From 50357ad35181b7b170abe8413d4ef772978aa5f5 Mon Sep 17 00:00:00 2001
From: Michal Krol <michal@tungstengraphics.com>
Date: Wed, 12 Nov 2008 17:14:07 +0100
Subject: util: Add log2() definition for MSC.

---
 src/gallium/auxiliary/util/u_math.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/gallium/auxiliary')

diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index d2eaa2e7f7..62272110ce 100644
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -161,6 +161,11 @@ static INLINE float logf( float f )
    return (float) log( (double) f );
 }
 
+static INLINE double log2( double x )
+{
+   return log( x ) / log( 2.0 );
+}
+
 #else
 /* Work-around an extra semi-colon in VS 2005 logf definition */
 #ifdef logf
-- 
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