diff options
| author | Brian <brian.paul@tungstengraphics.com> | 2008-11-10 20:15:28 -0700 |
|---|---|---|
| committer | Brian <brian.paul@tungstengraphics.com> | 2008-11-10 20:16:00 -0700 |
| commit | be1b8e5d6c6692010a3ec117035d9b218929e2b3 (patch) | |
| tree | b21ff72555b2c3870036562924fa86c8042e53bc /src/mesa/main/imports.h | |
| parent | 8df4f6667f2892368791ae25505a996bc0edfacb (diff) | |
mesa: new _mesa_is_pow_two() function
Diffstat (limited to 'src/mesa/main/imports.h')
| -rw-r--r-- | src/mesa/main/imports.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h index 89d0662f79..453151ce0b 100644 --- a/src/mesa/main/imports.h +++ b/src/mesa/main/imports.h @@ -462,6 +462,16 @@ static INLINE int iceil(float f) #endif +/** + * Is x a power of two? + */ +static INLINE int +_mesa_is_pow_two(int x) +{ + return !(x & (x - 1)); +} + + /*** *** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255] *** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255] |