8-bit Multiplier Verilog Code — Github

// Signed 8-bit multiplier input signed [7:0] a, b; output signed [15:0] product;

// Module: sequential_multiplier_8bit // Description: Low-area, sequential 8-bit multiplier using shift-and-add algorithm. module sequential_multiplier_8bit ( input wire clk, // Clock signal input wire reset, // Active-high synchronous reset input wire start, // Start signal to initiate multiplication input wire [7:0] a, // Multiplicand input wire [7:0] b, // Multiplier output reg [15:0] product, // 16-bit Product result output reg ready // High when multiplication is complete ); reg [7:0] multiplicand; reg [7:0] multiplier; reg [3:0] bit_count; reg [15:0] temp_product; always @(posedge clk) begin if (reset) begin product <= 16'h0000; ready <= 1'b0; bit_count <= 4'd0; temp_product <= 16'h0000; end else if (start && !ready) begin // Initialization phase multiplicand <= a; multiplier <= b; temp_product <= 16'h0000; bit_count <= 4'd0; ready <= 1'b0; end else if (bit_count < 4'd8) begin // Accumulate and shift phase if (multiplier[0]) begin temp_product <= temp_product + (multiplicand << bit_count); end multiplier <= multiplier >> 1; bit_count <= bit_count + 1'b1; end else if (bit_count == 4'd8) begin // Finalize output product <= temp_product; ready <= 1'b1; bit_count <= bit_count + 1'b1; // Prevent continuous execution end end endmodule Use code with caution. 3. Writing the Testbench for Verification

module full_adder ( input wire a, input wire b, input wire cin, output wire sum, output wire cout ); assign sum = a ^ b ^ cin; assign cout = (a & b) | (b & cin) | (a & cin); endmodule Use code with caution. 8-bit multiplier verilog code github

reg [15:0] product; reg [7:0] multiplicand; reg [7:0] multiplier; reg [3:0] state;

This module instantiates the partial products and chains them through structural adders to generate a 16-bit output. // Signed 8-bit multiplier input signed [7:0] a,

The combinatorial multiplier might fail timing if your FPGA clock is high (e.g., 500 MHz). Add a pipeline register.

Easiest to write; lets the synthesis tool optimize the hardware automatically. The combinatorial multiplier might fail timing if your

How many multiplication operations the circuit can complete per second. 2. Choosing the Right Multiplier Architecture

Not all Verilog code on GitHub is equal. Some are homework assignments with bugs; others are production-ready. When evaluating a repository for an , check for the following:

// Output the product assign product;