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/*
Copyright (C) 1996-2013 John W. Eaton
This file is part of Octave.
Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <cstdlib>
#include <limits>
#include "lo-error.h"
#include "lo-ieee.h"
#include "mach-info.h"
void
octave_ieee_init (void)
{
oct_mach_info::float_format ff = oct_mach_info::native_float_format ();
switch (ff)
{
case oct_mach_info::flt_fmt_ieee_big_endian:
case oct_mach_info::flt_fmt_ieee_little_endian:
{
octave_NaN = std::numeric_limits<double>::quiet_NaN ();
octave_Inf = std::numeric_limits<double>::infinity ();
octave_Float_NaN = std::numeric_limits<float>::quiet_NaN ();
octave_Float_Inf = std::numeric_limits<float>::infinity ();
// The following is patterned after code in R.
if (ff == oct_mach_info::flt_fmt_ieee_big_endian)
{
lo_ieee_hw = 0;
lo_ieee_lw = 1;
}
else
{
lo_ieee_hw = 1;
lo_ieee_lw = 0;
}
lo_ieee_double t;
t.word[lo_ieee_hw] = LO_IEEE_NA_HW;
t.word[lo_ieee_lw] = LO_IEEE_NA_LW;
octave_NA = t.value;
lo_ieee_float tf;
tf.word = LO_IEEE_NA_FLOAT;
octave_Float_NA = tf.value;
}
break;
default:
// If the format is unknown, then you will probably not have a
// useful system, so we will abort here. Anyone wishing to
// experiment with building Octave on a system without IEEE
// floating point should be capable of removing this check and
// the configure test.
(*current_liboctave_error_handler)
("lo_ieee_init: floating point format is not IEEE! Maybe DLAMCH is miscompiled, or you are using some strange system without IEEE floating point math?");
abort ();
}
}
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