Module: Mesa Branch: master Commit: af4f5a7c97f3ab47bbd21aa7c27d0c0aaf01f959 URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=af4f5a7c97f3ab47bbd21aa7c27d0c0aaf01f959
Author: Marek Olšák <[email protected]> Date: Wed Sep 24 18:26:21 2014 +0200 gallium/util: add util_bitcount64 I'll need this in radeonsi. v2: use __builtin_popcountll if available Reviewed-by: Michel Dänzer <[email protected]> --- src/gallium/auxiliary/util/u_math.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h index 39bd40f..f95c111 100644 --- a/src/gallium/auxiliary/util/u_math.h +++ b/src/gallium/auxiliary/util/u_math.h @@ -727,6 +727,18 @@ util_bitcount(unsigned n) #endif } + +static INLINE unsigned +util_bitcount64(uint64_t n) +{ +#ifdef HAVE___BUILTIN_POPCOUNTLL + return __builtin_popcountll(n); +#else + return util_bitcount(n) + util_bitcount(n >> 32); +#endif +} + + /** * Reverse bits in n * Algorithm taken from: _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
