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module pipelined_flow
#(parameter STAGES=0)
(
input logic clk,
rst_n,
input logic start,
output logic done
);
logic valid[STAGES];
assign done = valid[STAGES - 1];
always_ff @(posedge clk or negedge rst_n)
valid[0] <= !rst_n ? 0 : start;
genvar i;
generate
for (i = 1; i < STAGES; ++i) begin: pipeline
always_ff @(posedge clk or negedge rst_n)
valid[i] <= !rst_n ? 0 : valid[i - 1];
end
endgenerate
endmodule
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