source: soft/giet_vm/giet_libs/math/s_copysign.c @ 747

/*
 * ====================================================
 * 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.
 * ====================================================
 */

/* Modified for GIET-VM static OS at UPMC, France 2015.
 */

/*
 * 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.h"
#include "math_private.h"

double copysign(double x, double y)
{
        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;
}