tigrou

4 ms·

1. 1.▲
   by tigrou 2y ago

   Thanks for your reply. I learned a lot. For people wondering why you need a lot of decoders with x86, this answer explain it well (see "Decode problem" part) : https://qr.ae/p2IEt9
2. 2.▲
   by tigrou 2y ago

   A regular branch predictor try to guess which way a branch (eg: if-else) will go before it's executed. That way, CPU can fetch and decode instructions in advance. Each side of the branch leads to the start of a new block of instruction
3. 3.▲
   by tigrou 2y ago

   Are you saying that branches can be used as a way of dividing code into several parts, so that several instruction decoders can be fed at the same time? Is it because the instruction decoder is actually one of the bottlenecks, not being ab