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JitArm64_Integer: addzex - Optimize InPPCState case for 0

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Before:
0x52800019   mov    w25, #0x0                 ; =0
0x394bd3b8   ldrb   w24, [x29, #0x2f4]
0x2b180339   adds   w25, w25, w24

After:
0x394bd3b9   ldrb   w25, [x29, #0x2f4]
This commit is contained in:
Sintendo 2024-12-28 23:20:17 +01:00
parent 14641b06fc
commit c817b4779d
1 changed files with 9 additions and 1 deletions
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10
Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp
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@ -1129,13 +1129,21 @@ void JitArm64::addzex(UGeckoInstruction inst)
int a = inst.RA, d = inst.RD; int a = inst.RA, d = inst.RD;
if (gpr.IsImm(a) && HasConstantCarry()) if (gpr.IsImm(a) &&
(HasConstantCarry() || (js.carryFlag == CarryFlag::InPPCState && gpr.GetImm(a) == 0)))
{ {
const u32 imm = gpr.GetImm(a); const u32 imm = gpr.GetImm(a);
const bool is_all_ones = imm == 0xFFFFFFFF; const bool is_all_ones = imm == 0xFFFFFFFF;
switch (js.carryFlag) switch (js.carryFlag)
{ {
case CarryFlag::InPPCState:
{
gpr.BindToRegister(d, false);
LDRB(IndexType::Unsigned, gpr.R(d), PPC_REG, PPCSTATE_OFF(xer_ca));
ComputeCarry(false);
break;
}
case CarryFlag::ConstantTrue: case CarryFlag::ConstantTrue:
{ {
gpr.SetImmediate(d, imm + 1); gpr.SetImmediate(d, imm + 1);