Intel Corporation

Richard W Goe

Sailesh Kottapalli

George Thangadurai

Vijay Kumar Goru

Youngsoo Choi

A method and apparatus for using result-speculative data under run-ahead speculative execution is disclosed. In one embodiment, the uncommitted target data from instructions being run-ahead executed may be saved into an advance data table. This advance data table may be indexed by the lines in the instruction buffer containing the instructions for run-ahead execution. When the instructions are re-executed subsequent to the run-ahead execution, valid target data may be retrieved from the advance data table and supplied as part of a zero-clock bypass to support parallel re-execution. This may achieve parallel execution of dependent instructions. In other embodiments, the advance data table may be content-addressable-memory searchable on target registers and supply target data to general speculative execution.

Method and apparatus for results speculation under run-ahead execution

A system and method is provided for processing interrupt requests. The method is accomplished by detecting when an interrupt request is being stored in a storage location, examining the storage location storing the interrupt request, prioritizing the interrupt request when more than one interrupt request is stored in the storage location to determine an interrupt request processing order, clearing the interrupt request in the storage location that is to be processed, and processing the interrupt request. The system comprises a first storage location for storing an interrupt request, a second storage location for storing an interrupt handler program with encoded statements for examining the first storage location, prioritizing the interrupt request that is to be processed if more than one interrupt request is stored in said first storage location, clearing the interrupt request that is to be processed, and processing the interrupt request. The system further comprises a processor for executing the interrupt handler program.

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Santa Clara, CA, United States of America

Richard W Goe