1 files changed, 19 insertions, 0 deletions
diff --git a/testsuite/synth/oper01/uns01.vhdl b/testsuite/synth/oper01/uns01.vhdl
new file mode 100644
index 000000000..df75755ca
--- /dev/null
+++ b/testsuite/synth/oper01/uns01.vhdl
@@ -0,0 +1,19 @@
+entity uns01 is
+  port (ok : out boolean);
+end uns01;
+
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+architecture behav of uns01 is
+  --  add uns uns
+  constant a : unsigned (7 downto 0) := x"1e";
+  constant b : unsigned (3 downto 0) := x"2";
+  constant r1 : unsigned (7 downto 0) := a - b;
+  signal er1 : unsigned (7 downto 0);
+begin
+  er1 <= x"1c";
+--  ok <= r1 = x"20";
+  ok <= r1 = er1;
+end behav;