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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/lib/strchr.S | |
3 | * | |
4 | * Copyright (C) 1995-2000 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * ASM optimised string functions | |
11 | */ | |
12 | #include <linux/linkage.h> | |
13 | #include <asm/assembler.h> | |
4dd1837d | 14 | #include <asm/export.h> |
1da177e4 LT |
15 | |
16 | .text | |
17 | .align 5 | |
18 | ENTRY(strchr) | |
19 | and r1, r1, #0xff | |
20 | 1: ldrb r2, [r0], #1 | |
21 | teq r2, r1 | |
22 | teqne r2, #0 | |
23 | bne 1b | |
24 | teq r2, r1 | |
25 | movne r0, #0 | |
26 | subeq r0, r0, #1 | |
6ebbf2ce | 27 | ret lr |
93ed3970 | 28 | ENDPROC(strchr) |
4dd1837d | 29 | EXPORT_SYMBOL(strchr) |