Experiment with OTHERS logic

Makes sign extension idiom work in my code base
Test case added, doesn't break any others
Please test on your code!

1 files changed, 17 insertions, 0 deletions

diff --git a/examples/signextend.vhd b/examples/signextend.vhd
new file mode 100644
index 0000000..2f8d9ee
--- /dev/null
+++ b/examples/signextend.vhd
@@ -0,0 +1,17 @@
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+use IEEE.STD_LOGIC_UNSIGNED.ALL;
+
+entity signextend is
+    port(
+        i : in std_logic_vector(15 downto 0);
+        o : out std_logic_vector(31 downto 0)
+    );
+end entity signextend;
+
+architecture behavior of signextend is
+begin
+    o(31 downto 24) <= (others => '0');
+    o(23 downto 16) <= (others => i(15));
+    o(15 downto 0) <= i;
+end architecture behavior;