1/*
2 * Copyright (c) 2000 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 * @OSF_COPYRIGHT@
30 */
31/*
32 * Mach Operating System
33 * Copyright (c) 1991,1990 Carnegie Mellon University
34 * All Rights Reserved.
35 *
36 * Permission to use, copy, modify and distribute this software and its
37 * documentation is hereby granted, provided that both the copyright
38 * notice and this permission notice appear in all copies of the
39 * software, derivative works or modified versions, and any portions
40 * thereof, and that both notices appear in supporting documentation.
41 *
42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
43 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
45 *
46 * Carnegie Mellon requests users of this software to return to
47 *
48 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
49 *  School of Computer Science
50 *  Carnegie Mellon University
51 *  Pittsburgh PA 15213-3890
52 *
53 * any improvements or extensions that they make and grant Carnegie Mellon
54 * the rights to redistribute these changes.
55 */
56/*
57 */
58
59#include <i386/asm.h>
60
61/*
62 * void *memset(void * addr, int pattern, size_t length)
63 */
64
65ENTRY(memset)
66	pushl	%edi
67	movl	4+ 4(%esp),%edi		/* addr */
68	movb	4+ 8(%esp),%al		/* pattern */
69	movl	4+ 12(%esp),%edx	/* length */
70	movb	%al,%ah
71	movw	%ax,%cx
72	shll	$16,%eax
73	movw	%cx,%ax
74	cld
75/* zero longs */
76	movl	%edx,%ecx
77	shrl	$2,%ecx
78	rep
79	stosl
80/* zero bytes */
81	movl	%edx,%ecx
82	andl	$3,%ecx
83	rep
84	stosb
85	movl	4+ 4(%esp),%eax		/* returns its first argument */
86	popl	%edi
87	ret
88
89/*
90 * void bzero(char * addr, size_t length)
91 */
92Entry(blkclr)
93ENTRY2(bzero,__bzero)
94	pushl	%edi
95	movl	4+ 4(%esp),%edi		/* addr */
96	movl	4+ 8(%esp),%edx		/* length */
97	xorl	%eax,%eax
98	cld
99/* zero longs */
100	movl	%edx,%ecx
101	shrl	$2,%ecx
102	rep
103	stosl
104/* zero bytes */
105	movl	%edx,%ecx
106	andl	$3,%ecx
107	rep
108	stosb
109	popl	%edi
110	ret
111