1/* $NetBSD: atomic_sub_32.S,v 1.1 2014/09/19 17:36:24 matt Exp $ */ 2 3/*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include "atomic_op_asm.h" 33 34ENTRY_NP(_atomic_dec_32) 35 li a1, 1 36ENTRY_NP(_atomic_sub_32) 37 INT_SUB t0, zero, a1 38 amoadd.w.aq a0, t0, 0(a0) 39 ret 40END(_atomic_sub_32) 41END(_atomic_dec_32) 42 43ATOMIC_OP_ALIAS(atomic_sub_32,_atomic_sub_32) 44ATOMIC_OP_ALIAS(atomic_sub_int,_atomic_sub_32) 45STRONG_ALIAS(_atomic_sub_int,_atomic_sub_32) 46#ifndef _LP64 47ATOMIC_OP_ALIAS(atomic_sub_long,_atomic_sub_32) 48STRONG_ALIAS(_atomic_sub_long,_atomic_sub_32) 49ATOMIC_OP_ALIAS(atomic_sub_ptr,_atomic_sub_32) 50STRONG_ALIAS(_atomic_sub_ptr,_atomic_sub_32) 51#endif 52CRT_ALIAS(__sync_fetch_and_sub_4,_atomic_sub_32) 53CRT_ALIAS(__atomic_fetch_sub_4,_atomic_sub_32) 54 55ATOMIC_OP_ALIAS(atomic_dec_32,_atomic_dec_32) 56ATOMIC_OP_ALIAS(atomic_dec_uint,_atomic_dec_32) 57STRONG_ALIAS(_atomic_dec_uint,_atomic_dec_32) 58#ifndef _LP64 59ATOMIC_OP_ALIAS(atomic_dec_ulong,_atomic_dec_32) 60STRONG_ALIAS(_atomic_dec_ulong,_atomic_dec_32) 61ATOMIC_OP_ALIAS(atomic_dec_ptr,_atomic_dec_32) 62STRONG_ALIAS(_atomic_dec_ptr,_atomic_dec_32) 63#endif 64 65ENTRY_NP(_atomic_dec_32_nv) 66 li a1, 1 67ENTRY_NP(_atomic_sub_32_nv) 68 INT_SUB t1, zero, a1 69 amoadd.w.aq t0, t1, 0(a0) /* update memory and get old value */ 70 INT_ADD a0, t0, t1 /* turn into new value */ 71 ret 72END(_atomic_sub_32_nv) 73END(_atomic_dec_32_nv) 74 75ATOMIC_OP_ALIAS(atomic_sub_32_nv,_atomic_sub_32_nv) 76ATOMIC_OP_ALIAS(atomic_sub_int_nv,_atomic_sub_32_nv) 77STRONG_ALIAS(_atomic_sub_int_nv,_atomic_sub_32_nv) 78#ifndef _LP64 79ATOMIC_OP_ALIAS(atomic_sub_long_nv,_atomic_sub_32_nv) 80STRONG_ALIAS(_atomic_sub_long_nv,_atomic_sub_32_nv) 81ATOMIC_OP_ALIAS(atomic_sub_ptr_nv,_atomic_sub_32_nv) 82STRONG_ALIAS(_atomic_sub_ptr_nv,_atomic_sub_32_nv) 83#endif 84CRT_ALIAS(__sync_sub_and_fetch_4,_atomic_sub_32_nv) 85CRT_ALIAS(__atomic_sub_fetch_4,_atomic_sub_32_nv) 86 87ATOMIC_OP_ALIAS(atomic_dec_32_nv,_atomic_dec_32_nv) 88ATOMIC_OP_ALIAS(atomic_dec_uint_nv,_atomic_dec_32_nv) 89STRONG_ALIAS(_atomic_dec_uint_nv,_atomic_dec_32_nv) 90#ifndef _LP64 91ATOMIC_OP_ALIAS(atomic_dec_ulong_nv,_atomic_dec_32_nv) 92STRONG_ALIAS(_atomic_dec_ulong_nv,_atomic_dec_32_nv) 93ATOMIC_OP_ALIAS(atomic_dec_ptr_nv,_atomic_dec_32_nv) 94STRONG_ALIAS(_atomic_dec_ptr_nv,_atomic_dec_32_nv) 95#endif 96