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module reversed #(parameter WIDTH=32, SELW=4, CTRLW=$clog2(WIDTH), DINW=2**SELW)
(input clk,
input [CTRLW-1:0] ctrl,
input [DINW-1:0] din,
input [SELW-1:0] sel,
output reg [WIDTH-1:0] dout);
localparam SLICE = WIDTH/(SELW**2);
always @(posedge clk) begin
dout[(WIDTH-ctrl*sel)-:SLICE] <= din;
end
endmodule
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