/* Round a double value to a long long in the current rounding mode.

   Copyright (C) 1997-2018 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 <limits.h>

#include <math.h>

#include <math_ldbl_opt.h>

#include <math_private.h>

#include <stdint.h>

#include <libm-alias-double.h>

long long int

__llrint (double x)

{

  double rx = __rint (x);

  if (HAVE_PPC_FCTIDZ || rx != x)

    return (long long int) rx;

  else

    {

      /* Avoid incorrect exceptions from libgcc conversions (as of GCC

	 5): <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59412>.  */

      if (fabs (rx) < 0x1p31)

	return (long long int) (long int) rx;

      uint64_t i0;

      EXTRACT_WORDS64 (i0, rx);

      int exponent = ((i0 >> 52) & 0x7ff) - 0x3ff;

      if (exponent < 63)

	{

	  unsigned long long int mant

	    = (i0 & ((1ULL << 52) - 1)) | (1ULL << 52);

	  if (exponent < 52)

	    mant >>= 52 - exponent;

	  else

	    mant <<= exponent - 52;

	  return (long long int) ((i0 & (1ULL << 63)) != 0 ? -mant : mant);

	}

      else if (rx == (double) LLONG_MIN)

	return LLONG_MIN;

      else

	return (long long int) (long int) rx << 32;

    }

}

libm_alias_double (__llrint, llrint)