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slightly optimize main loop

This commit is contained in:
Jaklyy 2024-12-15 22:02:41 -05:00
parent c40efab62f
commit e77c2011bc
1 changed files with 33 additions and 37 deletions
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70
src/NDS.cpp
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@ -1757,51 +1757,47 @@ u32 NDS::RunFrame()
ARM9Target = target << ARM9ClockShift;
//ARM7Target = target;
//while ((std::max(std::max(ARM9Timestamp, DMA9Timestamp), A9ContentionTS << ARM9ClockShift) < (target << ARM9ClockShift)) && (ARM7Timestamp < target))
while (std::max(std::max(ARM9Timestamp, DMA9Timestamp), A9ContentionTS << ARM9ClockShift) < ARM9Target)
{
//while (std::max(std::max(ARM9Timestamp, DMA9Timestamp), A9ContentionTS << ARM9ClockShift) < (target << ARM9ClockShift))
{
//ARM9Target = target << ARM9ClockShift;
CurCPU = 0;
RunTimers(0);
GPU.GPU3D.Run();
CurCPU = 0;
RunTimers(0);
GPU.GPU3D.Run();
if (ARM9.MRTrack.Type == MainRAMType::Null)
if (ARM9.MRTrack.Type == MainRAMType::Null)
{
if (CPUStop & CPUStop_GXStall)
{
if (CPUStop & CPUStop_GXStall)
// GXFIFO stall
s32 cycles = GPU.GPU3D.CyclesToRunFor();
DMA9Timestamp = std::min(ARM9Target, std::max(ARM9Timestamp+(cycles<<ARM9ClockShift), DMA9Timestamp+(cycles<<ARM9ClockShift)));
}
else if (CPUStop & CPUStop_DMA9)
{
DMAs[0].Run();
if (!(CPUStop & CPUStop_GXStall) && (ARM9.MRTrack.Type == MainRAMType::Null)) DMAs[1].Run();
if (!(CPUStop & CPUStop_GXStall) && (ARM9.MRTrack.Type == MainRAMType::Null)) DMAs[2].Run();
if (!(CPUStop & CPUStop_GXStall) && (ARM9.MRTrack.Type == MainRAMType::Null)) DMAs[3].Run();
if (ConsoleType == 1)
{
// GXFIFO stall
s32 cycles = GPU.GPU3D.CyclesToRunFor();
DMA9Timestamp = std::min(ARM9Target, std::max(ARM9Timestamp+(cycles<<ARM9ClockShift), DMA9Timestamp+(cycles<<ARM9ClockShift)));
}
else if (CPUStop & CPUStop_DMA9)
{
DMAs[0].Run();
if (!(CPUStop & CPUStop_GXStall) && (ARM9.MRTrack.Type == MainRAMType::Null)) DMAs[1].Run();
if (!(CPUStop & CPUStop_GXStall) && (ARM9.MRTrack.Type == MainRAMType::Null)) DMAs[2].Run();
if (!(CPUStop & CPUStop_GXStall) && (ARM9.MRTrack.Type == MainRAMType::Null)) DMAs[3].Run();
if (ConsoleType == 1)
{
auto& dsi = dynamic_cast<melonDS::DSi&>(*this);
dsi.RunNDMAs(0);
}
}
else
{
//if (ARM9.abt) ARM9Timestamp = ARM9Target;
ARM9.Execute<cpuMode>();
auto& dsi = dynamic_cast<melonDS::DSi&>(*this);
dsi.RunNDMAs(0);
}
}
//printf("MAIN LOOP: 9 %lli %08X %08llX %i 7 %lli %08X %08llX %i %i %08X\n", ARM9Timestamp>>ARM9ClockShift, ARM9.PC, ARM9.CurInstr, (u8)ARM9.MRTrack.Type, ARM7Timestamp, ARM7.R[15], ARM7.CurInstr, (u8)ARM7.MRTrack.Type, IME[1], IE[1]);
RunTimers(0);
GPU.GPU3D.Run();
//if (MainRAMHandle()) break;
MainRAMHandle();
else
{
//if (ARM9.abt) ARM9Timestamp = ARM9Target;
ARM9.Execute<cpuMode>();
}
}
//printf("MAIN LOOP: 9 %lli %08X %08llX %i 7 %lli %08X %08llX %i %i %08X\n", ARM9Timestamp>>ARM9ClockShift, ARM9.PC, ARM9.CurInstr, (u8)ARM9.MRTrack.Type, ARM7Timestamp, ARM7.R[15], ARM7.CurInstr, (u8)ARM7.MRTrack.Type, IME[1], IE[1]);
RunTimers(0);
GPU.GPU3D.Run();
//if (MainRAMHandle()) break;
MainRAMHandle();
target = std::max(std::max(ARM9Timestamp, DMA9Timestamp) >> ARM9ClockShift, A9ContentionTS);
if (target == ARM7Timestamp) target++;