https://github.com/torvalds/linux
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Tip revision: 33d930e59a98fa10a0db9f56c7fa2f21a4aef9b9 authored by Linus Torvalds on 16 October 2017, 01:01:12 UTC
Linux 4.14-rc5
Tip revision: 33d930e
strchr.S
/*
 *  linux/arch/arm/lib/strchr.S
 *
 *  Copyright (C) 1995-2000 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  ASM optimised string functions
 */
#include <linux/linkage.h>
#include <asm/assembler.h>

		.text
		.align	5
ENTRY(strchr)
		and	r1, r1, #0xff
1:		ldrb	r2, [r0], #1
		teq	r2, r1
		teqne	r2, #0
		bne	1b
		teq	r2, r1
		movne	r0, #0
		subeq	r0, r0, #1
		ret	lr
ENDPROC(strchr)
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