private void Inst_Ldc1(MipsInstruction inst)
{
if (!CheckCop1Usable())
{
CauseException = ExceptionCode.CopUnstable;
return;
}
if (!CheckEvenOddAllowed(inst.Ft))
{
CauseFPUException(FPUExceptionType.Unimplemented);
return;
}
Int64 address = ComputeAddress(inst);
UInt64 value = DataManipulator.LoadDoublewordUnsigned(address);
if (MipsState.CP0Regs.StatusReg.AdditionalFPR)
{
MipsState.Fpr.WriteFPRUnsigned(inst.Ft, value);
}
else
{
MipsState.Fpr.WriteFPR32Unsigned(inst.Ft + 1, (UInt32)(value >> 32));
MipsState.Fpr.WriteFPR32Unsigned(inst.Ft, (UInt32)(value & 0xFFFFFFFF));
}
}
private void Inst_Ldr(MipsInstruction inst)
{
if (MipsState.Operating64BitMode)
{
/* Thanks to PJ64 Implementation */
Int64 address = ComputeAddress(inst);
Int32 offset = (Int32)(address & 7);
UInt64 value = DataManipulator.LoadDoublewordUnsigned(address & ~7);
MipsState.WriteGPRUnsigned(inst.Rt, MipsState.ReadGPRUnsigned(inst.Rt) & LDRMask[offset]);
MipsState.WriteGPRUnsigned(inst.Rt, MipsState.ReadGPRUnsigned(inst.Rt) + (value >> LDRShift[offset]));
}
else
{
CauseException = ExceptionCode.ReservedInstruction;
}
}
private void Inst_Sdr(MipsInstruction inst)
{
if (MipsState.Operating64BitMode)
{
/* Thanks to PJ64 implementation */
Int64 address = ComputeAddress(inst);
Int32 offset = (Int32)(address & 7);
UInt64 value = DataManipulator.LoadDoublewordUnsigned(address & ~7);
value &= SDRMask[offset];
value += MipsState.ReadGPRUnsigned(inst.Rt) << SDLShift[offset];
DataManipulator.Store(address & ~7, value);
}
else
{
CauseException = ExceptionCode.ReservedInstruction;
}
}
private void Inst_Ld(MipsInstruction inst)
{
if (!MipsState.Operating64BitMode)
{
CauseException = ExceptionCode.ReservedInstruction;
}
else
{
Int64 address = ComputeAddress(inst);
if ((address & 3) != 0)
{
CauseException = ExceptionCode.AddressErrorLoad;
}
else
{
MipsState.WriteGPRUnsigned(inst.Rt, DataManipulator.LoadDoublewordUnsigned(address));
}
}
}
