Non-Rectangle DIEAREA support

[matanco1]

Hi,

As it seems the placer isn't supporting non-rectangle DIEAREA as the cells gets out of the boundary of the DIEAREA.

[limbo018]

Do you have any cases with non-rectangle DIEAREA to share? We can see whether it is easy to support this.

[matanco1]

Do you have any cases with non-rectangle DIEAREA to share? We can see whether it is easy to support this.

Sure, you can just set the DIEAREA as a set of coordinates, here's an example:

DIEAREA ( 1680000 1010000 ) ( 110000 1010000 )
        ( 110000 2200000 ) ( 0 2200000 )
        ( 0 0 ) ( 1680000 0 ) ;

It'll create an L shape:

 ----
|    |
|    |___
|        |
|________|

[limbo018]

Thanks. How will the ROWs be defined? Are they sure to be inside the rectilinear region defined by the DIEAREA?

[matanco1]

Thanks. How will the ROWs be defined? Are they sure to be inside the rectilinear region defined by the DIEAREA?

Actually, I can't tell, as I'm using cadence's Innovus to extract the DEF and I don't know the behavior of the tool. I'll try and check it out!

[matanco1]

Thanks. How will the ROWs be defined? Are they sure to be inside the rectilinear region defined by the DIEAREA?

After checking - yes, they are sure to be inside the rectilinear region defined by the DIEAREA!

[limbo018]

Thank you for the information. I will think about how to add this feature.

[limbo018]

The latest commit (4a731fa) in develop branch has added support to non-rectangular die area.