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/arch/arm26/lib/setbit.S

https://bitbucket.org/evzijst/gittest
Assembly | 29 lines | 28 code | 1 blank | 0 comment | 0 complexity | 57db7885ff9c92d5e8b1da8978e51fcb MD5 | raw file
 1/*
 2 *  linux/arch/arm26/lib/setbit.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
14/*
15 * Purpose  : Function to set a bit
16 * Prototype: int set_bit(int bit, void *addr)
17 */
18ENTRY(_set_bit_be)
19		eor	r0, r0, #0x18		@ big endian byte ordering
20ENTRY(_set_bit_le)
21		and	r2, r0, #7
22		mov	r3, #1
23		mov	r3, r3, lsl r2
24		save_and_disable_irqs ip, r2
25		ldrb	r2, [r1, r0, lsr #3]
26		orr	r2, r2, r3
27		strb	r2, [r1, r0, lsr #3]
28		restore_irqs ip
29		RETINSTR(mov,pc,lr)