mutex_setbit64.il
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: mutex_setbit64.il,v 1.1 2003/10/30 18:37:01 nhart Exp $
- *
- * Portions Copyright (c) 1995-2003 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
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- * Source License (the "RPSL") available at
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- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
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- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
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- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
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- * ***** END LICENSE BLOCK ***** */
- /*
- * mutex_setbit64.il
- *
- * Solaris/SPARC inline assembly mutex routines (64-bit compiler mode)
- *
- * Note: These are implemented using the standard SPARC leaf procedure
- * optimization, so the %o "output" registers are acutally our input and
- * local registers.
- *
- */
- /***********************************************************************
- * extern "C" int _HXMutexSetBitCAS(HX_MUTEX pLock) %o0
- *
- * Test-and-Set primitive op based on CAS.
- *
- * This implementation is based on an example from The SPARC Architecture
- * Manual V9, pg. 318.
- * This is implemented using the SPARC leaf procedure optimization.
- * This is implemented using CAS which is not available on older processors.
- */
- .inline _HXMutexSetBitCAS,8 /* one 64-bit ptr arg == 8 bytes */
- mov 1,%o1
- cas [%o0],%g0,%o1
- mov %o1,%o0
- membar #LoadLoad | #LoadStore
- .end
- /***********************************************************************
- * extern "C" int _HXMutexClearBit(HX_MUTEX pLock) %o0
- *
- * Note: This is implemented using the standard SPARC leaf procedure
- * optimization, so the %o "output" registers are acutally our
- * input and local registers.
- *
- * Note: this implementation is based on an example from
- * The SPARC Architecture Manual V9, pg. 318.
- */
- .inline _HXMutexClearBit,8 /* one 64-bit arg == 8 bytes */
- membar #StoreStore
- membar #LoadStore
- stw %g0,[%o0]
- .end