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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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Anthony 2018-06-02 11:42:34 -07:00 committed by GitHub
parent c02a239a2f 179d73ac0d
commit 8d1b2f9cae
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 10 additions and 5 deletions
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15
Source/Core/Core/PowerPC/Interpreter/Interpreter_FloatingPoint.cpp
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@ -387,27 +387,32 @@ void Interpreter::fdivsx(UGeckoInstruction inst)
void Interpreter::fresx(UGeckoInstruction inst) void Interpreter::fresx(UGeckoInstruction inst)
{ {
const double b = rPS0(inst.FB); 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) if (b == 0.0)
{ {
SetFPException(FPSCR_ZX); SetFPException(FPSCR_ZX);
if (FPSCR.ZE == 0) if (FPSCR.ZE == 0)
PowerPC::UpdateFPRF(result); compute_result(b);
} }
else if (Common::IsSNAN(b)) else if (Common::IsSNAN(b))
{ {
SetFPException(FPSCR_VXSNAN); SetFPException(FPSCR_VXSNAN);
FPSCR.FI = 0;
FPSCR.FR = 0;
if (FPSCR.VE == 0) if (FPSCR.VE == 0)
PowerPC::UpdateFPRF(result); compute_result(b);
} }
else else
{ {
PowerPC::UpdateFPRF(result); compute_result(b);
} }
if (inst.Rc) if (inst.Rc)