第一个乘法器程序

一、源程序：

module usemultiplier(CLK,multiplimcand,multiplier,cout,RST);

input CLK,RST;
input [7:0] multiplimcand;
input [7:0] multiplier;

output [15:0] cout;    

reg [7:0] mcandtmp ,ertmp;
reg [15:0] out,cout;
reg [2:0] x;

always @ (posedge CLK , negedge RST)
begin

    if(RST==0)
    begin
        mcandtmp<=0;
        ertmp<=0;
        out<=0;
        x=0;
    end
    case (x)
        0:    begin
            mcandtmp<=multiplimcand[7]?(~multiplimcand+1):multiplimcand;
            ertmp<=multiplier[7]?(~multiplier+1):multiplier;
            out<=0;
            x=x+1;
            end
            
        1:if(ertmp==0) x=x+1;
          else begin
          ertmp<=ertmp-1;
          out<=out+mcandtmp;
          end
         
        2:begin
          cout<=(multiplimcand[7]^multiplier[7])?~out+1:out;
          x=0;
          end
         default:;
    endcase
end    

endmodule

二、仿真结果：