ref: 53aac62a54ebbcc1781c0000d3e2384ed038c7bb
dir: /libmath/fdlibm/s_copysign.c/
/* derived from /netlib/fdlibm */ /* @(#)s_copysign.c 1.3 95/01/18 */ /* * ==================================================== * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. * * Developed at SunSoft, a Sun Microsystems, Inc. business. * Permission to use, copy, modify, and distribute this * software is freely granted, provided that this notice * is preserved. * ==================================================== */ /* * copysign(double x, double y) * copysign(x,y) returns a value with the magnitude of x and * with the sign bit of y. */ #include "fdlibm.h" double copysign(double x, double y) { __HI(x) = (__HI(x)&0x7fffffff)|(__HI(y)&0x80000000); return x; }