/* Wrapper to set errno for ilogb.

   Copyright (C) 2012-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <math.h>

#include <errno.h>

#include <limits.h>

#include <math_private.h>

/* wrapper ilogb */

int

M_DECL_FUNC (__ilogb) (FLOAT x)

{

  int r = M_SUF (__ieee754_ilogb) (x);

  if (__builtin_expect (r == FP_ILOGB0, 0)

      || __builtin_expect (r == FP_ILOGBNAN, 0)

      || __builtin_expect (r == INT_MAX, 0))

    {

      __set_errno (EDOM);

      __feraiseexcept (FE_INVALID);

    }

  return r;

}

declare_mgen_alias (__ilogb, ilogb)