UVM is Now IEEE1800.2-2020 Standard A 2020 Adoption Primer.pdf

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UVM is Now IEEE1800.2-2020 Standard:

A 2020 1.0/1.1 Adoption Primer

Roman Wang

MetaX Integrated Circuits (Shanghai) Co., Ltd.

沐曦集成电路（上海）有限公司

Roman.Wang@metax-tech.com

Abstract- Universal Verification Methodology (UVM) has been the most mainstream verification

methodology and a tremendous success throughout the verification industry since the first release of

UVM (UVM-EA) in 2010. Moving Forward, the Accellera UVM Working Group has completed work on

its UVM-2020 1.1 reference implementation which is aligned with the latest IEEE 1800.2-2020 Standard

[1] for UVM in 10 years later. Both IEEE 1800.2-2020 Standard and a new library implementation (UVM

2020 v1.0) have been released in Feb. 2021. This paper will not only share notable changes in UVM 2020

v1.0/1.1, but also point out why the changes were made and how do the changes affect the way we write

UVM test benches and debug. It is to help UVM end users to better understand the differences between

UVM 2017 and UVM 2020 and estimate effort/path to migrate to UVM 2020. This paper will be a UVM

2020 primer to all verification engineers (from those just starting with UVM [2] to those with years of

experience) and they will gain new knowledge to improve verification quality for sure.

Keywords

- UVM 2020, IEEE 1800.2 2020 1.0/1.1

I. HAPPY BIRTHDAY UVM

A. Motivation

In 2009, The Accellera formed Verification IP technical subcommittee (VIP-TSC), its first job is developing

VMM and OVM interoperability and to make them work together. The UVM standard (Version 1.0) was first

born by Accellera 10 years ago in February. The adoption trends for various base-class library and methodology

standards are shown in Figure 1 [3]. The Accellera UVM is still the predominant standard that has been adopted

to create IC/ASIC testbenches, and it continues to grow. The big design houses have already built extensive

libraries on top of this, so it proves UVM to be a truly successful standard. With great collaborations of UVM

working group, UVM-2020 1.0 reference implementation and the IEEE standard are now available for

download at no charge under the Accellera-sponsored IEEE Get Program in December 16, 2020.

Fig. 1 The adoption trends for various base-class libraries and methodology standards

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The changes in the 2020 LRM are primarily fixes to a small number of API which were erroneously specified in

the earlier version in 2017. Along with implementing these LRM updates, the new reference implementation

addresses some errata that have existed in the UVM-1.2 implementation. The new library implementation

provides the latest UVM standard API along with some additional debug APIs that provide a more cohesive

package with the 1800.2-2020 API. The errata fix better align the implementation behavior with the IEEE LRM

documentation. The UVM releases in specific types of numbers are shown in Fig 2 and Fig 3.

Fig. 2 UVM Release in classes and files numbers based on cloc-1.88.pl

Fig. 3 UVM Release in code and comment numbers based on cloc-1.88.pl

B. Paper Organization

Section II attempts to dissect notable changes between IEEE 1800.2 2020-1.0 and IEEE 1800.2 2017 (plus

UVM 1.2) release. Section III presents the migration suggestions. Finally, this paper concludes in Section IV by

sharing how we benefit from this paper.