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Ensure that running exactly up to a boundary gives the bus handler the next microcycle to contemplate.

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Thomas Harte 2022-05-23 15:11:33 -04:00
parent e0a279344c
commit 34e5f39571
1 changed files with 2 additions and 2 deletions
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Processors/68000Mk2/Implementation/68000Mk2Implementation.hpp
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@ -189,11 +189,11 @@ template <class BusHandler, bool dtack_is_implicit, bool permit_overrun, bool si
void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perform>::run_for(HalfCycles duration) {
// Accumulate the newly paid-in cycles. If this instance remains in deficit, exit.
time_remaining_ += duration;
if(time_remaining_ <= HalfCycles(0)) return;
if(time_remaining_ < HalfCycles(0)) return;
// Check whether all remaining time has been expended; if so then exit, having set this line up as
// the next resumption point.
#define ConsiderExit() if(time_remaining_ <= HalfCycles(0)) { state_ = __COUNTER__+1; return; } [[fallthrough]]; case __COUNTER__:
#define ConsiderExit() if(time_remaining_ < HalfCycles(0)) { state_ = __COUNTER__+1; return; } [[fallthrough]]; case __COUNTER__:
// Subtracts `n` half-cycles from `time_remaining_`; if permit_overrun is false, also ConsiderExit()
#define Spend(n) time_remaining_ -= (n); if constexpr (!permit_overrun) ConsiderExit()