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Added an exception check when the game is close to overflowing. Fixes the fifo overflow that occurs in Battalion Wars 2.

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Changed the CPEnd loop check to an exact match.
This commit is contained in:
skidau
2014-11-17 16:05:16 +11:00
parent 3d448e49c6
commit ca3e5ce5e1
1 changed files with 6 additions and 3 deletions
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9
Source/Core/VideoCommon/CommandProcessor.cpp
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@ -330,7 +330,7 @@ void GatherPipeBursted()
}
// update the fifo pointer
if (fifo.CPWritePointer >= fifo.CPEnd)
if (fifo.CPWritePointer == fifo.CPEnd)
fifo.CPWritePointer = fifo.CPBase;
else
fifo.CPWritePointer += GATHER_PIPE_SIZE;
@ -342,6 +342,10 @@ void GatherPipeBursted()
ProcessorInterface::Fifo_CPUEnd = fifo.CPEnd;
}
// If the game is running close to overflowing, make the exception checking more frequent.
if (fifo.bFF_HiWatermark)
CoreTiming::ForceExceptionCheck(0);
Common::AtomicAdd(fifo.CPReadWriteDistance, GATHER_PIPE_SIZE);
RunGpu();
@ -470,8 +474,7 @@ void ProcessFifoAllDistance()
{
if (IsOnThread())
{
while (!interruptWaiting && fifo.bFF_GPReadEnable &&
fifo.CPReadWriteDistance && !AtBreakpoint())
while (!interruptWaiting && fifo.bFF_GPReadEnable && fifo.CPReadWriteDistance && !AtBreakpoint())
Common::YieldCPU();
}
}