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/* Copyright (C) 1997-2015 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
<http://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 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
};
/* Type representing exception flags. */
typedef unsigned int fexcept_t;
/* 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;
/* 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 exceptions are masked. */
# define FE_NOMASK_ENV ((const fenv_t *) -2)
#endif
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