121 lines
3.9 KiB
C++
121 lines
3.9 KiB
C++
#include "..\..\N64 System.h"
|
|
|
|
QWORD const COpcode::LDL_MASK[8] = { 0x0000000000000000,0x00000000000000FF,0x000000000000FFFF,
|
|
0x0000000000FFFFFF,0x00000000FFFFFFFF,0x000000FFFFFFFFFF,
|
|
0x0000FFFFFFFFFFFF,0x00FFFFFFFFFFFFFF };
|
|
QWORD const COpcode::LDR_MASK[8] = { 0xFFFFFFFFFFFFFF00,0xFFFFFFFFFFFF0000,0xFFFFFFFFFF000000,
|
|
0xFFFFFFFF00000000,0xFFFFFF0000000000,0xFFFF000000000000,
|
|
0xFF00000000000000,0x0000000000000000 };
|
|
QWORD const COpcode::SDL_MASK[8] = { 0x0000000000000000,0xFF00000000000000,0xFFFF000000000000,
|
|
0xFFFFFF0000000000,0xFFFFFFFF00000000,0xFFFFFFFFFF000000,
|
|
0xFFFFFFFFFFFF0000,0xFFFFFFFFFFFFFF00 };
|
|
QWORD const COpcode::SDR_MASK[8] = { 0x00FFFFFFFFFFFFFF,0x0000FFFFFFFFFFFF,0x000000FFFFFFFFFF,
|
|
0x00000000FFFFFFFF,0x0000000000FFFFFF,0x000000000000FFFF,
|
|
0x00000000000000FF,0x0000000000000000 };
|
|
int const COpcode::DL_SHIFT[8] = { 0, 8, 16, 24, 32, 40, 48, 56 };
|
|
int const COpcode::DR_SHIFT[8] = { 56,48,40, 32, 24, 16, 8, 0 };
|
|
|
|
DWORD const COpcode::LWL_MASK[4] = { 0x00000000,0x000000FF,0x0000FFFF,0x00FFFFFF };
|
|
DWORD const COpcode::LWR_MASK[4] = { 0xFFFFFF00,0xFFFF0000,0xFF000000,0x00000000 };
|
|
DWORD const COpcode::SWL_MASK[4] = { 0x00000000,0xFF000000,0xFFFF0000,0xFFFFFF00 };
|
|
DWORD const COpcode::SWR_MASK[4] = { 0x00FFFFFF,0x0000FFFF,0x000000FF,0x00000000 };
|
|
int const COpcode::WL_SHIFT[4] = { 0, 8, 16, 24 };
|
|
int const COpcode::WR_SHIFT[4] = { 24, 16 , 8, 0 };
|
|
|
|
COpcode::COpcode ( CMipsMemory * MMU, DWORD VirtualAddress ):
|
|
COpcodeAnalysis(MMU,m_opcode),
|
|
_MMU(MMU),
|
|
_Reg(MMU->SystemRegisters()),
|
|
m_OpLen(OpCode_Size),
|
|
m_OpcodeCount(_Settings->LoadDword(Game_CounterFactor)),
|
|
m_FixedOpcodeCount(_Settings->LoadDword(Game_CounterFactor) != 0)
|
|
{
|
|
//setup details about handling opcodes
|
|
m_NextStep = StepNormal;
|
|
m_JumpLocation = -1;
|
|
|
|
//Flags
|
|
m_FlagSet = false;
|
|
m_ExectionJumped = false;
|
|
m_InPermLoop = PermLoop_None;
|
|
|
|
//set up the details about the current opcode
|
|
m_opcode.VirtualAddress = VirtualAddress & ~3;
|
|
if (!SetPC(m_opcode.VirtualAddress)) {
|
|
Notify().BreakPoint(__FILE__,__LINE__);
|
|
}
|
|
}
|
|
|
|
float COpcode::CycleCount ( void ) {
|
|
if (m_FixedOpcodeCount) {
|
|
return m_OpcodeCount;
|
|
}
|
|
return 2;
|
|
}
|
|
|
|
bool COpcode::Next (void) {
|
|
m_ExectionJumped = false;
|
|
|
|
switch (m_NextStep) {
|
|
case StepNormal:
|
|
m_opcode.VirtualAddress += m_OpLen;
|
|
break;
|
|
case StepDelaySlot:
|
|
m_NextStep = StepJump;
|
|
m_opcode.VirtualAddress += m_OpLen;
|
|
break;
|
|
case StepJump:
|
|
m_opcode.VirtualAddress = m_JumpLocation;
|
|
m_NextStep = StepNormal;
|
|
m_FlagSet = true;
|
|
m_ExectionJumped = true;
|
|
break;
|
|
//Compiler flags
|
|
case DoDelaySlot:
|
|
m_NextStep = InsideDelaySlot;
|
|
m_opcode.VirtualAddress += m_OpLen;
|
|
break;
|
|
case InsideDelaySlot:
|
|
m_NextStep = DelaySlotDone;
|
|
m_opcode.VirtualAddress -= m_OpLen;
|
|
break;
|
|
case DelaySlotDone:
|
|
m_NextStep = BranchCompiled;
|
|
m_opcode.VirtualAddress += m_OpLen * 2;
|
|
break;
|
|
default:
|
|
m_opcode.VirtualAddress += m_OpLen;
|
|
Notify().BreakPoint(__FILE__,__LINE__);
|
|
}
|
|
|
|
if (!_MMU->Load32(m_opcode.VirtualAddress,m_opcode.Hex,_32Bit,false)) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void COpcode::SetJump ( DWORD Target, bool Delay ) {
|
|
if (Target == PC()) {
|
|
if (_MMU->ValidVaddr(Target + OpCode_Size)) {
|
|
if (HasDelaySlot() && !DelaySlotEffectsJump()) {
|
|
m_InPermLoop = PermLoop_Jump;
|
|
m_FlagSet = true;
|
|
}
|
|
}
|
|
}
|
|
m_NextStep = Delay ? StepDelaySlot : StepJump;
|
|
m_JumpLocation = Target;
|
|
}
|
|
|
|
bool COpcode::SetPC ( DWORD VirtualAddress ) {
|
|
PERM_LOOP InPerm = m_InPermLoop;
|
|
bool FlagSet = m_FlagSet;
|
|
m_opcode.VirtualAddress = -1;
|
|
SetJump(VirtualAddress,false);
|
|
bool Result = Next();
|
|
m_InPermLoop = InPerm;
|
|
m_FlagSet = FlagSet;
|
|
return Result;
|
|
}
|
|
|