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552c0d8404
This moves all the byte swapping utilities into a header named Swap.h. A dedicated header is much more preferable here due to the size of the code itself. In general usage throughout the codebase, CommonFuncs.h was generally only included for these functions anyway. These being in their own header avoids dumping the lesser used utilities into scope. As well as providing a localized area for more utilities related to byte swapping in the future (should they be needed). This also makes it nicer to identify which files depend on the byte swapping utilities in particular. Since this is a completely new header, moving the code uncovered a few indirect includes, as well as making some other inclusions unnecessary.
158 lines
3.5 KiB
C++
158 lines
3.5 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "Core/HW/GPFifo.h"
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#include <cstring>
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#include "Common/ChunkFile.h"
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#include "Common/CommonTypes.h"
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#include "Common/Swap.h"
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#include "Core/HW/Memmap.h"
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#include "Core/HW/ProcessorInterface.h"
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#include "Core/PowerPC/JitInterface.h"
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#include "VideoCommon/CommandProcessor.h"
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namespace GPFifo
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{
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// 32 Byte gather pipe with extra space
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// Overfilling is no problem (up to the real limit), CheckGatherPipe will blast the
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// contents in nicely sized chunks
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//
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// Other optimizations to think about:
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// - If the GP is NOT linked to the FIFO, just blast to memory byte by word
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// - If the GP IS linked to the FIFO, use a fast wrapping buffer and skip writing to memory
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//
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// Both of these should actually work! Only problem is that we have to decide at run time,
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// the same function could use both methods. Compile 2 different versions of each such block?
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// More room for the fastmodes
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alignas(32) u8 m_gatherPipe[GATHER_PIPE_SIZE * 16];
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// pipe counter
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u32 m_gatherPipeCount = 0;
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void DoState(PointerWrap& p)
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{
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p.Do(m_gatherPipe);
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p.Do(m_gatherPipeCount);
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}
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void Init()
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{
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ResetGatherPipe();
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memset(m_gatherPipe, 0, sizeof(m_gatherPipe));
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}
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bool IsEmpty()
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{
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return m_gatherPipeCount == 0;
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}
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void ResetGatherPipe()
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{
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m_gatherPipeCount = 0;
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}
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static void UpdateGatherPipe()
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{
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u32 cnt;
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u8* curMem = Memory::GetPointer(ProcessorInterface::Fifo_CPUWritePointer);
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for (cnt = 0; m_gatherPipeCount >= GATHER_PIPE_SIZE; cnt += GATHER_PIPE_SIZE)
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{
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// copy the GatherPipe
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memcpy(curMem, m_gatherPipe + cnt, GATHER_PIPE_SIZE);
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m_gatherPipeCount -= GATHER_PIPE_SIZE;
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// increase the CPUWritePointer
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if (ProcessorInterface::Fifo_CPUWritePointer == ProcessorInterface::Fifo_CPUEnd)
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{
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ProcessorInterface::Fifo_CPUWritePointer = ProcessorInterface::Fifo_CPUBase;
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curMem = Memory::GetPointer(ProcessorInterface::Fifo_CPUWritePointer);
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}
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else
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{
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curMem += GATHER_PIPE_SIZE;
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ProcessorInterface::Fifo_CPUWritePointer += GATHER_PIPE_SIZE;
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}
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CommandProcessor::GatherPipeBursted();
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}
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// move back the spill bytes
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memmove(m_gatherPipe, m_gatherPipe + cnt, m_gatherPipeCount);
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}
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void FastCheckGatherPipe()
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{
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if (m_gatherPipeCount >= GATHER_PIPE_SIZE)
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{
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UpdateGatherPipe();
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}
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}
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void CheckGatherPipe()
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{
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if (m_gatherPipeCount >= GATHER_PIPE_SIZE)
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{
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UpdateGatherPipe();
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// Profile where slow FIFO writes are occurring.
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JitInterface::CompileExceptionCheck(JitInterface::ExceptionType::FIFOWrite);
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}
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}
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void Write8(const u8 value)
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{
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FastWrite8(value);
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CheckGatherPipe();
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}
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void Write16(const u16 value)
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{
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FastWrite16(value);
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CheckGatherPipe();
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}
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void Write32(const u32 value)
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{
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FastWrite32(value);
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CheckGatherPipe();
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}
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void Write64(const u64 value)
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{
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FastWrite64(value);
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CheckGatherPipe();
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}
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void FastWrite8(const u8 value)
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{
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m_gatherPipe[m_gatherPipeCount] = value;
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++m_gatherPipeCount;
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}
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void FastWrite16(u16 value)
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{
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value = Common::swap16(value);
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std::memcpy(&m_gatherPipe[m_gatherPipeCount], &value, sizeof(u16));
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m_gatherPipeCount += sizeof(u16);
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}
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void FastWrite32(u32 value)
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{
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value = Common::swap32(value);
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std::memcpy(&m_gatherPipe[m_gatherPipeCount], &value, sizeof(u32));
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m_gatherPipeCount += sizeof(u32);
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}
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void FastWrite64(u64 value)
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{
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value = Common::swap64(value);
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std::memcpy(&m_gatherPipe[m_gatherPipeCount], &value, sizeof(u64));
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m_gatherPipeCount += sizeof(u64);
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}
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} // end of namespace GPFifo
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