blob: 17049a2d93a45973c74c9d93b788828d2db63131 [file] [log] [blame]
* linux/arch/arm26/lib/testchangebit.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>
eor r0, r0, #0x18 @ big endian byte ordering
add r1, r1, r0, lsr #3
and r3, r0, #7
mov r0, #1
save_and_disable_irqs ip, r2
ldrb r2, [r1]
tst r2, r0, lsl r3
eor r2, r2, r0, lsl r3
strb r2, [r1]
restore_irqs ip
moveq r0, #0