bsnes/higan/sfc/alt/smp/timing.cpp

template<uint cycle_frequency>
auto SMP::Timer<cycle_frequency>::tick() -> void {
  if(++stage1_ticks < cycle_frequency) return;

  stage1_ticks = 0;
  if(enable == false) return;

  if(++stage2_ticks != target) return;

  stage2_ticks = 0;
  stage3_ticks = (stage3_ticks + 1) & 15;
}

template<uint cycle_frequency>
auto SMP::Timer<cycle_frequency>::tick(uint clocks) -> void {
  stage1_ticks += clocks;
  if(stage1_ticks < cycle_frequency) return;

  stage1_ticks -= cycle_frequency;
  if(enable == false) return;

  if(++stage2_ticks != target) return;

  stage2_ticks = 0;
  stage3_ticks = (stage3_ticks + 1) & 15;
}