BitOp

Lua Bit Operations Module

• Lua BitOp
• Installation
• API Functions
• Semantics
• Download

Lua BitOp is a C extension module for Lua 5.1 - 5.5 which adds bitwise operations on numbers.

Lua BitOp is Copyright © 2008-2026 Mike Pall. Lua BitOp is free software, released under the MIT license (same license as the Lua core).

Features

• Supported functions: bit.tobit, bit.tohex, bit.bnot, bit.band, bit.bor, bit.bxor, bit.lshift, bit.rshift, bit.arshift, bit.rol, bit.ror, bit.bswap
• Consistent semantics across 16, 32 and 64 bit platforms.
• Supports different lua_Number types: either IEEE 754 doubles, int32_t or int64_t.
• Runs on Linux, *BSD, Mac OS X, Windows and probably anything else you can find.
• Simple installation on all systems. No bulky configure scripts. Embedded-systems-friendly.
• Internal self-test on startup to detect miscompiles. Includes a comprehensive test and benchmark suite.
• Compatible with the built-in bitwise operations in LuaJIT 2.0+.
• It's as fast as you can get with the standard Lua/C API.

More ...

Please click on one of the links in the navigation bar to your left to learn more.

Please visit the Download page to fetch the current version of Lua BitOp.

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Copyright © 2008-2026