/* Copyright (C) 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 /* Define bits representing the exception. We use the bit positions of the appropriate bits in the FPU control word. */ enum { FE_INEXACT = 0x04, #define FE_INEXACT FE_INEXACT FE_UNDERFLOW = 0x08, #define FE_UNDERFLOW FE_UNDERFLOW FE_OVERFLOW = 0x10, #define FE_OVERFLOW FE_OVERFLOW FE_DIVBYZERO = 0x20, #define FE_DIVBYZERO FE_DIVBYZERO FE_INVALID = 0x40, #define FE_INVALID FE_INVALID }; #define FE_ALL_EXCEPT \ (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) /* The MIPS 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 = 0x0, #define FE_TONEAREST FE_TONEAREST FE_TOWARDZERO = 0x1, #define FE_TOWARDZERO FE_TOWARDZERO FE_UPWARD = 0x2, #define FE_UPWARD FE_UPWARD FE_DOWNWARD = 0x3 #define FE_DOWNWARD FE_DOWNWARD }; /* Type representing exception flags. */ typedef unsigned short int fexcept_t; /* Type representing floating-point environment. This function corresponds to the layout of the block written by the `fstenv'. */ typedef struct { unsigned int __fp_control_register; } 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