Circuit design fitting

A non-transitory machine-readable medium having stored thereon information representing instructions that, when executed by a processor, cause the processor to perform operations comprising:

• identifying overflow conditions from a first placement of a mapped circuit design in association with an integrated circuit;
• marking circuit blocks associated with the integrated circuit with control set identifiers;
• implementing a second placement for a first circuit object from a list of sequential circuit objects generated responsive at least in part to the overflow conditions, wherein the first circuit object is associated with a first control set identifier, wherein the second placement comprises:
• locating a site for placement of the first circuit object, wherein the site is associated with a first circuit resource block, and the first circuit resource block is associated with circuit resource blocks of the integrated circuit;
• categorizing nearest neighbor circuit resource blocks of the first circuit resource block in response to statuses, wherein the statuses include categories of control set identifiers and an unused category;
• and
• placing, with a placer operative with the processor, the first circuit object in a nearest neighbor of the nearest neighbor circuit resource blocks of the first circuit resource block for the second placement, wherein the nearest neighbor is associated with a categorization from the act of categorizing including the first control set identifier of the first circuit object.

A method for fitting a circuit design having been synthesized, comprising:

• obtaining a mapped design for the circuit design;
• performing a first placement of the mapped design in association with an integrated circuit;
• marking circuit blocks associated with the integrated circuit with control set identifiers;
• selecting a first circuit object from a list of the sequential circuit objects, wherein the first circuit object is associated with a first control set identifier;
• locating a site for placement of the first circuit object, wherein the site is associated with a first circuit resource block, and the first circuit resource block is associated with circuit resource blocks of the integrated circuit;
• acquiring nearest neighbor circuit resource blocks with respect to the first circuit resource block;
• categorizing the nearest neighbor circuit resource blocks of the first circuit resource block in response to statuses;
• placing, with a placer operating in a computer, the first circuit object in a nearest neighbor of the nearest neighbor circuit resource blocks of the first circuit resource block for a second placement, wherein the nearest neighbor is associated therewith a categorization from the act of categorizing including the first control set identifier of the first circuit object.