2 Features of libjit

• The primary interface is in C, for maximal reusability. Class interfaces are available for programmers who prefer C++.
• Designed for portability to all major 32-bit and 64-bit platforms.
• Simple three-address API for library users, but opaque enough that other representations can be used inside the library in future without affecting existing users.
• Up-front or on-demand compilation of any function.
• In-built support to re-compile functions with greater optimization, automatically redirecting previous callers to the new version.
• Fallback interpreter for running code on platforms that don’t have a native code generator yet. This reduces the need for programmers to write their own interpreters for such platforms.
• Arithmetic, bitwise, conversion, and comparison operators for 8-bit, 16-bit, 32-bit, or 64-bit integer types; and 32-bit, 64-bit, or longer floating point types. Includes overflow detecting arithmetic for integer types.
• Large set of mathematical and trigonometric operations (sqrt, sin, cos, min, abs, etc) for inlining floating-point library functions.
• Simplified type layout and exception handling mechanisms, upon which a variety of different object models can be built.
• Support for nested functions, able to access their parent’s local variables (for implementing Pascal-style languages).

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