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/* Copyright (C) 1997-2020 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
#if defined __HAVE_68881__ || defined __HAVE_FPU__ || defined __mcffpu__
/* Define bits representing the exception. We use the bit positions of
the appropriate bits in the FPSR Accrued Exception Byte. */
enum
{
FE_INEXACT =
# define FE_INEXACT (1 << 3)
FE_INEXACT,
FE_DIVBYZERO =
# define FE_DIVBYZERO (1 << 4)
FE_DIVBYZERO,
FE_UNDERFLOW =
# define FE_UNDERFLOW (1 << 5)
FE_UNDERFLOW,
FE_OVERFLOW =
# define FE_OVERFLOW (1 << 6)
FE_OVERFLOW,
FE_INVALID =
# define FE_INVALID (1 << 7)
FE_INVALID
};
# define FE_ALL_EXCEPT \
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
/* The m68k FPU supports all of the four defined rounding modes. We use
the bit positions in the FPCR Mode Control Byte as the values for the
appropriate macros. */
enum
{
FE_TONEAREST =
# define FE_TONEAREST 0
FE_TONEAREST,
FE_TOWARDZERO =
# define FE_TOWARDZERO (1 << 4)
FE_TOWARDZERO,
FE_DOWNWARD =
# define FE_DOWNWARD (2 << 4)
FE_DOWNWARD,
FE_UPWARD =
# define FE_UPWARD (3 << 4)
FE_UPWARD
};
#else
/* In the soft-float case, only rounding to nearest is supported, with
no exceptions. */
# define FE_ALL_EXCEPT 0
enum
{
__FE_UNDEFINED = -1,
FE_TONEAREST =
# define FE_TONEAREST 0
FE_TONEAREST
};
#endif
/* Type representing exception flags. */
typedef unsigned int fexcept_t;
#if defined __HAVE_68881__ || defined __HAVE_FPU__ || defined __mcffpu__
/* Type representing floating-point environment. This structure
corresponds to the layout of the block written by `fmovem'. */
typedef struct
{
unsigned int __control_register;
unsigned int __status_register;
unsigned int __instruction_address;
}
fenv_t;
#else
/* Keep ABI compatibility with the type used in the generic
bits/fenv.h, formerly used for no-FPU ColdFire. */
typedef struct
{
fexcept_t __excepts;
}
fenv_t;
#endif
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((const fenv_t *) -1)
#if defined __USE_GNU && (defined __HAVE_68881__ \
|| defined __HAVE_FPU__ \
|| defined __mcffpu__)
/* Floating-point environment where none of the exceptions are masked. */
# define FE_NOMASK_ENV ((const fenv_t *) -2)
#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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