diff options
Diffstat (limited to 'testsuite/gna/perf02/decis_levl.vhd')
-rw-r--r-- | testsuite/gna/perf02/decis_levl.vhd | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/testsuite/gna/perf02/decis_levl.vhd b/testsuite/gna/perf02/decis_levl.vhd new file mode 100644 index 0000000..ab5da5d --- /dev/null +++ b/testsuite/gna/perf02/decis_levl.vhd @@ -0,0 +1,48 @@ +library ieee; +use ieee.std_logic_1164.all; + + +library ieee; +use ieee.numeric_std.all; + +entity decis_levl is + port ( + clk : in std_logic; + ra0_data : out std_logic_vector(31 downto 0); + ra0_addr : in std_logic_vector(4 downto 0) + ); +end decis_levl; +architecture augh of decis_levl is + + -- Embedded RAM + + type ram_type is array (0 to 31) of std_logic_vector(31 downto 0); + signal ram : ram_type := ("00000000000000000000000100011000", "00000000000000000000001001000000", "00000000000000000000001101110000", "00000000000000000000010010110000", "00000000000000000000010111110000", "00000000000000000000011101001000", "00000000000000000000100010100000", "00000000000000000000101000011000", "00000000000000000000101110010000", "00000000000000000000110100110000", "00000000000000000000111011001000", "00000000000000000001000010010000", "00000000000000000001001001011000", "00000000000000000001010001010000", "00000000000000000001011001010000", "00000000000000000001100010010000", "00000000000000000001101011010000", "00000000000000000001110101100000", "00000000000000000001111111111000", "00000000000000000010001100001000", "00000000000000000010011000011000", "00000000000000000010100111011000", "00000000000000000010110110010000", "00000000000000000011001001100000", "00000000000000000011011100101000", "00000000000000000011110111100000", "00000000000000000100010010011000", "00000000000000000100111111101000", "00000000000000000101101100111000", "00000000000000000111111111111111", "00000000000000000000000000000000", "00000000000000000000000000000000"); + + + -- 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; |