From d8ef20c85695f6272dd71dbde1b8d04bac012dbe Mon Sep 17 00:00:00 2001
From: Yuri Kunde Schlesner <yuriks@yuriks.net>
Date: Mon, 24 Aug 2015 01:15:39 -0300
Subject: [PATCH] Shader JIT: Tiny micro-optimization in DPH
---
src/video_core/shader/shader_jit_x64.cpp | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/src/video_core/shader/shader_jit_x64.cpp b/src/video_core/shader/shader_jit_x64.cpp
index ddae61caeb..c8a669b517 100644
--- a/src/video_core/shader/shader_jit_x64.cpp
+++ b/src/video_core/shader/shader_jit_x64.cpp
@@ -367,10 +367,10 @@ void JitCompiler::Compile_DPH(Instruction instr) {
// Set 4th component to 1.0
BLENDPS(SRC1, R(ONE), 0x8); // 0b1000
} else {
- // Reverse to set the 4th component to 1.0
- SHUFPS(SRC1, R(SRC1), _MM_SHUFFLE(0, 1, 2, 3));
- MOVSS(SRC1, R(ONE));
- SHUFPS(SRC1, R(SRC1), _MM_SHUFFLE(0, 1, 2, 3));
+ // Set 4th component to 1.0
+ MOVAPS(SCRATCH, R(SRC1));
+ UNPCKHPS(SCRATCH, R(ONE)); // XYZW, 1111 -> Z1__
+ UNPCKLPD(SRC1, R(SCRATCH)); // XYZW, Z1__ -> XYZ1
}
Compile_SanitizedMul(SRC1, SRC2, SCRATCH);