module asu #(parameter width = 2)(
	input logic [0:0] op,
	input logic[2**width-1:0] A, input logic[2**width-1:0] B,
   output logic[2**width-1:0] OUT_1, output logic[0:0] COUT, output logic[0:0] OUT_CIN);

    logic [2**width-1:0] operand;
    always_comb begin
        // A + (sub) ? B : -B
        // Adds an extra bit to all operands to calculate the carry bit. Not optimal for hardware synthesis
        operand = (B ^ {(2**width){op}});
        {COUT, OUT_1} = A + operand + {{(2**width-1){1'b0}}, op};
    end

    // Need to do this outside of the always_comb block because parameter-based bitslicing/indexing isn't supported?
    // Cin for final bit in adder to later be xor'ed with COUT to determine if a signed overflow occured for the MIPS architecture
    assign OUT_CIN = A[2**width-1] ^ operand[2**width-1] ^ OUT_1[2**width-1];
endmodule