rivos-visni

1.0.0Readiness: RL1 — Packaged

by extensilica

Rivos XRivosVisni vector integer small new instructions (zero/insert/extract)

No confirmed encoding conflictsShares encoding space with 1 extension(s)

Show encoding relation details

rivos-zizip INFO

SHARED_MAJOR_OPCODE: opcode 0x5B — shared major opcode; not a conflict by itself. A true conflict requires overlapping full decode mask/match patterns, including any fixed register/immediate field constraints.
SHARED_CUSTOM_SPACE: both declare custom-2; shared custom space (no per-vendor allocation in RISC-V). Not a conflict on its own — composing both needs opcode remapping or selective enable.

Pre-silicon bridge: this package is meant to be evaluable before RTL/FPGA/ASIC decisions.

Install

xsil install rivos-visni

Run

xsil run rivos-visni

Requires ISA RV64IV_Xrivosvisni

Details

Published

May 14, 2026

Latest

1.0.0

Standard

Vendor

Rivos Inc.

Provenance

Seeded · unverified

Auto-published from upstream by the ExtenSilica catalog-seed agent. The original maintainer has not (yet) claimed authorship.

ISA

RV64IV_Xrivosvisni

Readiness

Readiness: RL1 — Packaged

ISAToolchain: externalTestsRepro: host-dependent

Toolchain

riscv64-unknown-elf · v14.2.0 (external)

Cite

CFF and BibTeX for papers and Zenodo (v1.0.0).

CFF

cff-version: 1.2.0
type: software
title: rivos-visni
version: 1.0.0
authors:
  - name: extensilica
abstract: "Rivos XRivosVisni vector integer small new instructions (zero/insert/extract)"
message: "If you use this software, please cite it using the metadata from this file."
repository-code: https://github.com/rivosinc/rivos-custom-extensions
url: https://extensilica.com/package/rivos-visni
date-released: 2026-05-14
identifiers:
  - type: url
    value: https://extensilica.com/package/rivos-visni
  - type: url
    value: https://github.com/rivosinc/rivos-custom-extensions

BibTeX

@software{rivos_visni_1_0_0,
  title = {rivos-visni},
  author = {extensilica},
  year = {2026},
  version = {1.0.0},
  url = {https://extensilica.com/package/rivos-visni},
  repository = {https://github.com/rivosinc/rivos-custom-extensions},
}

Downloads

7 days

30 days

Maintainers

extensilica

Links

Repository

Implementation requests

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Readiness & capabilities

Readiness: RL1 — Packaged

Runnable (entry declared)

Testable (testEntry declared)

Repro: bundled

Repro: resolved

Repro: host-dependent

Toolchain: bundled

Toolchain: external

Sim: Spike

Emu: QEMU

RTL

FPGA

Tests

README

Rivos XRivosVisni vector integer small new instructions (zero/insert/extract)

Version History

Version	Published	Size	Downloads	Status
1.0.0latest `xsil install [email protected]`	May 14, 2026	3.8 KB	0	active

Downloads

Last 7 days

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All time

Daily downloads — last 30 days

06-1506-2206-2907-0607-1307-14

By version

1.0.0

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