C/C++ Library for Evaluate ASM Codes

[chants]

If you are willing to do a bit of coding, ASMJit is a good choice. It's much powerful in capabilities than your needs, but flexible and let's you do anything including execute dynamically. It has an assembly parser called asmtk or the like. It's probably 30 lines of code to do everything you asked for that simple snippet. How inputs and outputs are dealt with would be the only tricky part...both parsing and binding it, but it's feasible