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- /* ieee-utils/fp-hpux11.c
- *
- * Copyright (C) 2001 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- #define _INCLUDE_HPUX_SOURCE
-
- #include <math.h>
- #include <stdio.h>
- #include <fenv.h>
- #include <gsl/gsl_ieee_utils.h>
- #include <gsl/gsl_errno.h>
-
- int
- gsl_ieee_set_mode (int precision, int rounding, int exception_mask)
- {
- int mode;
-
- switch (precision)
- {
- case GSL_IEEE_SINGLE_PRECISION:
- GSL_ERROR ("HPUX PA-RISC only supports default precision rounding",
- GSL_EUNSUP) ;
- break ;
- case GSL_IEEE_DOUBLE_PRECISION:
- GSL_ERROR ("HPUX PA-RISC only supports default precision rounding",
- GSL_EUNSUP) ;
- break ;
- case GSL_IEEE_EXTENDED_PRECISION:
- GSL_ERROR ("HPUX PA-RISC only supports default precision rounding",
- GSL_EUNSUP) ;
- break ;
- }
-
-
- switch (rounding)
- {
- case GSL_IEEE_ROUND_TO_NEAREST:
- fesetround (FE_TONEAREST) ;
- break ;
- case GSL_IEEE_ROUND_DOWN:
- fesetround (FE_DOWNWARD) ;
- break ;
- case GSL_IEEE_ROUND_UP:
- fesetround (FE_UPWARD) ;
- break ;
- case GSL_IEEE_ROUND_TO_ZERO:
- fesetround (FE_TOWARDZERO) ;
- break ;
- default:
- fesetround (FE_TONEAREST) ;
- }
-
- /* Turn on all the exceptions apart from 'inexact' */
-
- mode = FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW ;
-
- if (exception_mask & GSL_IEEE_MASK_INVALID)
- mode &= ~ FE_INVALID ;
-
- if (exception_mask & GSL_IEEE_MASK_DENORMALIZED)
- {
- /* do nothing */
- }
- else
- {
- GSL_ERROR ("HP-UX 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)
- mode &= ~ FE_DIVBYZERO ;
-
- if (exception_mask & GSL_IEEE_MASK_OVERFLOW)
- mode &= ~ FE_OVERFLOW ;
-
- if (exception_mask & GSL_IEEE_MASK_UNDERFLOW)
- mode &= ~ FE_UNDERFLOW ;
-
- if (exception_mask & GSL_IEEE_TRAP_INEXACT)
- {
- mode |= FE_INEXACT ;
- }
- else
- {
- mode &= ~ FE_INEXACT ;
- }
-
- fesettrapenable (mode) ;
-
- return GSL_SUCCESS ;
- }
-