Fix some low-hanging HWIntrinsic issues#80626

Merged

tannergooding merged 10 commits intodotnet:mainfrom

tannergooding:better-simd

Jan 15, 2023

Commits on Jan 13, 2023

Ensure isSimdAsHWIntrinsic is false for Vector64/128/256.WithElement
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Ensure AsVector2 and AsVector3 are intrinsic
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Ensure AsVector128(Vector2) and AsVector128(Vector3) are handled as intrinsic
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Ensure Vector64/128/256.AsNInt and AsNUInt are handled as intrinsic
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Ensure Vector*<T>.IsSupported is handled as intrinsic
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Ensure get_Count for Vector64/128/256<T> and Vector<T> is handled as intrinsic
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Apply formatting patch
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Ensure the right simdSize is selected for AsVector128
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Ensure AsVector2/3 are correctly handled in lowering
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Commits on Jan 14, 2023

Ensure AsVector2 passes in op1 on Arm64
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