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Vector Packet Processing
bihash_16_8.h
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1 /*
2  * Copyright (c) 2016 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 _16_8
18 #define BIHASH_KVP_PER_PAGE 4
19 
20 #ifndef __included_bihash_16_8_h__
21 #define __included_bihash_16_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[2];
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 #if __SSE4_2__
44 #ifndef __defined_crc_u32__
45 #define __defined_crc_u32__
46 static inline u32
47 crc_u32 (u32 data, u32 value)
48 {
49  __asm__ volatile ("crc32l %[data], %[value];":[value] "+r" (value):[data]
50  "rm" (data));
51  return value;
52 }
53 #endif /* __defined_crc_u32__ */
54 
55 static inline u64
57 {
58  u32 *dp = (u32 *) & v->key[0];
59  u32 value = 0;
60 
61  value = crc_u32 (dp[0], value);
62  value = crc_u32 (dp[1], value);
63  value = crc_u32 (dp[2], value);
64  value = crc_u32 (dp[3], value);
65 
66  return value;
67 }
68 #else
69 static inline u64
71 {
72  u64 tmp = v->key[0] ^ v->key[1];
73  return clib_xxhash (tmp);
74 }
75 #endif
76 
77 static inline u8 *
78 format_bihash_kvp_16_8 (u8 * s, va_list * args)
79 {
80  clib_bihash_kv_16_8_t *v = va_arg (*args, clib_bihash_kv_16_8_t *);
81 
82  s = format (s, "key %llu %llu value %llu", v->key[0], v->key[1], v->value);
83  return s;
84 }
85 
86 static inline int
88 {
89  return ((a[0] ^ b[0]) | (a[1] ^ b[1])) == 0;
90 }
91 
92 #undef __included_bihash_template_h__
94 
95 #endif /* __included_bihash_16_8_h__ */
96 
97 /*
98  * fd.io coding-style-patch-verification: ON
99  *
100  * Local Variables:
101  * eval: (c-set-style "gnu")
102  * End:
103  */
a
Definition: bitmap.h:516
Fixed length block allocator.
static int clib_bihash_key_compare_16_8(u64 *a, u64 *b)
Definition: bihash_16_8.h:87
static u64 clib_xxhash(u64 key)
Definition: xxhash.h:58
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:418
static u32 crc_u32(u32 data, u32 value)
Definition: map.c:37
static int clib_bihash_is_free_16_8(clib_bihash_kv_16_8_t *v)
Definition: bihash_16_8.h:35
static u8 * format_bihash_kvp_16_8(u8 *s, va_list *args)
Definition: bihash_16_8.h:78
unsigned long u64
Definition: types.h:89
unsigned int u32
Definition: types.h:88
unsigned char u8
Definition: types.h:56
static u64 clib_bihash_hash_16_8(clib_bihash_kv_16_8_t *v)
Definition: bihash_16_8.h:70