1 /* @(#)s_copysign.c 5.1 93/09/24 */ 2 /* 3 * ==================================================== 4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5 * 6 * Developed at SunPro, a Sun Microsystems, Inc. business. 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13 #include <sys/cdefs.h> 14 __FBSDID("$FreeBSD$"); 15 16 /* 17 * copysign(double x, double y) 18 * copysign(x,y) returns a value with the magnitude of x and 19 * with the sign bit of y. 20 */ 21 22 #include "math.h" 23 #include "math_private.h" 24 25 double 26 copysign(double x, double y) 27 { 28 u_int32_t hx,hy; 29 GET_HIGH_WORD(hx,x); 30 GET_HIGH_WORD(hy,y); 31 SET_HIGH_WORD(x,(hx&0x7fffffff)|(hy&0x80000000)); 32 return x; 33 } 34