1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
---|---|
2 | /* |
3 | * linux/arch/arm/lib/memchr.S |
4 | * |
5 | * Copyright (C) 1995-2000 Russell King |
6 | * |
7 | * ASM optimised string functions |
8 | */ |
9 | #include <linux/linkage.h> |
10 | #include <asm/assembler.h> |
11 | |
12 | .text |
13 | .align 5 |
14 | ENTRY(memchr) |
15 | 1: subs r2, r2, #1 |
16 | bmi 2f |
17 | ldrb r3, [r0], #1 |
18 | teq r3, r1 |
19 | bne 1b |
20 | sub r0, r0, #1 |
21 | 2: movne r0, #0 |
22 | ret lr |
23 | ENDPROC(memchr) |
24 |