8bit Multiplier Verilog Code Github

8-bit Multiplier — Verilog (GitHub-ready full post)

Overview

This repo provides a compact, synthesizable 8-bit unsigned multiplier in Verilog with testbench, simulation guidance, and synthesis notes. The design is simple, easy to read, and suitable for learning, FPGA prototyping, or integration into larger designs.

1. Shift-and-Add (Sequential): Uses a state machine and a single adder. It takes $N$ clock cycles to complete. It is area-efficient but slow.
2. Wallace Tree: Uses a tree of carry-save adders. It is the fastest architecture but complex to route and design.
3. Array Multiplier: A combinational logic approach that mimics the "long multiplication" method we learned in school. It offers a balance between speed and regularity.

5. README.md for GitHub

# 8-bit Multiplier in Verilog
`timescale 1ns / 1ps
// Test 2: Exhaustive Test (Loop)
        // Note: 256*256 = 65,536 iterations. 
        // This might take a moment in simulation but ensures 100% coverage.
// Stage 3: Add with fourth partial product
ripple_carry_adder #(.WIDTH(10)) adder03 (
    .a(carry[1][0], sum[1][7:0]),
    .b(pp[3] << 3),
    .cin(1'b0),
    .sum(sum[2][7:0], product[1:0]),
    .cout(carry[2][0])
);
// Adder tree implementation
// ... (full adder and half adder instantiations)