| Current Path : /usr/include/x86_64-linux-gnu/openmpi/openmpi/opal/ |
Linux ift1.ift-informatik.de 5.4.0-216-generic #236-Ubuntu SMP Fri Apr 11 19:53:21 UTC 2025 x86_64 |
| Current File : //usr/include/x86_64-linux-gnu/openmpi/openmpi/opal/prefetch.h |
/* * Copyright (c) 2004-2006 The Regents of the University of California. * All rights reserved. * $COPYRIGHT$ * * Additional copyrights may follow * * $HEADER$ */ /** @file * * Compiler-specific prefetch functions * * A small set of prefetch / prediction interfaces for using compiler * directives to improve memory prefetching and branch prediction */ #ifndef OPAL_PREFETCH_H #define OPAL_PREFETCH_H #if defined(c_plusplus) || defined(__cplusplus) /* C++ code */ #if OMPI_CXX_HAVE_BUILTIN_EXPECT #define OPAL_LIKELY(expression) __builtin_expect(!!(expression), 1) #define OPAL_UNLIKELY(expression) __builtin_expect(!!(expression), 0) #else #define OPAL_LIKELY(expression) (expression) #define OPAL_UNLIKELY(expression) (expression) #endif #if OMPI_CXX_HAVE_BUILTIN_PREFETCH #define OPAL_PREFETCH(address,rw,locality) __builtin_prefetch(address,rw,locality) #else #define OPAL_PREFETCH(address,rw,locality) #endif #else /* C code */ #if OPAL_C_HAVE_BUILTIN_EXPECT #define OPAL_LIKELY(expression) __builtin_expect(!!(expression), 1) #define OPAL_UNLIKELY(expression) __builtin_expect(!!(expression), 0) #else #define OPAL_LIKELY(expression) (expression) #define OPAL_UNLIKELY(expression) (expression) #endif #if OPAL_C_HAVE_BUILTIN_PREFETCH #define OPAL_PREFETCH(address,rw,locality) __builtin_prefetch(address,rw,locality) #else #define OPAL_PREFETCH(address,rw,locality) #endif #endif #endif