我编了这段程序
......
process(ce,clk)
begin
if ce='0'then
if clk'event and clk='0' then
q(0)<=datain;
for i in 1 to 31 loop
q(i)<=q(i-1);
end loop;
dataout<=q(31);
end if;
end if;
end process;
process(update)
begin
if update='0'then
stmp<=q;
end if;
end process;
......
出的错误是：if clk'event and clk='0' then 这行
Error:Unsupported feature error:Conditional Statement in this region for signal not supported
当我把上面的process改成
......
process(ce,clk)
begin
if clk'event and clk='0' then
if ce='0'then
q(0)<=datain;
......
以后，编译成功，可是我要做的是让芯片的ce功能先于clk的
我要怎样改呢？ | 
