1c81bd2c60
These files had tags after teh copyright notice, inside the comment block (incorrect, removed), and outside the comment block (correct). Approved by: rwatson (mentor)
48 lines
1.7 KiB
ArmAsm
48 lines
1.7 KiB
ArmAsm
/*
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* Copyright (c) 2002 Marcel Moolenaar
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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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*
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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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(LIBC_RCS) && !defined(lint)
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.text
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.asciz "$FreeBSD$"
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#endif /* LIBC_RCS and not lint */
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#include <machine/asm.h>
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/*
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* Atomicly lock a location with an identifier provided the location
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* is not currently locked.
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*
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* long _atomic_lock(long *);
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*/
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ENTRY(_atomic_lock, 1)
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mov ar.ccv = r0
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add r14 = 1, r0
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nop 0
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;;
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cmpxchg8.acq r8 = [r32], r14, ar.ccv
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br.ret.sptk rp
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END(_atomic_lock)
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