Review Board 2.0.15


isa: Add parameter to pick different decoder inside ISA

Review Request #3033 - Created Aug. 12, 2015 and submitted

Information
Curtis Dunham
gem5
default
Reviewers
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The decoder is responsible for splitting instructions in micro

operations (uops). Given that different micro architectures may split

operations differently, this patch allows to specify which micro

architecture each isa implements, so different cores in the system can

split instructions differently, also decoupling uop splitting

(microArch) from ISA (Arch). This is done making the decodification

calls templates that receive a type 'DecoderFlavour' that maps the

name of the operation to the class that implements it. This way there

is only one selection point (converting the command line enum to the

appropriate DecodeFeatures object). In addition, there is no explicit

code replication: template instantiation hides that, and the compiler

should be able to resolve a number of things at compile-time.

   

  


 


 

  

  






 
 
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Review request changed

   
Updated  (Oct. 9, 2015, 12:57 p.m.)

  

  


   

    Status:
    

    Closed (submitted)