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Diffstat (limited to 'src/gallium/auxiliary/util/u_math.h')
| -rw-r--r-- | src/gallium/auxiliary/util/u_math.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h index d2eaa2e7f7..fdaec8df82 100644 --- a/src/gallium/auxiliary/util/u_math.h +++ b/src/gallium/auxiliary/util/u_math.h @@ -161,6 +161,12 @@ static INLINE float logf( float f ) return (float) log( (double) f ); } +static INLINE double log2( double x ) +{ + const double invln2 = 1.442695041; + return log( x ) * invln2; +} + #else /* Work-around an extra semi-colon in VS 2005 logf definition */ #ifdef logf |