/* 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, 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 FPSR Accrued Exception Byte. */ enum { FE_INEXACT = 1 << 3, #define FE_INEXACT FE_INEXACT FE_DIVBYZERO = 1 << 4, #define FE_DIVBYZERO FE_DIVBYZERO FE_UNDERFLOW = 1 << 5, #define FE_UNDERFLOW FE_UNDERFLOW FE_OVERFLOW = 1 << 6, #define FE_OVERFLOW FE_OVERFLOW FE_INVALID = 1 << 7 #define FE_INVALID FE_INVALID }; #define FE_ALL_EXCEPT \ (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) /* The m68k FPU supports 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 << 4, #define FE_TOWARDZERO FE_TOWARDZERO FE_DOWNWARD = 2 << 4, #define FE_DOWNWARD FE_DOWNWARD FE_UPWARD = 3 << 4 #define FE_UPWARD FE_UPWARD }; /* Type representing exception flags. */ typedef unsigned int fexcept_t; /* Type representing floating-point environment. This structure corresponds to the layout of the block written by `fmovem'. */ typedef struct { unsigned int __control_register; unsigned int __status_register; unsigned int __instruction_address; } 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 exceptions are masked. */ # define FE_NOMASK_ENV ((__const fenv_t *) -2) #endif