math/w_hypotl_compat.c

   1 /* w_hypotl.c -- long double version of w_hypot.c.
   2  */
   3
   4 /*
   5  * ====================================================
   6  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   7  *
   8  * Developed at SunPro, a Sun Microsystems, Inc. business.
   9  * Permission to use, copy, modify, and distribute this
  10  * software is freely granted, provided that this notice
  11  * is preserved.
  12  * ====================================================
  13  */
  14
  15 /*
  16  * wrapper hypotl(x,y)
  17  */
  18
  19 #include <math.h>
  20 #include <math_private.h>
  21 #include <math-svid-compat.h>
  22 #include <libm-alias-ldouble.h>
  23
  24
  25 #if LIBM_SVID_COMPAT
  26 long double
  27 __hypotl(long double x, long double y)
  28 {
  29         long double z;
  30         z = __ieee754_hypotl(x,y);
  31         if(__builtin_expect(!isfinite(z), 0)
  32            && isfinite(x) && isfinite(y) && _LIB_VERSION != _IEEE_)
  33             return __kernel_standard_l(x, y, 204); /* hypot overflow */
  34
  35         return z;
  36 }
  37 libm_alias_ldouble (__hypot, hypot)
  38 #endif