Declaration, Initialization and shifting real type arrays in VerilogAMS

RFStuff 1 month ago

Dear All,

I am trying to declare a real type array like:- real arr[4:0]={1,2,3,0}

Also, I tried to shift the array as arr[4:0]={arr[4:3],1.5}.

Both gives me error in verilogAMS. How we can achieve the above ? what is the right syntax to do ?

Kind Regards

Andrew Beckett 1 month ago

This is (as far as I know) not possible as part of the Verilog-AMS LRM. It is possible with SystemVerilog (albeit your examples have the wrong width - they are 5 bits wide and the top has 4 literal values; the bottom example syntax is slightly wrong even with SystemVerilog):

real arr[3:0]={1,2,3,0};

initial begin
arr={arr[3:2],1.5,2.0};
$strobe(arr[3]," ",arr[2]," ",arr[1]," ",arr[0]);
end

Andrew
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RFStuff 1 month ago in reply to Andrew Beckett

Thanks Andrew.

well, I will write in SV. However, I would like to use also $table_model(), for reading data from a file and assigning it to the array.

Is there any equivalent of $table_model in SV ?
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Andrew Beckett 1 month ago in reply to RFStuff

You can use $table_model in Cadence SystemVerilog simulators (both the old INCISIVE and XCELIUM) by passing -rnm_tech to the irun/xrun command line. See this article.

Andrew
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RFStuff 1 month ago in reply to Andrew Beckett

Dear Andrew,

Thanks a lot. But, is it possible to add -rnm_tech option while firing the AMS simulation from ADE instead by the command "unix% xrun filename.sv -rnm_tech".
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Andrew Beckett 1 month ago in reply to RFStuff

Yes. On Simulation->Options->AMS Simulator, on the Main tab, go to the bottom, and then there's the "Additional Arguments" button. On the form that then appears, add an additional xrun argument of -rnm_tech - that should do it.

Andrew
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Declaration, Initialization and shifting real type arrays in VerilogAMS

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