+ irop_flag_keep = 0x00000100, /**< this operation can be kept in End's keep-alive list */
+ irop_flag_machine = 0x00000200, /**< this operation is a machine operation */
+ irop_flag_machine_op = 0x00000400, /**< this operation is a machine operand */
+ irop_flag_user = 0x00000800 /**< this flag and all higher one are free for machine user */