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/* Copyright (C) 1997-2013 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
#include <bits/wordsize.h>
/* Define bits representing the exception. We use the bit positions
of the appropriate accrued exception bits from the FSR. */
enum
{
FE_INVALID =
#define FE_INVALID (1 << 9)
FE_INVALID,
FE_OVERFLOW =
#define FE_OVERFLOW (1 << 8)
FE_OVERFLOW,
FE_UNDERFLOW =
#define FE_UNDERFLOW (1 << 7)
FE_UNDERFLOW,
FE_DIVBYZERO =
#define FE_DIVBYZERO (1 << 6)
FE_DIVBYZERO,
FE_INEXACT =
#define FE_INEXACT (1 << 5)
FE_INEXACT
};
#define FE_ALL_EXCEPT \
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
/* The Sparc 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 (0 << 30)
FE_TONEAREST,
FE_TOWARDZERO =
#define FE_TOWARDZERO (1 << 30)
FE_TOWARDZERO,
FE_UPWARD =
#define FE_UPWARD (-0x7fffffff - 1) /* (2 << 30) */
FE_UPWARD,
FE_DOWNWARD =
#define FE_DOWNWARD (-0x40000000) /* (3 << 30) */
FE_DOWNWARD
};
#define __FE_ROUND_MASK (3U << 30)
/* Type representing exception flags. */
typedef unsigned long int fexcept_t;
/* Type representing floating-point environment. */
typedef unsigned long int 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 *) -2)
#endif
/* For internal use only: access the fp state register. */
#if __WORDSIZE == 64
# define __fenv_stfsr(X) __asm__ __volatile__ ("stx %%fsr,%0" : "=m" (X))
# define __fenv_ldfsr(X) __asm__ __volatile__ ("ldx %0,%%fsr" : : "m" (X))
#else
# define __fenv_stfsr(X) __asm__ __volatile__ ("st %%fsr,%0" : "=m" (X))
# define __fenv_ldfsr(X) __asm__ __volatile__ ("ld %0,%%fsr" : : "m" (X))
#endif
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