DATA FLOW TYPE PROCESSING APPARATUS HAVING EXTERNAL AND CACHE MEMORIES FOR FETCHING PAIRED EXECUTING INSTRUCTION WHEN MISHIT OCCURS

A data flow type information processing apparatus comprises a program control portion, a paired data detecting portion, an ALU and an external program memory. When the paired data detecting portion determines that program data and data to be processed to be paired are read out from a program storing portion, the data flow type information processing apparatus accesses the external program memory, transmits program data to be processed and non-processed data to the ALU and fetches a subsequent instruction for the operation processing result data of the ALU with respect to the program storing portion. If a mishit occurs in fetching of the instruction, the subsequent instruction is accessed directly together with the data to be processed with respect to the external program memory and executes fetching of the instruction with high efficiency.