11da177e4SLinus Torvalds/* 21da177e4SLinus Torvalds * linux/arch/arm/lib/testchangebit.S 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 1995-1996 Russell King 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 71da177e4SLinus Torvalds * it under the terms of the GNU General Public License version 2 as 81da177e4SLinus Torvalds * published by the Free Software Foundation. 91da177e4SLinus Torvalds */ 101da177e4SLinus Torvalds#include <linux/linkage.h> 111da177e4SLinus Torvalds#include <asm/assembler.h> 121da177e4SLinus Torvalds .text 131da177e4SLinus Torvalds 141da177e4SLinus TorvaldsENTRY(_test_and_change_bit_be) 151da177e4SLinus Torvalds eor r0, r0, #0x18 @ big endian byte ordering 161da177e4SLinus TorvaldsENTRY(_test_and_change_bit_le) 171da177e4SLinus Torvalds add r1, r1, r0, lsr #3 181da177e4SLinus Torvalds and r3, r0, #7 191da177e4SLinus Torvalds mov r0, #1 201da177e4SLinus Torvalds save_and_disable_irqs ip, r2 211da177e4SLinus Torvalds ldrb r2, [r1] 221da177e4SLinus Torvalds tst r2, r0, lsl r3 231da177e4SLinus Torvalds eor r2, r2, r0, lsl r3 241da177e4SLinus Torvalds strb r2, [r1] 251da177e4SLinus Torvalds restore_irqs ip 261da177e4SLinus Torvalds moveq r0, #0 271da177e4SLinus Torvalds RETINSTR(mov,pc,lr) 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds 30