ShuriZma
/
pcsx2
mirror of https://github.com/PCSX2/pcsx2.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
pcsx2/pcsx2/R5900OpcodeImpl.cpp

939 lines
31 KiB
C++
Raw Blame History

/* PCSX2 - PS2 Emulator for PCs
* Copyright (C) 2002-2009 PCSX2 Dev Team
*
* PCSX2 is free software: you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* PCSX2 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 PCSX2.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "PrecompiledHeader.h"
#include "Common.h"
#include <float.h>
#include "R5900.h"
#include "R5900OpcodeTables.h"
#include "R5900Exceptions.h"
static __forceinline s64 _add64_Overflow( s64 x, s64 y )
{
const s64 result = x + y;
// Let's all give gigaherz a big round of applause for finding this gem,
// which apparently works, and generates compact/fast x86 code too (the
// other method below is like 5-10 times slower).
if( ((~(x^y))&(x^result)) < 0 )
cpuException(0x30, cpuRegs.branch); // fixme: is 0x30 right for overflow??
// the not-as-fast style!
//if( ((x >= 0) && (y >= 0) && (result < 0)) ||
// ((x < 0) && (y < 0) && (result >= 0)) )
// cpuException(0x30, cpuRegs.branch);
return result;
}
static __forceinline s64 _add32_Overflow( s32 x, s32 y )
{
GPR_reg64 result; result.SD[0] = (s64)x + y;
// This 32bit method can rely on the MIPS documented method of checking for
// overflow, whichs imply compares bit 32 (rightmost bit of the upper word),
// against bit 31 (leftmost of the lower word).
// If bit32 != bit31 then we have an overflow.
if( (result.UL[0]>>31) != (result.UL[1] & 1) )
cpuException(0x30, cpuRegs.branch);
return result.SD[0];
}
namespace R5900
{
const OPCODE& GetCurrentInstruction()
{
const OPCODE* opcode = &R5900::OpcodeTables::tbl_Standard[_Opcode_];
while( opcode->getsubclass != NULL )
opcode = &opcode->getsubclass();
return *opcode;
}
const char * const bios[256]=
{
//0x00
"RFU000_FullReset", "ResetEE", "SetGsCrt", "RFU003",
"Exit", "RFU005", "LoadExecPS2", "ExecPS2",
"RFU008", "RFU009", "AddSbusIntcHandler", "RemoveSbusIntcHandler",
"Interrupt2Iop", "SetVTLBRefillHandler", "SetVCommonHandler", "SetVInterruptHandler",
//0x10
"AddIntcHandler", "RemoveIntcHandler", "AddDmacHandler", "RemoveDmacHandler",
"_EnableIntc", "_DisableIntc", "_EnableDmac", "_DisableDmac",
"_SetAlarm", "_ReleaseAlarm", "_iEnableIntc", "_iDisableIntc",
"_iEnableDmac", "_iDisableDmac", "_iSetAlarm", "_iReleaseAlarm",
//0x20
"CreateThread", "DeleteThread", "StartThread", "ExitThread",
"ExitDeleteThread", "TerminateThread", "iTerminateThread", "DisableDispatchThread",
"EnableDispatchThread", "ChangeThreadPriority", "iChangeThreadPriority", "RotateThreadReadyQueue",
"iRotateThreadReadyQueue", "ReleaseWaitThread", "iReleaseWaitThread", "GetThreadId",
//0x30
"ReferThreadStatus","iReferThreadStatus", "SleepThread", "WakeupThread",
"_iWakeupThread", "CancelWakeupThread", "iCancelWakeupThread", "SuspendThread",
"iSuspendThread", "ResumeThread", "iResumeThread", "JoinThread",
"RFU060", "RFU061", "EndOfHeap", "RFU063",
//0x40
"CreateSema", "DeleteSema", "SignalSema", "iSignalSema",
"WaitSema", "PollSema", "iPollSema", "ReferSemaStatus",
"iReferSemaStatus", "RFU073", "SetOsdConfigParam", "GetOsdConfigParam",
"GetGsHParam", "GetGsVParam", "SetGsHParam", "SetGsVParam",
//0x50
"RFU080_CreateEventFlag", "RFU081_DeleteEventFlag",
"RFU082_SetEventFlag", "RFU083_iSetEventFlag",
"RFU084_ClearEventFlag", "RFU085_iClearEventFlag",
"RFU086_WaitEventFlag", "RFU087_PollEventFlag",
"RFU088_iPollEventFlag", "RFU089_ReferEventFlagStatus",
"RFU090_iReferEventFlagStatus", "RFU091_GetEntryAddress",
"EnableIntcHandler_iEnableIntcHandler",
"DisableIntcHandler_iDisableIntcHandler",
"EnableDmacHandler_iEnableDmacHandler",
"DisableDmacHandler_iDisableDmacHandler",
//0x60
"KSeg0", "EnableCache", "DisableCache", "GetCop0",
"FlushCache", "RFU101", "CpuConfig", "iGetCop0",
"iFlushCache", "RFU105", "iCpuConfig", "sceSifStopDma",
"SetCPUTimerHandler", "SetCPUTimer", "SetOsdConfigParam2", "SetOsdConfigParam2",
//0x70
"GsGetIMR_iGsGetIMR", "GsGetIMR_iGsPutIMR", "SetPgifHandler", "SetVSyncFlag",
"RFU116", "print", "sceSifDmaStat_isceSifDmaStat", "sceSifSetDma_isceSifSetDma",
"sceSifSetDChain_isceSifSetDChain", "sceSifSetReg", "sceSifGetReg", "ExecOSD",
"Deci2Call", "PSMode", "MachineType", "GetMemorySize",
};
namespace Interpreter {
namespace OpcodeImpl {
void COP2()
{
//std::string disOut;
//disR5900Fasm(disOut, cpuRegs.code, cpuRegs.pc);
//VU0_LOG("%s", disOut.c_str());
Int_COP2PrintTable[_Rs_]();
}
void Unknown() {
CPU_LOG("%8.8lx: Unknown opcode called", cpuRegs.pc);
}
void MMI_Unknown() { Console.Warning("Unknown MMI opcode called"); }
void COP0_Unknown() { Console.Warning("Unknown COP0 opcode called"); }
void COP1_Unknown() { Console.Warning("Unknown FPU/COP1 opcode called"); }
/*********************************************************
* Arithmetic with immediate operand *
* Format: OP rt, rs, immediate *
*********************************************************/
// Implementation Notes:
// * It is important that instructions perform overflow checks prior to shortcutting on
// the zero register (when it is used as a destination). Overflow exceptions are still
// handled even though the result is discarded.
// Rt = Rs + Im signed [exception on overflow]
void ADDI()
{
s64 result = _add32_Overflow( cpuRegs.GPR.r[_Rs_].SD[0], _Imm_ );
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].SD[0] = result;
}
// Rt = Rs + Im signed !!! [overflow ignored]
// This instruction is effectively identical to ADDI. It is not a true unsigned operation,
// but rather it is a signed operation that ignores overflows.
void ADDIU()
{
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].SD[0] = cpuRegs.GPR.r[_Rs_].SL[0] + _Imm_;
}
// Rt = Rs + Im [exception on overflow]
// This is the full 64 bit version of ADDI. Overflow occurs at 64 bits instead
// of at 32 bits.
void DADDI()
{
s64 result = _add64_Overflow( cpuRegs.GPR.r[_Rs_].SD[0], _Imm_ );
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].SD[0] = result;
}
// Rt = Rs + Im [overflow ignored]
// This instruction is effectively identical to DADDI. It is not a true unsigned operation,
// but rather it is a signed operation that ignores overflows.
void DADDIU()
{
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].UD[0] = cpuRegs.GPR.r[_Rs_].SD[0] + _Imm_;
}
void ANDI() { if (!_Rt_) return; cpuRegs.GPR.r[_Rt_].UD[0] = cpuRegs.GPR.r[_Rs_].UD[0] & (u64)_ImmU_; } // Rt = Rs And Im (zero-extended)
void ORI() { if (!_Rt_) return; cpuRegs.GPR.r[_Rt_].UD[0] = cpuRegs.GPR.r[_Rs_].UD[0] | (u64)_ImmU_; } // Rt = Rs Or Im (zero-extended)
void XORI() { if (!_Rt_) return; cpuRegs.GPR.r[_Rt_].UD[0] = cpuRegs.GPR.r[_Rs_].UD[0] ^ (u64)_ImmU_; } // Rt = Rs Xor Im (zero-extended)
void SLTI() { if (!_Rt_) return; cpuRegs.GPR.r[_Rt_].UD[0] = (cpuRegs.GPR.r[_Rs_].SD[0] < (s64)(_Imm_)) ? 1 : 0; } // Rt = Rs < Im (signed)
void SLTIU() { if (!_Rt_) return; cpuRegs.GPR.r[_Rt_].UD[0] = (cpuRegs.GPR.r[_Rs_].UD[0] < (u64)(_Imm_)) ? 1 : 0; } // Rt = Rs < Im (unsigned)
/*********************************************************
* Register arithmetic *
* Format: OP rd, rs, rt *
*********************************************************/
// Rd = Rs + Rt (Exception on Integer Overflow)
void ADD()
{
s64 result = _add32_Overflow( cpuRegs.GPR.r[_Rs_].SD[0], cpuRegs.GPR.r[_Rt_].SD[0] );
if (!_Rd_) return;
cpuRegs.GPR.r[_Rd_].SD[0] = result;
}
void DADD()
{
s64 result = _add64_Overflow( cpuRegs.GPR.r[_Rs_].SD[0], cpuRegs.GPR.r[_Rt_].SD[0] );
if (!_Rd_) return;
cpuRegs.GPR.r[_Rd_].SD[0] = result;
}
// Rd = Rs - Rt (Exception on Integer Overflow)
void SUB()
{
s64 result = _add32_Overflow( cpuRegs.GPR.r[_Rs_].SD[0], -cpuRegs.GPR.r[_Rt_].SD[0] );
if (!_Rd_) return;
cpuRegs.GPR.r[_Rd_].SD[0] = result;
}
// Rd = Rs - Rt (Exception on Integer Overflow)
void DSUB()
{
s64 result = _add64_Overflow( cpuRegs.GPR.r[_Rs_].SD[0], -cpuRegs.GPR.r[_Rt_].SD[0] );
if (!_Rd_) return;
cpuRegs.GPR.r[_Rd_].SD[0] = result;
}
void ADDU() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.GPR.r[_Rs_].SL[0] + cpuRegs.GPR.r[_Rt_].SL[0];} // Rd = Rs + Rt
void DADDU() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.GPR.r[_Rs_].SD[0] + cpuRegs.GPR.r[_Rt_].SD[0]; }
void SUBU() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.GPR.r[_Rs_].SL[0] - cpuRegs.GPR.r[_Rt_].SL[0]; } // Rd = Rs - Rt
void DSUBU() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.GPR.r[_Rs_].SD[0] - cpuRegs.GPR.r[_Rt_].SD[0]; }
void AND() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.GPR.r[_Rs_].UD[0] & cpuRegs.GPR.r[_Rt_].UD[0]; } // Rd = Rs And Rt
void OR() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.GPR.r[_Rs_].UD[0] | cpuRegs.GPR.r[_Rt_].UD[0]; } // Rd = Rs Or Rt
void XOR() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.GPR.r[_Rs_].UD[0] ^ cpuRegs.GPR.r[_Rt_].UD[0]; } // Rd = Rs Xor Rt
void NOR() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] =~(cpuRegs.GPR.r[_Rs_].UD[0] | cpuRegs.GPR.r[_Rt_].UD[0]); }// Rd = Rs Nor Rt
void SLT() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = (cpuRegs.GPR.r[_Rs_].SD[0] < cpuRegs.GPR.r[_Rt_].SD[0]) ? 1 : 0; } // Rd = Rs < Rt (signed)
void SLTU() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = (cpuRegs.GPR.r[_Rs_].UD[0] < cpuRegs.GPR.r[_Rt_].UD[0]) ? 1 : 0; } // Rd = Rs < Rt (unsigned)
/*********************************************************
* Register mult/div & Register trap logic *
* Format: OP rs, rt *
*********************************************************/
// Signed division "overflows" on (0x80000000 / -1), here (LO = 0x80000000, HI = 0) is returned by MIPS
// in division by zero on MIPS, it appears that:
// LO gets 1 if rs is negative (and the division is signed) and -1 otherwise.
// HI gets the value of rs.
// Result is stored in HI/LO [no arithmetic exceptions]
void DIV()
{
if (cpuRegs.GPR.r[_Rs_].UL[0] == 0x80000000 && cpuRegs.GPR.r[_Rt_].UL[0] == 0xffffffff)
{
cpuRegs.LO.SD[0] = (s32)0x80000000;
cpuRegs.HI.SD[0] = (s32)0x0;
}
else if (cpuRegs.GPR.r[_Rt_].SL[0] != 0)
{
cpuRegs.LO.SD[0] = cpuRegs.GPR.r[_Rs_].SL[0] / cpuRegs.GPR.r[_Rt_].SL[0];
cpuRegs.HI.SD[0] = cpuRegs.GPR.r[_Rs_].SL[0] % cpuRegs.GPR.r[_Rt_].SL[0];
}
else
{
cpuRegs.LO.SD[0] = (cpuRegs.GPR.r[_Rs_].SL[0] < 0) ? 1 : -1;
cpuRegs.HI.SD[0] = cpuRegs.GPR.r[_Rs_].SL[0];
}
}
// Result is stored in HI/LO [no arithmetic exceptions]
void DIVU()
{
if (cpuRegs.GPR.r[_Rt_].UL[0] != 0)
{
// note: DIVU has no sign extension when assigning back to 64 bits
// note 2: reference material strongly disagrees. (air)
cpuRegs.LO.SD[0] = (s32)(cpuRegs.GPR.r[_Rs_].UL[0] / cpuRegs.GPR.r[_Rt_].UL[0]);
cpuRegs.HI.SD[0] = (s32)(cpuRegs.GPR.r[_Rs_].UL[0] % cpuRegs.GPR.r[_Rt_].UL[0]);
}
else
{
cpuRegs.LO.SD[0] = -1;
cpuRegs.HI.SD[0] = cpuRegs.GPR.r[_Rs_].SL[0];
}
}
// Result is written to both HI/LO and to the _Rd_ (Lo only)
void MULT()
{
s64 res = (s64)cpuRegs.GPR.r[_Rs_].SL[0] * cpuRegs.GPR.r[_Rt_].SL[0];
// Sign-extend into 64 bits:
cpuRegs.LO.SD[0] = (s32)(res & 0xffffffff);
cpuRegs.HI.SD[0] = (s32)(res >> 32);
if( _Rd_ ) cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.LO.UD[0];
}
// Result is written to both HI/LO and to the _Rd_ (Lo only)
void MULTU()
{
u64 res = (u64)cpuRegs.GPR.r[_Rs_].UL[0] * cpuRegs.GPR.r[_Rt_].UL[0];
// Note: sign-extend into 64 bits even though it's an unsigned mult.
cpuRegs.LO.SD[0] = (s32)(res & 0xffffffff);
cpuRegs.HI.SD[0] = (s32)(res >> 32);
if( _Rd_ ) cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.LO.UD[0];
}
/*********************************************************
* Load higher 16 bits of the first word in GPR with imm *
* Format: OP rt, immediate *
*********************************************************/
void LUI() {
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].UD[0] = (s32)(cpuRegs.code << 16);
}
/*********************************************************
* Move from HI/LO to GPR *
* Format: OP rd *
*********************************************************/
void MFHI() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.HI.UD[0]; } // Rd = Hi
void MFLO() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.LO.UD[0]; } // Rd = Lo
/*********************************************************
* Move to GPR to HI/LO & Register jump *
* Format: OP rs *
*********************************************************/
void MTHI() { cpuRegs.HI.UD[0] = cpuRegs.GPR.r[_Rs_].UD[0]; } // Hi = Rs
void MTLO() { cpuRegs.LO.UD[0] = cpuRegs.GPR.r[_Rs_].UD[0]; } // Lo = Rs
/*********************************************************
* Shift arithmetic with constant shift *
* Format: OP rd, rt, sa *
*********************************************************/
void SRA() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].SD[0] = (s32)(cpuRegs.GPR.r[_Rt_].SL[0] >> _Sa_); } // Rd = Rt >> sa (arithmetic)
void SRL() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].SD[0] = (s32)(cpuRegs.GPR.r[_Rt_].UL[0] >> _Sa_); } // Rd = Rt >> sa (logical) [sign extend!!]
void SLL() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].SD[0] = (s32)(cpuRegs.GPR.r[_Rt_].UL[0] << _Sa_); } // Rd = Rt << sa
void DSLL() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = (u64)(cpuRegs.GPR.r[_Rt_].UD[0] << _Sa_); }
void DSLL32(){ if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = (u64)(cpuRegs.GPR.r[_Rt_].UD[0] << (_Sa_+32));}
void DSRA() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].SD[0] = cpuRegs.GPR.r[_Rt_].SD[0] >> _Sa_; }
void DSRA32(){ if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].SD[0] = cpuRegs.GPR.r[_Rt_].SD[0] >> (_Sa_+32);}
void DSRL() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.GPR.r[_Rt_].UD[0] >> _Sa_; }
void DSRL32(){ if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.GPR.r[_Rt_].UD[0] >> (_Sa_+32);}
/*********************************************************
* Shift arithmetic with variant register shift *
* Format: OP rd, rt, rs *
*********************************************************/
void SLLV() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].SD[0] = (s32)(cpuRegs.GPR.r[_Rt_].UL[0] << (cpuRegs.GPR.r[_Rs_].UL[0] &0x1f));} // Rd = Rt << rs
void SRAV() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].SD[0] = (s32)(cpuRegs.GPR.r[_Rt_].SL[0] >> (cpuRegs.GPR.r[_Rs_].UL[0] &0x1f));} // Rd = Rt >> rs (arithmetic)
void SRLV() { if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].SD[0] = (s32)(cpuRegs.GPR.r[_Rt_].UL[0] >> (cpuRegs.GPR.r[_Rs_].UL[0] &0x1f));} // Rd = Rt >> rs (logical)
void DSLLV(){ if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = (u64)(cpuRegs.GPR.r[_Rt_].UD[0] << (cpuRegs.GPR.r[_Rs_].UL[0] &0x3f));}
void DSRAV(){ if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].SD[0] = (s64)(cpuRegs.GPR.r[_Rt_].SD[0] >> (cpuRegs.GPR.r[_Rs_].UL[0] &0x3f));}
void DSRLV(){ if (!_Rd_) return; cpuRegs.GPR.r[_Rd_].UD[0] = (u64)(cpuRegs.GPR.r[_Rt_].UD[0] >> (cpuRegs.GPR.r[_Rs_].UL[0] &0x3f));}
/*********************************************************
* Load and store for GPR *
* Format: OP rt, offset(base) *
*********************************************************/
// Implementation Notes Regarding Memory Operations:
// * It it 'correct' to do all loads into temp variables, even if the destination GPR
// is the zero reg (which nullifies the result). The memory needs to be accessed
// regardless so that hardware registers behave as expected (some clear on read) and
// so that TLB Misses are handled as expected as well.
//
// * Low/High varieties of instructions, such as LWL/LWH, do *not* raise Address Error
// exceptions, since the lower bits of the address are used to determine the portions
// of the address/register operations.
void LB()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
s8 temp = memRead8(addr);
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].SD[0] = temp;
}
void LBU()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
u8 temp = memRead8(addr);
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].UD[0] = temp;
}
void LH()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
if( addr & 1 )
throw R5900Exception::AddressError( addr, false );
s16 temp = memRead16(addr);
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].SD[0] = temp;
}
void LHU()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
if( addr & 1 )
throw R5900Exception::AddressError( addr, false );
u16 temp = memRead16(addr);
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].UD[0] = temp;
}
void LW()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
if( addr & 3 )
throw R5900Exception::AddressError( addr, false );
u32 temp = memRead32(addr);
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].SD[0] = (s32)temp;
}
void LWU()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
if( addr & 3 )
throw R5900Exception::AddressError( addr, false );
u32 temp = memRead32(addr);
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].UD[0] = temp;
}
static const s32 LWL_MASK[4] = { 0xffffff, 0x0000ffff, 0x000000ff, 0x00000000 };
static const s32 LWR_MASK[4] = { 0x000000, 0xff000000, 0xffff0000, 0xffffff00 };
static const u8 LWL_SHIFT[4] = { 24, 16, 8, 0 };
static const u8 LWR_SHIFT[4] = { 0, 8, 16, 24 };
void LWL()
{
s32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
u32 shift = addr & 3;
// ensure the compiler does correct sign extension into 64 bits by using s32
s32 mem = memRead32(addr & ~3);
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].SD[0] = (cpuRegs.GPR.r[_Rt_].SL[0] & LWL_MASK[shift]) |
(mem << LWL_SHIFT[shift]);
/*
Mem = 1234. Reg = abcd
(result is always sign extended into the upper 32 bits of the Rt)
0 4bcd (mem << 24) | (reg & 0x00ffffff)
1 34cd (mem << 16) | (reg & 0x0000ffff)
2 234d (mem << 8) | (reg & 0x000000ff)
3 1234 (mem ) | (reg & 0x00000000)
*/
}
void LWR()
{
s32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
u32 shift = addr & 3;
u32 mem = memRead32(addr & ~3);
if (!_Rt_) return;
// Use unsigned math here, and conditionally sign extend below, when needed.
mem = (cpuRegs.GPR.r[_Rt_].UL[0] & LWR_MASK[shift]) | (mem >> LWR_SHIFT[shift]);
if( shift == 0 )
{
// This special case requires sign extension into the full 64 bit dest.
cpuRegs.GPR.r[_Rt_].SD[0] = (s32)mem;
}
else
{
// This case sets the lower 32 bits of the target register. Upper
// 32 bits are always preserved.
cpuRegs.GPR.r[_Rt_].UL[0] = mem;
}
/*
Mem = 1234. Reg = abcd
0 1234 (mem ) | (reg & 0x00000000) [sign extend into upper 32 bits!]
1 a123 (mem >> 8) | (reg & 0xff000000)
2 ab12 (mem >> 16) | (reg & 0xffff0000)
3 abc1 (mem >> 24) | (reg & 0xffffff00)
*/
}
// dummy variable used as a destination address for writes to the zero register, so
// that the zero register always stays zero.
static __aligned16 GPR_reg m_dummy_gpr_zero;
// Returns the x86 address of the requested GPR, which is safe for writing. (includes
// special handling for returning a dummy var for GPR0(zero), so that it's value is
// always preserved)
static u64* gpr_GetWritePtr( uint gpr )
{
return (u64*)(( gpr == 0 ) ? &m_dummy_gpr_zero : &cpuRegs.GPR.r[gpr]);
}
void LD()
{
s32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
if( addr & 7 )
throw R5900Exception::AddressError( addr, false );
memRead64(addr, gpr_GetWritePtr(_Rt_));
}
static const u64 LDL_MASK[8] =
{ 0x00ffffffffffffffLL, 0x0000ffffffffffffLL, 0x000000ffffffffffLL, 0x00000000ffffffffLL,
0x0000000000ffffffLL, 0x000000000000ffffLL, 0x00000000000000ffLL, 0x0000000000000000LL
};
static const u64 LDR_MASK[8] =
{ 0x0000000000000000LL, 0xff00000000000000LL, 0xffff000000000000LL, 0xffffff0000000000LL,
0xffffffff00000000LL, 0xffffffffff000000LL, 0xffffffffffff0000LL, 0xffffffffffffff00LL
};
static const u8 LDR_SHIFT[8] = { 0, 8, 16, 24, 32, 40, 48, 56 };
static const u8 LDL_SHIFT[8] = { 56, 48, 40, 32, 24, 16, 8, 0 };
void LDL()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
u32 shift = addr & 7;
u64 mem;
memRead64(addr & ~7, &mem);
if( !_Rt_ ) return;
cpuRegs.GPR.r[_Rt_].UD[0] = (cpuRegs.GPR.r[_Rt_].UD[0] & LDL_MASK[shift]) |
(mem << LDL_SHIFT[shift]);
}
void LDR()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
u32 shift = addr & 7;
u64 mem;
memRead64(addr & ~7, &mem);
if (!_Rt_) return;
cpuRegs.GPR.r[_Rt_].UD[0] = (cpuRegs.GPR.r[_Rt_].UD[0] & LDR_MASK[shift]) |
(mem >> LDR_SHIFT[shift]);
}
void LQ()
{
// MIPS Note: LQ and SQ are special and "silently" align memory addresses, thus
// an address error due to unaligned access isn't possible like it is on other loads/stores.
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
memRead128(addr & ~0xf, gpr_GetWritePtr(_Rt_));
}
void SB()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
memWrite8(addr, cpuRegs.GPR.r[_Rt_].UC[0]);
}
void SH()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
if( addr & 1 )
throw R5900Exception::AddressError( addr, true );
memWrite16(addr, cpuRegs.GPR.r[_Rt_].US[0]);
}
void SW()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
if( addr & 3 )
throw R5900Exception::AddressError( addr, true );
memWrite32(addr, cpuRegs.GPR.r[_Rt_].UL[0]);
}
static const u32 SWL_MASK[4] = { 0xffffff00, 0xffff0000, 0xff000000, 0x00000000 };
static const u32 SWR_MASK[4] = { 0x00000000, 0x000000ff, 0x0000ffff, 0x00ffffff };
static const u8 SWR_SHIFT[4] = { 0, 8, 16, 24 };
static const u8 SWL_SHIFT[4] = { 24, 16, 8, 0 };
void SWL()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
u32 shift = addr & 3;
u32 mem = memRead32( addr & ~3 );
memWrite32( addr & ~3,
(cpuRegs.GPR.r[_Rt_].UL[0] >> 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)
*/
}
void SWR() {
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
u32 shift = addr & 3;
u32 mem = memRead32(addr & ~3);
memWrite32( addr & ~3,
(cpuRegs.GPR.r[_Rt_].UL[0] << 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)
*/
}
void SD()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
if( addr & 7 )
throw R5900Exception::AddressError( addr, true );
memWrite64(addr,&cpuRegs.GPR.r[_Rt_].UD[0]);
}
static const u64 SDL_MASK[8] =
{ 0xffffffffffffff00LL, 0xffffffffffff0000LL, 0xffffffffff000000LL, 0xffffffff00000000LL,
0xffffff0000000000LL, 0xffff000000000000LL, 0xff00000000000000LL, 0x0000000000000000LL
};
static const u64 SDR_MASK[8] =
{ 0x0000000000000000LL, 0x00000000000000ffLL, 0x000000000000ffffLL, 0x0000000000ffffffLL,
0x00000000ffffffffLL, 0x000000ffffffffffLL, 0x0000ffffffffffffLL, 0x00ffffffffffffffLL
};
static const u8 SDL_SHIFT[8] = { 56, 48, 40, 32, 24, 16, 8, 0 };
static const u8 SDR_SHIFT[8] = { 0, 8, 16, 24, 32, 40, 48, 56 };
void SDL()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
u32 shift = addr & 7;
u64 mem;
memRead64(addr & ~7, &mem);
mem = (cpuRegs.GPR.r[_Rt_].UD[0] >> SDL_SHIFT[shift]) |
(mem & SDL_MASK[shift]);
memWrite64(addr & ~7, &mem);
}
void SDR()
{
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
u32 shift = addr & 7;
u64 mem;
memRead64(addr & ~7, &mem);
mem = (cpuRegs.GPR.r[_Rt_].UD[0] << SDR_SHIFT[shift]) |
(mem & SDR_MASK[shift]);
memWrite64(addr & ~7, &mem );
}
void SQ()
{
// MIPS Note: LQ and SQ are special and "silently" align memory addresses, thus
// an address error due to unaligned access isn't possible like it is on other loads/stores.
u32 addr = cpuRegs.GPR.r[_Rs_].UL[0] + _Imm_;
memWrite128(addr & ~0xf, &cpuRegs.GPR.r[_Rt_].UD[0]);
}
/*********************************************************
* Conditional Move *
* Format: OP rd, rs, rt *
*********************************************************/
void MOVZ() {
if (!_Rd_) return;
if (cpuRegs.GPR.r[_Rt_].UD[0] == 0) {
cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.GPR.r[_Rs_].UD[0];
}
}
void MOVN() {
if (!_Rd_) return;
if (cpuRegs.GPR.r[_Rt_].UD[0] != 0) {
cpuRegs.GPR.r[_Rd_].UD[0] = cpuRegs.GPR.r[_Rs_].UD[0];
}
}
/*********************************************************
* Special purpose instructions *
* Format: OP *
*********************************************************/
#include "Sifcmd.h"
/*
int __Deci2Call(int call, u32 *addr);
*/
u32 *deci2addr = NULL;
u32 deci2handler;
char deci2buffer[256];
/*
* int Deci2Call(int, u_int *);
*
* HLE implementation of the Deci2 interface.
*/
int __Deci2Call(int call, u32 *addr)
{
if (call > 0x10)
return -1;
switch (call)
{
case 1: // open
if( addr != NULL )
{
deci2addr = (u32*)PSM(addr[1]);
BIOS_LOG("deci2open: %x,%x,%x,%x",
addr[3], addr[2], addr[1], addr[0]);
deci2handler = addr[2];
}
else
{
deci2handler = NULL;
DevCon.Warning( "Deci2Call.Open > NULL address ignored." );
}
return 1;
case 2: // close
return 1;
case 3: // reqsend
{
char reqaddr[128];
if( addr != NULL )
sprintf( reqaddr, "%x %x %x %x", addr[3], addr[2], addr[1], addr[0] );
BIOS_LOG("deci2reqsend: %s: deci2addr: %x,%x,%x,buf=%x %x,%x,len=%x,%x",
(( addr == NULL ) ? "NULL" : reqaddr),
deci2addr[7], deci2addr[6], deci2addr[5], deci2addr[4],
deci2addr[3], deci2addr[2], deci2addr[1], deci2addr[0]);
// cpuRegs.pc = deci2handler;
// Console.WriteLn("deci2msg: %s", (char*)PSM(deci2addr[4]+0xc));
if (deci2addr == NULL) return 1;
if (deci2addr[1]>0xc){
u8* pdeciaddr = (u8*)dmaGetAddr(deci2addr[4]+0xc);
if( pdeciaddr == NULL )
pdeciaddr = (u8*)PSM(deci2addr[4]+0xc);
else
pdeciaddr += (deci2addr[4]+0xc) % 16;
memcpy(deci2buffer, pdeciaddr, deci2addr[1]-0xc);
deci2buffer[(deci2addr[1]-0xc>=255) ? 255 : (deci2addr[1]-0xc)] = '\0';
if( EmuConfig.Log.Deci2 )
Console.Write( ConColor_EE, L"%s", ShiftJIS_ConvertString(deci2buffer).c_str() );
}
deci2addr[3] = 0;
return 1;
}
case 4: // poll
if( addr != NULL )
BIOS_LOG("deci2poll: %x,%x,%x,%x\n", addr[3], addr[2], addr[1], addr[0]);
return 1;
case 5: // exrecv
return 1;
case 6: // exsend
return 1;
case 0x10://kputs
if( addr != NULL && EmuConfig.Log.Deci2 )
Console.Write( ConColor_EE, L"%s", ShiftJIS_ConvertString((char*)PSM(*addr)).c_str() );
return 1;
}
return 0;
}
void SYSCALL()
{
u8 call;
if (cpuRegs.GPR.n.v1.SL[0] < 0)
call = (u8)(-cpuRegs.GPR.n.v1.SL[0]);
else
call = cpuRegs.GPR.n.v1.UC[0];
BIOS_LOG("Bios call: %s (%x)", bios[call], call);
if (call == 0x7c)
{
if(cpuRegs.GPR.n.a0.UL[0] == 0x10)
Console.Write( ConColor_EE, L"%s", ShiftJIS_ConvertString((char*)PSM(memRead32(cpuRegs.GPR.n.a1.UL[0]))).c_str() );
else
__Deci2Call( cpuRegs.GPR.n.a0.UL[0], (u32*)PSM(cpuRegs.GPR.n.a1.UL[0]) );
}
if (call == 0x77)
{
t_sif_dma_transfer *dmat;
//struct t_sif_cmd_header *hdr;
//struct t_sif_rpc_bind *bind;
//struct t_rpc_server_data *server;
int n_transfer;
u32 addr;
//int sid;
n_transfer = cpuRegs.GPR.n.a1.UL[0] - 1;
if (n_transfer >= 0)
{
addr = cpuRegs.GPR.n.a0.UL[0] + n_transfer * sizeof(t_sif_dma_transfer);
dmat = (t_sif_dma_transfer*)PSM(addr);
BIOS_LOG("bios_%s: n_transfer=%d, size=%x, attr=%x, dest=%x, src=%x",
bios[cpuRegs.GPR.n.v1.UC[0]], n_transfer,
dmat->size, dmat->attr,
dmat->dest, dmat->src);
}
}
cpuRegs.pc -= 4;
cpuException(0x20, cpuRegs.branch);
}
void BREAK(void) {
cpuRegs.pc -= 4;
cpuException(0x24, cpuRegs.branch);
}
void MFSA( void ) {
if (!_Rd_) return;
cpuRegs.GPR.r[_Rd_].SD[0] = (s64)cpuRegs.sa;
}
void MTSA( void ) {
cpuRegs.sa = (s32)cpuRegs.GPR.r[_Rs_].SD[0] & 0xf;
}
// SNY supports three basic modes, two which synchronize memory accesses (related
// to the cache) and one which synchronizes the instruction pipeline (effectively
// a stall in either case). Our emulation model does not track EE-side pipeline
// status or stalls, nor does it implement the CACHE. Thus SYNC need do nothing.
void SYNC( void )
{
}
// Used to prefetch data into the EE's cache, or schedule a dirty write-back.
// CACHE is not emulated at this time (nor is there any need to emulate it), so
// this function does nothing in the context of our emulator.
void PREF( void )
{
}
/*********************************************************
* Register trap *
* Format: OP rs, rt *
*********************************************************/
void TGE() { if (cpuRegs.GPR.r[_Rs_].SD[0] >= cpuRegs.GPR.r[_Rt_].SD[0]) throw R5900Exception::Trap(_TrapCode_); }
void TGEU() { if (cpuRegs.GPR.r[_Rs_].UD[0] >= cpuRegs.GPR.r[_Rt_].UD[0]) throw R5900Exception::Trap(_TrapCode_); }
void TLT() { if (cpuRegs.GPR.r[_Rs_].SD[0] < cpuRegs.GPR.r[_Rt_].SD[0]) throw R5900Exception::Trap(_TrapCode_); }
void TLTU() { if (cpuRegs.GPR.r[_Rs_].UD[0] < cpuRegs.GPR.r[_Rt_].UD[0]) throw R5900Exception::Trap(_TrapCode_); }
void TEQ() { if (cpuRegs.GPR.r[_Rs_].SD[0] == cpuRegs.GPR.r[_Rt_].SD[0]) throw R5900Exception::Trap(_TrapCode_); }
void TNE() { if (cpuRegs.GPR.r[_Rs_].SD[0] != cpuRegs.GPR.r[_Rt_].SD[0]) throw R5900Exception::Trap(_TrapCode_); }
/*********************************************************
* Trap with immediate operand *
* Format: OP rs, rt *
*********************************************************/
void TGEI() { if (cpuRegs.GPR.r[_Rs_].SD[0] >= _Imm_) throw R5900Exception::Trap(); }
void TLTI() { if (cpuRegs.GPR.r[_Rs_].SD[0] < _Imm_) throw R5900Exception::Trap(); }
void TEQI() { if (cpuRegs.GPR.r[_Rs_].SD[0] == _Imm_) throw R5900Exception::Trap(); }
void TNEI() { if (cpuRegs.GPR.r[_Rs_].SD[0] != _Imm_) throw R5900Exception::Trap(); }
void TGEIU() { if (cpuRegs.GPR.r[_Rs_].UD[0] >= (u64)_Imm_) throw R5900Exception::Trap(); }
void TLTIU() { if (cpuRegs.GPR.r[_Rs_].UD[0] < (u64)_Imm_) throw R5900Exception::Trap(); }
/*********************************************************
* Sa intructions *
* Format: OP rs, rt *
*********************************************************/
void MTSAB() {
cpuRegs.sa = ((cpuRegs.GPR.r[_Rs_].UL[0] & 0xF) ^ (_Imm_ & 0xF));
}
void MTSAH() {
cpuRegs.sa = ((cpuRegs.GPR.r[_Rs_].UL[0] & 0x7) ^ (_Imm_ & 0x7)) << 1;
}
} } } // end namespace R5900::Interpreter::OpcodeImpl
Reference in New Issue View Git Blame Copy Permalink