swh:1:snp:c2847dfd741eae21606027cf29250d1ebcd63fb4
Raw File
Tip revision: 1def630a6a49dda5bc89dfbd86656293640456f0 authored by Linus Torvalds on 06 June 2006, 00:57:02 UTC
Linux 2.6.17-rc6
Tip revision: 1def630
testclearbit.S
/*
 *  linux/arch/arm26/lib/testclearbit.S
 *
 *  Copyright (C) 1995-1996 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.
 */
#include <linux/linkage.h>
#include <asm/assembler.h>
                .text

ENTRY(_test_and_clear_bit_be)
		eor	r0, r0, #0x18		@ big endian byte ordering
ENTRY(_test_and_clear_bit_le)
		add	r1, r1, r0, lsr #3	@ Get byte offset
		and	r3, r0, #7		@ Get bit offset
		mov	r0, #1
		save_and_disable_irqs ip, r2
		ldrb	r2, [r1]
		tst	r2, r0, lsl r3
		bic	r2, r2, r0, lsl r3
		strb	r2, [r1]
		restore_irqs ip
		moveq	r0, #0
		RETINSTR(mov,pc,lr)


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