From: Michal Krol <michal@tungstengraphics.com>
Date: Wed, 12 Nov 2008 16:14:07 +0000 (+0100)
Subject: util: Add log2() definition for MSC.
X-Git-Tag: mesa-7.8~4139^2~390^2~195
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f447eea4de9cab5de295c717d35824cf92b9f322;p=platform%2Fupstream%2Fmesa.git

util: Add log2() definition for MSC.
---

diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index be7303e..c7bbebc 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