math/w_hypotl_compat.c

   1 /* w_hypotl.c -- long double version of w_hypot.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 /*
  18  * wrapper hypotl(x,y)
  19  */
  20
  21 #include <math.h>
  22 #include <math_private.h>
  23 #include <math-svid-compat.h>
  24
  25
  26 #if LIBM_SVID_COMPAT
  27 long double
  28 __hypotl(long double x, long double y)
  29 {
  30         long double z;
  31         z = __ieee754_hypotl(x,y);
  32         if(__builtin_expect(!isfinite(z), 0)
  33            && isfinite(x) && isfinite(y) && _LIB_VERSION != _IEEE_)
  34             return __kernel_standard_l(x, y, 204); /* hypot overflow */
  35
  36         return z;
  37 }
  38 weak_alias (__hypotl, hypotl)
  39 #endif