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Jit64: boolX - Special case xor with 0xFFFFFFFF

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Ever so slightly shorter.

When the condition register needs updating, we still prefer xor over
not+test.

Before:
45 8B F5             mov         r14d,r13d
41 83 F6 FF          xor         r14d,0FFFFFFFFh

After:
45 8B F5             mov         r14d,r13d
41 F7 D6             not         r14d
This commit is contained in:
Sintendo 2021-01-25 23:25:38 +01:00
commit c3775588df
1 changed files with 6 additions and 0 deletions
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6
Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp
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@ -693,6 +693,12 @@ void Jit64::boolX(UGeckoInstruction inst)
MOV(32, Ra, Rj); MOV(32, Ra, Rj);
needs_test = true; needs_test = true;
} }
else if (imm == 0xFFFFFFFF && !inst.Rc)
{
if (a != j)
MOV(32, Ra, Rj);
NOT(32, Ra);
}
else else
{ {
if (a != j) if (a != j)