/* Copyright (C) 2002-2003, George Thanos <george.thanos@gdt.gr> Yannis Mitsos <yannis.mitsos@gdt.gr> Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #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 SR. */ enum { FE_INEXACT = (1 << 8), #define FE_INEXACT FE_INEXACT FE_UNDERFLOW = (1 << 9), #define FE_UNDERFLOW FE_UNDERFLOW FE_OVERFLOW = (1 << 10), #define FE_OVERFLOW FE_OVERFLOW FE_DIVBYZERO = (1 << 11), #define FE_DIVBYZERO FE_DIVBYZERO FE_INVALID = (1 << 12) #define FE_INVALID FE_INVALID }; #define FE_ALL_EXCEPT \ (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) /* We support all of the four defined rounding modes. We use the bit positions in the FPCR Mode Control Byte as the values for the appropriate macros. */ enum { FE_TONEAREST = 0, #define FE_TONEAREST FE_TONEAREST FE_TOWARDZERO = 1 << 13 , #define FE_TOWARDZERO FE_TOWARDZERO FE_DOWNWARD = 2 << 13, #define FE_DOWNWARD FE_DOWNWARD FE_UPWARD = 3 << 13 #define FE_UPWARD FE_UPWARD }; /* Type representing exception flags. */ typedef unsigned int fexcept_t; /* Type representing floating-point environment.*/ typedef struct { unsigned int round_mode; unsigned int trap_enabled; unsigned int accrued_except; unsigned int actual_except; } fenv_t; #if 0 /* If the default argument is used we use this value. */ const fenv FE_DFL_ENV_OBJ = {0, 0x1C00, 0} #define FE_DFL_ENV (&FE_DFL_ENV_OBJ) #ifdef __USE_GNU /* Floating-point environment where none of the exceptions are masked. */ const fenv_t FE_NOMASK_ENV_OBJ = { 0, 0x1F00, 0 }; # define FE_NOMASK_ENV (&FE_NOMASK_ENV_OBJ) #endif #endif #include <bits/fenvinline.h>