Gabriele Svelto on Nostr: Instruction addresses, operands, dependencies are tracked as the CPU fetches and ...

Instruction addresses, operands, dependencies are tracked as the CPU fetches and executes a stream of instructions which might or might not have to be executed, depending on branch prediction. In the case of a misprediction the state of the "wrong" instructions needs to be discarded. Similarly instruction timing is not predictable anymore. Memory accesses can take anything from a few cycles to hundreds, and fetch their data through different structures both inside and outside of the core. 6/31