1/* Copyright (C) 1998-2025 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.  */
 27enum
 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.  */
 52enum
 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
 73enum
 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.  */
 88typedef 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'.  */
 93typedef struct
 94  {
 95    unsigned int __fp_control_register;
 96  }
 97fenv_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_C23)
108/* Type representing floating-point control modes.  */
109typedef unsigned int femode_t;
110
111/* Default floating-point control modes.  */
112# define FE_DFL_MODE	((const femode_t *) -1L)
113#endif