Core: A few micro-optimizations

src/core/timing.c

@@ -53,19 +53,19 @@ void mTimingDeschedule(struct mTiming* timing, struct mTimingEvent* event) {
 	}
 }
 
-void mTimingTick(struct mTiming* timing, int32_t cycles) {
+int32_t mTimingTick(struct mTiming* timing, int32_t cycles) {
 	timing->masterCycles += cycles;
 	uint32_t masterCycles = timing->masterCycles;
 	while (mTimingEventListSize(&timing->events)) {
 		struct mTimingEvent* next = *mTimingEventListGetPointer(&timing->events, 0);
 		int32_t nextWhen = next->when - masterCycles;
 		if (nextWhen > 0) {
-			*timing->nextEvent = nextWhen;
-			return;
+			return nextWhen;
 		}
 		mTimingEventListShift(&timing->events, 0, 1);
 		next->callback(timing, next->context, -nextWhen);
 	}
+	return *timing->nextEvent;
 }
 
 int32_t mTimingNextEvent(struct mTiming* timing) {

src/core/timing.h

@@ -32,7 +32,7 @@ void mTimingDeinit(struct mTiming* timing);
 void mTimingClear(struct mTiming* timing);
 void mTimingSchedule(struct mTiming* timing, struct mTimingEvent*, int32_t when);
 void mTimingDeschedule(struct mTiming* timing, struct mTimingEvent*);
-void mTimingTick(struct mTiming* timing, int32_t cycles);
+int32_t mTimingTick(struct mTiming* timing, int32_t cycles);
 int32_t mTimingNextEvent(struct mTiming* timing);
 
 #endif

src/gb/gb.c

@@ -546,10 +546,7 @@ void GBProcessEvents(struct LR35902Core* cpu) {
 			}
 		}
 
-		mTimingTick(&gb->timing, cycles);
-		nextEvent = cpu->nextEvent;
-
-		cpu->nextEvent = nextEvent;
+		cpu->nextEvent = mTimingTick(&gb->timing, cycles);
 
 		if (cpu->halted) {
 			cpu->cycles = cpu->nextEvent;

src/gba/gba.c

@@ -235,8 +235,8 @@ static void GBAProcessEvents(struct ARMCore* cpu) {
 		gba->springIRQ = 0;
 	}
 
-	int32_t nextEvent;
-	do {
+	int32_t nextEvent = cpu->nextEvent;
+	while (cpu->cycles >= nextEvent) {
 		int32_t cycles = cpu->cycles;
 		int32_t testEvent;
 
@@ -250,8 +250,7 @@ static void GBAProcessEvents(struct ARMCore* cpu) {
 #endif
 		nextEvent = cycles;
 		do {
-			mTimingTick(&gba->timing, nextEvent);
-			nextEvent = cpu->nextEvent;
+			nextEvent = mTimingTick(&gba->timing, nextEvent);
 		} while (gba->cpuBlocked);
 
 		testEvent = GBASIOProcessEvents(&gba->sio, cycles);
@@ -275,7 +274,7 @@ static void GBAProcessEvents(struct ARMCore* cpu) {
 			mLOG(GBA, FATAL, "Negative cycles will pass: %i", nextEvent);
 		}
 #endif
-	} while (cpu->cycles >= nextEvent);
+	}
 }
 
 void GBAAttachDebugger(struct GBA* gba, struct mDebugger* debugger) {