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9f95a23c TL |
1 | /* SPDX-License-Identifier: BSD-3-Clause |
2 | * Copyright(c) 2015 Cavium, Inc | |
7c673cae FG |
3 | */ |
4 | ||
5 | /* Functions to compare multiple of 16 byte keys (up to 128 bytes) */ | |
6 | static int | |
7 | rte_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 | ||
27 | static int | |
28 | rte_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 | ||
35 | static int | |
36 | rte_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 | ||
45 | static int | |
46 | rte_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 | ||
53 | static int | |
54 | rte_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 | ||
61 | static int | |
62 | rte_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 | ||
69 | static int | |
70 | rte_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 | ||
79 | static int | |
80 | rte_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 | } |