From f8eae0ac1544ffc6e394e6cb77af00d7824b9128 Mon Sep 17 00:00:00 2001
From: vit9696 <4348897+vit9696@users.noreply.github.com>
Date: Thu, 14 Jun 2018 01:04:20 +0300
Subject: [PATCH] Refactor confusing if for xacquire/xrelease (#1173)

Sync with https://github.com/llvm-mirror/llvm/blob/7cdce81/lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp#L362
---
 arch/X86/X86DisassemblerDecoder.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/X86/X86DisassemblerDecoder.c b/arch/X86/X86DisassemblerDecoder.c
index 53ad4867..304a2592 100644
--- a/arch/X86/X86DisassemblerDecoder.c
+++ b/arch/X86/X86DisassemblerDecoder.c
@@ -542,9 +542,8 @@ static int readPrefixes(struct InternalInstruction *insn)
 			 * - it is followed by an xchg instruction
 			 * then it should be disassembled as a xacquire/xrelease not repne/rep.
 			 */
-			if ((byte == 0xf2 || byte == 0xf3) &&
-					((nextByte == 0xf0) |
-					 ((nextByte & 0xfe) == 0x86 || (nextByte & 0xf8) == 0x90)))
+			if (((nextByte == 0xf0) ||
+				((nextByte & 0xfe) == 0x86 || (nextByte & 0xf8) == 0x90)))
 				insn->xAcquireRelease = true;
 			/*
 			 * Also if the byte is 0xf3, and the following condition is met: