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

   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.

   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-float.h>

float

__truncf (float x)

{

  int32_t i0, j0;

  int sx;

  GET_FLOAT_WORD (i0, x);

  sx = i0 & 0x80000000;

  j0 = ((i0 >> 23) & 0xff) - 0x7f;

  if (j0 < 23)

    {

      if (j0 < 0)

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

	SET_FLOAT_WORD (x, sx);

      else

	SET_FLOAT_WORD (x, sx | (i0 & ~(0x007fffff >> j0)));

    }

  else

    {

      if (j0 == 0x80)

	/* x is inf or NaN.  */

	return x + x;

    }

  return x;

}

#ifndef __truncf

libm_alias_float (__trunc, trunc)

#endif