METHOD AND DEVICE FOR ACCESSING EXCLUSIVE REGISTER CONTAINED IN PROCESSOR

摘要

PROBLEM TO BE SOLVED: To provide an improved method/device which accesses an exclusive register contained in a processor and can eliminate a delay that is caused by accessing the exclusive register. SOLUTION: In this method/device for accessing an exclusive register contained in a processor, a cache inhibition bit and an exclusive register access bit are supplied. A group of exclusive registers 34 is connected to a data cache 13 via a cache bypass bus 31. The bus 31 is available for a cache inhibition access when the cache inhibition bit is shown. However, the data obtained via the operations of the register 34 can be sent to the registers 34 via the bus 31 when the exclusive register access bit is shown.