2 files changed, 93 insertions, 0 deletions
diff --git a/testsuite/gna/issue875/test.vhdl b/testsuite/gna/issue875/test.vhdl
new file mode 100644
index 000000000..bdbf63660
--- /dev/null
+++ b/testsuite/gna/issue875/test.vhdl
@@ -0,0 +1,84 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+use STD.textio.all;
+use ieee.std_logic_textio.all;
+
+entity example_file_io_tb is
+end example_file_io_tb;
+
+architecture behave of example_file_io_tb is
+
+	------------------------------------------------------------------------------
+	-- Declare the Component under Test
+	------------------------------------------------------------------------------
+	component module_ripple_carrier_adder is
+		generic (
+			g_WIDTH: natural);
+		port (
+			i_add_term1 : in  std_logic_vector(g_WIDTH-1 downto 0);
+			i_add_term2 : in  std_logic_vector(g_WIDTH-1 downto 0);
+			o_result	: out std_logic_vector(g_WIDTH downto 0);
+			);
+	end component module_ripple_carrier_adder;
+
+	------------------------------------------------------------------------------
+	-- Testbench Internal Signals
+	------------------------------------------------------------------------------
+	file file_VECTOR : text;
+	file file_RESULT: text;
+
+	constant c_WIDTH : natural := 4;
+
+	signal r_ADD_TERM1 : std_logic_vector(c_WIDTH-1 downto 0) := (others => '0');
+	signal r_ADD_TERM2 : std_logic_vector(c_WIDTH-1 downto 0) := (others => '0');
+	signal w_SUM 	   : std_logic_vector(c_WIDTH downto 0);
+
+begin
+	------------------------------------------------------------------------------
+	-- Instantiate and Map UUT
+	------------------------------------------------------------------------------
+	MODULE_RIPPLE_CARRY_ADDER_INST : module_ripple_carry_adder
+		generic map (
+			g_WIDTH => c_WIDTH)
+		port map (
+			i_addr_term1 => r_ADD_TERM1,
+			i_addr_term2 => r_ADD_TERM2,
+			o_result => w_SUM
+			);
+
+	------------------------------------------------------------------------------
+	-- This procedure reads the file input_vectors.txt which is located in the 
+	-- simulation project area. 
+	-- It will read the data in and send it to the ripple carry adder component
+	-- to perform the operations. The result is written to the
+	-- output_results.txt file, located in the same directory.
+	------------------------------------------------------------------------------
+
+	begin
+		file_open(file_VECTORS, "input_vectors.txt", read_mode);
+		file_open(file_RESULTS, "output_results.txt", write_mode);
+		
+		while not endfile(file_VECTORS) loop
+			readline(file_VECTORS, v_ILINE);
+			read(v_ILINE, v_ADD_TERM1);
+			read(v_ILINE, v_SPACE);
+			read(v_ILINE, V_ADD_TERM2);
+			
+			-- Pass the variable to a signal to allow the ripple-carry to use it
+			r_ADD_TERM1 <= v_ADD_TERM1;
+			r_ADD_TERM2 <= v_ADD_TERM2;
+
+			wait for 60 ns;
+			
+			write(v_OLINE, w_SUM, right, c_WIDTH);
+			writeline(file_RESULTS, v_OLINE);
+		end loop;
+
+		file_close(file_VECTORS);
+		file_close(file_RESULTS);
+
+		wait;
+	end process;
+
+end behave;
diff --git a/testsuite/gna/issue875/testsuite.sh b/testsuite/gna/issue875/testsuite.sh
new file mode 100755
index 000000000..8e20eb85f
--- /dev/null
+++ b/testsuite/gna/issue875/testsuite.sh
@@ -0,0 +1,9 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+analyze_failure test.vhdl
+
+clean
+
+echo "Test successful"