excepts.cxx

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/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/
 
// $Id$
#include "CxxUtils/excepts.h"
 
#ifdef __APPLE__
#include <fenv.h>
 
int
feenableexcept (unsigned int excepts)
{
   static fenv_t fenv;
   unsigned int new_excepts = excepts & FE_ALL_EXCEPT,
                old_excepts;  // previous masks
 
   if ( fegetenv (&fenv) ) return -1;
   old_excepts = fenv.__control & FE_ALL_EXCEPT;
 
   // unmask
   fenv.__control &= ~new_excepts;
   fenv.__mxcsr   &= ~(new_excepts << 7);
 
   return ( fesetenv (&fenv) ? -1 : old_excepts );
}
 
int
fedisableexcept (unsigned int excepts)
{
   static fenv_t fenv;
   unsigned int new_excepts = excepts & FE_ALL_EXCEPT,
                old_excepts;  // all previous masks
 
   if ( fegetenv (&fenv) ) return -1;
   old_excepts = fenv.__control & FE_ALL_EXCEPT;
 
   // mask
   fenv.__control |= new_excepts;
   fenv.__mxcsr   |= new_excepts << 7;
 
   return ( fesetenv (&fenv) ? -1 : old_excepts );
}
#endif