How to generate all the possible de Bruijn sequences/constants and corresponding tables for counting leading/trailing zeroes on an unsigned integer?

• de-bruijn

  1 23 10.0 JavaScript

  Discontinued generate de bruijn sequences

github.com/substack/de-bruijn/blob/master/index.js

• de-bruijn-generator

  1 2 0.0 JavaScript

  📦 A javascript implementation of the de Bruijn sequence algorithm

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• compiler-rt

  2 284 10.0 C

  Discontinued Project moved to: https://github.com/llvm/llvm-project

  

I don't think understanding it is very relevant to OPs goal of learning how low level compiler builtins are implemented though. Compiler clz() functions don't use debruijn sequences or lookup tables, even on platforms without dedicated instructions for them. Here's the relevant code for LLVM.

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