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module shregmap_test(input i, clk, output [1:0] q);
reg head = 1'b0;
reg [3:0] shift1 = 4'b0000;
reg [3:0] shift2 = 4'b0000;
always @(posedge clk) begin
head <= i;
shift1 <= {shift1[2:0], head};
shift2 <= {shift2[2:0], head};
end
assign q = {shift2[3], shift1[3]};
endmodule
module $__SHREG_DFF_P_(input C, D, output Q);
parameter DEPTH = 1;
parameter [DEPTH-1:0] INIT = {DEPTH{1'b0}};
reg [DEPTH-1:0] r = INIT;
always @(posedge C)
r <= { r[DEPTH-2:0], D };
assign Q = r[DEPTH-1];
endmodule
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