| /* Copyright (C) 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... (Tahoe EAS 2.4 5-4)*/ |
| |
| enum |
| { |
| FE_INEXACT = 1UL << 5, |
| #define FE_INEXACT FE_INEXACT |
| |
| FE_UNDERFLOW = 1UL << 4, |
| #define FE_UNDERFLOW FE_UNDERFLOW |
| |
| FE_OVERFLOW = 1UL << 3, |
| #define FE_OVERFLOW FE_OVERFLOW |
| |
| FE_DIVBYZERO = 1UL << 2, |
| #define FE_DIVBYZERO FE_DIVBYZERO |
| |
| FE_UNNORMAL = 1UL << 1, |
| #define FE_UNNORMAL FE_UNNORMAL |
| |
| FE_INVALID = 1UL << 0, |
| #define FE_INVALID FE_INVALID |
| |
| FE_ALL_EXCEPT = |
| (FE_INEXACT | FE_UNDERFLOW | FE_OVERFLOW | FE_DIVBYZERO | FE_UNNORMAL | FE_INVALID) |
| #define FE_ALL_EXCEPT FE_ALL_EXCEPT |
| }; |
| |
| |
| enum |
| { |
| FE_TOWARDZERO = 3, |
| #define FE_TOWARDZERO FE_TOWARDZERO |
| |
| FE_UPWARD = 2, |
| #define FE_UPWARD FE_UPWARD |
| |
| FE_DOWNWARD = 1, |
| #define FE_DOWNWARD FE_DOWNWARD |
| |
| FE_TONEAREST = 0, |
| #define FE_TONEAREST FE_TONEAREST |
| }; |
| |
| |
| /* Type representing exception flags. */ |
| typedef unsigned long int fexcept_t; |
| |
| /* Type representing floating-point environment. */ |
| typedef unsigned long int fenv_t; |
| |
| /* If the default argument is used we use this value. */ |
| #define FE_DFL_ENV ((__const fenv_t *) 0xc009804c0270033fUL) |
| |
| #ifdef __USE_GNU |
| /* Floating-point environment where only FE_UNNORMAL is masked since this |
| exception is not generally supported by glibc. */ |
| # define FE_NOMASK_ENV ((__const fenv_t *) 0xc009804c02700302UL) |
| |
| /* Floating-point environment with (processor-dependent) non-IEEE |
| floating point. In this case, turning on flush-to-zero mode for |
| s0, s2, and s3. */ |
| # define FE_NONIEEE_ENV ((__const fenv_t *) 0xc009a04d0270037fUL) |
| #endif |