Introduction Digital multiplication is a cornerstone of modern computing — from simple microcontrollers to high-performance DSP chips. For FPGA and ASIC designers, implementing an efficient 8-bit multiplier in Verilog is a rite of passage. Whether you're a student wrapping up your computer architecture lab or an engineer optimizing resource usage, the search query "8bit multiplier verilog code github" represents a quest for proven, reusable, and synthesizable designs.
module sequential_multiplier_8bit ( input clk, rst, start, input [7:0] a, b, output reg [15:0] product, output reg done ); reg [2:0] count; reg [7:0] multiplicand, multiplier; reg [15:0] acc; always @(posedge clk or posedge rst) begin if (rst) begin count <= 0; done <= 0; product <= 0; acc <= 0; end else if (start) begin count <= 0; multiplicand <= a; multiplier <= b; acc <= 0; done <= 0; end else if (!done && count < 8) begin if (multiplier[0]) acc <= acc + 8'b0, multiplicand; multiplicand <= multiplicand << 1; multiplier <= multiplier >> 1; count <= count + 1; end else if (count == 8 && !done) begin product <= acc; done <= 1; end end endmodule 8bit multiplier verilog code github
module wallace_tree_8bit ( input [7:0] A, B, output [15:0] P ); // Step 1: generate partial products wire [7:0] pp[0:7]; genvar i, j; generate for(i = 0; i < 8; i = i+1) begin assign pp[i] = 8A[i] & B; end endgenerate // Step 2: reduction using full/half adders (not shown in full) // The tree would reduce 8 vectors to 2 vectors (sum and carry) wire [15:0] sum_vec, carry_vec; module sequential_multiplier_8bit ( input clk
module array_multiplier_8bit ( input [7:0] A, B, output [15:0] P ); wire [7:0] pp0, pp1, pp2, pp3, pp4, pp5, pp6, pp7; wire [15:0] sum_stage0, sum_stage1, sum_stage2, sum_stage3; // Generate partial products (AND gates) assign pp0 = 8A[0] & B; assign pp1 = 8A[1] & B; assign pp2 = 8A[2] & B; assign pp3 = 8A[3] & B; assign pp4 = 8A[4] & B; assign pp5 = 8A[5] & B; assign pp6 = 8A[6] & B; assign pp7 = 8A[7] & B; input [7:0] a
// Adder tree (simplified example – real design uses full adders) assign sum_stage0 = 8'b0, pp0 + 7'b0, pp1, 1'b0; assign sum_stage1 = sum_stage0 + 6'b0, pp2, 2'b0; // ... continue for all partial products assign P = sum_stage3; // Final result after all additions endmodule
module booth_multiplier_8bit ( input signed [7:0] a, b, // signed 8-bit inputs output signed [15:0] product ); reg signed [15:0] pp [0:3]; integer i; always @(*) begin // Radix-4 Booth encoding of B // Simplified example: actual impl requires recoding logic for (i = 0; i < 4; i = i + 1) begin case (b[2*i+1], b[2*i], b[2*i-1]) // ... booth encoding cases default: pp[i] = 16'sb0; endcase end product = pp[0] + pp[1] + pp[2] + pp[3]; end endmodule