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git-svn-id: http://svn2.nishi.boats/svn/milsko/trunk@543 b9cfdab3-6d41-4d17-bbe4-086880011989
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Nishi 2025-11-01 04:25:22 +00:00
commit 98143415ba
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src/math/nbsd_math.h Normal file
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/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/*
* from: @(#)fdlibm.h 5.1 93/09/24
* $NetBSD: math_private.h,v 1.34 2024/07/17 12:00:13 riastradh Exp $
*/
/* $Id$ */
#ifndef __NBSD_MATH__
#define __NBSD_MATH__
#include <Mw/BaseTypes.h>
typedef union _ieee_double_shape_type
{
double value;
struct
{
MwU32 lsw;
MwU32 msw;
} parts;
struct
{
MwU64 w;
} xparts;
} ieee_double_shape_type;
/* Get two 32-bit integers from a double. */
#define EXTRACT_WORDS(ix0,ix1,d) \
do { \
ieee_double_shape_type ew_u; \
ew_u.value = (d); \
(ix0) = ew_u.parts.msw; \
(ix1) = ew_u.parts.lsw; \
} while (0)
/* Get the more significant 32-bit integer from a double. */
#define GET_HIGH_WORD(i,d) \
do { \
ieee_double_shape_type gh_u; \
gh_u.value = (d); \
(i) = gh_u.parts.msw; \
} while (0)
/* Get the less significant 32-bit integer from a double. */
#define GET_LOW_WORD(i,d) \
do { \
ieee_double_shape_type gl_u; \
gl_u.value = (d); \
(i) = gl_u.parts.lsw; \
} while (0)
/* Set the more significant 32 bits of a double from an integer. */
#define SET_HIGH_WORD(d,v) \
do { \
ieee_double_shape_type sh_u; \
sh_u.value = (d); \
sh_u.parts.msw = (v); \
(d) = sh_u.value; \
} while (0)
/* Set the less significant 32 bits of a double from an integer. */
#define SET_LOW_WORD(d,v) \
do { \
ieee_double_shape_type sl_u; \
sl_u.value = (d); \
sl_u.parts.lsw = (v); \
(d) = sl_u.value; \
} while (0)
#endif