DPDK 22.11.5
rte_cmp_arm64.h
1/* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2015 Cavium, Inc
3 */
4
5/* Functions to compare multiple of 16 byte keys (up to 128 bytes) */
6static int
7rte_hash_k16_cmp_eq(const void *key1, const void *key2,
8 size_t key_len __rte_unused)
9{
10 uint64_t x0, x1, y0, y1;
11
12 asm volatile(
13 "ldp %x[x1], %x[x0], [%x[p1]]"
14 : [x1]"=r"(x1), [x0]"=r"(x0)
15 : [p1]"r"(key1)
16 );
17 asm volatile(
18 "ldp %x[y1], %x[y0], [%x[p2]]"
19 : [y1]"=r"(y1), [y0]"=r"(y0)
20 : [p2]"r"(key2)
21 );
22 x0 ^= y0;
23 x1 ^= y1;
24 return !(x0 == 0 && x1 == 0);
25}
26
27static int
28rte_hash_k32_cmp_eq(const void *key1, const void *key2, size_t key_len)
29{
30 return rte_hash_k16_cmp_eq(key1, key2, key_len) ||
31 rte_hash_k16_cmp_eq((const char *) key1 + 16,
32 (const char *) key2 + 16, key_len);
33}
34
35static int
36rte_hash_k48_cmp_eq(const void *key1, const void *key2, size_t key_len)
37{
38 return rte_hash_k16_cmp_eq(key1, key2, key_len) ||
39 rte_hash_k16_cmp_eq((const char *) key1 + 16,
40 (const char *) key2 + 16, key_len) ||
41 rte_hash_k16_cmp_eq((const char *) key1 + 32,
42 (const char *) key2 + 32, key_len);
43}
44
45static int
46rte_hash_k64_cmp_eq(const void *key1, const void *key2, size_t key_len)
47{
48 return rte_hash_k32_cmp_eq(key1, key2, key_len) ||
49 rte_hash_k32_cmp_eq((const char *) key1 + 32,
50 (const char *) key2 + 32, key_len);
51}
52
53static int
54rte_hash_k80_cmp_eq(const void *key1, const void *key2, size_t key_len)
55{
56 return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
57 rte_hash_k16_cmp_eq((const char *) key1 + 64,
58 (const char *) key2 + 64, key_len);
59}
60
61static int
62rte_hash_k96_cmp_eq(const void *key1, const void *key2, size_t key_len)
63{
64 return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
65 rte_hash_k32_cmp_eq((const char *) key1 + 64,
66 (const char *) key2 + 64, key_len);
67}
68
69static int
70rte_hash_k112_cmp_eq(const void *key1, const void *key2, size_t key_len)
71{
72 return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
73 rte_hash_k32_cmp_eq((const char *) key1 + 64,
74 (const char *) key2 + 64, key_len) ||
75 rte_hash_k16_cmp_eq((const char *) key1 + 96,
76 (const char *) key2 + 96, key_len);
77}
78
79static int
80rte_hash_k128_cmp_eq(const void *key1, const void *key2, size_t key_len)
81{
82 return rte_hash_k64_cmp_eq(key1, key2, key_len) ||
83 rte_hash_k64_cmp_eq((const char *) key1 + 64,
84 (const char *) key2 + 64, key_len);
85}
#define __rte_unused
Definition: rte_common.h:120