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A recent customer blog interview with Geoffrey Faurie from ST Microelectronics and Richard Goering from Cadence was posted on Cadence.com with the title: "Is e or SystemVerilog Best for Constrained-Random Verification?" This blog post has received much positive feedback from other Specman/e and SystemVerilog users. Whether you are a Specman/e and/or SystemVerilog user, this blog provides a good balance of the differentiators of each language. Geoffrey used an analogy of comparing e to a screwdriver and SystemVerilog to a knife, stating that one can definitely drive a screw with a knife but it will take him/her much longer than with a screwdriver. Geoffrey also stated that he noticed a 30% productivity drop when his team switched from e to SystemVerilog. Wow!!!.....Many other Specman/e users have chimed in and supported Geoffrey's opinion.
Full Blog interview : Is e or SystemVerilog Best for Constrained-Random Verification?
Check out some of comments from other Specman/e and SystemVerilog users who read Geoffrey's blog:
In the past couple of months, Cadence has posted two other customer interview blogs (links below) highlighting the effectiveness of Specman constrained-random verification for complex SoCs. These blog posts showed how Raimund Soenning from Fujitsu Semiconductor and Sarmad Dahir from Ericsson have also transitioned from traditional verification methods to a Specman-based, constrained-random, verification approach to improve their overall verification productivity.
In the interview with Richard Goering, Soenning was asked "Since constrained-random test generation is now available with SystemVerilog, why use the Specman e language?" Soenning responded "Because e has been around for 10 years and is a much more mature language, and in an earlier comparison it appeared to use fewer lines of code than SystemVerilog...Why go for, in our view, the second best solution, when we can go for the best solution?"
"Constrained-random testing is much more efficient than the old directed test approach," Dahir said. "Random testing makes things easier, because you won't have to target every possible scenario." This translates into a time savings -- perhaps 30 percent for the overall verification process. In the old directed test environment, Dahir said, it took 1-2 weeks to rewrite testbenches and resume verification after new RTL came in. With Specman, this only takes a couple of days.
In case you missed these past interviews, you can still read them:
We would like to hear your feedback too on the differences and the benefits of using e and/or SystemVerilog. Feel free to comment.
Kishore Karnane (Team Specman)
When i try to compare bothe the hvls like specman and system verilog, its easier to learn e language when compare to sv. So in specman automatically every field is randomize so no need to write like $random explicitly. In specman e every constraint is easy to understand and its simply like english language.
- Mahesh.s@sicon tech
e is one of the best language to generate random values, this the best verification language.