test-ALU.v

//ALU passed test with 10,20 and with 10,-20
module ALU_testbench();
wire zero;
wire [31:0] output1;

reg [31:0] firstOperand, secondOperand;
reg [4:0] shamt;
reg [3:0] aluControlInput;

ALU alu(firstOperand, secondOperand, aluControlInput, output1, shamt, zero);

initial
begin
	#5	firstOperand = 10; secondOperand = -20; aluControlInput = 0; shamt = 0;
	#5	firstOperand = 10; secondOperand = -20; aluControlInput = 1; shamt = 0;
	#5	firstOperand = 10; secondOperand = -20; aluControlInput = 2; shamt = 0;
	#5	firstOperand = 10; secondOperand = -20; aluControlInput = 3; shamt = 1;
	#5	firstOperand = 10; secondOperand = -20; aluControlInput = 4; shamt = 1;
	#5	firstOperand = 10; secondOperand = -20; aluControlInput = 6; shamt = 0;
	#5	firstOperand = 10; secondOperand = -20; aluControlInput = 7; shamt = 0;
	#5	firstOperand = 10; secondOperand = -20; aluControlInput = 11; shamt = 0;
	#5	firstOperand = 10; secondOperand = -20; aluControlInput = 12; shamt = 0;
	#5 $finish;
end

initial
begin
	$monitor("time=%d first=%d second=%d shamt=%d alucontrolInput=%d output=%d zero=%d \n",$time,firstOperand,secondOperand,shamt,aluControlInput,output1,zero);
end

endmodule