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Merge pull request #6484 from lioncash/mul 

Interpreter_Integer: Handle the overflow flag when the OE bit is set for mullw
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Anthony 2018-03-21 18:18:00 -07:00 committed by GitHub
parent 716e4ba035 355509653e
commit 23bc50704a
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 6 deletions
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13
Source/Core/Core/PowerPC/Interpreter/Interpreter_Integer.cpp
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@ -566,13 +566,14 @@ void Interpreter::mulhwux(UGeckoInstruction inst)
void Interpreter::mullwx(UGeckoInstruction inst)
{
u32 a = rGPR[inst.RA];
u32 b = rGPR[inst.RB];
u32 d = (u32)((s32)a * (s32)b);
rGPR[inst.RD] = d;
const s64 a = static_cast<s32>(rGPR[inst.RA]);
const s64 b = static_cast<s32>(rGPR[inst.RB]);
const s64 result = a * b;
if (inst.OE)
PanicAlert("OE: mullwx");
rGPR[inst.RD] = static_cast<u32>(result);
if (inst.OE && (result < -0x80000000LL || result > 0x7FFFFFFFLL))
SetXER_OV(true);
if (inst.Rc)
Helper_UpdateCR0(rGPR[inst.RD]);