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September 15, 2021
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Wednesday, September 15 • 7:25am - 7:45am
RISC-V Vector Sail Model and Test Generation - Yifei Zhu & Xi Wang, RIOS Lab & Tsinghua University

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RISC-V Vector (RVV) is an instruction-set architecture extension that provides RISC-V vectorization support. It enables RISC-V processors to process data arrays, alongside traditional scalar operations in the SIMD manner to enhance the performance via data-level parallelism. However, the complexity of vector processing units can lead to the ambiguity of the vector specification. As such, a new Domain-Specific Language (DSL) is desired to build a golden reference model that accurately describes the behavior of the instructions and registers of a given ISA. Driven by this motivation, RIOS Lab designs the golden model of RVV in Sail, which is a DSL designed for expressing the ISA semantics of distinct computer architectures. This model will be released by the end of this year as a part of the standard RVV release of RISC-V foundation. In addition, as it is necessary to verify the behavior of RVV instructions implemented in our Sail model, RIOS Lab will also introduce an open-source random architectural test generator named “Talon”. Talon is portable with the RISCOF infrastructures and the generated instruction patterns are configurable via YAML. This presentation will show the design of the RVV Sail model and current progress. It will also demonstrate our random test generator as well as the new characteristics in future work. This proposal yields a golden model of RVV program executions and takes an active role in supporting the growth and evolution of the RISC-V ecosystem.

Speakers
avatar for Xi Wang

Xi Wang

Postodoctral Researcher, RIOS Lab & Tsinghua University
Dr. Xi Wang is a Postdoctoral Researcher of the RISC-V International Open Source Laboratory (RIOS Lab), Tsinghua University and advised by Dr. David A. Patterson and Dr. Zhangxi Tan. Dr. Wang received his M.S. and Ph.D. degrees in Computer Science, in 2016 and 2020, respectively... Read More →
avatar for Yifei Zhu

Yifei Zhu

a first-year bachlor-straight-to-doctorate student, RIOS at TBSI
Yifei Zhu is a bachlor-straight-to-doctorate student of the RISC-V International Open Source Laboratory (RIOS Lab), Tsinghua University and advised by Dr. David A. Patterson and Dr. Zhangxi Tan. Yifei Zhu received her bachlor degree in Communication engineering, in 2020, from University... Read More →



Wednesday September 15, 2021 7:25am - 7:45am PDT
Virtual
  Session
  • Slides Attached Yes