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Merge pull request #7045 from lioncash/fres

Interpreter_FloatingPoint: Don't store to destination in fres if VE or ZE is set and a relevant exception occurs
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Helios747 committed Jun 2, 2018
2 parents c02a239 + 179d73a commit 8d1b2f9cae68283ab36a6492ad1593691dabbd29
Showing with 10 additions and 5 deletions.
  1. +10 −5 Source/Core/Core/PowerPC/Interpreter/Interpreter_FloatingPoint.cpp
@@ -387,27 +387,32 @@ void Interpreter::fdivsx(UGeckoInstruction inst)
void Interpreter::fresx(UGeckoInstruction inst)
{
const double b = rPS0(inst.FB);
const double result = Common::ApproximateReciprocal(b);
rPS0(inst.FD) = rPS1(inst.FD) = result;
const auto compute_result = [inst](double value) {
const double result = Common::ApproximateReciprocal(value);
rPS0(inst.FD) = rPS1(inst.FD) = result;
PowerPC::UpdateFPRF(result);
};
if (b == 0.0)
{
SetFPException(FPSCR_ZX);
if (FPSCR.ZE == 0)
PowerPC::UpdateFPRF(result);
compute_result(b);
}
else if (Common::IsSNAN(b))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.FI = 0;
FPSCR.FR = 0;
if (FPSCR.VE == 0)
PowerPC::UpdateFPRF(result);
compute_result(b);
}
else
{
PowerPC::UpdateFPRF(result);
compute_result(b);
}
if (inst.Rc)

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