custom RISC-V instruction

Concept

First seen 8/28/2026

Last seen 8/28/2026

Evidence 7 chunks

NEIGHBORHOOD

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9 connections

Functional Coverage ← evaluates 95% 3e

Functional coverage measures whether semantically distinct situations for the custom instruction have been exercised.

CPU ← uses 88% 2e

CPU-level verification focuses on the externally visible architectural behaviour of custom instructions.

Directed semantic tests are used first to establish that a custom instruction has the correct semantics.

riscv-dv ← uses 95% 1e

riscv-dv supports generating instruction streams that include custom RISC-V instructions.

RISC-V part of → 95% 1e

Custom RISC-V instructions are proprietary extensions added within the RISC-V architectural framework.

Reference Model ← mentions 95% 1e

The reference model must implement the custom instruction's intended architectural behaviour independently.

Custom RISC-V instructions should use the reserved custom opcode spaces.

Formal Verification ← evaluates 92% 1e

Formal verification can be applied to prove properties of custom RISC-V instructions where the state space is narrow enough.

Retirement-level state comparison evaluates whether the custom instruction produces the correct architectural effects.