mpq_t *			MPQ
mpz_t *			MPZ
mpf_t * 			MPF
mpfr_t *			MPFR
gmp_randstate_t *		GMP_RANDSTATE

INPUT
MPQ
            $var = INT2PTR($type, SvIV(SvRV($arg)))
MPZ
            $var = INT2PTR($type, SvIV(SvRV($arg)))
MPF
            $var = INT2PTR($type, SvIV(SvRV($arg)))
MPFR
            $var = INT2PTR($type, SvIV(SvRV($arg)))
GMP_RANDSTATE
            $var = INT2PTR($type, SvIV(SvRV($arg)))