Analog Devices EE-128 DSP in C++ Calling Assembly Class Member Functions Application Note

About this manual

This application note addresses the challenges of writing C++ callable assembly code, specifically focusing on name mangling and accessing class instance information. It provides a scheme to preserve the simplicity of standard C calls within a C++ environment. The document details how the C++ compiler modifies function names to differentiate parameters and explains the mechanism of passing the 'this' pointer in assembly routines.

What's inside

• Name mangling
• Parameter passing
• Class instance access
• Assembly code implementation
• Memory layout
• Inheritance

Frequently asked questions

What is the primary reason for name mangling in C++?

The primary reason is so the compiler can differentiate between different member functions with the same name based on their parameters.

How is the 'this' pointer passed in a C++ member function?

The 'this' pointer is passed in the R4 register, while other parameters start in the R8 register.

Where is the return argument of a function placed?

The return argument of a function is always placed in the R0 register.