@(posedge Clk) 之间的区别；a<=1'b1;和@(posedge Clk) a&lt;= 1'b1; [英] Difference between @(posedge Clk); a&lt;= 1&#39;b1; and @(posedge Clk) a&lt;= 1&#39;b1;

问题描述

有什么区别吗

@(posedge Clk);
   a<= 1'b1;

和

@(posedge Clk)
   a<= 1'b1;

注意 Clk 后面的分号.我在浏览测试平台时遇到了类似的代码行.我做了一些简单的实验，在模拟过程中我找不到任何差异.由于分号的存在/不存在，这些行后面的代码的执行顺序是否会发生任何变化?

Note the semicolon after Clk. I came across similar lines of code when I was browsing through a testbench. I did some simple experiments and I could not find any differences during simulation. Will the sequence of execution for the code following these lines change in any way due to the presence/absence of the semicolon?

推荐答案

你说得对 - 没有行为差异.

You're correct -there's no behavioural difference.

分号版本是:等等.做这个.非分号版本是:等待然后执行此操作.您有时会在单行中看到这种形式:

The semicolon version is: Wait. Do this. The non-semicolon version is: Wait then do this. You'll sometimes see this form used in one-liners:

@(posedge Clk) a<= 1'b1;

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