Implement AVX2 Intrinsics

[tannergooding]

Pending:

• AlignRight
• Blend
• ConvertToDouble
• ConvertToInt32
• ConvertToUInt32
• GatherVector128
• GatherVector256
• GatherMaskVector128
• GatherMaskVector256
• MaskLoad
• MaskStore
• MultipleSumAbsoluteDifferences
• MultiplyAddAdjacent
• MultiplyHigh
• MultiplyHighRoundScale
• MultiplyLow
• PackSignedSaturate
• PackUnsignedSaturate
• Permute4x64
• PermuteVar8x32
• ShiftRightArithmeticVariable
• Shuffle
• ShuffleHigh
• ShuffleLow
• Sign
• SumAbsoluteDifferences

category:reach
theme:intrinsics
skill-level:intermediate
cost:large

[tannergooding]

@fiigii, could you confirm which ones you are currently planning on implementing?

[fiigii]

could you confirm which ones you are currently planning on implementing?

BroadcastScalarToVector128
BroadcastScalarToVector256
BroadcastVector128ToVector256
Extract*
Insert*

[fiigii]

Could you please update this list?

[tannergooding]

@fiigii, should be updated now.

[fiigii]

Thank you so much.

[fiigii]

@tannergooding I see that you assigned this issue to your self. Are you implementing these AVX2 intrinsics?

[tannergooding]

Yes. I am working on most of them right now. We can split them if you have some spare time/etc :)

[fiigii]

Thanks for the work. Could you share which ones you are working on? I will some spare time next week 😄

[tannergooding]

@fiigii, I am currently just working on them in alphabetical order. I'll have a PR up Monday morning with w/e I completed over the weekend.

[fiigii]

@tannergooding Are you implementing some APIs in this list? I want to continue in alphabetical order.

[tannergooding]

@fiigii, I am finalizing the BMI intrinsics. The list should be free to pull from 😄

[fiigii]

Thanks, I will pick up MaskLoad, MaskStore, and ShiftRightArithmeticVariable (this missed in my previous PR).