Xcode Debugger - how to single step at level of CPU instructions

Question

This is definitely obsessive, but I am fascinated by how cleverly the compiler translates C code into machine instructions. Since I am a little fuzzy on some instructions, it

Answer 1

Ooops, didn't check closely enough - Step Into w/Option (Cmd-Opt-Shft-I = ⌘⌥⇧I)