1  /* Floating point environment, RISC-V version.
       2     Copyright (C) 1998-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library.  If not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #ifndef _FENV_H
      20  # error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
      21  #endif
      22  
      23  enum
      24    {
      25      FE_INEXACT   =
      26  #define FE_INEXACT	(0x01)
      27        FE_INEXACT,
      28      FE_UNDERFLOW =
      29  #define FE_UNDERFLOW	(0x02)
      30        FE_UNDERFLOW,
      31      FE_OVERFLOW  =
      32  #define FE_OVERFLOW	(0x04)
      33        FE_OVERFLOW,
      34      FE_DIVBYZERO =
      35  #define FE_DIVBYZERO	(0x08)
      36        FE_DIVBYZERO,
      37      FE_INVALID   =
      38  #define FE_INVALID	(0x10)
      39        FE_INVALID
      40    };
      41  
      42  #define FE_ALL_EXCEPT \
      43  	(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
      44  
      45  enum
      46    {
      47      FE_TONEAREST  =
      48  #define FE_TONEAREST	(0x0)
      49        FE_TONEAREST,
      50      FE_TOWARDZERO =
      51  #define FE_TOWARDZERO	(0x1)
      52        FE_TOWARDZERO,
      53      FE_DOWNWARD   =
      54  #define FE_DOWNWARD	(0x2)
      55        FE_DOWNWARD,
      56      FE_UPWARD     =
      57  #define FE_UPWARD	(0x3)
      58        FE_UPWARD
      59    };
      60  
      61  
      62  typedef unsigned int fexcept_t;
      63  typedef unsigned int fenv_t;
      64  
      65  /* If the default argument is used we use this value.  */
      66  #define FE_DFL_ENV	((__const fenv_t *) -1)
      67  
      68  #if __GLIBC_USE (IEC_60559_BFP_EXT_C2X)
      69  /* Type representing floating-point control modes.  */
      70  typedef unsigned int femode_t;
      71  
      72  /* Default floating-point control modes.  */
      73  # define FE_DFL_MODE	((const femode_t *) -1L)
      74  #endif