sysdeps/ieee754/ldbl-128/s_copysignl.c

   1 /* s_copysignl.c -- long double version of s_copysign.c.
   2  * Conversion to long double by Jakub Jelinek, jj@ultra.linux.cz.
   3  */
   4
   5 /*
   6  * ====================================================
   7  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   8  *
   9  * Developed at SunPro, a Sun Microsystems, Inc. business.
  10  * Permission to use, copy, modify, and distribute this
  11  * software is freely granted, provided that this notice
  12  * is preserved.
  13  * ====================================================
  14  */
  15
  16 #if defined(LIBM_SCCS) && !defined(lint)
  17 static char rcsid[] = "$NetBSD: $";
  18 #endif
  19
  20 /*
  21  * copysignl(long double x, long double y)
  22  * copysignl(x,y) returns a value with the magnitude of x and
  23  * with the sign bit of y.
  24  */
  25
  26 #include <math.h>
  27 #include <math_private.h>
  28
  29 long double __copysignl(long double x, long double y)
  30 {
  31         u_int64_t hx,hy;
  32         GET_LDOUBLE_MSW64(hx,x);
  33         GET_LDOUBLE_MSW64(hy,y);
  34         SET_LDOUBLE_MSW64(x,(hx&0x7fffffffffffffffULL)
  35                             |(hy&0x8000000000000000ULL));
  36         return x;
  37 }
  38 weak_alias (__copysignl, copysignl)