Amdahl Corporation

Daniel Carl Sobottka

Joseph A Petolino

Jeffrey A Thomas

Kevin L Daberkow

Christopher D Finan

In a data processing system including a pipelined instruction execution unit and a pipelined high speed cache, a storage queue consisting of a set of FIFO registers and associated support logic handles transfer of data from the pipeline instruction execution unit to the high speed cache. When a store request flow from the instruction execution pipeline is forwarded to the high speed cache, instead of placing the data directly into the high speed cache, the starting address, length of store and data to be stored are placed into one of the store queue registers. The instruction execution unit sees the store request as completed and continues processing even though data has not been physically placed in the high speed cache. The write to the high speed cache is finished in the background at a later time during an unused storage pipeline cycle in the high speed cache.

Monolithic semi-custom IC having standard LSI sections and coupling gate

In a pipeline data processing machine having a first unit for execution of instructions running according to a first pipeline and a second unit for storing data from a plurality of ports running according to a second pipeline, the first unit having a result register for holding results including data and address information of a flow of the first pipeline, the present invention provides an apparatus for transferring results in the result register to the second unit. A plurality of registers connected to the result register, each storing the result from at least one flow of the first pipeline and storing control information is provided. Further, a controller in communication with the second unit and the plurality of ports responsive to the control information and a flow of the second pipeline is included for selecting one of the plurality of ports in a first-in, first-out queue as a port to the second unit and for updating the control information.

Growing community of inventors

Chicago, IL, United States of America

Daniel Carl Sobottka