diff options
| author |   Damjan Marion <damarion@cisco.com> | 2018-05-10 13:40:44 +0200 |
|---|---|---|
| committer |   Dave Barach <openvpp@barachs.net> | 2018-05-10 17:16:56 +0000 |
| commit | 1105600416e0560cb05120a22e0a2e7359a13665 (patch) | |
| tree | acf1df08de42344c380473d81886864e662890cf /src/vppinfra/bitmap.h | |
| parent | 132dc49ee847a3e3b644de8b36499d73e8a8d37e (diff) | |
vppinfra: use count_trailing_zeros in sparse_vec_index
It is much cheaper to use ctzll than to do shift,subtract and mask
in likely case when we are looking for 1st set bit in the uword.
Change-Id: I31954081571978878c7098bafad0c85a91755fa2
Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vppinfra/bitmap.h')
| -rw-r--r-- | src/vppinfra/bitmap.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/vppinfra/bitmap.h b/src/vppinfra/bitmap.h index 9e1ae493285..dbf9eeb2232 100644 --- a/src/vppinfra/bitmap.h +++ b/src/vppinfra/bitmap.h @@ -409,7 +409,7 @@ clib_bitmap_last_set (uword * ai) if (x != 0) { uword first_bit; - count_leading_zeros (first_bit, x); + first_bit = count_leading_zeros (x); return (i) * BITS (ai[0]) - first_bit - 1; } } |