1/* $NetBSD: atomic_sub.S,v 1.3 2014/06/23 21:53:45 joerg Exp $ */ 2 3/*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 34 .text 35 .align 2 36 37ENTRY(_atomic_sub_32) 38 movl 4(%sp), %a0 39 movl 8(%sp), %d0 40 subl %d0, (%a0) 41 rts 42END(_atomic_sub_32) 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) 46ATOMIC_OP_ALIAS(atomic_sub_long,_atomic_sub_32) 47STRONG_ALIAS(_atomic_sub_long,_atomic_sub_32) 48ATOMIC_OP_ALIAS(atomic_sub_ptr,_atomic_sub_32) 49STRONG_ALIAS(_atomic_sub_ptr,_atomic_sub_32) 50 51ENTRY(_atomic_sub_32_nv) 52 movl 4(%sp), %a0 531: movl (%a0), %d0 54 movl %d0, %d1 55 subl 8(%sp), %d0 56 casl %d1, %d0, (%a0) 57 bne 1b 58 movl %d0, %a0 /* pointers return also in %a0 */ 59 rts 60END(_atomic_sub_32_nv) 61 62ATOMIC_OP_ALIAS(atomic_sub_32_nv,_atomic_sub_32_nv) 63ATOMIC_OP_ALIAS(atomic_sub_int_nv,_atomic_sub_32_nv) 64STRONG_ALIAS(_atomic_sub_int_nv,_atomic_sub_32_nv) 65ATOMIC_OP_ALIAS(atomic_sub_long_nv,_atomic_sub_32_nv) 66STRONG_ALIAS(_atomic_sub_long_nv,_atomic_sub_32_nv) 67ATOMIC_OP_ALIAS(atomic_sub_ptr_nv,_atomic_sub_32_nv) 68STRONG_ALIAS(_atomic_sub_ptr_nv,_atomic_sub_32_nv) 69CRT_ALIAS(__sync_sub_and_fetch_4,_atomic_sub_32_nv) 70 71ENTRY(__sync_fetch_and_sub_4) 72 movl 4(%sp), %a0 731: movl (%a0), %d0 74 movl %d0, %d1 75 subl 8(%sp), %d1 76 casl %d0, %d1, (%a0) 77 bne 1b 78 movl %d0, %a0 /* pointers return also in %a0 */ 79 rts 80END(__sync_fetch_and_sub_4) 81 82ENTRY(_atomic_sub_16_nv) 83 movl 4(%sp), %a0 841: movw (%a0), %d0 85 movw %d0, %d1 86 subw 8(%sp), %d0 87 casw %d1, %d0, (%a0) 88 bne 1b 89 rts 90END(_atomic_sub_16_nv) 91 92CRT_ALIAS(__sync_sub_and_fetch_2,_atomic_sub_16_nv) 93 94ENTRY(__sync_fetch_and_sub_2) 95 movl 4(%sp), %a0 961: movw (%a0), %d0 97 movw %d0, %d1 98 subw 8(%sp), %d1 99 casw %d0, %d1, (%a0) 100 bne 1b 101 rts 102END(__sync_fetch_and_sub_2) 103 104ENTRY(_atomic_sub_8_nv) 105 movl 4(%sp), %a0 1061: movb (%a0), %d0 107 movb %d0, %d1 108 subb 8(%sp), %d0 109 casb %d1, %d0, (%a0) 110 bne 1b 111 rts 112END(_atomic_sub_8_nv) 113 114CRT_ALIAS(__sync_sub_and_fetch_1,_atomic_sub_8_nv) 115 116ENTRY(__sync_fetch_and_sub_1) 117 movl 4(%sp), %a0 1181: movb (%a0), %d0 119 movb %d0, %d1 120 subb 8(%sp), %d1 121 casb %d0, %d1, (%a0) 122 bne 1b 123 rts 124END(__sync_fetch_and_sub_1) 125 126CRT_ALIAS(__atomic_fetch_sub_1,__sync_fetch_and_sub_1) 127CRT_ALIAS(__atomic_fetch_sub_2,__sync_fetch_and_sub_2) 128CRT_ALIAS(__atomic_fetch_sub_4,__sync_fetch_and_sub_4) 129