Boundary run control system, boundary execution control method, and boundary execution control program

摘要

PPROBLEM TO BE SOLVED: To accelerate boundary generation during executing a vector store instruction and the issuing control of subsequent scalar load instructions and to eliminate a hardware amount. PSOLUTION: A control system for boundary execution is provided with a cache, a snoop processing circuit for performing snoop processing of the cache, and a boundary check circuit. The boundary check circuit stores at least either the minimum value or the maximum value of an address to be updated as a boundary and generates a mask from a result of an exclusive OR operation of the minimum value and the maximum value during executing a vector store instruction being an instruction to store a plurality of pieces of data in parallel, and determines whether to allow the scalar load instruction to be issued without waiting for the completion of the snoop processing on the basis of the boundary and the mask on requesting to issue the scalar load instruction to the cache. PCOPYRIGHT: (C)2010,JPO&INPIT