FD.io VPP  v18.07-rc0-415-g6c78436
Vector Packet Processing
bihash_24_8.h
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1 /*
2  * Copyright (c) 2015 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 #undef BIHASH_TYPE
16 #undef BIHASH_KVP_CACHE_SIZE
17 #undef BIHASH_KVP_PER_PAGE
18 
19 #define BIHASH_TYPE _24_8
20 #define BIHASH_KVP_PER_PAGE 4
21 #define BIHASH_KVP_CACHE_SIZE 0
22 
23 #ifndef __included_bihash_24_8_h__
24 #define __included_bihash_24_8_h__
25 
26 #include <vppinfra/crc32.h>
27 #include <vppinfra/heap.h>
28 #include <vppinfra/format.h>
29 #include <vppinfra/pool.h>
30 #include <vppinfra/xxhash.h>
31 
32 typedef struct
33 {
34  u64 key[3];
37 
38 static inline int
40 {
41  /* Free values are memset to 0xff, check a bit... */
42  if (v->key[0] == ~0ULL && v->value == ~0ULL)
43  return 1;
44  return 0;
45 }
46 
47 static inline u64
49 {
50 #ifdef clib_crc32c_uses_intrinsics
51  return clib_crc32c ((u8 *) v->key, 24);
52 #else
53  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2];
54  return clib_xxhash (tmp);
55 #endif
56 }
57 
58 static inline u8 *
59 format_bihash_kvp_24_8 (u8 * s, va_list * args)
60 {
61  clib_bihash_kv_24_8_t *v = va_arg (*args, clib_bihash_kv_24_8_t *);
62 
63  s = format (s, "key %llu %llu %llu value %llu",
64  v->key[0], v->key[1], v->key[2], v->value);
65  return s;
66 }
67 
68 static inline int
70 {
71 #if defined (CLIB_HAVE_VEC512)
72  u64x8 v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
73  return (u64x8_is_zero_mask (v) & 0x7) == 0;
74 #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
75  u64x2 v;
76  v = u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
77  v |= u64x2_load_unaligned (a + 1) ^ u64x2_load_unaligned (b + 1);
78  return u64x2_is_all_zero (v);
79 #else
80  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) == 0;
81 #endif
82 }
83 
84 #undef __included_bihash_template_h__
86 
87 #endif /* __included_bihash_24_8_h__ */
88 
89 /*
90  * fd.io coding-style-patch-verification: ON
91  *
92  * Local Variables:
93  * eval: (c-set-style "gnu")
94  * End:
95  */
a
Definition: bitmap.h:537
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 u64 clib_bihash_hash_24_8(const clib_bihash_kv_24_8_t *v)
Definition: bihash_24_8.h:48
static int clib_bihash_key_compare_24_8(u64 *a, u64 *b)
Definition: bihash_24_8.h:69
static int clib_bihash_is_free_24_8(const clib_bihash_kv_24_8_t *v)
Definition: bihash_24_8.h:39
static int u64x2_is_all_zero(u64x2 x)
Definition: vector_neon.h:43
#define v
Definition: acl.c:491
static u8 * format_bihash_kvp_24_8(u8 *s, va_list *args)
Definition: bihash_24_8.h:59