xref: /freebsd-9.3-release/lib/libc/include/fpmath.h

/*-
 * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
 * Copyright (c) 2002 David Schultz <dschultz@uclink.Berkeley.EDU>
 * 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: head/lib/libc/include/fpmath.h 110566 2003-02-08 20:37:55Z mike $
 */

#include <sys/endian.h>
#include "_fpmath.h"

union IEEEf2bits {
	float	f;
	struct {
#if _BYTE_ORDER == _LITTLE_ENDIAN
		unsigned int	man	:23;
		unsigned int	exp	:8;
		unsigned int	sign	:1;
#else /* _BIG_ENDIAN */
		unsigned int	sign	:1;
		unsigned int	exp	:8;
		unsigned int	man	:23;
#endif
	} bits;
};

union IEEEd2bits {
	double	d;
	struct {
#if _BYTE_ORDER == _LITTLE_ENDIAN
		unsigned int	manl	:32;
		unsigned int	manh	:20;
		unsigned int	exp	:11;
		unsigned int	sign	:1;
#else /* _BIG_ENDIAN */
		unsigned int	sign	:1;
		unsigned int	exp	:11;
		unsigned int	manh	:20;
		unsigned int	manl	:32;
#endif
	} bits;
};