1N/A/*
1N/A * GRUB -- GRand Unified Bootloader
1N/A * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
1N/A *
1N/A * This program is free software; you can redistribute it and/or modify
1N/A * it under the terms of the GNU General Public License as published by
1N/A * the Free Software Foundation; either version 2 of the License, or
1N/A * (at your option) any later version.
1N/A *
1N/A * This program is distributed in the hope that it will be useful,
1N/A * but WITHOUT ANY WARRANTY; without even the implied warranty of
1N/A * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1N/A * GNU General Public License for more details.
1N/A *
1N/A * You should have received a copy of the GNU General Public License
1N/A * along with this program; if not, write to the Free Software
1N/A * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
1N/A */
1N/A/*
1N/A * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
1N/A * Use is subject to license terms.
1N/A */
1N/A
1N/A#pragma ident "%Z%%M% %I% %E% SMI"
1N/A
1N/A#include "fsys_zfs.h"
1N/A
1N/A
1N/Avoid
1N/Afletcher_2_native(const void *buf, uint64_t size, zio_cksum_t *zcp)
1N/A{
1N/A const uint64_t *ip = buf;
1N/A const uint64_t *ipend = ip + (size / sizeof (uint64_t));
1N/A uint64_t a0, b0, a1, b1;
1N/A
1N/A for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
1N/A a0 += ip[0];
1N/A a1 += ip[1];
1N/A b0 += a0;
1N/A b1 += a1;
1N/A }
1N/A
1N/A ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1);
1N/A}
1N/A
1N/Avoid
1N/Afletcher_2_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp)
1N/A{
1N/A const uint64_t *ip = buf;
1N/A const uint64_t *ipend = ip + (size / sizeof (uint64_t));
1N/A uint64_t a0, b0, a1, b1;
1N/A
1N/A for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
1N/A a0 += BSWAP_64(ip[0]);
1N/A a1 += BSWAP_64(ip[1]);
1N/A b0 += a0;
1N/A b1 += a1;
1N/A }
1N/A
1N/A ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1);
1N/A}
1N/A
1N/Avoid
1N/Afletcher_4_native(const void *buf, uint64_t size, zio_cksum_t *zcp)
1N/A{
1N/A const uint32_t *ip = buf;
1N/A const uint32_t *ipend = ip + (size / sizeof (uint32_t));
1N/A uint64_t a, b, c, d;
1N/A
1N/A for (a = b = c = d = 0; ip < ipend; ip++) {
1N/A a += ip[0];
1N/A b += a;
1N/A c += b;
1N/A d += c;
1N/A }
1N/A
1N/A ZIO_SET_CHECKSUM(zcp, a, b, c, d);
1N/A}
1N/A
1N/Avoid
1N/Afletcher_4_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp)
1N/A{
1N/A const uint32_t *ip = buf;
1N/A const uint32_t *ipend = ip + (size / sizeof (uint32_t));
1N/A uint64_t a, b, c, d;
1N/A
1N/A for (a = b = c = d = 0; ip < ipend; ip++) {
1N/A a += BSWAP_32(ip[0]);
1N/A b += a;
1N/A c += b;
1N/A d += c;
1N/A }
1N/A
1N/A ZIO_SET_CHECKSUM(zcp, a, b, c, d);
1N/A}