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/* ieee-utils/fp-gnusparc.c
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000 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 2 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 <stdio.h>
#include <fpu_control.h>
#include <gsl/gsl_errno.h>
#include <gsl/gsl_ieee_utils.h>
int
gsl_ieee_set_mode (int precision, int rounding, int exception_mask)
{
unsigned short mode = 0 ;
switch (precision)
{
case GSL_IEEE_SINGLE_PRECISION:
mode |= _FPU_SINGLE ;
break ;
case GSL_IEEE_DOUBLE_PRECISION:
mode |= _FPU_DOUBLE ;
break ;
case GSL_IEEE_EXTENDED_PRECISION:
mode |= _FPU_EXTENDED ;
break ;
default:
mode |= _FPU_EXTENDED ;
}
switch (rounding)
{
case GSL_IEEE_ROUND_TO_NEAREST:
mode |= _FPU_RC_NEAREST ;
break ;
case GSL_IEEE_ROUND_DOWN:
mode |= _FPU_RC_DOWN ;
break ;
case GSL_IEEE_ROUND_UP:
mode |= _FPU_RC_UP ;
break ;
case GSL_IEEE_ROUND_TO_ZERO:
mode |= _FPU_RC_ZERO ;
break ;
default:
mode |= _FPU_RC_NEAREST ;
}
if (exception_mask & GSL_IEEE_MASK_INVALID)
mode |= _FPU_MASK_IM ;
if (exception_mask & GSL_IEEE_MASK_DENORMALIZED)
{
/* do nothing */
}
else
{
GSL_ERROR ("sparc 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 |= _FPU_MASK_ZM ;
if (exception_mask & GSL_IEEE_MASK_OVERFLOW)
mode |= _FPU_MASK_OM ;
if (exception_mask & GSL_IEEE_MASK_UNDERFLOW)
mode |= _FPU_MASK_UM ;
if (exception_mask & GSL_IEEE_TRAP_INEXACT)
{
mode &= ~ _FPU_MASK_PM ;
}
else
{
mode |= _FPU_MASK_PM ;
}
_FPU_SETCW(mode) ;
return GSL_SUCCESS ;
}
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