155 lines
3.4 KiB
C
155 lines
3.4 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#pragma ident "%Z%%M% %I% %E% SMI"
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#include <sys/types.h>
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#include <sys/sysmacros.h>
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#include <sys/byteorder.h>
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#include <sys/spa.h>
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void
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fletcher_2_native(const void *buf, uint64_t size, zio_cksum_t *zcp)
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{
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const uint64_t *ip = buf;
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const uint64_t *ipend = ip + (size / sizeof (uint64_t));
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uint64_t a0, b0, a1, b1;
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for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
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a0 += ip[0];
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a1 += ip[1];
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b0 += a0;
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b1 += a1;
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}
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ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1);
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}
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void
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fletcher_2_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp)
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{
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const uint64_t *ip = buf;
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const uint64_t *ipend = ip + (size / sizeof (uint64_t));
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uint64_t a0, b0, a1, b1;
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for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
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a0 += BSWAP_64(ip[0]);
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a1 += BSWAP_64(ip[1]);
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b0 += a0;
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b1 += a1;
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}
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ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1);
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}
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void
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fletcher_4_native(const void *buf, uint64_t size, zio_cksum_t *zcp)
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{
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const uint32_t *ip = buf;
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const uint32_t *ipend = ip + (size / sizeof (uint32_t));
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uint64_t a, b, c, d;
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for (a = b = c = d = 0; ip < ipend; ip++) {
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a += ip[0];
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b += a;
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c += b;
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d += c;
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}
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ZIO_SET_CHECKSUM(zcp, a, b, c, d);
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}
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void
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fletcher_4_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp)
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{
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const uint32_t *ip = buf;
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const uint32_t *ipend = ip + (size / sizeof (uint32_t));
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uint64_t a, b, c, d;
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for (a = b = c = d = 0; ip < ipend; ip++) {
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a += BSWAP_32(ip[0]);
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b += a;
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c += b;
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d += c;
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}
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ZIO_SET_CHECKSUM(zcp, a, b, c, d);
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}
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void
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fletcher_4_incremental_native(const void *buf, uint64_t size,
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zio_cksum_t *zcp)
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{
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const uint32_t *ip = buf;
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const uint32_t *ipend = ip + (size / sizeof (uint32_t));
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uint64_t a, b, c, d;
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a = zcp->zc_word[0];
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b = zcp->zc_word[1];
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c = zcp->zc_word[2];
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d = zcp->zc_word[3];
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for (; ip < ipend; ip++) {
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a += ip[0];
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b += a;
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c += b;
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d += c;
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}
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ZIO_SET_CHECKSUM(zcp, a, b, c, d);
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}
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void
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fletcher_4_incremental_byteswap(const void *buf, uint64_t size,
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zio_cksum_t *zcp)
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{
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const uint32_t *ip = buf;
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const uint32_t *ipend = ip + (size / sizeof (uint32_t));
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uint64_t a, b, c, d;
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a = zcp->zc_word[0];
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b = zcp->zc_word[1];
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c = zcp->zc_word[2];
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d = zcp->zc_word[3];
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for (; ip < ipend; ip++) {
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a += BSWAP_32(ip[0]);
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b += a;
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c += b;
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d += c;
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}
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ZIO_SET_CHECKSUM(zcp, a, b, c, d);
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}
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#if defined(_KERNEL) && defined(HAVE_SPL)
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EXPORT_SYMBOL(fletcher_2_native);
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EXPORT_SYMBOL(fletcher_2_byteswap);
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EXPORT_SYMBOL(fletcher_4_native);
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EXPORT_SYMBOL(fletcher_4_byteswap);
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EXPORT_SYMBOL(fletcher_4_incremental_native);
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EXPORT_SYMBOL(fletcher_4_incremental_byteswap);
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#endif
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