1/*
2 * Copyright (C) 2013 ARM Ltd.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
15 */
16
17#include <linux/linkage.h>
18#include <asm/assembler.h>
19
20/*
21 * Fill in the buffer with character c (alignment handled by the hardware)
22 *
23 * Parameters:
24 *	x0 - buf
25 *	x1 - c
26 *	x2 - n
27 * Returns:
28 *	x0 - buf
29 */
30ENTRY(memset)
31	mov	x4, x0
32	and	w1, w1, #0xff
33	orr	w1, w1, w1, lsl #8
34	orr	w1, w1, w1, lsl #16
35	orr	x1, x1, x1, lsl #32
36	subs	x2, x2, #8
37	b.mi	2f
381:	str	x1, [x4], #8
39	subs	x2, x2, #8
40	b.pl	1b
412:	adds	x2, x2, #4
42	b.mi	3f
43	sub	x2, x2, #4
44	str	w1, [x4], #4
453:	adds	x2, x2, #2
46	b.mi	4f
47	sub	x2, x2, #2
48	strh	w1, [x4], #2
494:	adds	x2, x2, #1
50	b.mi	5f
51	strb	w1, [x4]
525:	ret
53ENDPROC(memset)
54