Added comments to Logic Unit (Q2) and added to submission file

tests/lu_tb.sv

@@ -5,12 +5,12 @@ module lu_tb #(parameter W=4)();
     logic [W-1:0] A;
     logic [W-1:0] B;
     logic [W-1:0] C;
-    logic [W-1:0] C_exp[16];
+    logic [W-1:0] C_exp[16]; // expected values
 
-    lu #(W/2) dut(op, A, B, C);
+    lu #(W/2) dut(op, A, B, C); // width / 2 as was adapted from width-1 being standard
 
     integer error_count;
-    initial begin
+    initial begin // only need to check 1 bit for expected functionality
         // AND
         C_exp[0]  = {{W{1'b0}}, {1'b0}};
         C_exp[1]  = {{W{1'b0}}, {1'b0}};
@@ -36,7 +36,7 @@ module lu_tb #(parameter W=4)();
         op = 0;
         A = 0;
         B = 0;
-        $display("Beginning LU tests");
+        $display("Beginning LU tests"); // find difference between calculated and excpected
         for (integer N = 0; N < 4; ++N) begin
             for (integer M = 0; M < 2; ++M) begin
                 for (integer K = 0; K < 2; ++K) begin