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GSP: Implements preliminary command synchronization via GPU interrupts.

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Core: Added a comment to explain the logic for the RunLoop iterations.
This commit is contained in:
bunnei 2014-07-22 22:59:26 -04:00
parent c48ab0bd9e
commit ec14ffe1cd
4 changed files with 140 additions and 29 deletions
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20
src/core/core.cpp
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@ -26,21 +26,25 @@ ARM_Interface* g_sys_core = nullptr; ///< ARM11 system (OS) core
/// Run the core CPU loop
void RunLoop() {
for (;;){
g_app_core->Run(GPU::kFrameTicks);
// This function loops for 100 instructions in the CPU before trying to update hardware.
// This is a little bit faster than SingleStep, and should be pretty much equivalent. The
// number of instructions chosen is fairly arbitrary, however a large number will more
// drastically affect the frequency of GSP interrupts and likely break things. The point of
// this is to just loop in the CPU for more than 1 instruction to reduce overhead and make
// it a little bit faster...
g_app_core->Run(100);
HW::Update();
Kernel::Reschedule();
if (HLE::g_reschedule) {
Kernel::Reschedule();
}
}
}
/// Step the CPU one instruction
void SingleStep() {
g_app_core->Step();
// Update and reschedule after approx. 1 frame
u64 current_ticks = Core::g_app_core->GetTicks();
if ((current_ticks - g_last_ticks) >= GPU::kFrameTicks || HLE::g_reschedule) {
g_last_ticks = current_ticks;
HW::Update();
HW::Update();
if (HLE::g_reschedule) {
Kernel::Reschedule();
}
}