--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. *
+ ***************************************************************************/
+
+/*
+ * PSX assembly interpreter.
+ */
+
+#include "psxcommon.h"
+#include "r3000a.h"
+#include "gte.h"
+#include "psxhle.h"
+#include "debug.h"
+
+static int branch = 0;
+static int branch2 = 0;
+static u32 branchPC;
+
+// These macros are used to assemble the repassembler functions
+
+#ifdef PSXCPU_LOG
+#define debugI() PSXCPU_LOG("%s\n", disR3000AF(psxRegs.code, psxRegs.pc));
+#else
+#define debugI()
+#endif
+
+#ifndef NDEBUG
+#include "debug.h"
+#else
+void StartDebugger() {}
+void ProcessDebug() {}
+void StopDebugger() {}
+#endif
+
+void execI();
+
+// Subsets
+void (*psxBSC[64])();
+void (*psxSPC[64])();
+void (*psxREG[32])();
+void (*psxCP0[32])();
+void (*psxCP2[64])(struct psxCP2Regs *regs);
+void (*psxCP2BSC[32])();
+
+#ifdef ICACHE_EMULATION
+/*
+Formula One 2001 :
+Use old CPU cache code when the RAM location is updated with new code (affects in-game racing)
+*/
+static u8* ICache_Addr;
+static u8* ICache_Code;
+uint32_t *Read_ICache(uint32_t pc)
+{
+ uint32_t pc_bank, pc_offset, pc_cache;
+ uint8_t *IAddr, *ICode;
+
+ pc_bank = pc >> 24;
+ pc_offset = pc & 0xffffff;
+ pc_cache = pc & 0xfff;
+
+ IAddr = ICache_Addr;
+ ICode = ICache_Code;
+
+ // cached - RAM
+ if (pc_bank == 0x80 || pc_bank == 0x00)
+ {
+ if (SWAP32(*(uint32_t *)(IAddr + pc_cache)) == pc_offset)
+ {
+ // Cache hit - return last opcode used
+ return (uint32_t *)(ICode + pc_cache);
+ }
+ else
+ {
+ // Cache miss - addresses don't match
+ // - default: 0xffffffff (not init)
+
+ // cache line is 4 bytes wide
+ pc_offset &= ~0xf;
+ pc_cache &= ~0xf;
+
+ // address line
+ *(uint32_t *)(IAddr + pc_cache + 0x0) = SWAP32(pc_offset + 0x0);
+ *(uint32_t *)(IAddr + pc_cache + 0x4) = SWAP32(pc_offset + 0x4);
+ *(uint32_t *)(IAddr + pc_cache + 0x8) = SWAP32(pc_offset + 0x8);
+ *(uint32_t *)(IAddr + pc_cache + 0xc) = SWAP32(pc_offset + 0xc);
+
+ // opcode line
+ pc_offset = pc & ~0xf;
+ *(uint32_t *)(ICode + pc_cache + 0x0) = psxMu32ref(pc_offset + 0x0);
+ *(uint32_t *)(ICode + pc_cache + 0x4) = psxMu32ref(pc_offset + 0x4);
+ *(uint32_t *)(ICode + pc_cache + 0x8) = psxMu32ref(pc_offset + 0x8);
+ *(uint32_t *)(ICode + pc_cache + 0xc) = psxMu32ref(pc_offset + 0xc);
+ }
+ }
+
+ /*
+ TODO: Probably should add cached BIOS
+ */
+ // default
+ return (uint32_t *)PSXM(pc);
+}
+#endif
+
+static void delayRead(int reg, u32 bpc) {
+ u32 rold, rnew;
+
+// SysPrintf("delayRead at %x!\n", psxRegs.pc);
+
+ rold = psxRegs.GPR.r[reg];
+ psxBSC[psxRegs.code >> 26](); // branch delay load
+ rnew = psxRegs.GPR.r[reg];
+
+ psxRegs.pc = bpc;
+
+ branch = 0;
+
+ psxRegs.GPR.r[reg] = rold;
+ execI(); // first branch opcode
+ psxRegs.GPR.r[reg] = rnew;
+
+ psxBranchTest();
+}
+
+static void delayWrite(int reg, u32 bpc) {
+
+/* SysPrintf("delayWrite at %x!\n", psxRegs.pc);
+
+ SysPrintf("%s\n", disR3000AF(psxRegs.code, psxRegs.pc-4));
+ SysPrintf("%s\n", disR3000AF(PSXMu32(bpc), bpc));*/
+
+ // no changes from normal behavior
+
+ psxBSC[psxRegs.code >> 26]();
+
+ branch = 0;
+ psxRegs.pc = bpc;
+
+ psxBranchTest();
+}
+
+static void delayReadWrite(int reg, u32 bpc) {
+
+// SysPrintf("delayReadWrite at %x!\n", psxRegs.pc);
+
+ // the branch delay load is skipped
+
+ branch = 0;
+ psxRegs.pc = bpc;
+
+ psxBranchTest();
+}
+
+// this defines shall be used with the tmp
+// of the next func (instead of _Funct_...)
+#define _tFunct_ ((tmp ) & 0x3F) // The funct part of the instruction register
+#define _tRd_ ((tmp >> 11) & 0x1F) // The rd part of the instruction register
+#define _tRt_ ((tmp >> 16) & 0x1F) // The rt part of the instruction register
+#define _tRs_ ((tmp >> 21) & 0x1F) // The rs part of the instruction register
+#define _tSa_ ((tmp >> 6) & 0x1F) // The sa part of the instruction register
+
+int psxTestLoadDelay(int reg, u32 tmp) {
+ if (tmp == 0) return 0; // NOP
+ switch (tmp >> 26) {
+ case 0x00: // SPECIAL
+ switch (_tFunct_) {
+ case 0x00: // SLL
+ case 0x02: case 0x03: // SRL/SRA
+ if (_tRd_ == reg && _tRt_ == reg) return 1; else
+ if (_tRt_ == reg) return 2; else
+ if (_tRd_ == reg) return 3;
+ break;
+
+ case 0x08: // JR
+ if (_tRs_ == reg) return 2;
+ break;
+ case 0x09: // JALR
+ if (_tRd_ == reg && _tRs_ == reg) return 1; else
+ if (_tRs_ == reg) return 2; else
+ if (_tRd_ == reg) return 3;
+ break;
+
+ // SYSCALL/BREAK just a break;
+
+ case 0x20: case 0x21: case 0x22: case 0x23:
+ case 0x24: case 0x25: case 0x26: case 0x27:
+ case 0x2a: case 0x2b: // ADD/ADDU...
+ case 0x04: case 0x06: case 0x07: // SLLV...
+ if (_tRd_ == reg && (_tRt_ == reg || _tRs_ == reg)) return 1; else
+ if (_tRt_ == reg || _tRs_ == reg) return 2; else
+ if (_tRd_ == reg) return 3;
+ break;
+
+ case 0x10: case 0x12: // MFHI/MFLO
+ if (_tRd_ == reg) return 3;
+ break;
+ case 0x11: case 0x13: // MTHI/MTLO
+ if (_tRs_ == reg) return 2;
+ break;
+
+ case 0x18: case 0x19:
+ case 0x1a: case 0x1b: // MULT/DIV...
+ if (_tRt_ == reg || _tRs_ == reg) return 2;
+ break;
+ }
+ break;
+
+ case 0x01: // REGIMM
+ switch (_tRt_) {
+ case 0x00: case 0x01:
+ case 0x10: case 0x11: // BLTZ/BGEZ...
+ // Xenogears - lbu v0 / beq v0
+ // - no load delay (fixes battle loading)
+ break;
+
+ if (_tRs_ == reg) return 2;
+ break;
+ }
+ break;
+
+ // J would be just a break;
+ case 0x03: // JAL
+ if (31 == reg) return 3;
+ break;
+
+ case 0x04: case 0x05: // BEQ/BNE
+ // Xenogears - lbu v0 / beq v0
+ // - no load delay (fixes battle loading)
+ break;
+
+ if (_tRs_ == reg || _tRt_ == reg) return 2;
+ break;
+
+ case 0x06: case 0x07: // BLEZ/BGTZ
+ // Xenogears - lbu v0 / beq v0
+ // - no load delay (fixes battle loading)
+ break;
+
+ if (_tRs_ == reg) return 2;
+ break;
+
+ case 0x08: case 0x09: case 0x0a: case 0x0b:
+ case 0x0c: case 0x0d: case 0x0e: // ADDI/ADDIU...
+ if (_tRt_ == reg && _tRs_ == reg) return 1; else
+ if (_tRs_ == reg) return 2; else
+ if (_tRt_ == reg) return 3;
+ break;
+
+ case 0x0f: // LUI
+ if (_tRt_ == reg) return 3;
+ break;
+
+ case 0x10: // COP0
+ switch (_tFunct_) {
+ case 0x00: // MFC0
+ if (_tRt_ == reg) return 3;
+ break;
+ case 0x02: // CFC0
+ if (_tRt_ == reg) return 3;
+ break;
+ case 0x04: // MTC0
+ if (_tRt_ == reg) return 2;
+ break;
+ case 0x06: // CTC0
+ if (_tRt_ == reg) return 2;
+ break;
+ // RFE just a break;
+ }
+ break;
+
+ case 0x12: // COP2
+ switch (_tFunct_) {
+ case 0x00:
+ switch (_tRs_) {
+ case 0x00: // MFC2
+ if (_tRt_ == reg) return 3;
+ break;
+ case 0x02: // CFC2
+ if (_tRt_ == reg) return 3;
+ break;
+ case 0x04: // MTC2
+ if (_tRt_ == reg) return 2;
+ break;
+ case 0x06: // CTC2
+ if (_tRt_ == reg) return 2;
+ break;
+ }
+ break;
+ // RTPS... break;
+ }
+ break;
+
+ case 0x22: case 0x26: // LWL/LWR
+ if (_tRt_ == reg) return 3; else
+ if (_tRs_ == reg) return 2;
+ break;
+
+ case 0x20: case 0x21: case 0x23:
+ case 0x24: case 0x25: // LB/LH/LW/LBU/LHU
+ if (_tRt_ == reg && _tRs_ == reg) return 1; else
+ if (_tRs_ == reg) return 2; else
+ if (_tRt_ == reg) return 3;
+ break;
+
+ case 0x28: case 0x29: case 0x2a:
+ case 0x2b: case 0x2e: // SB/SH/SWL/SW/SWR
+ if (_tRt_ == reg || _tRs_ == reg) return 2;
+ break;
+
+ case 0x32: case 0x3a: // LWC2/SWC2
+ if (_tRs_ == reg) return 2;
+ break;
+ }
+
+ return 0;
+}
+
+void psxDelayTest(int reg, u32 bpc) {
+ u32 *code;
+ u32 tmp;
+
+ #ifdef ICACHE_EMULATION
+ if (Config.icache_emulation)
+ {
+ code = Read_ICache(psxRegs.pc);
+ }
+ else
+ #endif
+ {
+ code = (u32 *)PSXM(psxRegs.pc);
+ }
+ tmp = ((code == NULL) ? 0 : SWAP32(*code));
+ branch = 1;
+
+ switch (psxTestLoadDelay(reg, tmp)) {
+ case 1:
+ delayReadWrite(reg, bpc); return;
+ case 2:
+ delayRead(reg, bpc); return;
+ case 3:
+ delayWrite(reg, bpc); return;
+ }
+ psxBSC[psxRegs.code >> 26]();
+
+ branch = 0;
+ psxRegs.pc = bpc;
+
+ psxBranchTest();
+}
+
+static u32 psxBranchNoDelay(void) {
+ u32 *code;
+ u32 temp;
+
+ #ifdef ICACHE_EMULATION
+ if (Config.icache_emulation)
+ {
+ code = Read_ICache(psxRegs.pc);
+ }
+ else
+ #endif
+ {
+ code = (u32 *)PSXM(psxRegs.pc);
+ }
+ psxRegs.code = ((code == NULL) ? 0 : SWAP32(*code));
+ switch (_Op_) {
+ case 0x00: // SPECIAL
+ switch (_Funct_) {
+ case 0x08: // JR
+ return _u32(_rRs_);
+ case 0x09: // JALR
+ temp = _u32(_rRs_);
+ if (_Rd_) { _SetLink(_Rd_); }
+ return temp;
+ }
+ break;
+ case 0x01: // REGIMM
+ switch (_Rt_) {
+ case 0x00: // BLTZ
+ if (_i32(_rRs_) < 0)
+ return _BranchTarget_;
+ break;
+ case 0x01: // BGEZ
+ if (_i32(_rRs_) >= 0)
+ return _BranchTarget_;
+ break;
+ case 0x08: // BLTZAL
+ if (_i32(_rRs_) < 0) {
+ _SetLink(31);
+ return _BranchTarget_;
+ }
+ break;
+ case 0x09: // BGEZAL
+ if (_i32(_rRs_) >= 0) {
+ _SetLink(31);
+ return _BranchTarget_;
+ }
+ break;
+ }
+ break;
+ case 0x02: // J
+ return _JumpTarget_;
+ case 0x03: // JAL
+ _SetLink(31);
+ return _JumpTarget_;
+ case 0x04: // BEQ
+ if (_i32(_rRs_) == _i32(_rRt_))
+ return _BranchTarget_;
+ break;
+ case 0x05: // BNE
+ if (_i32(_rRs_) != _i32(_rRt_))
+ return _BranchTarget_;
+ break;
+ case 0x06: // BLEZ
+ if (_i32(_rRs_) <= 0)
+ return _BranchTarget_;
+ break;
+ case 0x07: // BGTZ
+ if (_i32(_rRs_) > 0)
+ return _BranchTarget_;
+ break;
+ }
+
+ return (u32)-1;
+}
+
+static int psxDelayBranchExec(u32 tar) {
+ execI();
+
+ branch = 0;
+ psxRegs.pc = tar;
+ psxRegs.cycle += BIAS;
+ psxBranchTest();
+ return 1;
+}
+
+static int psxDelayBranchTest(u32 tar1) {
+ u32 tar2, tmp1, tmp2;
+
+ tar2 = psxBranchNoDelay();
+ if (tar2 == (u32)-1)
+ return 0;
+
+ debugI();
+
+ /*
+ * Branch in delay slot:
+ * - execute 1 instruction at tar1
+ * - jump to tar2 (target of branch in delay slot; this branch
+ * has no normal delay slot, instruction at tar1 was fetched instead)
+ */
+ psxRegs.pc = tar1;
+ tmp1 = psxBranchNoDelay();
+ if (tmp1 == (u32)-1) {
+ return psxDelayBranchExec(tar2);
+ }
+ debugI();
+ psxRegs.cycle += BIAS;
+
+ /*
+ * Got a branch at tar1:
+ * - execute 1 instruction at tar2
+ * - jump to target of that branch (tmp1)
+ */
+ psxRegs.pc = tar2;
+ tmp2 = psxBranchNoDelay();
+ if (tmp2 == (u32)-1) {
+ return psxDelayBranchExec(tmp1);
+ }
+ debugI();
+ psxRegs.cycle += BIAS;
+
+ /*
+ * Got a branch at tar2:
+ * - execute 1 instruction at tmp1
+ * - jump to target of that branch (tmp2)
+ */
+ psxRegs.pc = tmp1;
+ return psxDelayBranchExec(tmp2);
+}
+
+static void doBranch(u32 tar) {
+ u32 *code;
+ u32 tmp;
+
+ branch2 = branch = 1;
+ branchPC = tar;
+
+ // check for branch in delay slot
+ if (psxDelayBranchTest(tar))
+ return;
+
+ #ifdef ICACHE_EMULATION
+ if (Config.icache_emulation)
+ {
+ code = Read_ICache(psxRegs.pc);
+ }
+ else
+ #endif
+ {
+ code = (u32 *)PSXM(psxRegs.pc);
+ }
+ psxRegs.code = ((code == NULL) ? 0 : SWAP32(*code));
+
+ debugI();
+
+ psxRegs.pc += 4;
+ psxRegs.cycle += BIAS;
+
+ // check for load delay
+ tmp = psxRegs.code >> 26;
+ switch (tmp) {
+ case 0x10: // COP0
+ switch (_Rs_) {
+ case 0x00: // MFC0
+ case 0x02: // CFC0
+ psxDelayTest(_Rt_, branchPC);
+ return;
+ }
+ break;
+ case 0x12: // COP2
+ switch (_Funct_) {
+ case 0x00:
+ switch (_Rs_) {
+ case 0x00: // MFC2
+ case 0x02: // CFC2
+ psxDelayTest(_Rt_, branchPC);
+ return;
+ }
+ break;
+ }
+ break;
+ case 0x32: // LWC2
+ psxDelayTest(_Rt_, branchPC);
+ return;
+ default:
+ if (tmp >= 0x20 && tmp <= 0x26) { // LB/LH/LWL/LW/LBU/LHU/LWR
+ psxDelayTest(_Rt_, branchPC);
+ return;
+ }
+ break;
+ }
+
+ psxBSC[psxRegs.code >> 26]();
+
+ branch = 0;
+ psxRegs.pc = branchPC;
+
+ psxBranchTest();
+}
+
+/*********************************************************
+* Arithmetic with immediate operand *
+* Format: OP rt, rs, immediate *
+*********************************************************/
+void psxADDI() { if (!_Rt_) return; _rRt_ = _u32(_rRs_) + _Imm_ ; } // Rt = Rs + Im (Exception on Integer Overflow)
+void psxADDIU() { if (!_Rt_) return; _rRt_ = _u32(_rRs_) + _Imm_ ; } // Rt = Rs + Im
+void psxANDI() { if (!_Rt_) return; _rRt_ = _u32(_rRs_) & _ImmU_; } // Rt = Rs And Im
+void psxORI() { if (!_Rt_) return; _rRt_ = _u32(_rRs_) | _ImmU_; } // Rt = Rs Or Im
+void psxXORI() { if (!_Rt_) return; _rRt_ = _u32(_rRs_) ^ _ImmU_; } // Rt = Rs Xor Im
+void psxSLTI() { if (!_Rt_) return; _rRt_ = _i32(_rRs_) < _Imm_ ; } // Rt = Rs < Im (Signed)
+void psxSLTIU() { if (!_Rt_) return; _rRt_ = _u32(_rRs_) < ((u32)_Imm_); } // Rt = Rs < Im (Unsigned)
+
+/*********************************************************
+* Register arithmetic *
+* Format: OP rd, rs, rt *
+*********************************************************/
+void psxADD() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) + _u32(_rRt_); } // Rd = Rs + Rt (Exception on Integer Overflow)
+void psxADDU() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) + _u32(_rRt_); } // Rd = Rs + Rt
+void psxSUB() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) - _u32(_rRt_); } // Rd = Rs - Rt (Exception on Integer Overflow)
+void psxSUBU() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) - _u32(_rRt_); } // Rd = Rs - Rt
+void psxAND() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) & _u32(_rRt_); } // Rd = Rs And Rt
+void psxOR() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) | _u32(_rRt_); } // Rd = Rs Or Rt
+void psxXOR() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) ^ _u32(_rRt_); } // Rd = Rs Xor Rt
+void psxNOR() { if (!_Rd_) return; _rRd_ =~(_u32(_rRs_) | _u32(_rRt_)); }// Rd = Rs Nor Rt
+void psxSLT() { if (!_Rd_) return; _rRd_ = _i32(_rRs_) < _i32(_rRt_); } // Rd = Rs < Rt (Signed)
+void psxSLTU() { if (!_Rd_) return; _rRd_ = _u32(_rRs_) < _u32(_rRt_); } // Rd = Rs < Rt (Unsigned)
+
+/*********************************************************
+* Register mult/div & Register trap logic *
+* Format: OP rs, rt *
+*********************************************************/
+void psxDIV() {
+ if (!_i32(_rRt_)) {
+ _i32(_rHi_) = _i32(_rRs_);
+ if (_i32(_rRs_) & 0x80000000) {
+ _i32(_rLo_) = 1;
+ } else {
+ _i32(_rLo_) = 0xFFFFFFFF;
+ }
+ } else if (_i32(_rRs_) == 0x80000000 && _i32(_rRt_) == 0xFFFFFFFF) {
+ _i32(_rLo_) = 0x80000000;
+ _i32(_rHi_) = 0;
+ } else {
+ _i32(_rLo_) = _i32(_rRs_) / _i32(_rRt_);
+ _i32(_rHi_) = _i32(_rRs_) % _i32(_rRt_);
+ }
+}
+
+void psxDIVU() {
+ if (_rRt_ != 0) {
+ _rLo_ = _rRs_ / _rRt_;
+ _rHi_ = _rRs_ % _rRt_;
+ }
+ else {
+ _i32(_rLo_) = 0xffffffff;
+ _i32(_rHi_) = _i32(_rRs_);
+ }
+}
+
+void psxMULT() {
+ u64 res = (s64)((s64)_i32(_rRs_) * (s64)_i32(_rRt_));
+
+ psxRegs.GPR.n.lo = (u32)(res & 0xffffffff);
+ psxRegs.GPR.n.hi = (u32)((res >> 32) & 0xffffffff);
+}
+
+void psxMULTU() {
+ u64 res = (u64)((u64)_u32(_rRs_) * (u64)_u32(_rRt_));
+
+ psxRegs.GPR.n.lo = (u32)(res & 0xffffffff);
+ psxRegs.GPR.n.hi = (u32)((res >> 32) & 0xffffffff);
+}
+
+/*********************************************************
+* Register branch logic *
+* Format: OP rs, offset *
+*********************************************************/
+#define RepZBranchi32(op) if(_i32(_rRs_) op 0) doBranch(_BranchTarget_);
+#define RepZBranchLinki32(op) if(_i32(_rRs_) op 0) { _SetLink(31); doBranch(_BranchTarget_); }
+
+void psxBGEZ() { RepZBranchi32(>=) } // Branch if Rs >= 0
+void psxBGEZAL() { RepZBranchLinki32(>=) } // Branch if Rs >= 0 and link
+void psxBGTZ() { RepZBranchi32(>) } // Branch if Rs > 0
+void psxBLEZ() { RepZBranchi32(<=) } // Branch if Rs <= 0
+void psxBLTZ() { RepZBranchi32(<) } // Branch if Rs < 0
+void psxBLTZAL() { RepZBranchLinki32(<) } // Branch if Rs < 0 and link
+
+/*********************************************************
+* Shift arithmetic with constant shift *
+* Format: OP rd, rt, sa *
+*********************************************************/
+void psxSLL() { if (!_Rd_) return; _u32(_rRd_) = _u32(_rRt_) << _Sa_; } // Rd = Rt << sa
+void psxSRA() { if (!_Rd_) return; _i32(_rRd_) = _i32(_rRt_) >> _Sa_; } // Rd = Rt >> sa (arithmetic)
+void psxSRL() { if (!_Rd_) return; _u32(_rRd_) = _u32(_rRt_) >> _Sa_; } // Rd = Rt >> sa (logical)
+
+/*********************************************************
+* Shift arithmetic with variant register shift *
+* Format: OP rd, rt, rs *
+*********************************************************/
+void psxSLLV() { if (!_Rd_) return; _u32(_rRd_) = _u32(_rRt_) << _u32(_rRs_); } // Rd = Rt << rs
+void psxSRAV() { if (!_Rd_) return; _i32(_rRd_) = _i32(_rRt_) >> _u32(_rRs_); } // Rd = Rt >> rs (arithmetic)
+void psxSRLV() { if (!_Rd_) return; _u32(_rRd_) = _u32(_rRt_) >> _u32(_rRs_); } // Rd = Rt >> rs (logical)
+
+/*********************************************************
+* Load higher 16 bits of the first word in GPR with imm *
+* Format: OP rt, immediate *
+*********************************************************/
+void psxLUI() { if (!_Rt_) return; _u32(_rRt_) = psxRegs.code << 16; } // Upper halfword of Rt = Im
+
+/*********************************************************
+* Move from HI/LO to GPR *
+* Format: OP rd *
+*********************************************************/
+void psxMFHI() { if (!_Rd_) return; _rRd_ = _rHi_; } // Rd = Hi
+void psxMFLO() { if (!_Rd_) return; _rRd_ = _rLo_; } // Rd = Lo
+
+/*********************************************************
+* Move to GPR to HI/LO & Register jump *
+* Format: OP rs *
+*********************************************************/
+void psxMTHI() { _rHi_ = _rRs_; } // Hi = Rs
+void psxMTLO() { _rLo_ = _rRs_; } // Lo = Rs
+
+/*********************************************************
+* Special purpose instructions *
+* Format: OP *
+*********************************************************/
+void psxBREAK() {
+ // Break exception - psx rom doens't handles this
+}
+
+void psxSYSCALL() {
+ psxRegs.pc -= 4;
+ psxException(0x20, branch);
+}
+
+void psxRFE() {
+// SysPrintf("psxRFE\n");
+ psxRegs.CP0.n.Status = (psxRegs.CP0.n.Status & 0xfffffff0) |
+ ((psxRegs.CP0.n.Status & 0x3c) >> 2);
+}
+
+/*********************************************************
+* Register branch logic *
+* Format: OP rs, rt, offset *
+*********************************************************/
+#define RepBranchi32(op) if(_i32(_rRs_) op _i32(_rRt_)) doBranch(_BranchTarget_);
+
+void psxBEQ() { RepBranchi32(==) } // Branch if Rs == Rt
+void psxBNE() { RepBranchi32(!=) } // Branch if Rs != Rt
+
+/*********************************************************
+* Jump to target *
+* Format: OP target *
+*********************************************************/
+void psxJ() { doBranch(_JumpTarget_); }
+void psxJAL() { _SetLink(31); doBranch(_JumpTarget_); }
+
+/*********************************************************
+* Register jump *
+* Format: OP rs, rd *
+*********************************************************/
+void psxJR() {
+ doBranch(_u32(_rRs_));
+ psxJumpTest();
+}
+
+void psxJALR() {
+ u32 temp = _u32(_rRs_);
+ if (_Rd_) { _SetLink(_Rd_); }
+ doBranch(temp);
+}
+
+/*********************************************************
+* Load and store for GPR *
+* Format: OP rt, offset(base) *
+*********************************************************/
+
+#define _oB_ (_u32(_rRs_) + _Imm_)
+
+void psxLB() {
+ if (_Rt_) {
+ _i32(_rRt_) = (signed char)psxMemRead8(_oB_);
+ } else {
+ psxMemRead8(_oB_);
+ }
+}
+
+void psxLBU() {
+ if (_Rt_) {
+ _u32(_rRt_) = psxMemRead8(_oB_);
+ } else {
+ psxMemRead8(_oB_);
+ }
+}
+
+void psxLH() {
+ if (_Rt_) {
+ _i32(_rRt_) = (short)psxMemRead16(_oB_);
+ } else {
+ psxMemRead16(_oB_);
+ }
+}
+
+void psxLHU() {
+ if (_Rt_) {
+ _u32(_rRt_) = psxMemRead16(_oB_);
+ } else {
+ psxMemRead16(_oB_);
+ }
+}
+
+void psxLW() {
+ if (_Rt_) {
+ _u32(_rRt_) = psxMemRead32(_oB_);
+ } else {
+ psxMemRead32(_oB_);
+ }
+}
+
+u32 LWL_MASK[4] = { 0xffffff, 0xffff, 0xff, 0 };
+u32 LWL_SHIFT[4] = { 24, 16, 8, 0 };
+
+void psxLWL() {
+ u32 addr = _oB_;
+ u32 shift = addr & 3;
+ u32 mem = psxMemRead32(addr & ~3);
+
+ if (!_Rt_) return;
+ _u32(_rRt_) = ( _u32(_rRt_) & LWL_MASK[shift]) |
+ ( mem << LWL_SHIFT[shift]);
+
+ /*
+ Mem = 1234. Reg = abcd
+
+ 0 4bcd (mem << 24) | (reg & 0x00ffffff)
+ 1 34cd (mem << 16) | (reg & 0x0000ffff)
+ 2 234d (mem << 8) | (reg & 0x000000ff)
+ 3 1234 (mem ) | (reg & 0x00000000)
+ */
+}
+
+u32 LWR_MASK[4] = { 0, 0xff000000, 0xffff0000, 0xffffff00 };
+u32 LWR_SHIFT[4] = { 0, 8, 16, 24 };
+
+void psxLWR() {
+ u32 addr = _oB_;
+ u32 shift = addr & 3;
+ u32 mem = psxMemRead32(addr & ~3);
+
+ if (!_Rt_) return;
+ _u32(_rRt_) = ( _u32(_rRt_) & LWR_MASK[shift]) |
+ ( mem >> LWR_SHIFT[shift]);
+
+ /*
+ Mem = 1234. Reg = abcd
+
+ 0 1234 (mem ) | (reg & 0x00000000)
+ 1 a123 (mem >> 8) | (reg & 0xff000000)
+ 2 ab12 (mem >> 16) | (reg & 0xffff0000)
+ 3 abc1 (mem >> 24) | (reg & 0xffffff00)
+ */
+}
+
+void psxSB() { psxMemWrite8 (_oB_, _rRt_ & 0xff); }
+void psxSH() { psxMemWrite16(_oB_, _rRt_ & 0xffff); }
+void psxSW() { psxMemWrite32(_oB_, _rRt_); }
+
+u32 SWL_MASK[4] = { 0xffffff00, 0xffff0000, 0xff000000, 0 };
+u32 SWL_SHIFT[4] = { 24, 16, 8, 0 };
+
+void psxSWL() {
+ u32 addr = _oB_;
+ u32 shift = addr & 3;
+ u32 mem = psxMemRead32(addr & ~3);
+
+ psxMemWrite32(addr & ~3, (_u32(_rRt_) >> SWL_SHIFT[shift]) |
+ ( mem & SWL_MASK[shift]) );
+ /*
+ Mem = 1234. Reg = abcd
+
+ 0 123a (reg >> 24) | (mem & 0xffffff00)
+ 1 12ab (reg >> 16) | (mem & 0xffff0000)
+ 2 1abc (reg >> 8) | (mem & 0xff000000)
+ 3 abcd (reg ) | (mem & 0x00000000)
+ */
+}
+
+u32 SWR_MASK[4] = { 0, 0xff, 0xffff, 0xffffff };
+u32 SWR_SHIFT[4] = { 0, 8, 16, 24 };
+
+void psxSWR() {
+ u32 addr = _oB_;
+ u32 shift = addr & 3;
+ u32 mem = psxMemRead32(addr & ~3);
+
+ psxMemWrite32(addr & ~3, (_u32(_rRt_) << SWR_SHIFT[shift]) |
+ ( mem & SWR_MASK[shift]) );
+
+ /*
+ Mem = 1234. Reg = abcd
+
+ 0 abcd (reg ) | (mem & 0x00000000)
+ 1 bcd4 (reg << 8) | (mem & 0x000000ff)
+ 2 cd34 (reg << 16) | (mem & 0x0000ffff)
+ 3 d234 (reg << 24) | (mem & 0x00ffffff)
+ */
+}
+
+/*********************************************************
+* Moves between GPR and COPx *
+* Format: OP rt, fs *
+*********************************************************/
+void psxMFC0() { if (!_Rt_) return; _i32(_rRt_) = (int)_rFs_; }
+void psxCFC0() { if (!_Rt_) return; _i32(_rRt_) = (int)_rFs_; }
+
+void psxTestSWInts() {
+ if (psxRegs.CP0.n.Cause & psxRegs.CP0.n.Status & 0x0300 &&
+ psxRegs.CP0.n.Status & 0x1) {
+ psxRegs.CP0.n.Cause &= ~0x7c;
+ psxException(psxRegs.CP0.n.Cause, branch);
+ }
+}
+
+void MTC0(int reg, u32 val) {
+// SysPrintf("MTC0 %d: %x\n", reg, val);
+ switch (reg) {
+ case 12: // Status
+ psxRegs.CP0.r[12] = val;
+ psxTestSWInts();
+ break;
+
+ case 13: // Cause
+ psxRegs.CP0.n.Cause &= ~0x0300;
+ psxRegs.CP0.n.Cause |= val & 0x0300;
+ psxTestSWInts();
+ break;
+
+ default:
+ psxRegs.CP0.r[reg] = val;
+ break;
+ }
+}
+
+void psxMTC0() { MTC0(_Rd_, _u32(_rRt_)); }
+void psxCTC0() { MTC0(_Rd_, _u32(_rRt_)); }
+
+/*********************************************************
+* Unknow instruction (would generate an exception) *
+* Format: ? *
+*********************************************************/
+void psxNULL() {
+#ifdef PSXCPU_LOG
+ PSXCPU_LOG("psx: Unimplemented op %x\n", psxRegs.code);
+#endif
+}
+
+void psxSPECIAL() {
+ psxSPC[_Funct_]();
+}
+
+void psxREGIMM() {
+ psxREG[_Rt_]();
+}
+
+void psxCOP0() {
+ psxCP0[_Rs_]();
+}
+
+void psxCOP2() {
+ psxCP2[_Funct_]((struct psxCP2Regs *)&psxRegs.CP2D);
+}
+
+void psxBASIC(struct psxCP2Regs *regs) {
+ psxCP2BSC[_Rs_]();
+}
+
+void psxHLE() {
+// psxHLEt[psxRegs.code & 0xffff]();
+// psxHLEt[psxRegs.code & 0x07](); // HDHOSHY experimental patch
+ uint32_t hleCode = psxRegs.code & 0x03ffffff;
+ if (hleCode >= (sizeof(psxHLEt) / sizeof(psxHLEt[0]))) {
+ psxNULL();
+ } else {
+ psxHLEt[hleCode]();
+ }
+}
+
+void (*psxBSC[64])() = {
+ psxSPECIAL, psxREGIMM, psxJ , psxJAL , psxBEQ , psxBNE , psxBLEZ, psxBGTZ,
+ psxADDI , psxADDIU , psxSLTI, psxSLTIU, psxANDI, psxORI , psxXORI, psxLUI ,
+ psxCOP0 , psxNULL , psxCOP2, psxNULL , psxNULL, psxNULL, psxNULL, psxNULL,
+ psxNULL , psxNULL , psxNULL, psxNULL , psxNULL, psxNULL, psxNULL, psxNULL,
+ psxLB , psxLH , psxLWL , psxLW , psxLBU , psxLHU , psxLWR , psxNULL,
+ psxSB , psxSH , psxSWL , psxSW , psxNULL, psxNULL, psxSWR , psxNULL,
+ psxNULL , psxNULL , gteLWC2, psxNULL , psxNULL, psxNULL, psxNULL, psxNULL,
+ psxNULL , psxNULL , gteSWC2, psxHLE , psxNULL, psxNULL, psxNULL, psxNULL
+};
+
+
+void (*psxSPC[64])() = {
+ psxSLL , psxNULL , psxSRL , psxSRA , psxSLLV , psxNULL , psxSRLV, psxSRAV,
+ psxJR , psxJALR , psxNULL, psxNULL, psxSYSCALL, psxBREAK, psxNULL, psxNULL,
+ psxMFHI, psxMTHI , psxMFLO, psxMTLO, psxNULL , psxNULL , psxNULL, psxNULL,
+ psxMULT, psxMULTU, psxDIV , psxDIVU, psxNULL , psxNULL , psxNULL, psxNULL,
+ psxADD , psxADDU , psxSUB , psxSUBU, psxAND , psxOR , psxXOR , psxNOR ,
+ psxNULL, psxNULL , psxSLT , psxSLTU, psxNULL , psxNULL , psxNULL, psxNULL,
+ psxNULL, psxNULL , psxNULL, psxNULL, psxNULL , psxNULL , psxNULL, psxNULL,
+ psxNULL, psxNULL , psxNULL, psxNULL, psxNULL , psxNULL , psxNULL, psxNULL
+};
+
+void (*psxREG[32])() = {
+ psxBLTZ , psxBGEZ , psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL,
+ psxNULL , psxNULL , psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL,
+ psxBLTZAL, psxBGEZAL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL,
+ psxNULL , psxNULL , psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL
+};
+
+void (*psxCP0[32])() = {
+ psxMFC0, psxNULL, psxCFC0, psxNULL, psxMTC0, psxNULL, psxCTC0, psxNULL,
+ psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL,
+ psxRFE , psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL,
+ psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL
+};
+
+void (*psxCP2[64])(struct psxCP2Regs *regs) = {
+ psxBASIC, gteRTPS , psxNULL , psxNULL, psxNULL, psxNULL , gteNCLIP, psxNULL, // 00
+ psxNULL , psxNULL , psxNULL , psxNULL, gteOP , psxNULL , psxNULL , psxNULL, // 08
+ gteDPCS , gteINTPL, gteMVMVA, gteNCDS, gteCDP , psxNULL , gteNCDT , psxNULL, // 10
+ psxNULL , psxNULL , psxNULL , gteNCCS, gteCC , psxNULL , gteNCS , psxNULL, // 18
+ gteNCT , psxNULL , psxNULL , psxNULL, psxNULL, psxNULL , psxNULL , psxNULL, // 20
+ gteSQR , gteDCPL , gteDPCT , psxNULL, psxNULL, gteAVSZ3, gteAVSZ4, psxNULL, // 28
+ gteRTPT , psxNULL , psxNULL , psxNULL, psxNULL, psxNULL , psxNULL , psxNULL, // 30
+ psxNULL , psxNULL , psxNULL , psxNULL, psxNULL, gteGPF , gteGPL , gteNCCT // 38
+};
+
+void (*psxCP2BSC[32])() = {
+ gteMFC2, psxNULL, gteCFC2, psxNULL, gteMTC2, psxNULL, gteCTC2, psxNULL,
+ psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL,
+ psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL,
+ psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL
+};
+
+
+///////////////////////////////////////////
+
+static int intInit() {
+#ifdef ICACHE_EMULATION
+ if (!ICache_Addr)
+ {
+ ICache_Addr = malloc(0x1000);
+ if (!ICache_Addr)
+ {
+ return -1;
+ }
+ }
+
+ if (!ICache_Code)
+ {
+ ICache_Code = malloc(0x1000);
+ if (!ICache_Code)
+ {
+ return -1;
+ }
+ }
+ memset(ICache_Addr, 0xff, 0x1000);
+ memset(ICache_Code, 0xff, 0x1000);
+#endif
+ return 0;
+}
+
+static void intReset() {
+#ifdef ICACHE_EMULATION
+ memset(ICache_Addr, 0xff, 0x1000);
+ memset(ICache_Code, 0xff, 0x1000);
+#endif
+}
+
+void intExecute() {
+ extern int stop;
+ for (;!stop;)
+ execI();
+}
+
+void intExecuteBlock() {
+ branch2 = 0;
+ while (!branch2) execI();
+}
+
+static void intClear(u32 Addr, u32 Size) {
+}
+
+void intNotify (int note, void *data) {
+#ifdef ICACHE_EMULATION
+ /* Gameblabla - Only clear the icache if it's isolated */
+ if (note == R3000ACPU_NOTIFY_CACHE_ISOLATED)
+ {
+ memset(ICache_Addr, 0xff, 0x1000);
+ memset(ICache_Code, 0xff, 0x1000);
+ }
+#endif
+}
+
+static void intShutdown() {
+#ifdef ICACHE_EMULATION
+ if (ICache_Addr)
+ {
+ free(ICache_Addr);
+ ICache_Addr = NULL;
+ }
+
+ if (ICache_Code)
+ {
+ free(ICache_Code);
+ ICache_Code = NULL;
+ }
+#endif
+}
+
+// interpreter execution
+void execI() {
+#ifndef ICACHE_EMULATION
+ u32 *code = (u32 *)PSXM(psxRegs.pc);
+#else
+ u32 *code = Read_ICache(psxRegs.pc);
+#endif
+
+ psxRegs.code = ((code == NULL) ? 0 : SWAP32(*code));
+
+ debugI();
+
+ if (Config.Debug) ProcessDebug();
+
+ psxRegs.pc += 4;
+ psxRegs.cycle += BIAS;
+
+ psxBSC[psxRegs.code >> 26]();
+}
+
+R3000Acpu psxInt = {
+ intInit,
+ intReset,
+ intExecute,
+ intExecuteBlock,
+ intClear,
+#ifdef ICACHE_EMULATION
+ intNotify,
+#endif
+ intShutdown
+};
notaz.gp2x.de / pcsx_rearmed.git / commitdiff