Fixed point also has the advantage that you can do it quickly without needing a floating point unit in your CPU. That means you can do it on microcontrollers, a

Fixed point also has the advantage that you can do it quickly without needing a floating point unit in your CPU. That means you can do it on microcontrollers, and you can do it in the kernel without needing to save extra user context on kernel entry (this is only relevant on architectures that have separate floating point registers).