| /* @(#)s_copysign.c 5.1 93/09/24 */ |
| /* |
| * ==================================================== |
| * 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. |
| * ==================================================== |
| */ |
| |
| #include <sys/cdefs.h> |
| __FBSDID("$FreeBSD$"); |
| |
| /* |
| * 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; |
| } |
