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CpuMath Enhancement: Preamble for hardware intrinsics implementation #830

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CpuMath Enhancement: Preamble for hardware intrinsics implementation#830
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Priority:2Work that is important, but not critical for the releasearea-NativeNative libraries, platform support, and architecture-specific codeenhancementNew feature or requestgreendevelopmenthelp wanted[up-for-grabs] Good issue for external contributors

Description

@briancylui
briancylui
opened on Sep 5, 2018

Style changes needed to solve part of #823

Details

  • Do "preamble" for the implementation of SSE/AVX intrinsics in src\Microsoft.ML.CpuMath\SseIntrinsics.cs and src\Microsoft.ML.CpuMath\AvxIntrinsics.cs:

Preamble:

  1. while (!aligned) { do scalar operation; } // preamble
  2. Do vectorized operation using ReadAligned
  3. while (!end) { do scalar operation; }
    For large arrays, especially those that cross cache line or page boundaries, doing this should save some measurable amount of time.

Reference: https://github.com/dotnet/machinelearning/pull/562/files/f0f81a5019a3c8cbd795a970e40d633e9e1770c1#r204061074
#1143

Currently these functions are just using Unaligned Loads, we can make them after by aligning the data and doing aligned loads.

  • AddScalerU
  • ScaleSrcU
  • AddScaleU
  • ScaleAddU
  • AddU
  • AddScaleCopyU
  • AddSU
  • MulElementWiseU
  • SumU
  • SumSqU
  • SumSqDiffU
  • SumAbsU
  • SumAbsDiffU
  • MaxAbsU
  • MaxAbsDiffU
  • DotU
  • DotSU
  • Dist2
  • SdcaL1UpdateU
  • SdcaL1UpdateSU

Activity

  1. briancylui
    changed the title [-]Preamble for hardware intrinsics implementation[/-] [+]CpuMath Enhancement: Preamble for hardware intrinsics implementation[/+] on Sep 6, 2018
  2. Anipik
    added
    up-for-grabs
    on Oct 18, 2018
  3. gvashishtha
    added
    P2
    enhancementNew feature or request
    on Jan 9, 2020
  4. rosebyte
    added
    Priority:2Work that is important, but not critical for the release
    area-NativeNative libraries, platform support, and architecture-specific code
    help wanted[up-for-grabs] Good issue for external contributors
    and removed
    up-for-grabs
    P2
    on Sep 8, 2026
  5. rosebyte
    added
    greendevelopment
    on Sep 21, 2026
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    Priority:2Work that is important, but not critical for the releasearea-NativeNative libraries, platform support, and architecture-specific codeenhancementNew feature or requestgreendevelopmenthelp wanted[up-for-grabs] Good issue for external contributors

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