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/vnet/l2 | |
| 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/vnet/l2')
| -rw-r--r-- | src/vnet/l2/feat_bitmap.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/vnet/l2/feat_bitmap.h b/src/vnet/l2/feat_bitmap.h index 5940ff7ea9b..a1b295ac4ac 100644 --- a/src/vnet/l2/feat_bitmap.h +++ b/src/vnet/l2/feat_bitmap.h @@ -80,7 +80,7 @@ feat_bitmap_get_next_node_index (u32 * next_nodes, u32 bitmap) { u32 first_bit; - count_leading_zeros (first_bit, bitmap); + first_bit = count_leading_zeros (bitmap); first_bit = uword_bits - 1 - first_bit; return next_nodes[first_bit]; } |