scsi: esp: check buffer length before reading scsi command
[qemu.git] / target-cris / translate.c
1 /*
2 * CRIS emulation for qemu: main translation routines.
3 *
4 * Copyright (c) 2008 AXIS Communications AB
5 * Written by Edgar E. Iglesias.
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 /*
22 * FIXME:
23 * The condition code translation is in need of attention.
24 */
25
26 #include "qemu/osdep.h"
27 #include "cpu.h"
28 #include "disas/disas.h"
29 #include "exec/exec-all.h"
30 #include "tcg-op.h"
31 #include "exec/helper-proto.h"
32 #include "mmu.h"
33 #include "exec/cpu_ldst.h"
34 #include "crisv32-decode.h"
35
36 #include "exec/helper-gen.h"
37
38 #include "trace-tcg.h"
39 #include "exec/log.h"
40
41
42 #define DISAS_CRIS 0
43 #if DISAS_CRIS
44 # define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__)
45 #else
46 # define LOG_DIS(...) do { } while (0)
47 #endif
48
49 #define D(x)
50 #define BUG() (gen_BUG(dc, __FILE__, __LINE__))
51 #define BUG_ON(x) ({if (x) BUG();})
52
53 #define DISAS_SWI 5
54
55 /* Used by the decoder. */
56 #define EXTRACT_FIELD(src, start, end) \
57 (((src) >> start) & ((1 << (end - start + 1)) - 1))
58
59 #define CC_MASK_NZ 0xc
60 #define CC_MASK_NZV 0xe
61 #define CC_MASK_NZVC 0xf
62 #define CC_MASK_RNZV 0x10e
63
64 static TCGv_env cpu_env;
65 static TCGv cpu_R[16];
66 static TCGv cpu_PR[16];
67 static TCGv cc_x;
68 static TCGv cc_src;
69 static TCGv cc_dest;
70 static TCGv cc_result;
71 static TCGv cc_op;
72 static TCGv cc_size;
73 static TCGv cc_mask;
74
75 static TCGv env_btaken;
76 static TCGv env_btarget;
77 static TCGv env_pc;
78
79 #include "exec/gen-icount.h"
80
81 /* This is the state at translation time. */
82 typedef struct DisasContext {
83 CRISCPU *cpu;
84 target_ulong pc, ppc;
85
86 /* Decoder. */
87 unsigned int (*decoder)(CPUCRISState *env, struct DisasContext *dc);
88 uint32_t ir;
89 uint32_t opcode;
90 unsigned int op1;
91 unsigned int op2;
92 unsigned int zsize, zzsize;
93 unsigned int mode;
94 unsigned int postinc;
95
96 unsigned int size;
97 unsigned int src;
98 unsigned int dst;
99 unsigned int cond;
100
101 int update_cc;
102 int cc_op;
103 int cc_size;
104 uint32_t cc_mask;
105
106 int cc_size_uptodate; /* -1 invalid or last written value. */
107
108 int cc_x_uptodate; /* 1 - ccs, 2 - known | X_FLAG. 0 not up-to-date. */
109 int flags_uptodate; /* Whether or not $ccs is up-to-date. */
110 int flagx_known; /* Whether or not flags_x has the x flag known at
111 translation time. */
112 int flags_x;
113
114 int clear_x; /* Clear x after this insn? */
115 int clear_prefix; /* Clear prefix after this insn? */
116 int clear_locked_irq; /* Clear the irq lockout. */
117 int cpustate_changed;
118 unsigned int tb_flags; /* tb dependent flags. */
119 int is_jmp;
120
121 #define JMP_NOJMP 0
122 #define JMP_DIRECT 1
123 #define JMP_DIRECT_CC 2
124 #define JMP_INDIRECT 3
125 int jmp; /* 0=nojmp, 1=direct, 2=indirect. */
126 uint32_t jmp_pc;
127
128 int delayed_branch;
129
130 struct TranslationBlock *tb;
131 int singlestep_enabled;
132 } DisasContext;
133
134 static void gen_BUG(DisasContext *dc, const char *file, int line)
135 {
136 fprintf(stderr, "BUG: pc=%x %s %d\n", dc->pc, file, line);
137 if (qemu_log_separate()) {
138 qemu_log("BUG: pc=%x %s %d\n", dc->pc, file, line);
139 }
140 cpu_abort(CPU(dc->cpu), "%s:%d\n", file, line);
141 }
142
143 static const char *regnames[] =
144 {
145 "$r0", "$r1", "$r2", "$r3",
146 "$r4", "$r5", "$r6", "$r7",
147 "$r8", "$r9", "$r10", "$r11",
148 "$r12", "$r13", "$sp", "$acr",
149 };
150 static const char *pregnames[] =
151 {
152 "$bz", "$vr", "$pid", "$srs",
153 "$wz", "$exs", "$eda", "$mof",
154 "$dz", "$ebp", "$erp", "$srp",
155 "$nrp", "$ccs", "$usp", "$spc",
156 };
157
158 /* We need this table to handle preg-moves with implicit width. */
159 static int preg_sizes[] = {
160 1, /* bz. */
161 1, /* vr. */
162 4, /* pid. */
163 1, /* srs. */
164 2, /* wz. */
165 4, 4, 4,
166 4, 4, 4, 4,
167 4, 4, 4, 4,
168 };
169
170 #define t_gen_mov_TN_env(tn, member) \
171 tcg_gen_ld_tl(tn, cpu_env, offsetof(CPUCRISState, member))
172 #define t_gen_mov_env_TN(member, tn) \
173 tcg_gen_st_tl(tn, cpu_env, offsetof(CPUCRISState, member))
174
175 static inline void t_gen_mov_TN_preg(TCGv tn, int r)
176 {
177 assert(r >= 0 && r <= 15);
178 if (r == PR_BZ || r == PR_WZ || r == PR_DZ) {
179 tcg_gen_mov_tl(tn, tcg_const_tl(0));
180 } else if (r == PR_VR) {
181 tcg_gen_mov_tl(tn, tcg_const_tl(32));
182 } else {
183 tcg_gen_mov_tl(tn, cpu_PR[r]);
184 }
185 }
186 static inline void t_gen_mov_preg_TN(DisasContext *dc, int r, TCGv tn)
187 {
188 assert(r >= 0 && r <= 15);
189 if (r == PR_BZ || r == PR_WZ || r == PR_DZ) {
190 return;
191 } else if (r == PR_SRS) {
192 tcg_gen_andi_tl(cpu_PR[r], tn, 3);
193 } else {
194 if (r == PR_PID) {
195 gen_helper_tlb_flush_pid(cpu_env, tn);
196 }
197 if (dc->tb_flags & S_FLAG && r == PR_SPC) {
198 gen_helper_spc_write(cpu_env, tn);
199 } else if (r == PR_CCS) {
200 dc->cpustate_changed = 1;
201 }
202 tcg_gen_mov_tl(cpu_PR[r], tn);
203 }
204 }
205
206 /* Sign extend at translation time. */
207 static int sign_extend(unsigned int val, unsigned int width)
208 {
209 int sval;
210
211 /* LSL. */
212 val <<= 31 - width;
213 sval = val;
214 /* ASR. */
215 sval >>= 31 - width;
216 return sval;
217 }
218
219 static int cris_fetch(CPUCRISState *env, DisasContext *dc, uint32_t addr,
220 unsigned int size, unsigned int sign)
221 {
222 int r;
223
224 switch (size) {
225 case 4:
226 {
227 r = cpu_ldl_code(env, addr);
228 break;
229 }
230 case 2:
231 {
232 if (sign) {
233 r = cpu_ldsw_code(env, addr);
234 } else {
235 r = cpu_lduw_code(env, addr);
236 }
237 break;
238 }
239 case 1:
240 {
241 if (sign) {
242 r = cpu_ldsb_code(env, addr);
243 } else {
244 r = cpu_ldub_code(env, addr);
245 }
246 break;
247 }
248 default:
249 cpu_abort(CPU(dc->cpu), "Invalid fetch size %d\n", size);
250 break;
251 }
252 return r;
253 }
254
255 static void cris_lock_irq(DisasContext *dc)
256 {
257 dc->clear_locked_irq = 0;
258 t_gen_mov_env_TN(locked_irq, tcg_const_tl(1));
259 }
260
261 static inline void t_gen_raise_exception(uint32_t index)
262 {
263 TCGv_i32 tmp = tcg_const_i32(index);
264 gen_helper_raise_exception(cpu_env, tmp);
265 tcg_temp_free_i32(tmp);
266 }
267
268 static void t_gen_lsl(TCGv d, TCGv a, TCGv b)
269 {
270 TCGv t0, t_31;
271
272 t0 = tcg_temp_new();
273 t_31 = tcg_const_tl(31);
274 tcg_gen_shl_tl(d, a, b);
275
276 tcg_gen_sub_tl(t0, t_31, b);
277 tcg_gen_sar_tl(t0, t0, t_31);
278 tcg_gen_and_tl(t0, t0, d);
279 tcg_gen_xor_tl(d, d, t0);
280 tcg_temp_free(t0);
281 tcg_temp_free(t_31);
282 }
283
284 static void t_gen_lsr(TCGv d, TCGv a, TCGv b)
285 {
286 TCGv t0, t_31;
287
288 t0 = tcg_temp_new();
289 t_31 = tcg_temp_new();
290 tcg_gen_shr_tl(d, a, b);
291
292 tcg_gen_movi_tl(t_31, 31);
293 tcg_gen_sub_tl(t0, t_31, b);
294 tcg_gen_sar_tl(t0, t0, t_31);
295 tcg_gen_and_tl(t0, t0, d);
296 tcg_gen_xor_tl(d, d, t0);
297 tcg_temp_free(t0);
298 tcg_temp_free(t_31);
299 }
300
301 static void t_gen_asr(TCGv d, TCGv a, TCGv b)
302 {
303 TCGv t0, t_31;
304
305 t0 = tcg_temp_new();
306 t_31 = tcg_temp_new();
307 tcg_gen_sar_tl(d, a, b);
308
309 tcg_gen_movi_tl(t_31, 31);
310 tcg_gen_sub_tl(t0, t_31, b);
311 tcg_gen_sar_tl(t0, t0, t_31);
312 tcg_gen_or_tl(d, d, t0);
313 tcg_temp_free(t0);
314 tcg_temp_free(t_31);
315 }
316
317 static void t_gen_cris_dstep(TCGv d, TCGv a, TCGv b)
318 {
319 TCGv t = tcg_temp_new();
320
321 /*
322 * d <<= 1
323 * if (d >= s)
324 * d -= s;
325 */
326 tcg_gen_shli_tl(d, a, 1);
327 tcg_gen_sub_tl(t, d, b);
328 tcg_gen_movcond_tl(TCG_COND_GEU, d, d, b, t, d);
329 tcg_temp_free(t);
330 }
331
332 static void t_gen_cris_mstep(TCGv d, TCGv a, TCGv b, TCGv ccs)
333 {
334 TCGv t;
335
336 /*
337 * d <<= 1
338 * if (n)
339 * d += s;
340 */
341 t = tcg_temp_new();
342 tcg_gen_shli_tl(d, a, 1);
343 tcg_gen_shli_tl(t, ccs, 31 - 3);
344 tcg_gen_sari_tl(t, t, 31);
345 tcg_gen_and_tl(t, t, b);
346 tcg_gen_add_tl(d, d, t);
347 tcg_temp_free(t);
348 }
349
350 /* Extended arithmetics on CRIS. */
351 static inline void t_gen_add_flag(TCGv d, int flag)
352 {
353 TCGv c;
354
355 c = tcg_temp_new();
356 t_gen_mov_TN_preg(c, PR_CCS);
357 /* Propagate carry into d. */
358 tcg_gen_andi_tl(c, c, 1 << flag);
359 if (flag) {
360 tcg_gen_shri_tl(c, c, flag);
361 }
362 tcg_gen_add_tl(d, d, c);
363 tcg_temp_free(c);
364 }
365
366 static inline void t_gen_addx_carry(DisasContext *dc, TCGv d)
367 {
368 if (dc->flagx_known) {
369 if (dc->flags_x) {
370 TCGv c;
371
372 c = tcg_temp_new();
373 t_gen_mov_TN_preg(c, PR_CCS);
374 /* C flag is already at bit 0. */
375 tcg_gen_andi_tl(c, c, C_FLAG);
376 tcg_gen_add_tl(d, d, c);
377 tcg_temp_free(c);
378 }
379 } else {
380 TCGv x, c;
381
382 x = tcg_temp_new();
383 c = tcg_temp_new();
384 t_gen_mov_TN_preg(x, PR_CCS);
385 tcg_gen_mov_tl(c, x);
386
387 /* Propagate carry into d if X is set. Branch free. */
388 tcg_gen_andi_tl(c, c, C_FLAG);
389 tcg_gen_andi_tl(x, x, X_FLAG);
390 tcg_gen_shri_tl(x, x, 4);
391
392 tcg_gen_and_tl(x, x, c);
393 tcg_gen_add_tl(d, d, x);
394 tcg_temp_free(x);
395 tcg_temp_free(c);
396 }
397 }
398
399 static inline void t_gen_subx_carry(DisasContext *dc, TCGv d)
400 {
401 if (dc->flagx_known) {
402 if (dc->flags_x) {
403 TCGv c;
404
405 c = tcg_temp_new();
406 t_gen_mov_TN_preg(c, PR_CCS);
407 /* C flag is already at bit 0. */
408 tcg_gen_andi_tl(c, c, C_FLAG);
409 tcg_gen_sub_tl(d, d, c);
410 tcg_temp_free(c);
411 }
412 } else {
413 TCGv x, c;
414
415 x = tcg_temp_new();
416 c = tcg_temp_new();
417 t_gen_mov_TN_preg(x, PR_CCS);
418 tcg_gen_mov_tl(c, x);
419
420 /* Propagate carry into d if X is set. Branch free. */
421 tcg_gen_andi_tl(c, c, C_FLAG);
422 tcg_gen_andi_tl(x, x, X_FLAG);
423 tcg_gen_shri_tl(x, x, 4);
424
425 tcg_gen_and_tl(x, x, c);
426 tcg_gen_sub_tl(d, d, x);
427 tcg_temp_free(x);
428 tcg_temp_free(c);
429 }
430 }
431
432 /* Swap the two bytes within each half word of the s operand.
433 T0 = ((T0 << 8) & 0xff00ff00) | ((T0 >> 8) & 0x00ff00ff) */
434 static inline void t_gen_swapb(TCGv d, TCGv s)
435 {
436 TCGv t, org_s;
437
438 t = tcg_temp_new();
439 org_s = tcg_temp_new();
440
441 /* d and s may refer to the same object. */
442 tcg_gen_mov_tl(org_s, s);
443 tcg_gen_shli_tl(t, org_s, 8);
444 tcg_gen_andi_tl(d, t, 0xff00ff00);
445 tcg_gen_shri_tl(t, org_s, 8);
446 tcg_gen_andi_tl(t, t, 0x00ff00ff);
447 tcg_gen_or_tl(d, d, t);
448 tcg_temp_free(t);
449 tcg_temp_free(org_s);
450 }
451
452 /* Swap the halfwords of the s operand. */
453 static inline void t_gen_swapw(TCGv d, TCGv s)
454 {
455 TCGv t;
456 /* d and s refer the same object. */
457 t = tcg_temp_new();
458 tcg_gen_mov_tl(t, s);
459 tcg_gen_shli_tl(d, t, 16);
460 tcg_gen_shri_tl(t, t, 16);
461 tcg_gen_or_tl(d, d, t);
462 tcg_temp_free(t);
463 }
464
465 /* Reverse the within each byte.
466 T0 = (((T0 << 7) & 0x80808080) |
467 ((T0 << 5) & 0x40404040) |
468 ((T0 << 3) & 0x20202020) |
469 ((T0 << 1) & 0x10101010) |
470 ((T0 >> 1) & 0x08080808) |
471 ((T0 >> 3) & 0x04040404) |
472 ((T0 >> 5) & 0x02020202) |
473 ((T0 >> 7) & 0x01010101));
474 */
475 static inline void t_gen_swapr(TCGv d, TCGv s)
476 {
477 struct {
478 int shift; /* LSL when positive, LSR when negative. */
479 uint32_t mask;
480 } bitrev[] = {
481 {7, 0x80808080},
482 {5, 0x40404040},
483 {3, 0x20202020},
484 {1, 0x10101010},
485 {-1, 0x08080808},
486 {-3, 0x04040404},
487 {-5, 0x02020202},
488 {-7, 0x01010101}
489 };
490 int i;
491 TCGv t, org_s;
492
493 /* d and s refer the same object. */
494 t = tcg_temp_new();
495 org_s = tcg_temp_new();
496 tcg_gen_mov_tl(org_s, s);
497
498 tcg_gen_shli_tl(t, org_s, bitrev[0].shift);
499 tcg_gen_andi_tl(d, t, bitrev[0].mask);
500 for (i = 1; i < ARRAY_SIZE(bitrev); i++) {
501 if (bitrev[i].shift >= 0) {
502 tcg_gen_shli_tl(t, org_s, bitrev[i].shift);
503 } else {
504 tcg_gen_shri_tl(t, org_s, -bitrev[i].shift);
505 }
506 tcg_gen_andi_tl(t, t, bitrev[i].mask);
507 tcg_gen_or_tl(d, d, t);
508 }
509 tcg_temp_free(t);
510 tcg_temp_free(org_s);
511 }
512
513 static void t_gen_cc_jmp(TCGv pc_true, TCGv pc_false)
514 {
515 TCGLabel *l1 = gen_new_label();
516
517 /* Conditional jmp. */
518 tcg_gen_mov_tl(env_pc, pc_false);
519 tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1);
520 tcg_gen_mov_tl(env_pc, pc_true);
521 gen_set_label(l1);
522 }
523
524 static inline bool use_goto_tb(DisasContext *dc, target_ulong dest)
525 {
526 #ifndef CONFIG_USER_ONLY
527 return (dc->tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) ||
528 (dc->ppc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK);
529 #else
530 return true;
531 #endif
532 }
533
534 static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
535 {
536 if (use_goto_tb(dc, dest)) {
537 tcg_gen_goto_tb(n);
538 tcg_gen_movi_tl(env_pc, dest);
539 tcg_gen_exit_tb((uintptr_t)dc->tb + n);
540 } else {
541 tcg_gen_movi_tl(env_pc, dest);
542 tcg_gen_exit_tb(0);
543 }
544 }
545
546 static inline void cris_clear_x_flag(DisasContext *dc)
547 {
548 if (dc->flagx_known && dc->flags_x) {
549 dc->flags_uptodate = 0;
550 }
551
552 dc->flagx_known = 1;
553 dc->flags_x = 0;
554 }
555
556 static void cris_flush_cc_state(DisasContext *dc)
557 {
558 if (dc->cc_size_uptodate != dc->cc_size) {
559 tcg_gen_movi_tl(cc_size, dc->cc_size);
560 dc->cc_size_uptodate = dc->cc_size;
561 }
562 tcg_gen_movi_tl(cc_op, dc->cc_op);
563 tcg_gen_movi_tl(cc_mask, dc->cc_mask);
564 }
565
566 static void cris_evaluate_flags(DisasContext *dc)
567 {
568 if (dc->flags_uptodate) {
569 return;
570 }
571
572 cris_flush_cc_state(dc);
573
574 switch (dc->cc_op) {
575 case CC_OP_MCP:
576 gen_helper_evaluate_flags_mcp(cpu_PR[PR_CCS], cpu_env,
577 cpu_PR[PR_CCS], cc_src,
578 cc_dest, cc_result);
579 break;
580 case CC_OP_MULS:
581 gen_helper_evaluate_flags_muls(cpu_PR[PR_CCS], cpu_env,
582 cpu_PR[PR_CCS], cc_result,
583 cpu_PR[PR_MOF]);
584 break;
585 case CC_OP_MULU:
586 gen_helper_evaluate_flags_mulu(cpu_PR[PR_CCS], cpu_env,
587 cpu_PR[PR_CCS], cc_result,
588 cpu_PR[PR_MOF]);
589 break;
590 case CC_OP_MOVE:
591 case CC_OP_AND:
592 case CC_OP_OR:
593 case CC_OP_XOR:
594 case CC_OP_ASR:
595 case CC_OP_LSR:
596 case CC_OP_LSL:
597 switch (dc->cc_size) {
598 case 4:
599 gen_helper_evaluate_flags_move_4(cpu_PR[PR_CCS],
600 cpu_env, cpu_PR[PR_CCS], cc_result);
601 break;
602 case 2:
603 gen_helper_evaluate_flags_move_2(cpu_PR[PR_CCS],
604 cpu_env, cpu_PR[PR_CCS], cc_result);
605 break;
606 default:
607 gen_helper_evaluate_flags(cpu_env);
608 break;
609 }
610 break;
611 case CC_OP_FLAGS:
612 /* live. */
613 break;
614 case CC_OP_SUB:
615 case CC_OP_CMP:
616 if (dc->cc_size == 4) {
617 gen_helper_evaluate_flags_sub_4(cpu_PR[PR_CCS], cpu_env,
618 cpu_PR[PR_CCS], cc_src, cc_dest, cc_result);
619 } else {
620 gen_helper_evaluate_flags(cpu_env);
621 }
622
623 break;
624 default:
625 switch (dc->cc_size) {
626 case 4:
627 gen_helper_evaluate_flags_alu_4(cpu_PR[PR_CCS], cpu_env,
628 cpu_PR[PR_CCS], cc_src, cc_dest, cc_result);
629 break;
630 default:
631 gen_helper_evaluate_flags(cpu_env);
632 break;
633 }
634 break;
635 }
636
637 if (dc->flagx_known) {
638 if (dc->flags_x) {
639 tcg_gen_ori_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], X_FLAG);
640 } else if (dc->cc_op == CC_OP_FLAGS) {
641 tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~X_FLAG);
642 }
643 }
644 dc->flags_uptodate = 1;
645 }
646
647 static void cris_cc_mask(DisasContext *dc, unsigned int mask)
648 {
649 uint32_t ovl;
650
651 if (!mask) {
652 dc->update_cc = 0;
653 return;
654 }
655
656 /* Check if we need to evaluate the condition codes due to
657 CC overlaying. */
658 ovl = (dc->cc_mask ^ mask) & ~mask;
659 if (ovl) {
660 /* TODO: optimize this case. It trigs all the time. */
661 cris_evaluate_flags(dc);
662 }
663 dc->cc_mask = mask;
664 dc->update_cc = 1;
665 }
666
667 static void cris_update_cc_op(DisasContext *dc, int op, int size)
668 {
669 dc->cc_op = op;
670 dc->cc_size = size;
671 dc->flags_uptodate = 0;
672 }
673
674 static inline void cris_update_cc_x(DisasContext *dc)
675 {
676 /* Save the x flag state at the time of the cc snapshot. */
677 if (dc->flagx_known) {
678 if (dc->cc_x_uptodate == (2 | dc->flags_x)) {
679 return;
680 }
681 tcg_gen_movi_tl(cc_x, dc->flags_x);
682 dc->cc_x_uptodate = 2 | dc->flags_x;
683 } else {
684 tcg_gen_andi_tl(cc_x, cpu_PR[PR_CCS], X_FLAG);
685 dc->cc_x_uptodate = 1;
686 }
687 }
688
689 /* Update cc prior to executing ALU op. Needs source operands untouched. */
690 static void cris_pre_alu_update_cc(DisasContext *dc, int op,
691 TCGv dst, TCGv src, int size)
692 {
693 if (dc->update_cc) {
694 cris_update_cc_op(dc, op, size);
695 tcg_gen_mov_tl(cc_src, src);
696
697 if (op != CC_OP_MOVE
698 && op != CC_OP_AND
699 && op != CC_OP_OR
700 && op != CC_OP_XOR
701 && op != CC_OP_ASR
702 && op != CC_OP_LSR
703 && op != CC_OP_LSL) {
704 tcg_gen_mov_tl(cc_dest, dst);
705 }
706
707 cris_update_cc_x(dc);
708 }
709 }
710
711 /* Update cc after executing ALU op. needs the result. */
712 static inline void cris_update_result(DisasContext *dc, TCGv res)
713 {
714 if (dc->update_cc) {
715 tcg_gen_mov_tl(cc_result, res);
716 }
717 }
718
719 /* Returns one if the write back stage should execute. */
720 static void cris_alu_op_exec(DisasContext *dc, int op,
721 TCGv dst, TCGv a, TCGv b, int size)
722 {
723 /* Emit the ALU insns. */
724 switch (op) {
725 case CC_OP_ADD:
726 tcg_gen_add_tl(dst, a, b);
727 /* Extended arithmetics. */
728 t_gen_addx_carry(dc, dst);
729 break;
730 case CC_OP_ADDC:
731 tcg_gen_add_tl(dst, a, b);
732 t_gen_add_flag(dst, 0); /* C_FLAG. */
733 break;
734 case CC_OP_MCP:
735 tcg_gen_add_tl(dst, a, b);
736 t_gen_add_flag(dst, 8); /* R_FLAG. */
737 break;
738 case CC_OP_SUB:
739 tcg_gen_sub_tl(dst, a, b);
740 /* Extended arithmetics. */
741 t_gen_subx_carry(dc, dst);
742 break;
743 case CC_OP_MOVE:
744 tcg_gen_mov_tl(dst, b);
745 break;
746 case CC_OP_OR:
747 tcg_gen_or_tl(dst, a, b);
748 break;
749 case CC_OP_AND:
750 tcg_gen_and_tl(dst, a, b);
751 break;
752 case CC_OP_XOR:
753 tcg_gen_xor_tl(dst, a, b);
754 break;
755 case CC_OP_LSL:
756 t_gen_lsl(dst, a, b);
757 break;
758 case CC_OP_LSR:
759 t_gen_lsr(dst, a, b);
760 break;
761 case CC_OP_ASR:
762 t_gen_asr(dst, a, b);
763 break;
764 case CC_OP_NEG:
765 tcg_gen_neg_tl(dst, b);
766 /* Extended arithmetics. */
767 t_gen_subx_carry(dc, dst);
768 break;
769 case CC_OP_LZ:
770 gen_helper_lz(dst, b);
771 break;
772 case CC_OP_MULS:
773 tcg_gen_muls2_tl(dst, cpu_PR[PR_MOF], a, b);
774 break;
775 case CC_OP_MULU:
776 tcg_gen_mulu2_tl(dst, cpu_PR[PR_MOF], a, b);
777 break;
778 case CC_OP_DSTEP:
779 t_gen_cris_dstep(dst, a, b);
780 break;
781 case CC_OP_MSTEP:
782 t_gen_cris_mstep(dst, a, b, cpu_PR[PR_CCS]);
783 break;
784 case CC_OP_BOUND:
785 tcg_gen_movcond_tl(TCG_COND_LEU, dst, a, b, a, b);
786 break;
787 case CC_OP_CMP:
788 tcg_gen_sub_tl(dst, a, b);
789 /* Extended arithmetics. */
790 t_gen_subx_carry(dc, dst);
791 break;
792 default:
793 qemu_log_mask(LOG_GUEST_ERROR, "illegal ALU op.\n");
794 BUG();
795 break;
796 }
797
798 if (size == 1) {
799 tcg_gen_andi_tl(dst, dst, 0xff);
800 } else if (size == 2) {
801 tcg_gen_andi_tl(dst, dst, 0xffff);
802 }
803 }
804
805 static void cris_alu(DisasContext *dc, int op,
806 TCGv d, TCGv op_a, TCGv op_b, int size)
807 {
808 TCGv tmp;
809 int writeback;
810
811 writeback = 1;
812
813 if (op == CC_OP_CMP) {
814 tmp = tcg_temp_new();
815 writeback = 0;
816 } else if (size == 4) {
817 tmp = d;
818 writeback = 0;
819 } else {
820 tmp = tcg_temp_new();
821 }
822
823
824 cris_pre_alu_update_cc(dc, op, op_a, op_b, size);
825 cris_alu_op_exec(dc, op, tmp, op_a, op_b, size);
826 cris_update_result(dc, tmp);
827
828 /* Writeback. */
829 if (writeback) {
830 if (size == 1) {
831 tcg_gen_andi_tl(d, d, ~0xff);
832 } else {
833 tcg_gen_andi_tl(d, d, ~0xffff);
834 }
835 tcg_gen_or_tl(d, d, tmp);
836 }
837 if (!TCGV_EQUAL(tmp, d)) {
838 tcg_temp_free(tmp);
839 }
840 }
841
842 static int arith_cc(DisasContext *dc)
843 {
844 if (dc->update_cc) {
845 switch (dc->cc_op) {
846 case CC_OP_ADDC: return 1;
847 case CC_OP_ADD: return 1;
848 case CC_OP_SUB: return 1;
849 case CC_OP_DSTEP: return 1;
850 case CC_OP_LSL: return 1;
851 case CC_OP_LSR: return 1;
852 case CC_OP_ASR: return 1;
853 case CC_OP_CMP: return 1;
854 case CC_OP_NEG: return 1;
855 case CC_OP_OR: return 1;
856 case CC_OP_AND: return 1;
857 case CC_OP_XOR: return 1;
858 case CC_OP_MULU: return 1;
859 case CC_OP_MULS: return 1;
860 default:
861 return 0;
862 }
863 }
864 return 0;
865 }
866
867 static void gen_tst_cc (DisasContext *dc, TCGv cc, int cond)
868 {
869 int arith_opt, move_opt;
870
871 /* TODO: optimize more condition codes. */
872
873 /*
874 * If the flags are live, we've gotta look into the bits of CCS.
875 * Otherwise, if we just did an arithmetic operation we try to
876 * evaluate the condition code faster.
877 *
878 * When this function is done, T0 should be non-zero if the condition
879 * code is true.
880 */
881 arith_opt = arith_cc(dc) && !dc->flags_uptodate;
882 move_opt = (dc->cc_op == CC_OP_MOVE);
883 switch (cond) {
884 case CC_EQ:
885 if ((arith_opt || move_opt)
886 && dc->cc_x_uptodate != (2 | X_FLAG)) {
887 tcg_gen_setcond_tl(TCG_COND_EQ, cc,
888 cc_result, tcg_const_tl(0));
889 } else {
890 cris_evaluate_flags(dc);
891 tcg_gen_andi_tl(cc,
892 cpu_PR[PR_CCS], Z_FLAG);
893 }
894 break;
895 case CC_NE:
896 if ((arith_opt || move_opt)
897 && dc->cc_x_uptodate != (2 | X_FLAG)) {
898 tcg_gen_mov_tl(cc, cc_result);
899 } else {
900 cris_evaluate_flags(dc);
901 tcg_gen_xori_tl(cc, cpu_PR[PR_CCS],
902 Z_FLAG);
903 tcg_gen_andi_tl(cc, cc, Z_FLAG);
904 }
905 break;
906 case CC_CS:
907 cris_evaluate_flags(dc);
908 tcg_gen_andi_tl(cc, cpu_PR[PR_CCS], C_FLAG);
909 break;
910 case CC_CC:
911 cris_evaluate_flags(dc);
912 tcg_gen_xori_tl(cc, cpu_PR[PR_CCS], C_FLAG);
913 tcg_gen_andi_tl(cc, cc, C_FLAG);
914 break;
915 case CC_VS:
916 cris_evaluate_flags(dc);
917 tcg_gen_andi_tl(cc, cpu_PR[PR_CCS], V_FLAG);
918 break;
919 case CC_VC:
920 cris_evaluate_flags(dc);
921 tcg_gen_xori_tl(cc, cpu_PR[PR_CCS],
922 V_FLAG);
923 tcg_gen_andi_tl(cc, cc, V_FLAG);
924 break;
925 case CC_PL:
926 if (arith_opt || move_opt) {
927 int bits = 31;
928
929 if (dc->cc_size == 1) {
930 bits = 7;
931 } else if (dc->cc_size == 2) {
932 bits = 15;
933 }
934
935 tcg_gen_shri_tl(cc, cc_result, bits);
936 tcg_gen_xori_tl(cc, cc, 1);
937 } else {
938 cris_evaluate_flags(dc);
939 tcg_gen_xori_tl(cc, cpu_PR[PR_CCS],
940 N_FLAG);
941 tcg_gen_andi_tl(cc, cc, N_FLAG);
942 }
943 break;
944 case CC_MI:
945 if (arith_opt || move_opt) {
946 int bits = 31;
947
948 if (dc->cc_size == 1) {
949 bits = 7;
950 } else if (dc->cc_size == 2) {
951 bits = 15;
952 }
953
954 tcg_gen_shri_tl(cc, cc_result, bits);
955 tcg_gen_andi_tl(cc, cc, 1);
956 } else {
957 cris_evaluate_flags(dc);
958 tcg_gen_andi_tl(cc, cpu_PR[PR_CCS],
959 N_FLAG);
960 }
961 break;
962 case CC_LS:
963 cris_evaluate_flags(dc);
964 tcg_gen_andi_tl(cc, cpu_PR[PR_CCS],
965 C_FLAG | Z_FLAG);
966 break;
967 case CC_HI:
968 cris_evaluate_flags(dc);
969 {
970 TCGv tmp;
971
972 tmp = tcg_temp_new();
973 tcg_gen_xori_tl(tmp, cpu_PR[PR_CCS],
974 C_FLAG | Z_FLAG);
975 /* Overlay the C flag on top of the Z. */
976 tcg_gen_shli_tl(cc, tmp, 2);
977 tcg_gen_and_tl(cc, tmp, cc);
978 tcg_gen_andi_tl(cc, cc, Z_FLAG);
979
980 tcg_temp_free(tmp);
981 }
982 break;
983 case CC_GE:
984 cris_evaluate_flags(dc);
985 /* Overlay the V flag on top of the N. */
986 tcg_gen_shli_tl(cc, cpu_PR[PR_CCS], 2);
987 tcg_gen_xor_tl(cc,
988 cpu_PR[PR_CCS], cc);
989 tcg_gen_andi_tl(cc, cc, N_FLAG);
990 tcg_gen_xori_tl(cc, cc, N_FLAG);
991 break;
992 case CC_LT:
993 cris_evaluate_flags(dc);
994 /* Overlay the V flag on top of the N. */
995 tcg_gen_shli_tl(cc, cpu_PR[PR_CCS], 2);
996 tcg_gen_xor_tl(cc,
997 cpu_PR[PR_CCS], cc);
998 tcg_gen_andi_tl(cc, cc, N_FLAG);
999 break;
1000 case CC_GT:
1001 cris_evaluate_flags(dc);
1002 {
1003 TCGv n, z;
1004
1005 n = tcg_temp_new();
1006 z = tcg_temp_new();
1007
1008 /* To avoid a shift we overlay everything on
1009 the V flag. */
1010 tcg_gen_shri_tl(n, cpu_PR[PR_CCS], 2);
1011 tcg_gen_shri_tl(z, cpu_PR[PR_CCS], 1);
1012 /* invert Z. */
1013 tcg_gen_xori_tl(z, z, 2);
1014
1015 tcg_gen_xor_tl(n, n, cpu_PR[PR_CCS]);
1016 tcg_gen_xori_tl(n, n, 2);
1017 tcg_gen_and_tl(cc, z, n);
1018 tcg_gen_andi_tl(cc, cc, 2);
1019
1020 tcg_temp_free(n);
1021 tcg_temp_free(z);
1022 }
1023 break;
1024 case CC_LE:
1025 cris_evaluate_flags(dc);
1026 {
1027 TCGv n, z;
1028
1029 n = tcg_temp_new();
1030 z = tcg_temp_new();
1031
1032 /* To avoid a shift we overlay everything on
1033 the V flag. */
1034 tcg_gen_shri_tl(n, cpu_PR[PR_CCS], 2);
1035 tcg_gen_shri_tl(z, cpu_PR[PR_CCS], 1);
1036
1037 tcg_gen_xor_tl(n, n, cpu_PR[PR_CCS]);
1038 tcg_gen_or_tl(cc, z, n);
1039 tcg_gen_andi_tl(cc, cc, 2);
1040
1041 tcg_temp_free(n);
1042 tcg_temp_free(z);
1043 }
1044 break;
1045 case CC_P:
1046 cris_evaluate_flags(dc);
1047 tcg_gen_andi_tl(cc, cpu_PR[PR_CCS], P_FLAG);
1048 break;
1049 case CC_A:
1050 tcg_gen_movi_tl(cc, 1);
1051 break;
1052 default:
1053 BUG();
1054 break;
1055 };
1056 }
1057
1058 static void cris_store_direct_jmp(DisasContext *dc)
1059 {
1060 /* Store the direct jmp state into the cpu-state. */
1061 if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
1062 if (dc->jmp == JMP_DIRECT) {
1063 tcg_gen_movi_tl(env_btaken, 1);
1064 }
1065 tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
1066 dc->jmp = JMP_INDIRECT;
1067 }
1068 }
1069
1070 static void cris_prepare_cc_branch (DisasContext *dc,
1071 int offset, int cond)
1072 {
1073 /* This helps us re-schedule the micro-code to insns in delay-slots
1074 before the actual jump. */
1075 dc->delayed_branch = 2;
1076 dc->jmp = JMP_DIRECT_CC;
1077 dc->jmp_pc = dc->pc + offset;
1078
1079 gen_tst_cc(dc, env_btaken, cond);
1080 tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
1081 }
1082
1083
1084 /* jumps, when the dest is in a live reg for example. Direct should be set
1085 when the dest addr is constant to allow tb chaining. */
1086 static inline void cris_prepare_jmp (DisasContext *dc, unsigned int type)
1087 {
1088 /* This helps us re-schedule the micro-code to insns in delay-slots
1089 before the actual jump. */
1090 dc->delayed_branch = 2;
1091 dc->jmp = type;
1092 if (type == JMP_INDIRECT) {
1093 tcg_gen_movi_tl(env_btaken, 1);
1094 }
1095 }
1096
1097 static void gen_load64(DisasContext *dc, TCGv_i64 dst, TCGv addr)
1098 {
1099 int mem_index = cpu_mmu_index(&dc->cpu->env, false);
1100
1101 /* If we get a fault on a delayslot we must keep the jmp state in
1102 the cpu-state to be able to re-execute the jmp. */
1103 if (dc->delayed_branch == 1) {
1104 cris_store_direct_jmp(dc);
1105 }
1106
1107 tcg_gen_qemu_ld_i64(dst, addr, mem_index, MO_TEQ);
1108 }
1109
1110 static void gen_load(DisasContext *dc, TCGv dst, TCGv addr,
1111 unsigned int size, int sign)
1112 {
1113 int mem_index = cpu_mmu_index(&dc->cpu->env, false);
1114
1115 /* If we get a fault on a delayslot we must keep the jmp state in
1116 the cpu-state to be able to re-execute the jmp. */
1117 if (dc->delayed_branch == 1) {
1118 cris_store_direct_jmp(dc);
1119 }
1120
1121 tcg_gen_qemu_ld_tl(dst, addr, mem_index,
1122 MO_TE + ctz32(size) + (sign ? MO_SIGN : 0));
1123 }
1124
1125 static void gen_store (DisasContext *dc, TCGv addr, TCGv val,
1126 unsigned int size)
1127 {
1128 int mem_index = cpu_mmu_index(&dc->cpu->env, false);
1129
1130 /* If we get a fault on a delayslot we must keep the jmp state in
1131 the cpu-state to be able to re-execute the jmp. */
1132 if (dc->delayed_branch == 1) {
1133 cris_store_direct_jmp(dc);
1134 }
1135
1136
1137 /* Conditional writes. We only support the kind were X and P are known
1138 at translation time. */
1139 if (dc->flagx_known && dc->flags_x && (dc->tb_flags & P_FLAG)) {
1140 dc->postinc = 0;
1141 cris_evaluate_flags(dc);
1142 tcg_gen_ori_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], C_FLAG);
1143 return;
1144 }
1145
1146 tcg_gen_qemu_st_tl(val, addr, mem_index, MO_TE + ctz32(size));
1147
1148 if (dc->flagx_known && dc->flags_x) {
1149 cris_evaluate_flags(dc);
1150 tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~C_FLAG);
1151 }
1152 }
1153
1154 static inline void t_gen_sext(TCGv d, TCGv s, int size)
1155 {
1156 if (size == 1) {
1157 tcg_gen_ext8s_i32(d, s);
1158 } else if (size == 2) {
1159 tcg_gen_ext16s_i32(d, s);
1160 } else if (!TCGV_EQUAL(d, s)) {
1161 tcg_gen_mov_tl(d, s);
1162 }
1163 }
1164
1165 static inline void t_gen_zext(TCGv d, TCGv s, int size)
1166 {
1167 if (size == 1) {
1168 tcg_gen_ext8u_i32(d, s);
1169 } else if (size == 2) {
1170 tcg_gen_ext16u_i32(d, s);
1171 } else if (!TCGV_EQUAL(d, s)) {
1172 tcg_gen_mov_tl(d, s);
1173 }
1174 }
1175
1176 #if DISAS_CRIS
1177 static char memsize_char(int size)
1178 {
1179 switch (size) {
1180 case 1: return 'b'; break;
1181 case 2: return 'w'; break;
1182 case 4: return 'd'; break;
1183 default:
1184 return 'x';
1185 break;
1186 }
1187 }
1188 #endif
1189
1190 static inline unsigned int memsize_z(DisasContext *dc)
1191 {
1192 return dc->zsize + 1;
1193 }
1194
1195 static inline unsigned int memsize_zz(DisasContext *dc)
1196 {
1197 switch (dc->zzsize) {
1198 case 0: return 1;
1199 case 1: return 2;
1200 default:
1201 return 4;
1202 }
1203 }
1204
1205 static inline void do_postinc (DisasContext *dc, int size)
1206 {
1207 if (dc->postinc) {
1208 tcg_gen_addi_tl(cpu_R[dc->op1], cpu_R[dc->op1], size);
1209 }
1210 }
1211
1212 static inline void dec_prep_move_r(DisasContext *dc, int rs, int rd,
1213 int size, int s_ext, TCGv dst)
1214 {
1215 if (s_ext) {
1216 t_gen_sext(dst, cpu_R[rs], size);
1217 } else {
1218 t_gen_zext(dst, cpu_R[rs], size);
1219 }
1220 }
1221
1222 /* Prepare T0 and T1 for a register alu operation.
1223 s_ext decides if the operand1 should be sign-extended or zero-extended when
1224 needed. */
1225 static void dec_prep_alu_r(DisasContext *dc, int rs, int rd,
1226 int size, int s_ext, TCGv dst, TCGv src)
1227 {
1228 dec_prep_move_r(dc, rs, rd, size, s_ext, src);
1229
1230 if (s_ext) {
1231 t_gen_sext(dst, cpu_R[rd], size);
1232 } else {
1233 t_gen_zext(dst, cpu_R[rd], size);
1234 }
1235 }
1236
1237 static int dec_prep_move_m(CPUCRISState *env, DisasContext *dc,
1238 int s_ext, int memsize, TCGv dst)
1239 {
1240 unsigned int rs;
1241 uint32_t imm;
1242 int is_imm;
1243 int insn_len = 2;
1244
1245 rs = dc->op1;
1246 is_imm = rs == 15 && dc->postinc;
1247
1248 /* Load [$rs] onto T1. */
1249 if (is_imm) {
1250 insn_len = 2 + memsize;
1251 if (memsize == 1) {
1252 insn_len++;
1253 }
1254
1255 imm = cris_fetch(env, dc, dc->pc + 2, memsize, s_ext);
1256 tcg_gen_movi_tl(dst, imm);
1257 dc->postinc = 0;
1258 } else {
1259 cris_flush_cc_state(dc);
1260 gen_load(dc, dst, cpu_R[rs], memsize, 0);
1261 if (s_ext) {
1262 t_gen_sext(dst, dst, memsize);
1263 } else {
1264 t_gen_zext(dst, dst, memsize);
1265 }
1266 }
1267 return insn_len;
1268 }
1269
1270 /* Prepare T0 and T1 for a memory + alu operation.
1271 s_ext decides if the operand1 should be sign-extended or zero-extended when
1272 needed. */
1273 static int dec_prep_alu_m(CPUCRISState *env, DisasContext *dc,
1274 int s_ext, int memsize, TCGv dst, TCGv src)
1275 {
1276 int insn_len;
1277
1278 insn_len = dec_prep_move_m(env, dc, s_ext, memsize, src);
1279 tcg_gen_mov_tl(dst, cpu_R[dc->op2]);
1280 return insn_len;
1281 }
1282
1283 #if DISAS_CRIS
1284 static const char *cc_name(int cc)
1285 {
1286 static const char *cc_names[16] = {
1287 "cc", "cs", "ne", "eq", "vc", "vs", "pl", "mi",
1288 "ls", "hi", "ge", "lt", "gt", "le", "a", "p"
1289 };
1290 assert(cc < 16);
1291 return cc_names[cc];
1292 }
1293 #endif
1294
1295 /* Start of insn decoders. */
1296
1297 static int dec_bccq(CPUCRISState *env, DisasContext *dc)
1298 {
1299 int32_t offset;
1300 int sign;
1301 uint32_t cond = dc->op2;
1302
1303 offset = EXTRACT_FIELD(dc->ir, 1, 7);
1304 sign = EXTRACT_FIELD(dc->ir, 0, 0);
1305
1306 offset *= 2;
1307 offset |= sign << 8;
1308 offset = sign_extend(offset, 8);
1309
1310 LOG_DIS("b%s %x\n", cc_name(cond), dc->pc + offset);
1311
1312 /* op2 holds the condition-code. */
1313 cris_cc_mask(dc, 0);
1314 cris_prepare_cc_branch(dc, offset, cond);
1315 return 2;
1316 }
1317 static int dec_addoq(CPUCRISState *env, DisasContext *dc)
1318 {
1319 int32_t imm;
1320
1321 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 7);
1322 imm = sign_extend(dc->op1, 7);
1323
1324 LOG_DIS("addoq %d, $r%u\n", imm, dc->op2);
1325 cris_cc_mask(dc, 0);
1326 /* Fetch register operand, */
1327 tcg_gen_addi_tl(cpu_R[R_ACR], cpu_R[dc->op2], imm);
1328
1329 return 2;
1330 }
1331 static int dec_addq(CPUCRISState *env, DisasContext *dc)
1332 {
1333 LOG_DIS("addq %u, $r%u\n", dc->op1, dc->op2);
1334
1335 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
1336
1337 cris_cc_mask(dc, CC_MASK_NZVC);
1338
1339 cris_alu(dc, CC_OP_ADD,
1340 cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(dc->op1), 4);
1341 return 2;
1342 }
1343 static int dec_moveq(CPUCRISState *env, DisasContext *dc)
1344 {
1345 uint32_t imm;
1346
1347 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
1348 imm = sign_extend(dc->op1, 5);
1349 LOG_DIS("moveq %d, $r%u\n", imm, dc->op2);
1350
1351 tcg_gen_movi_tl(cpu_R[dc->op2], imm);
1352 return 2;
1353 }
1354 static int dec_subq(CPUCRISState *env, DisasContext *dc)
1355 {
1356 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
1357
1358 LOG_DIS("subq %u, $r%u\n", dc->op1, dc->op2);
1359
1360 cris_cc_mask(dc, CC_MASK_NZVC);
1361 cris_alu(dc, CC_OP_SUB,
1362 cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(dc->op1), 4);
1363 return 2;
1364 }
1365 static int dec_cmpq(CPUCRISState *env, DisasContext *dc)
1366 {
1367 uint32_t imm;
1368 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
1369 imm = sign_extend(dc->op1, 5);
1370
1371 LOG_DIS("cmpq %d, $r%d\n", imm, dc->op2);
1372 cris_cc_mask(dc, CC_MASK_NZVC);
1373
1374 cris_alu(dc, CC_OP_CMP,
1375 cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(imm), 4);
1376 return 2;
1377 }
1378 static int dec_andq(CPUCRISState *env, DisasContext *dc)
1379 {
1380 uint32_t imm;
1381 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
1382 imm = sign_extend(dc->op1, 5);
1383
1384 LOG_DIS("andq %d, $r%d\n", imm, dc->op2);
1385 cris_cc_mask(dc, CC_MASK_NZ);
1386
1387 cris_alu(dc, CC_OP_AND,
1388 cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(imm), 4);
1389 return 2;
1390 }
1391 static int dec_orq(CPUCRISState *env, DisasContext *dc)
1392 {
1393 uint32_t imm;
1394 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
1395 imm = sign_extend(dc->op1, 5);
1396 LOG_DIS("orq %d, $r%d\n", imm, dc->op2);
1397 cris_cc_mask(dc, CC_MASK_NZ);
1398
1399 cris_alu(dc, CC_OP_OR,
1400 cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(imm), 4);
1401 return 2;
1402 }
1403 static int dec_btstq(CPUCRISState *env, DisasContext *dc)
1404 {
1405 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
1406 LOG_DIS("btstq %u, $r%d\n", dc->op1, dc->op2);
1407
1408 cris_cc_mask(dc, CC_MASK_NZ);
1409 cris_evaluate_flags(dc);
1410 gen_helper_btst(cpu_PR[PR_CCS], cpu_env, cpu_R[dc->op2],
1411 tcg_const_tl(dc->op1), cpu_PR[PR_CCS]);
1412 cris_alu(dc, CC_OP_MOVE,
1413 cpu_R[dc->op2], cpu_R[dc->op2], cpu_R[dc->op2], 4);
1414 cris_update_cc_op(dc, CC_OP_FLAGS, 4);
1415 dc->flags_uptodate = 1;
1416 return 2;
1417 }
1418 static int dec_asrq(CPUCRISState *env, DisasContext *dc)
1419 {
1420 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
1421 LOG_DIS("asrq %u, $r%d\n", dc->op1, dc->op2);
1422 cris_cc_mask(dc, CC_MASK_NZ);
1423
1424 tcg_gen_sari_tl(cpu_R[dc->op2], cpu_R[dc->op2], dc->op1);
1425 cris_alu(dc, CC_OP_MOVE,
1426 cpu_R[dc->op2],
1427 cpu_R[dc->op2], cpu_R[dc->op2], 4);
1428 return 2;
1429 }
1430 static int dec_lslq(CPUCRISState *env, DisasContext *dc)
1431 {
1432 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
1433 LOG_DIS("lslq %u, $r%d\n", dc->op1, dc->op2);
1434
1435 cris_cc_mask(dc, CC_MASK_NZ);
1436
1437 tcg_gen_shli_tl(cpu_R[dc->op2], cpu_R[dc->op2], dc->op1);
1438
1439 cris_alu(dc, CC_OP_MOVE,
1440 cpu_R[dc->op2],
1441 cpu_R[dc->op2], cpu_R[dc->op2], 4);
1442 return 2;
1443 }
1444 static int dec_lsrq(CPUCRISState *env, DisasContext *dc)
1445 {
1446 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
1447 LOG_DIS("lsrq %u, $r%d\n", dc->op1, dc->op2);
1448
1449 cris_cc_mask(dc, CC_MASK_NZ);
1450
1451 tcg_gen_shri_tl(cpu_R[dc->op2], cpu_R[dc->op2], dc->op1);
1452 cris_alu(dc, CC_OP_MOVE,
1453 cpu_R[dc->op2],
1454 cpu_R[dc->op2], cpu_R[dc->op2], 4);
1455 return 2;
1456 }
1457
1458 static int dec_move_r(CPUCRISState *env, DisasContext *dc)
1459 {
1460 int size = memsize_zz(dc);
1461
1462 LOG_DIS("move.%c $r%u, $r%u\n",
1463 memsize_char(size), dc->op1, dc->op2);
1464
1465 cris_cc_mask(dc, CC_MASK_NZ);
1466 if (size == 4) {
1467 dec_prep_move_r(dc, dc->op1, dc->op2, size, 0, cpu_R[dc->op2]);
1468 cris_cc_mask(dc, CC_MASK_NZ);
1469 cris_update_cc_op(dc, CC_OP_MOVE, 4);
1470 cris_update_cc_x(dc);
1471 cris_update_result(dc, cpu_R[dc->op2]);
1472 } else {
1473 TCGv t0;
1474
1475 t0 = tcg_temp_new();
1476 dec_prep_move_r(dc, dc->op1, dc->op2, size, 0, t0);
1477 cris_alu(dc, CC_OP_MOVE,
1478 cpu_R[dc->op2],
1479 cpu_R[dc->op2], t0, size);
1480 tcg_temp_free(t0);
1481 }
1482 return 2;
1483 }
1484
1485 static int dec_scc_r(CPUCRISState *env, DisasContext *dc)
1486 {
1487 int cond = dc->op2;
1488
1489 LOG_DIS("s%s $r%u\n",
1490 cc_name(cond), dc->op1);
1491
1492 gen_tst_cc(dc, cpu_R[dc->op1], cond);
1493 tcg_gen_setcondi_tl(TCG_COND_NE, cpu_R[dc->op1], cpu_R[dc->op1], 0);
1494
1495 cris_cc_mask(dc, 0);
1496 return 2;
1497 }
1498
1499 static inline void cris_alu_alloc_temps(DisasContext *dc, int size, TCGv *t)
1500 {
1501 if (size == 4) {
1502 t[0] = cpu_R[dc->op2];
1503 t[1] = cpu_R[dc->op1];
1504 } else {
1505 t[0] = tcg_temp_new();
1506 t[1] = tcg_temp_new();
1507 }
1508 }
1509
1510 static inline void cris_alu_free_temps(DisasContext *dc, int size, TCGv *t)
1511 {
1512 if (size != 4) {
1513 tcg_temp_free(t[0]);
1514 tcg_temp_free(t[1]);
1515 }
1516 }
1517
1518 static int dec_and_r(CPUCRISState *env, DisasContext *dc)
1519 {
1520 TCGv t[2];
1521 int size = memsize_zz(dc);
1522
1523 LOG_DIS("and.%c $r%u, $r%u\n",
1524 memsize_char(size), dc->op1, dc->op2);
1525
1526 cris_cc_mask(dc, CC_MASK_NZ);
1527
1528 cris_alu_alloc_temps(dc, size, t);
1529 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1530 cris_alu(dc, CC_OP_AND, cpu_R[dc->op2], t[0], t[1], size);
1531 cris_alu_free_temps(dc, size, t);
1532 return 2;
1533 }
1534
1535 static int dec_lz_r(CPUCRISState *env, DisasContext *dc)
1536 {
1537 TCGv t0;
1538 LOG_DIS("lz $r%u, $r%u\n",
1539 dc->op1, dc->op2);
1540 cris_cc_mask(dc, CC_MASK_NZ);
1541 t0 = tcg_temp_new();
1542 dec_prep_alu_r(dc, dc->op1, dc->op2, 4, 0, cpu_R[dc->op2], t0);
1543 cris_alu(dc, CC_OP_LZ, cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
1544 tcg_temp_free(t0);
1545 return 2;
1546 }
1547
1548 static int dec_lsl_r(CPUCRISState *env, DisasContext *dc)
1549 {
1550 TCGv t[2];
1551 int size = memsize_zz(dc);
1552
1553 LOG_DIS("lsl.%c $r%u, $r%u\n",
1554 memsize_char(size), dc->op1, dc->op2);
1555
1556 cris_cc_mask(dc, CC_MASK_NZ);
1557 cris_alu_alloc_temps(dc, size, t);
1558 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1559 tcg_gen_andi_tl(t[1], t[1], 63);
1560 cris_alu(dc, CC_OP_LSL, cpu_R[dc->op2], t[0], t[1], size);
1561 cris_alu_alloc_temps(dc, size, t);
1562 return 2;
1563 }
1564
1565 static int dec_lsr_r(CPUCRISState *env, DisasContext *dc)
1566 {
1567 TCGv t[2];
1568 int size = memsize_zz(dc);
1569
1570 LOG_DIS("lsr.%c $r%u, $r%u\n",
1571 memsize_char(size), dc->op1, dc->op2);
1572
1573 cris_cc_mask(dc, CC_MASK_NZ);
1574 cris_alu_alloc_temps(dc, size, t);
1575 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1576 tcg_gen_andi_tl(t[1], t[1], 63);
1577 cris_alu(dc, CC_OP_LSR, cpu_R[dc->op2], t[0], t[1], size);
1578 cris_alu_free_temps(dc, size, t);
1579 return 2;
1580 }
1581
1582 static int dec_asr_r(CPUCRISState *env, DisasContext *dc)
1583 {
1584 TCGv t[2];
1585 int size = memsize_zz(dc);
1586
1587 LOG_DIS("asr.%c $r%u, $r%u\n",
1588 memsize_char(size), dc->op1, dc->op2);
1589
1590 cris_cc_mask(dc, CC_MASK_NZ);
1591 cris_alu_alloc_temps(dc, size, t);
1592 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 1, t[0], t[1]);
1593 tcg_gen_andi_tl(t[1], t[1], 63);
1594 cris_alu(dc, CC_OP_ASR, cpu_R[dc->op2], t[0], t[1], size);
1595 cris_alu_free_temps(dc, size, t);
1596 return 2;
1597 }
1598
1599 static int dec_muls_r(CPUCRISState *env, DisasContext *dc)
1600 {
1601 TCGv t[2];
1602 int size = memsize_zz(dc);
1603
1604 LOG_DIS("muls.%c $r%u, $r%u\n",
1605 memsize_char(size), dc->op1, dc->op2);
1606 cris_cc_mask(dc, CC_MASK_NZV);
1607 cris_alu_alloc_temps(dc, size, t);
1608 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 1, t[0], t[1]);
1609
1610 cris_alu(dc, CC_OP_MULS, cpu_R[dc->op2], t[0], t[1], 4);
1611 cris_alu_free_temps(dc, size, t);
1612 return 2;
1613 }
1614
1615 static int dec_mulu_r(CPUCRISState *env, DisasContext *dc)
1616 {
1617 TCGv t[2];
1618 int size = memsize_zz(dc);
1619
1620 LOG_DIS("mulu.%c $r%u, $r%u\n",
1621 memsize_char(size), dc->op1, dc->op2);
1622 cris_cc_mask(dc, CC_MASK_NZV);
1623 cris_alu_alloc_temps(dc, size, t);
1624 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1625
1626 cris_alu(dc, CC_OP_MULU, cpu_R[dc->op2], t[0], t[1], 4);
1627 cris_alu_alloc_temps(dc, size, t);
1628 return 2;
1629 }
1630
1631
1632 static int dec_dstep_r(CPUCRISState *env, DisasContext *dc)
1633 {
1634 LOG_DIS("dstep $r%u, $r%u\n", dc->op1, dc->op2);
1635 cris_cc_mask(dc, CC_MASK_NZ);
1636 cris_alu(dc, CC_OP_DSTEP,
1637 cpu_R[dc->op2], cpu_R[dc->op2], cpu_R[dc->op1], 4);
1638 return 2;
1639 }
1640
1641 static int dec_xor_r(CPUCRISState *env, DisasContext *dc)
1642 {
1643 TCGv t[2];
1644 int size = memsize_zz(dc);
1645 LOG_DIS("xor.%c $r%u, $r%u\n",
1646 memsize_char(size), dc->op1, dc->op2);
1647 BUG_ON(size != 4); /* xor is dword. */
1648 cris_cc_mask(dc, CC_MASK_NZ);
1649 cris_alu_alloc_temps(dc, size, t);
1650 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1651
1652 cris_alu(dc, CC_OP_XOR, cpu_R[dc->op2], t[0], t[1], 4);
1653 cris_alu_free_temps(dc, size, t);
1654 return 2;
1655 }
1656
1657 static int dec_bound_r(CPUCRISState *env, DisasContext *dc)
1658 {
1659 TCGv l0;
1660 int size = memsize_zz(dc);
1661 LOG_DIS("bound.%c $r%u, $r%u\n",
1662 memsize_char(size), dc->op1, dc->op2);
1663 cris_cc_mask(dc, CC_MASK_NZ);
1664 l0 = tcg_temp_local_new();
1665 dec_prep_move_r(dc, dc->op1, dc->op2, size, 0, l0);
1666 cris_alu(dc, CC_OP_BOUND, cpu_R[dc->op2], cpu_R[dc->op2], l0, 4);
1667 tcg_temp_free(l0);
1668 return 2;
1669 }
1670
1671 static int dec_cmp_r(CPUCRISState *env, DisasContext *dc)
1672 {
1673 TCGv t[2];
1674 int size = memsize_zz(dc);
1675 LOG_DIS("cmp.%c $r%u, $r%u\n",
1676 memsize_char(size), dc->op1, dc->op2);
1677 cris_cc_mask(dc, CC_MASK_NZVC);
1678 cris_alu_alloc_temps(dc, size, t);
1679 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1680
1681 cris_alu(dc, CC_OP_CMP, cpu_R[dc->op2], t[0], t[1], size);
1682 cris_alu_free_temps(dc, size, t);
1683 return 2;
1684 }
1685
1686 static int dec_abs_r(CPUCRISState *env, DisasContext *dc)
1687 {
1688 TCGv t0;
1689
1690 LOG_DIS("abs $r%u, $r%u\n",
1691 dc->op1, dc->op2);
1692 cris_cc_mask(dc, CC_MASK_NZ);
1693
1694 t0 = tcg_temp_new();
1695 tcg_gen_sari_tl(t0, cpu_R[dc->op1], 31);
1696 tcg_gen_xor_tl(cpu_R[dc->op2], cpu_R[dc->op1], t0);
1697 tcg_gen_sub_tl(cpu_R[dc->op2], cpu_R[dc->op2], t0);
1698 tcg_temp_free(t0);
1699
1700 cris_alu(dc, CC_OP_MOVE,
1701 cpu_R[dc->op2], cpu_R[dc->op2], cpu_R[dc->op2], 4);
1702 return 2;
1703 }
1704
1705 static int dec_add_r(CPUCRISState *env, DisasContext *dc)
1706 {
1707 TCGv t[2];
1708 int size = memsize_zz(dc);
1709 LOG_DIS("add.%c $r%u, $r%u\n",
1710 memsize_char(size), dc->op1, dc->op2);
1711 cris_cc_mask(dc, CC_MASK_NZVC);
1712 cris_alu_alloc_temps(dc, size, t);
1713 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1714
1715 cris_alu(dc, CC_OP_ADD, cpu_R[dc->op2], t[0], t[1], size);
1716 cris_alu_free_temps(dc, size, t);
1717 return 2;
1718 }
1719
1720 static int dec_addc_r(CPUCRISState *env, DisasContext *dc)
1721 {
1722 LOG_DIS("addc $r%u, $r%u\n",
1723 dc->op1, dc->op2);
1724 cris_evaluate_flags(dc);
1725 /* Set for this insn. */
1726 dc->flagx_known = 1;
1727 dc->flags_x = X_FLAG;
1728
1729 cris_cc_mask(dc, CC_MASK_NZVC);
1730 cris_alu(dc, CC_OP_ADDC,
1731 cpu_R[dc->op2], cpu_R[dc->op2], cpu_R[dc->op1], 4);
1732 return 2;
1733 }
1734
1735 static int dec_mcp_r(CPUCRISState *env, DisasContext *dc)
1736 {
1737 LOG_DIS("mcp $p%u, $r%u\n",
1738 dc->op2, dc->op1);
1739 cris_evaluate_flags(dc);
1740 cris_cc_mask(dc, CC_MASK_RNZV);
1741 cris_alu(dc, CC_OP_MCP,
1742 cpu_R[dc->op1], cpu_R[dc->op1], cpu_PR[dc->op2], 4);
1743 return 2;
1744 }
1745
1746 #if DISAS_CRIS
1747 static char * swapmode_name(int mode, char *modename) {
1748 int i = 0;
1749 if (mode & 8) {
1750 modename[i++] = 'n';
1751 }
1752 if (mode & 4) {
1753 modename[i++] = 'w';
1754 }
1755 if (mode & 2) {
1756 modename[i++] = 'b';
1757 }
1758 if (mode & 1) {
1759 modename[i++] = 'r';
1760 }
1761 modename[i++] = 0;
1762 return modename;
1763 }
1764 #endif
1765
1766 static int dec_swap_r(CPUCRISState *env, DisasContext *dc)
1767 {
1768 TCGv t0;
1769 #if DISAS_CRIS
1770 char modename[4];
1771 #endif
1772 LOG_DIS("swap%s $r%u\n",
1773 swapmode_name(dc->op2, modename), dc->op1);
1774
1775 cris_cc_mask(dc, CC_MASK_NZ);
1776 t0 = tcg_temp_new();
1777 tcg_gen_mov_tl(t0, cpu_R[dc->op1]);
1778 if (dc->op2 & 8) {
1779 tcg_gen_not_tl(t0, t0);
1780 }
1781 if (dc->op2 & 4) {
1782 t_gen_swapw(t0, t0);
1783 }
1784 if (dc->op2 & 2) {
1785 t_gen_swapb(t0, t0);
1786 }
1787 if (dc->op2 & 1) {
1788 t_gen_swapr(t0, t0);
1789 }
1790 cris_alu(dc, CC_OP_MOVE, cpu_R[dc->op1], cpu_R[dc->op1], t0, 4);
1791 tcg_temp_free(t0);
1792 return 2;
1793 }
1794
1795 static int dec_or_r(CPUCRISState *env, DisasContext *dc)
1796 {
1797 TCGv t[2];
1798 int size = memsize_zz(dc);
1799 LOG_DIS("or.%c $r%u, $r%u\n",
1800 memsize_char(size), dc->op1, dc->op2);
1801 cris_cc_mask(dc, CC_MASK_NZ);
1802 cris_alu_alloc_temps(dc, size, t);
1803 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1804 cris_alu(dc, CC_OP_OR, cpu_R[dc->op2], t[0], t[1], size);
1805 cris_alu_free_temps(dc, size, t);
1806 return 2;
1807 }
1808
1809 static int dec_addi_r(CPUCRISState *env, DisasContext *dc)
1810 {
1811 TCGv t0;
1812 LOG_DIS("addi.%c $r%u, $r%u\n",
1813 memsize_char(memsize_zz(dc)), dc->op2, dc->op1);
1814 cris_cc_mask(dc, 0);
1815 t0 = tcg_temp_new();
1816 tcg_gen_shl_tl(t0, cpu_R[dc->op2], tcg_const_tl(dc->zzsize));
1817 tcg_gen_add_tl(cpu_R[dc->op1], cpu_R[dc->op1], t0);
1818 tcg_temp_free(t0);
1819 return 2;
1820 }
1821
1822 static int dec_addi_acr(CPUCRISState *env, DisasContext *dc)
1823 {
1824 TCGv t0;
1825 LOG_DIS("addi.%c $r%u, $r%u, $acr\n",
1826 memsize_char(memsize_zz(dc)), dc->op2, dc->op1);
1827 cris_cc_mask(dc, 0);
1828 t0 = tcg_temp_new();
1829 tcg_gen_shl_tl(t0, cpu_R[dc->op2], tcg_const_tl(dc->zzsize));
1830 tcg_gen_add_tl(cpu_R[R_ACR], cpu_R[dc->op1], t0);
1831 tcg_temp_free(t0);
1832 return 2;
1833 }
1834
1835 static int dec_neg_r(CPUCRISState *env, DisasContext *dc)
1836 {
1837 TCGv t[2];
1838 int size = memsize_zz(dc);
1839 LOG_DIS("neg.%c $r%u, $r%u\n",
1840 memsize_char(size), dc->op1, dc->op2);
1841 cris_cc_mask(dc, CC_MASK_NZVC);
1842 cris_alu_alloc_temps(dc, size, t);
1843 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1844
1845 cris_alu(dc, CC_OP_NEG, cpu_R[dc->op2], t[0], t[1], size);
1846 cris_alu_free_temps(dc, size, t);
1847 return 2;
1848 }
1849
1850 static int dec_btst_r(CPUCRISState *env, DisasContext *dc)
1851 {
1852 LOG_DIS("btst $r%u, $r%u\n",
1853 dc->op1, dc->op2);
1854 cris_cc_mask(dc, CC_MASK_NZ);
1855 cris_evaluate_flags(dc);
1856 gen_helper_btst(cpu_PR[PR_CCS], cpu_env, cpu_R[dc->op2],
1857 cpu_R[dc->op1], cpu_PR[PR_CCS]);
1858 cris_alu(dc, CC_OP_MOVE, cpu_R[dc->op2],
1859 cpu_R[dc->op2], cpu_R[dc->op2], 4);
1860 cris_update_cc_op(dc, CC_OP_FLAGS, 4);
1861 dc->flags_uptodate = 1;
1862 return 2;
1863 }
1864
1865 static int dec_sub_r(CPUCRISState *env, DisasContext *dc)
1866 {
1867 TCGv t[2];
1868 int size = memsize_zz(dc);
1869 LOG_DIS("sub.%c $r%u, $r%u\n",
1870 memsize_char(size), dc->op1, dc->op2);
1871 cris_cc_mask(dc, CC_MASK_NZVC);
1872 cris_alu_alloc_temps(dc, size, t);
1873 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1874 cris_alu(dc, CC_OP_SUB, cpu_R[dc->op2], t[0], t[1], size);
1875 cris_alu_free_temps(dc, size, t);
1876 return 2;
1877 }
1878
1879 /* Zero extension. From size to dword. */
1880 static int dec_movu_r(CPUCRISState *env, DisasContext *dc)
1881 {
1882 TCGv t0;
1883 int size = memsize_z(dc);
1884 LOG_DIS("movu.%c $r%u, $r%u\n",
1885 memsize_char(size),
1886 dc->op1, dc->op2);
1887
1888 cris_cc_mask(dc, CC_MASK_NZ);
1889 t0 = tcg_temp_new();
1890 dec_prep_move_r(dc, dc->op1, dc->op2, size, 0, t0);
1891 cris_alu(dc, CC_OP_MOVE, cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
1892 tcg_temp_free(t0);
1893 return 2;
1894 }
1895
1896 /* Sign extension. From size to dword. */
1897 static int dec_movs_r(CPUCRISState *env, DisasContext *dc)
1898 {
1899 TCGv t0;
1900 int size = memsize_z(dc);
1901 LOG_DIS("movs.%c $r%u, $r%u\n",
1902 memsize_char(size),
1903 dc->op1, dc->op2);
1904
1905 cris_cc_mask(dc, CC_MASK_NZ);
1906 t0 = tcg_temp_new();
1907 /* Size can only be qi or hi. */
1908 t_gen_sext(t0, cpu_R[dc->op1], size);
1909 cris_alu(dc, CC_OP_MOVE,
1910 cpu_R[dc->op2], cpu_R[dc->op1], t0, 4);
1911 tcg_temp_free(t0);
1912 return 2;
1913 }
1914
1915 /* zero extension. From size to dword. */
1916 static int dec_addu_r(CPUCRISState *env, DisasContext *dc)
1917 {
1918 TCGv t0;
1919 int size = memsize_z(dc);
1920 LOG_DIS("addu.%c $r%u, $r%u\n",
1921 memsize_char(size),
1922 dc->op1, dc->op2);
1923
1924 cris_cc_mask(dc, CC_MASK_NZVC);
1925 t0 = tcg_temp_new();
1926 /* Size can only be qi or hi. */
1927 t_gen_zext(t0, cpu_R[dc->op1], size);
1928 cris_alu(dc, CC_OP_ADD, cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
1929 tcg_temp_free(t0);
1930 return 2;
1931 }
1932
1933 /* Sign extension. From size to dword. */
1934 static int dec_adds_r(CPUCRISState *env, DisasContext *dc)
1935 {
1936 TCGv t0;
1937 int size = memsize_z(dc);
1938 LOG_DIS("adds.%c $r%u, $r%u\n",
1939 memsize_char(size),
1940 dc->op1, dc->op2);
1941
1942 cris_cc_mask(dc, CC_MASK_NZVC);
1943 t0 = tcg_temp_new();
1944 /* Size can only be qi or hi. */
1945 t_gen_sext(t0, cpu_R[dc->op1], size);
1946 cris_alu(dc, CC_OP_ADD,
1947 cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
1948 tcg_temp_free(t0);
1949 return 2;
1950 }
1951
1952 /* Zero extension. From size to dword. */
1953 static int dec_subu_r(CPUCRISState *env, DisasContext *dc)
1954 {
1955 TCGv t0;
1956 int size = memsize_z(dc);
1957 LOG_DIS("subu.%c $r%u, $r%u\n",
1958 memsize_char(size),
1959 dc->op1, dc->op2);
1960
1961 cris_cc_mask(dc, CC_MASK_NZVC);
1962 t0 = tcg_temp_new();
1963 /* Size can only be qi or hi. */
1964 t_gen_zext(t0, cpu_R[dc->op1], size);
1965 cris_alu(dc, CC_OP_SUB,
1966 cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
1967 tcg_temp_free(t0);
1968 return 2;
1969 }
1970
1971 /* Sign extension. From size to dword. */
1972 static int dec_subs_r(CPUCRISState *env, DisasContext *dc)
1973 {
1974 TCGv t0;
1975 int size = memsize_z(dc);
1976 LOG_DIS("subs.%c $r%u, $r%u\n",
1977 memsize_char(size),
1978 dc->op1, dc->op2);
1979
1980 cris_cc_mask(dc, CC_MASK_NZVC);
1981 t0 = tcg_temp_new();
1982 /* Size can only be qi or hi. */
1983 t_gen_sext(t0, cpu_R[dc->op1], size);
1984 cris_alu(dc, CC_OP_SUB,
1985 cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
1986 tcg_temp_free(t0);
1987 return 2;
1988 }
1989
1990 static int dec_setclrf(CPUCRISState *env, DisasContext *dc)
1991 {
1992 uint32_t flags;
1993 int set = (~dc->opcode >> 2) & 1;
1994
1995
1996 flags = (EXTRACT_FIELD(dc->ir, 12, 15) << 4)
1997 | EXTRACT_FIELD(dc->ir, 0, 3);
1998 if (set && flags == 0) {
1999 LOG_DIS("nop\n");
2000 return 2;
2001 } else if (!set && (flags & 0x20)) {
2002 LOG_DIS("di\n");
2003 } else {
2004 LOG_DIS("%sf %x\n", set ? "set" : "clr", flags);
2005 }
2006
2007 /* User space is not allowed to touch these. Silently ignore. */
2008 if (dc->tb_flags & U_FLAG) {
2009 flags &= ~(S_FLAG | I_FLAG | U_FLAG);
2010 }
2011
2012 if (flags & X_FLAG) {
2013 dc->flagx_known = 1;
2014 if (set) {
2015 dc->flags_x = X_FLAG;
2016 } else {
2017 dc->flags_x = 0;
2018 }
2019 }
2020
2021 /* Break the TB if any of the SPI flag changes. */
2022 if (flags & (P_FLAG | S_FLAG)) {
2023 tcg_gen_movi_tl(env_pc, dc->pc + 2);
2024 dc->is_jmp = DISAS_UPDATE;
2025 dc->cpustate_changed = 1;
2026 }
2027
2028 /* For the I flag, only act on posedge. */
2029 if ((flags & I_FLAG)) {
2030 tcg_gen_movi_tl(env_pc, dc->pc + 2);
2031 dc->is_jmp = DISAS_UPDATE;
2032 dc->cpustate_changed = 1;
2033 }
2034
2035
2036 /* Simply decode the flags. */
2037 cris_evaluate_flags(dc);
2038 cris_update_cc_op(dc, CC_OP_FLAGS, 4);
2039 cris_update_cc_x(dc);
2040 tcg_gen_movi_tl(cc_op, dc->cc_op);
2041
2042 if (set) {
2043 if (!(dc->tb_flags & U_FLAG) && (flags & U_FLAG)) {
2044 /* Enter user mode. */
2045 t_gen_mov_env_TN(ksp, cpu_R[R_SP]);
2046 tcg_gen_mov_tl(cpu_R[R_SP], cpu_PR[PR_USP]);
2047 dc->cpustate_changed = 1;
2048 }
2049 tcg_gen_ori_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], flags);
2050 } else {
2051 tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~flags);
2052 }
2053
2054 dc->flags_uptodate = 1;
2055 dc->clear_x = 0;
2056 return 2;
2057 }
2058
2059 static int dec_move_rs(CPUCRISState *env, DisasContext *dc)
2060 {
2061 LOG_DIS("move $r%u, $s%u\n", dc->op1, dc->op2);
2062 cris_cc_mask(dc, 0);
2063 gen_helper_movl_sreg_reg(cpu_env, tcg_const_tl(dc->op2),
2064 tcg_const_tl(dc->op1));
2065 return 2;
2066 }
2067 static int dec_move_sr(CPUCRISState *env, DisasContext *dc)
2068 {
2069 LOG_DIS("move $s%u, $r%u\n", dc->op2, dc->op1);
2070 cris_cc_mask(dc, 0);
2071 gen_helper_movl_reg_sreg(cpu_env, tcg_const_tl(dc->op1),
2072 tcg_const_tl(dc->op2));
2073 return 2;
2074 }
2075
2076 static int dec_move_rp(CPUCRISState *env, DisasContext *dc)
2077 {
2078 TCGv t[2];
2079 LOG_DIS("move $r%u, $p%u\n", dc->op1, dc->op2);
2080 cris_cc_mask(dc, 0);
2081
2082 t[0] = tcg_temp_new();
2083 if (dc->op2 == PR_CCS) {
2084 cris_evaluate_flags(dc);
2085 tcg_gen_mov_tl(t[0], cpu_R[dc->op1]);
2086 if (dc->tb_flags & U_FLAG) {
2087 t[1] = tcg_temp_new();
2088 /* User space is not allowed to touch all flags. */
2089 tcg_gen_andi_tl(t[0], t[0], 0x39f);
2090 tcg_gen_andi_tl(t[1], cpu_PR[PR_CCS], ~0x39f);
2091 tcg_gen_or_tl(t[0], t[1], t[0]);
2092 tcg_temp_free(t[1]);
2093 }
2094 } else {
2095 tcg_gen_mov_tl(t[0], cpu_R[dc->op1]);
2096 }
2097
2098 t_gen_mov_preg_TN(dc, dc->op2, t[0]);
2099 if (dc->op2 == PR_CCS) {
2100 cris_update_cc_op(dc, CC_OP_FLAGS, 4);
2101 dc->flags_uptodate = 1;
2102 }
2103 tcg_temp_free(t[0]);
2104 return 2;
2105 }
2106 static int dec_move_pr(CPUCRISState *env, DisasContext *dc)
2107 {
2108 TCGv t0;
2109 LOG_DIS("move $p%u, $r%u\n", dc->op2, dc->op1);
2110 cris_cc_mask(dc, 0);
2111
2112 if (dc->op2 == PR_CCS) {
2113 cris_evaluate_flags(dc);
2114 }
2115
2116 if (dc->op2 == PR_DZ) {
2117 tcg_gen_movi_tl(cpu_R[dc->op1], 0);
2118 } else {
2119 t0 = tcg_temp_new();
2120 t_gen_mov_TN_preg(t0, dc->op2);
2121 cris_alu(dc, CC_OP_MOVE,
2122 cpu_R[dc->op1], cpu_R[dc->op1], t0,
2123 preg_sizes[dc->op2]);
2124 tcg_temp_free(t0);
2125 }
2126 return 2;
2127 }
2128
2129 static int dec_move_mr(CPUCRISState *env, DisasContext *dc)
2130 {
2131 int memsize = memsize_zz(dc);
2132 int insn_len;
2133 LOG_DIS("move.%c [$r%u%s, $r%u\n",
2134 memsize_char(memsize),
2135 dc->op1, dc->postinc ? "+]" : "]",
2136 dc->op2);
2137
2138 if (memsize == 4) {
2139 insn_len = dec_prep_move_m(env, dc, 0, 4, cpu_R[dc->op2]);
2140 cris_cc_mask(dc, CC_MASK_NZ);
2141 cris_update_cc_op(dc, CC_OP_MOVE, 4);
2142 cris_update_cc_x(dc);
2143 cris_update_result(dc, cpu_R[dc->op2]);
2144 } else {
2145 TCGv t0;
2146
2147 t0 = tcg_temp_new();
2148 insn_len = dec_prep_move_m(env, dc, 0, memsize, t0);
2149 cris_cc_mask(dc, CC_MASK_NZ);
2150 cris_alu(dc, CC_OP_MOVE,
2151 cpu_R[dc->op2], cpu_R[dc->op2], t0, memsize);
2152 tcg_temp_free(t0);
2153 }
2154 do_postinc(dc, memsize);
2155 return insn_len;
2156 }
2157
2158 static inline void cris_alu_m_alloc_temps(TCGv *t)
2159 {
2160 t[0] = tcg_temp_new();
2161 t[1] = tcg_temp_new();
2162 }
2163
2164 static inline void cris_alu_m_free_temps(TCGv *t)
2165 {
2166 tcg_temp_free(t[0]);
2167 tcg_temp_free(t[1]);
2168 }
2169
2170 static int dec_movs_m(CPUCRISState *env, DisasContext *dc)
2171 {
2172 TCGv t[2];
2173 int memsize = memsize_z(dc);
2174 int insn_len;
2175 LOG_DIS("movs.%c [$r%u%s, $r%u\n",
2176 memsize_char(memsize),
2177 dc->op1, dc->postinc ? "+]" : "]",
2178 dc->op2);
2179
2180 cris_alu_m_alloc_temps(t);
2181 /* sign extend. */
2182 insn_len = dec_prep_alu_m(env, dc, 1, memsize, t[0], t[1]);
2183 cris_cc_mask(dc, CC_MASK_NZ);
2184 cris_alu(dc, CC_OP_MOVE,
2185 cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2186 do_postinc(dc, memsize);
2187 cris_alu_m_free_temps(t);
2188 return insn_len;
2189 }
2190
2191 static int dec_addu_m(CPUCRISState *env, DisasContext *dc)
2192 {
2193 TCGv t[2];
2194 int memsize = memsize_z(dc);
2195 int insn_len;
2196 LOG_DIS("addu.%c [$r%u%s, $r%u\n",
2197 memsize_char(memsize),
2198 dc->op1, dc->postinc ? "+]" : "]",
2199 dc->op2);
2200
2201 cris_alu_m_alloc_temps(t);
2202 /* sign extend. */
2203 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2204 cris_cc_mask(dc, CC_MASK_NZVC);
2205 cris_alu(dc, CC_OP_ADD,
2206 cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2207 do_postinc(dc, memsize);
2208 cris_alu_m_free_temps(t);
2209 return insn_len;
2210 }
2211
2212 static int dec_adds_m(CPUCRISState *env, DisasContext *dc)
2213 {
2214 TCGv t[2];
2215 int memsize = memsize_z(dc);
2216 int insn_len;
2217 LOG_DIS("adds.%c [$r%u%s, $r%u\n",
2218 memsize_char(memsize),
2219 dc->op1, dc->postinc ? "+]" : "]",
2220 dc->op2);
2221
2222 cris_alu_m_alloc_temps(t);
2223 /* sign extend. */
2224 insn_len = dec_prep_alu_m(env, dc, 1, memsize, t[0], t[1]);
2225 cris_cc_mask(dc, CC_MASK_NZVC);
2226 cris_alu(dc, CC_OP_ADD, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2227 do_postinc(dc, memsize);
2228 cris_alu_m_free_temps(t);
2229 return insn_len;
2230 }
2231
2232 static int dec_subu_m(CPUCRISState *env, DisasContext *dc)
2233 {
2234 TCGv t[2];
2235 int memsize = memsize_z(dc);
2236 int insn_len;
2237 LOG_DIS("subu.%c [$r%u%s, $r%u\n",
2238 memsize_char(memsize),
2239 dc->op1, dc->postinc ? "+]" : "]",
2240 dc->op2);
2241
2242 cris_alu_m_alloc_temps(t);
2243 /* sign extend. */
2244 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2245 cris_cc_mask(dc, CC_MASK_NZVC);
2246 cris_alu(dc, CC_OP_SUB, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2247 do_postinc(dc, memsize);
2248 cris_alu_m_free_temps(t);
2249 return insn_len;
2250 }
2251
2252 static int dec_subs_m(CPUCRISState *env, DisasContext *dc)
2253 {
2254 TCGv t[2];
2255 int memsize = memsize_z(dc);
2256 int insn_len;
2257 LOG_DIS("subs.%c [$r%u%s, $r%u\n",
2258 memsize_char(memsize),
2259 dc->op1, dc->postinc ? "+]" : "]",
2260 dc->op2);
2261
2262 cris_alu_m_alloc_temps(t);
2263 /* sign extend. */
2264 insn_len = dec_prep_alu_m(env, dc, 1, memsize, t[0], t[1]);
2265 cris_cc_mask(dc, CC_MASK_NZVC);
2266 cris_alu(dc, CC_OP_SUB, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2267 do_postinc(dc, memsize);
2268 cris_alu_m_free_temps(t);
2269 return insn_len;
2270 }
2271
2272 static int dec_movu_m(CPUCRISState *env, DisasContext *dc)
2273 {
2274 TCGv t[2];
2275 int memsize = memsize_z(dc);
2276 int insn_len;
2277
2278 LOG_DIS("movu.%c [$r%u%s, $r%u\n",
2279 memsize_char(memsize),
2280 dc->op1, dc->postinc ? "+]" : "]",
2281 dc->op2);
2282
2283 cris_alu_m_alloc_temps(t);
2284 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2285 cris_cc_mask(dc, CC_MASK_NZ);
2286 cris_alu(dc, CC_OP_MOVE, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2287 do_postinc(dc, memsize);
2288 cris_alu_m_free_temps(t);
2289 return insn_len;
2290 }
2291
2292 static int dec_cmpu_m(CPUCRISState *env, DisasContext *dc)
2293 {
2294 TCGv t[2];
2295 int memsize = memsize_z(dc);
2296 int insn_len;
2297 LOG_DIS("cmpu.%c [$r%u%s, $r%u\n",
2298 memsize_char(memsize),
2299 dc->op1, dc->postinc ? "+]" : "]",
2300 dc->op2);
2301
2302 cris_alu_m_alloc_temps(t);
2303 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2304 cris_cc_mask(dc, CC_MASK_NZVC);
2305 cris_alu(dc, CC_OP_CMP, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2306 do_postinc(dc, memsize);
2307 cris_alu_m_free_temps(t);
2308 return insn_len;
2309 }
2310
2311 static int dec_cmps_m(CPUCRISState *env, DisasContext *dc)
2312 {
2313 TCGv t[2];
2314 int memsize = memsize_z(dc);
2315 int insn_len;
2316 LOG_DIS("cmps.%c [$r%u%s, $r%u\n",
2317 memsize_char(memsize),
2318 dc->op1, dc->postinc ? "+]" : "]",
2319 dc->op2);
2320
2321 cris_alu_m_alloc_temps(t);
2322 insn_len = dec_prep_alu_m(env, dc, 1, memsize, t[0], t[1]);
2323 cris_cc_mask(dc, CC_MASK_NZVC);
2324 cris_alu(dc, CC_OP_CMP,
2325 cpu_R[dc->op2], cpu_R[dc->op2], t[1],
2326 memsize_zz(dc));
2327 do_postinc(dc, memsize);
2328 cris_alu_m_free_temps(t);
2329 return insn_len;
2330 }
2331
2332 static int dec_cmp_m(CPUCRISState *env, DisasContext *dc)
2333 {
2334 TCGv t[2];
2335 int memsize = memsize_zz(dc);
2336 int insn_len;
2337 LOG_DIS("cmp.%c [$r%u%s, $r%u\n",
2338 memsize_char(memsize),
2339 dc->op1, dc->postinc ? "+]" : "]",
2340 dc->op2);
2341
2342 cris_alu_m_alloc_temps(t);
2343 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2344 cris_cc_mask(dc, CC_MASK_NZVC);
2345 cris_alu(dc, CC_OP_CMP,
2346 cpu_R[dc->op2], cpu_R[dc->op2], t[1],
2347 memsize_zz(dc));
2348 do_postinc(dc, memsize);
2349 cris_alu_m_free_temps(t);
2350 return insn_len;
2351 }
2352
2353 static int dec_test_m(CPUCRISState *env, DisasContext *dc)
2354 {
2355 TCGv t[2];
2356 int memsize = memsize_zz(dc);
2357 int insn_len;
2358 LOG_DIS("test.%c [$r%u%s] op2=%x\n",
2359 memsize_char(memsize),
2360 dc->op1, dc->postinc ? "+]" : "]",
2361 dc->op2);
2362
2363 cris_evaluate_flags(dc);
2364
2365 cris_alu_m_alloc_temps(t);
2366 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2367 cris_cc_mask(dc, CC_MASK_NZ);
2368 tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~3);
2369
2370 cris_alu(dc, CC_OP_CMP,
2371 cpu_R[dc->op2], t[1], tcg_const_tl(0), memsize_zz(dc));
2372 do_postinc(dc, memsize);
2373 cris_alu_m_free_temps(t);
2374 return insn_len;
2375 }
2376
2377 static int dec_and_m(CPUCRISState *env, DisasContext *dc)
2378 {
2379 TCGv t[2];
2380 int memsize = memsize_zz(dc);
2381 int insn_len;
2382 LOG_DIS("and.%c [$r%u%s, $r%u\n",
2383 memsize_char(memsize),
2384 dc->op1, dc->postinc ? "+]" : "]",
2385 dc->op2);
2386
2387 cris_alu_m_alloc_temps(t);
2388 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2389 cris_cc_mask(dc, CC_MASK_NZ);
2390 cris_alu(dc, CC_OP_AND, cpu_R[dc->op2], t[0], t[1], memsize_zz(dc));
2391 do_postinc(dc, memsize);
2392 cris_alu_m_free_temps(t);
2393 return insn_len;
2394 }
2395
2396 static int dec_add_m(CPUCRISState *env, DisasContext *dc)
2397 {
2398 TCGv t[2];
2399 int memsize = memsize_zz(dc);
2400 int insn_len;
2401 LOG_DIS("add.%c [$r%u%s, $r%u\n",
2402 memsize_char(memsize),
2403 dc->op1, dc->postinc ? "+]" : "]",
2404 dc->op2);
2405
2406 cris_alu_m_alloc_temps(t);
2407 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2408 cris_cc_mask(dc, CC_MASK_NZVC);
2409 cris_alu(dc, CC_OP_ADD,
2410 cpu_R[dc->op2], t[0], t[1], memsize_zz(dc));
2411 do_postinc(dc, memsize);
2412 cris_alu_m_free_temps(t);
2413 return insn_len;
2414 }
2415
2416 static int dec_addo_m(CPUCRISState *env, DisasContext *dc)
2417 {
2418 TCGv t[2];
2419 int memsize = memsize_zz(dc);
2420 int insn_len;
2421 LOG_DIS("add.%c [$r%u%s, $r%u\n",
2422 memsize_char(memsize),
2423 dc->op1, dc->postinc ? "+]" : "]",
2424 dc->op2);
2425
2426 cris_alu_m_alloc_temps(t);
2427 insn_len = dec_prep_alu_m(env, dc, 1, memsize, t[0], t[1]);
2428 cris_cc_mask(dc, 0);
2429 cris_alu(dc, CC_OP_ADD, cpu_R[R_ACR], t[0], t[1], 4);
2430 do_postinc(dc, memsize);
2431 cris_alu_m_free_temps(t);
2432 return insn_len;
2433 }
2434
2435 static int dec_bound_m(CPUCRISState *env, DisasContext *dc)
2436 {
2437 TCGv l[2];
2438 int memsize = memsize_zz(dc);
2439 int insn_len;
2440 LOG_DIS("bound.%c [$r%u%s, $r%u\n",
2441 memsize_char(memsize),
2442 dc->op1, dc->postinc ? "+]" : "]",
2443 dc->op2);
2444
2445 l[0] = tcg_temp_local_new();
2446 l[1] = tcg_temp_local_new();
2447 insn_len = dec_prep_alu_m(env, dc, 0, memsize, l[0], l[1]);
2448 cris_cc_mask(dc, CC_MASK_NZ);
2449 cris_alu(dc, CC_OP_BOUND, cpu_R[dc->op2], l[0], l[1], 4);
2450 do_postinc(dc, memsize);
2451 tcg_temp_free(l[0]);
2452 tcg_temp_free(l[1]);
2453 return insn_len;
2454 }
2455
2456 static int dec_addc_mr(CPUCRISState *env, DisasContext *dc)
2457 {
2458 TCGv t[2];
2459 int insn_len = 2;
2460 LOG_DIS("addc [$r%u%s, $r%u\n",
2461 dc->op1, dc->postinc ? "+]" : "]",
2462 dc->op2);
2463
2464 cris_evaluate_flags(dc);
2465
2466 /* Set for this insn. */
2467 dc->flagx_known = 1;
2468 dc->flags_x = X_FLAG;
2469
2470 cris_alu_m_alloc_temps(t);
2471 insn_len = dec_prep_alu_m(env, dc, 0, 4, t[0], t[1]);
2472 cris_cc_mask(dc, CC_MASK_NZVC);
2473 cris_alu(dc, CC_OP_ADDC, cpu_R[dc->op2], t[0], t[1], 4);
2474 do_postinc(dc, 4);
2475 cris_alu_m_free_temps(t);
2476 return insn_len;
2477 }
2478
2479 static int dec_sub_m(CPUCRISState *env, DisasContext *dc)
2480 {
2481 TCGv t[2];
2482 int memsize = memsize_zz(dc);
2483 int insn_len;
2484 LOG_DIS("sub.%c [$r%u%s, $r%u ir=%x zz=%x\n",
2485 memsize_char(memsize),
2486 dc->op1, dc->postinc ? "+]" : "]",
2487 dc->op2, dc->ir, dc->zzsize);
2488
2489 cris_alu_m_alloc_temps(t);
2490 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2491 cris_cc_mask(dc, CC_MASK_NZVC);
2492 cris_alu(dc, CC_OP_SUB, cpu_R[dc->op2], t[0], t[1], memsize);
2493 do_postinc(dc, memsize);
2494 cris_alu_m_free_temps(t);
2495 return insn_len;
2496 }
2497
2498 static int dec_or_m(CPUCRISState *env, DisasContext *dc)
2499 {
2500 TCGv t[2];
2501 int memsize = memsize_zz(dc);
2502 int insn_len;
2503 LOG_DIS("or.%c [$r%u%s, $r%u pc=%x\n",
2504 memsize_char(memsize),
2505 dc->op1, dc->postinc ? "+]" : "]",
2506 dc->op2, dc->pc);
2507
2508 cris_alu_m_alloc_temps(t);
2509 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2510 cris_cc_mask(dc, CC_MASK_NZ);
2511 cris_alu(dc, CC_OP_OR,
2512 cpu_R[dc->op2], t[0], t[1], memsize_zz(dc));
2513 do_postinc(dc, memsize);
2514 cris_alu_m_free_temps(t);
2515 return insn_len;
2516 }
2517
2518 static int dec_move_mp(CPUCRISState *env, DisasContext *dc)
2519 {
2520 TCGv t[2];
2521 int memsize = memsize_zz(dc);
2522 int insn_len = 2;
2523
2524 LOG_DIS("move.%c [$r%u%s, $p%u\n",
2525 memsize_char(memsize),
2526 dc->op1,
2527 dc->postinc ? "+]" : "]",
2528 dc->op2);
2529
2530 cris_alu_m_alloc_temps(t);
2531 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2532 cris_cc_mask(dc, 0);
2533 if (dc->op2 == PR_CCS) {
2534 cris_evaluate_flags(dc);
2535 if (dc->tb_flags & U_FLAG) {
2536 /* User space is not allowed to touch all flags. */
2537 tcg_gen_andi_tl(t[1], t[1], 0x39f);
2538 tcg_gen_andi_tl(t[0], cpu_PR[PR_CCS], ~0x39f);
2539 tcg_gen_or_tl(t[1], t[0], t[1]);
2540 }
2541 }
2542
2543 t_gen_mov_preg_TN(dc, dc->op2, t[1]);
2544
2545 do_postinc(dc, memsize);
2546 cris_alu_m_free_temps(t);
2547 return insn_len;
2548 }
2549
2550 static int dec_move_pm(CPUCRISState *env, DisasContext *dc)
2551 {
2552 TCGv t0;
2553 int memsize;
2554
2555 memsize = preg_sizes[dc->op2];
2556
2557 LOG_DIS("move.%c $p%u, [$r%u%s\n",
2558 memsize_char(memsize),
2559 dc->op2, dc->op1, dc->postinc ? "+]" : "]");
2560
2561 /* prepare store. Address in T0, value in T1. */
2562 if (dc->op2 == PR_CCS) {
2563 cris_evaluate_flags(dc);
2564 }
2565 t0 = tcg_temp_new();
2566 t_gen_mov_TN_preg(t0, dc->op2);
2567 cris_flush_cc_state(dc);
2568 gen_store(dc, cpu_R[dc->op1], t0, memsize);
2569 tcg_temp_free(t0);
2570
2571 cris_cc_mask(dc, 0);
2572 if (dc->postinc) {
2573 tcg_gen_addi_tl(cpu_R[dc->op1], cpu_R[dc->op1], memsize);
2574 }
2575 return 2;
2576 }
2577
2578 static int dec_movem_mr(CPUCRISState *env, DisasContext *dc)
2579 {
2580 TCGv_i64 tmp[16];
2581 TCGv tmp32;
2582 TCGv addr;
2583 int i;
2584 int nr = dc->op2 + 1;
2585
2586 LOG_DIS("movem [$r%u%s, $r%u\n", dc->op1,
2587 dc->postinc ? "+]" : "]", dc->op2);
2588
2589 addr = tcg_temp_new();
2590 /* There are probably better ways of doing this. */
2591 cris_flush_cc_state(dc);
2592 for (i = 0; i < (nr >> 1); i++) {
2593 tmp[i] = tcg_temp_new_i64();
2594 tcg_gen_addi_tl(addr, cpu_R[dc->op1], i * 8);
2595 gen_load64(dc, tmp[i], addr);
2596 }
2597 if (nr & 1) {
2598 tmp32 = tcg_temp_new_i32();
2599 tcg_gen_addi_tl(addr, cpu_R[dc->op1], i * 8);
2600 gen_load(dc, tmp32, addr, 4, 0);
2601 } else {
2602 TCGV_UNUSED(tmp32);
2603 }
2604 tcg_temp_free(addr);
2605
2606 for (i = 0; i < (nr >> 1); i++) {
2607 tcg_gen_extrl_i64_i32(cpu_R[i * 2], tmp[i]);
2608 tcg_gen_shri_i64(tmp[i], tmp[i], 32);
2609 tcg_gen_extrl_i64_i32(cpu_R[i * 2 + 1], tmp[i]);
2610 tcg_temp_free_i64(tmp[i]);
2611 }
2612 if (nr & 1) {
2613 tcg_gen_mov_tl(cpu_R[dc->op2], tmp32);
2614 tcg_temp_free(tmp32);
2615 }
2616
2617 /* writeback the updated pointer value. */
2618 if (dc->postinc) {
2619 tcg_gen_addi_tl(cpu_R[dc->op1], cpu_R[dc->op1], nr * 4);
2620 }
2621
2622 /* gen_load might want to evaluate the previous insns flags. */
2623 cris_cc_mask(dc, 0);
2624 return 2;
2625 }
2626
2627 static int dec_movem_rm(CPUCRISState *env, DisasContext *dc)
2628 {
2629 TCGv tmp;
2630 TCGv addr;
2631 int i;
2632
2633 LOG_DIS("movem $r%u, [$r%u%s\n", dc->op2, dc->op1,
2634 dc->postinc ? "+]" : "]");
2635
2636 cris_flush_cc_state(dc);
2637
2638 tmp = tcg_temp_new();
2639 addr = tcg_temp_new();
2640 tcg_gen_movi_tl(tmp, 4);
2641 tcg_gen_mov_tl(addr, cpu_R[dc->op1]);
2642 for (i = 0; i <= dc->op2; i++) {
2643 /* Displace addr. */
2644 /* Perform the store. */
2645 gen_store(dc, addr, cpu_R[i], 4);
2646 tcg_gen_add_tl(addr, addr, tmp);
2647 }
2648 if (dc->postinc) {
2649 tcg_gen_mov_tl(cpu_R[dc->op1], addr);
2650 }
2651 cris_cc_mask(dc, 0);
2652 tcg_temp_free(tmp);
2653 tcg_temp_free(addr);
2654 return 2;
2655 }
2656
2657 static int dec_move_rm(CPUCRISState *env, DisasContext *dc)
2658 {
2659 int memsize;
2660
2661 memsize = memsize_zz(dc);
2662
2663 LOG_DIS("move.%c $r%u, [$r%u]\n",
2664 memsize_char(memsize), dc->op2, dc->op1);
2665
2666 /* prepare store. */
2667 cris_flush_cc_state(dc);
2668 gen_store(dc, cpu_R[dc->op1], cpu_R[dc->op2], memsize);
2669
2670 if (dc->postinc) {
2671 tcg_gen_addi_tl(cpu_R[dc->op1], cpu_R[dc->op1], memsize);
2672 }
2673 cris_cc_mask(dc, 0);
2674 return 2;
2675 }
2676
2677 static int dec_lapcq(CPUCRISState *env, DisasContext *dc)
2678 {
2679 LOG_DIS("lapcq %x, $r%u\n",
2680 dc->pc + dc->op1*2, dc->op2);
2681 cris_cc_mask(dc, 0);
2682 tcg_gen_movi_tl(cpu_R[dc->op2], dc->pc + dc->op1 * 2);
2683 return 2;
2684 }
2685
2686 static int dec_lapc_im(CPUCRISState *env, DisasContext *dc)
2687 {
2688 unsigned int rd;
2689 int32_t imm;
2690 int32_t pc;
2691
2692 rd = dc->op2;
2693
2694 cris_cc_mask(dc, 0);
2695 imm = cris_fetch(env, dc, dc->pc + 2, 4, 0);
2696 LOG_DIS("lapc 0x%x, $r%u\n", imm + dc->pc, dc->op2);
2697
2698 pc = dc->pc;
2699 pc += imm;
2700 tcg_gen_movi_tl(cpu_R[rd], pc);
2701 return 6;
2702 }
2703
2704 /* Jump to special reg. */
2705 static int dec_jump_p(CPUCRISState *env, DisasContext *dc)
2706 {
2707 LOG_DIS("jump $p%u\n", dc->op2);
2708
2709 if (dc->op2 == PR_CCS) {
2710 cris_evaluate_flags(dc);
2711 }
2712 t_gen_mov_TN_preg(env_btarget, dc->op2);
2713 /* rete will often have low bit set to indicate delayslot. */
2714 tcg_gen_andi_tl(env_btarget, env_btarget, ~1);
2715 cris_cc_mask(dc, 0);
2716 cris_prepare_jmp(dc, JMP_INDIRECT);
2717 return 2;
2718 }
2719
2720 /* Jump and save. */
2721 static int dec_jas_r(CPUCRISState *env, DisasContext *dc)
2722 {
2723 LOG_DIS("jas $r%u, $p%u\n", dc->op1, dc->op2);
2724 cris_cc_mask(dc, 0);
2725 /* Store the return address in Pd. */
2726 tcg_gen_mov_tl(env_btarget, cpu_R[dc->op1]);
2727 if (dc->op2 > 15) {
2728 abort();
2729 }
2730 t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 4));
2731
2732 cris_prepare_jmp(dc, JMP_INDIRECT);
2733 return 2;
2734 }
2735
2736 static int dec_jas_im(CPUCRISState *env, DisasContext *dc)
2737 {
2738 uint32_t imm;
2739
2740 imm = cris_fetch(env, dc, dc->pc + 2, 4, 0);
2741
2742 LOG_DIS("jas 0x%x\n", imm);
2743 cris_cc_mask(dc, 0);
2744 /* Store the return address in Pd. */
2745 t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 8));
2746
2747 dc->jmp_pc = imm;
2748 cris_prepare_jmp(dc, JMP_DIRECT);
2749 return 6;
2750 }
2751
2752 static int dec_jasc_im(CPUCRISState *env, DisasContext *dc)
2753 {
2754 uint32_t imm;
2755
2756 imm = cris_fetch(env, dc, dc->pc + 2, 4, 0);
2757
2758 LOG_DIS("jasc 0x%x\n", imm);
2759 cris_cc_mask(dc, 0);
2760 /* Store the return address in Pd. */
2761 t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 8 + 4));
2762
2763 dc->jmp_pc = imm;
2764 cris_prepare_jmp(dc, JMP_DIRECT);
2765 return 6;
2766 }
2767
2768 static int dec_jasc_r(CPUCRISState *env, DisasContext *dc)
2769 {
2770 LOG_DIS("jasc_r $r%u, $p%u\n", dc->op1, dc->op2);
2771 cris_cc_mask(dc, 0);
2772 /* Store the return address in Pd. */
2773 tcg_gen_mov_tl(env_btarget, cpu_R[dc->op1]);
2774 t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 4 + 4));
2775 cris_prepare_jmp(dc, JMP_INDIRECT);
2776 return 2;
2777 }
2778
2779 static int dec_bcc_im(CPUCRISState *env, DisasContext *dc)
2780 {
2781 int32_t offset;
2782 uint32_t cond = dc->op2;
2783
2784 offset = cris_fetch(env, dc, dc->pc + 2, 2, 1);
2785
2786 LOG_DIS("b%s %d pc=%x dst=%x\n",
2787 cc_name(cond), offset,
2788 dc->pc, dc->pc + offset);
2789
2790 cris_cc_mask(dc, 0);
2791 /* op2 holds the condition-code. */
2792 cris_prepare_cc_branch(dc, offset, cond);
2793 return 4;
2794 }
2795
2796 static int dec_bas_im(CPUCRISState *env, DisasContext *dc)
2797 {
2798 int32_t simm;
2799
2800 simm = cris_fetch(env, dc, dc->pc + 2, 4, 0);
2801
2802 LOG_DIS("bas 0x%x, $p%u\n", dc->pc + simm, dc->op2);
2803 cris_cc_mask(dc, 0);
2804 /* Store the return address in Pd. */
2805 t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 8));
2806
2807 dc->jmp_pc = dc->pc + simm;
2808 cris_prepare_jmp(dc, JMP_DIRECT);
2809 return 6;
2810 }
2811
2812 static int dec_basc_im(CPUCRISState *env, DisasContext *dc)
2813 {
2814 int32_t simm;
2815 simm = cris_fetch(env, dc, dc->pc + 2, 4, 0);
2816
2817 LOG_DIS("basc 0x%x, $p%u\n", dc->pc + simm, dc->op2);
2818 cris_cc_mask(dc, 0);
2819 /* Store the return address in Pd. */
2820 t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 12));
2821
2822 dc->jmp_pc = dc->pc + simm;
2823 cris_prepare_jmp(dc, JMP_DIRECT);
2824 return 6;
2825 }
2826
2827 static int dec_rfe_etc(CPUCRISState *env, DisasContext *dc)
2828 {
2829 cris_cc_mask(dc, 0);
2830
2831 if (dc->op2 == 15) {
2832 tcg_gen_st_i32(tcg_const_i32(1), cpu_env,
2833 -offsetof(CRISCPU, env) + offsetof(CPUState, halted));
2834 tcg_gen_movi_tl(env_pc, dc->pc + 2);
2835 t_gen_raise_exception(EXCP_HLT);
2836 return 2;
2837 }
2838
2839 switch (dc->op2 & 7) {
2840 case 2:
2841 /* rfe. */
2842 LOG_DIS("rfe\n");
2843 cris_evaluate_flags(dc);
2844 gen_helper_rfe(cpu_env);
2845 dc->is_jmp = DISAS_UPDATE;
2846 break;
2847 case 5:
2848 /* rfn. */
2849 LOG_DIS("rfn\n");
2850 cris_evaluate_flags(dc);
2851 gen_helper_rfn(cpu_env);
2852 dc->is_jmp = DISAS_UPDATE;
2853 break;
2854 case 6:
2855 LOG_DIS("break %d\n", dc->op1);
2856 cris_evaluate_flags(dc);
2857 /* break. */
2858 tcg_gen_movi_tl(env_pc, dc->pc + 2);
2859
2860 /* Breaks start at 16 in the exception vector. */
2861 t_gen_mov_env_TN(trap_vector,
2862 tcg_const_tl(dc->op1 + 16));
2863 t_gen_raise_exception(EXCP_BREAK);
2864 dc->is_jmp = DISAS_UPDATE;
2865 break;
2866 default:
2867 printf("op2=%x\n", dc->op2);
2868 BUG();
2869 break;
2870
2871 }
2872 return 2;
2873 }
2874
2875 static int dec_ftag_fidx_d_m(CPUCRISState *env, DisasContext *dc)
2876 {
2877 return 2;
2878 }
2879
2880 static int dec_ftag_fidx_i_m(CPUCRISState *env, DisasContext *dc)
2881 {
2882 return 2;
2883 }
2884
2885 static int dec_null(CPUCRISState *env, DisasContext *dc)
2886 {
2887 printf("unknown insn pc=%x opc=%x op1=%x op2=%x\n",
2888 dc->pc, dc->opcode, dc->op1, dc->op2);
2889 fflush(NULL);
2890 BUG();
2891 return 2;
2892 }
2893
2894 static struct decoder_info {
2895 struct {
2896 uint32_t bits;
2897 uint32_t mask;
2898 };
2899 int (*dec)(CPUCRISState *env, DisasContext *dc);
2900 } decinfo[] = {
2901 /* Order matters here. */
2902 {DEC_MOVEQ, dec_moveq},
2903 {DEC_BTSTQ, dec_btstq},
2904 {DEC_CMPQ, dec_cmpq},
2905 {DEC_ADDOQ, dec_addoq},
2906 {DEC_ADDQ, dec_addq},
2907 {DEC_SUBQ, dec_subq},
2908 {DEC_ANDQ, dec_andq},
2909 {DEC_ORQ, dec_orq},
2910 {DEC_ASRQ, dec_asrq},
2911 {DEC_LSLQ, dec_lslq},
2912 {DEC_LSRQ, dec_lsrq},
2913 {DEC_BCCQ, dec_bccq},
2914
2915 {DEC_BCC_IM, dec_bcc_im},
2916 {DEC_JAS_IM, dec_jas_im},
2917 {DEC_JAS_R, dec_jas_r},
2918 {DEC_JASC_IM, dec_jasc_im},
2919 {DEC_JASC_R, dec_jasc_r},
2920 {DEC_BAS_IM, dec_bas_im},
2921 {DEC_BASC_IM, dec_basc_im},
2922 {DEC_JUMP_P, dec_jump_p},
2923 {DEC_LAPC_IM, dec_lapc_im},
2924 {DEC_LAPCQ, dec_lapcq},
2925
2926 {DEC_RFE_ETC, dec_rfe_etc},
2927 {DEC_ADDC_MR, dec_addc_mr},
2928
2929 {DEC_MOVE_MP, dec_move_mp},
2930 {DEC_MOVE_PM, dec_move_pm},
2931 {DEC_MOVEM_MR, dec_movem_mr},
2932 {DEC_MOVEM_RM, dec_movem_rm},
2933 {DEC_MOVE_PR, dec_move_pr},
2934 {DEC_SCC_R, dec_scc_r},
2935 {DEC_SETF, dec_setclrf},
2936 {DEC_CLEARF, dec_setclrf},
2937
2938 {DEC_MOVE_SR, dec_move_sr},
2939 {DEC_MOVE_RP, dec_move_rp},
2940 {DEC_SWAP_R, dec_swap_r},
2941 {DEC_ABS_R, dec_abs_r},
2942 {DEC_LZ_R, dec_lz_r},
2943 {DEC_MOVE_RS, dec_move_rs},
2944 {DEC_BTST_R, dec_btst_r},
2945 {DEC_ADDC_R, dec_addc_r},
2946
2947 {DEC_DSTEP_R, dec_dstep_r},
2948 {DEC_XOR_R, dec_xor_r},
2949 {DEC_MCP_R, dec_mcp_r},
2950 {DEC_CMP_R, dec_cmp_r},
2951
2952 {DEC_ADDI_R, dec_addi_r},
2953 {DEC_ADDI_ACR, dec_addi_acr},
2954
2955 {DEC_ADD_R, dec_add_r},
2956 {DEC_SUB_R, dec_sub_r},
2957
2958 {DEC_ADDU_R, dec_addu_r},
2959 {DEC_ADDS_R, dec_adds_r},
2960 {DEC_SUBU_R, dec_subu_r},
2961 {DEC_SUBS_R, dec_subs_r},
2962 {DEC_LSL_R, dec_lsl_r},
2963
2964 {DEC_AND_R, dec_and_r},
2965 {DEC_OR_R, dec_or_r},
2966 {DEC_BOUND_R, dec_bound_r},
2967 {DEC_ASR_R, dec_asr_r},
2968 {DEC_LSR_R, dec_lsr_r},
2969
2970 {DEC_MOVU_R, dec_movu_r},
2971 {DEC_MOVS_R, dec_movs_r},
2972 {DEC_NEG_R, dec_neg_r},
2973 {DEC_MOVE_R, dec_move_r},
2974
2975 {DEC_FTAG_FIDX_I_M, dec_ftag_fidx_i_m},
2976 {DEC_FTAG_FIDX_D_M, dec_ftag_fidx_d_m},
2977
2978 {DEC_MULS_R, dec_muls_r},
2979 {DEC_MULU_R, dec_mulu_r},
2980
2981 {DEC_ADDU_M, dec_addu_m},
2982 {DEC_ADDS_M, dec_adds_m},
2983 {DEC_SUBU_M, dec_subu_m},
2984 {DEC_SUBS_M, dec_subs_m},
2985
2986 {DEC_CMPU_M, dec_cmpu_m},
2987 {DEC_CMPS_M, dec_cmps_m},
2988 {DEC_MOVU_M, dec_movu_m},
2989 {DEC_MOVS_M, dec_movs_m},
2990
2991 {DEC_CMP_M, dec_cmp_m},
2992 {DEC_ADDO_M, dec_addo_m},
2993 {DEC_BOUND_M, dec_bound_m},
2994 {DEC_ADD_M, dec_add_m},
2995 {DEC_SUB_M, dec_sub_m},
2996 {DEC_AND_M, dec_and_m},
2997 {DEC_OR_M, dec_or_m},
2998 {DEC_MOVE_RM, dec_move_rm},
2999 {DEC_TEST_M, dec_test_m},
3000 {DEC_MOVE_MR, dec_move_mr},
3001
3002 {{0, 0}, dec_null}
3003 };
3004
3005 static unsigned int crisv32_decoder(CPUCRISState *env, DisasContext *dc)
3006 {
3007 int insn_len = 2;
3008 int i;
3009
3010 /* Load a halfword onto the instruction register. */
3011 dc->ir = cris_fetch(env, dc, dc->pc, 2, 0);
3012
3013 /* Now decode it. */
3014 dc->opcode = EXTRACT_FIELD(dc->ir, 4, 11);
3015 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 3);
3016 dc->op2 = EXTRACT_FIELD(dc->ir, 12, 15);
3017 dc->zsize = EXTRACT_FIELD(dc->ir, 4, 4);
3018 dc->zzsize = EXTRACT_FIELD(dc->ir, 4, 5);
3019 dc->postinc = EXTRACT_FIELD(dc->ir, 10, 10);
3020
3021 /* Large switch for all insns. */
3022 for (i = 0; i < ARRAY_SIZE(decinfo); i++) {
3023 if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits) {
3024 insn_len = decinfo[i].dec(env, dc);
3025 break;
3026 }
3027 }
3028
3029 #if !defined(CONFIG_USER_ONLY)
3030 /* Single-stepping ? */
3031 if (dc->tb_flags & S_FLAG) {
3032 TCGLabel *l1 = gen_new_label();
3033 tcg_gen_brcondi_tl(TCG_COND_NE, cpu_PR[PR_SPC], dc->pc, l1);
3034 /* We treat SPC as a break with an odd trap vector. */
3035 cris_evaluate_flags(dc);
3036 t_gen_mov_env_TN(trap_vector, tcg_const_tl(3));
3037 tcg_gen_movi_tl(env_pc, dc->pc + insn_len);
3038 tcg_gen_movi_tl(cpu_PR[PR_SPC], dc->pc + insn_len);
3039 t_gen_raise_exception(EXCP_BREAK);
3040 gen_set_label(l1);
3041 }
3042 #endif
3043 return insn_len;
3044 }
3045
3046 #include "translate_v10.c"
3047
3048 /*
3049 * Delay slots on QEMU/CRIS.
3050 *
3051 * If an exception hits on a delayslot, the core will let ERP (the Exception
3052 * Return Pointer) point to the branch (the previous) insn and set the lsb to
3053 * to give SW a hint that the exception actually hit on the dslot.
3054 *
3055 * CRIS expects all PC addresses to be 16-bit aligned. The lsb is ignored by
3056 * the core and any jmp to an odd addresses will mask off that lsb. It is
3057 * simply there to let sw know there was an exception on a dslot.
3058 *
3059 * When the software returns from an exception, the branch will re-execute.
3060 * On QEMU care needs to be taken when a branch+delayslot sequence is broken
3061 * and the branch and delayslot don't share pages.
3062 *
3063 * The TB contaning the branch insn will set up env->btarget and evaluate
3064 * env->btaken. When the translation loop exits we will note that the branch
3065 * sequence is broken and let env->dslot be the size of the branch insn (those
3066 * vary in length).
3067 *
3068 * The TB contaning the delayslot will have the PC of its real insn (i.e no lsb
3069 * set). It will also expect to have env->dslot setup with the size of the
3070 * delay slot so that env->pc - env->dslot point to the branch insn. This TB
3071 * will execute the dslot and take the branch, either to btarget or just one
3072 * insn ahead.
3073 *
3074 * When exceptions occur, we check for env->dslot in do_interrupt to detect
3075 * broken branch sequences and setup $erp accordingly (i.e let it point to the
3076 * branch and set lsb). Then env->dslot gets cleared so that the exception
3077 * handler can enter. When returning from exceptions (jump $erp) the lsb gets
3078 * masked off and we will reexecute the branch insn.
3079 *
3080 */
3081
3082 /* generate intermediate code for basic block 'tb'. */
3083 void gen_intermediate_code(CPUCRISState *env, struct TranslationBlock *tb)
3084 {
3085 CRISCPU *cpu = cris_env_get_cpu(env);
3086 CPUState *cs = CPU(cpu);
3087 uint32_t pc_start;
3088 unsigned int insn_len;
3089 struct DisasContext ctx;
3090 struct DisasContext *dc = &ctx;
3091 uint32_t next_page_start;
3092 target_ulong npc;
3093 int num_insns;
3094 int max_insns;
3095
3096 if (env->pregs[PR_VR] == 32) {
3097 dc->decoder = crisv32_decoder;
3098 dc->clear_locked_irq = 0;
3099 } else {
3100 dc->decoder = crisv10_decoder;
3101 dc->clear_locked_irq = 1;
3102 }
3103
3104 /* Odd PC indicates that branch is rexecuting due to exception in the
3105 * delayslot, like in real hw.
3106 */
3107 pc_start = tb->pc & ~1;
3108 dc->cpu = cpu;
3109 dc->tb = tb;
3110
3111 dc->is_jmp = DISAS_NEXT;
3112 dc->ppc = pc_start;
3113 dc->pc = pc_start;
3114 dc->singlestep_enabled = cs->singlestep_enabled;
3115 dc->flags_uptodate = 1;
3116 dc->flagx_known = 1;
3117 dc->flags_x = tb->flags & X_FLAG;
3118 dc->cc_x_uptodate = 0;
3119 dc->cc_mask = 0;
3120 dc->update_cc = 0;
3121 dc->clear_prefix = 0;
3122
3123 cris_update_cc_op(dc, CC_OP_FLAGS, 4);
3124 dc->cc_size_uptodate = -1;
3125
3126 /* Decode TB flags. */
3127 dc->tb_flags = tb->flags & (S_FLAG | P_FLAG | U_FLAG \
3128 | X_FLAG | PFIX_FLAG);
3129 dc->delayed_branch = !!(tb->flags & 7);
3130 if (dc->delayed_branch) {
3131 dc->jmp = JMP_INDIRECT;
3132 } else {
3133 dc->jmp = JMP_NOJMP;
3134 }
3135
3136 dc->cpustate_changed = 0;
3137
3138 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
3139 qemu_log(
3140 "pc=%x %x flg=%" PRIx64 " bt=%x ds=%u ccs=%x\n"
3141 "pid=%x usp=%x\n"
3142 "%x.%x.%x.%x\n"
3143 "%x.%x.%x.%x\n"
3144 "%x.%x.%x.%x\n"
3145 "%x.%x.%x.%x\n",
3146 dc->pc, dc->ppc,
3147 (uint64_t)tb->flags,
3148 env->btarget, (unsigned)tb->flags & 7,
3149 env->pregs[PR_CCS],
3150 env->pregs[PR_PID], env->pregs[PR_USP],
3151 env->regs[0], env->regs[1], env->regs[2], env->regs[3],
3152 env->regs[4], env->regs[5], env->regs[6], env->regs[7],