Overview
Vector Extensions are identified in the evidence as a RISC-V processor feature area that verification teams may need to validate explicitly. They appear alongside other RISC-V features and specification areas such as MMU, PMP, ePMP, and hypervisor support in verification planning and compliance-oriented flows. [C1]
Role in RISC-V verification
The evidence describes vector extensions as an area addressed by targeted verification suites. In the ImperasTS family, TS-VECT is specifically described as a targeted suite for vector extensions. [C2]
Directed suites such as TS-VECT are used as part of a hybrid coverage-closure methodology: constrained-random stimulus explores broad behavior, while directed suites target areas where random stimulus may leave gaps. [C3]
Configuration and applicability
The test suites for vector, MMU, PMP, and ePMP are described as configurable to match the user's RISC-V processor. This means vector-extension validation is presented as implementation-aware rather than one-size-fits-all. [C4]
Use in coverage closure
The provided flow recommends applying targeted ImperasTS suites, including those for vector extensions, where coverage gaps remain. This places vector-extension testing in the later, directed phase of a hybrid strategy after broader exploration and coverage analysis. [C5]
Verification methodology context
The broader methodology combines:
- constrained-random stimulus, described using STING;
- directed suites, including ImperasTS-VECT for vector extensions;
- functional coverage analysis;
- deterministic replay of failing cases; and
- portability across simulation, emulation, FPGA prototyping, and silicon. [C3][C5][C6]
Within this methodology, vector extensions are one of the targeted RISC-V feature areas that can require explicit directed testing to support coverage closure and compliance-oriented validation. [C1][C2][C5]