Accuracy of operand store compare prediction using confidence counter

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United States of America Patent

PATENT NO 9594566
SERIAL NO

15248478

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Abstract

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Technical solutions are described for dynamically managing an operand-store-compare (OSC) prediction table for load and store operations executed out-of-order. One general aspect includes a method that includes receiving a request to retire a queue entry corresponding to an instruction. The method also includes identifying an OSC prediction for the instruction based on an OSC prediction table entry, where the OSC prediction indicates if the instruction is predicted to hit an OSC hazard. The method also includes determining if the instruction hit the OSC hazard. The method also includes in response to the OSC prediction indicating that the instruction is predicted to hit the OSC hazard and the instruction not hitting the OSC hazard, invalidating the OSC prediction table entry corresponding to the instruction. The present document further describes examples of other aspects such as methods, computer products.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Alexander, Khary J Poughkeepsie, US 71 691
Bartik, Jane H Poughkeepsie, US 39 302
Bhartia, Jatin Ghaziabad, IN 16 51
Bonanno, James J Wappingers Falls, US 85 545
Collura, Adam B Hopewell Junction, US 39 144
Lee, Jang-Soo Poughkeepsie, US 19 107
Mitchell, James R Poughkeepsie, US 28 681
Saporito, Anthony Highland, US 155 788

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