FD.io VPP  v19.08.3-2-gbabecb413
Vector Packet Processing
bihash_40_8.h
Go to the documentation of this file.
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 
21 #define BIHASH_TYPE _40_8
22 #define BIHASH_KVP_PER_PAGE 4
23 
24 #ifndef __included_bihash_40_8_h__
25 #define __included_bihash_40_8_h__
26 
27 #include <vppinfra/crc32.h>
28 #include <vppinfra/heap.h>
29 #include <vppinfra/format.h>
30 #include <vppinfra/pool.h>
31 #include <vppinfra/xxhash.h>
32 
33 typedef struct
34 {
35  u64 key[5];
38 
39 static inline int
41 {
42  /* Free values are clib_memset to 0xff, check a bit... */
43  if (v->key[0] == ~0ULL && v->value == ~0ULL)
44  return 1;
45  return 0;
46 }
47 
48 static inline u64
50 {
51 #ifdef clib_crc32c_uses_intrinsics
52  return clib_crc32c ((u8 *) v->key, 40);
53 #else
54  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2] ^ v->key[3] ^ v->key[4];
55  return clib_xxhash (tmp);
56 #endif
57 }
58 
59 static inline u8 *
60 format_bihash_kvp_40_8 (u8 * s, va_list * args)
61 {
62  clib_bihash_kv_40_8_t *v = va_arg (*args, clib_bihash_kv_40_8_t *);
63 
64  s = format (s, "key %llu %llu %llu %llu %llu value %llu", v->key[0],
65  v->key[1], v->key[2], v->key[3], v->key[4], v->value);
66  return s;
67 }
68 
69 static inline int
71 {
72 #if defined (CLIB_HAVE_VEC512)
73  u64x8 v;
74  v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
75  return (u64x8_is_zero_mask (v) & 0x1f) == 0;
76 #elif defined (CLIB_HAVE_VEC256)
77  u64x4 v = { a[4] ^ b[4], 0, 0, 0 };
78  v |= u64x4_load_unaligned (a) ^ u64x4_load_unaligned (b);
79  return u64x4_is_all_zero (v);
80 #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
81  u64x2 v = { a[4] ^ b[4], 0 };
82  v |= u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
83  v |= u64x2_load_unaligned (a + 2) ^ u64x2_load_unaligned (b + 2);
84  return u64x2_is_all_zero (v);
85 #else
86  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3])
87  | (a[4] ^ b[4])) == 0;
88 #endif
89 }
90 
91 #undef __included_bihash_template_h__
93 
94 #endif /* __included_bihash_40_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: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:40
epu8_epi32 epu16_epi32 u64x2
Definition: vector_sse42.h:674
static u64 clib_bihash_hash_40_8(const clib_bihash_kv_40_8_t *v)
Definition: bihash_40_8.h:49
static int clib_bihash_key_compare_40_8(u64 *a, u64 *b)
Definition: bihash_40_8.h:70
static u8 * format_bihash_kvp_40_8(u8 *s, va_list *args)
Definition: bihash_40_8.h:60
typedef key
Definition: ipsec.api:247
u64x4
Definition: vector_avx2.h:121