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authorDamjan Marion <damarion@cisco.com>2016-10-28 22:35:17 +0200
committerDave Barach <openvpp@barachs.net>2016-10-31 16:40:30 +0000
commitc967a8239d98830e0b889bf9a621581a38a71dd8 (patch)
treedaa391caa510080134cfd137126776c15e948cdf /vppinfra
parentff7d642f3db5302e1fe70b6f1b9afdb4c63fa1d8 (diff)
vppinfra: use 64-bit crc32 instruction in bihash_24_8
Change-Id: Ibeb6d35e15a8d332753df7c352c0b51c277a0ee5 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'vppinfra')
-rw-r--r--vppinfra/vppinfra/bihash_24_8.h28
1 files changed, 5 insertions, 23 deletions
diff --git a/vppinfra/vppinfra/bihash_24_8.h b/vppinfra/vppinfra/bihash_24_8.h
index 17e99bf8aa8..353f06bf11f 100644
--- a/vppinfra/vppinfra/bihash_24_8.h
+++ b/vppinfra/vppinfra/bihash_24_8.h
@@ -40,38 +40,20 @@ clib_bihash_is_free_24_8 (const clib_bihash_kv_24_8_t * v)
return 0;
}
-#if __SSE4_2__
-static inline u32
-crc_u32 (u32 data, u32 value)
-{
- __asm__ volatile ("crc32l %[data], %[value];":[value] "+r" (value):[data]
- "rm" (data));
- return value;
-}
-
static inline u64
clib_bihash_hash_24_8 (const clib_bihash_kv_24_8_t * v)
{
- const u32 *dp = (const u32 *) &v->key[0];
+#if __SSE4_2__
u32 value = 0;
-
- value = crc_u32 (dp[0], value);
- value = crc_u32 (dp[1], value);
- value = crc_u32 (dp[2], value);
- value = crc_u32 (dp[3], value);
- value = crc_u32 (dp[4], value);
- value = crc_u32 (dp[5], value);
-
+ value = _mm_crc32_u64 (value, v->key[0]);
+ value = _mm_crc32_u64 (value, v->key[1]);
+ value = _mm_crc32_u64 (value, v->key[2]);
return value;
-}
#else
-static inline u64
-clib_bihash_hash_24_8 (const clib_bihash_kv_24_8_t * v)
-{
u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2];
return clib_xxhash (tmp);
-}
#endif
+}
static inline u8 *
format_bihash_kvp_24_8 (u8 * s, va_list * args)