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Implement light-weight K register ExtractMostSignificantBits for Vector512 #80820

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anthonycanino opened this issue Jan 18, 2023 · 3 comments
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Implement light-weight K register ExtractMostSignificantBits for Vector512 #80820

anthonycanino opened this issue Jan 18, 2023 · 3 comments
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@anthonycanino
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area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI avx512 Related to the AVX-512 architecture
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8.0.0

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@anthonycanino
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On Intel arch, ExtractMostSignificantBits for 512 bit vectors requires the use of the AVX512 opmask (K) registers. This task is to implement the capability of ExtractMostSignificantBits for Vector512 using a single opmask register. This is to allow Vector512 to be used in optimization, but without the implementation overhead of implementing full opmask register support in the register allocator, which will come at a later date.
@dotnet-issue-labeler dotnet-issue-labeler bot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Jan 18, 2023
@ghost ghost added the untriaged New issue has not been triaged by the area owner label Jan 18, 2023
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ghost commented Jan 18, 2023

Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch, @kunalspathak
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Issue Details

On Intel arch, ExtractMostSignificantBits for 512 bit vectors requires the use of the AVX512 opmask (K) registers. This task is to implement the capability of ExtractMostSignificantBits for Vector512 using a single opmask register. This is to allow Vector512 to be used in optimization, but without the implementation overhead of implementing full opmask register support in the register allocator, which will come at a later date.

Author: anthonycanino
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area-CodeGen-coreclr
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@BruceForstall BruceForstall added this to the 8.0.0 milestone Jan 19, 2023
@ghost ghost removed the untriaged New issue has not been triaged by the area owner label Jan 19, 2023
@BruceForstall BruceForstall added untriaged New issue has not been triaged by the area owner avx512 Related to the AVX-512 architecture and removed untriaged New issue has not been triaged by the area owner labels Jan 19, 2023
@BruceForstall BruceForstall mentioned this issue Jan 19, 2023
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@anthonycanino
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@JulieLeeMSFT you may assign me for tracking purposes.

@anthonycanino anthonycanino mentioned this issue Feb 27, 2023
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@teo-tsirpanis
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Fixed by #82731.

@JulieLeeMSFT JulieLeeMSFT mentioned this issue Apr 4, 2023
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@ghost ghost locked as resolved and limited conversation to collaborators Apr 11, 2023
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@anthonycanino anthonycanino

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area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI avx512 Related to the AVX-512 architecture
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