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Are you talking about x87?

That's ancient history. Compilers don't use that instruction set any more in normal operation.

GCC, Java, LLVM, etc, will normally emit SSE2 in order to be standards compliant. They will only relax this if you tell them to, then it's your problem.

Yes, I was explicitly talking about the x87, and did mention that it has stopped being relevant for at least 10 years.

I believe there is still quite a bit of cautionary discussion of floating point numbers that was written in the age of the x87, so it's important to understand that people were not just misunderstanding IEEE754, even though their concerns are no longer applicable to modern hardware.

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