mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
/* Copyright (C) 2004-2015 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 exceptions in the FPU status word. */
|
|
enum
|
|
{
|
|
FE_INVALID =
|
|
#define FE_INVALID 1
|
|
FE_INVALID,
|
|
FE_DIVBYZERO =
|
|
#define FE_DIVBYZERO 2
|
|
FE_DIVBYZERO,
|
|
FE_OVERFLOW =
|
|
#define FE_OVERFLOW 4
|
|
FE_OVERFLOW,
|
|
FE_UNDERFLOW =
|
|
#define FE_UNDERFLOW 8
|
|
FE_UNDERFLOW,
|
|
FE_INEXACT =
|
|
#define FE_INEXACT 16
|
|
FE_INEXACT,
|
|
};
|
|
|
|
/* Amount to shift by to convert an exception to a mask bit. */
|
|
#define FE_EXCEPT_SHIFT 8
|
|
|
|
/* All supported exceptions. */
|
|
#define FE_ALL_EXCEPT \
|
|
(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
|
|
|
|
/* VFP supports all of the four defined rounding modes. */
|
|
enum
|
|
{
|
|
FE_TONEAREST =
|
|
#define FE_TONEAREST 0
|
|
FE_TONEAREST,
|
|
FE_UPWARD =
|
|
#define FE_UPWARD 0x400000
|
|
FE_UPWARD,
|
|
FE_DOWNWARD =
|
|
#define FE_DOWNWARD 0x800000
|
|
FE_DOWNWARD,
|
|
FE_TOWARDZERO =
|
|
#define FE_TOWARDZERO 0xc00000
|
|
FE_TOWARDZERO
|
|
};
|
|
|
|
/* Type representing exception flags. */
|
|
typedef unsigned int fexcept_t;
|
|
|
|
/* Type representing floating-point environment. */
|
|
typedef struct
|
|
{
|
|
unsigned int __cw;
|
|
}
|
|
fenv_t;
|
|
|
|
/* If the default argument is used we use this value. */
|
|
#define FE_DFL_ENV ((const fenv_t *) -1l)
|
|
|
|
#ifdef __USE_GNU
|
|
/* Floating-point environment where none of the exceptions are masked. */
|
|
# define FE_NOMASK_ENV ((const fenv_t *) -2)
|
|
#endif
|