first commit

rtl/common/multiplexer4.sv

@@ -0,0 +1,18 @@
+module multiplexer4 #(
+	parameter WIDTH = 32
+) (
+	input  logic       [1:0] sel,
+	input  logic [WIDTH-1:0] in0,
+	input  logic [WIDTH-1:0] in1,
+	input  logic [WIDTH-1:0] in2,
+	input  logic [WIDTH-1:0] in3,
+	output logic [WIDTH-1:0] out
+);
+
+	multiplexer #(.WIDTH(WIDTH), .CHANNELS(4)) multiplexer_inst (
+		.sel(sel),
+		.in_bus({in0, in1, in2, in3}),
+		.out(out)
+	);
+	
+endmodule