first commit

rtl/common/multiplexer.sv

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+module multiplexer #(
+	parameter WIDTH = 32,
+	parameter CHANNELS = 2
+) (
+	input  logic [$clog2(CHANNELS)-1:0] sel,
+	input  logic [(CHANNELS*WIDTH)-1:0] in_bus,
+	output logic            [WIDTH-1:0] out
+);
+
+	genvar ig;
+	
+	logic [WIDTH-1:0] in_array [CHANNELS];
+	assign out = in_array[sel];
+	
+	for(ig = 0; ig < CHANNELS; ig = ig + 1) begin
+		assign in_array[(CHANNELS - 1) - ig] = in_bus[ig * WIDTH +: WIDTH];
+	end
+
+endmodule