FD.io VPP  v21.01.1
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 #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 #undef BIHASH_USE_HEAP
23 
24 #define BIHASH_TYPE _24_8
25 #define BIHASH_KVP_PER_PAGE 4
26 #define BIHASH_KVP_AT_BUCKET_LEVEL 0
27 #define BIHASH_LAZY_INSTANTIATE 1
28 #define BIHASH_BUCKET_PREFETCH_CACHE_LINES 1
29 #define BIHASH_USE_HEAP 1
30 
31 #ifndef __included_bihash_24_8_h__
32 #define __included_bihash_24_8_h__
33 
34 #include <vppinfra/crc32.h>
35 #include <vppinfra/heap.h>
36 #include <vppinfra/format.h>
37 #include <vppinfra/pool.h>
38 #include <vppinfra/xxhash.h>
39 
40 typedef struct
41 {
42  u64 key[3];
45 
46 static inline int
48 {
49  /* Free values are clib_memset to 0xff, check a bit... */
50  if (v->key[0] == ~0ULL && v->value == ~0ULL)
51  return 1;
52  return 0;
53 }
54 
55 static inline u64
57 {
58 #ifdef clib_crc32c_uses_intrinsics
59  return clib_crc32c ((u8 *) v->key, 24);
60 #else
61  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2];
62  return clib_xxhash (tmp);
63 #endif
64 }
65 
66 static inline u8 *
67 format_bihash_kvp_24_8 (u8 * s, va_list * args)
68 {
69  clib_bihash_kv_24_8_t *v = va_arg (*args, clib_bihash_kv_24_8_t *);
70 
71  s = format (s, "key %llu %llu %llu value %llu",
72  v->key[0], v->key[1], v->key[2], v->value);
73  return s;
74 }
75 
76 static inline int
78 {
79 #if defined (CLIB_HAVE_VEC512)
80  u64x8 v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
81  return (u64x8_is_zero_mask (v) & 0x7) == 0;
82 #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
83  u64x2 v = { a[2] ^ b[2], 0 };
84  v |= u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
85  return u64x2_is_all_zero (v);
86 #else
87  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) == 0;
88 #endif
89 }
90 
91 #undef __included_bihash_template_h__
93 
94 #endif /* __included_bihash_24_8_h__ */
95 
96 /*
97  * fd.io coding-style-patch-verification: ON
98  *
99  * Local Variables:
100  * eval: (c-set-style "gnu")
101  * End:
102  */
a
Definition: bitmap.h:544
unsigned long u64
Definition: types.h:89
Fixed length block allocator.
static u64 clib_xxhash(u64 key)
Definition: xxhash.h:58
unsigned char u8
Definition: types.h:56
static u64 clib_bihash_hash_24_8(const clib_bihash_kv_24_8_t *v)
Definition: bihash_24_8.h:56
static int clib_bihash_key_compare_24_8(u64 *a, u64 *b)
Definition: bihash_24_8.h:77
description fragment has unexpected format
Definition: map.api:433
static int clib_bihash_is_free_24_8(const clib_bihash_kv_24_8_t *v)
Definition: bihash_24_8.h:47
const cJSON *const b
Definition: cJSON.h:255
epu8_epi32 epu16_epi32 u64x2
Definition: vector_sse42.h:691
typedef key
Definition: ipsec_types.api:86
static u8 * format_bihash_kvp_24_8(u8 *s, va_list *args)
Definition: bihash_24_8.h:67