/* Return the least floating-point number greater than X.

   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 <float.h>

#include <math.h>

#include <math_private.h>

#include <libm-alias-ldouble.h>

/* Return the least floating-point number greater than X.  */

_Float128

__nextupl (_Float128 x)

{

  int64_t hx, ix;

  uint64_t lx;

  GET_LDOUBLE_WORDS64 (hx, lx, x);

  ix = hx & 0x7fffffffffffffffLL;

  /* x is nan.  */

  if (((ix >= 0x7fff000000000000LL)

       && ((ix - 0x7fff000000000000LL) | lx) != 0))

    return x + x;

  if ((ix | lx) == 0)

    return LDBL_TRUE_MIN;

  if (hx >= 0)

    {				/* x > 0.  */

      if (isinf (x))

        return x;

      lx++;

      if (lx == 0)

        hx++;

    }

  else

    {				/* x < 0.  */

      if (lx == 0)

        hx--;

      lx--;

    }

  SET_LDOUBLE_WORDS64 (x, hx, lx);

  return x;

}

libm_alias_ldouble (__nextup, nextup)