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harmless DMA micro optimisation

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This commit is contained in:
RSDuck
2020-11-16 17:22:34 +01:00
parent 1085cc14a4
commit 842379c410
3 changed files with 47 additions and 42 deletions
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55
src/DMA.cpp
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@ -77,21 +77,6 @@ void DMA::Reset()
Running = false;
InProgress = false;
if (NDS::ConsoleType == 1)
{
BusRead16 = (CPU==0) ? DSi::ARM9Read16 : DSi::ARM7Read16;
BusRead32 = (CPU==0) ? DSi::ARM9Read32 : DSi::ARM7Read32;
BusWrite16 = (CPU==0) ? DSi::ARM9Write16 : DSi::ARM7Write16;
BusWrite32 = (CPU==0) ? DSi::ARM9Write32 : DSi::ARM7Write32;
}
else
{
BusRead16 = (CPU==0) ? NDS::ARM9Read16 : NDS::ARM7Read16;
BusRead32 = (CPU==0) ? NDS::ARM9Read32 : NDS::ARM7Read32;
BusWrite16 = (CPU==0) ? NDS::ARM9Write16 : NDS::ARM7Write16;
BusWrite32 = (CPU==0) ? NDS::ARM9Write32 : NDS::ARM7Write32;
}
}
void DMA::DoSavestate(Savestate* file)
@ -198,13 +183,7 @@ void DMA::Start()
NDS::StopCPU(CPU, 1<<Num);
}
void DMA::Run()
{
if (!Running) return;
if (CPU == 0) return Run9();
else return Run7();
}
template <int ConsoleType>
void DMA::Run9()
{
if (NDS::ARM9Timestamp >= NDS::ARM9Target) return;
@ -242,7 +221,10 @@ void DMA::Run9()
{
NDS::ARM9Timestamp += (unitcycles << NDS::ARM9ClockShift);
BusWrite16(CurDstAddr, BusRead16(CurSrcAddr));
if (ConsoleType == 1)
DSi::ARM9Write16(CurDstAddr, DSi::ARM9Read16(CurSrcAddr));
else
NDS::ARM9Write16(CurDstAddr, NDS::ARM9Read16(CurSrcAddr));
CurSrcAddr += SrcAddrInc<<1;
CurDstAddr += DstAddrInc<<1;
@ -278,7 +260,10 @@ void DMA::Run9()
{
NDS::ARM9Timestamp += (unitcycles << NDS::ARM9ClockShift);
BusWrite32(CurDstAddr, BusRead32(CurSrcAddr));
if (ConsoleType == 1)
DSi::ARM9Write32(CurDstAddr, DSi::ARM9Read32(CurSrcAddr));
else
NDS::ARM9Write32(CurDstAddr, NDS::ARM9Read32(CurSrcAddr));
CurSrcAddr += SrcAddrInc<<2;
CurDstAddr += DstAddrInc<<2;
@ -317,6 +302,7 @@ void DMA::Run9()
NDS::ResumeCPU(0, 1<<Num);
}
template <int ConsoleType>
void DMA::Run7()
{
if (NDS::ARM7Timestamp >= NDS::ARM7Target) return;
@ -354,7 +340,10 @@ void DMA::Run7()
{
NDS::ARM7Timestamp += unitcycles;
BusWrite16(CurDstAddr, BusRead16(CurSrcAddr));
if (ConsoleType == 1)
DSi::ARM7Write16(CurDstAddr, DSi::ARM7Read16(CurSrcAddr));
else
NDS::ARM7Write16(CurDstAddr, NDS::ARM7Read16(CurSrcAddr));
CurSrcAddr += SrcAddrInc<<1;
CurDstAddr += DstAddrInc<<1;
@ -390,7 +379,10 @@ void DMA::Run7()
{
NDS::ARM7Timestamp += unitcycles;
BusWrite32(CurDstAddr, BusRead32(CurSrcAddr));
if (ConsoleType == 1)
DSi::ARM7Write32(CurDstAddr, DSi::ARM7Read32(CurSrcAddr));
else
NDS::ARM7Write32(CurDstAddr, NDS::ARM7Read32(CurSrcAddr));
CurSrcAddr += SrcAddrInc<<2;
CurDstAddr += DstAddrInc<<2;
@ -425,3 +417,14 @@ void DMA::Run7()
InProgress = false;
NDS::ResumeCPU(1, 1<<Num);
}
template <int ConsoleType>
void DMA::Run()
{
if (!Running) return;
if (CPU == 0) return Run9<ConsoleType>();
else return Run7<ConsoleType>();
}
template void DMA::Run<0>();
template void DMA::Run<1>();