123 lines
3.5 KiB
C
123 lines
3.5 KiB
C
/*-
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* Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
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* Copyright (c) 2002 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/libc/include/fpmath.h,v 1.4 2008/12/23 22:20:59 marcel Exp $
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*/
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#ifndef _FPMATH_H_
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#define _FPMATH_H_
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#if defined(__aarch64__)
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#include "aarch64_fpmath.h"
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#elif defined(__i386__) || defined(__x86_64__)
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#ifdef __LP64__
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#include "amd64_fpmath.h"
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#else
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#include "i386_fpmath.h"
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#endif
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#elif defined(__powerpc__)
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#include "powerpc_fpmath.h"
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#elif defined(__mips__)
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#include "mips_fpmath.h"
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#elif defined(__s390__)
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#include "s390_fpmath.h"
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#elif defined(__sh3__)
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#include "sh3eb_fpmath.h"
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#endif
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/* Definitions provided directly by GCC and Clang. */
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#if !(defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && defined(__ORDER_BIG_ENDIAN__))
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#if defined(__GLIBC__)
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#include <features.h>
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#include <endian.h>
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#define __ORDER_LITTLE_ENDIAN__ __LITTLE_ENDIAN
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#define __ORDER_BIG_ENDIAN__ __BIG_ENDIAN
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#define __BYTE_ORDER__ __BYTE_ORDER
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#elif defined(__APPLE__)
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#include <machine/endian.h>
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#define __ORDER_LITTLE_ENDIAN__ LITTLE_ENDIAN
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#define __ORDER_BIG_ENDIAN__ BIG_ENDIAN
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#define __BYTE_ORDER__ BYTE_ORDER
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#elif defined(_WIN32)
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#define __ORDER_LITTLE_ENDIAN__ 1234
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#define __ORDER_BIG_ENDIAN__ 4321
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#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
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#endif
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#endif /* __BYTE_ORDER__, __ORDER_LITTLE_ENDIAN__ and __ORDER_BIG_ENDIAN__ */
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#ifndef __FLOAT_WORD_ORDER__
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#define __FLOAT_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__ == __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__ == __ORDER_LITTLE_ENDIAN__
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#if __FLOAT_WORD_ORDER__ == __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 __FLOAT_WORD_ORDER__ == __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
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