Nios® V Processor Software Developer Handbook

ID 743810
Date 10/31/2022
Public

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8.6.4.3. Invalid Instructions

An invalid instruction word contains invalid codes in the OP or OPX field. Invalid instructions originate from undefined or unimplemented instructions. They are handled the same as any miscellaneous exceptions.

For more information about the RISCV-based processor instruction, refer to the The RISC-V Instruction Set Manual in RISC-V International website.