| 1 | /*************************************************************************** |
| 2 | * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team * |
| 3 | * * |
| 4 | * This program is free software; you can redistribute it and/or modify * |
| 5 | * it under the terms of the GNU General Public License as published by * |
| 6 | * the Free Software Foundation; either version 2 of the License, or * |
| 7 | * (at your option) any later version. * |
| 8 | * * |
| 9 | * This program is distributed in the hope that it will be useful, * |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 12 | * GNU General Public License for more details. * |
| 13 | * * |
| 14 | * You should have received a copy of the GNU General Public License * |
| 15 | * along with this program; if not, write to the * |
| 16 | * Free Software Foundation, Inc., * |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. * |
| 18 | ***************************************************************************/ |
| 19 | |
| 20 | /* |
| 21 | * PSX assembly interpreter. |
| 22 | */ |
| 23 | |
| 24 | #include "psxcommon.h" |
| 25 | #include "r3000a.h" |
| 26 | #include "gte.h" |
| 27 | #include "psxhle.h" |
| 28 | #include "debug.h" |
| 29 | #include "psxinterpreter.h" |
| 30 | #include <assert.h> |
| 31 | |
| 32 | static int branch = 0; |
| 33 | static int branch2 = 0; |
| 34 | static u32 branchPC; |
| 35 | |
| 36 | // These macros are used to assemble the repassembler functions |
| 37 | |
| 38 | #ifdef PSXCPU_LOG |
| 39 | #define debugI() PSXCPU_LOG("%s\n", disR3000AF(psxRegs.code, psxRegs.pc)); |
| 40 | #else |
| 41 | #define debugI() |
| 42 | #endif |
| 43 | |
| 44 | #ifndef NDEBUG |
| 45 | #include "debug.h" |
| 46 | #else |
| 47 | void StartDebugger() {} |
| 48 | void ProcessDebug() {} |
| 49 | void StopDebugger() {} |
| 50 | #endif |
| 51 | |
| 52 | // Subsets |
| 53 | void (*psxBSC[64])(); |
| 54 | void (*psxSPC[64])(); |
| 55 | void (*psxREG[32])(); |
| 56 | void (*psxCP0[32])(); |
| 57 | void (*psxCP2[64])(struct psxCP2Regs *regs); |
| 58 | void (*psxCP2BSC[32])(); |
| 59 | |
| 60 | static u32 fetchNoCache(u32 pc) |
| 61 | { |
| 62 | u32 *code = (u32 *)PSXM(pc); |
| 63 | return ((code == NULL) ? 0 : SWAP32(*code)); |
| 64 | } |
| 65 | |
| 66 | /* |
| 67 | Formula One 2001 : |
| 68 | Use old CPU cache code when the RAM location is updated with new code (affects in-game racing) |
| 69 | */ |
| 70 | static struct cache_entry { |
| 71 | u32 tag; |
| 72 | u32 data[4]; |
| 73 | } ICache[256]; |
| 74 | |
| 75 | static u32 fetchICache(u32 pc) |
| 76 | { |
| 77 | // cached? |
| 78 | if (pc < 0xa0000000) |
| 79 | { |
| 80 | // this is not how the hardware works but whatever |
| 81 | struct cache_entry *entry = &ICache[(pc & 0xff0) >> 4]; |
| 82 | |
| 83 | if (((entry->tag ^ pc) & 0xfffffff0) != 0 || pc < entry->tag) |
| 84 | { |
| 85 | u32 *code = (u32 *)PSXM(pc & ~0x0f); |
| 86 | if (!code) |
| 87 | return 0; |
| 88 | |
| 89 | entry->tag = pc; |
| 90 | // treat as 4 words, although other configurations are said to be possible |
| 91 | switch (pc & 0x0c) |
| 92 | { |
| 93 | case 0x00: entry->data[0] = SWAP32(code[0]); |
| 94 | case 0x04: entry->data[1] = SWAP32(code[1]); |
| 95 | case 0x08: entry->data[2] = SWAP32(code[2]); |
| 96 | case 0x0c: entry->data[3] = SWAP32(code[3]); |
| 97 | } |
| 98 | } |
| 99 | return entry->data[(pc & 0x0f) >> 2]; |
| 100 | } |
| 101 | |
| 102 | return fetchNoCache(pc); |
| 103 | } |
| 104 | |
| 105 | u32 (*fetch)(u32 pc) = fetchNoCache; |
| 106 | |
| 107 | static void delayRead(int reg, u32 bpc) { |
| 108 | u32 rold, rnew; |
| 109 | |
| 110 | // SysPrintf("delayRead at %x!\n", psxRegs.pc); |
| 111 | |
| 112 | rold = psxRegs.GPR.r[reg]; |
| 113 | psxBSC[psxRegs.code >> 26](); // branch delay load |
| 114 | rnew = psxRegs.GPR.r[reg]; |
| 115 | |
| 116 | psxRegs.pc = bpc; |
| 117 | |
| 118 | branch = 0; |
| 119 | |
| 120 | psxRegs.GPR.r[reg] = rold; |
| 121 | execI(); // first branch opcode |
| 122 | psxRegs.GPR.r[reg] = rnew; |
| 123 | |
| 124 | psxBranchTest(); |
| 125 | } |
| 126 | |
| 127 | static void delayWrite(int reg, u32 bpc) { |
| 128 | |
| 129 | /* SysPrintf("delayWrite at %x!\n", psxRegs.pc); |
| 130 | |
| 131 | SysPrintf("%s\n", disR3000AF(psxRegs.code, psxRegs.pc-4)); |
| 132 | SysPrintf("%s\n", disR3000AF(PSXMu32(bpc), bpc));*/ |
| 133 | |
| 134 | // no changes from normal behavior |
| 135 | |
| 136 | psxBSC[psxRegs.code >> 26](); |
| 137 | |
| 138 | branch = 0; |
| 139 | psxRegs.pc = bpc; |
| 140 | |
| 141 | psxBranchTest(); |
| 142 | } |
| 143 | |
| 144 | static void delayReadWrite(int reg, u32 bpc) { |
| 145 | |
| 146 | // SysPrintf("delayReadWrite at %x!\n", psxRegs.pc); |
| 147 | |
| 148 | // the branch delay load is skipped |
| 149 | |
| 150 | branch = 0; |
| 151 | psxRegs.pc = bpc; |
| 152 | |
| 153 | psxBranchTest(); |
| 154 | } |
| 155 | |
| 156 | // this defines shall be used with the tmp |
| 157 | // of the next func (instead of _Funct_...) |
| 158 | #define _tFunct_ ((tmp ) & 0x3F) // The funct part of the instruction register |
| 159 | #define _tRd_ ((tmp >> 11) & 0x1F) // The rd part of the instruction register |
| 160 | #define _tRt_ ((tmp >> 16) & 0x1F) // The rt part of the instruction register |
| 161 | #define _tRs_ ((tmp >> 21) & 0x1F) // The rs part of the instruction register |
| 162 | #define _tSa_ ((tmp >> 6) & 0x1F) // The sa part of the instruction register |
| 163 | |
| 164 | int psxTestLoadDelay(int reg, u32 tmp) { |
| 165 | if (tmp == 0) return 0; // NOP |
| 166 | switch (tmp >> 26) { |
| 167 | case 0x00: // SPECIAL |
| 168 | switch (_tFunct_) { |
| 169 | case 0x00: // SLL |
| 170 | case 0x02: case 0x03: // SRL/SRA |
| 171 | if (_tRd_ == reg && _tRt_ == reg) return 1; else |
| 172 | if (_tRt_ == reg) return 2; else |
| 173 | if (_tRd_ == reg) return 3; |
| 174 | break; |
| 175 | |
| 176 | case 0x08: // JR |
| 177 | if (_tRs_ == reg) return 2; |
| 178 | break; |
| 179 | case 0x09: // JALR |
| 180 | if (_tRd_ == reg && _tRs_ == reg) return 1; else |
| 181 | if (_tRs_ == reg) return 2; else |
| 182 | if (_tRd_ == reg) return 3; |
| 183 | break; |
| 184 | |
| 185 | // SYSCALL/BREAK just a break; |
| 186 | |
| 187 | case 0x20: case 0x21: case 0x22: case 0x23: |
| 188 | case 0x24: case 0x25: case 0x26: case 0x27: |
| 189 | case 0x2a: case 0x2b: // ADD/ADDU... |
| 190 | case 0x04: case 0x06: case 0x07: // SLLV... |
| 191 | if (_tRd_ == reg && (_tRt_ == reg || _tRs_ == reg)) return 1; else |
| 192 | if (_tRt_ == reg || _tRs_ == reg) return 2; else |
| 193 | if (_tRd_ == reg) return 3; |
| 194 | break; |
| 195 | |
| 196 | case 0x10: case 0x12: // MFHI/MFLO |
| 197 | if (_tRd_ == reg) return 3; |
| 198 | break; |
| 199 | case 0x11: case 0x13: // MTHI/MTLO |
| 200 | if (_tRs_ == reg) return 2; |
| 201 | break; |
| 202 | |
| 203 | case 0x18: case 0x19: |
| 204 | case 0x1a: case 0x1b: // MULT/DIV... |
| 205 | if (_tRt_ == reg || _tRs_ == reg) return 2; |
| 206 | break; |
| 207 | } |
| 208 | break; |
| 209 | |
| 210 | case 0x01: // REGIMM |
| 211 | switch (_tRt_) { |
| 212 | case 0x00: case 0x01: |
| 213 | case 0x10: case 0x11: // BLTZ/BGEZ... |
| 214 | // Xenogears - lbu v0 / beq v0 |
| 215 | // - no load delay (fixes battle loading) |
| 216 | break; |
| 217 | |
| 218 | if (_tRs_ == reg) return 2; |
| 219 | break; |
| 220 | } |
| 221 | break; |
| 222 | |
| 223 | // J would be just a break; |
| 224 | case 0x03: // JAL |
| 225 | if (31 == reg) return 3; |
| 226 | break; |
| 227 | |
| 228 | case 0x04: case 0x05: // BEQ/BNE |
| 229 | // Xenogears - lbu v0 / beq v0 |
| 230 | // - no load delay (fixes battle loading) |
| 231 | break; |
| 232 | |
| 233 | if (_tRs_ == reg || _tRt_ == reg) return 2; |
| 234 | break; |
| 235 | |
| 236 | case 0x06: case 0x07: // BLEZ/BGTZ |
| 237 | // Xenogears - lbu v0 / beq v0 |
| 238 | // - no load delay (fixes battle loading) |
| 239 | break; |
| 240 | |
| 241 | if (_tRs_ == reg) return 2; |
| 242 | break; |
| 243 | |
| 244 | case 0x08: case 0x09: case 0x0a: case 0x0b: |
| 245 | case 0x0c: case 0x0d: case 0x0e: // ADDI/ADDIU... |
| 246 | if (_tRt_ == reg && _tRs_ == reg) return 1; else |
| 247 | if (_tRs_ == reg) return 2; else |
| 248 | if (_tRt_ == reg) return 3; |
| 249 | break; |
| 250 | |
| 251 | case 0x0f: // LUI |
| 252 | if (_tRt_ == reg) return 3; |
| 253 | break; |
| 254 | |
| 255 | case 0x10: // COP0 |
| 256 | switch (_tFunct_) { |
| 257 | case 0x00: // MFC0 |
| 258 | if (_tRt_ == reg) return 3; |
| 259 | break; |
| 260 | case 0x02: // CFC0 |
| 261 | if (_tRt_ == reg) return 3; |
| 262 | break; |
| 263 | case 0x04: // MTC0 |
| 264 | if (_tRt_ == reg) return 2; |
| 265 | break; |
| 266 | case 0x06: // CTC0 |
| 267 | if (_tRt_ == reg) return 2; |
| 268 | break; |
| 269 | // RFE just a break; |
| 270 | } |
| 271 | break; |
| 272 | |
| 273 | case 0x12: // COP2 |
| 274 | switch (_tFunct_) { |
| 275 | case 0x00: |
| 276 | switch (_tRs_) { |
| 277 | case 0x00: // MFC2 |
| 278 | if (_tRt_ == reg) return 3; |
| 279 | break; |
| 280 | case 0x02: // CFC2 |
| 281 | if (_tRt_ == reg) return 3; |
| 282 | break; |
| 283 | case 0x04: // MTC2 |
| 284 | if (_tRt_ == reg) return 2; |
| 285 | break; |
| 286 | case 0x06: // CTC2 |
| 287 | if (_tRt_ == reg) return 2; |
| 288 | break; |
| 289 | } |
| 290 | break; |
| 291 | // RTPS... break; |
| 292 | } |
| 293 | break; |
| 294 | |
| 295 | case 0x22: case 0x26: // LWL/LWR |
| 296 | if (_tRt_ == reg) return 3; else |
| 297 | if (_tRs_ == reg) return 2; |
| 298 | break; |
| 299 | |
| 300 | case 0x20: case 0x21: case 0x23: |
| 301 | case 0x24: case 0x25: // LB/LH/LW/LBU/LHU |
| 302 | if (_tRt_ == reg && _tRs_ == reg) return 1; else |
| 303 | if (_tRs_ == reg) return 2; else |
| 304 | if (_tRt_ == reg) return 3; |
| 305 | break; |
| 306 | |
| 307 | case 0x28: case 0x29: case 0x2a: |
| 308 | case 0x2b: case 0x2e: // SB/SH/SWL/SW/SWR |
| 309 | if (_tRt_ == reg || _tRs_ == reg) return 2; |
| 310 | break; |
| 311 | |
| 312 | case 0x32: case 0x3a: // LWC2/SWC2 |
| 313 | if (_tRs_ == reg) return 2; |
| 314 | break; |
| 315 | } |
| 316 | |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | void psxDelayTest(int reg, u32 bpc) { |
| 321 | u32 tmp = fetch(bpc); |
| 322 | branch = 1; |
| 323 | |
| 324 | switch (psxTestLoadDelay(reg, tmp)) { |
| 325 | case 1: |
| 326 | delayReadWrite(reg, bpc); return; |
| 327 | case 2: |
| 328 | delayRead(reg, bpc); return; |
| 329 | case 3: |
| 330 | delayWrite(reg, bpc); return; |
| 331 | } |
| 332 | psxBSC[psxRegs.code >> 26](); |
| 333 | |
| 334 | branch = 0; |
| 335 | psxRegs.pc = bpc; |
| 336 | |
| 337 | psxBranchTest(); |
| 338 | } |
| 339 | |
| 340 | static u32 psxBranchNoDelay(void) { |
| 341 | u32 temp; |
| 342 | |
| 343 | psxRegs.code = fetch(psxRegs.pc); |
| 344 | switch (_Op_) { |
| 345 | case 0x00: // SPECIAL |
| 346 | switch (_Funct_) { |
| 347 | case 0x08: // JR |
| 348 | return _u32(_rRs_); |
| 349 | case 0x09: // JALR |
| 350 | temp = _u32(_rRs_); |
| 351 | if (_Rd_) { _SetLink(_Rd_); } |
| 352 | return temp; |
| 353 | } |
| 354 | break; |
| 355 | case 0x01: // REGIMM |
| 356 | switch (_Rt_) { |
| 357 | case 0x00: // BLTZ |
| 358 | if (_i32(_rRs_) < 0) |
| 359 | return _BranchTarget_; |
| 360 | break; |
| 361 | case 0x01: // BGEZ |
| 362 | if (_i32(_rRs_) >= 0) |
| 363 | return _BranchTarget_; |
| 364 | break; |
| 365 | case 0x08: // BLTZAL |
| 366 | if (_i32(_rRs_) < 0) { |
| 367 | _SetLink(31); |
| 368 | return _BranchTarget_; |
| 369 | } |
| 370 | break; |
| 371 | case 0x09: // BGEZAL |
| 372 | if (_i32(_rRs_) >= 0) { |
| 373 | _SetLink(31); |
| 374 | return _BranchTarget_; |
| 375 | } |
| 376 | break; |
| 377 | } |
| 378 | break; |
| 379 | case 0x02: // J |
| 380 | return _JumpTarget_; |
| 381 | case 0x03: // JAL |
| 382 | _SetLink(31); |
| 383 | return _JumpTarget_; |
| 384 | case 0x04: // BEQ |
| 385 | if (_i32(_rRs_) == _i32(_rRt_)) |
| 386 | return _BranchTarget_; |
| 387 | break; |
| 388 | case 0x05: // BNE |
| 389 | if (_i32(_rRs_) != _i32(_rRt_)) |
| 390 | return _BranchTarget_; |
| 391 | break; |
| 392 | case 0x06: // BLEZ |
| 393 | if (_i32(_rRs_) <= 0) |
| 394 | return _BranchTarget_; |
| 395 | break; |
| 396 | case 0x07: // BGTZ |
| 397 | if (_i32(_rRs_) > 0) |
| 398 | return _BranchTarget_; |
| 399 | break; |
| 400 | } |
| 401 | |
| 402 | return (u32)-1; |
| 403 | } |
| 404 | |
| 405 | static int psxDelayBranchExec(u32 tar) { |
| 406 | execI(); |
| 407 | |
| 408 | branch = 0; |
| 409 | psxRegs.pc = tar; |
| 410 | psxRegs.cycle += BIAS; |
| 411 | psxBranchTest(); |
| 412 | return 1; |
| 413 | } |
| 414 | |
| 415 | static int psxDelayBranchTest(u32 tar1) { |
| 416 | u32 tar2, tmp1, tmp2; |
| 417 | |
| 418 | tar2 = psxBranchNoDelay(); |
| 419 | if (tar2 == (u32)-1) |
| 420 | return 0; |
| 421 | |
| 422 | debugI(); |
| 423 | |
| 424 | /* |
| 425 | * Branch in delay slot: |
| 426 | * - execute 1 instruction at tar1 |
| 427 | * - jump to tar2 (target of branch in delay slot; this branch |
| 428 | * has no normal delay slot, instruction at tar1 was fetched instead) |
| 429 | */ |
| 430 | psxRegs.pc = tar1; |
| 431 | tmp1 = psxBranchNoDelay(); |
| 432 | if (tmp1 == (u32)-1) { |
| 433 | return psxDelayBranchExec(tar2); |
| 434 | } |
| 435 | debugI(); |
| 436 | psxRegs.cycle += BIAS; |
| 437 | |
| 438 | /* |
| 439 | * Got a branch at tar1: |
| 440 | * - execute 1 instruction at tar2 |
| 441 | * - jump to target of that branch (tmp1) |
| 442 | */ |
| 443 | psxRegs.pc = tar2; |
| 444 | tmp2 = psxBranchNoDelay(); |
| 445 | if (tmp2 == (u32)-1) { |
| 446 | return psxDelayBranchExec(tmp1); |
| 447 | } |
| 448 | debugI(); |
| 449 | psxRegs.cycle += BIAS; |
| 450 | |
| 451 | /* |
| 452 | * Got a branch at tar2: |
| 453 | * - execute 1 instruction at tmp1 |
| 454 | * - jump to target of that branch (tmp2) |
| 455 | */ |
| 456 | psxRegs.pc = tmp1; |
| 457 | return psxDelayBranchExec(tmp2); |
| 458 | } |
| 459 | |
| 460 | static void doBranch(u32 tar) { |
| 461 | u32 tmp; |
| 462 | |
| 463 | branch2 = branch = 1; |
| 464 | branchPC = tar; |
| 465 | |
| 466 | // check for branch in delay slot |
| 467 | if (psxDelayBranchTest(tar)) |
| 468 | return; |
| 469 | |
| 470 | psxRegs.code = fetch(psxRegs.pc); |
| 471 | |
| 472 | debugI(); |
| 473 | |
| 474 | psxRegs.pc += 4; |
| 475 | psxRegs.cycle += BIAS; |
| 476 | |
| 477 | // check for load delay |
| 478 | tmp = psxRegs.code >> 26; |
| 479 | switch (tmp) { |
| 480 | case 0x10: // COP0 |
| 481 | switch (_Rs_) { |
| 482 | case 0x00: // MFC0 |
| 483 | case 0x02: // CFC0 |
| 484 | psxDelayTest(_Rt_, branchPC); |
| 485 | return; |
| 486 | } |
| 487 | break; |
| 488 | case 0x12: // COP2 |
| 489 | switch (_Funct_) { |
| 490 | case 0x00: |
| 491 | switch (_Rs_) { |
| 492 | case 0x00: // MFC2 |
| 493 | case 0x02: // CFC2 |
| 494 | psxDelayTest(_Rt_, branchPC); |
| 495 | return; |
| 496 | } |
| 497 | break; |
| 498 | } |
| 499 | break; |
| 500 | case 0x32: // LWC2 |
| 501 | psxDelayTest(_Rt_, branchPC); |
| 502 | return; |
| 503 | default: |
| 504 | if (tmp >= 0x20 && tmp <= 0x26) { // LB/LH/LWL/LW/LBU/LHU/LWR |
| 505 | psxDelayTest(_Rt_, branchPC); |
| 506 | return; |
| 507 | } |
| 508 | break; |
| 509 | } |
| 510 | |
| 511 | psxBSC[psxRegs.code >> 26](); |
| 512 | |
| 513 | branch = 0; |
| 514 | psxRegs.pc = branchPC; |
| 515 | |
| 516 | psxBranchTest(); |
| 517 | } |
| 518 | |
| 519 | /********************************************************* |
| 520 | * Arithmetic with immediate operand * |
| 521 | * Format: OP rt, rs, immediate * |
| 522 | *********************************************************/ |
| 523 | void psxADDI() { if (!_Rt_) return; _rRt_ = _u32(_rRs_) + _Imm_ ; } // Rt = Rs + Im (Exception on Integer Overflow) |
| 524 | void psxADDIU() { if (!_Rt_) return; _rRt_ = _u32(_rRs_) + _Imm_ ; } // Rt = Rs + Im |
| 525 | void psxANDI() { if (!_Rt_) return; _rRt_ = _u32(_rRs_) & _ImmU_; } // Rt = Rs And Im |
| 526 | void psxORI() { if (!_Rt_) return; _rRt_ = _u32(_rRs_) | _ImmU_; } // Rt = Rs Or Im |
| 527 | void psxXORI() { if (!_Rt_) return; _rRt_ = _u32(_rRs_) ^ _ImmU_; } // Rt = Rs Xor Im |
| 528 | void psxSLTI() { if (!_Rt_) return; _rRt_ = _i32(_rRs_) < _Imm_ ; } // Rt = Rs < Im (Signed) |
| 529 | void psxSLTIU() { if (!_Rt_) return; _rRt_ = _u32(_rRs_) < ((u32)_Imm_); } // Rt = Rs < Im (Unsigned) |
| 530 | |
| 531 | /********************************************************* |
| 532 | * Register arithmetic * |
| 533 | * Format: OP rd, rs, rt * |
| 534 | *********************************************************/ |
| 535 | void psxADD() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) + _u32(_rRt_); } // Rd = Rs + Rt (Exception on Integer Overflow) |
| 536 | void psxADDU() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) + _u32(_rRt_); } // Rd = Rs + Rt |
| 537 | void psxSUB() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) - _u32(_rRt_); } // Rd = Rs - Rt (Exception on Integer Overflow) |
| 538 | void psxSUBU() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) - _u32(_rRt_); } // Rd = Rs - Rt |
| 539 | void psxAND() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) & _u32(_rRt_); } // Rd = Rs And Rt |
| 540 | void psxOR() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) | _u32(_rRt_); } // Rd = Rs Or Rt |
| 541 | void psxXOR() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) ^ _u32(_rRt_); } // Rd = Rs Xor Rt |
| 542 | void psxNOR() { if (!_Rd_) return; _rRd_ =~(_u32(_rRs_) | _u32(_rRt_)); }// Rd = Rs Nor Rt |
| 543 | void psxSLT() { if (!_Rd_) return; _rRd_ = _i32(_rRs_) < _i32(_rRt_); } // Rd = Rs < Rt (Signed) |
| 544 | void psxSLTU() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) < _u32(_rRt_); } // Rd = Rs < Rt (Unsigned) |
| 545 | |
| 546 | /********************************************************* |
| 547 | * Register mult/div & Register trap logic * |
| 548 | * Format: OP rs, rt * |
| 549 | *********************************************************/ |
| 550 | void psxDIV() { |
| 551 | if (!_i32(_rRt_)) { |
| 552 | _i32(_rHi_) = _i32(_rRs_); |
| 553 | if (_i32(_rRs_) & 0x80000000) { |
| 554 | _i32(_rLo_) = 1; |
| 555 | } else { |
| 556 | _i32(_rLo_) = 0xFFFFFFFF; |
| 557 | } |
| 558 | /* |
| 559 | * Notaz said that this was "not needed" for ARM platforms and could slow it down so let's disable for ARM. |
| 560 | * This fixes a crash issue that can happen when running Amidog's CPU test. |
| 561 | * (It still stays stuck to a black screen but at least it doesn't crash anymore) |
| 562 | */ |
| 563 | #if !defined(__arm__) && !defined(__aarch64__) |
| 564 | } else if (_i32(_rRs_) == 0x80000000 && _i32(_rRt_) == 0xFFFFFFFF) { |
| 565 | _i32(_rLo_) = 0x80000000; |
| 566 | _i32(_rHi_) = 0; |
| 567 | #endif |
| 568 | } else { |
| 569 | _i32(_rLo_) = _i32(_rRs_) / _i32(_rRt_); |
| 570 | _i32(_rHi_) = _i32(_rRs_) % _i32(_rRt_); |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | void psxDIV_stall() { |
| 575 | psxRegs.muldivBusyCycle = psxRegs.cycle + 37; |
| 576 | psxDIV(); |
| 577 | } |
| 578 | |
| 579 | void psxDIVU() { |
| 580 | if (_rRt_ != 0) { |
| 581 | _rLo_ = _rRs_ / _rRt_; |
| 582 | _rHi_ = _rRs_ % _rRt_; |
| 583 | } |
| 584 | else { |
| 585 | _i32(_rLo_) = 0xffffffff; |
| 586 | _i32(_rHi_) = _i32(_rRs_); |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | void psxDIVU_stall() { |
| 591 | psxRegs.muldivBusyCycle = psxRegs.cycle + 37; |
| 592 | psxDIVU(); |
| 593 | } |
| 594 | |
| 595 | void psxMULT() { |
| 596 | u64 res = (s64)((s64)_i32(_rRs_) * (s64)_i32(_rRt_)); |
| 597 | |
| 598 | psxRegs.GPR.n.lo = (u32)(res & 0xffffffff); |
| 599 | psxRegs.GPR.n.hi = (u32)((res >> 32) & 0xffffffff); |
| 600 | } |
| 601 | |
| 602 | void psxMULT_stall() { |
| 603 | // approximate, but maybe good enough |
| 604 | u32 rs = _rRs_; |
| 605 | u32 lz = __builtin_clz(((rs ^ ((s32)rs >> 21)) | 1)); |
| 606 | u32 c = 7 + (2 - (lz / 11)) * 4; |
| 607 | psxRegs.muldivBusyCycle = psxRegs.cycle + c; |
| 608 | psxMULT(); |
| 609 | } |
| 610 | |
| 611 | void psxMULTU() { |
| 612 | u64 res = (u64)((u64)_u32(_rRs_) * (u64)_u32(_rRt_)); |
| 613 | |
| 614 | psxRegs.GPR.n.lo = (u32)(res & 0xffffffff); |
| 615 | psxRegs.GPR.n.hi = (u32)((res >> 32) & 0xffffffff); |
| 616 | } |
| 617 | |
| 618 | void psxMULTU_stall() { |
| 619 | // approximate, but maybe good enough |
| 620 | u32 lz = __builtin_clz(_rRs_ | 1); |
| 621 | u32 c = 7 + (2 - (lz / 11)) * 4; |
| 622 | psxRegs.muldivBusyCycle = psxRegs.cycle + c; |
| 623 | psxMULTU(); |
| 624 | } |
| 625 | |
| 626 | /********************************************************* |
| 627 | * Register branch logic * |
| 628 | * Format: OP rs, offset * |
| 629 | *********************************************************/ |
| 630 | #define RepZBranchi32(op) if(_i32(_rRs_) op 0) doBranch(_BranchTarget_); |
| 631 | #define RepZBranchLinki32(op) { _SetLink(31); if(_i32(_rRs_) op 0) { doBranch(_BranchTarget_); } } |
| 632 | |
| 633 | void psxBGEZ() { RepZBranchi32(>=) } // Branch if Rs >= 0 |
| 634 | void psxBGEZAL() { RepZBranchLinki32(>=) } // Branch if Rs >= 0 and link |
| 635 | void psxBGTZ() { RepZBranchi32(>) } // Branch if Rs > 0 |
| 636 | void psxBLEZ() { RepZBranchi32(<=) } // Branch if Rs <= 0 |
| 637 | void psxBLTZ() { RepZBranchi32(<) } // Branch if Rs < 0 |
| 638 | void psxBLTZAL() { RepZBranchLinki32(<) } // Branch if Rs < 0 and link |
| 639 | |
| 640 | /********************************************************* |
| 641 | * Shift arithmetic with constant shift * |
| 642 | * Format: OP rd, rt, sa * |
| 643 | *********************************************************/ |
| 644 | void psxSLL() { if (!_Rd_) return; _u32(_rRd_) = _u32(_rRt_) << _Sa_; } // Rd = Rt << sa |
| 645 | void psxSRA() { if (!_Rd_) return; _i32(_rRd_) = _i32(_rRt_) >> _Sa_; } // Rd = Rt >> sa (arithmetic) |
| 646 | void psxSRL() { if (!_Rd_) return; _u32(_rRd_) = _u32(_rRt_) >> _Sa_; } // Rd = Rt >> sa (logical) |
| 647 | |
| 648 | /********************************************************* |
| 649 | * Shift arithmetic with variant register shift * |
| 650 | * Format: OP rd, rt, rs * |
| 651 | *********************************************************/ |
| 652 | void psxSLLV() { if (!_Rd_) return; _u32(_rRd_) = _u32(_rRt_) << (_u32(_rRs_) & 0x1F); } // Rd = Rt << rs |
| 653 | void psxSRAV() { if (!_Rd_) return; _i32(_rRd_) = _i32(_rRt_) >> (_u32(_rRs_) & 0x1F); } // Rd = Rt >> rs (arithmetic) |
| 654 | void psxSRLV() { if (!_Rd_) return; _u32(_rRd_) = _u32(_rRt_) >> (_u32(_rRs_) & 0x1F); } // Rd = Rt >> rs (logical) |
| 655 | |
| 656 | /********************************************************* |
| 657 | * Load higher 16 bits of the first word in GPR with imm * |
| 658 | * Format: OP rt, immediate * |
| 659 | *********************************************************/ |
| 660 | void psxLUI() { if (!_Rt_) return; _u32(_rRt_) = psxRegs.code << 16; } // Upper halfword of Rt = Im |
| 661 | |
| 662 | /********************************************************* |
| 663 | * Move from HI/LO to GPR * |
| 664 | * Format: OP rd * |
| 665 | *********************************************************/ |
| 666 | void psxMFHI() { if (!_Rd_) return; _rRd_ = _rHi_; } // Rd = Hi |
| 667 | void psxMFLO() { if (!_Rd_) return; _rRd_ = _rLo_; } // Rd = Lo |
| 668 | |
| 669 | static void mflohiCheckStall(void) |
| 670 | { |
| 671 | u32 left = psxRegs.muldivBusyCycle - psxRegs.cycle; |
| 672 | if (left <= 37) { |
| 673 | //printf("muldiv stall %u\n", left); |
| 674 | psxRegs.cycle = psxRegs.muldivBusyCycle; |
| 675 | } |
| 676 | } |
| 677 | |
| 678 | void psxMFHI_stall() { mflohiCheckStall(); psxMFHI(); } |
| 679 | void psxMFLO_stall() { mflohiCheckStall(); psxMFLO(); } |
| 680 | |
| 681 | /********************************************************* |
| 682 | * Move to GPR to HI/LO & Register jump * |
| 683 | * Format: OP rs * |
| 684 | *********************************************************/ |
| 685 | void psxMTHI() { _rHi_ = _rRs_; } // Hi = Rs |
| 686 | void psxMTLO() { _rLo_ = _rRs_; } // Lo = Rs |
| 687 | |
| 688 | /********************************************************* |
| 689 | * Special purpose instructions * |
| 690 | * Format: OP * |
| 691 | *********************************************************/ |
| 692 | void psxBREAK() { |
| 693 | psxRegs.pc -= 4; |
| 694 | psxException(0x24, branch); |
| 695 | } |
| 696 | |
| 697 | void psxSYSCALL() { |
| 698 | psxRegs.pc -= 4; |
| 699 | psxException(0x20, branch); |
| 700 | } |
| 701 | |
| 702 | void psxRFE() { |
| 703 | // SysPrintf("psxRFE\n"); |
| 704 | psxRegs.CP0.n.Status = (psxRegs.CP0.n.Status & 0xfffffff0) | |
| 705 | ((psxRegs.CP0.n.Status & 0x3c) >> 2); |
| 706 | psxTestSWInts(); |
| 707 | } |
| 708 | |
| 709 | /********************************************************* |
| 710 | * Register branch logic * |
| 711 | * Format: OP rs, rt, offset * |
| 712 | *********************************************************/ |
| 713 | #define RepBranchi32(op) if(_i32(_rRs_) op _i32(_rRt_)) doBranch(_BranchTarget_); |
| 714 | |
| 715 | void psxBEQ() { RepBranchi32(==) } // Branch if Rs == Rt |
| 716 | void psxBNE() { RepBranchi32(!=) } // Branch if Rs != Rt |
| 717 | |
| 718 | /********************************************************* |
| 719 | * Jump to target * |
| 720 | * Format: OP target * |
| 721 | *********************************************************/ |
| 722 | void psxJ() { doBranch(_JumpTarget_); } |
| 723 | void psxJAL() { _SetLink(31); doBranch(_JumpTarget_); } |
| 724 | |
| 725 | /********************************************************* |
| 726 | * Register jump * |
| 727 | * Format: OP rs, rd * |
| 728 | *********************************************************/ |
| 729 | void psxJR() { |
| 730 | doBranch(_rRs_ & ~3); |
| 731 | psxJumpTest(); |
| 732 | } |
| 733 | |
| 734 | void psxJALR() { |
| 735 | u32 temp = _u32(_rRs_); |
| 736 | if (_Rd_) { _SetLink(_Rd_); } |
| 737 | doBranch(temp & ~3); |
| 738 | } |
| 739 | |
| 740 | /********************************************************* |
| 741 | * Load and store for GPR * |
| 742 | * Format: OP rt, offset(base) * |
| 743 | *********************************************************/ |
| 744 | |
| 745 | #define _oB_ (_u32(_rRs_) + _Imm_) |
| 746 | |
| 747 | void psxLB() { |
| 748 | if (_Rt_) { |
| 749 | _i32(_rRt_) = (signed char)psxMemRead8(_oB_); |
| 750 | } else { |
| 751 | psxMemRead8(_oB_); |
| 752 | } |
| 753 | } |
| 754 | |
| 755 | void psxLBU() { |
| 756 | if (_Rt_) { |
| 757 | _u32(_rRt_) = psxMemRead8(_oB_); |
| 758 | } else { |
| 759 | psxMemRead8(_oB_); |
| 760 | } |
| 761 | } |
| 762 | |
| 763 | void psxLH() { |
| 764 | if (_Rt_) { |
| 765 | _i32(_rRt_) = (short)psxMemRead16(_oB_); |
| 766 | } else { |
| 767 | psxMemRead16(_oB_); |
| 768 | } |
| 769 | } |
| 770 | |
| 771 | void psxLHU() { |
| 772 | if (_Rt_) { |
| 773 | _u32(_rRt_) = psxMemRead16(_oB_); |
| 774 | } else { |
| 775 | psxMemRead16(_oB_); |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | void psxLW() { |
| 780 | if (_Rt_) { |
| 781 | _u32(_rRt_) = psxMemRead32(_oB_); |
| 782 | } else { |
| 783 | psxMemRead32(_oB_); |
| 784 | } |
| 785 | } |
| 786 | |
| 787 | u32 LWL_MASK[4] = { 0xffffff, 0xffff, 0xff, 0 }; |
| 788 | u32 LWL_SHIFT[4] = { 24, 16, 8, 0 }; |
| 789 | |
| 790 | void psxLWL() { |
| 791 | u32 addr = _oB_; |
| 792 | u32 shift = addr & 3; |
| 793 | u32 mem = psxMemRead32(addr & ~3); |
| 794 | |
| 795 | if (!_Rt_) return; |
| 796 | _u32(_rRt_) = ( _u32(_rRt_) & LWL_MASK[shift]) | |
| 797 | ( mem << LWL_SHIFT[shift]); |
| 798 | |
| 799 | /* |
| 800 | Mem = 1234. Reg = abcd |
| 801 | |
| 802 | 0 4bcd (mem << 24) | (reg & 0x00ffffff) |
| 803 | 1 34cd (mem << 16) | (reg & 0x0000ffff) |
| 804 | 2 234d (mem << 8) | (reg & 0x000000ff) |
| 805 | 3 1234 (mem ) | (reg & 0x00000000) |
| 806 | */ |
| 807 | } |
| 808 | |
| 809 | u32 LWR_MASK[4] = { 0, 0xff000000, 0xffff0000, 0xffffff00 }; |
| 810 | u32 LWR_SHIFT[4] = { 0, 8, 16, 24 }; |
| 811 | |
| 812 | void psxLWR() { |
| 813 | u32 addr = _oB_; |
| 814 | u32 shift = addr & 3; |
| 815 | u32 mem = psxMemRead32(addr & ~3); |
| 816 | |
| 817 | if (!_Rt_) return; |
| 818 | _u32(_rRt_) = ( _u32(_rRt_) & LWR_MASK[shift]) | |
| 819 | ( mem >> LWR_SHIFT[shift]); |
| 820 | |
| 821 | /* |
| 822 | Mem = 1234. Reg = abcd |
| 823 | |
| 824 | 0 1234 (mem ) | (reg & 0x00000000) |
| 825 | 1 a123 (mem >> 8) | (reg & 0xff000000) |
| 826 | 2 ab12 (mem >> 16) | (reg & 0xffff0000) |
| 827 | 3 abc1 (mem >> 24) | (reg & 0xffffff00) |
| 828 | */ |
| 829 | } |
| 830 | |
| 831 | void psxSB() { psxMemWrite8 (_oB_, _rRt_ & 0xff); } |
| 832 | void psxSH() { psxMemWrite16(_oB_, _rRt_ & 0xffff); } |
| 833 | void psxSW() { psxMemWrite32(_oB_, _rRt_); } |
| 834 | |
| 835 | u32 SWL_MASK[4] = { 0xffffff00, 0xffff0000, 0xff000000, 0 }; |
| 836 | u32 SWL_SHIFT[4] = { 24, 16, 8, 0 }; |
| 837 | |
| 838 | void psxSWL() { |
| 839 | u32 addr = _oB_; |
| 840 | u32 shift = addr & 3; |
| 841 | u32 mem = psxMemRead32(addr & ~3); |
| 842 | |
| 843 | psxMemWrite32(addr & ~3, (_u32(_rRt_) >> SWL_SHIFT[shift]) | |
| 844 | ( mem & SWL_MASK[shift]) ); |
| 845 | /* |
| 846 | Mem = 1234. Reg = abcd |
| 847 | |
| 848 | 0 123a (reg >> 24) | (mem & 0xffffff00) |
| 849 | 1 12ab (reg >> 16) | (mem & 0xffff0000) |
| 850 | 2 1abc (reg >> 8) | (mem & 0xff000000) |
| 851 | 3 abcd (reg ) | (mem & 0x00000000) |
| 852 | */ |
| 853 | } |
| 854 | |
| 855 | u32 SWR_MASK[4] = { 0, 0xff, 0xffff, 0xffffff }; |
| 856 | u32 SWR_SHIFT[4] = { 0, 8, 16, 24 }; |
| 857 | |
| 858 | void psxSWR() { |
| 859 | u32 addr = _oB_; |
| 860 | u32 shift = addr & 3; |
| 861 | u32 mem = psxMemRead32(addr & ~3); |
| 862 | |
| 863 | psxMemWrite32(addr & ~3, (_u32(_rRt_) << SWR_SHIFT[shift]) | |
| 864 | ( mem & SWR_MASK[shift]) ); |
| 865 | |
| 866 | /* |
| 867 | Mem = 1234. Reg = abcd |
| 868 | |
| 869 | 0 abcd (reg ) | (mem & 0x00000000) |
| 870 | 1 bcd4 (reg << 8) | (mem & 0x000000ff) |
| 871 | 2 cd34 (reg << 16) | (mem & 0x0000ffff) |
| 872 | 3 d234 (reg << 24) | (mem & 0x00ffffff) |
| 873 | */ |
| 874 | } |
| 875 | |
| 876 | /********************************************************* |
| 877 | * Moves between GPR and COPx * |
| 878 | * Format: OP rt, fs * |
| 879 | *********************************************************/ |
| 880 | void psxMFC0() { if (!_Rt_) return; _i32(_rRt_) = (int)_rFs_; } |
| 881 | void psxCFC0() { if (!_Rt_) return; _i32(_rRt_) = (int)_rFs_; } |
| 882 | |
| 883 | void psxTestSWInts() { |
| 884 | if (psxRegs.CP0.n.Cause & psxRegs.CP0.n.Status & 0x0300 && |
| 885 | psxRegs.CP0.n.Status & 0x1) { |
| 886 | psxRegs.CP0.n.Cause &= ~0x7c; |
| 887 | psxException(psxRegs.CP0.n.Cause, branch); |
| 888 | } |
| 889 | } |
| 890 | |
| 891 | void MTC0(int reg, u32 val) { |
| 892 | // SysPrintf("MTC0 %d: %x\n", reg, val); |
| 893 | switch (reg) { |
| 894 | case 12: // Status |
| 895 | psxRegs.CP0.r[12] = val; |
| 896 | psxTestSWInts(); |
| 897 | break; |
| 898 | |
| 899 | case 13: // Cause |
| 900 | psxRegs.CP0.n.Cause &= ~0x0300; |
| 901 | psxRegs.CP0.n.Cause |= val & 0x0300; |
| 902 | psxTestSWInts(); |
| 903 | break; |
| 904 | |
| 905 | default: |
| 906 | psxRegs.CP0.r[reg] = val; |
| 907 | break; |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | void psxMTC0() { MTC0(_Rd_, _u32(_rRt_)); } |
| 912 | void psxCTC0() { MTC0(_Rd_, _u32(_rRt_)); } |
| 913 | |
| 914 | /********************************************************* |
| 915 | * Unknow instruction (would generate an exception) * |
| 916 | * Format: ? * |
| 917 | *********************************************************/ |
| 918 | void psxNULL() { |
| 919 | #ifdef PSXCPU_LOG |
| 920 | PSXCPU_LOG("psx: Unimplemented op %x\n", psxRegs.code); |
| 921 | #endif |
| 922 | } |
| 923 | |
| 924 | void psxSPECIAL() { |
| 925 | psxSPC[_Funct_](); |
| 926 | } |
| 927 | |
| 928 | void psxREGIMM() { |
| 929 | psxREG[_Rt_](); |
| 930 | } |
| 931 | |
| 932 | void psxCOP0() { |
| 933 | psxCP0[_Rs_](); |
| 934 | } |
| 935 | |
| 936 | void psxCOP2() { |
| 937 | psxCP2[_Funct_]((struct psxCP2Regs *)&psxRegs.CP2D); |
| 938 | } |
| 939 | |
| 940 | void psxCOP2_stall() { |
| 941 | u32 f = _Funct_; |
| 942 | gteCheckStall(f); |
| 943 | psxCP2[f]((struct psxCP2Regs *)&psxRegs.CP2D); |
| 944 | } |
| 945 | |
| 946 | void psxBASIC(struct psxCP2Regs *regs) { |
| 947 | psxCP2BSC[_Rs_](); |
| 948 | } |
| 949 | |
| 950 | void psxHLE() { |
| 951 | // psxHLEt[psxRegs.code & 0xffff](); |
| 952 | // psxHLEt[psxRegs.code & 0x07](); // HDHOSHY experimental patch |
| 953 | uint32_t hleCode = psxRegs.code & 0x03ffffff; |
| 954 | if (hleCode >= (sizeof(psxHLEt) / sizeof(psxHLEt[0]))) { |
| 955 | psxNULL(); |
| 956 | } else { |
| 957 | psxHLEt[hleCode](); |
| 958 | } |
| 959 | } |
| 960 | |
| 961 | void (*psxBSC[64])() = { |
| 962 | psxSPECIAL, psxREGIMM, psxJ , psxJAL , psxBEQ , psxBNE , psxBLEZ, psxBGTZ, |
| 963 | psxADDI , psxADDIU , psxSLTI, psxSLTIU, psxANDI, psxORI , psxXORI, psxLUI , |
| 964 | psxCOP0 , psxNULL , psxCOP2, psxNULL , psxNULL, psxNULL, psxNULL, psxNULL, |
| 965 | psxNULL , psxNULL , psxNULL, psxNULL , psxNULL, psxNULL, psxNULL, psxNULL, |
| 966 | psxLB , psxLH , psxLWL , psxLW , psxLBU , psxLHU , psxLWR , psxNULL, |
| 967 | psxSB , psxSH , psxSWL , psxSW , psxNULL, psxNULL, psxSWR , psxNULL, |
| 968 | psxNULL , psxNULL , gteLWC2, psxNULL , psxNULL, psxNULL, psxNULL, psxNULL, |
| 969 | psxNULL , psxNULL , gteSWC2, psxHLE , psxNULL, psxNULL, psxNULL, psxNULL |
| 970 | }; |
| 971 | |
| 972 | |
| 973 | void (*psxSPC[64])() = { |
| 974 | psxSLL , psxNULL , psxSRL , psxSRA , psxSLLV , psxNULL , psxSRLV, psxSRAV, |
| 975 | psxJR , psxJALR , psxNULL, psxNULL, psxSYSCALL, psxBREAK, psxNULL, psxNULL, |
| 976 | psxMFHI, psxMTHI , psxMFLO, psxMTLO, psxNULL , psxNULL , psxNULL, psxNULL, |
| 977 | psxMULT, psxMULTU, psxDIV , psxDIVU, psxNULL , psxNULL , psxNULL, psxNULL, |
| 978 | psxADD , psxADDU , psxSUB , psxSUBU, psxAND , psxOR , psxXOR , psxNOR , |
| 979 | psxNULL, psxNULL , psxSLT , psxSLTU, psxNULL , psxNULL , psxNULL, psxNULL, |
| 980 | psxNULL, psxNULL , psxNULL, psxNULL, psxNULL , psxNULL , psxNULL, psxNULL, |
| 981 | psxNULL, psxNULL , psxNULL, psxNULL, psxNULL , psxNULL , psxNULL, psxNULL |
| 982 | }; |
| 983 | |
| 984 | void (*psxREG[32])() = { |
| 985 | psxBLTZ , psxBGEZ , psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, |
| 986 | psxNULL , psxNULL , psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, |
| 987 | psxBLTZAL, psxBGEZAL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, |
| 988 | psxNULL , psxNULL , psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL |
| 989 | }; |
| 990 | |
| 991 | void (*psxCP0[32])() = { |
| 992 | psxMFC0, psxNULL, psxCFC0, psxNULL, psxMTC0, psxNULL, psxCTC0, psxNULL, |
| 993 | psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, |
| 994 | psxRFE , psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, |
| 995 | psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL |
| 996 | }; |
| 997 | |
| 998 | void (*psxCP2[64])(struct psxCP2Regs *regs) = { |
| 999 | psxBASIC, gteRTPS , psxNULL , psxNULL, psxNULL, psxNULL , gteNCLIP, psxNULL, // 00 |
| 1000 | psxNULL , psxNULL , psxNULL , psxNULL, gteOP , psxNULL , psxNULL , psxNULL, // 08 |
| 1001 | gteDPCS , gteINTPL, gteMVMVA, gteNCDS, gteCDP , psxNULL , gteNCDT , psxNULL, // 10 |
| 1002 | psxNULL , psxNULL , psxNULL , gteNCCS, gteCC , psxNULL , gteNCS , psxNULL, // 18 |
| 1003 | gteNCT , psxNULL , psxNULL , psxNULL, psxNULL, psxNULL , psxNULL , psxNULL, // 20 |
| 1004 | gteSQR , gteDCPL , gteDPCT , psxNULL, psxNULL, gteAVSZ3, gteAVSZ4, psxNULL, // 28 |
| 1005 | gteRTPT , psxNULL , psxNULL , psxNULL, psxNULL, psxNULL , psxNULL , psxNULL, // 30 |
| 1006 | psxNULL , psxNULL , psxNULL , psxNULL, psxNULL, gteGPF , gteGPL , gteNCCT // 38 |
| 1007 | }; |
| 1008 | |
| 1009 | void (*psxCP2BSC[32])() = { |
| 1010 | gteMFC2, psxNULL, gteCFC2, psxNULL, gteMTC2, psxNULL, gteCTC2, psxNULL, |
| 1011 | psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, |
| 1012 | psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, |
| 1013 | psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL |
| 1014 | }; |
| 1015 | |
| 1016 | |
| 1017 | /////////////////////////////////////////// |
| 1018 | |
| 1019 | static int intInit() { |
| 1020 | return 0; |
| 1021 | } |
| 1022 | |
| 1023 | static void intReset() { |
| 1024 | memset(&ICache, 0xff, sizeof(ICache)); |
| 1025 | } |
| 1026 | |
| 1027 | void intExecute() { |
| 1028 | extern int stop; |
| 1029 | for (;!stop;) |
| 1030 | execI(); |
| 1031 | } |
| 1032 | |
| 1033 | void intExecuteBlock() { |
| 1034 | branch2 = 0; |
| 1035 | while (!branch2) execI(); |
| 1036 | } |
| 1037 | |
| 1038 | static void intClear(u32 Addr, u32 Size) { |
| 1039 | } |
| 1040 | |
| 1041 | void intNotify (int note, void *data) { |
| 1042 | /* Gameblabla - Only clear the icache if it's isolated */ |
| 1043 | if (note == R3000ACPU_NOTIFY_CACHE_ISOLATED) |
| 1044 | { |
| 1045 | memset(&ICache, 0xff, sizeof(ICache)); |
| 1046 | } |
| 1047 | } |
| 1048 | |
| 1049 | void intApplyConfig() { |
| 1050 | assert(psxBSC[18] == psxCOP2 || psxBSC[18] == psxCOP2_stall); |
| 1051 | assert(psxBSC[50] == gteLWC2 || psxBSC[50] == gteLWC2_stall); |
| 1052 | assert(psxBSC[58] == gteSWC2 || psxBSC[58] == gteSWC2_stall); |
| 1053 | assert(psxSPC[16] == psxMFHI || psxSPC[16] == psxMFHI_stall); |
| 1054 | assert(psxSPC[18] == psxMFLO || psxSPC[18] == psxMFLO_stall); |
| 1055 | assert(psxSPC[24] == psxMULT || psxSPC[24] == psxMULT_stall); |
| 1056 | assert(psxSPC[25] == psxMULTU || psxSPC[25] == psxMULTU_stall); |
| 1057 | assert(psxSPC[26] == psxDIV || psxSPC[26] == psxDIV_stall); |
| 1058 | assert(psxSPC[27] == psxDIVU || psxSPC[27] == psxDIVU_stall); |
| 1059 | |
| 1060 | if (Config.DisableStalls) { |
| 1061 | psxBSC[18] = psxCOP2; |
| 1062 | psxBSC[50] = gteLWC2; |
| 1063 | psxBSC[58] = gteSWC2; |
| 1064 | psxSPC[16] = psxMFHI; |
| 1065 | psxSPC[18] = psxMFLO; |
| 1066 | psxSPC[24] = psxMULT; |
| 1067 | psxSPC[25] = psxMULTU; |
| 1068 | psxSPC[26] = psxDIV; |
| 1069 | psxSPC[27] = psxDIVU; |
| 1070 | } else { |
| 1071 | psxBSC[18] = psxCOP2_stall; |
| 1072 | psxBSC[50] = gteLWC2_stall; |
| 1073 | psxBSC[58] = gteSWC2_stall; |
| 1074 | psxSPC[16] = psxMFHI_stall; |
| 1075 | psxSPC[18] = psxMFLO_stall; |
| 1076 | psxSPC[24] = psxMULT_stall; |
| 1077 | psxSPC[25] = psxMULTU_stall; |
| 1078 | psxSPC[26] = psxDIV_stall; |
| 1079 | psxSPC[27] = psxDIVU_stall; |
| 1080 | } |
| 1081 | |
| 1082 | // dynarec may occasionally call the interpreter, in such a case the |
| 1083 | // cache won't work (cache only works right if all fetches go through it) |
| 1084 | if (!Config.icache_emulation || psxCpu != &psxInt) |
| 1085 | fetch = fetchNoCache; |
| 1086 | else |
| 1087 | fetch = fetchICache; |
| 1088 | } |
| 1089 | |
| 1090 | static void intShutdown() { |
| 1091 | } |
| 1092 | |
| 1093 | // interpreter execution |
| 1094 | void execI() { |
| 1095 | psxRegs.code = fetch(psxRegs.pc); |
| 1096 | |
| 1097 | debugI(); |
| 1098 | |
| 1099 | if (Config.Debug) ProcessDebug(); |
| 1100 | |
| 1101 | psxRegs.pc += 4; |
| 1102 | psxRegs.cycle += BIAS; |
| 1103 | |
| 1104 | psxBSC[psxRegs.code >> 26](); |
| 1105 | } |
| 1106 | |
| 1107 | R3000Acpu psxInt = { |
| 1108 | intInit, |
| 1109 | intReset, |
| 1110 | intExecute, |
| 1111 | intExecuteBlock, |
| 1112 | intClear, |
| 1113 | intNotify, |
| 1114 | intApplyConfig, |
| 1115 | intShutdown |
| 1116 | }; |