1 /* ieee-utils/fp-gnuppc.c
3 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Brian Gough, John Fisher
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3 of the License, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21 #include <fpu_control.h>
22 #include <gsl/gsl_errno.h>
23 #include <gsl/gsl_ieee_utils.h>
27 * Identical to fp-gnux86.c, except with references to
28 * _FPU_SINGLE, _FPU_DOUBLE, _FPU_EXTENDED, _FPU_MASK_DM
29 * and _FPU_MASK_PM converted to errors.
33 gsl_ieee_set_mode (int precision, int rounding, int exception_mask)
35 unsigned short mode = 0 ;
39 case GSL_IEEE_SINGLE_PRECISION:
40 GSL_ERROR ("powerpc only supports default precision rounding", GSL_EUNSUP);
42 case GSL_IEEE_DOUBLE_PRECISION:
43 GSL_ERROR ("powerpc only supports default precision rounding", GSL_EUNSUP);
45 case GSL_IEEE_EXTENDED_PRECISION:
46 GSL_ERROR ("powerpc only supports default precision rounding", GSL_EUNSUP);
52 case GSL_IEEE_ROUND_TO_NEAREST:
53 mode |= _FPU_RC_NEAREST ;
55 case GSL_IEEE_ROUND_DOWN:
56 mode |= _FPU_RC_DOWN ;
58 case GSL_IEEE_ROUND_UP:
61 case GSL_IEEE_ROUND_TO_ZERO:
62 mode |= _FPU_RC_ZERO ;
65 mode |= _FPU_RC_NEAREST ;
68 if (exception_mask & GSL_IEEE_MASK_INVALID)
69 mode |= _FPU_MASK_IM ;
71 if (exception_mask & GSL_IEEE_MASK_DENORMALIZED)
77 GSL_ERROR ("powerpc does not support the denormalized operand exception. "
78 "Use 'mask-denormalized' to work around this.", GSL_EUNSUP) ;
81 if (exception_mask & GSL_IEEE_MASK_DIVISION_BY_ZERO)
82 mode |= _FPU_MASK_ZM ;
84 if (exception_mask & GSL_IEEE_MASK_OVERFLOW)
85 mode |= _FPU_MASK_OM ;
87 if (exception_mask & GSL_IEEE_MASK_UNDERFLOW)
88 mode |= _FPU_MASK_UM ;
90 if (exception_mask & GSL_IEEE_TRAP_INEXACT)
92 GSL_ERROR ("powerpc does not support traps for inexact operations", GSL_EUNSUP) ;