blob: 2506bd743ab4f159f70bb97fa1dce05cd778bd0f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/arch/arm26/lib/testclearbit.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
14ENTRY(_test_and_clear_bit_be)
15 eor r0, r0, #0x18 @ big endian byte ordering
16ENTRY(_test_and_clear_bit_le)
17 add r1, r1, r0, lsr #3 @ Get byte offset
18 and r3, r0, #7 @ Get bit offset
19 mov r0, #1
20 save_and_disable_irqs ip, r2
21 ldrb r2, [r1]
22 tst r2, r0, lsl r3
23 bic r2, r2, r0, lsl r3
24 strb r2, [r1]
25 restore_irqs ip
26 moveq r0, #0
27 RETINSTR(mov,pc,lr)
28
29