/* ieee-utils/fp-hpux11.c
*
* Copyright (C) 2001, 2007 Brian Gough
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <math.h>
#include <stdio.h>
#include <fenv.h>
#include <gsl/gsl_ieee_utils.h>
#include <gsl/gsl_errno.h>
int
gsl_ieee_set_mode (int precision, int rounding, int exception_mask)
{
int mode;
switch (precision)
{
case GSL_IEEE_SINGLE_PRECISION:
GSL_ERROR ("HPUX PA-RISC only supports default precision rounding",
GSL_EUNSUP) ;
break ;
case GSL_IEEE_DOUBLE_PRECISION:
GSL_ERROR ("HPUX PA-RISC only supports default precision rounding",
GSL_EUNSUP) ;
break ;
case GSL_IEEE_EXTENDED_PRECISION:
GSL_ERROR ("HPUX PA-RISC only supports default precision rounding",
GSL_EUNSUP) ;
break ;
}
switch (rounding)
{
case GSL_IEEE_ROUND_TO_NEAREST:
fesetround (FE_TONEAREST) ;
break ;
case GSL_IEEE_ROUND_DOWN:
fesetround (FE_DOWNWARD) ;
break ;
case GSL_IEEE_ROUND_UP:
fesetround (FE_UPWARD) ;
break ;
case GSL_IEEE_ROUND_TO_ZERO:
fesetround (FE_TOWARDZERO) ;
break ;
default:
fesetround (FE_TONEAREST) ;
}
/* Turn on all the exceptions apart from 'inexact' */
mode = FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW ;
if (exception_mask & GSL_IEEE_MASK_INVALID)
mode &= ~ FE_INVALID ;
if (exception_mask & GSL_IEEE_MASK_DENORMALIZED)
{
/* do nothing */
}
else
{
GSL_ERROR ("HP-UX does not support the denormalized operand exception. "
"Use 'mask-denormalized' to work around this.",
GSL_EUNSUP) ;
}
if (exception_mask & GSL_IEEE_MASK_DIVISION_BY_ZERO)
mode &= ~ FE_DIVBYZERO ;
if (exception_mask & GSL_IEEE_MASK_OVERFLOW)
mode &= ~ FE_OVERFLOW ;
if (exception_mask & GSL_IEEE_MASK_UNDERFLOW)
mode &= ~ FE_UNDERFLOW ;
if (exception_mask & GSL_IEEE_TRAP_INEXACT)
{
mode |= FE_INEXACT ;
}
else
{
mode &= ~ FE_INEXACT ;
}
fesettrapenable (mode) ;
return GSL_SUCCESS ;
}