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
module tb_multiplier(); reg [7:0] a, b; wire [15:0] product; integer errors, i, j; mult_8bit_comb uut (a, b, product); 8bit multiplier verilog code github
// 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,
: Educational FPGAs (like BASYS 3 or DE10-Lite), resource-constrained designs without DSP slices. Verilog Implementation #3: Sequential (Pipelined) Multiplier Best for low-area designs where speed is not critical. The multiplication takes 8 clock cycles. output [2*WIDTH-1:0] product )
module multiplier #(parameter WIDTH = 8) ( input [WIDTH-1:0] a, b, output [2*WIDTH-1:0] product ); assign product = a * b; endmodule For signed, use signed keyword:
Run with: