strchr.S

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 *  linux/arch/arm/lib/strchr.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
14ENTRY(strchr)
15		and	r1, r1, #0xff
161:		ldrb	r2, [r0], #1
17		teq	r2, r1
18		teqne	r2, #0
19		bne	1b
20		teq	r2, r1
21		movne	r0, #0
22		subeq	r0, r0, #1
23		ret	lr
24ENDPROC(strchr)