diff options
Diffstat (limited to 'testsuite/gna/perf02/wl_code_table.vhd')
-rw-r--r-- | testsuite/gna/perf02/wl_code_table.vhd | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/testsuite/gna/perf02/wl_code_table.vhd b/testsuite/gna/perf02/wl_code_table.vhd new file mode 100644 index 0000000..04842f9 --- /dev/null +++ b/testsuite/gna/perf02/wl_code_table.vhd @@ -0,0 +1,48 @@ +library ieee; +use ieee.std_logic_1164.all; + + +library ieee; +use ieee.numeric_std.all; + +entity wl_code_table is + port ( + clk : in std_logic; + ra0_data : out std_logic_vector(31 downto 0); + ra0_addr : in std_logic_vector(3 downto 0) + ); +end wl_code_table; +architecture augh of wl_code_table is + + -- Embedded RAM + + type ram_type is array (0 to 15) of std_logic_vector(31 downto 0); + signal ram : ram_type := ("11111111111111111111111111000100", "00000000000000000000101111100010", "00000000000000000000010010101110", "00000000000000000000001000011010", "00000000000000000000000101001110", "00000000000000000000000010101100", "00000000000000000000000000111010", "11111111111111111111111111100010", "00000000000000000000101111100010", "00000000000000000000010010101110", "00000000000000000000001000011010", "00000000000000000000000101001110", "00000000000000000000000010101100", "00000000000000000000000000111010", "11111111111111111111111111100010", "11111111111111111111111111000100"); + + + -- Little utility functions to make VHDL syntactically correct + -- with the syntax to_integer(unsigned(vector)) when 'vector' is a std_logic. + -- This happens when accessing arrays with <= 2 cells, for example. + + function to_integer(B: std_logic) return integer is + variable V: std_logic_vector(0 to 0); + begin + V(0) := B; + return to_integer(unsigned(V)); + end; + + function to_integer(V: std_logic_vector) return integer is + begin + return to_integer(unsigned(V)); + end; + +begin + + -- The component is a ROM. + -- There is no Write side. + + -- The Read side (the outputs) + + ra0_data <= ram( to_integer(ra0_addr) ); + +end architecture; |