Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame^] | 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 | |
| 17 | #define BIHASH_TYPE _16_8 |
| 18 | #define BIHASH_KVP_PER_PAGE 4 |
| 19 | |
| 20 | #ifndef __included_bihash_16_8_h__ |
| 21 | #define __included_bihash_16_8_h__ |
| 22 | |
| 23 | #include <vppinfra/heap.h> |
| 24 | #include <vppinfra/format.h> |
| 25 | #include <vppinfra/pool.h> |
| 26 | #include <vppinfra/xxhash.h> |
| 27 | |
| 28 | typedef struct |
| 29 | { |
| 30 | u64 key[2]; |
| 31 | u64 value; |
| 32 | } clib_bihash_kv_16_8_t; |
| 33 | |
| 34 | static inline int |
| 35 | clib_bihash_is_free_16_8 (clib_bihash_kv_16_8_t * v) |
| 36 | { |
| 37 | /* Free values are memset to 0xff, check a bit... */ |
| 38 | if (v->key[0] == ~0ULL && v->value == ~0ULL) |
| 39 | return 1; |
| 40 | return 0; |
| 41 | } |
| 42 | |
| 43 | #if __SSE4_2__ |
| 44 | #ifndef __defined_crc_u32__ |
| 45 | #define __defined_crc_u32__ |
| 46 | static inline u32 |
| 47 | crc_u32 (u32 data, u32 value) |
| 48 | { |
| 49 | __asm__ volatile ("crc32l %[data], %[value];":[value] "+r" (value):[data] |
| 50 | "rm" (data)); |
| 51 | return value; |
| 52 | } |
| 53 | #endif /* __defined_crc_u32__ */ |
| 54 | |
| 55 | static inline u64 |
| 56 | clib_bihash_hash_16_8 (clib_bihash_kv_16_8_t * v) |
| 57 | { |
| 58 | u32 *dp = (u32 *) & v->key[0]; |
| 59 | u32 value = 0; |
| 60 | |
| 61 | value = crc_u32 (dp[0], value); |
| 62 | value = crc_u32 (dp[1], value); |
| 63 | value = crc_u32 (dp[2], value); |
| 64 | value = crc_u32 (dp[3], value); |
| 65 | |
| 66 | return value; |
| 67 | } |
| 68 | #else |
| 69 | static inline u64 |
| 70 | clib_bihash_hash_16_8 (clib_bihash_kv_16_8_t * v) |
| 71 | { |
| 72 | u64 tmp = v->key[0] ^ v->key[1]; |
| 73 | return clib_xxhash (tmp); |
| 74 | } |
| 75 | #endif |
| 76 | |
| 77 | static inline u8 * |
| 78 | format_bihash_kvp_16_8 (u8 * s, va_list * args) |
| 79 | { |
| 80 | clib_bihash_kv_16_8_t *v = va_arg (*args, clib_bihash_kv_16_8_t *); |
| 81 | |
| 82 | s = format (s, "key %llu %llu value %llu", v->key[0], v->key[1], v->value); |
| 83 | return s; |
| 84 | } |
| 85 | |
| 86 | static inline int |
| 87 | clib_bihash_key_compare_16_8 (u64 * a, u64 * b) |
| 88 | { |
| 89 | return ((a[0] ^ b[0]) | (a[1] ^ b[1])) == 0; |
| 90 | } |
| 91 | |
| 92 | #undef __included_bihash_template_h__ |
| 93 | #include <vppinfra/bihash_template.h> |
| 94 | |
| 95 | #endif /* __included_bihash_16_8_h__ */ |
| 96 | |
| 97 | /* |
| 98 | * fd.io coding-style-patch-verification: ON |
| 99 | * |
| 100 | * Local Variables: |
| 101 | * eval: (c-set-style "gnu") |
| 102 | * End: |
| 103 | */ |