Logical Shift Left by 1 (better way)

architecture better of lshift  is

begin

process (din, shift_en)

begin

      dout <= din;     -- default case

      if (shift_en = '1') then

           dout(0) <= '0';     -- shift a zero into LSB

           dout (7 downto 1) <= din(6 downto 0);

       end if;   

end process;

end better;

end lshift;

This illustrates the assignment of a segment of one bus to another bus segment. The bus ranges on each side of the assignment statement must be the name number of bits (each 6 bits in this case).

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