libgfortran/config/fpu-aix.h

   1 /* AIX FPU-related code.
   2    Copyright 2005 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 #ifdef HAVE_FLOAT_H
  38 #include <float.h>
  39 #endif
  40
  41 void
  42 set_fpu (void)
  43 {
  44   fptrap_t mode = 0;
  45
  46   if (options.fpe & GFC_FPE_INVALID)
  47 #ifdef TRP_INVALID
  48     mode |= TRP_INVALID;
  49 #else
  50     st_printf ("Fortran runtime warning: IEEE 'invalid operation' "
  51                "exception not supported.\n");
  52 #endif
  53
  54   if (options.fpe & GFC_FPE_DENORMAL)
  55     st_printf ("Fortran runtime warning: IEEE 'denormal number' "
  56                "exception not supported.\n");
  57
  58   if (options.fpe & GFC_FPE_ZERO)
  59 #ifdef TRP_DIV_BY_ZERO
  60     mode |= TRP_DIV_BY_ZERO;
  61 #else
  62     st_printf ("Fortran runtime warning: IEEE 'division by zero' "
  63                "exception not supported.\n");
  64 #endif
  65
  66   if (options.fpe & GFC_FPE_OVERFLOW)
  67 #ifdef TRP_OVERFLOW
  68     mode |= TRP_OVERFLOW;
  69 #else
  70     st_printf ("Fortran runtime warning: IEEE 'overflow' "
  71                "exception not supported.\n");
  72 #endif
  73
  74   if (options.fpe & GFC_FPE_UNDERFLOW)
  75 #ifdef TRP_UNDERFLOW
  76     mode |= TRP_UNDERFLOW;
  77 #else
  78     st_printf ("Fortran runtime warning: IEEE 'underflow' "
  79                "exception not supported.\n");
  80 #endif
  81
  82   if (options.fpe & GFC_FPE_PRECISION)
  83 #ifdef TRP_UNDERFLOW
  84     mode |= TRP_UNDERFLOW;
  85 #else
  86     st_printf ("Fortran runtime warning: IEEE 'loss of precision' "
  87                "exception not supported.\n");
  88 #endif
  89
  90   fp_trap(FP_TRAP_SYNC);
  91   fp_enable(mode);
  92 }