RTLIB Arithmetic Operators: Key Functions

In compiler design—specifically within LLVM and GCC—RTLIB stands for Run-Time Library.

When you write source code containing standard arithmetic operators (+, -, *, /, %), modern hardware cannot always execute those operations natively. For instance, a 32-bit microprocessor cannot natively divide a 64-bit integer, and many embedded microcontrollers completely lack a floating-point unit (FPU).