是否可以定义一个私人＆＃39;架构中的实体和架构？

Question

我有一个alu模块alu_div_pipelined，它实例化另一个模块（移植阶段）。此模块（实体+体系结构）在同一文件中声明。

entity declaration of div_pipelined
entity declaration of pipe stage
architecture of div_pipelined
architecture of pipe stage

是否可以在架构区域内声明私有模块？

管道阶段模块没有可见性要求。

示例：

entity alu_div_pipelined is
  generic (...);
  port (...);
end entity;

architecture rtl of alu_div_pipelined is
  ...

  entity pipe_stage is
    generic (...);
    port (...);
  end entity;

  architecture rtl of pipe_stage is
  ...
  end architecture;
begin

  gen : for i in 0 to 7 generate
    ...
  begin
    stage : entity work.pipe_stage
      generic map (...)
      port map (...);
  end generate;
end architecture;