On 13.04.2016 20:35, Bas Nieuwenhuizen wrote:
For use by radeonsi.Signed-off-by: Bas Nieuwenhuizen <b...@basnieuwenhuizen.nl> --- src/gallium/auxiliary/util/u_math.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h index b4ac0db..3a468e4 100644 --- a/src/gallium/auxiliary/util/u_math.h +++ b/src/gallium/auxiliary/util/u_math.h @@ -523,6 +523,14 @@ u_bit_scan_consecutive_range(unsigned *mask, int *start, int *count) *mask &= ~(((1 << *count) - 1) << *start); } +static inline void +u_bit_scan_consecutive_range64(uint64_t *mask, int *start, int *count) +{ + *start = ffsll(*mask) - 1; + *count = ffsll(~(*mask >> *start)) - 1; + *mask &= ~(((1llu << *count) - 1) << *start); +} +
I don't think this does the right thing when *mask is ~0llu: *start will be 0 (correct), *count will be -1, and *mask will most likely be undefined.
Thanks, Nicolai
/** * Return float bits. */
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