Design compiler keep boundary

  • What are Gtech cells?

    Once it has all logical Boolean representation loaded, the tool maps logic with a technology-independent cell called the Gtech cell.
    During elaboration, the tool checks whether the design is unique, if not, it stops the tool.
    Once the design becomes unique, the tool checks for unresolved references in the design..

  • What is boundary optimization?

    Boundary optimization is a technique used while logic synthesis for proper area, timing and power optimization.
    Boundary optimization may result in about 5-10% of standard cell area reduction and 2-5% of timing improvement..

  • Why do we need synthesis in VLSI? Synthesis is a critical step for chip designers because it allows them to visualise how the design will appear after manufacture.
    Only the designer may report and validate all factors in advance, including area, time, and power.
Jun 17, 2020Hi Sharas, The boundary optimisation is nothing but the optimisation is doing across bounmdary. in the realisation of the each module the compiler will put  Boiundary Optimization in synthesis - Forum for ElectronicsWant formality run and keep boundary optimization turned on in What are the methods for reducing area? - Forum for ElectronicsSynopsys Design Compiler - Ungroup Synthesized DesignsMore results from www.edaboard.com
If the designer knows exactly how to partition the design, boundary optimization may be turned off. In this mode, Synopsys will optimize all individual 
With boundary optimization turned on, the compiler with merge all components into one file and perform optimization across all boundaries inside the top-level  

How do I run design compiler?

Design Compiler can be run using a menu-driven GUI (design-analyzer) or from a text- only command prompt (dc-shell).
With design-analyzer, the user selects menu commands that are, in turn, sent to Design Compiler.
With dc-shell, the user inputs commands directly to Design Compiler (text only).

How does design compiler restructure a design?

When you run this command sequence, Design Compiler first flattens the logic, then goes back and restructures the design by sharing logic off the critical path.
For high-performance designs that have significantly tight timing constraints, you can invoke a single DC Ultra command, compile_ultra, for better quality of results (QoR).

How does direct design compiler perform Boundary optimization?

Direct Design Compiler to perform optimization across hierarchical boundaries (boundary optimization) by using one of the following commands:

  • If you enable boundary optimization
  • Design Compiler propagates constants
  • unconnected pins
  • and complement information.

    • Why does design compiler give priority to design rule constraints?

    The goal of Design Compiler is to meet all constraints.
    However, by default, it gives precedence to design rule constraints because design rule constraints are functional requirements for designs.
    Using the default priority, Design Compiler fixes design rule violations even at the expense of violating your delay or area constraints.


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