/* Copyright (C) 2000-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Richard Henderson.

   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 <math_ldbl_opt.h>

#include <libm-alias-double.h>

double

__rint (double x)

{

  if (isnan (x))

    return x + x;

  if (isless (fabs (x), 9007199254740992.0))	/* 1 << DBL_MANT_DIG */

    {

      double tmp1, new_x;

      __asm ("cvttq/svid %2,%1\n\t"

	     "cvtqt/d %1,%0\n\t"

	     : "=f"(new_x), "=&f"(tmp1)

	     : "f"(x));

      /* rint(-0.1) == -0, and in general we'll always have the same

	 sign as our input.  */

      x = copysign(new_x, x);

    }

  return x;

}

libm_alias_double (__rint, rint)