summaryrefslogtreecommitdiff
path: root/lib/librte_table/rte_table_hash_func.h
blob: 02296eabe4bac77e1ac00223b05a299d7ed23b80 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2018 Intel Corporation
 */

#ifndef __INCLUDE_RTE_TABLE_HASH_FUNC_H__
#define __INCLUDE_RTE_TABLE_HASH_FUNC_H__

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>

#include <rte_compat.h>
#include <rte_common.h>

static inline uint64_t __rte_experimental
rte_crc32_u64_generic(uint64_t crc, uint64_t value)
{
	int i;

	crc = (crc & 0xFFFFFFFFLLU) ^ value;
	for (i = 63; i >= 0; i--) {
		uint64_t mask;

		mask = -(crc & 1LLU);
		crc = (crc >> 1LLU) ^ (0x82F63B78LLU & mask);
	}

	return crc;
}

#if defined(RTE_ARCH_X86_64)

#include <x86intrin.h>

static inline uint64_t
rte_crc32_u64(uint64_t crc, uint64_t v)
{
	return _mm_crc32_u64(crc, v);
}

#elif defined(RTE_ARCH_ARM64)
#include "rte_table_hash_func_arm64.h"
#else

static inline uint64_t
rte_crc32_u64(uint64_t crc, uint64_t v)
{
	return rte_crc32_u64_generic(crc, v);
}

#endif

static inline uint64_t __rte_experimental
rte_table_hash_crc_key8(void *key, void *mask, __rte_unused uint32_t key_size,
	uint64_t seed)
{
	uint64_t *k = key;
	uint64_t *m = mask;
	uint64_t crc0;

	crc0 = rte_crc32_u64(seed, k[0] & m[0]);

	return crc0;
}

static inline uint64_t __rte_experimental
rte_table_hash_crc_key16(void *key, void *mask, __rte_unused uint32_t key_size,
	uint64_t seed)
{
	uint64_t *k = key;
	uint64_t *m = mask;
	uint64_t k0, crc0, crc1;

	k0 = k[0] & m[0];

	crc0 = rte_crc32_u64(k0, seed);
	crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);

	crc0 ^= crc1;

	return crc0;
}

static inline uint64_t __rte_experimental
rte_table_hash_crc_key24(void *key, void *mask, __rte_unused uint32_t key_size,
	uint64_t seed)
{
	uint64_t *k = key;
	uint64_t *m = mask;
	uint64_t k0, k2, crc0, crc1;

	k0 = k[0] & m[0];
	k2 = k[2] & m[2];

	crc0 = rte_crc32_u64(k0, seed);
	crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);

	crc0 = rte_crc32_u64(crc0, k2);

	crc0 ^= crc1;

	return crc0;
}

static inline uint64_t __rte_experimental
rte_table_hash_crc_key32(void *key, void *mask, __rte_unused uint32_t key_size,
	uint64_t seed)
{
	uint64_t *k = key;
	uint64_t *m = mask;
	uint64_t k0, k2, crc0, crc1, crc2, crc3;

	k0 = k[0] & m[0];
	k2 = k[2] & m[2];

	crc0 = rte_crc32_u64(k0, seed);
	crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);

	crc2 = rte_crc32_u64(k2, k[3] & m[3]);
	crc3 = k2 >> 32;

	crc0 = rte_crc32_u64(crc0, crc1);
	crc1 = rte_crc32_u64(crc2, crc3);

	crc0 ^= crc1;

	return crc0;
}

static inline uint64_t __rte_experimental
rte_table_hash_crc_key40(void *key, void *mask, __rte_unused uint32_t key_size,
	uint64_t seed)
{
	uint64_t *k = key;
	uint64_t *m = mask;
	uint64_t k0, k2, crc0, crc1, crc2, crc3;

	k0 = k[0] & m[0];
	k2 = k[2] & m[2];

	crc0 = rte_crc32_u64(k0, seed);
	crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);

	crc2 = rte_crc32_u64(k2, k[3] & m[3]);
	crc3 = rte_crc32_u64(k2 >> 32, k[4] & m[4]);

	crc0 = rte_crc32_u64(crc0, crc1);
	crc1 = rte_crc32_u64(crc2, crc3);

	crc0 ^= crc1;

	return crc0;
}

static inline uint64_t __rte_experimental
rte_table_hash_crc_key48(void *key, void *mask, __rte_unused uint32_t key_size,
	uint64_t seed)
{
	uint64_t *k = key;
	uint64_t *m = mask;
	uint64_t k0, k2, k5, crc0, crc1, crc2, crc3;

	k0 = k[0] & m[0];
	k2 = k[2] & m[2];
	k5 = k[5] & m[5];

	crc0 = rte_crc32_u64(k0, seed);
	crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);

	crc2 = rte_crc32_u64(k2, k[3] & m[3]);
	crc3 = rte_crc32_u64(k2 >> 32, k[4] & m[4]);

	crc0 = rte_crc32_u64(crc0, (crc1 << 32) ^ crc2);
	crc1 = rte_crc32_u64(crc3, k5);

	crc0 ^= crc1;

	return crc0;
}

static inline uint64_t __rte_experimental
rte_table_hash_crc_key56(void *key, void *mask, __rte_unused uint32_t key_size,
	uint64_t seed)
{
	uint64_t *k = key;
	uint64_t *m = mask;
	uint64_t k0, k2, k5, crc0, crc1, crc2, crc3, crc4, crc5;

	k0 = k[0] & m[0];
	k2 = k[2] & m[2];
	k5 = k[5] & m[5];

	crc0 = rte_crc32_u64(k0, seed);
	crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);

	crc2 = rte_crc32_u64(k2, k[3] & m[3]);
	crc3 = rte_crc32_u64(k2 >> 32, k[4] & m[4]);

	crc4 = rte_crc32_u64(k5, k[6] & m[6]);
	crc5 = k5 >> 32;

	crc0 = rte_crc32_u64(crc0, (crc1 << 32) ^ crc2);
	crc1 = rte_crc32_u64(crc3, (crc4 << 32) ^ crc5);

	crc0 ^= crc1;

	return crc0;
}

static inline uint64_t __rte_experimental
rte_table_hash_crc_key64(void *key, void *mask, __rte_unused uint32_t key_size,
	uint64_t seed)
{
	uint64_t *k = key;
	uint64_t *m = mask;
	uint64_t k0, k2, k5, crc0, crc1, crc2, crc3, crc4, crc5;

	k0 = k[0] & m[0];
	k2 = k[2] & m[2];
	k5 = k[5] & m[5];

	crc0 = rte_crc32_u64(k0, seed);
	crc1 = rte_crc32_u64(k0 >> 32, k[1] & m[1]);

	crc2 = rte_crc32_u64(k2, k[3] & m[3]);
	crc3 = rte_crc32_u64(k2 >> 32, k[4] & m[4]);

	crc4 = rte_crc32_u64(k5, k[6] & m[6]);
	crc5 = rte_crc32_u64(k5 >> 32, k[7] & m[7]);

	crc0 = rte_crc32_u64(crc0, (crc1 << 32) ^ crc2);
	crc1 = rte_crc32_u64(crc3, (crc4 << 32) ^ crc5);

	crc0 ^= crc1;

	return crc0;
}

#ifdef __cplusplus
}
#endif

#endif