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Merge pull request #984 from LegendOfDragoon/master 

Optimize UpdateTimers
This commit is contained in:
zilmar 2016-02-06 21:14:57 +11:00
parent 917d90b057 e08b1b93ec
commit 1c7a42274f
1 changed files with 17 additions and 3 deletions
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20
Source/Project64-core/N64System/Mips/SystemTiming.cpp
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@ -161,13 +161,27 @@ void CSystemTimer::UpdateTimers()
int TimeTaken = m_LastUpdate - m_NextTimer;
if (TimeTaken != 0)
{
uint32_t random, wired;
m_LastUpdate = m_NextTimer;
g_Reg->COUNT_REGISTER += TimeTaken;
g_Reg->RANDOM_REGISTER -= TimeTaken / g_System->CountPerOp();
while ((int)g_Reg->RANDOM_REGISTER < (int)g_Reg->WIRED_REGISTER)
random = g_Reg->RANDOM_REGISTER - (TimeTaken / g_System->CountPerOp());
wired = g_Reg->WIRED_REGISTER;
if ((int)random < (int)wired)
{
g_Reg->RANDOM_REGISTER += 32 - g_Reg->WIRED_REGISTER;
if (wired == 0)
{
random &= 31;
}
else
{
uint32_t increment = 32 - wired;
do
{
random += increment;
} while ((int)random < (int)wired);
}
}
g_Reg->RANDOM_REGISTER = random;
}
}