Method and apparatus for improved computer load and store operations

(57) Loading and store operations in a summary computer system are extended, and a stream load, a store, loading by which the mask was carried out, and a store are offered. In stream operation, by a suitable argument, Reading of a data entity. CPU executes the stream command which shows the number of the entities which perform the 1st address 13 or the 1st register 17 which starts the 1st address 13 of the memory 11 or the 1st register 17 of the register file 15, and the memory of an entity to start and reading, or writing. In loading by which the mask was carried out, and the store operations (17, 18) by which the mask was carried out, the memorized mask is used and the pattern about the 1st address and register for loading and a store is shown. A bit string vector method is taught about a mask.