diff options
Diffstat (limited to 'src/gallium/auxiliary/util/u_math.h')
| -rw-r--r-- | src/gallium/auxiliary/util/u_math.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h index b0807c1339..b12c97dfb4 100644 --- a/src/gallium/auxiliary/util/u_math.h +++ b/src/gallium/auxiliary/util/u_math.h @@ -341,6 +341,16 @@ util_is_inf_or_nan(float x) /** + * Test whether x is a power of two. + */ +static INLINE boolean +util_is_pot(unsigned x) +{ + return (x & (x - 1)) == 0; +} + + +/** * Find first bit set in word. Least significant bit is 1. * Return 0 if no bits set. */ @@ -374,6 +384,10 @@ unsigned ffs( unsigned u ) #define ffs __builtin_ffs #endif +#ifdef __MINGW32__ +#define ffs __builtin_ffs +#endif + /* Could also binary search for the highest bit. */ |