Merge/Split Commands (Design Partitions Window) (Shortcut Menu)

 

You access these commands by right-clicking inside the Design Partitions window, pointing to Advanced, and then clicking Merge or Split.

 

You can use the Merge command to combine hierarchical partitions into a single partition, as long as they have the same immediate parent partition. Merging partitions allows for some additional optimizations for partition I/O ports that connect between or feed more than one of the merged hierarchical design blocks.

Merge command

Allows you to merge one or more design partitions into a single partition. You can merge only partitions that share the same immediate parent partition. For example, in the following hierarchy:

// top

       //  +-- foo:F

       //          +-- sub_foo:X

       //

       //  +-- bar:B

       //          +-- sub_bar:Y

 

You can merge foo:F and bar:B because they share top as their immediate parent partition. You cannot merge sub_foo:X and sub_bar:Y unless you first merge  foo:F and bar:B, so that sub_foo:X and sub_bar:Y share the same parent partition.

When you merge design partitions, multi_hier_[integer] appears as single entry for the merged partitions in the Partition Name column. The names of the merged partitions appear in the Compilation Hierarchy Path column. You can rename the merged partition name with options in the Design Partitions window.

 

Note: You can use the Split command to reverse the merge operation.

 

Split Command

Allows you to reverse the merge operation for partitions previously merged in a design. When you merge design partitions, multi_hier_[integer] appears as single entry for the merged partitions in the Partition Name column in the Design Partitions window. The names of the merged partitions appear in the Compilation Hierarchy Path column. After you split merged partitions, each partitions appears as a single entry in the Design Partitions window.

 

For a more detailed discussion of partition guidelines, see the Best Practices for Incremental Compilation Partitions and Floorplan Assignments chapter in the Quartus II Handbook, Volume 1, which is available from the Literature section of the Altera website.

 

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