Hi @oowekyala

love your cheat sheet. I think you've run into a tiny mixup with the LDM/STM modes:

• IA will start at reg
• IB will start at reg + 4

Otherwise, stmfd sp!,{lr} would be overwriting the link register on the stack; it isn't, because stmfd increments before storing.

Could you please fix that?

Best regards,

ichrispa

It's been a while since I studied ARM so I don't really know if this is important and needs fixing

While looking up the spec to check for #1, I came across the fact that the synonyms between access modes depend on the instruction... For example, the doc for STM says that FD is a synonym of DB, and the doc for LDM says that FD is a synonym for IA. Here are the summed up equivalence classes:

The descriptions look identical though.

The version that's currently in the sheet is the second column apparently.