乘法器之第一階段

總算做好第一階段了，這次是延用老師給的例程式而修改出來的，雖然並不是全部都自己做的，但只修改一些局部的地方，就已經讓我受益良多，而一些指令還有些不清楚，有機會一定要去上網深入了解。
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局部的程式碼

always
begin
@(posedge sysclk) enter_new_state(`IDLE);
r1 <= @(posedge sysclk) x;
r2 <= @(posedge sysclk) y;
ready = 1;
if (pb)
begin
while (r2 > 1 pb)
begin
@(posedge sysclk) enter_new_state(`COMPUTE);
r1 <= @(posedge sysclk) r1 + x;
r2 <= @(posedge sysclk) r2 - 1;
r3 <= @(posedge sysclk) r1;
end
end
end