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-rw-r--r--src/gallium/auxiliary/util/u_math.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index be7303e550..c7bbebc428 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