He doesn't define a model. He just discusses the gap between c's model and a few details of a modern CPU and talks about a few other models. In your opinion, w

He doesn't define a model. He just discusses the gap between c's model and a few details of a modern CPU and talks about a few other models. In your opinion, why was speculative execution added? It doesn't seem off base to suggest it was to enable programmers to continue writing single threaded applications while increasing execution speed. In your opinion, what is wrong with the statement that modern processors are trying to emulate an abstract machine like PDP-11? To me it seems largely right.