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/* Copyright (C) 1997, 1998, 1999, 2000 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 = (1 << 9),
#define FE_INVALID FE_INVALID
FE_OVERFLOW = (1 << 8),
#define FE_OVERFLOW FE_OVERFLOW
FE_UNDERFLOW = (1 << 7),
#define FE_UNDERFLOW FE_UNDERFLOW
FE_DIVBYZERO = (1 << 6),
#define FE_DIVBYZERO FE_DIVBYZERO
FE_INEXACT = (1 << 5)
#define FE_INEXACT 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 = (0U << 30),
#define FE_TONEAREST FE_TONEAREST
FE_TOWARDZERO = (1U << 30),
#define FE_TOWARDZERO FE_TOWARDZERO
FE_UPWARD = (2U << 30),
#define FE_UPWARD FE_UPWARD
FE_DOWNWARD = (3U << 30)
#define FE_DOWNWARD 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__ ("stx %%fsr,%0" : "=m" (X))
# define __fenv_ldfsr(X) __asm__ __volatile__ ("ldx %0,%%fsr" : : "m" (X))
#else
# define __fenv_stfsr(X) __asm__ ("st %%fsr,%0" : "=m" (X))
# define __fenv_ldfsr(X) __asm__ __volatile__ ("ld %0,%%fsr" : : "m" (X))
#endif
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