normal distribution in Verilog-A

[crossroad]

In Verilog-A, normal distribution is expressed as $dist_normal(seed,mean, standard variation)
what is "seed" mean??
thanks for the answer

 

[tsinghua]

The random generator is a pseudorandom generator.
Following excerpt is from the veriloga language manual.

For each system function, the seed parameter is an in-out parameter; that is, a value is
passed to the function and a different value is returned. The system functions will always
return the same value given the same seed. This facilitates debugging by making the
operation of the system repeatable. The argument for the seed parameter should be an
integer variable that is initialized by the user and only updated by the system function.
This will ensure that the desired distribution is achieved.