From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yerden Zhumabekov Subject: [PATCH v3 2/5] hash: add new rte_hash_crc_8byte call Date: Tue, 18 Nov 2014 09:21:55 +0600 Message-ID: References: <1416160760-16087-1-git-send-email-e_zhumabekov@sts.kz> Mime-Version: 1.0 Content-Type: text/plain To: Return-path: In-Reply-To: List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org Sender: "dev" SSE4.2 provides _mm_crc32_u64 intrinsic with 8-byte operand. Signed-off-by: Yerden Zhumabekov --- lib/librte_hash/rte_hash_crc.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/lib/librte_hash/rte_hash_crc.h b/lib/librte_hash/rte_hash_crc.h index 4d7532a..15f687a 100644 --- a/lib/librte_hash/rte_hash_crc.h +++ b/lib/librte_hash/rte_hash_crc.h @@ -380,6 +380,22 @@ rte_hash_crc_4byte(uint32_t data, uint32_t init_val) } /** + * Use single crc32 instruction to perform a hash on a 8 byte value. + * + * @param data + * Data to perform hash on. + * @param init_val + * Value to initialise hash generator. + * @return + * 32bit calculated hash value. + */ +static inline uint32_t +rte_hash_crc_8byte(uint64_t data, uint32_t init_val) +{ + return _mm_crc32_u64(init_val, data); +} + +/** * Use crc32 instruction to perform a hash. * * @param data -- 1.7.9.5