1/*
2 * Copyright (c) 2017 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 _vec8_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_vec8_8_h__
30#define __included_bihash_vec8_8_h__
31
32#include <vppinfra/heap.h>
33#include <vppinfra/format.h>
34#include <vppinfra/pool.h>
35#include <vppinfra/xxhash.h>
36#include <vppinfra/crc32.h>
37
38/** 8 octet key, 8 octet key value pair */
39typedef struct
40{
41  u64 key;			/**< the key */
42  u64 value;			/**< the value */
43} clib_bihash_kv_vec8_8_t;
44
45/** Decide if a clib_bihash_kv_vec8_8_t instance is free
46    @param v- pointer to the (key,value) pair
47*/
48static inline int
49clib_bihash_is_free_vec8_8 (clib_bihash_kv_vec8_8_t * v)
50{
51  if (v->key == ~0ULL && v->value == ~0ULL)
52    return 1;
53  return 0;
54}
55
56/** Hash a clib_bihash_kv_vec8_8_t instance
57    @param v - pointer to the (key,value) pair, hash the key (only)
58*/
59static inline u64
60clib_bihash_hash_vec8_8 (clib_bihash_kv_vec8_8_t * v)
61{
62  u8 *keyp = (u8 *) (v->key);
63  /* Note: to torture-test linear scan, make this fn return a constant */
64#ifdef clib_crc32c_uses_intrinsics
65  return clib_crc32c (keyp, vec_len (keyp));
66#else
67  {
68    int i, j;
69    u64 sum = 0;
70
71    for (i = 0, j = 0; i < vec_len (keyp); i++)
72      {
73	sum ^= keyp[i] << (j * 8);
74	j++;
75	if (j == 4)
76	  j = 0;
77      }
78
79    return clib_xxhash (sum);
80  }
81#endif
82}
83
84/** Format a clib_bihash_kv_vec8_8_t instance
85    @param s - u8 * vector under construction
86    @param args (vararg) - the (key,value) pair to format
87    @return s - the u8 * vector under construction
88*/
89static inline u8 *
90format_bihash_kvp_vec8_8 (u8 * s, va_list * args)
91{
92  clib_bihash_kv_vec8_8_t *v = va_arg (*args, clib_bihash_kv_vec8_8_t *);
93
94  s = format (s, "key %U value %llu",
95	      format_hex_bytes, v->key, vec_len ((u8 *) (v->key)), v->value);
96  return s;
97}
98
99/** Compare two clib_bihash_kv_vec8_8_t instances
100    @param a - first key
101    @param b - second key
102*/
103static inline int
104clib_bihash_key_compare_vec8_8 (u64 a_arg, u64 b_arg)
105{
106  u8 *a = (u8 *) a_arg;
107  u8 *b = (u8 *) b_arg;
108
109  if (a_arg == ~0ULL || b_arg == ~0ULL)
110    return 0;
111
112  if (vec_len (a) != vec_len (b))
113    return 0;
114
115  return memcmp (a, b, vec_len (a)) == 0;
116}
117
118#undef __included_bihash_template_h__
119#include <vppinfra/bihash_template.h>
120
121#endif /* __included_bihash_vec8_8_h__ */
122
123/*
124 * fd.io coding-style-patch-verification: ON
125 *
126 * Local Variables:
127 * eval: (c-set-style "gnu")
128 * End:
129 */
130