1  /* @(#)w_hypot.c 5.1 93/09/24 */
       2  /*
       3   * ====================================================
       4   * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
       5   *
       6   * Developed at SunPro, a Sun Microsystems, Inc. business.
       7   * Permission to use, copy, modify, and distribute this
       8   * software is freely granted, provided that this notice
       9   * is preserved.
      10   * ====================================================
      11   */
      12  
      13  /*
      14   * wrapper hypot(x,y)
      15   */
      16  
      17  #include <math.h>
      18  #include <math_private.h>
      19  #include <math-svid-compat.h>
      20  #include <libm-alias-double.h>
      21  
      22  
      23  #if LIBM_SVID_COMPAT && SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_35)
      24  double
      25  __hypot_compat (double x, double y)
      26  {
      27  	double z = __ieee754_hypot(x,y);
      28  	if(__builtin_expect(!isfinite(z), 0)
      29  	   && isfinite(x) && isfinite(y) && _LIB_VERSION != _IEEE_)
      30  	    return __kernel_standard(x, y, 4); /* hypot overflow */
      31  
      32  	return z;
      33  }
      34  compat_symbol (libm, __hypot_compat, hypot, GLIBC_2_0);
      35  # ifdef NO_LONG_DOUBLE
      36  weak_alias (__hypot_compat, hypotl)
      37  # endif
      38  # ifdef LONG_DOUBLE_COMPAT
      39  LONG_DOUBLE_COMPAT_CHOOSE_libm_hypotl (
      40    compat_symbol (libm, __hypot_compat, hypotl, FIRST_VERSION_libm_hypotl), );
      41  # endif
      42  #endif