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      1  1.5  skrll /* $NetBSD: atomic_swap_16.S,v 1.5 2021/07/29 10:29:05 skrll Exp $ */
      2  1.1   matt 
      3  1.1   matt /*-
      4  1.1   matt  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  1.1   matt  * All rights reserved.
      6  1.1   matt  *
      7  1.1   matt  * This code is derived from software contributed to The NetBSD Foundation
      8  1.1   matt  * by Matt Thomas of 3am Software Foundry.
      9  1.1   matt  *
     10  1.1   matt  * Redistribution and use in source and binary forms, with or without
     11  1.1   matt  * modification, are permitted provided that the following conditions
     12  1.1   matt  * are met:
     13  1.1   matt  * 1. Redistributions of source code must retain the above copyright
     14  1.1   matt  *    notice, this list of conditions and the following disclaimer.
     15  1.1   matt  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1   matt  *    notice, this list of conditions and the following disclaimer in the
     17  1.1   matt  *    documentation and/or other materials provided with the distribution.
     18  1.1   matt  *
     19  1.1   matt  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.1   matt  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.1   matt  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.1   matt  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.1   matt  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.1   matt  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.1   matt  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.1   matt  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.1   matt  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.1   matt  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.1   matt  * POSSIBILITY OF SUCH DAMAGE.
     30  1.1   matt  */
     31  1.1   matt 
     32  1.1   matt #include "atomic_op_asm.h"
     33  1.1   matt 
     34  1.1   matt ENTRY_NP(_atomic_swap_16)
     35  1.1   matt 	mov	x4, x0
     36  1.1   matt 1:	ldxrh	w0, [x4]
     37  1.1   matt 	stxrh	w3, w1, [x4]
     38  1.2  skrll 	cbnz	w3, 2f
     39  1.1   matt 	ret
     40  1.2  skrll 2:	b	1b
     41  1.1   matt END(_atomic_swap_16)
     42  1.1   matt 
     43  1.1   matt ATOMIC_OP_ALIAS(atomic_swap_16,_atomic_swap_16)
     44  1.1   matt ATOMIC_OP_ALIAS(atomic_swap_short,_atomic_swap_16)
     45  1.1   matt ATOMIC_OP_ALIAS(atomic_swap_ushort,_atomic_swap_16)
     46  1.1   matt STRONG_ALIAS(_atomic_swap_short,_atomic_swap_16)
     47  1.1   matt STRONG_ALIAS(_atomic_swap_ushort,_atomic_swap_16)
     48  1.1   matt 
     49  1.5  skrll ENTRY_NP(__sync_lock_test_and_set_2)
     50  1.5  skrll 	mov	x4, x0
     51  1.5  skrll 1:	ldaxrh	w0, [x4]
     52  1.5  skrll 	stxrh	w3, w1, [x4]
     53  1.5  skrll 	cbnz	w3, 2f
     54  1.5  skrll 	ret
     55  1.5  skrll 2:	b	1b
     56  1.5  skrll END(__sync_lock_test_and_set_2)
     57  1.5  skrll 
     58  1.1   matt ENTRY_NP(__sync_lock_release_2)
     59  1.1   matt 	stlrh	wzr, [x0]
     60  1.1   matt 	ret
     61  1.1   matt END(__sync_lock_release_2)
     62