Add vectorized paths for Span<T>.Reverse - #64412

Merged

adamsitnik merged 14 commits into

dotnet:mainfrom

amd:vectorize-span-reverse

Apr 26, 2022

Commits on Apr 25, 2022

Adding vectorized path for Span<byte>.Reverse that uses SSSE3 and AVX2 where possible
alexcovington
committed
904bb85
Added vectorized paths for Span<T>.Reverse for primitive types that are the same size as char, int, or long that use AVX2 or SSSE3 where possible
alexcovington
committed
088771f
Apply suggestions from code review

alexcovington
and
teo-tsirpanis
committed
fd882e9
Added vectorized paths for Span.Reverse to Array.Reverse. Added explicit inlining and moved generic fallbacks into their own private methods.
alexcovington
committed
74deff7
Consolidate fall back case into single method, use one wrapper for both Span.Reverse and Array.Reverse
alexcovington
committed
2899789
Remove redundant AggressiveInlining, add AggressiveInlining to single wrapper instead
alexcovington
committed
a6c8101
Simplify method names, add comments
alexcovington
committed
3aa7cf1
Just overload Reverse
alexcovington
committed
86caa86
Use Unsafe.Subtract where it is semantically more intuitive, camelCase for reverseMask variable
alexcovington
committed
7c4cd52
Camel case formatting, add condition check for Array.Reverse to avoid reversing empty or single-element array, better shuffle for int and long Reverse using bit control mask instead of vector contr…
alexcovington
committed
3c3f140
Rework loops to use new LoadUnsafe/StoreUnsafe vector APIs. Use Permute4x64 and PermuteVar8x32 for Int32 and Int64 respectively to reduce total operations.
alexcovington
committed
94f45cc
Improve readability of code
alexcovington
committed
39e906f
Fix formatting, fix typos in comments
alexcovington
committed
1ed5bef
Use temporary variable for generic case instead for better IL
alexcovington
committed
80ae8ab

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Add vectorized paths for Span<T>.Reverse - #64412

Add vectorized paths for Span<T>.Reverse#64412
adamsitnik merged 14 commits into
dotnet:mainfrom
amd:vectorize-span-reverse

Commits on Apr 25, 2022

Adding vectorized path for Span<byte>.Reverse that uses SSSE3 and AVX2 where possible

Added vectorized paths for Span<T>.Reverse for primitive types that are the same size as char, int, or long that use AVX2 or SSSE3 where possible

Apply suggestions from code review

Added vectorized paths for Span.Reverse to Array.Reverse. Added explicit inlining and moved generic fallbacks into their own private methods.

Consolidate fall back case into single method, use one wrapper for both Span.Reverse and Array.Reverse

Remove redundant AggressiveInlining, add AggressiveInlining to single wrapper instead

Simplify method names, add comments

Just overload Reverse

Use Unsafe.Subtract where it is semantically more intuitive, camelCase for reverseMask variable

Camel case formatting, add condition check for Array.Reverse to avoid reversing empty or single-element array, better shuffle for int and long Reverse using bit control mask instead of vector contr…

Rework loops to use new LoadUnsafe/StoreUnsafe vector APIs. Use Permute4x64 and PermuteVar8x32 for Int32 and Int64 respectively to reduce total operations.

Improve readability of code

Fix formatting, fix typos in comments

Use temporary variable for generic case instead for better IL