Skip to main content

You are not logged in. Your edit will be placed in a queue until it is peer reviewed.

We welcome edits that make the post easier to understand and more valuable for readers. Because community members review edits, please try to make the post substantially better than how you found it, for example, by fixing grammar or adding additional resources and hyperlinks.

1
  • Just for the sake of accuracy, it's not so much that the PDP-11 had an instruction for pre- or post-incrementing, but had addressing modes for them (and decrementing), meaning that any instruction that accessed memory through a register could also be set to either pre- or post-increment or decrement that register at the same time. Compiler technology at the time really wasn't up to doing that automatically through optimization, so explicit support was the only way to get it to work. Commented Feb 22, 2018 at 16:01