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 Verification is No Simulation

Archive for July, 2009

The Language versus the Methodology

Tuesday, July 7th, 2009

I’ve been around simulation and synthesis languages for a while; back when you needed an NDA to see the Verilog LRM, and again with SUPERLOG, the predecessor to SystemVerilog.  It’s easy for those like me to get caught up in the features of the language and forget that any programming language is just a tool. With any technology, people pick the tools they think will get the job finished most effectively. Tools evolve to meet the challenges and requirements of their users. Verilog and VHDL have clearly evolved to become the prevailing languages for hardware design.

But before the language wars came the methodology wars. At the time when Verilog and VHDL were being introduced in the late 1980s, most hardware design was by schematic gale-level entry. We would come to our clients with our simulators and synthesis tools and try to change their design methodology by writing RTL. They would bring their best engineers to compete with our tools – and the engineer would always win by producing a design with better area and timing! However, once the productivity of synthesizing large designs with practical quality of results prevailed over the manual effort, the methodology shift was an easier sell.

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