| 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 | typedef void (*lightrec_rec_func_t)(struct lightrec_cstate *, const struct block *, u16); |
| 18 | |
| 19 | /* Forward declarations */ |
| 20 | static void rec_SPECIAL(struct lightrec_cstate *state, const struct block *block, u16 offset); |
| 21 | static void rec_REGIMM(struct lightrec_cstate *state, const struct block *block, u16 offset); |
| 22 | static void rec_CP0(struct lightrec_cstate *state, const struct block *block, u16 offset); |
| 23 | static void rec_CP2(struct lightrec_cstate *state, const struct block *block, u16 offset); |
| 24 | static void rec_META(struct lightrec_cstate *state, const struct block *block, u16 offset); |
| 25 | static void rec_cp2_do_mtc2(struct lightrec_cstate *state, |
| 26 | const struct block *block, u16 offset, u8 reg, u8 in_reg); |
| 27 | static void rec_cp2_do_mfc2(struct lightrec_cstate *state, |
| 28 | const struct block *block, u16 offset, |
| 29 | u8 reg, u8 out_reg); |
| 30 | |
| 31 | static void unknown_opcode(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 32 | { |
| 33 | pr_warn("Unknown opcode: 0x%08x at PC 0x%08x\n", |
| 34 | block->opcode_list[offset].c.opcode, |
| 35 | block->pc + (offset << 2)); |
| 36 | } |
| 37 | |
| 38 | static void |
| 39 | lightrec_jump_to_fn(jit_state_t *_jit, void (*fn)(void)) |
| 40 | { |
| 41 | /* Prevent jit_jmpi() from using our cycles register as a temporary */ |
| 42 | jit_live(LIGHTREC_REG_CYCLE); |
| 43 | |
| 44 | jit_patch_abs(jit_jmpi(), fn); |
| 45 | } |
| 46 | |
| 47 | static void |
| 48 | lightrec_jump_to_eob(struct lightrec_cstate *state, jit_state_t *_jit) |
| 49 | { |
| 50 | lightrec_jump_to_fn(_jit, state->state->eob_wrapper_func); |
| 51 | } |
| 52 | |
| 53 | static void |
| 54 | lightrec_jump_to_ds_check(struct lightrec_cstate *state, jit_state_t *_jit) |
| 55 | { |
| 56 | lightrec_jump_to_fn(_jit, state->state->ds_check_func); |
| 57 | } |
| 58 | |
| 59 | static void update_ra_register(struct regcache *reg_cache, jit_state_t *_jit, |
| 60 | u8 ra_reg, u32 pc, u32 link) |
| 61 | { |
| 62 | u8 link_reg; |
| 63 | |
| 64 | link_reg = lightrec_alloc_reg_out(reg_cache, _jit, ra_reg, 0); |
| 65 | lightrec_load_imm(reg_cache, _jit, link_reg, pc, link); |
| 66 | lightrec_free_reg(reg_cache, link_reg); |
| 67 | } |
| 68 | |
| 69 | static void lightrec_emit_end_of_block(struct lightrec_cstate *state, |
| 70 | const struct block *block, u16 offset, |
| 71 | s8 reg_new_pc, u32 imm, u8 ra_reg, |
| 72 | u32 link, bool update_cycles) |
| 73 | { |
| 74 | struct regcache *reg_cache = state->reg_cache; |
| 75 | jit_state_t *_jit = block->_jit; |
| 76 | const struct opcode *op = &block->opcode_list[offset], |
| 77 | *ds = get_delay_slot(block->opcode_list, offset); |
| 78 | u32 cycles = state->cycles + lightrec_cycles_of_opcode(op->c); |
| 79 | |
| 80 | jit_note(__FILE__, __LINE__); |
| 81 | |
| 82 | if (link && ra_reg != reg_new_pc) |
| 83 | update_ra_register(reg_cache, _jit, ra_reg, block->pc, link); |
| 84 | |
| 85 | if (reg_new_pc < 0) |
| 86 | lightrec_load_next_pc_imm(reg_cache, _jit, block->pc, imm); |
| 87 | else |
| 88 | lightrec_load_next_pc(reg_cache, _jit, reg_new_pc); |
| 89 | |
| 90 | if (link && ra_reg == reg_new_pc) { |
| 91 | /* Handle the special case: JALR $r0, $r0 |
| 92 | * In that case the target PC should be the old value of the |
| 93 | * register. */ |
| 94 | update_ra_register(reg_cache, _jit, ra_reg, block->pc, link); |
| 95 | } |
| 96 | |
| 97 | if (has_delay_slot(op->c) && |
| 98 | !op_flag_no_ds(op->flags) && !op_flag_local_branch(op->flags)) { |
| 99 | cycles += lightrec_cycles_of_opcode(ds->c); |
| 100 | |
| 101 | /* Recompile the delay slot */ |
| 102 | if (ds->c.opcode) |
| 103 | lightrec_rec_opcode(state, block, offset + 1); |
| 104 | } |
| 105 | |
| 106 | /* Clean the remaining registers */ |
| 107 | lightrec_clean_regs(reg_cache, _jit); |
| 108 | |
| 109 | if (cycles && update_cycles) { |
| 110 | jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, cycles); |
| 111 | pr_debug("EOB: %u cycles\n", cycles); |
| 112 | } |
| 113 | |
| 114 | if (op_flag_load_delay(ds->flags) |
| 115 | && opcode_is_load(ds->c) && !state->no_load_delay) { |
| 116 | /* If the delay slot is a load opcode, its target register |
| 117 | * will be written after the first opcode of the target is |
| 118 | * executed. Handle this by jumping to a special section of |
| 119 | * the dispatcher. It expects the loaded value to be in |
| 120 | * REG_TEMP, and the target register number to be in JIT_V1.*/ |
| 121 | jit_movi(JIT_V1, ds->c.i.rt); |
| 122 | |
| 123 | lightrec_jump_to_ds_check(state, _jit); |
| 124 | } else { |
| 125 | lightrec_jump_to_eob(state, _jit); |
| 126 | } |
| 127 | |
| 128 | lightrec_regcache_reset(reg_cache); |
| 129 | } |
| 130 | |
| 131 | void lightrec_emit_jump_to_interpreter(struct lightrec_cstate *state, |
| 132 | const struct block *block, u16 offset) |
| 133 | { |
| 134 | struct regcache *reg_cache = state->reg_cache; |
| 135 | jit_state_t *_jit = block->_jit; |
| 136 | |
| 137 | lightrec_clean_regs(reg_cache, _jit); |
| 138 | |
| 139 | /* Call the interpreter with the block's address in JIT_V1 and the |
| 140 | * PC (which might have an offset) in JIT_V0. */ |
| 141 | lightrec_load_imm(reg_cache, _jit, JIT_V0, block->pc, |
| 142 | block->pc + (offset << 2)); |
| 143 | if (lightrec_store_next_pc()) { |
| 144 | jit_stxi_i(offsetof(struct lightrec_state, next_pc), |
| 145 | LIGHTREC_REG_STATE, JIT_V0); |
| 146 | } |
| 147 | |
| 148 | jit_movi(JIT_V1, (uintptr_t)block); |
| 149 | |
| 150 | jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, state->cycles); |
| 151 | lightrec_jump_to_fn(_jit, state->state->interpreter_func); |
| 152 | } |
| 153 | |
| 154 | static void lightrec_emit_eob(struct lightrec_cstate *state, |
| 155 | const struct block *block, u16 offset) |
| 156 | { |
| 157 | struct regcache *reg_cache = state->reg_cache; |
| 158 | jit_state_t *_jit = block->_jit; |
| 159 | |
| 160 | lightrec_clean_regs(reg_cache, _jit); |
| 161 | |
| 162 | lightrec_load_imm(reg_cache, _jit, JIT_V0, block->pc, |
| 163 | block->pc + (offset << 2)); |
| 164 | if (lightrec_store_next_pc()) { |
| 165 | jit_stxi_i(offsetof(struct lightrec_state, next_pc), |
| 166 | LIGHTREC_REG_STATE, JIT_V0); |
| 167 | } |
| 168 | |
| 169 | jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, state->cycles); |
| 170 | |
| 171 | lightrec_jump_to_eob(state, _jit); |
| 172 | } |
| 173 | |
| 174 | static void rec_special_JR(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 175 | { |
| 176 | union code c = block->opcode_list[offset].c; |
| 177 | |
| 178 | _jit_name(block->_jit, __func__); |
| 179 | lightrec_emit_end_of_block(state, block, offset, c.r.rs, 0, 31, 0, true); |
| 180 | } |
| 181 | |
| 182 | static void rec_special_JALR(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 183 | { |
| 184 | union code c = block->opcode_list[offset].c; |
| 185 | |
| 186 | _jit_name(block->_jit, __func__); |
| 187 | lightrec_emit_end_of_block(state, block, offset, c.r.rs, 0, c.r.rd, |
| 188 | get_branch_pc(block, offset, 2), true); |
| 189 | } |
| 190 | |
| 191 | static void rec_J(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 192 | { |
| 193 | union code c = block->opcode_list[offset].c; |
| 194 | |
| 195 | _jit_name(block->_jit, __func__); |
| 196 | lightrec_emit_end_of_block(state, block, offset, -1, |
| 197 | (block->pc & 0xf0000000) | (c.j.imm << 2), |
| 198 | 31, 0, true); |
| 199 | } |
| 200 | |
| 201 | static void rec_JAL(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 202 | { |
| 203 | union code c = block->opcode_list[offset].c; |
| 204 | |
| 205 | _jit_name(block->_jit, __func__); |
| 206 | lightrec_emit_end_of_block(state, block, offset, -1, |
| 207 | (block->pc & 0xf0000000) | (c.j.imm << 2), |
| 208 | 31, get_branch_pc(block, offset, 2), true); |
| 209 | } |
| 210 | |
| 211 | static void lightrec_do_early_unload(struct lightrec_cstate *state, |
| 212 | const struct block *block, u16 offset) |
| 213 | { |
| 214 | struct regcache *reg_cache = state->reg_cache; |
| 215 | const struct opcode *op = &block->opcode_list[offset]; |
| 216 | jit_state_t *_jit = block->_jit; |
| 217 | unsigned int i; |
| 218 | u8 reg; |
| 219 | struct { |
| 220 | u8 reg, op; |
| 221 | } reg_ops[3] = { |
| 222 | { op->r.rd, LIGHTREC_FLAGS_GET_RD(op->flags), }, |
| 223 | { op->i.rt, LIGHTREC_FLAGS_GET_RT(op->flags), }, |
| 224 | { op->i.rs, LIGHTREC_FLAGS_GET_RS(op->flags), }, |
| 225 | }; |
| 226 | |
| 227 | for (i = 0; i < ARRAY_SIZE(reg_ops); i++) { |
| 228 | reg = reg_ops[i].reg; |
| 229 | |
| 230 | switch (reg_ops[i].op) { |
| 231 | case LIGHTREC_REG_UNLOAD: |
| 232 | lightrec_clean_reg_if_loaded(reg_cache, _jit, reg, true); |
| 233 | break; |
| 234 | |
| 235 | case LIGHTREC_REG_DISCARD: |
| 236 | lightrec_discard_reg_if_loaded(reg_cache, reg); |
| 237 | break; |
| 238 | |
| 239 | case LIGHTREC_REG_CLEAN: |
| 240 | lightrec_clean_reg_if_loaded(reg_cache, _jit, reg, false); |
| 241 | break; |
| 242 | default: |
| 243 | break; |
| 244 | }; |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | static void rec_b(struct lightrec_cstate *state, const struct block *block, u16 offset, |
| 249 | jit_code_t code, jit_code_t code2, u32 link, bool unconditional, bool bz) |
| 250 | { |
| 251 | struct regcache *reg_cache = state->reg_cache; |
| 252 | struct native_register *regs_backup; |
| 253 | jit_state_t *_jit = block->_jit; |
| 254 | struct lightrec_branch *branch; |
| 255 | const struct opcode *op = &block->opcode_list[offset], |
| 256 | *ds = get_delay_slot(block->opcode_list, offset); |
| 257 | jit_node_t *addr; |
| 258 | bool is_forward = (s16)op->i.imm >= 0; |
| 259 | int op_cycles = lightrec_cycles_of_opcode(op->c); |
| 260 | u32 target_offset, cycles = state->cycles + op_cycles; |
| 261 | bool no_indirection = false; |
| 262 | u32 next_pc; |
| 263 | u8 rs, rt; |
| 264 | |
| 265 | jit_note(__FILE__, __LINE__); |
| 266 | |
| 267 | if (!op_flag_no_ds(op->flags)) |
| 268 | cycles += lightrec_cycles_of_opcode(ds->c); |
| 269 | |
| 270 | state->cycles = -op_cycles; |
| 271 | |
| 272 | if (!unconditional) { |
| 273 | rs = lightrec_alloc_reg_in(reg_cache, _jit, op->i.rs, REG_EXT); |
| 274 | rt = bz ? 0 : lightrec_alloc_reg_in(reg_cache, |
| 275 | _jit, op->i.rt, REG_EXT); |
| 276 | |
| 277 | /* Unload dead registers before evaluating the branch */ |
| 278 | if (OPT_EARLY_UNLOAD) |
| 279 | lightrec_do_early_unload(state, block, offset); |
| 280 | |
| 281 | if (op_flag_local_branch(op->flags) && |
| 282 | (op_flag_no_ds(op->flags) || !ds->opcode) && |
| 283 | is_forward && !lightrec_has_dirty_regs(reg_cache)) |
| 284 | no_indirection = true; |
| 285 | |
| 286 | if (no_indirection) |
| 287 | pr_debug("Using no indirection for branch at offset 0x%hx\n", offset << 2); |
| 288 | } |
| 289 | |
| 290 | if (cycles) |
| 291 | jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, cycles); |
| 292 | |
| 293 | if (!unconditional) { |
| 294 | /* Generate the branch opcode */ |
| 295 | if (!no_indirection) |
| 296 | addr = jit_new_node_pww(code, NULL, rs, rt); |
| 297 | |
| 298 | lightrec_free_regs(reg_cache); |
| 299 | regs_backup = lightrec_regcache_enter_branch(reg_cache); |
| 300 | } |
| 301 | |
| 302 | if (op_flag_local_branch(op->flags)) { |
| 303 | /* Recompile the delay slot */ |
| 304 | if (!op_flag_no_ds(op->flags) && ds->opcode) { |
| 305 | /* Never handle load delays with local branches. */ |
| 306 | state->no_load_delay = true; |
| 307 | lightrec_rec_opcode(state, block, offset + 1); |
| 308 | } |
| 309 | |
| 310 | if (link) |
| 311 | update_ra_register(reg_cache, _jit, 31, block->pc, link); |
| 312 | |
| 313 | /* Clean remaining registers */ |
| 314 | lightrec_clean_regs(reg_cache, _jit); |
| 315 | |
| 316 | target_offset = offset + 1 + (s16)op->i.imm |
| 317 | - !!op_flag_no_ds(op->flags); |
| 318 | pr_debug("Adding local branch to offset 0x%x\n", |
| 319 | target_offset << 2); |
| 320 | branch = &state->local_branches[ |
| 321 | state->nb_local_branches++]; |
| 322 | |
| 323 | branch->target = target_offset; |
| 324 | |
| 325 | if (no_indirection) |
| 326 | branch->branch = jit_new_node_pww(code2, NULL, rs, rt); |
| 327 | else if (is_forward) |
| 328 | branch->branch = jit_b(); |
| 329 | else |
| 330 | branch->branch = jit_bgti(LIGHTREC_REG_CYCLE, 0); |
| 331 | } |
| 332 | |
| 333 | if (!op_flag_local_branch(op->flags) || !is_forward) { |
| 334 | next_pc = get_branch_pc(block, offset, 1 + (s16)op->i.imm); |
| 335 | state->no_load_delay = op_flag_local_branch(op->flags); |
| 336 | lightrec_emit_end_of_block(state, block, offset, -1, next_pc, |
| 337 | 31, link, false); |
| 338 | } |
| 339 | |
| 340 | if (!unconditional) { |
| 341 | if (!no_indirection) |
| 342 | jit_patch(addr); |
| 343 | |
| 344 | lightrec_regcache_leave_branch(reg_cache, regs_backup); |
| 345 | |
| 346 | if (bz && link) |
| 347 | update_ra_register(reg_cache, _jit, 31, block->pc, link); |
| 348 | |
| 349 | if (!op_flag_no_ds(op->flags) && ds->opcode) { |
| 350 | state->no_load_delay = true; |
| 351 | lightrec_rec_opcode(state, block, offset + 1); |
| 352 | } |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | static void rec_BNE(struct lightrec_cstate *state, |
| 357 | const struct block *block, u16 offset) |
| 358 | { |
| 359 | union code c = block->opcode_list[offset].c; |
| 360 | |
| 361 | _jit_name(block->_jit, __func__); |
| 362 | |
| 363 | if (c.i.rt == 0) |
| 364 | rec_b(state, block, offset, jit_code_beqi, jit_code_bnei, 0, false, true); |
| 365 | else |
| 366 | rec_b(state, block, offset, jit_code_beqr, jit_code_bner, 0, false, false); |
| 367 | } |
| 368 | |
| 369 | static void rec_BEQ(struct lightrec_cstate *state, |
| 370 | const struct block *block, u16 offset) |
| 371 | { |
| 372 | union code c = block->opcode_list[offset].c; |
| 373 | |
| 374 | _jit_name(block->_jit, __func__); |
| 375 | |
| 376 | if (c.i.rt == 0) |
| 377 | rec_b(state, block, offset, jit_code_bnei, jit_code_beqi, 0, c.i.rs == 0, true); |
| 378 | else |
| 379 | rec_b(state, block, offset, jit_code_bner, jit_code_beqr, 0, c.i.rs == c.i.rt, false); |
| 380 | } |
| 381 | |
| 382 | static void rec_BLEZ(struct lightrec_cstate *state, |
| 383 | const struct block *block, u16 offset) |
| 384 | { |
| 385 | union code c = block->opcode_list[offset].c; |
| 386 | |
| 387 | _jit_name(block->_jit, __func__); |
| 388 | rec_b(state, block, offset, jit_code_bgti, jit_code_blei, 0, c.i.rs == 0, true); |
| 389 | } |
| 390 | |
| 391 | static void rec_BGTZ(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_blei, jit_code_bgti, 0, false, true); |
| 396 | } |
| 397 | |
| 398 | static void rec_regimm_BLTZ(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, 0, false, true); |
| 403 | } |
| 404 | |
| 405 | static void rec_regimm_BLTZAL(struct lightrec_cstate *state, |
| 406 | const struct block *block, u16 offset) |
| 407 | { |
| 408 | _jit_name(block->_jit, __func__); |
| 409 | rec_b(state, block, offset, jit_code_bgei, jit_code_blti, |
| 410 | get_branch_pc(block, offset, 2), false, true); |
| 411 | } |
| 412 | |
| 413 | static void rec_regimm_BGEZ(struct lightrec_cstate *state, |
| 414 | const struct block *block, u16 offset) |
| 415 | { |
| 416 | union code c = block->opcode_list[offset].c; |
| 417 | |
| 418 | _jit_name(block->_jit, __func__); |
| 419 | rec_b(state, block, offset, jit_code_blti, jit_code_bgei, 0, !c.i.rs, true); |
| 420 | } |
| 421 | |
| 422 | static void rec_regimm_BGEZAL(struct lightrec_cstate *state, |
| 423 | const struct block *block, u16 offset) |
| 424 | { |
| 425 | const struct opcode *op = &block->opcode_list[offset]; |
| 426 | _jit_name(block->_jit, __func__); |
| 427 | rec_b(state, block, offset, jit_code_blti, jit_code_bgei, |
| 428 | get_branch_pc(block, offset, 2), |
| 429 | !op->i.rs, true); |
| 430 | } |
| 431 | |
| 432 | static void rec_alu_imm(struct lightrec_cstate *state, const struct block *block, |
| 433 | u16 offset, jit_code_t code, bool slti) |
| 434 | { |
| 435 | struct regcache *reg_cache = state->reg_cache; |
| 436 | union code c = block->opcode_list[offset].c; |
| 437 | jit_state_t *_jit = block->_jit; |
| 438 | u8 rs, rt, out_flags = REG_EXT; |
| 439 | |
| 440 | if (slti) |
| 441 | out_flags |= REG_ZEXT; |
| 442 | |
| 443 | jit_note(__FILE__, __LINE__); |
| 444 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, REG_EXT); |
| 445 | rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, out_flags); |
| 446 | |
| 447 | jit_new_node_www(code, rt, rs, (s32)(s16) c.i.imm); |
| 448 | |
| 449 | lightrec_free_reg(reg_cache, rs); |
| 450 | lightrec_free_reg(reg_cache, rt); |
| 451 | } |
| 452 | |
| 453 | static void rec_alu_special(struct lightrec_cstate *state, const struct block *block, |
| 454 | u16 offset, jit_code_t code, bool out_ext) |
| 455 | { |
| 456 | struct regcache *reg_cache = state->reg_cache; |
| 457 | union code c = block->opcode_list[offset].c; |
| 458 | jit_state_t *_jit = block->_jit; |
| 459 | u8 rd, rt, rs; |
| 460 | |
| 461 | jit_note(__FILE__, __LINE__); |
| 462 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, REG_EXT); |
| 463 | rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, REG_EXT); |
| 464 | rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd, |
| 465 | out_ext ? REG_EXT | REG_ZEXT : 0); |
| 466 | |
| 467 | jit_new_node_www(code, rd, rs, rt); |
| 468 | |
| 469 | lightrec_free_reg(reg_cache, rs); |
| 470 | lightrec_free_reg(reg_cache, rt); |
| 471 | lightrec_free_reg(reg_cache, rd); |
| 472 | } |
| 473 | |
| 474 | static void rec_alu_shiftv(struct lightrec_cstate *state, const struct block *block, |
| 475 | u16 offset, jit_code_t code) |
| 476 | { |
| 477 | struct regcache *reg_cache = state->reg_cache; |
| 478 | union code c = block->opcode_list[offset].c; |
| 479 | jit_state_t *_jit = block->_jit; |
| 480 | u8 rd, rt, rs, temp, flags = 0; |
| 481 | |
| 482 | jit_note(__FILE__, __LINE__); |
| 483 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, 0); |
| 484 | |
| 485 | if (code == jit_code_rshr) |
| 486 | flags = REG_EXT; |
| 487 | else if (code == jit_code_rshr_u) |
| 488 | flags = REG_ZEXT; |
| 489 | |
| 490 | rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, flags); |
| 491 | rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd, flags); |
| 492 | |
| 493 | if (rs != rd && rt != rd) { |
| 494 | jit_andi(rd, rs, 0x1f); |
| 495 | jit_new_node_www(code, rd, rt, rd); |
| 496 | } else { |
| 497 | temp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 498 | jit_andi(temp, rs, 0x1f); |
| 499 | jit_new_node_www(code, rd, rt, temp); |
| 500 | lightrec_free_reg(reg_cache, temp); |
| 501 | } |
| 502 | |
| 503 | lightrec_free_reg(reg_cache, rs); |
| 504 | lightrec_free_reg(reg_cache, rt); |
| 505 | lightrec_free_reg(reg_cache, rd); |
| 506 | } |
| 507 | |
| 508 | static void rec_movi(struct lightrec_cstate *state, |
| 509 | const struct block *block, u16 offset) |
| 510 | { |
| 511 | struct regcache *reg_cache = state->reg_cache; |
| 512 | union code c = block->opcode_list[offset].c; |
| 513 | jit_state_t *_jit = block->_jit; |
| 514 | u16 flags = REG_EXT; |
| 515 | u8 rt; |
| 516 | |
| 517 | if (!(c.i.imm & 0x8000)) |
| 518 | flags |= REG_ZEXT; |
| 519 | |
| 520 | rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, flags); |
| 521 | |
| 522 | jit_movi(rt, (s32)(s16) c.i.imm); |
| 523 | |
| 524 | lightrec_free_reg(reg_cache, rt); |
| 525 | } |
| 526 | |
| 527 | static void rec_ADDIU(struct lightrec_cstate *state, |
| 528 | const struct block *block, u16 offset) |
| 529 | { |
| 530 | _jit_name(block->_jit, __func__); |
| 531 | |
| 532 | if (block->opcode_list[offset].c.i.rs) |
| 533 | rec_alu_imm(state, block, offset, jit_code_addi, false); |
| 534 | else |
| 535 | rec_movi(state, block, offset); |
| 536 | } |
| 537 | |
| 538 | static void rec_ADDI(struct lightrec_cstate *state, |
| 539 | const struct block *block, u16 offset) |
| 540 | { |
| 541 | /* TODO: Handle the exception? */ |
| 542 | _jit_name(block->_jit, __func__); |
| 543 | rec_ADDIU(state, block, offset); |
| 544 | } |
| 545 | |
| 546 | static void rec_SLTIU(struct lightrec_cstate *state, |
| 547 | const struct block *block, u16 offset) |
| 548 | { |
| 549 | _jit_name(block->_jit, __func__); |
| 550 | rec_alu_imm(state, block, offset, jit_code_lti_u, true); |
| 551 | } |
| 552 | |
| 553 | static void rec_SLTI(struct lightrec_cstate *state, |
| 554 | const struct block *block, u16 offset) |
| 555 | { |
| 556 | _jit_name(block->_jit, __func__); |
| 557 | rec_alu_imm(state, block, offset, jit_code_lti, true); |
| 558 | } |
| 559 | |
| 560 | static void rec_ANDI(struct lightrec_cstate *state, |
| 561 | const struct block *block, u16 offset) |
| 562 | { |
| 563 | struct regcache *reg_cache = state->reg_cache; |
| 564 | union code c = block->opcode_list[offset].c; |
| 565 | jit_state_t *_jit = block->_jit; |
| 566 | u8 rs, rt; |
| 567 | |
| 568 | _jit_name(block->_jit, __func__); |
| 569 | jit_note(__FILE__, __LINE__); |
| 570 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0); |
| 571 | rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, |
| 572 | REG_EXT | REG_ZEXT); |
| 573 | |
| 574 | /* PSX code uses ANDI 0xff / ANDI 0xffff a lot, which are basically |
| 575 | * casts to uint8_t / uint16_t. */ |
| 576 | if (c.i.imm == 0xff) |
| 577 | jit_extr_uc(rt, rs); |
| 578 | else if (c.i.imm == 0xffff) |
| 579 | jit_extr_us(rt, rs); |
| 580 | else |
| 581 | jit_andi(rt, rs, (u32)(u16) c.i.imm); |
| 582 | |
| 583 | lightrec_free_reg(reg_cache, rs); |
| 584 | lightrec_free_reg(reg_cache, rt); |
| 585 | } |
| 586 | |
| 587 | static void rec_alu_or_xor(struct lightrec_cstate *state, const struct block *block, |
| 588 | u16 offset, jit_code_t code) |
| 589 | { |
| 590 | struct regcache *reg_cache = state->reg_cache; |
| 591 | union code c = block->opcode_list[offset].c; |
| 592 | jit_state_t *_jit = block->_jit; |
| 593 | u8 rs, rt, flags; |
| 594 | |
| 595 | jit_note(__FILE__, __LINE__); |
| 596 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0); |
| 597 | rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, 0); |
| 598 | |
| 599 | flags = lightrec_get_reg_in_flags(reg_cache, rs); |
| 600 | lightrec_set_reg_out_flags(reg_cache, rt, flags); |
| 601 | |
| 602 | jit_new_node_www(code, rt, rs, (u32)(u16) c.i.imm); |
| 603 | |
| 604 | lightrec_free_reg(reg_cache, rs); |
| 605 | lightrec_free_reg(reg_cache, rt); |
| 606 | } |
| 607 | |
| 608 | |
| 609 | static void rec_ORI(struct lightrec_cstate *state, |
| 610 | const struct block *block, u16 offset) |
| 611 | { |
| 612 | _jit_name(block->_jit, __func__); |
| 613 | rec_alu_or_xor(state, block, offset, jit_code_ori); |
| 614 | } |
| 615 | |
| 616 | static void rec_XORI(struct lightrec_cstate *state, |
| 617 | const struct block *block, u16 offset) |
| 618 | { |
| 619 | _jit_name(block->_jit, __func__); |
| 620 | rec_alu_or_xor(state, block, offset, jit_code_xori); |
| 621 | } |
| 622 | |
| 623 | static void rec_LUI(struct lightrec_cstate *state, |
| 624 | const struct block *block, u16 offset) |
| 625 | { |
| 626 | struct regcache *reg_cache = state->reg_cache; |
| 627 | union code c = block->opcode_list[offset].c; |
| 628 | jit_state_t *_jit = block->_jit; |
| 629 | u8 rt, flags = REG_EXT; |
| 630 | |
| 631 | jit_name(__func__); |
| 632 | jit_note(__FILE__, __LINE__); |
| 633 | |
| 634 | if (!(c.i.imm & BIT(15))) |
| 635 | flags |= REG_ZEXT; |
| 636 | |
| 637 | rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, flags); |
| 638 | |
| 639 | jit_movi(rt, (s32)(c.i.imm << 16)); |
| 640 | |
| 641 | lightrec_free_reg(reg_cache, rt); |
| 642 | } |
| 643 | |
| 644 | static void rec_special_ADDU(struct lightrec_cstate *state, |
| 645 | const struct block *block, u16 offset) |
| 646 | { |
| 647 | _jit_name(block->_jit, __func__); |
| 648 | rec_alu_special(state, block, offset, jit_code_addr, false); |
| 649 | } |
| 650 | |
| 651 | static void rec_special_ADD(struct lightrec_cstate *state, |
| 652 | const struct block *block, u16 offset) |
| 653 | { |
| 654 | /* TODO: Handle the exception? */ |
| 655 | _jit_name(block->_jit, __func__); |
| 656 | rec_alu_special(state, block, offset, jit_code_addr, false); |
| 657 | } |
| 658 | |
| 659 | static void rec_special_SUBU(struct lightrec_cstate *state, |
| 660 | const struct block *block, u16 offset) |
| 661 | { |
| 662 | _jit_name(block->_jit, __func__); |
| 663 | rec_alu_special(state, block, offset, jit_code_subr, false); |
| 664 | } |
| 665 | |
| 666 | static void rec_special_SUB(struct lightrec_cstate *state, |
| 667 | const struct block *block, u16 offset) |
| 668 | { |
| 669 | /* TODO: Handle the exception? */ |
| 670 | _jit_name(block->_jit, __func__); |
| 671 | rec_alu_special(state, block, offset, jit_code_subr, false); |
| 672 | } |
| 673 | |
| 674 | static void rec_special_AND(struct lightrec_cstate *state, |
| 675 | const struct block *block, u16 offset) |
| 676 | { |
| 677 | struct regcache *reg_cache = state->reg_cache; |
| 678 | union code c = block->opcode_list[offset].c; |
| 679 | jit_state_t *_jit = block->_jit; |
| 680 | u8 rd, rt, rs, flags_rs, flags_rt, flags_rd; |
| 681 | |
| 682 | _jit_name(block->_jit, __func__); |
| 683 | jit_note(__FILE__, __LINE__); |
| 684 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, 0); |
| 685 | rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, 0); |
| 686 | rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd, 0); |
| 687 | |
| 688 | flags_rs = lightrec_get_reg_in_flags(reg_cache, rs); |
| 689 | flags_rt = lightrec_get_reg_in_flags(reg_cache, rt); |
| 690 | |
| 691 | /* Z(rd) = Z(rs) | Z(rt) */ |
| 692 | flags_rd = REG_ZEXT & (flags_rs | flags_rt); |
| 693 | |
| 694 | /* E(rd) = (E(rt) & Z(rt)) | (E(rs) & Z(rs)) | (E(rs) & E(rt)) */ |
| 695 | if (((flags_rs & REG_EXT) && (flags_rt & REG_ZEXT)) || |
| 696 | ((flags_rt & REG_EXT) && (flags_rs & REG_ZEXT)) || |
| 697 | (REG_EXT & flags_rs & flags_rt)) |
| 698 | flags_rd |= REG_EXT; |
| 699 | |
| 700 | lightrec_set_reg_out_flags(reg_cache, rd, flags_rd); |
| 701 | |
| 702 | jit_andr(rd, rs, rt); |
| 703 | |
| 704 | lightrec_free_reg(reg_cache, rs); |
| 705 | lightrec_free_reg(reg_cache, rt); |
| 706 | lightrec_free_reg(reg_cache, rd); |
| 707 | } |
| 708 | |
| 709 | static void rec_special_or_nor(struct lightrec_cstate *state, |
| 710 | const struct block *block, u16 offset, bool nor) |
| 711 | { |
| 712 | struct regcache *reg_cache = state->reg_cache; |
| 713 | union code c = block->opcode_list[offset].c; |
| 714 | jit_state_t *_jit = block->_jit; |
| 715 | u8 rd, rt, rs, flags_rs, flags_rt, flags_rd = 0; |
| 716 | |
| 717 | jit_note(__FILE__, __LINE__); |
| 718 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, 0); |
| 719 | rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, 0); |
| 720 | rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd, 0); |
| 721 | |
| 722 | flags_rs = lightrec_get_reg_in_flags(reg_cache, rs); |
| 723 | flags_rt = lightrec_get_reg_in_flags(reg_cache, rt); |
| 724 | |
| 725 | /* or: Z(rd) = Z(rs) & Z(rt) |
| 726 | * nor: Z(rd) = 0 */ |
| 727 | if (!nor) |
| 728 | flags_rd = REG_ZEXT & flags_rs & flags_rt; |
| 729 | |
| 730 | /* E(rd) = E(rs) & E(rt) */ |
| 731 | if (REG_EXT & flags_rs & flags_rt) |
| 732 | flags_rd |= REG_EXT; |
| 733 | |
| 734 | lightrec_set_reg_out_flags(reg_cache, rd, flags_rd); |
| 735 | |
| 736 | jit_orr(rd, rs, rt); |
| 737 | |
| 738 | if (nor) |
| 739 | jit_comr(rd, rd); |
| 740 | |
| 741 | lightrec_free_reg(reg_cache, rs); |
| 742 | lightrec_free_reg(reg_cache, rt); |
| 743 | lightrec_free_reg(reg_cache, rd); |
| 744 | } |
| 745 | |
| 746 | static void rec_special_OR(struct lightrec_cstate *state, |
| 747 | const struct block *block, u16 offset) |
| 748 | { |
| 749 | _jit_name(block->_jit, __func__); |
| 750 | rec_special_or_nor(state, block, offset, false); |
| 751 | } |
| 752 | |
| 753 | static void rec_special_NOR(struct lightrec_cstate *state, |
| 754 | const struct block *block, u16 offset) |
| 755 | { |
| 756 | _jit_name(block->_jit, __func__); |
| 757 | rec_special_or_nor(state, block, offset, true); |
| 758 | } |
| 759 | |
| 760 | static void rec_special_XOR(struct lightrec_cstate *state, |
| 761 | const struct block *block, u16 offset) |
| 762 | { |
| 763 | struct regcache *reg_cache = state->reg_cache; |
| 764 | union code c = block->opcode_list[offset].c; |
| 765 | jit_state_t *_jit = block->_jit; |
| 766 | u8 rd, rt, rs, flags_rs, flags_rt, flags_rd; |
| 767 | |
| 768 | _jit_name(block->_jit, __func__); |
| 769 | |
| 770 | jit_note(__FILE__, __LINE__); |
| 771 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, 0); |
| 772 | rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, 0); |
| 773 | rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd, 0); |
| 774 | |
| 775 | flags_rs = lightrec_get_reg_in_flags(reg_cache, rs); |
| 776 | flags_rt = lightrec_get_reg_in_flags(reg_cache, rt); |
| 777 | |
| 778 | /* Z(rd) = Z(rs) & Z(rt) */ |
| 779 | flags_rd = REG_ZEXT & flags_rs & flags_rt; |
| 780 | |
| 781 | /* E(rd) = E(rs) & E(rt) */ |
| 782 | flags_rd |= REG_EXT & flags_rs & flags_rt; |
| 783 | |
| 784 | lightrec_set_reg_out_flags(reg_cache, rd, flags_rd); |
| 785 | |
| 786 | jit_xorr(rd, rs, rt); |
| 787 | |
| 788 | lightrec_free_reg(reg_cache, rs); |
| 789 | lightrec_free_reg(reg_cache, rt); |
| 790 | lightrec_free_reg(reg_cache, rd); |
| 791 | } |
| 792 | |
| 793 | static void rec_special_SLTU(struct lightrec_cstate *state, |
| 794 | const struct block *block, u16 offset) |
| 795 | { |
| 796 | _jit_name(block->_jit, __func__); |
| 797 | rec_alu_special(state, block, offset, jit_code_ltr_u, true); |
| 798 | } |
| 799 | |
| 800 | static void rec_special_SLT(struct lightrec_cstate *state, |
| 801 | const struct block *block, u16 offset) |
| 802 | { |
| 803 | _jit_name(block->_jit, __func__); |
| 804 | rec_alu_special(state, block, offset, jit_code_ltr, true); |
| 805 | } |
| 806 | |
| 807 | static void rec_special_SLLV(struct lightrec_cstate *state, |
| 808 | const struct block *block, u16 offset) |
| 809 | { |
| 810 | _jit_name(block->_jit, __func__); |
| 811 | rec_alu_shiftv(state, block, offset, jit_code_lshr); |
| 812 | } |
| 813 | |
| 814 | static void rec_special_SRLV(struct lightrec_cstate *state, |
| 815 | const struct block *block, u16 offset) |
| 816 | { |
| 817 | _jit_name(block->_jit, __func__); |
| 818 | rec_alu_shiftv(state, block, offset, jit_code_rshr_u); |
| 819 | } |
| 820 | |
| 821 | static void rec_special_SRAV(struct lightrec_cstate *state, |
| 822 | const struct block *block, u16 offset) |
| 823 | { |
| 824 | _jit_name(block->_jit, __func__); |
| 825 | rec_alu_shiftv(state, block, offset, jit_code_rshr); |
| 826 | } |
| 827 | |
| 828 | static void rec_alu_shift(struct lightrec_cstate *state, const struct block *block, |
| 829 | u16 offset, jit_code_t code) |
| 830 | { |
| 831 | struct regcache *reg_cache = state->reg_cache; |
| 832 | union code c = block->opcode_list[offset].c; |
| 833 | jit_state_t *_jit = block->_jit; |
| 834 | u8 rd, rt, flags = 0; |
| 835 | |
| 836 | jit_note(__FILE__, __LINE__); |
| 837 | |
| 838 | if (code == jit_code_rshi) |
| 839 | flags = REG_EXT; |
| 840 | else if (code == jit_code_rshi_u) |
| 841 | flags = REG_ZEXT; |
| 842 | |
| 843 | rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, flags); |
| 844 | |
| 845 | /* Input reg is zero-extended, if we SRL at least by one bit, we know |
| 846 | * the output reg will be both zero-extended and sign-extended. */ |
| 847 | if (code == jit_code_rshi_u && c.r.imm) |
| 848 | flags |= REG_EXT; |
| 849 | rd = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rd, flags); |
| 850 | |
| 851 | jit_new_node_www(code, rd, rt, c.r.imm); |
| 852 | |
| 853 | lightrec_free_reg(reg_cache, rt); |
| 854 | lightrec_free_reg(reg_cache, rd); |
| 855 | } |
| 856 | |
| 857 | static void rec_special_SLL(struct lightrec_cstate *state, |
| 858 | const struct block *block, u16 offset) |
| 859 | { |
| 860 | _jit_name(block->_jit, __func__); |
| 861 | rec_alu_shift(state, block, offset, jit_code_lshi); |
| 862 | } |
| 863 | |
| 864 | static void rec_special_SRL(struct lightrec_cstate *state, |
| 865 | const struct block *block, u16 offset) |
| 866 | { |
| 867 | _jit_name(block->_jit, __func__); |
| 868 | rec_alu_shift(state, block, offset, jit_code_rshi_u); |
| 869 | } |
| 870 | |
| 871 | static void rec_special_SRA(struct lightrec_cstate *state, |
| 872 | const struct block *block, u16 offset) |
| 873 | { |
| 874 | _jit_name(block->_jit, __func__); |
| 875 | rec_alu_shift(state, block, offset, jit_code_rshi); |
| 876 | } |
| 877 | |
| 878 | static void rec_alu_mult(struct lightrec_cstate *state, |
| 879 | const struct block *block, u16 offset, bool is_signed) |
| 880 | { |
| 881 | struct regcache *reg_cache = state->reg_cache; |
| 882 | union code c = block->opcode_list[offset].c; |
| 883 | u32 flags = block->opcode_list[offset].flags; |
| 884 | u8 reg_lo = get_mult_div_lo(c); |
| 885 | u8 reg_hi = get_mult_div_hi(c); |
| 886 | jit_state_t *_jit = block->_jit; |
| 887 | u8 lo, hi, rs, rt, rflags = 0; |
| 888 | |
| 889 | jit_note(__FILE__, __LINE__); |
| 890 | |
| 891 | if (is_signed) |
| 892 | rflags = REG_EXT; |
| 893 | else |
| 894 | rflags = REG_ZEXT; |
| 895 | |
| 896 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, rflags); |
| 897 | rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, rflags); |
| 898 | |
| 899 | if (!op_flag_no_lo(flags)) |
| 900 | lo = lightrec_alloc_reg_out(reg_cache, _jit, reg_lo, 0); |
| 901 | else if (__WORDSIZE == 32) |
| 902 | lo = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 903 | |
| 904 | if (!op_flag_no_hi(flags)) |
| 905 | hi = lightrec_alloc_reg_out(reg_cache, _jit, reg_hi, REG_EXT); |
| 906 | |
| 907 | if (__WORDSIZE == 32) { |
| 908 | /* On 32-bit systems, do a 32*32->64 bit operation, or a 32*32->32 bit |
| 909 | * operation if the MULT was detected a 32-bit only. */ |
| 910 | if (!op_flag_no_hi(flags)) { |
| 911 | if (is_signed) |
| 912 | jit_qmulr(lo, hi, rs, rt); |
| 913 | else |
| 914 | jit_qmulr_u(lo, hi, rs, rt); |
| 915 | } else { |
| 916 | jit_mulr(lo, rs, rt); |
| 917 | } |
| 918 | } else { |
| 919 | /* On 64-bit systems, do a 64*64->64 bit operation. */ |
| 920 | if (op_flag_no_lo(flags)) { |
| 921 | jit_mulr(hi, rs, rt); |
| 922 | jit_rshi(hi, hi, 32); |
| 923 | } else { |
| 924 | jit_mulr(lo, rs, rt); |
| 925 | |
| 926 | /* The 64-bit output value is in $lo, store the upper 32 bits in $hi */ |
| 927 | if (!op_flag_no_hi(flags)) |
| 928 | jit_rshi(hi, lo, 32); |
| 929 | } |
| 930 | } |
| 931 | |
| 932 | lightrec_free_reg(reg_cache, rs); |
| 933 | lightrec_free_reg(reg_cache, rt); |
| 934 | if (!op_flag_no_lo(flags) || __WORDSIZE == 32) |
| 935 | lightrec_free_reg(reg_cache, lo); |
| 936 | if (!op_flag_no_hi(flags)) |
| 937 | lightrec_free_reg(reg_cache, hi); |
| 938 | } |
| 939 | |
| 940 | static void rec_alu_div(struct lightrec_cstate *state, |
| 941 | const struct block *block, u16 offset, bool is_signed) |
| 942 | { |
| 943 | struct regcache *reg_cache = state->reg_cache; |
| 944 | union code c = block->opcode_list[offset].c; |
| 945 | u32 flags = block->opcode_list[offset].flags; |
| 946 | bool no_check = op_flag_no_div_check(flags); |
| 947 | u8 reg_lo = get_mult_div_lo(c); |
| 948 | u8 reg_hi = get_mult_div_hi(c); |
| 949 | jit_state_t *_jit = block->_jit; |
| 950 | jit_node_t *branch, *to_end; |
| 951 | u8 lo = 0, hi = 0, rs, rt, rflags = 0; |
| 952 | |
| 953 | jit_note(__FILE__, __LINE__); |
| 954 | |
| 955 | if (is_signed) |
| 956 | rflags = REG_EXT; |
| 957 | else |
| 958 | rflags = REG_ZEXT; |
| 959 | |
| 960 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rs, rflags); |
| 961 | rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, rflags); |
| 962 | |
| 963 | if (!op_flag_no_lo(flags)) |
| 964 | lo = lightrec_alloc_reg_out(reg_cache, _jit, reg_lo, 0); |
| 965 | |
| 966 | if (!op_flag_no_hi(flags)) |
| 967 | hi = lightrec_alloc_reg_out(reg_cache, _jit, reg_hi, 0); |
| 968 | |
| 969 | /* Jump to special handler if dividing by zero */ |
| 970 | if (!no_check) |
| 971 | branch = jit_beqi(rt, 0); |
| 972 | |
| 973 | if (op_flag_no_lo(flags)) { |
| 974 | if (is_signed) |
| 975 | jit_remr(hi, rs, rt); |
| 976 | else |
| 977 | jit_remr_u(hi, rs, rt); |
| 978 | } else if (op_flag_no_hi(flags)) { |
| 979 | if (is_signed) |
| 980 | jit_divr(lo, rs, rt); |
| 981 | else |
| 982 | jit_divr_u(lo, rs, rt); |
| 983 | } else { |
| 984 | if (is_signed) |
| 985 | jit_qdivr(lo, hi, rs, rt); |
| 986 | else |
| 987 | jit_qdivr_u(lo, hi, rs, rt); |
| 988 | } |
| 989 | |
| 990 | if (!no_check) { |
| 991 | /* Jump above the div-by-zero handler */ |
| 992 | to_end = jit_b(); |
| 993 | |
| 994 | jit_patch(branch); |
| 995 | |
| 996 | if (!op_flag_no_lo(flags)) { |
| 997 | if (is_signed) { |
| 998 | jit_ltr(lo, rs, rt); |
| 999 | jit_lshi(lo, lo, 1); |
| 1000 | jit_subi(lo, lo, 1); |
| 1001 | } else { |
| 1002 | jit_subi(lo, rt, 1); |
| 1003 | } |
| 1004 | } |
| 1005 | |
| 1006 | if (!op_flag_no_hi(flags)) |
| 1007 | jit_movr(hi, rs); |
| 1008 | |
| 1009 | jit_patch(to_end); |
| 1010 | } |
| 1011 | |
| 1012 | lightrec_free_reg(reg_cache, rs); |
| 1013 | lightrec_free_reg(reg_cache, rt); |
| 1014 | |
| 1015 | if (!op_flag_no_lo(flags)) |
| 1016 | lightrec_free_reg(reg_cache, lo); |
| 1017 | |
| 1018 | if (!op_flag_no_hi(flags)) |
| 1019 | lightrec_free_reg(reg_cache, hi); |
| 1020 | } |
| 1021 | |
| 1022 | static void rec_special_MULT(struct lightrec_cstate *state, |
| 1023 | const struct block *block, u16 offset) |
| 1024 | { |
| 1025 | _jit_name(block->_jit, __func__); |
| 1026 | rec_alu_mult(state, block, offset, true); |
| 1027 | } |
| 1028 | |
| 1029 | static void rec_special_MULTU(struct lightrec_cstate *state, |
| 1030 | const struct block *block, u16 offset) |
| 1031 | { |
| 1032 | _jit_name(block->_jit, __func__); |
| 1033 | rec_alu_mult(state, block, offset, false); |
| 1034 | } |
| 1035 | |
| 1036 | static void rec_special_DIV(struct lightrec_cstate *state, |
| 1037 | const struct block *block, u16 offset) |
| 1038 | { |
| 1039 | _jit_name(block->_jit, __func__); |
| 1040 | rec_alu_div(state, block, offset, true); |
| 1041 | } |
| 1042 | |
| 1043 | static void rec_special_DIVU(struct lightrec_cstate *state, |
| 1044 | const struct block *block, u16 offset) |
| 1045 | { |
| 1046 | _jit_name(block->_jit, __func__); |
| 1047 | rec_alu_div(state, block, offset, false); |
| 1048 | } |
| 1049 | |
| 1050 | static void rec_alu_mv_lo_hi(struct lightrec_cstate *state, |
| 1051 | const struct block *block, u8 dst, u8 src) |
| 1052 | { |
| 1053 | struct regcache *reg_cache = state->reg_cache; |
| 1054 | jit_state_t *_jit = block->_jit; |
| 1055 | |
| 1056 | jit_note(__FILE__, __LINE__); |
| 1057 | src = lightrec_alloc_reg_in(reg_cache, _jit, src, 0); |
| 1058 | dst = lightrec_alloc_reg_out(reg_cache, _jit, dst, REG_EXT); |
| 1059 | |
| 1060 | jit_extr_i(dst, src); |
| 1061 | |
| 1062 | lightrec_free_reg(reg_cache, src); |
| 1063 | lightrec_free_reg(reg_cache, dst); |
| 1064 | } |
| 1065 | |
| 1066 | static void rec_special_MFHI(struct lightrec_cstate *state, |
| 1067 | const struct block *block, u16 offset) |
| 1068 | { |
| 1069 | union code c = block->opcode_list[offset].c; |
| 1070 | |
| 1071 | _jit_name(block->_jit, __func__); |
| 1072 | rec_alu_mv_lo_hi(state, block, c.r.rd, REG_HI); |
| 1073 | } |
| 1074 | |
| 1075 | static void rec_special_MTHI(struct lightrec_cstate *state, |
| 1076 | const struct block *block, u16 offset) |
| 1077 | { |
| 1078 | union code c = block->opcode_list[offset].c; |
| 1079 | |
| 1080 | _jit_name(block->_jit, __func__); |
| 1081 | rec_alu_mv_lo_hi(state, block, REG_HI, c.r.rs); |
| 1082 | } |
| 1083 | |
| 1084 | static void rec_special_MFLO(struct lightrec_cstate *state, |
| 1085 | const struct block *block, u16 offset) |
| 1086 | { |
| 1087 | union code c = block->opcode_list[offset].c; |
| 1088 | |
| 1089 | _jit_name(block->_jit, __func__); |
| 1090 | rec_alu_mv_lo_hi(state, block, c.r.rd, REG_LO); |
| 1091 | } |
| 1092 | |
| 1093 | static void rec_special_MTLO(struct lightrec_cstate *state, |
| 1094 | const struct block *block, u16 offset) |
| 1095 | { |
| 1096 | union code c = block->opcode_list[offset].c; |
| 1097 | |
| 1098 | _jit_name(block->_jit, __func__); |
| 1099 | rec_alu_mv_lo_hi(state, block, REG_LO, c.r.rs); |
| 1100 | } |
| 1101 | |
| 1102 | static void call_to_c_wrapper(struct lightrec_cstate *state, |
| 1103 | const struct block *block, u32 arg, |
| 1104 | enum c_wrappers wrapper) |
| 1105 | { |
| 1106 | struct regcache *reg_cache = state->reg_cache; |
| 1107 | jit_state_t *_jit = block->_jit; |
| 1108 | s8 tmp, tmp2; |
| 1109 | |
| 1110 | /* Make sure JIT_R1 is not mapped; it will be used in the C wrapper. */ |
| 1111 | tmp2 = lightrec_alloc_reg(reg_cache, _jit, JIT_R1); |
| 1112 | |
| 1113 | tmp = lightrec_get_reg_with_value(reg_cache, |
| 1114 | (intptr_t) state->state->wrappers_eps[wrapper]); |
| 1115 | if (tmp < 0) { |
| 1116 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 1117 | jit_ldxi(tmp, LIGHTREC_REG_STATE, |
| 1118 | offsetof(struct lightrec_state, wrappers_eps[wrapper])); |
| 1119 | |
| 1120 | lightrec_temp_set_value(reg_cache, tmp, |
| 1121 | (intptr_t) state->state->wrappers_eps[wrapper]); |
| 1122 | } |
| 1123 | |
| 1124 | lightrec_free_reg(reg_cache, tmp2); |
| 1125 | |
| 1126 | #ifdef __mips__ |
| 1127 | /* On MIPS, register t9 is always used as the target register for JALR. |
| 1128 | * Therefore if it does not contain the target address we must |
| 1129 | * invalidate it. */ |
| 1130 | if (tmp != _T9) |
| 1131 | lightrec_unload_reg(reg_cache, _jit, _T9); |
| 1132 | #endif |
| 1133 | |
| 1134 | jit_prepare(); |
| 1135 | jit_pushargi(arg); |
| 1136 | |
| 1137 | lightrec_regcache_mark_live(reg_cache, _jit); |
| 1138 | jit_callr(tmp); |
| 1139 | |
| 1140 | lightrec_free_reg(reg_cache, tmp); |
| 1141 | lightrec_regcache_mark_live(reg_cache, _jit); |
| 1142 | } |
| 1143 | |
| 1144 | static void rec_io(struct lightrec_cstate *state, |
| 1145 | const struct block *block, u16 offset, |
| 1146 | bool load_rt, bool read_rt) |
| 1147 | { |
| 1148 | struct regcache *reg_cache = state->reg_cache; |
| 1149 | jit_state_t *_jit = block->_jit; |
| 1150 | union code c = block->opcode_list[offset].c; |
| 1151 | u32 flags = block->opcode_list[offset].flags; |
| 1152 | bool is_tagged = LIGHTREC_FLAGS_GET_IO_MODE(flags); |
| 1153 | u32 lut_entry; |
| 1154 | u8 zero; |
| 1155 | |
| 1156 | jit_note(__FILE__, __LINE__); |
| 1157 | |
| 1158 | lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rs, false); |
| 1159 | |
| 1160 | if (read_rt && likely(c.i.rt)) |
| 1161 | lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rt, true); |
| 1162 | else if (load_rt) |
| 1163 | lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rt, false); |
| 1164 | |
| 1165 | if (op_flag_load_delay(flags) && !state->no_load_delay) { |
| 1166 | /* Clear state->in_delay_slot_n. This notifies the lightrec_rw |
| 1167 | * wrapper that it should write the REG_TEMP register instead of |
| 1168 | * the actual output register of the opcode. */ |
| 1169 | zero = lightrec_alloc_reg_in(reg_cache, _jit, 0, 0); |
| 1170 | jit_stxi_c(offsetof(struct lightrec_state, in_delay_slot_n), |
| 1171 | LIGHTREC_REG_STATE, zero); |
| 1172 | lightrec_free_reg(reg_cache, zero); |
| 1173 | } |
| 1174 | |
| 1175 | if (is_tagged) { |
| 1176 | call_to_c_wrapper(state, block, c.opcode, C_WRAPPER_RW); |
| 1177 | } else { |
| 1178 | lut_entry = lightrec_get_lut_entry(block); |
| 1179 | call_to_c_wrapper(state, block, (lut_entry << 16) | offset, |
| 1180 | C_WRAPPER_RW_GENERIC); |
| 1181 | } |
| 1182 | } |
| 1183 | |
| 1184 | static u32 rec_ram_mask(struct lightrec_state *state) |
| 1185 | { |
| 1186 | return (RAM_SIZE << (state->mirrors_mapped * 2)) - 1; |
| 1187 | } |
| 1188 | |
| 1189 | static u32 rec_io_mask(const struct lightrec_state *state) |
| 1190 | { |
| 1191 | u32 length = state->maps[PSX_MAP_HW_REGISTERS].length; |
| 1192 | |
| 1193 | return 0x1f800000 | GENMASK(31 - clz32(length - 1), 0); |
| 1194 | } |
| 1195 | |
| 1196 | static void rec_store_memory(struct lightrec_cstate *cstate, |
| 1197 | const struct block *block, |
| 1198 | u16 offset, jit_code_t code, |
| 1199 | jit_code_t swap_code, |
| 1200 | uintptr_t addr_offset, u32 addr_mask, |
| 1201 | bool invalidate) |
| 1202 | { |
| 1203 | const struct lightrec_state *state = cstate->state; |
| 1204 | struct regcache *reg_cache = cstate->reg_cache; |
| 1205 | struct opcode *op = &block->opcode_list[offset]; |
| 1206 | jit_state_t *_jit = block->_jit; |
| 1207 | union code c = op->c; |
| 1208 | u8 rs, rt, tmp, tmp2, tmp3, addr_reg, addr_reg2; |
| 1209 | s16 imm = (s16)c.i.imm; |
| 1210 | s32 simm = (s32)imm << (1 - lut_is_32bit(state)); |
| 1211 | s32 lut_offt = offsetof(struct lightrec_state, code_lut); |
| 1212 | bool no_mask = op_flag_no_mask(op->flags); |
| 1213 | bool add_imm = c.i.imm && |
| 1214 | ((!state->mirrors_mapped && !no_mask) || (invalidate && |
| 1215 | ((imm & 0x3) || simm + lut_offt != (s16)(simm + lut_offt)))); |
| 1216 | bool need_tmp = !no_mask || addr_offset || add_imm || invalidate; |
| 1217 | bool swc2 = c.i.op == OP_SWC2; |
| 1218 | u8 in_reg = swc2 ? REG_TEMP : c.i.rt; |
| 1219 | |
| 1220 | rt = lightrec_alloc_reg_in(reg_cache, _jit, in_reg, 0); |
| 1221 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0); |
| 1222 | if (need_tmp) |
| 1223 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 1224 | |
| 1225 | addr_reg = rs; |
| 1226 | |
| 1227 | if (add_imm) { |
| 1228 | jit_addi(tmp, addr_reg, (s16)c.i.imm); |
| 1229 | lightrec_free_reg(reg_cache, rs); |
| 1230 | addr_reg = tmp; |
| 1231 | imm = 0; |
| 1232 | } else if (simm) { |
| 1233 | lut_offt += simm; |
| 1234 | } |
| 1235 | |
| 1236 | if (!no_mask) { |
| 1237 | jit_andi(tmp, addr_reg, addr_mask); |
| 1238 | addr_reg = tmp; |
| 1239 | } |
| 1240 | |
| 1241 | if (addr_offset) { |
| 1242 | tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 1243 | jit_addi(tmp2, addr_reg, addr_offset); |
| 1244 | addr_reg2 = tmp2; |
| 1245 | } else { |
| 1246 | addr_reg2 = addr_reg; |
| 1247 | } |
| 1248 | |
| 1249 | if (is_big_endian() && swap_code && in_reg) { |
| 1250 | tmp3 = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 1251 | |
| 1252 | jit_new_node_ww(swap_code, tmp3, rt); |
| 1253 | jit_new_node_www(code, imm, addr_reg2, tmp3); |
| 1254 | |
| 1255 | lightrec_free_reg(reg_cache, tmp3); |
| 1256 | } else { |
| 1257 | jit_new_node_www(code, imm, addr_reg2, rt); |
| 1258 | } |
| 1259 | |
| 1260 | lightrec_free_reg(reg_cache, rt); |
| 1261 | |
| 1262 | if (invalidate) { |
| 1263 | tmp3 = lightrec_alloc_reg_in(reg_cache, _jit, 0, 0); |
| 1264 | |
| 1265 | if (c.i.op != OP_SW) { |
| 1266 | jit_andi(tmp, addr_reg, ~3); |
| 1267 | addr_reg = tmp; |
| 1268 | } |
| 1269 | |
| 1270 | if (!lut_is_32bit(state)) { |
| 1271 | jit_lshi(tmp, addr_reg, 1); |
| 1272 | addr_reg = tmp; |
| 1273 | } |
| 1274 | |
| 1275 | if (addr_reg == rs && c.i.rs == 0) { |
| 1276 | addr_reg = LIGHTREC_REG_STATE; |
| 1277 | } else { |
| 1278 | jit_add_state(tmp, addr_reg); |
| 1279 | addr_reg = tmp; |
| 1280 | } |
| 1281 | |
| 1282 | if (lut_is_32bit(state)) |
| 1283 | jit_stxi_i(lut_offt, addr_reg, tmp3); |
| 1284 | else |
| 1285 | jit_stxi(lut_offt, addr_reg, tmp3); |
| 1286 | |
| 1287 | lightrec_free_reg(reg_cache, tmp3); |
| 1288 | } |
| 1289 | |
| 1290 | if (addr_offset) |
| 1291 | lightrec_free_reg(reg_cache, tmp2); |
| 1292 | if (need_tmp) |
| 1293 | lightrec_free_reg(reg_cache, tmp); |
| 1294 | lightrec_free_reg(reg_cache, rs); |
| 1295 | } |
| 1296 | |
| 1297 | static void rec_store_ram(struct lightrec_cstate *cstate, |
| 1298 | const struct block *block, |
| 1299 | u16 offset, jit_code_t code, |
| 1300 | jit_code_t swap_code, bool invalidate) |
| 1301 | { |
| 1302 | struct lightrec_state *state = cstate->state; |
| 1303 | |
| 1304 | _jit_note(block->_jit, __FILE__, __LINE__); |
| 1305 | |
| 1306 | return rec_store_memory(cstate, block, offset, code, swap_code, |
| 1307 | state->offset_ram, rec_ram_mask(state), |
| 1308 | invalidate); |
| 1309 | } |
| 1310 | |
| 1311 | static void rec_store_scratch(struct lightrec_cstate *cstate, |
| 1312 | const struct block *block, u16 offset, |
| 1313 | jit_code_t code, jit_code_t swap_code) |
| 1314 | { |
| 1315 | _jit_note(block->_jit, __FILE__, __LINE__); |
| 1316 | |
| 1317 | return rec_store_memory(cstate, block, offset, code, swap_code, |
| 1318 | cstate->state->offset_scratch, |
| 1319 | 0x1fffffff, false); |
| 1320 | } |
| 1321 | |
| 1322 | static void rec_store_io(struct lightrec_cstate *cstate, |
| 1323 | const struct block *block, u16 offset, |
| 1324 | jit_code_t code, jit_code_t swap_code) |
| 1325 | { |
| 1326 | _jit_note(block->_jit, __FILE__, __LINE__); |
| 1327 | |
| 1328 | return rec_store_memory(cstate, block, offset, code, swap_code, |
| 1329 | cstate->state->offset_io, |
| 1330 | rec_io_mask(cstate->state), false); |
| 1331 | } |
| 1332 | |
| 1333 | static void rec_store_direct_no_invalidate(struct lightrec_cstate *cstate, |
| 1334 | const struct block *block, |
| 1335 | u16 offset, jit_code_t code, |
| 1336 | jit_code_t swap_code) |
| 1337 | { |
| 1338 | struct lightrec_state *state = cstate->state; |
| 1339 | struct regcache *reg_cache = cstate->reg_cache; |
| 1340 | union code c = block->opcode_list[offset].c; |
| 1341 | jit_state_t *_jit = block->_jit; |
| 1342 | jit_node_t *to_not_ram, *to_end; |
| 1343 | bool swc2 = c.i.op == OP_SWC2; |
| 1344 | bool offset_ram_or_scratch = state->offset_ram || state->offset_scratch; |
| 1345 | u8 tmp, tmp2, rs, rt, in_reg = swc2 ? REG_TEMP : c.i.rt; |
| 1346 | s16 imm; |
| 1347 | |
| 1348 | jit_note(__FILE__, __LINE__); |
| 1349 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0); |
| 1350 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 1351 | |
| 1352 | if (offset_ram_or_scratch) |
| 1353 | tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 1354 | |
| 1355 | /* Convert to KUNSEG and avoid RAM mirrors */ |
| 1356 | if (state->mirrors_mapped) { |
| 1357 | imm = (s16)c.i.imm; |
| 1358 | jit_andi(tmp, rs, 0x1f800000 | (4 * RAM_SIZE - 1)); |
| 1359 | } else if (c.i.imm) { |
| 1360 | imm = 0; |
| 1361 | jit_addi(tmp, rs, (s16)c.i.imm); |
| 1362 | jit_andi(tmp, tmp, 0x1f800000 | (RAM_SIZE - 1)); |
| 1363 | } else { |
| 1364 | imm = 0; |
| 1365 | jit_andi(tmp, rs, 0x1f800000 | (RAM_SIZE - 1)); |
| 1366 | } |
| 1367 | |
| 1368 | lightrec_free_reg(reg_cache, rs); |
| 1369 | |
| 1370 | if (state->offset_ram != state->offset_scratch) { |
| 1371 | to_not_ram = jit_bmsi(tmp, BIT(28)); |
| 1372 | |
| 1373 | jit_movi(tmp2, state->offset_ram); |
| 1374 | |
| 1375 | to_end = jit_b(); |
| 1376 | jit_patch(to_not_ram); |
| 1377 | |
| 1378 | jit_movi(tmp2, state->offset_scratch); |
| 1379 | jit_patch(to_end); |
| 1380 | } else if (state->offset_ram) { |
| 1381 | jit_movi(tmp2, state->offset_ram); |
| 1382 | } |
| 1383 | |
| 1384 | if (offset_ram_or_scratch) { |
| 1385 | jit_addr(tmp, tmp, tmp2); |
| 1386 | lightrec_free_reg(reg_cache, tmp2); |
| 1387 | } |
| 1388 | |
| 1389 | rt = lightrec_alloc_reg_in(reg_cache, _jit, in_reg, 0); |
| 1390 | |
| 1391 | if (is_big_endian() && swap_code && in_reg) { |
| 1392 | tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 1393 | |
| 1394 | jit_new_node_ww(swap_code, tmp2, rt); |
| 1395 | jit_new_node_www(code, imm, tmp, tmp2); |
| 1396 | |
| 1397 | lightrec_free_reg(reg_cache, tmp2); |
| 1398 | } else { |
| 1399 | jit_new_node_www(code, imm, tmp, rt); |
| 1400 | } |
| 1401 | |
| 1402 | lightrec_free_reg(reg_cache, rt); |
| 1403 | lightrec_free_reg(reg_cache, tmp); |
| 1404 | } |
| 1405 | |
| 1406 | static void rec_store_direct(struct lightrec_cstate *cstate, const struct block *block, |
| 1407 | u16 offset, jit_code_t code, jit_code_t swap_code) |
| 1408 | { |
| 1409 | struct lightrec_state *state = cstate->state; |
| 1410 | u32 ram_size = state->mirrors_mapped ? RAM_SIZE * 4 : RAM_SIZE; |
| 1411 | struct regcache *reg_cache = cstate->reg_cache; |
| 1412 | union code c = block->opcode_list[offset].c; |
| 1413 | jit_state_t *_jit = block->_jit; |
| 1414 | jit_node_t *to_not_ram, *to_end; |
| 1415 | bool swc2 = c.i.op == OP_SWC2; |
| 1416 | u8 tmp, tmp2, tmp3, masked_reg, rs, rt; |
| 1417 | u8 in_reg = swc2 ? REG_TEMP : c.i.rt; |
| 1418 | |
| 1419 | jit_note(__FILE__, __LINE__); |
| 1420 | |
| 1421 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0); |
| 1422 | tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 1423 | tmp3 = lightrec_alloc_reg_in(reg_cache, _jit, 0, 0); |
| 1424 | |
| 1425 | /* Convert to KUNSEG and avoid RAM mirrors */ |
| 1426 | if (c.i.imm) { |
| 1427 | jit_addi(tmp2, rs, (s16)c.i.imm); |
| 1428 | jit_andi(tmp2, tmp2, 0x1f800000 | (ram_size - 1)); |
| 1429 | } else { |
| 1430 | jit_andi(tmp2, rs, 0x1f800000 | (ram_size - 1)); |
| 1431 | } |
| 1432 | |
| 1433 | lightrec_free_reg(reg_cache, rs); |
| 1434 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 1435 | |
| 1436 | if (state->offset_ram != state->offset_scratch) { |
| 1437 | to_not_ram = jit_bgti(tmp2, ram_size); |
| 1438 | masked_reg = tmp2; |
| 1439 | } else { |
| 1440 | jit_lti_u(tmp, tmp2, ram_size); |
| 1441 | jit_movnr(tmp, tmp2, tmp); |
| 1442 | masked_reg = tmp; |
| 1443 | } |
| 1444 | |
| 1445 | /* Compute the offset to the code LUT */ |
| 1446 | if (c.i.op == OP_SW) |
| 1447 | jit_andi(tmp, masked_reg, RAM_SIZE - 1); |
| 1448 | else |
| 1449 | jit_andi(tmp, masked_reg, (RAM_SIZE - 1) & ~3); |
| 1450 | |
| 1451 | if (!lut_is_32bit(state)) |
| 1452 | jit_lshi(tmp, tmp, 1); |
| 1453 | jit_add_state(tmp, tmp); |
| 1454 | |
| 1455 | /* Write NULL to the code LUT to invalidate any block that's there */ |
| 1456 | if (lut_is_32bit(state)) |
| 1457 | jit_stxi_i(offsetof(struct lightrec_state, code_lut), tmp, tmp3); |
| 1458 | else |
| 1459 | jit_stxi(offsetof(struct lightrec_state, code_lut), tmp, tmp3); |
| 1460 | |
| 1461 | if (state->offset_ram != state->offset_scratch) { |
| 1462 | jit_movi(tmp, state->offset_ram); |
| 1463 | |
| 1464 | to_end = jit_b(); |
| 1465 | jit_patch(to_not_ram); |
| 1466 | } |
| 1467 | |
| 1468 | if (state->offset_ram || state->offset_scratch) |
| 1469 | jit_movi(tmp, state->offset_scratch); |
| 1470 | |
| 1471 | if (state->offset_ram != state->offset_scratch) |
| 1472 | jit_patch(to_end); |
| 1473 | |
| 1474 | if (state->offset_ram || state->offset_scratch) |
| 1475 | jit_addr(tmp2, tmp2, tmp); |
| 1476 | |
| 1477 | lightrec_free_reg(reg_cache, tmp); |
| 1478 | lightrec_free_reg(reg_cache, tmp3); |
| 1479 | |
| 1480 | rt = lightrec_alloc_reg_in(reg_cache, _jit, in_reg, 0); |
| 1481 | |
| 1482 | if (is_big_endian() && swap_code && in_reg) { |
| 1483 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 1484 | |
| 1485 | jit_new_node_ww(swap_code, tmp, rt); |
| 1486 | jit_new_node_www(code, 0, tmp2, tmp); |
| 1487 | |
| 1488 | lightrec_free_reg(reg_cache, tmp); |
| 1489 | } else { |
| 1490 | jit_new_node_www(code, 0, tmp2, rt); |
| 1491 | } |
| 1492 | |
| 1493 | lightrec_free_reg(reg_cache, rt); |
| 1494 | lightrec_free_reg(reg_cache, tmp2); |
| 1495 | } |
| 1496 | |
| 1497 | static void rec_store(struct lightrec_cstate *state, |
| 1498 | const struct block *block, u16 offset, |
| 1499 | jit_code_t code, jit_code_t swap_code) |
| 1500 | { |
| 1501 | u32 flags = block->opcode_list[offset].flags; |
| 1502 | u32 mode = LIGHTREC_FLAGS_GET_IO_MODE(flags); |
| 1503 | bool no_invalidate = op_flag_no_invalidate(flags) || |
| 1504 | state->state->invalidate_from_dma_only; |
| 1505 | union code c = block->opcode_list[offset].c; |
| 1506 | bool is_swc2 = c.i.op == OP_SWC2; |
| 1507 | |
| 1508 | if (is_swc2) { |
| 1509 | switch (mode) { |
| 1510 | case LIGHTREC_IO_RAM: |
| 1511 | case LIGHTREC_IO_SCRATCH: |
| 1512 | case LIGHTREC_IO_DIRECT: |
| 1513 | case LIGHTREC_IO_DIRECT_HW: |
| 1514 | rec_cp2_do_mfc2(state, block, offset, c.i.rt, REG_TEMP); |
| 1515 | break; |
| 1516 | default: |
| 1517 | break; |
| 1518 | } |
| 1519 | } |
| 1520 | |
| 1521 | switch (mode) { |
| 1522 | case LIGHTREC_IO_RAM: |
| 1523 | rec_store_ram(state, block, offset, code, |
| 1524 | swap_code, !no_invalidate); |
| 1525 | break; |
| 1526 | case LIGHTREC_IO_SCRATCH: |
| 1527 | rec_store_scratch(state, block, offset, code, swap_code); |
| 1528 | break; |
| 1529 | case LIGHTREC_IO_DIRECT: |
| 1530 | if (no_invalidate) { |
| 1531 | rec_store_direct_no_invalidate(state, block, offset, |
| 1532 | code, swap_code); |
| 1533 | } else { |
| 1534 | rec_store_direct(state, block, offset, code, swap_code); |
| 1535 | } |
| 1536 | break; |
| 1537 | case LIGHTREC_IO_DIRECT_HW: |
| 1538 | rec_store_io(state, block, offset, code, swap_code); |
| 1539 | break; |
| 1540 | default: |
| 1541 | rec_io(state, block, offset, true, false); |
| 1542 | return; |
| 1543 | } |
| 1544 | |
| 1545 | if (is_swc2) |
| 1546 | lightrec_discard_reg_if_loaded(state->reg_cache, REG_TEMP); |
| 1547 | } |
| 1548 | |
| 1549 | static void rec_SB(struct lightrec_cstate *state, |
| 1550 | const struct block *block, u16 offset) |
| 1551 | { |
| 1552 | _jit_name(block->_jit, __func__); |
| 1553 | rec_store(state, block, offset, jit_code_stxi_c, 0); |
| 1554 | } |
| 1555 | |
| 1556 | static void rec_SH(struct lightrec_cstate *state, |
| 1557 | const struct block *block, u16 offset) |
| 1558 | { |
| 1559 | _jit_name(block->_jit, __func__); |
| 1560 | rec_store(state, block, offset, |
| 1561 | jit_code_stxi_s, jit_code_bswapr_us); |
| 1562 | } |
| 1563 | |
| 1564 | static void rec_SW(struct lightrec_cstate *state, |
| 1565 | const struct block *block, u16 offset) |
| 1566 | |
| 1567 | { |
| 1568 | union code c = block->opcode_list[offset].c; |
| 1569 | |
| 1570 | _jit_name(block->_jit, c.i.op == OP_SWC2 ? "rec_SWC2" : "rec_SW"); |
| 1571 | rec_store(state, block, offset, |
| 1572 | jit_code_stxi_i, jit_code_bswapr_ui); |
| 1573 | } |
| 1574 | |
| 1575 | static void rec_SWL(struct lightrec_cstate *state, |
| 1576 | const struct block *block, u16 offset) |
| 1577 | { |
| 1578 | _jit_name(block->_jit, __func__); |
| 1579 | rec_io(state, block, offset, true, false); |
| 1580 | } |
| 1581 | |
| 1582 | static void rec_SWR(struct lightrec_cstate *state, |
| 1583 | const struct block *block, u16 offset) |
| 1584 | { |
| 1585 | _jit_name(block->_jit, __func__); |
| 1586 | rec_io(state, block, offset, true, false); |
| 1587 | } |
| 1588 | |
| 1589 | static void rec_load_memory(struct lightrec_cstate *cstate, |
| 1590 | const struct block *block, u16 offset, |
| 1591 | jit_code_t code, jit_code_t swap_code, bool is_unsigned, |
| 1592 | uintptr_t addr_offset, u32 addr_mask) |
| 1593 | { |
| 1594 | struct regcache *reg_cache = cstate->reg_cache; |
| 1595 | struct opcode *op = &block->opcode_list[offset]; |
| 1596 | bool load_delay = op_flag_load_delay(op->flags) && !cstate->no_load_delay; |
| 1597 | jit_state_t *_jit = block->_jit; |
| 1598 | u8 rs, rt, out_reg, addr_reg, flags = REG_EXT; |
| 1599 | bool no_mask = op_flag_no_mask(op->flags); |
| 1600 | union code c = op->c; |
| 1601 | s16 imm; |
| 1602 | |
| 1603 | if (load_delay || c.i.op == OP_LWC2) |
| 1604 | out_reg = REG_TEMP; |
| 1605 | else if (c.i.rt) |
| 1606 | out_reg = c.i.rt; |
| 1607 | else |
| 1608 | return; |
| 1609 | |
| 1610 | if (is_unsigned) |
| 1611 | flags |= REG_ZEXT; |
| 1612 | |
| 1613 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0); |
| 1614 | rt = lightrec_alloc_reg_out(reg_cache, _jit, out_reg, flags); |
| 1615 | |
| 1616 | if (!cstate->state->mirrors_mapped && c.i.imm && !no_mask) { |
| 1617 | jit_addi(rt, rs, (s16)c.i.imm); |
| 1618 | addr_reg = rt; |
| 1619 | imm = 0; |
| 1620 | } else { |
| 1621 | addr_reg = rs; |
| 1622 | imm = (s16)c.i.imm; |
| 1623 | } |
| 1624 | |
| 1625 | if (!no_mask) { |
| 1626 | jit_andi(rt, addr_reg, addr_mask); |
| 1627 | addr_reg = rt; |
| 1628 | } |
| 1629 | |
| 1630 | if (addr_offset) { |
| 1631 | jit_addi(rt, addr_reg, addr_offset); |
| 1632 | addr_reg = rt; |
| 1633 | } |
| 1634 | |
| 1635 | jit_new_node_www(code, rt, addr_reg, imm); |
| 1636 | |
| 1637 | if (is_big_endian() && swap_code) { |
| 1638 | jit_new_node_ww(swap_code, rt, rt); |
| 1639 | |
| 1640 | if (c.i.op == OP_LH) |
| 1641 | jit_extr_s(rt, rt); |
| 1642 | else if (c.i.op == OP_LW && __WORDSIZE == 64) |
| 1643 | jit_extr_i(rt, rt); |
| 1644 | } |
| 1645 | |
| 1646 | lightrec_free_reg(reg_cache, rs); |
| 1647 | lightrec_free_reg(reg_cache, rt); |
| 1648 | } |
| 1649 | |
| 1650 | static void rec_load_ram(struct lightrec_cstate *cstate, |
| 1651 | const struct block *block, u16 offset, |
| 1652 | jit_code_t code, jit_code_t swap_code, bool is_unsigned) |
| 1653 | { |
| 1654 | _jit_note(block->_jit, __FILE__, __LINE__); |
| 1655 | |
| 1656 | rec_load_memory(cstate, block, offset, code, swap_code, is_unsigned, |
| 1657 | cstate->state->offset_ram, rec_ram_mask(cstate->state)); |
| 1658 | } |
| 1659 | |
| 1660 | static void rec_load_bios(struct lightrec_cstate *cstate, |
| 1661 | const struct block *block, u16 offset, |
| 1662 | jit_code_t code, jit_code_t swap_code, bool is_unsigned) |
| 1663 | { |
| 1664 | _jit_note(block->_jit, __FILE__, __LINE__); |
| 1665 | |
| 1666 | rec_load_memory(cstate, block, offset, code, swap_code, is_unsigned, |
| 1667 | cstate->state->offset_bios, 0x1fffffff); |
| 1668 | } |
| 1669 | |
| 1670 | static void rec_load_scratch(struct lightrec_cstate *cstate, |
| 1671 | const struct block *block, u16 offset, |
| 1672 | jit_code_t code, jit_code_t swap_code, bool is_unsigned) |
| 1673 | { |
| 1674 | _jit_note(block->_jit, __FILE__, __LINE__); |
| 1675 | |
| 1676 | rec_load_memory(cstate, block, offset, code, swap_code, is_unsigned, |
| 1677 | cstate->state->offset_scratch, 0x1fffffff); |
| 1678 | } |
| 1679 | |
| 1680 | static void rec_load_io(struct lightrec_cstate *cstate, |
| 1681 | const struct block *block, u16 offset, |
| 1682 | jit_code_t code, jit_code_t swap_code, bool is_unsigned) |
| 1683 | { |
| 1684 | _jit_note(block->_jit, __FILE__, __LINE__); |
| 1685 | |
| 1686 | rec_load_memory(cstate, block, offset, code, swap_code, is_unsigned, |
| 1687 | cstate->state->offset_io, rec_io_mask(cstate->state)); |
| 1688 | } |
| 1689 | |
| 1690 | static void rec_load_direct(struct lightrec_cstate *cstate, |
| 1691 | const struct block *block, u16 offset, |
| 1692 | jit_code_t code, jit_code_t swap_code, |
| 1693 | bool is_unsigned) |
| 1694 | { |
| 1695 | struct lightrec_state *state = cstate->state; |
| 1696 | struct regcache *reg_cache = cstate->reg_cache; |
| 1697 | struct opcode *op = &block->opcode_list[offset]; |
| 1698 | bool load_delay = op_flag_load_delay(op->flags) && !cstate->no_load_delay; |
| 1699 | jit_state_t *_jit = block->_jit; |
| 1700 | jit_node_t *to_not_ram, *to_not_bios, *to_end, *to_end2; |
| 1701 | u8 tmp, rs, rt, out_reg, addr_reg, flags = REG_EXT; |
| 1702 | union code c = op->c; |
| 1703 | s16 imm; |
| 1704 | |
| 1705 | if (load_delay || c.i.op == OP_LWC2) |
| 1706 | out_reg = REG_TEMP; |
| 1707 | else if (c.i.rt) |
| 1708 | out_reg = c.i.rt; |
| 1709 | else |
| 1710 | return; |
| 1711 | |
| 1712 | if (is_unsigned) |
| 1713 | flags |= REG_ZEXT; |
| 1714 | |
| 1715 | jit_note(__FILE__, __LINE__); |
| 1716 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, 0); |
| 1717 | rt = lightrec_alloc_reg_out(reg_cache, _jit, out_reg, flags); |
| 1718 | |
| 1719 | if ((state->offset_ram == state->offset_bios && |
| 1720 | state->offset_ram == state->offset_scratch && |
| 1721 | state->mirrors_mapped) || !c.i.imm) { |
| 1722 | addr_reg = rs; |
| 1723 | imm = (s16)c.i.imm; |
| 1724 | } else { |
| 1725 | jit_addi(rt, rs, (s16)c.i.imm); |
| 1726 | addr_reg = rt; |
| 1727 | imm = 0; |
| 1728 | |
| 1729 | if (c.i.rs != c.i.rt) |
| 1730 | lightrec_free_reg(reg_cache, rs); |
| 1731 | } |
| 1732 | |
| 1733 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 1734 | |
| 1735 | if (state->offset_ram == state->offset_bios && |
| 1736 | state->offset_ram == state->offset_scratch) { |
| 1737 | if (!state->mirrors_mapped) { |
| 1738 | jit_andi(tmp, addr_reg, BIT(28)); |
| 1739 | jit_rshi_u(tmp, tmp, 28 - 22); |
| 1740 | jit_ori(tmp, tmp, 0x1f800000 | (RAM_SIZE - 1)); |
| 1741 | jit_andr(rt, addr_reg, tmp); |
| 1742 | } else { |
| 1743 | jit_andi(rt, addr_reg, 0x1fffffff); |
| 1744 | } |
| 1745 | |
| 1746 | if (state->offset_ram) |
| 1747 | jit_movi(tmp, state->offset_ram); |
| 1748 | } else { |
| 1749 | to_not_ram = jit_bmsi(addr_reg, BIT(28)); |
| 1750 | |
| 1751 | /* Convert to KUNSEG and avoid RAM mirrors */ |
| 1752 | jit_andi(rt, addr_reg, RAM_SIZE - 1); |
| 1753 | |
| 1754 | if (state->offset_ram) |
| 1755 | jit_movi(tmp, state->offset_ram); |
| 1756 | |
| 1757 | to_end = jit_b(); |
| 1758 | |
| 1759 | jit_patch(to_not_ram); |
| 1760 | |
| 1761 | if (state->offset_bios != state->offset_scratch) |
| 1762 | to_not_bios = jit_bmci(addr_reg, BIT(22)); |
| 1763 | |
| 1764 | /* Convert to KUNSEG */ |
| 1765 | jit_andi(rt, addr_reg, 0x1fc00000 | (BIOS_SIZE - 1)); |
| 1766 | |
| 1767 | jit_movi(tmp, state->offset_bios); |
| 1768 | |
| 1769 | if (state->offset_bios != state->offset_scratch) { |
| 1770 | to_end2 = jit_b(); |
| 1771 | |
| 1772 | jit_patch(to_not_bios); |
| 1773 | |
| 1774 | /* Convert to KUNSEG */ |
| 1775 | jit_andi(rt, addr_reg, 0x1f800fff); |
| 1776 | |
| 1777 | if (state->offset_scratch) |
| 1778 | jit_movi(tmp, state->offset_scratch); |
| 1779 | |
| 1780 | jit_patch(to_end2); |
| 1781 | } |
| 1782 | |
| 1783 | jit_patch(to_end); |
| 1784 | } |
| 1785 | |
| 1786 | if (state->offset_ram || state->offset_bios || state->offset_scratch) |
| 1787 | jit_addr(rt, rt, tmp); |
| 1788 | |
| 1789 | jit_new_node_www(code, rt, rt, imm); |
| 1790 | |
| 1791 | if (is_big_endian() && swap_code) { |
| 1792 | jit_new_node_ww(swap_code, rt, rt); |
| 1793 | |
| 1794 | if (c.i.op == OP_LH) |
| 1795 | jit_extr_s(rt, rt); |
| 1796 | else if (c.i.op == OP_LW && __WORDSIZE == 64) |
| 1797 | jit_extr_i(rt, rt); |
| 1798 | } |
| 1799 | |
| 1800 | lightrec_free_reg(reg_cache, addr_reg); |
| 1801 | lightrec_free_reg(reg_cache, rt); |
| 1802 | lightrec_free_reg(reg_cache, tmp); |
| 1803 | } |
| 1804 | |
| 1805 | static void rec_load(struct lightrec_cstate *state, const struct block *block, |
| 1806 | u16 offset, jit_code_t code, jit_code_t swap_code, |
| 1807 | bool is_unsigned) |
| 1808 | { |
| 1809 | const struct opcode *op = &block->opcode_list[offset]; |
| 1810 | u32 flags = op->flags; |
| 1811 | |
| 1812 | switch (LIGHTREC_FLAGS_GET_IO_MODE(flags)) { |
| 1813 | case LIGHTREC_IO_RAM: |
| 1814 | rec_load_ram(state, block, offset, code, swap_code, is_unsigned); |
| 1815 | break; |
| 1816 | case LIGHTREC_IO_BIOS: |
| 1817 | rec_load_bios(state, block, offset, code, swap_code, is_unsigned); |
| 1818 | break; |
| 1819 | case LIGHTREC_IO_SCRATCH: |
| 1820 | rec_load_scratch(state, block, offset, code, swap_code, is_unsigned); |
| 1821 | break; |
| 1822 | case LIGHTREC_IO_DIRECT_HW: |
| 1823 | rec_load_io(state, block, offset, code, swap_code, is_unsigned); |
| 1824 | break; |
| 1825 | case LIGHTREC_IO_DIRECT: |
| 1826 | rec_load_direct(state, block, offset, code, swap_code, is_unsigned); |
| 1827 | break; |
| 1828 | default: |
| 1829 | rec_io(state, block, offset, false, true); |
| 1830 | return; |
| 1831 | } |
| 1832 | |
| 1833 | if (op->i.op == OP_LWC2) { |
| 1834 | rec_cp2_do_mtc2(state, block, offset, op->i.rt, REG_TEMP); |
| 1835 | lightrec_discard_reg_if_loaded(state->reg_cache, REG_TEMP); |
| 1836 | } |
| 1837 | } |
| 1838 | |
| 1839 | static void rec_LB(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 1840 | { |
| 1841 | _jit_name(block->_jit, __func__); |
| 1842 | rec_load(state, block, offset, jit_code_ldxi_c, 0, false); |
| 1843 | } |
| 1844 | |
| 1845 | static void rec_LBU(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 1846 | { |
| 1847 | _jit_name(block->_jit, __func__); |
| 1848 | rec_load(state, block, offset, jit_code_ldxi_uc, 0, true); |
| 1849 | } |
| 1850 | |
| 1851 | static void rec_LH(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 1852 | { |
| 1853 | jit_code_t code = is_big_endian() ? jit_code_ldxi_us : jit_code_ldxi_s; |
| 1854 | |
| 1855 | _jit_name(block->_jit, __func__); |
| 1856 | rec_load(state, block, offset, code, jit_code_bswapr_us, false); |
| 1857 | } |
| 1858 | |
| 1859 | static void rec_LHU(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 1860 | { |
| 1861 | _jit_name(block->_jit, __func__); |
| 1862 | rec_load(state, block, offset, jit_code_ldxi_us, jit_code_bswapr_us, true); |
| 1863 | } |
| 1864 | |
| 1865 | static void rec_LWL(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 1866 | { |
| 1867 | _jit_name(block->_jit, __func__); |
| 1868 | rec_io(state, block, offset, true, true); |
| 1869 | } |
| 1870 | |
| 1871 | static void rec_LWR(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 1872 | { |
| 1873 | _jit_name(block->_jit, __func__); |
| 1874 | rec_io(state, block, offset, true, true); |
| 1875 | } |
| 1876 | |
| 1877 | static void rec_LW(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 1878 | { |
| 1879 | union code c = block->opcode_list[offset].c; |
| 1880 | jit_code_t code; |
| 1881 | |
| 1882 | if (is_big_endian() && __WORDSIZE == 64) |
| 1883 | code = jit_code_ldxi_ui; |
| 1884 | else |
| 1885 | code = jit_code_ldxi_i; |
| 1886 | |
| 1887 | _jit_name(block->_jit, c.i.op == OP_LWC2 ? "rec_LWC2" : "rec_LW"); |
| 1888 | rec_load(state, block, offset, code, jit_code_bswapr_ui, false); |
| 1889 | } |
| 1890 | |
| 1891 | static void rec_break_syscall(struct lightrec_cstate *state, |
| 1892 | const struct block *block, u16 offset, |
| 1893 | u32 exit_code) |
| 1894 | { |
| 1895 | struct regcache *reg_cache = state->reg_cache; |
| 1896 | jit_state_t *_jit = block->_jit; |
| 1897 | u8 tmp; |
| 1898 | |
| 1899 | _jit_note(block->_jit, __FILE__, __LINE__); |
| 1900 | |
| 1901 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 1902 | |
| 1903 | jit_movi(tmp, exit_code); |
| 1904 | jit_stxi_i(offsetof(struct lightrec_state, exit_flags), |
| 1905 | LIGHTREC_REG_STATE, tmp); |
| 1906 | |
| 1907 | jit_ldxi_i(tmp, LIGHTREC_REG_STATE, |
| 1908 | offsetof(struct lightrec_state, target_cycle)); |
| 1909 | jit_subr(tmp, tmp, LIGHTREC_REG_CYCLE); |
| 1910 | jit_movi(LIGHTREC_REG_CYCLE, 0); |
| 1911 | jit_stxi_i(offsetof(struct lightrec_state, target_cycle), |
| 1912 | LIGHTREC_REG_STATE, tmp); |
| 1913 | jit_stxi_i(offsetof(struct lightrec_state, current_cycle), |
| 1914 | LIGHTREC_REG_STATE, tmp); |
| 1915 | |
| 1916 | lightrec_free_reg(reg_cache, tmp); |
| 1917 | |
| 1918 | /* TODO: the return address should be "pc - 4" if we're a delay slot */ |
| 1919 | lightrec_emit_end_of_block(state, block, offset, -1, |
| 1920 | get_ds_pc(block, offset, 0), |
| 1921 | 31, 0, true); |
| 1922 | } |
| 1923 | |
| 1924 | static void rec_special_SYSCALL(struct lightrec_cstate *state, |
| 1925 | const struct block *block, u16 offset) |
| 1926 | { |
| 1927 | _jit_name(block->_jit, __func__); |
| 1928 | rec_break_syscall(state, block, offset, LIGHTREC_EXIT_SYSCALL); |
| 1929 | } |
| 1930 | |
| 1931 | static void rec_special_BREAK(struct lightrec_cstate *state, |
| 1932 | const struct block *block, u16 offset) |
| 1933 | { |
| 1934 | _jit_name(block->_jit, __func__); |
| 1935 | rec_break_syscall(state, block, offset, LIGHTREC_EXIT_BREAK); |
| 1936 | } |
| 1937 | |
| 1938 | static void rec_mfc(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 1939 | { |
| 1940 | struct regcache *reg_cache = state->reg_cache; |
| 1941 | union code c = block->opcode_list[offset].c; |
| 1942 | jit_state_t *_jit = block->_jit; |
| 1943 | |
| 1944 | jit_note(__FILE__, __LINE__); |
| 1945 | |
| 1946 | if (c.i.op != OP_SWC2) |
| 1947 | lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rt, true); |
| 1948 | |
| 1949 | call_to_c_wrapper(state, block, c.opcode, C_WRAPPER_MFC); |
| 1950 | } |
| 1951 | |
| 1952 | static void rec_mtc(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 1953 | { |
| 1954 | struct regcache *reg_cache = state->reg_cache; |
| 1955 | union code c = block->opcode_list[offset].c; |
| 1956 | jit_state_t *_jit = block->_jit; |
| 1957 | |
| 1958 | jit_note(__FILE__, __LINE__); |
| 1959 | lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rs, false); |
| 1960 | lightrec_clean_reg_if_loaded(reg_cache, _jit, c.i.rt, false); |
| 1961 | lightrec_clean_reg_if_loaded(reg_cache, _jit, REG_TEMP, false); |
| 1962 | |
| 1963 | call_to_c_wrapper(state, block, c.opcode, C_WRAPPER_MTC); |
| 1964 | |
| 1965 | if (c.i.op == OP_CP0 && |
| 1966 | !op_flag_no_ds(block->opcode_list[offset].flags) && |
| 1967 | (c.r.rd == 12 || c.r.rd == 13)) |
| 1968 | lightrec_emit_end_of_block(state, block, offset, -1, |
| 1969 | get_ds_pc(block, offset, 1), |
| 1970 | 0, 0, true); |
| 1971 | } |
| 1972 | |
| 1973 | static void |
| 1974 | rec_mfc0(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 1975 | { |
| 1976 | struct regcache *reg_cache = state->reg_cache; |
| 1977 | union code c = block->opcode_list[offset].c; |
| 1978 | jit_state_t *_jit = block->_jit; |
| 1979 | u8 rt; |
| 1980 | |
| 1981 | jit_note(__FILE__, __LINE__); |
| 1982 | |
| 1983 | rt = lightrec_alloc_reg_out(reg_cache, _jit, c.i.rt, REG_EXT); |
| 1984 | |
| 1985 | jit_ldxi_i(rt, LIGHTREC_REG_STATE, |
| 1986 | offsetof(struct lightrec_state, regs.cp0[c.r.rd])); |
| 1987 | |
| 1988 | lightrec_free_reg(reg_cache, rt); |
| 1989 | } |
| 1990 | |
| 1991 | static bool block_uses_icache(const struct lightrec_cstate *state, |
| 1992 | const struct block *block) |
| 1993 | { |
| 1994 | const struct lightrec_mem_map *map = &state->state->maps[PSX_MAP_KERNEL_USER_RAM]; |
| 1995 | u32 pc = kunseg(block->pc); |
| 1996 | |
| 1997 | if (pc < map->pc || pc >= map->pc + map->length) |
| 1998 | return false; |
| 1999 | |
| 2000 | return (block->pc >> 28) < 0xa; |
| 2001 | } |
| 2002 | |
| 2003 | static void |
| 2004 | rec_mtc0(struct lightrec_cstate *state, const struct block *block, u16 offset) |
| 2005 | { |
| 2006 | struct regcache *reg_cache = state->reg_cache; |
| 2007 | const union code c = block->opcode_list[offset].c; |
| 2008 | jit_state_t *_jit = block->_jit; |
| 2009 | u8 rt, tmp = 0, tmp2, status; |
| 2010 | jit_node_t *to_end; |
| 2011 | |
| 2012 | jit_note(__FILE__, __LINE__); |
| 2013 | |
| 2014 | switch(c.r.rd) { |
| 2015 | case 1: |
| 2016 | case 4: |
| 2017 | case 8: |
| 2018 | case 14: |
| 2019 | case 15: |
| 2020 | /* Those registers are read-only */ |
| 2021 | return; |
| 2022 | default: |
| 2023 | break; |
| 2024 | } |
| 2025 | |
| 2026 | if (!block_uses_icache(state, block) && c.r.rd == 12) { |
| 2027 | /* If we are not running code from the RAM through kuseg or |
| 2028 | * kseg0, handle writes to the Status register in C; as the |
| 2029 | * code may toggle bit 16 which isolates the cache. Code |
| 2030 | * running from kuseg or kseg0 in RAM cannot do that. */ |
| 2031 | rec_mtc(state, block, offset); |
| 2032 | return; |
| 2033 | } |
| 2034 | |
| 2035 | rt = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rt, 0); |
| 2036 | |
| 2037 | if (c.r.rd != 13) { |
| 2038 | jit_stxi_i(offsetof(struct lightrec_state, regs.cp0[c.r.rd]), |
| 2039 | LIGHTREC_REG_STATE, rt); |
| 2040 | } |
| 2041 | |
| 2042 | if (c.r.rd == 12 || c.r.rd == 13) { |
| 2043 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2044 | jit_ldxi_i(tmp, LIGHTREC_REG_STATE, |
| 2045 | offsetof(struct lightrec_state, regs.cp0[13])); |
| 2046 | |
| 2047 | tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2048 | } |
| 2049 | |
| 2050 | if (c.r.rd == 12) { |
| 2051 | status = rt; |
| 2052 | } else if (c.r.rd == 13) { |
| 2053 | /* Cause = (Cause & ~0x0300) | (value & 0x0300) */ |
| 2054 | jit_andi(tmp2, rt, 0x0300); |
| 2055 | jit_ori(tmp, tmp, 0x0300); |
| 2056 | jit_xori(tmp, tmp, 0x0300); |
| 2057 | jit_orr(tmp, tmp, tmp2); |
| 2058 | jit_ldxi_i(tmp2, LIGHTREC_REG_STATE, |
| 2059 | offsetof(struct lightrec_state, regs.cp0[12])); |
| 2060 | jit_stxi_i(offsetof(struct lightrec_state, regs.cp0[13]), |
| 2061 | LIGHTREC_REG_STATE, tmp); |
| 2062 | status = tmp2; |
| 2063 | } |
| 2064 | |
| 2065 | if (c.r.rd == 12 || c.r.rd == 13) { |
| 2066 | /* Exit dynarec in case there's a software interrupt. |
| 2067 | * exit_flags = !!(status & tmp & 0x0300) & status; */ |
| 2068 | jit_andr(tmp, tmp, status); |
| 2069 | jit_andi(tmp, tmp, 0x0300); |
| 2070 | jit_nei(tmp, tmp, 0); |
| 2071 | jit_andr(tmp, tmp, status); |
| 2072 | } |
| 2073 | |
| 2074 | if (c.r.rd == 12) { |
| 2075 | /* Exit dynarec in case we unmask a hardware interrupt. |
| 2076 | * exit_flags = !(~status & 0x401) */ |
| 2077 | |
| 2078 | jit_comr(tmp2, status); |
| 2079 | jit_andi(tmp2, tmp2, 0x401); |
| 2080 | jit_eqi(tmp2, tmp2, 0); |
| 2081 | jit_orr(tmp, tmp, tmp2); |
| 2082 | } |
| 2083 | |
| 2084 | lightrec_free_reg(reg_cache, rt); |
| 2085 | |
| 2086 | if (c.r.rd == 12 || c.r.rd == 13) { |
| 2087 | to_end = jit_beqi(tmp, 0); |
| 2088 | |
| 2089 | jit_ldxi_i(tmp2, LIGHTREC_REG_STATE, |
| 2090 | offsetof(struct lightrec_state, target_cycle)); |
| 2091 | jit_subr(tmp2, tmp2, LIGHTREC_REG_CYCLE); |
| 2092 | jit_movi(LIGHTREC_REG_CYCLE, 0); |
| 2093 | jit_stxi_i(offsetof(struct lightrec_state, target_cycle), |
| 2094 | LIGHTREC_REG_STATE, tmp2); |
| 2095 | jit_stxi_i(offsetof(struct lightrec_state, current_cycle), |
| 2096 | LIGHTREC_REG_STATE, tmp2); |
| 2097 | |
| 2098 | |
| 2099 | jit_patch(to_end); |
| 2100 | } |
| 2101 | |
| 2102 | if (!op_flag_no_ds(block->opcode_list[offset].flags) && |
| 2103 | (c.r.rd == 12 || c.r.rd == 13)) { |
| 2104 | state->cycles += lightrec_cycles_of_opcode(c); |
| 2105 | lightrec_emit_eob(state, block, offset + 1); |
| 2106 | } |
| 2107 | } |
| 2108 | |
| 2109 | static void rec_cp0_MFC0(struct lightrec_cstate *state, |
| 2110 | const struct block *block, u16 offset) |
| 2111 | { |
| 2112 | _jit_name(block->_jit, __func__); |
| 2113 | rec_mfc0(state, block, offset); |
| 2114 | } |
| 2115 | |
| 2116 | static void rec_cp0_CFC0(struct lightrec_cstate *state, |
| 2117 | const struct block *block, u16 offset) |
| 2118 | { |
| 2119 | _jit_name(block->_jit, __func__); |
| 2120 | rec_mfc0(state, block, offset); |
| 2121 | } |
| 2122 | |
| 2123 | static void rec_cp0_MTC0(struct lightrec_cstate *state, |
| 2124 | const struct block *block, u16 offset) |
| 2125 | { |
| 2126 | _jit_name(block->_jit, __func__); |
| 2127 | rec_mtc0(state, block, offset); |
| 2128 | } |
| 2129 | |
| 2130 | static void rec_cp0_CTC0(struct lightrec_cstate *state, |
| 2131 | const struct block *block, u16 offset) |
| 2132 | { |
| 2133 | _jit_name(block->_jit, __func__); |
| 2134 | rec_mtc0(state, block, offset); |
| 2135 | } |
| 2136 | |
| 2137 | static unsigned int cp2d_i_offset(u8 reg) |
| 2138 | { |
| 2139 | return offsetof(struct lightrec_state, regs.cp2d[reg]); |
| 2140 | } |
| 2141 | |
| 2142 | static unsigned int cp2d_s_offset(u8 reg) |
| 2143 | { |
| 2144 | return cp2d_i_offset(reg) + is_big_endian() * 2; |
| 2145 | } |
| 2146 | |
| 2147 | static unsigned int cp2c_i_offset(u8 reg) |
| 2148 | { |
| 2149 | return offsetof(struct lightrec_state, regs.cp2c[reg]); |
| 2150 | } |
| 2151 | |
| 2152 | static unsigned int cp2c_s_offset(u8 reg) |
| 2153 | { |
| 2154 | return cp2c_i_offset(reg) + is_big_endian() * 2; |
| 2155 | } |
| 2156 | |
| 2157 | static void rec_cp2_do_mfc2(struct lightrec_cstate *state, |
| 2158 | const struct block *block, u16 offset, |
| 2159 | u8 reg, u8 out_reg) |
| 2160 | { |
| 2161 | struct regcache *reg_cache = state->reg_cache; |
| 2162 | jit_state_t *_jit = block->_jit; |
| 2163 | const u32 zext_regs = 0x300f0080; |
| 2164 | u8 rt, tmp, tmp2, tmp3, out, flags; |
| 2165 | unsigned int i; |
| 2166 | |
| 2167 | _jit_name(block->_jit, __func__); |
| 2168 | |
| 2169 | if (state->state->ops.cop2_notify) { |
| 2170 | /* We must call cop2_notify, handle that in C. */ |
| 2171 | rec_mfc(state, block, offset); |
| 2172 | return; |
| 2173 | } |
| 2174 | |
| 2175 | flags = (zext_regs & BIT(reg)) ? REG_ZEXT : REG_EXT; |
| 2176 | rt = lightrec_alloc_reg_out(reg_cache, _jit, out_reg, flags); |
| 2177 | |
| 2178 | if (reg == 15) |
| 2179 | reg = 14; |
| 2180 | |
| 2181 | switch (reg) { |
| 2182 | case 1: |
| 2183 | case 3: |
| 2184 | case 5: |
| 2185 | case 8: |
| 2186 | case 9: |
| 2187 | case 10: |
| 2188 | case 11: |
| 2189 | jit_ldxi_s(rt, LIGHTREC_REG_STATE, cp2d_s_offset(reg)); |
| 2190 | break; |
| 2191 | case 7: |
| 2192 | case 16: |
| 2193 | case 17: |
| 2194 | case 18: |
| 2195 | case 19: |
| 2196 | jit_ldxi_us(rt, LIGHTREC_REG_STATE, cp2d_s_offset(reg)); |
| 2197 | break; |
| 2198 | case 28: |
| 2199 | case 29: |
| 2200 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2201 | tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2202 | tmp3 = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2203 | |
| 2204 | for (i = 0; i < 3; i++) { |
| 2205 | out = i == 0 ? rt : tmp; |
| 2206 | |
| 2207 | jit_ldxi_s(tmp, LIGHTREC_REG_STATE, cp2d_s_offset(9 + i)); |
| 2208 | jit_movi(tmp2, 0x1f); |
| 2209 | jit_rshi(out, tmp, 7); |
| 2210 | |
| 2211 | jit_ltr(tmp3, tmp2, out); |
| 2212 | jit_movnr(out, tmp2, tmp3); |
| 2213 | |
| 2214 | jit_gei(tmp2, out, 0); |
| 2215 | jit_movzr(out, tmp2, tmp2); |
| 2216 | |
| 2217 | if (i > 0) { |
| 2218 | jit_lshi(tmp, tmp, 5 * i); |
| 2219 | jit_orr(rt, rt, tmp); |
| 2220 | } |
| 2221 | } |
| 2222 | |
| 2223 | |
| 2224 | lightrec_free_reg(reg_cache, tmp); |
| 2225 | lightrec_free_reg(reg_cache, tmp2); |
| 2226 | lightrec_free_reg(reg_cache, tmp3); |
| 2227 | break; |
| 2228 | default: |
| 2229 | jit_ldxi_i(rt, LIGHTREC_REG_STATE, cp2d_i_offset(reg)); |
| 2230 | break; |
| 2231 | } |
| 2232 | |
| 2233 | lightrec_free_reg(reg_cache, rt); |
| 2234 | } |
| 2235 | |
| 2236 | static void rec_cp2_basic_MFC2(struct lightrec_cstate *state, |
| 2237 | const struct block *block, u16 offset) |
| 2238 | { |
| 2239 | const union code c = block->opcode_list[offset].c; |
| 2240 | |
| 2241 | rec_cp2_do_mfc2(state, block, offset, c.r.rd, c.r.rt); |
| 2242 | } |
| 2243 | |
| 2244 | static void rec_cp2_basic_CFC2(struct lightrec_cstate *state, |
| 2245 | const struct block *block, u16 offset) |
| 2246 | { |
| 2247 | struct regcache *reg_cache = state->reg_cache; |
| 2248 | const union code c = block->opcode_list[offset].c; |
| 2249 | jit_state_t *_jit = block->_jit; |
| 2250 | u8 rt; |
| 2251 | |
| 2252 | _jit_name(block->_jit, __func__); |
| 2253 | |
| 2254 | if (state->state->ops.cop2_notify) { |
| 2255 | /* We must call cop2_notify, handle that in C. */ |
| 2256 | rec_mfc(state, block, offset); |
| 2257 | return; |
| 2258 | } |
| 2259 | |
| 2260 | switch (c.r.rd) { |
| 2261 | case 4: |
| 2262 | case 12: |
| 2263 | case 20: |
| 2264 | case 26: |
| 2265 | case 27: |
| 2266 | case 29: |
| 2267 | case 30: |
| 2268 | rt = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rt, REG_EXT); |
| 2269 | jit_ldxi_s(rt, LIGHTREC_REG_STATE, cp2c_s_offset(c.r.rd)); |
| 2270 | break; |
| 2271 | default: |
| 2272 | rt = lightrec_alloc_reg_out(reg_cache, _jit, c.r.rt, REG_ZEXT); |
| 2273 | jit_ldxi_ui(rt, LIGHTREC_REG_STATE, cp2c_i_offset(c.r.rd)); |
| 2274 | break; |
| 2275 | } |
| 2276 | |
| 2277 | lightrec_free_reg(reg_cache, rt); |
| 2278 | } |
| 2279 | |
| 2280 | static void rec_cp2_do_mtc2(struct lightrec_cstate *state, |
| 2281 | const struct block *block, u16 offset, |
| 2282 | u8 reg, u8 in_reg) |
| 2283 | { |
| 2284 | struct regcache *reg_cache = state->reg_cache; |
| 2285 | jit_state_t *_jit = block->_jit; |
| 2286 | u8 rt, tmp, tmp2, flags = 0; |
| 2287 | |
| 2288 | _jit_name(block->_jit, __func__); |
| 2289 | |
| 2290 | if (state->state->ops.cop2_notify) { |
| 2291 | /* We must call cop2_notify, handle that in C. */ |
| 2292 | rec_mtc(state, block, offset); |
| 2293 | return; |
| 2294 | } |
| 2295 | |
| 2296 | if (reg == 31) |
| 2297 | return; |
| 2298 | |
| 2299 | if (reg == 30) |
| 2300 | flags |= REG_EXT; |
| 2301 | |
| 2302 | rt = lightrec_alloc_reg_in(reg_cache, _jit, in_reg, flags); |
| 2303 | |
| 2304 | switch (reg) { |
| 2305 | case 15: |
| 2306 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2307 | jit_ldxi_i(tmp, LIGHTREC_REG_STATE, cp2d_i_offset(13)); |
| 2308 | |
| 2309 | tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2310 | jit_ldxi_i(tmp2, LIGHTREC_REG_STATE, cp2d_i_offset(14)); |
| 2311 | |
| 2312 | jit_stxi_i(cp2d_i_offset(12), LIGHTREC_REG_STATE, tmp); |
| 2313 | jit_stxi_i(cp2d_i_offset(13), LIGHTREC_REG_STATE, tmp2); |
| 2314 | jit_stxi_i(cp2d_i_offset(14), LIGHTREC_REG_STATE, rt); |
| 2315 | |
| 2316 | lightrec_free_reg(reg_cache, tmp); |
| 2317 | lightrec_free_reg(reg_cache, tmp2); |
| 2318 | break; |
| 2319 | case 28: |
| 2320 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2321 | |
| 2322 | jit_lshi(tmp, rt, 7); |
| 2323 | jit_andi(tmp, tmp, 0xf80); |
| 2324 | jit_stxi_s(cp2d_s_offset(9), LIGHTREC_REG_STATE, tmp); |
| 2325 | |
| 2326 | jit_lshi(tmp, rt, 2); |
| 2327 | jit_andi(tmp, tmp, 0xf80); |
| 2328 | jit_stxi_s(cp2d_s_offset(10), LIGHTREC_REG_STATE, tmp); |
| 2329 | |
| 2330 | jit_rshi(tmp, rt, 3); |
| 2331 | jit_andi(tmp, tmp, 0xf80); |
| 2332 | jit_stxi_s(cp2d_s_offset(11), LIGHTREC_REG_STATE, tmp); |
| 2333 | |
| 2334 | lightrec_free_reg(reg_cache, tmp); |
| 2335 | break; |
| 2336 | case 30: |
| 2337 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2338 | |
| 2339 | /* if (rt < 0) rt = ~rt; */ |
| 2340 | jit_rshi(tmp, rt, 31); |
| 2341 | jit_xorr(tmp, rt, tmp); |
| 2342 | |
| 2343 | /* Count leading zeros */ |
| 2344 | jit_clzr(tmp, tmp); |
| 2345 | if (__WORDSIZE != 32) |
| 2346 | jit_subi(tmp, tmp, __WORDSIZE - 32); |
| 2347 | |
| 2348 | jit_stxi_i(cp2d_i_offset(31), LIGHTREC_REG_STATE, tmp); |
| 2349 | |
| 2350 | lightrec_free_reg(reg_cache, tmp); |
| 2351 | fallthrough; |
| 2352 | default: |
| 2353 | jit_stxi_i(cp2d_i_offset(reg), LIGHTREC_REG_STATE, rt); |
| 2354 | break; |
| 2355 | } |
| 2356 | |
| 2357 | lightrec_free_reg(reg_cache, rt); |
| 2358 | } |
| 2359 | |
| 2360 | static void rec_cp2_basic_MTC2(struct lightrec_cstate *state, |
| 2361 | const struct block *block, u16 offset) |
| 2362 | { |
| 2363 | const union code c = block->opcode_list[offset].c; |
| 2364 | |
| 2365 | rec_cp2_do_mtc2(state, block, offset, c.r.rd, c.r.rt); |
| 2366 | } |
| 2367 | |
| 2368 | static void rec_cp2_basic_CTC2(struct lightrec_cstate *state, |
| 2369 | const struct block *block, u16 offset) |
| 2370 | { |
| 2371 | struct regcache *reg_cache = state->reg_cache; |
| 2372 | const union code c = block->opcode_list[offset].c; |
| 2373 | jit_state_t *_jit = block->_jit; |
| 2374 | u8 rt, tmp, tmp2; |
| 2375 | |
| 2376 | _jit_name(block->_jit, __func__); |
| 2377 | |
| 2378 | if (state->state->ops.cop2_notify) { |
| 2379 | /* We must call cop2_notify, handle that in C. */ |
| 2380 | rec_mtc(state, block, offset); |
| 2381 | return; |
| 2382 | } |
| 2383 | |
| 2384 | rt = lightrec_alloc_reg_in(reg_cache, _jit, c.r.rt, 0); |
| 2385 | |
| 2386 | switch (c.r.rd) { |
| 2387 | case 4: |
| 2388 | case 12: |
| 2389 | case 20: |
| 2390 | case 26: |
| 2391 | case 27: |
| 2392 | case 29: |
| 2393 | case 30: |
| 2394 | jit_stxi_s(cp2c_s_offset(c.r.rd), LIGHTREC_REG_STATE, rt); |
| 2395 | break; |
| 2396 | case 31: |
| 2397 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2398 | tmp2 = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2399 | |
| 2400 | jit_andi(tmp, rt, 0x7f87e000); |
| 2401 | jit_nei(tmp, tmp, 0); |
| 2402 | jit_lshi(tmp, tmp, 31); |
| 2403 | |
| 2404 | jit_andi(tmp2, rt, 0x7ffff000); |
| 2405 | jit_orr(tmp, tmp2, tmp); |
| 2406 | |
| 2407 | jit_stxi_i(cp2c_i_offset(31), LIGHTREC_REG_STATE, tmp); |
| 2408 | |
| 2409 | lightrec_free_reg(reg_cache, tmp); |
| 2410 | lightrec_free_reg(reg_cache, tmp2); |
| 2411 | break; |
| 2412 | |
| 2413 | default: |
| 2414 | jit_stxi_i(cp2c_i_offset(c.r.rd), LIGHTREC_REG_STATE, rt); |
| 2415 | } |
| 2416 | |
| 2417 | lightrec_free_reg(reg_cache, rt); |
| 2418 | } |
| 2419 | |
| 2420 | static void rec_cp0_RFE(struct lightrec_cstate *state, |
| 2421 | const struct block *block, u16 offset) |
| 2422 | { |
| 2423 | struct regcache *reg_cache = state->reg_cache; |
| 2424 | jit_state_t *_jit = block->_jit; |
| 2425 | u8 status, tmp; |
| 2426 | |
| 2427 | jit_name(__func__); |
| 2428 | jit_note(__FILE__, __LINE__); |
| 2429 | |
| 2430 | status = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2431 | jit_ldxi_i(status, LIGHTREC_REG_STATE, |
| 2432 | offsetof(struct lightrec_state, regs.cp0[12])); |
| 2433 | |
| 2434 | tmp = lightrec_alloc_reg_temp(reg_cache, _jit); |
| 2435 | |
| 2436 | /* status = ((status >> 2) & 0xf) | status & ~0xf; */ |
| 2437 | jit_rshi(tmp, status, 2); |
| 2438 | jit_andi(tmp, tmp, 0xf); |
| 2439 | jit_andi(status, status, ~0xful); |
| 2440 | jit_orr(status, status, tmp); |
| 2441 | |
| 2442 | jit_ldxi_i(tmp, LIGHTREC_REG_STATE, |
| 2443 | offsetof(struct lightrec_state, regs.cp0[13])); |
| 2444 | jit_stxi_i(offsetof(struct lightrec_state, regs.cp0[12]), |
| 2445 | LIGHTREC_REG_STATE, status); |
| 2446 | |
| 2447 | /* Exit dynarec in case there's a software interrupt. |
| 2448 | * exit_flags = !!(status & cause & 0x0300) & status; */ |
| 2449 | jit_andr(tmp, tmp, status); |
| 2450 | jit_andi(tmp, tmp, 0x0300); |
| 2451 | jit_nei(tmp, tmp, 0); |
| 2452 | jit_andr(tmp, tmp, status); |
| 2453 | jit_stxi_i(offsetof(struct lightrec_state, exit_flags), |
| 2454 | LIGHTREC_REG_STATE, tmp); |
| 2455 | |
| 2456 | lightrec_free_reg(reg_cache, status); |
| 2457 | lightrec_free_reg(reg_cache, tmp); |
| 2458 | } |
| 2459 | |
| 2460 | static void rec_CP(struct lightrec_cstate *state, |
| 2461 | const struct block *block, u16 offset) |
| 2462 | { |
| 2463 | union code c = block->opcode_list[offset].c; |
| 2464 | jit_state_t *_jit = block->_jit; |
| 2465 | |
| 2466 | jit_name(__func__); |
| 2467 | jit_note(__FILE__, __LINE__); |
| 2468 | |
| 2469 | call_to_c_wrapper(state, block, c.opcode, C_WRAPPER_CP); |
| 2470 | } |
| 2471 | |
| 2472 | static void rec_meta_MOV(struct lightrec_cstate *state, |
| 2473 | const struct block *block, u16 offset) |
| 2474 | { |
| 2475 | struct regcache *reg_cache = state->reg_cache; |
| 2476 | const struct opcode *op = &block->opcode_list[offset]; |
| 2477 | union code c = op->c; |
| 2478 | jit_state_t *_jit = block->_jit; |
| 2479 | bool unload_rd; |
| 2480 | u8 rs, rd; |
| 2481 | |
| 2482 | _jit_name(block->_jit, __func__); |
| 2483 | jit_note(__FILE__, __LINE__); |
| 2484 | |
| 2485 | unload_rd = OPT_EARLY_UNLOAD |
| 2486 | && LIGHTREC_FLAGS_GET_RD(op->flags) == LIGHTREC_REG_UNLOAD; |
| 2487 | |
| 2488 | if (c.m.rs && !lightrec_reg_is_loaded(reg_cache, c.m.rs)) { |
| 2489 | /* The source register is not yet loaded - we can load its value |
| 2490 | * from the register cache directly into the target register. */ |
| 2491 | rd = lightrec_alloc_reg_out(reg_cache, _jit, c.m.rd, REG_EXT); |
| 2492 | |
| 2493 | jit_ldxi_i(rd, LIGHTREC_REG_STATE, |
| 2494 | offsetof(struct lightrec_state, regs.gpr) + (c.m.rs << 2)); |
| 2495 | |
| 2496 | lightrec_free_reg(reg_cache, rd); |
| 2497 | } else if (unload_rd) { |
| 2498 | /* If the destination register will be unloaded right after the |
| 2499 | * MOV meta-opcode, we don't actually need to write any host |
| 2500 | * register - we can just store the source register directly to |
| 2501 | * the register cache, at the offset corresponding to the |
| 2502 | * destination register. */ |
| 2503 | lightrec_discard_reg_if_loaded(reg_cache, c.m.rd); |
| 2504 | |
| 2505 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.m.rs, 0); |
| 2506 | |
| 2507 | jit_stxi_i(offsetof(struct lightrec_state, regs.gpr) |
| 2508 | + (c.m.rd << 2), LIGHTREC_REG_STATE, rs); |
| 2509 | |
| 2510 | lightrec_free_reg(reg_cache, rs); |
| 2511 | } else { |
| 2512 | if (c.m.rs) |
| 2513 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.m.rs, 0); |
| 2514 | |
| 2515 | rd = lightrec_alloc_reg_out(reg_cache, _jit, c.m.rd, REG_EXT); |
| 2516 | |
| 2517 | if (c.m.rs == 0) { |
| 2518 | jit_movi(rd, 0); |
| 2519 | } else { |
| 2520 | jit_extr_i(rd, rs); |
| 2521 | lightrec_free_reg(reg_cache, rs); |
| 2522 | } |
| 2523 | |
| 2524 | lightrec_free_reg(reg_cache, rd); |
| 2525 | } |
| 2526 | } |
| 2527 | |
| 2528 | static void rec_meta_EXTC_EXTS(struct lightrec_cstate *state, |
| 2529 | const struct block *block, |
| 2530 | u16 offset) |
| 2531 | { |
| 2532 | struct regcache *reg_cache = state->reg_cache; |
| 2533 | union code c = block->opcode_list[offset].c; |
| 2534 | jit_state_t *_jit = block->_jit; |
| 2535 | u8 rs, rd; |
| 2536 | |
| 2537 | _jit_name(block->_jit, __func__); |
| 2538 | jit_note(__FILE__, __LINE__); |
| 2539 | |
| 2540 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.m.rs, 0); |
| 2541 | rd = lightrec_alloc_reg_out(reg_cache, _jit, c.m.rd, REG_EXT); |
| 2542 | |
| 2543 | if (c.m.op == OP_META_EXTC) |
| 2544 | jit_extr_c(rd, rs); |
| 2545 | else |
| 2546 | jit_extr_s(rd, rs); |
| 2547 | |
| 2548 | lightrec_free_reg(reg_cache, rs); |
| 2549 | lightrec_free_reg(reg_cache, rd); |
| 2550 | } |
| 2551 | |
| 2552 | static void rec_meta_MULT2(struct lightrec_cstate *state, |
| 2553 | const struct block *block, |
| 2554 | u16 offset) |
| 2555 | { |
| 2556 | struct regcache *reg_cache = state->reg_cache; |
| 2557 | union code c = block->opcode_list[offset].c; |
| 2558 | jit_state_t *_jit = block->_jit; |
| 2559 | u8 reg_lo = get_mult_div_lo(c); |
| 2560 | u8 reg_hi = get_mult_div_hi(c); |
| 2561 | u32 flags = block->opcode_list[offset].flags; |
| 2562 | bool is_signed = c.i.op == OP_META_MULT2; |
| 2563 | u8 rs, lo, hi, rflags = 0, hiflags = 0; |
| 2564 | unsigned int i; |
| 2565 | |
| 2566 | if (!op_flag_no_hi(flags) && c.r.op < 32) { |
| 2567 | rflags = is_signed ? REG_EXT : REG_ZEXT; |
| 2568 | hiflags = is_signed ? REG_EXT : (REG_EXT | REG_ZEXT); |
| 2569 | } |
| 2570 | |
| 2571 | _jit_name(block->_jit, __func__); |
| 2572 | jit_note(__FILE__, __LINE__); |
| 2573 | |
| 2574 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.i.rs, rflags); |
| 2575 | |
| 2576 | /* |
| 2577 | * We must handle the case where one of the output registers is our rs |
| 2578 | * input register. Thanksfully, computing LO/HI can be done in any |
| 2579 | * order. Here, we make sure that the computation that overwrites the |
| 2580 | * input register is always performed last. |
| 2581 | */ |
| 2582 | for (i = 0; i < 2; i++) { |
| 2583 | if ((!i ^ (reg_lo == c.i.rs)) && !op_flag_no_lo(flags)) { |
| 2584 | lo = lightrec_alloc_reg_out(reg_cache, _jit, reg_lo, 0); |
| 2585 | |
| 2586 | if (c.r.op < 32) |
| 2587 | jit_lshi(lo, rs, c.r.op); |
| 2588 | else |
| 2589 | jit_movi(lo, 0); |
| 2590 | |
| 2591 | lightrec_free_reg(reg_cache, lo); |
| 2592 | continue; |
| 2593 | } |
| 2594 | |
| 2595 | if ((!!i ^ (reg_lo == c.i.rs)) && !op_flag_no_hi(flags)) { |
| 2596 | hi = lightrec_alloc_reg_out(reg_cache, _jit, |
| 2597 | reg_hi, hiflags); |
| 2598 | |
| 2599 | if (c.r.op >= 32) |
| 2600 | jit_lshi(hi, rs, c.r.op - 32); |
| 2601 | else if (is_signed) |
| 2602 | jit_rshi(hi, rs, 32 - c.r.op); |
| 2603 | else |
| 2604 | jit_rshi_u(hi, rs, 32 - c.r.op); |
| 2605 | |
| 2606 | lightrec_free_reg(reg_cache, hi); |
| 2607 | } |
| 2608 | } |
| 2609 | |
| 2610 | lightrec_free_reg(reg_cache, rs); |
| 2611 | |
| 2612 | _jit_name(block->_jit, __func__); |
| 2613 | jit_note(__FILE__, __LINE__); |
| 2614 | } |
| 2615 | |
| 2616 | static void rec_meta_COM(struct lightrec_cstate *state, |
| 2617 | const struct block *block, u16 offset) |
| 2618 | { |
| 2619 | struct regcache *reg_cache = state->reg_cache; |
| 2620 | union code c = block->opcode_list[offset].c; |
| 2621 | jit_state_t *_jit = block->_jit; |
| 2622 | u8 rd, rs, flags; |
| 2623 | |
| 2624 | jit_note(__FILE__, __LINE__); |
| 2625 | rs = lightrec_alloc_reg_in(reg_cache, _jit, c.m.rs, 0); |
| 2626 | rd = lightrec_alloc_reg_out(reg_cache, _jit, c.m.rd, 0); |
| 2627 | |
| 2628 | flags = lightrec_get_reg_in_flags(reg_cache, rs); |
| 2629 | |
| 2630 | lightrec_set_reg_out_flags(reg_cache, rd, |
| 2631 | flags & REG_EXT); |
| 2632 | |
| 2633 | jit_comr(rd, rs); |
| 2634 | |
| 2635 | lightrec_free_reg(reg_cache, rs); |
| 2636 | lightrec_free_reg(reg_cache, rd); |
| 2637 | } |
| 2638 | |
| 2639 | static const lightrec_rec_func_t rec_standard[64] = { |
| 2640 | SET_DEFAULT_ELM(rec_standard, unknown_opcode), |
| 2641 | [OP_SPECIAL] = rec_SPECIAL, |
| 2642 | [OP_REGIMM] = rec_REGIMM, |
| 2643 | [OP_J] = rec_J, |
| 2644 | [OP_JAL] = rec_JAL, |
| 2645 | [OP_BEQ] = rec_BEQ, |
| 2646 | [OP_BNE] = rec_BNE, |
| 2647 | [OP_BLEZ] = rec_BLEZ, |
| 2648 | [OP_BGTZ] = rec_BGTZ, |
| 2649 | [OP_ADDI] = rec_ADDI, |
| 2650 | [OP_ADDIU] = rec_ADDIU, |
| 2651 | [OP_SLTI] = rec_SLTI, |
| 2652 | [OP_SLTIU] = rec_SLTIU, |
| 2653 | [OP_ANDI] = rec_ANDI, |
| 2654 | [OP_ORI] = rec_ORI, |
| 2655 | [OP_XORI] = rec_XORI, |
| 2656 | [OP_LUI] = rec_LUI, |
| 2657 | [OP_CP0] = rec_CP0, |
| 2658 | [OP_CP2] = rec_CP2, |
| 2659 | [OP_LB] = rec_LB, |
| 2660 | [OP_LH] = rec_LH, |
| 2661 | [OP_LWL] = rec_LWL, |
| 2662 | [OP_LW] = rec_LW, |
| 2663 | [OP_LBU] = rec_LBU, |
| 2664 | [OP_LHU] = rec_LHU, |
| 2665 | [OP_LWR] = rec_LWR, |
| 2666 | [OP_SB] = rec_SB, |
| 2667 | [OP_SH] = rec_SH, |
| 2668 | [OP_SWL] = rec_SWL, |
| 2669 | [OP_SW] = rec_SW, |
| 2670 | [OP_SWR] = rec_SWR, |
| 2671 | [OP_LWC2] = rec_LW, |
| 2672 | [OP_SWC2] = rec_SW, |
| 2673 | |
| 2674 | [OP_META] = rec_META, |
| 2675 | [OP_META_MULT2] = rec_meta_MULT2, |
| 2676 | [OP_META_MULTU2] = rec_meta_MULT2, |
| 2677 | }; |
| 2678 | |
| 2679 | static const lightrec_rec_func_t rec_special[64] = { |
| 2680 | SET_DEFAULT_ELM(rec_special, unknown_opcode), |
| 2681 | [OP_SPECIAL_SLL] = rec_special_SLL, |
| 2682 | [OP_SPECIAL_SRL] = rec_special_SRL, |
| 2683 | [OP_SPECIAL_SRA] = rec_special_SRA, |
| 2684 | [OP_SPECIAL_SLLV] = rec_special_SLLV, |
| 2685 | [OP_SPECIAL_SRLV] = rec_special_SRLV, |
| 2686 | [OP_SPECIAL_SRAV] = rec_special_SRAV, |
| 2687 | [OP_SPECIAL_JR] = rec_special_JR, |
| 2688 | [OP_SPECIAL_JALR] = rec_special_JALR, |
| 2689 | [OP_SPECIAL_SYSCALL] = rec_special_SYSCALL, |
| 2690 | [OP_SPECIAL_BREAK] = rec_special_BREAK, |
| 2691 | [OP_SPECIAL_MFHI] = rec_special_MFHI, |
| 2692 | [OP_SPECIAL_MTHI] = rec_special_MTHI, |
| 2693 | [OP_SPECIAL_MFLO] = rec_special_MFLO, |
| 2694 | [OP_SPECIAL_MTLO] = rec_special_MTLO, |
| 2695 | [OP_SPECIAL_MULT] = rec_special_MULT, |
| 2696 | [OP_SPECIAL_MULTU] = rec_special_MULTU, |
| 2697 | [OP_SPECIAL_DIV] = rec_special_DIV, |
| 2698 | [OP_SPECIAL_DIVU] = rec_special_DIVU, |
| 2699 | [OP_SPECIAL_ADD] = rec_special_ADD, |
| 2700 | [OP_SPECIAL_ADDU] = rec_special_ADDU, |
| 2701 | [OP_SPECIAL_SUB] = rec_special_SUB, |
| 2702 | [OP_SPECIAL_SUBU] = rec_special_SUBU, |
| 2703 | [OP_SPECIAL_AND] = rec_special_AND, |
| 2704 | [OP_SPECIAL_OR] = rec_special_OR, |
| 2705 | [OP_SPECIAL_XOR] = rec_special_XOR, |
| 2706 | [OP_SPECIAL_NOR] = rec_special_NOR, |
| 2707 | [OP_SPECIAL_SLT] = rec_special_SLT, |
| 2708 | [OP_SPECIAL_SLTU] = rec_special_SLTU, |
| 2709 | }; |
| 2710 | |
| 2711 | static const lightrec_rec_func_t rec_regimm[64] = { |
| 2712 | SET_DEFAULT_ELM(rec_regimm, unknown_opcode), |
| 2713 | [OP_REGIMM_BLTZ] = rec_regimm_BLTZ, |
| 2714 | [OP_REGIMM_BGEZ] = rec_regimm_BGEZ, |
| 2715 | [OP_REGIMM_BLTZAL] = rec_regimm_BLTZAL, |
| 2716 | [OP_REGIMM_BGEZAL] = rec_regimm_BGEZAL, |
| 2717 | }; |
| 2718 | |
| 2719 | static const lightrec_rec_func_t rec_cp0[64] = { |
| 2720 | SET_DEFAULT_ELM(rec_cp0, rec_CP), |
| 2721 | [OP_CP0_MFC0] = rec_cp0_MFC0, |
| 2722 | [OP_CP0_CFC0] = rec_cp0_CFC0, |
| 2723 | [OP_CP0_MTC0] = rec_cp0_MTC0, |
| 2724 | [OP_CP0_CTC0] = rec_cp0_CTC0, |
| 2725 | [OP_CP0_RFE] = rec_cp0_RFE, |
| 2726 | }; |
| 2727 | |
| 2728 | static const lightrec_rec_func_t rec_cp2_basic[64] = { |
| 2729 | SET_DEFAULT_ELM(rec_cp2_basic, rec_CP), |
| 2730 | [OP_CP2_BASIC_MFC2] = rec_cp2_basic_MFC2, |
| 2731 | [OP_CP2_BASIC_CFC2] = rec_cp2_basic_CFC2, |
| 2732 | [OP_CP2_BASIC_MTC2] = rec_cp2_basic_MTC2, |
| 2733 | [OP_CP2_BASIC_CTC2] = rec_cp2_basic_CTC2, |
| 2734 | }; |
| 2735 | |
| 2736 | static const lightrec_rec_func_t rec_meta[64] = { |
| 2737 | SET_DEFAULT_ELM(rec_meta, unknown_opcode), |
| 2738 | [OP_META_MOV] = rec_meta_MOV, |
| 2739 | [OP_META_EXTC] = rec_meta_EXTC_EXTS, |
| 2740 | [OP_META_EXTS] = rec_meta_EXTC_EXTS, |
| 2741 | [OP_META_COM] = rec_meta_COM, |
| 2742 | }; |
| 2743 | |
| 2744 | static void rec_SPECIAL(struct lightrec_cstate *state, |
| 2745 | const struct block *block, u16 offset) |
| 2746 | { |
| 2747 | union code c = block->opcode_list[offset].c; |
| 2748 | lightrec_rec_func_t f = rec_special[c.r.op]; |
| 2749 | |
| 2750 | if (!HAS_DEFAULT_ELM && unlikely(!f)) |
| 2751 | unknown_opcode(state, block, offset); |
| 2752 | else |
| 2753 | (*f)(state, block, offset); |
| 2754 | } |
| 2755 | |
| 2756 | static void rec_REGIMM(struct lightrec_cstate *state, |
| 2757 | const struct block *block, u16 offset) |
| 2758 | { |
| 2759 | union code c = block->opcode_list[offset].c; |
| 2760 | lightrec_rec_func_t f = rec_regimm[c.r.rt]; |
| 2761 | |
| 2762 | if (!HAS_DEFAULT_ELM && unlikely(!f)) |
| 2763 | unknown_opcode(state, block, offset); |
| 2764 | else |
| 2765 | (*f)(state, block, offset); |
| 2766 | } |
| 2767 | |
| 2768 | static void rec_CP0(struct lightrec_cstate *state, |
| 2769 | const struct block *block, u16 offset) |
| 2770 | { |
| 2771 | union code c = block->opcode_list[offset].c; |
| 2772 | lightrec_rec_func_t f = rec_cp0[c.r.rs]; |
| 2773 | |
| 2774 | if (!HAS_DEFAULT_ELM && unlikely(!f)) |
| 2775 | rec_CP(state, block, offset); |
| 2776 | else |
| 2777 | (*f)(state, block, offset); |
| 2778 | } |
| 2779 | |
| 2780 | static void rec_CP2(struct lightrec_cstate *state, |
| 2781 | const struct block *block, u16 offset) |
| 2782 | { |
| 2783 | union code c = block->opcode_list[offset].c; |
| 2784 | |
| 2785 | if (c.r.op == OP_CP2_BASIC) { |
| 2786 | lightrec_rec_func_t f = rec_cp2_basic[c.r.rs]; |
| 2787 | |
| 2788 | if (HAS_DEFAULT_ELM || likely(f)) { |
| 2789 | (*f)(state, block, offset); |
| 2790 | return; |
| 2791 | } |
| 2792 | } |
| 2793 | |
| 2794 | rec_CP(state, block, offset); |
| 2795 | } |
| 2796 | |
| 2797 | static void rec_META(struct lightrec_cstate *state, |
| 2798 | const struct block *block, u16 offset) |
| 2799 | { |
| 2800 | union code c = block->opcode_list[offset].c; |
| 2801 | lightrec_rec_func_t f = rec_meta[c.m.op]; |
| 2802 | |
| 2803 | if (!HAS_DEFAULT_ELM && unlikely(!f)) |
| 2804 | unknown_opcode(state, block, offset); |
| 2805 | else |
| 2806 | (*f)(state, block, offset); |
| 2807 | } |
| 2808 | |
| 2809 | void lightrec_rec_opcode(struct lightrec_cstate *state, |
| 2810 | const struct block *block, u16 offset) |
| 2811 | { |
| 2812 | struct regcache *reg_cache = state->reg_cache; |
| 2813 | struct lightrec_branch_target *target; |
| 2814 | const struct opcode *op = &block->opcode_list[offset]; |
| 2815 | jit_state_t *_jit = block->_jit; |
| 2816 | lightrec_rec_func_t f; |
| 2817 | u16 unload_offset; |
| 2818 | |
| 2819 | if (op_flag_sync(op->flags)) { |
| 2820 | if (state->cycles) |
| 2821 | jit_subi(LIGHTREC_REG_CYCLE, LIGHTREC_REG_CYCLE, state->cycles); |
| 2822 | state->cycles = 0; |
| 2823 | |
| 2824 | lightrec_storeback_regs(reg_cache, _jit); |
| 2825 | lightrec_regcache_reset(reg_cache); |
| 2826 | |
| 2827 | pr_debug("Adding branch target at offset 0x%x\n", offset << 2); |
| 2828 | target = &state->targets[state->nb_targets++]; |
| 2829 | target->offset = offset; |
| 2830 | target->label = jit_indirect(); |
| 2831 | } |
| 2832 | |
| 2833 | if (likely(op->opcode)) { |
| 2834 | f = rec_standard[op->i.op]; |
| 2835 | |
| 2836 | if (!HAS_DEFAULT_ELM && unlikely(!f)) |
| 2837 | unknown_opcode(state, block, offset); |
| 2838 | else |
| 2839 | (*f)(state, block, offset); |
| 2840 | } |
| 2841 | |
| 2842 | if (OPT_EARLY_UNLOAD) { |
| 2843 | unload_offset = offset + |
| 2844 | (has_delay_slot(op->c) && !op_flag_no_ds(op->flags)); |
| 2845 | |
| 2846 | lightrec_do_early_unload(state, block, unload_offset); |
| 2847 | } |
| 2848 | |
| 2849 | state->no_load_delay = false; |
| 2850 | } |