From 172bb4bd5e4afef721dd4d2972d8680d983f144b Mon Sep 17 00:00:00 2001 From: Brian Behlendorf Date: Thu, 11 Dec 2008 11:08:09 -0800 Subject: Move the world out of /zfs/ and seperate out module build tree --- module/zfs/fletcher.c | 145 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 145 insertions(+) create mode 100644 module/zfs/fletcher.c (limited to 'module/zfs/fletcher.c') diff --git a/module/zfs/fletcher.c b/module/zfs/fletcher.c new file mode 100644 index 000000000..edda3c9a9 --- /dev/null +++ b/module/zfs/fletcher.c @@ -0,0 +1,145 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2006 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +#include +#include +#include +#include + +void +fletcher_2_native(const void *buf, uint64_t size, zio_cksum_t *zcp) +{ + const uint64_t *ip = buf; + const uint64_t *ipend = ip + (size / sizeof (uint64_t)); + uint64_t a0, b0, a1, b1; + + for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) { + a0 += ip[0]; + a1 += ip[1]; + b0 += a0; + b1 += a1; + } + + ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1); +} + +void +fletcher_2_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp) +{ + const uint64_t *ip = buf; + const uint64_t *ipend = ip + (size / sizeof (uint64_t)); + uint64_t a0, b0, a1, b1; + + for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) { + a0 += BSWAP_64(ip[0]); + a1 += BSWAP_64(ip[1]); + b0 += a0; + b1 += a1; + } + + ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1); +} + +void +fletcher_4_native(const void *buf, uint64_t size, zio_cksum_t *zcp) +{ + const uint32_t *ip = buf; + const uint32_t *ipend = ip + (size / sizeof (uint32_t)); + uint64_t a, b, c, d; + + for (a = b = c = d = 0; ip < ipend; ip++) { + a += ip[0]; + b += a; + c += b; + d += c; + } + + ZIO_SET_CHECKSUM(zcp, a, b, c, d); +} + +void +fletcher_4_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp) +{ + const uint32_t *ip = buf; + const uint32_t *ipend = ip + (size / sizeof (uint32_t)); + uint64_t a, b, c, d; + + for (a = b = c = d = 0; ip < ipend; ip++) { + a += BSWAP_32(ip[0]); + b += a; + c += b; + d += c; + } + + ZIO_SET_CHECKSUM(zcp, a, b, c, d); +} + +void +fletcher_4_incremental_native(const void *buf, uint64_t size, + zio_cksum_t *zcp) +{ + const uint32_t *ip = buf; + const uint32_t *ipend = ip + (size / sizeof (uint32_t)); + uint64_t a, b, c, d; + + a = zcp->zc_word[0]; + b = zcp->zc_word[1]; + c = zcp->zc_word[2]; + d = zcp->zc_word[3]; + + for (; ip < ipend; ip++) { + a += ip[0]; + b += a; + c += b; + d += c; + } + + ZIO_SET_CHECKSUM(zcp, a, b, c, d); +} + +void +fletcher_4_incremental_byteswap(const void *buf, uint64_t size, + zio_cksum_t *zcp) +{ + const uint32_t *ip = buf; + const uint32_t *ipend = ip + (size / sizeof (uint32_t)); + uint64_t a, b, c, d; + + a = zcp->zc_word[0]; + b = zcp->zc_word[1]; + c = zcp->zc_word[2]; + d = zcp->zc_word[3]; + + for (; ip < ipend; ip++) { + a += BSWAP_32(ip[0]); + b += a; + c += b; + d += c; + } + + ZIO_SET_CHECKSUM(zcp, a, b, c, d); +} -- cgit v1.2.3