iverilog/ivtest/ivltests/automatic_task.v

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module automatic_task();
task automatic fill_array;
input [7:0] value;
reg [7:0] array[3:0];
event step;
fork
begin
#10 array[0] = value; ->step;
#10 array[1] = array[0]; ->step;
#10 array[2] = array[1]; ->step;
#10 array[3] = array[2]; ->step;
end
begin
@step $display(array[0], array[1], array[2], array[3]);
@step $display(array[0], array[1], array[2], array[3]);
@step $display(array[0], array[1], array[2], array[3]);
@step $display(array[0], array[1], array[2], array[3]);
end
join
endtask
initial #1 fill_array(1);
initial #2 fill_array(2);
endmodule