INSTRUCTION ADVANCE READ DEVICE

PURPOSE:To efficiently use the capacity of a storage device by arranging an instruction buffer and a branch forecast buffer in each of plural storage devices and simultaneously reading out an instruction word and branch forecast information. CONSTITUTION:When an even address is outputted from an instruction advance read address counter 1, an instruction word and branch forecast information are read out of an instruction buffer 4a of a storage device 4 and a branch forecast buffer 5b of a storage device 5 respectively; and when an odd address is outputted, the instruction word and branch forecast information are read out of an instruction buffer 5a of the storage device 5 and a branch forecast buffer 4b of the storage device 4 respectively. By this constitution, large-capacity memory chips are used as storage devices 4 and 5 to reduce the number of chips, and the number of input terminals is reduced; and thus, capacities of storage devices 4 and 5 realizing instruction buffers 4a and 5a and branch forecast buffers 4b and 5b are efficiently used without a disadvantage in the extent of delay.