我也是初学者，不知道什么是功能库和ip核。也不知道megawizard plug-in manager,我这里有一个使用lpm库中乘法器的模块的例子，不知道有没有用处。wind－rain大侠帮了我，我也贡献自己的一分力量吧。
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
library lpm;
use lpm.lpm_components.all
use work.all;
entity mult8x8 is
port(
dataa,datab: in std_logic_vector(7 downto 0);
clk: in std_logic;
multclr: in std_logic;
datap: out std_logic_vector(15 downto 0);
);
end mult8x8;
architecture lpm of mult8x8 is
begin
epstein:??component lpm_mult
generic map(lpm_widtha=>8,
lpm_widthb=>8,
lpm_widthp=>8,
lpm_widths=>8,
lpm_representation=>signed,
lpm_pipeline=>3
)
port map(dataa => dataa;
datab => datab;
clk => clock;
multclr => aclr;
datap => result;
);
end lpm;
