[swift-evolution] TrigonometricFloatingPoint/MathFloatingPoint protocol?

Stephen Canon scanon at apple.com
Thu Aug 3 06:04:13 CDT 2017

> On Aug 2, 2017, at 7:03 PM, Karl Wagner via swift-evolution <swift-evolution at swift.org> wrote:
> It’s important to remember that computers are mathematical machines, and some functions which are implemented in hardware on essentially every platform (like sin/cos/etc) are definitely best implemented as compiler intrinsics.

sin/cos/etc are implemented in software, not hardware. x86 does have the FSIN/FCOS instructions, but (almost) no one actually uses them to implement the sin( ) and cos( ) functions; they are a legacy curiosity, both too slow and too inaccurate for serious use today. There are no analogous instructions on ARM or PPC.

– Steve
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