Support Intel IceLake ISAs through target_feature #67329

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1. JohnTitor

   added

   C-feature-requestCategory: A feature request, i.e: not implemented / a PR.Category: A feature request, i.e: not implemented / a PR.

   on Jan 19, 2020
2. jonas-schievink

   added

   O-x86_64Target: x86-64 processors (like x86_64-*) (also known as amd64 and x64)Target: x86-64 processors (like x86_64-*) (also known as amd64 and x64)

   A-SIMDArea: SIMD (Single Instruction Multiple Data)Area: SIMD (Single Instruction Multiple Data)

   T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

   on Feb 6, 2020
3. workingjubilee commented on Sep 18, 2020

   

   workingjubilee

   on Sep 18, 2020

   Last edited by workingjubilee

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   The reference is outdated only concerned with stable here, there is partial AVX512 support in core::arch and the compiler on nightly, as can be seen here: https://doc.rust-lang.org/core/arch/x86_64/index.html

   As there is quite a lot to support it has not been finished (nor stabilized) however: rust-lang/stdarch#310
   So I believe it does not yet include the specifics of the AVX512 VAES extension you want, either.
4. DevJPM commented on Oct 18, 2020

   

   DevJPM

   on Oct 18, 2020

   Last edited by DevJPM

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   I have looked into implementing this (for nightly at least over on rust-lang/stdarch) however it appears that support is blocked by the compiler not being willing to accept the VAES (and vaguely related VPCLMULQDQ) feature flags for enabling the relevant LLVM intrinsics. And I would be willing to make a PR for the compiler to add that flag, but I'm not sure if there's more to it than "just" adding the "vaes" string here and here. Though the feature seems to be supported in std::detect already though it is named avx512vaes there.

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5. m-ou-se

   added 2 commits that reference this issue on Nov 18, 2020

   Rollup merge of rust-lang#78361 - DevJPM:master, r=workingjubilee

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   db8ad67

   Rollup merge of rust-lang#78361 - DevJPM:master, r=workingjubilee

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   c7e9029
6. workingjubilee commented on Apr 29, 2021

   

   workingjubilee

   on Apr 29, 2021

   Last edited by workingjubilee

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   In #78361, a large amount of support for AVX512 features was added to the compiler, including all the ones (afaict) that IceLake included, resolving this issue for the Rust compiler, and many intrinsics have been added to std::arch since.
7. workingjubilee

   closed this as completedon Apr 29, 2021