From: Yerden Zhumabekov <e_zhumabekov@sts.kz>
Date: Thu, 29 Jan 2015 08:49:47 +0000 (+0600)
Subject: hash: add CRC function for 8 bytes
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=d2b989045f9bb0dcbf138a4e13130c41adbf71cf;p=dpdk.git

hash: add CRC function for 8 bytes

SSE4.2 provides CRC32 intrinsic with 8-byte operand.

Signed-off-by: Yerden Zhumabekov <e_zhumabekov@sts.kz>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
---

diff --git a/lib/librte_hash/rte_hash_crc.h b/lib/librte_hash/rte_hash_crc.h
index 45b0dcedfa..6cc67cd122 100644
--- a/lib/librte_hash/rte_hash_crc.h
+++ b/lib/librte_hash/rte_hash_crc.h
@@ -412,6 +412,22 @@ rte_hash_crc_4byte(uint32_t data, uint32_t init_val)
 	return crc32c_sse42_u32(data, 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 crc32c_sse42_u64(data, init_val);
+}
+
 /**
  * Use crc32 instruction to perform a hash.
  *