Xilinx 8.2i manual Set set partition preserve property

Models: 8.2i

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Chapter 3: Tcl

R

set (set partition preserve property)

The partition set command assigns the partition preserve property and value for the specified partition.

%partition set <partition> preserve <value>

partition is the name of the Xilinx Tcl command.

set is the name of the partition subcommand.

partition specifies the full hierarchical name of the partition or the collection you wish to set the property for. A collection is specified using the dollar-sign syntax ($) with the name of the collection variable.

preserve is the property used to control the level of changes that can be made to the implementation of partitions that have not been re-implemented. Values for the preserve property are:

preserve {routingplacementsynthesisinherit}

routing -- Most data preservation comes from routing. When the property value is set to routing, all implementation data is preserved, including synthesis, packing, placement, and routing. Routing is the default property value.

placement --This is the second-highest property value for the preserve property. With this setting, synthesis, packing, and placement are preserved. Routing is only re- implemented if another partition requires the resources.

synthesis -- This is the lowest-level preserve property value because only the netlist, which contains synthesis information, is preserved. With this setting, packing, placement and routing are open for re-implementation; however, placement and routing are only re-implemented if another partition requires the resources.

inherit -- This value specifies that the partition inherits the same preserve property value as its parent partition. Inherit is the default setting for all child partitions. This setting is not available for top-level partitions.

Example:

% partition set /stopwatch/Inst_dcm1 preserve synthesis

 

 

Description:

In this example, the partition set command is used to specify the

 

preserve property for the Inst_dcm1 partition. The preserve value is

 

set to synthesis, which means packing, placement, and routing will

 

be re-implemented.

Tcl Return:

The value of the previous preserve property.

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Xilinx 8.2i manual Set set partition preserve property