Information processing apparatus for realizing data transfer for a

Abstract

An information processing apparatus for executing a program, the apparatus including: a register set made up of a plurality of registers; a decoding unit for decoding machine language instructions in the program and extracting a selected instruction which indicates data transfer between a plurality of registers designated by a first operand, which is made up of a single field of at least one bit which shows whether an individual register out of the register set is designated and a group field which shows whether a plurality of other registers out of the register set are designated as a group, and consecutive addresses of memory designated by a second operand as an effective address of memory; a determining unit for determining whether each bit in the single field and group field of the first operand of the extracted machine language instruction is valid; a first generating unit for generating a register number for a register corresponding to a bit determined as being valid in the single field, a second generating unit for generating in order a register number of each register to which the group field relates, when a bit in the group field has been determined as being valid; and a transferring unit for executing data transfer between the registers identified by the register numbers generated by the first generating unit and the second generating unit and the consecutive memory areas starting from the effective address.