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Illegal Instruction Generation

Concept

First seen 5/25/2026
Last seen 6/14/2026
Evidence 4 chunks
Wiki v1

WIKI

Illegal Instruction Generation

Overview

Illegal Instruction Generation is a verification capability used to create invalid or unsupported instruction encodings as part of processor validation. In the RISC-V verification ecosystem, this capability is supported by RISCV-DV, an open-source SystemVerilog/UVM instruction generator for RISC-V processor verification.[1]

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NEIGHBORHOOD

2 nodes · 1 edges
graph · Illegal Instruction Generation · depth=1

RELATIONSHIPS

2 connections
riscv-dv ← implements 1e
RISCV-DV implements illegal instruction generation.
TheHuzz ← uses 100% 1e
TheHuzz generates illegal instructions by mutating opcode bits to test the processor with out-of-spec inputs.