receiving, by the direct memory access apparatus, an object data moving instruction and decoding the object data moving instruction, wherein the object data moving instruction comprises a first field, and the first field of the object data moving instruction indicates a data moving operation for a neural-network processor; and

executing, by the direct memory access apparatus, the object data moving instruction,

wherein the object data moving instruction comprises a first data moving instruction, the first data moving instruction comprises a second field, and the second field of the first data moving instruction indicates data moving address information, and

wherein the neural-network processor comprises at least one processing unit array, and the data moving address information is obtained based on a mapping relationship between data to be moved and at least one processing unit in the processing unit array.