src/vppinfra/flowhash_24_16.h

   1 /*
   2  * Copyright (c) 2012 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 #ifndef SRC_VPPINFRA_FLOWHASH_24_16_H_
  17 #define SRC_VPPINFRA_FLOWHASH_24_16_H_
  18
  19 #ifdef __included_flowhash_template_h__
  20 #undef __included_flowhash_template_h__
  21 #endif
  22
  23 #include <vppinfra/clib.h>
  24 #include <vppinfra/xxhash.h>
  25 #include <vppinfra/crc32.h>
  26
  27 typedef struct {
  28   u64 as_u64[3];
  29 } flowhash_skey_24_16_t;
  30
  31 typedef struct {
  32   u64 as_u64[3];
  33 } flowhash_lkey_24_16_t;
  34
  35 typedef struct {
  36   u64 as_u64[2];
  37 } flowhash_value_24_16_t;
  38
  39 #define FLOWHASH_TYPE _24_16
  40 #include <vppinfra/flowhash_template.h>
  41 #undef FLOWHASH_TYPE
  42
  43 static_always_inline
  44 u32 flowhash_hash_24_16(flowhash_lkey_24_16_t *k)
  45 {
  46 #ifdef clib_crc32c_uses_intrinsics
  47   return clib_crc32c ((u8 *) &k->as_u64[0], 24);
  48 #else
  49   u64 val = 0;
  50   val ^= k->as_u64[0];
  51   val ^= k->as_u64[1];
  52   val ^= k->as_u64[2];
  53   return (u32)clib_xxhash (val);
  54 #endif
  55 }
  56
  57 static_always_inline
  58 u8 flowhash_cmp_key_24_16(flowhash_skey_24_16_t *a,
  59                           flowhash_lkey_24_16_t *b)
  60 {
  61   u8 val = 0;
  62   val |= (a->as_u64[0] != b->as_u64[0]);
  63   val |= (a->as_u64[1] != b->as_u64[1]);
  64   val |= (a->as_u64[2] != b->as_u64[2]);
  65   return val;
  66 }
  67
  68 static_always_inline
  69 void flowhash_cpy_key_24_16(flowhash_skey_24_16_t *dst,
  70                                     flowhash_lkey_24_16_t *src)
  71 {
  72   dst->as_u64[0] = src->as_u64[0];
  73   dst->as_u64[1] = src->as_u64[1];
  74   dst->as_u64[2] = src->as_u64[2];
  75 }
  76
  77 #endif /* SRC_VPPINFRA_FLOWHASH_24_16_H_ */