ALU decoder.v

module ALU_decoder(
    input [2:0] funct3,
    input funct7,op5,
    input [1:0] ALUOp,
    output reg [2:0] ALUControl
);
always@(*)begin
    case(ALUOp)
    2'b00:ALUControl=3'b000;
    2'b01:begin
        case(funct3)
        3'b000:ALUControl=3'b010;
        3'b001:ALUControl=3'b010;
        3'b100:ALUControl=3'b010;
        default:ALUControl=3'b000;
        endcase
    end
    2'b10:begin
        case(funct3)
        3'b000:begin
            if({op5,funct7}==2'b11)
                ALUControl=3'b010;
            else
                ALUControl=3'b000;
        end
        3'b001:ALUControl=3'b001;
        3'b100:ALUControl=3'b100;
        3'b101:ALUControl=3'b101;
        3'b110:ALUControl=3'b110;
        3'b111:ALUControl=3'b111;
        default:ALUControl=3'b000;
        endcase
    end
    default:ALUControl=3'b000;
    endcase
end
endmodule