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-rw-r--r--src/gallium/auxiliary/util/u_math.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index 62272110ce3..fdaec8df823 100644
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -163,7 +163,8 @@ static INLINE float logf( float f )
static INLINE double log2( double x )
{
- return log( x ) / log( 2.0 );
+ const double invln2 = 1.442695041;
+ return log( x ) * invln2;
}
#else