Root/arch/sparc/lib/memmove.S

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
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
32

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