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view core/src/BRegFile.bsv @ 1:91a1f76ddd62 pygar svn.2

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[svn r2] Adding initial lab 5 source
author punk
date Tue, 13 Apr 2010 17:34:33 -0400
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     1 import RegFile::*;



     2 import RWire::*;



     3 import ProcTypes::*;



     4 



     5 //-----------------------------------------------------------



     6 // Register file module



     7 //-----------------------------------------------------------



     8 



     9 interface BRegFile #(type index_t, type data_t);



    10    method Action upd(index_t addr, data_t data);



    11    method data_t sub(index_t addr);



    12 endinterface



    13 



    14 module mkBRegFile(RegFile#(index_t, data_t)) 



    15    provisos (Bits#(index_t, size_index),



    16 	     Bits#(data_t, size_data),



    17 	     Eq#(index_t),



    18 	     Bounded#(index_t) );



    19 



    20    RegFile#(index_t, data_t) rf <- mkRegFileWCF(minBound, maxBound);



    21    RWire#(Tuple2#(index_t, data_t)) rw <-mkRWire();



    22 



    23    method Action upd (index_t r, data_t d);



    24       rf.upd(r,d);



    25       rw.wset(tuple2(r,d));



    26    endmethod



    27 



    28    method data_t sub (index_t r);



    29       case (rw.wget()) matches



    30 	 tagged Valid {.wr, .d} :



    31 	    return (wr == r) ? d : rf.sub(r);



    32 	 tagged Invalid : return rf.sub(r);



    33       endcase



    34    endmethod



    35    



    36 endmodule