1  /* Floating point environment.  ARC version.
       2     Copyright (C) 2020-2023 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_INVALID   =
      26  # define FE_INVALID	(0x01)
      27        FE_INVALID,
      28      FE_DIVBYZERO =
      29  # define FE_DIVBYZERO	(0x02)
      30        FE_DIVBYZERO,
      31      FE_OVERFLOW  =
      32  # define FE_OVERFLOW	(0x04)
      33        FE_OVERFLOW,
      34      FE_UNDERFLOW =
      35  # define FE_UNDERFLOW	(0x08)
      36        FE_UNDERFLOW,
      37      FE_INEXACT   =
      38  # define FE_INEXACT	(0x10)
      39        FE_INEXACT
      40    };
      41  
      42  # define FE_ALL_EXCEPT \
      43  	(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
      44  
      45  enum
      46    {
      47      FE_TOWARDZERO =
      48  # define FE_TOWARDZERO	(0x0)
      49        FE_TOWARDZERO,
      50      FE_TONEAREST  =
      51  # define FE_TONEAREST	(0x1)	/* default */
      52        FE_TONEAREST,
      53      FE_UPWARD     =
      54  # define FE_UPWARD	(0x2)
      55        FE_UPWARD,
      56      FE_DOWNWARD   =
      57  # define FE_DOWNWARD	(0x3)
      58        FE_DOWNWARD
      59    };
      60  
      61  typedef unsigned int fexcept_t;
      62  
      63  typedef struct
      64  {
      65    unsigned int __fpcr;
      66    unsigned int __fpsr;
      67  } fenv_t;
      68  
      69  /* If the default argument is used we use this value.  */
      70  #define FE_DFL_ENV	((const fenv_t *) -1)
      71  
      72  #if __GLIBC_USE (IEC_60559_BFP_EXT)
      73  /* Type representing floating-point control modes.  */
      74  typedef unsigned int femode_t;
      75  
      76  /* Default floating-point control modes.  */
      77  # define FE_DFL_MODE	((const femode_t *) -1L)
      78  #endif