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typofixes - v4
[qemu/ar7.git] / target-cris / translate.c
blobaa90d7173f96a23f7977c7bc209d097e78b403e1
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 "cpu.h"
27 #include "disas/disas.h"
28 #include "tcg-op.h"
29 #include "exec/helper-proto.h"
30 #include "mmu.h"
31 #include "exec/cpu_ldst.h"
32 #include "crisv32-decode.h"
33
34 #include "exec/helper-gen.h"
35
36 #include "trace-tcg.h"
37
38
39 #define DISAS_CRIS 0
40 #if DISAS_CRIS
41 # define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__)
42 #else
43 # define LOG_DIS(...) do { } while (0)
44 #endif
45
46 #define D(x)
47 #define BUG() (gen_BUG(dc, __FILE__, __LINE__))
48 #define BUG_ON(x) ({if (x) BUG();})
49
50 #define DISAS_SWI 5
51
52 /* Used by the decoder. */
53 #define EXTRACT_FIELD(src, start, end) \
54 (((src) >> start) & ((1 << (end - start + 1)) - 1))
55
56 #define CC_MASK_NZ 0xc
57 #define CC_MASK_NZV 0xe
58 #define CC_MASK_NZVC 0xf
59 #define CC_MASK_RNZV 0x10e
60
61 static TCGv_ptr cpu_env;
62 static TCGv cpu_R[16];
63 static TCGv cpu_PR[16];
64 static TCGv cc_x;
65 static TCGv cc_src;
66 static TCGv cc_dest;
67 static TCGv cc_result;
68 static TCGv cc_op;
69 static TCGv cc_size;
70 static TCGv cc_mask;
71
72 static TCGv env_btaken;
73 static TCGv env_btarget;
74 static TCGv env_pc;
75
76 #include "exec/gen-icount.h"
77
78 /* This is the state at translation time. */
79 typedef struct DisasContext {
80 CRISCPU *cpu;
81 target_ulong pc, ppc;
82
83 /* Decoder. */
84 unsigned int (*decoder)(CPUCRISState *env, struct DisasContext *dc);
85 uint32_t ir;
86 uint32_t opcode;
87 unsigned int op1;
88 unsigned int op2;
89 unsigned int zsize, zzsize;
90 unsigned int mode;
91 unsigned int postinc;
92
93 unsigned int size;
94 unsigned int src;
95 unsigned int dst;
96 unsigned int cond;
97
98 int update_cc;
99 int cc_op;
100 int cc_size;
101 uint32_t cc_mask;
102
103 int cc_size_uptodate; /* -1 invalid or last written value. */
104
105 int cc_x_uptodate; /* 1 - ccs, 2 - known | X_FLAG. 0 not up-to-date. */
106 int flags_uptodate; /* Whether or not $ccs is up-to-date. */
107 int flagx_known; /* Whether or not flags_x has the x flag known at
108 translation time. */
109 int flags_x;
110
111 int clear_x; /* Clear x after this insn? */
112 int clear_prefix; /* Clear prefix after this insn? */
113 int clear_locked_irq; /* Clear the irq lockout. */
114 int cpustate_changed;
115 unsigned int tb_flags; /* tb dependent flags. */
116 int is_jmp;
117
118 #define JMP_NOJMP 0
119 #define JMP_DIRECT 1
120 #define JMP_DIRECT_CC 2
121 #define JMP_INDIRECT 3
122 int jmp; /* 0=nojmp, 1=direct, 2=indirect. */
123 uint32_t jmp_pc;
124
125 int delayed_branch;
126
127 struct TranslationBlock *tb;
128 int singlestep_enabled;
129 } DisasContext;
130
131 static void gen_BUG(DisasContext *dc, const char *file, int line)
132 {
133 printf("BUG: pc=%x %s %d\n", dc->pc, file, line);
134 qemu_log("BUG: pc=%x %s %d\n", dc->pc, file, line);
135 cpu_abort(CPU(dc->cpu), "%s:%d\n", file, line);
136 }
137
138 static const char *regnames[] =
139 {
140 "$r0", "$r1", "$r2", "$r3",
141 "$r4", "$r5", "$r6", "$r7",
142 "$r8", "$r9", "$r10", "$r11",
143 "$r12", "$r13", "$sp", "$acr",
144 };
145 static const char *pregnames[] =
146 {
147 "$bz", "$vr", "$pid", "$srs",
148 "$wz", "$exs", "$eda", "$mof",
149 "$dz", "$ebp", "$erp", "$srp",
150 "$nrp", "$ccs", "$usp", "$spc",
151 };
152
153 /* We need this table to handle preg-moves with implicit width. */
154 static int preg_sizes[] = {
155 1, /* bz. */
156 1, /* vr. */
157 4, /* pid. */
158 1, /* srs. */
159 2, /* wz. */
160 4, 4, 4,
161 4, 4, 4, 4,
162 4, 4, 4, 4,
163 };
164
165 #define t_gen_mov_TN_env(tn, member) \
166 tcg_gen_ld_tl(tn, cpu_env, offsetof(CPUCRISState, member))
167 #define t_gen_mov_env_TN(member, tn) \
168 tcg_gen_st_tl(tn, cpu_env, offsetof(CPUCRISState, member))
169
170 static inline void t_gen_mov_TN_preg(TCGv tn, int r)
171 {
172 assert(r >= 0 && r <= 15);
173 if (r == PR_BZ || r == PR_WZ || r == PR_DZ) {
174 tcg_gen_mov_tl(tn, tcg_const_tl(0));
175 } else if (r == PR_VR) {
176 tcg_gen_mov_tl(tn, tcg_const_tl(32));
177 } else {
178 tcg_gen_mov_tl(tn, cpu_PR[r]);
179 }
180 }
181 static inline void t_gen_mov_preg_TN(DisasContext *dc, int r, TCGv tn)
182 {
183 assert(r >= 0 && r <= 15);
184 if (r == PR_BZ || r == PR_WZ || r == PR_DZ) {
185 return;
186 } else if (r == PR_SRS) {
187 tcg_gen_andi_tl(cpu_PR[r], tn, 3);
188 } else {
189 if (r == PR_PID) {
190 gen_helper_tlb_flush_pid(cpu_env, tn);
191 }
192 if (dc->tb_flags & S_FLAG && r == PR_SPC) {
193 gen_helper_spc_write(cpu_env, tn);
194 } else if (r == PR_CCS) {
195 dc->cpustate_changed = 1;
196 }
197 tcg_gen_mov_tl(cpu_PR[r], tn);
198 }
199 }
200
201 /* Sign extend at translation time. */
202 static int sign_extend(unsigned int val, unsigned int width)
203 {
204 int sval;
205
206 /* LSL. */
207 val <<= 31 - width;
208 sval = val;
209 /* ASR. */
210 sval >>= 31 - width;
211 return sval;
212 }
213
214 static int cris_fetch(CPUCRISState *env, DisasContext *dc, uint32_t addr,
215 unsigned int size, unsigned int sign)
216 {
217 int r;
218
219 switch (size) {
220 case 4:
221 {
222 r = cpu_ldl_code(env, addr);
223 break;
224 }
225 case 2:
226 {
227 if (sign) {
228 r = cpu_ldsw_code(env, addr);
229 } else {
230 r = cpu_lduw_code(env, addr);
231 }
232 break;
233 }
234 case 1:
235 {
236 if (sign) {
237 r = cpu_ldsb_code(env, addr);
238 } else {
239 r = cpu_ldub_code(env, addr);
240 }
241 break;
242 }
243 default:
244 cpu_abort(CPU(dc->cpu), "Invalid fetch size %d\n", size);
245 break;
246 }
247 return r;
248 }
249
250 static void cris_lock_irq(DisasContext *dc)
251 {
252 dc->clear_locked_irq = 0;
253 t_gen_mov_env_TN(locked_irq, tcg_const_tl(1));
254 }
255
256 static inline void t_gen_raise_exception(uint32_t index)
257 {
258 TCGv_i32 tmp = tcg_const_i32(index);
259 gen_helper_raise_exception(cpu_env, tmp);
260 tcg_temp_free_i32(tmp);
261 }
262
263 static void t_gen_lsl(TCGv d, TCGv a, TCGv b)
264 {
265 TCGv t0, t_31;
266
267 t0 = tcg_temp_new();
268 t_31 = tcg_const_tl(31);
269 tcg_gen_shl_tl(d, a, b);
270
271 tcg_gen_sub_tl(t0, t_31, b);
272 tcg_gen_sar_tl(t0, t0, t_31);
273 tcg_gen_and_tl(t0, t0, d);
274 tcg_gen_xor_tl(d, d, t0);
275 tcg_temp_free(t0);
276 tcg_temp_free(t_31);
277 }
278
279 static void t_gen_lsr(TCGv d, TCGv a, TCGv b)
280 {
281 TCGv t0, t_31;
282
283 t0 = tcg_temp_new();
284 t_31 = tcg_temp_new();
285 tcg_gen_shr_tl(d, a, b);
286
287 tcg_gen_movi_tl(t_31, 31);
288 tcg_gen_sub_tl(t0, t_31, b);
289 tcg_gen_sar_tl(t0, t0, t_31);
290 tcg_gen_and_tl(t0, t0, d);
291 tcg_gen_xor_tl(d, d, t0);
292 tcg_temp_free(t0);
293 tcg_temp_free(t_31);
294 }
295
296 static void t_gen_asr(TCGv d, TCGv a, TCGv b)
297 {
298 TCGv t0, t_31;
299
300 t0 = tcg_temp_new();
301 t_31 = tcg_temp_new();
302 tcg_gen_sar_tl(d, a, b);
303
304 tcg_gen_movi_tl(t_31, 31);
305 tcg_gen_sub_tl(t0, t_31, b);
306 tcg_gen_sar_tl(t0, t0, t_31);
307 tcg_gen_or_tl(d, d, t0);
308 tcg_temp_free(t0);
309 tcg_temp_free(t_31);
310 }
311
312 static void t_gen_cris_dstep(TCGv d, TCGv a, TCGv b)
313 {
314 TCGv t = tcg_temp_new();
315
316 /*
317 * d <<= 1
318 * if (d >= s)
319 * d -= s;
320 */
321 tcg_gen_shli_tl(d, a, 1);
322 tcg_gen_sub_tl(t, d, b);
323 tcg_gen_movcond_tl(TCG_COND_GEU, d, d, b, t, d);
324 tcg_temp_free(t);
325 }
326
327 static void t_gen_cris_mstep(TCGv d, TCGv a, TCGv b, TCGv ccs)
328 {
329 TCGv t;
330
331 /*
332 * d <<= 1
333 * if (n)
334 * d += s;
335 */
336 t = tcg_temp_new();
337 tcg_gen_shli_tl(d, a, 1);
338 tcg_gen_shli_tl(t, ccs, 31 - 3);
339 tcg_gen_sari_tl(t, t, 31);
340 tcg_gen_and_tl(t, t, b);
341 tcg_gen_add_tl(d, d, t);
342 tcg_temp_free(t);
343 }
344
345 /* Extended arithmetics on CRIS. */
346 static inline void t_gen_add_flag(TCGv d, int flag)
347 {
348 TCGv c;
349
350 c = tcg_temp_new();
351 t_gen_mov_TN_preg(c, PR_CCS);
352 /* Propagate carry into d. */
353 tcg_gen_andi_tl(c, c, 1 << flag);
354 if (flag) {
355 tcg_gen_shri_tl(c, c, flag);
356 }
357 tcg_gen_add_tl(d, d, c);
358 tcg_temp_free(c);
359 }
360
361 static inline void t_gen_addx_carry(DisasContext *dc, TCGv d)
362 {
363 if (dc->flagx_known) {
364 if (dc->flags_x) {
365 TCGv c;
366
367 c = tcg_temp_new();
368 t_gen_mov_TN_preg(c, PR_CCS);
369 /* C flag is already at bit 0. */
370 tcg_gen_andi_tl(c, c, C_FLAG);
371 tcg_gen_add_tl(d, d, c);
372 tcg_temp_free(c);
373 }
374 } else {
375 TCGv x, c;
376
377 x = tcg_temp_new();
378 c = tcg_temp_new();
379 t_gen_mov_TN_preg(x, PR_CCS);
380 tcg_gen_mov_tl(c, x);
381
382 /* Propagate carry into d if X is set. Branch free. */
383 tcg_gen_andi_tl(c, c, C_FLAG);
384 tcg_gen_andi_tl(x, x, X_FLAG);
385 tcg_gen_shri_tl(x, x, 4);
386
387 tcg_gen_and_tl(x, x, c);
388 tcg_gen_add_tl(d, d, x);
389 tcg_temp_free(x);
390 tcg_temp_free(c);
391 }
392 }
393
394 static inline void t_gen_subx_carry(DisasContext *dc, TCGv d)
395 {
396 if (dc->flagx_known) {
397 if (dc->flags_x) {
398 TCGv c;
399
400 c = tcg_temp_new();
401 t_gen_mov_TN_preg(c, PR_CCS);
402 /* C flag is already at bit 0. */
403 tcg_gen_andi_tl(c, c, C_FLAG);
404 tcg_gen_sub_tl(d, d, c);
405 tcg_temp_free(c);
406 }
407 } else {
408 TCGv x, c;
409
410 x = tcg_temp_new();
411 c = tcg_temp_new();
412 t_gen_mov_TN_preg(x, PR_CCS);
413 tcg_gen_mov_tl(c, x);
414
415 /* Propagate carry into d if X is set. Branch free. */
416 tcg_gen_andi_tl(c, c, C_FLAG);
417 tcg_gen_andi_tl(x, x, X_FLAG);
418 tcg_gen_shri_tl(x, x, 4);
419
420 tcg_gen_and_tl(x, x, c);
421 tcg_gen_sub_tl(d, d, x);
422 tcg_temp_free(x);
423 tcg_temp_free(c);
424 }
425 }
426
427 /* Swap the two bytes within each half word of the s operand.
428 T0 = ((T0 << 8) & 0xff00ff00) | ((T0 >> 8) & 0x00ff00ff) */
429 static inline void t_gen_swapb(TCGv d, TCGv s)
430 {
431 TCGv t, org_s;
432
433 t = tcg_temp_new();
434 org_s = tcg_temp_new();
435
436 /* d and s may refer to the same object. */
437 tcg_gen_mov_tl(org_s, s);
438 tcg_gen_shli_tl(t, org_s, 8);
439 tcg_gen_andi_tl(d, t, 0xff00ff00);
440 tcg_gen_shri_tl(t, org_s, 8);
441 tcg_gen_andi_tl(t, t, 0x00ff00ff);
442 tcg_gen_or_tl(d, d, t);
443 tcg_temp_free(t);
444 tcg_temp_free(org_s);
445 }
446
447 /* Swap the halfwords of the s operand. */
448 static inline void t_gen_swapw(TCGv d, TCGv s)
449 {
450 TCGv t;
451 /* d and s refer the same object. */
452 t = tcg_temp_new();
453 tcg_gen_mov_tl(t, s);
454 tcg_gen_shli_tl(d, t, 16);
455 tcg_gen_shri_tl(t, t, 16);
456 tcg_gen_or_tl(d, d, t);
457 tcg_temp_free(t);
458 }
459
460 /* Reverse the within each byte.
461 T0 = (((T0 << 7) & 0x80808080) |
462 ((T0 << 5) & 0x40404040) |
463 ((T0 << 3) & 0x20202020) |
464 ((T0 << 1) & 0x10101010) |
465 ((T0 >> 1) & 0x08080808) |
466 ((T0 >> 3) & 0x04040404) |
467 ((T0 >> 5) & 0x02020202) |
468 ((T0 >> 7) & 0x01010101));
469 */
470 static inline void t_gen_swapr(TCGv d, TCGv s)
471 {
472 struct {
473 int shift; /* LSL when positive, LSR when negative. */
474 uint32_t mask;
475 } bitrev[] = {
476 {7, 0x80808080},
477 {5, 0x40404040},
478 {3, 0x20202020},
479 {1, 0x10101010},
480 {-1, 0x08080808},
481 {-3, 0x04040404},
482 {-5, 0x02020202},
483 {-7, 0x01010101}
484 };
485 int i;
486 TCGv t, org_s;
487
488 /* d and s refer the same object. */
489 t = tcg_temp_new();
490 org_s = tcg_temp_new();
491 tcg_gen_mov_tl(org_s, s);
492
493 tcg_gen_shli_tl(t, org_s, bitrev[0].shift);
494 tcg_gen_andi_tl(d, t, bitrev[0].mask);
495 for (i = 1; i < ARRAY_SIZE(bitrev); i++) {
496 if (bitrev[i].shift >= 0) {
497 tcg_gen_shli_tl(t, org_s, bitrev[i].shift);
498 } else {
499 tcg_gen_shri_tl(t, org_s, -bitrev[i].shift);
500 }
501 tcg_gen_andi_tl(t, t, bitrev[i].mask);
502 tcg_gen_or_tl(d, d, t);
503 }
504 tcg_temp_free(t);
505 tcg_temp_free(org_s);
506 }
507
508 static void t_gen_cc_jmp(TCGv pc_true, TCGv pc_false)
509 {
510 TCGLabel *l1 = gen_new_label();
511
512 /* Conditional jmp. */
513 tcg_gen_mov_tl(env_pc, pc_false);
514 tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1);
515 tcg_gen_mov_tl(env_pc, pc_true);
516 gen_set_label(l1);
517 }
518
519 static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
520 {
521 TranslationBlock *tb;
522 tb = dc->tb;
523 if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
524 tcg_gen_goto_tb(n);
525 tcg_gen_movi_tl(env_pc, dest);
526 tcg_gen_exit_tb((uintptr_t)tb + n);
527 } else {
528 tcg_gen_movi_tl(env_pc, dest);
529 tcg_gen_exit_tb(0);
530 }
531 }
532
533 static inline void cris_clear_x_flag(DisasContext *dc)
534 {
535 if (dc->flagx_known && dc->flags_x) {
536 dc->flags_uptodate = 0;
537 }
538
539 dc->flagx_known = 1;
540 dc->flags_x = 0;
541 }
542
543 static void cris_flush_cc_state(DisasContext *dc)
544 {
545 if (dc->cc_size_uptodate != dc->cc_size) {
546 tcg_gen_movi_tl(cc_size, dc->cc_size);
547 dc->cc_size_uptodate = dc->cc_size;
548 }
549 tcg_gen_movi_tl(cc_op, dc->cc_op);
550 tcg_gen_movi_tl(cc_mask, dc->cc_mask);
551 }
552
553 static void cris_evaluate_flags(DisasContext *dc)
554 {
555 if (dc->flags_uptodate) {
556 return;
557 }
558
559 cris_flush_cc_state(dc);
560
561 switch (dc->cc_op) {
562 case CC_OP_MCP:
563 gen_helper_evaluate_flags_mcp(cpu_PR[PR_CCS], cpu_env,
564 cpu_PR[PR_CCS], cc_src,
565 cc_dest, cc_result);
566 break;
567 case CC_OP_MULS:
568 gen_helper_evaluate_flags_muls(cpu_PR[PR_CCS], cpu_env,
569 cpu_PR[PR_CCS], cc_result,
570 cpu_PR[PR_MOF]);
571 break;
572 case CC_OP_MULU:
573 gen_helper_evaluate_flags_mulu(cpu_PR[PR_CCS], cpu_env,
574 cpu_PR[PR_CCS], cc_result,
575 cpu_PR[PR_MOF]);
576 break;
577 case CC_OP_MOVE:
578 case CC_OP_AND:
579 case CC_OP_OR:
580 case CC_OP_XOR:
581 case CC_OP_ASR:
582 case CC_OP_LSR:
583 case CC_OP_LSL:
584 switch (dc->cc_size) {
585 case 4:
586 gen_helper_evaluate_flags_move_4(cpu_PR[PR_CCS],
587 cpu_env, cpu_PR[PR_CCS], cc_result);
588 break;
589 case 2:
590 gen_helper_evaluate_flags_move_2(cpu_PR[PR_CCS],
591 cpu_env, cpu_PR[PR_CCS], cc_result);
592 break;
593 default:
594 gen_helper_evaluate_flags(cpu_env);
595 break;
596 }
597 break;
598 case CC_OP_FLAGS:
599 /* live. */
600 break;
601 case CC_OP_SUB:
602 case CC_OP_CMP:
603 if (dc->cc_size == 4) {
604 gen_helper_evaluate_flags_sub_4(cpu_PR[PR_CCS], cpu_env,
605 cpu_PR[PR_CCS], cc_src, cc_dest, cc_result);
606 } else {
607 gen_helper_evaluate_flags(cpu_env);
608 }
609
610 break;
611 default:
612 switch (dc->cc_size) {
613 case 4:
614 gen_helper_evaluate_flags_alu_4(cpu_PR[PR_CCS], cpu_env,
615 cpu_PR[PR_CCS], cc_src, cc_dest, cc_result);
616 break;
617 default:
618 gen_helper_evaluate_flags(cpu_env);
619 break;
620 }
621 break;
622 }
623
624 if (dc->flagx_known) {
625 if (dc->flags_x) {
626 tcg_gen_ori_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], X_FLAG);
627 } else if (dc->cc_op == CC_OP_FLAGS) {
628 tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~X_FLAG);
629 }
630 }
631 dc->flags_uptodate = 1;
632 }
633
634 static void cris_cc_mask(DisasContext *dc, unsigned int mask)
635 {
636 uint32_t ovl;
637
638 if (!mask) {
639 dc->update_cc = 0;
640 return;
641 }
642
643 /* Check if we need to evaluate the condition codes due to
644 CC overlaying. */
645 ovl = (dc->cc_mask ^ mask) & ~mask;
646 if (ovl) {
647 /* TODO: optimize this case. It trigs all the time. */
648 cris_evaluate_flags(dc);
649 }
650 dc->cc_mask = mask;
651 dc->update_cc = 1;
652 }
653
654 static void cris_update_cc_op(DisasContext *dc, int op, int size)
655 {
656 dc->cc_op = op;
657 dc->cc_size = size;
658 dc->flags_uptodate = 0;
659 }
660
661 static inline void cris_update_cc_x(DisasContext *dc)
662 {
663 /* Save the x flag state at the time of the cc snapshot. */
664 if (dc->flagx_known) {
665 if (dc->cc_x_uptodate == (2 | dc->flags_x)) {
666 return;
667 }
668 tcg_gen_movi_tl(cc_x, dc->flags_x);
669 dc->cc_x_uptodate = 2 | dc->flags_x;
670 } else {
671 tcg_gen_andi_tl(cc_x, cpu_PR[PR_CCS], X_FLAG);
672 dc->cc_x_uptodate = 1;
673 }
674 }
675
676 /* Update cc prior to executing ALU op. Needs source operands untouched. */
677 static void cris_pre_alu_update_cc(DisasContext *dc, int op,
678 TCGv dst, TCGv src, int size)
679 {
680 if (dc->update_cc) {
681 cris_update_cc_op(dc, op, size);
682 tcg_gen_mov_tl(cc_src, src);
683
684 if (op != CC_OP_MOVE
685 && op != CC_OP_AND
686 && op != CC_OP_OR
687 && op != CC_OP_XOR
688 && op != CC_OP_ASR
689 && op != CC_OP_LSR
690 && op != CC_OP_LSL) {
691 tcg_gen_mov_tl(cc_dest, dst);
692 }
693
694 cris_update_cc_x(dc);
695 }
696 }
697
698 /* Update cc after executing ALU op. needs the result. */
699 static inline void cris_update_result(DisasContext *dc, TCGv res)
700 {
701 if (dc->update_cc) {
702 tcg_gen_mov_tl(cc_result, res);
703 }
704 }
705
706 /* Returns one if the write back stage should execute. */
707 static void cris_alu_op_exec(DisasContext *dc, int op,
708 TCGv dst, TCGv a, TCGv b, int size)
709 {
710 /* Emit the ALU insns. */
711 switch (op) {
712 case CC_OP_ADD:
713 tcg_gen_add_tl(dst, a, b);
714 /* Extended arithmetics. */
715 t_gen_addx_carry(dc, dst);
716 break;
717 case CC_OP_ADDC:
718 tcg_gen_add_tl(dst, a, b);
719 t_gen_add_flag(dst, 0); /* C_FLAG. */
720 break;
721 case CC_OP_MCP:
722 tcg_gen_add_tl(dst, a, b);
723 t_gen_add_flag(dst, 8); /* R_FLAG. */
724 break;
725 case CC_OP_SUB:
726 tcg_gen_sub_tl(dst, a, b);
727 /* Extended arithmetics. */
728 t_gen_subx_carry(dc, dst);
729 break;
730 case CC_OP_MOVE:
731 tcg_gen_mov_tl(dst, b);
732 break;
733 case CC_OP_OR:
734 tcg_gen_or_tl(dst, a, b);
735 break;
736 case CC_OP_AND:
737 tcg_gen_and_tl(dst, a, b);
738 break;
739 case CC_OP_XOR:
740 tcg_gen_xor_tl(dst, a, b);
741 break;
742 case CC_OP_LSL:
743 t_gen_lsl(dst, a, b);
744 break;
745 case CC_OP_LSR:
746 t_gen_lsr(dst, a, b);
747 break;
748 case CC_OP_ASR:
749 t_gen_asr(dst, a, b);
750 break;
751 case CC_OP_NEG:
752 tcg_gen_neg_tl(dst, b);
753 /* Extended arithmetics. */
754 t_gen_subx_carry(dc, dst);
755 break;
756 case CC_OP_LZ:
757 gen_helper_lz(dst, b);
758 break;
759 case CC_OP_MULS:
760 tcg_gen_muls2_tl(dst, cpu_PR[PR_MOF], a, b);
761 break;
762 case CC_OP_MULU:
763 tcg_gen_mulu2_tl(dst, cpu_PR[PR_MOF], a, b);
764 break;
765 case CC_OP_DSTEP:
766 t_gen_cris_dstep(dst, a, b);
767 break;
768 case CC_OP_MSTEP:
769 t_gen_cris_mstep(dst, a, b, cpu_PR[PR_CCS]);
770 break;
771 case CC_OP_BOUND:
772 tcg_gen_movcond_tl(TCG_COND_LEU, dst, a, b, a, b);
773 break;
774 case CC_OP_CMP:
775 tcg_gen_sub_tl(dst, a, b);
776 /* Extended arithmetics. */
777 t_gen_subx_carry(dc, dst);
778 break;
779 default:
780 qemu_log("illegal ALU op.\n");
781 BUG();
782 break;
783 }
784
785 if (size == 1) {
786 tcg_gen_andi_tl(dst, dst, 0xff);
787 } else if (size == 2) {
788 tcg_gen_andi_tl(dst, dst, 0xffff);
789 }
790 }
791
792 static void cris_alu(DisasContext *dc, int op,
793 TCGv d, TCGv op_a, TCGv op_b, int size)
794 {
795 TCGv tmp;
796 int writeback;
797
798 writeback = 1;
799
800 if (op == CC_OP_CMP) {
801 tmp = tcg_temp_new();
802 writeback = 0;
803 } else if (size == 4) {
804 tmp = d;
805 writeback = 0;
806 } else {
807 tmp = tcg_temp_new();
808 }
809
810
811 cris_pre_alu_update_cc(dc, op, op_a, op_b, size);
812 cris_alu_op_exec(dc, op, tmp, op_a, op_b, size);
813 cris_update_result(dc, tmp);
814
815 /* Writeback. */
816 if (writeback) {
817 if (size == 1) {
818 tcg_gen_andi_tl(d, d, ~0xff);
819 } else {
820 tcg_gen_andi_tl(d, d, ~0xffff);
821 }
822 tcg_gen_or_tl(d, d, tmp);
823 }
824 if (!TCGV_EQUAL(tmp, d)) {
825 tcg_temp_free(tmp);
826 }
827 }
828
829 static int arith_cc(DisasContext *dc)
830 {
831 if (dc->update_cc) {
832 switch (dc->cc_op) {
833 case CC_OP_ADDC: return 1;
834 case CC_OP_ADD: return 1;
835 case CC_OP_SUB: return 1;
836 case CC_OP_DSTEP: return 1;
837 case CC_OP_LSL: return 1;
838 case CC_OP_LSR: return 1;
839 case CC_OP_ASR: return 1;
840 case CC_OP_CMP: return 1;
841 case CC_OP_NEG: return 1;
842 case CC_OP_OR: return 1;
843 case CC_OP_AND: return 1;
844 case CC_OP_XOR: return 1;
845 case CC_OP_MULU: return 1;
846 case CC_OP_MULS: return 1;
847 default:
848 return 0;
849 }
850 }
851 return 0;
852 }
853
854 static void gen_tst_cc (DisasContext *dc, TCGv cc, int cond)
855 {
856 int arith_opt, move_opt;
857
858 /* TODO: optimize more condition codes. */
859
860 /*
861 * If the flags are live, we've gotta look into the bits of CCS.
862 * Otherwise, if we just did an arithmetic operation we try to
863 * evaluate the condition code faster.
864 *
865 * When this function is done, T0 should be non-zero if the condition
866 * code is true.
867 */
868 arith_opt = arith_cc(dc) && !dc->flags_uptodate;
869 move_opt = (dc->cc_op == CC_OP_MOVE);
870 switch (cond) {
871 case CC_EQ:
872 if ((arith_opt || move_opt)
873 && dc->cc_x_uptodate != (2 | X_FLAG)) {
874 tcg_gen_setcond_tl(TCG_COND_EQ, cc,
875 cc_result, tcg_const_tl(0));
876 } else {
877 cris_evaluate_flags(dc);
878 tcg_gen_andi_tl(cc,
879 cpu_PR[PR_CCS], Z_FLAG);
880 }
881 break;
882 case CC_NE:
883 if ((arith_opt || move_opt)
884 && dc->cc_x_uptodate != (2 | X_FLAG)) {
885 tcg_gen_mov_tl(cc, cc_result);
886 } else {
887 cris_evaluate_flags(dc);
888 tcg_gen_xori_tl(cc, cpu_PR[PR_CCS],
889 Z_FLAG);
890 tcg_gen_andi_tl(cc, cc, Z_FLAG);
891 }
892 break;
893 case CC_CS:
894 cris_evaluate_flags(dc);
895 tcg_gen_andi_tl(cc, cpu_PR[PR_CCS], C_FLAG);
896 break;
897 case CC_CC:
898 cris_evaluate_flags(dc);
899 tcg_gen_xori_tl(cc, cpu_PR[PR_CCS], C_FLAG);
900 tcg_gen_andi_tl(cc, cc, C_FLAG);
901 break;
902 case CC_VS:
903 cris_evaluate_flags(dc);
904 tcg_gen_andi_tl(cc, cpu_PR[PR_CCS], V_FLAG);
905 break;
906 case CC_VC:
907 cris_evaluate_flags(dc);
908 tcg_gen_xori_tl(cc, cpu_PR[PR_CCS],
909 V_FLAG);
910 tcg_gen_andi_tl(cc, cc, V_FLAG);
911 break;
912 case CC_PL:
913 if (arith_opt || move_opt) {
914 int bits = 31;
915
916 if (dc->cc_size == 1) {
917 bits = 7;
918 } else if (dc->cc_size == 2) {
919 bits = 15;
920 }
921
922 tcg_gen_shri_tl(cc, cc_result, bits);
923 tcg_gen_xori_tl(cc, cc, 1);
924 } else {
925 cris_evaluate_flags(dc);
926 tcg_gen_xori_tl(cc, cpu_PR[PR_CCS],
927 N_FLAG);
928 tcg_gen_andi_tl(cc, cc, N_FLAG);
929 }
930 break;
931 case CC_MI:
932 if (arith_opt || move_opt) {
933 int bits = 31;
934
935 if (dc->cc_size == 1) {
936 bits = 7;
937 } else if (dc->cc_size == 2) {
938 bits = 15;
939 }
940
941 tcg_gen_shri_tl(cc, cc_result, bits);
942 tcg_gen_andi_tl(cc, cc, 1);
943 } else {
944 cris_evaluate_flags(dc);
945 tcg_gen_andi_tl(cc, cpu_PR[PR_CCS],
946 N_FLAG);
947 }
948 break;
949 case CC_LS:
950 cris_evaluate_flags(dc);
951 tcg_gen_andi_tl(cc, cpu_PR[PR_CCS],
952 C_FLAG | Z_FLAG);
953 break;
954 case CC_HI:
955 cris_evaluate_flags(dc);
956 {
957 TCGv tmp;
958
959 tmp = tcg_temp_new();
960 tcg_gen_xori_tl(tmp, cpu_PR[PR_CCS],
961 C_FLAG | Z_FLAG);
962 /* Overlay the C flag on top of the Z. */
963 tcg_gen_shli_tl(cc, tmp, 2);
964 tcg_gen_and_tl(cc, tmp, cc);
965 tcg_gen_andi_tl(cc, cc, Z_FLAG);
966
967 tcg_temp_free(tmp);
968 }
969 break;
970 case CC_GE:
971 cris_evaluate_flags(dc);
972 /* Overlay the V flag on top of the N. */
973 tcg_gen_shli_tl(cc, cpu_PR[PR_CCS], 2);
974 tcg_gen_xor_tl(cc,
975 cpu_PR[PR_CCS], cc);
976 tcg_gen_andi_tl(cc, cc, N_FLAG);
977 tcg_gen_xori_tl(cc, cc, N_FLAG);
978 break;
979 case CC_LT:
980 cris_evaluate_flags(dc);
981 /* Overlay the V flag on top of the N. */
982 tcg_gen_shli_tl(cc, cpu_PR[PR_CCS], 2);
983 tcg_gen_xor_tl(cc,
984 cpu_PR[PR_CCS], cc);
985 tcg_gen_andi_tl(cc, cc, N_FLAG);
986 break;
987 case CC_GT:
988 cris_evaluate_flags(dc);
989 {
990 TCGv n, z;
991
992 n = tcg_temp_new();
993 z = tcg_temp_new();
994
995 /* To avoid a shift we overlay everything on
996 the V flag. */
997 tcg_gen_shri_tl(n, cpu_PR[PR_CCS], 2);
998 tcg_gen_shri_tl(z, cpu_PR[PR_CCS], 1);
999 /* invert Z. */
1000 tcg_gen_xori_tl(z, z, 2);
1001
1002 tcg_gen_xor_tl(n, n, cpu_PR[PR_CCS]);
1003 tcg_gen_xori_tl(n, n, 2);
1004 tcg_gen_and_tl(cc, z, n);
1005 tcg_gen_andi_tl(cc, cc, 2);
1006
1007 tcg_temp_free(n);
1008 tcg_temp_free(z);
1009 }
1010 break;
1011 case CC_LE:
1012 cris_evaluate_flags(dc);
1013 {
1014 TCGv n, z;
1015
1016 n = tcg_temp_new();
1017 z = tcg_temp_new();
1018
1019 /* To avoid a shift we overlay everything on
1020 the V flag. */
1021 tcg_gen_shri_tl(n, cpu_PR[PR_CCS], 2);
1022 tcg_gen_shri_tl(z, cpu_PR[PR_CCS], 1);
1023
1024 tcg_gen_xor_tl(n, n, cpu_PR[PR_CCS]);
1025 tcg_gen_or_tl(cc, z, n);
1026 tcg_gen_andi_tl(cc, cc, 2);
1027
1028 tcg_temp_free(n);
1029 tcg_temp_free(z);
1030 }
1031 break;
1032 case CC_P:
1033 cris_evaluate_flags(dc);
1034 tcg_gen_andi_tl(cc, cpu_PR[PR_CCS], P_FLAG);
1035 break;
1036 case CC_A:
1037 tcg_gen_movi_tl(cc, 1);
1038 break;
1039 default:
1040 BUG();
1041 break;
1042 };
1043 }
1044
1045 static void cris_store_direct_jmp(DisasContext *dc)
1046 {
1047 /* Store the direct jmp state into the cpu-state. */
1048 if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
1049 if (dc->jmp == JMP_DIRECT) {
1050 tcg_gen_movi_tl(env_btaken, 1);
1051 }
1052 tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
1053 dc->jmp = JMP_INDIRECT;
1054 }
1055 }
1056
1057 static void cris_prepare_cc_branch (DisasContext *dc,
1058 int offset, int cond)
1059 {
1060 /* This helps us re-schedule the micro-code to insns in delay-slots
1061 before the actual jump. */
1062 dc->delayed_branch = 2;
1063 dc->jmp = JMP_DIRECT_CC;
1064 dc->jmp_pc = dc->pc + offset;
1065
1066 gen_tst_cc(dc, env_btaken, cond);
1067 tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
1068 }
1069
1070
1071 /* jumps, when the dest is in a live reg for example. Direct should be set
1072 when the dest addr is constant to allow tb chaining. */
1073 static inline void cris_prepare_jmp (DisasContext *dc, unsigned int type)
1074 {
1075 /* This helps us re-schedule the micro-code to insns in delay-slots
1076 before the actual jump. */
1077 dc->delayed_branch = 2;
1078 dc->jmp = type;
1079 if (type == JMP_INDIRECT) {
1080 tcg_gen_movi_tl(env_btaken, 1);
1081 }
1082 }
1083
1084 static void gen_load64(DisasContext *dc, TCGv_i64 dst, TCGv addr)
1085 {
1086 int mem_index = cpu_mmu_index(&dc->cpu->env);
1087
1088 /* If we get a fault on a delayslot we must keep the jmp state in
1089 the cpu-state to be able to re-execute the jmp. */
1090 if (dc->delayed_branch == 1) {
1091 cris_store_direct_jmp(dc);
1092 }
1093
1094 tcg_gen_qemu_ld_i64(dst, addr, mem_index, MO_TEQ);
1095 }
1096
1097 static void gen_load(DisasContext *dc, TCGv dst, TCGv addr,
1098 unsigned int size, int sign)
1099 {
1100 int mem_index = cpu_mmu_index(&dc->cpu->env);
1101
1102 /* If we get a fault on a delayslot we must keep the jmp state in
1103 the cpu-state to be able to re-execute the jmp. */
1104 if (dc->delayed_branch == 1) {
1105 cris_store_direct_jmp(dc);
1106 }
1107
1108 tcg_gen_qemu_ld_tl(dst, addr, mem_index,
1109 MO_TE + ctz32(size) + (sign ? MO_SIGN : 0));
1110 }
1111
1112 static void gen_store (DisasContext *dc, TCGv addr, TCGv val,
1113 unsigned int size)
1114 {
1115 int mem_index = cpu_mmu_index(&dc->cpu->env);
1116
1117 /* If we get a fault on a delayslot we must keep the jmp state in
1118 the cpu-state to be able to re-execute the jmp. */
1119 if (dc->delayed_branch == 1) {
1120 cris_store_direct_jmp(dc);
1121 }
1122
1123
1124 /* Conditional writes. We only support the kind were X and P are known
1125 at translation time. */
1126 if (dc->flagx_known && dc->flags_x && (dc->tb_flags & P_FLAG)) {
1127 dc->postinc = 0;
1128 cris_evaluate_flags(dc);
1129 tcg_gen_ori_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], C_FLAG);
1130 return;
1131 }
1132
1133 tcg_gen_qemu_st_tl(val, addr, mem_index, MO_TE + ctz32(size));
1134
1135 if (dc->flagx_known && dc->flags_x) {
1136 cris_evaluate_flags(dc);
1137 tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~C_FLAG);
1138 }
1139 }
1140
1141 static inline void t_gen_sext(TCGv d, TCGv s, int size)
1142 {
1143 if (size == 1) {
1144 tcg_gen_ext8s_i32(d, s);
1145 } else if (size == 2) {
1146 tcg_gen_ext16s_i32(d, s);
1147 } else if (!TCGV_EQUAL(d, s)) {
1148 tcg_gen_mov_tl(d, s);
1149 }
1150 }
1151
1152 static inline void t_gen_zext(TCGv d, TCGv s, int size)
1153 {
1154 if (size == 1) {
1155 tcg_gen_ext8u_i32(d, s);
1156 } else if (size == 2) {
1157 tcg_gen_ext16u_i32(d, s);
1158 } else if (!TCGV_EQUAL(d, s)) {
1159 tcg_gen_mov_tl(d, s);
1160 }
1161 }
1162
1163 #if DISAS_CRIS
1164 static char memsize_char(int size)
1165 {
1166 switch (size) {
1167 case 1: return 'b'; break;
1168 case 2: return 'w'; break;
1169 case 4: return 'd'; break;
1170 default:
1171 return 'x';
1172 break;
1173 }
1174 }
1175 #endif
1176
1177 static inline unsigned int memsize_z(DisasContext *dc)
1178 {
1179 return dc->zsize + 1;
1180 }
1181
1182 static inline unsigned int memsize_zz(DisasContext *dc)
1183 {
1184 switch (dc->zzsize) {
1185 case 0: return 1;
1186 case 1: return 2;
1187 default:
1188 return 4;
1189 }
1190 }
1191
1192 static inline void do_postinc (DisasContext *dc, int size)
1193 {
1194 if (dc->postinc) {
1195 tcg_gen_addi_tl(cpu_R[dc->op1], cpu_R[dc->op1], size);
1196 }
1197 }
1198
1199 static inline void dec_prep_move_r(DisasContext *dc, int rs, int rd,
1200 int size, int s_ext, TCGv dst)
1201 {
1202 if (s_ext) {
1203 t_gen_sext(dst, cpu_R[rs], size);
1204 } else {
1205 t_gen_zext(dst, cpu_R[rs], size);
1206 }
1207 }
1208
1209 /* Prepare T0 and T1 for a register alu operation.
1210 s_ext decides if the operand1 should be sign-extended or zero-extended when
1211 needed. */
1212 static void dec_prep_alu_r(DisasContext *dc, int rs, int rd,
1213 int size, int s_ext, TCGv dst, TCGv src)
1214 {
1215 dec_prep_move_r(dc, rs, rd, size, s_ext, src);
1216
1217 if (s_ext) {
1218 t_gen_sext(dst, cpu_R[rd], size);
1219 } else {
1220 t_gen_zext(dst, cpu_R[rd], size);
1221 }
1222 }
1223
1224 static int dec_prep_move_m(CPUCRISState *env, DisasContext *dc,
1225 int s_ext, int memsize, TCGv dst)
1226 {
1227 unsigned int rs;
1228 uint32_t imm;
1229 int is_imm;
1230 int insn_len = 2;
1231
1232 rs = dc->op1;
1233 is_imm = rs == 15 && dc->postinc;
1234
1235 /* Load [$rs] onto T1. */
1236 if (is_imm) {
1237 insn_len = 2 + memsize;
1238 if (memsize == 1) {
1239 insn_len++;
1240 }
1241
1242 imm = cris_fetch(env, dc, dc->pc + 2, memsize, s_ext);
1243 tcg_gen_movi_tl(dst, imm);
1244 dc->postinc = 0;
1245 } else {
1246 cris_flush_cc_state(dc);
1247 gen_load(dc, dst, cpu_R[rs], memsize, 0);
1248 if (s_ext) {
1249 t_gen_sext(dst, dst, memsize);
1250 } else {
1251 t_gen_zext(dst, dst, memsize);
1252 }
1253 }
1254 return insn_len;
1255 }
1256
1257 /* Prepare T0 and T1 for a memory + alu operation.
1258 s_ext decides if the operand1 should be sign-extended or zero-extended when
1259 needed. */
1260 static int dec_prep_alu_m(CPUCRISState *env, DisasContext *dc,
1261 int s_ext, int memsize, TCGv dst, TCGv src)
1262 {
1263 int insn_len;
1264
1265 insn_len = dec_prep_move_m(env, dc, s_ext, memsize, src);
1266 tcg_gen_mov_tl(dst, cpu_R[dc->op2]);
1267 return insn_len;
1268 }
1269
1270 #if DISAS_CRIS
1271 static const char *cc_name(int cc)
1272 {
1273 static const char *cc_names[16] = {
1274 "cc", "cs", "ne", "eq", "vc", "vs", "pl", "mi",
1275 "ls", "hi", "ge", "lt", "gt", "le", "a", "p"
1276 };
1277 assert(cc < 16);
1278 return cc_names[cc];
1279 }
1280 #endif
1281
1282 /* Start of insn decoders. */
1283
1284 static int dec_bccq(CPUCRISState *env, DisasContext *dc)
1285 {
1286 int32_t offset;
1287 int sign;
1288 uint32_t cond = dc->op2;
1289
1290 offset = EXTRACT_FIELD(dc->ir, 1, 7);
1291 sign = EXTRACT_FIELD(dc->ir, 0, 0);
1292
1293 offset *= 2;
1294 offset |= sign << 8;
1295 offset = sign_extend(offset, 8);
1296
1297 LOG_DIS("b%s %x\n", cc_name(cond), dc->pc + offset);
1298
1299 /* op2 holds the condition-code. */
1300 cris_cc_mask(dc, 0);
1301 cris_prepare_cc_branch(dc, offset, cond);
1302 return 2;
1303 }
1304 static int dec_addoq(CPUCRISState *env, DisasContext *dc)
1305 {
1306 int32_t imm;
1307
1308 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 7);
1309 imm = sign_extend(dc->op1, 7);
1310
1311 LOG_DIS("addoq %d, $r%u\n", imm, dc->op2);
1312 cris_cc_mask(dc, 0);
1313 /* Fetch register operand, */
1314 tcg_gen_addi_tl(cpu_R[R_ACR], cpu_R[dc->op2], imm);
1315
1316 return 2;
1317 }
1318 static int dec_addq(CPUCRISState *env, DisasContext *dc)
1319 {
1320 LOG_DIS("addq %u, $r%u\n", dc->op1, dc->op2);
1321
1322 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
1323
1324 cris_cc_mask(dc, CC_MASK_NZVC);
1325
1326 cris_alu(dc, CC_OP_ADD,
1327 cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(dc->op1), 4);
1328 return 2;
1329 }
1330 static int dec_moveq(CPUCRISState *env, DisasContext *dc)
1331 {
1332 uint32_t imm;
1333
1334 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
1335 imm = sign_extend(dc->op1, 5);
1336 LOG_DIS("moveq %d, $r%u\n", imm, dc->op2);
1337
1338 tcg_gen_movi_tl(cpu_R[dc->op2], imm);
1339 return 2;
1340 }
1341 static int dec_subq(CPUCRISState *env, DisasContext *dc)
1342 {
1343 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
1344
1345 LOG_DIS("subq %u, $r%u\n", dc->op1, dc->op2);
1346
1347 cris_cc_mask(dc, CC_MASK_NZVC);
1348 cris_alu(dc, CC_OP_SUB,
1349 cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(dc->op1), 4);
1350 return 2;
1351 }
1352 static int dec_cmpq(CPUCRISState *env, DisasContext *dc)
1353 {
1354 uint32_t imm;
1355 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
1356 imm = sign_extend(dc->op1, 5);
1357
1358 LOG_DIS("cmpq %d, $r%d\n", imm, dc->op2);
1359 cris_cc_mask(dc, CC_MASK_NZVC);
1360
1361 cris_alu(dc, CC_OP_CMP,
1362 cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(imm), 4);
1363 return 2;
1364 }
1365 static int dec_andq(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("andq %d, $r%d\n", imm, dc->op2);
1372 cris_cc_mask(dc, CC_MASK_NZ);
1373
1374 cris_alu(dc, CC_OP_AND,
1375 cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(imm), 4);
1376 return 2;
1377 }
1378 static int dec_orq(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 LOG_DIS("orq %d, $r%d\n", imm, dc->op2);
1384 cris_cc_mask(dc, CC_MASK_NZ);
1385
1386 cris_alu(dc, CC_OP_OR,
1387 cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(imm), 4);
1388 return 2;
1389 }
1390 static int dec_btstq(CPUCRISState *env, DisasContext *dc)
1391 {
1392 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
1393 LOG_DIS("btstq %u, $r%d\n", dc->op1, dc->op2);
1394
1395 cris_cc_mask(dc, CC_MASK_NZ);
1396 cris_evaluate_flags(dc);
1397 gen_helper_btst(cpu_PR[PR_CCS], cpu_env, cpu_R[dc->op2],
1398 tcg_const_tl(dc->op1), cpu_PR[PR_CCS]);
1399 cris_alu(dc, CC_OP_MOVE,
1400 cpu_R[dc->op2], cpu_R[dc->op2], cpu_R[dc->op2], 4);
1401 cris_update_cc_op(dc, CC_OP_FLAGS, 4);
1402 dc->flags_uptodate = 1;
1403 return 2;
1404 }
1405 static int dec_asrq(CPUCRISState *env, DisasContext *dc)
1406 {
1407 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
1408 LOG_DIS("asrq %u, $r%d\n", dc->op1, dc->op2);
1409 cris_cc_mask(dc, CC_MASK_NZ);
1410
1411 tcg_gen_sari_tl(cpu_R[dc->op2], cpu_R[dc->op2], dc->op1);
1412 cris_alu(dc, CC_OP_MOVE,
1413 cpu_R[dc->op2],
1414 cpu_R[dc->op2], cpu_R[dc->op2], 4);
1415 return 2;
1416 }
1417 static int dec_lslq(CPUCRISState *env, DisasContext *dc)
1418 {
1419 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
1420 LOG_DIS("lslq %u, $r%d\n", dc->op1, dc->op2);
1421
1422 cris_cc_mask(dc, CC_MASK_NZ);
1423
1424 tcg_gen_shli_tl(cpu_R[dc->op2], cpu_R[dc->op2], dc->op1);
1425
1426 cris_alu(dc, CC_OP_MOVE,
1427 cpu_R[dc->op2],
1428 cpu_R[dc->op2], cpu_R[dc->op2], 4);
1429 return 2;
1430 }
1431 static int dec_lsrq(CPUCRISState *env, DisasContext *dc)
1432 {
1433 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
1434 LOG_DIS("lsrq %u, $r%d\n", dc->op1, dc->op2);
1435
1436 cris_cc_mask(dc, CC_MASK_NZ);
1437
1438 tcg_gen_shri_tl(cpu_R[dc->op2], cpu_R[dc->op2], dc->op1);
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
1445 static int dec_move_r(CPUCRISState *env, DisasContext *dc)
1446 {
1447 int size = memsize_zz(dc);
1448
1449 LOG_DIS("move.%c $r%u, $r%u\n",
1450 memsize_char(size), dc->op1, dc->op2);
1451
1452 cris_cc_mask(dc, CC_MASK_NZ);
1453 if (size == 4) {
1454 dec_prep_move_r(dc, dc->op1, dc->op2, size, 0, cpu_R[dc->op2]);
1455 cris_cc_mask(dc, CC_MASK_NZ);
1456 cris_update_cc_op(dc, CC_OP_MOVE, 4);
1457 cris_update_cc_x(dc);
1458 cris_update_result(dc, cpu_R[dc->op2]);
1459 } else {
1460 TCGv t0;
1461
1462 t0 = tcg_temp_new();
1463 dec_prep_move_r(dc, dc->op1, dc->op2, size, 0, t0);
1464 cris_alu(dc, CC_OP_MOVE,
1465 cpu_R[dc->op2],
1466 cpu_R[dc->op2], t0, size);
1467 tcg_temp_free(t0);
1468 }
1469 return 2;
1470 }
1471
1472 static int dec_scc_r(CPUCRISState *env, DisasContext *dc)
1473 {
1474 int cond = dc->op2;
1475
1476 LOG_DIS("s%s $r%u\n",
1477 cc_name(cond), dc->op1);
1478
1479 gen_tst_cc(dc, cpu_R[dc->op1], cond);
1480 tcg_gen_setcondi_tl(TCG_COND_NE, cpu_R[dc->op1], cpu_R[dc->op1], 0);
1481
1482 cris_cc_mask(dc, 0);
1483 return 2;
1484 }
1485
1486 static inline void cris_alu_alloc_temps(DisasContext *dc, int size, TCGv *t)
1487 {
1488 if (size == 4) {
1489 t[0] = cpu_R[dc->op2];
1490 t[1] = cpu_R[dc->op1];
1491 } else {
1492 t[0] = tcg_temp_new();
1493 t[1] = tcg_temp_new();
1494 }
1495 }
1496
1497 static inline void cris_alu_free_temps(DisasContext *dc, int size, TCGv *t)
1498 {
1499 if (size != 4) {
1500 tcg_temp_free(t[0]);
1501 tcg_temp_free(t[1]);
1502 }
1503 }
1504
1505 static int dec_and_r(CPUCRISState *env, DisasContext *dc)
1506 {
1507 TCGv t[2];
1508 int size = memsize_zz(dc);
1509
1510 LOG_DIS("and.%c $r%u, $r%u\n",
1511 memsize_char(size), dc->op1, dc->op2);
1512
1513 cris_cc_mask(dc, CC_MASK_NZ);
1514
1515 cris_alu_alloc_temps(dc, size, t);
1516 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1517 cris_alu(dc, CC_OP_AND, cpu_R[dc->op2], t[0], t[1], size);
1518 cris_alu_free_temps(dc, size, t);
1519 return 2;
1520 }
1521
1522 static int dec_lz_r(CPUCRISState *env, DisasContext *dc)
1523 {
1524 TCGv t0;
1525 LOG_DIS("lz $r%u, $r%u\n",
1526 dc->op1, dc->op2);
1527 cris_cc_mask(dc, CC_MASK_NZ);
1528 t0 = tcg_temp_new();
1529 dec_prep_alu_r(dc, dc->op1, dc->op2, 4, 0, cpu_R[dc->op2], t0);
1530 cris_alu(dc, CC_OP_LZ, cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
1531 tcg_temp_free(t0);
1532 return 2;
1533 }
1534
1535 static int dec_lsl_r(CPUCRISState *env, DisasContext *dc)
1536 {
1537 TCGv t[2];
1538 int size = memsize_zz(dc);
1539
1540 LOG_DIS("lsl.%c $r%u, $r%u\n",
1541 memsize_char(size), dc->op1, dc->op2);
1542
1543 cris_cc_mask(dc, CC_MASK_NZ);
1544 cris_alu_alloc_temps(dc, size, t);
1545 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1546 tcg_gen_andi_tl(t[1], t[1], 63);
1547 cris_alu(dc, CC_OP_LSL, cpu_R[dc->op2], t[0], t[1], size);
1548 cris_alu_alloc_temps(dc, size, t);
1549 return 2;
1550 }
1551
1552 static int dec_lsr_r(CPUCRISState *env, DisasContext *dc)
1553 {
1554 TCGv t[2];
1555 int size = memsize_zz(dc);
1556
1557 LOG_DIS("lsr.%c $r%u, $r%u\n",
1558 memsize_char(size), dc->op1, dc->op2);
1559
1560 cris_cc_mask(dc, CC_MASK_NZ);
1561 cris_alu_alloc_temps(dc, size, t);
1562 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1563 tcg_gen_andi_tl(t[1], t[1], 63);
1564 cris_alu(dc, CC_OP_LSR, cpu_R[dc->op2], t[0], t[1], size);
1565 cris_alu_free_temps(dc, size, t);
1566 return 2;
1567 }
1568
1569 static int dec_asr_r(CPUCRISState *env, DisasContext *dc)
1570 {
1571 TCGv t[2];
1572 int size = memsize_zz(dc);
1573
1574 LOG_DIS("asr.%c $r%u, $r%u\n",
1575 memsize_char(size), dc->op1, dc->op2);
1576
1577 cris_cc_mask(dc, CC_MASK_NZ);
1578 cris_alu_alloc_temps(dc, size, t);
1579 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 1, t[0], t[1]);
1580 tcg_gen_andi_tl(t[1], t[1], 63);
1581 cris_alu(dc, CC_OP_ASR, cpu_R[dc->op2], t[0], t[1], size);
1582 cris_alu_free_temps(dc, size, t);
1583 return 2;
1584 }
1585
1586 static int dec_muls_r(CPUCRISState *env, DisasContext *dc)
1587 {
1588 TCGv t[2];
1589 int size = memsize_zz(dc);
1590
1591 LOG_DIS("muls.%c $r%u, $r%u\n",
1592 memsize_char(size), dc->op1, dc->op2);
1593 cris_cc_mask(dc, CC_MASK_NZV);
1594 cris_alu_alloc_temps(dc, size, t);
1595 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 1, t[0], t[1]);
1596
1597 cris_alu(dc, CC_OP_MULS, cpu_R[dc->op2], t[0], t[1], 4);
1598 cris_alu_free_temps(dc, size, t);
1599 return 2;
1600 }
1601
1602 static int dec_mulu_r(CPUCRISState *env, DisasContext *dc)
1603 {
1604 TCGv t[2];
1605 int size = memsize_zz(dc);
1606
1607 LOG_DIS("mulu.%c $r%u, $r%u\n",
1608 memsize_char(size), dc->op1, dc->op2);
1609 cris_cc_mask(dc, CC_MASK_NZV);
1610 cris_alu_alloc_temps(dc, size, t);
1611 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1612
1613 cris_alu(dc, CC_OP_MULU, cpu_R[dc->op2], t[0], t[1], 4);
1614 cris_alu_alloc_temps(dc, size, t);
1615 return 2;
1616 }
1617
1618
1619 static int dec_dstep_r(CPUCRISState *env, DisasContext *dc)
1620 {
1621 LOG_DIS("dstep $r%u, $r%u\n", dc->op1, dc->op2);
1622 cris_cc_mask(dc, CC_MASK_NZ);
1623 cris_alu(dc, CC_OP_DSTEP,
1624 cpu_R[dc->op2], cpu_R[dc->op2], cpu_R[dc->op1], 4);
1625 return 2;
1626 }
1627
1628 static int dec_xor_r(CPUCRISState *env, DisasContext *dc)
1629 {
1630 TCGv t[2];
1631 int size = memsize_zz(dc);
1632 LOG_DIS("xor.%c $r%u, $r%u\n",
1633 memsize_char(size), dc->op1, dc->op2);
1634 BUG_ON(size != 4); /* xor is dword. */
1635 cris_cc_mask(dc, CC_MASK_NZ);
1636 cris_alu_alloc_temps(dc, size, t);
1637 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1638
1639 cris_alu(dc, CC_OP_XOR, cpu_R[dc->op2], t[0], t[1], 4);
1640 cris_alu_free_temps(dc, size, t);
1641 return 2;
1642 }
1643
1644 static int dec_bound_r(CPUCRISState *env, DisasContext *dc)
1645 {
1646 TCGv l0;
1647 int size = memsize_zz(dc);
1648 LOG_DIS("bound.%c $r%u, $r%u\n",
1649 memsize_char(size), dc->op1, dc->op2);
1650 cris_cc_mask(dc, CC_MASK_NZ);
1651 l0 = tcg_temp_local_new();
1652 dec_prep_move_r(dc, dc->op1, dc->op2, size, 0, l0);
1653 cris_alu(dc, CC_OP_BOUND, cpu_R[dc->op2], cpu_R[dc->op2], l0, 4);
1654 tcg_temp_free(l0);
1655 return 2;
1656 }
1657
1658 static int dec_cmp_r(CPUCRISState *env, DisasContext *dc)
1659 {
1660 TCGv t[2];
1661 int size = memsize_zz(dc);
1662 LOG_DIS("cmp.%c $r%u, $r%u\n",
1663 memsize_char(size), dc->op1, dc->op2);
1664 cris_cc_mask(dc, CC_MASK_NZVC);
1665 cris_alu_alloc_temps(dc, size, t);
1666 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1667
1668 cris_alu(dc, CC_OP_CMP, cpu_R[dc->op2], t[0], t[1], size);
1669 cris_alu_free_temps(dc, size, t);
1670 return 2;
1671 }
1672
1673 static int dec_abs_r(CPUCRISState *env, DisasContext *dc)
1674 {
1675 TCGv t0;
1676
1677 LOG_DIS("abs $r%u, $r%u\n",
1678 dc->op1, dc->op2);
1679 cris_cc_mask(dc, CC_MASK_NZ);
1680
1681 t0 = tcg_temp_new();
1682 tcg_gen_sari_tl(t0, cpu_R[dc->op1], 31);
1683 tcg_gen_xor_tl(cpu_R[dc->op2], cpu_R[dc->op1], t0);
1684 tcg_gen_sub_tl(cpu_R[dc->op2], cpu_R[dc->op2], t0);
1685 tcg_temp_free(t0);
1686
1687 cris_alu(dc, CC_OP_MOVE,
1688 cpu_R[dc->op2], cpu_R[dc->op2], cpu_R[dc->op2], 4);
1689 return 2;
1690 }
1691
1692 static int dec_add_r(CPUCRISState *env, DisasContext *dc)
1693 {
1694 TCGv t[2];
1695 int size = memsize_zz(dc);
1696 LOG_DIS("add.%c $r%u, $r%u\n",
1697 memsize_char(size), dc->op1, dc->op2);
1698 cris_cc_mask(dc, CC_MASK_NZVC);
1699 cris_alu_alloc_temps(dc, size, t);
1700 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1701
1702 cris_alu(dc, CC_OP_ADD, cpu_R[dc->op2], t[0], t[1], size);
1703 cris_alu_free_temps(dc, size, t);
1704 return 2;
1705 }
1706
1707 static int dec_addc_r(CPUCRISState *env, DisasContext *dc)
1708 {
1709 LOG_DIS("addc $r%u, $r%u\n",
1710 dc->op1, dc->op2);
1711 cris_evaluate_flags(dc);
1712 /* Set for this insn. */
1713 dc->flagx_known = 1;
1714 dc->flags_x = X_FLAG;
1715
1716 cris_cc_mask(dc, CC_MASK_NZVC);
1717 cris_alu(dc, CC_OP_ADDC,
1718 cpu_R[dc->op2], cpu_R[dc->op2], cpu_R[dc->op1], 4);
1719 return 2;
1720 }
1721
1722 static int dec_mcp_r(CPUCRISState *env, DisasContext *dc)
1723 {
1724 LOG_DIS("mcp $p%u, $r%u\n",
1725 dc->op2, dc->op1);
1726 cris_evaluate_flags(dc);
1727 cris_cc_mask(dc, CC_MASK_RNZV);
1728 cris_alu(dc, CC_OP_MCP,
1729 cpu_R[dc->op1], cpu_R[dc->op1], cpu_PR[dc->op2], 4);
1730 return 2;
1731 }
1732
1733 #if DISAS_CRIS
1734 static char * swapmode_name(int mode, char *modename) {
1735 int i = 0;
1736 if (mode & 8) {
1737 modename[i++] = 'n';
1738 }
1739 if (mode & 4) {
1740 modename[i++] = 'w';
1741 }
1742 if (mode & 2) {
1743 modename[i++] = 'b';
1744 }
1745 if (mode & 1) {
1746 modename[i++] = 'r';
1747 }
1748 modename[i++] = 0;
1749 return modename;
1750 }
1751 #endif
1752
1753 static int dec_swap_r(CPUCRISState *env, DisasContext *dc)
1754 {
1755 TCGv t0;
1756 #if DISAS_CRIS
1757 char modename[4];
1758 #endif
1759 LOG_DIS("swap%s $r%u\n",
1760 swapmode_name(dc->op2, modename), dc->op1);
1761
1762 cris_cc_mask(dc, CC_MASK_NZ);
1763 t0 = tcg_temp_new();
1764 tcg_gen_mov_tl(t0, cpu_R[dc->op1]);
1765 if (dc->op2 & 8) {
1766 tcg_gen_not_tl(t0, t0);
1767 }
1768 if (dc->op2 & 4) {
1769 t_gen_swapw(t0, t0);
1770 }
1771 if (dc->op2 & 2) {
1772 t_gen_swapb(t0, t0);
1773 }
1774 if (dc->op2 & 1) {
1775 t_gen_swapr(t0, t0);
1776 }
1777 cris_alu(dc, CC_OP_MOVE, cpu_R[dc->op1], cpu_R[dc->op1], t0, 4);
1778 tcg_temp_free(t0);
1779 return 2;
1780 }
1781
1782 static int dec_or_r(CPUCRISState *env, DisasContext *dc)
1783 {
1784 TCGv t[2];
1785 int size = memsize_zz(dc);
1786 LOG_DIS("or.%c $r%u, $r%u\n",
1787 memsize_char(size), dc->op1, dc->op2);
1788 cris_cc_mask(dc, CC_MASK_NZ);
1789 cris_alu_alloc_temps(dc, size, t);
1790 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1791 cris_alu(dc, CC_OP_OR, cpu_R[dc->op2], t[0], t[1], size);
1792 cris_alu_free_temps(dc, size, t);
1793 return 2;
1794 }
1795
1796 static int dec_addi_r(CPUCRISState *env, DisasContext *dc)
1797 {
1798 TCGv t0;
1799 LOG_DIS("addi.%c $r%u, $r%u\n",
1800 memsize_char(memsize_zz(dc)), dc->op2, dc->op1);
1801 cris_cc_mask(dc, 0);
1802 t0 = tcg_temp_new();
1803 tcg_gen_shl_tl(t0, cpu_R[dc->op2], tcg_const_tl(dc->zzsize));
1804 tcg_gen_add_tl(cpu_R[dc->op1], cpu_R[dc->op1], t0);
1805 tcg_temp_free(t0);
1806 return 2;
1807 }
1808
1809 static int dec_addi_acr(CPUCRISState *env, DisasContext *dc)
1810 {
1811 TCGv t0;
1812 LOG_DIS("addi.%c $r%u, $r%u, $acr\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[R_ACR], cpu_R[dc->op1], t0);
1818 tcg_temp_free(t0);
1819 return 2;
1820 }
1821
1822 static int dec_neg_r(CPUCRISState *env, DisasContext *dc)
1823 {
1824 TCGv t[2];
1825 int size = memsize_zz(dc);
1826 LOG_DIS("neg.%c $r%u, $r%u\n",
1827 memsize_char(size), dc->op1, dc->op2);
1828 cris_cc_mask(dc, CC_MASK_NZVC);
1829 cris_alu_alloc_temps(dc, size, t);
1830 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1831
1832 cris_alu(dc, CC_OP_NEG, cpu_R[dc->op2], t[0], t[1], size);
1833 cris_alu_free_temps(dc, size, t);
1834 return 2;
1835 }
1836
1837 static int dec_btst_r(CPUCRISState *env, DisasContext *dc)
1838 {
1839 LOG_DIS("btst $r%u, $r%u\n",
1840 dc->op1, dc->op2);
1841 cris_cc_mask(dc, CC_MASK_NZ);
1842 cris_evaluate_flags(dc);
1843 gen_helper_btst(cpu_PR[PR_CCS], cpu_env, cpu_R[dc->op2],
1844 cpu_R[dc->op1], cpu_PR[PR_CCS]);
1845 cris_alu(dc, CC_OP_MOVE, cpu_R[dc->op2],
1846 cpu_R[dc->op2], cpu_R[dc->op2], 4);
1847 cris_update_cc_op(dc, CC_OP_FLAGS, 4);
1848 dc->flags_uptodate = 1;
1849 return 2;
1850 }
1851
1852 static int dec_sub_r(CPUCRISState *env, DisasContext *dc)
1853 {
1854 TCGv t[2];
1855 int size = memsize_zz(dc);
1856 LOG_DIS("sub.%c $r%u, $r%u\n",
1857 memsize_char(size), dc->op1, dc->op2);
1858 cris_cc_mask(dc, CC_MASK_NZVC);
1859 cris_alu_alloc_temps(dc, size, t);
1860 dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
1861 cris_alu(dc, CC_OP_SUB, cpu_R[dc->op2], t[0], t[1], size);
1862 cris_alu_free_temps(dc, size, t);
1863 return 2;
1864 }
1865
1866 /* Zero extension. From size to dword. */
1867 static int dec_movu_r(CPUCRISState *env, DisasContext *dc)
1868 {
1869 TCGv t0;
1870 int size = memsize_z(dc);
1871 LOG_DIS("movu.%c $r%u, $r%u\n",
1872 memsize_char(size),
1873 dc->op1, dc->op2);
1874
1875 cris_cc_mask(dc, CC_MASK_NZ);
1876 t0 = tcg_temp_new();
1877 dec_prep_move_r(dc, dc->op1, dc->op2, size, 0, t0);
1878 cris_alu(dc, CC_OP_MOVE, cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
1879 tcg_temp_free(t0);
1880 return 2;
1881 }
1882
1883 /* Sign extension. From size to dword. */
1884 static int dec_movs_r(CPUCRISState *env, DisasContext *dc)
1885 {
1886 TCGv t0;
1887 int size = memsize_z(dc);
1888 LOG_DIS("movs.%c $r%u, $r%u\n",
1889 memsize_char(size),
1890 dc->op1, dc->op2);
1891
1892 cris_cc_mask(dc, CC_MASK_NZ);
1893 t0 = tcg_temp_new();
1894 /* Size can only be qi or hi. */
1895 t_gen_sext(t0, cpu_R[dc->op1], size);
1896 cris_alu(dc, CC_OP_MOVE,
1897 cpu_R[dc->op2], cpu_R[dc->op1], t0, 4);
1898 tcg_temp_free(t0);
1899 return 2;
1900 }
1901
1902 /* zero extension. From size to dword. */
1903 static int dec_addu_r(CPUCRISState *env, DisasContext *dc)
1904 {
1905 TCGv t0;
1906 int size = memsize_z(dc);
1907 LOG_DIS("addu.%c $r%u, $r%u\n",
1908 memsize_char(size),
1909 dc->op1, dc->op2);
1910
1911 cris_cc_mask(dc, CC_MASK_NZVC);
1912 t0 = tcg_temp_new();
1913 /* Size can only be qi or hi. */
1914 t_gen_zext(t0, cpu_R[dc->op1], size);
1915 cris_alu(dc, CC_OP_ADD, cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
1916 tcg_temp_free(t0);
1917 return 2;
1918 }
1919
1920 /* Sign extension. From size to dword. */
1921 static int dec_adds_r(CPUCRISState *env, DisasContext *dc)
1922 {
1923 TCGv t0;
1924 int size = memsize_z(dc);
1925 LOG_DIS("adds.%c $r%u, $r%u\n",
1926 memsize_char(size),
1927 dc->op1, dc->op2);
1928
1929 cris_cc_mask(dc, CC_MASK_NZVC);
1930 t0 = tcg_temp_new();
1931 /* Size can only be qi or hi. */
1932 t_gen_sext(t0, cpu_R[dc->op1], size);
1933 cris_alu(dc, CC_OP_ADD,
1934 cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
1935 tcg_temp_free(t0);
1936 return 2;
1937 }
1938
1939 /* Zero extension. From size to dword. */
1940 static int dec_subu_r(CPUCRISState *env, DisasContext *dc)
1941 {
1942 TCGv t0;
1943 int size = memsize_z(dc);
1944 LOG_DIS("subu.%c $r%u, $r%u\n",
1945 memsize_char(size),
1946 dc->op1, dc->op2);
1947
1948 cris_cc_mask(dc, CC_MASK_NZVC);
1949 t0 = tcg_temp_new();
1950 /* Size can only be qi or hi. */
1951 t_gen_zext(t0, cpu_R[dc->op1], size);
1952 cris_alu(dc, CC_OP_SUB,
1953 cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
1954 tcg_temp_free(t0);
1955 return 2;
1956 }
1957
1958 /* Sign extension. From size to dword. */
1959 static int dec_subs_r(CPUCRISState *env, DisasContext *dc)
1960 {
1961 TCGv t0;
1962 int size = memsize_z(dc);
1963 LOG_DIS("subs.%c $r%u, $r%u\n",
1964 memsize_char(size),
1965 dc->op1, dc->op2);
1966
1967 cris_cc_mask(dc, CC_MASK_NZVC);
1968 t0 = tcg_temp_new();
1969 /* Size can only be qi or hi. */
1970 t_gen_sext(t0, cpu_R[dc->op1], size);
1971 cris_alu(dc, CC_OP_SUB,
1972 cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
1973 tcg_temp_free(t0);
1974 return 2;
1975 }
1976
1977 static int dec_setclrf(CPUCRISState *env, DisasContext *dc)
1978 {
1979 uint32_t flags;
1980 int set = (~dc->opcode >> 2) & 1;
1981
1982
1983 flags = (EXTRACT_FIELD(dc->ir, 12, 15) << 4)
1984 | EXTRACT_FIELD(dc->ir, 0, 3);
1985 if (set && flags == 0) {
1986 LOG_DIS("nop\n");
1987 return 2;
1988 } else if (!set && (flags & 0x20)) {
1989 LOG_DIS("di\n");
1990 } else {
1991 LOG_DIS("%sf %x\n", set ? "set" : "clr", flags);
1992 }
1993
1994 /* User space is not allowed to touch these. Silently ignore. */
1995 if (dc->tb_flags & U_FLAG) {
1996 flags &= ~(S_FLAG | I_FLAG | U_FLAG);
1997 }
1998
1999 if (flags & X_FLAG) {
2000 dc->flagx_known = 1;
2001 if (set) {
2002 dc->flags_x = X_FLAG;
2003 } else {
2004 dc->flags_x = 0;
2005 }
2006 }
2007
2008 /* Break the TB if any of the SPI flag changes. */
2009 if (flags & (P_FLAG | S_FLAG)) {
2010 tcg_gen_movi_tl(env_pc, dc->pc + 2);
2011 dc->is_jmp = DISAS_UPDATE;
2012 dc->cpustate_changed = 1;
2013 }
2014
2015 /* For the I flag, only act on posedge. */
2016 if ((flags & I_FLAG)) {
2017 tcg_gen_movi_tl(env_pc, dc->pc + 2);
2018 dc->is_jmp = DISAS_UPDATE;
2019 dc->cpustate_changed = 1;
2020 }
2021
2022
2023 /* Simply decode the flags. */
2024 cris_evaluate_flags(dc);
2025 cris_update_cc_op(dc, CC_OP_FLAGS, 4);
2026 cris_update_cc_x(dc);
2027 tcg_gen_movi_tl(cc_op, dc->cc_op);
2028
2029 if (set) {
2030 if (!(dc->tb_flags & U_FLAG) && (flags & U_FLAG)) {
2031 /* Enter user mode. */
2032 t_gen_mov_env_TN(ksp, cpu_R[R_SP]);
2033 tcg_gen_mov_tl(cpu_R[R_SP], cpu_PR[PR_USP]);
2034 dc->cpustate_changed = 1;
2035 }
2036 tcg_gen_ori_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], flags);
2037 } else {
2038 tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~flags);
2039 }
2040
2041 dc->flags_uptodate = 1;
2042 dc->clear_x = 0;
2043 return 2;
2044 }
2045
2046 static int dec_move_rs(CPUCRISState *env, DisasContext *dc)
2047 {
2048 LOG_DIS("move $r%u, $s%u\n", dc->op1, dc->op2);
2049 cris_cc_mask(dc, 0);
2050 gen_helper_movl_sreg_reg(cpu_env, tcg_const_tl(dc->op2),
2051 tcg_const_tl(dc->op1));
2052 return 2;
2053 }
2054 static int dec_move_sr(CPUCRISState *env, DisasContext *dc)
2055 {
2056 LOG_DIS("move $s%u, $r%u\n", dc->op2, dc->op1);
2057 cris_cc_mask(dc, 0);
2058 gen_helper_movl_reg_sreg(cpu_env, tcg_const_tl(dc->op1),
2059 tcg_const_tl(dc->op2));
2060 return 2;
2061 }
2062
2063 static int dec_move_rp(CPUCRISState *env, DisasContext *dc)
2064 {
2065 TCGv t[2];
2066 LOG_DIS("move $r%u, $p%u\n", dc->op1, dc->op2);
2067 cris_cc_mask(dc, 0);
2068
2069 t[0] = tcg_temp_new();
2070 if (dc->op2 == PR_CCS) {
2071 cris_evaluate_flags(dc);
2072 tcg_gen_mov_tl(t[0], cpu_R[dc->op1]);
2073 if (dc->tb_flags & U_FLAG) {
2074 t[1] = tcg_temp_new();
2075 /* User space is not allowed to touch all flags. */
2076 tcg_gen_andi_tl(t[0], t[0], 0x39f);
2077 tcg_gen_andi_tl(t[1], cpu_PR[PR_CCS], ~0x39f);
2078 tcg_gen_or_tl(t[0], t[1], t[0]);
2079 tcg_temp_free(t[1]);
2080 }
2081 } else {
2082 tcg_gen_mov_tl(t[0], cpu_R[dc->op1]);
2083 }
2084
2085 t_gen_mov_preg_TN(dc, dc->op2, t[0]);
2086 if (dc->op2 == PR_CCS) {
2087 cris_update_cc_op(dc, CC_OP_FLAGS, 4);
2088 dc->flags_uptodate = 1;
2089 }
2090 tcg_temp_free(t[0]);
2091 return 2;
2092 }
2093 static int dec_move_pr(CPUCRISState *env, DisasContext *dc)
2094 {
2095 TCGv t0;
2096 LOG_DIS("move $p%u, $r%u\n", dc->op2, dc->op1);
2097 cris_cc_mask(dc, 0);
2098
2099 if (dc->op2 == PR_CCS) {
2100 cris_evaluate_flags(dc);
2101 }
2102
2103 if (dc->op2 == PR_DZ) {
2104 tcg_gen_movi_tl(cpu_R[dc->op1], 0);
2105 } else {
2106 t0 = tcg_temp_new();
2107 t_gen_mov_TN_preg(t0, dc->op2);
2108 cris_alu(dc, CC_OP_MOVE,
2109 cpu_R[dc->op1], cpu_R[dc->op1], t0,
2110 preg_sizes[dc->op2]);
2111 tcg_temp_free(t0);
2112 }
2113 return 2;
2114 }
2115
2116 static int dec_move_mr(CPUCRISState *env, DisasContext *dc)
2117 {
2118 int memsize = memsize_zz(dc);
2119 int insn_len;
2120 LOG_DIS("move.%c [$r%u%s, $r%u\n",
2121 memsize_char(memsize),
2122 dc->op1, dc->postinc ? "+]" : "]",
2123 dc->op2);
2124
2125 if (memsize == 4) {
2126 insn_len = dec_prep_move_m(env, dc, 0, 4, cpu_R[dc->op2]);
2127 cris_cc_mask(dc, CC_MASK_NZ);
2128 cris_update_cc_op(dc, CC_OP_MOVE, 4);
2129 cris_update_cc_x(dc);
2130 cris_update_result(dc, cpu_R[dc->op2]);
2131 } else {
2132 TCGv t0;
2133
2134 t0 = tcg_temp_new();
2135 insn_len = dec_prep_move_m(env, dc, 0, memsize, t0);
2136 cris_cc_mask(dc, CC_MASK_NZ);
2137 cris_alu(dc, CC_OP_MOVE,
2138 cpu_R[dc->op2], cpu_R[dc->op2], t0, memsize);
2139 tcg_temp_free(t0);
2140 }
2141 do_postinc(dc, memsize);
2142 return insn_len;
2143 }
2144
2145 static inline void cris_alu_m_alloc_temps(TCGv *t)
2146 {
2147 t[0] = tcg_temp_new();
2148 t[1] = tcg_temp_new();
2149 }
2150
2151 static inline void cris_alu_m_free_temps(TCGv *t)
2152 {
2153 tcg_temp_free(t[0]);
2154 tcg_temp_free(t[1]);
2155 }
2156
2157 static int dec_movs_m(CPUCRISState *env, DisasContext *dc)
2158 {
2159 TCGv t[2];
2160 int memsize = memsize_z(dc);
2161 int insn_len;
2162 LOG_DIS("movs.%c [$r%u%s, $r%u\n",
2163 memsize_char(memsize),
2164 dc->op1, dc->postinc ? "+]" : "]",
2165 dc->op2);
2166
2167 cris_alu_m_alloc_temps(t);
2168 /* sign extend. */
2169 insn_len = dec_prep_alu_m(env, dc, 1, memsize, t[0], t[1]);
2170 cris_cc_mask(dc, CC_MASK_NZ);
2171 cris_alu(dc, CC_OP_MOVE,
2172 cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2173 do_postinc(dc, memsize);
2174 cris_alu_m_free_temps(t);
2175 return insn_len;
2176 }
2177
2178 static int dec_addu_m(CPUCRISState *env, DisasContext *dc)
2179 {
2180 TCGv t[2];
2181 int memsize = memsize_z(dc);
2182 int insn_len;
2183 LOG_DIS("addu.%c [$r%u%s, $r%u\n",
2184 memsize_char(memsize),
2185 dc->op1, dc->postinc ? "+]" : "]",
2186 dc->op2);
2187
2188 cris_alu_m_alloc_temps(t);
2189 /* sign extend. */
2190 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2191 cris_cc_mask(dc, CC_MASK_NZVC);
2192 cris_alu(dc, CC_OP_ADD,
2193 cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2194 do_postinc(dc, memsize);
2195 cris_alu_m_free_temps(t);
2196 return insn_len;
2197 }
2198
2199 static int dec_adds_m(CPUCRISState *env, DisasContext *dc)
2200 {
2201 TCGv t[2];
2202 int memsize = memsize_z(dc);
2203 int insn_len;
2204 LOG_DIS("adds.%c [$r%u%s, $r%u\n",
2205 memsize_char(memsize),
2206 dc->op1, dc->postinc ? "+]" : "]",
2207 dc->op2);
2208
2209 cris_alu_m_alloc_temps(t);
2210 /* sign extend. */
2211 insn_len = dec_prep_alu_m(env, dc, 1, memsize, t[0], t[1]);
2212 cris_cc_mask(dc, CC_MASK_NZVC);
2213 cris_alu(dc, CC_OP_ADD, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2214 do_postinc(dc, memsize);
2215 cris_alu_m_free_temps(t);
2216 return insn_len;
2217 }
2218
2219 static int dec_subu_m(CPUCRISState *env, DisasContext *dc)
2220 {
2221 TCGv t[2];
2222 int memsize = memsize_z(dc);
2223 int insn_len;
2224 LOG_DIS("subu.%c [$r%u%s, $r%u\n",
2225 memsize_char(memsize),
2226 dc->op1, dc->postinc ? "+]" : "]",
2227 dc->op2);
2228
2229 cris_alu_m_alloc_temps(t);
2230 /* sign extend. */
2231 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2232 cris_cc_mask(dc, CC_MASK_NZVC);
2233 cris_alu(dc, CC_OP_SUB, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2234 do_postinc(dc, memsize);
2235 cris_alu_m_free_temps(t);
2236 return insn_len;
2237 }
2238
2239 static int dec_subs_m(CPUCRISState *env, DisasContext *dc)
2240 {
2241 TCGv t[2];
2242 int memsize = memsize_z(dc);
2243 int insn_len;
2244 LOG_DIS("subs.%c [$r%u%s, $r%u\n",
2245 memsize_char(memsize),
2246 dc->op1, dc->postinc ? "+]" : "]",
2247 dc->op2);
2248
2249 cris_alu_m_alloc_temps(t);
2250 /* sign extend. */
2251 insn_len = dec_prep_alu_m(env, dc, 1, memsize, t[0], t[1]);
2252 cris_cc_mask(dc, CC_MASK_NZVC);
2253 cris_alu(dc, CC_OP_SUB, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2254 do_postinc(dc, memsize);
2255 cris_alu_m_free_temps(t);
2256 return insn_len;
2257 }
2258
2259 static int dec_movu_m(CPUCRISState *env, DisasContext *dc)
2260 {
2261 TCGv t[2];
2262 int memsize = memsize_z(dc);
2263 int insn_len;
2264
2265 LOG_DIS("movu.%c [$r%u%s, $r%u\n",
2266 memsize_char(memsize),
2267 dc->op1, dc->postinc ? "+]" : "]",
2268 dc->op2);
2269
2270 cris_alu_m_alloc_temps(t);
2271 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2272 cris_cc_mask(dc, CC_MASK_NZ);
2273 cris_alu(dc, CC_OP_MOVE, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2274 do_postinc(dc, memsize);
2275 cris_alu_m_free_temps(t);
2276 return insn_len;
2277 }
2278
2279 static int dec_cmpu_m(CPUCRISState *env, DisasContext *dc)
2280 {
2281 TCGv t[2];
2282 int memsize = memsize_z(dc);
2283 int insn_len;
2284 LOG_DIS("cmpu.%c [$r%u%s, $r%u\n",
2285 memsize_char(memsize),
2286 dc->op1, dc->postinc ? "+]" : "]",
2287 dc->op2);
2288
2289 cris_alu_m_alloc_temps(t);
2290 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2291 cris_cc_mask(dc, CC_MASK_NZVC);
2292 cris_alu(dc, CC_OP_CMP, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
2293 do_postinc(dc, memsize);
2294 cris_alu_m_free_temps(t);
2295 return insn_len;
2296 }
2297
2298 static int dec_cmps_m(CPUCRISState *env, DisasContext *dc)
2299 {
2300 TCGv t[2];
2301 int memsize = memsize_z(dc);
2302 int insn_len;
2303 LOG_DIS("cmps.%c [$r%u%s, $r%u\n",
2304 memsize_char(memsize),
2305 dc->op1, dc->postinc ? "+]" : "]",
2306 dc->op2);
2307
2308 cris_alu_m_alloc_temps(t);
2309 insn_len = dec_prep_alu_m(env, dc, 1, memsize, t[0], t[1]);
2310 cris_cc_mask(dc, CC_MASK_NZVC);
2311 cris_alu(dc, CC_OP_CMP,
2312 cpu_R[dc->op2], cpu_R[dc->op2], t[1],
2313 memsize_zz(dc));
2314 do_postinc(dc, memsize);
2315 cris_alu_m_free_temps(t);
2316 return insn_len;
2317 }
2318
2319 static int dec_cmp_m(CPUCRISState *env, DisasContext *dc)
2320 {
2321 TCGv t[2];
2322 int memsize = memsize_zz(dc);
2323 int insn_len;
2324 LOG_DIS("cmp.%c [$r%u%s, $r%u\n",
2325 memsize_char(memsize),
2326 dc->op1, dc->postinc ? "+]" : "]",
2327 dc->op2);
2328
2329 cris_alu_m_alloc_temps(t);
2330 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2331 cris_cc_mask(dc, CC_MASK_NZVC);
2332 cris_alu(dc, CC_OP_CMP,
2333 cpu_R[dc->op2], cpu_R[dc->op2], t[1],
2334 memsize_zz(dc));
2335 do_postinc(dc, memsize);
2336 cris_alu_m_free_temps(t);
2337 return insn_len;
2338 }
2339
2340 static int dec_test_m(CPUCRISState *env, DisasContext *dc)
2341 {
2342 TCGv t[2];
2343 int memsize = memsize_zz(dc);
2344 int insn_len;
2345 LOG_DIS("test.%c [$r%u%s] op2=%x\n",
2346 memsize_char(memsize),
2347 dc->op1, dc->postinc ? "+]" : "]",
2348 dc->op2);
2349
2350 cris_evaluate_flags(dc);
2351
2352 cris_alu_m_alloc_temps(t);
2353 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2354 cris_cc_mask(dc, CC_MASK_NZ);
2355 tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~3);
2356
2357 cris_alu(dc, CC_OP_CMP,
2358 cpu_R[dc->op2], t[1], tcg_const_tl(0), memsize_zz(dc));
2359 do_postinc(dc, memsize);
2360 cris_alu_m_free_temps(t);
2361 return insn_len;
2362 }
2363
2364 static int dec_and_m(CPUCRISState *env, DisasContext *dc)
2365 {
2366 TCGv t[2];
2367 int memsize = memsize_zz(dc);
2368 int insn_len;
2369 LOG_DIS("and.%c [$r%u%s, $r%u\n",
2370 memsize_char(memsize),
2371 dc->op1, dc->postinc ? "+]" : "]",
2372 dc->op2);
2373
2374 cris_alu_m_alloc_temps(t);
2375 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2376 cris_cc_mask(dc, CC_MASK_NZ);
2377 cris_alu(dc, CC_OP_AND, cpu_R[dc->op2], t[0], t[1], memsize_zz(dc));
2378 do_postinc(dc, memsize);
2379 cris_alu_m_free_temps(t);
2380 return insn_len;
2381 }
2382
2383 static int dec_add_m(CPUCRISState *env, DisasContext *dc)
2384 {
2385 TCGv t[2];
2386 int memsize = memsize_zz(dc);
2387 int insn_len;
2388 LOG_DIS("add.%c [$r%u%s, $r%u\n",
2389 memsize_char(memsize),
2390 dc->op1, dc->postinc ? "+]" : "]",
2391 dc->op2);
2392
2393 cris_alu_m_alloc_temps(t);
2394 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2395 cris_cc_mask(dc, CC_MASK_NZVC);
2396 cris_alu(dc, CC_OP_ADD,
2397 cpu_R[dc->op2], t[0], t[1], memsize_zz(dc));
2398 do_postinc(dc, memsize);
2399 cris_alu_m_free_temps(t);
2400 return insn_len;
2401 }
2402
2403 static int dec_addo_m(CPUCRISState *env, DisasContext *dc)
2404 {
2405 TCGv t[2];
2406 int memsize = memsize_zz(dc);
2407 int insn_len;
2408 LOG_DIS("add.%c [$r%u%s, $r%u\n",
2409 memsize_char(memsize),
2410 dc->op1, dc->postinc ? "+]" : "]",
2411 dc->op2);
2412
2413 cris_alu_m_alloc_temps(t);
2414 insn_len = dec_prep_alu_m(env, dc, 1, memsize, t[0], t[1]);
2415 cris_cc_mask(dc, 0);
2416 cris_alu(dc, CC_OP_ADD, cpu_R[R_ACR], t[0], t[1], 4);
2417 do_postinc(dc, memsize);
2418 cris_alu_m_free_temps(t);
2419 return insn_len;
2420 }
2421
2422 static int dec_bound_m(CPUCRISState *env, DisasContext *dc)
2423 {
2424 TCGv l[2];
2425 int memsize = memsize_zz(dc);
2426 int insn_len;
2427 LOG_DIS("bound.%c [$r%u%s, $r%u\n",
2428 memsize_char(memsize),
2429 dc->op1, dc->postinc ? "+]" : "]",
2430 dc->op2);
2431
2432 l[0] = tcg_temp_local_new();
2433 l[1] = tcg_temp_local_new();
2434 insn_len = dec_prep_alu_m(env, dc, 0, memsize, l[0], l[1]);
2435 cris_cc_mask(dc, CC_MASK_NZ);
2436 cris_alu(dc, CC_OP_BOUND, cpu_R[dc->op2], l[0], l[1], 4);
2437 do_postinc(dc, memsize);
2438 tcg_temp_free(l[0]);
2439 tcg_temp_free(l[1]);
2440 return insn_len;
2441 }
2442
2443 static int dec_addc_mr(CPUCRISState *env, DisasContext *dc)
2444 {
2445 TCGv t[2];
2446 int insn_len = 2;
2447 LOG_DIS("addc [$r%u%s, $r%u\n",
2448 dc->op1, dc->postinc ? "+]" : "]",
2449 dc->op2);
2450
2451 cris_evaluate_flags(dc);
2452
2453 /* Set for this insn. */
2454 dc->flagx_known = 1;
2455 dc->flags_x = X_FLAG;
2456
2457 cris_alu_m_alloc_temps(t);
2458 insn_len = dec_prep_alu_m(env, dc, 0, 4, t[0], t[1]);
2459 cris_cc_mask(dc, CC_MASK_NZVC);
2460 cris_alu(dc, CC_OP_ADDC, cpu_R[dc->op2], t[0], t[1], 4);
2461 do_postinc(dc, 4);
2462 cris_alu_m_free_temps(t);
2463 return insn_len;
2464 }
2465
2466 static int dec_sub_m(CPUCRISState *env, DisasContext *dc)
2467 {
2468 TCGv t[2];
2469 int memsize = memsize_zz(dc);
2470 int insn_len;
2471 LOG_DIS("sub.%c [$r%u%s, $r%u ir=%x zz=%x\n",
2472 memsize_char(memsize),
2473 dc->op1, dc->postinc ? "+]" : "]",
2474 dc->op2, dc->ir, dc->zzsize);
2475
2476 cris_alu_m_alloc_temps(t);
2477 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2478 cris_cc_mask(dc, CC_MASK_NZVC);
2479 cris_alu(dc, CC_OP_SUB, cpu_R[dc->op2], t[0], t[1], memsize);
2480 do_postinc(dc, memsize);
2481 cris_alu_m_free_temps(t);
2482 return insn_len;
2483 }
2484
2485 static int dec_or_m(CPUCRISState *env, DisasContext *dc)
2486 {
2487 TCGv t[2];
2488 int memsize = memsize_zz(dc);
2489 int insn_len;
2490 LOG_DIS("or.%c [$r%u%s, $r%u pc=%x\n",
2491 memsize_char(memsize),
2492 dc->op1, dc->postinc ? "+]" : "]",
2493 dc->op2, dc->pc);
2494
2495 cris_alu_m_alloc_temps(t);
2496 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2497 cris_cc_mask(dc, CC_MASK_NZ);
2498 cris_alu(dc, CC_OP_OR,
2499 cpu_R[dc->op2], t[0], t[1], memsize_zz(dc));
2500 do_postinc(dc, memsize);
2501 cris_alu_m_free_temps(t);
2502 return insn_len;
2503 }
2504
2505 static int dec_move_mp(CPUCRISState *env, DisasContext *dc)
2506 {
2507 TCGv t[2];
2508 int memsize = memsize_zz(dc);
2509 int insn_len = 2;
2510
2511 LOG_DIS("move.%c [$r%u%s, $p%u\n",
2512 memsize_char(memsize),
2513 dc->op1,
2514 dc->postinc ? "+]" : "]",
2515 dc->op2);
2516
2517 cris_alu_m_alloc_temps(t);
2518 insn_len = dec_prep_alu_m(env, dc, 0, memsize, t[0], t[1]);
2519 cris_cc_mask(dc, 0);
2520 if (dc->op2 == PR_CCS) {
2521 cris_evaluate_flags(dc);
2522 if (dc->tb_flags & U_FLAG) {
2523 /* User space is not allowed to touch all flags. */
2524 tcg_gen_andi_tl(t[1], t[1], 0x39f);
2525 tcg_gen_andi_tl(t[0], cpu_PR[PR_CCS], ~0x39f);
2526 tcg_gen_or_tl(t[1], t[0], t[1]);
2527 }
2528 }
2529
2530 t_gen_mov_preg_TN(dc, dc->op2, t[1]);
2531
2532 do_postinc(dc, memsize);
2533 cris_alu_m_free_temps(t);
2534 return insn_len;
2535 }
2536
2537 static int dec_move_pm(CPUCRISState *env, DisasContext *dc)
2538 {
2539 TCGv t0;
2540 int memsize;
2541
2542 memsize = preg_sizes[dc->op2];
2543
2544 LOG_DIS("move.%c $p%u, [$r%u%s\n",
2545 memsize_char(memsize),
2546 dc->op2, dc->op1, dc->postinc ? "+]" : "]");
2547
2548 /* prepare store. Address in T0, value in T1. */
2549 if (dc->op2 == PR_CCS) {
2550 cris_evaluate_flags(dc);
2551 }
2552 t0 = tcg_temp_new();
2553 t_gen_mov_TN_preg(t0, dc->op2);
2554 cris_flush_cc_state(dc);
2555 gen_store(dc, cpu_R[dc->op1], t0, memsize);
2556 tcg_temp_free(t0);
2557
2558 cris_cc_mask(dc, 0);
2559 if (dc->postinc) {
2560 tcg_gen_addi_tl(cpu_R[dc->op1], cpu_R[dc->op1], memsize);
2561 }
2562 return 2;
2563 }
2564
2565 static int dec_movem_mr(CPUCRISState *env, DisasContext *dc)
2566 {
2567 TCGv_i64 tmp[16];
2568 TCGv tmp32;
2569 TCGv addr;
2570 int i;
2571 int nr = dc->op2 + 1;
2572
2573 LOG_DIS("movem [$r%u%s, $r%u\n", dc->op1,
2574 dc->postinc ? "+]" : "]", dc->op2);
2575
2576 addr = tcg_temp_new();
2577 /* There are probably better ways of doing this. */
2578 cris_flush_cc_state(dc);
2579 for (i = 0; i < (nr >> 1); i++) {
2580 tmp[i] = tcg_temp_new_i64();
2581 tcg_gen_addi_tl(addr, cpu_R[dc->op1], i * 8);
2582 gen_load64(dc, tmp[i], addr);
2583 }
2584 if (nr & 1) {
2585 tmp32 = tcg_temp_new_i32();
2586 tcg_gen_addi_tl(addr, cpu_R[dc->op1], i * 8);
2587 gen_load(dc, tmp32, addr, 4, 0);
2588 } else {
2589 TCGV_UNUSED(tmp32);
2590 }
2591 tcg_temp_free(addr);
2592
2593 for (i = 0; i < (nr >> 1); i++) {
2594 tcg_gen_extrl_i64_i32(cpu_R[i * 2], tmp[i]);
2595 tcg_gen_shri_i64(tmp[i], tmp[i], 32);
2596 tcg_gen_extrl_i64_i32(cpu_R[i * 2 + 1], tmp[i]);
2597 tcg_temp_free_i64(tmp[i]);
2598 }
2599 if (nr & 1) {
2600 tcg_gen_mov_tl(cpu_R[dc->op2], tmp32);
2601 tcg_temp_free(tmp32);
2602 }
2603
2604 /* writeback the updated pointer value. */
2605 if (dc->postinc) {
2606 tcg_gen_addi_tl(cpu_R[dc->op1], cpu_R[dc->op1], nr * 4);
2607 }
2608
2609 /* gen_load might want to evaluate the previous insns flags. */
2610 cris_cc_mask(dc, 0);
2611 return 2;
2612 }
2613
2614 static int dec_movem_rm(CPUCRISState *env, DisasContext *dc)
2615 {
2616 TCGv tmp;
2617 TCGv addr;
2618 int i;
2619
2620 LOG_DIS("movem $r%u, [$r%u%s\n", dc->op2, dc->op1,
2621 dc->postinc ? "+]" : "]");
2622
2623 cris_flush_cc_state(dc);
2624
2625 tmp = tcg_temp_new();
2626 addr = tcg_temp_new();
2627 tcg_gen_movi_tl(tmp, 4);
2628 tcg_gen_mov_tl(addr, cpu_R[dc->op1]);
2629 for (i = 0; i <= dc->op2; i++) {
2630 /* Displace addr. */
2631 /* Perform the store. */
2632 gen_store(dc, addr, cpu_R[i], 4);
2633 tcg_gen_add_tl(addr, addr, tmp);
2634 }
2635 if (dc->postinc) {
2636 tcg_gen_mov_tl(cpu_R[dc->op1], addr);
2637 }
2638 cris_cc_mask(dc, 0);
2639 tcg_temp_free(tmp);
2640 tcg_temp_free(addr);
2641 return 2;
2642 }
2643
2644 static int dec_move_rm(CPUCRISState *env, DisasContext *dc)
2645 {
2646 int memsize;
2647
2648 memsize = memsize_zz(dc);
2649
2650 LOG_DIS("move.%c $r%u, [$r%u]\n",
2651 memsize_char(memsize), dc->op2, dc->op1);
2652
2653 /* prepare store. */
2654 cris_flush_cc_state(dc);
2655 gen_store(dc, cpu_R[dc->op1], cpu_R[dc->op2], memsize);
2656
2657 if (dc->postinc) {
2658 tcg_gen_addi_tl(cpu_R[dc->op1], cpu_R[dc->op1], memsize);
2659 }
2660 cris_cc_mask(dc, 0);
2661 return 2;
2662 }
2663
2664 static int dec_lapcq(CPUCRISState *env, DisasContext *dc)
2665 {
2666 LOG_DIS("lapcq %x, $r%u\n",
2667 dc->pc + dc->op1*2, dc->op2);
2668 cris_cc_mask(dc, 0);
2669 tcg_gen_movi_tl(cpu_R[dc->op2], dc->pc + dc->op1 * 2);
2670 return 2;
2671 }
2672
2673 static int dec_lapc_im(CPUCRISState *env, DisasContext *dc)
2674 {
2675 unsigned int rd;
2676 int32_t imm;
2677 int32_t pc;
2678
2679 rd = dc->op2;
2680
2681 cris_cc_mask(dc, 0);
2682 imm = cris_fetch(env, dc, dc->pc + 2, 4, 0);
2683 LOG_DIS("lapc 0x%x, $r%u\n", imm + dc->pc, dc->op2);
2684
2685 pc = dc->pc;
2686 pc += imm;
2687 tcg_gen_movi_tl(cpu_R[rd], pc);
2688 return 6;
2689 }
2690
2691 /* Jump to special reg. */
2692 static int dec_jump_p(CPUCRISState *env, DisasContext *dc)
2693 {
2694 LOG_DIS("jump $p%u\n", dc->op2);
2695
2696 if (dc->op2 == PR_CCS) {
2697 cris_evaluate_flags(dc);
2698 }
2699 t_gen_mov_TN_preg(env_btarget, dc->op2);
2700 /* rete will often have low bit set to indicate delayslot. */
2701 tcg_gen_andi_tl(env_btarget, env_btarget, ~1);
2702 cris_cc_mask(dc, 0);
2703 cris_prepare_jmp(dc, JMP_INDIRECT);
2704 return 2;
2705 }
2706
2707 /* Jump and save. */
2708 static int dec_jas_r(CPUCRISState *env, DisasContext *dc)
2709 {
2710 LOG_DIS("jas $r%u, $p%u\n", dc->op1, dc->op2);
2711 cris_cc_mask(dc, 0);
2712 /* Store the return address in Pd. */
2713 tcg_gen_mov_tl(env_btarget, cpu_R[dc->op1]);
2714 if (dc->op2 > 15) {
2715 abort();
2716 }
2717 t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 4));
2718
2719 cris_prepare_jmp(dc, JMP_INDIRECT);
2720 return 2;
2721 }
2722
2723 static int dec_jas_im(CPUCRISState *env, DisasContext *dc)
2724 {
2725 uint32_t imm;
2726
2727 imm = cris_fetch(env, dc, dc->pc + 2, 4, 0);
2728
2729 LOG_DIS("jas 0x%x\n", imm);
2730 cris_cc_mask(dc, 0);
2731 /* Store the return address in Pd. */
2732 t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 8));
2733
2734 dc->jmp_pc = imm;
2735 cris_prepare_jmp(dc, JMP_DIRECT);
2736 return 6;
2737 }
2738
2739 static int dec_jasc_im(CPUCRISState *env, DisasContext *dc)
2740 {
2741 uint32_t imm;
2742
2743 imm = cris_fetch(env, dc, dc->pc + 2, 4, 0);
2744
2745 LOG_DIS("jasc 0x%x\n", imm);
2746 cris_cc_mask(dc, 0);
2747 /* Store the return address in Pd. */
2748 t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 8 + 4));
2749
2750 dc->jmp_pc = imm;
2751 cris_prepare_jmp(dc, JMP_DIRECT);
2752 return 6;
2753 }
2754
2755 static int dec_jasc_r(CPUCRISState *env, DisasContext *dc)
2756 {
2757 LOG_DIS("jasc_r $r%u, $p%u\n", dc->op1, dc->op2);
2758 cris_cc_mask(dc, 0);
2759 /* Store the return address in Pd. */
2760 tcg_gen_mov_tl(env_btarget, cpu_R[dc->op1]);
2761 t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 4 + 4));
2762 cris_prepare_jmp(dc, JMP_INDIRECT);
2763 return 2;
2764 }
2765
2766 static int dec_bcc_im(CPUCRISState *env, DisasContext *dc)
2767 {
2768 int32_t offset;
2769 uint32_t cond = dc->op2;
2770
2771 offset = cris_fetch(env, dc, dc->pc + 2, 2, 1);
2772
2773 LOG_DIS("b%s %d pc=%x dst=%x\n",
2774 cc_name(cond), offset,
2775 dc->pc, dc->pc + offset);
2776
2777 cris_cc_mask(dc, 0);
2778 /* op2 holds the condition-code. */
2779 cris_prepare_cc_branch(dc, offset, cond);
2780 return 4;
2781 }
2782
2783 static int dec_bas_im(CPUCRISState *env, DisasContext *dc)
2784 {
2785 int32_t simm;
2786
2787 simm = cris_fetch(env, dc, dc->pc + 2, 4, 0);
2788
2789 LOG_DIS("bas 0x%x, $p%u\n", dc->pc + simm, dc->op2);
2790 cris_cc_mask(dc, 0);
2791 /* Store the return address in Pd. */
2792 t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 8));
2793
2794 dc->jmp_pc = dc->pc + simm;
2795 cris_prepare_jmp(dc, JMP_DIRECT);
2796 return 6;
2797 }
2798
2799 static int dec_basc_im(CPUCRISState *env, DisasContext *dc)
2800 {
2801 int32_t simm;
2802 simm = cris_fetch(env, dc, dc->pc + 2, 4, 0);
2803
2804 LOG_DIS("basc 0x%x, $p%u\n", dc->pc + simm, dc->op2);
2805 cris_cc_mask(dc, 0);
2806 /* Store the return address in Pd. */
2807 t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 12));
2808
2809 dc->jmp_pc = dc->pc + simm;
2810 cris_prepare_jmp(dc, JMP_DIRECT);
2811 return 6;
2812 }
2813
2814 static int dec_rfe_etc(CPUCRISState *env, DisasContext *dc)
2815 {
2816 cris_cc_mask(dc, 0);
2817
2818 if (dc->op2 == 15) {
2819 tcg_gen_st_i32(tcg_const_i32(1), cpu_env,
2820 -offsetof(CRISCPU, env) + offsetof(CPUState, halted));
2821 tcg_gen_movi_tl(env_pc, dc->pc + 2);
2822 t_gen_raise_exception(EXCP_HLT);
2823 return 2;
2824 }
2825
2826 switch (dc->op2 & 7) {
2827 case 2:
2828 /* rfe. */
2829 LOG_DIS("rfe\n");
2830 cris_evaluate_flags(dc);
2831 gen_helper_rfe(cpu_env);
2832 dc->is_jmp = DISAS_UPDATE;
2833 break;
2834 case 5:
2835 /* rfn. */
2836 LOG_DIS("rfn\n");
2837 cris_evaluate_flags(dc);
2838 gen_helper_rfn(cpu_env);
2839 dc->is_jmp = DISAS_UPDATE;
2840 break;
2841 case 6:
2842 LOG_DIS("break %d\n", dc->op1);
2843 cris_evaluate_flags(dc);
2844 /* break. */
2845 tcg_gen_movi_tl(env_pc, dc->pc + 2);
2846
2847 /* Breaks start at 16 in the exception vector. */
2848 t_gen_mov_env_TN(trap_vector,
2849 tcg_const_tl(dc->op1 + 16));
2850 t_gen_raise_exception(EXCP_BREAK);
2851 dc->is_jmp = DISAS_UPDATE;
2852 break;
2853 default:
2854 printf("op2=%x\n", dc->op2);
2855 BUG();
2856 break;
2857
2858 }
2859 return 2;
2860 }
2861
2862 static int dec_ftag_fidx_d_m(CPUCRISState *env, DisasContext *dc)
2863 {
2864 return 2;
2865 }
2866
2867 static int dec_ftag_fidx_i_m(CPUCRISState *env, DisasContext *dc)
2868 {
2869 return 2;
2870 }
2871
2872 static int dec_null(CPUCRISState *env, DisasContext *dc)
2873 {
2874 printf("unknown insn pc=%x opc=%x op1=%x op2=%x\n",
2875 dc->pc, dc->opcode, dc->op1, dc->op2);
2876 fflush(NULL);
2877 BUG();
2878 return 2;
2879 }
2880
2881 static struct decoder_info {
2882 struct {
2883 uint32_t bits;
2884 uint32_t mask;
2885 };
2886 int (*dec)(CPUCRISState *env, DisasContext *dc);
2887 } decinfo[] = {
2888 /* Order matters here. */
2889 {DEC_MOVEQ, dec_moveq},
2890 {DEC_BTSTQ, dec_btstq},
2891 {DEC_CMPQ, dec_cmpq},
2892 {DEC_ADDOQ, dec_addoq},
2893 {DEC_ADDQ, dec_addq},
2894 {DEC_SUBQ, dec_subq},
2895 {DEC_ANDQ, dec_andq},
2896 {DEC_ORQ, dec_orq},
2897 {DEC_ASRQ, dec_asrq},
2898 {DEC_LSLQ, dec_lslq},
2899 {DEC_LSRQ, dec_lsrq},
2900 {DEC_BCCQ, dec_bccq},
2901
2902 {DEC_BCC_IM, dec_bcc_im},
2903 {DEC_JAS_IM, dec_jas_im},
2904 {DEC_JAS_R, dec_jas_r},
2905 {DEC_JASC_IM, dec_jasc_im},
2906 {DEC_JASC_R, dec_jasc_r},
2907 {DEC_BAS_IM, dec_bas_im},
2908 {DEC_BASC_IM, dec_basc_im},
2909 {DEC_JUMP_P, dec_jump_p},
2910 {DEC_LAPC_IM, dec_lapc_im},
2911 {DEC_LAPCQ, dec_lapcq},
2912
2913 {DEC_RFE_ETC, dec_rfe_etc},
2914 {DEC_ADDC_MR, dec_addc_mr},
2915
2916 {DEC_MOVE_MP, dec_move_mp},
2917 {DEC_MOVE_PM, dec_move_pm},
2918 {DEC_MOVEM_MR, dec_movem_mr},
2919 {DEC_MOVEM_RM, dec_movem_rm},
2920 {DEC_MOVE_PR, dec_move_pr},
2921 {DEC_SCC_R, dec_scc_r},
2922 {DEC_SETF, dec_setclrf},
2923 {DEC_CLEARF, dec_setclrf},
2924
2925 {DEC_MOVE_SR, dec_move_sr},
2926 {DEC_MOVE_RP, dec_move_rp},
2927 {DEC_SWAP_R, dec_swap_r},
2928 {DEC_ABS_R, dec_abs_r},
2929 {DEC_LZ_R, dec_lz_r},
2930 {DEC_MOVE_RS, dec_move_rs},
2931 {DEC_BTST_R, dec_btst_r},
2932 {DEC_ADDC_R, dec_addc_r},
2933
2934 {DEC_DSTEP_R, dec_dstep_r},
2935 {DEC_XOR_R, dec_xor_r},
2936 {DEC_MCP_R, dec_mcp_r},
2937 {DEC_CMP_R, dec_cmp_r},
2938
2939 {DEC_ADDI_R, dec_addi_r},
2940 {DEC_ADDI_ACR, dec_addi_acr},
2941
2942 {DEC_ADD_R, dec_add_r},
2943 {DEC_SUB_R, dec_sub_r},
2944
2945 {DEC_ADDU_R, dec_addu_r},
2946 {DEC_ADDS_R, dec_adds_r},
2947 {DEC_SUBU_R, dec_subu_r},
2948 {DEC_SUBS_R, dec_subs_r},
2949 {DEC_LSL_R, dec_lsl_r},
2950
2951 {DEC_AND_R, dec_and_r},
2952 {DEC_OR_R, dec_or_r},
2953 {DEC_BOUND_R, dec_bound_r},
2954 {DEC_ASR_R, dec_asr_r},
2955 {DEC_LSR_R, dec_lsr_r},
2956
2957 {DEC_MOVU_R, dec_movu_r},
2958 {DEC_MOVS_R, dec_movs_r},
2959 {DEC_NEG_R, dec_neg_r},
2960 {DEC_MOVE_R, dec_move_r},
2961
2962 {DEC_FTAG_FIDX_I_M, dec_ftag_fidx_i_m},
2963 {DEC_FTAG_FIDX_D_M, dec_ftag_fidx_d_m},
2964
2965 {DEC_MULS_R, dec_muls_r},
2966 {DEC_MULU_R, dec_mulu_r},
2967
2968 {DEC_ADDU_M, dec_addu_m},
2969 {DEC_ADDS_M, dec_adds_m},
2970 {DEC_SUBU_M, dec_subu_m},
2971 {DEC_SUBS_M, dec_subs_m},
2972
2973 {DEC_CMPU_M, dec_cmpu_m},
2974 {DEC_CMPS_M, dec_cmps_m},
2975 {DEC_MOVU_M, dec_movu_m},
2976 {DEC_MOVS_M, dec_movs_m},
2977
2978 {DEC_CMP_M, dec_cmp_m},
2979 {DEC_ADDO_M, dec_addo_m},
2980 {DEC_BOUND_M, dec_bound_m},
2981 {DEC_ADD_M, dec_add_m},
2982 {DEC_SUB_M, dec_sub_m},
2983 {DEC_AND_M, dec_and_m},
2984 {DEC_OR_M, dec_or_m},
2985 {DEC_MOVE_RM, dec_move_rm},
2986 {DEC_TEST_M, dec_test_m},
2987 {DEC_MOVE_MR, dec_move_mr},
2988
2989 {{0, 0}, dec_null}
2990 };
2991
2992 static unsigned int crisv32_decoder(CPUCRISState *env, DisasContext *dc)
2993 {
2994 int insn_len = 2;
2995 int i;
2996
2997 if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
2998 tcg_gen_debug_insn_start(dc->pc);
2999 }
3000
3001 /* Load a halfword onto the instruction register. */
3002 dc->ir = cris_fetch(env, dc, dc->pc, 2, 0);
3003
3004 /* Now decode it. */
3005 dc->opcode = EXTRACT_FIELD(dc->ir, 4, 11);
3006 dc->op1 = EXTRACT_FIELD(dc->ir, 0, 3);
3007 dc->op2 = EXTRACT_FIELD(dc->ir, 12, 15);
3008 dc->zsize = EXTRACT_FIELD(dc->ir, 4, 4);
3009 dc->zzsize = EXTRACT_FIELD(dc->ir, 4, 5);
3010 dc->postinc = EXTRACT_FIELD(dc->ir, 10, 10);
3011
3012 /* Large switch for all insns. */
3013 for (i = 0; i < ARRAY_SIZE(decinfo); i++) {
3014 if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits) {
3015 insn_len = decinfo[i].dec(env, dc);
3016 break;
3017 }
3018 }
3019
3020 #if !defined(CONFIG_USER_ONLY)
3021 /* Single-stepping ? */
3022 if (dc->tb_flags & S_FLAG) {
3023 TCGLabel *l1 = gen_new_label();
3024 tcg_gen_brcondi_tl(TCG_COND_NE, cpu_PR[PR_SPC], dc->pc, l1);
3025 /* We treat SPC as a break with an odd trap vector. */
3026 cris_evaluate_flags(dc);
3027 t_gen_mov_env_TN(trap_vector, tcg_const_tl(3));
3028 tcg_gen_movi_tl(env_pc, dc->pc + insn_len);
3029 tcg_gen_movi_tl(cpu_PR[PR_SPC], dc->pc + insn_len);
3030 t_gen_raise_exception(EXCP_BREAK);
3031 gen_set_label(l1);
3032 }
3033 #endif
3034 return insn_len;
3035 }
3036
3037 static void check_breakpoint(CPUCRISState *env, DisasContext *dc)
3038 {
3039 CPUState *cs = CPU(cris_env_get_cpu(env));
3040 CPUBreakpoint *bp;
3041
3042 if (unlikely(!QTAILQ_EMPTY(&cs->breakpoints))) {
3043 QTAILQ_FOREACH(bp, &cs->breakpoints, entry) {
3044 if (bp->pc == dc->pc) {
3045 cris_evaluate_flags(dc);
3046 tcg_gen_movi_tl(env_pc, dc->pc);
3047 t_gen_raise_exception(EXCP_DEBUG);
3048 dc->is_jmp = DISAS_UPDATE;
3049 }
3050 }
3051 }
3052 }
3053
3054 #include "translate_v10.c"
3055
3056 /*
3057 * Delay slots on QEMU/CRIS.
3058 *
3059 * If an exception hits on a delayslot, the core will let ERP (the Exception
3060 * Return Pointer) point to the branch (the previous) insn and set the lsb to
3061 * to give SW a hint that the exception actually hit on the dslot.
3062 *
3063 * CRIS expects all PC addresses to be 16-bit aligned. The lsb is ignored by
3064 * the core and any jmp to an odd addresses will mask off that lsb. It is
3065 * simply there to let sw know there was an exception on a dslot.
3066 *
3067 * When the software returns from an exception, the branch will re-execute.
3068 * On QEMU care needs to be taken when a branch+delayslot sequence is broken
3069 * and the branch and delayslot dont share pages.
3070 *
3071 * The TB contaning the branch insn will set up env->btarget and evaluate
3072 * env->btaken. When the translation loop exits we will note that the branch
3073 * sequence is broken and let env->dslot be the size of the branch insn (those
3074 * vary in length).
3075 *
3076 * The TB contaning the delayslot will have the PC of its real insn (i.e no lsb
3077 * set). It will also expect to have env->dslot setup with the size of the
3078 * delay slot so that env->pc - env->dslot point to the branch insn. This TB
3079 * will execute the dslot and take the branch, either to btarget or just one
3080 * insn ahead.
3081 *
3082 * When exceptions occur, we check for env->dslot in do_interrupt to detect
3083 * broken branch sequences and setup $erp accordingly (i.e let it point to the
3084 * branch and set lsb). Then env->dslot gets cleared so that the exception
3085 * handler can enter. When returning from exceptions (jump $erp) the lsb gets
3086 * masked off and we will reexecute the branch insn.
3087 *
3088 */
3089
3090 /* generate intermediate code for basic block 'tb'. */
3091 static inline void
3092 gen_intermediate_code_internal(CRISCPU *cpu, TranslationBlock *tb,
3093 bool search_pc)
3094 {
3095 CPUState *cs = CPU(cpu);
3096 CPUCRISState *env = &cpu->env;
3097 uint32_t pc_start;
3098 unsigned int insn_len;
3099 int j, lj;
3100 struct DisasContext ctx;
3101 struct DisasContext *dc = &ctx;
3102 uint32_t next_page_start;
3103 target_ulong npc;
3104 int num_insns;
3105 int max_insns;
3106
3107 if (env->pregs[PR_VR] == 32) {
3108 dc->decoder = crisv32_decoder;
3109 dc->clear_locked_irq = 0;
3110 } else {
3111 dc->decoder = crisv10_decoder;
3112 dc->clear_locked_irq = 1;
3113 }
3114
3115 /* Odd PC indicates that branch is rexecuting due to exception in the
3116 * delayslot, like in real hw.
3117 */
3118 pc_start = tb->pc & ~1;
3119 dc->cpu = cpu;
3120 dc->tb = tb;
3121
3122 dc->is_jmp = DISAS_NEXT;
3123 dc->ppc = pc_start;
3124 dc->pc = pc_start;
3125 dc->singlestep_enabled = cs->singlestep_enabled;
3126 dc->flags_uptodate = 1;
3127 dc->flagx_known = 1;
3128 dc->flags_x = tb->flags & X_FLAG;
3129 dc->cc_x_uptodate = 0;
3130 dc->cc_mask = 0;
3131 dc->update_cc = 0;
3132 dc->clear_prefix = 0;
3133
3134 cris_update_cc_op(dc, CC_OP_FLAGS, 4);
3135 dc->cc_size_uptodate = -1;
3136
3137 /* Decode TB flags. */
3138 dc->tb_flags = tb->flags & (S_FLAG | P_FLAG | U_FLAG \
3139 | X_FLAG | PFIX_FLAG);
3140 dc->delayed_branch = !!(tb->flags & 7);
3141 if (dc->delayed_branch) {
3142 dc->jmp = JMP_INDIRECT;
3143 } else {
3144 dc->jmp = JMP_NOJMP;
3145 }
3146
3147 dc->cpustate_changed = 0;
3148
3149 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
3150 qemu_log(
3151 "srch=%d pc=%x %x flg=%" PRIx64 " bt=%x ds=%u ccs=%x\n"
3152 "pid=%x usp=%x\n"
3153 "%x.%x.%x.%x\n"
3154 "%x.%x.%x.%x\n"
3155 "%x.%x.%x.%x\n"
3156 "%x.%x.%x.%x\n",
3157 search_pc, dc->pc, dc->ppc,
3158 (uint64_t)tb->flags,
3159 env->btarget, (unsigned)tb->flags & 7,
3160 env->pregs[PR_CCS],
3161 env->pregs[PR_PID], env->pregs[PR_USP],
3162 env->regs[0], env->regs[1], env->regs[2], env->regs[3],
3163 env->regs[4], env->regs[5], env->regs[6], env->regs[7],
3164 env->regs[8], env->regs[9],
3165 env->regs[10], env->regs[11],
3166 env->regs[12], env->regs[13],
3167 env->regs[14], env->regs[15]);
3168 qemu_log("--------------\n");
3169 qemu_log("IN: %s\n", lookup_symbol(pc_start));
3170 }
3171
3172 next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
3173 lj = -1;
3174 num_insns = 0;
3175 max_insns = tb->cflags & CF_COUNT_MASK;
3176 if (max_insns == 0) {
3177 max_insns = CF_COUNT_MASK;
3178 }
3179
3180 gen_tb_start(tb);
3181 do {
3182 check_breakpoint(env, dc);
3183
3184 if (search_pc) {
3185 j = tcg_op_buf_count();
3186 if (lj < j) {
3187 lj++;
3188 while (lj < j) {
3189 tcg_ctx.gen_opc_instr_start[lj++] = 0;
3190 }
3191 }
3192 if (dc->delayed_branch == 1) {
3193 tcg_ctx.gen_opc_pc[lj] = dc->ppc | 1;
3194 } else {
3195 tcg_ctx.gen_opc_pc[lj] = dc->pc;
3196 }
3197 tcg_ctx.gen_opc_instr_start[lj] = 1;
3198 tcg_ctx.gen_opc_icount[lj] = num_insns;
3199 }
3200
3201 /* Pretty disas. */
3202 LOG_DIS("%8.8x:\t", dc->pc);
3203
3204 if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) {
3205 gen_io_start();
3206 }
3207 dc->clear_x = 1;
3208
3209 insn_len = dc->decoder(env, dc);
3210 dc->ppc = dc->pc;
3211 dc->pc += insn_len;
3212 if (dc->clear_x) {
3213 cris_clear_x_flag(dc);
3214 }
3215
3216 num_insns++;
3217 /* Check for delayed branches here. If we do it before
3218 actually generating any host code, the simulator will just
3219 loop doing nothing for on this program location. */
3220 if (dc->delayed_branch) {
3221 dc->delayed_branch--;
3222 if (dc->delayed_branch == 0) {
3223 if (tb->flags & 7) {
3224 t_gen_mov_env_TN(dslot, tcg_const_tl(0));
3225 }
3226 if (dc->cpustate_changed || !dc->flagx_known
3227 || (dc->flags_x != (tb->flags & X_FLAG))) {
3228 cris_store_direct_jmp(dc);
3229 }
3230
3231 if (dc->clear_locked_irq) {
3232 dc->clear_locked_irq = 0;
3233 t_gen_mov_env_TN(locked_irq, tcg_const_tl(0));
3234 }
3235
3236 if (dc->jmp == JMP_DIRECT_CC) {
3237 TCGLabel *l1 = gen_new_label();
3238 cris_evaluate_flags(dc);
3239
3240 /* Conditional jmp. */
3241 tcg_gen_brcondi_tl(TCG_COND_EQ,
3242 env_btaken, 0, l1);
3243 gen_goto_tb(dc, 1, dc->jmp_pc);
3244 gen_set_label(l1);
3245 gen_goto_tb(dc, 0, dc->pc);
3246 dc->is_jmp = DISAS_TB_JUMP;
3247 dc->jmp = JMP_NOJMP;
3248 } else if (dc->jmp == JMP_DIRECT) {
3249 cris_evaluate_flags(dc);
3250 gen_goto_tb(dc, 0, dc->jmp_pc);
3251 dc->is_jmp = DISAS_TB_JUMP;
3252 dc->jmp = JMP_NOJMP;
3253 } else {
3254 t_gen_cc_jmp(env_btarget, tcg_const_tl(dc->pc));
3255 dc->is_jmp = DISAS_JUMP;
3256 }
3257 break;
3258 }
3259 }
3260
3261 /* If we are rexecuting a branch due to exceptions on
3262 delay slots dont break. */
3263 if (!(tb->pc & 1) && cs->singlestep_enabled) {
3264 break;
3265 }
3266 } while (!dc->is_jmp && !dc->cpustate_changed
3267 && !tcg_op_buf_full()
3268 && !singlestep
3269 && (dc->pc < next_page_start)
3270 && num_insns < max_insns);
3271
3272 if (dc->clear_locked_irq) {
3273 t_gen_mov_env_TN(locked_irq, tcg_const_tl(0));
3274 }
3275
3276 npc = dc->pc;
3277
3278 if (tb->cflags & CF_LAST_IO)
3279 gen_io_end();
3280 /* Force an update if the per-tb cpu state has changed. */
3281 if (dc->is_jmp == DISAS_NEXT
3282 && (dc->cpustate_changed || !dc->flagx_known
3283 || (dc->flags_x != (tb->flags & X_FLAG)))) {
3284 dc->is_jmp = DISAS_UPDATE;
3285 tcg_gen_movi_tl(env_pc, npc);
3286 }
3287 /* Broken branch+delayslot sequence. */
3288 if (dc->delayed_branch == 1) {
3289 /* Set env->dslot to the size of the branch insn. */
3290 t_gen_mov_env_TN(dslot, tcg_const_tl(dc->pc - dc->ppc));
3291 cris_store_direct_jmp(dc);
3292 }
3293
3294 cris_evaluate_flags(dc);
3295
3296 if (unlikely(cs->singlestep_enabled)) {
3297 if (dc->is_jmp == DISAS_NEXT) {
3298 tcg_gen_movi_tl(env_pc, npc);
3299 }
3300 t_gen_raise_exception(EXCP_DEBUG);
3301 } else {
3302 switch (dc->is_jmp) {
3303 case DISAS_NEXT:
3304 gen_goto_tb(dc, 1, npc);
3305 break;
3306 default:
3307 case DISAS_JUMP:
3308 case DISAS_UPDATE:
3309 /* indicate that the hash table must be used
3310 to find the next TB */
3311 tcg_gen_exit_tb(0);
3312 break;
3313 case DISAS_SWI:
3314 case DISAS_TB_JUMP:
3315 /* nothing more to generate */
3316 break;
3317 }
3318 }
3319 gen_tb_end(tb, num_insns);
3320
3321 if (search_pc) {
3322 j = tcg_op_buf_count();
3323 lj++;
3324 while (lj <= j) {
3325 tcg_ctx.gen_opc_instr_start[lj++] = 0;
3326 }
3327 } else {
3328 tb->size = dc->pc - pc_start;
3329 tb->icount = num_insns;
3330 }
3331
3332 #ifdef DEBUG_DISAS
3333 #if !DISAS_CRIS
3334 if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
3335 log_target_disas(cs, pc_start, dc->pc - pc_start,
3336 env->pregs[PR_VR]);
3337 qemu_log("\nisize=%d osize=%d\n",
3338 dc->pc - pc_start, tcg_op_buf_count());
3339 }
3340 #endif
3341 #endif
3342 }
3343
3344 void gen_intermediate_code (CPUCRISState *env, struct TranslationBlock *tb)
3345 {
3346 gen_intermediate_code_internal(cris_env_get_cpu(env), tb, false);
3347 }
3348
3349 void gen_intermediate_code_pc (CPUCRISState *env, struct TranslationBlock *tb)
3350 {
3351 gen_intermediate_code_internal(cris_env_get_cpu(env), tb, true);
3352 }
3353
3354 void cris_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
3355 int flags)
3356 {
3357 CRISCPU *cpu = CRIS_CPU(cs);
3358 CPUCRISState *env = &cpu->env;
3359 int i;
3360 uint32_t srs;
3361
3362 if (!env || !f) {
3363 return;
3364 }
3365
3366 cpu_fprintf(f, "PC=%x CCS=%x btaken=%d btarget=%x\n"
3367 "cc_op=%d cc_src=%d cc_dest=%d cc_result=%x cc_mask=%x\n",
3368 env->pc, env->pregs[PR_CCS], env->btaken, env->btarget,
3369 env->cc_op,
3370 env->cc_src, env->cc_dest, env->cc_result, env->cc_mask);
3371
3372
3373 for (i = 0; i < 16; i++) {
3374 cpu_fprintf(f, "%s=%8.8x ", regnames[i], env->regs[i]);
3375 if ((i + 1) % 4 == 0) {
3376 cpu_fprintf(f, "\n");
3377 }
3378 }
3379 cpu_fprintf(f, "\nspecial regs:\n");
3380 for (i = 0; i < 16; i++) {
3381 cpu_fprintf(f, "%s=%8.8x ", pregnames[i], env->pregs[i]);
3382 if ((i + 1) % 4 == 0) {
3383 cpu_fprintf(f, "\n");
3384 }
3385 }
3386 srs = env->pregs[PR_SRS];
3387 cpu_fprintf(f, "\nsupport function regs bank %x:\n", srs);
3388 if (srs < ARRAY_SIZE(env->sregs)) {
3389 for (i = 0; i < 16; i++) {
3390 cpu_fprintf(f, "s%2.2d=%8.8x ",
3391 i, env->sregs[srs][i]);
3392 if ((i + 1) % 4 == 0) {
3393 cpu_fprintf(f, "\n");
3394 }
3395 }
3396 }
3397 cpu_fprintf(f, "\n\n");
3398
3399 }
3400
3401 void cris_initialize_tcg(void)
3402 {
3403 int i;
3404
3405 cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
3406 cc_x = tcg_global_mem_new(TCG_AREG0,
3407 offsetof(CPUCRISState, cc_x), "cc_x");
3408 cc_src = tcg_global_mem_new(TCG_AREG0,
3409 offsetof(CPUCRISState, cc_src), "cc_src");
3410 cc_dest = tcg_global_mem_new(TCG_AREG0,
3411 offsetof(CPUCRISState, cc_dest),
3412 "cc_dest");
3413 cc_result = tcg_global_mem_new(TCG_AREG0,
3414 offsetof(CPUCRISState, cc_result),
3415 "cc_result");
3416 cc_op = tcg_global_mem_new(TCG_AREG0,
3417 offsetof(CPUCRISState, cc_op), "cc_op");
3418 cc_size = tcg_global_mem_new(TCG_AREG0,
3419 offsetof(CPUCRISState, cc_size),
3420 "cc_size");
3421 cc_mask = tcg_global_mem_new(TCG_AREG0,
3422 offsetof(CPUCRISState, cc_mask),
3423 "cc_mask");
3424
3425 env_pc = tcg_global_mem_new(TCG_AREG0,
3426 offsetof(CPUCRISState, pc),
3427 "pc");
3428 env_btarget = tcg_global_mem_new(TCG_AREG0,
3429 offsetof(CPUCRISState, btarget),
3430 "btarget");
3431 env_btaken = tcg_global_mem_new(TCG_AREG0,
3432 offsetof(CPUCRISState, btaken),
3433 "btaken");
3434 for (i = 0; i < 16; i++) {
3435 cpu_R[i] = tcg_global_mem_new(TCG_AREG0,
3436 offsetof(CPUCRISState, regs[i]),
3437 regnames[i]);
3438 }
3439 for (i = 0; i < 16; i++) {
3440 cpu_PR[i] = tcg_global_mem_new(TCG_AREG0,
3441 offsetof(CPUCRISState, pregs[i]),
3442 pregnames[i]);
3443 }
3444 }
3445
3446 void restore_state_to_opc(CPUCRISState *env, TranslationBlock *tb, int pc_pos)
3447 {
3448 env->pc = tcg_ctx.gen_opc_pc[pc_pos];
3449 }
AR7 emulation for QEMU