79 lines
2.7 KiB
ArmAsm
79 lines
2.7 KiB
ArmAsm
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/* $NetBSD: atomic_cas.S,v 1.5 2008/05/25 15:56:11 chs Exp $ */
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/*-
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* Copyright (c) 2007, 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "atomic_op_asm.h"
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.text
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LEAF(_atomic_cas_32, 3)
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1: mov a2, t2
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ldl_l v0, 0(a0)
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cmpeq v0, a1, t1
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beq t1, 2f
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stl_c t2, 0(a0)
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beq t2, 3f
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2: RET
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3: br 1b
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END(_atomic_cas_32)
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ATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32)
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ATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32)
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STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
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ATOMIC_OP_ALIAS(atomic_cas_32_ni,_atomic_cas_32)
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STRONG_ALIAS(_atomic_cas_32_ni,_atomic_cas_32)
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ATOMIC_OP_ALIAS(atomic_cas_uint_ni,_atomic_cas_32)
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STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32)
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LEAF(_atomic_cas_64, 3)
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1: mov a2, t2
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ldq_l v0, 0(a0)
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cmpeq v0, a1, t1
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beq t1, 2f
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stq_c t2, 0(a0)
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beq t2, 3f
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2: RET
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3: br 1b
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END(_atomic_cas_64)
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ATOMIC_OP_ALIAS(atomic_cas_64,_atomic_cas_64)
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ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_64)
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STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_64)
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ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_64)
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STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_64)
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ATOMIC_OP_ALIAS(atomic_cas_64_ni,_atomic_cas_64)
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STRONG_ALIAS(_atomic_cas_64_ni,_atomic_cas_64)
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ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_64)
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STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_64)
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ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_64)
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STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_64)
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