mirror of
https://git.planet-casio.com/Lephenixnoir/OpenLibm.git
synced 2024-12-28 04:23:41 +01:00
4dcc76ed96
fenv-softfloat.h file added SOFTFLOAT code parts are not tested.
278 lines
5.8 KiB
C
278 lines
5.8 KiB
C
/*-
|
|
* Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
|
|
* 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 <stdint.h>
|
|
#include "cdefs-compat.h"
|
|
|
|
#ifndef __fenv_static
|
|
#define __fenv_static static
|
|
#endif
|
|
|
|
typedef uint32_t fenv_t;
|
|
typedef uint32_t fexcept_t;
|
|
|
|
/* Exception flags */
|
|
#ifdef __mips_soft_float
|
|
#define _FPUSW_SHIFT 16
|
|
#define FE_INVALID 0x0001
|
|
#define FE_DIVBYZERO 0x0002
|
|
#define FE_OVERFLOW 0x0004
|
|
#define FE_UNDERFLOW 0x0008
|
|
#define FE_INEXACT 0x0010
|
|
#else
|
|
#define _FCSR_CAUSE_SHIFT 10
|
|
#define FE_INVALID 0x0040
|
|
#define FE_DIVBYZERO 0x0020
|
|
#define FE_OVERFLOW 0x0010
|
|
#define FE_UNDERFLOW 0x0008
|
|
#define FE_INEXACT 0x0004
|
|
#endif
|
|
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
|
|
FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
|
|
|
|
/* Rounding modes */
|
|
#define FE_TONEAREST 0x0000
|
|
#define FE_TOWARDZERO 0x0001
|
|
#define FE_UPWARD 0x0002
|
|
#define FE_DOWNWARD 0x0003
|
|
#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
|
|
FE_UPWARD | FE_TOWARDZERO)
|
|
__BEGIN_DECLS
|
|
|
|
/* Default floating-point environment */
|
|
extern const fenv_t __fe_dfl_env;
|
|
#define FE_DFL_ENV (&__fe_dfl_env)
|
|
|
|
/* We need to be able to map status flag positions to mask flag positions */
|
|
#define _ENABLE_SHIFT 5
|
|
#define _ENABLE_MASK (FE_ALL_EXCEPT << _ENABLE_SHIFT)
|
|
|
|
#ifndef __mips_soft_float
|
|
#define __cfc1(__fcsr) __asm __volatile("cfc1 %0, $31" : "=r" (__fcsr))
|
|
#define __ctc1(__fcsr) __asm __volatile("ctc1 %0, $31" :: "r" (__fcsr))
|
|
#endif
|
|
|
|
#ifdef __mips_soft_float
|
|
int feclearexcept(int __excepts);
|
|
int fegetexceptflag(fexcept_t *__flagp, int __excepts);
|
|
int fesetexceptflag(const fexcept_t *__flagp, int __excepts);
|
|
int feraiseexcept(int __excepts);
|
|
int fetestexcept(int __excepts);
|
|
int fegetround(void);
|
|
int fesetround(int __round);
|
|
int fegetenv(fenv_t *__envp);
|
|
int feholdexcept(fenv_t *__envp);
|
|
int fesetenv(const fenv_t *__envp);
|
|
int feupdateenv(const fenv_t *__envp);
|
|
#else
|
|
__fenv_static inline int
|
|
feclearexcept(int __excepts)
|
|
{
|
|
fexcept_t fcsr;
|
|
|
|
__excepts &= FE_ALL_EXCEPT;
|
|
__cfc1(fcsr);
|
|
fcsr &= ~(__excepts | (__excepts << _FCSR_CAUSE_SHIFT));
|
|
__ctc1(fcsr);
|
|
|
|
return (0);
|
|
}
|
|
|
|
__fenv_static inline int
|
|
fegetexceptflag(fexcept_t *__flagp, int __excepts)
|
|
{
|
|
fexcept_t fcsr;
|
|
|
|
__excepts &= FE_ALL_EXCEPT;
|
|
__cfc1(fcsr);
|
|
*__flagp = fcsr & __excepts;
|
|
|
|
return (0);
|
|
}
|
|
|
|
__fenv_static inline int
|
|
fesetexceptflag(const fexcept_t *__flagp, int __excepts)
|
|
{
|
|
fexcept_t fcsr;
|
|
|
|
__excepts &= FE_ALL_EXCEPT;
|
|
__cfc1(fcsr);
|
|
fcsr &= ~__excepts;
|
|
fcsr |= *__flagp & __excepts;
|
|
__ctc1(fcsr);
|
|
|
|
return (0);
|
|
}
|
|
|
|
__fenv_static inline int
|
|
feraiseexcept(int __excepts)
|
|
{
|
|
fexcept_t fcsr;
|
|
|
|
__excepts &= FE_ALL_EXCEPT;
|
|
__cfc1(fcsr);
|
|
fcsr |= __excepts | (__excepts << _FCSR_CAUSE_SHIFT);
|
|
__ctc1(fcsr);
|
|
|
|
return (0);
|
|
}
|
|
|
|
__fenv_static inline int
|
|
fetestexcept(int __excepts)
|
|
{
|
|
fexcept_t fcsr;
|
|
|
|
__excepts &= FE_ALL_EXCEPT;
|
|
__cfc1(fcsr);
|
|
|
|
return (fcsr & __excepts);
|
|
}
|
|
|
|
__fenv_static inline int
|
|
fegetround(void)
|
|
{
|
|
fexcept_t fcsr;
|
|
|
|
__cfc1(fcsr);
|
|
|
|
return (fcsr & _ROUND_MASK);
|
|
}
|
|
|
|
__fenv_static inline int
|
|
fesetround(int __round)
|
|
{
|
|
fexcept_t fcsr;
|
|
|
|
if (__round & ~_ROUND_MASK)
|
|
return (-1);
|
|
|
|
__cfc1(fcsr);
|
|
fcsr &= ~_ROUND_MASK;
|
|
fcsr |= __round;
|
|
__ctc1(fcsr);
|
|
|
|
return (0);
|
|
}
|
|
|
|
__fenv_static inline int
|
|
fegetenv(fenv_t *__envp)
|
|
{
|
|
|
|
__cfc1(*__envp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
__fenv_static inline int
|
|
feholdexcept(fenv_t *__envp)
|
|
{
|
|
fexcept_t fcsr;
|
|
|
|
__cfc1(fcsr);
|
|
*__envp = fcsr;
|
|
fcsr &= ~(FE_ALL_EXCEPT | _ENABLE_MASK);
|
|
__ctc1(fcsr);
|
|
|
|
return (0);
|
|
}
|
|
|
|
__fenv_static inline int
|
|
fesetenv(const fenv_t *__envp)
|
|
{
|
|
|
|
__ctc1(*__envp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
__fenv_static inline int
|
|
feupdateenv(const fenv_t *__envp)
|
|
{
|
|
fexcept_t fcsr;
|
|
|
|
__cfc1(fcsr);
|
|
fesetenv(__envp);
|
|
feraiseexcept(fcsr);
|
|
|
|
return (0);
|
|
}
|
|
#endif /* !__mips_soft_float */
|
|
|
|
#if __BSD_VISIBLE
|
|
|
|
/* We currently provide no external definitions of the functions below. */
|
|
|
|
#ifdef __mips_soft_float
|
|
int feenableexcept(int __mask);
|
|
int fedisableexcept(int __mask);
|
|
int fegetexcept(void);
|
|
#else
|
|
static inline int
|
|
feenableexcept(int __mask)
|
|
{
|
|
fenv_t __old_fcsr, __new_fcsr;
|
|
|
|
__cfc1(__old_fcsr);
|
|
__new_fcsr = __old_fcsr | (__mask & FE_ALL_EXCEPT) << _ENABLE_SHIFT;
|
|
__ctc1(__new_fcsr);
|
|
|
|
return ((__old_fcsr >> _ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
|
}
|
|
|
|
static inline int
|
|
fedisableexcept(int __mask)
|
|
{
|
|
fenv_t __old_fcsr, __new_fcsr;
|
|
|
|
__cfc1(__old_fcsr);
|
|
__new_fcsr = __old_fcsr & ~((__mask & FE_ALL_EXCEPT) << _ENABLE_SHIFT);
|
|
__ctc1(__new_fcsr);
|
|
|
|
return ((__old_fcsr >> _ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
|
}
|
|
|
|
static inline int
|
|
fegetexcept(void)
|
|
{
|
|
fexcept_t fcsr;
|
|
|
|
__cfc1(fcsr);
|
|
|
|
return ((fcsr & _ENABLE_MASK) >> _ENABLE_SHIFT);
|
|
}
|
|
|
|
#endif /* !__mips_soft_float */
|
|
|
|
#endif /* __BSD_VISIBLE */
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* !_FENV_H_ */
|