053d093524
Type: improvement Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: Id28299a188feefa1899d835fd499f018af95d81b
129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
/*
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* Copyright (c) 2017 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#undef CLIB_CUCKOO_TYPE
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#define CLIB_CUCKOO_TYPE _16_8
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#define CLIB_CUCKOO_KVP_PER_BUCKET (4)
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#define CLIB_CUCKOO_LOG2_KVP_PER_BUCKET (2)
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#define CLIB_CUCKOO_BFS_MAX_STEPS (2000)
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#define CLIB_CUCKOO_BFS_MAX_PATH_LENGTH (8)
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#ifndef __included_cuckoo_16_8_h__
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#define __included_cuckoo_16_8_h__
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#include <vppinfra/heap.h>
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#include <vppinfra/format.h>
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#include <vppinfra/pool.h>
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#include <vppinfra/xxhash.h>
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#include <vppinfra/cuckoo_debug.h>
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#include <vppinfra/cuckoo_common.h>
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#undef CLIB_CUCKOO_OPTIMIZE_PREFETCH
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#undef CLIB_CUCKOO_OPTIMIZE_UNROLL
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#undef CLIB_CUCKOO_OPTIMIZE_USE_COUNT_LIMITS_SEARCH
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#define CLIB_CUCKOO_OPTIMIZE_PREFETCH 1
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#define CLIB_CUCKOO_OPTIMIZE_UNROLL 1
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#define CLIB_CUCKOO_OPTIMIZE_USE_COUNT_LIMITS_SEARCH 1
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#if __SSE4_2__ && !defined (__i386__)
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#include <x86intrin.h>
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#endif
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/** 8 octet key, 8 octet key value pair */
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typedef struct
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{
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u64 key[2]; /**< the key */
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u64 value; /**< the value */
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} clib_cuckoo_kv_16_8_t;
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/** Decide if a clib_cuckoo_kv_16_8_t instance is free
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@param v- pointer to the (key,value) pair
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*/
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always_inline int
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clib_cuckoo_kv_is_free_16_8 (const clib_cuckoo_kv_16_8_t * v)
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{
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if (v->key[0] == ~0ULL && v->value == ~0ULL)
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return 1;
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return 0;
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}
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always_inline void
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clib_cuckoo_kv_set_free_16_8 (clib_cuckoo_kv_16_8_t * v)
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{
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clib_memset (v, 0xff, sizeof (*v));
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}
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/** Format a clib_cuckoo_kv_16_8_t instance
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@param s - u8 * vector under construction
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@param args (vararg) - the (key,value) pair to format
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@return s - the u8 * vector under construction
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*/
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always_inline u8 *
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format_cuckoo_kvp_16_8 (u8 * s, va_list * args)
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{
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clib_cuckoo_kv_16_8_t *v = va_arg (*args, clib_cuckoo_kv_16_8_t *);
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if (clib_cuckoo_kv_is_free_16_8 (v))
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{
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s = format (s, " -- empty -- ");
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}
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else
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{
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s =
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format (s, "key %llu%llu value %llu", v->key[0], v->key[1], v->value);
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}
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return s;
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}
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always_inline u64
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clib_cuckoo_hash_16_8 (clib_cuckoo_kv_16_8_t * v)
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{
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#ifdef clib_crc32c_uses_intrinsics
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return clib_crc32c ((u8 *) v->key, 16);
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#else
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u64 tmp = v->key[0] ^ v->key[1];
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return clib_xxhash (tmp);
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#endif
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}
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/** Compare two clib_cuckoo_kv_16_8_t instances
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@param a - first key
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@param b - second key
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*/
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always_inline int
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clib_cuckoo_key_compare_16_8 (u64 * a, u64 * b)
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{
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#if defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
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u64x2 v;
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v = u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
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return u64x2_is_all_zero (v);
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#else
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return ((a[0] ^ b[0]) | (a[1] ^ b[1])) == 0;
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#endif
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}
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#undef __included_cuckoo_template_h__
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#include <vppinfra/cuckoo_template.h>
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#endif /* __included_cuckoo_16_8_h__ */
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
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