Functions

Functions in ASM2 assembly language are blocks of code designed to perform specific tasks, facilitating modular and structured programming. They provide a way to encapsulate code for specific operations, enhancing readability and reusability.

Naming Convention:

• CamelCase: Function names must use camelCase.

• No Initial Numbers: Cannot start with a number.

• Not Solely Numeric: Cannot be just a number.

• No Special Characters: Cannot contain special characters.

• No Underscores at Start/End: Cannot start or end with _.

General Structure:

assemblyCopy .functionName
    ; Context and description
    ; OPERANDS Setup: DESTINATION, SOURCE

    ; Function body (code performing the task)
    
    ; Return value (if any)
    
END

Example:

assemblyCopy .addNumbers
    ; Adds two numbers and returns the result
    ; Input: OPERANDS Setup: DESTINATION, SOURCE

    ADD DESTINATION, SOURCE
    
    RET
END

Key Points:

• Modularity: Encapsulates specific tasks, making the code modular.

• Reuse: Allows code to be reused throughout the program.

• Clarity: Provides clear structure for specific operations.

• END Instruction: Marks the end of the function, returning control to the calling code.