2f7d7c6538
Those are C funcitons Related CL: https://android-review.googlesource.com/#/c/41833/ Change-Id: I4386bcf948ad31c3690c9b7a145103088133d041
103 lines
3.3 KiB
C
103 lines
3.3 KiB
C
/*-
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* Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD: src/lib/msun/i387/fenv.h,v 1.4 2005/03/17 22:21:46 das Exp $
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*/
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#ifndef _FENV_H_
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#define _FENV_H_
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#include <sys/cdefs.h>
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#include <sys/_types.h>
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__BEGIN_DECLS
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/*
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* To preserve binary compatibility with FreeBSD 5.3, we pack the
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* mxcsr into some reserved fields, rather than changing sizeof(fenv_t).
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*/
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typedef struct {
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__uint16_t __control;
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__uint16_t __mxcsr_hi;
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__uint16_t __status;
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__uint16_t __mxcsr_lo;
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__uint32_t __tag;
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char __other[16];
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} fenv_t;
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typedef __uint16_t fexcept_t;
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/* Exception flags */
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#define FE_INVALID 0x01
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#define FE_DENORMAL 0x02
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#define FE_DIVBYZERO 0x04
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#define FE_OVERFLOW 0x08
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#define FE_UNDERFLOW 0x10
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#define FE_INEXACT 0x20
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#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_DENORMAL | FE_INEXACT | \
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FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
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/* Rounding modes */
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#define FE_TONEAREST 0x0000
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#define FE_DOWNWARD 0x0400
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#define FE_UPWARD 0x0800
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#define FE_TOWARDZERO 0x0c00
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#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
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FE_UPWARD | FE_TOWARDZERO)
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/* Default floating-point environment */
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extern const fenv_t __fe_dfl_env;
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#define FE_DFL_ENV (&__fe_dfl_env)
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/* C99 floating-point exception functions */
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int feclearexcept(int excepts);
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int fegetexceptflag(fexcept_t *flagp, int excepts);
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int fesetexceptflag(const fexcept_t *flagp, int excepts);
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/* feraiseexcept does not set the inexact flag on overflow/underflow */
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int feraiseexcept(int excepts);
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int fetestexcept(int excepts);
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/* C99 rounding control functions */
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int fegetround(void);
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int fesetround(int round);
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/* C99 floating-point environment functions */
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int fegetenv(fenv_t *__envp);
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int feholdexcept(fenv_t *__envp);
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int fesetenv(const fenv_t *envp);
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int feupdateenv(const fenv_t *__envp);
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#if __BSD_VISIBLE
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/* Additional support functions to set/query floating point traps */
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int feenableexcept(int __mask);
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int fedisableexcept(int __mask);
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int fegetexcept(void);
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#endif /* __BSD_VISIBLE */
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__END_DECLS
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#endif /* !_FENV_H_ */
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