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Vector Packet Processing
bihash_48_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 
16 #undef BIHASH_TYPE
17 #undef BIHASH_KVP_PER_PAGE
18 
19 #define BIHASH_TYPE _48_8
20 #define BIHASH_KVP_PER_PAGE 4
21 
22 #ifndef __included_bihash_48_8_h__
23 #define __included_bihash_48_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[6];
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, 48);
51 #else
52  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2] ^ v->key[3] ^ v->key[4]
53  ^ v->key[5];
54  return clib_xxhash (tmp);
55 #endif
56 }
57 
58 static inline u8 *
59 format_bihash_kvp_48_8 (u8 * s, va_list * args)
60 {
61  clib_bihash_kv_48_8_t *v = va_arg (*args, clib_bihash_kv_48_8_t *);
62 
63  s = format (s, "key %llu %llu %llu %llu %llu %llu value %llu", v->key[0],
64  v->key[1], v->key[2], v->key[3], v->key[4], v->key[5],
65  v->value);
66  return s;
67 }
68 
69 static inline int
71 {
72 #if defined (CLIB_HAVE_VEC512)
73  u64x8 v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
74  return (u64x8_is_zero_mask (v) & 0x3f) == 0;
75 #elif defined (CLIB_HAVE_VEC256)
76  u64x4 v = { 0 };
77  v = u64x4_insert_lo (v, u64x2_load_unaligned (a + 4) ^
78  u64x2_load_unaligned (b + 4));
79  v |= u64x4_load_unaligned (a) ^ u64x4_load_unaligned (b);
80  return u64x4_is_all_zero (v);
81 #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
82  u64x2 v;
83  v = u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
84  v |= u64x2_load_unaligned (a + 2) ^ u64x2_load_unaligned (b + 2);
85  v |= u64x2_load_unaligned (a + 4) ^ u64x2_load_unaligned (b + 4);
86  return u64x2_is_all_zero (v);
87 #else
88  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3])
89  | (a[4] ^ b[4]) | (a[5] ^ b[5])) == 0;
90 #endif
91 }
92 
93 #undef __included_bihash_template_h__
95 
96 #endif /* __included_bihash_48_8_h__ */
97 
98 /*
99  * fd.io coding-style-patch-verification: ON
100  *
101  * Local Variables:
102  * eval: (c-set-style "gnu")
103  * End:
104  */
static u64 clib_bihash_hash_48_8(const clib_bihash_kv_48_8_t *v)
Definition: bihash_48_8.h:47
a
Definition: bitmap.h:538
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:70
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:59
static int clib_bihash_is_free_48_8(const clib_bihash_kv_48_8_t *v)
Definition: bihash_48_8.h:38
epu8_epi32 epu16_epi32 u64x2
Definition: vector_sse42.h:640
u64x4
Definition: vector_avx2.h:121