From 383740d102769721f2da64c4d6666025b0543836 Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Tue, 11 Oct 2016 09:53:12 +0200 Subject: vppinfra: use crc32q instruction instead of xxhash in bihash_8_8 xxhash calculation takes 10 clock cycles on Haswell so it makes sense to use crc32q insutrction when available. Change-Id: Iab5e7d9c8ec0125626bbcd067e5dc30574c8febc Signed-off-by: Damjan Marion --- vppinfra/Makefile.am | 3 +++ vppinfra/vppinfra/bihash_8_8.h | 8 ++++++++ 2 files changed, 11 insertions(+) (limited to 'vppinfra') diff --git a/vppinfra/Makefile.am b/vppinfra/Makefile.am index 48a347e0..d0a023e2 100644 --- a/vppinfra/Makefile.am +++ b/vppinfra/Makefile.am @@ -224,6 +224,9 @@ nobase_include_HEADERS = \ CLIB_CORE = \ vppinfra/asm_x86.c \ vppinfra/backtrace.c \ + vppinfra/bihash_8_8.h \ + vppinfra/bihash_24_8.h \ + vppinfra/bihash_template.h \ vppinfra/cpu.c \ vppinfra/elf.c \ vppinfra/elog.c \ diff --git a/vppinfra/vppinfra/bihash_8_8.h b/vppinfra/vppinfra/bihash_8_8.h index 9b5da5a2..4087d4dd 100644 --- a/vppinfra/vppinfra/bihash_8_8.h +++ b/vppinfra/vppinfra/bihash_8_8.h @@ -25,6 +25,10 @@ #include #include +#if __SSE4_2__ +#include +#endif + /** 8 octet key, 8 octet key value pair */ typedef struct { @@ -49,7 +53,11 @@ clib_bihash_is_free_8_8 (clib_bihash_kv_8_8_t * v) static inline u64 clib_bihash_hash_8_8 (clib_bihash_kv_8_8_t * v) { +#if __SSE4_2__ + return _mm_crc32_u64 (v->key, 0); +#else return clib_xxhash (v->key); +#endif } /** Format a clib_bihash_kv_8_8_t instance -- cgit 1.2.3-korg