Abstract: Techniques for noise impact on function (NIOF) reduction for an integrated circuit (IC) design are described herein. An aspect includes receiving a list of victim nets in which NIOF failures are present in an IC design. Another aspect includes attempting NIOF correction in each victim net of the list of victim nets. Another aspect includes, based on a failure of a NIOF correction in at least one victim net of the list of victim nets, saving the at least one victim net to a wire promote/demote list. Another aspect includes updating the list of victim nets based on the NIOF correction. Another aspect includes, based on determining that the updated list of victim nets is empty, promoting or demoting the at least one victim net from the wire promote/demote list in the IC design.

Abstract: Techniques for net routing for an integrated circuit (IC) design are described herein. An aspect includes receiving a netlist corresponding to a net in an IC design. Another aspect includes identifying intermediate logic in the net, wherein the intermediate logic is connected between a source and a sink of the net, and wherein the sink is located downstream from the source in the IC design. Another aspect includes hiding the intermediate logic from the netlist. Another aspect includes creating a global route in the IC design between the source and the sink of the net without the intermediate logic. Another aspect includes restoring the intermediate logic to the netlist. Another aspect includes placing the intermediate logic along the global route.

Abstract: Techniques for noise impact on function (NIOF) reduction for an integrated circuit (IC) design are described herein. An aspect includes receiving a list of victim nets in which NIOF failures are present in an IC design. Another aspect includes attempting NIOF correction in each victim net of the list of victim nets. Another aspect includes, based on a failure of a NIOF correction in at least one victim net of the list of victim nets, saving the at least one victim net to a wire promote/demote list. Another aspect includes updating the list of victim nets based on the NIOF correction. Another aspect includes, based on determining that the updated list of victim nets is empty, promoting or demoting the at least one victim net from the wire promote/demote list in the IC design.

Abstract: Techniques for net routing for an integrated circuit (IC) design are described herein. An aspect includes receiving a netlist corresponding to a net in an IC design. Another aspect includes identifying intermediate logic in the net, wherein the intermediate logic is connected between a source and a sink of the net, and wherein the sink is located downstream from the source in the IC design. Another aspect includes hiding the intermediate logic from the netlist. Another aspect includes creating a global route in the IC design between the source and the sink of the net without the intermediate logic. Another aspect includes restoring the intermediate logic to the netlist. Another aspect includes placing the intermediate logic along the global route.

Abstract: Methods, systems and computer program products for improved placement of a clock gating latch are provided. Aspects include identifying a clock gating latch that is designated to control a local clock buffer. Aspects also include determining a plurality of data latches that are designated to be controlled by the local clock buffer. Aspects also include determining positions of the plurality of data latches within a layout. Aspects also include determining a position of the clock gating latch within the layout based on the positions of the plurality of data latches within the layout.

Abstract: Methods, systems and computer program products for improved placement of a clock gating latch are provided. Aspects include identifying a clock gating latch that is designated to control a local clock buffer. Aspects also include determining a plurality of data latches that are designated to be controlled by the local clock buffer. Aspects also include determining positions of the plurality of data latches within a layout. Aspects also include determining a position of the clock gating latch within the layout based on the positions of the plurality of data latches within the layout.

Abstract: Techniques for logic partition reporting for an integrated circuit (IC) design are described herein. An aspect includes generating a physical domain representation of an IC design based on a logic domain representation that includes a plurality of logic partitions, the physical domain representation including a plurality of logic clusters, each corresponding to a respective logic partition. Another aspect includes assigning a logic partition identifier corresponding to a logic partition of the plurality of logic partitions to each IC element in the physical domain representation. Another aspect includes assigning a pin name to each of the plurality of pins corresponding to the plurality of IC elements, wherein a pin name is derived based on the logic partition identifier of the IC element associated with the pin. Another aspect includes generating a timing report for a logic cluster based on the logic partition identifiers and the pin names.

Abstract: Techniques for an IC design include placing latches between a source and one or more sinks in the IC design, and performing an iterative process for maximizing slack on one or more input nets and one or more output nets for each of the latches, minimizing an absolute difference of the slack. The IC design includes optimizing routing for the latches and placing a clock gating latch in the IC design designated to control a LCB of LCBs. The IC design includes placing LCB logic in the IC design to control a required number of the LCBs, and placing a local clock buffer controller in the IC design in proximity to the positions of the latches.

Abstract: Techniques for parallel power down processing of an integrated circuit (IC) design are described herein. An aspect includes receiving IC design information comprising a plurality of IC elements. Another aspect includes identifying a plurality of timing endpoints in the IC design information. Another aspect includes determining a plurality of nets, each net comprising a respective subset of the plurality of IC elements, based on the identified plurality of timing endpoints. Another aspect includes performing power down processing of net drivers in the plurality of nets, wherein the power down processing of at least a subset of the plurality of nets is performed in parallel.

Abstract: Techniques for logic partition identifiers for an integrated circuit (IC) design are described herein. An aspect includes receiving a logic domain representation of an IC design comprising a plurality of logic partitions each comprising a respective plurality of IC elements. Another aspect includes generating a physical domain representation of the IC design based on the logic domain representation comprising a plurality of logic clusters each corresponding to a respective logic partition, wherein each of the plurality of logic clusters comprises a respective plurality of IC elements. Another aspect includes assigning a logic partition identifier to each IC element in the physical domain representation, wherein the logic partition identifier of an IC element corresponds to a logic partition. Another aspect includes determining timing information for a logic partition based on the logic partition identifiers of the plurality of IC elements of a logic cluster associated with the logic partition.

Abstract: Techniques for latches include ordering latches by connectivity from a source to sinks. An iterative process is performed which includes selecting a selected latch in the connectivity, drawing a bounding box around the selected latch to encompass input nets and output nets, and using a two-dimensional optimizer to find a new placement location for selected latch by solving for optimization criteria. The optimization criteria includes maximizing slack on the input and output nets of the selected latch, minimizing an absolute difference of the slack between the input output nets, and identifying the new placement location within the bounding box that balances maximizing the slack on input and output nets versus minimizing the absolute difference of the slack between input nets and output nets. The current location of the selected latch is updated between the source and sinks to be the new placement location identified in the bounding box.

Abstract: A system and method involves partitioning a design of an integrated circuit into two or more hierarchical levels. A lowest level includes macros and a higher level includes some or all of the macros. Each of the macros includes two or more components. A macro timing model corresponding with each of the macros indicates a delay through the macro. The macro timing model corresponding with ones of the macros that are part of the higher level are loaded to perform higher-level timing analysis, which indicates a delay through the ones of the macros that are part of the higher level. Modified macro timing models corresponding with one or more of the macros are generated, and only the modified macro timing models associated with the macros that are part of the higher level modify corresponding loaded macro timing models to continue the higher-level timing analysis.

Abstract: A system and method for correcting wiring congestion in a placed and partially or fully globally-routed VLSI chip design while avoiding adding new timing or electrical violations or other design constraints. Globally-congested areas are identified along with determining terminated and non-terminated wires in the congested areas. The process includes optimizing the identified congestion areas, incrementally rerouting affected nets, testing the resultant design legality and congestion metrics, and committing or reversing the optimizations and reroutings. The optimizations further includes the movement of logic cells and decomposition, recomposition or any other modification of logic cell structures (possibly combined with cell movement) to move terminated wires to less congested grid edges, rearrangement of commutative connections within or between cells, or addition of buffers to cause reroutes of feedthrough wires.