VHDL语言，谁能帮我解读下

Question

entity binbcd14 is
Port ( b : in STD_LOGIC_VECTOR (13 downto 0);
p : out STD_LOGIC_VECTOR (16 downto 0));
end binbcd14;

architecture Behavioral of binbcd14 is

begin
process(b)
variable z : std_logic_vector(32 downto 0);
begin
for i in 0 to 32 loop
z(i):='0';
end loop;
z(16 downto 3) := b;

for j in 0 to 10 loop
if(z(17 downto 14)>"0100") then
z(17 downto 14):= z(17 downto 14) + "0011";
end if;
if(z(21 downto 18)>"0100") then
z(21 downto 18):= z(21 downto 18) + "0011";
end if;
if(z(25 downto 22)>"0100") then
z(25 downto 22):= z(25 downto 22) + "0011";
end if;
if(z(29 downto 26)>"0100") then
z(29 downto 26):= z(29 downto 26) + "0011";
end if;
z(32 downto 1):=z(31 downto 0);
end loop;
p<=z(30 downto 14);
end process;

end Behavioral;

Answer 1

entity binbcd14 is --定义实体名
Port ( b : in STD_LOGIC_VECTOR (13 downto 0);--定义输入端口14位
p : out STD_LOGIC_VECTOR (16 downto 0));--定义输出端口17位
end binbcd14;

architecture Behavioral of binbcd14 is

begin
process(b) --进程语句
variable z : std_logic_vector(32 downto 0); 定义变量33位
begin
for i in 0 to 32 loop --给变量赋初值，其实不用这么麻烦，直接
z(i):='0'; z:=(others=>'0')；这句的结果就相当于你
end loop; for语句的功能
z(16 downto 3) := b; --z的第16到第3位赋值b

for j in 0 to 10 loop --不知道你这句for是要干什么的，就是要循环
加十一次0011吧
if(z(17 downto 14)>"0100") then
z(17 downto 14):= z(17 downto 14) + "0011";
end if;
if(z(21 downto 18)>"0100") then
z(21 downto 18):= z(21 downto 18) + "0011";
end if;
if(z(25 downto 22)>"0100") then
z(25 downto 22):= z(25 downto 22) + "0011";
end if;
if(z(29 downto 26)>"0100") then
z(29 downto 26):= z(29 downto 26) + "0011";
end if;
z(32 downto 1):=z(31 downto 0);--相当于右移一位
end loop;
p<=z(30 downto 14);--最后赋于p输出
end process;

end Behavioral;