diff options
Diffstat (limited to 'gsl-1.9/ieee-utils/fp-sunos4.c')
-rw-r--r-- | gsl-1.9/ieee-utils/fp-sunos4.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/gsl-1.9/ieee-utils/fp-sunos4.c b/gsl-1.9/ieee-utils/fp-sunos4.c new file mode 100644 index 0000000..307b538 --- /dev/null +++ b/gsl-1.9/ieee-utils/fp-sunos4.c @@ -0,0 +1,122 @@ +/* ieee-utils/fp-sunos4.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 <sys/ieeefp.h> +#include <floatingpoint.h> +#include <signal.h> +#include <gsl/gsl_ieee_utils.h> +#include <gsl/gsl_errno.h> + +int +gsl_ieee_set_mode (int precision, int rounding, int exception_mask) +{ + char * out ; + + switch (precision) + { + case GSL_IEEE_SINGLE_PRECISION: + ieee_flags ("set", "precision", "single", out) ; + break ; + case GSL_IEEE_DOUBLE_PRECISION: + ieee_flags ("set", "precision", "double", out) ; + break ; + case GSL_IEEE_EXTENDED_PRECISION: + ieee_flags ("set", "precision", "extended", out) ; + break ; + default: + ieee_flags ("set", "precision", "extended", out) ; + } + + switch (rounding) + { + case GSL_IEEE_ROUND_TO_NEAREST: + ieee_flags ("set", "direction", "nearest", out) ; + break ; + case GSL_IEEE_ROUND_DOWN: + ieee_flags ("set", "direction", "negative", out) ; + break ; + case GSL_IEEE_ROUND_UP: + ieee_flags ("set", "direction", "positive", out) ; + break ; + case GSL_IEEE_ROUND_TO_ZERO: + ieee_flags ("set", "direction", "tozero", out) ; + break ; + default: + ieee_flags ("set", "direction", "nearest", out) ; + } + + if (exception_mask & GSL_IEEE_MASK_INVALID) + { + ieee_handler ("set", "invalid", SIGFPE_IGNORE) ; + } + else + { + ieee_handler ("set", "invalid", SIGFPE_ABORT) ; + } + + if (exception_mask & GSL_IEEE_MASK_DENORMALIZED) + { + ieee_handler ("set", "denormalized", SIGFPE_IGNORE) ; + } + else + { + GSL_ERROR ("sunos4 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) + { + ieee_handler ("set", "division", SIGFPE_IGNORE) ; + } + else + { + ieee_handler ("set", "division", SIGFPE_ABORT) ; + } + + if (exception_mask & GSL_IEEE_MASK_OVERFLOW) + { + ieee_handler ("set", "overflow", SIGFPE_IGNORE) ; + } + else + { + ieee_handler ("set", "overflow", SIGFPE_ABORT) ; + } + + if (exception_mask & GSL_IEEE_MASK_UNDERFLOW) + { + ieee_handler ("set", "underflow", SIGFPE_IGNORE) ; + } + else + { + ieee_handler ("set", "underflow", SIGFPE_ABORT) ; + } + + if (exception_mask & GSL_IEEE_TRAP_INEXACT) + { + ieee_handler ("set", "inexact", SIGFPE_ABORT) ; + } + else + { + ieee_handler ("set", "inexact", SIGFPE_IGNORE) ; + } + + return GSL_SUCCESS ; +} |