Re:CPU branch prediction evolution over years
by justsomehnguy on Sunday January 01, 2023 @07:13AM
(#34205716)
Yes, it would be quite strange not to add it at all, especially since it was available since Pentium days.
No, it is not comparable with a 'proper' CPUs because it was still gutted hard.
IMMSMV all that stuff consumes a lot of die space, so it makes sense to throw it out if the performance is enough.
In-order execution does not mean that there is no branch prediction, it just means that the number of instructions speculated is much smaller.