atomic_cas_32.S revision 1.3
1/* $NetBSD: atomic_cas_32.S,v 1.3 2019/04/17 07:35:38 mrg Exp $ */ 2/*- 3 * Copyright (c) 2014 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 33ENTRY_NP(_atomic_cas_32) 34 mv t0, a0 351: lr.w a0, 0(t0) 36 bne a1, a0, 2f 37 sc.w t1, a2, 0(t0) 38 bnez t1, 1b 392: 40 ret 41END(_atomic_cas_32) 42 43ATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32) 44ATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32) 45STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32) 46 47ATOMIC_OP_ALIAS(atomic_cas_32_ni,_atomic_cas_32) 48STRONG_ALIAS(_atomic_cas_32_ni,_atomic_cas_32) 49ATOMIC_OP_ALIAS(atomic_cas_uint_ni,_atomic_cas_32) 50STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32) 51 52#ifndef _LP64 53ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_32) 54STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_32) 55ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_32) 56STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_32) 57ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_32) 58STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_32) 59ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_32) 60STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_32) 61#endif 62CRT_ALIAS(__sync_val_compare_and_swap_4,_atomic_cas_32) 63 64ENTRY_NP(_atomic_bool_cas_32) 65 mv t0, a0 66 li a0, 0 671: lr.w t1, 0(t0) 68 bne a1, t1, 2f 69 sc.w t1, a2, 0(t0) 70 bnez t1, 1b 71 li a0, 1 722: 73 ret 74END(_atomic_bool_cas_32) 75 76ATOMIC_OP_ALIAS(atomic_bool_cas_32,_atomic_bool_cas_32) 77CRT_ALIAS(__bool_val_compare_and_swap_4,_atomic_bool_cas_32) 78