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Merge remote-tracking branch 'qmp/queue/qmp' into staging
[qemu.git] / target-microblaze / translate.c
1 /*
2 * Xilinx MicroBlaze emulation for qemu: main translation routines.
3 *
4 * Copyright (c) 2009 Edgar E. Iglesias.
5 * Copyright (c) 2009-2012 PetaLogix Qld Pty Ltd.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * 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 "cpu.h"
22 #include "disas.h"
23 #include "tcg-op.h"
24 #include "helper.h"
25 #include "microblaze-decode.h"
26
27 #define GEN_HELPER 1
28 #include "helper.h"
29
30 #define SIM_COMPAT 0
31 #define DISAS_GNU 1
32 #define DISAS_MB 1
33 #if DISAS_MB && !SIM_COMPAT
34 # define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__)
35 #else
36 # define LOG_DIS(...) do { } while (0)
37 #endif
38
39 #define D(x)
40
41 #define EXTRACT_FIELD(src, start, end) \
42 (((src) >> start) & ((1 << (end - start + 1)) - 1))
43
44 static TCGv env_debug;
45 static TCGv_ptr cpu_env;
46 static TCGv cpu_R[32];
47 static TCGv cpu_SR[18];
48 static TCGv env_imm;
49 static TCGv env_btaken;
50 static TCGv env_btarget;
51 static TCGv env_iflags;
52
53 #include "gen-icount.h"
54
55 /* This is the state at translation time. */
56 typedef struct DisasContext {
57 CPUMBState *env;
58 target_ulong pc;
59
60 /* Decoder. */
61 int type_b;
62 uint32_t ir;
63 uint8_t opcode;
64 uint8_t rd, ra, rb;
65 uint16_t imm;
66
67 unsigned int cpustate_changed;
68 unsigned int delayed_branch;
69 unsigned int tb_flags, synced_flags; /* tb dependent flags. */
70 unsigned int clear_imm;
71 int is_jmp;
72
73 #define JMP_NOJMP 0
74 #define JMP_DIRECT 1
75 #define JMP_DIRECT_CC 2
76 #define JMP_INDIRECT 3
77 unsigned int jmp;
78 uint32_t jmp_pc;
79
80 int abort_at_next_insn;
81 int nr_nops;
82 struct TranslationBlock *tb;
83 int singlestep_enabled;
84 } DisasContext;
85
86 static const char *regnames[] =
87 {
88 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
89 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
90 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
91 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
92 };
93
94 static const char *special_regnames[] =
95 {
96 "rpc", "rmsr", "sr2", "sr3", "sr4", "sr5", "sr6", "sr7",
97 "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
98 "sr16", "sr17", "sr18"
99 };
100
101 /* Sign extend at translation time. */
102 static inline int sign_extend(unsigned int val, unsigned int width)
103 {
104 int sval;
105
106 /* LSL. */
107 val <<= 31 - width;
108 sval = val;
109 /* ASR. */
110 sval >>= 31 - width;
111 return sval;
112 }
113
114 static inline void t_sync_flags(DisasContext *dc)
115 {
116 /* Synch the tb dependent flags between translator and runtime. */
117 if (dc->tb_flags != dc->synced_flags) {
118 tcg_gen_movi_tl(env_iflags, dc->tb_flags);
119 dc->synced_flags = dc->tb_flags;
120 }
121 }
122
123 static inline void t_gen_raise_exception(DisasContext *dc, uint32_t index)
124 {
125 TCGv_i32 tmp = tcg_const_i32(index);
126
127 t_sync_flags(dc);
128 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
129 gen_helper_raise_exception(tmp);
130 tcg_temp_free_i32(tmp);
131 dc->is_jmp = DISAS_UPDATE;
132 }
133
134 static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
135 {
136 TranslationBlock *tb;
137 tb = dc->tb;
138 if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
139 tcg_gen_goto_tb(n);
140 tcg_gen_movi_tl(cpu_SR[SR_PC], dest);
141 tcg_gen_exit_tb((tcg_target_long)tb + n);
142 } else {
143 tcg_gen_movi_tl(cpu_SR[SR_PC], dest);
144 tcg_gen_exit_tb(0);
145 }
146 }
147
148 static void read_carry(DisasContext *dc, TCGv d)
149 {
150 tcg_gen_shri_tl(d, cpu_SR[SR_MSR], 31);
151 }
152
153 static void write_carry(DisasContext *dc, TCGv v)
154 {
155 TCGv t0 = tcg_temp_new();
156 tcg_gen_shli_tl(t0, v, 31);
157 tcg_gen_sari_tl(t0, t0, 31);
158 tcg_gen_andi_tl(t0, t0, (MSR_C | MSR_CC));
159 tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR],
160 ~(MSR_C | MSR_CC));
161 tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t0);
162 tcg_temp_free(t0);
163 }
164
165 static void write_carryi(DisasContext *dc, int carry)
166 {
167 TCGv t0 = tcg_temp_new();
168 tcg_gen_movi_tl(t0, carry ? 1 : 0);
169 write_carry(dc, t0);
170 tcg_temp_free(t0);
171 }
172
173 /* True if ALU operand b is a small immediate that may deserve
174 faster treatment. */
175 static inline int dec_alu_op_b_is_small_imm(DisasContext *dc)
176 {
177 /* Immediate insn without the imm prefix ? */
178 return dc->type_b && !(dc->tb_flags & IMM_FLAG);
179 }
180
181 static inline TCGv *dec_alu_op_b(DisasContext *dc)
182 {
183 if (dc->type_b) {
184 if (dc->tb_flags & IMM_FLAG)
185 tcg_gen_ori_tl(env_imm, env_imm, dc->imm);
186 else
187 tcg_gen_movi_tl(env_imm, (int32_t)((int16_t)dc->imm));
188 return &env_imm;
189 } else
190 return &cpu_R[dc->rb];
191 }
192
193 static void dec_add(DisasContext *dc)
194 {
195 unsigned int k, c;
196 TCGv cf;
197
198 k = dc->opcode & 4;
199 c = dc->opcode & 2;
200
201 LOG_DIS("add%s%s%s r%d r%d r%d\n",
202 dc->type_b ? "i" : "", k ? "k" : "", c ? "c" : "",
203 dc->rd, dc->ra, dc->rb);
204
205 /* Take care of the easy cases first. */
206 if (k) {
207 /* k - keep carry, no need to update MSR. */
208 /* If rd == r0, it's a nop. */
209 if (dc->rd) {
210 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
211
212 if (c) {
213 /* c - Add carry into the result. */
214 cf = tcg_temp_new();
215
216 read_carry(dc, cf);
217 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
218 tcg_temp_free(cf);
219 }
220 }
221 return;
222 }
223
224 /* From now on, we can assume k is zero. So we need to update MSR. */
225 /* Extract carry. */
226 cf = tcg_temp_new();
227 if (c) {
228 read_carry(dc, cf);
229 } else {
230 tcg_gen_movi_tl(cf, 0);
231 }
232
233 if (dc->rd) {
234 TCGv ncf = tcg_temp_new();
235 gen_helper_carry(ncf, cpu_R[dc->ra], *(dec_alu_op_b(dc)), cf);
236 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
237 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
238 write_carry(dc, ncf);
239 tcg_temp_free(ncf);
240 } else {
241 gen_helper_carry(cf, cpu_R[dc->ra], *(dec_alu_op_b(dc)), cf);
242 write_carry(dc, cf);
243 }
244 tcg_temp_free(cf);
245 }
246
247 static void dec_sub(DisasContext *dc)
248 {
249 unsigned int u, cmp, k, c;
250 TCGv cf, na;
251
252 u = dc->imm & 2;
253 k = dc->opcode & 4;
254 c = dc->opcode & 2;
255 cmp = (dc->imm & 1) && (!dc->type_b) && k;
256
257 if (cmp) {
258 LOG_DIS("cmp%s r%d, r%d ir=%x\n", u ? "u" : "", dc->rd, dc->ra, dc->ir);
259 if (dc->rd) {
260 if (u)
261 gen_helper_cmpu(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
262 else
263 gen_helper_cmp(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
264 }
265 return;
266 }
267
268 LOG_DIS("sub%s%s r%d, r%d r%d\n",
269 k ? "k" : "", c ? "c" : "", dc->rd, dc->ra, dc->rb);
270
271 /* Take care of the easy cases first. */
272 if (k) {
273 /* k - keep carry, no need to update MSR. */
274 /* If rd == r0, it's a nop. */
275 if (dc->rd) {
276 tcg_gen_sub_tl(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
277
278 if (c) {
279 /* c - Add carry into the result. */
280 cf = tcg_temp_new();
281
282 read_carry(dc, cf);
283 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
284 tcg_temp_free(cf);
285 }
286 }
287 return;
288 }
289
290 /* From now on, we can assume k is zero. So we need to update MSR. */
291 /* Extract carry. And complement a into na. */
292 cf = tcg_temp_new();
293 na = tcg_temp_new();
294 if (c) {
295 read_carry(dc, cf);
296 } else {
297 tcg_gen_movi_tl(cf, 1);
298 }
299
300 /* d = b + ~a + c. carry defaults to 1. */
301 tcg_gen_not_tl(na, cpu_R[dc->ra]);
302
303 if (dc->rd) {
304 TCGv ncf = tcg_temp_new();
305 gen_helper_carry(ncf, na, *(dec_alu_op_b(dc)), cf);
306 tcg_gen_add_tl(cpu_R[dc->rd], na, *(dec_alu_op_b(dc)));
307 tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf);
308 write_carry(dc, ncf);
309 tcg_temp_free(ncf);
310 } else {
311 gen_helper_carry(cf, na, *(dec_alu_op_b(dc)), cf);
312 write_carry(dc, cf);
313 }
314 tcg_temp_free(cf);
315 tcg_temp_free(na);
316 }
317
318 static void dec_pattern(DisasContext *dc)
319 {
320 unsigned int mode;
321 int l1;
322
323 if ((dc->tb_flags & MSR_EE_FLAG)
324 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
325 && !((dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR))) {
326 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
327 t_gen_raise_exception(dc, EXCP_HW_EXCP);
328 }
329
330 mode = dc->opcode & 3;
331 switch (mode) {
332 case 0:
333 /* pcmpbf. */
334 LOG_DIS("pcmpbf r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
335 if (dc->rd)
336 gen_helper_pcmpbf(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
337 break;
338 case 2:
339 LOG_DIS("pcmpeq r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
340 if (dc->rd) {
341 TCGv t0 = tcg_temp_local_new();
342 l1 = gen_new_label();
343 tcg_gen_movi_tl(t0, 1);
344 tcg_gen_brcond_tl(TCG_COND_EQ,
345 cpu_R[dc->ra], cpu_R[dc->rb], l1);
346 tcg_gen_movi_tl(t0, 0);
347 gen_set_label(l1);
348 tcg_gen_mov_tl(cpu_R[dc->rd], t0);
349 tcg_temp_free(t0);
350 }
351 break;
352 case 3:
353 LOG_DIS("pcmpne r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
354 l1 = gen_new_label();
355 if (dc->rd) {
356 TCGv t0 = tcg_temp_local_new();
357 tcg_gen_movi_tl(t0, 1);
358 tcg_gen_brcond_tl(TCG_COND_NE,
359 cpu_R[dc->ra], cpu_R[dc->rb], l1);
360 tcg_gen_movi_tl(t0, 0);
361 gen_set_label(l1);
362 tcg_gen_mov_tl(cpu_R[dc->rd], t0);
363 tcg_temp_free(t0);
364 }
365 break;
366 default:
367 cpu_abort(dc->env,
368 "unsupported pattern insn opcode=%x\n", dc->opcode);
369 break;
370 }
371 }
372
373 static void dec_and(DisasContext *dc)
374 {
375 unsigned int not;
376
377 if (!dc->type_b && (dc->imm & (1 << 10))) {
378 dec_pattern(dc);
379 return;
380 }
381
382 not = dc->opcode & (1 << 1);
383 LOG_DIS("and%s\n", not ? "n" : "");
384
385 if (!dc->rd)
386 return;
387
388 if (not) {
389 TCGv t = tcg_temp_new();
390 tcg_gen_not_tl(t, *(dec_alu_op_b(dc)));
391 tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], t);
392 tcg_temp_free(t);
393 } else
394 tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
395 }
396
397 static void dec_or(DisasContext *dc)
398 {
399 if (!dc->type_b && (dc->imm & (1 << 10))) {
400 dec_pattern(dc);
401 return;
402 }
403
404 LOG_DIS("or r%d r%d r%d imm=%x\n", dc->rd, dc->ra, dc->rb, dc->imm);
405 if (dc->rd)
406 tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
407 }
408
409 static void dec_xor(DisasContext *dc)
410 {
411 if (!dc->type_b && (dc->imm & (1 << 10))) {
412 dec_pattern(dc);
413 return;
414 }
415
416 LOG_DIS("xor r%d\n", dc->rd);
417 if (dc->rd)
418 tcg_gen_xor_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
419 }
420
421 static inline void msr_read(DisasContext *dc, TCGv d)
422 {
423 tcg_gen_mov_tl(d, cpu_SR[SR_MSR]);
424 }
425
426 static inline void msr_write(DisasContext *dc, TCGv v)
427 {
428 TCGv t;
429
430 t = tcg_temp_new();
431 dc->cpustate_changed = 1;
432 /* PVR bit is not writable. */
433 tcg_gen_andi_tl(t, v, ~MSR_PVR);
434 tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], MSR_PVR);
435 tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], v);
436 tcg_temp_free(t);
437 }
438
439 static void dec_msr(DisasContext *dc)
440 {
441 TCGv t0, t1;
442 unsigned int sr, to, rn;
443 int mem_index = cpu_mmu_index(dc->env);
444
445 sr = dc->imm & ((1 << 14) - 1);
446 to = dc->imm & (1 << 14);
447 dc->type_b = 1;
448 if (to)
449 dc->cpustate_changed = 1;
450
451 /* msrclr and msrset. */
452 if (!(dc->imm & (1 << 15))) {
453 unsigned int clr = dc->ir & (1 << 16);
454
455 LOG_DIS("msr%s r%d imm=%x\n", clr ? "clr" : "set",
456 dc->rd, dc->imm);
457
458 if (!(dc->env->pvr.regs[2] & PVR2_USE_MSR_INSTR)) {
459 /* nop??? */
460 return;
461 }
462
463 if ((dc->tb_flags & MSR_EE_FLAG)
464 && mem_index == MMU_USER_IDX && (dc->imm != 4 && dc->imm != 0)) {
465 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
466 t_gen_raise_exception(dc, EXCP_HW_EXCP);
467 return;
468 }
469
470 if (dc->rd)
471 msr_read(dc, cpu_R[dc->rd]);
472
473 t0 = tcg_temp_new();
474 t1 = tcg_temp_new();
475 msr_read(dc, t0);
476 tcg_gen_mov_tl(t1, *(dec_alu_op_b(dc)));
477
478 if (clr) {
479 tcg_gen_not_tl(t1, t1);
480 tcg_gen_and_tl(t0, t0, t1);
481 } else
482 tcg_gen_or_tl(t0, t0, t1);
483 msr_write(dc, t0);
484 tcg_temp_free(t0);
485 tcg_temp_free(t1);
486 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc + 4);
487 dc->is_jmp = DISAS_UPDATE;
488 return;
489 }
490
491 if (to) {
492 if ((dc->tb_flags & MSR_EE_FLAG)
493 && mem_index == MMU_USER_IDX) {
494 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
495 t_gen_raise_exception(dc, EXCP_HW_EXCP);
496 return;
497 }
498 }
499
500 #if !defined(CONFIG_USER_ONLY)
501 /* Catch read/writes to the mmu block. */
502 if ((sr & ~0xff) == 0x1000) {
503 sr &= 7;
504 LOG_DIS("m%ss sr%d r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm);
505 if (to)
506 gen_helper_mmu_write(tcg_const_tl(sr), cpu_R[dc->ra]);
507 else
508 gen_helper_mmu_read(cpu_R[dc->rd], tcg_const_tl(sr));
509 return;
510 }
511 #endif
512
513 if (to) {
514 LOG_DIS("m%ss sr%x r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm);
515 switch (sr) {
516 case 0:
517 break;
518 case 1:
519 msr_write(dc, cpu_R[dc->ra]);
520 break;
521 case 0x3:
522 tcg_gen_mov_tl(cpu_SR[SR_EAR], cpu_R[dc->ra]);
523 break;
524 case 0x5:
525 tcg_gen_mov_tl(cpu_SR[SR_ESR], cpu_R[dc->ra]);
526 break;
527 case 0x7:
528 tcg_gen_andi_tl(cpu_SR[SR_FSR], cpu_R[dc->ra], 31);
529 break;
530 case 0x800:
531 tcg_gen_st_tl(cpu_R[dc->ra], cpu_env, offsetof(CPUMBState, slr));
532 break;
533 case 0x802:
534 tcg_gen_st_tl(cpu_R[dc->ra], cpu_env, offsetof(CPUMBState, shr));
535 break;
536 default:
537 cpu_abort(dc->env, "unknown mts reg %x\n", sr);
538 break;
539 }
540 } else {
541 LOG_DIS("m%ss r%d sr%x imm=%x\n", to ? "t" : "f", dc->rd, sr, dc->imm);
542
543 switch (sr) {
544 case 0:
545 tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc);
546 break;
547 case 1:
548 msr_read(dc, cpu_R[dc->rd]);
549 break;
550 case 0x3:
551 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_EAR]);
552 break;
553 case 0x5:
554 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_ESR]);
555 break;
556 case 0x7:
557 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_FSR]);
558 break;
559 case 0xb:
560 tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_BTR]);
561 break;
562 case 0x800:
563 tcg_gen_ld_tl(cpu_R[dc->rd], cpu_env, offsetof(CPUMBState, slr));
564 break;
565 case 0x802:
566 tcg_gen_ld_tl(cpu_R[dc->rd], cpu_env, offsetof(CPUMBState, shr));
567 break;
568 case 0x2000:
569 case 0x2001:
570 case 0x2002:
571 case 0x2003:
572 case 0x2004:
573 case 0x2005:
574 case 0x2006:
575 case 0x2007:
576 case 0x2008:
577 case 0x2009:
578 case 0x200a:
579 case 0x200b:
580 case 0x200c:
581 rn = sr & 0xf;
582 tcg_gen_ld_tl(cpu_R[dc->rd],
583 cpu_env, offsetof(CPUMBState, pvr.regs[rn]));
584 break;
585 default:
586 cpu_abort(dc->env, "unknown mfs reg %x\n", sr);
587 break;
588 }
589 }
590
591 if (dc->rd == 0) {
592 tcg_gen_movi_tl(cpu_R[0], 0);
593 }
594 }
595
596 /* 64-bit signed mul, lower result in d and upper in d2. */
597 static void t_gen_muls(TCGv d, TCGv d2, TCGv a, TCGv b)
598 {
599 TCGv_i64 t0, t1;
600
601 t0 = tcg_temp_new_i64();
602 t1 = tcg_temp_new_i64();
603
604 tcg_gen_ext_i32_i64(t0, a);
605 tcg_gen_ext_i32_i64(t1, b);
606 tcg_gen_mul_i64(t0, t0, t1);
607
608 tcg_gen_trunc_i64_i32(d, t0);
609 tcg_gen_shri_i64(t0, t0, 32);
610 tcg_gen_trunc_i64_i32(d2, t0);
611
612 tcg_temp_free_i64(t0);
613 tcg_temp_free_i64(t1);
614 }
615
616 /* 64-bit unsigned muls, lower result in d and upper in d2. */
617 static void t_gen_mulu(TCGv d, TCGv d2, TCGv a, TCGv b)
618 {
619 TCGv_i64 t0, t1;
620
621 t0 = tcg_temp_new_i64();
622 t1 = tcg_temp_new_i64();
623
624 tcg_gen_extu_i32_i64(t0, a);
625 tcg_gen_extu_i32_i64(t1, b);
626 tcg_gen_mul_i64(t0, t0, t1);
627
628 tcg_gen_trunc_i64_i32(d, t0);
629 tcg_gen_shri_i64(t0, t0, 32);
630 tcg_gen_trunc_i64_i32(d2, t0);
631
632 tcg_temp_free_i64(t0);
633 tcg_temp_free_i64(t1);
634 }
635
636 /* Multiplier unit. */
637 static void dec_mul(DisasContext *dc)
638 {
639 TCGv d[2];
640 unsigned int subcode;
641
642 if ((dc->tb_flags & MSR_EE_FLAG)
643 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
644 && !(dc->env->pvr.regs[0] & PVR0_USE_HW_MUL_MASK)) {
645 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
646 t_gen_raise_exception(dc, EXCP_HW_EXCP);
647 return;
648 }
649
650 subcode = dc->imm & 3;
651 d[0] = tcg_temp_new();
652 d[1] = tcg_temp_new();
653
654 if (dc->type_b) {
655 LOG_DIS("muli r%d r%d %x\n", dc->rd, dc->ra, dc->imm);
656 t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
657 goto done;
658 }
659
660 /* mulh, mulhsu and mulhu are not available if C_USE_HW_MUL is < 2. */
661 if (subcode >= 1 && subcode <= 3
662 && !((dc->env->pvr.regs[2] & PVR2_USE_MUL64_MASK))) {
663 /* nop??? */
664 }
665
666 switch (subcode) {
667 case 0:
668 LOG_DIS("mul r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
669 t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], cpu_R[dc->rb]);
670 break;
671 case 1:
672 LOG_DIS("mulh r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
673 t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
674 break;
675 case 2:
676 LOG_DIS("mulhsu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
677 t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
678 break;
679 case 3:
680 LOG_DIS("mulhu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
681 t_gen_mulu(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
682 break;
683 default:
684 cpu_abort(dc->env, "unknown MUL insn %x\n", subcode);
685 break;
686 }
687 done:
688 tcg_temp_free(d[0]);
689 tcg_temp_free(d[1]);
690 }
691
692 /* Div unit. */
693 static void dec_div(DisasContext *dc)
694 {
695 unsigned int u;
696
697 u = dc->imm & 2;
698 LOG_DIS("div\n");
699
700 if ((dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
701 && !((dc->env->pvr.regs[0] & PVR0_USE_DIV_MASK))) {
702 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
703 t_gen_raise_exception(dc, EXCP_HW_EXCP);
704 }
705
706 if (u)
707 gen_helper_divu(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
708 else
709 gen_helper_divs(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]);
710 if (!dc->rd)
711 tcg_gen_movi_tl(cpu_R[dc->rd], 0);
712 }
713
714 static void dec_barrel(DisasContext *dc)
715 {
716 TCGv t0;
717 unsigned int s, t;
718
719 if ((dc->tb_flags & MSR_EE_FLAG)
720 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
721 && !(dc->env->pvr.regs[0] & PVR0_USE_BARREL_MASK)) {
722 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
723 t_gen_raise_exception(dc, EXCP_HW_EXCP);
724 return;
725 }
726
727 s = dc->imm & (1 << 10);
728 t = dc->imm & (1 << 9);
729
730 LOG_DIS("bs%s%s r%d r%d r%d\n",
731 s ? "l" : "r", t ? "a" : "l", dc->rd, dc->ra, dc->rb);
732
733 t0 = tcg_temp_new();
734
735 tcg_gen_mov_tl(t0, *(dec_alu_op_b(dc)));
736 tcg_gen_andi_tl(t0, t0, 31);
737
738 if (s)
739 tcg_gen_shl_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
740 else {
741 if (t)
742 tcg_gen_sar_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
743 else
744 tcg_gen_shr_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
745 }
746 }
747
748 static void dec_bit(DisasContext *dc)
749 {
750 TCGv t0, t1;
751 unsigned int op;
752 int mem_index = cpu_mmu_index(dc->env);
753
754 op = dc->ir & ((1 << 9) - 1);
755 switch (op) {
756 case 0x21:
757 /* src. */
758 t0 = tcg_temp_new();
759
760 LOG_DIS("src r%d r%d\n", dc->rd, dc->ra);
761 tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
762 if (dc->rd) {
763 t1 = tcg_temp_new();
764 read_carry(dc, t1);
765 tcg_gen_shli_tl(t1, t1, 31);
766
767 tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
768 tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->rd], t1);
769 tcg_temp_free(t1);
770 }
771
772 /* Update carry. */
773 write_carry(dc, t0);
774 tcg_temp_free(t0);
775 break;
776
777 case 0x1:
778 case 0x41:
779 /* srl. */
780 t0 = tcg_temp_new();
781 LOG_DIS("srl r%d r%d\n", dc->rd, dc->ra);
782
783 /* Update carry. */
784 tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
785 write_carry(dc, t0);
786 tcg_temp_free(t0);
787 if (dc->rd) {
788 if (op == 0x41)
789 tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
790 else
791 tcg_gen_sari_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
792 }
793 break;
794 case 0x60:
795 LOG_DIS("ext8s r%d r%d\n", dc->rd, dc->ra);
796 tcg_gen_ext8s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
797 break;
798 case 0x61:
799 LOG_DIS("ext16s r%d r%d\n", dc->rd, dc->ra);
800 tcg_gen_ext16s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
801 break;
802 case 0x64:
803 case 0x66:
804 case 0x74:
805 case 0x76:
806 /* wdc. */
807 LOG_DIS("wdc r%d\n", dc->ra);
808 if ((dc->tb_flags & MSR_EE_FLAG)
809 && mem_index == MMU_USER_IDX) {
810 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
811 t_gen_raise_exception(dc, EXCP_HW_EXCP);
812 return;
813 }
814 break;
815 case 0x68:
816 /* wic. */
817 LOG_DIS("wic r%d\n", dc->ra);
818 if ((dc->tb_flags & MSR_EE_FLAG)
819 && mem_index == MMU_USER_IDX) {
820 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
821 t_gen_raise_exception(dc, EXCP_HW_EXCP);
822 return;
823 }
824 break;
825 case 0xe0:
826 if ((dc->tb_flags & MSR_EE_FLAG)
827 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
828 && !((dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR))) {
829 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
830 t_gen_raise_exception(dc, EXCP_HW_EXCP);
831 }
832 if (dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR) {
833 gen_helper_clz(cpu_R[dc->rd], cpu_R[dc->ra]);
834 }
835 break;
836 case 0x1e0:
837 /* swapb */
838 LOG_DIS("swapb r%d r%d\n", dc->rd, dc->ra);
839 tcg_gen_bswap32_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
840 break;
841 case 0x1e1:
842 /*swaph */
843 LOG_DIS("swaph r%d r%d\n", dc->rd, dc->ra);
844 tcg_gen_rotri_i32(cpu_R[dc->rd], cpu_R[dc->ra], 16);
845 break;
846 default:
847 cpu_abort(dc->env, "unknown bit oc=%x op=%x rd=%d ra=%d rb=%d\n",
848 dc->pc, op, dc->rd, dc->ra, dc->rb);
849 break;
850 }
851 }
852
853 static inline void sync_jmpstate(DisasContext *dc)
854 {
855 if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
856 if (dc->jmp == JMP_DIRECT) {
857 tcg_gen_movi_tl(env_btaken, 1);
858 }
859 dc->jmp = JMP_INDIRECT;
860 tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
861 }
862 }
863
864 static void dec_imm(DisasContext *dc)
865 {
866 LOG_DIS("imm %x\n", dc->imm << 16);
867 tcg_gen_movi_tl(env_imm, (dc->imm << 16));
868 dc->tb_flags |= IMM_FLAG;
869 dc->clear_imm = 0;
870 }
871
872 static inline void gen_load(DisasContext *dc, TCGv dst, TCGv addr,
873 unsigned int size)
874 {
875 int mem_index = cpu_mmu_index(dc->env);
876
877 if (size == 1) {
878 tcg_gen_qemu_ld8u(dst, addr, mem_index);
879 } else if (size == 2) {
880 tcg_gen_qemu_ld16u(dst, addr, mem_index);
881 } else if (size == 4) {
882 tcg_gen_qemu_ld32u(dst, addr, mem_index);
883 } else
884 cpu_abort(dc->env, "Incorrect load size %d\n", size);
885 }
886
887 static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t)
888 {
889 unsigned int extimm = dc->tb_flags & IMM_FLAG;
890 /* Should be set to one if r1 is used by loadstores. */
891 int stackprot = 0;
892
893 /* All load/stores use ra. */
894 if (dc->ra == 1) {
895 stackprot = 1;
896 }
897
898 /* Treat the common cases first. */
899 if (!dc->type_b) {
900 /* If any of the regs is r0, return a ptr to the other. */
901 if (dc->ra == 0) {
902 return &cpu_R[dc->rb];
903 } else if (dc->rb == 0) {
904 return &cpu_R[dc->ra];
905 }
906
907 if (dc->rb == 1) {
908 stackprot = 1;
909 }
910
911 *t = tcg_temp_new();
912 tcg_gen_add_tl(*t, cpu_R[dc->ra], cpu_R[dc->rb]);
913
914 if (stackprot) {
915 gen_helper_stackprot(*t);
916 }
917 return t;
918 }
919 /* Immediate. */
920 if (!extimm) {
921 if (dc->imm == 0) {
922 return &cpu_R[dc->ra];
923 }
924 *t = tcg_temp_new();
925 tcg_gen_movi_tl(*t, (int32_t)((int16_t)dc->imm));
926 tcg_gen_add_tl(*t, cpu_R[dc->ra], *t);
927 } else {
928 *t = tcg_temp_new();
929 tcg_gen_add_tl(*t, cpu_R[dc->ra], *(dec_alu_op_b(dc)));
930 }
931
932 if (stackprot) {
933 gen_helper_stackprot(*t);
934 }
935 return t;
936 }
937
938 static inline void dec_byteswap(DisasContext *dc, TCGv dst, TCGv src, int size)
939 {
940 if (size == 4) {
941 tcg_gen_bswap32_tl(dst, src);
942 } else if (size == 2) {
943 TCGv t = tcg_temp_new();
944
945 /* bswap16 assumes the high bits are zero. */
946 tcg_gen_andi_tl(t, src, 0xffff);
947 tcg_gen_bswap16_tl(dst, t);
948 tcg_temp_free(t);
949 } else {
950 /* Ignore.
951 cpu_abort(dc->env, "Invalid ldst byteswap size %d\n", size);
952 */
953 }
954 }
955
956 static void dec_load(DisasContext *dc)
957 {
958 TCGv t, *addr;
959 unsigned int size, rev = 0, ex = 0;
960
961 size = 1 << (dc->opcode & 3);
962
963 if (!dc->type_b) {
964 rev = (dc->ir >> 9) & 1;
965 ex = (dc->ir >> 10) & 1;
966 }
967
968 if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
969 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
970 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
971 t_gen_raise_exception(dc, EXCP_HW_EXCP);
972 return;
973 }
974
975 LOG_DIS("l%d%s%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : "",
976 ex ? "x" : "");
977
978 t_sync_flags(dc);
979 addr = compute_ldst_addr(dc, &t);
980
981 /*
982 * When doing reverse accesses we need to do two things.
983 *
984 * 1. Reverse the address wrt endianness.
985 * 2. Byteswap the data lanes on the way back into the CPU core.
986 */
987 if (rev && size != 4) {
988 /* Endian reverse the address. t is addr. */
989 switch (size) {
990 case 1:
991 {
992 /* 00 -> 11
993 01 -> 10
994 10 -> 10
995 11 -> 00 */
996 TCGv low = tcg_temp_new();
997
998 /* Force addr into the temp. */
999 if (addr != &t) {
1000 t = tcg_temp_new();
1001 tcg_gen_mov_tl(t, *addr);
1002 addr = &t;
1003 }
1004
1005 tcg_gen_andi_tl(low, t, 3);
1006 tcg_gen_sub_tl(low, tcg_const_tl(3), low);
1007 tcg_gen_andi_tl(t, t, ~3);
1008 tcg_gen_or_tl(t, t, low);
1009 tcg_gen_mov_tl(env_imm, t);
1010 tcg_temp_free(low);
1011 break;
1012 }
1013
1014 case 2:
1015 /* 00 -> 10
1016 10 -> 00. */
1017 /* Force addr into the temp. */
1018 if (addr != &t) {
1019 t = tcg_temp_new();
1020 tcg_gen_xori_tl(t, *addr, 2);
1021 addr = &t;
1022 } else {
1023 tcg_gen_xori_tl(t, t, 2);
1024 }
1025 break;
1026 default:
1027 cpu_abort(dc->env, "Invalid reverse size\n");
1028 break;
1029 }
1030 }
1031
1032 /* lwx does not throw unaligned access errors, so force alignment */
1033 if (ex) {
1034 /* Force addr into the temp. */
1035 if (addr != &t) {
1036 t = tcg_temp_new();
1037 tcg_gen_mov_tl(t, *addr);
1038 addr = &t;
1039 }
1040 tcg_gen_andi_tl(t, t, ~3);
1041 }
1042
1043 /* If we get a fault on a dslot, the jmpstate better be in sync. */
1044 sync_jmpstate(dc);
1045
1046 /* Verify alignment if needed. */
1047 if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
1048 TCGv v = tcg_temp_new();
1049
1050 /*
1051 * Microblaze gives MMU faults priority over faults due to
1052 * unaligned addresses. That's why we speculatively do the load
1053 * into v. If the load succeeds, we verify alignment of the
1054 * address and if that succeeds we write into the destination reg.
1055 */
1056 gen_load(dc, v, *addr, size);
1057
1058 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1059 gen_helper_memalign(*addr, tcg_const_tl(dc->rd),
1060 tcg_const_tl(0), tcg_const_tl(size - 1));
1061 if (dc->rd) {
1062 if (rev) {
1063 dec_byteswap(dc, cpu_R[dc->rd], v, size);
1064 } else {
1065 tcg_gen_mov_tl(cpu_R[dc->rd], v);
1066 }
1067 }
1068 tcg_temp_free(v);
1069 } else {
1070 if (dc->rd) {
1071 gen_load(dc, cpu_R[dc->rd], *addr, size);
1072 if (rev) {
1073 dec_byteswap(dc, cpu_R[dc->rd], cpu_R[dc->rd], size);
1074 }
1075 } else {
1076 /* We are loading into r0, no need to reverse. */
1077 gen_load(dc, env_imm, *addr, size);
1078 }
1079 }
1080
1081 if (ex) { /* lwx */
1082 /* no support for for AXI exclusive so always clear C */
1083 write_carryi(dc, 0);
1084 tcg_gen_st_tl(*addr, cpu_env, offsetof(CPUMBState, res_addr));
1085 }
1086
1087 if (addr == &t)
1088 tcg_temp_free(t);
1089 }
1090
1091 static void gen_store(DisasContext *dc, TCGv addr, TCGv val,
1092 unsigned int size)
1093 {
1094 int mem_index = cpu_mmu_index(dc->env);
1095
1096 if (size == 1)
1097 tcg_gen_qemu_st8(val, addr, mem_index);
1098 else if (size == 2) {
1099 tcg_gen_qemu_st16(val, addr, mem_index);
1100 } else if (size == 4) {
1101 tcg_gen_qemu_st32(val, addr, mem_index);
1102 } else
1103 cpu_abort(dc->env, "Incorrect store size %d\n", size);
1104 }
1105
1106 static void dec_store(DisasContext *dc)
1107 {
1108 TCGv t, *addr, swx_addr, r_check = 0;
1109 int swx_skip = 0;
1110 unsigned int size, rev = 0, ex = 0;
1111
1112 size = 1 << (dc->opcode & 3);
1113 if (!dc->type_b) {
1114 rev = (dc->ir >> 9) & 1;
1115 ex = (dc->ir >> 10) & 1;
1116 }
1117
1118 if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
1119 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
1120 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1121 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1122 return;
1123 }
1124
1125 LOG_DIS("s%d%s%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : "",
1126 ex ? "x" : "");
1127 t_sync_flags(dc);
1128 /* If we get a fault on a dslot, the jmpstate better be in sync. */
1129 sync_jmpstate(dc);
1130 addr = compute_ldst_addr(dc, &t);
1131
1132 if (ex) { /* swx */
1133 r_check = tcg_temp_new();
1134 swx_addr = tcg_temp_local_new();
1135
1136 /* Force addr into the swx_addr. */
1137 tcg_gen_mov_tl(swx_addr, *addr);
1138 addr = &swx_addr;
1139 /* swx does not throw unaligned access errors, so force alignment */
1140 tcg_gen_andi_tl(swx_addr, swx_addr, ~3);
1141
1142 tcg_gen_ld_tl(r_check, cpu_env, offsetof(CPUMBState, res_addr));
1143 write_carryi(dc, 1);
1144 swx_skip = gen_new_label();
1145 tcg_gen_brcond_tl(TCG_COND_NE, r_check, swx_addr, swx_skip);
1146 write_carryi(dc, 0);
1147 }
1148
1149 if (rev && size != 4) {
1150 /* Endian reverse the address. t is addr. */
1151 switch (size) {
1152 case 1:
1153 {
1154 /* 00 -> 11
1155 01 -> 10
1156 10 -> 10
1157 11 -> 00 */
1158 TCGv low = tcg_temp_new();
1159
1160 /* Force addr into the temp. */
1161 if (addr != &t) {
1162 t = tcg_temp_new();
1163 tcg_gen_mov_tl(t, *addr);
1164 addr = &t;
1165 }
1166
1167 tcg_gen_andi_tl(low, t, 3);
1168 tcg_gen_sub_tl(low, tcg_const_tl(3), low);
1169 tcg_gen_andi_tl(t, t, ~3);
1170 tcg_gen_or_tl(t, t, low);
1171 tcg_gen_mov_tl(env_imm, t);
1172 tcg_temp_free(low);
1173 break;
1174 }
1175
1176 case 2:
1177 /* 00 -> 10
1178 10 -> 00. */
1179 /* Force addr into the temp. */
1180 if (addr != &t) {
1181 t = tcg_temp_new();
1182 tcg_gen_xori_tl(t, *addr, 2);
1183 addr = &t;
1184 } else {
1185 tcg_gen_xori_tl(t, t, 2);
1186 }
1187 break;
1188 default:
1189 cpu_abort(dc->env, "Invalid reverse size\n");
1190 break;
1191 }
1192
1193 if (size != 1) {
1194 TCGv bs_data = tcg_temp_new();
1195 dec_byteswap(dc, bs_data, cpu_R[dc->rd], size);
1196 gen_store(dc, *addr, bs_data, size);
1197 tcg_temp_free(bs_data);
1198 } else {
1199 gen_store(dc, *addr, cpu_R[dc->rd], size);
1200 }
1201 } else {
1202 if (rev) {
1203 TCGv bs_data = tcg_temp_new();
1204 dec_byteswap(dc, bs_data, cpu_R[dc->rd], size);
1205 gen_store(dc, *addr, bs_data, size);
1206 tcg_temp_free(bs_data);
1207 } else {
1208 gen_store(dc, *addr, cpu_R[dc->rd], size);
1209 }
1210 }
1211
1212 /* Verify alignment if needed. */
1213 if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
1214 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1215 /* FIXME: if the alignment is wrong, we should restore the value
1216 * in memory. One possible way to achieve this is to probe
1217 * the MMU prior to the memaccess, thay way we could put
1218 * the alignment checks in between the probe and the mem
1219 * access.
1220 */
1221 gen_helper_memalign(*addr, tcg_const_tl(dc->rd),
1222 tcg_const_tl(1), tcg_const_tl(size - 1));
1223 }
1224 if (ex) {
1225 gen_set_label(swx_skip);
1226 tcg_temp_free(r_check);
1227 tcg_temp_free(swx_addr);
1228 }
1229
1230 if (addr == &t)
1231 tcg_temp_free(t);
1232 }
1233
1234 static inline void eval_cc(DisasContext *dc, unsigned int cc,
1235 TCGv d, TCGv a, TCGv b)
1236 {
1237 switch (cc) {
1238 case CC_EQ:
1239 tcg_gen_setcond_tl(TCG_COND_EQ, d, a, b);
1240 break;
1241 case CC_NE:
1242 tcg_gen_setcond_tl(TCG_COND_NE, d, a, b);
1243 break;
1244 case CC_LT:
1245 tcg_gen_setcond_tl(TCG_COND_LT, d, a, b);
1246 break;
1247 case CC_LE:
1248 tcg_gen_setcond_tl(TCG_COND_LE, d, a, b);
1249 break;
1250 case CC_GE:
1251 tcg_gen_setcond_tl(TCG_COND_GE, d, a, b);
1252 break;
1253 case CC_GT:
1254 tcg_gen_setcond_tl(TCG_COND_GT, d, a, b);
1255 break;
1256 default:
1257 cpu_abort(dc->env, "Unknown condition code %x.\n", cc);
1258 break;
1259 }
1260 }
1261
1262 static void eval_cond_jmp(DisasContext *dc, TCGv pc_true, TCGv pc_false)
1263 {
1264 int l1;
1265
1266 l1 = gen_new_label();
1267 /* Conditional jmp. */
1268 tcg_gen_mov_tl(cpu_SR[SR_PC], pc_false);
1269 tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1);
1270 tcg_gen_mov_tl(cpu_SR[SR_PC], pc_true);
1271 gen_set_label(l1);
1272 }
1273
1274 static void dec_bcc(DisasContext *dc)
1275 {
1276 unsigned int cc;
1277 unsigned int dslot;
1278
1279 cc = EXTRACT_FIELD(dc->ir, 21, 23);
1280 dslot = dc->ir & (1 << 25);
1281 LOG_DIS("bcc%s r%d %x\n", dslot ? "d" : "", dc->ra, dc->imm);
1282
1283 dc->delayed_branch = 1;
1284 if (dslot) {
1285 dc->delayed_branch = 2;
1286 dc->tb_flags |= D_FLAG;
1287 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1288 cpu_env, offsetof(CPUMBState, bimm));
1289 }
1290
1291 if (dec_alu_op_b_is_small_imm(dc)) {
1292 int32_t offset = (int32_t)((int16_t)dc->imm); /* sign-extend. */
1293
1294 tcg_gen_movi_tl(env_btarget, dc->pc + offset);
1295 dc->jmp = JMP_DIRECT_CC;
1296 dc->jmp_pc = dc->pc + offset;
1297 } else {
1298 dc->jmp = JMP_INDIRECT;
1299 tcg_gen_movi_tl(env_btarget, dc->pc);
1300 tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc)));
1301 }
1302 eval_cc(dc, cc, env_btaken, cpu_R[dc->ra], tcg_const_tl(0));
1303 }
1304
1305 static void dec_br(DisasContext *dc)
1306 {
1307 unsigned int dslot, link, abs, mbar;
1308 int mem_index = cpu_mmu_index(dc->env);
1309
1310 dslot = dc->ir & (1 << 20);
1311 abs = dc->ir & (1 << 19);
1312 link = dc->ir & (1 << 18);
1313
1314 /* Memory barrier. */
1315 mbar = (dc->ir >> 16) & 31;
1316 if (mbar == 2 && dc->imm == 4) {
1317 LOG_DIS("mbar %d\n", dc->rd);
1318 /* Break the TB. */
1319 dc->cpustate_changed = 1;
1320 return;
1321 }
1322
1323 LOG_DIS("br%s%s%s%s imm=%x\n",
1324 abs ? "a" : "", link ? "l" : "",
1325 dc->type_b ? "i" : "", dslot ? "d" : "",
1326 dc->imm);
1327
1328 dc->delayed_branch = 1;
1329 if (dslot) {
1330 dc->delayed_branch = 2;
1331 dc->tb_flags |= D_FLAG;
1332 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1333 cpu_env, offsetof(CPUMBState, bimm));
1334 }
1335 if (link && dc->rd)
1336 tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc);
1337
1338 dc->jmp = JMP_INDIRECT;
1339 if (abs) {
1340 tcg_gen_movi_tl(env_btaken, 1);
1341 tcg_gen_mov_tl(env_btarget, *(dec_alu_op_b(dc)));
1342 if (link && !dslot) {
1343 if (!(dc->tb_flags & IMM_FLAG) && (dc->imm == 8 || dc->imm == 0x18))
1344 t_gen_raise_exception(dc, EXCP_BREAK);
1345 if (dc->imm == 0) {
1346 if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) {
1347 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1348 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1349 return;
1350 }
1351
1352 t_gen_raise_exception(dc, EXCP_DEBUG);
1353 }
1354 }
1355 } else {
1356 if (dec_alu_op_b_is_small_imm(dc)) {
1357 dc->jmp = JMP_DIRECT;
1358 dc->jmp_pc = dc->pc + (int32_t)((int16_t)dc->imm);
1359 } else {
1360 tcg_gen_movi_tl(env_btaken, 1);
1361 tcg_gen_movi_tl(env_btarget, dc->pc);
1362 tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc)));
1363 }
1364 }
1365 }
1366
1367 static inline void do_rti(DisasContext *dc)
1368 {
1369 TCGv t0, t1;
1370 t0 = tcg_temp_new();
1371 t1 = tcg_temp_new();
1372 tcg_gen_shri_tl(t0, cpu_SR[SR_MSR], 1);
1373 tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_IE);
1374 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1375
1376 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1377 tcg_gen_or_tl(t1, t1, t0);
1378 msr_write(dc, t1);
1379 tcg_temp_free(t1);
1380 tcg_temp_free(t0);
1381 dc->tb_flags &= ~DRTI_FLAG;
1382 }
1383
1384 static inline void do_rtb(DisasContext *dc)
1385 {
1386 TCGv t0, t1;
1387 t0 = tcg_temp_new();
1388 t1 = tcg_temp_new();
1389 tcg_gen_andi_tl(t1, cpu_SR[SR_MSR], ~MSR_BIP);
1390 tcg_gen_shri_tl(t0, t1, 1);
1391 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1392
1393 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1394 tcg_gen_or_tl(t1, t1, t0);
1395 msr_write(dc, t1);
1396 tcg_temp_free(t1);
1397 tcg_temp_free(t0);
1398 dc->tb_flags &= ~DRTB_FLAG;
1399 }
1400
1401 static inline void do_rte(DisasContext *dc)
1402 {
1403 TCGv t0, t1;
1404 t0 = tcg_temp_new();
1405 t1 = tcg_temp_new();
1406
1407 tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_EE);
1408 tcg_gen_andi_tl(t1, t1, ~MSR_EIP);
1409 tcg_gen_shri_tl(t0, t1, 1);
1410 tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM));
1411
1412 tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM));
1413 tcg_gen_or_tl(t1, t1, t0);
1414 msr_write(dc, t1);
1415 tcg_temp_free(t1);
1416 tcg_temp_free(t0);
1417 dc->tb_flags &= ~DRTE_FLAG;
1418 }
1419
1420 static void dec_rts(DisasContext *dc)
1421 {
1422 unsigned int b_bit, i_bit, e_bit;
1423 int mem_index = cpu_mmu_index(dc->env);
1424
1425 i_bit = dc->ir & (1 << 21);
1426 b_bit = dc->ir & (1 << 22);
1427 e_bit = dc->ir & (1 << 23);
1428
1429 dc->delayed_branch = 2;
1430 dc->tb_flags |= D_FLAG;
1431 tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)),
1432 cpu_env, offsetof(CPUMBState, bimm));
1433
1434 if (i_bit) {
1435 LOG_DIS("rtid ir=%x\n", dc->ir);
1436 if ((dc->tb_flags & MSR_EE_FLAG)
1437 && mem_index == MMU_USER_IDX) {
1438 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1439 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1440 }
1441 dc->tb_flags |= DRTI_FLAG;
1442 } else if (b_bit) {
1443 LOG_DIS("rtbd ir=%x\n", dc->ir);
1444 if ((dc->tb_flags & MSR_EE_FLAG)
1445 && mem_index == MMU_USER_IDX) {
1446 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1447 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1448 }
1449 dc->tb_flags |= DRTB_FLAG;
1450 } else if (e_bit) {
1451 LOG_DIS("rted ir=%x\n", dc->ir);
1452 if ((dc->tb_flags & MSR_EE_FLAG)
1453 && mem_index == MMU_USER_IDX) {
1454 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1455 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1456 }
1457 dc->tb_flags |= DRTE_FLAG;
1458 } else
1459 LOG_DIS("rts ir=%x\n", dc->ir);
1460
1461 dc->jmp = JMP_INDIRECT;
1462 tcg_gen_movi_tl(env_btaken, 1);
1463 tcg_gen_add_tl(env_btarget, cpu_R[dc->ra], *(dec_alu_op_b(dc)));
1464 }
1465
1466 static int dec_check_fpuv2(DisasContext *dc)
1467 {
1468 int r;
1469
1470 r = dc->env->pvr.regs[2] & PVR2_USE_FPU2_MASK;
1471
1472 if (!r && (dc->tb_flags & MSR_EE_FLAG)) {
1473 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_FPU);
1474 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1475 }
1476 return r;
1477 }
1478
1479 static void dec_fpu(DisasContext *dc)
1480 {
1481 unsigned int fpu_insn;
1482
1483 if ((dc->tb_flags & MSR_EE_FLAG)
1484 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
1485 && !((dc->env->pvr.regs[2] & PVR2_USE_FPU_MASK))) {
1486 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1487 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1488 return;
1489 }
1490
1491 fpu_insn = (dc->ir >> 7) & 7;
1492
1493 switch (fpu_insn) {
1494 case 0:
1495 gen_helper_fadd(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1496 break;
1497
1498 case 1:
1499 gen_helper_frsub(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1500 break;
1501
1502 case 2:
1503 gen_helper_fmul(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1504 break;
1505
1506 case 3:
1507 gen_helper_fdiv(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
1508 break;
1509
1510 case 4:
1511 switch ((dc->ir >> 4) & 7) {
1512 case 0:
1513 gen_helper_fcmp_un(cpu_R[dc->rd],
1514 cpu_R[dc->ra], cpu_R[dc->rb]);
1515 break;
1516 case 1:
1517 gen_helper_fcmp_lt(cpu_R[dc->rd],
1518 cpu_R[dc->ra], cpu_R[dc->rb]);
1519 break;
1520 case 2:
1521 gen_helper_fcmp_eq(cpu_R[dc->rd],
1522 cpu_R[dc->ra], cpu_R[dc->rb]);
1523 break;
1524 case 3:
1525 gen_helper_fcmp_le(cpu_R[dc->rd],
1526 cpu_R[dc->ra], cpu_R[dc->rb]);
1527 break;
1528 case 4:
1529 gen_helper_fcmp_gt(cpu_R[dc->rd],
1530 cpu_R[dc->ra], cpu_R[dc->rb]);
1531 break;
1532 case 5:
1533 gen_helper_fcmp_ne(cpu_R[dc->rd],
1534 cpu_R[dc->ra], cpu_R[dc->rb]);
1535 break;
1536 case 6:
1537 gen_helper_fcmp_ge(cpu_R[dc->rd],
1538 cpu_R[dc->ra], cpu_R[dc->rb]);
1539 break;
1540 default:
1541 qemu_log ("unimplemented fcmp fpu_insn=%x pc=%x opc=%x\n",
1542 fpu_insn, dc->pc, dc->opcode);
1543 dc->abort_at_next_insn = 1;
1544 break;
1545 }
1546 break;
1547
1548 case 5:
1549 if (!dec_check_fpuv2(dc)) {
1550 return;
1551 }
1552 gen_helper_flt(cpu_R[dc->rd], cpu_R[dc->ra]);
1553 break;
1554
1555 case 6:
1556 if (!dec_check_fpuv2(dc)) {
1557 return;
1558 }
1559 gen_helper_fint(cpu_R[dc->rd], cpu_R[dc->ra]);
1560 break;
1561
1562 case 7:
1563 if (!dec_check_fpuv2(dc)) {
1564 return;
1565 }
1566 gen_helper_fsqrt(cpu_R[dc->rd], cpu_R[dc->ra]);
1567 break;
1568
1569 default:
1570 qemu_log ("unimplemented FPU insn fpu_insn=%x pc=%x opc=%x\n",
1571 fpu_insn, dc->pc, dc->opcode);
1572 dc->abort_at_next_insn = 1;
1573 break;
1574 }
1575 }
1576
1577 static void dec_null(DisasContext *dc)
1578 {
1579 if ((dc->tb_flags & MSR_EE_FLAG)
1580 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
1581 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1582 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1583 return;
1584 }
1585 qemu_log ("unknown insn pc=%x opc=%x\n", dc->pc, dc->opcode);
1586 dc->abort_at_next_insn = 1;
1587 }
1588
1589 /* Insns connected to FSL or AXI stream attached devices. */
1590 static void dec_stream(DisasContext *dc)
1591 {
1592 int mem_index = cpu_mmu_index(dc->env);
1593 TCGv_i32 t_id, t_ctrl;
1594 int ctrl;
1595
1596 LOG_DIS("%s%s imm=%x\n", dc->rd ? "get" : "put",
1597 dc->type_b ? "" : "d", dc->imm);
1598
1599 if ((dc->tb_flags & MSR_EE_FLAG) && (mem_index == MMU_USER_IDX)) {
1600 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN);
1601 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1602 return;
1603 }
1604
1605 t_id = tcg_temp_new();
1606 if (dc->type_b) {
1607 tcg_gen_movi_tl(t_id, dc->imm & 0xf);
1608 ctrl = dc->imm >> 10;
1609 } else {
1610 tcg_gen_andi_tl(t_id, cpu_R[dc->rb], 0xf);
1611 ctrl = dc->imm >> 5;
1612 }
1613
1614 t_ctrl = tcg_const_tl(ctrl);
1615
1616 if (dc->rd == 0) {
1617 gen_helper_put(t_id, t_ctrl, cpu_R[dc->ra]);
1618 } else {
1619 gen_helper_get(cpu_R[dc->rd], t_id, t_ctrl);
1620 }
1621 tcg_temp_free(t_id);
1622 tcg_temp_free(t_ctrl);
1623 }
1624
1625 static struct decoder_info {
1626 struct {
1627 uint32_t bits;
1628 uint32_t mask;
1629 };
1630 void (*dec)(DisasContext *dc);
1631 } decinfo[] = {
1632 {DEC_ADD, dec_add},
1633 {DEC_SUB, dec_sub},
1634 {DEC_AND, dec_and},
1635 {DEC_XOR, dec_xor},
1636 {DEC_OR, dec_or},
1637 {DEC_BIT, dec_bit},
1638 {DEC_BARREL, dec_barrel},
1639 {DEC_LD, dec_load},
1640 {DEC_ST, dec_store},
1641 {DEC_IMM, dec_imm},
1642 {DEC_BR, dec_br},
1643 {DEC_BCC, dec_bcc},
1644 {DEC_RTS, dec_rts},
1645 {DEC_FPU, dec_fpu},
1646 {DEC_MUL, dec_mul},
1647 {DEC_DIV, dec_div},
1648 {DEC_MSR, dec_msr},
1649 {DEC_STREAM, dec_stream},
1650 {{0, 0}, dec_null}
1651 };
1652
1653 static inline void decode(DisasContext *dc)
1654 {
1655 uint32_t ir;
1656 int i;
1657
1658 if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP)))
1659 tcg_gen_debug_insn_start(dc->pc);
1660
1661 dc->ir = ir = ldl_code(dc->pc);
1662 LOG_DIS("%8.8x\t", dc->ir);
1663
1664 if (dc->ir)
1665 dc->nr_nops = 0;
1666 else {
1667 if ((dc->tb_flags & MSR_EE_FLAG)
1668 && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
1669 && (dc->env->pvr.regs[2] & PVR2_OPCODE_0x0_ILL_MASK)) {
1670 tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
1671 t_gen_raise_exception(dc, EXCP_HW_EXCP);
1672 return;
1673 }
1674
1675 LOG_DIS("nr_nops=%d\t", dc->nr_nops);
1676 dc->nr_nops++;
1677 if (dc->nr_nops > 4)
1678 cpu_abort(dc->env, "fetching nop sequence\n");
1679 }
1680 /* bit 2 seems to indicate insn type. */
1681 dc->type_b = ir & (1 << 29);
1682
1683 dc->opcode = EXTRACT_FIELD(ir, 26, 31);
1684 dc->rd = EXTRACT_FIELD(ir, 21, 25);
1685 dc->ra = EXTRACT_FIELD(ir, 16, 20);
1686 dc->rb = EXTRACT_FIELD(ir, 11, 15);
1687 dc->imm = EXTRACT_FIELD(ir, 0, 15);
1688
1689 /* Large switch for all insns. */
1690 for (i = 0; i < ARRAY_SIZE(decinfo); i++) {
1691 if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits) {
1692 decinfo[i].dec(dc);
1693 break;
1694 }
1695 }
1696 }
1697
1698 static void check_breakpoint(CPUMBState *env, DisasContext *dc)
1699 {
1700 CPUBreakpoint *bp;
1701
1702 if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
1703 QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
1704 if (bp->pc == dc->pc) {
1705 t_gen_raise_exception(dc, EXCP_DEBUG);
1706 dc->is_jmp = DISAS_UPDATE;
1707 }
1708 }
1709 }
1710 }
1711
1712 /* generate intermediate code for basic block 'tb'. */
1713 static void
1714 gen_intermediate_code_internal(CPUMBState *env, TranslationBlock *tb,
1715 int search_pc)
1716 {
1717 uint16_t *gen_opc_end;
1718 uint32_t pc_start;
1719 int j, lj;
1720 struct DisasContext ctx;
1721 struct DisasContext *dc = &ctx;
1722 uint32_t next_page_start, org_flags;
1723 target_ulong npc;
1724 int num_insns;
1725 int max_insns;
1726
1727 qemu_log_try_set_file(stderr);
1728
1729 pc_start = tb->pc;
1730 dc->env = env;
1731 dc->tb = tb;
1732 org_flags = dc->synced_flags = dc->tb_flags = tb->flags;
1733
1734 gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
1735
1736 dc->is_jmp = DISAS_NEXT;
1737 dc->jmp = 0;
1738 dc->delayed_branch = !!(dc->tb_flags & D_FLAG);
1739 if (dc->delayed_branch) {
1740 dc->jmp = JMP_INDIRECT;
1741 }
1742 dc->pc = pc_start;
1743 dc->singlestep_enabled = env->singlestep_enabled;
1744 dc->cpustate_changed = 0;
1745 dc->abort_at_next_insn = 0;
1746 dc->nr_nops = 0;
1747
1748 if (pc_start & 3)
1749 cpu_abort(env, "Microblaze: unaligned PC=%x\n", pc_start);
1750
1751 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1752 #if !SIM_COMPAT
1753 qemu_log("--------------\n");
1754 log_cpu_state(env, 0);
1755 #endif
1756 }
1757
1758 next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
1759 lj = -1;
1760 num_insns = 0;
1761 max_insns = tb->cflags & CF_COUNT_MASK;
1762 if (max_insns == 0)
1763 max_insns = CF_COUNT_MASK;
1764
1765 gen_icount_start();
1766 do
1767 {
1768 #if SIM_COMPAT
1769 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1770 tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc);
1771 gen_helper_debug();
1772 }
1773 #endif
1774 check_breakpoint(env, dc);
1775
1776 if (search_pc) {
1777 j = gen_opc_ptr - gen_opc_buf;
1778 if (lj < j) {
1779 lj++;
1780 while (lj < j)
1781 gen_opc_instr_start[lj++] = 0;
1782 }
1783 gen_opc_pc[lj] = dc->pc;
1784 gen_opc_instr_start[lj] = 1;
1785 gen_opc_icount[lj] = num_insns;
1786 }
1787
1788 /* Pretty disas. */
1789 LOG_DIS("%8.8x:\t", dc->pc);
1790
1791 if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
1792 gen_io_start();
1793
1794 dc->clear_imm = 1;
1795 decode(dc);
1796 if (dc->clear_imm)
1797 dc->tb_flags &= ~IMM_FLAG;
1798 dc->pc += 4;
1799 num_insns++;
1800
1801 if (dc->delayed_branch) {
1802 dc->delayed_branch--;
1803 if (!dc->delayed_branch) {
1804 if (dc->tb_flags & DRTI_FLAG)
1805 do_rti(dc);
1806 if (dc->tb_flags & DRTB_FLAG)
1807 do_rtb(dc);
1808 if (dc->tb_flags & DRTE_FLAG)
1809 do_rte(dc);
1810 /* Clear the delay slot flag. */
1811 dc->tb_flags &= ~D_FLAG;
1812 /* If it is a direct jump, try direct chaining. */
1813 if (dc->jmp == JMP_INDIRECT) {
1814 eval_cond_jmp(dc, env_btarget, tcg_const_tl(dc->pc));
1815 dc->is_jmp = DISAS_JUMP;
1816 } else if (dc->jmp == JMP_DIRECT) {
1817 t_sync_flags(dc);
1818 gen_goto_tb(dc, 0, dc->jmp_pc);
1819 dc->is_jmp = DISAS_TB_JUMP;
1820 } else if (dc->jmp == JMP_DIRECT_CC) {
1821 int l1;
1822
1823 t_sync_flags(dc);
1824 l1 = gen_new_label();
1825 /* Conditional jmp. */
1826 tcg_gen_brcondi_tl(TCG_COND_NE, env_btaken, 0, l1);
1827 gen_goto_tb(dc, 1, dc->pc);
1828 gen_set_label(l1);
1829 gen_goto_tb(dc, 0, dc->jmp_pc);
1830
1831 dc->is_jmp = DISAS_TB_JUMP;
1832 }
1833 break;
1834 }
1835 }
1836 if (env->singlestep_enabled)
1837 break;
1838 } while (!dc->is_jmp && !dc->cpustate_changed
1839 && gen_opc_ptr < gen_opc_end
1840 && !singlestep
1841 && (dc->pc < next_page_start)
1842 && num_insns < max_insns);
1843
1844 npc = dc->pc;
1845 if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
1846 if (dc->tb_flags & D_FLAG) {
1847 dc->is_jmp = DISAS_UPDATE;
1848 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1849 sync_jmpstate(dc);
1850 } else
1851 npc = dc->jmp_pc;
1852 }
1853
1854 if (tb->cflags & CF_LAST_IO)
1855 gen_io_end();
1856 /* Force an update if the per-tb cpu state has changed. */
1857 if (dc->is_jmp == DISAS_NEXT
1858 && (dc->cpustate_changed || org_flags != dc->tb_flags)) {
1859 dc->is_jmp = DISAS_UPDATE;
1860 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1861 }
1862 t_sync_flags(dc);
1863
1864 if (unlikely(env->singlestep_enabled)) {
1865 TCGv_i32 tmp = tcg_const_i32(EXCP_DEBUG);
1866
1867 if (dc->is_jmp != DISAS_JUMP) {
1868 tcg_gen_movi_tl(cpu_SR[SR_PC], npc);
1869 }
1870 gen_helper_raise_exception(tmp);
1871 tcg_temp_free_i32(tmp);
1872 } else {
1873 switch(dc->is_jmp) {
1874 case DISAS_NEXT:
1875 gen_goto_tb(dc, 1, npc);
1876 break;
1877 default:
1878 case DISAS_JUMP:
1879 case DISAS_UPDATE:
1880 /* indicate that the hash table must be used
1881 to find the next TB */
1882 tcg_gen_exit_tb(0);
1883 break;
1884 case DISAS_TB_JUMP:
1885 /* nothing more to generate */
1886 break;
1887 }
1888 }
1889 gen_icount_end(tb, num_insns);
1890 *gen_opc_ptr = INDEX_op_end;
1891 if (search_pc) {
1892 j = gen_opc_ptr - gen_opc_buf;
1893 lj++;
1894 while (lj <= j)
1895 gen_opc_instr_start[lj++] = 0;
1896 } else {
1897 tb->size = dc->pc - pc_start;
1898 tb->icount = num_insns;
1899 }
1900
1901 #ifdef DEBUG_DISAS
1902 #if !SIM_COMPAT
1903 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
1904 qemu_log("\n");
1905 #if DISAS_GNU
1906 log_target_disas(pc_start, dc->pc - pc_start, 0);
1907 #endif
1908 qemu_log("\nisize=%d osize=%td\n",
1909 dc->pc - pc_start, gen_opc_ptr - gen_opc_buf);
1910 }
1911 #endif
1912 #endif
1913 assert(!dc->abort_at_next_insn);
1914 }
1915
1916 void gen_intermediate_code (CPUMBState *env, struct TranslationBlock *tb)
1917 {
1918 gen_intermediate_code_internal(env, tb, 0);
1919 }
1920
1921 void gen_intermediate_code_pc (CPUMBState *env, struct TranslationBlock *tb)
1922 {
1923 gen_intermediate_code_internal(env, tb, 1);
1924 }
1925
1926 void cpu_dump_state (CPUMBState *env, FILE *f, fprintf_function cpu_fprintf,
1927 int flags)
1928 {
1929 int i;
1930
1931 if (!env || !f)
1932 return;
1933
1934 cpu_fprintf(f, "IN: PC=%x %s\n",
1935 env->sregs[SR_PC], lookup_symbol(env->sregs[SR_PC]));
1936 cpu_fprintf(f, "rmsr=%x resr=%x rear=%x debug=%x imm=%x iflags=%x fsr=%x\n",
1937 env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
1938 env->debug, env->imm, env->iflags, env->sregs[SR_FSR]);
1939 cpu_fprintf(f, "btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
1940 env->btaken, env->btarget,
1941 (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
1942 (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
1943 (env->sregs[SR_MSR] & MSR_EIP),
1944 (env->sregs[SR_MSR] & MSR_IE));
1945
1946 for (i = 0; i < 32; i++) {
1947 cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
1948 if ((i + 1) % 4 == 0)
1949 cpu_fprintf(f, "\n");
1950 }
1951 cpu_fprintf(f, "\n\n");
1952 }
1953
1954 MicroBlazeCPU *cpu_mb_init(const char *cpu_model)
1955 {
1956 MicroBlazeCPU *cpu;
1957 static int tcg_initialized = 0;
1958 int i;
1959
1960 cpu = MICROBLAZE_CPU(object_new(TYPE_MICROBLAZE_CPU));
1961
1962 cpu_reset(CPU(cpu));
1963 qemu_init_vcpu(&cpu->env);
1964
1965 if (tcg_initialized) {
1966 return cpu;
1967 }
1968
1969 tcg_initialized = 1;
1970
1971 cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
1972
1973 env_debug = tcg_global_mem_new(TCG_AREG0,
1974 offsetof(CPUMBState, debug),
1975 "debug0");
1976 env_iflags = tcg_global_mem_new(TCG_AREG0,
1977 offsetof(CPUMBState, iflags),
1978 "iflags");
1979 env_imm = tcg_global_mem_new(TCG_AREG0,
1980 offsetof(CPUMBState, imm),
1981 "imm");
1982 env_btarget = tcg_global_mem_new(TCG_AREG0,
1983 offsetof(CPUMBState, btarget),
1984 "btarget");
1985 env_btaken = tcg_global_mem_new(TCG_AREG0,
1986 offsetof(CPUMBState, btaken),
1987 "btaken");
1988 for (i = 0; i < ARRAY_SIZE(cpu_R); i++) {
1989 cpu_R[i] = tcg_global_mem_new(TCG_AREG0,
1990 offsetof(CPUMBState, regs[i]),
1991 regnames[i]);
1992 }
1993 for (i = 0; i < ARRAY_SIZE(cpu_SR); i++) {
1994 cpu_SR[i] = tcg_global_mem_new(TCG_AREG0,
1995 offsetof(CPUMBState, sregs[i]),
1996 special_regnames[i]);
1997 }
1998 #define GEN_HELPER 2
1999 #include "helper.h"
2000
2001 return cpu;
2002 }
2003
2004 void restore_state_to_opc(CPUMBState *env, TranslationBlock *tb, int pc_pos)
2005 {
2006 env->sregs[SR_PC] = gen_opc_pc[pc_pos];
2007 }
Qemu copy for testing