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// baeckler - 12-12-2006
// helper function to compute LOG base 2
//
// NOTE - This is a somewhat abusive definition of LOG2(v) as the
//   number of bits required to represent "v".  So log2(256) will be
//   9 rather than 8 (256 = 9'b1_0000_0000).  I apologize for any
//   confusion this may cause.
//

function integer log2;
  input integer val;
  begin
	 log2 = 0;
	 while (val > 0) begin
	    val = val >> 1;
		log2 = log2 + 1;
	 end
  end
endfunction