1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2016-2017 Intel Corporation 3 */ 4 5 /* rte_efd_x86.h 6 * This file holds all x86 specific EFD functions 7 */ 8 #include <immintrin.h> 9 10 #if (RTE_EFD_VALUE_NUM_BITS == 8 || RTE_EFD_VALUE_NUM_BITS == 16 || \ 11 RTE_EFD_VALUE_NUM_BITS == 24 || RTE_EFD_VALUE_NUM_BITS == 32) 12 #define EFD_LOAD_SI128(val) _mm_load_si128(val) 13 #else 14 #define EFD_LOAD_SI128(val) _mm_lddqu_si128(val) 15 #endif 16 17 static inline efd_value_t 18 efd_lookup_internal_avx2(const efd_hashfunc_t *group_hash_idx, 19 const efd_lookuptbl_t *group_lookup_table, 20 const uint32_t hash_val_a, const uint32_t hash_val_b) 21 { 22 #ifdef __AVX2__ 23 efd_value_t value = 0; 24 uint32_t i = 0; 25 __m256i vhash_val_a = _mm256_set1_epi32(hash_val_a); 26 __m256i vhash_val_b = _mm256_set1_epi32(hash_val_b); 27 28 for (; i < RTE_EFD_VALUE_NUM_BITS; i += 8) { 29 __m256i vhash_idx = 30 _mm256_cvtepu16_epi32(EFD_LOAD_SI128( 31 (__m128i const *) &group_hash_idx[i])); 32 __m256i vlookup_table = _mm256_cvtepu16_epi32( 33 EFD_LOAD_SI128((__m128i const *) 34 &group_lookup_table[i])); 35 __m256i vhash = _mm256_add_epi32(vhash_val_a, 36 _mm256_mullo_epi32(vhash_idx, vhash_val_b)); 37 __m256i vbucket_idx = _mm256_srli_epi32(vhash, 38 EFD_LOOKUPTBL_SHIFT); 39 __m256i vresult = _mm256_srlv_epi32(vlookup_table, 40 vbucket_idx); 41 42 value |= (_mm256_movemask_ps( 43 (__m256) _mm256_slli_epi32(vresult, 31)) 44 & ((1 << (RTE_EFD_VALUE_NUM_BITS - i)) - 1)) << i; 45 } 46 47 return value; 48 #else 49 RTE_SET_USED(group_hash_idx); 50 RTE_SET_USED(group_lookup_table); 51 RTE_SET_USED(hash_val_a); 52 RTE_SET_USED(hash_val_b); 53 /* Return dummy value, only to avoid compilation breakage */ 54 return 0; 55 #endif 56 57 } 58