Using if/else syntax for assign statements

Question

I have a wire to which I assign a complex right-hand-side expression with lots of bitwise operations. This right-hand-side expression is quickly becoming long and hard to maintain.

Is there a way I could replace the bitwise operations by if/else or case statements to help readability and maintability?

Answer 1

Sure you can, just use the always @(*) construct (you need to make it a reg). You can handle inout ports easily too.

reg res;
assign inout_port = dir_out? res: 1'bz;
always @(*) begin
    if (x == 42 && y != z)
        res = 10;
    else
        res = y * 12;
end