| /* Copyright (C) 2004, 2005 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 General Public License |
| along with GCC; see the file COPYING. If not, write to the Free |
| Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301, USA. */ |
| |
| #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 = 1, |
| #define FE_INVALID FE_INVALID |
| FE_DIVBYZERO = 2, |
| #define FE_DIVBYZERO FE_DIVBYZERO |
| FE_OVERFLOW = 4, |
| #define FE_OVERFLOW FE_OVERFLOW |
| FE_UNDERFLOW = 8, |
| #define FE_UNDERFLOW FE_UNDERFLOW |
| FE_INEXACT = 16, |
| #define FE_INEXACT 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 = 0, |
| #define FE_TONEAREST FE_TONEAREST |
| FE_UPWARD = 0x400000, |
| #define FE_UPWARD FE_UPWARD |
| FE_DOWNWARD = 0x800000, |
| #define FE_DOWNWARD FE_DOWNWARD |
| FE_TOWARDZERO = 0xc00000 |
| #define FE_TOWARDZERO 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 ((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 |