| /* @(#)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. |
| * ==================================================== |
| */ |
| |
| #if defined(LIBM_SCCS) && !defined(lint) |
| static char rcsid[] = "$NetBSD: s_copysign.c,v 1.8 1995/05/10 20:46:57 jtc Exp $"; |
| #endif |
| |
| /* |
| * 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" |
| |
| #ifdef __STDC__ |
| double __copysign(double x, double y) |
| #else |
| double __copysign(x,y) |
| double x,y; |
| #endif |
| { |
| 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; |
| } |
| weak_alias (__copysign, copysign) |
| #ifdef NO_LONG_DOUBLE |
| strong_alias (__copysign, __copysignl) |
| weak_alias (__copysign, copysignl) |
| #endif |
