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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 
23 #define BIHASH_TYPE _24_8
24 #define BIHASH_KVP_PER_PAGE 4
25 #define BIHASH_KVP_AT_BUCKET_LEVEL 0
26 #define BIHASH_LAZY_INSTANTIATE 1
27 #define BIHASH_BUCKET_PREFETCH_CACHE_LINES 1
28 
29 #ifndef __included_bihash_24_8_h__
30 #define __included_bihash_24_8_h__
31 
32 #include <vppinfra/crc32.h>
33 #include <vppinfra/heap.h>
34 #include <vppinfra/format.h>
35 #include <vppinfra/pool.h>
36 #include <vppinfra/xxhash.h>
37 
38 typedef struct
39 {
40  u64 key[3];
43 
44 static inline int
46 {
47  /* Free values are clib_memset to 0xff, check a bit... */
48  if (v->key[0] == ~0ULL && v->value == ~0ULL)
49  return 1;
50  return 0;
51 }
52 
53 static inline u64
55 {
56 #ifdef clib_crc32c_uses_intrinsics
57  return clib_crc32c ((u8 *) v->key, 24);
58 #else
59  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2];
60  return clib_xxhash (tmp);
61 #endif
62 }
63 
64 static inline u8 *
65 format_bihash_kvp_24_8 (u8 * s, va_list * args)
66 {
67  clib_bihash_kv_24_8_t *v = va_arg (*args, clib_bihash_kv_24_8_t *);
68 
69  s = format (s, "key %llu %llu %llu value %llu",
70  v->key[0], v->key[1], v->key[2], v->value);
71  return s;
72 }
73 
74 static inline int
76 {
77 #if defined (CLIB_HAVE_VEC512)
78  u64x8 v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
79  return (u64x8_is_zero_mask (v) & 0x7) == 0;
80 #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
81  u64x2 v = { a[2] ^ b[2], 0 };
82  v |= u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
83  return u64x2_is_all_zero (v);
84 #else
85  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) == 0;
86 #endif
87 }
88 
89 #undef __included_bihash_template_h__
91 
92 #endif /* __included_bihash_24_8_h__ */
93 
94 /*
95  * fd.io coding-style-patch-verification: ON
96  *
97  * Local Variables:
98  * eval: (c-set-style "gnu")
99  * End:
100  */
a
Definition: bitmap.h:538
unsigned long u64
Definition: types.h:89
Fixed length block allocator.
static u64 clib_xxhash(u64 key)
Definition: xxhash.h:58
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
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:54
static int clib_bihash_key_compare_24_8(u64 *a, u64 *b)
Definition: bihash_24_8.h:75
static int clib_bihash_is_free_24_8(const clib_bihash_kv_24_8_t *v)
Definition: bihash_24_8.h:45
epu8_epi32 epu16_epi32 u64x2
Definition: vector_sse42.h:683
typedef key
Definition: ipsec_types.api:85
static u8 * format_bihash_kvp_24_8(u8 *s, va_list *args)
Definition: bihash_24_8.h:65