sysdeps/ieee754/ldbl-96/s_copysignl.c

   1 /* s_copysignl.c -- long double version of s_copysign.c.
   2  * Conversion to long double by Ulrich Drepper,
   3  * Cygnus Support, drepper@cygnus.com.
   4  */
   5
   6 /*
   7  * ====================================================
   8  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   9  *
  10  * Developed at SunPro, a Sun Microsystems, Inc. business.
  11  * Permission to use, copy, modify, and distribute this
  12  * software is freely granted, provided that this notice
  13  * is preserved.
  14  * ====================================================
  15  */
  16
  17 #if defined(LIBM_SCCS) && !defined(lint)
  18 static char rcsid[] = "$NetBSD: $";
  19 #endif
  20
  21 /*
  22  * copysignl(long double x, long double y)
  23  * copysignl(x,y) returns a value with the magnitude of x and
  24  * with the sign bit of y.
  25  */
  26
  27 #include <math.h>
  28 #include <math_private.h>
  29
  30 long double __copysignl(long double x, long double y)
  31 {
  32         u_int32_t es1,es2;
  33         GET_LDOUBLE_EXP(es1,x);
  34         GET_LDOUBLE_EXP(es2,y);
  35         SET_LDOUBLE_EXP(x,(es1&0x7fff)|(es2&0x8000));
  36         return x;
  37 }
  38 weak_alias (__copysignl, copysignl)