[ARM32] negx optimization if source is immediate

2014-11-29 04:02:57 +00:00 · 2014-11-29 04:02:57 +00:00 · 9c82adb14f
parent 1dbb39f791
commit 9c82adb14f
1 changed files with 8 additions and 0 deletions
--- a/Source/Core/Core/PowerPC/JitArm32/JitArm_Integer.cpp
+++ b/Source/Core/Core/PowerPC/JitArm32/JitArm_Integer.cpp
@ -850,6 +850,14 @@ void JitArm::negx(UGeckoInstruction inst)
 	INSTRUCTION_START
 	JITDISABLE(bJITIntegerOff);

+	if (gpr.IsImm(inst.RA))
+	{
+		gpr.SetImmediate(inst.RD, ~gpr.GetImm(inst.RA) + 1);
+		if (inst.Rc)
+			ComputeRC(gpr.GetImm(inst.RD), 0);
+		return;
+	}
+
 	gpr.BindToRegister(inst.RD, inst.RD == inst.RA);
 	ARMReg RD = gpr.R(inst.RD);
 	ARMReg RA = gpr.R(inst.RA);