NishiOwO
5981ab9f8f
git-svn-id: http://svn2.nishi.boats/svn/milsko/trunk@551 b9cfdab3-6d41-4d17-bbe4-086880011989
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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/*
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* from: @(#)fdlibm.h 5.1 93/09/24
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* $NetBSD: math_private.h,v 1.34 2024/07/17 12:00:13 riastradh Exp $
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*/
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/* $Id$ */
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#ifndef __NBSD_MATH__
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#define __NBSD_MATH__
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#include <Mw/BaseTypes.h>
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typedef union _ieee_double_shape_type {
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double value;
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struct
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{
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MwU32 lsw;
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MwU32 msw;
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} parts;
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struct
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{
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MwU64 w;
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} xparts;
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} ieee_double_shape_type;
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/* Get two 32-bit integers from a double. */
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#define EXTRACT_WORDS(ix0, ix1, d) \
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do { \
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ieee_double_shape_type ew_u; \
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ew_u.value = (d); \
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if(nbsd_endian() == 'L') { \
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(ix0) = ew_u.parts.msw; \
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(ix1) = ew_u.parts.lsw; \
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} else { \
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(ix0) = ew_u.parts.lsw; \
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(ix1) = ew_u.parts.msw; \
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} \
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} while(0)
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/* Get the more significant 32-bit integer from a double. */
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#define GET_HIGH_WORD(i, d) \
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do { \
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ieee_double_shape_type gh_u; \
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gh_u.value = (d); \
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(i) = nbsd_endian() == 'L' ? gh_u.parts.msw : gh_u.parts.lsw; \
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} while(0)
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/* Get the less significant 32-bit integer from a double. */
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#define GET_LOW_WORD(i, d) \
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do { \
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ieee_double_shape_type gl_u; \
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gl_u.value = (d); \
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(i) = nbsd_endian() == 'L' ? gl_u.parts.lsw : gl_u.parts.msw; \
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} while(0)
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/* Set the more significant 32 bits of a double from an integer. */
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#define SET_HIGH_WORD(d, v) \
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do { \
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ieee_double_shape_type sh_u; \
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sh_u.value = (d); \
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if(nbsd_endian() == 'L') { \
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sh_u.parts.msw = (v); \
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} else { \
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sh_u.parts.lsw = (v); \
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} \
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(d) = sh_u.value; \
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} while(0)
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/* Set the less significant 32 bits of a double from an integer. */
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#define SET_LOW_WORD(d, v) \
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do { \
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ieee_double_shape_type sl_u; \
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sl_u.value = (d); \
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if(nbsd_endian() == 'L') { \
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sl_u.parts.lsw = (v); \
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} else { \
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sl_u.parts.msw = (v); \
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} \
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(d) = sl_u.value; \
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} while(0)
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double nbsd_pow(double a, double b);
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char nbsd_endian(void);
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#endif
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