I was pretty surprised to learn that “the x86 architectures have a direction flag that can be set to cause the processor to run backwards”. It turns out not to

I was pretty surprised to learn that “the x86 architectures have a direction flag that can be set to cause the processor to run backwards”. It turns out not to be quite as dramatic as that description makes it sound: https://en.wikipedia.org/wiki/Direction_flag https://en.wikipedia.org/wiki/Direction_flag