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cdrom: add a timing hack
[pcsx_rearmed.git] / deps / lightrec / emitter.c
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1// SPDX-License-Identifier: LGPL-2.1-or-later
2/*
3 * Copyright (C) 2014-2021 Paul Cercueil <paul@crapouillou.net>
4 */
5
6#include "blockcache.h"
7#include "debug.h"
8#include "disassembler.h"
9#include "emitter.h"
10#include "lightning-wrapper.h"
11#include "optimizer.h"
12#include "regcache.h"
13
14#include <stdbool.h>
15#include <stddef.h>
16
17typedef void (*lightrec_rec_func_t)(struct lightrec_cstate *, const struct block *, u16);
18
19/* Forward declarations */
20static void rec_SPECIAL(struct lightrec_cstate *state, const struct block *block, u16 offset);
21static void rec_REGIMM(struct lightrec_cstate *state, const struct block *block, u16 offset);
22static void rec_CP0(struct lightrec_cstate *state, const struct block *block, u16 offset);
23static void rec_CP2(struct lightrec_cstate *state, const struct block *block, u16 offset);
24
25static void unknown_opcode(struct lightrec_cstate *state, const struct block *block, u16 offset)
26{
27 pr_warn("Unknown opcode: 0x%08x at PC 0x%08x\n",
28 block->opcode_list[offset].c.opcode,
29 block->pc + (offset << 2));
30}
31
32static void
33lightrec_jump_to_eob(struct lightrec_cstate *state, jit_state_t *_jit)
34{
35 /* Prevent jit_jmpi() from using our cycles register as a temporary */
36 jit_live(LIGHTREC_REG_CYCLE);
37
38 jit_patch_abs(jit_jmpi(), state->state->eob_wrapper_func);
39}
40
41static void lightrec_emit_end_of_block(struct lightrec_cstate *state,
42 const struct block *block, u16 offset,
43 s8 reg_new_pc, u32 imm, u8 ra_reg,
44 u32 link, bool update_cycles)
45{
46 struct regcache *reg_cache = state->reg_cache;
47 jit_state_t *_jit = block->_jit;
48 const struct opcode *op = &block->opcode_list[offset],
49 *next = &block->opcode_list[offset + 1];
50 u32 cycles = state->cycles + lightrec_cycles_of_opcode(op->c);
51
52 jit_note(__FILE__, __LINE__);
53
54 if (link) {
55 /* Update the $ra register */
56 u8 link_reg = lightrec_alloc_reg_out(reg_cache, _jit, ra_reg, 0);
57 jit_movi(link_reg, link);
58 lightrec_free_reg(reg_cache, link_reg);
59 }
60
61 if (reg_new_pc < 0) {
62 reg_new_pc = lightrec_alloc_reg(reg_cache, _jit, JIT_V0);
63 lightrec_lock_reg(reg_cache, _jit, reg_new_pc);
64
65 jit_movi(reg_new_pc, imm);
66 }
67
68 if (has_delay_slot(op->c) &&
69 !op_flag_no_ds(op->flags) && !op_flag_local_branch(op->flags)) {
70 cycles += lightrec_cycles_of_opcode(next->c);
71
72 /* Recompile the delay slot */
73 if (next->c.opcode)
74 lightrec_rec_opcode(state, block, offset + 1);
75 }
76
77 /* Clean the remaining registers */
78 lightrec_clean_regs(reg_cache, _jit);
79
80 jit_movr(JIT_V0, reg_new_pc);
81
82 if (cycles && update_cycles) {
83 jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, cycles);
84 pr_debug("EOB: %u cycles\n", cycles);
85 }
86
87 lightrec_jump_to_eob(state, _jit);
88}
89
90void lightrec_emit_eob(struct lightrec_cstate *state,
91 const struct block *block, u16 offset)
92{
93 struct regcache *reg_cache = state->reg_cache;
94 jit_state_t *_jit = block->_jit;
95
96 lightrec_clean_regs(reg_cache, _jit);
97
98 jit_movi(JIT_V0, block->pc + (offset << 2));
99 jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, state->cycles);
100
101 lightrec_jump_to_eob(state, _jit);
102}
103
104static u8 get_jr_jalr_reg(struct lightrec_cstate *state, const struct block *block, u16 offset)
105{
106 struct regcache *reg_cache = state->reg_cache;
107 jit_state_t *_jit = block->_jit;
108 const struct opcode *op = &block->opcode_list[offset];
109 u8 rs;
110
111 rs = lightrec_request_reg_in(reg_cache, _jit, op->r.rs, JIT_V0);
112 lightrec_lock_reg(reg_cache, _jit, rs);
113
114 return rs;
115}
116
117static void rec_special_JR(struct lightrec_cstate *state, const struct block *block, u16 offset)
118{
119 u8 rs = get_jr_jalr_reg(state, block, offset);
120
121 _jit_name(block->_jit, __func__);
122 lightrec_emit_end_of_block(state, block, offset, rs, 0, 31, 0, true);
123}
124
125static void rec_special_JALR(struct lightrec_cstate *state, const struct block *block, u16 offset)
126{
127 u8 rs = get_jr_jalr_reg(state, block, offset);
128 union code c = block->opcode_list[offset].c;
129
130 _jit_name(block->_jit, __func__);
131 lightrec_emit_end_of_block(state, block, offset, rs, 0, c.r.rd,
132 get_branch_pc(block, offset, 2), true);
133}
134
135static void rec_J(struct lightrec_cstate *state, const struct block *block, u16 offset)
136{
137 union code c = block->opcode_list[offset].c;
138
139 _jit_name(block->_jit, __func__);
140 lightrec_emit_end_of_block(state, block, offset, -1,
141 (block->pc & 0xf0000000) | (c.j.imm << 2),
142 31, 0, true);
143}
144
145static void rec_JAL(struct lightrec_cstate *state, const struct block *block, u16 offset)
146{
147 union code c = block->opcode_list[offset].c;
148
149 _jit_name(block->_jit, __func__);
150 lightrec_emit_end_of_block(state, block, offset, -1,
151 (block->pc & 0xf0000000) | (c.j.imm << 2),
152 31, get_branch_pc(block, offset, 2), true);
153}
154
155static void lightrec_do_early_unload(struct lightrec_cstate *state,
156 const struct block *block, u16 offset)
157{
158 struct regcache *reg_cache = state->reg_cache;
159 const struct opcode *op = &block->opcode_list[offset];
160 jit_state_t *_jit = block->_jit;
161 unsigned int i;
162 u8 reg;
163 struct {
164 u8 reg, op;
165 } reg_ops[3] = {
166 { op->r.rd, LIGHTREC_FLAGS_GET_RD(op->flags), },
167 { op->i.rt, LIGHTREC_FLAGS_GET_RT(op->flags), },
168 { op->i.rs, LIGHTREC_FLAGS_GET_RS(op->flags), },
169 };
170
171 for (i = 0; i < ARRAY_SIZE(reg_ops); i++) {
172 reg = reg_ops[i].reg;
173
174 switch (reg_ops[i].op) {
175 case LIGHTREC_REG_UNLOAD:
176 lightrec_clean_reg_if_loaded(reg_cache, _jit, reg, true);
177 break;
178
179 case LIGHTREC_REG_DISCARD:
180 lightrec_discard_reg_if_loaded(reg_cache, reg);
181 break;
182
183 case LIGHTREC_REG_CLEAN:
184 lightrec_clean_reg_if_loaded(reg_cache, _jit, reg, false);
185 break;
186 default:
187 break;
188 };
189 }
190}
191
192static void rec_b(struct lightrec_cstate *state, const struct block *block, u16 offset,
193 jit_code_t code, jit_code_t code2, u32 link, bool unconditional, bool bz)
194{
195 struct regcache *reg_cache = state->reg_cache;
196 struct native_register *regs_backup;
197 jit_state_t *_jit = block->_jit;
198 struct lightrec_branch *branch;
199 const struct opcode *op = &block->opcode_list[offset],
200 *next = &block->opcode_list[offset + 1];
201 jit_node_t *addr;
202 u8 link_reg, rs, rt;
203 bool is_forward = (s16)op->i.imm >= -1;
204 int op_cycles = lightrec_cycles_of_opcode(op->c);
205 u32 target_offset, cycles = state->cycles + op_cycles;
206 bool no_indirection = false;
207 u32 next_pc;
208
209 jit_note(__FILE__, __LINE__);
210
211 if (!op_flag_no_ds(op->flags))
212 cycles += lightrec_cycles_of_opcode(next->c);
213
214 state->cycles = -op_cycles;
215
216 if (!unconditional) {
217 rs = lightrec_alloc_reg_in(reg_cache, _jit, op->i.rs, REG_EXT);
218 rt = bz ? 0 : lightrec_alloc_reg_in(reg_cache,
219 _jit, op->i.rt, REG_EXT);
220
221 /* Unload dead registers before evaluating the branch */
222 if (OPT_EARLY_UNLOAD)
223 lightrec_do_early_unload(state, block, offset);
224
225 if (op_flag_local_branch(op->flags) &&
226 (op_flag_no_ds(op->flags) || !next->opcode) &&
227 is_forward && !lightrec_has_dirty_regs(reg_cache))
228 no_indirection = true;
229
230 if (no_indirection)
231 pr_debug("Using no indirection for branch at offset 0x%hx\n", offset << 2);
232 }
233
234 if (cycles)
235 jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, cycles);
236
237 if (!unconditional) {
238 /* Generate the branch opcode */
239 if (!no_indirection)
240 addr = jit_new_node_pww(code, NULL, rs, rt);
241
242 lightrec_free_regs(reg_cache);
243 regs_backup = lightrec_regcache_enter_branch(reg_cache);
244 }
245
246 if (op_flag_local_branch(op->flags)) {
247 /* Recompile the delay slot */
248 if (!op_flag_no_ds(op->flags) && next->opcode)
249 lightrec_rec_opcode(state, block, offset + 1);
250
251 if (link) {
252 /* Update the $ra register */
253 link_reg = lightrec_alloc_reg_out(reg_cache, _jit, 31, 0);
254 jit_movi(link_reg, link);
255 lightrec_free_reg(reg_cache, link_reg);
256 }
257
258 /* Clean remaining registers */
259 lightrec_clean_regs(reg_cache, _jit);
260
261 target_offset = offset + 1 + (s16)op->i.imm
262 - !!op_flag_no_ds(op->flags);
263 pr_debug("Adding local branch to offset 0x%x\n",
264 target_offset << 2);
265 branch = &state->local_branches[
266 state->nb_local_branches++];
267
268 branch->target = target_offset;
269
270 if (no_indirection)
271 branch->branch = jit_new_node_pww(code2, NULL, rs, rt);
272 else if (is_forward)
273 branch->branch = jit_b();
274 else
275 branch->branch = jit_bgti(LIGHTREC_REG_CYCLE, 0);
276 }
277
278 if (!op_flag_local_branch(op->flags) || !is_forward) {
279 next_pc = get_branch_pc(block, offset, 1 + (s16)op->i.imm);
280 lightrec_emit_end_of_block(state, block, offset, -1, next_pc,
281 31, link, false);
282 }
283
284 if (!unconditional) {
285 if (!no_indirection)
286 jit_patch(addr);
287
288 lightrec_regcache_leave_branch(reg_cache, regs_backup);
289
290 if (bz && link) {
291 /* Update the $ra register */
292 link_reg = lightrec_alloc_reg_out(reg_cache, _jit,
293 31, REG_EXT);
294 jit_movi(link_reg, (s32)link);
295 lightrec_free_reg(reg_cache, link_reg);
296 }
297
298 if (!op_flag_no_ds(op->flags) && next->opcode)
299 lightrec_rec_opcode(state, block, offset + 1);
300 }
301}
302
303static void rec_BNE(struct lightrec_cstate *state,
304 const struct block *block, u16 offset)
305{
306 union code c = block->opcode_list[offset].c;
307
308 _jit_name(block->_jit, __func__);
309
310 if (c.i.rt == 0)
311 rec_b(state, block, offset, jit_code_beqi, jit_code_bnei, 0, false, true);
312 else
313 rec_b(state, block, offset, jit_code_beqr, jit_code_bner, 0, false, false);
314}
315
316static void rec_BEQ(struct lightrec_cstate *state,
317 const struct block *block, u16 offset)
318{
319 union code c = block->opcode_list[offset].c;
320
321 _jit_name(block->_jit, __func__);
322
323 if (c.i.rt == 0)
324 rec_b(state, block, offset, jit_code_bnei, jit_code_beqi, 0, c.i.rs == 0, true);
325 else
326 rec_b(state, block, offset, jit_code_bner, jit_code_beqr, 0, c.i.rs == c.i.rt, false);
327}
328
329static void rec_BLEZ(struct lightrec_cstate *state,
330 const struct block *block, u16 offset)
331{
332 union code c = block->opcode_list[offset].c;
333
334 _jit_name(block->_jit, __func__);
335 rec_b(state, block, offset, jit_code_bgti, jit_code_blei, 0, c.i.rs == 0, true);
336}
337
338static void rec_BGTZ(struct lightrec_cstate *state,
339 const struct block *block, u16 offset)
340{
341 _jit_name(block->_jit, __func__);
342 rec_b(state, block, offset, jit_code_blei, jit_code_bgti, 0, false, true);
343}
344
345static void rec_regimm_BLTZ(struct lightrec_cstate *state,
346 const struct block *block, u16 offset)
347{
348 _jit_name(block->_jit, __func__);
349 rec_b(state, block, offset, jit_code_bgei, jit_code_blti, 0, false, true);
350}
351
352static void rec_regimm_BLTZAL(struct lightrec_cstate *state,
353 const struct block *block, u16 offset)
354{
355 _jit_name(block->_jit, __func__);
356 rec_b(state, block, offset, jit_code_bgei, jit_code_blti,
357 get_branch_pc(block, offset, 2), false, true);
358}
359
360static void rec_regimm_BGEZ(struct lightrec_cstate *state,
361 const struct block *block, u16 offset)
362{
363 union code c = block->opcode_list[offset].c;
364
365 _jit_name(block->_jit, __func__);
366 rec_b(state, block, offset, jit_code_blti, jit_code_bgei, 0, !c.i.rs, true);
367}
368
369static void rec_regimm_BGEZAL(struct lightrec_cstate *state,
370 const struct block *block, u16 offset)
371{
372 const struct opcode *op = &block->opcode_list[offset];
373 _jit_name(block->_jit, __func__);
374 rec_b(state, block, offset, jit_code_blti, jit_code_bgei,
375 get_branch_pc(block, offset, 2),
376 !op->i.rs, true);
377}
378
379static void rec_alu_imm(struct lightrec_cstate *state, const struct block *block,
380 u16 offset, jit_code_t code, bool slti)
381{
382 struct regcache *reg_cache = state->reg_cache;
383 union code c = block->opcode_list[offset].c;
384 jit_state_t *_jit = block->_jit;
385 u8 rs, rt, out_flags = REG_EXT;
386
387 if (slti)
388 out_flags |= REG_ZEXT;
389
390 jit_note(__FILE__, __LINE__);
391 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, REG_EXT);
392 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, out_flags);
393
394 jit_new_node_www(code, rt, rs, (s32)(s16) c.i.imm);
395
396 lightrec_free_reg(reg_cache, rs);
397 lightrec_free_reg(reg_cache, rt);
398}
399
400static void rec_alu_special(struct lightrec_cstate *state, const struct block *block,
401 u16 offset, jit_code_t code, bool out_ext)
402{
403 struct regcache *reg_cache = state->reg_cache;
404 union code c = block->opcode_list[offset].c;
405 jit_state_t *_jit = block->_jit;
406 u8 rd, rt, rs;
407
408 jit_note(__FILE__, __LINE__);
409 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, REG_EXT);
410 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, REG_EXT);
411 rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd,
412 out_ext ? REG_EXT | REG_ZEXT : 0);
413
414 jit_new_node_www(code, rd, rs, rt);
415
416 lightrec_free_reg(reg_cache, rs);
417 lightrec_free_reg(reg_cache, rt);
418 lightrec_free_reg(reg_cache, rd);
419}
420
421static void rec_alu_shiftv(struct lightrec_cstate *state, const struct block *block,
422 u16 offset, jit_code_t code)
423{
424 struct regcache *reg_cache = state->reg_cache;
425 union code c = block->opcode_list[offset].c;
426 jit_state_t *_jit = block->_jit;
427 u8 rd, rt, rs, temp, flags = 0;
428
429 jit_note(__FILE__, __LINE__);
430 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, 0);
431
432 if (code == jit_code_rshr)
433 flags = REG_EXT;
434 else if (code == jit_code_rshr_u)
435 flags = REG_ZEXT;
436
437 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, flags);
438 rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd, flags);
439
440 if (rs != rd && rt != rd) {
441 jit_andi(rd, rs, 0x1f);
442 jit_new_node_www(code, rd, rt, rd);
443 } else {
444 temp = lightrec_alloc_reg_temp(reg_cache, _jit);
445 jit_andi(temp, rs, 0x1f);
446 jit_new_node_www(code, rd, rt, temp);
447 lightrec_free_reg(reg_cache, temp);
448 }
449
450 lightrec_free_reg(reg_cache, rs);
451 lightrec_free_reg(reg_cache, rt);
452 lightrec_free_reg(reg_cache, rd);
453}
454
455static void rec_movi(struct lightrec_cstate *state,
456 const struct block *block, u16 offset)
457{
458 struct regcache *reg_cache = state->reg_cache;
459 union code c = block->opcode_list[offset].c;
460 jit_state_t *_jit = block->_jit;
461 u16 flags = REG_EXT;
462 u8 rt;
463
464 if (!(c.i.imm & 0x8000))
465 flags |= REG_ZEXT;
466
467 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, flags);
468
469 jit_movi(rt, (s32)(s16) c.i.imm);
470
471 lightrec_free_reg(reg_cache, rt);
472}
473
474static void rec_ADDIU(struct lightrec_cstate *state,
475 const struct block *block, u16 offset)
476{
477 _jit_name(block->_jit, __func__);
478
479 if (block->opcode_list[offset].c.i.rs)
480 rec_alu_imm(state, block, offset, jit_code_addi, false);
481 else
482 rec_movi(state, block, offset);
483}
484
485static void rec_ADDI(struct lightrec_cstate *state,
486 const struct block *block, u16 offset)
487{
488 /* TODO: Handle the exception? */
489 _jit_name(block->_jit, __func__);
490 rec_ADDIU(state, block, offset);
491}
492
493static void rec_SLTIU(struct lightrec_cstate *state,
494 const struct block *block, u16 offset)
495{
496 _jit_name(block->_jit, __func__);
497 rec_alu_imm(state, block, offset, jit_code_lti_u, true);
498}
499
500static void rec_SLTI(struct lightrec_cstate *state,
501 const struct block *block, u16 offset)
502{
503 _jit_name(block->_jit, __func__);
504 rec_alu_imm(state, block, offset, jit_code_lti, true);
505}
506
507static void rec_ANDI(struct lightrec_cstate *state,
508 const struct block *block, u16 offset)
509{
510 struct regcache *reg_cache = state->reg_cache;
511 union code c = block->opcode_list[offset].c;
512 jit_state_t *_jit = block->_jit;
513 u8 rs, rt;
514
515 _jit_name(block->_jit, __func__);
516 jit_note(__FILE__, __LINE__);
517 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
518 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt,
519 REG_EXT | REG_ZEXT);
520
521 /* PSX code uses ANDI 0xff / ANDI 0xffff a lot, which are basically
522 * casts to uint8_t / uint16_t. */
523 if (c.i.imm == 0xff)
524 jit_extr_uc(rt, rs);
525 else if (c.i.imm == 0xffff)
526 jit_extr_us(rt, rs);
527 else
528 jit_andi(rt, rs, (u32)(u16) c.i.imm);
529
530 lightrec_free_reg(reg_cache, rs);
531 lightrec_free_reg(reg_cache, rt);
532}
533
534static void rec_alu_or_xor(struct lightrec_cstate *state, const struct block *block,
535 u16 offset, jit_code_t code)
536{
537 struct regcache *reg_cache = state->reg_cache;
538 union code c = block->opcode_list[offset].c;
539 jit_state_t *_jit = block->_jit;
540 u8 rs, rt, flags;
541
542 jit_note(__FILE__, __LINE__);
543 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
544 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, 0);
545
546 flags = lightrec_get_reg_in_flags(reg_cache, rs);
547 lightrec_set_reg_out_flags(reg_cache, rt, flags);
548
549 jit_new_node_www(code, rt, rs, (u32)(u16) c.i.imm);
550
551 lightrec_free_reg(reg_cache, rs);
552 lightrec_free_reg(reg_cache, rt);
553}
554
555
556static void rec_ORI(struct lightrec_cstate *state,
557 const struct block *block, u16 offset)
558{
559 _jit_name(block->_jit, __func__);
560 rec_alu_or_xor(state, block, offset, jit_code_ori);
561}
562
563static void rec_XORI(struct lightrec_cstate *state,
564 const struct block *block, u16 offset)
565{
566 _jit_name(block->_jit, __func__);
567 rec_alu_or_xor(state, block, offset, jit_code_xori);
568}
569
570static void rec_LUI(struct lightrec_cstate *state,
571 const struct block *block, u16 offset)
572{
573 struct regcache *reg_cache = state->reg_cache;
574 union code c = block->opcode_list[offset].c;
575 jit_state_t *_jit = block->_jit;
576 u8 rt, flags = REG_EXT;
577
578 jit_name(__func__);
579 jit_note(__FILE__, __LINE__);
580
581 if (!(c.i.imm & BIT(15)))
582 flags |= REG_ZEXT;
583
584 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, flags);
585
586 jit_movi(rt, (s32)(c.i.imm << 16));
587
588 lightrec_free_reg(reg_cache, rt);
589}
590
591static void rec_special_ADDU(struct lightrec_cstate *state,
592 const struct block *block, u16 offset)
593{
594 _jit_name(block->_jit, __func__);
595 rec_alu_special(state, block, offset, jit_code_addr, false);
596}
597
598static void rec_special_ADD(struct lightrec_cstate *state,
599 const struct block *block, u16 offset)
600{
601 /* TODO: Handle the exception? */
602 _jit_name(block->_jit, __func__);
603 rec_alu_special(state, block, offset, jit_code_addr, false);
604}
605
606static void rec_special_SUBU(struct lightrec_cstate *state,
607 const struct block *block, u16 offset)
608{
609 _jit_name(block->_jit, __func__);
610 rec_alu_special(state, block, offset, jit_code_subr, false);
611}
612
613static void rec_special_SUB(struct lightrec_cstate *state,
614 const struct block *block, u16 offset)
615{
616 /* TODO: Handle the exception? */
617 _jit_name(block->_jit, __func__);
618 rec_alu_special(state, block, offset, jit_code_subr, false);
619}
620
621static void rec_special_AND(struct lightrec_cstate *state,
622 const struct block *block, u16 offset)
623{
624 struct regcache *reg_cache = state->reg_cache;
625 union code c = block->opcode_list[offset].c;
626 jit_state_t *_jit = block->_jit;
627 u8 rd, rt, rs, flags_rs, flags_rt, flags_rd;
628
629 _jit_name(block->_jit, __func__);
630 jit_note(__FILE__, __LINE__);
631 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, 0);
632 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, 0);
633 rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd, 0);
634
635 flags_rs = lightrec_get_reg_in_flags(reg_cache, rs);
636 flags_rt = lightrec_get_reg_in_flags(reg_cache, rt);
637
638 /* Z(rd) = Z(rs) | Z(rt) */
639 flags_rd = REG_ZEXT & (flags_rs | flags_rt);
640
641 /* E(rd) = (E(rt) & Z(rt)) | (E(rs) & Z(rs)) | (E(rs) & E(rt)) */
642 if (((flags_rs & REG_EXT) && (flags_rt & REG_ZEXT)) ||
643 ((flags_rt & REG_EXT) && (flags_rs & REG_ZEXT)) ||
644 (REG_EXT & flags_rs & flags_rt))
645 flags_rd |= REG_EXT;
646
647 lightrec_set_reg_out_flags(reg_cache, rd, flags_rd);
648
649 jit_andr(rd, rs, rt);
650
651 lightrec_free_reg(reg_cache, rs);
652 lightrec_free_reg(reg_cache, rt);
653 lightrec_free_reg(reg_cache, rd);
654}
655
656static void rec_special_or_nor(struct lightrec_cstate *state,
657 const struct block *block, u16 offset, bool nor)
658{
659 struct regcache *reg_cache = state->reg_cache;
660 union code c = block->opcode_list[offset].c;
661 jit_state_t *_jit = block->_jit;
662 u8 rd, rt, rs, flags_rs, flags_rt, flags_rd = 0;
663
664 jit_note(__FILE__, __LINE__);
665 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, 0);
666 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, 0);
667 rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd, 0);
668
669 flags_rs = lightrec_get_reg_in_flags(reg_cache, rs);
670 flags_rt = lightrec_get_reg_in_flags(reg_cache, rt);
671
672 /* or: Z(rd) = Z(rs) & Z(rt)
673 * nor: Z(rd) = 0 */
674 if (!nor)
675 flags_rd = REG_ZEXT & flags_rs & flags_rt;
676
677 /* E(rd) = E(rs) & E(rt) */
678 if (REG_EXT & flags_rs & flags_rt)
679 flags_rd |= REG_EXT;
680
681 lightrec_set_reg_out_flags(reg_cache, rd, flags_rd);
682
683 jit_orr(rd, rs, rt);
684
685 if (nor)
686 jit_comr(rd, rd);
687
688 lightrec_free_reg(reg_cache, rs);
689 lightrec_free_reg(reg_cache, rt);
690 lightrec_free_reg(reg_cache, rd);
691}
692
693static void rec_special_OR(struct lightrec_cstate *state,
694 const struct block *block, u16 offset)
695{
696 _jit_name(block->_jit, __func__);
697 rec_special_or_nor(state, block, offset, false);
698}
699
700static void rec_special_NOR(struct lightrec_cstate *state,
701 const struct block *block, u16 offset)
702{
703 _jit_name(block->_jit, __func__);
704 rec_special_or_nor(state, block, offset, true);
705}
706
707static void rec_special_XOR(struct lightrec_cstate *state,
708 const struct block *block, u16 offset)
709{
710 struct regcache *reg_cache = state->reg_cache;
711 union code c = block->opcode_list[offset].c;
712 jit_state_t *_jit = block->_jit;
713 u8 rd, rt, rs, flags_rs, flags_rt, flags_rd;
714
715 _jit_name(block->_jit, __func__);
716
717 jit_note(__FILE__, __LINE__);
718 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, 0);
719 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, 0);
720 rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd, 0);
721
722 flags_rs = lightrec_get_reg_in_flags(reg_cache, rs);
723 flags_rt = lightrec_get_reg_in_flags(reg_cache, rt);
724
725 /* Z(rd) = Z(rs) & Z(rt) */
726 flags_rd = REG_ZEXT & flags_rs & flags_rt;
727
728 /* E(rd) = E(rs) & E(rt) */
729 flags_rd |= REG_EXT & flags_rs & flags_rt;
730
731 lightrec_set_reg_out_flags(reg_cache, rd, flags_rd);
732
733 jit_xorr(rd, rs, rt);
734
735 lightrec_free_reg(reg_cache, rs);
736 lightrec_free_reg(reg_cache, rt);
737 lightrec_free_reg(reg_cache, rd);
738}
739
740static void rec_special_SLTU(struct lightrec_cstate *state,
741 const struct block *block, u16 offset)
742{
743 _jit_name(block->_jit, __func__);
744 rec_alu_special(state, block, offset, jit_code_ltr_u, true);
745}
746
747static void rec_special_SLT(struct lightrec_cstate *state,
748 const struct block *block, u16 offset)
749{
750 _jit_name(block->_jit, __func__);
751 rec_alu_special(state, block, offset, jit_code_ltr, true);
752}
753
754static void rec_special_SLLV(struct lightrec_cstate *state,
755 const struct block *block, u16 offset)
756{
757 _jit_name(block->_jit, __func__);
758 rec_alu_shiftv(state, block, offset, jit_code_lshr);
759}
760
761static void rec_special_SRLV(struct lightrec_cstate *state,
762 const struct block *block, u16 offset)
763{
764 _jit_name(block->_jit, __func__);
765 rec_alu_shiftv(state, block, offset, jit_code_rshr_u);
766}
767
768static void rec_special_SRAV(struct lightrec_cstate *state,
769 const struct block *block, u16 offset)
770{
771 _jit_name(block->_jit, __func__);
772 rec_alu_shiftv(state, block, offset, jit_code_rshr);
773}
774
775static void rec_alu_shift(struct lightrec_cstate *state, const struct block *block,
776 u16 offset, jit_code_t code)
777{
778 struct regcache *reg_cache = state->reg_cache;
779 union code c = block->opcode_list[offset].c;
780 jit_state_t *_jit = block->_jit;
781 u8 rd, rt, flags = 0;
782
783 jit_note(__FILE__, __LINE__);
784
785 if (code == jit_code_rshi)
786 flags = REG_EXT;
787 else if (code == jit_code_rshi_u)
788 flags = REG_ZEXT;
789
790 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, flags);
791
792 /* Input reg is zero-extended, if we SRL at least by one bit, we know
793 * the output reg will be both zero-extended and sign-extended. */
794 if (code == jit_code_rshi_u && c.r.imm)
795 flags |= REG_EXT;
796 rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd, flags);
797
798 jit_new_node_www(code, rd, rt, c.r.imm);
799
800 lightrec_free_reg(reg_cache, rt);
801 lightrec_free_reg(reg_cache, rd);
802}
803
804static void rec_special_SLL(struct lightrec_cstate *state,
805 const struct block *block, u16 offset)
806{
807 _jit_name(block->_jit, __func__);
808 rec_alu_shift(state, block, offset, jit_code_lshi);
809}
810
811static void rec_special_SRL(struct lightrec_cstate *state,
812 const struct block *block, u16 offset)
813{
814 _jit_name(block->_jit, __func__);
815 rec_alu_shift(state, block, offset, jit_code_rshi_u);
816}
817
818static void rec_special_SRA(struct lightrec_cstate *state,
819 const struct block *block, u16 offset)
820{
821 _jit_name(block->_jit, __func__);
822 rec_alu_shift(state, block, offset, jit_code_rshi);
823}
824
825static void rec_alu_mult(struct lightrec_cstate *state,
826 const struct block *block, u16 offset, bool is_signed)
827{
828 struct regcache *reg_cache = state->reg_cache;
829 union code c = block->opcode_list[offset].c;
830 u32 flags = block->opcode_list[offset].flags;
831 u8 reg_lo = get_mult_div_lo(c);
832 u8 reg_hi = get_mult_div_hi(c);
833 jit_state_t *_jit = block->_jit;
834 u8 lo, hi, rs, rt, rflags = 0;
835
836 jit_note(__FILE__, __LINE__);
837
838 if (is_signed)
839 rflags = REG_EXT;
840 else
841 rflags = REG_ZEXT;
842
843 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, rflags);
844 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, rflags);
845
846 if (!op_flag_no_lo(flags))
847 lo = lightrec_alloc_reg_out(reg_cache, _jit, reg_lo, 0);
848 else if (__WORDSIZE == 32)
849 lo = lightrec_alloc_reg_temp(reg_cache, _jit);
850
851 if (!op_flag_no_hi(flags))
852 hi = lightrec_alloc_reg_out(reg_cache, _jit, reg_hi, REG_EXT);
853
854 if (__WORDSIZE == 32) {
855 /* On 32-bit systems, do a 32*32->64 bit operation, or a 32*32->32 bit
856 * operation if the MULT was detected a 32-bit only. */
857 if (!op_flag_no_hi(flags)) {
858 if (is_signed)
859 jit_qmulr(lo, hi, rs, rt);
860 else
861 jit_qmulr_u(lo, hi, rs, rt);
862 } else {
863 jit_mulr(lo, rs, rt);
864 }
865 } else {
866 /* On 64-bit systems, do a 64*64->64 bit operation. */
867 if (op_flag_no_lo(flags)) {
868 jit_mulr(hi, rs, rt);
869 jit_rshi(hi, hi, 32);
870 } else {
871 jit_mulr(lo, rs, rt);
872
873 /* The 64-bit output value is in $lo, store the upper 32 bits in $hi */
874 if (!op_flag_no_hi(flags))
875 jit_rshi(hi, lo, 32);
876 }
877 }
878
879 lightrec_free_reg(reg_cache, rs);
880 lightrec_free_reg(reg_cache, rt);
881 if (!op_flag_no_lo(flags) || __WORDSIZE == 32)
882 lightrec_free_reg(reg_cache, lo);
883 if (!op_flag_no_hi(flags))
884 lightrec_free_reg(reg_cache, hi);
885}
886
887static void rec_alu_div(struct lightrec_cstate *state,
888 const struct block *block, u16 offset, bool is_signed)
889{
890 struct regcache *reg_cache = state->reg_cache;
891 union code c = block->opcode_list[offset].c;
892 u32 flags = block->opcode_list[offset].flags;
893 bool no_check = op_flag_no_div_check(flags);
894 u8 reg_lo = get_mult_div_lo(c);
895 u8 reg_hi = get_mult_div_hi(c);
896 jit_state_t *_jit = block->_jit;
897 jit_node_t *branch, *to_end;
898 u8 lo = 0, hi = 0, rs, rt, rflags = 0;
899
900 jit_note(__FILE__, __LINE__);
901
902 if (is_signed)
903 rflags = REG_EXT;
904 else
905 rflags = REG_ZEXT;
906
907 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, rflags);
908 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, rflags);
909
910 if (!op_flag_no_lo(flags))
911 lo = lightrec_alloc_reg_out(reg_cache, _jit, reg_lo, 0);
912
913 if (!op_flag_no_hi(flags))
914 hi = lightrec_alloc_reg_out(reg_cache, _jit, reg_hi, 0);
915
916 /* Jump to special handler if dividing by zero */
917 if (!no_check)
918 branch = jit_beqi(rt, 0);
919
920 if (op_flag_no_lo(flags)) {
921 if (is_signed)
922 jit_remr(hi, rs, rt);
923 else
924 jit_remr_u(hi, rs, rt);
925 } else if (op_flag_no_hi(flags)) {
926 if (is_signed)
927 jit_divr(lo, rs, rt);
928 else
929 jit_divr_u(lo, rs, rt);
930 } else {
931 if (is_signed)
932 jit_qdivr(lo, hi, rs, rt);
933 else
934 jit_qdivr_u(lo, hi, rs, rt);
935 }
936
937 if (!no_check) {
938 /* Jump above the div-by-zero handler */
939 to_end = jit_b();
940
941 jit_patch(branch);
942
943 if (!op_flag_no_lo(flags)) {
944 if (is_signed) {
945 jit_lti(lo, rs, 0);
946 jit_lshi(lo, lo, 1);
947 jit_subi(lo, lo, 1);
948 } else {
949 jit_movi(lo, 0xffffffff);
950 }
951 }
952
953 if (!op_flag_no_hi(flags))
954 jit_movr(hi, rs);
955
956 jit_patch(to_end);
957 }
958
959 lightrec_free_reg(reg_cache, rs);
960 lightrec_free_reg(reg_cache, rt);
961
962 if (!op_flag_no_lo(flags))
963 lightrec_free_reg(reg_cache, lo);
964
965 if (!op_flag_no_hi(flags))
966 lightrec_free_reg(reg_cache, hi);
967}
968
969static void rec_special_MULT(struct lightrec_cstate *state,
970 const struct block *block, u16 offset)
971{
972 _jit_name(block->_jit, __func__);
973 rec_alu_mult(state, block, offset, true);
974}
975
976static void rec_special_MULTU(struct lightrec_cstate *state,
977 const struct block *block, u16 offset)
978{
979 _jit_name(block->_jit, __func__);
980 rec_alu_mult(state, block, offset, false);
981}
982
983static void rec_special_DIV(struct lightrec_cstate *state,
984 const struct block *block, u16 offset)
985{
986 _jit_name(block->_jit, __func__);
987 rec_alu_div(state, block, offset, true);
988}
989
990static void rec_special_DIVU(struct lightrec_cstate *state,
991 const struct block *block, u16 offset)
992{
993 _jit_name(block->_jit, __func__);
994 rec_alu_div(state, block, offset, false);
995}
996
997static void rec_alu_mv_lo_hi(struct lightrec_cstate *state,
998 const struct block *block, u8 dst, u8 src)
999{
1000 struct regcache *reg_cache = state->reg_cache;
1001 jit_state_t *_jit = block->_jit;
1002
1003 jit_note(__FILE__, __LINE__);
1004 src = lightrec_alloc_reg_in(reg_cache, _jit, src, 0);
1005 dst = lightrec_alloc_reg_out(reg_cache, _jit, dst, REG_EXT);
1006
1007 jit_extr_i(dst, src);
1008
1009 lightrec_free_reg(reg_cache, src);
1010 lightrec_free_reg(reg_cache, dst);
1011}
1012
1013static void rec_special_MFHI(struct lightrec_cstate *state,
1014 const struct block *block, u16 offset)
1015{
1016 union code c = block->opcode_list[offset].c;
1017
1018 _jit_name(block->_jit, __func__);
1019 rec_alu_mv_lo_hi(state, block, c.r.rd, REG_HI);
1020}
1021
1022static void rec_special_MTHI(struct lightrec_cstate *state,
1023 const struct block *block, u16 offset)
1024{
1025 union code c = block->opcode_list[offset].c;
1026
1027 _jit_name(block->_jit, __func__);
1028 rec_alu_mv_lo_hi(state, block, REG_HI, c.r.rs);
1029}
1030
1031static void rec_special_MFLO(struct lightrec_cstate *state,
1032 const struct block *block, u16 offset)
1033{
1034 union code c = block->opcode_list[offset].c;
1035
1036 _jit_name(block->_jit, __func__);
1037 rec_alu_mv_lo_hi(state, block, c.r.rd, REG_LO);
1038}
1039
1040static void rec_special_MTLO(struct lightrec_cstate *state,
1041 const struct block *block, u16 offset)
1042{
1043 union code c = block->opcode_list[offset].c;
1044
1045 _jit_name(block->_jit, __func__);
1046 rec_alu_mv_lo_hi(state, block, REG_LO, c.r.rs);
1047}
1048
1049static void call_to_c_wrapper(struct lightrec_cstate *state,
1050 const struct block *block, u32 arg,
1051 enum c_wrappers wrapper)
1052{
1053 struct regcache *reg_cache = state->reg_cache;
1054 jit_state_t *_jit = block->_jit;
1055 s8 tmp, tmp2;
1056
1057 /* Make sure JIT_R1 is not mapped; it will be used in the C wrapper. */
1058 tmp2 = lightrec_alloc_reg(reg_cache, _jit, JIT_R1);
1059
1060 tmp = lightrec_get_reg_with_value(reg_cache,
1061 (intptr_t) state->state->wrappers_eps[wrapper]);
1062 if (tmp < 0) {
1063 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1064 jit_ldxi(tmp, LIGHTREC_REG_STATE,
1065 offsetof(struct lightrec_state, wrappers_eps[wrapper]));
1066
1067 lightrec_temp_set_value(reg_cache, tmp,
1068 (intptr_t) state->state->wrappers_eps[wrapper]);
1069 }
1070
1071 lightrec_free_reg(reg_cache, tmp2);
1072
1073#ifdef __mips__
1074 /* On MIPS, register t9 is always used as the target register for JALR.
1075 * Therefore if it does not contain the target address we must
1076 * invalidate it. */
1077 if (tmp != _T9)
1078 lightrec_unload_reg(reg_cache, _jit, _T9);
1079#endif
1080
1081 jit_prepare();
1082 jit_pushargi(arg);
1083
1084 lightrec_regcache_mark_live(reg_cache, _jit);
1085 jit_callr(tmp);
1086
1087 lightrec_free_reg(reg_cache, tmp);
1088 lightrec_regcache_mark_live(reg_cache, _jit);
1089}
1090
1091static void rec_io(struct lightrec_cstate *state,
1092 const struct block *block, u16 offset,
1093 bool load_rt, bool read_rt)
1094{
1095 struct regcache *reg_cache = state->reg_cache;
1096 jit_state_t *_jit = block->_jit;
1097 union code c = block->opcode_list[offset].c;
1098 u32 flags = block->opcode_list[offset].flags;
1099 bool is_tagged = LIGHTREC_FLAGS_GET_IO_MODE(flags);
1100 u32 lut_entry;
1101
1102 jit_note(__FILE__, __LINE__);
1103
1104 lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rs, false);
1105
1106 if (read_rt && likely(c.i.rt))
1107 lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rt, true);
1108 else if (load_rt)
1109 lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rt, false);
1110
1111 if (is_tagged) {
1112 call_to_c_wrapper(state, block, c.opcode, C_WRAPPER_RW);
1113 } else {
1114 lut_entry = lightrec_get_lut_entry(block);
1115 call_to_c_wrapper(state, block, (lut_entry << 16) | offset,
1116 C_WRAPPER_RW_GENERIC);
1117 }
1118}
1119
1120static u32 rec_ram_mask(struct lightrec_state *state)
1121{
1122 return (RAM_SIZE << (state->mirrors_mapped * 2)) - 1;
1123}
1124
1125static u32 rec_io_mask(const struct lightrec_state *state)
1126{
1127 u32 length = state->maps[PSX_MAP_HW_REGISTERS].length;
1128
1129 return GENMASK(31 - clz32(length - 1), 0);
1130}
1131
1132static void rec_store_memory(struct lightrec_cstate *cstate,
1133 const struct block *block,
1134 u16 offset, jit_code_t code,
1135 jit_code_t swap_code,
1136 uintptr_t addr_offset, u32 addr_mask,
1137 bool invalidate)
1138{
1139 const struct lightrec_state *state = cstate->state;
1140 struct regcache *reg_cache = cstate->reg_cache;
1141 struct opcode *op = &block->opcode_list[offset];
1142 jit_state_t *_jit = block->_jit;
1143 union code c = op->c;
1144 u8 rs, rt, tmp, tmp2, tmp3, addr_reg, addr_reg2;
1145 s16 imm = (s16)c.i.imm;
1146 s32 simm = (s32)imm << (1 - lut_is_32bit(state));
1147 s32 lut_offt = offsetof(struct lightrec_state, code_lut);
1148 bool no_mask = op_flag_no_mask(op->flags);
1149 bool add_imm = c.i.imm &&
1150 ((!state->mirrors_mapped && !no_mask) || (invalidate &&
1151 ((imm & 0x3) || simm + lut_offt != (s16)(simm + lut_offt))));
1152 bool need_tmp = !no_mask || addr_offset || add_imm || invalidate;
1153
1154 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rt, 0);
1155 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
1156 if (need_tmp)
1157 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1158
1159 addr_reg = rs;
1160
1161 if (add_imm) {
1162 jit_addi(tmp, addr_reg, (s16)c.i.imm);
1163 addr_reg = tmp;
1164 imm = 0;
1165 } else if (simm) {
1166 lut_offt += simm;
1167 }
1168
1169 if (!no_mask) {
1170 jit_andi(tmp, addr_reg, addr_mask);
1171 addr_reg = tmp;
1172 }
1173
1174 if (addr_offset) {
1175 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
1176 jit_addi(tmp2, addr_reg, addr_offset);
1177 addr_reg2 = tmp2;
1178 } else {
1179 addr_reg2 = addr_reg;
1180 }
1181
1182 if (is_big_endian() && swap_code && c.i.rt) {
1183 tmp3 = lightrec_alloc_reg_temp(reg_cache, _jit);
1184
1185 jit_new_node_ww(swap_code, tmp3, rt);
1186 jit_new_node_www(code, imm, addr_reg2, tmp3);
1187
1188 lightrec_free_reg(reg_cache, tmp3);
1189 } else {
1190 jit_new_node_www(code, imm, addr_reg2, rt);
1191 }
1192
1193 lightrec_free_reg(reg_cache, rt);
1194
1195 if (invalidate) {
1196 tmp3 = lightrec_alloc_reg_in(reg_cache, _jit, 0, 0);
1197
1198 if (c.i.op != OP_SW) {
1199 jit_andi(tmp, addr_reg, ~3);
1200 addr_reg = tmp;
1201 }
1202
1203 if (!lut_is_32bit(state)) {
1204 jit_lshi(tmp, addr_reg, 1);
1205 addr_reg = tmp;
1206 }
1207
1208 if (addr_reg == rs && c.i.rs == 0) {
1209 addr_reg = LIGHTREC_REG_STATE;
1210 } else {
1211 jit_addr(tmp, addr_reg, LIGHTREC_REG_STATE);
1212 addr_reg = tmp;
1213 }
1214
1215 if (lut_is_32bit(state))
1216 jit_stxi_i(lut_offt, addr_reg, tmp3);
1217 else
1218 jit_stxi(lut_offt, addr_reg, tmp3);
1219
1220 lightrec_free_reg(reg_cache, tmp3);
1221 }
1222
1223 if (addr_offset)
1224 lightrec_free_reg(reg_cache, tmp2);
1225 if (need_tmp)
1226 lightrec_free_reg(reg_cache, tmp);
1227 lightrec_free_reg(reg_cache, rs);
1228}
1229
1230static void rec_store_ram(struct lightrec_cstate *cstate,
1231 const struct block *block,
1232 u16 offset, jit_code_t code,
1233 jit_code_t swap_code, bool invalidate)
1234{
1235 struct lightrec_state *state = cstate->state;
1236
1237 _jit_note(block->_jit, __FILE__, __LINE__);
1238
1239 return rec_store_memory(cstate, block, offset, code, swap_code,
1240 state->offset_ram, rec_ram_mask(state),
1241 invalidate);
1242}
1243
1244static void rec_store_scratch(struct lightrec_cstate *cstate,
1245 const struct block *block, u16 offset,
1246 jit_code_t code, jit_code_t swap_code)
1247{
1248 _jit_note(block->_jit, __FILE__, __LINE__);
1249
1250 return rec_store_memory(cstate, block, offset, code, swap_code,
1251 cstate->state->offset_scratch,
1252 0x1fffffff, false);
1253}
1254
1255static void rec_store_io(struct lightrec_cstate *cstate,
1256 const struct block *block, u16 offset,
1257 jit_code_t code, jit_code_t swap_code)
1258{
1259 _jit_note(block->_jit, __FILE__, __LINE__);
1260
1261 return rec_store_memory(cstate, block, offset, code, swap_code,
1262 cstate->state->offset_io,
1263 rec_io_mask(cstate->state), false);
1264}
1265
1266static void rec_store_direct_no_invalidate(struct lightrec_cstate *cstate,
1267 const struct block *block,
1268 u16 offset, jit_code_t code,
1269 jit_code_t swap_code)
1270{
1271 struct lightrec_state *state = cstate->state;
1272 struct regcache *reg_cache = cstate->reg_cache;
1273 union code c = block->opcode_list[offset].c;
1274 jit_state_t *_jit = block->_jit;
1275 jit_node_t *to_not_ram, *to_end;
1276 u8 tmp, tmp2, rs, rt;
1277 s16 imm;
1278
1279 jit_note(__FILE__, __LINE__);
1280 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
1281 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1282
1283 if (state->offset_ram || state->offset_scratch)
1284 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
1285
1286 /* Convert to KUNSEG and avoid RAM mirrors */
1287 if (state->mirrors_mapped) {
1288 imm = (s16)c.i.imm;
1289 jit_andi(tmp, rs, 0x1f800000 | (4 * RAM_SIZE - 1));
1290 } else if (c.i.imm) {
1291 imm = 0;
1292 jit_addi(tmp, rs, (s16)c.i.imm);
1293 jit_andi(tmp, tmp, 0x1f800000 | (RAM_SIZE - 1));
1294 } else {
1295 imm = 0;
1296 jit_andi(tmp, rs, 0x1f800000 | (RAM_SIZE - 1));
1297 }
1298
1299 lightrec_free_reg(reg_cache, rs);
1300
1301 if (state->offset_ram != state->offset_scratch) {
1302 to_not_ram = jit_bmsi(tmp, BIT(28));
1303
1304 jit_movi(tmp2, state->offset_ram);
1305
1306 to_end = jit_b();
1307 jit_patch(to_not_ram);
1308
1309 jit_movi(tmp2, state->offset_scratch);
1310 jit_patch(to_end);
1311 } else if (state->offset_ram) {
1312 jit_movi(tmp2, state->offset_ram);
1313 }
1314
1315 if (state->offset_ram || state->offset_scratch) {
1316 jit_addr(tmp, tmp, tmp2);
1317 lightrec_free_reg(reg_cache, tmp2);
1318 }
1319
1320 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rt, 0);
1321
1322 if (is_big_endian() && swap_code && c.i.rt) {
1323 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
1324
1325 jit_new_node_ww(swap_code, tmp2, rt);
1326 jit_new_node_www(code, imm, tmp, tmp2);
1327
1328 lightrec_free_reg(reg_cache, tmp2);
1329 } else {
1330 jit_new_node_www(code, imm, tmp, rt);
1331 }
1332
1333 lightrec_free_reg(reg_cache, rt);
1334 lightrec_free_reg(reg_cache, tmp);
1335}
1336
1337static void rec_store_direct(struct lightrec_cstate *cstate, const struct block *block,
1338 u16 offset, jit_code_t code, jit_code_t swap_code)
1339{
1340 struct lightrec_state *state = cstate->state;
1341 u32 ram_size = state->mirrors_mapped ? RAM_SIZE * 4 : RAM_SIZE;
1342 struct regcache *reg_cache = cstate->reg_cache;
1343 union code c = block->opcode_list[offset].c;
1344 jit_state_t *_jit = block->_jit;
1345 jit_node_t *to_not_ram, *to_end;
1346 u8 tmp, tmp2, tmp3, rs, rt;
1347
1348 jit_note(__FILE__, __LINE__);
1349
1350 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
1351 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
1352 tmp3 = lightrec_alloc_reg_in(reg_cache, _jit, 0, 0);
1353
1354 /* Convert to KUNSEG and avoid RAM mirrors */
1355 if (c.i.imm) {
1356 jit_addi(tmp2, rs, (s16)c.i.imm);
1357 jit_andi(tmp2, tmp2, 0x1f800000 | (ram_size - 1));
1358 } else {
1359 jit_andi(tmp2, rs, 0x1f800000 | (ram_size - 1));
1360 }
1361
1362 lightrec_free_reg(reg_cache, rs);
1363 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1364
1365 to_not_ram = jit_bgti(tmp2, ram_size);
1366
1367 /* Compute the offset to the code LUT */
1368 jit_andi(tmp, tmp2, (RAM_SIZE - 1) & ~3);
1369 if (!lut_is_32bit(state))
1370 jit_lshi(tmp, tmp, 1);
1371 jit_addr(tmp, LIGHTREC_REG_STATE, tmp);
1372
1373 /* Write NULL to the code LUT to invalidate any block that's there */
1374 if (lut_is_32bit(state))
1375 jit_stxi_i(offsetof(struct lightrec_state, code_lut), tmp, tmp3);
1376 else
1377 jit_stxi(offsetof(struct lightrec_state, code_lut), tmp, tmp3);
1378
1379 if (state->offset_ram != state->offset_scratch) {
1380 jit_movi(tmp, state->offset_ram);
1381
1382 to_end = jit_b();
1383 }
1384
1385 jit_patch(to_not_ram);
1386
1387 if (state->offset_ram || state->offset_scratch)
1388 jit_movi(tmp, state->offset_scratch);
1389
1390 if (state->offset_ram != state->offset_scratch)
1391 jit_patch(to_end);
1392
1393 if (state->offset_ram || state->offset_scratch)
1394 jit_addr(tmp2, tmp2, tmp);
1395
1396 lightrec_free_reg(reg_cache, tmp);
1397 lightrec_free_reg(reg_cache, tmp3);
1398
1399 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rt, 0);
1400
1401 if (is_big_endian() && swap_code && c.i.rt) {
1402 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1403
1404 jit_new_node_ww(swap_code, tmp, rt);
1405 jit_new_node_www(code, 0, tmp2, tmp);
1406
1407 lightrec_free_reg(reg_cache, tmp);
1408 } else {
1409 jit_new_node_www(code, 0, tmp2, rt);
1410 }
1411
1412 lightrec_free_reg(reg_cache, rt);
1413 lightrec_free_reg(reg_cache, tmp2);
1414}
1415
1416static void rec_store(struct lightrec_cstate *state,
1417 const struct block *block, u16 offset,
1418 jit_code_t code, jit_code_t swap_code)
1419{
1420 u32 flags = block->opcode_list[offset].flags;
1421 bool no_invalidate = op_flag_no_invalidate(flags) ||
1422 state->state->invalidate_from_dma_only;
1423
1424 switch (LIGHTREC_FLAGS_GET_IO_MODE(flags)) {
1425 case LIGHTREC_IO_RAM:
1426 rec_store_ram(state, block, offset, code,
1427 swap_code, !no_invalidate);
1428 break;
1429 case LIGHTREC_IO_SCRATCH:
1430 rec_store_scratch(state, block, offset, code, swap_code);
1431 break;
1432 case LIGHTREC_IO_DIRECT:
1433 if (no_invalidate) {
1434 rec_store_direct_no_invalidate(state, block, offset,
1435 code, swap_code);
1436 } else {
1437 rec_store_direct(state, block, offset, code, swap_code);
1438 }
1439 break;
1440 case LIGHTREC_IO_DIRECT_HW:
1441 rec_store_io(state, block, offset, code, swap_code);
1442 break;
1443 default:
1444 rec_io(state, block, offset, true, false);
1445 break;
1446 }
1447}
1448
1449static void rec_SB(struct lightrec_cstate *state,
1450 const struct block *block, u16 offset)
1451{
1452 _jit_name(block->_jit, __func__);
1453 rec_store(state, block, offset, jit_code_stxi_c, 0);
1454}
1455
1456static void rec_SH(struct lightrec_cstate *state,
1457 const struct block *block, u16 offset)
1458{
1459 _jit_name(block->_jit, __func__);
1460 rec_store(state, block, offset,
1461 jit_code_stxi_s, jit_code_bswapr_us);
1462}
1463
1464static void rec_SW(struct lightrec_cstate *state,
1465 const struct block *block, u16 offset)
1466
1467{
1468 _jit_name(block->_jit, __func__);
1469 rec_store(state, block, offset,
1470 jit_code_stxi_i, jit_code_bswapr_ui);
1471}
1472
1473static void rec_SWL(struct lightrec_cstate *state,
1474 const struct block *block, u16 offset)
1475{
1476 _jit_name(block->_jit, __func__);
1477 rec_io(state, block, offset, true, false);
1478}
1479
1480static void rec_SWR(struct lightrec_cstate *state,
1481 const struct block *block, u16 offset)
1482{
1483 _jit_name(block->_jit, __func__);
1484 rec_io(state, block, offset, true, false);
1485}
1486
1487static void rec_SWC2(struct lightrec_cstate *state,
1488 const struct block *block, u16 offset)
1489{
1490 _jit_name(block->_jit, __func__);
1491 rec_io(state, block, offset, false, false);
1492}
1493
1494static void rec_load_memory(struct lightrec_cstate *cstate,
1495 const struct block *block, u16 offset,
1496 jit_code_t code, jit_code_t swap_code, bool is_unsigned,
1497 uintptr_t addr_offset, u32 addr_mask)
1498{
1499 struct regcache *reg_cache = cstate->reg_cache;
1500 struct opcode *op = &block->opcode_list[offset];
1501 jit_state_t *_jit = block->_jit;
1502 u8 rs, rt, addr_reg, flags = REG_EXT;
1503 bool no_mask = op_flag_no_mask(op->flags);
1504 union code c = op->c;
1505 s16 imm;
1506
1507 if (!c.i.rt)
1508 return;
1509
1510 if (is_unsigned)
1511 flags |= REG_ZEXT;
1512
1513 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
1514 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, flags);
1515
1516 if (!cstate->state->mirrors_mapped && c.i.imm && !no_mask) {
1517 jit_addi(rt, rs, (s16)c.i.imm);
1518 addr_reg = rt;
1519 imm = 0;
1520 } else {
1521 addr_reg = rs;
1522 imm = (s16)c.i.imm;
1523 }
1524
1525 if (!no_mask) {
1526 jit_andi(rt, addr_reg, addr_mask);
1527 addr_reg = rt;
1528 }
1529
1530 if (addr_offset) {
1531 jit_addi(rt, addr_reg, addr_offset);
1532 addr_reg = rt;
1533 }
1534
1535 jit_new_node_www(code, rt, addr_reg, imm);
1536
1537 if (is_big_endian() && swap_code) {
1538 jit_new_node_ww(swap_code, rt, rt);
1539
1540 if (c.i.op == OP_LH)
1541 jit_extr_s(rt, rt);
1542 else if (c.i.op == OP_LW && __WORDSIZE == 64)
1543 jit_extr_i(rt, rt);
1544 }
1545
1546 lightrec_free_reg(reg_cache, rs);
1547 lightrec_free_reg(reg_cache, rt);
1548}
1549
1550static void rec_load_ram(struct lightrec_cstate *cstate,
1551 const struct block *block, u16 offset,
1552 jit_code_t code, jit_code_t swap_code, bool is_unsigned)
1553{
1554 _jit_note(block->_jit, __FILE__, __LINE__);
1555
1556 rec_load_memory(cstate, block, offset, code, swap_code, is_unsigned,
1557 cstate->state->offset_ram, rec_ram_mask(cstate->state));
1558}
1559
1560static void rec_load_bios(struct lightrec_cstate *cstate,
1561 const struct block *block, u16 offset,
1562 jit_code_t code, jit_code_t swap_code, bool is_unsigned)
1563{
1564 _jit_note(block->_jit, __FILE__, __LINE__);
1565
1566 rec_load_memory(cstate, block, offset, code, swap_code, is_unsigned,
1567 cstate->state->offset_bios, 0x1fffffff);
1568}
1569
1570static void rec_load_scratch(struct lightrec_cstate *cstate,
1571 const struct block *block, u16 offset,
1572 jit_code_t code, jit_code_t swap_code, bool is_unsigned)
1573{
1574 _jit_note(block->_jit, __FILE__, __LINE__);
1575
1576 rec_load_memory(cstate, block, offset, code, swap_code, is_unsigned,
1577 cstate->state->offset_scratch, 0x1fffffff);
1578}
1579
1580static void rec_load_io(struct lightrec_cstate *cstate,
1581 const struct block *block, u16 offset,
1582 jit_code_t code, jit_code_t swap_code, bool is_unsigned)
1583{
1584 _jit_note(block->_jit, __FILE__, __LINE__);
1585
1586 rec_load_memory(cstate, block, offset, code, swap_code, is_unsigned,
1587 cstate->state->offset_io, rec_io_mask(cstate->state));
1588}
1589
1590static void rec_load_direct(struct lightrec_cstate *cstate,
1591 const struct block *block, u16 offset,
1592 jit_code_t code, jit_code_t swap_code,
1593 bool is_unsigned)
1594{
1595 struct lightrec_state *state = cstate->state;
1596 struct regcache *reg_cache = cstate->reg_cache;
1597 union code c = block->opcode_list[offset].c;
1598 jit_state_t *_jit = block->_jit;
1599 jit_node_t *to_not_ram, *to_not_bios, *to_end, *to_end2;
1600 u8 tmp, rs, rt, addr_reg, flags = REG_EXT;
1601 s16 imm;
1602
1603 if (!c.i.rt)
1604 return;
1605
1606 if (is_unsigned)
1607 flags |= REG_ZEXT;
1608
1609 jit_note(__FILE__, __LINE__);
1610 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
1611 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, flags);
1612
1613 if ((state->offset_ram == state->offset_bios &&
1614 state->offset_ram == state->offset_scratch &&
1615 state->mirrors_mapped) || !c.i.imm) {
1616 addr_reg = rs;
1617 imm = (s16)c.i.imm;
1618 } else {
1619 jit_addi(rt, rs, (s16)c.i.imm);
1620 addr_reg = rt;
1621 imm = 0;
1622
1623 if (c.i.rs != c.i.rt)
1624 lightrec_free_reg(reg_cache, rs);
1625 }
1626
1627 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1628
1629 if (state->offset_ram == state->offset_bios &&
1630 state->offset_ram == state->offset_scratch) {
1631 if (!state->mirrors_mapped) {
1632 jit_andi(tmp, addr_reg, BIT(28));
1633 jit_rshi_u(tmp, tmp, 28 - 22);
1634 jit_ori(tmp, tmp, 0x1f800000 | (RAM_SIZE - 1));
1635 jit_andr(rt, addr_reg, tmp);
1636 } else {
1637 jit_andi(rt, addr_reg, 0x1fffffff);
1638 }
1639
1640 if (state->offset_ram)
1641 jit_movi(tmp, state->offset_ram);
1642 } else {
1643 to_not_ram = jit_bmsi(addr_reg, BIT(28));
1644
1645 /* Convert to KUNSEG and avoid RAM mirrors */
1646 jit_andi(rt, addr_reg, RAM_SIZE - 1);
1647
1648 if (state->offset_ram)
1649 jit_movi(tmp, state->offset_ram);
1650
1651 to_end = jit_b();
1652
1653 jit_patch(to_not_ram);
1654
1655 if (state->offset_bios != state->offset_scratch)
1656 to_not_bios = jit_bmci(addr_reg, BIT(22));
1657
1658 /* Convert to KUNSEG */
1659 jit_andi(rt, addr_reg, 0x1fc00000 | (BIOS_SIZE - 1));
1660
1661 jit_movi(tmp, state->offset_bios);
1662
1663 if (state->offset_bios != state->offset_scratch) {
1664 to_end2 = jit_b();
1665
1666 jit_patch(to_not_bios);
1667
1668 /* Convert to KUNSEG */
1669 jit_andi(rt, addr_reg, 0x1f800fff);
1670
1671 if (state->offset_scratch)
1672 jit_movi(tmp, state->offset_scratch);
1673
1674 jit_patch(to_end2);
1675 }
1676
1677 jit_patch(to_end);
1678 }
1679
1680 if (state->offset_ram || state->offset_bios || state->offset_scratch)
1681 jit_addr(rt, rt, tmp);
1682
1683 jit_new_node_www(code, rt, rt, imm);
1684
1685 if (is_big_endian() && swap_code) {
1686 jit_new_node_ww(swap_code, rt, rt);
1687
1688 if (c.i.op == OP_LH)
1689 jit_extr_s(rt, rt);
1690 else if (c.i.op == OP_LW && __WORDSIZE == 64)
1691 jit_extr_i(rt, rt);
1692 }
1693
1694 lightrec_free_reg(reg_cache, addr_reg);
1695 lightrec_free_reg(reg_cache, rt);
1696 lightrec_free_reg(reg_cache, tmp);
1697}
1698
1699static void rec_load(struct lightrec_cstate *state, const struct block *block,
1700 u16 offset, jit_code_t code, jit_code_t swap_code,
1701 bool is_unsigned)
1702{
1703 u32 flags = block->opcode_list[offset].flags;
1704
1705 switch (LIGHTREC_FLAGS_GET_IO_MODE(flags)) {
1706 case LIGHTREC_IO_RAM:
1707 rec_load_ram(state, block, offset, code, swap_code, is_unsigned);
1708 break;
1709 case LIGHTREC_IO_BIOS:
1710 rec_load_bios(state, block, offset, code, swap_code, is_unsigned);
1711 break;
1712 case LIGHTREC_IO_SCRATCH:
1713 rec_load_scratch(state, block, offset, code, swap_code, is_unsigned);
1714 break;
1715 case LIGHTREC_IO_DIRECT_HW:
1716 rec_load_io(state, block, offset, code, swap_code, is_unsigned);
1717 break;
1718 case LIGHTREC_IO_DIRECT:
1719 rec_load_direct(state, block, offset, code, swap_code, is_unsigned);
1720 break;
1721 default:
1722 rec_io(state, block, offset, false, true);
1723 break;
1724 }
1725}
1726
1727static void rec_LB(struct lightrec_cstate *state, const struct block *block, u16 offset)
1728{
1729 _jit_name(block->_jit, __func__);
1730 rec_load(state, block, offset, jit_code_ldxi_c, 0, false);
1731}
1732
1733static void rec_LBU(struct lightrec_cstate *state, const struct block *block, u16 offset)
1734{
1735 _jit_name(block->_jit, __func__);
1736 rec_load(state, block, offset, jit_code_ldxi_uc, 0, true);
1737}
1738
1739static void rec_LH(struct lightrec_cstate *state, const struct block *block, u16 offset)
1740{
1741 jit_code_t code = is_big_endian() ? jit_code_ldxi_us : jit_code_ldxi_s;
1742
1743 _jit_name(block->_jit, __func__);
1744 rec_load(state, block, offset, code, jit_code_bswapr_us, false);
1745}
1746
1747static void rec_LHU(struct lightrec_cstate *state, const struct block *block, u16 offset)
1748{
1749 _jit_name(block->_jit, __func__);
1750 rec_load(state, block, offset, jit_code_ldxi_us, jit_code_bswapr_us, true);
1751}
1752
1753static void rec_LWL(struct lightrec_cstate *state, const struct block *block, u16 offset)
1754{
1755 _jit_name(block->_jit, __func__);
1756 rec_io(state, block, offset, true, true);
1757}
1758
1759static void rec_LWR(struct lightrec_cstate *state, const struct block *block, u16 offset)
1760{
1761 _jit_name(block->_jit, __func__);
1762 rec_io(state, block, offset, true, true);
1763}
1764
1765static void rec_LW(struct lightrec_cstate *state, const struct block *block, u16 offset)
1766{
1767 jit_code_t code;
1768
1769 if (is_big_endian() && __WORDSIZE == 64)
1770 code = jit_code_ldxi_ui;
1771 else
1772 code = jit_code_ldxi_i;
1773
1774 _jit_name(block->_jit, __func__);
1775 rec_load(state, block, offset, code, jit_code_bswapr_ui, false);
1776}
1777
1778static void rec_LWC2(struct lightrec_cstate *state, const struct block *block, u16 offset)
1779{
1780 _jit_name(block->_jit, __func__);
1781 rec_io(state, block, offset, false, false);
1782}
1783
1784static void rec_break_syscall(struct lightrec_cstate *state,
1785 const struct block *block, u16 offset,
1786 u32 exit_code)
1787{
1788 struct regcache *reg_cache = state->reg_cache;
1789 jit_state_t *_jit = block->_jit;
1790 u8 tmp;
1791
1792 _jit_note(block->_jit, __FILE__, __LINE__);
1793
1794 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1795
1796 jit_movi(tmp, exit_code);
1797 jit_stxi_i(offsetof(struct lightrec_state, exit_flags),
1798 LIGHTREC_REG_STATE, tmp);
1799
1800 lightrec_free_reg(reg_cache, tmp);
1801
1802 /* TODO: the return address should be "pc - 4" if we're a delay slot */
1803 lightrec_emit_end_of_block(state, block, offset, -1,
1804 get_ds_pc(block, offset, 0),
1805 31, 0, true);
1806}
1807
1808static void rec_special_SYSCALL(struct lightrec_cstate *state,
1809 const struct block *block, u16 offset)
1810{
1811 _jit_name(block->_jit, __func__);
1812 rec_break_syscall(state, block, offset, LIGHTREC_EXIT_SYSCALL);
1813}
1814
1815static void rec_special_BREAK(struct lightrec_cstate *state,
1816 const struct block *block, u16 offset)
1817{
1818 _jit_name(block->_jit, __func__);
1819 rec_break_syscall(state, block, offset, LIGHTREC_EXIT_BREAK);
1820}
1821
1822static void rec_mfc(struct lightrec_cstate *state, const struct block *block, u16 offset)
1823{
1824 struct regcache *reg_cache = state->reg_cache;
1825 union code c = block->opcode_list[offset].c;
1826 jit_state_t *_jit = block->_jit;
1827
1828 jit_note(__FILE__, __LINE__);
1829 lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rt, true);
1830
1831 call_to_c_wrapper(state, block, c.opcode, C_WRAPPER_MFC);
1832}
1833
1834static void rec_mtc(struct lightrec_cstate *state, const struct block *block, u16 offset)
1835{
1836 struct regcache *reg_cache = state->reg_cache;
1837 union code c = block->opcode_list[offset].c;
1838 jit_state_t *_jit = block->_jit;
1839
1840 jit_note(__FILE__, __LINE__);
1841 lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rs, false);
1842 lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rt, false);
1843
1844 call_to_c_wrapper(state, block, c.opcode, C_WRAPPER_MTC);
1845
1846 if (c.i.op == OP_CP0 &&
1847 !op_flag_no_ds(block->opcode_list[offset].flags) &&
1848 (c.r.rd == 12 || c.r.rd == 13))
1849 lightrec_emit_end_of_block(state, block, offset, -1,
1850 get_ds_pc(block, offset, 1),
1851 0, 0, true);
1852}
1853
1854static void
1855rec_mfc0(struct lightrec_cstate *state, const struct block *block, u16 offset)
1856{
1857 struct regcache *reg_cache = state->reg_cache;
1858 union code c = block->opcode_list[offset].c;
1859 jit_state_t *_jit = block->_jit;
1860 u8 rt;
1861
1862 jit_note(__FILE__, __LINE__);
1863
1864 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, REG_EXT);
1865
1866 jit_ldxi_i(rt, LIGHTREC_REG_STATE,
1867 offsetof(struct lightrec_state, regs.cp0[c.r.rd]));
1868
1869 lightrec_free_reg(reg_cache, rt);
1870}
1871
1872static bool block_in_bios(const struct lightrec_cstate *state,
1873 const struct block *block)
1874{
1875 const struct lightrec_mem_map *bios = &state->state->maps[PSX_MAP_BIOS];
1876 u32 pc = kunseg(block->pc);
1877
1878 return pc >= bios->pc && pc < bios->pc + bios->length;
1879}
1880
1881static void
1882rec_mtc0(struct lightrec_cstate *state, const struct block *block, u16 offset)
1883{
1884 struct regcache *reg_cache = state->reg_cache;
1885 const union code c = block->opcode_list[offset].c;
1886 jit_state_t *_jit = block->_jit;
1887 u8 rt, tmp = 0, tmp2, status;
1888
1889 jit_note(__FILE__, __LINE__);
1890
1891 switch(c.r.rd) {
1892 case 1:
1893 case 4:
1894 case 8:
1895 case 14:
1896 case 15:
1897 /* Those registers are read-only */
1898 return;
1899 default:
1900 break;
1901 }
1902
1903 if (block_in_bios(state, block) && c.r.rd == 12) {
1904 /* If we are running code from the BIOS, handle writes to the
1905 * Status register in C. BIOS code may toggle bit 16 which will
1906 * map/unmap the RAM, while game code cannot do that. */
1907 rec_mtc(state, block, offset);
1908 return;
1909 }
1910
1911 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rt, 0);
1912
1913 if (c.r.rd != 13) {
1914 jit_stxi_i(offsetof(struct lightrec_state, regs.cp0[c.r.rd]),
1915 LIGHTREC_REG_STATE, rt);
1916 }
1917
1918 if (c.r.rd == 12 || c.r.rd == 13) {
1919 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1920 jit_ldxi_i(tmp, LIGHTREC_REG_STATE,
1921 offsetof(struct lightrec_state, regs.cp0[13]));
1922
1923 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
1924 }
1925
1926 if (c.r.rd == 12) {
1927 status = rt;
1928 } else if (c.r.rd == 13) {
1929 /* Cause = (Cause & ~0x0300) | (value & 0x0300) */
1930 jit_andi(tmp2, rt, 0x0300);
1931 jit_ori(tmp, tmp, 0x0300);
1932 jit_xori(tmp, tmp, 0x0300);
1933 jit_orr(tmp, tmp, tmp2);
1934 jit_ldxi_i(tmp2, LIGHTREC_REG_STATE,
1935 offsetof(struct lightrec_state, regs.cp0[12]));
1936 jit_stxi_i(offsetof(struct lightrec_state, regs.cp0[13]),
1937 LIGHTREC_REG_STATE, tmp);
1938 status = tmp2;
1939 }
1940
1941 if (c.r.rd == 12 || c.r.rd == 13) {
1942 /* Exit dynarec in case there's a software interrupt.
1943 * exit_flags = !!(status & tmp & 0x0300) & status; */
1944 jit_andr(tmp, tmp, status);
1945 jit_andi(tmp, tmp, 0x0300);
1946 jit_nei(tmp, tmp, 0);
1947 jit_andr(tmp, tmp, status);
1948 }
1949
1950 if (c.r.rd == 12) {
1951 /* Exit dynarec in case we unmask a hardware interrupt.
1952 * exit_flags = !(~status & 0x401) */
1953
1954 jit_comr(tmp2, status);
1955 jit_andi(tmp2, tmp2, 0x401);
1956 jit_eqi(tmp2, tmp2, 0);
1957 jit_orr(tmp, tmp, tmp2);
1958 }
1959
1960 if (c.r.rd == 12 || c.r.rd == 13) {
1961 jit_stxi_i(offsetof(struct lightrec_state, exit_flags),
1962 LIGHTREC_REG_STATE, tmp);
1963
1964 lightrec_free_reg(reg_cache, tmp);
1965 lightrec_free_reg(reg_cache, tmp2);
1966 }
1967
1968 lightrec_free_reg(reg_cache, rt);
1969
1970 if (!op_flag_no_ds(block->opcode_list[offset].flags) &&
1971 (c.r.rd == 12 || c.r.rd == 13)) {
1972 state->cycles += lightrec_cycles_of_opcode(c);
1973 lightrec_emit_eob(state, block, offset + 1);
1974 }
1975}
1976
1977static void rec_cp0_MFC0(struct lightrec_cstate *state,
1978 const struct block *block, u16 offset)
1979{
1980 _jit_name(block->_jit, __func__);
1981 rec_mfc0(state, block, offset);
1982}
1983
1984static void rec_cp0_CFC0(struct lightrec_cstate *state,
1985 const struct block *block, u16 offset)
1986{
1987 _jit_name(block->_jit, __func__);
1988 rec_mfc0(state, block, offset);
1989}
1990
1991static void rec_cp0_MTC0(struct lightrec_cstate *state,
1992 const struct block *block, u16 offset)
1993{
1994 _jit_name(block->_jit, __func__);
1995 rec_mtc0(state, block, offset);
1996}
1997
1998static void rec_cp0_CTC0(struct lightrec_cstate *state,
1999 const struct block *block, u16 offset)
2000{
2001 _jit_name(block->_jit, __func__);
2002 rec_mtc0(state, block, offset);
2003}
2004
2005static unsigned int cp2d_i_offset(u8 reg)
2006{
2007 return offsetof(struct lightrec_state, regs.cp2d[reg]);
2008}
2009
2010static unsigned int cp2d_s_offset(u8 reg)
2011{
2012 return cp2d_i_offset(reg) + is_big_endian() * 2;
2013}
2014
2015static unsigned int cp2c_i_offset(u8 reg)
2016{
2017 return offsetof(struct lightrec_state, regs.cp2c[reg]);
2018}
2019
2020static unsigned int cp2c_s_offset(u8 reg)
2021{
2022 return cp2c_i_offset(reg) + is_big_endian() * 2;
2023}
2024
2025static void rec_cp2_basic_MFC2(struct lightrec_cstate *state,
2026 const struct block *block, u16 offset)
2027{
2028 struct regcache *reg_cache = state->reg_cache;
2029 const union code c = block->opcode_list[offset].c;
2030 jit_state_t *_jit = block->_jit;
2031 const u32 zext_regs = 0x300f0080;
2032 u8 rt, tmp, tmp2, tmp3, out, flags;
2033 u8 reg = c.r.rd == 15 ? 14 : c.r.rd;
2034 unsigned int i;
2035
2036 _jit_name(block->_jit, __func__);
2037
2038 if (state->state->ops.cop2_notify) {
2039 /* We must call cop2_notify, handle that in C. */
2040 rec_mfc(state, block, offset);
2041 return;
2042 }
2043
2044 flags = (zext_regs & BIT(reg)) ? REG_ZEXT : REG_EXT;
2045 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rt, flags);
2046
2047 switch (reg) {
2048 case 1:
2049 case 3:
2050 case 5:
2051 case 8:
2052 case 9:
2053 case 10:
2054 case 11:
2055 jit_ldxi_s(rt, LIGHTREC_REG_STATE, cp2d_s_offset(reg));
2056 break;
2057 case 7:
2058 case 16:
2059 case 17:
2060 case 18:
2061 case 19:
2062 jit_ldxi_us(rt, LIGHTREC_REG_STATE, cp2d_s_offset(reg));
2063 break;
2064 case 28:
2065 case 29:
2066 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2067 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
2068 tmp3 = lightrec_alloc_reg_temp(reg_cache, _jit);
2069
2070 for (i = 0; i < 3; i++) {
2071 out = i == 0 ? rt : tmp;
2072
2073 jit_ldxi_s(tmp, LIGHTREC_REG_STATE, cp2d_s_offset(9 + i));
2074 jit_movi(tmp2, 0x1f);
2075 jit_rshi(out, tmp, 7);
2076
2077 jit_ltr(tmp3, tmp2, out);
2078 jit_movnr(out, tmp2, tmp3);
2079
2080 jit_gei(tmp2, out, 0);
2081 jit_movzr(out, tmp2, tmp2);
2082
2083 if (i > 0) {
2084 jit_lshi(tmp, tmp, 5 * i);
2085 jit_orr(rt, rt, tmp);
2086 }
2087 }
2088
2089
2090 lightrec_free_reg(reg_cache, tmp);
2091 lightrec_free_reg(reg_cache, tmp2);
2092 lightrec_free_reg(reg_cache, tmp3);
2093 break;
2094 default:
2095 jit_ldxi_i(rt, LIGHTREC_REG_STATE, cp2d_i_offset(reg));
2096 break;
2097 }
2098
2099 lightrec_free_reg(reg_cache, rt);
2100}
2101
2102static void rec_cp2_basic_CFC2(struct lightrec_cstate *state,
2103 const struct block *block, u16 offset)
2104{
2105 struct regcache *reg_cache = state->reg_cache;
2106 const union code c = block->opcode_list[offset].c;
2107 jit_state_t *_jit = block->_jit;
2108 u8 rt;
2109
2110 _jit_name(block->_jit, __func__);
2111
2112 if (state->state->ops.cop2_notify) {
2113 /* We must call cop2_notify, handle that in C. */
2114 rec_mfc(state, block, offset);
2115 return;
2116 }
2117
2118 switch (c.r.rd) {
2119 case 4:
2120 case 12:
2121 case 20:
2122 case 26:
2123 case 27:
2124 case 29:
2125 case 30:
2126 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rt, REG_EXT);
2127 jit_ldxi_s(rt, LIGHTREC_REG_STATE, cp2c_s_offset(c.r.rd));
2128 break;
2129 default:
2130 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rt, REG_ZEXT);
2131 jit_ldxi_i(rt, LIGHTREC_REG_STATE, cp2c_i_offset(c.r.rd));
2132 break;
2133 }
2134
2135 lightrec_free_reg(reg_cache, rt);
2136}
2137
2138static void rec_cp2_basic_MTC2(struct lightrec_cstate *state,
2139 const struct block *block, u16 offset)
2140{
2141 struct regcache *reg_cache = state->reg_cache;
2142 const union code c = block->opcode_list[offset].c;
2143 jit_state_t *_jit = block->_jit;
2144 jit_node_t *loop, *to_loop;
2145 u8 rt, tmp, tmp2, flags = 0;
2146
2147 _jit_name(block->_jit, __func__);
2148
2149 if (state->state->ops.cop2_notify) {
2150 /* We must call cop2_notify, handle that in C. */
2151 rec_mtc(state, block, offset);
2152 return;
2153 }
2154
2155 if (c.r.rd == 31)
2156 return;
2157
2158 if (c.r.rd == 30)
2159 flags |= REG_EXT;
2160
2161 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, flags);
2162
2163 switch (c.r.rd) {
2164 case 15:
2165 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2166 jit_ldxi_i(tmp, LIGHTREC_REG_STATE, cp2d_i_offset(13));
2167
2168 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
2169 jit_ldxi_i(tmp2, LIGHTREC_REG_STATE, cp2d_i_offset(14));
2170
2171 jit_stxi_i(cp2d_i_offset(12), LIGHTREC_REG_STATE, tmp);
2172 jit_stxi_i(cp2d_i_offset(13), LIGHTREC_REG_STATE, tmp2);
2173 jit_stxi_i(cp2d_i_offset(14), LIGHTREC_REG_STATE, rt);
2174
2175 lightrec_free_reg(reg_cache, tmp);
2176 lightrec_free_reg(reg_cache, tmp2);
2177 break;
2178 case 28:
2179 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2180
2181 jit_lshi(tmp, rt, 7);
2182 jit_andi(tmp, tmp, 0xf80);
2183 jit_stxi_s(cp2d_s_offset(9), LIGHTREC_REG_STATE, tmp);
2184
2185 jit_lshi(tmp, rt, 2);
2186 jit_andi(tmp, tmp, 0xf80);
2187 jit_stxi_s(cp2d_s_offset(10), LIGHTREC_REG_STATE, tmp);
2188
2189 jit_rshi(tmp, rt, 3);
2190 jit_andi(tmp, tmp, 0xf80);
2191 jit_stxi_s(cp2d_s_offset(11), LIGHTREC_REG_STATE, tmp);
2192
2193 lightrec_free_reg(reg_cache, tmp);
2194 break;
2195 case 30:
2196 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2197 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
2198
2199 /* if (rt < 0) rt = ~rt; */
2200 jit_rshi(tmp, rt, 31);
2201 jit_xorr(tmp, rt, tmp);
2202
2203 /* We know the sign bit is 0. Left-shift by 1 to start the algorithm */
2204 jit_lshi(tmp, tmp, 1);
2205 jit_movi(tmp2, 33);
2206
2207 /* Decrement tmp2 and right-shift the value by 1 until it equals zero */
2208 loop = jit_label();
2209 jit_subi(tmp2, tmp2, 1);
2210 jit_rshi_u(tmp, tmp, 1);
2211 to_loop = jit_bnei(tmp, 0);
2212
2213 jit_patch_at(to_loop, loop);
2214
2215 jit_stxi_i(cp2d_i_offset(31), LIGHTREC_REG_STATE, tmp2);
2216 jit_stxi_i(cp2d_i_offset(30), LIGHTREC_REG_STATE, rt);
2217
2218 lightrec_free_reg(reg_cache, tmp);
2219 lightrec_free_reg(reg_cache, tmp2);
2220 break;
2221 default:
2222 jit_stxi_i(cp2d_i_offset(c.r.rd), LIGHTREC_REG_STATE, rt);
2223 break;
2224 }
2225
2226 lightrec_free_reg(reg_cache, rt);
2227}
2228
2229static void rec_cp2_basic_CTC2(struct lightrec_cstate *state,
2230 const struct block *block, u16 offset)
2231{
2232 struct regcache *reg_cache = state->reg_cache;
2233 const union code c = block->opcode_list[offset].c;
2234 jit_state_t *_jit = block->_jit;
2235 u8 rt, tmp, tmp2;
2236
2237 _jit_name(block->_jit, __func__);
2238
2239 if (state->state->ops.cop2_notify) {
2240 /* We must call cop2_notify, handle that in C. */
2241 rec_mtc(state, block, offset);
2242 return;
2243 }
2244
2245 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, 0);
2246
2247 switch (c.r.rd) {
2248 case 4:
2249 case 12:
2250 case 20:
2251 case 26:
2252 case 27:
2253 case 29:
2254 case 30:
2255 jit_stxi_s(cp2c_s_offset(c.r.rd), LIGHTREC_REG_STATE, rt);
2256 break;
2257 case 31:
2258 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2259 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
2260
2261 jit_andi(tmp, rt, 0x7f87e000);
2262 jit_nei(tmp, tmp, 0);
2263 jit_lshi(tmp, tmp, 31);
2264
2265 jit_andi(tmp2, rt, 0x7ffff000);
2266 jit_orr(tmp, tmp2, tmp);
2267
2268 jit_stxi_i(cp2c_i_offset(31), LIGHTREC_REG_STATE, tmp);
2269
2270 lightrec_free_reg(reg_cache, tmp);
2271 lightrec_free_reg(reg_cache, tmp2);
2272 break;
2273
2274 default:
2275 jit_stxi_i(cp2c_i_offset(c.r.rd), LIGHTREC_REG_STATE, rt);
2276 }
2277
2278 lightrec_free_reg(reg_cache, rt);
2279}
2280
2281static void rec_cp0_RFE(struct lightrec_cstate *state,
2282 const struct block *block, u16 offset)
2283{
2284 struct regcache *reg_cache = state->reg_cache;
2285 jit_state_t *_jit = block->_jit;
2286 u8 status, tmp;
2287
2288 jit_name(__func__);
2289 jit_note(__FILE__, __LINE__);
2290
2291 status = lightrec_alloc_reg_temp(reg_cache, _jit);
2292 jit_ldxi_i(status, LIGHTREC_REG_STATE,
2293 offsetof(struct lightrec_state, regs.cp0[12]));
2294
2295 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2296
2297 /* status = ((status >> 2) & 0xf) | status & ~0xf; */
2298 jit_rshi(tmp, status, 2);
2299 jit_andi(tmp, tmp, 0xf);
2300 jit_andi(status, status, ~0xful);
2301 jit_orr(status, status, tmp);
2302
2303 jit_ldxi_i(tmp, LIGHTREC_REG_STATE,
2304 offsetof(struct lightrec_state, regs.cp0[13]));
2305 jit_stxi_i(offsetof(struct lightrec_state, regs.cp0[12]),
2306 LIGHTREC_REG_STATE, status);
2307
2308 /* Exit dynarec in case there's a software interrupt.
2309 * exit_flags = !!(status & cause & 0x0300) & status; */
2310 jit_andr(tmp, tmp, status);
2311 jit_andi(tmp, tmp, 0x0300);
2312 jit_nei(tmp, tmp, 0);
2313 jit_andr(tmp, tmp, status);
2314 jit_stxi_i(offsetof(struct lightrec_state, exit_flags),
2315 LIGHTREC_REG_STATE, tmp);
2316
2317 lightrec_free_reg(reg_cache, status);
2318 lightrec_free_reg(reg_cache, tmp);
2319}
2320
2321static void rec_CP(struct lightrec_cstate *state,
2322 const struct block *block, u16 offset)
2323{
2324 union code c = block->opcode_list[offset].c;
2325 jit_state_t *_jit = block->_jit;
2326
2327 jit_name(__func__);
2328 jit_note(__FILE__, __LINE__);
2329
2330 call_to_c_wrapper(state, block, c.opcode, C_WRAPPER_CP);
2331}
2332
2333static void rec_meta_MOV(struct lightrec_cstate *state,
2334 const struct block *block, u16 offset)
2335{
2336 struct regcache *reg_cache = state->reg_cache;
2337 union code c = block->opcode_list[offset].c;
2338 jit_state_t *_jit = block->_jit;
2339 u8 rs, rd;
2340
2341 _jit_name(block->_jit, __func__);
2342 jit_note(__FILE__, __LINE__);
2343 if (c.r.rs)
2344 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, 0);
2345 rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd, REG_EXT);
2346
2347 if (c.r.rs == 0)
2348 jit_movi(rd, 0);
2349 else
2350 jit_extr_i(rd, rs);
2351
2352 if (c.r.rs)
2353 lightrec_free_reg(reg_cache, rs);
2354 lightrec_free_reg(reg_cache, rd);
2355}
2356
2357static void rec_meta_EXTC_EXTS(struct lightrec_cstate *state,
2358 const struct block *block,
2359 u16 offset)
2360{
2361 struct regcache *reg_cache = state->reg_cache;
2362 union code c = block->opcode_list[offset].c;
2363 jit_state_t *_jit = block->_jit;
2364 u8 rs, rt;
2365
2366 _jit_name(block->_jit, __func__);
2367 jit_note(__FILE__, __LINE__);
2368
2369 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
2370 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, REG_EXT);
2371
2372 if (c.i.op == OP_META_EXTC)
2373 jit_extr_c(rt, rs);
2374 else
2375 jit_extr_s(rt, rs);
2376
2377 lightrec_free_reg(reg_cache, rs);
2378 lightrec_free_reg(reg_cache, rt);
2379}
2380
2381static void rec_meta_MULT2(struct lightrec_cstate *state,
2382 const struct block *block,
2383 u16 offset)
2384{
2385 struct regcache *reg_cache = state->reg_cache;
2386 union code c = block->opcode_list[offset].c;
2387 jit_state_t *_jit = block->_jit;
2388 u8 reg_lo = get_mult_div_lo(c);
2389 u8 reg_hi = get_mult_div_hi(c);
2390 u32 flags = block->opcode_list[offset].flags;
2391 bool is_signed = c.i.op == OP_META_MULT2;
2392 u8 rs, lo, hi, rflags = 0, hiflags = 0;
2393
2394 if (!op_flag_no_hi(flags) && c.r.op < 32) {
2395 rflags = is_signed ? REG_EXT : REG_ZEXT;
2396 hiflags = is_signed ? REG_EXT : (REG_EXT | REG_ZEXT);
2397 }
2398
2399 _jit_name(block->_jit, __func__);
2400 jit_note(__FILE__, __LINE__);
2401
2402 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, rflags);
2403
2404 if (!op_flag_no_lo(flags)) {
2405 lo = lightrec_alloc_reg_out(reg_cache, _jit, reg_lo, 0);
2406
2407 if (c.r.op < 32)
2408 jit_lshi(lo, rs, c.r.op);
2409 else
2410 jit_movi(lo, 0);
2411
2412 lightrec_free_reg(reg_cache, lo);
2413 }
2414
2415 if (!op_flag_no_hi(flags)) {
2416 hi = lightrec_alloc_reg_out(reg_cache, _jit, reg_hi, hiflags);
2417
2418 if (c.r.op >= 32)
2419 jit_lshi(hi, rs, c.r.op - 32);
2420 else if (is_signed)
2421 jit_rshi(hi, rs, 32 - c.r.op);
2422 else
2423 jit_rshi_u(hi, rs, 32 - c.r.op);
2424
2425 lightrec_free_reg(reg_cache, hi);
2426 }
2427
2428 lightrec_free_reg(reg_cache, rs);
2429
2430 _jit_name(block->_jit, __func__);
2431 jit_note(__FILE__, __LINE__);
2432}
2433
2434static const lightrec_rec_func_t rec_standard[64] = {
2435 SET_DEFAULT_ELM(rec_standard, unknown_opcode),
2436 [OP_SPECIAL] = rec_SPECIAL,
2437 [OP_REGIMM] = rec_REGIMM,
2438 [OP_J] = rec_J,
2439 [OP_JAL] = rec_JAL,
2440 [OP_BEQ] = rec_BEQ,
2441 [OP_BNE] = rec_BNE,
2442 [OP_BLEZ] = rec_BLEZ,
2443 [OP_BGTZ] = rec_BGTZ,
2444 [OP_ADDI] = rec_ADDI,
2445 [OP_ADDIU] = rec_ADDIU,
2446 [OP_SLTI] = rec_SLTI,
2447 [OP_SLTIU] = rec_SLTIU,
2448 [OP_ANDI] = rec_ANDI,
2449 [OP_ORI] = rec_ORI,
2450 [OP_XORI] = rec_XORI,
2451 [OP_LUI] = rec_LUI,
2452 [OP_CP0] = rec_CP0,
2453 [OP_CP2] = rec_CP2,
2454 [OP_LB] = rec_LB,
2455 [OP_LH] = rec_LH,
2456 [OP_LWL] = rec_LWL,
2457 [OP_LW] = rec_LW,
2458 [OP_LBU] = rec_LBU,
2459 [OP_LHU] = rec_LHU,
2460 [OP_LWR] = rec_LWR,
2461 [OP_SB] = rec_SB,
2462 [OP_SH] = rec_SH,
2463 [OP_SWL] = rec_SWL,
2464 [OP_SW] = rec_SW,
2465 [OP_SWR] = rec_SWR,
2466 [OP_LWC2] = rec_LWC2,
2467 [OP_SWC2] = rec_SWC2,
2468
2469 [OP_META_MOV] = rec_meta_MOV,
2470 [OP_META_EXTC] = rec_meta_EXTC_EXTS,
2471 [OP_META_EXTS] = rec_meta_EXTC_EXTS,
2472 [OP_META_MULT2] = rec_meta_MULT2,
2473 [OP_META_MULTU2] = rec_meta_MULT2,
2474};
2475
2476static const lightrec_rec_func_t rec_special[64] = {
2477 SET_DEFAULT_ELM(rec_special, unknown_opcode),
2478 [OP_SPECIAL_SLL] = rec_special_SLL,
2479 [OP_SPECIAL_SRL] = rec_special_SRL,
2480 [OP_SPECIAL_SRA] = rec_special_SRA,
2481 [OP_SPECIAL_SLLV] = rec_special_SLLV,
2482 [OP_SPECIAL_SRLV] = rec_special_SRLV,
2483 [OP_SPECIAL_SRAV] = rec_special_SRAV,
2484 [OP_SPECIAL_JR] = rec_special_JR,
2485 [OP_SPECIAL_JALR] = rec_special_JALR,
2486 [OP_SPECIAL_SYSCALL] = rec_special_SYSCALL,
2487 [OP_SPECIAL_BREAK] = rec_special_BREAK,
2488 [OP_SPECIAL_MFHI] = rec_special_MFHI,
2489 [OP_SPECIAL_MTHI] = rec_special_MTHI,
2490 [OP_SPECIAL_MFLO] = rec_special_MFLO,
2491 [OP_SPECIAL_MTLO] = rec_special_MTLO,
2492 [OP_SPECIAL_MULT] = rec_special_MULT,
2493 [OP_SPECIAL_MULTU] = rec_special_MULTU,
2494 [OP_SPECIAL_DIV] = rec_special_DIV,
2495 [OP_SPECIAL_DIVU] = rec_special_DIVU,
2496 [OP_SPECIAL_ADD] = rec_special_ADD,
2497 [OP_SPECIAL_ADDU] = rec_special_ADDU,
2498 [OP_SPECIAL_SUB] = rec_special_SUB,
2499 [OP_SPECIAL_SUBU] = rec_special_SUBU,
2500 [OP_SPECIAL_AND] = rec_special_AND,
2501 [OP_SPECIAL_OR] = rec_special_OR,
2502 [OP_SPECIAL_XOR] = rec_special_XOR,
2503 [OP_SPECIAL_NOR] = rec_special_NOR,
2504 [OP_SPECIAL_SLT] = rec_special_SLT,
2505 [OP_SPECIAL_SLTU] = rec_special_SLTU,
2506};
2507
2508static const lightrec_rec_func_t rec_regimm[64] = {
2509 SET_DEFAULT_ELM(rec_regimm, unknown_opcode),
2510 [OP_REGIMM_BLTZ] = rec_regimm_BLTZ,
2511 [OP_REGIMM_BGEZ] = rec_regimm_BGEZ,
2512 [OP_REGIMM_BLTZAL] = rec_regimm_BLTZAL,
2513 [OP_REGIMM_BGEZAL] = rec_regimm_BGEZAL,
2514};
2515
2516static const lightrec_rec_func_t rec_cp0[64] = {
2517 SET_DEFAULT_ELM(rec_cp0, rec_CP),
2518 [OP_CP0_MFC0] = rec_cp0_MFC0,
2519 [OP_CP0_CFC0] = rec_cp0_CFC0,
2520 [OP_CP0_MTC0] = rec_cp0_MTC0,
2521 [OP_CP0_CTC0] = rec_cp0_CTC0,
2522 [OP_CP0_RFE] = rec_cp0_RFE,
2523};
2524
2525static const lightrec_rec_func_t rec_cp2_basic[64] = {
2526 SET_DEFAULT_ELM(rec_cp2_basic, rec_CP),
2527 [OP_CP2_BASIC_MFC2] = rec_cp2_basic_MFC2,
2528 [OP_CP2_BASIC_CFC2] = rec_cp2_basic_CFC2,
2529 [OP_CP2_BASIC_MTC2] = rec_cp2_basic_MTC2,
2530 [OP_CP2_BASIC_CTC2] = rec_cp2_basic_CTC2,
2531};
2532
2533static void rec_SPECIAL(struct lightrec_cstate *state,
2534 const struct block *block, u16 offset)
2535{
2536 union code c = block->opcode_list[offset].c;
2537 lightrec_rec_func_t f = rec_special[c.r.op];
2538
2539 if (!HAS_DEFAULT_ELM && unlikely(!f))
2540 unknown_opcode(state, block, offset);
2541 else
2542 (*f)(state, block, offset);
2543}
2544
2545static void rec_REGIMM(struct lightrec_cstate *state,
2546 const struct block *block, u16 offset)
2547{
2548 union code c = block->opcode_list[offset].c;
2549 lightrec_rec_func_t f = rec_regimm[c.r.rt];
2550
2551 if (!HAS_DEFAULT_ELM && unlikely(!f))
2552 unknown_opcode(state, block, offset);
2553 else
2554 (*f)(state, block, offset);
2555}
2556
2557static void rec_CP0(struct lightrec_cstate *state,
2558 const struct block *block, u16 offset)
2559{
2560 union code c = block->opcode_list[offset].c;
2561 lightrec_rec_func_t f = rec_cp0[c.r.rs];
2562
2563 if (!HAS_DEFAULT_ELM && unlikely(!f))
2564 rec_CP(state, block, offset);
2565 else
2566 (*f)(state, block, offset);
2567}
2568
2569static void rec_CP2(struct lightrec_cstate *state,
2570 const struct block *block, u16 offset)
2571{
2572 union code c = block->opcode_list[offset].c;
2573
2574 if (c.r.op == OP_CP2_BASIC) {
2575 lightrec_rec_func_t f = rec_cp2_basic[c.r.rs];
2576
2577 if (HAS_DEFAULT_ELM || likely(f)) {
2578 (*f)(state, block, offset);
2579 return;
2580 }
2581 }
2582
2583 rec_CP(state, block, offset);
2584}
2585
2586void lightrec_rec_opcode(struct lightrec_cstate *state,
2587 const struct block *block, u16 offset)
2588{
2589 struct regcache *reg_cache = state->reg_cache;
2590 struct lightrec_branch_target *target;
2591 const struct opcode *op = &block->opcode_list[offset];
2592 jit_state_t *_jit = block->_jit;
2593 lightrec_rec_func_t f;
2594 u16 unload_offset;
2595
2596 if (op_flag_sync(op->flags)) {
2597 if (state->cycles)
2598 jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, state->cycles);
2599 state->cycles = 0;
2600
2601 lightrec_storeback_regs(reg_cache, _jit);
2602 lightrec_regcache_reset(reg_cache);
2603
2604 pr_debug("Adding branch target at offset 0x%x\n", offset << 2);
2605 target = &state->targets[state->nb_targets++];
2606 target->offset = offset;
2607 target->label = jit_indirect();
2608 }
2609
2610 if (likely(op->opcode)) {
2611 f = rec_standard[op->i.op];
2612
2613 if (!HAS_DEFAULT_ELM && unlikely(!f))
2614 unknown_opcode(state, block, offset);
2615 else
2616 (*f)(state, block, offset);
2617 }
2618
2619 if (OPT_EARLY_UNLOAD) {
2620 unload_offset = offset +
2621 (has_delay_slot(op->c) && !op_flag_no_ds(op->flags));
2622
2623 lightrec_do_early_unload(state, block, unload_offset);
2624 }
2625}
ARM optimized PCSX fork