From 2f4337f027ec97dd93642ea2db70873e9192fb3b Mon Sep 17 00:00:00 2001
From: Tristan Gingold
Date: Sun, 7 Dec 2014 11:40:58 +0100
Subject: Add perf02 (performance issue).

---
 testsuite/gna/perf02/add_153.vhd | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 testsuite/gna/perf02/add_153.vhd

(limited to 'testsuite/gna/perf02/add_153.vhd')

diff --git a/testsuite/gna/perf02/add_153.vhd b/testsuite/gna/perf02/add_153.vhd
new file mode 100644
index 0000000..85fb68a
--- /dev/null
+++ b/testsuite/gna/perf02/add_153.vhd
@@ -0,0 +1,33 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+library ieee;
+use ieee.numeric_std.all;
+
+entity add_153 is
+	port (
+		output : out std_logic_vector(63 downto 0);
+		in_a : in  std_logic_vector(63 downto 0);
+		in_b : in  std_logic_vector(63 downto 0)
+	);
+end add_153;
+
+architecture augh of add_153 is
+
+	signal carry_inA : std_logic_vector(65 downto 0);
+	signal carry_inB : std_logic_vector(65 downto 0);
+	signal carry_res : std_logic_vector(65 downto 0);
+
+begin
+
+	-- To handle the CI input, the operation is '1' + CI
+	-- If CI is not present, the operation is '1' + '0'
+	carry_inA <= '0' & in_a & '1';
+	carry_inB <= '0' & in_b & '0';
+	-- Compute the result
+	carry_res <= std_logic_vector(unsigned(carry_inA) + unsigned(carry_inB));
+
+	-- Set the outputs
+	output <= carry_res(64 downto 1);
+
+end architecture;
-- 
cgit