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How to report cells from window x1 y1 x2 y2

gpremala over 12 years ago

Hi All,

I want write a script to get below things with dbGet commands.

How do I give coordinates to dbGet command for the following.

I want to get cell count from window x1 y1 x2 y2.

it should report count for sequential, inverter, buffer, other combinational cells with cell name.

I want to get cell count from window x1 y1 x2 y2.

it should report pattern (*AND*) cell count in particular area by giving coordinates.

Thanks,

Gopi Premala

wally1 over 12 years ago

Hi Gopi,
I think the command "dbQuery -area {x1 y1 x2 y2} -objType inst" will help you here. It will return pointers to the instances in the specified area. You can then parse the list to get the cell types, etc.
Brian
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BobD over 12 years ago

I was going to suggest dbQuery as well. For the breakdown by type, have a look at "userReportArea.tcl" in the gifts dir. It might provide a useful example for how to summarize cells by type:

Type Count Area(u^2)
--------------------------------
Standard Cell: 5906 133841.03
Buffers: 193
Inverters: 478
Sequentials: 543
Comb: 4692
Block: 4 366346.56
BlackBox: 0 0.00
IO: 71 850700.00
Area IO: 0 0.00
Sum: 5981 1350887.59
Total: 5981 1350887.59
Die Density = (Standard Cell + Block + Black Box + IO Cell + Area IO Cell) / Die Area
Die Density = 133841.0304 + 366346.562025 + 0 + 850700.0 + 0 / 1558322.095
Die Density = 1350887.59243 / 1558322.095
Die Density = 86.69%
INFO: Die area was found to be rectangular:
Die Area = (Width * Height)
Die Area = (1255.375 * 1241.32)
Die Area = 1558322.095 u^2

Hope this helps,
Bob
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gpremala over 12 years ago

Thank you Brian, for your quick reply.

Here I want to fileter out cell (*AND*).
How do I do with db command.
Thanks,
Gopi Premala
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wally1 over 12 years ago

Hi Gopi, Try the following:
set instPtrs [dbQuery -area {x1 y1 x2 y2}
set cellPtrs [dbGet -v -p $instPtrs.cell.name *AND*]
The -v says omit objects that don't match *AND*. Use -p2 to return the inst pointers instead of the cell pointers.
Brian
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gpremala over 12 years ago

Hi Brian,
Thank you for your help.
Where can i find the documents for db commands and its info.

Gopi Premala
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BobD over 12 years ago

Search for "dbGet" on support.cadence.com and the following is under "New or Changed Features":

http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:DocumentViewer;src=wp;q=ProductInformation/Digital_IC_Design/ApplicationPackages/download/EDI11_DBTCL_slides.pdf

It covers dbGet, dbQuery and other related db access commands.

Hope this helps,
Bob
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