/* Copyright (C) 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 /* Define bits representing the exception. We use the bit positions of the appropriate bits in the FPSR... (Tahoe EAS 2.4 5-4)*/ enum { FE_INEXACT = 1UL << 5, #define FE_INEXACT FE_INEXACT FE_UNDERFLOW = 1UL << 4, #define FE_UNDERFLOW FE_UNDERFLOW FE_OVERFLOW = 1UL << 3, #define FE_OVERFLOW FE_OVERFLOW FE_DIVBYZERO = 1UL << 2, #define FE_DIVBYZERO FE_DIVBYZERO FE_UNNORMAL = 1UL << 1, #define FE_UNNORMAL FE_UNNORMAL FE_INVALID = 1UL << 0, #define FE_INVALID FE_INVALID FE_ALL_EXCEPT = (FE_INEXACT | FE_UNDERFLOW | FE_OVERFLOW | FE_DIVBYZERO | FE_UNNORMAL | FE_INVALID) #define FE_ALL_EXCEPT FE_ALL_EXCEPT }; enum { FE_TOWARDZERO = 3, #define FE_TOWARDZERO FE_TOWARDZERO FE_UPWARD = 2, #define FE_UPWARD FE_UPWARD FE_DOWNWARD = 1, #define FE_DOWNWARD FE_DOWNWARD FE_TONEAREST = 0, #define FE_TONEAREST FE_TONEAREST }; /* 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 *) 0xc009804c0270033fUL) #ifdef __USE_GNU /* Floating-point environment where only FE_UNNORMAL is masked since this exception is not generally supported by glibc. */ # define FE_NOMASK_ENV ((const fenv_t *) 0xc009804c02700302UL) /* Floating-point environment with (processor-dependent) non-IEEE floating point. In this case, turning on flush-to-zero mode for s0, s2, and s3. */ # define FE_NONIEEE_ENV ((const fenv_t *) 0xc009a04d0270037fUL) #endif