/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* */ #include <i386/asm.h> /* void *memcpy((void *) to, (const void *) from, (size_t) bcount) */ ENTRY(memcpy) pushl %edi pushl %esi movl 8+ 4(%esp),%edi /* to */ movl %edi,%eax /* returns its first argument */ movl 8+ 8(%esp),%esi /* from */ memcpy_common: movl 8+ 12(%esp),%edx /* number of bytes */ cld /* move longs*/ movl %edx,%ecx sarl $2,%ecx rep movsl /* move bytes*/ movl %edx,%ecx andl $3,%ecx rep movsb popl %esi popl %edi ret /* void bcopy((const char *) from, (char *) to, (unsigned int) count) */ ENTRY(bcopy_no_overwrite) pushl %edi pushl %esi movl 8+ 8(%esp),%edi /* to */ movl 8+ 4(%esp),%esi /* from */ jmp memcpy_common /* bcopy16(from, to, bcount) using word moves */ ENTRY(bcopy16) pushl %edi pushl %esi movl 8+12(%esp),%edx /* 8 for the two pushes above */ movl 8+ 8(%esp),%edi movl 8+ 4(%esp),%esi /* move words */ 0: cld movl %edx,%ecx sarl $1,%ecx rep movsw /* move bytes */ movl %edx,%ecx andl $1,%ecx rep movsb popl %esi popl %edi ret