mirror of https://gitee.com/openkylin/linux.git
24 lines
373 B
ArmAsm
24 lines
373 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* linux/arch/arm/lib/memchr.S
|
|
*
|
|
* Copyright (C) 1995-2000 Russell King
|
|
*
|
|
* ASM optimised string functions
|
|
*/
|
|
#include <linux/linkage.h>
|
|
#include <asm/assembler.h>
|
|
|
|
.text
|
|
.align 5
|
|
ENTRY(memchr)
|
|
1: subs r2, r2, #1
|
|
bmi 2f
|
|
ldrb r3, [r0], #1
|
|
teq r3, r1
|
|
bne 1b
|
|
sub r0, r0, #1
|
|
2: movne r0, #0
|
|
ret lr
|
|
ENDPROC(memchr)
|