_fsincos(cpu_env, cpu_dest, cpu_dest2, cpu_src);
5291 tcg_temp_free_ptr(cpu_dest2);
5292 }
5293 break;
5294 case 0x38: /* fcmp */
5295 gen_helper_fcmp(cpu_env, cpu_src, cpu_dest);
5296 return;
5297 case 0x3a: /* ftst */
5298 gen_helper_ftst(cpu_env, cpu_src);
5299 return;
5300 default:
5301 goto undef;
5302 }
5303 tcg_temp_free_ptr(cpu_src);
5304 gen_helper_ftst(cpu_env, cpu_dest);
5305 tcg_temp_free_ptr(cpu_dest);
5306 return;
5307 undef:
5308 /* FIXME: Is this right for offset addressing modes? */
5309 s->pc -= 2;
5310 disas_undef_fpu(env, s, insn);
5311 }
5312
5313 static void gen_fcc_cond(DisasCompare *c, DisasContext *s, int cond)
5314 {
5315 TCGv fpsr;
5316
5317 c->g1 = 1;
5318 c->v2 = tcg_const_i32(0);
5319 c->g2 = 0;
5320 /* TODO: Raise BSUN exception. */
5321 fpsr = tcg_temp_new();
5322 gen_load_fcr(s, fpsr, M68K_FPSR);
5323 switch (cond) {
5324 case 0: /* False */
5325 case 16: /* Signaling False */
5326 c->v1 = c->v2;
5327 c->tcond = TCG_COND_NEVER;
5328 break;
5329 case 1: /* EQual Z */
5330 case 17: /* Signaling EQual Z */
5331 c->v1 = tcg_temp_new();
5332 c->g1 = 0;
5333 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z);
5334 c->tcond = TCG_COND_NE;
5335 break;
5336 case 2: /* Ordered Greater Than !(A || Z || N) */
5337 case 18: /* Greater Than !(A || Z || N) */
5338 c->v1 = tcg_temp_new();
5339 c->g1 = 0;
5340 tcg_gen_andi_i32(c->v1, fpsr,
5341 FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N);
5342 c->tcond = TCG_COND_EQ;
5343 break;
5344 case 3: /* Ordered Greater than or Equal Z || !(A || N) */
5345 case 19: /* Greater than or Equal Z || !(A || N) */
5346 c->v1 = tcg_temp_new();
5347 c->g1 = 0;
5348 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A);
5349 tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_A));
5350 tcg_gen_andi_i32(fpsr, fpsr, FPSR_CC_Z | FPSR_CC_N);
5351 tcg_gen_or_i32(c->v1, c->v1, fpsr);
5352 tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N);
5353 c->tcond = TCG_COND_NE;
5354 break;
5355 case 4: /* Ordered Less Than !(!N || A || Z); */
5356 case 20: /* Less Than !(!N || A || Z); */
5357 c->v1 = tcg_temp_new();
5358 c->g1 = 0;
5359 tcg_gen_xori_i32(c->v1, fpsr, FPSR_CC_N);
5360 tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_N | FPSR_CC_A | FPSR_CC_Z);
5361 c->tcond = TCG_COND_EQ;
5362 break;
5363 case 5: /* Ordered Less than or Equal Z || (N && !A) */
5364 case 21: /* Less than or Equal Z || (N && !A) */
5365 c->v1 = tcg_temp_new();
5366 c->g1 = 0;
5367 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A);
5368 tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_A));
5369 tcg_gen_andc_i32(c->v1, fpsr, c->v1);
5370 tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_Z | FPSR_CC_N);
5371 c->tcond = TCG_COND_NE;
5372 break;
5373 case 6: /* Ordered Greater or Less than !(A || Z) */
5374 case 22: /* Greater or Less than !(A || Z) */
5375 c->v1 = tcg_temp_new();
5376 c->g1 = 0;
5377 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z);
5378 c->tcond = TCG_COND_EQ;
5379 break;
5380 case 7: /* Ordered !A */
5381 case 23: /* Greater, Less or Equal !A */
5382 c->v1 = tcg_temp_new();
5383 c->g1 = 0;
5384 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A);
5385 c->tcond = TCG_COND_EQ;
5386 break;
5387 case 8: /* Unordered A */
5388 case 24: /* Not Greater, Less or Equal A */
5389 c->v1 = tcg_temp_new();
5390 c->g1 = 0;
5391 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A);
5392 c->tcond = TCG_COND_NE;
5393 break;
5394 case 9: /* Unordered or Equal A || Z */
5395 case 25: /* Not Greater or Less then A || Z */
5396 c->v1 = tcg_temp_new();
5397 c->g1 = 0;
5398 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z);
5399 c->tcond = TCG_COND_NE;
5400 break;
5401 case 10: /* Unordered or Greater Than A || !(N || Z)) */
5402 case 26: /* Not Less or Equal A || !(N || Z)) */
5403 c->v1 = tcg_temp_new();
5404 c->g1 = 0;
5405 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z);
5406 tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_Z));
5407 tcg_gen_andi_i32(fpsr, fpsr, FPSR_CC_A | FPSR_CC_N);
5408 tcg_gen_or_i32(c->v1, c->v1, fpsr);
5409 tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N);
5410 c->tcond = TCG_COND_NE;
5411 break;
5412 case 11: /* Unordered or Greater or Equal A || Z || !N */
5413 case 27: /* Not Less Than A || Z || !N */
5414 c->v1 = tcg_temp_new();
5415 c->g1 = 0;
5416 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N);
5417 tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N);
5418 c->tcond = TCG_COND_NE;
5419 break;
5420 case 12: /* Unordered or Less Than A || (N && !Z) */
5421 case 28: /* Not Greater than or Equal A || (N && !Z) */
5422 c->v1 = tcg_temp_new();
5423 c->g1 = 0;
5424 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z);
5425 tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_Z));
5426 tcg_gen_andc_i32(c->v1, fpsr, c->v1);
5427 tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_A | FPSR_CC_N);
5428 c->tcond = TCG_COND_NE;
5429 break;
5430 case 13: /* Unordered or Less or Equal A || Z || N */
5431 case 29: /* Not Greater Than A || Z || N */
5432 c->v1 = tcg_temp_new();
5433 c->g1 = 0;
5434 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N);
5435 c->tcond = TCG_COND_NE;
5436 break;
5437 case 14: /* Not Equal !Z */
5438 case 30: /* Signaling Not Equal !Z */
5439 c->v1 = tcg_temp_new();
5440 c->g1 = 0;
5441 tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z);
5442 c->tcond = TCG_COND_EQ;
5443 break;
5444 case 15: /* True */
5445 case 31: /* Signaling True */
5446 c->v1 = c->v2;
5447 c->tcond = TCG_COND_ALWAYS;
5448 break;
5449 }
5450 tcg_temp_free(fpsr);
5451 }
5452
5453 static void gen_fjmpcc(DisasContext *s, int cond, TCGLabel *l1)
5454 {
5455 DisasCompare c;
5456
5457 gen_fcc_cond(&c, s, cond);
5458 update_cc_op(s);
5459 tcg_gen_brcond_i32(c.tcond, c.v1, c.v2, l1);
5460 free_cond(&c);
5461 }
5462
5463 DISAS_INSN(fbcc)
5464 {
5465 uint32_t offset;
5466 uint32_t base;
5467 TCGLabel *l1;
5468
5469 base = s->pc;
5470 offset = (int16_t)read_im16(env, s);
5471 if (insn & (1 << 6)) {
5472 offset = (offset << 16) | read_im16(env, s);
5473 }
5474
5475 l1 = gen_new_label();
5476 update_cc_op(s);
5477 gen_fjmpcc(s, insn & 0x3f, l1);
5478 gen_jmp_tb(s, 0, s->pc);
5479 gen_set_label(l1);
5480 gen_jmp_tb(s, 1, base + offset);
5481 }
5482
5483 DISAS_INSN(fscc)
5484 {
5485 DisasCompare c;
5486 int cond;
5487 TCGv tmp;
5488 uint16_t ext;
5489
5490 ext = read_im16(env, s);
5491 cond = ext & 0x3f;
5492 gen_fcc_cond(&c, s, cond);
5493
5494 tmp = tcg_temp_new();
5495 tcg_gen_setcond_i32(c.tcond, tmp, c.v1, c.v2);
5496 free_cond(&c);
5497
5498 tcg_gen_neg_i32(tmp, tmp);
5499 DEST_EA(env, insn, OS_BYTE, tmp, NULL);
5500 tcg_temp_free(tmp);
5501 }
5502
5503 #if defined(CONFIG_SOFTMMU)
5504 DISAS_INSN(frestore)
5505 {
5506 TCGv addr;
5507
5508 if (IS_USER(s)) {
5509 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
5510 return;
5511 }
5512 if (m68k_feature(s->env, M68K_FEATURE_M68040)) {
5513 SRC_EA(env, addr, OS_LONG, 0, NULL);
5514 /* FIXME: check the state frame */
5515 } else {
5516 disas_undef(env, s, insn);
5517 }
5518 }
5519
5520 DISAS_INSN(fsave)
5521 {
5522 if (IS_USER(s)) {
5523 gen_exception(s, s->base.pc_next, EXCP_PRIVILEGE);
5524 return;
5525 }
5526
5527 if (m68k_feature(s->env, M68K_FEATURE_M68040)) {
5528 /* always write IDLE */
5529 TCGv idle = tcg_const_i32(0x41000000);
5530 DEST_EA(env, insn, OS_LONG, idle, NULL);
5531 tcg_temp_free(idle);
5532 } else {
5533 disas_undef(env, s, insn);
5534 }
5535 }
5536 #endif
5537
5538 static inline TCGv gen_mac_extract_word(DisasContext *s, TCGv val, int upper)
5539 {
5540 TCGv tmp = tcg_temp_new();
5541 if (s->env->macsr & MACSR_FI) {
5542 if (upper)
5543 tcg_gen_andi_i32(tmp, val, 0xffff0000);
5544 else
5545 tcg_gen_shli_i32(tmp, val, 16);
5546 } else if (s->env->macsr & MACSR_SU) {
5547 if (upper)
5548 tcg_gen_sari_i32(tmp, val, 16);
5549 else
5550 tcg_gen_ext16s_i32(tmp, val);
5551 } else {
5552 if (upper)
5553 tcg_gen_shri_i32(tmp, val, 16);
5554 else
5555 tcg_gen_ext16u_i32(tmp, val);
5556 }
5557 return tmp;
5558 }
5559
5560 static void gen_mac_clear_flags(void)
5561 {
5562 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR,
5563 ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV));
5564 }
5565
5566 DISAS_INSN(mac)
5567 {
5568 TCGv rx;
5569 TCGv ry;
5570 uint16_t ext;
5571 int acc;
5572 TCGv tmp;
5573 TCGv addr;
5574 TCGv loadval;
5575 int dual;
5576 TCGv saved_flags;
5577
5578 if (!s->done_mac) {
5579 s->mactmp = tcg_temp_new_i64();
5580 s->done_mac = 1;
5581 }
5582
5583 ext = read_im16(env, s);
5584
5585 acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
5586 dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
5587 if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) {
5588 disas_undef(env, s, insn);
5589 return;
5590 }
5591 if (insn & 0x30) {
5592 /* MAC with load. */
5593 tmp = gen_lea(env, s, insn, OS_LONG);
5594 addr = tcg_temp_new();
5595 tcg_gen_and_i32(addr, tmp, QREG_MAC_MASK);
5596 /*
5597 * Load the value now to ensure correct exception behavior.
5598 * Perform writeback after reading the MAC inputs.
5599 */
5600 loadval = gen_load(s, OS_LONG, addr, 0, IS_USER(s));
5601
5602 acc ^= 1;
5603 rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
5604 ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
5605 } else {
5606 loadval = addr = NULL_QREG;
5607 rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
5608 ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
5609 }
5610
5611 gen_mac_clear_flags();
5612 #if 0
5613 l1 = -1;
5614 /* Disabled because conditional branches clobber temporary vars. */
5615 if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
5616 /* Skip the multiply if we know we will ignore it. */
5617 l1 = gen_new_label();
5618 tmp = tcg_temp_new();
5619 tcg_gen_andi_i32(tmp, QREG_MACSR, 1 << (acc + 8));
5620 gen_op_jmp_nz32(tmp, l1);
5621 }
5622 #endif
5623
5624 if ((ext & 0x0800) == 0) {
5625 /* Word. */
5626 rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
5627 ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
5628 }
5629 if (s->env->macsr & MACSR_FI) {
5630 gen_helper_macmulf(s->mactmp, cpu_env, rx, ry);
5631 } else {
5632 if (s->env->macsr & MACSR_SU)
5633 gen_helper_macmuls(s->mactmp, cpu_env, rx, ry);
5634 else
5635 gen_helper_macmulu(s->mactmp, cpu_env, rx, ry);
5636 switch ((ext >> 9) & 3) {
5637 case 1:
5638 tcg_gen_shli_i64(s->mactmp, s->mactmp, 1);
5639 break;
5640 case 3:
5641 tcg_gen_shri_i64(s->mactmp, s->mactmp, 1);
5642 break;
5643 }
5644 }
5645
5646 if (dual) {
5647 /* Save the overflow flag from the multiply. */
5648 saved_flags = tcg_temp_new();
5649 tcg_gen_mov_i32(saved_flags, QREG_MACSR);
5650 } else {
5651 saved_flags = NULL_QREG;
5652 }
5653
5654 #if 0
5655 /* Disabled because conditional branches clobber temporary vars. */
5656 if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
5657 /* Skip the accumulate if the value is already saturated. */
5658 l1 = gen_new_label();
5659 tmp = tcg_temp_new();
5660 gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
5661 gen_op_jmp_nz32(tmp, l1);
5662 }
5663 #endif
5664
5665 if (insn & 0x100)
5666 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
5667 else
5668 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
5669
5670 if (s->env->macsr & MACSR_FI)
5671 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
5672 else if (s->env->macsr & MACSR_SU)
5673 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
5674 else
5675 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
5676
5677 #if 0
5678 /* Disabled because conditional branches clobber temporary vars. */
5679 if (l1 != -1)
5680 gen_set_label(l1);
5681 #endif
5682
5683 if (dual) {
5684 /* Dual accumulate variant. */
5685 acc = (ext >> 2) & 3;
5686 /* Restore the overflow flag from the multiplier. */
5687 tcg_gen_mov_i32(QREG_MACSR, saved_flags);
5688 #if 0
5689 /* Disabled because conditional branches clobber temporary vars. */
5690 if ((s->env->macsr & MACSR_OMC) != 0) {
5691 /* Skip the accumulate if the value is already saturated. */
5692 l1 = gen_new_label();
5693 tmp = tcg_temp_new();
5694 gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
5695 gen_op_jmp_nz32(tmp, l1);
5696 }
5697 #endif
5698 if (ext & 2)
5699 tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
5700 else
5701 tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
5702 if (s->env->macsr & MACSR_FI)
5703 gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
5704 else if (s->env->macsr & MACSR_SU)
5705 gen_helper_macsats(cpu_env, tcg_const_i32(acc));
5706 else
5707 gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
5708 #if 0
5709 /* Disabled because conditional branches clobber temporary vars. */
5710 if (l1 != -1)
5711 gen_set_label(l1);
5712 #endif
5713 }
5714 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(acc));
5715
5716 if (insn & 0x30) {
5717 TCGv rw;
5718 rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
5719 tcg_gen_mov_i32(rw, loadval);
5720 /*
5721 * FIXME: Should address writeback happen with the masked or
5722 * unmasked value?
5723 */
5724 switch ((insn >> 3) & 7) {
5725 case 3: /* Post-increment. */
5726 tcg_gen_addi_i32(AREG(insn, 0), addr, 4);
5727 break;
5728 case 4: /* Pre-decrement. */
5729 tcg_gen_mov_i32(AREG(insn, 0), addr);
5730 }
5731 tcg_temp_free(loadval);
5732 }
5733 }
5734
5735 DISAS_INSN(from_mac)
5736 {
5737 TCGv rx;
5738 TCGv_i64 acc;
5739 int accnum;
5740
5741 rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
5742 accnum = (insn >> 9) & 3;
5743 acc = MACREG(accnum);
5744 if (s->env->macsr & MACSR_FI) {
5745 gen_helper_get_macf(rx, cpu_env, acc);
5746 } else if ((s->env->macsr & MACSR_OMC) == 0) {
5747 tcg_gen_extrl_i64_i32(rx, acc);
5748 } else if (s->env->macsr & MACSR_SU) {
5749 gen_helper_get_macs(rx, acc);
5750 } else {
5751 gen_helper_get_macu(rx, acc);
5752 }
5753 if (insn & 0x40) {
5754 tcg_gen_movi_i64(acc, 0);
5755 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
5756 }
5757 }
5758
5759 DISAS_INSN(move_mac)
5760 {
5761 /* FIXME: This can be done without a helper. */
5762 int src;
5763 TCGv dest;
5764 src = insn & 3;
5765 dest = tcg_const_i32((insn >> 9) & 3);
5766 gen_helper_mac_move(cpu_env, dest, tcg_const_i32(src));
5767 gen_mac_clear_flags();
5768 gen_helper_mac_set_flags(cpu_env, dest);
5769 }
5770
5771 DISAS_INSN(from_macsr)
5772 {
5773 TCGv reg;
5774
5775 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
5776 tcg_gen_mov_i32(reg, QREG_MACSR);
5777 }
5778
5779 DISAS_INSN(from_mask)
5780 {
5781 TCGv reg;
5782 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
5783 tcg_gen_mov_i32(reg, QREG_MAC_MASK);
5784 }
5785
5786 DISAS_INSN(from_mext)
5787 {
5788 TCGv reg;
5789 TCGv acc;
5790 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
5791 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
5792 if (s->env->macsr & MACSR_FI)
5793 gen_helper_get_mac_extf(reg, cpu_env, acc);
5794 else
5795 gen_helper_get_mac_exti(reg, cpu_env, acc);
5796 }
5797
5798 DISAS_INSN(macsr_to_ccr)
5799 {
5800 TCGv tmp = tcg_temp_new();
5801 tcg_gen_andi_i32(tmp, QREG_MACSR, 0xf);
5802 gen_helper_set_sr(cpu_env, tmp);
5803 tcg_temp_free(tmp);
5804 set_cc_op(s, CC_OP_FLAGS);
5805 }
5806
5807 DISAS_INSN(to_mac)
5808 {
5809 TCGv_i64 acc;
5810 TCGv val;
5811 int accnum;
5812 accnum = (insn >> 9) & 3;
5813 acc = MACREG(accnum);
5814 SRC_EA(env, val, OS_LONG, 0, NULL);
5815 if (s->env->macsr & MACSR_FI) {
5816 tcg_gen_ext_i32_i64(acc, val);
5817 tcg_gen_shli_i64(acc, acc, 8);
5818 } else if (s->env->macsr & MACSR_SU) {
5819 tcg_gen_ext_i32_i64(acc, val);
5820 } else {
5821 tcg_gen_extu_i32_i64(acc, val);
5822 }
5823 tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
5824 gen_mac_clear_flags();
5825 gen_helper_mac_set_flags(cpu_env, tcg_const_i32(accnum));
5826 }
5827
5828 DISAS_INSN(to_macsr)
5829 {
5830 TCGv val;
5831 SRC_EA(env, val, OS_LONG, 0, NULL);
5832 gen_helper_set_macsr(cpu_env, val);
5833 gen_exit_tb(s);
5834 }
5835
5836 DISAS_INSN(to_mask)
5837 {
5838 TCGv val;
5839 SRC_EA(env, val, OS_LONG, 0, NULL);
5840 tcg_gen_ori_i32(QREG_MAC_MASK, val, 0xffff0000);
5841 }
5842
5843 DISAS_INSN(to_mext)
5844 {
5845 TCGv val;
5846 TCGv acc;
5847 SRC_EA(env, val, OS_LONG, 0, NULL);
5848 acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
5849 if (s->env->macsr & MACSR_FI)
5850 gen_helper_set_mac_extf(cpu_env, val, acc);
5851 else if (s->env->macsr & MACSR_SU)
5852 gen_helper_set_mac_exts(cpu_env, val, acc);
5853 else
5854 gen_helper_set_mac_extu(cpu_env, val, acc);
5855 }
5856
5857 static disas_proc opcode_table[65536];
5858
5859 static void
5860 register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
5861 {
5862 int i;
5863 int from;
5864 int to;
5865
5866 /* Sanity check. All set bits must be included in the mask. */
5867 if (opcode & ~mask) {
5868 fprintf(stderr,
5869 "qemu internal error: bogus opcode definition %04x/%04x\n",
5870 opcode, mask);
5871 abort();
5872 }
5873 /*
5874 * This could probably be cleverer. For now just optimize the case where
5875 * the top bits are known.
5876 */
5877 /* Find the first zero bit in the mask. */
5878 i = 0x8000;
5879 while ((i & mask) != 0)
5880 i >>= 1;
5881 /* Iterate over all combinations of this and lower bits. */
5882 if (i == 0)
5883 i = 1;
5884 else
5885 i <<= 1;
5886 from = opcode & ~(i - 1);
5887 to = from + i;
5888 for (i = from; i < to; i++) {
5889 if ((i & mask) == opcode)
5890 opcode_table[i] = proc;
5891 }
5892 }
5893
5894 /*
5895 * Register m68k opcode handlers. Order is important.
5896 * Later insn override earlier ones.
5897 */
5898 void register_m68k_insns (CPUM68KState *env)
5899 {
5900 /*
5901 * Build the opcode table only once to avoid
5902 * multithreading issues.
5903 */
5904 if (opcode_table[0] != NULL) {
5905 return;
5906 }
5907
5908 /*
5909 * use BASE() for instruction available
5910 * for CF_ISA_A and M68000.
5911 */
5912 #define BASE(name, opcode, mask) \
5913 register_opcode(disas_##name, 0x##opcode, 0x##mask)
5914 #define INSN(name, opcode, mask, feature) do { \
5915 if (m68k_feature(env, M68K_FEATURE_##feature)) \
5916 BASE(name, opcode, mask); \
5917 } while(0)
5918 BASE(undef, 0000, 0000);
5919 INSN(arith_im, 0080, fff8, CF_ISA_A);
5920 INSN(arith_im, 0000, ff00, M68000);
5921 INSN(chk2, 00c0, f9c0, CHK2);
5922 INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
5923 BASE(bitop_reg, 0100, f1c0);
5924 BASE(bitop_reg, 0140, f1c0);
5925 BASE(bitop_reg, 0180, f1c0);
5926 BASE(bitop_reg, 01c0, f1c0);
5927 INSN(movep, 0108, f138, MOVEP);
5928 INSN(arith_im, 0280, fff8, CF_ISA_A);
5929 INSN(arith_im, 0200, ff00, M68000);
5930 INSN(undef, 02c0, ffc0, M68000);
5931 INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
5932 INSN(arith_im, 0480, fff8, CF_ISA_A);
5933 INSN(arith_im, 0400, ff00, M68000);
5934 INSN(undef, 04c0, ffc0, M68000);
5935 INSN(arith_im, 0600, ff00, M68000);
5936 INSN(undef, 06c0, ffc0, M68000);
5937 INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
5938 INSN(arith_im, 0680, fff8, CF_ISA_A);
5939 INSN(arith_im, 0c00, ff38, CF_ISA_A);
5940 INSN(arith_im, 0c00, ff00, M68000);
5941 BASE(bitop_im, 0800, ffc0);
5942 BASE(bitop_im, 0840, ffc0);
5943 BASE(bitop_im, 0880, ffc0);
5944 BASE(bitop_im, 08c0, ffc0);
5945 INSN(arith_im, 0a80, fff8, CF_ISA_A);
5946 INSN(arith_im, 0a00, ff00, M68000);
5947 #if defined(CONFIG_SOFTMMU)
5948 INSN(moves, 0e00, ff00, M68000);
5949 #endif
5950 INSN(cas, 0ac0, ffc0, CAS);
5951 INSN(cas, 0cc0, ffc0, CAS);
5952 INSN(cas, 0ec0, ffc0, CAS);
5953 INSN(cas2w, 0cfc, ffff, CAS);
5954 INSN(cas2l, 0efc, ffff, CAS);
5955 BASE(move, 1000, f000);
5956 BASE(move, 2000, f000);
5957 BASE(move, 3000, f000);
5958 INSN(chk, 4000, f040, M68000);
5959 INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC);
5960 INSN(negx, 4080, fff8, CF_ISA_A);
5961 INSN(negx, 4000, ff00, M68000);
5962 INSN(undef, 40c0, ffc0, M68000);
5963 INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
5964 INSN(move_from_sr, 40c0, ffc0, M68000);
5965 BASE(lea, 41c0, f1c0);
5966 BASE(clr, 4200, ff00);
5967 BASE(undef, 42c0, ffc0);
5968 INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
5969 INSN(move_from_ccr, 42c0, ffc0, M68000);
5970 INSN(neg, 4480, fff8, CF_ISA_A);
5971 INSN(neg, 4400, ff00, M68000);
5972 INSN(undef, 44c0, ffc0, M68000);
5973 BASE(move_to_ccr, 44c0, ffc0);
5974 INSN(not, 4680, fff8, CF_ISA_A);
5975 INSN(not, 4600, ff00, M68000);
5976 #if defined(CONFIG_SOFTMMU)
5977 BASE(move_to_sr, 46c0, ffc0);
5978 #endif
5979 INSN(nbcd, 4800, ffc0, M68000);
5980 INSN(linkl, 4808, fff8, M68000);
5981 BASE(pea, 4840, ffc0);
5982 BASE(swap, 4840, fff8);
5983 INSN(bkpt, 4848, fff8, BKPT);
5984 INSN(movem, 48d0, fbf8, CF_ISA_A);
5985 INSN(movem, 48e8, fbf8, CF_ISA_A);
5986 INSN(movem, 4880, fb80, M68000);
5987 BASE(ext, 4880, fff8);
5988 BASE(ext, 48c0, fff8);
5989 BASE(ext, 49c0, fff8);
5990 BASE(tst, 4a00, ff00);
5991 INSN(tas, 4ac0, ffc0, CF_ISA_B);
5992 INSN(tas, 4ac0, ffc0, M68000);
5993 #if defined(CONFIG_SOFTMMU)
5994 INSN(halt, 4ac8, ffff, CF_ISA_A);
5995 #endif
5996 INSN(pulse, 4acc, ffff, CF_ISA_A);
5997 BASE(illegal, 4afc, ffff);
5998 INSN(mull, 4c00, ffc0, CF_ISA_A);
5999 INSN(mull, 4c00, ffc0, LONG_MULDIV);
6000 INSN(divl, 4c40, ffc0, CF_ISA_A);
6001 INSN(divl, 4c40, ffc0, LONG_MULDIV);
6002 INSN(sats, 4c80, fff8, CF_ISA_B);
6003 BASE(trap, 4e40, fff0);
6004 BASE(link, 4e50, fff8);
6005 BASE(unlk, 4e58, fff8);
6006 #if defined(CONFIG_SOFTMMU)
6007 INSN(move_to_usp, 4e60, fff8, USP);
6008 INSN(move_from_usp, 4e68, fff8, USP);
6009 INSN(reset, 4e70, ffff, M68000);
6010 BASE(stop, 4e72, ffff);
6011 BASE(rte, 4e73, ffff);
6012 INSN(cf_movec, 4e7b, ffff, CF_ISA_A);
6013 INSN(m68k_movec, 4e7a, fffe, M68000);
6014 #endif
6015 BASE(nop, 4e71, ffff);
6016 INSN(rtd, 4e74, ffff, RTD);
6017 BASE(rts, 4e75, ffff);
6018 BASE(jump, 4e80, ffc0);
6019 BASE(jump, 4ec0, ffc0);
6020 INSN(addsubq, 5000, f080, M68000);
6021 BASE(addsubq, 5080, f0c0);
6022 INSN(scc, 50c0, f0f8, CF_ISA_A); /* Scc.B Dx */
6023 INSN(scc, 50c0, f0c0, M68000); /* Scc.B <EA> */
6024 INSN(dbcc, 50c8, f0f8, M68000);
6025 INSN(tpf, 51f8, fff8, CF_ISA_A);
6026
6027 /* Branch instructions. */
6028 BASE(branch, 6000, f000);
6029 /* Disable long branch instructions, then add back the ones we want. */
6030 BASE(undef, 60ff, f0ff); /* All long branches. */
6031 INSN(branch, 60ff, f0ff, CF_ISA_B);
6032 INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */
6033 INSN(branch, 60ff, ffff, BRAL);
6034 INSN(branch, 60ff, f0ff, BCCL);
6035
6036 BASE(moveq, 7000, f100);
6037 INSN(mvzs, 7100, f100, CF_ISA_B);
6038 BASE(or, 8000, f000);
6039 BASE(divw, 80c0, f0c0);
6040 INSN(sbcd_reg, 8100, f1f8, M68000);
6041 INSN(sbcd_mem, 8108, f1f8, M68000);
6042 BASE(addsub, 9000, f000);
6043 INSN(undef, 90c0, f0c0, CF_ISA_A);
6044 INSN(subx_reg, 9180, f1f8, CF_ISA_A);
6045 INSN(subx_reg, 9100, f138, M68000);
6046 INSN(subx_mem, 9108, f138, M68000);
6047 INSN(suba, 91c0, f1c0, CF_ISA_A);
6048 INSN(suba, 90c0, f0c0, M68000);
6049
6050 BASE(undef_mac, a000, f000);
6051 INSN(mac, a000, f100, CF_EMAC);
6052 INSN(from_mac, a180, f9b0, CF_EMAC);
6053 INSN(move_mac, a110, f9fc, CF_EMAC);
6054 INSN(from_macsr,a980, f9f0, CF_EMAC);
6055 INSN(from_mask, ad80, fff0, CF_EMAC);
6056 INSN(from_mext, ab80, fbf0, CF_EMAC);
6057 INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
6058 INSN(to_mac, a100, f9c0, CF_EMAC);
6059 INSN(to_macsr, a900, ffc0, CF_EMAC);
6060 INSN(to_mext, ab00, fbc0, CF_EMAC);
6061 INSN(to_mask, ad00, ffc0, CF_EMAC);
6062
6063 INSN(mov3q, a140, f1c0, CF_ISA_B);
6064 INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
6065 INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
6066 INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
6067 INSN(cmp, b080, f1c0, CF_ISA_A);
6068 INSN(cmpa, b1c0, f1c0, CF_ISA_A);
6069 INSN(cmp, b000, f100, M68000);
6070 INSN(eor, b100, f100, M68000);
6071 INSN(cmpm, b108, f138, M68000);
6072 INSN(cmpa, b0c0, f0c0, M68000);
6073 INSN(eor, b180, f1c0, CF_ISA_A);
6074 BASE(and, c000, f000);
6075 INSN(exg_dd, c140, f1f8, M68000);
6076 INSN(exg_aa, c148, f1f8, M68000);
6077 INSN(exg_da, c188, f1f8, M68000);
6078 BASE(mulw, c0c0, f0c0);
6079 INSN(abcd_reg, c100, f1f8, M68000);
6080 INSN(abcd_mem, c108, f1f8, M68000);
6081 BASE(addsub, d000, f000);
6082 INSN(undef, d0c0, f0c0, CF_ISA_A);
6083 INSN(addx_reg, d180, f1f8, CF_ISA_A);
6084 INSN(addx_reg, d100, f138, M68000);
6085 INSN(addx_mem, d108, f138, M68000);
6086 INSN(adda, d1c0, f1c0, CF_ISA_A);
6087 INSN(adda, d0c0, f0c0, M68000);
6088 INSN(shift_im, e080, f0f0, CF_ISA_A);
6089 INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
6090 INSN(shift8_im, e000, f0f0, M68000);
6091 INSN(shift16_im, e040, f0f0, M68000);
6092 INSN(shift_im, e080, f0f0, M68000);
6093 INSN(shift8_reg, e020, f0f0, M68000);
6094 INSN(shift16_reg, e060, f0f0, M68000);
6095 INSN(shift_reg, e0a0, f0f0, M68000);
6096 INSN(shift_mem, e0c0, fcc0, M68000);
6097 INSN(rotate_im, e090, f0f0, M68000);
6098 INSN(rotate8_im, e010, f0f0, M68000);
6099 INSN(rotate16_im, e050, f0f0, M68000);
6100 INSN(rotate_reg, e0b0, f0f0, M68000);
6101 INSN(rotate8_reg, e030, f0f0, M68000);
6102 INSN(rotate16_reg, e070, f0f0, M68000);
6103 INSN(rotate_mem, e4c0, fcc0, M68000);
6104 INSN(bfext_mem, e9c0, fdc0, BITFIELD); /* bfextu & bfexts */
6105 INSN(bfext_reg, e9c0, fdf8, BITFIELD);
6106 INSN(bfins_mem, efc0, ffc0, BITFIELD);
6107 INSN(bfins_reg, efc0, fff8, BITFIELD);
6108 INSN(bfop_mem, eac0, ffc0, BITFIELD); /* bfchg */
6109 INSN(bfop_reg, eac0, fff8, BITFIELD); /* bfchg */
6110 INSN(bfop_mem, ecc0, ffc0, BITFIELD); /* bfclr */
6111 INSN(bfop_reg, ecc0, fff8, BITFIELD); /* bfclr */
6112 INSN(bfop_mem, edc0, ffc0, BITFIELD); /* bfffo */
6113 INSN(bfop_reg, edc0, fff8, BITFIELD); /* bfffo */
6114 INSN(bfop_mem, eec0, ffc0, BITFIELD); /* bfset */
6115 INSN(bfop_reg, eec0, fff8, BITFIELD); /* bfset */
6116 INSN(bfop_mem, e8c0, ffc0, BITFIELD); /* bftst */
6117 INSN(bfop_reg, e8c0, fff8, BITFIELD); /* bftst */
6118 BASE(undef_fpu, f000, f000);
6119 INSN(fpu, f200, ffc0, CF_FPU);
6120 INSN(fbcc, f280, ffc0, CF_FPU);
6121 INSN(fpu, f200, ffc0, FPU);
6122 INSN(fscc, f240, ffc0, FPU);
6123 INSN(fbcc, f280, ff80, FPU);
6124 #if defined(CONFIG_SOFTMMU)
6125 INSN(frestore, f340, ffc0, CF_FPU);
6126 INSN(fsave, f300, ffc0, CF_FPU);
6127 INSN(frestore, f340, ffc0, FPU);
6128 INSN(fsave, f300, ffc0, FPU);
6129 INSN(intouch, f340, ffc0, CF_ISA_A);
6130 INSN(cpushl, f428, ff38, CF_ISA_A);
6131 INSN(cpush, f420, ff20, M68040);
6132 INSN(cinv, f400, ff20, M68040);
6133 INSN(pflush, f500, ffe0, M68040);
6134 INSN(ptest, f548, ffd8, M68040);
6135 INSN(wddata, fb00, ff00, CF_ISA_A);
6136 INSN(wdebug, fbc0, ffc0, CF_ISA_A);
6137 #endif
6138 INSN(move16_mem, f600, ffe0, M68040);
6139 INSN(move16_reg, f620, fff8, M68040);
6140 #undef INSN
6141 }
6142
6143 static void m68k_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cpu)
6144 {
6145 DisasContext *dc = container_of(dcbase, DisasContext, base);
6146 CPUM68KState *env = cpu->env_ptr;
6147
6148 dc->env = env;
6149 dc->pc = dc->base.pc_first;
6150 dc->cc_op = CC_OP_DYNAMIC;
6151 dc->cc_op_synced = 1;
6152 dc->done_mac = 0;
6153 dc->writeback_mask = 0;
6154 init_release_array(dc);
6155 }
6156
6157 static void m68k_tr_tb_start(DisasContextBase *dcbase, CPUState *cpu)
6158 {
6159 }
6160
6161 static void m68k_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu)
6162 {
6163 DisasContext *dc = container_of(dcbase, DisasContext, base);
6164 tcg_gen_insn_start(dc->base.pc_next, dc->cc_op);
6165 }
6166
6167 static bool m68k_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu,
6168 const CPUBreakpoint *bp)
6169 {
6170 DisasContext *dc = container_of(dcbase, DisasContext, base);
6171
6172 gen_exception(dc, dc->base.pc_next, EXCP_DEBUG);
6173 /*
6174 * The address covered by the breakpoint must be included in
6175 * [tb->pc, tb->pc + tb->size) in order to for it to be
6176 * properly cleared -- thus we increment the PC here so that
6177 * the logic setting tb->size below does the right thing.
6178 */
6179 dc->base.pc_next += 2;
6180
6181 return true;
6182 }
6183
6184 static void m68k_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu)
6185 {
6186 DisasContext *dc = container_of(dcbase, DisasContext, base);
6187 CPUM68KState *env = cpu->env_ptr;
6188 uint16_t insn = read_im16(env, dc);
6189
6190 opcode_table[insn](env, dc, insn);
6191 do_writebacks(dc);
6192 do_release(dc);
6193
6194 dc->base.pc_next = dc->pc;
6195
6196 if (dc->base.is_jmp == DISAS_NEXT) {
6197 /*
6198 * Stop translation when the next insn might touch a new page.
6199 * This ensures that prefetch aborts at the right place.
6200 *
6201 * We cannot determine the size of the next insn without
6202 * completely decoding it. However, the maximum insn size
6203 * is 32 bytes, so end if we do not have that much remaining.
6204 * This may produce several small TBs at the end of each page,
6205 * but they will all be linked with goto_tb.
6206 *
6207 * ??? ColdFire maximum is 4 bytes; MC68000's maximum is also
6208 * smaller than MC68020's.
6209 */
6210 target_ulong start_page_offset
6211 = dc->pc - (dc->base.pc_first & TARGET_PAGE_MASK);
6212
6213 if (start_page_offset >= TARGET_PAGE_SIZE - 32) {
6214 dc->base.is_jmp = DISAS_TOO_MANY;
6215 }
6216 }
6217 }
6218
6219 static void m68k_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu)
6220 {
6221 DisasContext *dc = container_of(dcbase, DisasContext, base);
6222
6223 switch (dc->base.is_jmp) {
6224 case DISAS_NORETURN:
6225 break;
6226 case DISAS_TOO_MANY:
6227 update_cc_op(dc);
6228 if (dc->base.singlestep_enabled) {
6229 tcg_gen_movi_i32(QREG_PC, dc->pc);
6230 gen_raise_exception(EXCP_DEBUG);
6231 } else {
6232 gen_jmp_tb(dc, 0, dc->pc);
6233 }
6234 break;
6235 case DISAS_JUMP:
6236 /* We updated CC_OP and PC in gen_jmp/gen_jmp_im. */
6237 if (dc->base.singlestep_enabled) {
6238 gen_raise_exception(EXCP_DEBUG);
6239 } else {
6240 tcg_gen_lookup_and_goto_ptr();
6241 }
6242 break;
6243 case DISAS_EXIT:
6244 /*
6245 * We updated CC_OP and PC in gen_exit_tb, but also modified
6246 * other state that may require returning to the main loop.
6247 */
6248 if (dc->base.singlestep_enabled) {
6249 gen_raise_exception(EXCP_DEBUG);
6250 } else {
6251 tcg_gen_exit_tb(NULL, 0);
6252 }
6253 break;
6254 default:
6255 g_assert_not_reached();
6256 }
6257 }
6258
6259 static void m68k_tr_disas_log(const DisasContextBase *dcbase, CPUState *cpu)
6260 {
6261 qemu_log("IN: %s\n", lookup_symbol(dcbase->pc_first));
6262 log_target_disas(cpu, dcbase->pc_first, dcbase->tb->size);
6263 }
6264
6265 static const TranslatorOps m68k_tr_ops = {
6266 .init_disas_context = m68k_tr_init_disas_context,
6267 .tb_start = m68k_tr_tb_start,
6268 .insn_start = m68k_tr_insn_start,
6269 .breakpoint_check = m68k_tr_breakpoint_check,
6270 .translate_insn = m68k_tr_translate_insn,
6271 .tb_stop = m68k_tr_tb_stop,
6272 .disas_log = m68k_tr_disas_log,
6273 };
6274
6275 void gen_intermediate_code(CPUState *cpu, TranslationBlock *tb, int max_insns)
6276 {
6277 DisasContext dc;
6278 translator_loop(&m68k_tr_ops, &dc.base, cpu, tb, max_insns);
6279 }
6280
6281 static double floatx80_to_double(CPUM68KState *env, uint16_t high, uint64_t low)
6282 {
6283 floatx80 a = { .high = high, .low = low };
6284 union {
6285 float64 f64;
6286 double d;
6287 } u;
6288
6289 u.f64 = floatx80_to_float64(a, &env->fp_status);
6290 return u.d;
6291 }
6292
6293 void m68k_cpu_dump_state(CPUState *cs, FILE *f, int flags)
6294 {
6295 M68kCPU *cpu = M68K_CPU(cs);
6296 CPUM68KState *env = &cpu->env;
6297 int i;
6298 uint16_t sr;
6299 for (i = 0; i < 8; i++) {
6300 qemu_fprintf(f, "D%d = %08x A%d = %08x "
6301 "F%d = %04x %016"PRIx64" (%12g)\n",
6302 i, env->dregs[i], i, env->aregs[i],
6303 i, env->fregs[i].l.upper, env->fregs[i].l.lower,
6304 floatx80_to_double(env, env->fregs[i].l.upper,
6305 env->fregs[i].l.lower));
6306 }
6307 qemu_fprintf(f, "PC = %08x ", env->pc);
6308 sr = env->sr | cpu_m68k_get_ccr(env);
6309 qemu_fprintf(f, "SR = %04x T:%x I:%x %c%c %c%c%c%c%c\n",
6310 sr, (sr & SR_T) >> SR_T_SHIFT, (sr & SR_I) >> SR_I_SHIFT,
6311 (sr & SR_S) ? 'S' : 'U', (sr & SR_M) ? '%' : 'I',
6312 (sr & CCF_X) ? 'X' : '-', (sr & CCF_N) ? 'N' : '-',
6313 (sr & CCF_Z) ? 'Z' : '-', (sr & CCF_V) ? 'V' : '-',
6314 (sr & CCF_C) ? 'C' : '-');
6315 qemu_fprintf(f, "FPSR = %08x %c%c%c%c ", env->fpsr,
6316 (env->fpsr & FPSR_CC_A) ? 'A' : '-',
6317 (env->fpsr & FPSR_CC_I) ? 'I' : '-',
6318 (env->fpsr & FPSR_CC_Z) ? 'Z' : '-',
6319 (env->fpsr & FPSR_CC_N) ? 'N' : '-');
6320 qemu_fprintf(f, "\n "
6321 "FPCR = %04x ", env->fpcr);
6322 switch (env->fpcr & FPCR_PREC_MASK) {
6323 case FPCR_PREC_X:
6324 qemu_fprintf(f, "X ");
6325 break;
6326 case FPCR_PREC_S:
6327 qemu_fprintf(f, "S ");
6328 break;
6329 case FPCR_PREC_D:
6330 qemu_fprintf(f, "D ");
6331 break;
6332 }
6333 switch (env->fpcr & FPCR_RND_MASK) {
6334 case FPCR_RND_N:
6335 qemu_fprintf(f, "RN ");
6336 break;
6337 case FPCR_RND_Z:
6338 qemu_fprintf(f, "RZ ");
6339 break;
6340 case FPCR_RND_M:
6341 qemu_fprintf(f, "RM ");
6342 break;
6343 case FPCR_RND_P:
6344 qemu_fprintf(f, "RP ");
6345 break;
6346 }
6347 qemu_fprintf(f, "\n");
6348 #ifdef CONFIG_SOFTMMU
6349 qemu_fprintf(f, "%sA7(MSP) = %08x %sA7(USP) = %08x %sA7(ISP) = %08x\n",
6350 env->current_sp == M68K_SSP ? "->" : " ", env->sp[M68K_SSP],
6351 env->current_sp == M68K_USP ? "->" : " ", env->sp[M68K_USP],
6352 env->current_sp == M68K_ISP ? "->" : " ", env->sp[M68K_ISP]);
6353 qemu_fprintf(f, "VBR = 0x%08x\n", env->vbr);
6354 qemu_fprintf(f, "SFC = %x DFC %x\n", env->sfc, env->dfc);
6355 qemu_fprintf(f, "SSW %08x TCR %08x URP %08x SRP %08x\n",
6356 env->mmu.ssw, env->mmu.tcr, env->mmu.urp, env->mmu.srp);
6357 qemu_fprintf(f, "DTTR0/1: %08x/%08x ITTR0/1: %08x/%08x\n",
6358 env->mmu.ttr[M68K_DTTR0], env->mmu.ttr[M68K_DTTR1],
6359 env->mmu.ttr[M68K_ITTR0], env->mmu.ttr[M68K_ITTR1]);
6360 qemu_fprintf(f, "MMUSR %08x, fault at %08x\n",
6361 env->mmu.mmusr, env->mmu.ar);
6362 #endif
6363 }
6364
6365 void restore_state_to_opc(CPUM68KState *env, TranslationBlock *tb,
6366 target_ulong *data)
6367 {
6368 int cc_op = data[1];
6369 env->pc = data[0];
6370 if (cc_op != CC_OP_DYNAMIC) {
6371 env->cc_op = cc_op;
6372 }
6373 }
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