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/* Truncate argument to nearest integral value not larger than the argument.

   Copyright (C) 1997, 1999 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, write to the Free

   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

   02111-1307 USA.  */

#include "quadmath-imp.h"

__float128

truncq (__float128 x)

{

  int32_t j0;

  uint64_t i0, i1, sx;

  GET_FLT128_WORDS64 (i0, i1, x);

  sx = i0 & 0x8000000000000000ULL;

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

  if (j0 < 48)

    {

      if (j0 < 0)

        /* The magnitude of the number is < 1 so the result is +-0.  */

        SET_FLT128_WORDS64 (x, sx, 0);

      else

        SET_FLT128_WORDS64 (x, i0 & ~(0x0000ffffffffffffLL >> j0), 0);

    }

  else if (j0 > 111)

    {

      if (j0 == 0x4000)

        /* x is inf or NaN.  */

        return x + x;

    }

  else

    {

      SET_FLT128_WORDS64 (x, i0, i1 & ~(0xffffffffffffffffULL >> (j0 - 48)));

    }

  return x;

}