From 7a5f63e0f5925ff29f589883e04d3c66779f4f17 Mon Sep 17 00:00:00 2001
From: lightningterror <18107717+lightningterror@users.noreply.github.com>
Date: Fri, 5 Aug 2022 22:52:48 +0200
Subject: [PATCH] GS-metal: Move PABE shader bit to the top of sw blending.

Early return when there is no sw blending, no need to run the blend code.
Optimization.
---
 pcsx2/GS/Renderers/Metal/tfx.metal | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/pcsx2/GS/Renderers/Metal/tfx.metal b/pcsx2/GS/Renderers/Metal/tfx.metal
index a0e6119577..5ed97ce421 100644
--- a/pcsx2/GS/Renderers/Metal/tfx.metal
+++ b/pcsx2/GS/Renderers/Metal/tfx.metal
@@ -725,6 +725,13 @@ struct PSMain
 	{
 		if (SW_BLEND)
 		{
+			// PABE
+			if (PS_PABE)
+			{
+				// No blending so early exit
+				if (As < 1.0f)
+					return;
+			}
 
 			float Ad = PS_DFMT == FMT_24 ? 1.f : trunc(current_color.a * 255.5f) / 128.f;
 
@@ -743,9 +750,6 @@ struct PSMain
 				Color.rgb = D;
 			else
 				Color.rgb = trunc((A - B) * C + D);
-
-			if (PS_PABE)
-				Color.rgb = (As >= 1.f) ? Color.rgb : Cs;
 		}
 		else
 		{