blob: 1d99bd0fc7907a82cb5efec1e4e141869cb38b81 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
library ieee;
use ieee.std_logic_1164.all;
entity repro is
port (a : std_logic_vector (3 downto 0);
o : out std_logic_vector (3 downto 0));
end;
architecture behav of repro is
function cancel (a : std_logic_vector) return std_logic_vector
is
variable en : boolean := false;
variable res : std_logic_vector (a'range);
begin
if a'length = 0 then
en := true;
end if;
res := a;
if en then
res (7) := '0';
end if;
return res;
end cancel;
begin
o <= cancel (a);
end behav;
|
