SIMD static functions only on S4TF toolchain

[porterchild]

On the S4TF toolchain, I can use static transcendental functions on SIMD types like this:
let powSimd = SIMD2.pow(mySimd, 2)

On the normal Xcode toolchain, this is not available. A cursory exploration suggests that on the S4TF toolchain, SIMD types have been conformed to ElementaryFunctions, which is part of the Numerics library (is that true?).

Is there a way to get these functions on the normal Xcode toolchain? Are they on track to be mainlined? Are they only implemented on S4TF so far? import Numerics doesn't seem to give me those functions.

[dan-zheng]

Here's some context regarding ElementaryFunctions:

ElementaryFunctions protocol and conformances were added but then removed from apple/swift master branch. It's since been moved to apple/swift-numerics.

ElementaryFunctions protocol and conformances were manually re-added to apple/swift tensorflow branch because tensorflow/swift-apis optimizers depend on it. tensorflow branch also provides ElementaryFunctions derived conformances (examples): we haven't taken time to pitch this via Swift Evolution to master branch yet.

---

Is there a way to get these functions on the normal Xcode toolchain? Are they on track to be mainlined? Are they only implemented on S4TF so far? import Numerics doesn't seem to give me those functions.

When ElementaryFunctions was moved from master branch to apple/swift-numerics, the SIMD{n} conformances appear to have been dropped. I asked about re-adding those conformances to apple/swift-numerics: apple/swift-numerics#103

All surprising behavior is due to ad-hoc differences between apple/swift tensorflow branch vs master branch. We should consider ways to eliminate these differences: adding apple/swift-numerics as an official dependency to tensorflow/swift-apis, pitching and upstreaming ElementaryFunctions derived conformances, etc.

[porterchild]

Could you point me to the code to do this?:

ElementaryFunctions protocol and conformances were manually re-added to apple/swift tensorflow branch

Would that just be a copy paste to add manually if I want to use those functions on the regular Xcode toolchain?

[dan-zheng]

Sure, here's the gyb'd code for SIMD{n}: ElementaryFunctions conformances.
Here's the expanded Swift code, I generated it locally on macOS.

Would that just be a copy paste to add manually if I want to use those functions on the regular Xcode toolchain?

Yes, I believe so. This code probably won't work with S4TF toolchains though due to redefinition errors.

[porterchild]

Thanks Dan!

[dan-zheng]

Closing now, since the original question is really a feature request for apple/swift-numerics: apple/swift-numerics#103.

Is there a way to get these functions on the normal Xcode toolchain? Are they on track to be mainlined? Are they only implemented on S4TF so far? import Numerics doesn't seem to give me those functions.