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Vector Packet Processing
bihash_16_8.h
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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 #undef BIHASH_TYPE
16 #undef BIHASH_KVP_PER_PAGE
17 
18 #define BIHASH_TYPE _16_8
19 #define BIHASH_KVP_PER_PAGE 4
20 
21 #ifndef __included_bihash_16_8_h__
22 #define __included_bihash_16_8_h__
23 
24 #include <vppinfra/heap.h>
25 #include <vppinfra/format.h>
26 #include <vppinfra/pool.h>
27 #include <vppinfra/xxhash.h>
28 #include <vppinfra/crc32.h>
29 
30 typedef struct
31 {
32  u64 key[2];
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, 16);
50 #else
51  u64 tmp = v->key[0] ^ v->key[1];
52  return clib_xxhash (tmp);
53 #endif
54 }
55 
56 static inline u8 *
57 format_bihash_kvp_16_8 (u8 * s, va_list * args)
58 {
59  clib_bihash_kv_16_8_t *v = va_arg (*args, clib_bihash_kv_16_8_t *);
60 
61  s = format (s, "key %llu %llu value %llu", v->key[0], v->key[1], v->value);
62  return s;
63 }
64 
65 static inline int
67 {
68 #if defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
69  u64x2 v;
70  v = u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
71  return u64x2_is_all_zero (v);
72 #else
73  return ((a[0] ^ b[0]) | (a[1] ^ b[1])) == 0;
74 #endif
75 }
76 
77 #undef __included_bihash_template_h__
79 
80 #endif /* __included_bihash_16_8_h__ */
81 
82 /*
83  * fd.io coding-style-patch-verification: ON
84  *
85  * Local Variables:
86  * eval: (c-set-style "gnu")
87  * End:
88  */
a
Definition: bitmap.h:538
unsigned long u64
Definition: types.h:89
Fixed length block allocator.
static int clib_bihash_key_compare_16_8(u64 *a, u64 *b)
Definition: bihash_16_8.h:66
static u64 clib_xxhash(u64 key)
Definition: xxhash.h:58
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
static int clib_bihash_is_free_16_8(clib_bihash_kv_16_8_t *v)
Definition: bihash_16_8.h:37
unsigned char u8
Definition: types.h:56
static u8 * format_bihash_kvp_16_8(u8 *s, va_list *args)
Definition: bihash_16_8.h:57
epu8_epi32 epu16_epi32 u64x2
Definition: vector_sse42.h:640
static u64 clib_bihash_hash_16_8(clib_bihash_kv_16_8_t *v)
Definition: bihash_16_8.h:46