Vectorized CLZ and CTZ

3 comments

• wahern 1 hour ago
  Pretty cool that they seemed to have come up with the idea on their own, but they're definitely not the first: https://graphics.stanford.edu/~seander/bithacks.html#ZerosOn...
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  • teo_zero 22 minutes ago
    To be fair, the article contains 3 methods. The first one is original, the second one is the same algorithm you linked, and the third one is an evolution of it.
• jandrewrogers 3 hours ago
  This is a good illustration of what competent SIMD code requires.
• saagarjha 3 hours ago
  Might be useful on a GPU or something I guess?