Nios® II Software Developer Handbook

ID 683525
Date 8/28/2023
Public
Document Table of Contents

9.5.4.1. Unimplemented Instructions

You can include a handler to emulate unimplemented instructions. The Nios® II processor architecture defines the following implementation-dependent instructions:
  • mul
  • muli
  • mulxss
  • mulxsu
  • mulxuu
  • div
  • divu

    For more information about unimplemented instructions, refer to “Unimplemented Instructions” in the "Processor Architecture" chapter of the Nios® II Processor Reference Handbook.

For more information about how unimplemented instructions are different from invalid instructions, refer to the “Invalid Instructions” chapter.