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11% performance boost on x64 by reducing branches

This commit is contained in:
Dwedit 2018-03-28 15:35:19 -05:00 committed by Brandon Wright
parent a230f67567
commit 2cbb3f6cf7
1 changed files with 6 additions and 6 deletions
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12
cpuexec.h
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@ -287,25 +287,25 @@ static inline void S9xFixCycles (void)
static inline void S9xCheckInterrupts (void) static inline void S9xCheckInterrupts (void)
{ {
bool8 thisIRQ = PPU.HTimerEnabled || PPU.VTimerEnabled; bool8 thisIRQ = PPU.HTimerEnabled | PPU.VTimerEnabled;
if (CPU.IRQLine && thisIRQ) if (CPU.IRQLine & thisIRQ)
CPU.IRQTransition = TRUE; CPU.IRQTransition = TRUE;
if (PPU.HTimerEnabled) if (PPU.HTimerEnabled)
{ {
int32 htimepos = PPU.HTimerPosition; int32 htimepos = PPU.HTimerPosition;
if (CPU.Cycles >= Timings.H_Max && htimepos < CPU.PrevCycles) if (CPU.Cycles >= Timings.H_Max & htimepos < CPU.PrevCycles)
htimepos += Timings.H_Max; htimepos += Timings.H_Max;
if (CPU.PrevCycles >= htimepos || CPU.Cycles < htimepos) if (CPU.PrevCycles >= htimepos | CPU.Cycles < htimepos)
thisIRQ = FALSE; thisIRQ = FALSE;
} }
if (PPU.VTimerEnabled) if (PPU.VTimerEnabled)
{ {
int32 vcounter = CPU.V_Counter; int32 vcounter = CPU.V_Counter;
if (CPU.Cycles >= Timings.H_Max && (!PPU.HTimerEnabled || PPU.HTimerPosition < CPU.PrevCycles)) { if (CPU.Cycles >= Timings.H_Max & (!PPU.HTimerEnabled | PPU.HTimerPosition < CPU.PrevCycles)) {
vcounter++; vcounter++;
if(vcounter >= Timings.V_Max) if(vcounter >= Timings.V_Max)
vcounter = 0; vcounter = 0;
@ -315,7 +315,7 @@ static inline void S9xCheckInterrupts (void)
thisIRQ = FALSE; thisIRQ = FALSE;
} }
if (!CPU.IRQLastState && thisIRQ) if (!CPU.IRQLastState & thisIRQ)
{ {
#ifdef DEBUGGER #ifdef DEBUGGER
S9xTraceFormattedMessage("--- /IRQ High->Low prev HC:%04d curr HC:%04d HTimer:%d Pos:%04d VTimer:%d Pos:%03d", S9xTraceFormattedMessage("--- /IRQ High->Low prev HC:%04d curr HC:%04d HTimer:%d Pos:%04d VTimer:%d Pos:%03d",