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What's the difference between -seed and -svseed in irun?

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There are two options to control random seed when using irun: -seed, -svseed.

It seems that these two options is doing the same thing: set a random seed to RNG. And I tried many times, I can't find difference between these two options. Both can be used to control Verilog/SystemVerilog randomization, for example:

-seed 123

-svseed 123

-seed random

-svseed random

So, what's the difference between these two options?

Thanks!

Parents

  •  Hi, Hannes:

    I know these descriptions given by irun, but I'm still not clear about what's the basic difference between "seed value for SystemVerilog" and "SystemVerilog default RNG seed". It seems that both "-seed random" and "-svseed random" can work when do simulation. Right?

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  •  Hi, Hannes:

    I know these descriptions given by irun, but I'm still not clear about what's the basic difference between "seed value for SystemVerilog" and "SystemVerilog default RNG seed". It seems that both "-seed random" and "-svseed random" can work when do simulation. Right?

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