Review Board 2.0.15


cpu: Fix incorrect speculative branch predictor behavior

Review Request #2298 - Created June 12, 2014 and submitted

Information
Ali Saidi
gem5
default
Reviewers
Default 
Changeset 10253:992be57d8ca3
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cpu: Fix incorrect speculative branch predictor behavior

When a branch mispredicted gem5 would squash all history after and including
the mispredicted branch.  However, the mispredicted branch is still speculative
and its history is required to rollback state if another, older, branch
mispredicts.  This leads to things like RAS corruption.


   

  


 


 

  

  









  
 


  

 


















 













 



 


















 













 



 

  


 

  

   

   
Review request changed

   
Updated  (Sept. 3, 2014, 4:40 a.m.)

  

  


   

    Status:
    

    Closed (submitted)