| /* Copyright (C) 1997-2014 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 the exception. We use the bit positions of |
| the appropriate bits in the FPSR Accrued Exception Byte. */ |
| enum |
| { |
| FE_INEXACT = |
| #define FE_INEXACT (1 << 3) |
| FE_INEXACT, |
| FE_DIVBYZERO = |
| #define FE_DIVBYZERO (1 << 4) |
| FE_DIVBYZERO, |
| FE_UNDERFLOW = |
| #define FE_UNDERFLOW (1 << 5) |
| FE_UNDERFLOW, |
| FE_OVERFLOW = |
| #define FE_OVERFLOW (1 << 6) |
| FE_OVERFLOW, |
| FE_INVALID = |
| #define FE_INVALID (1 << 7) |
| 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 = |
| #define FE_TONEAREST 0 |
| FE_TONEAREST, |
| FE_TOWARDZERO = |
| #define FE_TOWARDZERO (1 << 4) |
| FE_TOWARDZERO, |
| FE_DOWNWARD = |
| #define FE_DOWNWARD (2 << 4) |
| FE_DOWNWARD, |
| FE_UPWARD = |
| #define FE_UPWARD (3 << 4) |
| 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 |
