1 files changed, 55 insertions, 0 deletions
diff --git a/testsuite/gna/issue2097/tb_fixed.vhdl b/testsuite/gna/issue2097/tb_fixed.vhdl
new file mode 100644
index 000000000..658026dae
--- /dev/null
+++ b/testsuite/gna/issue2097/tb_fixed.vhdl
@@ -0,0 +1,55 @@
+library IEEE;
+context IEEE.IEEE_std_context;
+
+package my_fixed_pkg is new IEEE.fixed_generic_pkg;
+
+--!
+
+library IEEE;
+context IEEE.IEEE_std_context;
+
+library work;
+use work.my_fixed_pkg.all;
+
+entity tb_fixed is
+end;
+
+architecture arch of tb_fixed is
+
+begin
+
+  process
+    constant ref    : real := -9.96484375;
+
+    subtype stype is sfixed(7 downto -8);
+
+    -- Subtype not allowed as size_res argument of to_sfixed:
+    -- constant input  : std_logic_vector (stype'length-1 downto 0) := to_slv(to_sfixed(ref, stype));
+    -- Therefore, a variable needs to be created:
+    variable fmt : stype;
+    constant input  : std_logic_vector (stype'length-1 downto 0) := to_slv(to_sfixed(ref, fmt));
+
+    variable sfmt : fmt'subtype;
+
+    procedure report_sfixed(arg: sfixed) is begin report to_string(to_real(arg)); end procedure;
+
+  begin
+    report_sfixed(stype(input));
+    report_sfixed(stype(signed(input)));
+
+    -- CRASH
+    report_sfixed(fmt'subtype(input));
+    -- CRASH
+    report_sfixed(fmt'subtype(signed(input)));
+
+    -- CRASH
+    report to_string(fmt'subtype);
+
+    -- However, sfmt, which is declared using fmt'subtype, does work
+    sfmt := stype(input);
+    report_sfixed(sfmt);
+
+    wait;
+  end process;
+
+end;