/* * Copyright (c) 2015 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #undef BIHASH_TYPE #define BIHASH_TYPE _24_8 #define BIHASH_KVP_PER_PAGE 4 #ifndef __included_bihash_24_8_h__ #define __included_bihash_24_8_h__ #include #include #include #include typedef struct { u64 key[3]; u64 value; } clib_bihash_kv_24_8_t; static inline int clib_bihash_is_free_24_8 (clib_bihash_kv_24_8_t *v) { /* Free values are memset to 0xff, check a bit... */ if (v->key[0] == ~0ULL && v->value == ~0ULL) return 1; return 0; } #if !defined(__powerpc64__) && !defined(__aarch64__) static inline u32 crc_u32(u32 data, u32 value) { __asm__ volatile( "crc32l %[data], %[value];" : [value] "+r" (value) : [data] "rm" (data)); return value; } static inline u64 clib_bihash_hash_24_8 (clib_bihash_kv_24_8_t *v) { #if 0 u64 * dp = (u64 *) &v->key[0]; u64 value = 0; value __builtin_ia32_crc32di (dp[0], value); value __builtin_ia32_crc32di (dp[1], value); value __builtin_ia32_crc32di (dp[2], value); #endif u32 * dp = (u32 *) &v->key[0]; u32 value = 0; value = crc_u32 (dp[0], value); value = crc_u32 (dp[1], value); value = crc_u32 (dp[2], value); value = crc_u32 (dp[3], value); value = crc_u32 (dp[4], value); value = crc_u32 (dp[5], value); return value; } #else static inline u64 clib_bihash_hash_24_8 (clib_bihash_kv_24_8_t *v) { u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2]; return clib_xxhash (tmp); } #endif static inline u8 * format_bihash_kvp_24_8 (u8 * s, va_list * args) { clib_bihash_kv_24_8_t * v = va_arg (*args, clib_bihash_kv_24_8_t *); s = format (s, "key %llu %llu %llu value %llu", v->key[0], v->key[1], v->key[2], v->value); return s; } static inline int clib_bihash_key_compare_24_8 (u64 * a, u64 * b) { return ((a[0]^b[0]) | (a[1]^b[1]) | (a[2]^b[2])) == 0; } #undef __included_bihash_template_h__ #include #endif /* __included_bihash_24_8_h__ */