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Vector Packet Processing
bihash_40_48.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 
16 #undef BIHASH_TYPE
17 #undef BIHASH_KVP_PER_PAGE
18 #undef BIHASH_32_64_SVM
19 #undef BIHASH_ENABLE_STATS
20 #undef BIHASH_KVP_AT_BUCKET_LEVEL
21 #undef BIHASH_LAZY_INSTANTIATE
22 #undef BIHASH_BUCKET_PREFETCH_CACHE_LINES
23 
24 #define BIHASH_TYPE _40_48
25 #define BIHASH_KVP_PER_PAGE 2
26 #define BIHASH_KVP_AT_BUCKET_LEVEL 1
27 #define BIHASH_LAZY_INSTANTIATE 1
28 #define BIHASH_BUCKET_PREFETCH_CACHE_LINES 2
29 
30 #ifndef __included_bihash_40_48_h__
31 #define __included_bihash_40_48_h__
32 
33 #include <vppinfra/crc32.h>
34 #include <vppinfra/heap.h>
35 #include <vppinfra/format.h>
36 #include <vppinfra/pool.h>
37 #include <vppinfra/xxhash.h>
38 
39 typedef struct
40 {
41  u64 key[5];
42  u64 value[6];
44 
45 static inline int
47 {
48  /* Free values are clib_memset to 0xff, check a bit... */
49  if (v->key[0] == ~0ULL && v->value[0] == ~0ULL)
50  return 1;
51  return 0;
52 }
53 
54 static inline u64
56 {
57 #ifdef clib_crc32c_uses_intrinsics
58  return clib_crc32c ((u8 *) v->key, 40);
59 #else
60  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2] ^ v->key[3] ^ v->key[4];
61  return clib_xxhash (tmp);
62 #endif
63 }
64 
65 static inline u8 *
66 format_bihash_kvp_40_48 (u8 * s, va_list * args)
67 {
68  clib_bihash_kv_40_48_t *v = va_arg (*args, clib_bihash_kv_40_48_t *);
69 
70  s =
71  format (s,
72  "key %llu %llu %llu %llu %llu value %llu %llu %llu %llu %llu %u",
73  v->key[0], v->key[1], v->key[2], v->key[3], v->key[4],
74  v->value[0], v->value[1], v->value[2], v->value[3], v->value[4],
75  v->value[5]);
76  return s;
77 }
78 
79 static inline int
81 {
82 #if defined (CLIB_HAVE_VEC512)
83  u64x8 v;
84  v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
85  return (u64x8_is_zero_mask (v) & 0x1f) == 0;
86 #elif defined (CLIB_HAVE_VEC256)
87  u64x4 v = { a[4] ^ b[4], 0, 0, 0 };
88  v |= u64x4_load_unaligned (a) ^ u64x4_load_unaligned (b);
89  return u64x4_is_all_zero (v);
90 #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
91  u64x2 v = { a[4] ^ b[4], 0 };
92  v |= u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
93  v |= u64x2_load_unaligned (a + 2) ^ u64x2_load_unaligned (b + 2);
94  return u64x2_is_all_zero (v);
95 #else
96  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3])
97  | (a[4] ^ b[4])) == 0;
98 #endif
99 }
100 
101 #undef __included_bihash_template_h__
103 
104 #endif /* __included_bihash_40_48_h__ */
105 
106 /*
107  * fd.io coding-style-patch-verification: ON
108  *
109  * Local Variables:
110  * eval: (c-set-style "gnu")
111  * End:
112  */
a
Definition: bitmap.h:538
unsigned long u64
Definition: types.h:89
Fixed length block allocator.
static u64 clib_bihash_hash_40_48(const clib_bihash_kv_40_48_t *v)
Definition: bihash_40_48.h:55
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
epu8_epi32 epu16_epi32 u64x2
Definition: vector_sse42.h:691
static int clib_bihash_key_compare_40_48(u64 *a, u64 *b)
Definition: bihash_40_48.h:80
static u8 * format_bihash_kvp_40_48(u8 *s, va_list *args)
Definition: bihash_40_48.h:66
u8 value
Definition: qos.api:54
static int clib_bihash_is_free_40_48(const clib_bihash_kv_40_48_t *v)
Definition: bihash_40_48.h:46
typedef key
Definition: ipsec_types.api:85
u64x4
Definition: vector_avx2.h:121