mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 21:10:07 +00:00
112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/* Floating point environment. C-SKY version.
|
|
Copyright (C) 2018-2023 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _FENV_H
|
|
# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
|
|
#endif
|
|
|
|
#ifdef __csky_hard_float__
|
|
/* Define bits representing the exception. We use the bit positions
|
|
of the appropriate bits in the FPU control word. */
|
|
enum
|
|
{
|
|
FE_INVALID =
|
|
#define FE_INVALID 0x01
|
|
FE_INVALID,
|
|
FE_DIVBYZERO =
|
|
#define FE_DIVBYZERO 0x02
|
|
FE_DIVBYZERO,
|
|
FE_OVERFLOW =
|
|
#define FE_OVERFLOW 0x04
|
|
FE_OVERFLOW,
|
|
FE_UNDERFLOW =
|
|
#define FE_UNDERFLOW 0x08
|
|
FE_UNDERFLOW,
|
|
FE_INEXACT =
|
|
#define FE_INEXACT 0x10
|
|
FE_INEXACT,
|
|
__FE_DENORMAL = 0x20
|
|
};
|
|
|
|
#define FE_ALL_EXCEPT \
|
|
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
|
|
|
|
/* The C-SKY 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 =
|
|
#define FE_TONEAREST (0x0 << 24)
|
|
FE_TONEAREST,
|
|
FE_TOWARDZERO =
|
|
#define FE_TOWARDZERO (0x1 << 24)
|
|
FE_TOWARDZERO,
|
|
FE_UPWARD =
|
|
#define FE_UPWARD (0x2 << 24)
|
|
FE_UPWARD,
|
|
FE_DOWNWARD =
|
|
#define FE_DOWNWARD (0x3 << 24)
|
|
FE_DOWNWARD,
|
|
__FE_ROUND_MASK = (0x3 << 24)
|
|
};
|
|
|
|
#else
|
|
|
|
/* In the soft-float case, only rounding to nearest is supported, with
|
|
no exceptions. */
|
|
|
|
enum
|
|
{
|
|
__FE_UNDEFINED = -1,
|
|
|
|
FE_TONEAREST =
|
|
# define FE_TONEAREST 0x0
|
|
FE_TONEAREST
|
|
};
|
|
|
|
# define FE_ALL_EXCEPT 0
|
|
|
|
#endif
|
|
|
|
/* Type representing exception flags. */
|
|
typedef unsigned int fexcept_t;
|
|
|
|
/* Type representing floating-point environment. */
|
|
typedef struct
|
|
{
|
|
unsigned int __fpcr;
|
|
unsigned int __fpsr;
|
|
} fenv_t;
|
|
|
|
/* If the default argument is used we use this value. */
|
|
#define FE_DFL_ENV ((const fenv_t *) -1)
|
|
|
|
#if defined __USE_GNU && defined __csky_hard_float__
|
|
/* Floating-point environment where none of the exceptions are masked. */
|
|
# define FE_NOMASK_ENV ((const fenv_t *) -2)
|
|
#endif
|
|
|
|
#if __GLIBC_USE (IEC_60559_BFP_EXT_C2X)
|
|
/* Type representing floating-point control modes. */
|
|
typedef unsigned int femode_t;
|
|
|
|
/* Default floating-point control modes. */
|
|
# define FE_DFL_MODE ((const femode_t *) -1L)
|
|
#endif
|