aboutsummaryrefslogtreecommitdiffstats
path: root/testsuite/gna/issue50/idct.d/add_483.vhd
diff options
context:
space:
mode:
authorTristan Gingold <tgingold@free.fr>2016-04-02 07:40:37 +0200
committerTristan Gingold <tgingold@free.fr>2016-04-02 07:40:37 +0200
commit66e31d6d8c4faab0aeadee87298f13a3b67adbfb (patch)
treeaf863500c6e1ddf22321538a6c51247fccd57704 /testsuite/gna/issue50/idct.d/add_483.vhd
parent122fa90fb7e5c15b58efa100da828c1e879b4e4e (diff)
downloadghdl-66e31d6d8c4faab0aeadee87298f13a3b67adbfb.tar.gz
ghdl-66e31d6d8c4faab0aeadee87298f13a3b67adbfb.tar.bz2
ghdl-66e31d6d8c4faab0aeadee87298f13a3b67adbfb.zip
Add testcase for issue50.
Diffstat (limited to 'testsuite/gna/issue50/idct.d/add_483.vhd')
-rw-r--r--testsuite/gna/issue50/idct.d/add_483.vhd33
1 files changed, 33 insertions, 0 deletions
diff --git a/testsuite/gna/issue50/idct.d/add_483.vhd b/testsuite/gna/issue50/idct.d/add_483.vhd
new file mode 100644
index 000000000..92b5fde0e
--- /dev/null
+++ b/testsuite/gna/issue50/idct.d/add_483.vhd
@@ -0,0 +1,33 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+library ieee;
+use ieee.numeric_std.all;
+
+entity add_483 is
+ port (
+ result : out std_logic_vector(31 downto 0);
+ in_a : in std_logic_vector(31 downto 0);
+ in_b : in std_logic_vector(31 downto 0)
+ );
+end add_483;
+
+architecture augh of add_483 is
+
+ signal carry_inA : std_logic_vector(33 downto 0);
+ signal carry_inB : std_logic_vector(33 downto 0);
+ signal carry_res : std_logic_vector(33 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
+ result <= carry_res(32 downto 1);
+
+end architecture;