|
Packit |
67cb25 |
/* ieee-utils/fp-darwin.c
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* Copyright (C) 2001 Rodney Sparapani <rsparapa@mcw.edu>
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* This program is free software; you can redistribute it and/or modify
|
|
Packit |
67cb25 |
* it under the terms of the GNU General Public License as published by
|
|
Packit |
67cb25 |
* the Free Software Foundation; either version 3 of the License, or (at
|
|
Packit |
67cb25 |
* your option) any later version.
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* This program is distributed in the hope that it will be useful, but
|
|
Packit |
67cb25 |
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
67cb25 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
67cb25 |
* General Public License for more details.
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* You should have received a copy of the GNU General Public License
|
|
Packit |
67cb25 |
* along with this program; if not, write to the Free Software
|
|
Packit |
67cb25 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
Packit |
67cb25 |
*/
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
#include <architecture/ppc/fp_regs.h>
|
|
Packit |
67cb25 |
#include <gsl/gsl_ieee_utils.h>
|
|
Packit |
67cb25 |
#include <gsl/gsl_errno.h>
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
int
|
|
Packit |
67cb25 |
gsl_ieee_set_mode (int precision, int rounding, int exception_mask)
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
ppc_fp_scr_t fp_scr = get_fp_scr() ;
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
switch (precision)
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
case GSL_IEEE_SINGLE_PRECISION:
|
|
Packit |
67cb25 |
GSL_ERROR ("powerpc only supports default precision rounding", GSL_EUNSUP);
|
|
Packit |
67cb25 |
break ;
|
|
Packit |
67cb25 |
case GSL_IEEE_DOUBLE_PRECISION:
|
|
Packit |
67cb25 |
GSL_ERROR ("powerpc only supports default precision rounding", GSL_EUNSUP);
|
|
Packit |
67cb25 |
break ;
|
|
Packit |
67cb25 |
case GSL_IEEE_EXTENDED_PRECISION:
|
|
Packit |
67cb25 |
GSL_ERROR ("powerpc only supports default precision rounding", GSL_EUNSUP);
|
|
Packit |
67cb25 |
break ;
|
|
Packit |
67cb25 |
}
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
switch (rounding)
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
case GSL_IEEE_ROUND_TO_NEAREST:
|
|
Packit |
67cb25 |
fp_scr.rn = RN_NEAREST ;
|
|
Packit |
67cb25 |
break ;
|
|
Packit |
67cb25 |
case GSL_IEEE_ROUND_DOWN:
|
|
Packit |
67cb25 |
fp_scr.rn = RN_TOWARD_MINUS ;
|
|
Packit |
67cb25 |
break ;
|
|
Packit |
67cb25 |
case GSL_IEEE_ROUND_UP:
|
|
Packit |
67cb25 |
fp_scr.rn = RN_TOWARD_PLUS ;
|
|
Packit |
67cb25 |
break ;
|
|
Packit |
67cb25 |
case GSL_IEEE_ROUND_TO_ZERO:
|
|
Packit |
67cb25 |
fp_scr.rn = RN_TOWARD_ZERO ;
|
|
Packit |
67cb25 |
break ;
|
|
Packit |
67cb25 |
default:
|
|
Packit |
67cb25 |
fp_scr.rn = RN_NEAREST ;
|
|
Packit |
67cb25 |
}
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
if (exception_mask & GSL_IEEE_MASK_INVALID)
|
|
Packit |
67cb25 |
fp_scr.ve = 0 ; //ve bit: invalid op exception enable
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
if (exception_mask & GSL_IEEE_MASK_DENORMALIZED)
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
/* do nothing */
|
|
Packit |
67cb25 |
}
|
|
Packit |
67cb25 |
else
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
GSL_ERROR ("powerpc does not support the denormalized operand exception. "
|
|
Packit |
67cb25 |
"Use 'mask-denormalized' to work around this.", GSL_EUNSUP) ;
|
|
Packit |
67cb25 |
}
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
if (exception_mask & GSL_IEEE_MASK_DIVISION_BY_ZERO)
|
|
Packit |
67cb25 |
fp_scr.ze = 0 ; //ze bit: zero divide exception enable
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
if (exception_mask & GSL_IEEE_MASK_OVERFLOW)
|
|
Packit |
67cb25 |
fp_scr.oe = 0 ; //oe bit: overflow exception enable
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
if (exception_mask & GSL_IEEE_MASK_UNDERFLOW)
|
|
Packit |
67cb25 |
fp_scr.ue = 0 ; //ue bit: underflow exception enable
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
if (exception_mask & GSL_IEEE_TRAP_INEXACT)
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
fp_scr.xe = 1 ; //xe bit: inexact exception enable
|
|
Packit |
67cb25 |
}
|
|
Packit |
67cb25 |
else
|
|
Packit |
67cb25 |
{
|
|
Packit |
67cb25 |
fp_scr.xe = 01 ;
|
|
Packit |
67cb25 |
}
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
set_fp_scr(fp_scr);
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
return GSL_SUCCESS ;
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
}
|