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author | Ulrich Drepper <drepper@redhat.com> | 1998-03-18 14:29:48 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 1998-03-18 14:29:48 +0000 |
commit | ed6b842088c82567062d10f3b93ae3fb291dd787 (patch) | |
tree | b278ddec2bf9c24746ef680dd6040a9517ed0860 /sysdeps/arm | |
parent | fe0955cdc4dbc6ff51876fb9dc438c5a79d62c42 (diff) | |
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Floating point exception definitions.
Diffstat (limited to 'sysdeps/arm')
-rw-r--r-- | sysdeps/arm/bits/fenv.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/sysdeps/arm/bits/fenv.h b/sysdeps/arm/bits/fenv.h new file mode 100644 index 0000000000..3e4cdd3f3b --- /dev/null +++ b/sysdeps/arm/bits/fenv.h @@ -0,0 +1,90 @@ +/* Copyright (C) 1997, 1998 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. 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 FPU control word. */ +enum + { + FE_INVALID = 0x01, +#define FE_INVALID FE_INVALID + __FE_DENORM = 0x02, + FE_DIVBYZERO = 0x04, +#define FE_DIVBYZERO FE_DIVBYZERO + FE_OVERFLOW = 0x08, +#define FE_OVERFLOW FE_OVERFLOW + FE_UNDERFLOW = 0x10, +#define FE_UNDERFLOW FE_UNDERFLOW + FE_INEXACT = 0x20 +#define FE_INEXACT FE_INEXACT + }; + +#define FE_ALL_EXCEPT \ + (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) + +/* The ARM FPU supports all of the four defined rounding modes. We + use again the bit positions in the FPU control word as the values + for the appropriate macros. */ +enum + { + FE_TONEAREST = 0, +#define FE_TONEAREST FE_TONEAREST + FE_DOWNWARD = 0x400, +#define FE_DOWNWARD FE_DOWNWARD + FE_UPWARD = 0x800, +#define FE_UPWARD FE_UPWARD + FE_TOWARDSZERO = 0xc00 +#define FE_TOWARDSZERO FE_TOWARDSZERO + }; + + +/* Type representing exception flags. */ +typedef unsigned short int fexcept_t; + + +/* Type representing floating-point environment. This function corresponds + to the layout of the block written by the `fstenv'. */ +typedef struct + { + unsigned short int control_word; + unsigned short int __unused1; + unsigned short int status_word; + unsigned short int __unused2; + unsigned short int tags; + unsigned short int __unused3; + unsigned int eip; + unsigned short int cs_selector; + unsigned int opcode:11; + unsigned int __unused4:5; + unsigned int data_offset; + unsigned short int data_selector; + unsigned short int __unused5; + } +fenv_t; + +/* If the default argument is used we use this value. */ +#define FE_DFL_ENV ((fenv_t *) -1) + +#ifdef __USE_GNU +/* Floating-point environment where none of the exception is masked. */ +# define FE_NOMASK_ENV ((fenv_t *) -2) +#endif |