| /* Copyright (C) 2004-2014 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 exceptions in the FPU status word. */ |
| enum |
| { |
| FE_INVALID = |
| #define FE_INVALID 1 |
| FE_INVALID, |
| FE_DIVBYZERO = |
| #define FE_DIVBYZERO 2 |
| FE_DIVBYZERO, |
| FE_OVERFLOW = |
| #define FE_OVERFLOW 4 |
| FE_OVERFLOW, |
| FE_UNDERFLOW = |
| #define FE_UNDERFLOW 8 |
| FE_UNDERFLOW, |
| FE_INEXACT = |
| #define FE_INEXACT 16 |
| FE_INEXACT, |
| }; |
| |
| /* Amount to shift by to convert an exception to a mask bit. */ |
| #define FE_EXCEPT_SHIFT 8 |
| |
| /* All supported exceptions. */ |
| #define FE_ALL_EXCEPT \ |
| (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT) |
| |
| /* VFP supports all of the four defined rounding modes. */ |
| enum |
| { |
| FE_TONEAREST = |
| #define FE_TONEAREST 0 |
| FE_TONEAREST, |
| FE_UPWARD = |
| #define FE_UPWARD 0x400000 |
| FE_UPWARD, |
| FE_DOWNWARD = |
| #define FE_DOWNWARD 0x800000 |
| FE_DOWNWARD, |
| FE_TOWARDZERO = |
| #define FE_TOWARDZERO 0xc00000 |
| FE_TOWARDZERO |
| }; |
| |
| /* Type representing exception flags. */ |
| typedef unsigned int fexcept_t; |
| |
| /* Type representing floating-point environment. */ |
| typedef struct |
| { |
| unsigned int __cw; |
| } |
| fenv_t; |
| |
| /* If the default argument is used we use this value. */ |
| #define FE_DFL_ENV ((const fenv_t *) -1l) |
| |
| #ifdef __USE_GNU |
| /* Floating-point environment where none of the exceptions are masked. */ |
| # define FE_NOMASK_ENV ((const fenv_t *) -2) |
| #endif |
