FD.io VPP  v17.04.2-2-ga8f93f8
Vector Packet Processing
bihash_24_8.h
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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 
17 #define BIHASH_TYPE _24_8
18 #define BIHASH_KVP_PER_PAGE 4
19 
20 #ifndef __included_bihash_24_8_h__
21 #define __included_bihash_24_8_h__
22 
23 #include <vppinfra/heap.h>
24 #include <vppinfra/format.h>
25 #include <vppinfra/pool.h>
26 #include <vppinfra/xxhash.h>
27 
28 typedef struct
29 {
30  u64 key[3];
33 
34 static inline int
36 {
37  /* Free values are memset to 0xff, check a bit... */
38  if (v->key[0] == ~0ULL && v->value == ~0ULL)
39  return 1;
40  return 0;
41 }
42 
43 static inline u64
45 {
46 #if __SSE4_2__
47  u32 value = 0;
48  value = _mm_crc32_u64 (value, v->key[0]);
49  value = _mm_crc32_u64 (value, v->key[1]);
50  value = _mm_crc32_u64 (value, v->key[2]);
51  return value;
52 #else
53  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2];
54  return clib_xxhash (tmp);
55 #endif
56 }
57 
58 static inline u8 *
59 format_bihash_kvp_24_8 (u8 * s, va_list * args)
60 {
61  clib_bihash_kv_24_8_t *v = va_arg (*args, clib_bihash_kv_24_8_t *);
62 
63  s = format (s, "key %llu %llu %llu value %llu",
64  v->key[0], v->key[1], v->key[2], v->value);
65  return s;
66 }
67 
68 static inline int
69 clib_bihash_key_compare_24_8 (const u64 * a, const u64 * b)
70 {
71  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) == 0;
72 }
73 
74 #undef __included_bihash_template_h__
76 
77 #endif /* __included_bihash_24_8_h__ */
78 
79 /*
80  * fd.io coding-style-patch-verification: ON
81  *
82  * Local Variables:
83  * eval: (c-set-style "gnu")
84  * End:
85  */
a
Definition: bitmap.h:516
Fixed length block allocator.
static u64 clib_xxhash(u64 key)
Definition: xxhash.h:58
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:418
static u64 clib_bihash_hash_24_8(const clib_bihash_kv_24_8_t *v)
Definition: bihash_24_8.h:44
static int clib_bihash_is_free_24_8(const clib_bihash_kv_24_8_t *v)
Definition: bihash_24_8.h:35
unsigned long u64
Definition: types.h:89
#define v
Definition: acl.c:246
unsigned int u32
Definition: types.h:88
static u8 * format_bihash_kvp_24_8(u8 *s, va_list *args)
Definition: bihash_24_8.h:59
unsigned char u8
Definition: types.h:56
static int clib_bihash_key_compare_24_8(const u64 *a, const u64 *b)
Definition: bihash_24_8.h:69