#define n_prefix		$0x00000000		// 000
#define d_prefix		$0x20000000		// 001
#define k_prefix		$0x40000000		// 010
#define c_prefix		$0x60000000		// 011
#define t_prefix		$0x80000000		// 100
#define r_prefix		$0xa0000000		// 101