mirror of https://github.com/encounter/SDL.git
43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
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/* @(#)s_copysign.c 5.1 93/09/24 */
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/*
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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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#if defined(LIBM_SCCS) && !defined(lint)
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static const char rcsid[] =
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"$NetBSD: s_copysign.c,v 1.8 1995/05/10 20:46:57 jtc Exp $";
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#endif
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/*
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* copysign(double x, double y)
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* copysign(x,y) returns a value with the magnitude of x and
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* with the sign bit of y.
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*/
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#include "math_libm.h"
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#include "math_private.h"
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libm_hidden_proto(copysign)
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#ifdef __STDC__
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double copysign(double x, double y)
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#else
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double copysign(x, y)
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double x, y;
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#endif
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{
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u_int32_t hx, hy;
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GET_HIGH_WORD(hx, x);
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GET_HIGH_WORD(hy, y);
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SET_HIGH_WORD(x, (hx & 0x7fffffff) | (hy & 0x80000000));
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return x;
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}
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libm_hidden_def(copysign)
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