SV vs SVH

When to Use .sv vs. .svh

• Use .sv for functional code that defines modules, interfaces, or testbenches.
• Use .svh for reusable definitions or configuration that multiple .sv files will include.

Practical Considerations

• Avoid cyclic dependencies: Be cautious when including .svh files to prevent circular inclusions.

• Organize headers logically: Keep macros and global parameters in .svh files for consistency and maintainability.

• Simulator behavior: Some simulators might not distinguish between .sv and .svh, but following the convention makes your project more maintainable and readable.

• you must explicitly include .svh files using the include directive, even if they are in the same directory as the.svfile. The SystemVerilog compiler does not automatically process.svhfiles unless they are explicitly included. This is because.svhfiles are considered header files, and they are not standalone compilable units like.sv files.