testsuite/synth: add test from #1082 (#1085)

2 files changed, 27 insertions, 0 deletions

diff --git a/testsuite/synth/issue1082/ent.vhdl b/testsuite/synth/issue1082/ent.vhdl
new file mode 100644
index 000000000..7765e6a70
--- /dev/null
+++ b/testsuite/synth/issue1082/ent.vhdl
@@ -0,0 +1,18 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+entity test is
+  port(
+    a_in  : in std_logic_vector(31 downto 0);
+    b_out : out std_logic_vector(31 downto 0)
+  );
+end test;
+
+architecture rtl of test is
+begin
+  process(all)
+  begin
+    b_out <= std_logic_vector(to_unsigned((31-to_integer(unsigned(a_in))) / 4, 32));
+  end process;
+end;
\ No newline at end of file
diff --git a/testsuite/synth/issue1082/testsuite.sh b/testsuite/synth/issue1082/testsuite.sh
new file mode 100755
index 000000000..26a25c13f
--- /dev/null
+++ b/testsuite/synth/issue1082/testsuite.sh
@@ -0,0 +1,9 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+GHDL_STD_FLAGS=--std=08
+
+synth ent.vhdl -e
+
+echo "Test successful"