projects / mirror_zfs.git / blame
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|---|---|---|
| 34dc7c2f BB |
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 | ||
| b128c09f | 26 | #pragma ident "%Z%%M% %I% %E% SMI" |
| 34dc7c2f BB |
27 | |
| 28 | #include <sys/types.h> | |
| 29 | #include <sys/sysmacros.h> | |
| 30 | #include <sys/byteorder.h> | |
| 31 | #include <sys/spa.h> | |
| 32 | ||
| 33 | void | |
| 34 | fletcher_2_native(const void *buf, uint64_t size, zio_cksum_t *zcp) | |
| 35 | { | |
| 36 | const uint64_t *ip = buf; | |
| 37 | const uint64_t *ipend = ip + (size / sizeof (uint64_t)); | |
| 38 | uint64_t a0, b0, a1, b1; | |
| 39 | ||
| 40 | for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) { | |
| 41 | a0 += ip[0]; | |
| 42 | a1 += ip[1]; | |
| 43 | b0 += a0; | |
| 44 | b1 += a1; | |
| 45 | } | |
| 46 | ||
| 47 | ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1); | |
| 48 | } | |
| 49 | ||
| 50 | void | |
| 51 | fletcher_2_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp) | |
| 52 | { | |
| 53 | const uint64_t *ip = buf; | |
| 54 | const uint64_t *ipend = ip + (size / sizeof (uint64_t)); | |
| 55 | uint64_t a0, b0, a1, b1; | |
| 56 | ||
| 57 | for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) { | |
| 58 | a0 += BSWAP_64(ip[0]); | |
| 59 | a1 += BSWAP_64(ip[1]); | |
| 60 | b0 += a0; | |
| 61 | b1 += a1; | |
| 62 | } | |
| 63 | ||
| 64 | ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1); | |
| 65 | } | |
| 66 | ||
| 67 | void | |
| 68 | fletcher_4_native(const void *buf, uint64_t size, zio_cksum_t *zcp) | |
| 69 | { | |
| 70 | const uint32_t *ip = buf; | |
| 71 | const uint32_t *ipend = ip + (size / sizeof (uint32_t)); | |
| 72 | uint64_t a, b, c, d; | |
| 73 | ||
| 74 | for (a = b = c = d = 0; ip < ipend; ip++) { | |
| 75 | a += ip[0]; | |
| 76 | b += a; | |
| 77 | c += b; | |
| 78 | d += c; | |
| 79 | } | |
| 80 | ||
| 81 | ZIO_SET_CHECKSUM(zcp, a, b, c, d); | |
| 82 | } | |
| 83 | ||
| 84 | void | |
| 85 | fletcher_4_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp) | |
| 86 | { | |
| 87 | const uint32_t *ip = buf; | |
| 88 | const uint32_t *ipend = ip + (size / sizeof (uint32_t)); | |
| 89 | uint64_t a, b, c, d; | |
| 90 | ||
| 91 | for (a = b = c = d = 0; ip < ipend; ip++) { | |
| 92 | a += BSWAP_32(ip[0]); | |
| 93 | b += a; | |
| 94 | c += b; | |
| 95 | d += c; | |
| 96 | } | |
| 97 | ||
| 98 | ZIO_SET_CHECKSUM(zcp, a, b, c, d); | |
| 99 | } | |
| 100 | ||
| 101 | void | |
| 102 | fletcher_4_incremental_native(const void *buf, uint64_t size, | |
| 103 | zio_cksum_t *zcp) | |
| 104 | { | |
| 105 | const uint32_t *ip = buf; | |
| 106 | const uint32_t *ipend = ip + (size / sizeof (uint32_t)); | |
| 107 | uint64_t a, b, c, d; | |
| 108 | ||
| 109 | a = zcp->zc_word[0]; | |
| 110 | b = zcp->zc_word[1]; | |
| 111 | c = zcp->zc_word[2]; | |
| 112 | d = zcp->zc_word[3]; | |
| 113 | ||
| 114 | for (; ip < ipend; ip++) { | |
| 115 | a += ip[0]; | |
| 116 | b += a; | |
| 117 | c += b; | |
| 118 | d += c; | |
| 119 | } | |
| 120 | ||
| 121 | ZIO_SET_CHECKSUM(zcp, a, b, c, d); | |
| 122 | } | |
| 123 | ||
| 124 | void | |
| 125 | fletcher_4_incremental_byteswap(const void *buf, uint64_t size, | |
| 126 | zio_cksum_t *zcp) | |
| 127 | { | |
| 128 | const uint32_t *ip = buf; | |
| 129 | const uint32_t *ipend = ip + (size / sizeof (uint32_t)); | |
| 130 | uint64_t a, b, c, d; | |
| 131 | ||
| 132 | a = zcp->zc_word[0]; | |
| 133 | b = zcp->zc_word[1]; | |
| 134 | c = zcp->zc_word[2]; | |
| 135 | d = zcp->zc_word[3]; | |
| 136 | ||
| 137 | for (; ip < ipend; ip++) { | |
| 138 | a += BSWAP_32(ip[0]); | |
| 139 | b += a; | |
| 140 | c += b; | |
| 141 | d += c; | |
| 142 | } | |
| 143 | ||
| 144 | ZIO_SET_CHECKSUM(zcp, a, b, c, d); | |
| 145 | } |