From d531243c986dd613c5b2bf110d604cdc2d11d9e4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dani=C3=ABl=20Heres?= <danielheres@gmail.com>
Date: Tue, 20 Oct 2015 18:10:05 +0200
Subject: [PATCH] Optimize bitscanforward using intrinsic function

---
 src/util/util.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/util/util.c b/src/util/util.c
index f17ac3f424..d7f081357b 100644
--- a/src/util/util.c
+++ b/src/util/util.c
@@ -143,11 +143,16 @@ int bitscanforward(int source)
 {
 	int i;
 
+	#if _MSC_VER >= 1400 // Visual Studio 2005
+		_BitScanForward(&i, source);
+		return i;
+	#else
 	for (i = 0; i < 32; i++)
 		if (source & (1 << i))
 			return i;
 
 	return -1;
+	#endif
 }
 
 int bitcount(int source)