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/* Floating point environment.
Copyright (C) 2022-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#ifndef _FENV_H
#error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
#endif
/* Define bits representing the exception. We use the bit positions
of the appropriate bits in the FPU control word. */
enum
{
FE_INEXACT =
#define FE_INEXACT 0x010000
FE_INEXACT,
FE_UNDERFLOW =
#define FE_UNDERFLOW 0x020000
FE_UNDERFLOW,
FE_OVERFLOW =
#define FE_OVERFLOW 0x040000
FE_OVERFLOW,
FE_DIVBYZERO =
#define FE_DIVBYZERO 0x080000
FE_DIVBYZERO,
FE_INVALID =
#define FE_INVALID 0x100000
FE_INVALID,
};
#define FE_ALL_EXCEPT \
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
/* The LoongArch FPU supports all of the four defined rounding modes. We
use again the bit positions in the FPU control word as the values
for the appropriate macros. */
enum
{
FE_TONEAREST =
#define FE_TONEAREST 0x000
FE_TONEAREST,
FE_TOWARDZERO =
#define FE_TOWARDZERO 0x100
FE_TOWARDZERO,
FE_UPWARD =
#define FE_UPWARD 0x200
FE_UPWARD,
FE_DOWNWARD =
#define FE_DOWNWARD 0x300
FE_DOWNWARD
};
/* Type representing exception flags. */
typedef unsigned int fexcept_t;
/* Type representing floating-point environment. This function corresponds
to the layout of the block written by the `fstenv'. */
typedef struct
{
unsigned int __fp_control_register;
} fenv_t;
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((const fenv_t *) -1)
#ifdef __USE_GNU
/* Floating-point environment where none of the exception is masked. */
#define FE_NOMASK_ENV ((const fenv_t *) -257)
#endif
#if __GLIBC_USE (IEC_60559_BFP_EXT_C2X)
/* Type representing floating-point control modes. */
typedef unsigned int femode_t;
/* Default floating-point control modes. */
#define FE_DFL_MODE ((const femode_t *) -1L)
#endif
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