1/* 2 * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29/*- 30 * Copyright (c) 1990 The Regents of the University of California. 31 * All rights reserved. 32 * 33 * This code is derived from locore.s. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 3. All advertising materials mentioning features or use of this software 44 * must display the following acknowledgement: 45 * This product includes software developed by the University of 46 * California, Berkeley and its contributors. 47 * 4. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 */ 63 64#include <sys/appleapiopts.h> 65#include <machine/cpu_capabilities.h> 66#include <machine/commpage.h> 67#include <machine/asm.h> 68 69 /* 70 * (ov)bcopy (src,dst,cnt) 71 * ws@tools.de (Wolfgang Solfrank, TooLs GmbH) +49-228-985800 72 */ 73 74.text 75.align 5, 0x90 76Lbcopy_scalar: 77 pushl %ebp /* set up a frame for backtraces */ 78 movl %esp,%ebp 79 pushl %esi 80 pushl %edi 81 movl 8(%ebp),%esi 82 movl 12(%ebp),%edi 83 jmp 1f 84/* 85** These need to be 32 bytes from Lbcopy_scalar 86*/ 87.align 5, 0x90 88Lmemcpy_scalar: 89Lmemmove_scalar: 90 pushl %ebp /* set up a frame for backtraces */ 91 movl %esp,%ebp 92 pushl %esi 93 pushl %edi 94 movl 8(%ebp),%edi 95 movl 12(%ebp),%esi 96 movl %edi,%eax 971: 98 movl 16(%ebp),%ecx 99 movl %edi,%edx 100 subl %esi,%edx 101 cmpl %ecx,%edx /* overlapping? */ 102 jb 2f 103 cld /* nope, copy forwards. */ 104 movl %ecx,%edx 105 shrl $2,%ecx /* copy by words */ 106 rep 107 movsl 108 movl %edx,%ecx 109 andl $3,%ecx /* any bytes left? */ 110 rep 111 movsb 112 popl %edi 113 popl %esi 114 popl %ebp 115 ret 1162: 117 addl %ecx,%edi /* copy backwards. */ 118 addl %ecx,%esi 119 std 120 movl %ecx,%edx 121 andl $3,%ecx /* any fractional bytes? */ 122 decl %edi 123 decl %esi 124 rep 125 movsb 126 movl %edx,%ecx /* copy remainder by words */ 127 shrl $2,%ecx 128 subl $3,%esi 129 subl $3,%edi 130 rep 131 movsl 132 popl %edi 133 popl %esi 134 popl %ebp 135 cld 136 ret 137 138 COMMPAGE_DESCRIPTOR(bcopy_scalar,_COMM_PAGE_BCOPY,0,kHasSSE2+kHasSupplementalSSE3) 139