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Simplify fifo code

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3855 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
Nolan Check 2009-07-20 01:10:00 +00:00
parent feb67740bc
commit 5b6b732378
2 changed files with 24 additions and 43 deletions
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5
Source/Core/Core/Src/HW/CommandProcessor.cpp
View File

@ -422,6 +422,11 @@ void Write16(const u16 _Value, const u32 _Address)
Common::AtomicStore(fifo.bFF_GPLinkEnable, tmpCtrl.GPLinkEnable);
Common::AtomicStore(fifo.bFF_BPEnable, tmpCtrl.BPEnable);
if (m_CPCtrlReg.BPEnable && !tmpCtrl.BPEnable)
{
fifo.bFF_Breakpoint = 0;
}
// TOCHECK (mb2): could BP irq be cleared with w16 to STATUS_REGISTER?
// funny hack: eg in MP1 if we disable the clear breakpoint ability by commenting this block
// the game is of course faster but looks stable too.

62
Source/Core/VideoCommon/Src/Fifo.cpp
View File

@ -122,15 +122,9 @@ void Fifo_EnterLoop(const SVideoInitialize &video_initialize)
{
fifoStateRun = true;
SCPFifoStruct &_fifo = *video_initialize.pCPFifo;
s32 distToSend;
while (fifoStateRun)
{
video_initialize.pPeekMessages();
VideoFifo_CheckEFBAccess();
VideoFifo_CheckSwapRequest();
s_criticalFifo.Enter();
@ -139,56 +133,35 @@ void Fifo_EnterLoop(const SVideoInitialize &video_initialize)
{
Common::AtomicStore(_fifo.CPReadIdle, 0);
while (_fifo.bFF_GPReadEnable && _fifo.CPReadWriteDistance)
do
{
if(!fifoStateRun)
break;
// Create pointer to video data and send it to the VideoPlugin
u32 readPtr = _fifo.CPReadPointer;
u8 *uData = video_initialize.pGetMemoryPointer(readPtr);
// if we are on BP mode we must send 32B chunks to Video plugin for BP checking
// TODO (mb2): test & check if MP1/MP2 realy need this now.
if (_fifo.bFF_BPEnable)
{
if (readPtr == _fifo.CPBreakpoint)
{
Common::AtomicStore(_fifo.bFF_Breakpoint, 1);
video_initialize.pUpdateInterrupts();
break;
}
distToSend = 32;
readPtr += 32;
if ( readPtr >= _fifo.CPEnd)
readPtr = _fifo.CPBase;
}
else
{
distToSend = _fifo.CPReadWriteDistance;
// send 1024B chunk max length to have better control over PeekMessages' period
distToSend = distToSend > 1024 ? 1024 : distToSend;
if ((distToSend + readPtr) >= _fifo.CPEnd) // TODO: better?
{
distToSend =_fifo.CPEnd - readPtr;
readPtr = _fifo.CPBase;
}
else
readPtr += distToSend;
}
// Execute new instructions found in uData
Fifo_SendFifoData(uData, distToSend);
Fifo_SendFifoData(uData, 32);
readPtr += 32;
if (readPtr >= _fifo.CPEnd)
readPtr = _fifo.CPBase;
Common::AtomicStore(_fifo.CPReadPointer, readPtr);
Common::AtomicAdd(_fifo.CPReadWriteDistance, -distToSend);
Common::AtomicAdd(_fifo.CPReadWriteDistance, -32);
if (_fifo.bFF_BPEnable && (readPtr == _fifo.CPBreakpoint))
{
_fifo.bFF_Breakpoint = 1;
video_initialize.pUpdateInterrupts();
}
video_initialize.pPeekMessages();
VideoFifo_CheckEFBAccess();
VideoFifo_CheckSwapRequest();
}
} while (_fifo.bFF_GPReadEnable && _fifo.CPReadWriteDistance && !(_fifo.bFF_BPEnable && _fifo.bFF_Breakpoint));
Common::AtomicStore(_fifo.CPReadIdle, 1);
video_initialize.pSetFifoIdle();
@ -196,6 +169,9 @@ void Fifo_EnterLoop(const SVideoInitialize &video_initialize)
else
{
Common::YieldCPU();
video_initialize.pPeekMessages();
VideoFifo_CheckEFBAccess();
VideoFifo_CheckSwapRequest();
}
s_criticalFifo.Leave();