]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
1 | /*- |
2 | * BSD LICENSE | |
3 | * | |
4 | * Copyright(c) 2015 Cavium networks. All rights reserved. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * | |
11 | * * Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * * Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in | |
15 | * the documentation and/or other materials provided with the | |
16 | * distribution. | |
17 | * * Neither the name of Cavium networks nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
22 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
23 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
24 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
25 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
26 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
27 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
28 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
29 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
31 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | /* Functions to compare multiple of 16 byte keys (up to 128 bytes) */ | |
35 | static int | |
36 | rte_hash_k16_cmp_eq(const void *key1, const void *key2, | |
37 | size_t key_len __rte_unused) | |
38 | { | |
39 | uint64_t x0, x1, y0, y1; | |
40 | ||
41 | asm volatile( | |
42 | "ldp %x[x1], %x[x0], [%x[p1]]" | |
43 | : [x1]"=r"(x1), [x0]"=r"(x0) | |
44 | : [p1]"r"(key1) | |
45 | ); | |
46 | asm volatile( | |
47 | "ldp %x[y1], %x[y0], [%x[p2]]" | |
48 | : [y1]"=r"(y1), [y0]"=r"(y0) | |
49 | : [p2]"r"(key2) | |
50 | ); | |
51 | x0 ^= y0; | |
52 | x1 ^= y1; | |
53 | return !(x0 == 0 && x1 == 0); | |
54 | } | |
55 | ||
56 | static int | |
57 | rte_hash_k32_cmp_eq(const void *key1, const void *key2, size_t key_len) | |
58 | { | |
59 | return rte_hash_k16_cmp_eq(key1, key2, key_len) || | |
60 | rte_hash_k16_cmp_eq((const char *) key1 + 16, | |
61 | (const char *) key2 + 16, key_len); | |
62 | } | |
63 | ||
64 | static int | |
65 | rte_hash_k48_cmp_eq(const void *key1, const void *key2, size_t key_len) | |
66 | { | |
67 | return rte_hash_k16_cmp_eq(key1, key2, key_len) || | |
68 | rte_hash_k16_cmp_eq((const char *) key1 + 16, | |
69 | (const char *) key2 + 16, key_len) || | |
70 | rte_hash_k16_cmp_eq((const char *) key1 + 32, | |
71 | (const char *) key2 + 32, key_len); | |
72 | } | |
73 | ||
74 | static int | |
75 | rte_hash_k64_cmp_eq(const void *key1, const void *key2, size_t key_len) | |
76 | { | |
77 | return rte_hash_k32_cmp_eq(key1, key2, key_len) || | |
78 | rte_hash_k32_cmp_eq((const char *) key1 + 32, | |
79 | (const char *) key2 + 32, key_len); | |
80 | } | |
81 | ||
82 | static int | |
83 | rte_hash_k80_cmp_eq(const void *key1, const void *key2, size_t key_len) | |
84 | { | |
85 | return rte_hash_k64_cmp_eq(key1, key2, key_len) || | |
86 | rte_hash_k16_cmp_eq((const char *) key1 + 64, | |
87 | (const char *) key2 + 64, key_len); | |
88 | } | |
89 | ||
90 | static int | |
91 | rte_hash_k96_cmp_eq(const void *key1, const void *key2, size_t key_len) | |
92 | { | |
93 | return rte_hash_k64_cmp_eq(key1, key2, key_len) || | |
94 | rte_hash_k32_cmp_eq((const char *) key1 + 64, | |
95 | (const char *) key2 + 64, key_len); | |
96 | } | |
97 | ||
98 | static int | |
99 | rte_hash_k112_cmp_eq(const void *key1, const void *key2, size_t key_len) | |
100 | { | |
101 | return rte_hash_k64_cmp_eq(key1, key2, key_len) || | |
102 | rte_hash_k32_cmp_eq((const char *) key1 + 64, | |
103 | (const char *) key2 + 64, key_len) || | |
104 | rte_hash_k16_cmp_eq((const char *) key1 + 96, | |
105 | (const char *) key2 + 96, key_len); | |
106 | } | |
107 | ||
108 | static int | |
109 | rte_hash_k128_cmp_eq(const void *key1, const void *key2, size_t key_len) | |
110 | { | |
111 | return rte_hash_k64_cmp_eq(key1, key2, key_len) || | |
112 | rte_hash_k64_cmp_eq((const char *) key1 + 64, | |
113 | (const char *) key2 + 64, key_len); | |
114 | } |