I don't know of any CPU that speculates both sides of a branch. I work on a CPU design team.
Modern CPUs speculate hundreds of instructions ahead, and with just a dozen branches you can have a few thousand different paths. It makes more sense to speculate down one path with very high accuracy.
Modern CPUs speculate hundreds of instructions ahead, and with just a dozen branches you can have a few thousand different paths. It makes more sense to speculate down one path with very high accuracy.