fd1fa9bddd
Hash library uses optimized compare functions that use
x86 intrinsics, therefore non-x86 systems could not build
the library. In that case, the compare function is set
to the generic memcmp.
Fixes: 48a3991196 ("hash: replace with cuckoo hash implementation")
Reported-by: Zhigang Lu <zlu@ezchip.com>
Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Zhigang Lu <zlu@ezchip.com>
110 lines
3.9 KiB
C
110 lines
3.9 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2015 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* Functions to compare multiple of 16 byte keys (up to 128 bytes) */
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static int
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rte_hash_k16_cmp_eq(const void *key1, const void *key2, size_t key_len __rte_unused)
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{
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const __m128i k1 = _mm_loadu_si128((const __m128i *) key1);
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const __m128i k2 = _mm_loadu_si128((const __m128i *) key2);
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#ifdef RTE_MACHINE_CPUFLAG_SSE4_1
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const __m128i x = _mm_xor_si128(k1, k2);
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return !_mm_test_all_zeros(x, x);
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#else
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const __m128i x = _mm_cmpeq_epi32(k1, k2);
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return (_mm_movemask_epi8(x) != 0xffff);
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#endif
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}
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static int
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rte_hash_k32_cmp_eq(const void *key1, const void *key2, size_t key_len)
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{
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return rte_hash_k16_cmp_eq(key1, key2, key_len) ||
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rte_hash_k16_cmp_eq((const char *) key1 + 16,
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(const char *) key2 + 16, key_len);
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}
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static int
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rte_hash_k48_cmp_eq(const void *key1, const void *key2, size_t key_len)
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{
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return rte_hash_k16_cmp_eq(key1, key2, key_len) ||
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rte_hash_k16_cmp_eq((const char *) key1 + 16,
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(const char *) key2 + 16, key_len) ||
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rte_hash_k16_cmp_eq((const char *) key1 + 32,
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(const char *) key2 + 32, key_len);
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}
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static int
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rte_hash_k64_cmp_eq(const void *key1, const void *key2, size_t key_len)
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{
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return rte_hash_k32_cmp_eq(key1, key2, key_len) ||
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rte_hash_k32_cmp_eq((const char *) key1 + 32,
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(const char *) key2 + 32, key_len);
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}
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static int
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rte_hash_k80_cmp_eq(const void *key1, const void *key2, size_t key_len)
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{
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return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
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rte_hash_k16_cmp_eq((const char *) key1 + 64,
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(const char *) key2 + 64, key_len);
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}
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static int
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rte_hash_k96_cmp_eq(const void *key1, const void *key2, size_t key_len)
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{
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return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
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rte_hash_k32_cmp_eq((const char *) key1 + 64,
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(const char *) key2 + 64, key_len);
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}
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static int
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rte_hash_k112_cmp_eq(const void *key1, const void *key2, size_t key_len)
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{
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return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
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rte_hash_k32_cmp_eq((const char *) key1 + 64,
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(const char *) key2 + 64, key_len) ||
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rte_hash_k16_cmp_eq((const char *) key1 + 96,
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(const char *) key2 + 96, key_len);
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}
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static int
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rte_hash_k128_cmp_eq(const void *key1, const void *key2, size_t key_len)
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{
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return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
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rte_hash_k64_cmp_eq((const char *) key1 + 64,
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(const char *) key2 + 64, key_len);
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}
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