/* Test whether X == Y.

   Copyright (C) 2016-2018 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 <errno.h>

#include <fenv.h>

#include <math.h>

#include <math_private.h>

#include <stdbool.h>

#include <fix-fp-int-compare-invalid.h>

int

M_DECL_FUNC (__iseqsig) (FLOAT x, FLOAT y)

{

  /* Comparing <= and >= is sufficient to determine both whether X and

     Y are equal, and whether they are unordered, while raising the

     "invalid" exception if they are unordered.  */

  bool cmp1 = x <= y;

  bool cmp2 = x >= y;

  if (cmp1 && cmp2)

    return 1;

  else if (!cmp1 && !cmp2)

    {

      if (FIX_COMPARE_INVALID)

	__feraiseexcept (FE_INVALID);

      __set_errno (EDOM);

    }

  return 0;

}