1/* SPDX-License-Identifier: GPL-2.0-only */
2/* ----------------------------------------------------------------------- *
3 *
4 *   Copyright (C) 1991, 1992 Linus Torvalds
5 *   Copyright 2007 rPath, Inc. - All Rights Reserved
6 *
7 * ----------------------------------------------------------------------- */
8
9#include <linux/linkage.h>
10
11/*
12 * Memory copy routines
13 */
14
15	.code16
16	.text
17
18GLOBAL(memcpy)
19	pushw	%si
20	pushw	%di
21	movw	%ax, %di
22	movw	%dx, %si
23	pushw	%cx
24	shrw	$2, %cx
25	rep; movsl
26	popw	%cx
27	andw	$3, %cx
28	rep; movsb
29	popw	%di
30	popw	%si
31	retl
32ENDPROC(memcpy)
33
34GLOBAL(memset)
35	pushw	%di
36	movw	%ax, %di
37	movzbl	%dl, %eax
38	imull	$0x01010101,%eax
39	pushw	%cx
40	shrw	$2, %cx
41	rep; stosl
42	popw	%cx
43	andw	$3, %cx
44	rep; stosb
45	popw	%di
46	retl
47ENDPROC(memset)
48
49GLOBAL(copy_from_fs)
50	pushw	%ds
51	pushw	%fs
52	popw	%ds
53	calll	memcpy
54	popw	%ds
55	retl
56ENDPROC(copy_from_fs)
57
58GLOBAL(copy_to_fs)
59	pushw	%es
60	pushw	%fs
61	popw	%es
62	calll	memcpy
63	popw	%es
64	retl
65ENDPROC(copy_to_fs)
66