| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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) | ||||