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Optimise GPFIFO command processing

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GPFIFO code is very high throughput due to the sheer number of commands used for rendering. Adjust some types and switch to a if statement with hints to slightly increase processing speed.
This commit is contained in:
Billy Laws 2022-09-29 20:26:48 +01:00
parent 2cdf6c1fe6
commit bd7eee8e2b
1 changed files with 22 additions and 21 deletions
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43
app/src/main/cpp/skyline/soc/gm20b/gpfifo.cpp
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@ -61,7 +61,7 @@ namespace skyline::soc::gm20b {
* @brief Checks if a method is 'pure' i.e. does not touch macro or GPFIFO methods
*/
bool Pure() const {
u16 size{[&]() -> u16 {
u32 size{[&]() -> u32 {
switch (secOp) {
case SecOp::NonIncMethod:
case SecOp::ImmdDataMethod:
@ -73,7 +73,7 @@ namespace skyline::soc::gm20b {
}
}()};
u16 end{static_cast<u16>(methodAddress + size)};
u32 end{static_cast<u32>(methodAddress + size)};
return end < engine::EngineMethodsEnd && methodAddress >= engine::GPFIFO::RegisterCount;
}
};
@ -212,12 +212,13 @@ namespace skyline::soc::gm20b {
// Process more methods if the entries are still not all used up after handling resuming
for (; entry != pushBuffer.end(); entry++) {
if (entry >= pushBuffer.end())
if (entry >= pushBuffer.end()) [[unlikely]]
throw exception("GPFIFO buffer overflow!"); // This should never happen
// An entry containing all zeroes is a NOP, skip over it
if (*entry == 0)
continue;
// Entries containing all zeroes is a NOP, skip over them
for (; *entry == 0; entry++)
if (entry == std::prev(pushBuffer.end()))
return;
PushBufferMethodHeader methodHeader{.raw = *entry};
@ -279,6 +280,7 @@ namespace skyline::soc::gm20b {
}
}
#pragma unroll(2)
for (u32 i{}; i < methodHeader.methodCount; i++)
SendPure(methodHeader.methodAddress + methodOffset(i), *++entry, methodHeader.methodSubChannel);
} else {
@ -299,23 +301,22 @@ namespace skyline::soc::gm20b {
* @return If the this was the final method in the current GpEntry
*/
auto processMethod{[&] () -> bool {
switch (methodHeader.secOp) {
case PushBufferMethodHeader::SecOp::IncMethod:
return dispatchCalls.operator()<MethodResumeState::State::Inc>();
case PushBufferMethodHeader::SecOp::NonIncMethod:
return dispatchCalls.operator()<MethodResumeState::State::NonInc>();
case PushBufferMethodHeader::SecOp::OneInc:
return dispatchCalls.operator()<MethodResumeState::State::OneInc>();
case PushBufferMethodHeader::SecOp::ImmdDataMethod:
if (methodHeader.Pure())
SendPure(methodHeader.methodAddress, methodHeader.immdData, methodHeader.methodSubChannel);
else
SendFull(methodHeader.methodAddress, methodHeader.immdData, methodHeader.methodSubChannel, true);
if (methodHeader.secOp == PushBufferMethodHeader::SecOp::IncMethod) [[likely]] {
return dispatchCalls.operator()<MethodResumeState::State::Inc>();
} else if (methodHeader.secOp == PushBufferMethodHeader::SecOp::OneInc) [[likely]] {
return dispatchCalls.operator()<MethodResumeState::State::OneInc>();
} else if (methodHeader.secOp == PushBufferMethodHeader::SecOp::ImmdDataMethod) {
if (methodHeader.Pure())
SendPure(methodHeader.methodAddress, methodHeader.immdData, methodHeader.methodSubChannel);
else
SendFull(methodHeader.methodAddress, methodHeader.immdData, methodHeader.methodSubChannel, true);
return false;
case PushBufferMethodHeader::SecOp::EndPbSegment:
return false;
} else if (methodHeader.secOp == PushBufferMethodHeader::SecOp::NonIncMethod) [[unlikely]] {
return dispatchCalls.operator()<MethodResumeState::State::NonInc>();
} else if (methodHeader.secOp == PushBufferMethodHeader::SecOp::EndPbSegment) [[unlikely]] {
return true;
default:
} else {
throw exception("Unsupported pushbuffer method SecOp: {}", static_cast<u8>(methodHeader.secOp));
}
}};