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/*-
* Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
* Copyright (c) 2002 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: src/lib/libc/include/fpmath.h,v 1.4 2008/12/23 22:20:59 marcel Exp $
*/
#ifndef _FPMATH_H_
#define _FPMATH_H_
// Currently assumes Intel platform
#if defined (__i386__) || defined(__x86_64__)
#ifdef __LP64__
#include "amd64_fpmath.h"
#else
#include "i386_fpmath.h"
#endif
#endif
#ifdef __linux
#include <features.h>
#include <endian.h>
#define _LITTLE_ENDIAN __LITTLE_ENDIAN
#define _BIG_ENDIAN __BIG_ENDIAN
#define _PDP_ENDIAN __PDP_ENDIAN
#define _BYTE_ORDER __BYTE_ORDER
#endif
#ifdef __APPLE__
#include <machine/endian.h>
#define _LITTLE_ENDIAN LITTLE_ENDIAN
#define _BIG_ENDIAN BIG_ENDIAN
#define _PDP_ENDIAN PDP_ENDIAN
#define _BYTE_ORDER BYTE_ORDER
#endif
#ifdef __FreeBSD__
#include <machine/endian.h>
#endif
#ifdef _WIN32
#define _LITTLE_ENDIAN 1234
#define _BIG_ENDIAN 4321
#define _PDP_ENDIAN 3412
#define _BYTE_ORDER _LITTLE_ENDIAN
#define _FLOAT_WORD_ORDER _LITTLE_ENDIAN
#define LITTLE_ENDIAN _LITTLE_ENDIAN
#define BIG_ENDIAN _BIG_ENDIAN
#define PDP_ENDIAN _PDP_ENDIAN
#define BYTE_ORDER _BYTE_ORDER
#endif
#ifndef _IEEE_WORD_ORDER
#define _IEEE_WORD_ORDER _BYTE_ORDER
#endif
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;
};
#define DBL_MANH_SIZE 20
#define DBL_MANL_SIZE 32
union IEEEd2bits {
double d;
struct {
#if _BYTE_ORDER == _LITTLE_ENDIAN
#if _IEEE_WORD_ORDER == _LITTLE_ENDIAN
unsigned int manl :32;
#endif
unsigned int manh :20;
unsigned int exp :11;
unsigned int sign :1;
#if _IEEE_WORD_ORDER == _BIG_ENDIAN
unsigned int manl :32;
#endif
#else /* _BIG_ENDIAN */
unsigned int sign :1;
unsigned int exp :11;
unsigned int manh :20;
unsigned int manl :32;
#endif
} bits;
};
#endif
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