Need Argsort For 32Bit Index For 32Bit Types
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- Dominant language
- C++
- Stars
- 1k
- Forks
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Description
We only have argsort whose indexes are (unsigned) int64_t. For 32bit types like int/float, I think argsort with int32_t as index type can also be provided, which may performs better with avx512's i32gather_ps/epi32 instructions. Also, this function can be easily implemented in AVX2 plantforms.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the existing argsort implementation that uses unsigned int64_t indexes and its AVX2 and AVX512 paths. Compare the requested int32_t index behavior with the mentioned i32gather_ps and epi32 instructions. Done means providing an int32_t-index argsort for 32-bit types with coverage for the relevant platforms and performance validation.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- performance
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100