1/*
2 *  linux/arch/arm/lib/testclearbit.S
3 *
4 *  Copyright (C) 1995-1996 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10#include <linux/linkage.h>
11#include <asm/assembler.h>
12                .text
13
14ENTRY(test_and_clear_bit)
15		add	r1, r1, r0, lsr #3	@ Get byte offset
16		and	r3, r0, #7		@ Get bit offset
17		mov	r0, #1
18		save_and_disable_irqs ip, r2
19		ldrb	r2, [r1]
20		tst	r2, r0, lsl r3
21		bic	r2, r2, r0, lsl r3
22		strb	r2, [r1]
23		restore_irqs ip
24		moveq	r0, #0
25		RETINSTR(mov,pc,lr)
26
27
28