<MODIFYGROUP 
"MODIFY GROUP

Changes the soft group constraints or the region within which all of the cells in a cell group lie. You can add cells to, and delete cells from, existing groups.


Syntax

MOD*IFY G*ROUP 
groupID 	
[ [S*OFT 
[ MAXH*ALFMETER value 		
| [MAXX value][MAXY value] ]] 	  
[R*EGION pt pt] 	  
[A*DDCELL cellID...  
[C*HANGEGROUPOK]] 	  
[D*ELETECELL cellID...] ] | 	
[ [ADDSEL*ECTEDSET] | 	  
[DELSEL*ECTEDSET]]; ;


Arguments

groupID
Specifies by group name or by selecting any cell in the group.

SOFT
Changes soft group constraints (MAXHALF-PERIMETER, MAXX, MAXY). When you select SOFT, the current value is shown, and the database value is shown in parentheses. This helps during multiple entries.

MAXHALFPERIMETER value
The smallest bounding box containing all the cells in the group will have two adjacent sides no larger than MAXHALFPERIMETER.

MAXX value, MAXY value
The smallest bounding box containing all the cells in the group has X displacement no greater than MAXX and Y displacement no greater than MAXY.

REGION pt pt
The region within which all cells in the group lie is changed to a rectangle defined by the two specified corner points.

ADDCELL cellID...
Adds cells to the group. Specified cells cannot also be deleted cells. Cover cells cannot be added.

CHANGEGROUPOK
Allows cells to change the owning group in the ADDCELL option. The default is false, meaning the cell with an owning group other than the specified group cannot have a cell added.

DELETECELL cellID...
Deletes cells from the group. Specified cells cannot also be added cells. Cover cells cannot be deleted.

ADDSELECTEDSET 
Add the selected set of cells to the existing group.

DELSELECTEDSET 
Delete the selected set of cells to the existing group.


Description

MODIFY GROUP can be used at any time after INITIALIZE FLOORPLAN is run and before global routing is started.

When you select a group, all the placed cells in the group are highlighted. The SOFT option highlights the bounding box of all the placed cells in the group. When you enter MAXHALFPERIMETER, MAXX, or MAXY, the system displays the current value of the attribute.

If you enter the REGION option, the bounding box of the current region is highlighted. An expandable box is displayed with one corner at the first point you select, and the diagonally opposite corner attaches to the pointer. When you select the second point, the rectangle defined by the two selected corner points is highlighted. 

The area of the rectangle is checked against the minimum area required for the group. If the new area is not large enough to hold all the cells in the group, MODIFY GROUP issues a warning message but performs the operation. When you enter a new region for the group, any non-COVER cells in the group that are placed out of the new region are unplaced.

Cells can also be designated using selected set when adding or removing from the group. 
"

	<Type QHELP>
	<Header "Modify Group Command Help">
>
