diff options
| author |   Damjan Marion <damarion@cisco.com> | 2018-06-26 01:29:55 +0200 |
|---|---|---|
| committer | Damjan Marion <damarion@cisco.com> | 2018-06-26 12:08:02 +0200 |
| commit | 32ab95426d40920c526f0de89a43f88819616ed8 (patch) | |
| tree | 303d87264698840a822b5c0fd2fb40b6bf256670 /src | |
| parent | 0131b6c438e1e7ccc41c9abd1f02ac398d34dfaa (diff) | |
SIMD optimized linear search in clib_bitmap_first_set
Change-Id: Ib3a55598a83cc99485b40e38e7c406ecb126fd42
Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/vppinfra/bitmap.h | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/src/vppinfra/bitmap.h b/src/vppinfra/bitmap.h index dbf9eeb2232..9418b1fcced 100644 --- a/src/vppinfra/bitmap.h +++ b/src/vppinfra/bitmap.h @@ -384,8 +384,29 @@ do { \ always_inline uword clib_bitmap_first_set (uword * ai) { - uword i; - for (i = 0; i < vec_len (ai); i++) + uword i = 0; +#if uword_bits == 64 +#if defined (CLIB_HAVE_VEC256) + while (i + 7 < vec_len (ai)) + { + u64x4 v; + v = u64x4_load_unaligned (ai + i) | u64x4_load_unaligned (ai + i + 4); + if (!u64x4_is_all_zero (v)) + break; + i += 8; + } +#elif defined (CLIB_HAVE_VEC128) + while (i + 3 < vec_len (ai)) + { + u64x2 v; + v = u64x2_load_unaligned (ai + i) | u64x2_load_unaligned (ai + i + 2); + if (!u64x2_is_all_zero (v)) + break; + i += 4; + } +#endif +#endif + for (; i < vec_len (ai); i++) { uword x = ai[i]; if (x != 0) |