ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,547,407, issued on Feb. 10, was assigned to Akeana Inc. (Santa Clara, Calif.).
"Return address stack with branch mispredict recovery" was invented by James Youngsae Cho (Los Gatos, Calif.) and Rabin Sugumar (Sunnyvale, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Techniques for providing a return address stack with branch mispredict recovery are disclosed. A processor core is accessed. The processor core includes a return address stack (RAS), a local cache hierarchy, and branch prediction logic. RAS state information, including a write pointer, a read pointer, and a RAS count, is sent to a branch execution unit. One or more call instructions ar...