blob: 97395802c23c43fe4417e1e9369323bfb1991949 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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
7 .text
8 .align 32
9 .globl memmove
10 .type memmove,#function
11memmove: /* o0=dst o1=src o2=len */
12 mov %o0, %g1
13 cmp %o0, %o1
14 bleu,pt %xcc, memcpy
15 add %o1, %o2, %g7
16 cmp %g7, %o0
17 bleu,pt %xcc, memcpy
18 add %o0, %o2, %o5
19 sub %g7, 1, %o1
20
21 sub %o5, 1, %o0
221: ldub [%o1], %g7
23 subcc %o2, 1, %o2
24 sub %o1, 1, %o1
25 stb %g7, [%o0]
26 bne,pt %icc, 1b
27 sub %o0, 1, %o0
28
29 retl
30 mov %g1, %o0
31 .size memmove, .-memmove