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// DESCRIPTION: Verilator: Verilog Test module
// This file ONLY is placed into the Public Domain, for any use,
// without warranty, 2020 by Yutetsu TAKATSUKASA.
// SPDX-License-Identifier: CC0-1.0
`ifdef PROCESS_TOP
`define CHECK if (out0 != (in0 ^ in1) || out1 != (in0 | in1) || out2 != (in0 & in1)) begin \
$display("Mismatch in0:%b in1:%b out0:%b out1:%b out2:%b", in0, in1, out0, out1, out2); \
$stop; \
end
module t (/*AUTOARG*/
// Inputs
clk
);
input clk;
logic in0, in1;
logic out0, out1, out2;
logic [31:0] count = 0;
// actually XOR and OR and AND
secret i_secret(.in0(in0), .in1(in1), .out0(out0), .out1(out1), .out2(out2));
always @(posedge clk) begin
count <= count + 32'd1;
if (count == 32'd1) begin
in0 <= 1'b0;
in1 <= 1'b0;
end else if (count == 32'd2) begin
`CHECK
in0 <= 1'b1;
in1 <= 1'b0;
end else if (count == 32'd3) begin
`CHECK
in0 <= 1'b0;
in1 <= 1'b1;
end else if (count == 32'd4) begin
`CHECK
in0 <= 1'b1;
in1 <= 1'b1;
end else if (count == 32'd5) begin
`CHECK
$write("*-* All Finished *-*\n");
$finish;
end
end
endmodule
`else
module secret(input in0, input in1, output out0, output out1, output out2);
assign out0 = in0 ^ in1;
assign out1 = in0 | in1;
assign out2 = in0 & in1;
endmodule
`endif
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