> Suppose that you want to reorder, arbitrarily, the bits in a 64-bit word. What... | Hacker News

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LispSporks22 on June 30, 2023 | parent | context | favorite | on: Dynamic bit shuffle using AVX-512

> Suppose that you want to reorder, arbitrarily, the bits in a 64-bit word.

What's the application of this? Theres's a Twitter article in the next sentence, but looks like I need to sign up to see it.

dan-robertson on June 30, 2023 | [–]

Static reorderings can be used for some data layouts, eg interleaving the bits of an x and y coordinate, but you should hope they’d be cheaper than dynamic reordering.

trillic on June 30, 2023 | [–]

Cryptography

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