[PATCH 5/5] ipfrag: use accelerated crc on riscv

[Daniel Gregory]

When the RISC-V Zbc (carryless multiplication) extension is present, an
implementation of CRC hashing using hardware instructions is available.
Use it rather than jhash.

Signed-off-by: Daniel Gregory <daniel.greg...@bytedance.com>
---
 lib/ip_frag/ip_frag_internal.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/ip_frag/ip_frag_internal.c b/lib/ip_frag/ip_frag_internal.c
index 7cbef647df..7806264078 100644
--- a/lib/ip_frag/ip_frag_internal.c
+++ b/lib/ip_frag/ip_frag_internal.c
@@ -45,14 +45,14 @@ ipv4_frag_hash(const struct ip_frag_key *key, uint32_t *v1, 
uint32_t *v2)
 
        p = (const uint32_t *)&key->src_dst;
 
-#if defined(RTE_ARCH_X86) || defined(RTE_ARCH_ARM64)
+#if defined(RTE_ARCH_X86) || defined(RTE_ARCH_ARM64) || defined(RTE_RISCV_ZBC)
        v = rte_hash_crc_4byte(p[0], PRIME_VALUE);
        v = rte_hash_crc_4byte(p[1], v);
        v = rte_hash_crc_4byte(key->id, v);
 #else
 
        v = rte_jhash_3words(p[0], p[1], key->id, PRIME_VALUE);
-#endif /* RTE_ARCH_X86 */
+#endif /* RTE_ARCH_X86 || RTE_ARCH_ARM64 || RTE_RISCV_ZBC */
 
        *v1 =  v;
        *v2 = (v << 7) + (v >> 14);
@@ -66,7 +66,7 @@ ipv6_frag_hash(const struct ip_frag_key *key, uint32_t *v1, 
uint32_t *v2)
 
        p = (const uint32_t *) &key->src_dst;
 
-#if defined(RTE_ARCH_X86) || defined(RTE_ARCH_ARM64)
+#if defined(RTE_ARCH_X86) || defined(RTE_ARCH_ARM64) || defined(RTE_RISCV_ZBC)
        v = rte_hash_crc_4byte(p[0], PRIME_VALUE);
        v = rte_hash_crc_4byte(p[1], v);
        v = rte_hash_crc_4byte(p[2], v);
-- 
2.39.2