sysdeps/libm-ieee754/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 #ifdef __STDC__
  31         long double __copysignl(long double x, long double y)
  32 #else
  33         long double __copysignl(x,y)
  34         long double x,y;
  35 #endif
  36 {
  37         u_int32_t es1,es2;
  38         GET_LDOUBLE_EXP(es1,x);
  39         GET_LDOUBLE_EXP(es2,y);
  40         SET_LDOUBLE_EXP(x,(es1&0x7fff)|(es2&0x8000));
  41         return x;
  42 }
  43 weak_alias (__copysignl, copysignl)