FD.io VPP  v18.07-rc0-415-g6c78436
Vector Packet Processing
bihash_48_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_CACHE_SIZE
18 #undef BIHASH_KVP_PER_PAGE
19 
20 #define BIHASH_TYPE _48_8
21 #define BIHASH_KVP_PER_PAGE 4
22 #define BIHASH_KVP_CACHE_SIZE 0
23 
24 #ifndef __included_bihash_48_8_h__
25 #define __included_bihash_48_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[6];
38 
39 static inline int
41 {
42  /* Free values are 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, 48);
53 #else
54  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2] ^ v->key[3] ^ v->key[4]
55  ^ v->key[5];
56  return clib_xxhash (tmp);
57 #endif
58 }
59 
60 static inline u8 *
61 format_bihash_kvp_48_8 (u8 * s, va_list * args)
62 {
63  clib_bihash_kv_48_8_t *v = va_arg (*args, clib_bihash_kv_48_8_t *);
64 
65  s = format (s, "key %llu %llu %llu %llu %llu %llu value %llu", v->key[0],
66  v->key[1], v->key[2], v->key[3], v->key[4], v->key[5],
67  v->value);
68  return s;
69 }
70 
71 static inline int
73 {
74 #if defined (CLIB_HAVE_VEC512)
75  u64x8 v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
76  return (u64x8_is_zero_mask (v) & 0x3f) == 0;
77 #elif defined (CLIB_HAVE_VEC256)
78  u64x4 v;
79  v = u64x4_load_unaligned (a) ^ u64x4_load_unaligned (b);
80  v |= u64x4_load_unaligned (a + 2) ^ u64x4_load_unaligned (b + 2);
81  return u64x4_is_all_zero (v);
82 #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
83  u64x2 v;
84  v = u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
85  v |= u64x2_load_unaligned (a + 2) ^ u64x2_load_unaligned (b + 2);
86  v |= u64x2_load_unaligned (a + 4) ^ u64x2_load_unaligned (b + 4);
87  return u64x2_is_all_zero (v);
88 #else
89  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3])
90  | (a[4] ^ b[4]) | (a[5] ^ b[5])) == 0;
91 #endif
92 }
93 
94 #undef __included_bihash_template_h__
96 
97 #endif /* __included_bihash_48_8_h__ */
98 
99 /*
100  * fd.io coding-style-patch-verification: ON
101  *
102  * Local Variables:
103  * eval: (c-set-style "gnu")
104  * End:
105  */
static u64 clib_bihash_hash_48_8(const clib_bihash_kv_48_8_t *v)
Definition: bihash_48_8.h:49
a
Definition: bitmap.h:537
unsigned long u64
Definition: types.h:89
Fixed length block allocator.
static int clib_bihash_key_compare_48_8(u64 *a, u64 *b)
Definition: bihash_48_8.h:72
static u64 clib_xxhash(u64 key)
Definition: xxhash.h:58
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
unsigned char u8
Definition: types.h:56
static u8 * format_bihash_kvp_48_8(u8 *s, va_list *args)
Definition: bihash_48_8.h:61
static int clib_bihash_is_free_48_8(const clib_bihash_kv_48_8_t *v)
Definition: bihash_48_8.h:40
static int u64x2_is_all_zero(u64x2 x)
Definition: vector_neon.h:43
#define v
Definition: acl.c:491
u64x4
Definition: vector_avx2.h:110