contrib/openbsd_libm/src/s_copysignl.c

   1 /*      $OpenBSD: s_copysignl.c,v 1.1 2008/12/09 20:00:35 martynas Exp $        */
   2 /*
   3  * Copyright (c) 2008 Martynas Venckus <martynas@openbsd.org>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include <sys/types.h>
  19 #include <machine/ieee.h>
  20 #include <math.h>
  21
  22 long double
  23 copysignl(long double x, long double y)
  24 {
  25         struct ieee_ext *px = (struct ieee_ext *)&x;
  26         struct ieee_ext *py = (struct ieee_ext *)&y;
  27
  28         px->ext_sign = py->ext_sign;
  29
  30         return x;
  31 }