Bradley Lucier wrote:

What about "significant loss of accuracy" as these options probably won't cause a nuclear reactor meltdown ;)

Well, I did some googling, and the technical term I was thinking of was "catastrophic cancellation". So how about

Note that some mathematical routines in such libraries could suffer significant loss of accuracy, typically through so-called "catastrophic cancellation", when this option is used to set the precision to less than extended precision.

I think this is OK. So if nobody objects, this patch is OK for mainline.

Thanks,
Uros.

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