trapping_fp.h

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// This file's extension implies that it's C, but it's really -*- C++ -*-.
/*
 * Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration.
 */
 
 
#ifndef CXXUTILS_TRAPPING_FP_H
#define CXXUTILS_TRAPPING_FP_H
 
 
// Tell the compiler to optimize the containing block assuming that
// FP may trap.  This is sometimes needed with clang to avoid spurious FPEs
// resulting from auto-vectorization.
#if defined(__clang__) && defined(__x86_64__)
# define CXXUTILS_TRAPPING_FP _Pragma("float_control(except, on)") \
         class CxxUtilsTrappingFPDummy
#else
# define CXXUTILS_TRAPPING_FP class CxxUtilsTrappingFPDummy
#endif
 
 
#endif // not CXXUTILS_TRAPPING_FP_H