atomic_dec.S revision 1.8.16.2
1 1.8.16.1 martin /* $NetBSD: atomic_dec.S,v 1.8.16.2 2020/04/21 19:37:47 martin Exp $ */ 2 1.2 ad 3 1.2 ad /*- 4 1.2 ad * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 1.2 ad * All rights reserved. 6 1.2 ad * 7 1.2 ad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 ad * by Jason R. Thorpe. 9 1.2 ad * 10 1.2 ad * Redistribution and use in source and binary forms, with or without 11 1.2 ad * modification, are permitted provided that the following conditions 12 1.2 ad * are met: 13 1.2 ad * 1. Redistributions of source code must retain the above copyright 14 1.2 ad * notice, this list of conditions and the following disclaimer. 15 1.2 ad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 ad * notice, this list of conditions and the following disclaimer in the 17 1.2 ad * documentation and/or other materials provided with the distribution. 18 1.2 ad * 19 1.2 ad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 ad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 ad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 ad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 ad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 ad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 ad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 ad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 ad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 ad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 ad * POSSIBILITY OF SUCH DAMAGE. 30 1.2 ad */ 31 1.2 ad 32 1.2 ad #include "atomic_op_asm.h" 33 1.2 ad 34 1.2 ad .text 35 1.2 ad 36 1.7 chs ENTRY(_atomic_dec_32) 37 1.2 ad ld [%o0], %o2 38 1.2 ad 1: add %o2, -1, %o3 39 1.2 ad cas [%o0], %o2, %o3 40 1.2 ad cmp %o2, %o3 41 1.2 ad bne,a,pn %icc, 1b 42 1.2 ad mov %o3, %o2 43 1.2 ad retl 44 1.2 ad add %o2, -1, %o0 45 1.3 ad ATOMIC_OP_ALIAS(atomic_dec_32,_atomic_dec_32) 46 1.3 ad ATOMIC_OP_ALIAS(atomic_dec_uint,_atomic_dec_32) 47 1.3 ad STRONG_ALIAS(_atomic_dec_uint,_atomic_dec_32) 48 1.3 ad 49 1.3 ad ATOMIC_OP_ALIAS(atomic_dec_32_nv,_atomic_dec_32) 50 1.3 ad STRONG_ALIAS(_atomic_dec_32_nv,_atomic_dec_32) 51 1.3 ad ATOMIC_OP_ALIAS(atomic_dec_uint_nv,_atomic_dec_32) 52 1.3 ad STRONG_ALIAS(_atomic_dec_uint_nv,_atomic_dec_32) 53 1.2 ad 54 1.7 chs ENTRY(_atomic_dec_64) 55 1.2 ad ldx [%o0], %o2 56 1.2 ad 1: add %o2, -1, %o3 57 1.2 ad casx [%o0], %o2, %o3 58 1.2 ad cmp %o2, %o3 59 1.5 nakayama bne,a,pn %xcc, 1b 60 1.2 ad mov %o3, %o2 61 1.8 nakayama #ifdef __arch64__ 62 1.2 ad retl 63 1.2 ad add %o2, -1, %o0 64 1.8 nakayama #else 65 1.8 nakayama add %o2, -1, %o0 66 1.8 nakayama SPLIT_RETL(%o0, %o0, %o1) 67 1.8 nakayama #endif 68 1.3 ad ATOMIC_OP_ALIAS(atomic_dec_64,_atomic_dec_64) 69 1.3 ad 70 1.3 ad ATOMIC_OP_ALIAS(atomic_dec_64_nv,_atomic_dec_64) 71 1.3 ad STRONG_ALIAS(_atomic_dec_64_nv,_atomic_dec_64) 72 1.4 mrg 73 1.4 mrg ATOMIC_OP_ALIAS_SIZE(atomic_dec_ulong,_atomic_dec) 74 1.4 mrg STRONG_ALIAS_SIZE(_atomic_dec_ulong,_atomic_dec) 75 1.4 mrg ATOMIC_OP_ALIAS_SIZE(atomic_dec_ptr,_atomic_dec) 76 1.4 mrg STRONG_ALIAS_SIZE(_atomic_dec_ptr,_atomic_dec) 77 1.4 mrg 78 1.4 mrg ATOMIC_OP_ALIAS_SIZE(atomic_dec_ulong_nv,_atomic_dec) 79 1.4 mrg STRONG_ALIAS_SIZE(_atomic_dec_ulong_nv,_atomic_dec) 80 1.4 mrg ATOMIC_OP_ALIAS_SIZE(atomic_dec_ptr_nv,_atomic_dec) 81 1.4 mrg STRONG_ALIAS_SIZE(_atomic_dec_ptr_nv,_atomic_dec) 82
Indexes created Fri Oct 03 23:09:56 GMT 2025