1/* $NetBSD: atomic_cas.S,v 1.4 2015/06/01 23:16:54 matt 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 1.4 2015/06/01 23:16:54 matt 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 49#ifdef _MIPS_ARCH_OCTEONP 50 syncw 51#endif 522: 53 j ra 54 nop 55END(_atomic_cas_32) 56ATOMIC_OP_ALIAS(atomic_cas_32, _atomic_cas_32) 57 58#if !defined(__mips_o32) 59LEAF(_atomic_cas_64) 601: REG_LL v0, 0(a0) 61 nop 62 bne v0, a1, 2f 63 nop 64 move t0, a2 65 REG_SC t0, 0(a0) 66 beq t0, zero, 1b 67 nop 68 move v0, a1 69#ifdef _MIPS_ARCH_OCTEONP 70 syncw 71#endif 722: 73 j ra 74 nop 75END(_atomic_cas_64) 76ATOMIC_OP_ALIAS(atomic_cas_64, _atomic_cas_64) 77#endif 78 79#ifdef _LP64 80STRONG_ALIAS(_atomic_cas_ptr, _atomic_cas_64) 81STRONG_ALIAS(_atomic_cas_ptr_ni, _atomic_cas_64) 82STRONG_ALIAS(_atomic_cas_ulong, _atomic_cas_64) 83STRONG_ALIAS(_atomic_cas_ulong_ni, _atomic_cas_64) 84#else 85STRONG_ALIAS(_atomic_cas_ptr, _atomic_cas_32) 86STRONG_ALIAS(_atomic_cas_ptr_ni, _atomic_cas_32) 87STRONG_ALIAS(_atomic_cas_ulong, _atomic_cas_32) 88STRONG_ALIAS(_atomic_cas_ulong_ni, _atomic_cas_32) 89#endif 90STRONG_ALIAS(_atomic_cas_uint, _atomic_cas_32) 91STRONG_ALIAS(_atomic_cas_uint_ni, _atomic_cas_32) 92 93ATOMIC_OP_ALIAS(atomic_cas_ptr, _atomic_cas_ptr) 94ATOMIC_OP_ALIAS(atomic_cas_ptr_ni, _atomic_cas_ptr_ni) 95ATOMIC_OP_ALIAS(atomic_cas_uint, _atomic_cas_uint) 96ATOMIC_OP_ALIAS(atomic_cas_uint_ni, _atomic_cas_uint_ni) 97ATOMIC_OP_ALIAS(atomic_cas_ulong, _atomic_cas_ulong) 98ATOMIC_OP_ALIAS(atomic_cas_ulong_ni, _atomic_cas_ulong_ni) 99