1  /* Fallback FPU-related code (for systems not otherwise supported).
       2     Copyright (C) 2005-2023 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  /* Fallback FPU-related code for systems not otherwise supported. This
      28     is mainly telling the user that we will not be able to do what he
      29     requested.  */
      30  
      31  void
      32  set_fpu (void)
      33  {
      34    if (options.fpe & GFC_FPE_INVALID)
      35      estr_write ("Fortran runtime warning: IEEE 'invalid operation' "
      36  	        "exception not supported.\n");
      37    if (options.fpe & GFC_FPE_DENORMAL)
      38      estr_write ("Fortran runtime warning: Floating point 'denormal operand' "
      39  	        "exception not supported.\n");
      40    if (options.fpe & GFC_FPE_ZERO)
      41      estr_write ("Fortran runtime warning: IEEE 'division by zero' "
      42  	        "exception not supported.\n");
      43    if (options.fpe & GFC_FPE_OVERFLOW)
      44      estr_write ("Fortran runtime warning: IEEE 'overflow' "
      45  	        "exception not supported.\n");
      46    if (options.fpe & GFC_FPE_UNDERFLOW)
      47      estr_write ("Fortran runtime warning: IEEE 'underflow' "
      48  	        "exception not supported.\n");
      49    if (options.fpe & GFC_FPE_INEXACT)
      50      estr_write ("Fortran runtime warning: IEEE 'inexact' "
      51  	        "exception not supported.\n");
      52  }
      53  
      54  void
      55  set_fpu_trap_exceptions (int trap __attribute__((unused)),
      56  			 int notrap __attribute__((unused)))
      57  {
      58  }
      59  
      60  int
      61  get_fpu_except_flags (void)
      62  {
      63    return 0;
      64  }
      65  
      66  
      67  int
      68  get_fpu_rounding_mode (void)
      69  {
      70    return 0;
      71  }
      72  
      73  
      74  int
      75  support_fpu_rounding_mode (int mode __attribute__((unused)))
      76  {
      77    return 0;
      78  }
      79  
      80  
      81  void
      82  set_fpu_rounding_mode (int round __attribute__((unused)))
      83  {
      84  }
      85  
      86  
      87  int
      88  support_fpu_underflow_control (int kind __attribute__((unused)))
      89  {
      90    return 0;
      91  }
      92  
      93  
      94  int
      95  get_fpu_underflow_mode (void)
      96  {
      97    return 0;
      98  }
      99  
     100  
     101  void
     102  set_fpu_underflow_mode (int gradual __attribute__((unused)))
     103  {
     104  }
     105