1  /* Copyright (C) 1998-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library.  If not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #ifndef _FENV_H
      19  # error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
      20  #endif
      21  
      22  
      23  #ifdef __mips_hard_float
      24  
      25  /* Define bits representing the exception.  We use the bit positions
      26     of the appropriate bits in the FPU control word.  */
      27  enum
      28    {
      29      FE_INEXACT =
      30  # define FE_INEXACT	0x04
      31        FE_INEXACT,
      32      FE_UNDERFLOW =
      33  # define FE_UNDERFLOW	0x08
      34        FE_UNDERFLOW,
      35      FE_OVERFLOW =
      36  # define FE_OVERFLOW	0x10
      37        FE_OVERFLOW,
      38      FE_DIVBYZERO =
      39  # define FE_DIVBYZERO	0x20
      40        FE_DIVBYZERO,
      41      FE_INVALID =
      42  # define FE_INVALID	0x40
      43        FE_INVALID,
      44    };
      45  
      46  # define FE_ALL_EXCEPT \
      47  	(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
      48  
      49  /* The MIPS FPU supports all of the four defined rounding modes.  We
      50     use again the bit positions in the FPU control word as the values
      51     for the appropriate macros.  */
      52  enum
      53    {
      54      FE_TONEAREST =
      55  # define FE_TONEAREST	0x0
      56        FE_TONEAREST,
      57      FE_TOWARDZERO =
      58  # define FE_TOWARDZERO	0x1
      59        FE_TOWARDZERO,
      60      FE_UPWARD =
      61  # define FE_UPWARD	0x2
      62        FE_UPWARD,
      63      FE_DOWNWARD =
      64  # define FE_DOWNWARD	0x3
      65        FE_DOWNWARD
      66    };
      67  
      68  #else
      69  
      70  /* In the soft-float case, only rounding to nearest is supported, with
      71     no exceptions.  */
      72  
      73  enum
      74    {
      75      __FE_UNDEFINED = -1,
      76  
      77      FE_TONEAREST =
      78  # define FE_TONEAREST	0x0
      79        FE_TONEAREST
      80    };
      81  
      82  # define FE_ALL_EXCEPT 0
      83  
      84  #endif
      85  
      86  
      87  /* Type representing exception flags.  */
      88  typedef unsigned short int fexcept_t;
      89  
      90  
      91  /* Type representing floating-point environment.  This function corresponds
      92     to the layout of the block written by the `fstenv'.  */
      93  typedef struct
      94    {
      95      unsigned int __fp_control_register;
      96    }
      97  fenv_t;
      98  
      99  /* If the default argument is used we use this value.  */
     100  #define FE_DFL_ENV	((const fenv_t *) -1)
     101  
     102  #if defined __USE_GNU && defined __mips_hard_float
     103  /* Floating-point environment where none of the exception is masked.  */
     104  # define FE_NOMASK_ENV  ((const fenv_t *) -2)
     105  #endif
     106  
     107  #if __GLIBC_USE (IEC_60559_BFP_EXT_C2X)
     108  /* Type representing floating-point control modes.  */
     109  typedef unsigned int femode_t;
     110  
     111  /* Default floating-point control modes.  */
     112  # define FE_DFL_MODE	((const femode_t *) -1L)
     113  #endif