libgfortran/config/fpu-aix.h

   1 /* AIX FPU-related code.
   2    Copyright 2005, 2007 Free Software Foundation, Inc.
   3    Contributed by Francois-Xavier Coudert <coudert@clipper.ens.fr>
   4
   5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   6
   7 Libgfortran is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU General Public
   9 License as published by the Free Software Foundation; either
  10 version 2 of the License, or (at your option) any later version.
  11
  12 In addition to the permissions in the GNU General Public License, the
  13 Free Software Foundation gives you unlimited permission to link the
  14 compiled version of this file into combinations with other programs,
  15 and to distribute those combinations without any restriction coming
  16 from the use of this file.  (The General Public License restrictions
  17 do apply in other respects; for example, they cover modification of
  18 the file, and distribution when not linked into a combine
  19 executable.)
  20
  21 Libgfortran is distributed in the hope that it will be useful,
  22 but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 GNU General Public License for more details.
  25
  26 You should have received a copy of the GNU General Public
  27 License along with libgfortran; see the file COPYING.  If not,
  28 write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  29 Boston, MA 02110-1301, USA.  */
  30
  31
  32 /* FPU-related code for AIX.  */
  33 #ifdef HAVE_FPTRAP_H
  34 #include <fptrap.h>
  35 #endif
  36
  37 void
  38 set_fpu (void)
  39 {
  40   fptrap_t mode = 0;
  41
  42   if (options.fpe & GFC_FPE_INVALID)
  43 #ifdef TRP_INVALID
  44     mode |= TRP_INVALID;
  45 #else
  46     st_printf ("Fortran runtime warning: IEEE 'invalid operation' "
  47                "exception not supported.\n");
  48 #endif
  49
  50   if (options.fpe & GFC_FPE_DENORMAL)
  51     st_printf ("Fortran runtime warning: IEEE 'denormal number' "
  52                "exception not supported.\n");
  53
  54   if (options.fpe & GFC_FPE_ZERO)
  55 #ifdef TRP_DIV_BY_ZERO
  56     mode |= TRP_DIV_BY_ZERO;
  57 #else
  58     st_printf ("Fortran runtime warning: IEEE 'division by zero' "
  59                "exception not supported.\n");
  60 #endif
  61
  62   if (options.fpe & GFC_FPE_OVERFLOW)
  63 #ifdef TRP_OVERFLOW
  64     mode |= TRP_OVERFLOW;
  65 #else
  66     st_printf ("Fortran runtime warning: IEEE 'overflow' "
  67                "exception not supported.\n");
  68 #endif
  69
  70   if (options.fpe & GFC_FPE_UNDERFLOW)
  71 #ifdef TRP_UNDERFLOW
  72     mode |= TRP_UNDERFLOW;
  73 #else
  74     st_printf ("Fortran runtime warning: IEEE 'underflow' "
  75                "exception not supported.\n");
  76 #endif
  77
  78   if (options.fpe & GFC_FPE_PRECISION)
  79 #ifdef TRP_UNDERFLOW
  80     mode |= TRP_UNDERFLOW;
  81 #else
  82     st_printf ("Fortran runtime warning: IEEE 'loss of precision' "
  83                "exception not supported.\n");
  84 #endif
  85
  86   fp_trap(FP_TRAP_SYNC);
  87   fp_enable(mode);
  88 }