1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
/*
* linux/arch/arm26/lib/testsetbit.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_set_bit_be)
eor r0, r0, #0x18 @ big endian byte ordering
ENTRY(_test_and_set_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
orr r2, r2, r0, lsl r3
strb r2, [r1]
restore_irqs ip
moveq r0, #0
RETINSTR(mov,pc,lr)
|
