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x86/microVU: Only update MXCSR when it's different 

Saves reloading it when the EE and VU0 rounding modes are the same.
This commit is contained in:
Stenzek 2023-01-01 16:16:27 +10:00 committed by refractionpcsx2
parent b5a61d2915
commit 1dff9897c9
1 changed files with 17 additions and 4 deletions
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21
pcsx2/x86/microVU_Execute.inl
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@ -18,6 +18,15 @@
//------------------------------------------------------------------
// Dispatcher Functions
//------------------------------------------------------------------
static bool mvuNeedsFPCRUpdate(mV)
{
// always update on the vu1 thread
if (isVU1 && THREAD_VU1)
return true;
// otherwise only emit when it's different to the EE
return g_sseMXCSR.bitmask != (isVU0 ? g_sseVU0MXCSR.bitmask : g_sseVU1MXCSR.bitmask);
}
// Generates the code for entering/exit recompiled blocks
void mVUdispatcherAB(mV)
@ -32,7 +41,8 @@ void mVUdispatcherAB(mV)
else xFastCall((void*)mVUexecuteVU1, arg1reg, arg2reg);
// Load VU's MXCSR state
xLDMXCSR(isVU0 ? g_sseVU0MXCSR : g_sseVU1MXCSR);
if (mvuNeedsFPCRUpdate(mVU))
xLDMXCSR(isVU0 ? g_sseVU0MXCSR : g_sseVU1MXCSR);
// Load Regs
xMOVAPS (xmmT1, ptr128[&mVU.regs().VI[REG_P].UL]);
@ -71,7 +81,8 @@ void mVUdispatcherAB(mV)
mVU.exitFunct = x86Ptr;
// Load EE's MXCSR state
xLDMXCSR(g_sseMXCSR);
if (mvuNeedsFPCRUpdate(mVU))
xLDMXCSR(g_sseMXCSR);
// = The first two DWORD or smaller arguments are passed in ECX and EDX registers;
// all other arguments are passed right to left.
@ -94,7 +105,8 @@ void mVUdispatcherCD(mV)
xScopedStackFrame frame(false, true);
// Load VU's MXCSR state
xLDMXCSR(isVU0 ? g_sseVU0MXCSR : g_sseVU1MXCSR);
if (mvuNeedsFPCRUpdate(mVU))
xLDMXCSR(isVU0 ? g_sseVU0MXCSR : g_sseVU1MXCSR);
mVUrestoreRegs(mVU);
xMOV(gprF0, ptr32[&mVU.regs().micro_statusflags[0]]);
@ -114,7 +126,8 @@ void mVUdispatcherCD(mV)
xMOV(ptr32[&mVU.regs().micro_statusflags[3]], gprF3);
// Load EE's MXCSR state
xLDMXCSR(g_sseMXCSR);
if (mvuNeedsFPCRUpdate(mVU))
xLDMXCSR(g_sseMXCSR);
}
xRET();