Schematic symbols used for GUI visualization ( .sdb format). Example Setup Script
Calculated as Data Required Time - Data Arrival Time . A positive value (e.g., 0.65 ) means the design meets timing. A negative value indicates a timing violation that must be resolved. 7. Advanced Optimization Techniques
The compile_ultra command now includes an ML engine (enabled via set_app_var ml_optimizer_enabled true ). It analyzes historical synthesis runs to predict which Boolean transformations yield the best Power-Performance-Area (PPA) without exhaustive brute-force searches.
You must select an operating corner (Worst-Case, Best-Case, or Typical) to direct optimization calculations.
Mastering Design Compiler is essential for any digital chip designer or CAD engineer, and the skills you build from this 2021-era foundation will serve you well on any modern version, including the latest DC NXT. synopsys design compiler tutorial 2021
By using compile_ultra in topographical mode (or simply using DC-G's default flow), you provide a floorplan to DC. The tool then performs "virtual routing" to estimate net delays far more accurately. This results in a netlist with timing and area within ~5% of the final placed design, significantly reducing iterations between synthesis and layout.
set_clock_uncertainty -setup 0.050 [get_clocks core_clk] set_clock_uncertainty -hold 0.050 [get_clocks core_clk]
The compile_ultra command unlocks advanced engine capabilities. These include automatic register retiming, aggressive loop unrolling, and macro-architecture optimization.
exit
Optimizing Your RTL-to-GDSII Flow with Synopsys Design Compiler In the world of VLSI, Synopsys Design Compiler
Ensure your shell uses bash or csh to source the DC setup file: source /tools/synopsys/2021/dc/setup/.cshrc_dc
Design Compiler can be run interactively via the command line utility dc_shell , or in batch mode using scripts. The following sequence represents the fundamental script workflow for any standard digital design. 1. Reading the RTL Design
report_constraint -all_violators > ./reports/constraints.rpt Schematic symbols used for GUI visualization (
In 2021, power and test were integral to the synthesis flow. To address low power, Synopsys offers , which is often integrated into DC Graphical.
Libraries needed to resolve references (must include the target library and any RAM/IP macros).
Create a dedicated directory for your synthesis run to house log files and reports.