In this chapter, we have very briefly covered the numerous abilities of the macro instructions in Assembly language programming. Unfortunately, it may require an entire book to mention everything that may be done with macro instructions, especially when it comes to the Flat Assembler, which has an exceptional preprocessor.

An example from my own practice: I once had to implement a heavily obfuscated version of the AES128 decryption algorithm, which took 2175 lines in total, having only a few procedures, and almost half of that (1064 lines) was occupied by the definition of different macro instructions. As you may safely assume, about 30% to 60% of each procedure contained the invocation thereof.

In the next chapter, we will continue to dive deeper into the preprocessor and deal with different data structures, and the creation and management thereof.