There are additional tricks that are more specialized or generalizations of the ideas here beyond their presented scope, like SWAR (SIMD Within A Register) over

There are additional tricks that are more specialized or generalizations of the ideas here beyond their presented scope, like SWAR (SIMD Within A Register) over arbitrary packed bitfields. I realize this is not that helpful but most of the tricks not listed here won’t be interesting to most people. Many of the bit twiddling tricks that are widely known are also known to compilers, which can generate them automatically. Hell, x86 has single instructions that implement many of the well-known tricks directly. Where these tricks become handy again is SIMD vectorization. The compiler is much less clever in these situations and the scalar bit-twiddling instructions often don’t have vectorized equivalents.