atomic_swap.S revision 1.8
11.8Sriastrad/* $NetBSD: atomic_swap.S,v 1.8 2022/02/27 19:21:53 riastradh Exp $ */ 21.2Smatt 31.2Smatt/*- 41.2Smatt * Copyright (c) 2008 The NetBSD Foundation, Inc. 51.2Smatt * All rights reserved. 61.2Smatt * 71.2Smatt * Redistribution and use in source and binary forms, with or without 81.2Smatt * modification, are permitted provided that the following conditions 91.2Smatt * are met: 101.2Smatt * 1. Redistributions of source code must retain the above copyright 111.2Smatt * notice, this list of conditions and the following disclaimer. 121.2Smatt * 2. Redistributions in binary form must reproduce the above copyright 131.2Smatt * notice, this list of conditions and the following disclaimer in the 141.2Smatt * documentation and/or other materials provided with the distribution. 151.6Sskrll * 161.2Smatt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 171.2Smatt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 181.2Smatt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 191.2Smatt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 201.2Smatt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 211.2Smatt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 221.2Smatt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 231.2Smatt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 241.2Smatt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 251.2Smatt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 261.2Smatt * POSSIBILITY OF SUCH DAMAGE. 271.2Smatt */ 281.2Smatt 291.2Smatt#include <machine/asm.h> 301.2Smatt#include "atomic_op_asm.h" 311.2Smatt 321.8SriastradRCSID("$NetBSD: atomic_swap.S,v 1.8 2022/02/27 19:21:53 riastradh Exp $") 331.2Smatt 341.2Smatt .text 351.3Sbouyer .set noreorder 361.3Sbouyer#ifdef _KERNEL_OPT 371.3Sbouyer#include "opt_cputype.h" 381.3Sbouyer#ifndef MIPS3_LOONGSON2F 391.3Sbouyer .set noat 401.3Sbouyer .set nomacro 411.3Sbouyer#endif 421.3Sbouyer#else /* _KERNEL_OPT */ 431.2Smatt .set noat 441.2Smatt .set nomacro 451.3Sbouyer#endif /* _KERNEL_OPT */ 461.3Sbouyer 471.2SmattLEAF(_atomic_swap_32) 481.7Sskrll LLSCSYNC 491.2Smatt1: INT_LL v0, 0(a0) 501.2Smatt nop 511.2Smatt move t0, a1 521.2Smatt INT_SC t0, 0(a0) 531.2Smatt beq t0, zero, 1b 541.2Smatt nop 551.2Smatt2: 561.2Smatt j ra 571.8Sriastrad BDSYNC_PLUNGER 581.2SmattEND(_atomic_swap_32) 591.2SmattATOMIC_OP_ALIAS(atomic_swap_32, _atomic_swap_32) 601.2Smatt 611.2Smatt#if !defined(__mips_o32) 621.2SmattLEAF(_atomic_swap_64) 631.7Sskrll LLSCSYNC 641.2Smatt1: REG_LL v0, 0(a0) 651.2Smatt nop 661.2Smatt move t0, a1 671.2Smatt REG_SC t0, 0(a0) 681.2Smatt beq t0, zero, 1b 691.2Smatt nop 701.2Smatt2: 711.2Smatt j ra 721.8Sriastrad BDSYNC_PLUNGER 731.2SmattEND(_atomic_swap_64) 741.2SmattATOMIC_OP_ALIAS(atomic_swap_64, _atomic_swap_64) 751.2Smatt#endif 761.2Smatt 771.2Smatt#ifdef _LP64 781.2SmattSTRONG_ALIAS(_atomic_swap_ptr, _atomic_swap_64) 791.2SmattSTRONG_ALIAS(_atomic_swap_ulong, _atomic_swap_64) 801.2Smatt#else 811.2SmattSTRONG_ALIAS(_atomic_swap_ptr, _atomic_swap_32) 821.2SmattSTRONG_ALIAS(_atomic_swap_ulong, _atomic_swap_32) 831.2Smatt#endif 841.2SmattSTRONG_ALIAS(_atomic_swap_uint, _atomic_swap_32) 851.2Smatt 861.2SmattATOMIC_OP_ALIAS(atomic_swap_ptr, _atomic_swap_ptr) 871.2SmattATOMIC_OP_ALIAS(atomic_swap_uint, _atomic_swap_uint) 881.2SmattATOMIC_OP_ALIAS(atomic_swap_ulong, _atomic_swap_ulong) 89