alucont.v

module alucont(aluop1,aluop0,f5,f4,f3,f2,f1,f0,gout);//Figure 4.12 
input aluop1,aluop0,f5,f4,f3,f2,f1,f0;
output [2:0] gout;
reg [2:0] gout;
always @(aluop1 or aluop0 or f5 or f4 or f3 or f2 or f1 or f0)
begin
if(~(aluop1|aluop0))  gout=3'b010;
if(aluop0)gout=3'b110;
if(aluop1)//R-type
begin
	if (f5&(~f4)&(~f3)&(~f2)&(~f1)&(~f0)) gout=3'b010; 	//function code=0000,ALU control=010 (add)
	if (f1&f3)gout=3'b111;			//function code=1x1x,ALU control=111 (set on less than)
	if (f1&~(f3))gout=3'b110;		//function code=0x10,ALU control=110 (sub)
	if (f2&f0)gout=3'b001;			//function code=x1x1,ALU control=001 (or)
	if (f2&~(f0))gout=3'b000;		//function code=x1x0,ALU control=000 (and)

	if ((~f5)&f4&(~f3)&f2&(~f1)&(~f0)) gout=3'b010; //function code=20,ALU control=010 (add)
	if ((f5)&(~f4)&(~f3)&(f2)&(~f1)&(f0)) gout=3'b001; // //function code=37,ALU control=001 (or)
end
end
endmodule