1 /* 2 * GRUB -- GRand Unified Bootloader 3 * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 */ 19 /* 20 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 21 * Use is subject to license terms. 22 */ 23 24 #pragma ident "%Z%%M% %I% %E% SMI" 25 26 #include "fsys_zfs.h" 27 28 29 void 30 fletcher_2_native(const void *buf, uint64_t size, zio_cksum_t *zcp) 31 { 32 const uint64_t *ip = buf; 33 const uint64_t *ipend = ip + (size / sizeof (uint64_t)); 34 uint64_t a0, b0, a1, b1; 35 36 for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) { 37 a0 += ip[0]; 38 a1 += ip[1]; 39 b0 += a0; 40 b1 += a1; 41 } 42 43 ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1); 44 } 45 46 void 47 fletcher_2_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp) 48 { 49 const uint64_t *ip = buf; 50 const uint64_t *ipend = ip + (size / sizeof (uint64_t)); 51 uint64_t a0, b0, a1, b1; 52 53 for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) { 54 a0 += BSWAP_64(ip[0]); 55 a1 += BSWAP_64(ip[1]); 56 b0 += a0; 57 b1 += a1; 58 } 59 60 ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1); 61 } 62 63 void 64 fletcher_4_native(const void *buf, uint64_t size, zio_cksum_t *zcp) 65 { 66 const uint32_t *ip = buf; 67 const uint32_t *ipend = ip + (size / sizeof (uint32_t)); 68 uint64_t a, b, c, d; 69 70 for (a = b = c = d = 0; ip < ipend; ip++) { 71 a += ip[0]; 72 b += a; 73 c += b; 74 d += c; 75 } 76 77 ZIO_SET_CHECKSUM(zcp, a, b, c, d); 78 } 79 80 void 81 fletcher_4_byteswap(const void *buf, uint64_t size, zio_cksum_t *zcp) 82 { 83 const uint32_t *ip = buf; 84 const uint32_t *ipend = ip + (size / sizeof (uint32_t)); 85 uint64_t a, b, c, d; 86 87 for (a = b = c = d = 0; ip < ipend; ip++) { 88 a += BSWAP_32(ip[0]); 89 b += a; 90 c += b; 91 d += c; 92 } 93 94 ZIO_SET_CHECKSUM(zcp, a, b, c, d); 95 } 96