add design text

cme433_lrtestbench-main/src/approx_mult.sv

+module exact_mult (
+    input  logic signed [ 7:0] i_a,
+    input  logic signed [ 7:0] i_b,
+    output logic signed [15:0] o_z
+);
+  always_comb begin
+    o_z = i_a * i_b;
+  end
+endmodule : exact_mult

cme433_lrtestbench-main/src/design.txt

+Design for the booth multiplier a and b
+  1. add 0 to the end of b
+  2. divide b into 3 groups
+  3. calculate the partial products according to the groups
+  4. exchange the least 5 column with 1
+  5. add all the partial product together
+
+