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Jit64: Replace MOVSD with MOVAPD in software FMA

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Should be a little faster by avoiding false dependencies. Note that
there is one remaining MOVSD that really needs to be a MOVSD.
This commit is contained in:
JosJuice 2025-09-28 15:57:10 +02:00
parent caad84c636
commit d5067b6276
1 changed files with 16 additions and 2 deletions
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18
Source/Core/Core/PowerPC/Jit64/Jit_FloatingPoint.cpp
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@ -443,6 +443,8 @@ void Jit64::fmaddXX(UGeckoInstruction inst)
{
if (round_input)
Force25BitPrecision(XMM1, Rc, XMM2);
else if (Rc.IsSimpleReg())
MOVAPD(XMM1, Rc);
else
MOVSD(XMM1, Rc);
}
@ -461,8 +463,15 @@ void Jit64::fmaddXX(UGeckoInstruction inst)
if (i == 0)
{
MOVSD(XMM0, Ra);
MOVSD(XMM2, Rb);
if (Ra.IsSimpleReg())
MOVAPD(XMM0, Ra);
else
MOVSD(XMM0, Ra);
if (Rb.IsSimpleReg())
MOVAPD(XMM2, Rb);
else
MOVSD(XMM2, Rb);
}
else
{
@ -480,9 +489,14 @@ void Jit64::fmaddXX(UGeckoInstruction inst)
}
if (packed)
{
// result_xmm's upper lane has the result of the first loop iteration
MOVSD(R(result_xmm), XMM0);
}
else
{
DEBUG_ASSERT(result_xmm == XMM0);
}
if (madds_accurate_nans)
{