The article said that it's not the generation and write back of the overflow bits that are the problem, this is basically free, it's the shared state that a sta

The article said that it's not the generation and write back of the overflow bits that are the problem, this is basically free, it's the shared state that a status register represents that is the problem. Every single arithmetical/logical operation writes to it, out-of-order execution is already headache-inducing as it is without an implicit argument to most instructions.