From 8dbbae76de0a64bedad8f1c18d5aeb1f5b9ba180 Mon Sep 17 00:00:00 2001
From: JosJuice <josjuice@gmail.com>
Date: Sun, 17 Sep 2023 11:12:54 +0200
Subject: [PATCH] Jit64: Optimize ps_merge01 with Rd == Rb

---
 Source/Core/Core/PowerPC/Jit64/Jit_Paired.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Source/Core/Core/PowerPC/Jit64/Jit_Paired.cpp b/Source/Core/Core/PowerPC/Jit64/Jit_Paired.cpp
index c23b14313b..930757cdad 100644
--- a/Source/Core/Core/PowerPC/Jit64/Jit_Paired.cpp
+++ b/Source/Core/Core/PowerPC/Jit64/Jit_Paired.cpp
@@ -130,7 +130,12 @@ void Jit64::ps_mergeXX(UGeckoInstruction inst)
     avx_op(&XEmitter::VUNPCKLPD, &XEmitter::UNPCKLPD, Rd, Ra, Rb);
     break;  // 00
   case 560:
-    avx_op(&XEmitter::VSHUFPD, &XEmitter::SHUFPD, Rd, Ra, Rb, 2);
+    if (d != b)
+      avx_op(&XEmitter::VSHUFPD, &XEmitter::SHUFPD, Rd, Ra, Rb, 2);
+    else if (Ra.IsSimpleReg())
+      MOVSD(Rd, Ra);
+    else
+      MOVLPD(Rd, Ra);
     break;  // 01
   case 592:
     avx_op(&XEmitter::VSHUFPD, &XEmitter::SHUFPD, Rd, Ra, Rb, 1);