//4×4 查找表乘法器

module mult4x4(out,a,b,clk)

output[7:0] out

input[3:0] a,b

input clk

reg[7:0] out

reg[1:0] firsta,firstb

reg[1:0] seconda,secondb

wire[3:0] outa,outb,outc,outd

always @(posedge clk)

begin

firsta = a[3:2] seconda = a[1:0]

firstb = b[3:2] secondb = b[1:0]

end

lookup m1(outa,firsta,firstb,clk),

m2(outb,firsta,secondb,clk),

m3(outc,seconda,firstb,clk),

m4(outd,seconda,secondb,clk) //模块调用