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author | Tristan Gingold <tgingold@free.fr> | 2021-03-14 18:19:28 +0100 |
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committer | Tristan Gingold <tgingold@free.fr> | 2021-03-14 18:19:28 +0100 |
commit | b1092b0a72fe66cf426e48e7c72806049767a0fc (patch) | |
tree | 2f2a786d871e70e265a40b9df6543238cc9e1adf /testsuite | |
parent | f16cb5d7ef37f5f66b79b1c10aedc46c2060b7cc (diff) | |
download | ghdl-b1092b0a72fe66cf426e48e7c72806049767a0fc.tar.gz ghdl-b1092b0a72fe66cf426e48e7c72806049767a0fc.tar.bz2 ghdl-b1092b0a72fe66cf426e48e7c72806049767a0fc.zip |
testsuite/synth: add test for #1685
Diffstat (limited to 'testsuite')
-rw-r--r-- | testsuite/synth/issue1685/test_case.vhdl | 36 | ||||
-rwxr-xr-x | testsuite/synth/issue1685/testsuite.sh | 7 |
2 files changed, 43 insertions, 0 deletions
diff --git a/testsuite/synth/issue1685/test_case.vhdl b/testsuite/synth/issue1685/test_case.vhdl new file mode 100644 index 000000000..e8517e8f1 --- /dev/null +++ b/testsuite/synth/issue1685/test_case.vhdl @@ -0,0 +1,36 @@ +library ieee; +use ieee.std_logic_1164.all; + +entity test_case is + generic( + stable_count_c : natural := 0; + data_width_c : integer := 4 + ); + port( + clock_i : in std_ulogic; + data_i : in std_ulogic_vector(data_width_c-1 downto 0); + data_o : out std_ulogic_vector(data_width_c-1 downto 0) + ); +end test_case; + +architecture rtl of test_case is + subtype word_t is std_ulogic_vector(data_width_c-1 downto 0); + signal cycles_to_go_s : natural range 0 to stable_count_c; + signal stable_d, last_val : word_t; +begin + clock: process (clock_i) + begin + if rising_edge(clock_i) then + last_val <= data_i; + if last_val /= data_i and stable_count_c /= 0 then + cycles_to_go_s <= stable_count_c - 1; + elsif cycles_to_go_s = 0 or stable_count_c = 0 then + stable_d <= data_i; + else + cycles_to_go_s <= cycles_to_go_s - 1; + end if; + end if; + end process clock; + + data_o <= stable_d; +end rtl; diff --git a/testsuite/synth/issue1685/testsuite.sh b/testsuite/synth/issue1685/testsuite.sh new file mode 100755 index 000000000..348b3b8d8 --- /dev/null +++ b/testsuite/synth/issue1685/testsuite.sh @@ -0,0 +1,7 @@ +#! /bin/sh + +. ../../testenv.sh + +synth_only test_case + +echo "Test successful" |