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Vector Packet Processing
bihash_8_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 _8_8
18 #define BIHASH_KVP_PER_PAGE 4
19 
20 #ifndef __included_bihash_8_8_h__
21 #define __included_bihash_8_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 #if __SSE4_2__
29 #include <x86intrin.h>
30 #endif
31 
32 /** 8 octet key, 8 octet key value pair */
33 typedef struct
34 {
35  u64 key; /**< the key */
36  u64 value; /**< the value */
38 
39 /** Decide if a clib_bihash_kv_8_8_t instance is free
40  @param v- pointer to the (key,value) pair
41 */
42 static inline int
44 {
45  if (v->key == ~0ULL && v->value == ~0ULL)
46  return 1;
47  return 0;
48 }
49 
50 /** Hash a clib_bihash_kv_8_8_t instance
51  @param v - pointer to the (key,value) pair, hash the key (only)
52 */
53 static inline u64
55 {
56 #if __SSE4_2__
57  return _mm_crc32_u64 (0, v->key);
58 #else
59  return clib_xxhash (v->key);
60 #endif
61 }
62 
63 /** Format a clib_bihash_kv_8_8_t instance
64  @param s - u8 * vector under construction
65  @param args (vararg) - the (key,value) pair to format
66  @return s - the u8 * vector under construction
67 */
68 static inline u8 *
69 format_bihash_kvp_8_8 (u8 * s, va_list * args)
70 {
71  clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *);
72 
73  s = format (s, "key %llu value %llu", v->key, v->value);
74  return s;
75 }
76 
77 /** Compare two clib_bihash_kv_8_8_t instances
78  @param a - first key
79  @param b - second key
80 */
81 static inline int
83 {
84  return a == b;
85 }
86 
87 #undef __included_bihash_template_h__
89 
90 #endif /* __included_bihash_8_8_h__ */
91 
92 /*
93  * fd.io coding-style-patch-verification: ON
94  *
95  * Local Variables:
96  * eval: (c-set-style "gnu")
97  * End:
98  */
a
Definition: bitmap.h:516
Fixed length block allocator.
static u64 clib_xxhash(u64 key)
Definition: xxhash.h:58
static int clib_bihash_is_free_8_8(clib_bihash_kv_8_8_t *v)
Decide if a clib_bihash_kv_8_8_t instance is free.
Definition: bihash_8_8.h:43
unsigned long u64
Definition: types.h:89
u64 key
the key
Definition: bihash_8_8.h:35
#define v
Definition: acl.c:314
u64 value
the value
Definition: bihash_8_8.h:36
8 octet key, 8 octet key value pair
Definition: bihash_8_8.h:33
static u8 * format_bihash_kvp_8_8(u8 *s, va_list *args)
Format a clib_bihash_kv_8_8_t instance.
Definition: bihash_8_8.h:69
static u64 clib_bihash_hash_8_8(clib_bihash_kv_8_8_t *v)
Hash a clib_bihash_kv_8_8_t instance.
Definition: bihash_8_8.h:54
unsigned char u8
Definition: types.h:56
static int clib_bihash_key_compare_8_8(u64 a, u64 b)
Compare two clib_bihash_kv_8_8_t instances.
Definition: bihash_8_8.h:82
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:418