iccshell setattribute U14 rporientation N FS For more information see Changing

Iccshell setattribute u14 rporientation n fs for more

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icc_shell> set_attribute U14 rp_orientation {N FS} For more information, see “Changing the Attributes of Relative Placement Cells” on page 12-76 . Adding Relative Placement Groups Hierarchical relative placement allows relative placement groups to be embedded within other relative placement groups. The embedded groups then are handled similarly to leaf cells. You can use hierarchical relative placement to simplify the expression of relative placement constraints. With hierarchical relative placement, you do not need to provide relative placement information multiple times for a recurring pattern. There are two methods for adding a relative placement group to a hierarchical group: Include the group If the relative placement group to be added is in the same design as its parent group, it is an included group. You can include groups in either flat or hierarchical designs. See “Including Relative Placement Groups” on page 12-27 . Instantiate the group If the relative placement group to be added is in an instance of a subdesign of its parent group, it is an instantiated group. You can instantiate groups only in hierarchical designs. See “Instantiating Relative Placement Groups” on page 12-29 . The following sections describe these aspects of hierarchical relative placement groups: Benefits of Hierarchical Relative Placement Groups Including Relative Placement Groups Instantiating Relative Placement Groups Using Hierarchical Relative Placement for Straddling Using Hierarchical Relative Placement for Compression Effect of Ungrouping on Hierarchical Relative Placement Effect of Uniquifying on Hierarchical Relative Placement
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Chapter 12: Physical Datapath With Relative Placement Adding Objects to a Group 12-27 IC Compiler Implementation User Guide Version D-2010.03-SP2 Benefits of Hierarchical Relative Placement Groups Using hierarchical relative placement provides these benefits: Allows you to organize your relative placement in a manner that is easier to maintain and understand. For example, you can create the relative placement group to parallel your Verilog or VHDL organization. Allows reuse of a repeating placement pattern, such as an adder. Can reduce the number of lines of relative placement information you need to write. Allows integrating blocks. Provides flexibility for the configuration you want. Including Relative Placement Groups To include relative placement groups in the relative placement hierarchy browser (Placement > New RP Hierarchy View), 1. Select the group you want to add to in the left pane. 2. Select the Grid tab in the right pane. 3. Select the desired location in the grid view. To include relative placement groups, make sure that the selected location is empty.
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