Going to record a video about how function calls work under the hood at the machine code level. Is there anything in particular you'd like me to include?
If it's not out of scope, return-address prediction using a HW return-address stack in architectures with link register (like RISC-V, PowerPC, MIPS, ARM, SPARC). Not considering this can lead to code that performs okay on low-end CPUs but has horrible perf on high-end cores.
-
-
Considering https://twitter.com/TartanLlama/status/1285907080872890368 … it's probably safe to say that it's out of scope.
So for everyone reading along here: The HW maintains a return addr stack (RAS) internally. Certain insns push/pop. That RAS should be kept synced to call stack for good perf. On RISC-V:pic.twitter.com/FrXc52kGaZ
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.