xref: /illumos-gate/usr/src/lib/libm/common/C/copysign.c (revision ddc0e0b5)
125c28e83SPiotr Jasiukajtis /*
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2125c28e83SPiotr Jasiukajtis 
2225c28e83SPiotr Jasiukajtis /*
2325c28e83SPiotr Jasiukajtis  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
2425c28e83SPiotr Jasiukajtis  */
2525c28e83SPiotr Jasiukajtis /*
2625c28e83SPiotr Jasiukajtis  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
2725c28e83SPiotr Jasiukajtis  * Use is subject to license terms.
2825c28e83SPiotr Jasiukajtis  */
2925c28e83SPiotr Jasiukajtis 
30*ddc0e0b5SRichard Lowe #pragma weak __copysign = copysign
3125c28e83SPiotr Jasiukajtis 
3225c28e83SPiotr Jasiukajtis #include "libm.h"
3325c28e83SPiotr Jasiukajtis 
3425c28e83SPiotr Jasiukajtis double
copysign(double x,double y)3525c28e83SPiotr Jasiukajtis copysign(double x, double y) {
3625c28e83SPiotr Jasiukajtis 	int hx, hy;
3725c28e83SPiotr Jasiukajtis 
3825c28e83SPiotr Jasiukajtis 	hx = ((int *) &x)[HIWORD];
3925c28e83SPiotr Jasiukajtis 	hy = ((int *) &y)[HIWORD];
4025c28e83SPiotr Jasiukajtis 	return (hx ^ hy) >= 0 ?  (x) : (-x);
4125c28e83SPiotr Jasiukajtis }
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