You are an expert Verilog hardware designer working on a complete FPGA or ASIC project. You are given the full source code of a Verilog project. One of the modules in the project is incomplete — its implementation is missing and marked with:

// >>> Module Implementation Begin

// <<< Module Implementation End

Your task is to complete the missing implementation so that the entire project functions correctly. You must infer what the missing module or logic is supposed to do by analyzing the rest of the codebase: module names, signal connections, instantiations, comments, and usage patterns.

Follow these rules:

1. Only generate Verilog code to go between the `// >>> Module Implementation Begin` and `// <<< Module Implementation End` comments.
2. Use Verilog-2001 syntax. Ensure the code is synthesizable.
3. Assume the goal is a working, integrated hardware design — your code must make the whole system function as intended.
4. Analyze the naming, I/O ports, and how the module is instantiated or used in other parts of the project.
5. Implement correct behavior based on design context. Do not guess randomly — reason it out.
6. Avoid vendor-specific features unless explicitly required.
7. Do not output comments, explanation, or anything outside the required code region unless explicitly asked.

Your output should contain **only the Verilog code** that fits inside the marked region.

/*
 * Copyright (c) 2024 Your Name
 * SPDX-License-Identifier: Apache-2.0
 */

`default_nettype none

module tt_um_secd_8_array_mult (
    input  wire [7:0] ui_in,    // Dedicated inputs
    output wire [7:0] uo_out,   // Dedicated outputs
    input  wire [7:0] uio_in,   // IOs: Input path
    output wire [7:0] uio_out,  // IOs: Output path
    output wire [7:0] uio_oe,   // IOs: Enable path (active high: 0=input, 1=output)
    input  wire       ena,      // always 1 when the design is powered, so you can ignore it
    input  wire       clk,      // clock
    input  wire       rst_n     // reset_n - low to reset
);
// >>> Module Implementation Begin

// <<< Module Implementation End
endmodule


module full_adder(m_in, p_in, c_in, s_out, c_out);
    input m_in, p_in, c_in;
    output s_out, c_out;
    wire w1, w2, w3;
    xor(w1, m_in, p_in);
    xor(s_out, w1, c_in);
    and(w2, w1, c_in);
    and(w3, m_in, p_in);
    or(c_out, w2, w3);
endmodule
    

  


Reference solution:
rtl/generated.v:     wire [3:0] m=ui_in[7:4];
    wire [3:0] q=ui_in[3:0];
    wire [7:0] p;
    wire [3:0] s0, s1, s2, s3, s4;
    wire [3:0] c0, c1, c2, c3, c4;
    wire [3:0] mp0, mp1, mp2, mp3;
    
    genvar i;
    generate
        for (i = 0; i < 4; i = i + 1) begin : and_gen
            assign mp0[i] = m[0] & q[i];
            assign mp1[i] = m[1] & q[i];
            assign mp2[i] = m[2] & q[i];
            assign mp3[i] = m[3] & q[i];
            assign c0[i] = 1'b0;
            assign s0[i] = mp0[i];
        end
    endgenerate
 

    full_adder m1p0 (mp1[0], s0[1], c0[0], s1[0], c1[0]);
    full_adder m1p1 (mp1[1], s0[2], c0[1], s1[1], c1[1]);
    full_adder m1p2 (mp1[2], s0[3], c0[2], s1[2], c1[2]);
    full_adder m1p3 (mp1[3], 1'b0, c0[3], s1[3], c1[3]);
    
    full_adder m2p0 (mp2[0], s1[1], c1[0], s2[0], c2[0]);
    full_adder m2p1 (mp2[1], s1[2], c1[1], s2[1], c2[1]);
    full_adder m2p2 (mp2[2], s1[3], c1[2], s2[2], c2[2]);
    full_adder m2p3 (mp2[3], 1'b0, c1[3], s2[3], c2[3]);
    
    full_adder m3p0 (mp3[0], s2[1], c2[0], s3[0], c3[0]);
    full_adder m3p1 (mp3[1], s2[2], c2[1], s3[1], c3[1]);
    full_adder m3p2 (mp3[2], s2[3], c2[2], s3[2], c3[2]);
    full_adder m3p3 (mp3[3], 1'b0, c2[3], s3[3], c3[3]);
    
    full_adder cp4(s3[1], c3[0], 1'b0, s4[0], c4[0]);
    full_adder cp5(s3[2], c3[1], c4[0], s4[1], c4[1]);
    full_adder cp6(s3[3], c3[2], c4[1], s4[2], c4[2]);
    full_adder cp7(1'b0, c3[3], c4[2], s4[3], c4[3]);
    
    assign p = {s4[3], s4[2], s4[1], s4[0], s3[0], s2[0], s1[0], s0[0]};
    assign uo_out  = p;  // Example: ou_out is the sum of ui_in and uio_in
    assign uio_out = 0;
    assign uio_oe  = 0;

  // List all unused inputs to prevent warnings
    wire _unused = &{ena, clk, rst_n, uio_in,1'b0};