define在sv中的应用

最新推荐文章于 2025-06-02 23:08:45 发布

原创最新推荐文章于 2025-06-02 23:08:45 发布 · 2.9k 阅读

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#macros #nested #input

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本文探讨了如何通过Verilog中的宏定义为变量名添加前缀或后缀的方法。作者首先介绍了如何定义宏来添加后缀，并进一步讨论了如何通过嵌套宏的方式实现前缀的添加。该技巧对于希望在代码中标准化覆盖点命名方式的设计者非常有用。

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1. 介绍

From reading these it might be apparent that define macro can be used for adding a postfix to the variable, but not prefix. I was thinking the same after reading the description (they don't have a single example of adding prefix to the variable via `define. Confused ?? Let me explain by giving a concrete example view sourceprint? // Example macro for a coverage class // Aim : want to get ABC_cp : coverpoint ABC {bins b = {1}; } // by calling `COV(ABC) `define COV(__name) __name``_cp : coverpoint __name {bins b = {1}; } // Next // What to do if I want cp_ABC in place of ABC_cp as for the above example // NOTE : I can't use cp_``__name as cp_ is not an input to the macro // Solution // Use nested macros `define PREFIX(__prefix, __name) __prefix``__name `define COV2(__name) `PREFIX(cp_,__name) : coverpoint __name {bins b = {1}; }