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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
17#define LIGHTNING_UNALIGNED_32BIT 4
18
19typedef void (*lightrec_rec_func_t)(struct lightrec_cstate *, const struct block *, u16);
20
21/* Forward declarations */
22static void rec_SPECIAL(struct lightrec_cstate *state, const struct block *block, u16 offset);
23static void rec_REGIMM(struct lightrec_cstate *state, const struct block *block, u16 offset);
24static void rec_CP0(struct lightrec_cstate *state, const struct block *block, u16 offset);
25static void rec_CP2(struct lightrec_cstate *state, const struct block *block, u16 offset);
26static void rec_META(struct lightrec_cstate *state, const struct block *block, u16 offset);
27static void rec_cp2_do_mtc2(struct lightrec_cstate *state,
28 const struct block *block, u16 offset, u8 reg, u8 in_reg);
29static void rec_cp2_do_mfc2(struct lightrec_cstate *state,
30 const struct block *block, u16 offset,
31 u8 reg, u8 out_reg);
32
33static void
34lightrec_jump_to_fn(jit_state_t *_jit, void (*fn)(void))
35{
36 /* Prevent jit_jmpi() from using our cycles register as a temporary */
37 jit_live(LIGHTREC_REG_CYCLE);
38
39 jit_patch_abs(jit_jmpi(), fn);
40}
41
42static void
43lightrec_jump_to_eob(struct lightrec_cstate *state, jit_state_t *_jit)
44{
45 lightrec_jump_to_fn(_jit, state->state->eob_wrapper_func);
46}
47
48static void
49lightrec_jump_to_ds_check(struct lightrec_cstate *state, jit_state_t *_jit)
50{
51 lightrec_jump_to_fn(_jit, state->state->ds_check_func);
52}
53
54static void update_ra_register(struct regcache *reg_cache, jit_state_t *_jit,
55 u8 ra_reg, u32 pc, u32 link)
56{
57 u8 link_reg;
58
59 link_reg = lightrec_alloc_reg_out(reg_cache, _jit, ra_reg, 0);
60 lightrec_load_imm(reg_cache, _jit, link_reg, pc, link);
61 lightrec_free_reg(reg_cache, link_reg);
62}
63
64static void lightrec_emit_end_of_block(struct lightrec_cstate *state,
65 const struct block *block, u16 offset,
66 s8 reg_new_pc, u32 imm, u8 ra_reg,
67 u32 link, bool update_cycles)
68{
69 struct regcache *reg_cache = state->reg_cache;
70 jit_state_t *_jit = block->_jit;
71 const struct opcode *op = &block->opcode_list[offset],
72 *ds = get_delay_slot(block->opcode_list, offset);
73 u32 cycles = state->cycles + lightrec_cycles_of_opcode(state->state, op->c);
74 bool has_ds = has_delay_slot(op->c);
75
76 jit_note(__FILE__, __LINE__);
77
78 if (link && ra_reg != reg_new_pc)
79 update_ra_register(reg_cache, _jit, ra_reg, block->pc, link);
80
81 if (reg_new_pc < 0)
82 lightrec_load_next_pc_imm(reg_cache, _jit, block->pc, imm);
83 else
84 lightrec_load_next_pc(reg_cache, _jit, reg_new_pc);
85
86 if (link && ra_reg == reg_new_pc) {
87 /* Handle the special case: JALR $r0, $r0
88 * In that case the target PC should be the old value of the
89 * register. */
90 update_ra_register(reg_cache, _jit, ra_reg, block->pc, link);
91 }
92
93 if (has_ds && !op_flag_no_ds(op->flags) && !op_flag_local_branch(op->flags)) {
94 cycles += lightrec_cycles_of_opcode(state->state, ds->c);
95
96 /* Recompile the delay slot */
97 if (ds->c.opcode)
98 lightrec_rec_opcode(state, block, offset + 1);
99 }
100
101 /* Clean the remaining registers */
102 lightrec_clean_regs(reg_cache, _jit);
103
104 if (cycles && update_cycles) {
105 jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, cycles);
106 pr_debug("EOB: %u cycles\n", cycles);
107 }
108
109 if (has_ds && op_flag_load_delay(ds->flags)
110 && opcode_has_load_delay(ds->c) && !state->no_load_delay) {
111 /* If the delay slot is a load opcode, its target register
112 * will be written after the first opcode of the target is
113 * executed. Handle this by jumping to a special section of
114 * the dispatcher. It expects the loaded value to be in
115 * REG_TEMP, and the target register number to be in JIT_V1.*/
116 jit_movi(JIT_V1, ds->c.i.rt);
117
118 lightrec_jump_to_ds_check(state, _jit);
119 } else {
120 lightrec_jump_to_eob(state, _jit);
121 }
122
123 lightrec_regcache_reset(reg_cache);
124}
125
126void lightrec_emit_jump_to_interpreter(struct lightrec_cstate *state,
127 const struct block *block, u16 offset)
128{
129 struct regcache *reg_cache = state->reg_cache;
130 jit_state_t *_jit = block->_jit;
131
132 lightrec_clean_regs(reg_cache, _jit);
133
134 /* Call the interpreter with the block's address in JIT_V1 and the
135 * PC (which might have an offset) in JIT_V0. */
136 lightrec_load_imm(reg_cache, _jit, JIT_V0, block->pc,
137 block->pc + (offset << 2));
138 if (lightrec_store_next_pc()) {
139 jit_stxi_i(lightrec_offset(next_pc), LIGHTREC_REG_STATE, JIT_V0);
140 }
141
142 jit_movi(JIT_V1, (uintptr_t)block);
143
144 jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, state->cycles);
145 lightrec_jump_to_fn(_jit, state->state->interpreter_func);
146}
147
148static void lightrec_emit_eob(struct lightrec_cstate *state,
149 const struct block *block, u16 offset)
150{
151 struct regcache *reg_cache = state->reg_cache;
152 jit_state_t *_jit = block->_jit;
153
154 lightrec_clean_regs(reg_cache, _jit);
155
156 lightrec_load_imm(reg_cache, _jit, JIT_V0, block->pc,
157 block->pc + (offset << 2));
158 if (lightrec_store_next_pc()) {
159 jit_stxi_i(lightrec_offset(next_pc), LIGHTREC_REG_STATE, JIT_V0);
160 }
161
162 jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, state->cycles);
163
164 lightrec_jump_to_eob(state, _jit);
165}
166
167static void rec_special_JR(struct lightrec_cstate *state, const struct block *block, u16 offset)
168{
169 union code c = block->opcode_list[offset].c;
170
171 _jit_name(block->_jit, __func__);
172 lightrec_emit_end_of_block(state, block, offset, c.r.rs, 0, 31, 0, true);
173}
174
175static void rec_special_JALR(struct lightrec_cstate *state, const struct block *block, u16 offset)
176{
177 union code c = block->opcode_list[offset].c;
178
179 _jit_name(block->_jit, __func__);
180 lightrec_emit_end_of_block(state, block, offset, c.r.rs, 0, c.r.rd,
181 get_branch_pc(block, offset, 2), true);
182}
183
184static void rec_J(struct lightrec_cstate *state, const struct block *block, u16 offset)
185{
186 union code c = block->opcode_list[offset].c;
187
188 _jit_name(block->_jit, __func__);
189 lightrec_emit_end_of_block(state, block, offset, -1,
190 (block->pc & 0xf0000000) | (c.j.imm << 2),
191 31, 0, true);
192}
193
194static void rec_JAL(struct lightrec_cstate *state, const struct block *block, u16 offset)
195{
196 union code c = block->opcode_list[offset].c;
197
198 _jit_name(block->_jit, __func__);
199 lightrec_emit_end_of_block(state, block, offset, -1,
200 (block->pc & 0xf0000000) | (c.j.imm << 2),
201 31, get_branch_pc(block, offset, 2), true);
202}
203
204static void lightrec_do_early_unload(struct lightrec_cstate *state,
205 const struct block *block, u16 offset)
206{
207 struct regcache *reg_cache = state->reg_cache;
208 const struct opcode *op = &block->opcode_list[offset];
209 jit_state_t *_jit = block->_jit;
210 unsigned int i;
211 u8 reg;
212 struct {
213 u8 reg, op;
214 } reg_ops[3] = {
215 { op->r.rd, LIGHTREC_FLAGS_GET_RD(op->flags), },
216 { op->i.rt, LIGHTREC_FLAGS_GET_RT(op->flags), },
217 { op->i.rs, LIGHTREC_FLAGS_GET_RS(op->flags), },
218 };
219
220 for (i = 0; i < ARRAY_SIZE(reg_ops); i++) {
221 reg = reg_ops[i].reg;
222
223 switch (reg_ops[i].op) {
224 case LIGHTREC_REG_UNLOAD:
225 lightrec_clean_reg_if_loaded(reg_cache, _jit, reg, true);
226 break;
227
228 case LIGHTREC_REG_DISCARD:
229 lightrec_discard_reg_if_loaded(reg_cache, reg);
230 break;
231
232 case LIGHTREC_REG_CLEAN:
233 lightrec_clean_reg_if_loaded(reg_cache, _jit, reg, false);
234 break;
235 default:
236 break;
237 };
238 }
239}
240
241static void rec_b(struct lightrec_cstate *state, const struct block *block, u16 offset,
242 jit_code_t code, jit_code_t code2, u32 link, bool unconditional, bool bz)
243{
244 struct regcache *reg_cache = state->reg_cache;
245 struct native_register *regs_backup;
246 jit_state_t *_jit = block->_jit;
247 struct lightrec_branch *branch;
248 const struct opcode *op = &block->opcode_list[offset],
249 *ds = get_delay_slot(block->opcode_list, offset);
250 jit_node_t *addr;
251 bool is_forward = (s16)op->i.imm >= 0;
252 int op_cycles = lightrec_cycles_of_opcode(state->state, op->c);
253 u32 target_offset, cycles = state->cycles + op_cycles;
254 bool no_indirection = false;
255 u32 next_pc;
256 u8 rs, rt;
257
258 jit_note(__FILE__, __LINE__);
259
260 if (!op_flag_no_ds(op->flags))
261 cycles += lightrec_cycles_of_opcode(state->state, ds->c);
262
263 state->cycles = -op_cycles;
264
265 if (!unconditional) {
266 rs = lightrec_alloc_reg_in(reg_cache, _jit, op->i.rs, REG_EXT);
267 rt = bz ? 0 : lightrec_alloc_reg_in(reg_cache,
268 _jit, op->i.rt, REG_EXT);
269
270 /* Unload dead registers before evaluating the branch */
271 if (OPT_EARLY_UNLOAD)
272 lightrec_do_early_unload(state, block, offset);
273
274 if (op_flag_local_branch(op->flags) &&
275 (op_flag_no_ds(op->flags) || !ds->opcode) &&
276 is_forward && !lightrec_has_dirty_regs(reg_cache))
277 no_indirection = true;
278
279 if (no_indirection)
280 pr_debug("Using no indirection for branch at offset 0x%hx\n", offset << 2);
281 }
282
283 if (cycles)
284 jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, cycles);
285
286 if (!unconditional) {
287 /* Generate the branch opcode */
288 if (!no_indirection)
289 addr = jit_new_node_pww(code, NULL, rs, rt);
290
291 lightrec_free_regs(reg_cache);
292 regs_backup = lightrec_regcache_enter_branch(reg_cache);
293 }
294
295 if (op_flag_local_branch(op->flags)) {
296 /* Recompile the delay slot */
297 if (!op_flag_no_ds(op->flags) && ds->opcode) {
298 /* Never handle load delays with local branches. */
299 state->no_load_delay = true;
300 lightrec_rec_opcode(state, block, offset + 1);
301 }
302
303 if (link)
304 update_ra_register(reg_cache, _jit, 31, block->pc, link);
305
306 /* Clean remaining registers */
307 lightrec_clean_regs(reg_cache, _jit);
308
309 target_offset = offset + 1 + (s16)op->i.imm
310 - !!op_flag_no_ds(op->flags);
311 pr_debug("Adding local branch to offset 0x%x\n",
312 target_offset << 2);
313 branch = &state->local_branches[
314 state->nb_local_branches++];
315
316 branch->target = target_offset;
317
318 if (no_indirection)
319 branch->branch = jit_new_node_pww(code2, NULL, rs, rt);
320 else if (is_forward)
321 branch->branch = jit_b();
322 else
323 branch->branch = jit_bgti(LIGHTREC_REG_CYCLE, 0);
324 }
325
326 if (!op_flag_local_branch(op->flags) || !is_forward) {
327 next_pc = get_branch_pc(block, offset, 1 + (s16)op->i.imm);
328 state->no_load_delay = op_flag_local_branch(op->flags);
329 lightrec_emit_end_of_block(state, block, offset, -1, next_pc,
330 31, link, false);
331 }
332
333 if (!unconditional) {
334 if (!no_indirection)
335 jit_patch(addr);
336
337 lightrec_regcache_leave_branch(reg_cache, regs_backup);
338
339 if (bz && link)
340 update_ra_register(reg_cache, _jit, 31, block->pc, link);
341
342 if (!op_flag_no_ds(op->flags) && ds->opcode) {
343 state->no_load_delay = true;
344 lightrec_rec_opcode(state, block, offset + 1);
345 }
346 }
347}
348
349static void rec_BNE(struct lightrec_cstate *state,
350 const struct block *block, u16 offset)
351{
352 union code c = block->opcode_list[offset].c;
353
354 _jit_name(block->_jit, __func__);
355
356 if (c.i.rt == 0)
357 rec_b(state, block, offset, jit_code_beqi, jit_code_bnei, 0, false, true);
358 else
359 rec_b(state, block, offset, jit_code_beqr, jit_code_bner, 0, false, false);
360}
361
362static void rec_BEQ(struct lightrec_cstate *state,
363 const struct block *block, u16 offset)
364{
365 union code c = block->opcode_list[offset].c;
366
367 _jit_name(block->_jit, __func__);
368
369 if (c.i.rt == 0)
370 rec_b(state, block, offset, jit_code_bnei, jit_code_beqi, 0, c.i.rs == 0, true);
371 else
372 rec_b(state, block, offset, jit_code_bner, jit_code_beqr, 0, c.i.rs == c.i.rt, false);
373}
374
375static void rec_BLEZ(struct lightrec_cstate *state,
376 const struct block *block, u16 offset)
377{
378 union code c = block->opcode_list[offset].c;
379
380 _jit_name(block->_jit, __func__);
381 rec_b(state, block, offset, jit_code_bgti, jit_code_blei, 0, c.i.rs == 0, true);
382}
383
384static void rec_BGTZ(struct lightrec_cstate *state,
385 const struct block *block, u16 offset)
386{
387 _jit_name(block->_jit, __func__);
388 rec_b(state, block, offset, jit_code_blei, jit_code_bgti, 0, false, true);
389}
390
391static void rec_regimm_BLTZ(struct lightrec_cstate *state,
392 const struct block *block, u16 offset)
393{
394 _jit_name(block->_jit, __func__);
395 rec_b(state, block, offset, jit_code_bgei, jit_code_blti, 0, false, true);
396}
397
398static void rec_regimm_BLTZAL(struct lightrec_cstate *state,
399 const struct block *block, u16 offset)
400{
401 _jit_name(block->_jit, __func__);
402 rec_b(state, block, offset, jit_code_bgei, jit_code_blti,
403 get_branch_pc(block, offset, 2), false, true);
404}
405
406static void rec_regimm_BGEZ(struct lightrec_cstate *state,
407 const struct block *block, u16 offset)
408{
409 union code c = block->opcode_list[offset].c;
410
411 _jit_name(block->_jit, __func__);
412 rec_b(state, block, offset, jit_code_blti, jit_code_bgei, 0, !c.i.rs, true);
413}
414
415static void rec_regimm_BGEZAL(struct lightrec_cstate *state,
416 const struct block *block, u16 offset)
417{
418 const struct opcode *op = &block->opcode_list[offset];
419 _jit_name(block->_jit, __func__);
420 rec_b(state, block, offset, jit_code_blti, jit_code_bgei,
421 get_branch_pc(block, offset, 2),
422 !op->i.rs, true);
423}
424
425static void rec_alloc_rs_rd(struct regcache *reg_cache,
426 jit_state_t *_jit,
427 const struct opcode *op,
428 u8 rs, u8 rd,
429 u8 in_flags, u8 out_flags,
430 u8 *rs_out, u8 *rd_out)
431{
432 bool unload, discard;
433 u32 unload_flags;
434
435 if (OPT_EARLY_UNLOAD) {
436 unload_flags = LIGHTREC_FLAGS_GET_RS(op->flags);
437 unload = unload_flags == LIGHTREC_REG_UNLOAD;
438 discard = unload_flags == LIGHTREC_REG_DISCARD;
439 }
440
441 if (OPT_EARLY_UNLOAD && rs && rd != rs && (unload || discard)) {
442 rs = lightrec_alloc_reg_in(reg_cache, _jit, rs, in_flags);
443 lightrec_remap_reg(reg_cache, _jit, rs, rd, discard);
444 lightrec_set_reg_out_flags(reg_cache, rs, out_flags);
445 rd = rs;
446 } else {
447 rs = lightrec_alloc_reg_in(reg_cache, _jit, rs, in_flags);
448 rd = lightrec_alloc_reg_out(reg_cache, _jit, rd, out_flags);
449 }
450
451 *rs_out = rs;
452 *rd_out = rd;
453}
454
455static void rec_alu_imm(struct lightrec_cstate *state, const struct block *block,
456 u16 offset, jit_code_t code, bool slti)
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 u8 rs, rt, out_flags = REG_EXT;
462
463 if (slti)
464 out_flags |= REG_ZEXT;
465
466 jit_note(__FILE__, __LINE__);
467
468 rec_alloc_rs_rd(reg_cache, _jit, &block->opcode_list[offset],
469 c.i.rs, c.i.rt, REG_EXT, out_flags, &rs, &rt);
470
471 jit_new_node_www(code, rt, rs, (s32)(s16) c.i.imm);
472
473 lightrec_free_reg(reg_cache, rs);
474 lightrec_free_reg(reg_cache, rt);
475}
476
477static void rec_alu_special(struct lightrec_cstate *state, const struct block *block,
478 u16 offset, jit_code_t code, bool out_ext)
479{
480 struct regcache *reg_cache = state->reg_cache;
481 union code c = block->opcode_list[offset].c;
482 jit_state_t *_jit = block->_jit;
483 u8 rd, rt, rs;
484
485 jit_note(__FILE__, __LINE__);
486
487 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, REG_EXT);
488 rec_alloc_rs_rd(reg_cache, _jit, &block->opcode_list[offset],
489 c.r.rs, c.r.rd, REG_EXT,
490 out_ext ? REG_EXT | REG_ZEXT : 0, &rs, &rd);
491
492 jit_new_node_www(code, rd, rs, rt);
493
494 lightrec_free_reg(reg_cache, rs);
495 lightrec_free_reg(reg_cache, rt);
496 lightrec_free_reg(reg_cache, rd);
497}
498
499static void rec_alu_shiftv(struct lightrec_cstate *state, const struct block *block,
500 u16 offset, jit_code_t code)
501{
502 struct regcache *reg_cache = state->reg_cache;
503 union code c = block->opcode_list[offset].c;
504 jit_state_t *_jit = block->_jit;
505 u8 rd, rt, rs, temp, flags = 0;
506
507 jit_note(__FILE__, __LINE__);
508
509 if (code == jit_code_rshr)
510 flags = REG_EXT;
511 else if (code == jit_code_rshr_u)
512 flags = REG_ZEXT;
513
514 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, 0);
515 rec_alloc_rs_rd(reg_cache, _jit, &block->opcode_list[offset],
516 c.r.rt, c.r.rd, flags, flags, &rt, &rd);
517
518 if (rt != rd) {
519 jit_andi(rd, rs, 0x1f);
520 jit_new_node_www(code, rd, rt, rd);
521 } else {
522 temp = lightrec_alloc_reg_temp(reg_cache, _jit);
523 jit_andi(temp, rs, 0x1f);
524 jit_new_node_www(code, rd, rt, temp);
525 lightrec_free_reg(reg_cache, temp);
526 }
527
528 lightrec_free_reg(reg_cache, rs);
529 lightrec_free_reg(reg_cache, rt);
530 lightrec_free_reg(reg_cache, rd);
531}
532
533static void rec_movi(struct lightrec_cstate *state,
534 const struct block *block, u16 offset)
535{
536 struct regcache *reg_cache = state->reg_cache;
537 union code c = block->opcode_list[offset].c;
538 jit_state_t *_jit = block->_jit;
539 u16 flags = REG_EXT;
540 s32 value = (s32)(s16) c.i.imm;
541 u8 rt;
542
543 if (block->opcode_list[offset].flags & LIGHTREC_MOVI)
544 value += (s32)((u32)state->movi_temp[c.i.rt] << 16);
545
546 if (value >= 0)
547 flags |= REG_ZEXT;
548
549 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, flags);
550
551 jit_movi(rt, value);
552
553 lightrec_free_reg(reg_cache, rt);
554}
555
556static void rec_ADDIU(struct lightrec_cstate *state,
557 const struct block *block, u16 offset)
558{
559 const struct opcode *op = &block->opcode_list[offset];
560
561 _jit_name(block->_jit, __func__);
562
563 if (op->i.rs && !(op->flags & LIGHTREC_MOVI))
564 rec_alu_imm(state, block, offset, jit_code_addi, false);
565 else
566 rec_movi(state, block, offset);
567}
568
569static void rec_ADDI(struct lightrec_cstate *state,
570 const struct block *block, u16 offset)
571{
572 /* TODO: Handle the exception? */
573 _jit_name(block->_jit, __func__);
574 rec_ADDIU(state, block, offset);
575}
576
577static void rec_SLTIU(struct lightrec_cstate *state,
578 const struct block *block, u16 offset)
579{
580 _jit_name(block->_jit, __func__);
581 rec_alu_imm(state, block, offset, jit_code_lti_u, true);
582}
583
584static void rec_SLTI(struct lightrec_cstate *state,
585 const struct block *block, u16 offset)
586{
587 _jit_name(block->_jit, __func__);
588 rec_alu_imm(state, block, offset, jit_code_lti, true);
589}
590
591static void rec_ANDI(struct lightrec_cstate *state,
592 const struct block *block, u16 offset)
593{
594 struct regcache *reg_cache = state->reg_cache;
595 union code c = block->opcode_list[offset].c;
596 jit_state_t *_jit = block->_jit;
597 u8 rs, rt;
598
599 _jit_name(block->_jit, __func__);
600 jit_note(__FILE__, __LINE__);
601
602 rec_alloc_rs_rd(reg_cache, _jit, &block->opcode_list[offset],
603 c.i.rs, c.i.rt, 0, REG_EXT | REG_ZEXT, &rs, &rt);
604
605 /* PSX code uses ANDI 0xff / ANDI 0xffff a lot, which are basically
606 * casts to uint8_t / uint16_t. */
607 if (c.i.imm == 0xff)
608 jit_extr_uc(rt, rs);
609 else if (c.i.imm == 0xffff)
610 jit_extr_us(rt, rs);
611 else
612 jit_andi(rt, rs, (u32)(u16) c.i.imm);
613
614 lightrec_free_reg(reg_cache, rs);
615 lightrec_free_reg(reg_cache, rt);
616}
617
618static void rec_alu_or_xor(struct lightrec_cstate *state, const struct block *block,
619 u16 offset, jit_code_t code)
620{
621 struct regcache *reg_cache = state->reg_cache;
622 union code c = block->opcode_list[offset].c;
623 jit_state_t *_jit = block->_jit;
624 u8 rs, rt, flags;
625
626 jit_note(__FILE__, __LINE__);
627
628 rec_alloc_rs_rd(reg_cache, _jit, &block->opcode_list[offset],
629 c.i.rs, c.i.rt, 0, 0, &rs, &rt);
630
631 flags = lightrec_get_reg_in_flags(reg_cache, rs);
632 lightrec_set_reg_out_flags(reg_cache, rt, flags);
633
634 jit_new_node_www(code, rt, rs, (u32)(u16) c.i.imm);
635
636 lightrec_free_reg(reg_cache, rs);
637 lightrec_free_reg(reg_cache, rt);
638}
639
640
641static void rec_ORI(struct lightrec_cstate *state,
642 const struct block *block, u16 offset)
643{
644 const struct opcode *op = &block->opcode_list[offset];
645 struct regcache *reg_cache = state->reg_cache;
646 jit_state_t *_jit = block->_jit;
647 s32 val;
648 u8 rt;
649
650 _jit_name(_jit, __func__);
651
652 if (op->flags & LIGHTREC_MOVI) {
653 rt = lightrec_alloc_reg_out(reg_cache, _jit, op->i.rt, REG_EXT);
654
655 val = ((u32)state->movi_temp[op->i.rt] << 16) | op->i.imm;
656 jit_movi(rt, val);
657
658 lightrec_free_reg(reg_cache, rt);
659 } else {
660 rec_alu_or_xor(state, block, offset, jit_code_ori);
661 }
662}
663
664static void rec_XORI(struct lightrec_cstate *state,
665 const struct block *block, u16 offset)
666{
667 _jit_name(block->_jit, __func__);
668 rec_alu_or_xor(state, block, offset, jit_code_xori);
669}
670
671static void rec_LUI(struct lightrec_cstate *state,
672 const struct block *block, u16 offset)
673{
674 struct regcache *reg_cache = state->reg_cache;
675 union code c = block->opcode_list[offset].c;
676 jit_state_t *_jit = block->_jit;
677 u8 rt, flags = REG_EXT;
678
679 if (block->opcode_list[offset].flags & LIGHTREC_MOVI) {
680 state->movi_temp[c.i.rt] = c.i.imm;
681 return;
682 }
683
684 jit_name(__func__);
685 jit_note(__FILE__, __LINE__);
686
687 if (!(c.i.imm & BIT(15)))
688 flags |= REG_ZEXT;
689
690 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, flags);
691
692 jit_movi(rt, (s32)(c.i.imm << 16));
693
694 lightrec_free_reg(reg_cache, rt);
695}
696
697static void rec_special_ADDU(struct lightrec_cstate *state,
698 const struct block *block, u16 offset)
699{
700 _jit_name(block->_jit, __func__);
701 rec_alu_special(state, block, offset, jit_code_addr, false);
702}
703
704static void rec_special_ADD(struct lightrec_cstate *state,
705 const struct block *block, u16 offset)
706{
707 /* TODO: Handle the exception? */
708 _jit_name(block->_jit, __func__);
709 rec_alu_special(state, block, offset, jit_code_addr, false);
710}
711
712static void rec_special_SUBU(struct lightrec_cstate *state,
713 const struct block *block, u16 offset)
714{
715 _jit_name(block->_jit, __func__);
716 rec_alu_special(state, block, offset, jit_code_subr, false);
717}
718
719static void rec_special_SUB(struct lightrec_cstate *state,
720 const struct block *block, u16 offset)
721{
722 /* TODO: Handle the exception? */
723 _jit_name(block->_jit, __func__);
724 rec_alu_special(state, block, offset, jit_code_subr, false);
725}
726
727static void rec_special_AND(struct lightrec_cstate *state,
728 const struct block *block, u16 offset)
729{
730 struct regcache *reg_cache = state->reg_cache;
731 union code c = block->opcode_list[offset].c;
732 jit_state_t *_jit = block->_jit;
733 u8 rd, rt, rs, flags_rs, flags_rt, flags_rd;
734
735 _jit_name(block->_jit, __func__);
736 jit_note(__FILE__, __LINE__);
737
738 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, 0);
739 rec_alloc_rs_rd(reg_cache, _jit, &block->opcode_list[offset],
740 c.r.rs, c.r.rd, 0, 0, &rs, &rd);
741
742 flags_rs = lightrec_get_reg_in_flags(reg_cache, rs);
743 flags_rt = lightrec_get_reg_in_flags(reg_cache, rt);
744
745 /* Z(rd) = Z(rs) | Z(rt) */
746 flags_rd = REG_ZEXT & (flags_rs | flags_rt);
747
748 /* E(rd) = (E(rt) & Z(rt)) | (E(rs) & Z(rs)) | (E(rs) & E(rt)) */
749 if (((flags_rs & REG_EXT) && (flags_rt & REG_ZEXT)) ||
750 ((flags_rt & REG_EXT) && (flags_rs & REG_ZEXT)) ||
751 (REG_EXT & flags_rs & flags_rt))
752 flags_rd |= REG_EXT;
753
754 lightrec_set_reg_out_flags(reg_cache, rd, flags_rd);
755
756 jit_andr(rd, rs, rt);
757
758 lightrec_free_reg(reg_cache, rs);
759 lightrec_free_reg(reg_cache, rt);
760 lightrec_free_reg(reg_cache, rd);
761}
762
763static void rec_special_or_nor(struct lightrec_cstate *state,
764 const struct block *block, u16 offset, bool nor)
765{
766 struct regcache *reg_cache = state->reg_cache;
767 union code c = block->opcode_list[offset].c;
768 jit_state_t *_jit = block->_jit;
769 u8 rd, rt, rs, flags_rs, flags_rt, flags_rd = 0;
770
771 jit_note(__FILE__, __LINE__);
772
773 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, 0);
774 rec_alloc_rs_rd(reg_cache, _jit, &block->opcode_list[offset],
775 c.r.rs, c.r.rd, 0, 0, &rs, &rd);
776
777 flags_rs = lightrec_get_reg_in_flags(reg_cache, rs);
778 flags_rt = lightrec_get_reg_in_flags(reg_cache, rt);
779
780 /* or: Z(rd) = Z(rs) & Z(rt)
781 * nor: Z(rd) = 0 */
782 if (!nor)
783 flags_rd = REG_ZEXT & flags_rs & flags_rt;
784
785 /* E(rd) = E(rs) & E(rt) */
786 if (REG_EXT & flags_rs & flags_rt)
787 flags_rd |= REG_EXT;
788
789 lightrec_set_reg_out_flags(reg_cache, rd, flags_rd);
790
791 jit_orr(rd, rs, rt);
792
793 if (nor)
794 jit_comr(rd, rd);
795
796 lightrec_free_reg(reg_cache, rs);
797 lightrec_free_reg(reg_cache, rt);
798 lightrec_free_reg(reg_cache, rd);
799}
800
801static void rec_special_OR(struct lightrec_cstate *state,
802 const struct block *block, u16 offset)
803{
804 _jit_name(block->_jit, __func__);
805 rec_special_or_nor(state, block, offset, false);
806}
807
808static void rec_special_NOR(struct lightrec_cstate *state,
809 const struct block *block, u16 offset)
810{
811 _jit_name(block->_jit, __func__);
812 rec_special_or_nor(state, block, offset, true);
813}
814
815static void rec_special_XOR(struct lightrec_cstate *state,
816 const struct block *block, u16 offset)
817{
818 struct regcache *reg_cache = state->reg_cache;
819 union code c = block->opcode_list[offset].c;
820 jit_state_t *_jit = block->_jit;
821 u8 rd, rt, rs, flags_rs, flags_rt, flags_rd;
822
823 _jit_name(block->_jit, __func__);
824
825 jit_note(__FILE__, __LINE__);
826
827 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, 0);
828 rec_alloc_rs_rd(reg_cache, _jit, &block->opcode_list[offset],
829 c.r.rs, c.r.rd, 0, 0, &rs, &rd);
830
831 flags_rs = lightrec_get_reg_in_flags(reg_cache, rs);
832 flags_rt = lightrec_get_reg_in_flags(reg_cache, rt);
833
834 /* Z(rd) = Z(rs) & Z(rt) */
835 flags_rd = REG_ZEXT & flags_rs & flags_rt;
836
837 /* E(rd) = E(rs) & E(rt) */
838 flags_rd |= REG_EXT & flags_rs & flags_rt;
839
840 lightrec_set_reg_out_flags(reg_cache, rd, flags_rd);
841
842 jit_xorr(rd, rs, rt);
843
844 lightrec_free_reg(reg_cache, rs);
845 lightrec_free_reg(reg_cache, rt);
846 lightrec_free_reg(reg_cache, rd);
847}
848
849static void rec_special_SLTU(struct lightrec_cstate *state,
850 const struct block *block, u16 offset)
851{
852 _jit_name(block->_jit, __func__);
853 rec_alu_special(state, block, offset, jit_code_ltr_u, true);
854}
855
856static void rec_special_SLT(struct lightrec_cstate *state,
857 const struct block *block, u16 offset)
858{
859 _jit_name(block->_jit, __func__);
860 rec_alu_special(state, block, offset, jit_code_ltr, true);
861}
862
863static void rec_special_SLLV(struct lightrec_cstate *state,
864 const struct block *block, u16 offset)
865{
866 _jit_name(block->_jit, __func__);
867 rec_alu_shiftv(state, block, offset, jit_code_lshr);
868}
869
870static void rec_special_SRLV(struct lightrec_cstate *state,
871 const struct block *block, u16 offset)
872{
873 _jit_name(block->_jit, __func__);
874 rec_alu_shiftv(state, block, offset, jit_code_rshr_u);
875}
876
877static void rec_special_SRAV(struct lightrec_cstate *state,
878 const struct block *block, u16 offset)
879{
880 _jit_name(block->_jit, __func__);
881 rec_alu_shiftv(state, block, offset, jit_code_rshr);
882}
883
884static void rec_alu_shift(struct lightrec_cstate *state, const struct block *block,
885 u16 offset, jit_code_t code)
886{
887 struct regcache *reg_cache = state->reg_cache;
888 union code c = block->opcode_list[offset].c;
889 jit_state_t *_jit = block->_jit;
890 u8 rd, rt, flags = 0, out_flags = 0;
891
892 jit_note(__FILE__, __LINE__);
893
894 if (code == jit_code_rshi)
895 flags = REG_EXT;
896 else if (code == jit_code_rshi_u)
897 flags = REG_ZEXT;
898
899 /* Input reg is zero-extended, if we SRL at least by one bit, we know
900 * the output reg will be both zero-extended and sign-extended. */
901 out_flags = flags;
902 if (code == jit_code_rshi_u && c.r.imm)
903 out_flags |= REG_EXT;
904
905 rec_alloc_rs_rd(reg_cache, _jit, &block->opcode_list[offset],
906 c.r.rt, c.r.rd, flags, out_flags, &rt, &rd);
907
908 jit_new_node_www(code, rd, rt, c.r.imm);
909
910 lightrec_free_reg(reg_cache, rt);
911 lightrec_free_reg(reg_cache, rd);
912}
913
914static void rec_special_SLL(struct lightrec_cstate *state,
915 const struct block *block, u16 offset)
916{
917 _jit_name(block->_jit, __func__);
918 rec_alu_shift(state, block, offset, jit_code_lshi);
919}
920
921static void rec_special_SRL(struct lightrec_cstate *state,
922 const struct block *block, u16 offset)
923{
924 _jit_name(block->_jit, __func__);
925 rec_alu_shift(state, block, offset, jit_code_rshi_u);
926}
927
928static void rec_special_SRA(struct lightrec_cstate *state,
929 const struct block *block, u16 offset)
930{
931 _jit_name(block->_jit, __func__);
932 rec_alu_shift(state, block, offset, jit_code_rshi);
933}
934
935static void rec_alu_mult(struct lightrec_cstate *state,
936 const struct block *block, u16 offset, bool is_signed)
937{
938 struct regcache *reg_cache = state->reg_cache;
939 union code c = block->opcode_list[offset].c;
940 u32 flags = block->opcode_list[offset].flags;
941 u8 reg_lo = get_mult_div_lo(c);
942 u8 reg_hi = get_mult_div_hi(c);
943 jit_state_t *_jit = block->_jit;
944 u8 lo, hi, rs, rt, rflags = 0;
945 bool no_lo = op_flag_no_lo(flags);
946 bool no_hi = op_flag_no_hi(flags);
947
948 jit_note(__FILE__, __LINE__);
949
950 if (is_signed)
951 rflags = REG_EXT;
952 else
953 rflags = REG_ZEXT;
954
955 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, rflags);
956 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, rflags);
957
958 if (!no_lo)
959 lo = lightrec_alloc_reg_out(reg_cache, _jit, reg_lo, 0);
960
961 if (!no_hi)
962 hi = lightrec_alloc_reg_out(reg_cache, _jit, reg_hi, REG_EXT);
963
964 if (__WORDSIZE == 32) {
965 /* On 32-bit systems, do a 32*32->64 bit operation, or a 32*32->32 bit
966 * operation if the MULT was detected a 32-bit only. */
967 if (no_lo) {
968 if (is_signed)
969 jit_hmulr(hi, rs, rt);
970 else
971 jit_hmulr_u(hi, rs, rt);
972 } else if (no_hi) {
973 jit_mulr(lo, rs, rt);
974 } else if (is_signed) {
975 jit_qmulr(lo, hi, rs, rt);
976 } else {
977 jit_qmulr_u(lo, hi, rs, rt);
978 }
979 } else {
980 /* On 64-bit systems, do a 64*64->64 bit operation. */
981 if (no_lo) {
982 jit_mulr(hi, rs, rt);
983 jit_rshi(hi, hi, 32);
984 } else {
985 jit_mulr(lo, rs, rt);
986
987 /* The 64-bit output value is in $lo, store the upper 32 bits in $hi */
988 if (!no_hi)
989 jit_rshi(hi, lo, 32);
990 }
991 }
992
993 lightrec_free_reg(reg_cache, rs);
994 lightrec_free_reg(reg_cache, rt);
995 if (!no_lo)
996 lightrec_free_reg(reg_cache, lo);
997 if (!no_hi)
998 lightrec_free_reg(reg_cache, hi);
999}
1000
1001static void rec_alu_div(struct lightrec_cstate *state,
1002 const struct block *block, u16 offset, bool is_signed)
1003{
1004 struct regcache *reg_cache = state->reg_cache;
1005 union code c = block->opcode_list[offset].c;
1006 u32 flags = block->opcode_list[offset].flags;
1007 bool no_check = op_flag_no_div_check(flags);
1008 u8 reg_lo = get_mult_div_lo(c);
1009 u8 reg_hi = get_mult_div_hi(c);
1010 jit_state_t *_jit = block->_jit;
1011 jit_node_t *branch, *to_end;
1012 u8 lo = 0, hi = 0, rs, rt, rflags = 0;
1013
1014 jit_note(__FILE__, __LINE__);
1015
1016 if (is_signed)
1017 rflags = REG_EXT;
1018 else
1019 rflags = REG_ZEXT;
1020
1021 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, rflags);
1022 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, rflags);
1023
1024 if (!op_flag_no_lo(flags))
1025 lo = lightrec_alloc_reg_out(reg_cache, _jit, reg_lo, 0);
1026
1027 if (!op_flag_no_hi(flags))
1028 hi = lightrec_alloc_reg_out(reg_cache, _jit, reg_hi, 0);
1029
1030 /* Jump to special handler if dividing by zero */
1031 if (!no_check)
1032 branch = jit_beqi(rt, 0);
1033
1034 if (op_flag_no_lo(flags)) {
1035 if (is_signed)
1036 jit_remr(hi, rs, rt);
1037 else
1038 jit_remr_u(hi, rs, rt);
1039 } else if (op_flag_no_hi(flags)) {
1040 if (is_signed)
1041 jit_divr(lo, rs, rt);
1042 else
1043 jit_divr_u(lo, rs, rt);
1044 } else {
1045 if (is_signed)
1046 jit_qdivr(lo, hi, rs, rt);
1047 else
1048 jit_qdivr_u(lo, hi, rs, rt);
1049 }
1050
1051 if (!no_check) {
1052 /* Jump above the div-by-zero handler */
1053 to_end = jit_b();
1054
1055 jit_patch(branch);
1056
1057 if (!op_flag_no_lo(flags)) {
1058 if (is_signed) {
1059 jit_ltr(lo, rs, rt);
1060 jit_lshi(lo, lo, 1);
1061 jit_subi(lo, lo, 1);
1062 } else {
1063 jit_subi(lo, rt, 1);
1064 }
1065 }
1066
1067 if (!op_flag_no_hi(flags))
1068 jit_movr(hi, rs);
1069
1070 jit_patch(to_end);
1071 }
1072
1073 lightrec_free_reg(reg_cache, rs);
1074 lightrec_free_reg(reg_cache, rt);
1075
1076 if (!op_flag_no_lo(flags))
1077 lightrec_free_reg(reg_cache, lo);
1078
1079 if (!op_flag_no_hi(flags))
1080 lightrec_free_reg(reg_cache, hi);
1081}
1082
1083static void rec_special_MULT(struct lightrec_cstate *state,
1084 const struct block *block, u16 offset)
1085{
1086 _jit_name(block->_jit, __func__);
1087 rec_alu_mult(state, block, offset, true);
1088}
1089
1090static void rec_special_MULTU(struct lightrec_cstate *state,
1091 const struct block *block, u16 offset)
1092{
1093 _jit_name(block->_jit, __func__);
1094 rec_alu_mult(state, block, offset, false);
1095}
1096
1097static void rec_special_DIV(struct lightrec_cstate *state,
1098 const struct block *block, u16 offset)
1099{
1100 _jit_name(block->_jit, __func__);
1101 rec_alu_div(state, block, offset, true);
1102}
1103
1104static void rec_special_DIVU(struct lightrec_cstate *state,
1105 const struct block *block, u16 offset)
1106{
1107 _jit_name(block->_jit, __func__);
1108 rec_alu_div(state, block, offset, false);
1109}
1110
1111static void rec_alu_mv_lo_hi(struct lightrec_cstate *state,
1112 const struct block *block, u16 offset,
1113 u8 dst, u8 src)
1114{
1115 struct regcache *reg_cache = state->reg_cache;
1116 jit_state_t *_jit = block->_jit;
1117
1118 jit_note(__FILE__, __LINE__);
1119
1120 rec_alloc_rs_rd(reg_cache, _jit, &block->opcode_list[offset],
1121 src, dst, 0, REG_EXT, &src, &dst);
1122
1123 jit_extr_i(dst, src);
1124
1125 lightrec_free_reg(reg_cache, src);
1126 lightrec_free_reg(reg_cache, dst);
1127}
1128
1129static void rec_special_MFHI(struct lightrec_cstate *state,
1130 const struct block *block, u16 offset)
1131{
1132 union code c = block->opcode_list[offset].c;
1133
1134 _jit_name(block->_jit, __func__);
1135 rec_alu_mv_lo_hi(state, block, offset, c.r.rd, REG_HI);
1136}
1137
1138static void rec_special_MTHI(struct lightrec_cstate *state,
1139 const struct block *block, u16 offset)
1140{
1141 union code c = block->opcode_list[offset].c;
1142
1143 _jit_name(block->_jit, __func__);
1144 rec_alu_mv_lo_hi(state, block, offset, REG_HI, c.r.rs);
1145}
1146
1147static void rec_special_MFLO(struct lightrec_cstate *state,
1148 const struct block *block, u16 offset)
1149{
1150 union code c = block->opcode_list[offset].c;
1151
1152 _jit_name(block->_jit, __func__);
1153 rec_alu_mv_lo_hi(state, block, offset, c.r.rd, REG_LO);
1154}
1155
1156static void rec_special_MTLO(struct lightrec_cstate *state,
1157 const struct block *block, u16 offset)
1158{
1159 union code c = block->opcode_list[offset].c;
1160
1161 _jit_name(block->_jit, __func__);
1162 rec_alu_mv_lo_hi(state, block, offset, REG_LO, c.r.rs);
1163}
1164
1165static void call_to_c_wrapper(struct lightrec_cstate *state,
1166 const struct block *block, u32 arg,
1167 enum c_wrappers wrapper)
1168{
1169 struct regcache *reg_cache = state->reg_cache;
1170 jit_state_t *_jit = block->_jit;
1171 s8 tmp, tmp2;
1172
1173 /* Make sure JIT_R1 is not mapped; it will be used in the C wrapper. */
1174 tmp2 = lightrec_alloc_reg(reg_cache, _jit, JIT_R1);
1175
1176 jit_movi(tmp2, (unsigned int)wrapper << (1 + __WORDSIZE / 32));
1177
1178 tmp = lightrec_get_reg_with_value(reg_cache,
1179 (intptr_t) state->state->c_wrapper);
1180 if (tmp < 0) {
1181 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1182 jit_ldxi(tmp, LIGHTREC_REG_STATE, lightrec_offset(c_wrapper));
1183
1184 lightrec_temp_set_value(reg_cache, tmp,
1185 (intptr_t) state->state->c_wrapper);
1186 }
1187
1188 lightrec_free_reg(reg_cache, tmp2);
1189
1190#ifdef __mips__
1191 /* On MIPS, register t9 is always used as the target register for JALR.
1192 * Therefore if it does not contain the target address we must
1193 * invalidate it. */
1194 if (tmp != _T9)
1195 lightrec_unload_reg(reg_cache, _jit, _T9);
1196#endif
1197
1198 jit_prepare();
1199 jit_pushargi(arg);
1200
1201 lightrec_regcache_mark_live(reg_cache, _jit);
1202 jit_callr(tmp);
1203
1204 lightrec_free_reg(reg_cache, tmp);
1205 lightrec_regcache_mark_live(reg_cache, _jit);
1206}
1207
1208static void rec_io(struct lightrec_cstate *state,
1209 const struct block *block, u16 offset,
1210 bool load_rt, bool read_rt)
1211{
1212 struct regcache *reg_cache = state->reg_cache;
1213 jit_state_t *_jit = block->_jit;
1214 union code c = block->opcode_list[offset].c;
1215 u32 flags = block->opcode_list[offset].flags;
1216 bool is_tagged = LIGHTREC_FLAGS_GET_IO_MODE(flags);
1217 u32 lut_entry;
1218 u8 zero;
1219
1220 jit_note(__FILE__, __LINE__);
1221
1222 lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rs, false);
1223
1224 if (read_rt && likely(c.i.rt))
1225 lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rt, true);
1226 else if (load_rt)
1227 lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rt, false);
1228
1229 if (op_flag_load_delay(flags) && !state->no_load_delay) {
1230 /* Clear state->in_delay_slot_n. This notifies the lightrec_rw
1231 * wrapper that it should write the REG_TEMP register instead of
1232 * the actual output register of the opcode. */
1233 zero = lightrec_alloc_reg_in(reg_cache, _jit, 0, 0);
1234 jit_stxi_c(lightrec_offset(in_delay_slot_n),
1235 LIGHTREC_REG_STATE, zero);
1236 lightrec_free_reg(reg_cache, zero);
1237 }
1238
1239 if (is_tagged) {
1240 call_to_c_wrapper(state, block, c.opcode, C_WRAPPER_RW);
1241 } else {
1242 lut_entry = lightrec_get_lut_entry(block);
1243 call_to_c_wrapper(state, block, (lut_entry << 16) | offset,
1244 C_WRAPPER_RW_GENERIC);
1245 }
1246}
1247
1248static u32 rec_ram_mask(const struct lightrec_state *state)
1249{
1250 return (RAM_SIZE << (state->mirrors_mapped * 2)) - 1;
1251}
1252
1253static u32 rec_io_mask(const struct lightrec_state *state)
1254{
1255 u32 length = state->maps[PSX_MAP_HW_REGISTERS].length;
1256
1257 return 0x1f800000 | GENMASK(31 - clz32(length - 1), 0);
1258}
1259
1260static void rec_add_offset(struct lightrec_cstate *cstate,
1261 jit_state_t *_jit, u8 reg_out, u8 reg_in,
1262 uintptr_t offset)
1263{
1264 struct regcache *reg_cache = cstate->reg_cache;
1265 u8 reg_imm;
1266
1267 reg_imm = lightrec_alloc_reg_temp_with_value(reg_cache, _jit, offset);
1268 jit_addr(reg_out, reg_in, reg_imm);
1269
1270 lightrec_free_reg(reg_cache, reg_imm);
1271}
1272
1273static void rec_and_mask(struct lightrec_cstate *cstate,
1274 jit_state_t *_jit, u8 reg_out, u8 reg_in, u32 mask)
1275{
1276 struct regcache *reg_cache = cstate->reg_cache;
1277 u8 reg_imm;
1278
1279 reg_imm = lightrec_alloc_reg_temp_with_value(reg_cache, _jit, mask);
1280 jit_andr(reg_out, reg_in, reg_imm);
1281
1282 lightrec_free_reg(reg_cache, reg_imm);
1283}
1284
1285static void rec_store_memory(struct lightrec_cstate *cstate,
1286 const struct block *block,
1287 u16 offset, jit_code_t code,
1288 jit_code_t swap_code, uintptr_t addr_offset,
1289 u32 addr_mask, bool invalidate)
1290{
1291 const struct lightrec_state *state = cstate->state;
1292 struct regcache *reg_cache = cstate->reg_cache;
1293 struct opcode *op = &block->opcode_list[offset];
1294 jit_state_t *_jit = block->_jit;
1295 union code c = op->c;
1296 u8 rs, rt, tmp = 0, tmp2 = 0, tmp3, addr_reg, addr_reg2;
1297 s16 imm = (s16)c.i.imm;
1298 s32 simm = (s32)imm << (1 - lut_is_32bit(state));
1299 s32 lut_offt = lightrec_offset(code_lut);
1300 bool no_mask = op_flag_no_mask(op->flags);
1301 bool add_imm = c.i.imm &&
1302 (c.i.op == OP_META_SWU
1303 || (!state->mirrors_mapped && !no_mask) || (invalidate &&
1304 ((imm & 0x3) || simm + lut_offt != (s16)(simm + lut_offt))));
1305 bool need_tmp = !no_mask || add_imm || invalidate;
1306 bool swc2 = c.i.op == OP_SWC2;
1307 u8 in_reg = swc2 ? REG_TEMP : c.i.rt;
1308
1309 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
1310 if (need_tmp)
1311 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1312
1313 addr_reg = rs;
1314
1315 if (add_imm) {
1316 jit_addi(tmp, addr_reg, (s16)c.i.imm);
1317 lightrec_free_reg(reg_cache, rs);
1318 addr_reg = tmp;
1319 imm = 0;
1320 } else if (simm) {
1321 lut_offt += simm;
1322 }
1323
1324 if (!no_mask) {
1325 rec_and_mask(cstate, _jit, tmp, addr_reg, addr_mask);
1326 addr_reg = tmp;
1327 }
1328
1329 if (addr_offset) {
1330 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
1331 rec_add_offset(cstate, _jit, tmp2, addr_reg, addr_offset);
1332 addr_reg2 = tmp2;
1333 } else {
1334 addr_reg2 = addr_reg;
1335 }
1336
1337 rt = lightrec_alloc_reg_in(reg_cache, _jit, in_reg, 0);
1338
1339 if (is_big_endian() && swap_code && in_reg) {
1340 tmp3 = lightrec_alloc_reg_temp(reg_cache, _jit);
1341
1342 jit_new_node_ww(swap_code, tmp3, rt);
1343
1344 if (c.i.op == OP_META_SWU)
1345 jit_unstr(addr_reg2, tmp3, LIGHTNING_UNALIGNED_32BIT);
1346 else
1347 jit_new_node_www(code, imm, addr_reg2, tmp3);
1348
1349 lightrec_free_reg(reg_cache, tmp3);
1350 } else if (c.i.op == OP_META_SWU) {
1351 jit_unstr(addr_reg2, rt, LIGHTNING_UNALIGNED_32BIT);
1352 } else {
1353 jit_new_node_www(code, imm, addr_reg2, rt);
1354 }
1355
1356 lightrec_free_reg(reg_cache, rt);
1357
1358 if (invalidate) {
1359 tmp3 = lightrec_alloc_reg_in(reg_cache, _jit, 0, 0);
1360
1361 if (c.i.op != OP_SW) {
1362 jit_andi(tmp, addr_reg, ~3);
1363 addr_reg = tmp;
1364 }
1365
1366 if (!lut_is_32bit(state)) {
1367 jit_lshi(tmp, addr_reg, 1);
1368 addr_reg = tmp;
1369 }
1370
1371 if (addr_reg == rs && c.i.rs == 0) {
1372 addr_reg = LIGHTREC_REG_STATE;
1373 } else {
1374 jit_add_state(tmp, addr_reg);
1375 addr_reg = tmp;
1376 }
1377
1378 if (lut_is_32bit(state))
1379 jit_stxi_i(lut_offt, addr_reg, tmp3);
1380 else
1381 jit_stxi(lut_offt, addr_reg, tmp3);
1382
1383 lightrec_free_reg(reg_cache, tmp3);
1384 }
1385
1386 if (addr_offset)
1387 lightrec_free_reg(reg_cache, tmp2);
1388 if (need_tmp)
1389 lightrec_free_reg(reg_cache, tmp);
1390 lightrec_free_reg(reg_cache, rs);
1391}
1392
1393static void rec_store_ram(struct lightrec_cstate *cstate,
1394 const struct block *block,
1395 u16 offset, jit_code_t code,
1396 jit_code_t swap_code, bool invalidate)
1397{
1398 const struct lightrec_state *state = cstate->state;
1399
1400 _jit_note(block->_jit, __FILE__, __LINE__);
1401
1402 return rec_store_memory(cstate, block, offset, code, swap_code,
1403 state->offset_ram, rec_ram_mask(state),
1404 invalidate);
1405}
1406
1407static void rec_store_scratch(struct lightrec_cstate *cstate,
1408 const struct block *block, u16 offset,
1409 jit_code_t code, jit_code_t swap_code)
1410{
1411 _jit_note(block->_jit, __FILE__, __LINE__);
1412
1413 return rec_store_memory(cstate, block, offset, code, swap_code,
1414 cstate->state->offset_scratch,
1415 0x1fffffff, false);
1416}
1417
1418static void rec_store_io(struct lightrec_cstate *cstate,
1419 const struct block *block, u16 offset,
1420 jit_code_t code, jit_code_t swap_code)
1421{
1422 _jit_note(block->_jit, __FILE__, __LINE__);
1423
1424 return rec_store_memory(cstate, block, offset, code, swap_code,
1425 cstate->state->offset_io,
1426 rec_io_mask(cstate->state), false);
1427}
1428
1429static void rec_store_direct_no_invalidate(struct lightrec_cstate *cstate,
1430 const struct block *block,
1431 u16 offset, jit_code_t code,
1432 jit_code_t swap_code)
1433{
1434 const struct lightrec_state *state = cstate->state;
1435 u32 ram_size = state->mirrors_mapped ? RAM_SIZE * 4 : RAM_SIZE;
1436 struct regcache *reg_cache = cstate->reg_cache;
1437 union code c = block->opcode_list[offset].c;
1438 jit_state_t *_jit = block->_jit;
1439 jit_node_t *to_not_ram, *to_end;
1440 bool swc2 = c.i.op == OP_SWC2;
1441 u8 addr_reg, tmp, tmp2 = 0, rs, rt, in_reg = swc2 ? REG_TEMP : c.i.rt;
1442 s16 imm;
1443
1444 jit_note(__FILE__, __LINE__);
1445 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
1446 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1447
1448 /* Convert to KUNSEG and avoid RAM mirrors */
1449 if ((c.i.op == OP_META_SWU || !state->mirrors_mapped) && c.i.imm) {
1450 imm = 0;
1451 jit_addi(tmp, rs, (s16)c.i.imm);
1452 addr_reg = tmp;
1453 } else {
1454 imm = (s16)c.i.imm;
1455 addr_reg = rs;
1456 }
1457
1458 rec_and_mask(cstate, _jit, tmp, addr_reg, 0x1f800000 | (ram_size - 1));
1459
1460 lightrec_free_reg(reg_cache, rs);
1461
1462 if (state->offset_ram != state->offset_scratch) {
1463 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
1464
1465 to_not_ram = jit_bmsi(tmp, BIT(28));
1466
1467 jit_movi(tmp2, state->offset_ram);
1468
1469 to_end = jit_b();
1470 jit_patch(to_not_ram);
1471
1472 jit_movi(tmp2, state->offset_scratch);
1473 jit_patch(to_end);
1474 } else if (state->offset_ram) {
1475 tmp2 = lightrec_alloc_reg_temp_with_value(reg_cache, _jit,
1476 state->offset_ram);
1477 }
1478
1479 if (state->offset_ram || state->offset_scratch) {
1480 jit_addr(tmp, tmp, tmp2);
1481 lightrec_free_reg(reg_cache, tmp2);
1482 }
1483
1484 rt = lightrec_alloc_reg_in(reg_cache, _jit, in_reg, 0);
1485
1486 if (is_big_endian() && swap_code && in_reg) {
1487 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
1488
1489 jit_new_node_ww(swap_code, tmp2, rt);
1490
1491 if (c.i.op == OP_META_SWU)
1492 jit_unstr(tmp, tmp2, LIGHTNING_UNALIGNED_32BIT);
1493 else
1494 jit_new_node_www(code, imm, tmp, tmp2);
1495
1496 lightrec_free_reg(reg_cache, tmp2);
1497 } else if (c.i.op == OP_META_SWU) {
1498 jit_unstr(tmp, rt, LIGHTNING_UNALIGNED_32BIT);
1499 } else {
1500 jit_new_node_www(code, imm, tmp, rt);
1501 }
1502
1503 lightrec_free_reg(reg_cache, rt);
1504 lightrec_free_reg(reg_cache, tmp);
1505}
1506
1507static void rec_store_direct(struct lightrec_cstate *cstate, const struct block *block,
1508 u16 offset, jit_code_t code, jit_code_t swap_code)
1509{
1510 const struct lightrec_state *state = cstate->state;
1511 u32 ram_size = state->mirrors_mapped ? RAM_SIZE * 4 : RAM_SIZE;
1512 struct regcache *reg_cache = cstate->reg_cache;
1513 union code c = block->opcode_list[offset].c;
1514 jit_state_t *_jit = block->_jit;
1515 jit_node_t *to_not_ram, *to_end;
1516 bool swc2 = c.i.op == OP_SWC2;
1517 u8 addr_reg, tmp, tmp2, tmp3, rs, rt, reg_imm;
1518 u8 in_reg = swc2 ? REG_TEMP : c.i.rt;
1519 u32 mask;
1520 bool different_offsets = state->offset_ram != state->offset_scratch;
1521
1522 jit_note(__FILE__, __LINE__);
1523
1524 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
1525 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
1526 tmp3 = lightrec_alloc_reg_in(reg_cache, _jit, 0, 0);
1527
1528 /* Convert to KUNSEG and avoid RAM mirrors */
1529 if (c.i.imm) {
1530 jit_addi(tmp2, rs, (s16)c.i.imm);
1531 addr_reg = tmp2;
1532 } else {
1533 addr_reg = rs;
1534 }
1535
1536 rec_and_mask(cstate, _jit, tmp2, addr_reg, 0x1f800000 | (ram_size - 1));
1537
1538 lightrec_free_reg(reg_cache, rs);
1539 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1540
1541 mask = c.i.op == OP_SW ? RAM_SIZE - 1 : (RAM_SIZE - 1) & ~3;
1542 reg_imm = lightrec_alloc_reg_temp_with_value(reg_cache, _jit, mask);
1543
1544 if (different_offsets) {
1545 to_not_ram = jit_bgti(tmp2, ram_size);
1546 addr_reg = tmp2;
1547 } else {
1548 jit_lti_u(tmp, tmp2, ram_size);
1549 jit_movnr(tmp, tmp2, tmp);
1550 addr_reg = tmp;
1551 }
1552
1553 /* Compute the offset to the code LUT */
1554 jit_andr(tmp, addr_reg, reg_imm);
1555
1556 if (!lut_is_32bit(state))
1557 jit_lshi(tmp, tmp, 1);
1558 jit_add_state(tmp, tmp);
1559
1560 /* Write NULL to the code LUT to invalidate any block that's there */
1561 if (lut_is_32bit(state))
1562 jit_stxi_i(lightrec_offset(code_lut), tmp, tmp3);
1563 else
1564 jit_stxi(lightrec_offset(code_lut), tmp, tmp3);
1565
1566 if (c.i.op == OP_META_SWU) {
1567 /* With a SWU opcode, we might have touched the following 32-bit
1568 * word, so invalidate it as well */
1569 if (lut_is_32bit(state)) {
1570 jit_stxi_i(lightrec_offset(code_lut) + 4, tmp, tmp3);
1571 } else {
1572 jit_stxi(lightrec_offset(code_lut) + sizeof(uintptr_t),
1573 tmp, tmp3);
1574 }
1575 }
1576
1577 if (different_offsets) {
1578 jit_movi(tmp, state->offset_ram);
1579
1580 to_end = jit_b();
1581 jit_patch(to_not_ram);
1582 }
1583
1584 if (state->offset_ram || state->offset_scratch)
1585 jit_movi(tmp, state->offset_scratch);
1586
1587 if (different_offsets)
1588 jit_patch(to_end);
1589
1590 if (state->offset_ram || state->offset_scratch)
1591 jit_addr(tmp2, tmp2, tmp);
1592
1593 lightrec_free_reg(reg_cache, tmp);
1594 lightrec_free_reg(reg_cache, tmp3);
1595 lightrec_free_reg(reg_cache, reg_imm);
1596
1597 rt = lightrec_alloc_reg_in(reg_cache, _jit, in_reg, 0);
1598
1599 if (is_big_endian() && swap_code && in_reg) {
1600 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1601
1602 jit_new_node_ww(swap_code, tmp, rt);
1603
1604 if (c.i.op == OP_META_SWU)
1605 jit_unstr(tmp2, tmp, LIGHTNING_UNALIGNED_32BIT);
1606 else
1607 jit_new_node_www(code, 0, tmp2, tmp);
1608
1609 lightrec_free_reg(reg_cache, tmp);
1610 } else if (c.i.op == OP_META_SWU) {
1611 jit_unstr(tmp2, rt, LIGHTNING_UNALIGNED_32BIT);
1612 } else {
1613 jit_new_node_www(code, 0, tmp2, rt);
1614 }
1615
1616 lightrec_free_reg(reg_cache, rt);
1617 lightrec_free_reg(reg_cache, tmp2);
1618}
1619
1620static void rec_store(struct lightrec_cstate *state,
1621 const struct block *block, u16 offset,
1622 jit_code_t code, jit_code_t swap_code)
1623{
1624 u32 flags = block->opcode_list[offset].flags;
1625 u32 mode = LIGHTREC_FLAGS_GET_IO_MODE(flags);
1626 bool no_invalidate = op_flag_no_invalidate(flags) ||
1627 (state->state->opt_flags & LIGHTREC_OPT_INV_DMA_ONLY);
1628 union code c = block->opcode_list[offset].c;
1629 bool is_swc2 = c.i.op == OP_SWC2;
1630
1631 if (is_swc2) {
1632 switch (mode) {
1633 case LIGHTREC_IO_RAM:
1634 case LIGHTREC_IO_SCRATCH:
1635 case LIGHTREC_IO_DIRECT:
1636 case LIGHTREC_IO_DIRECT_HW:
1637 rec_cp2_do_mfc2(state, block, offset, c.i.rt, REG_TEMP);
1638 break;
1639 default:
1640 break;
1641 }
1642 }
1643
1644 switch (mode) {
1645 case LIGHTREC_IO_RAM:
1646 rec_store_ram(state, block, offset, code,
1647 swap_code, !no_invalidate);
1648 break;
1649 case LIGHTREC_IO_SCRATCH:
1650 rec_store_scratch(state, block, offset, code, swap_code);
1651 break;
1652 case LIGHTREC_IO_DIRECT:
1653 if (no_invalidate) {
1654 rec_store_direct_no_invalidate(state, block, offset,
1655 code, swap_code);
1656 } else {
1657 rec_store_direct(state, block, offset, code, swap_code);
1658 }
1659 break;
1660 case LIGHTREC_IO_DIRECT_HW:
1661 rec_store_io(state, block, offset, code, swap_code);
1662 break;
1663 default:
1664 rec_io(state, block, offset, true, false);
1665 return;
1666 }
1667
1668 if (is_swc2)
1669 lightrec_discard_reg_if_loaded(state->reg_cache, REG_TEMP);
1670}
1671
1672static void rec_SB(struct lightrec_cstate *state,
1673 const struct block *block, u16 offset)
1674{
1675 _jit_name(block->_jit, __func__);
1676 rec_store(state, block, offset, jit_code_stxi_c, 0);
1677}
1678
1679static void rec_SH(struct lightrec_cstate *state,
1680 const struct block *block, u16 offset)
1681{
1682 _jit_name(block->_jit, __func__);
1683 rec_store(state, block, offset,
1684 jit_code_stxi_s, jit_code_bswapr_us);
1685}
1686
1687static void rec_SW(struct lightrec_cstate *state,
1688 const struct block *block, u16 offset)
1689
1690{
1691 union code c = block->opcode_list[offset].c;
1692
1693 _jit_name(block->_jit, c.i.op == OP_SWC2 ? "rec_SWC2" : "rec_SW");
1694 rec_store(state, block, offset,
1695 jit_code_stxi_i, jit_code_bswapr_ui);
1696}
1697
1698static void rec_SWL(struct lightrec_cstate *state,
1699 const struct block *block, u16 offset)
1700{
1701 _jit_name(block->_jit, __func__);
1702 rec_io(state, block, offset, true, false);
1703}
1704
1705static void rec_SWR(struct lightrec_cstate *state,
1706 const struct block *block, u16 offset)
1707{
1708 _jit_name(block->_jit, __func__);
1709 rec_io(state, block, offset, true, false);
1710}
1711
1712static void rec_load_memory(struct lightrec_cstate *cstate,
1713 const struct block *block, u16 offset,
1714 jit_code_t code, jit_code_t swap_code, bool is_unsigned,
1715 uintptr_t addr_offset, u32 addr_mask)
1716{
1717 struct lightrec_state *state = cstate->state;
1718 struct regcache *reg_cache = cstate->reg_cache;
1719 struct opcode *op = &block->opcode_list[offset];
1720 bool load_delay = op_flag_load_delay(op->flags) && !cstate->no_load_delay;
1721 jit_state_t *_jit = block->_jit;
1722 u8 rs, rt, out_reg, addr_reg, flags = REG_EXT;
1723 bool no_mask = op_flag_no_mask(op->flags);
1724 union code c = op->c;
1725 s16 imm;
1726
1727 if (load_delay || c.i.op == OP_LWC2)
1728 out_reg = REG_TEMP;
1729 else if (c.i.rt)
1730 out_reg = c.i.rt;
1731 else
1732 return;
1733
1734 if (is_unsigned)
1735 flags |= REG_ZEXT;
1736
1737 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
1738 rt = lightrec_alloc_reg_out(reg_cache, _jit, out_reg, flags);
1739
1740 if ((op->i.op == OP_META_LWU && c.i.imm)
1741 || (!state->mirrors_mapped && c.i.imm && !no_mask)) {
1742 jit_addi(rt, rs, (s16)c.i.imm);
1743 addr_reg = rt;
1744 imm = 0;
1745 } else {
1746 addr_reg = rs;
1747 imm = (s16)c.i.imm;
1748 }
1749
1750 if (op->i.op == OP_META_LWU)
1751 imm = LIGHTNING_UNALIGNED_32BIT;
1752
1753 if (!no_mask) {
1754 rec_and_mask(cstate, _jit, rt, addr_reg, addr_mask);
1755 addr_reg = rt;
1756 }
1757
1758 if (addr_offset) {
1759 rec_add_offset(cstate, _jit, rt, addr_reg, addr_offset);
1760 addr_reg = rt;
1761 }
1762
1763 jit_new_node_www(code, rt, addr_reg, imm);
1764
1765 if (is_big_endian() && swap_code) {
1766 jit_new_node_ww(swap_code, rt, rt);
1767
1768 if (c.i.op == OP_LH)
1769 jit_extr_s(rt, rt);
1770 else if (c.i.op == OP_LW && __WORDSIZE == 64)
1771 jit_extr_i(rt, rt);
1772 }
1773
1774 lightrec_free_reg(reg_cache, rs);
1775 lightrec_free_reg(reg_cache, rt);
1776}
1777
1778static void rec_load_ram(struct lightrec_cstate *cstate,
1779 const struct block *block, u16 offset,
1780 jit_code_t code, jit_code_t swap_code, bool is_unsigned)
1781{
1782 _jit_note(block->_jit, __FILE__, __LINE__);
1783
1784 rec_load_memory(cstate, block, offset, code, swap_code, is_unsigned,
1785 cstate->state->offset_ram, rec_ram_mask(cstate->state));
1786}
1787
1788static void rec_load_bios(struct lightrec_cstate *cstate,
1789 const struct block *block, u16 offset,
1790 jit_code_t code, jit_code_t swap_code, bool is_unsigned)
1791{
1792 _jit_note(block->_jit, __FILE__, __LINE__);
1793
1794 rec_load_memory(cstate, block, offset, code, swap_code, is_unsigned,
1795 cstate->state->offset_bios, 0x1fffffff);
1796}
1797
1798static void rec_load_scratch(struct lightrec_cstate *cstate,
1799 const struct block *block, u16 offset,
1800 jit_code_t code, jit_code_t swap_code, bool is_unsigned)
1801{
1802 _jit_note(block->_jit, __FILE__, __LINE__);
1803
1804 rec_load_memory(cstate, block, offset, code, swap_code, is_unsigned,
1805 cstate->state->offset_scratch, 0x1fffffff);
1806}
1807
1808static void rec_load_io(struct lightrec_cstate *cstate,
1809 const struct block *block, u16 offset,
1810 jit_code_t code, jit_code_t swap_code, bool is_unsigned)
1811{
1812 _jit_note(block->_jit, __FILE__, __LINE__);
1813
1814 rec_load_memory(cstate, block, offset, code, swap_code, is_unsigned,
1815 cstate->state->offset_io, rec_io_mask(cstate->state));
1816}
1817
1818static void rec_load_direct(struct lightrec_cstate *cstate,
1819 const struct block *block, u16 offset,
1820 jit_code_t code, jit_code_t swap_code,
1821 bool is_unsigned)
1822{
1823 const struct lightrec_state *state = cstate->state;
1824 struct regcache *reg_cache = cstate->reg_cache;
1825 struct opcode *op = &block->opcode_list[offset];
1826 bool load_delay = op_flag_load_delay(op->flags) && !cstate->no_load_delay;
1827 jit_state_t *_jit = block->_jit;
1828 jit_node_t *to_not_ram, *to_not_bios, *to_end, *to_end2;
1829 u8 tmp, rs, rt, out_reg, addr_reg, flags = REG_EXT;
1830 bool different_offsets = state->offset_bios != state->offset_scratch;
1831 union code c = op->c;
1832 s32 addr_mask;
1833 u32 reg_imm;
1834 s8 offt_reg;
1835 s16 imm;
1836
1837 if (load_delay || c.i.op == OP_LWC2)
1838 out_reg = REG_TEMP;
1839 else if (c.i.rt)
1840 out_reg = c.i.rt;
1841 else
1842 return;
1843
1844 if (is_unsigned)
1845 flags |= REG_ZEXT;
1846
1847 jit_note(__FILE__, __LINE__);
1848 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0);
1849 rt = lightrec_alloc_reg_out(reg_cache, _jit, out_reg, flags);
1850
1851 if ((state->offset_ram == state->offset_bios &&
1852 state->offset_ram == state->offset_scratch &&
1853 state->mirrors_mapped && c.i.op != OP_META_LWU)
1854 || !c.i.imm) {
1855 addr_reg = rs;
1856 imm = (s16)c.i.imm;
1857 } else {
1858 jit_addi(rt, rs, (s16)c.i.imm);
1859 addr_reg = rt;
1860 imm = 0;
1861
1862 if (c.i.rs != c.i.rt)
1863 lightrec_free_reg(reg_cache, rs);
1864 }
1865
1866 if (op->i.op == OP_META_LWU)
1867 imm = LIGHTNING_UNALIGNED_32BIT;
1868
1869 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
1870
1871 if (state->offset_ram == state->offset_bios &&
1872 state->offset_ram == state->offset_scratch) {
1873 if (!state->mirrors_mapped)
1874 addr_mask = 0x1f800000 | (RAM_SIZE - 1);
1875 else
1876 addr_mask = 0x1fffffff;
1877
1878 reg_imm = lightrec_alloc_reg_temp_with_value(reg_cache, _jit,
1879 addr_mask);
1880 if (!state->mirrors_mapped) {
1881 jit_andi(tmp, addr_reg, BIT(28));
1882 jit_rshi_u(tmp, tmp, 28 - 22);
1883 jit_orr(tmp, tmp, reg_imm);
1884 jit_andr(rt, addr_reg, tmp);
1885 } else {
1886 jit_andr(rt, addr_reg, reg_imm);
1887 }
1888
1889 lightrec_free_reg(reg_cache, reg_imm);
1890
1891 if (state->offset_ram) {
1892 offt_reg = lightrec_get_reg_with_value(reg_cache,
1893 state->offset_ram);
1894 if (offt_reg < 0) {
1895 jit_movi(tmp, state->offset_ram);
1896 lightrec_temp_set_value(reg_cache, tmp,
1897 state->offset_ram);
1898 } else {
1899 lightrec_free_reg(reg_cache, tmp);
1900 tmp = offt_reg;
1901 }
1902 }
1903 } else {
1904 to_not_ram = jit_bmsi(addr_reg, BIT(28));
1905
1906 /* Convert to KUNSEG and avoid RAM mirrors */
1907 jit_andi(rt, addr_reg, RAM_SIZE - 1);
1908
1909 if (state->offset_ram)
1910 jit_movi(tmp, state->offset_ram);
1911
1912 to_end = jit_b();
1913
1914 jit_patch(to_not_ram);
1915
1916 if (different_offsets)
1917 to_not_bios = jit_bmci(addr_reg, BIT(22));
1918
1919 /* Convert to KUNSEG */
1920 jit_andi(rt, addr_reg, 0x1fc00000 | (BIOS_SIZE - 1));
1921
1922 jit_movi(tmp, state->offset_bios);
1923
1924 if (different_offsets) {
1925 to_end2 = jit_b();
1926
1927 jit_patch(to_not_bios);
1928
1929 /* Convert to KUNSEG */
1930 jit_andi(rt, addr_reg, 0x1f800fff);
1931
1932 if (state->offset_scratch)
1933 jit_movi(tmp, state->offset_scratch);
1934
1935 jit_patch(to_end2);
1936 }
1937
1938 jit_patch(to_end);
1939 }
1940
1941 if (state->offset_ram || state->offset_bios || state->offset_scratch)
1942 jit_addr(rt, rt, tmp);
1943
1944 jit_new_node_www(code, rt, rt, imm);
1945
1946 if (is_big_endian() && swap_code) {
1947 jit_new_node_ww(swap_code, rt, rt);
1948
1949 if (c.i.op == OP_LH)
1950 jit_extr_s(rt, rt);
1951 else if (c.i.op == OP_LW && __WORDSIZE == 64)
1952 jit_extr_i(rt, rt);
1953 }
1954
1955 lightrec_free_reg(reg_cache, addr_reg);
1956 lightrec_free_reg(reg_cache, rt);
1957 lightrec_free_reg(reg_cache, tmp);
1958}
1959
1960static void rec_load(struct lightrec_cstate *state, const struct block *block,
1961 u16 offset, jit_code_t code, jit_code_t swap_code,
1962 bool is_unsigned)
1963{
1964 const struct opcode *op = &block->opcode_list[offset];
1965 u32 flags = op->flags;
1966
1967 switch (LIGHTREC_FLAGS_GET_IO_MODE(flags)) {
1968 case LIGHTREC_IO_RAM:
1969 rec_load_ram(state, block, offset, code, swap_code, is_unsigned);
1970 break;
1971 case LIGHTREC_IO_BIOS:
1972 rec_load_bios(state, block, offset, code, swap_code, is_unsigned);
1973 break;
1974 case LIGHTREC_IO_SCRATCH:
1975 rec_load_scratch(state, block, offset, code, swap_code, is_unsigned);
1976 break;
1977 case LIGHTREC_IO_DIRECT_HW:
1978 rec_load_io(state, block, offset, code, swap_code, is_unsigned);
1979 break;
1980 case LIGHTREC_IO_DIRECT:
1981 rec_load_direct(state, block, offset, code, swap_code, is_unsigned);
1982 break;
1983 default:
1984 rec_io(state, block, offset, false, true);
1985 return;
1986 }
1987
1988 if (op->i.op == OP_LWC2) {
1989 rec_cp2_do_mtc2(state, block, offset, op->i.rt, REG_TEMP);
1990 lightrec_discard_reg_if_loaded(state->reg_cache, REG_TEMP);
1991 }
1992}
1993
1994static void rec_LB(struct lightrec_cstate *state, const struct block *block, u16 offset)
1995{
1996 _jit_name(block->_jit, __func__);
1997 rec_load(state, block, offset, jit_code_ldxi_c, 0, false);
1998}
1999
2000static void rec_LBU(struct lightrec_cstate *state, const struct block *block, u16 offset)
2001{
2002 _jit_name(block->_jit, __func__);
2003 rec_load(state, block, offset, jit_code_ldxi_uc, 0, true);
2004}
2005
2006static void rec_LH(struct lightrec_cstate *state, const struct block *block, u16 offset)
2007{
2008 jit_code_t code = is_big_endian() ? jit_code_ldxi_us : jit_code_ldxi_s;
2009
2010 _jit_name(block->_jit, __func__);
2011 rec_load(state, block, offset, code, jit_code_bswapr_us, false);
2012}
2013
2014static void rec_LHU(struct lightrec_cstate *state, const struct block *block, u16 offset)
2015{
2016 _jit_name(block->_jit, __func__);
2017 rec_load(state, block, offset, jit_code_ldxi_us, jit_code_bswapr_us, true);
2018}
2019
2020static void rec_LWL(struct lightrec_cstate *state, const struct block *block, u16 offset)
2021{
2022 _jit_name(block->_jit, __func__);
2023 rec_io(state, block, offset, true, true);
2024}
2025
2026static void rec_LWR(struct lightrec_cstate *state, const struct block *block, u16 offset)
2027{
2028 _jit_name(block->_jit, __func__);
2029 rec_io(state, block, offset, true, true);
2030}
2031
2032static void rec_LW(struct lightrec_cstate *state, const struct block *block, u16 offset)
2033{
2034 union code c = block->opcode_list[offset].c;
2035 jit_code_t code;
2036
2037 if (is_big_endian() && __WORDSIZE == 64)
2038 code = jit_code_ldxi_ui;
2039 else
2040 code = jit_code_ldxi_i;
2041
2042 _jit_name(block->_jit, c.i.op == OP_LWC2 ? "rec_LWC2" : "rec_LW");
2043 rec_load(state, block, offset, code, jit_code_bswapr_ui, false);
2044}
2045
2046static void rec_exit_early(struct lightrec_cstate *state,
2047 const struct block *block, u16 offset,
2048 u32 exit_code, u32 pc)
2049{
2050 struct regcache *reg_cache = state->reg_cache;
2051 jit_state_t *_jit = block->_jit;
2052 u8 tmp;
2053
2054 _jit_note(block->_jit, __FILE__, __LINE__);
2055
2056 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2057
2058 jit_movi(tmp, exit_code);
2059 jit_stxi_i(lightrec_offset(exit_flags), LIGHTREC_REG_STATE, tmp);
2060
2061 jit_ldxi_i(tmp, LIGHTREC_REG_STATE, lightrec_offset(target_cycle));
2062 jit_subr(tmp, tmp, LIGHTREC_REG_CYCLE);
2063 jit_movi(LIGHTREC_REG_CYCLE, 0);
2064 jit_stxi_i(lightrec_offset(target_cycle), LIGHTREC_REG_STATE, tmp);
2065 jit_stxi_i(lightrec_offset(current_cycle), LIGHTREC_REG_STATE, tmp);
2066
2067 lightrec_free_reg(reg_cache, tmp);
2068
2069 lightrec_emit_end_of_block(state, block, offset, -1, pc, 31, 0, true);
2070}
2071
2072static void rec_special_SYSCALL(struct lightrec_cstate *state,
2073 const struct block *block, u16 offset)
2074{
2075 _jit_name(block->_jit, __func__);
2076
2077 /* TODO: the return address should be "pc - 4" if we're a delay slot */
2078 rec_exit_early(state, block, offset, LIGHTREC_EXIT_SYSCALL,
2079 get_ds_pc(block, offset, 0));
2080}
2081
2082static void rec_special_BREAK(struct lightrec_cstate *state,
2083 const struct block *block, u16 offset)
2084{
2085 _jit_name(block->_jit, __func__);
2086 rec_exit_early(state, block, offset, LIGHTREC_EXIT_BREAK,
2087 get_ds_pc(block, offset, 0));
2088}
2089
2090static void rec_mfc(struct lightrec_cstate *state, const struct block *block, u16 offset)
2091{
2092 struct regcache *reg_cache = state->reg_cache;
2093 union code c = block->opcode_list[offset].c;
2094 jit_state_t *_jit = block->_jit;
2095
2096 jit_note(__FILE__, __LINE__);
2097
2098 if (c.i.op != OP_SWC2)
2099 lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rt, true);
2100
2101 call_to_c_wrapper(state, block, c.opcode, C_WRAPPER_MFC);
2102}
2103
2104static void rec_mtc(struct lightrec_cstate *state, const struct block *block, u16 offset)
2105{
2106 struct regcache *reg_cache = state->reg_cache;
2107 union code c = block->opcode_list[offset].c;
2108 jit_state_t *_jit = block->_jit;
2109
2110 jit_note(__FILE__, __LINE__);
2111 lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rs, false);
2112 lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rt, false);
2113 lightrec_clean_reg_if_loaded(reg_cache, _jit, REG_TEMP, false);
2114
2115 call_to_c_wrapper(state, block, c.opcode, C_WRAPPER_MTC);
2116
2117 if (c.i.op == OP_CP0 &&
2118 !op_flag_no_ds(block->opcode_list[offset].flags) &&
2119 (c.r.rd == 12 || c.r.rd == 13))
2120 lightrec_emit_end_of_block(state, block, offset, -1,
2121 get_ds_pc(block, offset, 1),
2122 0, 0, true);
2123}
2124
2125static void
2126rec_mfc0(struct lightrec_cstate *state, const struct block *block, u16 offset)
2127{
2128 struct regcache *reg_cache = state->reg_cache;
2129 union code c = block->opcode_list[offset].c;
2130 jit_state_t *_jit = block->_jit;
2131 u8 rt;
2132
2133 jit_note(__FILE__, __LINE__);
2134
2135 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, REG_EXT);
2136
2137 jit_ldxi_i(rt, LIGHTREC_REG_STATE, lightrec_offset(regs.cp0[c.r.rd]));
2138
2139 lightrec_free_reg(reg_cache, rt);
2140}
2141
2142static bool block_uses_icache(const struct lightrec_cstate *state,
2143 const struct block *block)
2144{
2145 const struct lightrec_mem_map *map = &state->state->maps[PSX_MAP_KERNEL_USER_RAM];
2146 u32 pc = kunseg(block->pc);
2147
2148 if (pc < map->pc || pc >= map->pc + map->length)
2149 return false;
2150
2151 return (block->pc >> 28) < 0xa;
2152}
2153
2154static void
2155rec_mtc0(struct lightrec_cstate *state, const struct block *block, u16 offset)
2156{
2157 struct regcache *reg_cache = state->reg_cache;
2158 const union code c = block->opcode_list[offset].c;
2159 jit_state_t *_jit = block->_jit;
2160 u8 rt, tmp = 0, tmp2, status;
2161 jit_node_t *to_end;
2162
2163 jit_note(__FILE__, __LINE__);
2164
2165 switch(c.r.rd) {
2166 case 1:
2167 case 4:
2168 case 8:
2169 case 14:
2170 case 15:
2171 /* Those registers are read-only */
2172 return;
2173 default:
2174 break;
2175 }
2176
2177 if (!block_uses_icache(state, block) && c.r.rd == 12) {
2178 /* If we are not running code from the RAM through kuseg or
2179 * kseg0, handle writes to the Status register in C; as the
2180 * code may toggle bit 16 which isolates the cache. Code
2181 * running from kuseg or kseg0 in RAM cannot do that. */
2182 rec_mtc(state, block, offset);
2183 return;
2184 }
2185
2186 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rt, 0);
2187
2188 if (c.r.rd != 13)
2189 jit_stxi_i(lightrec_offset(regs.cp0[c.r.rd]), LIGHTREC_REG_STATE, rt);
2190
2191 if (c.r.rd == 12 || c.r.rd == 13) {
2192 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2193 jit_ldxi_i(tmp, LIGHTREC_REG_STATE, lightrec_offset(regs.cp0[13]));
2194
2195 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
2196 }
2197
2198 if (c.r.rd == 12) {
2199 status = rt;
2200 } else if (c.r.rd == 13) {
2201 /* Cause = (Cause & ~0x0300) | (value & 0x0300) */
2202 jit_andi(tmp2, rt, 0x0300);
2203 jit_ori(tmp, tmp, 0x0300);
2204 jit_xori(tmp, tmp, 0x0300);
2205 jit_orr(tmp, tmp, tmp2);
2206 jit_ldxi_i(tmp2, LIGHTREC_REG_STATE, lightrec_offset(regs.cp0[12]));
2207 jit_stxi_i(lightrec_offset(regs.cp0[13]), LIGHTREC_REG_STATE, tmp);
2208 status = tmp2;
2209 }
2210
2211 if (c.r.rd == 12 || c.r.rd == 13) {
2212 /* Exit dynarec in case there's a software interrupt.
2213 * exit_flags = !!(status & tmp & 0x0300) & status; */
2214 jit_andr(tmp, tmp, status);
2215 jit_andi(tmp, tmp, 0x0300);
2216 jit_nei(tmp, tmp, 0);
2217 jit_andr(tmp, tmp, status);
2218 }
2219
2220 if (c.r.rd == 12) {
2221 /* Exit dynarec in case we unmask a hardware interrupt.
2222 * exit_flags = !(~status & 0x401) */
2223
2224 jit_comr(tmp2, status);
2225 jit_andi(tmp2, tmp2, 0x401);
2226 jit_eqi(tmp2, tmp2, 0);
2227 jit_orr(tmp, tmp, tmp2);
2228 }
2229
2230 lightrec_free_reg(reg_cache, rt);
2231
2232 if (c.r.rd == 12 || c.r.rd == 13) {
2233 to_end = jit_beqi(tmp, 0);
2234
2235 jit_ldxi_i(tmp2, LIGHTREC_REG_STATE, lightrec_offset(target_cycle));
2236 jit_subr(tmp2, tmp2, LIGHTREC_REG_CYCLE);
2237 jit_movi(LIGHTREC_REG_CYCLE, 0);
2238 jit_stxi_i(lightrec_offset(target_cycle), LIGHTREC_REG_STATE, tmp2);
2239 jit_stxi_i(lightrec_offset(current_cycle), LIGHTREC_REG_STATE, tmp2);
2240
2241
2242 jit_patch(to_end);
2243 }
2244
2245 if (!op_flag_no_ds(block->opcode_list[offset].flags) &&
2246 (c.r.rd == 12 || c.r.rd == 13)) {
2247 state->cycles += lightrec_cycles_of_opcode(state->state, c);
2248 lightrec_emit_eob(state, block, offset + 1);
2249 }
2250}
2251
2252static void rec_cp0_MFC0(struct lightrec_cstate *state,
2253 const struct block *block, u16 offset)
2254{
2255 _jit_name(block->_jit, __func__);
2256 rec_mfc0(state, block, offset);
2257}
2258
2259static void rec_cp0_CFC0(struct lightrec_cstate *state,
2260 const struct block *block, u16 offset)
2261{
2262 _jit_name(block->_jit, __func__);
2263 rec_mfc0(state, block, offset);
2264}
2265
2266static void rec_cp0_MTC0(struct lightrec_cstate *state,
2267 const struct block *block, u16 offset)
2268{
2269 _jit_name(block->_jit, __func__);
2270 rec_mtc0(state, block, offset);
2271}
2272
2273static void rec_cp0_CTC0(struct lightrec_cstate *state,
2274 const struct block *block, u16 offset)
2275{
2276 _jit_name(block->_jit, __func__);
2277 rec_mtc0(state, block, offset);
2278}
2279
2280static unsigned int cp2d_i_offset(u8 reg)
2281{
2282 return lightrec_offset(regs.cp2d[reg]);
2283}
2284
2285static unsigned int cp2d_s_offset(u8 reg)
2286{
2287 return cp2d_i_offset(reg) + is_big_endian() * 2;
2288}
2289
2290static unsigned int cp2c_i_offset(u8 reg)
2291{
2292 return lightrec_offset(regs.cp2c[reg]);
2293}
2294
2295static unsigned int cp2c_s_offset(u8 reg)
2296{
2297 return cp2c_i_offset(reg) + is_big_endian() * 2;
2298}
2299
2300static void rec_cp2_do_mfc2(struct lightrec_cstate *state,
2301 const struct block *block, u16 offset,
2302 u8 reg, u8 out_reg)
2303{
2304 struct regcache *reg_cache = state->reg_cache;
2305 jit_state_t *_jit = block->_jit;
2306 const u32 zext_regs = 0x300f0080;
2307 u8 rt, tmp, tmp2, tmp3, out, flags;
2308 unsigned int i;
2309
2310 _jit_name(block->_jit, __func__);
2311
2312 if (state->state->ops.cop2_notify) {
2313 /* We must call cop2_notify, handle that in C. */
2314 rec_mfc(state, block, offset);
2315 return;
2316 }
2317
2318 flags = (zext_regs & BIT(reg)) ? REG_ZEXT : REG_EXT;
2319 rt = lightrec_alloc_reg_out(reg_cache, _jit, out_reg, flags);
2320
2321 if (reg == 15)
2322 reg = 14;
2323
2324 switch (reg) {
2325 case 1:
2326 case 3:
2327 case 5:
2328 case 8:
2329 case 9:
2330 case 10:
2331 case 11:
2332 jit_ldxi_s(rt, LIGHTREC_REG_STATE, cp2d_s_offset(reg));
2333 break;
2334 case 7:
2335 case 16:
2336 case 17:
2337 case 18:
2338 case 19:
2339 jit_ldxi_us(rt, LIGHTREC_REG_STATE, cp2d_s_offset(reg));
2340 break;
2341 case 28:
2342 case 29:
2343 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2344 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
2345 tmp3 = lightrec_alloc_reg_temp(reg_cache, _jit);
2346
2347 for (i = 0; i < 3; i++) {
2348 out = i == 0 ? rt : tmp;
2349
2350 jit_ldxi_s(tmp, LIGHTREC_REG_STATE, cp2d_s_offset(9 + i));
2351 jit_movi(tmp2, 0x1f);
2352 jit_rshi(out, tmp, 7);
2353
2354 jit_ltr(tmp3, tmp2, out);
2355 jit_movnr(out, tmp2, tmp3);
2356
2357 jit_gei(tmp2, out, 0);
2358 jit_movzr(out, tmp2, tmp2);
2359
2360 if (i > 0) {
2361 jit_lshi(tmp, tmp, 5 * i);
2362 jit_orr(rt, rt, tmp);
2363 }
2364 }
2365
2366
2367 lightrec_free_reg(reg_cache, tmp);
2368 lightrec_free_reg(reg_cache, tmp2);
2369 lightrec_free_reg(reg_cache, tmp3);
2370 break;
2371 default:
2372 jit_ldxi_i(rt, LIGHTREC_REG_STATE, cp2d_i_offset(reg));
2373 break;
2374 }
2375
2376 lightrec_free_reg(reg_cache, rt);
2377}
2378
2379static void rec_cp2_basic_MFC2(struct lightrec_cstate *state,
2380 const struct block *block, u16 offset)
2381{
2382 const union code c = block->opcode_list[offset].c;
2383
2384 rec_cp2_do_mfc2(state, block, offset, c.r.rd, c.r.rt);
2385}
2386
2387static void rec_cp2_basic_CFC2(struct lightrec_cstate *state,
2388 const struct block *block, u16 offset)
2389{
2390 struct regcache *reg_cache = state->reg_cache;
2391 const union code c = block->opcode_list[offset].c;
2392 jit_state_t *_jit = block->_jit;
2393 u8 rt;
2394
2395 _jit_name(block->_jit, __func__);
2396
2397 if (state->state->ops.cop2_notify) {
2398 /* We must call cop2_notify, handle that in C. */
2399 rec_mfc(state, block, offset);
2400 return;
2401 }
2402
2403 switch (c.r.rd) {
2404 case 4:
2405 case 12:
2406 case 20:
2407 case 26:
2408 case 27:
2409 case 29:
2410 case 30:
2411 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rt, REG_EXT);
2412 jit_ldxi_s(rt, LIGHTREC_REG_STATE, cp2c_s_offset(c.r.rd));
2413 break;
2414 default:
2415 rt = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rt, REG_ZEXT);
2416 jit_ldxi_ui(rt, LIGHTREC_REG_STATE, cp2c_i_offset(c.r.rd));
2417 break;
2418 }
2419
2420 lightrec_free_reg(reg_cache, rt);
2421}
2422
2423static void rec_cp2_do_mtc2(struct lightrec_cstate *state,
2424 const struct block *block, u16 offset,
2425 u8 reg, u8 in_reg)
2426{
2427 struct regcache *reg_cache = state->reg_cache;
2428 jit_state_t *_jit = block->_jit;
2429 u8 rt, tmp, tmp2, flags = 0;
2430
2431 _jit_name(block->_jit, __func__);
2432
2433 if (state->state->ops.cop2_notify) {
2434 /* We must call cop2_notify, handle that in C. */
2435 rec_mtc(state, block, offset);
2436 return;
2437 }
2438
2439 if (reg == 31)
2440 return;
2441
2442 if (reg == 30)
2443 flags |= REG_EXT;
2444
2445 rt = lightrec_alloc_reg_in(reg_cache, _jit, in_reg, flags);
2446
2447 switch (reg) {
2448 case 15:
2449 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2450 jit_ldxi_i(tmp, LIGHTREC_REG_STATE, cp2d_i_offset(13));
2451
2452 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
2453 jit_ldxi_i(tmp2, LIGHTREC_REG_STATE, cp2d_i_offset(14));
2454
2455 jit_stxi_i(cp2d_i_offset(12), LIGHTREC_REG_STATE, tmp);
2456 jit_stxi_i(cp2d_i_offset(13), LIGHTREC_REG_STATE, tmp2);
2457 jit_stxi_i(cp2d_i_offset(14), LIGHTREC_REG_STATE, rt);
2458
2459 lightrec_free_reg(reg_cache, tmp);
2460 lightrec_free_reg(reg_cache, tmp2);
2461 break;
2462 case 28:
2463 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2464
2465 jit_lshi(tmp, rt, 7);
2466 jit_andi(tmp, tmp, 0xf80);
2467 jit_stxi_s(cp2d_s_offset(9), LIGHTREC_REG_STATE, tmp);
2468
2469 jit_lshi(tmp, rt, 2);
2470 jit_andi(tmp, tmp, 0xf80);
2471 jit_stxi_s(cp2d_s_offset(10), LIGHTREC_REG_STATE, tmp);
2472
2473 jit_rshi(tmp, rt, 3);
2474 jit_andi(tmp, tmp, 0xf80);
2475 jit_stxi_s(cp2d_s_offset(11), LIGHTREC_REG_STATE, tmp);
2476
2477 lightrec_free_reg(reg_cache, tmp);
2478 break;
2479 case 30:
2480 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2481
2482 /* if (rt < 0) rt = ~rt; */
2483 jit_rshi(tmp, rt, 31);
2484 jit_xorr(tmp, rt, tmp);
2485
2486 /* Count leading zeros */
2487 jit_clzr(tmp, tmp);
2488 if (__WORDSIZE != 32)
2489 jit_subi(tmp, tmp, __WORDSIZE - 32);
2490
2491 jit_stxi_i(cp2d_i_offset(31), LIGHTREC_REG_STATE, tmp);
2492
2493 lightrec_free_reg(reg_cache, tmp);
2494 fallthrough;
2495 default:
2496 jit_stxi_i(cp2d_i_offset(reg), LIGHTREC_REG_STATE, rt);
2497 break;
2498 }
2499
2500 lightrec_free_reg(reg_cache, rt);
2501}
2502
2503static void rec_cp2_basic_MTC2(struct lightrec_cstate *state,
2504 const struct block *block, u16 offset)
2505{
2506 const union code c = block->opcode_list[offset].c;
2507
2508 rec_cp2_do_mtc2(state, block, offset, c.r.rd, c.r.rt);
2509}
2510
2511static void rec_cp2_basic_CTC2(struct lightrec_cstate *state,
2512 const struct block *block, u16 offset)
2513{
2514 struct regcache *reg_cache = state->reg_cache;
2515 const union code c = block->opcode_list[offset].c;
2516 jit_state_t *_jit = block->_jit;
2517 u8 rt, tmp, tmp2;
2518
2519 _jit_name(block->_jit, __func__);
2520
2521 if (state->state->ops.cop2_notify) {
2522 /* We must call cop2_notify, handle that in C. */
2523 rec_mtc(state, block, offset);
2524 return;
2525 }
2526
2527 rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, 0);
2528
2529 switch (c.r.rd) {
2530 case 4:
2531 case 12:
2532 case 20:
2533 case 26:
2534 case 27:
2535 case 29:
2536 case 30:
2537 jit_stxi_s(cp2c_s_offset(c.r.rd), LIGHTREC_REG_STATE, rt);
2538 break;
2539 case 31:
2540 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2541 tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit);
2542
2543 jit_andi(tmp, rt, 0x7f87e000);
2544 jit_nei(tmp, tmp, 0);
2545 jit_lshi(tmp, tmp, 31);
2546
2547 jit_andi(tmp2, rt, 0x7ffff000);
2548 jit_orr(tmp, tmp2, tmp);
2549
2550 jit_stxi_i(cp2c_i_offset(31), LIGHTREC_REG_STATE, tmp);
2551
2552 lightrec_free_reg(reg_cache, tmp);
2553 lightrec_free_reg(reg_cache, tmp2);
2554 break;
2555
2556 default:
2557 jit_stxi_i(cp2c_i_offset(c.r.rd), LIGHTREC_REG_STATE, rt);
2558 }
2559
2560 lightrec_free_reg(reg_cache, rt);
2561}
2562
2563static void rec_cp0_RFE(struct lightrec_cstate *state,
2564 const struct block *block, u16 offset)
2565{
2566 struct regcache *reg_cache = state->reg_cache;
2567 jit_state_t *_jit = block->_jit;
2568 u8 status, tmp;
2569
2570 jit_name(__func__);
2571 jit_note(__FILE__, __LINE__);
2572
2573 status = lightrec_alloc_reg_temp(reg_cache, _jit);
2574 jit_ldxi_i(status, LIGHTREC_REG_STATE, lightrec_offset(regs.cp0[12]));
2575
2576 tmp = lightrec_alloc_reg_temp(reg_cache, _jit);
2577
2578 /* status = ((status >> 2) & 0xf) | status & ~0xf; */
2579 jit_rshi(tmp, status, 2);
2580 jit_andi(tmp, tmp, 0xf);
2581 jit_andi(status, status, ~0xful);
2582 jit_orr(status, status, tmp);
2583
2584 jit_ldxi_i(tmp, LIGHTREC_REG_STATE, lightrec_offset(regs.cp0[13]));
2585 jit_stxi_i(lightrec_offset(regs.cp0[12]), LIGHTREC_REG_STATE, status);
2586
2587 /* Exit dynarec in case there's a software interrupt.
2588 * exit_flags = !!(status & cause & 0x0300) & status; */
2589 jit_andr(tmp, tmp, status);
2590 jit_andi(tmp, tmp, 0x0300);
2591 jit_nei(tmp, tmp, 0);
2592 jit_andr(tmp, tmp, status);
2593 jit_stxi_i(lightrec_offset(exit_flags), LIGHTREC_REG_STATE, tmp);
2594
2595 lightrec_free_reg(reg_cache, status);
2596 lightrec_free_reg(reg_cache, tmp);
2597}
2598
2599static void rec_CP(struct lightrec_cstate *state,
2600 const struct block *block, u16 offset)
2601{
2602 union code c = block->opcode_list[offset].c;
2603 jit_state_t *_jit = block->_jit;
2604
2605 jit_name(__func__);
2606 jit_note(__FILE__, __LINE__);
2607
2608 call_to_c_wrapper(state, block, c.opcode, C_WRAPPER_CP);
2609}
2610
2611static void rec_meta_MOV(struct lightrec_cstate *state,
2612 const struct block *block, u16 offset)
2613{
2614 struct regcache *reg_cache = state->reg_cache;
2615 const struct opcode *op = &block->opcode_list[offset];
2616 union code c = op->c;
2617 jit_state_t *_jit = block->_jit;
2618 bool unload_rd;
2619 bool unload_rs, discard_rs;
2620 u8 rs, rd;
2621
2622 _jit_name(block->_jit, __func__);
2623 jit_note(__FILE__, __LINE__);
2624
2625 unload_rs = OPT_EARLY_UNLOAD
2626 && LIGHTREC_FLAGS_GET_RS(op->flags) == LIGHTREC_REG_UNLOAD;
2627 discard_rs = OPT_EARLY_UNLOAD
2628 && LIGHTREC_FLAGS_GET_RS(op->flags) == LIGHTREC_REG_DISCARD;
2629
2630 if ((unload_rs || discard_rs) && c.m.rs) {
2631 /* If the source register is going to be unloaded or discarded,
2632 * then we can simply mark its host register as now pointing to
2633 * the destination register. */
2634 pr_debug("Remap %s to %s at offset 0x%x\n",
2635 lightrec_reg_name(c.m.rs), lightrec_reg_name(c.m.rd),
2636 offset << 2);
2637 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.m.rs, 0);
2638 lightrec_remap_reg(reg_cache, _jit, rs, c.m.rd, discard_rs);
2639 lightrec_free_reg(reg_cache, rs);
2640 return;
2641 }
2642
2643 unload_rd = OPT_EARLY_UNLOAD
2644 && LIGHTREC_FLAGS_GET_RD(op->flags) == LIGHTREC_REG_UNLOAD;
2645
2646 if (unload_rd) {
2647 /* If the destination register will be unloaded right after the
2648 * MOV meta-opcode, we don't actually need to write any host
2649 * register - we can just store the source register directly to
2650 * the register cache, at the offset corresponding to the
2651 * destination register. */
2652 lightrec_discard_reg_if_loaded(reg_cache, c.m.rd);
2653
2654 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.m.rs, 0);
2655
2656 jit_stxi_i(lightrec_offset(regs.gpr) + (c.m.rd << 2), LIGHTREC_REG_STATE, rs);
2657
2658 lightrec_free_reg(reg_cache, rs);
2659 } else {
2660 if (c.m.rs)
2661 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.m.rs, 0);
2662
2663 rd = lightrec_alloc_reg_out(reg_cache, _jit, c.m.rd, REG_EXT);
2664
2665 if (c.m.rs == 0) {
2666 jit_movi(rd, 0);
2667 } else {
2668 jit_extr_i(rd, rs);
2669 lightrec_free_reg(reg_cache, rs);
2670 }
2671
2672 lightrec_free_reg(reg_cache, rd);
2673 }
2674}
2675
2676static void rec_meta_EXTC_EXTS(struct lightrec_cstate *state,
2677 const struct block *block,
2678 u16 offset)
2679{
2680 struct regcache *reg_cache = state->reg_cache;
2681 union code c = block->opcode_list[offset].c;
2682 jit_state_t *_jit = block->_jit;
2683 u8 rs, rd;
2684
2685 _jit_name(block->_jit, __func__);
2686 jit_note(__FILE__, __LINE__);
2687
2688 rec_alloc_rs_rd(reg_cache, _jit, &block->opcode_list[offset],
2689 c.m.rs, c.m.rd, 0, REG_EXT, &rs, &rd);
2690
2691 if (c.m.op == OP_META_EXTC)
2692 jit_extr_c(rd, rs);
2693 else
2694 jit_extr_s(rd, rs);
2695
2696 lightrec_free_reg(reg_cache, rs);
2697 lightrec_free_reg(reg_cache, rd);
2698}
2699
2700static void rec_meta_MULT2(struct lightrec_cstate *state,
2701 const struct block *block,
2702 u16 offset)
2703{
2704 struct regcache *reg_cache = state->reg_cache;
2705 union code c = block->opcode_list[offset].c;
2706 jit_state_t *_jit = block->_jit;
2707 u8 reg_lo = get_mult_div_lo(c);
2708 u8 reg_hi = get_mult_div_hi(c);
2709 u32 flags = block->opcode_list[offset].flags;
2710 bool is_signed = c.i.op == OP_META_MULT2;
2711 u8 rs, lo, hi, rflags = 0, hiflags = 0;
2712 unsigned int i;
2713
2714 if (!op_flag_no_hi(flags) && c.r.op < 32) {
2715 rflags = is_signed ? REG_EXT : REG_ZEXT;
2716 hiflags = is_signed ? REG_EXT : (REG_EXT | REG_ZEXT);
2717 }
2718
2719 _jit_name(block->_jit, __func__);
2720 jit_note(__FILE__, __LINE__);
2721
2722 rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, rflags);
2723
2724 /*
2725 * We must handle the case where one of the output registers is our rs
2726 * input register. Thanksfully, computing LO/HI can be done in any
2727 * order. Here, we make sure that the computation that overwrites the
2728 * input register is always performed last.
2729 */
2730 for (i = 0; i < 2; i++) {
2731 if ((!i ^ (reg_lo == c.i.rs)) && !op_flag_no_lo(flags)) {
2732 lo = lightrec_alloc_reg_out(reg_cache, _jit, reg_lo, 0);
2733
2734 if (c.r.op < 32)
2735 jit_lshi(lo, rs, c.r.op);
2736 else
2737 jit_movi(lo, 0);
2738
2739 lightrec_free_reg(reg_cache, lo);
2740 continue;
2741 }
2742
2743 if ((!!i ^ (reg_lo == c.i.rs)) && !op_flag_no_hi(flags)) {
2744 hi = lightrec_alloc_reg_out(reg_cache, _jit,
2745 reg_hi, hiflags);
2746
2747 if (c.r.op >= 32) {
2748 jit_lshi(hi, rs, c.r.op - 32);
2749 } else if (is_signed) {
2750 if (c.r.op)
2751 jit_rshi(hi, rs, 32 - c.r.op);
2752 else
2753 jit_rshi(hi, rs, 31);
2754 } else {
2755 if (c.r.op)
2756 jit_rshi_u(hi, rs, 32 - c.r.op);
2757 else
2758 jit_movi(hi, 0);
2759 }
2760
2761 lightrec_free_reg(reg_cache, hi);
2762 }
2763 }
2764
2765 lightrec_free_reg(reg_cache, rs);
2766
2767 _jit_name(block->_jit, __func__);
2768 jit_note(__FILE__, __LINE__);
2769}
2770
2771static void rec_meta_COM(struct lightrec_cstate *state,
2772 const struct block *block, u16 offset)
2773{
2774 struct regcache *reg_cache = state->reg_cache;
2775 union code c = block->opcode_list[offset].c;
2776 jit_state_t *_jit = block->_jit;
2777 u8 rd, rs, flags;
2778
2779 jit_note(__FILE__, __LINE__);
2780
2781 rec_alloc_rs_rd(reg_cache, _jit, &block->opcode_list[offset],
2782 c.m.rs, c.m.rd, 0, 0, &rs, &rd);
2783
2784 flags = lightrec_get_reg_in_flags(reg_cache, rs);
2785
2786 lightrec_set_reg_out_flags(reg_cache, rd,
2787 flags & REG_EXT);
2788
2789 jit_comr(rd, rs);
2790
2791 lightrec_free_reg(reg_cache, rs);
2792 lightrec_free_reg(reg_cache, rd);
2793}
2794
2795static void rec_meta_LWU(struct lightrec_cstate *state,
2796 const struct block *block,
2797 u16 offset)
2798{
2799 jit_code_t code;
2800
2801 if (is_big_endian() && __WORDSIZE == 64)
2802 code = jit_code_unldr_u;
2803 else
2804 code = jit_code_unldr;
2805
2806 _jit_name(block->_jit, __func__);
2807 rec_load(state, block, offset, code, jit_code_bswapr_ui, false);
2808}
2809
2810static void rec_meta_SWU(struct lightrec_cstate *state,
2811 const struct block *block,
2812 u16 offset)
2813{
2814 _jit_name(block->_jit, __func__);
2815 rec_store(state, block, offset, jit_code_unstr, jit_code_bswapr_ui);
2816}
2817
2818static void unknown_opcode(struct lightrec_cstate *state,
2819 const struct block *block, u16 offset)
2820{
2821 rec_exit_early(state, block, offset, LIGHTREC_EXIT_UNKNOWN_OP,
2822 block->pc + (offset << 2));
2823}
2824
2825static const lightrec_rec_func_t rec_standard[64] = {
2826 SET_DEFAULT_ELM(rec_standard, unknown_opcode),
2827 [OP_SPECIAL] = rec_SPECIAL,
2828 [OP_REGIMM] = rec_REGIMM,
2829 [OP_J] = rec_J,
2830 [OP_JAL] = rec_JAL,
2831 [OP_BEQ] = rec_BEQ,
2832 [OP_BNE] = rec_BNE,
2833 [OP_BLEZ] = rec_BLEZ,
2834 [OP_BGTZ] = rec_BGTZ,
2835 [OP_ADDI] = rec_ADDI,
2836 [OP_ADDIU] = rec_ADDIU,
2837 [OP_SLTI] = rec_SLTI,
2838 [OP_SLTIU] = rec_SLTIU,
2839 [OP_ANDI] = rec_ANDI,
2840 [OP_ORI] = rec_ORI,
2841 [OP_XORI] = rec_XORI,
2842 [OP_LUI] = rec_LUI,
2843 [OP_CP0] = rec_CP0,
2844 [OP_CP2] = rec_CP2,
2845 [OP_LB] = rec_LB,
2846 [OP_LH] = rec_LH,
2847 [OP_LWL] = rec_LWL,
2848 [OP_LW] = rec_LW,
2849 [OP_LBU] = rec_LBU,
2850 [OP_LHU] = rec_LHU,
2851 [OP_LWR] = rec_LWR,
2852 [OP_SB] = rec_SB,
2853 [OP_SH] = rec_SH,
2854 [OP_SWL] = rec_SWL,
2855 [OP_SW] = rec_SW,
2856 [OP_SWR] = rec_SWR,
2857 [OP_LWC2] = rec_LW,
2858 [OP_SWC2] = rec_SW,
2859
2860 [OP_META] = rec_META,
2861 [OP_META_MULT2] = rec_meta_MULT2,
2862 [OP_META_MULTU2] = rec_meta_MULT2,
2863 [OP_META_LWU] = rec_meta_LWU,
2864 [OP_META_SWU] = rec_meta_SWU,
2865};
2866
2867static const lightrec_rec_func_t rec_special[64] = {
2868 SET_DEFAULT_ELM(rec_special, unknown_opcode),
2869 [OP_SPECIAL_SLL] = rec_special_SLL,
2870 [OP_SPECIAL_SRL] = rec_special_SRL,
2871 [OP_SPECIAL_SRA] = rec_special_SRA,
2872 [OP_SPECIAL_SLLV] = rec_special_SLLV,
2873 [OP_SPECIAL_SRLV] = rec_special_SRLV,
2874 [OP_SPECIAL_SRAV] = rec_special_SRAV,
2875 [OP_SPECIAL_JR] = rec_special_JR,
2876 [OP_SPECIAL_JALR] = rec_special_JALR,
2877 [OP_SPECIAL_SYSCALL] = rec_special_SYSCALL,
2878 [OP_SPECIAL_BREAK] = rec_special_BREAK,
2879 [OP_SPECIAL_MFHI] = rec_special_MFHI,
2880 [OP_SPECIAL_MTHI] = rec_special_MTHI,
2881 [OP_SPECIAL_MFLO] = rec_special_MFLO,
2882 [OP_SPECIAL_MTLO] = rec_special_MTLO,
2883 [OP_SPECIAL_MULT] = rec_special_MULT,
2884 [OP_SPECIAL_MULTU] = rec_special_MULTU,
2885 [OP_SPECIAL_DIV] = rec_special_DIV,
2886 [OP_SPECIAL_DIVU] = rec_special_DIVU,
2887 [OP_SPECIAL_ADD] = rec_special_ADD,
2888 [OP_SPECIAL_ADDU] = rec_special_ADDU,
2889 [OP_SPECIAL_SUB] = rec_special_SUB,
2890 [OP_SPECIAL_SUBU] = rec_special_SUBU,
2891 [OP_SPECIAL_AND] = rec_special_AND,
2892 [OP_SPECIAL_OR] = rec_special_OR,
2893 [OP_SPECIAL_XOR] = rec_special_XOR,
2894 [OP_SPECIAL_NOR] = rec_special_NOR,
2895 [OP_SPECIAL_SLT] = rec_special_SLT,
2896 [OP_SPECIAL_SLTU] = rec_special_SLTU,
2897};
2898
2899static const lightrec_rec_func_t rec_regimm[64] = {
2900 SET_DEFAULT_ELM(rec_regimm, unknown_opcode),
2901 [OP_REGIMM_BLTZ] = rec_regimm_BLTZ,
2902 [OP_REGIMM_BGEZ] = rec_regimm_BGEZ,
2903 [OP_REGIMM_BLTZAL] = rec_regimm_BLTZAL,
2904 [OP_REGIMM_BGEZAL] = rec_regimm_BGEZAL,
2905};
2906
2907static const lightrec_rec_func_t rec_cp0[64] = {
2908 SET_DEFAULT_ELM(rec_cp0, rec_CP),
2909 [OP_CP0_MFC0] = rec_cp0_MFC0,
2910 [OP_CP0_CFC0] = rec_cp0_CFC0,
2911 [OP_CP0_MTC0] = rec_cp0_MTC0,
2912 [OP_CP0_CTC0] = rec_cp0_CTC0,
2913 [OP_CP0_RFE] = rec_cp0_RFE,
2914};
2915
2916static const lightrec_rec_func_t rec_cp2_basic[64] = {
2917 SET_DEFAULT_ELM(rec_cp2_basic, rec_CP),
2918 [OP_CP2_BASIC_MFC2] = rec_cp2_basic_MFC2,
2919 [OP_CP2_BASIC_CFC2] = rec_cp2_basic_CFC2,
2920 [OP_CP2_BASIC_MTC2] = rec_cp2_basic_MTC2,
2921 [OP_CP2_BASIC_CTC2] = rec_cp2_basic_CTC2,
2922};
2923
2924static const lightrec_rec_func_t rec_meta[64] = {
2925 SET_DEFAULT_ELM(rec_meta, unknown_opcode),
2926 [OP_META_MOV] = rec_meta_MOV,
2927 [OP_META_EXTC] = rec_meta_EXTC_EXTS,
2928 [OP_META_EXTS] = rec_meta_EXTC_EXTS,
2929 [OP_META_COM] = rec_meta_COM,
2930};
2931
2932static void rec_SPECIAL(struct lightrec_cstate *state,
2933 const struct block *block, u16 offset)
2934{
2935 union code c = block->opcode_list[offset].c;
2936 lightrec_rec_func_t f = rec_special[c.r.op];
2937
2938 if (!HAS_DEFAULT_ELM && unlikely(!f))
2939 unknown_opcode(state, block, offset);
2940 else
2941 (*f)(state, block, offset);
2942}
2943
2944static void rec_REGIMM(struct lightrec_cstate *state,
2945 const struct block *block, u16 offset)
2946{
2947 union code c = block->opcode_list[offset].c;
2948 lightrec_rec_func_t f = rec_regimm[c.r.rt];
2949
2950 if (!HAS_DEFAULT_ELM && unlikely(!f))
2951 unknown_opcode(state, block, offset);
2952 else
2953 (*f)(state, block, offset);
2954}
2955
2956static void rec_CP0(struct lightrec_cstate *state,
2957 const struct block *block, u16 offset)
2958{
2959 union code c = block->opcode_list[offset].c;
2960 lightrec_rec_func_t f = rec_cp0[c.r.rs];
2961
2962 if (!HAS_DEFAULT_ELM && unlikely(!f))
2963 rec_CP(state, block, offset);
2964 else
2965 (*f)(state, block, offset);
2966}
2967
2968static void rec_CP2(struct lightrec_cstate *state,
2969 const struct block *block, u16 offset)
2970{
2971 union code c = block->opcode_list[offset].c;
2972
2973 if (c.r.op == OP_CP2_BASIC) {
2974 lightrec_rec_func_t f = rec_cp2_basic[c.r.rs];
2975
2976 if (HAS_DEFAULT_ELM || likely(f)) {
2977 (*f)(state, block, offset);
2978 return;
2979 }
2980 }
2981
2982 rec_CP(state, block, offset);
2983}
2984
2985static void rec_META(struct lightrec_cstate *state,
2986 const struct block *block, u16 offset)
2987{
2988 union code c = block->opcode_list[offset].c;
2989 lightrec_rec_func_t f = rec_meta[c.m.op];
2990
2991 if (!HAS_DEFAULT_ELM && unlikely(!f))
2992 unknown_opcode(state, block, offset);
2993 else
2994 (*f)(state, block, offset);
2995}
2996
2997void lightrec_rec_opcode(struct lightrec_cstate *state,
2998 const struct block *block, u16 offset)
2999{
3000 struct regcache *reg_cache = state->reg_cache;
3001 struct lightrec_branch_target *target;
3002 const struct opcode *op = &block->opcode_list[offset];
3003 jit_state_t *_jit = block->_jit;
3004 lightrec_rec_func_t f;
3005 u16 unload_offset;
3006
3007 if (op_flag_sync(op->flags)) {
3008 if (state->cycles)
3009 jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, state->cycles);
3010 state->cycles = 0;
3011
3012 lightrec_storeback_regs(reg_cache, _jit);
3013 lightrec_regcache_reset(reg_cache);
3014
3015 pr_debug("Adding branch target at offset 0x%x\n", offset << 2);
3016 target = &state->targets[state->nb_targets++];
3017 target->offset = offset;
3018 target->label = jit_indirect();
3019 }
3020
3021 if (likely(op->opcode)) {
3022 f = rec_standard[op->i.op];
3023
3024 if (!HAS_DEFAULT_ELM && unlikely(!f))
3025 unknown_opcode(state, block, offset);
3026 else
3027 (*f)(state, block, offset);
3028 }
3029
3030 if (OPT_EARLY_UNLOAD) {
3031 unload_offset = offset +
3032 (has_delay_slot(op->c) && !op_flag_no_ds(op->flags));
3033
3034 lightrec_do_early_unload(state, block, unload_offset);
3035 }
3036
3037 state->no_load_delay = false;
3038}
ARM optimized PCSX fork