| /* fp-netbsd.c |
| * |
| * Copyright (C) 2001 Jason Beegan |
| * |
| * 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 <ieeefp.h> |
| #include <gsl/gsl_ieee_utils.h> |
| #include <gsl/gsl_errno.h> |
| |
| int |
| gsl_ieee_set_mode (int precision, int rounding, int exception_mask) |
| { |
| fp_except mode = 0; |
| fp_rnd rnd = 0; |
| |
| switch (precision) |
| { |
| case GSL_IEEE_SINGLE_PRECISION: |
| GSL_ERROR ("NetBSD only supports default precision rounding", |
| GSL_EUNSUP); |
| break; |
| case GSL_IEEE_DOUBLE_PRECISION: |
| GSL_ERROR ("NetBSD only supports default precision rounding", |
| GSL_EUNSUP); |
| break; |
| case GSL_IEEE_EXTENDED_PRECISION: |
| GSL_ERROR ("NetBSD only supports default precision rounding", |
| GSL_EUNSUP); |
| break; |
| } |
| |
| switch (rounding) |
| { |
| case GSL_IEEE_ROUND_TO_NEAREST: |
| rnd = FP_RN; |
| fpsetround (rnd); |
| break; |
| case GSL_IEEE_ROUND_DOWN: |
| rnd = FP_RM; |
| fpsetround (rnd); |
| break; |
| case GSL_IEEE_ROUND_UP: |
| rnd = FP_RP; |
| fpsetround (rnd); |
| break; |
| case GSL_IEEE_ROUND_TO_ZERO: |
| rnd = FP_RZ; |
| fpsetround (rnd); |
| break; |
| default: |
| rnd = FP_RN; |
| fpsetround (rnd); |
| } |
| |
| /* Turn on all available exceptions apart from 'inexact'. |
| Denormalized operand exception not available on all platforms. */ |
| |
| mode = FP_X_INV | FP_X_DZ | FP_X_OFL | FP_X_UFL; |
| #ifdef FP_X_DNML |
| mode = mode | FP_X_DNML; |
| #endif |
| |
| if (exception_mask & GSL_IEEE_MASK_INVALID) |
| mode &= ~ FP_X_INV; |
| |
| if (exception_mask & GSL_IEEE_MASK_DENORMALIZED) |
| { |
| #ifdef FP_X_DNML |
| mode &= ~ FP_X_DNML; |
| #endif |
| } |
| else |
| { |
| #ifndef FP_X_DNML |
| GSL_ERROR ("NetBSD does not support the denormalized operand exception on this platform. " |
| "Use 'mask-denormalized' to work around this.", |
| GSL_EUNSUP); |
| #endif |
| } |
| |
| if (exception_mask & GSL_IEEE_MASK_DIVISION_BY_ZERO) |
| mode &= ~ FP_X_DZ; |
| |
| if (exception_mask & GSL_IEEE_MASK_OVERFLOW) |
| mode &= ~ FP_X_OFL; |
| |
| if (exception_mask & GSL_IEEE_MASK_UNDERFLOW) |
| mode &= ~ FP_X_UFL; |
| |
| if (exception_mask & GSL_IEEE_TRAP_INEXACT) |
| { |
| mode |= FP_X_IMP; |
| } |
| else |
| { |
| mode &= ~ FP_X_IMP; |
| } |
| |
| fpsetmask (mode); |
| |
| return GSL_SUCCESS; |
| |
| } |
| |