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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/lib/libc/include/fpmath.h
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/*-

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2003 Mike Barcroft <[email protected]>

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 * Copyright (c) 2002 David Schultz <[email protected]>

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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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#ifndef _FPMATH_H_

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#define _FPMATH_H_

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#include <sys/endian.h>

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#include "_fpmath.h"

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#ifndef _IEEE_WORD_ORDER

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#define	_IEEE_WORD_ORDER	_BYTE_ORDER

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#endif

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union IEEEf2bits {

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	float	f;

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	struct {

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#if _BYTE_ORDER == _LITTLE_ENDIAN

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		unsigned int	man	:23;

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		unsigned int	exp	:8;

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		unsigned int	sign	:1;

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#else /* _BIG_ENDIAN */

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		unsigned int	sign	:1;

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		unsigned int	exp	:8;

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		unsigned int	man	:23;

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#endif

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	} bits;

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};

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#define	DBL_MANH_SIZE	20

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#define	DBL_MANL_SIZE	32

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union IEEEd2bits {

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	double	d;

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	struct {

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#if _BYTE_ORDER == _LITTLE_ENDIAN

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#if _IEEE_WORD_ORDER == _LITTLE_ENDIAN

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		unsigned int	manl	:32;

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#endif

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		unsigned int	manh	:20;

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		unsigned int	exp	:11;

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		unsigned int	sign	:1;

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#if _IEEE_WORD_ORDER == _BIG_ENDIAN

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		unsigned int	manl	:32;

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#endif

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#else /* _BIG_ENDIAN */

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		unsigned int	sign	:1;

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		unsigned int	exp	:11;

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		unsigned int	manh	:20;

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		unsigned int	manl	:32;

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#endif

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	} bits;

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};

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#endif /* !_FPMATH_H */

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