Optimize nonadjacent bank activation

module adjacent_bank_optimizer (
  input  logic        clk,
  input  logic        rst_n,
  input  logic        in_valid,
  input  logic        in_last,
  input  logic [7:0]  benefit,
  input  logic        result_ready,
  output logic        in_ready,
  output logic        result_valid,
  output logic [11:0] max_score,
  output logic [15:0] select_mask,
  output logic [4:0]  bank_count
);
  typedef enum logic [1:0] {S_INPUT, S_SEARCH, S_RESULT} state_t;
  state_t state_q;

  logic [7:0] benefit_q [0:15];
  logic [4:0] write_idx_q;
  logic [16:0] enum_q, limit_q;
  logic [11:0] best_score_q, result_score_q;
  logic [15:0] best_mask_q, result_mask_q;
  logic [4:0] best_count_q, result_count_q;

  logic cand_legal, cand_better, lower_index_preferred;
  logic [11:0] cand_score;
  logic [4:0] cand_count;
  logic first_difference;

  always_comb begin : evaluate_candidate
    // TODO: Implement evaluate_candidate using the supplied state and interface.
  end

  assign in_ready     = (state_q == S_INPUT);
  assign result_valid = (state_q == S_RESULT);
  assign max_score    = result_score_q;
  assign select_mask  = result_mask_q;
  assign bank_count   = result_count_q;

  always_ff @(posedge clk) begin : load_search_and_publish
    // TODO: Implement load_search_and_publish using the supplied state and interface.
  end
endmodule