rte_member_x86.h

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2017 Intel Corporation
 */
 
#ifndef _RTE_MEMBER_X86_H_
#define _RTE_MEMBER_X86_H_
 
#include <x86intrin.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#if defined(__AVX2__)
 
static inline int
update_entry_search_avx(uint32_t bucket_id, member_sig_t tmp_sig,
        struct member_ht_bucket *buckets,
        member_set_t set_id)
{
    uint32_t hitmask = _mm256_movemask_epi8((__m256i)_mm256_cmpeq_epi16(
        _mm256_load_si256((__m256i const *)buckets[bucket_id].sigs),
        _mm256_set1_epi16(tmp_sig)));
    if (hitmask) {
        uint32_t hit_idx = rte_ctz32(hitmask) >> 1;
        buckets[bucket_id].sets[hit_idx] = set_id;
        return 1;
    }
    return 0;
}
 
static inline int
search_bucket_single_avx(uint32_t bucket_id, member_sig_t tmp_sig,
        struct member_ht_bucket *buckets,
        member_set_t *set_id)
{
    uint32_t hitmask = _mm256_movemask_epi8((__m256i)_mm256_cmpeq_epi16(
        _mm256_load_si256((__m256i const *)buckets[bucket_id].sigs),
        _mm256_set1_epi16(tmp_sig)));
    while (hitmask) {
        uint32_t hit_idx = rte_ctz32(hitmask) >> 1;
        if (buckets[bucket_id].sets[hit_idx] != RTE_MEMBER_NO_MATCH) {
            *set_id = buckets[bucket_id].sets[hit_idx];
            return 1;
        }
        hitmask &= ~(3U << ((hit_idx) << 1));
    }
    return 0;
}
 
static inline void
search_bucket_multi_avx(uint32_t bucket_id, member_sig_t tmp_sig,
                struct member_ht_bucket *buckets,
                uint32_t *counter,
                uint32_t match_per_key,
                member_set_t *set_id)
{
    uint32_t hitmask = _mm256_movemask_epi8((__m256i)_mm256_cmpeq_epi16(
        _mm256_load_si256((__m256i const *)buckets[bucket_id].sigs),
        _mm256_set1_epi16(tmp_sig)));
    while (hitmask) {
        uint32_t hit_idx = rte_ctz32(hitmask) >> 1;
        if (buckets[bucket_id].sets[hit_idx] != RTE_MEMBER_NO_MATCH) {
            set_id[*counter] = buckets[bucket_id].sets[hit_idx];
            (*counter)++;
            if (*counter >= match_per_key)
                return;
        }
        hitmask &= ~(3U << ((hit_idx) << 1));
    }
}
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif /* _RTE_MEMBER_X86_H_ */