60485ff95f
OMPI_* to OPAL_*. This allows opal layer to be used more independent from the whole of ompi. NOTE: 9 "svn mv" operations immediately follow this commit. This commit was SVN r21180.
59 строки
1.4 KiB
C
59 строки
1.4 KiB
C
/*
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* Copyright (c) 2004-2006 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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/** @file
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*
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* Compiler-specific prefetch functions
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*
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* A small set of prefetch / prediction interfaces for using compiler
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* directives to improve memory prefetching and branch prediction
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*/
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#ifndef OPAL_PREFETCH_H
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#define OPAL_PREFETCH_H
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#if defined(c_plusplus) || defined(__cplusplus)
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/* C++ code */
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#if OMPI_CXX_HAVE_BUILTIN_EXPECT
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#define OPAL_LIKELY(expression) __builtin_expect(!!(expression), 1)
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#define OPAL_UNLIKELY(expression) __builtin_expect(!!(expression), 0)
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#else
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#define OPAL_LIKELY(expression) (expression)
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#define OPAL_UNLIKELY(expression) (expression)
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#endif
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#if OMPI_CXX_HAVE_BUILTIN_PREFETCH
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#define OPAL_PREFETCH(address,rw,locality) __builtin_prefetch(address,rw,locality)
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#else
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#define OPAL_PREFETCH(address,rw,locality)
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#endif
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#else
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/* C code */
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#if OPAL_C_HAVE_BUILTIN_EXPECT
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#define OPAL_LIKELY(expression) __builtin_expect(!!(expression), 1)
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#define OPAL_UNLIKELY(expression) __builtin_expect(!!(expression), 0)
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#else
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#define OPAL_LIKELY(expression) (expression)
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#define OPAL_UNLIKELY(expression) (expression)
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#endif
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#if OPAL_C_HAVE_BUILTIN_PREFETCH
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#define OPAL_PREFETCH(address,rw,locality) __builtin_prefetch(address,rw,locality)
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#else
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#define OPAL_PREFETCH(address,rw,locality)
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#endif
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#endif
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#endif
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