libgfortran/config/fpu-aix.h

   1 /* AIX FPU-related code.
   2    Copyright 2005, 2007, 2009, 2011 Free Software Foundation, Inc.
   3    Contributed by Francois-Xavier Coudert <coudert@clipper.ens.fr>
   4
   5 This file is part of the GNU Fortran 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 3 of the License, or (at your option) any later version.
  11
  12 Libgfortran is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26
  27 /* FPU-related code for AIX.  */
  28 #ifdef HAVE_FPTRAP_H
  29 #include <fptrap.h>
  30 #endif
  31
  32 void
  33 set_fpu (void)
  34 {
  35   fptrap_t mode = 0;
  36
  37   if (options.fpe & GFC_FPE_INVALID)
  38 #ifdef TRP_INVALID
  39     mode |= TRP_INVALID;
  40 #else
  41     estr_write ("Fortran runtime warning: IEEE 'invalid operation' "
  42                 "exception not supported.\n");
  43 #endif
  44
  45   if (options.fpe & GFC_FPE_DENORMAL)
  46     estr_write ("Fortran runtime warning: Floating point 'denormal operand' "
  47                 "exception not supported.\n");
  48
  49   if (options.fpe & GFC_FPE_ZERO)
  50 #ifdef TRP_DIV_BY_ZERO
  51     mode |= TRP_DIV_BY_ZERO;
  52 #else
  53     estr_write ("Fortran runtime warning: IEEE 'division by zero' "
  54                 "exception not supported.\n");
  55 #endif
  56
  57   if (options.fpe & GFC_FPE_OVERFLOW)
  58 #ifdef TRP_OVERFLOW
  59     mode |= TRP_OVERFLOW;
  60 #else
  61     estr_write ("Fortran runtime warning: IEEE 'overflow' "
  62                 "exception not supported.\n");
  63 #endif
  64
  65   if (options.fpe & GFC_FPE_UNDERFLOW)
  66 #ifdef TRP_UNDERFLOW
  67     mode |= TRP_UNDERFLOW;
  68 #else
  69     estr_write ("Fortran runtime warning: IEEE 'underflow' "
  70                 "exception not supported.\n");
  71 #endif
  72
  73   if (options.fpe & GFC_FPE_INEXACT)
  74 #ifdef TRP_INEXACT
  75     mode |= TRP_INEXACT;
  76 #else
  77     estr_write ("Fortran runtime warning: IEEE 'inexact' "
  78                 "exception not supported.\n");
  79 #endif
  80
  81   fp_trap(FP_TRAP_SYNC);
  82   fp_enable(mode);
  83 }