zlacker

You don't necessarily need `-ffast-math` if you are willing to tweak your code a bit, since you can just introduce accumulators by yourself. Such optimizer-friendly code is not hard to write if you know basic principles.

>>lifthr+(OP)
That's what I'm saying though. Either youbdo the accumulators yourself, or you need a compiler escape hatch.

>>mratsi+Pm
I mean, you don't need SIMD to put accumulators.

>>lifthr+1q
The compiler escape hatch is -ffast-math