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Optimize CheckInterrupts 

Using local variables significantly improves the performance.
This commit is contained in:
LegendOfDragoon 2016-02-09 16:59:46 -08:00
parent a43449ea0e
commit cb3ada6ece
1 changed files with 12 additions and 9 deletions
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21
Source/Project64-core/N64System/Mips/RegisterClass.cpp
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@ -307,14 +307,15 @@ void CRegisters::SetAsCurrentSystem()
void CRegisters::CheckInterrupts() void CRegisters::CheckInterrupts()
{ {
uint32_t mi_intr_reg = MI_INTR_REG, status_register;
if (!m_System->bFixedAudio() && CpuType() != CPU_SyncCores) if (!m_System->bFixedAudio() && CpuType() != CPU_SyncCores)
{ {
MI_INTR_REG &= ~MI_INTR_AI; mi_intr_reg &= ~MI_INTR_AI;
MI_INTR_REG |= (m_AudioIntrReg & MI_INTR_AI); mi_intr_reg |= (m_AudioIntrReg & MI_INTR_AI);
} }
MI_INTR_REG |= (m_RspIntrReg & MI_INTR_SP); mi_intr_reg |= (m_RspIntrReg & MI_INTR_SP);
MI_INTR_REG |= (m_GfxIntrReg & MI_INTR_DP); mi_intr_reg |= (m_GfxIntrReg & MI_INTR_DP);
if ((MI_INTR_MASK_REG & MI_INTR_REG) != 0) if ((MI_INTR_MASK_REG & mi_intr_reg) != 0)
{ {
FAKE_CAUSE_REGISTER |= CAUSE_IP2; FAKE_CAUSE_REGISTER |= CAUSE_IP2;
} }
@ -322,21 +323,23 @@ void CRegisters::CheckInterrupts()
{ {
FAKE_CAUSE_REGISTER &= ~CAUSE_IP2; FAKE_CAUSE_REGISTER &= ~CAUSE_IP2;
} }
MI_INTR_REG = mi_intr_reg;
status_register = STATUS_REGISTER;
if ((STATUS_REGISTER & STATUS_IE) == 0) if ((status_register & STATUS_IE) == 0)
{ {
return; return;
} }
if ((STATUS_REGISTER & STATUS_EXL) != 0) if ((status_register & STATUS_EXL) != 0)
{ {
return; return;
} }
if ((STATUS_REGISTER & STATUS_ERL) != 0) if ((status_register & STATUS_ERL) != 0)
{ {
return; return;
} }
if ((STATUS_REGISTER & FAKE_CAUSE_REGISTER & 0xFF00) != 0) if ((status_register & FAKE_CAUSE_REGISTER & 0xFF00) != 0)
{ {
if (m_FirstInterupt) if (m_FirstInterupt)
{ {