diff options
| author | Michal Krol <michal@tungstengraphics.com> | 2008-11-12 19:02:41 +0100 |
|---|---|---|
| committer | Michal Krol <michal@tungstengraphics.com> | 2008-11-12 19:02:41 +0100 |
| commit | 0d8637451b7bf1aac164dba6d269d1a665160ea3 (patch) | |
| tree | b0c4d7d49c96501aa87ca6ae95d245249f83c2ef /src/gallium/auxiliary | |
| parent | f447eea4de9cab5de295c717d35824cf92b9f322 (diff) | |
util: Optimise log2().
Diffstat (limited to 'src/gallium/auxiliary')
| -rw-r--r-- | src/gallium/auxiliary/util/u_math.h | 3 |
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 c7bbebc428..aee69ab7ba 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 |