summaryrefslogtreecommitdiffstats
path: root/arch/sparc/lib/memmove.S
blob: 97395802c23c43fe4417e1e9369323bfb1991949 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
/* memmove.S: Simple memmove implementation.
 *
 * Copyright (C) 1997, 2004 David S. Miller (davem@redhat.com)
 * Copyright (C) 1996, 1997, 1998, 1999 Jakub Jelinek (jj@ultra.linux.cz)
 */

	.text
	.align		32
	.globl		memmove
	.type		memmove,#function
memmove:		/* o0=dst o1=src o2=len */
	mov		%o0, %g1
	cmp		%o0, %o1
	bleu,pt		%xcc, memcpy
	 add		%o1, %o2, %g7
	cmp		%g7, %o0
	bleu,pt		%xcc, memcpy
	 add		%o0, %o2, %o5
	sub		%g7, 1, %o1

	sub		%o5, 1, %o0
1:	ldub		[%o1], %g7
	subcc		%o2, 1, %o2
	sub		%o1, 1, %o1
	stb		%g7, [%o0]
	bne,pt		%icc, 1b
	 sub		%o0, 1, %o0

	retl
	 mov		%g1, %o0
	.size		memmove, .-memmove
OpenPOWER on IntegriCloud