| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
| 11 | memmove: /* 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 |
| 22 | 1: 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 |