[swift-evolution] Include sqrt and remainder into FloatingPoint protocol as built in functions as required by IEEE754

[Xiaodi Wu]

As mentioned in the other thread, these are already accepted for inclusion
as part of SE-0067.
On Fri, Jul 1, 2016 at 10:35 Björn Forster <swift-evolution at swift.org>
wrote:

> The IEEE754 standard requires a standard conform floating point
> implementation besides add,mul,sub,div and rounding functions and lots of
> other things also to provide sqrt and remainder as builtin function.
> Shouldn't be sqrt and remainder (or mod) also be added to the FloatingPoint
> protocol now that also the rounding functions might be added with SE-0113:
> Add integral rounding functions to FloatingPoint
> <https://github.com/apple/swift-evolution/blob/master/proposals/0113-rounding-functions-on-floatingpoint.md>
> ?
>
> Kind Regards,
> Björn
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