FD.io VPP  v19.01.3-6-g70449b9b9
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 
19 #define BIHASH_TYPE _40_8
20 #define BIHASH_KVP_PER_PAGE 4
21 
22 #ifndef __included_bihash_40_8_h__
23 #define __included_bihash_40_8_h__
24 
25 #include <vppinfra/crc32.h>
26 #include <vppinfra/heap.h>
27 #include <vppinfra/format.h>
28 #include <vppinfra/pool.h>
29 #include <vppinfra/xxhash.h>
30 
31 typedef struct
32 {
33  u64 key[5];
36 
37 static inline int
39 {
40  /* Free values are clib_memset to 0xff, check a bit... */
41  if (v->key[0] == ~0ULL && v->value == ~0ULL)
42  return 1;
43  return 0;
44 }
45 
46 static inline u64
48 {
49 #ifdef clib_crc32c_uses_intrinsics
50  return clib_crc32c ((u8 *) v->key, 40);
51 #else
52  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2] ^ v->key[3] ^ v->key[4];
53  return clib_xxhash (tmp);
54 #endif
55 }
56 
57 static inline u8 *
58 format_bihash_kvp_40_8 (u8 * s, va_list * args)
59 {
60  clib_bihash_kv_40_8_t *v = va_arg (*args, clib_bihash_kv_40_8_t *);
61 
62  s = format (s, "key %llu %llu %llu %llu %llu value %llu", v->key[0],
63  v->key[1], v->key[2], v->key[3], v->key[4], v->value);
64  return s;
65 }
66 
67 static inline int
69 {
70 #if defined (CLIB_HAVE_VEC512)
71  u64x8 v;
72  v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
73  return (u64x8_is_zero_mask (v) & 0x1f) == 0;
74 #elif defined (CLIB_HAVE_VEC256)
75  u64x4 v = { a[4] ^ b[4], 0, 0, 0 };
76  v |= u64x4_load_unaligned (a) ^ u64x4_load_unaligned (b);
77  return u64x4_is_all_zero (v);
78 #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
79  u64x2 v = { a[4] ^ b[4], 0 };
80  v |= u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
81  v |= u64x2_load_unaligned (a + 2) ^ u64x2_load_unaligned (b + 2);
82  return u64x2_is_all_zero (v);
83 #else
84  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3])
85  | (a[4] ^ b[4])) == 0;
86 #endif
87 }
88 
89 #undef __included_bihash_template_h__
91 
92 #endif /* __included_bihash_40_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:419
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:38
epu8_epi32 epu16_epi32 u64x2
Definition: vector_sse42.h:640
static u64 clib_bihash_hash_40_8(const clib_bihash_kv_40_8_t *v)
Definition: bihash_40_8.h:47
static int clib_bihash_key_compare_40_8(u64 *a, u64 *b)
Definition: bihash_40_8.h:68
static u8 * format_bihash_kvp_40_8(u8 *s, va_list *args)
Definition: bihash_40_8.h:58
u64x4
Definition: vector_avx2.h:121