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SI_DeviceGCController: Remedy undefined behavior regarding shifts

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Left shifting a negative left-hand operand is undefined behavior per section 5.8.2 of the C++11 standard.
This commit is contained in:
Lioncash
2015-07-09 13:08:37 -04:00
parent 95fed00cbb
commit 6e90d1e433
1 changed files with 5 additions and 1 deletions
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6
Source/Core/Core/HW/SI_DeviceGCController.h
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@ -118,7 +118,11 @@ public:
virtual bool GetData(u32& _Hi, u32& _Low) override virtual bool GetData(u32& _Hi, u32& _Low) override
{ {
CSIDevice_GCController::GetData(_Hi, _Low); CSIDevice_GCController::GetData(_Hi, _Low);
_Hi &= ~PAD_USE_ORIGIN << 16;
// Unset all bits except those that represent
// A, B, X, Y, Start and the error bits, as they
// are not used.
_Hi &= ~0x20FFFFFF;
return true; return true;
} }
}; };