Portable high-level bitwise manipulation algorithms

Work in progress.

The algorithms:

• have descriptive names to ease reading code that performs bit manipulations,
• often optimize to perfect assembly code (and always on nightly by using the bitintr crate),
• works on ~~stable~~ unstable only :( due to specialization for now.

Example

```rust extern crate bitwise; use bitwise::word::*;

fn main() { let u = outerperfectshuffle(0b10011111u8); let v = innerperfectshuffle(0b10011111u8); let w = u.copybit(4u8, v, 3u8); asserteq!(w.parallelbitsdeposit(u), 0b10010011u8); } ```

Supported compilers

The minimum required rustc version is >= 1.13.0.

Requires unstable for now.

Performance

Some algorithms like the Morton Z-Curve encoding/decoding routines switch implementation at compile-time depending on target features (like BMI2 support).

License

Licensed under the MIT license.

Acknowledgments

The giants that came before us:

• Matthew Fioravante's N3864 A constexpr bitwise operations library for C++ proposal and accompanying library: stdcxx-bitops.
• Henry S. Warren's Hacker's Delight.
• Jeroen Baert's libmorton.
• The Chess Programming Wiki, in particular the bit-twiddling section.
• Real-Time Collision Detection.
• My own's bitintr library.
• Jasper Neumann's programming pages.
• Jörg Arndt's Matters Computational: Ideas, Algorithms, Source Code.

Contribution

Yes please! Just note that all contributions shall be licensed as above without any additional terms or conditions.