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Forums > Functional Verification > SystemVerilog

Subject: Simple question about $display
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nnxx
Posts: 9
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4/23/2008 8:37 AM  
Hello experts, Here's something I just can't figure out, but might be trivial for someone out there ... If I define a global as a hierarchical path like so : `define HIER_PATH Itop.I1.I2.I3 How can I use $display (or any alternative) to print the value of `HIER_PATH in a message. I'm aware of %m and %M, but they don't apply here. Thanks!
tpylant
Posts: 87
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4/23/2008 1:00 PM  
As you stated, the %m is the only way I can think of. You would need to put a function in the module represented by I3 and have it display the value of %m.

You might also want to post this question to the Simulation Forum and perhaps someone over there might have something more elegant, perhaps using VPI.

Tim
TAM
Posts: 56
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4/23/2008 1:43 PM  
If you are using SystemVerilog, there is a new macro directive `" that allows you to build a string inside a macro. The following worked in my little testcase.

`define HIER_PATH Itop.I1.I2.I3
`define disp(hp) `"hp`"
initial $display(`disp(`HIER_PATH));

I had to use the `" in a macro, I couldn't use it directly in the $display statement. It seems as if it is only legal in a macro, not in the actual Verilog text.
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Forums > Functional Verification > SystemVerilog > Simple question about $display


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