Mercurial > pygar

     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
author	rlm
date	Tue, 27 Apr 2010 23:31:38 -0400
parents	74716e9a81cc
children	52f9a257c2ba