1/*
2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15#undef BIHASH_TYPE
16#undef BIHASH_KVP_PER_PAGE
17#undef BIHASH_32_64_SVM
18#undef BIHASH_ENABLE_STATS
19#undef BIHASH_KVP_AT_BUCKET_LEVEL
20#undef BIHASH_LAZY_INSTANTIATE
21#undef BIHASH_BUCKET_PREFETCH_CACHE_LINES
22
23#define BIHASH_TYPE _24_8
24#define BIHASH_KVP_PER_PAGE 4
25#define BIHASH_KVP_AT_BUCKET_LEVEL 0
26#define BIHASH_LAZY_INSTANTIATE 1
27#define BIHASH_BUCKET_PREFETCH_CACHE_LINES 1
28
29#ifndef __included_bihash_24_8_h__
30#define __included_bihash_24_8_h__
31
32#include <vppinfra/crc32.h>
33#include <vppinfra/heap.h>
34#include <vppinfra/format.h>
35#include <vppinfra/pool.h>
36#include <vppinfra/xxhash.h>
37
38typedef struct
39{
40  u64 key[3];
41  u64 value;
42} clib_bihash_kv_24_8_t;
43
44static inline int
45clib_bihash_is_free_24_8 (const clib_bihash_kv_24_8_t * v)
46{
47  /* Free values are clib_memset to 0xff, check a bit... */
48  if (v->key[0] == ~0ULL && v->value == ~0ULL)
49    return 1;
50  return 0;
51}
52
53static inline u64
54clib_bihash_hash_24_8 (const clib_bihash_kv_24_8_t * v)
55{
56#ifdef clib_crc32c_uses_intrinsics
57  return clib_crc32c ((u8 *) v->key, 24);
58#else
59  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2];
60  return clib_xxhash (tmp);
61#endif
62}
63
64static inline u8 *
65format_bihash_kvp_24_8 (u8 * s, va_list * args)
66{
67  clib_bihash_kv_24_8_t *v = va_arg (*args, clib_bihash_kv_24_8_t *);
68
69  s = format (s, "key %llu %llu %llu value %llu",
70	      v->key[0], v->key[1], v->key[2], v->value);
71  return s;
72}
73
74static inline int
75clib_bihash_key_compare_24_8 (u64 * a, u64 * b)
76{
77#if defined (CLIB_HAVE_VEC512)
78  u64x8 v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
79  return (u64x8_is_zero_mask (v) & 0x7) == 0;
80#elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
81  u64x2 v = { a[2] ^ b[2], 0 };
82  v |= u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
83  return u64x2_is_all_zero (v);
84#else
85  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) == 0;
86#endif
87}
88
89#undef __included_bihash_template_h__
90#include <vppinfra/bihash_template.h>
91
92#endif /* __included_bihash_24_8_h__ */
93
94/*
95 * fd.io coding-style-patch-verification: ON
96 *
97 * Local Variables:
98 * eval: (c-set-style "gnu")
99 * End:
100 */
101