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/**
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/**
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 * GMP BigInteger Engine
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 * GMP BigInteger Engine
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 *
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 *
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 * PHP version 5 and 7
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 * PHP version 5 and 7
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 *
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 *
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 * @category  Math
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 * @package   BigInteger
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 * @author    Jim Wigginton <terrafrost@php.net>
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 * @author    Jim Wigginton <terrafrost@php.net>
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 * @copyright 2017 Jim Wigginton
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 * @copyright 2017 Jim Wigginton
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 * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
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 * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
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 * @link      http://pear.php.net/package/Math_BigInteger
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 * @link      http://pear.php.net/package/Math_BigInteger
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 */
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 */
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use phpseclib3\Exception\BadConfigurationException;
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use phpseclib3\Exception\BadConfigurationException;
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/**
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/**
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 * GMP Engine.
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 * GMP Engine.
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 *
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 *
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 * @package GMP
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 * @author  Jim Wigginton <terrafrost@php.net>
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 * @author  Jim Wigginton <terrafrost@php.net>
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 * @access  public
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 */
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 */
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class GMP extends Engine
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class GMP extends Engine
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{
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{
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    /**
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    /**
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     * Can Bitwise operations be done fast?
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     * Can Bitwise operations be done fast?
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     *
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     *
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     * @see parent::bitwise_leftRotate()
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     * @see parent::bitwise_leftRotate()
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     * @see parent::bitwise_rightRotate()
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     * @see parent::bitwise_rightRotate()
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     * @access protected
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     */
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     */
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    const FAST_BITWISE = true;
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    const FAST_BITWISE = true;
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    /**
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    /**
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     * Engine Directory
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     * Engine Directory
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     *
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     *
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     * @see parent::setModExpEngine
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     * @see parent::setModExpEngine
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     * @access protected
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     */
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     */
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    const ENGINE_DIR = 'GMP';
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    const ENGINE_DIR = 'GMP';
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    /**
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    /**
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     * Test for engine validity
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     * Test for engine validity
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     *
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     *
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     * {@internal Could return $this->subtract($x), but that's not as fast as what we do do.}
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     * {@internal Could return $this->subtract($x), but that's not as fast as what we do do.}
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     *
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     *
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     * @param GMP $y
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     * @param GMP $y
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     * @return int in case < 0 if $this is less than $y; > 0 if $this is greater than $y, and 0 if they are equal.
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     * @return int in case < 0 if $this is less than $y; > 0 if $this is greater than $y, and 0 if they are equal.
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     * @access public
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     * @see self::equals()
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     * @see self::equals()
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     */
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     */
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    public function compare(GMP $y)
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    public function compare(GMP $y)
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    {
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    {
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        $r = gmp_cmp($this->value, $y->value);
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        $r = gmp_cmp($this->value, $y->value);
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    /**
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    /**
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     * Absolute value.
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     * Absolute value.
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     *
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     *
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     * @return GMP
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     * @return GMP
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     * @access public
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     */
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     */
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    public function abs()
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    public function abs()
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    {
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    {
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        $temp = new self();
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        $temp = new self();
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        $temp->value = gmp_abs($this->value);
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        $temp->value = gmp_abs($this->value);