From e9d4869965825d31cfb380cebbc27b3166d973ba Mon Sep 17 00:00:00 2001
From: Sintendo <bram.speeckaert@gmail.com>
Date: Wed, 5 Jun 2019 23:58:44 +0200
Subject: [PATCH] Jit64AsmCommon: Micro-optimize GenFrsqrte

Save 2 bytes by testing register against itself and branching on the
sign flag.

Before:
0:  48 0f ba e0 3f          bt     rax,0x3f

After:
0:  48 85 c0                test   rax,rax
---
 Source/Core/Core/PowerPC/Jit64Common/Jit64AsmCommon.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Source/Core/Core/PowerPC/Jit64Common/Jit64AsmCommon.cpp b/Source/Core/Core/PowerPC/Jit64Common/Jit64AsmCommon.cpp
index 81b4b27204..70224162f0 100644
--- a/Source/Core/Core/PowerPC/Jit64Common/Jit64AsmCommon.cpp
+++ b/Source/Core/Core/PowerPC/Jit64Common/Jit64AsmCommon.cpp
@@ -101,8 +101,8 @@ void CommonAsmRoutines::GenFrsqrte()
   MOVQ_xmm(XMM0, R(RSCRATCH));
   RET();
   SetJumpTarget(inf);
-  BT(64, R(RSCRATCH), Imm8(63));
-  FixupBranch negative = J_CC(CC_C);
+  TEST(64, R(RSCRATCH), R(RSCRATCH));
+  FixupBranch negative = J_CC(CC_S);
   XORPD(XMM0, R(XMM0));
   RET();