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