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Vector Packet Processing
bihash_40_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 
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_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 
30 #ifndef __included_bihash_40_8_h__
31 #define __included_bihash_40_8_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];
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 == ~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_8 (u8 * s, va_list * args)
67 {
68  clib_bihash_kv_40_8_t *v = va_arg (*args, clib_bihash_kv_40_8_t *);
69 
70  s = format (s, "key %llu %llu %llu %llu %llu value %llu", v->key[0],
71  v->key[1], v->key[2], v->key[3], v->key[4], v->value);
72  return s;
73 }
74 
75 static inline int
77 {
78 #if defined (CLIB_HAVE_VEC512)
79  u64x8 v;
80  v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
81  return (u64x8_is_zero_mask (v) & 0x1f) == 0;
82 #elif defined (CLIB_HAVE_VEC256)
83  u64x4 v = { a[4] ^ b[4], 0, 0, 0 };
84  v |= u64x4_load_unaligned (a) ^ u64x4_load_unaligned (b);
85  return u64x4_is_all_zero (v);
86 #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
87  u64x2 v = { a[4] ^ b[4], 0 };
88  v |= u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
89  v |= u64x2_load_unaligned (a + 2) ^ u64x2_load_unaligned (b + 2);
90  return u64x2_is_all_zero (v);
91 #else
92  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3])
93  | (a[4] ^ b[4])) == 0;
94 #endif
95 }
96 
97 #undef __included_bihash_template_h__
99 
100 #endif /* __included_bihash_40_8_h__ */
101 
102 /*
103  * fd.io coding-style-patch-verification: ON
104  *
105  * Local Variables:
106  * eval: (c-set-style "gnu")
107  * End:
108  */
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 int clib_bihash_is_free_40_8(const clib_bihash_kv_40_8_t *v)
Definition: bihash_40_8.h:46
epu8_epi32 epu16_epi32 u64x2
Definition: vector_sse42.h:683
static u64 clib_bihash_hash_40_8(const clib_bihash_kv_40_8_t *v)
Definition: bihash_40_8.h:55
static int clib_bihash_key_compare_40_8(u64 *a, u64 *b)
Definition: bihash_40_8.h:76
static u8 * format_bihash_kvp_40_8(u8 *s, va_list *args)
Definition: bihash_40_8.h:66
typedef key
Definition: ipsec_types.api:85
u64x4
Definition: vector_avx2.h:121