[ARM] Make fnabsx and ps_nabs quicker. Sleep deprivation got the bett…

…er of me.
dolphin-emu · Sep 7, 2013 · 67c6583 · 67c6583
1 parent ef05a14
commit 67c6583
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Showing 2 changed files with 4 additions and 12 deletions.
diff --git a/Source/Core/Core/Src/PowerPC/JitArm32/JitArm_FloatingPoint.cpp b/Source/Core/Core/Src/PowerPC/JitArm32/JitArm_FloatingPoint.cpp
@@ -60,11 +60,8 @@ void JitArm::fnabsx(UGeckoInstruction inst)
 	ARMReg vD = fpr.R0(inst.FD, false);
 	ARMReg V0 = fpr.GetReg();
 
-	// XXX: Could be done quicker
 	VABS(vD, vB);
-	VMOV(V0, vD);
-	VSUB(vD, vD, V0);
-	VSUB(vD, vD, V0);
+	VNEG(vD, vD);
 
 	fpr.Unlock(V0);
 	if (inst.Rc) Helper_UpdateCR1(vD);

diff --git a/Source/Core/Core/Src/PowerPC/JitArm32/JitArm_Paired.cpp b/Source/Core/Core/Src/PowerPC/JitArm32/JitArm_Paired.cpp
@@ -355,15 +355,10 @@ void JitArm::ps_nabs(UGeckoInstruction inst)
 	ARMReg vD1 = fpr.R1(d, false);
 	ARMReg V0 = fpr.GetReg();
 
-	// XXX: Could be done quicker
 	VABS(vD0, vB0);
-	VMOV(V0, vD0);
-	VSUB(vD0, vD0, V0);
-	VSUB(vD0, vD0, V0);
+	VNEG(vD0, vD0);
 	VABS(vD1, vB1);
-	VMOV(V0, vD1);
-	VSUB(vD1, vD1, V0);
-	VSUB(vD1, vD1, V0);
-
+	VNEG(vD1, vD1);
+
 	fpr.Unlock(V0);
 }