74LSxxx Logic IC library for FPGA
You need to re-think your approach to Verilog.

Being able to say c &lt;= a + b; (adder) or i &lt;= i + 1; (counter) on signals that can have arbitrary bit widths is much more concise and less error-prone than wiring up 4-bit chunks of 74xx logic.

Let the synthesis tool take care of all the low-level details for you!