Method and system for speculatively issuing instructions

Method and system for speculatively issuing instructions

1. Technical Field A method and system for speculatively issuing instructions which are dependent upon results from execution of other instructions. Instructions are speculatively issued, dependent upon a result from execution of a primary instruction, wherein the speculatively issued instructions a...

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Hauptverfasser: Cheong, Hoichi, Delaney, Maureen A, Le, Hung Qui, McDonald, Robert, Nguyen, Dung Quoc, Victor, David Wayne
Format: Patent
Sprache:eng
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creator Cheong, Hoichi
Delaney, Maureen A
Le, Hung Qui
McDonald, Robert
Nguyen, Dung Quoc
Victor, David Wayne
description 1. Technical Field A method and system for speculatively issuing instructions which are dependent upon results from execution of other instructions. Instructions are speculatively issued, dependent upon a result from execution of a primary instruction, wherein the speculatively issued instructions are issued after execution of the primary instruction. N clock cycles are tracked after execution of the primary instruction, wherein the result from execution of said primary instruction is expected within n clock cycles. Execution of any speculatively issued instructions which are dependent upon the primary instruction is cancelled if the result is not returned from execution of the primary instruction within n clock cycles, such that for primary instructions for which the result is returned within the expected n clock cycles any speculatively issued instructions dependent upon said result are executed with increased efficiency.
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Technical Field A method and system for speculatively issuing instructions which are dependent upon results from execution of other instructions. Instructions are speculatively issued, dependent upon a result from execution of a primary instruction, wherein the speculatively issued instructions are issued after execution of the primary instruction. N clock cycles are tracked after execution of the primary instruction, wherein the result from execution of said primary instruction is expected within n clock cycles. Execution of any speculatively issued instructions which are dependent upon the primary instruction is cancelled if the result is not returned from execution of the primary instruction within n clock cycles, such that for primary instructions for which the result is returned within the expected n clock cycles any speculatively issued instructions dependent upon said result are executed with increased efficiency.</abstract><oa>free_for_read</oa></addata></record>
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title Method and system for speculatively issuing instructions
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