ypomortsev commented on issue #54920:
URL: https://github.com/apache/arrow/issues/54920#issuecomment-6350177173
Right, the signed implementation can use the fact that valid signed values
are the same bitwise as unsigned, e.g. pseudocode
```python
signed_idx = pa.array([0, 1, 2, 3], pa.int32())
if pc.min(signed_idx) >= 0:
raise ArrowIndexError
unsigned_idx = pa.view(signed_idx, pa.uint32())
return pc.inverse_permutation(unsigned_idx)
```
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