1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 static void
fletcher_2_native(const void * buf,uint64_t size,const void * ctx_template __unused,zio_cksum_t * zcp)27 fletcher_2_native(const void *buf, uint64_t size,
28 const void *ctx_template __unused, zio_cksum_t *zcp)
29 {
30 const uint64_t *ip = buf;
31 const uint64_t *ipend = ip + (size / sizeof (uint64_t));
32 uint64_t a0, b0, a1, b1;
33
34 for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
35 a0 += ip[0];
36 a1 += ip[1];
37 b0 += a0;
38 b1 += a1;
39 }
40
41 ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1);
42 }
43
44 static void
fletcher_2_byteswap(const void * buf,uint64_t size,const void * ctx_template __unused,zio_cksum_t * zcp)45 fletcher_2_byteswap(const void *buf, uint64_t size,
46 const void *ctx_template __unused, zio_cksum_t *zcp)
47 {
48 const uint64_t *ip = buf;
49 const uint64_t *ipend = ip + (size / sizeof (uint64_t));
50 uint64_t a0, b0, a1, b1;
51
52 for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
53 a0 += BSWAP_64(ip[0]);
54 a1 += BSWAP_64(ip[1]);
55 b0 += a0;
56 b1 += a1;
57 }
58
59 ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1);
60 }
61
62 static void
fletcher_4_native(const void * buf,uint64_t size,const void * ctx_template __unused,zio_cksum_t * zcp)63 fletcher_4_native(const void *buf, uint64_t size,
64 const void *ctx_template __unused, zio_cksum_t *zcp)
65 {
66 const uint32_t *ip = buf;
67 const uint32_t *ipend = ip + (size / sizeof (uint32_t));
68 uint64_t a, b, c, d;
69
70 for (a = b = c = d = 0; ip < ipend; ip++) {
71 a += ip[0];
72 b += a;
73 c += b;
74 d += c;
75 }
76
77 ZIO_SET_CHECKSUM(zcp, a, b, c, d);
78 }
79
80 static void
fletcher_4_byteswap(const void * buf,uint64_t size,const void * ctx_template __unused,zio_cksum_t * zcp)81 fletcher_4_byteswap(const void *buf, uint64_t size,
82 const void *ctx_template __unused, zio_cksum_t *zcp)
83 {
84 const uint32_t *ip = buf;
85 const uint32_t *ipend = ip + (size / sizeof (uint32_t));
86 uint64_t a, b, c, d;
87
88 for (a = b = c = d = 0; ip < ipend; ip++) {
89 a += BSWAP_32(ip[0]);
90 b += a;
91 c += b;
92 d += c;
93 }
94
95 ZIO_SET_CHECKSUM(zcp, a, b, c, d);
96 }
97