369991d997
Replace the BSD license header with the SPDX tag for files with only an Intel copyright on them. Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2016-2017 Intel Corporation
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*/
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/* rte_efd_x86.h
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* This file holds all x86 specific EFD functions
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*/
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#include <immintrin.h>
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#if (RTE_EFD_VALUE_NUM_BITS == 8 || RTE_EFD_VALUE_NUM_BITS == 16 || \
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RTE_EFD_VALUE_NUM_BITS == 24 || RTE_EFD_VALUE_NUM_BITS == 32)
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#define EFD_LOAD_SI128(val) _mm_load_si128(val)
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#else
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#define EFD_LOAD_SI128(val) _mm_lddqu_si128(val)
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#endif
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static inline efd_value_t
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efd_lookup_internal_avx2(const efd_hashfunc_t *group_hash_idx,
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const efd_lookuptbl_t *group_lookup_table,
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const uint32_t hash_val_a, const uint32_t hash_val_b)
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{
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#ifdef RTE_MACHINE_CPUFLAG_AVX2
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efd_value_t value = 0;
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uint32_t i = 0;
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__m256i vhash_val_a = _mm256_set1_epi32(hash_val_a);
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__m256i vhash_val_b = _mm256_set1_epi32(hash_val_b);
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for (; i < RTE_EFD_VALUE_NUM_BITS; i += 8) {
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__m256i vhash_idx =
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_mm256_cvtepu16_epi32(EFD_LOAD_SI128(
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(__m128i const *) &group_hash_idx[i]));
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__m256i vlookup_table = _mm256_cvtepu16_epi32(
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EFD_LOAD_SI128((__m128i const *)
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&group_lookup_table[i]));
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__m256i vhash = _mm256_add_epi32(vhash_val_a,
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_mm256_mullo_epi32(vhash_idx, vhash_val_b));
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__m256i vbucket_idx = _mm256_srli_epi32(vhash,
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EFD_LOOKUPTBL_SHIFT);
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__m256i vresult = _mm256_srlv_epi32(vlookup_table,
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vbucket_idx);
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value |= (_mm256_movemask_ps(
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(__m256) _mm256_slli_epi32(vresult, 31))
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& ((1 << (RTE_EFD_VALUE_NUM_BITS - i)) - 1)) << i;
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}
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return value;
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#else
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RTE_SET_USED(group_hash_idx);
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RTE_SET_USED(group_lookup_table);
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RTE_SET_USED(hash_val_a);
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RTE_SET_USED(hash_val_b);
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/* Return dummy value, only to avoid compilation breakage */
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return 0;
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#endif
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}
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