1/* $NetBSD: atomic_or_16.S,v 1.1 2013/11/08 22:42:52 matt Exp $ */ 2/*- 3 * Copyright (c) 2013 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Matt Thomas <matt@3am-software.com> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include "atomic_op_asm.h" 32 33#ifdef _ARM_ARCH_6 34 35ENTRY_NP(_atomic_or_16) 36 mov ip, r0 371: ldrexh r0, [ip] /* load old value (to be returned) */ 38 orrs r3, r0, r1 /* calculate new value */ 39 strexh r2, r3, [ip] /* try to store */ 40 cmp r2, #0 /* succeed? */ 41 bne 1b /* no, try again */ 42#ifdef _ARM_ARCH_7 43 dmb 44#else 45 mcr p15, 0, r2, c7, c10, 5 /* data memory barrier */ 46#endif 47 RET /* return old value */ 48END(_atomic_or_16) 49 50ATOMIC_OP_ALIAS(atomic_or_16,_atomic_or_16) 51ATOMIC_OP_ALIAS(atomic_or_ushort,_atomic_or_16) 52STRONG_ALIAS(__sync_fetch_and_or_2,_atomic_or_16) 53STRONG_ALIAS(_atomic_or_ushort,_atomic_or_16) 54 55ENTRY_NP(_atomic_or_16_nv) 56 mov ip, r0 /* need r0 for return value */ 571: ldrexh r0, [ip] /* load old value */ 58 orrs r0, r0, r1 /* calculate new value (return value) */ 59 strexh r2, r0, [ip] /* try to store */ 60 cmp r2, #0 /* succeed? */ 61 bne 1b /* no, try again? */ 62#ifdef _ARM_ARCH_7 63 dmb 64#else 65 mcr p15, 0, r2, c7, c10, 5 /* data memory barrier */ 66#endif 67 RET /* return new value */ 68END(_atomic_or_16_nv) 69 70ATOMIC_OP_ALIAS(atomic_or_16_nv,_atomic_or_16_nv) 71ATOMIC_OP_ALIAS(atomic_or_ushort_nv,_atomic_or_16_nv) 72STRONG_ALIAS(__sync_or_and_fetch_2,_atomic_or_16_nv) 73STRONG_ALIAS(_atomic_or_ushort_nv,_atomic_or_16_nv) 74 75#endif /* _ARM_ARCH_6 */ 76