1  /* Euclidean distance function.  Float/Binary32 version.
       2     Copyright (C) 2012-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <errno.h>
      20  #include <libm-alias-finite.h>
      21  #include <libm-alias-float.h>
      22  #include <math-svid-compat.h>
      23  #include <math.h>
      24  #include <math-narrow-eval.h>
      25  #include <math_private.h>
      26  
      27  float
      28  __hypotf (float x, float y)
      29  {
      30    if (!isfinite (x) || !isfinite (y))
      31      {
      32        if ((isinf (x) || isinf (y))
      33  	  && !issignaling (x) && !issignaling (y))
      34  	return INFINITY;
      35        return x + y;
      36      }
      37  
      38    float r = math_narrow_eval ((float) sqrt ((double) x * (double) x
      39  					    + (double) y * (double) y));
      40    if (!isfinite (r))
      41      __set_errno (ERANGE);
      42    return r;
      43  }
      44  strong_alias (__hypotf, __ieee754_hypotf)
      45  #if LIBM_SVID_COMPAT
      46  versioned_symbol (libm, __hypotf, hypotf, GLIBC_2_35);
      47  libm_alias_float_other (__hypot, hypot)
      48  #else
      49  libm_alias_float (__hypot, hypot)
      50  #endif
      51  libm_alias_finite (__ieee754_hypotf, __hypotf)