公开(公告)号：US20190073223A1

公开(公告)日：2019-03-07

申请号：US15695733

申请日：2017-09-05

Applicant: QUALCOMM Incorporated

Inventor： Richard SENIOR ,  Raghuveer RAGHAVENDRA ,  Gurkanwal BRAR ,  Arvind GOVINDARAJ

IPC: G06F9/38 ,  G06F12/0855

Abstract: Systems and methods for branch prediction include detecting a subset of branch instructions which are not fixed direction branch instructions, and for this subset of branch instructions, utilizing complex branch prediction mechanisms such as a neural branch predictor. Detecting the subset of branch instructions includes using a state machine to determine the branch instructions whose outcomes change between a taken direction and a not-taken direction in separate instances of their execution. For the remaining branch instructions which are fixed direction branch instructions, the complex branch prediction techniques are avoided.