公开(公告)号：GB2562651A

公开(公告)日：2018-11-21

申请号：GB201811397

申请日：2016-12-07

Applicant: IBM

Inventor： JAMES JOSEPH BONANNO ,  MICHAEL JOSEPH CADIGAN ,  MATTHIAS DIETMAR HEIZMANN ,  BRIAN ROBERT PRASKY

IPC: G06F9/38

Abstract: According to an aspect, management of auxiliary branch prediction in a processing system including a primary branch predictor and an auxiliary branch predictor is provided. A congruence class of the auxiliary branch predictor is located based on receiving a primary branch predictor misprediction indicator corresponding to a mispredicted target address of the primary branch predictor. An entry is identified in the congruence class having an auxiliary usefulness level set to a least useful level with respect to one or more other entries of the congruence class. Auxiliary data corresponding to the mispredicted target address is installed into the entry. The auxiliary usefulness level of the entry is reset to an initial value based on installing the auxiliary data.

公开(公告)号：GB2517876B

公开(公告)日：2017-03-22

申请号：GB201500043

申请日：2013-05-20

Applicant: IBM

Inventor： BRIAN ROBERT PRASKY ,  ALEXANDER VASILEVSKIY ,  JAMES JOSEPH BONANNO ,  JORAN SIU ,  MARCEL MITRAN ,  TIMOTHY SLEGEL

IPC: G06F9/38 ,  G06F9/30

公开(公告)号：GB2562651B

公开(公告)日：2019-04-10

申请号：GB201811397

申请日：2016-12-07

Applicant: IBM

Inventor： JAMES JOSEPH BONANNO ,  MICHAEL JOSEPH CADIGAN ,  MATTHIAS DIETMAR HEIZMANN ,  BRIAN ROBERT PRASKY

IPC: G06F9/38

Abstract: According to an aspect, management of auxiliary branch prediction in a processing system including a primary branch predictor and an auxiliary branch predictor is provided. A congruence class of the auxiliary branch predictor is located based on receiving a primary branch predictor misprediction indicator corresponding to a mispredicted target address of the primary branch predictor. An entry is identified in the congruence class having an auxiliary usefulness level set to a least useful level with respect to one or more other entries of the congruence class. Auxiliary data corresponding to the mispredicted target address is installed into the entry. The auxiliary usefulness level of the entry is reset to an initial value based on installing the auxiliary data.