方法2:进程内为顺序语句,最先描述优先级最低 最后描述优先级最高,可实现优先级编码。 library ieee use ieee std logic 1164.all entity priority is port(signal yo, yl, y2, y3, y4, y5, y6, y7: in std logic signal vec: out std logic vector(2 downto 0))i end priority氵 architecture behavior of priority is begin process(yo, yl, y2, y3, y4, y5,y6,y7) beqir if (yo=1)then vec<=000 end if if (yl=1)then vec<=001 end ifi if (y2=f1') then vec<=001 end if if(y3=1)then vec<=011; end ifi if (y4=1) then vec<=100 i end ifi if (y5=1)then vec<=101i end ifi if (y6=1)then vec<=110; end if if (y7=1)then vec<=11l i end ifi end process end behavior5 方法2：进程内为顺序语句，最先描述优先级最低， 最后描述优先级最高，可实现优先级编码