From af083e9fcc61fe5417a5c7f5561973eeebcc7222 Mon Sep 17 00:00:00 2001 From: Pablo de Lara Date: Thu, 16 Jul 2015 10:00:54 +0100 Subject: [PATCH] hash: fix build without SSE4.1 _mm_test_all_zeros is not available for CPUs with no SSE4.1, therefore, DPDK would not build. This patch adds an alternative for this, using _mm_cmpeq_epi32 and _mm_movemask_epi8. Fixes: 48a399119619 ("hash: replace with cuckoo hash implementation") Signed-off-by: Pablo de Lara --- lib/librte_hash/rte_cuckoo_hash.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/lib/librte_hash/rte_cuckoo_hash.c b/lib/librte_hash/rte_cuckoo_hash.c index 00ba3a3cb4..d9ba0665f7 100644 --- a/lib/librte_hash/rte_cuckoo_hash.c +++ b/lib/librte_hash/rte_cuckoo_hash.c @@ -1125,9 +1125,15 @@ rte_hash_k16_cmp_eq(const void *key1, const void *key2, size_t key_len __rte_unu { const __m128i k1 = _mm_loadu_si128((const __m128i *) key1); const __m128i k2 = _mm_loadu_si128((const __m128i *) key2); +#ifdef RTE_MACHINE_CPUFLAG_SSE4_1 const __m128i x = _mm_xor_si128(k1, k2); return !_mm_test_all_zeros(x, x); +#else + const __m128i x = _mm_cmpeq_epi32(k1, k2); + + return (_mm_movemask_epi8(x) != 0xffff); +#endif } static int -- 2.20.1