rte_member_x86.h

/*-
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 *   Copyright(c) 2017 Intel Corporation. All rights reserved.
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 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
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 *       from this software without specific prior written permission.
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 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 */

#ifndef _RTE_MEMBER_X86_H_
#define _RTE_MEMBER_X86_H_

#ifdef __cplusplus
extern "C" {
#endif

#include <x86intrin.h>

#if defined(RTE_MACHINE_CPUFLAG_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 = __builtin_ctzl(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 = __builtin_ctzl(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 = __builtin_ctzl(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_ */