From c9011e9d2c1a8bc8a1121d220e7a0d0b33c71e15 Mon Sep 17 00:00:00 2001
From: Sintendo <bram.speeckaert@gmail.com>
Date: Mon, 25 Jan 2021 22:59:14 +0100
Subject: [PATCH] Jit64: boolX - Special case xor with 0

No computation necessary, but we may need a MOV.

Before:
8B FE                mov         edi,esi
83 F7 00             xor         edi,0

After:
8B FE                mov         edi,esi
---
 Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp b/Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp
index 6fadcebb48..b4cb6cee39 100644
--- a/Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp
+++ b/Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp
@@ -687,10 +687,18 @@ void Jit64::boolX(UGeckoInstruction inst)
       RCOpArg Rj = gpr.Use(j, RCMode::Read);
       RCX64Reg Ra = gpr.Bind(a, RCMode::Write);
       RegCache::Realize(Rj, Ra);
-
-      if (a != j)
-        MOV(32, Ra, Rj);
-      XOR(32, Ra, Imm32(imm));
+      if (imm == 0)
+      {
+        if (a != j)
+          MOV(32, Ra, Rj);
+        needs_test = true;
+      }
+      else
+      {
+        if (a != j)
+          MOV(32, Ra, Rj);
+        XOR(32, Ra, Imm32(imm));
+      }
     }
     else if (is_and)
     {