FD.io VPP  v17.07-30-g839fa73
Vector Packet Processing
bihash_40_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 _40_8
18 #define BIHASH_KVP_PER_PAGE 4
19 
20 #ifndef __included_bihash_40_8_h__
21 #define __included_bihash_40_8_h__
22 
23 #include <vppinfra/heap.h>
24 #include <vppinfra/format.h>
25 #include <vppinfra/pool.h>
26 #include <vppinfra/xxhash.h>
27 #include <vppinfra/crc32.h>
28 
29 typedef struct
30 {
31  u64 key[5];
34 
35 static inline int
37 {
38  /* Free values are memset to 0xff, check a bit... */
39  if (v->key[0] == ~0ULL && v->value == ~0ULL)
40  return 1;
41  return 0;
42 }
43 
44 static inline u64
46 {
47 #if __SSE4_2__
48  return clib_crc32c ((u8 *) v->key, 40);
49 #else
50  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2] ^ v->key[3] ^ v->key[4];
51  return clib_xxhash (tmp);
52 #endif
53 }
54 
55 static inline u8 *
56 format_bihash_kvp_40_8 (u8 * s, va_list * args)
57 {
58  clib_bihash_kv_40_8_t *v = va_arg (*args, clib_bihash_kv_40_8_t *);
59 
60  s = format (s, "key %llu %llu %llu %llu %llu value %llu",
61  v->key[0], v->key[1], v->key[2], v->key[3], v->key[4],
62  v->value);
63  return s;
64 }
65 
66 static inline int
67 clib_bihash_key_compare_40_8 (const u64 * a, const u64 * b)
68 {
69  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3]) |
70  (a[4] ^ b[4])) == 0;
71 }
72 
73 #undef __included_bihash_template_h__
75 
76 #endif /* __included_bihash_40_8_h__ */
77 
78 /*
79  * fd.io coding-style-patch-verification: ON
80  *
81  * Local Variables:
82  * eval: (c-set-style "gnu")
83  * End:
84  */
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:419
static int clib_bihash_key_compare_40_8(const u64 *a, const u64 *b)
Definition: bihash_40_8.h:67
static int clib_bihash_is_free_40_8(const clib_bihash_kv_40_8_t *v)
Definition: bihash_40_8.h:36
unsigned long u64
Definition: types.h:89
#define v
Definition: acl.c:320
static u64 clib_bihash_hash_40_8(const clib_bihash_kv_40_8_t *v)
Definition: bihash_40_8.h:45
static u8 * format_bihash_kvp_40_8(u8 *s, va_list *args)
Definition: bihash_40_8.h:56
unsigned char u8
Definition: types.h:56