1/* 2 * linux/arch/arm/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 30