arch/arm/lib/strrchr.S


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 *  linux/arch/arm/lib/strrchr.S
 *
 *  Copyright (C) 1995-2000 Russell King
 *
 *  ASM optimised string functions
 */
#include <linux/linkage.h>
#include <asm/assembler.h>

		.text
		.align	5
ENTRY(strrchr)
		mov	r3, #0
1:		ldrb	r2, [r0], #1
		teq	r2, r1
		subeq	r3, r0, #1
		teq	r2, #0
		bne	1b
		mov	r0, r3
		ret	lr
ENDPROC(strrchr)