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by XCSme 1316 days ago
That would be "bitreverse" I guess, plus their description of byteswap[0] is exactly that:

"Reverses the bytes in the given integer value n."

I would expect the description for "byteswap" to be something like "swaps the given bytes of an integer value n." and be called like byteswap(x, a, b), where a and b are the indicies of the bytes to be swapped.

[0]: https://en.cppreference.com/w/cpp/numeric/byteswap