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library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity psl_test_cover2 is
end entity psl_test_cover2;
architecture test of psl_test_cover2 is
signal s_rst_n : std_logic := '0';
signal s_clk : std_logic := '0';
signal s_write : std_logic;
signal s_read : std_logic;
begin
s_rst_n <= '1' after 20 ns;
s_clk <= not s_clk after 10 ns;
TestP : process is
begin
report "RUNNING PSL_TEST_COVER test case";
report "================================";
s_write <= '0';
s_read <= '0';
wait until s_rst_n = '1' and rising_edge(s_clk);
s_write <= '1'; -- cover should hit
wait until rising_edge(s_clk);
s_read <= '1'; -- assertion should hit
wait until rising_edge(s_clk);
s_write <= '0';
s_read <= '0';
wait until rising_edge(s_clk);
s_write <= '1'; -- cover should hit
wait until rising_edge(s_clk);
s_read <= '1'; -- assertion should hit
wait until rising_edge(s_clk);
s_write <= '0';
s_read <= '0';
wait;
end process TestP;
-- psl statements
-- psl default clock is rising_edge(s_clk);
-- cover directive seems not supported (ignored by GHDL)
-- psl cover always (s_write -> not(s_read));
end architecture test;
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