generator.v

module generator(exp,line,score,clk,rst);
output[11:0] exp;
output[1:0] line;
input clk,rst;
input[6:0] score;
reg[5:0] num1,num2,ran1,ran2;
reg[3:0] op,num1_fin,num2_fin,ranop;
wire[3:0] op_fin;
always @(posedge clk or negedge rst) begin
	if (!rst) begin
		if(!ran1) num1 <= 6'b110110;
		else num1<=ran1;
		if(!ran2) num2 <= 6'b100101;
		else num2<=ran2;
		if(!ranop) op <= 4'b1010;
		else op<=ranop;
	end
	else begin
		num1[4:0] <= num1[5:1];
		num1[5] <= num1[1] ^ num1[0];
		num2[4:0] <= num2[5:1];
		num2[5] <= num2[1] ^ num2[0];
		op[2:0] <= op[3:1];
		op[3] <= op[1] ^ op[0];
		ran1<=ran1+1;
		ran2<=ran2+3;
		ranop<=ranop+1;
	end
end
always @(num1 or num2 or op_fin) begin
	if(num1%9+1<num2%9+1&&op_fin==4'hB) begin
		num1_fin <= num2%9+1;
		num2_fin <= num1%9+1;
	end
	else begin
		num1_fin <= num1%9+1;
		num2_fin <= num2%9+1;
	end
end

assign op_fin = (score>9?op[1:0]+4'hA:op[0]+4'hA);
assign line = op%3;
assign exp = {num1_fin,op_fin,num2_fin};
endmodule