1185029Spjd/* 2185029Spjd * CDDL HEADER START 3185029Spjd * 4185029Spjd * The contents of this file are subject to the terms of the 5185029Spjd * Common Development and Distribution License (the "License"). 6185029Spjd * You may not use this file except in compliance with the License. 7185029Spjd * 8185029Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9185029Spjd * or http://www.opensolaris.org/os/licensing. 10185029Spjd * See the License for the specific language governing permissions 11185029Spjd * and limitations under the License. 12185029Spjd * 13185029Spjd * When distributing Covered Code, include this CDDL HEADER in each 14185029Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15185029Spjd * If applicable, add the following below this CDDL HEADER, with the 16185029Spjd * fields enclosed by brackets "[]" replaced with your own identifying 17185029Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 18185029Spjd * 19185029Spjd * CDDL HEADER END 20185029Spjd */ 21185029Spjd/* 22185029Spjd * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23185029Spjd * Use is subject to license terms. 24185029Spjd */ 25185029Spjd 26185029Spjd/*#pragma ident "%Z%%M% %I% %E% SMI"*/ 27185029Spjd 28185029Spjdstatic void 29185029Spjdfletcher_2_native(const void *buf, uint64_t size, zio_cksum_t *zcp) 30185029Spjd{ 31185029Spjd const uint64_t *ip = buf; 32185029Spjd const uint64_t *ipend = ip + (size / sizeof (uint64_t)); 33185029Spjd uint64_t a0, b0, a1, b1; 34185029Spjd 35185029Spjd for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) { 36185029Spjd a0 += ip[0]; 37185029Spjd a1 += ip[1]; 38185029Spjd b0 += a0; 39185029Spjd b1 += a1; 40185029Spjd } 41185029Spjd 42185029Spjd ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1); 43185029Spjd} 44185029Spjd 45185029Spjdstatic void 46219089Spjdfletcher_2_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp) 47219089Spjd{ 48219089Spjd const uint64_t *ip = buf; 49219089Spjd const uint64_t *ipend = ip + (size / sizeof (uint64_t)); 50219089Spjd uint64_t a0, b0, a1, b1; 51219089Spjd 52219089Spjd for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) { 53219089Spjd a0 += BSWAP_64(ip[0]); 54219089Spjd a1 += BSWAP_64(ip[1]); 55219089Spjd b0 += a0; 56219089Spjd b1 += a1; 57219089Spjd } 58219089Spjd 59219089Spjd ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1); 60219089Spjd} 61219089Spjd 62219089Spjdstatic void 63185029Spjdfletcher_4_native(const void *buf, uint64_t size, zio_cksum_t *zcp) 64185029Spjd{ 65185029Spjd const uint32_t *ip = buf; 66185029Spjd const uint32_t *ipend = ip + (size / sizeof (uint32_t)); 67185029Spjd uint64_t a, b, c, d; 68185029Spjd 69185029Spjd for (a = b = c = d = 0; ip < ipend; ip++) { 70185029Spjd a += ip[0]; 71185029Spjd b += a; 72185029Spjd c += b; 73185029Spjd d += c; 74185029Spjd } 75185029Spjd 76185029Spjd ZIO_SET_CHECKSUM(zcp, a, b, c, d); 77185029Spjd} 78219089Spjd 79219089Spjdstatic void 80219089Spjdfletcher_4_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp) 81219089Spjd{ 82219089Spjd const uint32_t *ip = buf; 83219089Spjd const uint32_t *ipend = ip + (size / sizeof (uint32_t)); 84219089Spjd uint64_t a, b, c, d; 85219089Spjd 86219089Spjd for (a = b = c = d = 0; ip < ipend; ip++) { 87219089Spjd a += BSWAP_32(ip[0]); 88219089Spjd b += a; 89219089Spjd c += b; 90219089Spjd d += c; 91219089Spjd } 92219089Spjd 93219089Spjd ZIO_SET_CHECKSUM(zcp, a, b, c, d); 94219089Spjd} 95