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Vif: Backup and restore non-volatile SSE registers

This commit is contained in:
TheLastRar 2025-01-23 21:41:44 +00:00 committed by Ty
parent ea4d988082
commit bd4a6a10f9
1 changed files with 70 additions and 3 deletions
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73
pcsx2/x86/Vif_Dynarec.cpp
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@ -100,13 +100,13 @@ void VifUnpackSSE_Dynarec::doMaskWrite(const xRegisterSSE& regX) const
if (m5 < 0xf)
{
xPXOR(xmmTemp, xmmTemp);
if (doMode == 3)
{
mVUmergeRegs(xmmRow, regX, m5);
}
else
{
xPXOR(xmmTemp, xmmTemp);
mVUmergeRegs(xmmTemp, xmmRow, m5);
xPADD.D(regX, xmmTemp);
if (doMode == 2)
@ -254,11 +254,54 @@ void VifUnpackSSE_Dynarec::CompileRoutine()
pxAssume(vCL == 0);
// Need a zero register for V2_32/V3 unpacks.
const bool needXmmZero = (upkNum >= 8 && upkNum <= 10) || upkNum == 4;
#ifdef _WIN32
// See SetMasks()
const u32 m0 = vB.mask;
const u32 m3 = ((m0 & 0xaaaaaaaa) >> 1) & ~m0;
const u32 m2 = (m0 & 0x55555555) & (~m0 >> 1);
const bool needXmmRow = ((doMask && m2) || doMode);
// see doMaskWrite()
const u32 m4 = (m0 & ~((m3 << 1) | m2)) & 0x55555555;
const u32 m5 = ~(m2 | m3 | m4) & 0x0f0f0f0f;
const bool needXmmTemp = doMode && (doMode != 3) && doMask && m5 != 0x0f0f0f0f;
// Backup non-volatile registers if needed
if (needXmmZero || needXmmRow || needXmmTemp)
{
int toBackup = 0;
if (needXmmRow)
toBackup++;
if (needXmmTemp)
toBackup++;
if (needXmmZero)
toBackup++;
xSUB(rsp, 8 + 16 * toBackup);
int idx = 0;
if (needXmmRow)
{
xMOVAPS(ptr128[rsp], xmmRow); // xmm6
idx++;
}
if (needXmmTemp)
{
xMOVAPS(ptr128[rsp + 16 * idx], xmmTemp); // xmm7
idx++;
}
if (needXmmZero)
xMOVAPS(ptr128[rsp + 16 * idx], zeroReg); // xmm15
}
#endif
// Value passed determines # of col regs we need to load
SetMasks(isFill ? blockSize : cycleSize);
// Need a zero register for V2_32/V3 unpacks.
if ((upkNum >= 8 && upkNum <= 10) || upkNum == 4)
if (needXmmZero)
xXOR.PS(zeroReg, zeroReg);
while (vNum)
@ -307,6 +350,30 @@ void VifUnpackSSE_Dynarec::CompileRoutine()
if (doMode >= 2)
writeBackRow();
#ifdef _WIN32
// Restore non-volatile registers
if (needXmmZero || needXmmRow || needXmmTemp)
{
int toRestore = 0;
if (needXmmRow)
{
xMOVAPS(xmmRow, ptr128[rsp]); // xmm6
toRestore++;
}
if (needXmmTemp)
{
xMOVAPS(xmmTemp, ptr128[rsp + 16 * toRestore]); // xmm7
toRestore++;
}
if (needXmmZero)
{
xMOVAPS(zeroReg, ptr128[rsp + 16 * toRestore]); // xmm15
toRestore++;
}
xADD(rsp, 8 + 16 * toRestore);
}
#endif
xRET();
}