1  /* Floating point environment, OpenRISC version.
       2     Copyright (C) 2022-2023 Free Software Foundation, Inc.
       3  
       4     This file is part of the GNU C Library.
       5  
       6     The GNU C Library is free software; you can redistribute it and/or
       7     modify it under the terms of the GNU Lesser General Public License as
       8     published by the Free Software Foundation; either version 2.1 of the
       9     License, or (at your option) any later version.
      10  
      11     The GNU C Library is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14     Lesser General Public License for more details.
      15  
      16     You should have received a copy of the GNU Lesser General Public
      17     License along with the GNU C Library; if not, see
      18     <https://www.gnu.org/licenses/>.  */
      19  
      20  #ifndef _FENV_H
      21  # error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
      22  #endif
      23  
      24  /* Define bits representing exceptions in the FPCSR status word.  */
      25  enum
      26    {
      27      FE_OVERFLOW =
      28  #define FE_OVERFLOW	(1 << 3)
      29        FE_OVERFLOW,
      30      FE_UNDERFLOW =
      31  #define FE_UNDERFLOW	(1 << 4)
      32        FE_UNDERFLOW,
      33      FE_INEXACT =
      34  #define FE_INEXACT	(1 << 8)
      35        FE_INEXACT,
      36      FE_INVALID =
      37  #define FE_INVALID	(1 << 9)
      38        FE_INVALID,
      39      FE_DIVBYZERO =
      40  #define FE_DIVBYZERO	(1 << 11)
      41        FE_DIVBYZERO,
      42    };
      43  
      44  /* All supported exceptions.  */
      45  #define FE_ALL_EXCEPT	\
      46  	(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
      47  
      48  /* Define bits representing rounding modes in the FPCSR Rmode field.  */
      49  #define FE_TONEAREST  (0x0 << 1)
      50  #define FE_TOWARDZERO (0x1 << 1)
      51  #define FE_UPWARD     (0x2 << 1)
      52  #define FE_DOWNWARD   (0x3 << 1)
      53  
      54  /* Type representing exception flags.  */
      55  typedef unsigned int fexcept_t;
      56  
      57  /* Type representing floating-point environment.  */
      58  typedef unsigned int fenv_t;
      59  
      60  /* If the default argument is used we use this value.  */
      61  #define FE_DFL_ENV	((const fenv_t *) -1l)
      62  
      63  #if __GLIBC_USE (IEC_60559_BFP_EXT)
      64  /* Type representing floating-point control modes.  */
      65  typedef unsigned int femode_t;
      66  
      67  /* Default floating-point control modes.  */
      68  # define FE_DFL_MODE	((const femode_t *) -1L)
      69  #endif