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Definitions for FPU handling header.

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This commit is contained in:
Ulrich Drepper 1998-05-21 15:39:52 +00:00
parent c34d3ba41f
commit 3a5ade59c9
1 changed files with 58 additions and 0 deletions
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58
sysdeps/arm/fpu/bits/fenv.h Normal file
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/* 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 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
};
/* Amount to shift by to convert an exception to a mask bit. */
#define FE_EXCEPTION_SHIFT 16
/* All supported exceptions. */
#define FE_ALL_EXCEPT \
(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW)
/* The ARM FPU basically only supports round-to-nearest. Other rounding
modes exist, but you have to encode them in the actual instruction. */
#define FE_TONEAREST 0
/* Type representing exception flags. */
typedef unsigned long fexcept_t;
/* Type representing floating-point environment. */
typedef struct
{
unsigned long cw;
}
fenv_t;
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((fenv_t *) -1l)