Task and Function in Verilog
Task:
A task in Verilog is used to write reusable logic that may include delays, events, and multiple input/output ports. Tasks can call other tasks or functions and are ideal for modeling control logic or operations involving time.
Function:
A function in Verilog is used for pure computations that return a single value. Functions execute in zero simulation time, cannot contain delays, and only accept input arguments.
Key Takeaway:
Use task when the logic involves delays, event control, or multiple outputs.
Use function for fast, pure computations with no timing impact.
Understanding this distinction is essential for writing scalable, maintainable, and simulation-friendly RTL code.
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