1/* $NetBSD: atomic_cas.S,v 1.8 2020/08/06 10:00:21 skrll 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 1.8 2020/08/06 10:00:21 skrll Exp $") 33 34 .text 35 .set noat 36 .set noreorder 37 .set nomacro 38 39LEAF(_atomic_cas_32) 40 LLSCSYNC 411: INT_LL v0, 0(a0) 42 nop 43 bne v0, a1, 2f 44 nop 45 move t0, a2 46 INT_SC t0, 0(a0) 47 beq t0, zero, 1b 48 nop 49 move v0, a1 50#ifdef _MIPS_ARCH_OCTEONP 51 syncw 52#endif 532: 54 j ra 55 nop 56END(_atomic_cas_32) 57ATOMIC_OP_ALIAS(atomic_cas_32, _atomic_cas_32) 58ATOMIC_OP_ALIAS(atomic_cas_32_ni, _atomic_cas_32) 59 60#if !defined(__mips_o32) 61LEAF(_atomic_cas_64) 62 LLSCSYNC 631: REG_LL v0, 0(a0) 64 nop 65 bne v0, a1, 2f 66 nop 67 move t0, a2 68 REG_SC t0, 0(a0) 69 beq t0, zero, 1b 70 nop 71 move v0, a1 72#ifdef _MIPS_ARCH_OCTEONP 73 syncw 74#endif 752: 76 j ra 77 nop 78END(_atomic_cas_64) 79ATOMIC_OP_ALIAS(atomic_cas_64, _atomic_cas_64) 80ATOMIC_OP_ALIAS(atomic_cas_64_ni, _atomic_cas_64) 81#endif 82 83#ifdef _LP64 84STRONG_ALIAS(_atomic_cas_ptr, _atomic_cas_64) 85STRONG_ALIAS(_atomic_cas_ptr_ni, _atomic_cas_64) 86STRONG_ALIAS(_atomic_cas_ulong, _atomic_cas_64) 87STRONG_ALIAS(_atomic_cas_ulong_ni, _atomic_cas_64) 88#else 89STRONG_ALIAS(_atomic_cas_ptr, _atomic_cas_32) 90STRONG_ALIAS(_atomic_cas_ptr_ni, _atomic_cas_32) 91STRONG_ALIAS(_atomic_cas_ulong, _atomic_cas_32) 92STRONG_ALIAS(_atomic_cas_ulong_ni, _atomic_cas_32) 93#endif 94STRONG_ALIAS(_atomic_cas_uint, _atomic_cas_32) 95STRONG_ALIAS(_atomic_cas_uint_ni, _atomic_cas_32) 96 97ATOMIC_OP_ALIAS(atomic_cas_ptr, _atomic_cas_ptr) 98ATOMIC_OP_ALIAS(atomic_cas_ptr_ni, _atomic_cas_ptr_ni) 99ATOMIC_OP_ALIAS(atomic_cas_uint, _atomic_cas_uint) 100ATOMIC_OP_ALIAS(atomic_cas_uint_ni, _atomic_cas_uint_ni) 101ATOMIC_OP_ALIAS(atomic_cas_ulong, _atomic_cas_ulong) 102ATOMIC_OP_ALIAS(atomic_cas_ulong_ni, _atomic_cas_ulong_ni) 103