1/* $NetBSD: atomic_cas.S,v 1.3 2012/03/14 16:50:34 christos Exp $ */ 2 3/*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <machine/asm.h> 30#include "atomic_op_asm.h" 31 32RCSID("$NetBSD: atomic_cas.S,v 1.3 2012/03/14 16:50:34 christos Exp $") 33 34 .text 35 .set noat 36 .set noreorder 37 .set nomacro 38 39LEAF(_atomic_cas_32) 401: INT_LL v0, 0(a0) 41 nop 42 bne v0, a1, 2f 43 nop 44 move t0, a2 45 INT_SC t0, 0(a0) 46 beq t0, zero, 1b 47 nop 48 move v0, a1 492: 50 j ra 51 nop 52END(_atomic_cas_32) 53ATOMIC_OP_ALIAS(atomic_cas_32, _atomic_cas_32) 54 55#if !defined(__mips_o32) 56LEAF(_atomic_cas_64) 571: REG_LL v0, 0(a0) 58 nop 59 bne v0, a1, 2f 60 nop 61 move t0, a2 62 REG_SC t0, 0(a0) 63 beq t0, zero, 1b 64 nop 65 move v0, a1 662: 67 j ra 68 nop 69END(_atomic_cas_64) 70ATOMIC_OP_ALIAS(atomic_cas_64, _atomic_cas_64) 71#endif 72 73#ifdef _LP64 74STRONG_ALIAS(_atomic_cas_ptr, _atomic_cas_64) 75STRONG_ALIAS(_atomic_cas_ptr_ni, _atomic_cas_64) 76STRONG_ALIAS(_atomic_cas_ulong, _atomic_cas_64) 77STRONG_ALIAS(_atomic_cas_ulong_ni, _atomic_cas_64) 78#else 79STRONG_ALIAS(_atomic_cas_ptr, _atomic_cas_32) 80STRONG_ALIAS(_atomic_cas_ptr_ni, _atomic_cas_32) 81STRONG_ALIAS(_atomic_cas_ulong, _atomic_cas_32) 82STRONG_ALIAS(_atomic_cas_ulong_ni, _atomic_cas_32) 83#endif 84STRONG_ALIAS(_atomic_cas_uint, _atomic_cas_32) 85STRONG_ALIAS(_atomic_cas_uint_ni, _atomic_cas_32) 86 87ATOMIC_OP_ALIAS(atomic_cas_ptr, _atomic_cas_ptr) 88ATOMIC_OP_ALIAS(atomic_cas_ptr_ni, _atomic_cas_ptr_ni) 89ATOMIC_OP_ALIAS(atomic_cas_uint, _atomic_cas_uint) 90ATOMIC_OP_ALIAS(atomic_cas_uint_ni, _atomic_cas_uint_ni) 91ATOMIC_OP_ALIAS(atomic_cas_ulong, _atomic_cas_ulong) 92ATOMIC_OP_ALIAS(atomic_cas_ulong_ni, _atomic_cas_ulong_ni) 93