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Merge pull request #13852 from Sintendo/jitarm64-subfcx

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JitArm64_Integer: subfcx optimizations
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JosJuice 2025-09-16 20:16:42 +02:00 committed by GitHub
commit 770c74cc95
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1 changed files with 35 additions and 0 deletions
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35
Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp
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@ -1445,6 +1445,41 @@ void JitArm64::subfcx(UGeckoInstruction inst)
if (inst.Rc)
ComputeRC0(gpr.GetImm(d));
}
else if (gpr.IsImm(a, 0))
{
if (d != b)
{
gpr.BindToRegister(d, false);
MOV(gpr.R(d), gpr.R(b));
}
ComputeCarry(true);
if (inst.Rc)
ComputeRC0(gpr.R(d));
}
else if (gpr.IsImm(a) && ((gpr.GetImm(a) & 0xFFF) == gpr.GetImm(a)))
{
gpr.BindToRegister(d, d == b);
CARRY_IF_NEEDED(SUB, SUBS, gpr.R(d), gpr.R(b), gpr.GetImm(a));
ComputeCarry();
if (inst.Rc)
ComputeRC0(gpr.R(d));
}
else if (gpr.IsImm(a) && ((gpr.GetImm(a) & 0xFFF000) == gpr.GetImm(a)))
{
gpr.BindToRegister(d, d == b);
CARRY_IF_NEEDED(SUB, SUBS, gpr.R(d), gpr.R(b), gpr.GetImm(a) >> 12, true);
ComputeCarry();
if (inst.Rc)
ComputeRC0(gpr.R(d));
}
else if (gpr.IsImm(b, 0))
{
gpr.BindToRegister(d, d == a);
CARRY_IF_NEEDED(NEG, NEGS, gpr.R(d), gpr.R(a));
ComputeCarry();
if (inst.Rc)
ComputeRC0(gpr.R(d));
}
else
{
gpr.BindToRegister(d, d == a || d == b);