private void Inst_Lwc1(MipsInstruction inst)
{
if (!CheckCop1Usable())
{
CauseException = ExceptionCode.CopUnstable;
return;
}
if (!CheckEvenOddAllowed(inst.Ft))
{
CauseFPUException(FPUExceptionType.Unimplemented);
return;
}
Int64 address = ComputeAddress(inst);
UInt32 value = DataManipulator.LoadWordUnsigned(address);
if (MipsState.CP0Regs.StatusReg.AdditionalFPR)
{
MipsState.Fpr.WriteFPRUnsigned(inst.Ft, value);
}
else
{
MipsState.Fpr.WriteFPR32Unsigned(inst.Ft, value);
}
}
private void Inst_Swr(MipsInstruction inst)
{
/* Thanks to PJ64 */
Int64 address = ComputeAddress(inst);
Int32 offset = (Int32)(address & 3);
UInt32 value = DataManipulator.LoadWordUnsigned(address & ~3);
value &= SWRMask[offset];
value += MipsState.ReadGPR32Unsigned(inst.Rt) << SWRShift[offset];
DataManipulator.Store(address & ~3, value);
}
private void Inst_Lwu(MipsInstruction inst)
{
if (!MipsState.Operating64BitMode)
{
CauseException = ExceptionCode.ReservedInstruction;
return;
}
Int64 address = ComputeAddress(inst);
if ((address & 3) != 0)
{
CauseException = ExceptionCode.AddressErrorLoad;
}
else
{
MipsState.WriteGPRUnsigned(inst.Rt, DataManipulator.LoadWordUnsigned(address));
}
}
