[deliverable/linux.git] / arch / sparc / lib / memmove.S

/* 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)
 */

#include <linux/linkage.h>

	.text
ENTRY(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
ENDPROC(memmove)
Commit	Line	Data
1da177e4 LT	1	/* memmove.S: Simple memmove implementation.
	2	*
	3	* Copyright (C) 1997, 2004 David S. Miller (davem@redhat.com)
	4	* Copyright (C) 1996, 1997, 1998, 1999 Jakub Jelinek (jj@ultra.linux.cz)
	5	*/
	6
8695c37d DM	7	#include <linux/linkage.h>
8695c37d DM	8
1da177e4	9	.text
8695c37d	10	ENTRY(memmove) /* o0=dst o1=src o2=len */
1da177e4 LT	11	mov %o0, %g1
	12	cmp %o0, %o1
	13	bleu,pt %xcc, memcpy
	14	add %o1, %o2, %g7
	15	cmp %g7, %o0
	16	bleu,pt %xcc, memcpy
	17	add %o0, %o2, %o5
	18	sub %g7, 1, %o1
	19
	20	sub %o5, 1, %o0
	21	1: ldub [%o1], %g7
	22	subcc %o2, 1, %o2
	23	sub %o1, 1, %o1
	24	stb %g7, [%o0]
	25	bne,pt %icc, 1b
	26	sub %o0, 1, %o0
	27
	28	retl
	29	mov %g1, %o0
8695c37d	30	ENDPROC(memmove)