NAME Alien::Bit - Find or install the Bit library VERSION version 0.07 SYNOPSIS Installs the Bit library, used to manipulate bitsets and their packed containers DESCRIPTION This distribution provides the library "Bit" so that it can be used by other Perl distributions that are on CPAN. It will download "Bit" from Github and will build the (static and dynamic) versions of the library for use by other Perl modules. SEE ALSO Bit::Set This module provides a procedural Perl interface to the C library Bit , for creating and manipulating bitsets. It uses "FFI::Platypus" to wrap the C functions and "Alien::Bit" to locate and link to the C library. Bit::Set::DB This module provides a procedural Perl interface to the C library "Bit", for creating and manipulating containers of bitsets (BitDB). It uses "FFI::Platypus" to wrap the C functions and "Alien::Bit" to locate and link to the C library. The main purpose of this library is to provide multithreaded and hardware accelerated (e.g. GPU) versions of container operations e.g. forming the population count of the intersection of two containers of bitsets. Bit Bit is a high-performance, uncompressed bitset implementation in C, optimized for modern architectures. The library provides an efficient way to create, manipulate, and query bitsets with a focus on performance and memory alignment. The API and the interface is largely based on David Hanson's Bit_T library discussed in Chapter 13 of "C Interfaces and Implementations", Addison-Wesley ISBN 0-201-49841-3 extended to incorporate additional operations (such as counts on unions/differences/intersections of sets), fast population counts using the libpocnt library and GPU operations for packed containers of (collections) of Bit(sets). libpopcnt libpopcnt.h is a header-only C/C++ library for counting the number of 1 bits (bit population count) in an array as quickly as possible using specialized CPU instructions i.e. POPCNT, AVX2, AVX512, NEON, SVE. libpopcnt.h has been tested successfully using the GCC, Clang and MSVC compilers. Bit::Fast Bit::Fast - A set of fast bit manipulation routines. It provides a population count routine in Perl. In platforms with builtin popcount routines, it will use them for better performance. Otherwise, it uses a tree-of-adders algorithm, that is based entirely on bitmasks and shift operations. This is likely to be slower than the Wilks Wheeler Gill algorithm in platforms that have fast 64 bit multiplication operations. Bit::Vector Efficient bit vector, set of integers and "big int" math library. It is a very complete implementation of a bit vector with a different interface than Bit. It provides many more operations that the implementation of Bit does. Algorithm::BitVector A memory efficient packed representation of arbitrary sized bit arrays and for logical and arithmetic operations on such arrays. Alien Documentation on the Alien concept itself. Alien::Base The base class for this Alien. Alien::Build::Manual::AlienUser Detailed manual for users of Alien classes. AUTHOR Christos Argyropoulos COPYRIGHT AND LICENSE This software is copyright (c) 2025 by Christos Argyropoulos. This is distributed under the BSD-2 license