/* Copyright (C) 2011-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.

   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 <math-svid-compat.h>

#include <libm-alias-double.h>

#if LIBM_SVID_COMPAT

/* wrapper pow */

double

__pow (double x, double y)

{

  double z = __ieee754_pow (x, y);

  if (__glibc_unlikely (!isfinite (z)))

    {

      if (_LIB_VERSION != _IEEE_)

	{

	  if (isfinite (x) && isfinite (y))

	    {

	      if (isnan (z))

		/* pow neg**non-int */

		return __kernel_standard (x, y, 24);

	      else if (x == 0.0 && y < 0.0)

		{

		  if (signbit (x) && signbit (z))

		    /* pow(-0.0,negative) */

		    return __kernel_standard (x, y, 23);

		  else

		    /* pow(+0.0,negative) */

		    return __kernel_standard (x, y, 43);

		}

	      else

		/* pow overflow */

		return __kernel_standard (x, y, 21);

	    }

	}

    }

  else if (__builtin_expect (z == 0.0, 0)

	   && isfinite (x) && x != 0 && isfinite (y)

	   && _LIB_VERSION != _IEEE_)

    /* pow underflow */

    return __kernel_standard (x, y, 22);

  return z;

}

libm_alias_double (__pow, pow)

#endif