贴代码如下：
module multiplier_8(clk,rst_n,mul_a,mul_b,result
);
input clk;
input rst_n;
input[7:0] mul_a;
input[7:0] mul_b;
output[15:0] result;
reg[15:0] result;
reg[15:0] store7;
reg[15:0] store6;
reg[15:0] store5;
reg[15:0] store4;
reg[15:0] store3;
reg[15:0] store2;
reg[15:0] store1;
reg[15:0] store0;
reg[15:0] add01;
reg[15:0] add23;
reg[15:0] add45;
reg[15:0] add67;
reg[15:0] add0123;
reg[15:0] add4567;
always @ (posedge clk or negedge rst_n)
begin
if(!rst_n)
begin
store7 <= 16'b0;
store6 <= 16'b0;
store5 <= 16'b0;
store4 <= 16'b0;
store6 <= 16'b0;
store2 <= 16'b0;
store1 <= 16'b0;
store0 <= 16'b0;
add01 <= 16'b0;
add23 <= 16'b0;
add45 <= 16'b0;
add67 <= 16'b0;
add0123 <= 16'b0;
add4567 <= 16'b0;
end
else
begin
store7 <= mul_b[7] ? {1'b0,mul_a,7'b0}:16'b0;
store6 <= mul_b[6] ? {2'b0,mul_a,6'b0}:16'b0;
store5 <= mul_b[5] ? {3'b0,mul_a,5'b0}:16'b0;
store4 <= mul_b[4] ? {4'b0,mul_a,4'b0}:16'b0;
store3 <= mul_b[3] ? {5'b0,mul_a,3'b0}:16'b0;
store2 <= mul_b[2] ? {6'b0,mul_a,2'b0}:16'b0;
store1 <= mul_b[1] ? {7'b0,mul_a,1'b0}:16'b0;
store0 <= mul_b[0] ? {8'b0,mul_a}:16'b0;
add67 <= store7+store6;
add45 <= store5+store4;
add23 <= store3+store2;
add01 <= store1+store0;
add0123 <= add01 + add23;
add4567 <= add45 + add67;
result <= add0123 + add4567;
end
end
endmodule
代码说明如下：
两个N位二进制数经x,y的乘积用简单的方法计算就是利用移位操作来实现，用公式可以表示为：
这样，输入最随着k的位置连续地变化，然后累加
。
仿真图如下：
