7082a2cf72
the function bodies require only 2 to 10 instructions. However, it leads to application binaries that refer to a private ABI, namely, the softfloat innards in libc. This could complicate future changes in the implementation of the floating-point emulation layer, so it seems best to have programs refer to the official fe* entry points in libm.
67 lines
2.7 KiB
C
67 lines
2.7 KiB
C
/*-
|
|
* Copyright (c) 2004 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#define __fenv_static
|
|
#include "fenv.h"
|
|
|
|
/*
|
|
* The following macros map between the softfloat emulator's flags and
|
|
* the hardware's FPSR. The hardware this file was written for doesn't
|
|
* have rounding control bits, so we stick those in the system ID byte.
|
|
*/
|
|
#define __set_env(env, flags, mask, rnd) env = ((flags) \
|
|
| (mask)<<_FPUSW_SHIFT \
|
|
| (rnd) << 24)
|
|
#define __env_flags(env) ((env) & FE_ALL_EXCEPT)
|
|
#define __env_mask(env) (((env) >> _FPUSW_SHIFT) \
|
|
& FE_ALL_EXCEPT)
|
|
#define __env_round(env) (((env) >> 24) & _ROUND_MASK)
|
|
#include "fenv-softfloat.h"
|
|
|
|
#ifdef __GNUC_GNU_INLINE__
|
|
#error "This file must be compiled with C99 'inline' semantics"
|
|
#endif
|
|
|
|
/*
|
|
* Hopefully the system ID byte is immutable, so it's valid to use
|
|
* this as a default environment.
|
|
*/
|
|
const fenv_t __fe_dfl_env = 0;
|
|
|
|
extern inline int feclearexcept(int __excepts);
|
|
extern inline int fegetexceptflag(fexcept_t *__flagp, int __excepts);
|
|
extern inline int fesetexceptflag(const fexcept_t *__flagp, int __excepts);
|
|
extern inline int feraiseexcept(int __excepts);
|
|
extern inline int fetestexcept(int __excepts);
|
|
extern inline int fegetround(void);
|
|
extern inline int fesetround(int __round);
|
|
extern inline int fegetenv(fenv_t *__envp);
|
|
extern inline int feholdexcept(fenv_t *__envp);
|
|
extern inline int fesetenv(const fenv_t *__envp);
|
|
extern inline int feupdateenv(const fenv_t *__envp);
|