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What is the difference between E and Vera

Raviram80

Hi All,

 Could you please explain the difference between specman E and Vera

Thanks,

Ravi

  • StephenH

    This is a tiny question with no serious short answer, it is also likely to start a flame war if you ask it in a public forum!

    Both are high-level languages for writing testbenches. Specman e was created from scratch as a verification language, and has many advanced features that make data modelling and randomisation very easy. Specman is still very widely used and is actively developed by Cadence.

    In contrast, Vera is a traditional object-oriented language, lacking some of the more advanced features that e has. It is also pretty much dead, having been widely replaced by Specman and SystemVerilog.

    Specman code integrates tightly into Cadence's multi-language simulator kernel, whereas Vera runs as a PLI-based add-on.

  • teamspecman
    There is one more very important difference: the e language is an IEEE standard, with an active Working Group: http://www.eda.org/twiki/bin/view.cgi/P1647/WebHome Consequently, the e language has a healthy ecosystem of EDA tool support (including early adopter support in Synopsys' VCS), verification IP, training providers, and service providers. In contrast, Vera is a language that is proprietary to Synopsys, and is only supported by them and a declining handful of affiliated service houses.

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