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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #define BIHASH_TYPE _24_8
18 #define BIHASH_KVP_PER_PAGE 4
20 #ifndef __included_bihash_24_8_h__
21 #define __included_bihash_24_8_h__
23 #include <vppinfra/heap.h>
24 #include <vppinfra/format.h>
25 #include <vppinfra/pool.h>
26 #include <vppinfra/xxhash.h>
31 } clib_bihash_kv_24_8_t;
33 static inline int clib_bihash_is_free_24_8 (clib_bihash_kv_24_8_t *v)
35 /* Free values are memset to 0xff, check a bit... */
36 if (v->key[0] == ~0ULL && v->value == ~0ULL)
43 crc_u32(u32 data, u32 value)
45 __asm__ volatile( "crc32l %[data], %[value];"
46 : [value] "+r" (value)
47 : [data] "rm" (data));
51 static inline u64 clib_bihash_hash_24_8 (clib_bihash_kv_24_8_t *v)
53 u32 * dp = (u32 *) &v->key[0];
56 value = crc_u32 (dp[0], value);
57 value = crc_u32 (dp[1], value);
58 value = crc_u32 (dp[2], value);
59 value = crc_u32 (dp[3], value);
60 value = crc_u32 (dp[4], value);
61 value = crc_u32 (dp[5], value);
66 static inline u64 clib_bihash_hash_24_8 (clib_bihash_kv_24_8_t *v)
68 u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2];
69 return clib_xxhash (tmp);
73 static inline u8 * format_bihash_kvp_24_8 (u8 * s, va_list * args)
75 clib_bihash_kv_24_8_t * v = va_arg (*args, clib_bihash_kv_24_8_t *);
77 s = format (s, "key %llu %llu %llu value %llu",
78 v->key[0], v->key[1], v->key[2], v->value);
82 static inline int clib_bihash_key_compare_24_8 (u64 * a, u64 * b)
84 return ((a[0]^b[0]) | (a[1]^b[1]) | (a[2]^b[2])) == 0;
86 #undef __included_bihash_template_h__
87 #include <vppinfra/bihash_template.h>
89 #endif /* __included_bihash_24_8_h__ */