s_copysign.c
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/* @(#)s_copysign.c 5.1 93/09/24 */
/*
* ====================================================
* 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.
* ====================================================
*/
#if defined(LIBM_SCCS) && !defined(lint)
static const char rcsid[] =
"$NetBSD: s_copysign.c,v 1.8 1995/05/10 20:46:57 jtc Exp $";
#endif
/*
* copysign(double x, double y)
* copysign(x,y) returns a value with the magnitude of x and
* with the sign bit of y.
*/
#include "math_libm.h"
#include "math_private.h"
libm_hidden_proto(copysign)
#ifdef __STDC__
double copysign(double x, double y)
#else
double copysign(x, y)
double x, y;
#endif
{
u_int32_t hx, hy;
GET_HIGH_WORD(hx, x);
GET_HIGH_WORD(hy, y);
SET_HIGH_WORD(x, (hx & 0x7fffffff) | (hy & 0x80000000));
return x;
}
libm_hidden_def(copysign)
GET_HIGH_WORD
#define GET_HIGH_WORD(i, d)
Definition: math_private.h:103
x
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1567
SET_HIGH_WORD
#define SET_HIGH_WORD(d, v)
Definition: math_private.h:131
u_int32_t
unsigned int u_int32_t
Definition: math_private.h:29
libm_hidden_def
#define libm_hidden_def(x)
Definition: math_private.h:26
y
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1567
libm_hidden_proto
libm_hidden_proto(copysign)
Definition: s_copysign.c:27
math_libm.h
math_private.h
copysign
#define copysign
Definition: math_private.h:34