CLOCK_BUFFER_TYPE VHDL example - 2023.1 English

entity test is port(
in1 : std_logic_vector (8 downto 0);
clk : std_logic;
out1 : std_logic_vector(8 downto 0));
attribute clock_buffer_type : string;
attribute clock_buffer_type of clk: signal is "BUFR";
end test;