/* ieee-utils/fp-freebsd.c * * Copyright (C) 2000 Vladimir Kushnir * * 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 #include #include int gsl_ieee_set_mode (int precision, int rounding, int exception_mask) { fp_prec_t prec = 0 ; fp_except_t mode = 0 ; fp_rnd_t rnd = 0 ; switch (precision) { case GSL_IEEE_SINGLE_PRECISION: prec = FP_PS; fpsetprec(prec); break ; case GSL_IEEE_DOUBLE_PRECISION: prec = FP_PD; fpsetprec(prec); break ; case GSL_IEEE_EXTENDED_PRECISION: prec = FP_PE; fpsetprec(prec); 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 the exceptions apart from 'inexact' */ mode = FP_X_INV | FP_X_DNML | FP_X_DZ | FP_X_OFL | FP_X_UFL ; if (exception_mask & GSL_IEEE_MASK_INVALID) mode &= ~ FP_X_INV ; if (exception_mask & GSL_IEEE_MASK_DENORMALIZED) mode &= ~ FP_X_DNML ; 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 ; }