1/* ----------------------------------------------------------------------- *
2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 *
6 * This file is part of the Linux kernel, and is made available under
7 * the terms of the GNU General Public License version 2.
8 *
9 * ----------------------------------------------------------------------- */
10
11#include <linux/linkage.h>
12
13/*
14 * Memory copy routines
15 */
16
17 .code16
18 .text
19
20GLOBAL(memcpy)
21 pushw %si
22 pushw %di
23 movw %ax, %di
24 movw %dx, %si
25 pushw %cx
26 shrw $2, %cx
27 rep; movsl
28 popw %cx
29 andw $3, %cx
30 rep; movsb
31 popw %di
32 popw %si
33 retl
34ENDPROC(memcpy)
35
36GLOBAL(memset)
37 pushw %di
38 movw %ax, %di
39 movzbl %dl, %eax
40 imull $0x01010101,%eax
41 pushw %cx
42 shrw $2, %cx
43 rep; stosl
44 popw %cx
45 andw $3, %cx
46 rep; stosb
47 popw %di
48 retl
49ENDPROC(memset)
50
51GLOBAL(copy_from_fs)
52 pushw %ds
53 pushw %fs
54 popw %ds
55 calll memcpy
56 popw %ds
57 retl
58ENDPROC(copy_from_fs)
59
60GLOBAL(copy_to_fs)
61 pushw %es
62 pushw %fs
63 popw %es
64 calll memcpy
65 popw %es
66 retl
67ENDPROC(copy_to_fs)
68