Can Extended RabbitQ support avx256?

[Revendell]

Currently, Extended RabbitQ only supports AVX512. Will Extended RabbitQ support AVX256?

[gaoj0017]

Could you clarify which specific features you’re looking for in the multi-bit RaBitQ implementation under AVX2? Multi-bit compact storage typically requires dedicated kernels for each bit-width configuration, so understanding the most important use cases would help us determine what to prioritize.

[Revendell]

I want to use multi-bit quantization to balance memory cost and recall rate. However, many of our older machines only support AVX2, not AVX512, so I hope to have AVX2 support.

[Revendell]

For example, pack code, rabitqlib::quant::rabitq_impl::ex_bits,current only support AVX512F only for packing excode.And select_excode_ipfunc also needs AVX512.

[gaoj0017]

I see your points. Which bit-width is most important for your applications?

[Revendell]

4bit_excode and 5bit_excode

[gouyt13]

Thanks for your interests.
Now, we have published a new version which fully supports AVX2.