From 6796aca2963dbdf9b48331ad46014bcf6382fb73 Mon Sep 17 00:00:00 2001
From: Tristan Gingold <tgingold@free.fr>
Date: Thu, 21 May 2020 18:10:20 +0200
Subject: testsuite/synth: add test for previous commit.

---
 testsuite/synth/sns01/tb_add03.vhdl | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/testsuite/synth/sns01/tb_add03.vhdl b/testsuite/synth/sns01/tb_add03.vhdl
index 7bc68ea8a..e856744a7 100644
--- a/testsuite/synth/sns01/tb_add03.vhdl
+++ b/testsuite/synth/sns01/tb_add03.vhdl
@@ -19,6 +19,14 @@ begin
     borrow <= '0';
     wait for 1 ns;
     assert res = b"00000_0011" severity failure;
+
+
+    a <= b"00000_0010";
+    b <= b"00000_0001";
+    borrow <= '1';
+    wait for 1 ns;
+    assert res = b"00000_0000" severity failure;
+
     wait;
   end process;
 end behav;
-- 
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