RISC-V Processor Core Technology Landscape 2026
RISC-V Processor Core Technology Landscape 2026
RISC-V has evolved from academic origins into a competitor to ARM and x86 across computing tiers. China dominates with approximately 80% of patent filings, led by ISA extensions, vector processing, and hardware-level ISA bridge architectures.
From Open ISA to Production Silicon: The RISC-V Patent Landscape
RISC-V is an open, royalty-free instruction set architecture built on RISC principles. It is defined by a small base instruction set (RV32I/RV64I), a modular extension framework covering M, F, D, V, C, H, and custom extensions, and multiple privilege levels including machine, supervisor, and user modes.
The dataset spans publications from 2009 to 2026, revealing a three-phase trajectory. The foundational period (2009–2018) saw early binary translation frameworks and IoT-focused multi-threaded cores. The ecosystem expansion phase (2019–2022) produced vector processor silicon tapeouts, multi-core HPC prototypes, and the first open-source RISC-V H-extension implementation.
The advanced specialization phase (2023–2026) is the most active, with subjects including out-of-order low-power cores, wide vector processors, RISC-V/x86 hardware ISA translation, fully homomorphic encryption processors, hardware-aware multilayer IR compilers, and dynamic multi-core cache coherency protocols.
Among retrieved patent records, China (CN) dominates with approximately 80% of patent filings. Top assignees include Shandong Inspur Science Research Institute (5 filings), Institute of Software of the Chinese Academy of Sciences (4 filings), and Shanghai Xinlijii Semiconductor (4 filings). The US and India contribute academic and offshore prosecution filings.
RISC-V Patent Activity by Technology Cluster and Timeline
The retrieved dataset reveals five principal technology sub-domains spanning core pipeline microarchitecture, vector processing, multi-core coherency, virtualization, and tooling. Filing activity accelerated sharply in the 2023–2026 advanced specialization phase.
RISC-V Patent Filings by Technology Cluster (Retrieved Dataset)
Core pipeline microarchitecture and custom ISA extensions form the largest cluster in the dataset, followed by vector processing and multi-core architecture.
↗ Click bars to exploreRISC-V Patent Filing Activity by Innovation Phase (2009–2026)
Filing activity shows a sharp acceleration in the 2023–2026 advanced specialization phase, which dominates the retrieved dataset numerically.
↗ Click bars to exploreKey RISC-V Deployment Domains Across Computing Tiers
RISC-V patent activity spans six principal application domains in the retrieved dataset, from deeply embedded IoT endpoints and mixed-criticality automotive systems to HPC clusters, AI inference, robotics, and security-focused compute.
Embedded and IoT Systems
The Institute of Software, Chinese Academy of Sciences filed two active patents on AIoT-optimized Linux OS stacks in 2022, including OS for AIoT Scenarios Supporting RISC-V Processors. Zhejiang University’s Fast Interrupt System for RISC-V Architecture (2022, CN) addresses deterministic interrupt latency critical for RTOS deployments. Near-threshold operation, multi-threaded control cores, and real-time OS support are the dominant themes.
Embedded / IoTMixed-Criticality and Automotive
The RISC-V H-extension and hypervisor work targets automotive, drone, and industrial safety applications. Shenzhen Lulin Technology filed a RISC-V-Based Virtualization Acceleration patent in 2026 (CN) employing Byzantine consensus protocol for VM migration feasibility verification and zero-copy VM state snapshot transfer. The open-source Bao hypervisor evaluation on a Rocket chip core with FPGA-accelerated simulation demonstrates early production-readiness signals from 2021.
Automotive / IndustrialHigh-Performance Computing
Monte Cimone (2022) demonstrated a multi-node RISC-V cluster based on the SiFive U740 SoC running a full HPC software stack. A 64-bit RISC-V Processor Optimized for HPC Targeting 180nm ASIC was documented in India in 2025. Shandong University filed a RISC-V Server CPU UEFI Firmware Boot Method in 2024 (CN), signaling expanding server-class ambitions.
HPC / ServersAI and Machine Learning Inference
Tsinghua University filed a RISC-V Compatible Fully Homomorphic Encryption Algorithm General Processor patent in 2025 (CN), featuring in-situ computation cores to minimize data movement for privacy-preserving workloads. Guangdong Saiboan Intelligent Technology filed hardware-aware multi-layer IR compiler patents in 2025 (CN) introducing a three-tier SPU/VPU/MPU abstraction cache-hierarchy-aware at compile time. The Institute of Software, Chinese Academy of Sciences filed a Scalable OS for RISC-V Architecture Extension Instruction Sets in 2024 (CN) to support custom ML accelerator extensions.
AI / ML InferenceLeading RISC-V Patent Assignees in the 2026 Dataset
Among retrieved patent records, Chinese institutional and commercial actors dominate. Shandong Inspur Science Research Institute leads with 5 filings, followed by the Institute of Software of the Chinese Academy of Sciences and Shanghai Xinlijii Semiconductor with 4 filings each. Shandong Lingneng Electronic Technology holds filings in both CN and US jurisdictions.
Top RISC-V Patent Assignees by Filing Count (Retrieved Dataset)
↗ Click bars to exploreShandong Inspur Science Research Institute
Leads the retrieved dataset with 5 filings concentrated in 2024–2025, covering real-time thread scheduling (A High-Real-Time Thread Scheduling Method, 2024, CN), bus systems, wide vector processors, and dual ISA operation. The Ultra-Wide RISC-V Long Vector Processor patent (2025, CN) describes a 64-bit scalar core coupled with multiple vector clusters using a full cross-bar interconnect with hierarchical pipeline interconnect. All retrieved filings are in CN jurisdiction.
China — CNInstitute of Software, Chinese Academy of Sciences
Holds 4 retrieved filings spanning 2022–2024 in CN jurisdiction, covering AIoT-optimized Linux OS stacks, scalable OS for RISC-V extension instruction sets, and hardware virtualization dynamic analysis. Key patents include OS for AIoT Scenarios Supporting RISC-V Processors (2022, CN) and Scalable Operating System for RISC-V Architecture Extension Instruction Sets (2024, CN). Filings reflect state-aligned software infrastructure for RISC-V ecosystem development.
China — CNShanghai Xinlijii Semiconductor Co., Ltd.
Holds 4 retrieved filings in CN jurisdiction, focusing on hardware-level instruction set arbitration. The patent A Processor, Method, and System for Dynamically Switching Between RISC-V and x86 Instruction Sets (2025, CN) enables seamless x86/RISC-V switching on a single MCU without software translation overhead. This directly targets the Windows application ecosystem compatibility gap on RISC-V silicon.
China — CNShandong Lingneng Electronic Technology
Holds 3 retrieved filings across CN and US jurisdictions spanning 2022–2025. The US-granted patent RISC-V-Based 3D Interconnected Multi-Core Processor Architecture (2023, US) describes a three-layer architecture with a main control tier of five-stage pipeline master cores, a micro-core array tier, and an accelerator tier. An updated CN filing in 2025 refines the 3D layered architecture with explicit accelerator integration paths.
China / United StatesFour Forward-Looking Trends in RISC-V Innovation (2025–2026)
The most recent filings in the retrieved dataset (2025–2026) signal four distinct forward directions: hardware-level ISA bridge architectures, AI/ML-targeted compiler infrastructure, adaptive multi-core cache coherency, and security/privacy-preserving compute at the core level.
Hardware-Level x86-to-RISC-V ISA Bridge Architectures
At least four separate Chinese assignees filed hardware-level translation patents in 2025–2026. Intel (China) Research Center’s RISC-V Processor and Method for RISC-V Processor (2026, CN) embeds a hardware translation module with a translation cache mapping unsupported instructions to micro-operations at the decode stage. Shanghai Xinlijii’s dual-ISA arbitrator (2025, CN) enables seamless x86/RISC-V switching on a single MCU without software translation overhead. This cluster directly targets the Windows/x86-legacy software ecosystem compatibility gap.
AI/ML-Targeted Hardware-Aware Compiler Infrastructure
Guangdong Saiboan Intelligent Technology’s Hardware-Aware Multi-Layer Intermediate Representation Compiler (2025, CN) introduces a three-tier computing abstraction (SPU/VPU/MPU) aware of cache hierarchy at compile time, bridging RISC-V’s ISA extensibility with practical ML workload deployment. The Institute of Software, Chinese Academy of Sciences filed a Scalable OS for RISC-V Architecture Extension Instruction Sets (2024, CN) to address OS-level scaffolding required for custom ML accelerator extensions. These filings indicate a maturing software stack for RISC-V AI hardware.
RISC-V Hardware ISA Bridge vs. Software Binary Translation
Click any row to explore further.
| Dimension | Hardware ISA Bridge (2025–2026 filings) | Software Binary Translation |
|---|---|---|
| Mechanism | Translation cache embedded in decode pipeline mapping unsupported instructions to micro-operations at decode stage | Software-layer dynamic binary translation; soft-/hardware co-design frameworks (early SJTU patents, 2009/2011) |
| Representative Filing | Intel (China) Research Center — RISC-V Processor and Method for RISC-V Processor (2026, CN); Shanghai Xinlijii — Dynamically Switching RISC-V and x86 Processor (2025, CN) | Shanghai Jiao Tong University dynamic binary translation patents (2009, 2011, CN) |
| Translation Overhead | No software translation overhead; hardware arbitration at instruction decode stage | Software translation overhead present; dependent on translation table hit rates |
| Pipeline Disruption | Designed to enable forward ISA compatibility without pipeline disruption (Intel China 2026 claim) | Pipeline impact depends on co-design depth; early frameworks targeted soft-core FPGAs |
| Target Use Case | Windows/x86-legacy software ecosystem on RISC-V silicon; server and desktop platforms | ISA compatibility research; embedded co-design environments; FPGA prototyping |
| Filing Jurisdiction | CN (primary), representing ~80% of retrieved filings | CN (Shanghai Jiao Tong University foundational filings) |
| Innovation Phase | Advanced specialization (2023–2026) — numerically dominant phase in retrieved dataset | Foundational period (2009–2018) — early ecosystem work |
| Key Assignees | Intel (China) Research Center Co., Ltd.; Shanghai Xinlijii Semiconductor Co., Ltd. | Shanghai Jiao Tong University (historical); Hangzhou University of Electronic Science and Technology (CGRA dynamic reconfiguration, 2024) |
Frequently Asked Questions: RISC-V Processor Core Patents
China (CN) dominates with approximately 80% of patent filings in the retrieved dataset. No European Patent Office (EP), Japanese (JP), or Korean (KR) filings appear in this dataset. India (IN) and the United States (US) are secondary contributors, with Indian filings predominantly academic and US filings largely representing offshore patent prosecution of Chinese-originated innovations.
The top assignees by filing count in the retrieved dataset are: Shandong Inspur Science Research Institute Co., Ltd. (5 filings, CN), Institute of Software, Chinese Academy of Sciences (4 filings, CN), Shanghai Xinlijii Semiconductor Co., Ltd. (4 filings, CN), Shandong Lingneng Electronic Technology Co., Ltd. (3 filings, CN/US), and Shandong University (2 filings, CN).
Core pipeline microarchitecture and custom ISA extensions is described as the largest cluster in the dataset. Designs range from simple five-stage in-order pipelines for IoT to out-of-order superscalar cores for edge AI. A recurring mechanism is augmenting the base pipeline with tightly coupled custom functional units accessible via custom instruction opcodes.
Four distinct forward directions are identified from 2025–2026 filings: (1) hardware-level ISA bridge architectures for x86/RISC-V translation at the decode stage, with at least four Chinese assignees filing; (2) AI/ML-targeted hardware-aware compiler infrastructure with multi-layer IR abstraction; (3) adaptive multi-core cache coherency addressing scalability beyond 8 cores; and (4) security and privacy-preserving compute, including FHE-compatible processors and RDMA packet processing via extended instructions.
Monte Cimone (2022) demonstrated a multi-node RISC-V cluster based on the SiFive U740 SoC running a full HPC software stack. A 64-bit RISC-V Processor Optimized for HPC targeting a 180nm ASIC implementation was documented in India in 2025. Shandong University filed a RISC-V Server CPU UEFI Firmware Boot Method in 2024 (CN). The New Ara vector processor (2022 literature) achieved FPU utilization greater than 98.5% at over 1 GHz.
According to the CONTENT, vector extension IP is bifurcating between open academic implementations (the Ara/New Ara academic lineage) and proprietary commercial implementations such as Alibaba’s RVV SoC patent (2024, US). Commercial assignees are filing narrow but strategically placed claims around accelerator-to-vector-core coupling interfaces, which could constrain third-party integrators. The CONTENT recommends targeted claim mapping before committing to RVV-based SoC designs.