HDLBits——Replication operator位扩展（非常有用的一道题目）

最新推荐文章于 2024-05-05 10:00:29 发布

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最新推荐文章于 2024-05-05 10:00:29 发布 · 1.8k 阅读

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#fpga #verilog #嵌入式 #电脑硬件

本文深入探讨了在Verilog编程中实现位扩展的方法，特别是如何将一个8位数位扩展到32位，同时保持其符号值不变。通过具体实例和代码解析，展示了正确的位扩展实现方式，并对比了常见的错误做法。

本人持续更新HDLBits其他题目，详细讲解我们使用Verilog编程时会遇到的各种错误，若有兴趣可以移步我的博客中心浏览本人的其他文章，感谢赏光！

A Bit of Practice
One common place to see a replication operator is when sign-extending a smaller number to a larger one, while preserving its signed value. This is done by replicating the sign bit (the most significant bit) of the smaller number to the left. For example, sign-extending 4’b0101 (5) to 8 bits results in 8’b00000101 (5), while sign-extending 4’b1101 (-3) to 8 bits results in 8’b11111101 (-3).

Build a circuit that sign-extends an 8-bit number to 32 bits. This requires a concatenation of 24 copies of the sign bit (i.e., replicate bit[7] 24 times) followed by the 8-bit number itself.

本道题目的意思就是扩展位
正确解答