2012-11-15 12:06:41 +01:00
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/* $NetBSD: atomic_cas.S,v 1.3 2012/03/14 16:50:34 christos Exp $ */
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2011-02-14 20:36:03 +01:00
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/*-
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* Copyright (c) 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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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 <machine/asm.h>
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#include "atomic_op_asm.h"
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2012-11-15 12:06:41 +01:00
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RCSID("$NetBSD: atomic_cas.S,v 1.3 2012/03/14 16:50:34 christos Exp $")
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2011-02-14 20:36:03 +01:00
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.text
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.set noat
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.set noreorder
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.set nomacro
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LEAF(_atomic_cas_32)
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1: INT_LL v0, 0(a0)
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nop
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bne v0, a1, 2f
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nop
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move t0, a2
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INT_SC t0, 0(a0)
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beq t0, zero, 1b
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nop
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move v0, a1
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2:
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j ra
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nop
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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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#if !defined(__mips_o32)
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LEAF(_atomic_cas_64)
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1: REG_LL v0, 0(a0)
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nop
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bne v0, a1, 2f
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nop
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move t0, a2
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REG_SC t0, 0(a0)
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beq t0, zero, 1b
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nop
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move v0, a1
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2:
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j ra
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nop
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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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#endif
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#ifdef _LP64
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STRONG_ALIAS(_atomic_cas_ptr, _atomic_cas_64)
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STRONG_ALIAS(_atomic_cas_ptr_ni, _atomic_cas_64)
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STRONG_ALIAS(_atomic_cas_ulong, _atomic_cas_64)
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STRONG_ALIAS(_atomic_cas_ulong_ni, _atomic_cas_64)
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#else
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STRONG_ALIAS(_atomic_cas_ptr, _atomic_cas_32)
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STRONG_ALIAS(_atomic_cas_ptr_ni, _atomic_cas_32)
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STRONG_ALIAS(_atomic_cas_ulong, _atomic_cas_32)
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STRONG_ALIAS(_atomic_cas_ulong_ni, _atomic_cas_32)
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#endif
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STRONG_ALIAS(_atomic_cas_uint, _atomic_cas_32)
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STRONG_ALIAS(_atomic_cas_uint_ni, _atomic_cas_32)
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ATOMIC_OP_ALIAS(atomic_cas_ptr, _atomic_cas_ptr)
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ATOMIC_OP_ALIAS(atomic_cas_ptr_ni, _atomic_cas_ptr_ni)
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ATOMIC_OP_ALIAS(atomic_cas_uint, _atomic_cas_uint)
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ATOMIC_OP_ALIAS(atomic_cas_uint_ni, _atomic_cas_uint_ni)
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ATOMIC_OP_ALIAS(atomic_cas_ulong, _atomic_cas_ulong)
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ATOMIC_OP_ALIAS(atomic_cas_ulong_ni, _atomic_cas_ulong_ni)
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