libm/w_hypotl.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
  24 #if !defined __NO_LONG_DOUBLE_MATH
  25 long double
  26 hypotl(long double x, long double y)
  27 {
  28 # if defined(__UCLIBC_HAS_FENV__)
  29         long double z;
  30         z = (long double) __ieee754_hypot((double) x, (double) 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 # else
  37         return (long double) __ieee754_hypot((double) x, (double) y);
  38 # endif /* __UCLIBC_HAS_FENV__ */
  39 }
  40 #endif /* __NO_LONG_DOUBLE_MATH */