Questions

1. A packed array is used to infer memories. True or false?
2. A break statement can be used in a for loop when?

   a) Any time.

   b) If it's possible to rewrite the for loop in such a way as to not need the break.

   c) Only if you can reverse the direction of the loop; that is, go from low to high instead of high to low.

3. Size the add_unsigned, add_signed, and mult signals:

   Logic unsigned [7:0] a_unsigned;
   logic unsigned [7:0] b_unsigned;
   logic signed [7:0] a_signed;
   logic signed [7:0] b_signed;
   assign add_unsigned = a_unsigned + b_unsigned;
   assign add_signed = a_signed + b_signed;
   assign mult = a_unsigned * b_unsigned;

4. Division is a very costly operation. Look at the supported Vivado constructs in the Vivado Synthesis manual (Further reading). Can you easily replace the multiply operation with a division operation? What is possible without custom code?

Challenge

Look at the following add_sub module:

  logic signed [BITS/2-1:0]   ...