The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 2016
Filed:
Jul. 23, 2013
International Business Machines Corporation, Armonk, NY (US);
Richard J. Eickemeyer, Rochester, MN (US);
Tejas Karkhanis, White Plains, NY (US);
Brian R. Konigsburg, Austin, TX (US);
David S. Levitan, Austin, TX (US);
Douglas R. G. Logan, Austin, TX (US);
Jose E. Moreira, Irvington, NY (US);
Mauricio J. Serrano, Bronx, NY (US);
GLOBALFOUNDRIES INC., Grand Cayman, KY;
Abstract
Tracking global history vector in high performance out of order superscalar processors, in one aspect, may comprise providing a shift register storing global history vector that stores branch predictions and outcomes. A counter is maintained to determine a number of bits to shift the shift register to recover branch history. In another aspect, the global history vector may be implemented with a circular buffer structure. Youngest and oldest pointers to the circular buffer are maintained and used in recovery.