> On Dec 1, 2017, at 13:18, Jens Persson via swift-users
> <swift-users@swift.org> wrote:
>
> func maxPrecisionCalculation(input:Float80) -> Float80 {
> return input // but something actually reauiring high precision ...
> }
AFAIK, Float80 is the high precision format on macOS (well, Intel macs,
anyway... can’t recall if Swift can target OSs old enough to run on PPC macs).
I’d avoid using it, though. AFAIK it’s an x86-only format (it might even be
Intel-only... 5-10 minutes of googling didn’t give me a clear answer on whether
AMD’s CPUs support it).
I don’t know what we do with it on ARM targets, and I’m not at my computer to
try to figure out.
Unless maybe the x86 or ARM vector extensions support 128 or 256 bit floats? I
don’t think they do, but I’m not 100% on that.
- Dave Sweeris
_______________________________________________
swift-users mailing list
swift-users@swift.org
https://lists.swift.org/mailman/listinfo/swift-users
