From ac01998c1e92f5bfef7f6145a62aff2a37c77c27 Mon Sep 17 00:00:00 2001
From: TomW <TomW@localhost>
Date: Sun, 16 Nov 2014 15:01:31 +0000
Subject: [PATCH] LOCK prefix on recompiler no longer causes following
 instruction to be executed twice - fixes Windows 2000.

---
 src/x86_ops_misc.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/x86_ops_misc.h b/src/x86_ops_misc.h
index fb685d6..7867d56 100644
--- a/src/x86_ops_misc.h
+++ b/src/x86_ops_misc.h
@@ -535,8 +535,12 @@ static int opHLT(uint32_t fetchdat)
 
 static int opLOCK(uint32_t fetchdat)
 {
+        fetchdat = fastreadl(cs + pc);
+        if (abrt) return 0;
+        pc++;
+
         CLOCK_CYCLES(4);
-        return 0;
+        return x86_opcodes[(fetchdat & 0xff) | op32](fetchdat >> 8);
 }