diff options
Diffstat (limited to 'testsuite/synth/memmux01/memmux01.vhdl')
-rw-r--r-- | testsuite/synth/memmux01/memmux01.vhdl | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/testsuite/synth/memmux01/memmux01.vhdl b/testsuite/synth/memmux01/memmux01.vhdl new file mode 100644 index 000000000..27d0169e9 --- /dev/null +++ b/testsuite/synth/memmux01/memmux01.vhdl @@ -0,0 +1,35 @@ +library ieee; +use ieee.std_logic_1164.all; +use ieee.numeric_std.all; + +entity memmux01 is + port ( + wen : std_logic; + addr : std_logic_vector (3 downto 0); + wdat : std_logic; + rdat : out std_logic_vector (15 downto 0); + clk : std_logic; + rst : std_logic); +end memmux01; + +architecture rtl of memmux01 is +begin + process (clk) + is + variable mem : std_logic_vector (15 downto 0); + variable ad : natural range 0 to 15; + begin + if rising_edge(clk) then + rdat <= mem; + + if rst = '1' then + mem := (others => '0'); + else + ad := to_integer(unsigned(addr)); + if wen = '1' then + mem (ad) := wdat; + end if; + end if; + end if; + end process; +end rtl; |