/* | |
* 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> | |
.text | |
ENTRY(_test_and_change_bit_be) | |
eor r0, r0, #0x18 @ big endian byte ordering | |
ENTRY(_test_and_change_bit_le) | |
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 | |
RETINSTR(mov,pc,lr) | |