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fenv.h
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/*
* Copyright (c) 2015-2015 Texas Instruments Incorporated
*
* Copyright (c) 2004-2005 David Schultz <[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _FENV_H_
#define _FENV_H_
#include <_defs.h>
#include <linkage.h>
#ifndef __fenv_static
#define __fenv_static static __inline
#endif
typedef __uint32_t fenv_t;
typedef __uint32_t fexcept_t;
#if defined(__ARM_ARCH) || defined(__MSP430__) || defined(__TMS320C2000__)
/* exception flags */
#define FE_INVALID 0x0001
#define FE_DIVBYZERO 0x0004 /* warning: not the same as FreeBSD! */
#define FE_OVERFLOW 0x0008 /* warning: not the same as FreeBSD! */
#define FE_UNDERFLOW 0x0010 /* warning: not the same as FreeBSD! */
#define FE_INEXACT 0x0020 /* warning: not the same as FreeBSD! */
/* rounding modes */
#define FE_TONEAREST 0x0000
#define FE_TOWARDZERO 0x0003 /* warning: not the same as FreeBSD! */
#define FE_UPWARD 0x0002
#define FE_DOWNWARD 0x0001 /* warning: not the same as FreeBSD! */
#else
/* exception flags */
#define FE_INVALID 0x0001
#define FE_DIVBYZERO 0x0002
#define FE_OVERFLOW 0x0004
#define FE_UNDERFLOW 0x0008
#define FE_INEXACT 0x0010
/* rounding modes */
#define FE_TONEAREST 0x0000
#define FE_TOWARDZERO 0x0001
#define FE_UPWARD 0x0002
#define FE_DOWNWARD 0x0003
#endif
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
FE_UPWARD | FE_TOWARDZERO)
__BEGIN_DECLS
/* Default floating-point environment */
_DATA_ACCESS extern const fenv_t __fe_dfl_env;
#define FE_DFL_ENV (&__fe_dfl_env)
__fenv_static int feclearexcept(int __excepts);
__fenv_static int fegetexceptflag(fexcept_t *__flagp, int __excepts);
__fenv_static int fesetexceptflag(const fexcept_t *__flagp, int __excepts);
__fenv_static int feraiseexcept(int __excepts);
__fenv_static int fetestexcept(int __excepts);
__fenv_static int fegetround(void);
__fenv_static int fesetround(int __round);
__fenv_static int fegetenv(fenv_t *__envp);
__fenv_static int feholdexcept(fenv_t *__envp);
__fenv_static int fesetenv(const fenv_t *__envp);
__fenv_static int feupdateenv(const fenv_t *__envp);
__END_DECLS
/*
From the LSB:
5 flag bits, one per exception
5 mask bits, one per exception
2 bits for the rounding mode in range [0..3]
*/
#define __set_env(env, flags, mask, rnd) env = ((flags) \
| (mask)<< 5 \
| (rnd) << 10)
#define __env_flags(env) ((env) & FE_ALL_EXCEPT)
#define __env_mask(env) (((env) >> 5) & FE_ALL_EXCEPT)
#define __env_round(env) (((env) >> 10) & _ROUND_MASK)
#include "fenv-softfloat.h"
#endif /* !_FENV_H_ */