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// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed into the Public Domain, for any use,
// Author: Yu-Sheng Lin johnjohnlys@media.ee.ntu.edu.tw
// SPDX-License-Identifier: CC0-1.0
module t (/*AUTOARG*/
// Outputs
state,
// Inputs
clk
);
input clk;
int cyc;
reg rstn;
output [4:0] state;
parameter real fst_gparam_real = 1.23;
localparam real fst_lparam_real = 4.56;
real fst_real = 1.23;
integer fst_integer;
bit fst_bit;
logic fst_logic;
int fst_int;
shortint fst_shortint;
longint fst_longint;
byte fst_byte;
parameter fst_parameter = 123;
localparam fst_lparam = 456;
supply0 fst_supply0;
supply1 fst_supply1;
tri0 fst_tri0;
tri1 fst_tri1;
tri fst_tri;
wire fst_wire;
Test test (/*AUTOINST*/
// Outputs
.state (state[4:0]),
// Inputs
.clk (clk),
.rstn (rstn));
// Test loop
always @ (posedge clk) begin
cyc <= cyc + 1;
if (cyc==0) begin
// Setup
rstn <= ~'1;
end
else if (cyc<10) begin
rstn <= ~'1;
end
else if (cyc<90) begin
rstn <= ~'0;
end
else if (cyc==99) begin
$write("*-* All Finished *-*\n");
$finish;
end
end
endmodule
module Test (
input clk,
input rstn,
output logic [4:0] state
);
logic [4:0] state_w;
logic [4:0] state_array [3];
assign state = state_array[0];
always_comb begin
state_w[4] = state_array[2][0];
state_w[3] = state_array[2][4];
state_w[2] = state_array[2][3] ^ state_array[2][0];
state_w[1] = state_array[2][2];
state_w[0] = state_array[2][1];
end
always_ff @(posedge clk or negedge rstn) begin
if (!rstn) begin
for (int i = 0; i < 3; i++)
state_array[i] <= 'b1;
end
else begin
for (int i = 0; i < 2; i++)
state_array[i] <= state_array[i+1];
state_array[2] <= state_w;
end
end
endmodule
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