FD.io VPP  v19.01.2-3-gf61a1a8
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_PER_PAGE
17 
18 #define BIHASH_TYPE _24_8
19 #define BIHASH_KVP_PER_PAGE 4
20 
21 #ifndef __included_bihash_24_8_h__
22 #define __included_bihash_24_8_h__
23 
24 #include <vppinfra/crc32.h>
25 #include <vppinfra/heap.h>
26 #include <vppinfra/format.h>
27 #include <vppinfra/pool.h>
28 #include <vppinfra/xxhash.h>
29 
30 typedef struct
31 {
32  u64 key[3];
35 
36 static inline int
38 {
39  /* Free values are clib_memset to 0xff, check a bit... */
40  if (v->key[0] == ~0ULL && v->value == ~0ULL)
41  return 1;
42  return 0;
43 }
44 
45 static inline u64
47 {
48 #ifdef clib_crc32c_uses_intrinsics
49  return clib_crc32c ((u8 *) v->key, 24);
50 #else
51  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2];
52  return clib_xxhash (tmp);
53 #endif
54 }
55 
56 static inline u8 *
57 format_bihash_kvp_24_8 (u8 * s, va_list * args)
58 {
59  clib_bihash_kv_24_8_t *v = va_arg (*args, clib_bihash_kv_24_8_t *);
60 
61  s = format (s, "key %llu %llu %llu value %llu",
62  v->key[0], v->key[1], v->key[2], v->value);
63  return s;
64 }
65 
66 static inline int
68 {
69 #if defined (CLIB_HAVE_VEC512)
70  u64x8 v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
71  return (u64x8_is_zero_mask (v) & 0x7) == 0;
72 #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
73  u64x2 v = { a[2] ^ b[2], 0 };
74  v |= u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
75  return u64x2_is_all_zero (v);
76 #else
77  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) == 0;
78 #endif
79 }
80 
81 #undef __included_bihash_template_h__
83 
84 #endif /* __included_bihash_24_8_h__ */
85 
86 /*
87  * fd.io coding-style-patch-verification: ON
88  *
89  * Local Variables:
90  * eval: (c-set-style "gnu")
91  * End:
92  */
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 u64 clib_bihash_hash_24_8(const clib_bihash_kv_24_8_t *v)
Definition: bihash_24_8.h:46
static int clib_bihash_key_compare_24_8(u64 *a, u64 *b)
Definition: bihash_24_8.h:67
static int clib_bihash_is_free_24_8(const clib_bihash_kv_24_8_t *v)
Definition: bihash_24_8.h:37
epu8_epi32 epu16_epi32 u64x2
Definition: vector_sse42.h:640
static u8 * format_bihash_kvp_24_8(u8 *s, va_list *args)
Definition: bihash_24_8.h:57