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Diffstat (limited to 'sysdeps/arm/bits/fenv.h')
-rw-r--r-- | sysdeps/arm/bits/fenv.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/sysdeps/arm/bits/fenv.h b/sysdeps/arm/bits/fenv.h new file mode 100644 index 0000000000..c7f5876c5c --- /dev/null +++ b/sysdeps/arm/bits/fenv.h @@ -0,0 +1,82 @@ +/* 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 |