/* Round long double to integer away from zero.

   Copyright (C) 1997-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and

		  Jakub Jelinek <jj@ultra.linux.cz>, 1999.

   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_private.h>

#include <libm-alias-ldouble.h>

#include <math-use-builtins.h>

_Float128

__roundl (_Float128 x)

{

#if USE_ROUNDL_BUILTIN

  return __builtin_roundl (x);

#else

  /* Use generic implementation.  */

  int32_t j0;

  uint64_t i1, i0;

  GET_LDOUBLE_WORDS64 (i0, i1, x);

  j0 = ((i0 >> 48) & 0x7fff) - 0x3fff;

  if (j0 < 48)

    {

      if (j0 < 0)

	{

	  i0 &= 0x8000000000000000ULL;

	  if (j0 == -1)

	    i0 |= 0x3fff000000000000LL;

	  i1 = 0;

	}

      else

	{

	  uint64_t i = 0x0000ffffffffffffLL >> j0;

	  if (((i0 & i) | i1) == 0)

	    /* X is integral.  */

	    return x;

	  i0 += 0x0000800000000000LL >> j0;

	  i0 &= ~i;

	  i1 = 0;

	}

    }

  else if (j0 > 111)

    {

      if (j0 == 0x4000)

	/* Inf or NaN.  */

	return x + x;

      else

	return x;

    }

  else

    {

      uint64_t i = -1ULL >> (j0 - 48);

      if ((i1 & i) == 0)

	/* X is integral.  */

	return x;

      uint64_t j = i1 + (1LL << (111 - j0));

      if (j < i1)

	i0 += 1;

      i1 = j;

      i1 &= ~i;

    }

  SET_LDOUBLE_WORDS64 (x, i0, i1);

  return x;

#endif /* ! USE_ROUNDL_BUILTIN  */

}

libm_alias_ldouble (__round, round)