What's New?

Oct 25 2025, GOF V11.5 Released

• API for fast RTL to RTL LEC, especially designed for AI Verilog generation
• Unmapped keypoint processing enhancement to add time out
• DFT DRC enhancement in CTL model file reading

Jul 21 2025, GOF V11.4 Released

• Scoring method in RTL generation
• GOFAI license support
• Backend script enhancement in GOFECO

May 18 2025, GOF V11.3 Released

• Enhanced the formal engine for code generation
• BDD used to generate logic equation in code generation
• set_check_isolation added to avoid isolation cell removal

Mar 2 2025, GOF V11.2 Released

• Supported hierarchical instance deletion in del_gate API
• Updated write_verilog to remove both instantiation and module definition
• Enhanced DFT DRC after functional ECO

Dec 30 2024, GOF V11.1 Released

• Fixed bug in handling clock gating with Cutpoint Method
• Enhanced SVF multibit support for SVF hidden rules
• More debug capability in processing SVF file
• GOF in Server mode for VS code extension connection

Nov 4 2024, GOF V11.0 Released

• AI Client integrated into GOF platform
• Real time communication built-up between AI Server and Client
• Run option and API created to enable AI in GOF run
• Natural Language ECO operations supported

Jul 11 2024, GOF V10.14 Released

• GOF ECO: Bug fix for metal only ECO spare flop selection
• GOF ECO: Enhancement in set/reset flop conversion for spare flop mapping
• GOF ECO: Bug fix in Innovus script generation
• GOF Link: Customized AI generated support content

May 28 2024, GOF V10.13 Released

• The GOF Debug function component has been spun off into a standalone tool
• Licenses are now available for purchase on a daily basis
• The process of purchasing and delivering licenses to users has been automated

Apr 28 2024, GOF V10.12 Released

• GOF ECO Bug Fix: Resolved GFILLER cell mismatch issue
• GOF ECO Speed Up: Optimized script for Cadence Innovus
• GOF for Large Language Models: Enhanced support for training
• GOF AI Support: Technical support system now available

Feb 19 2024, GOF V10.11 Released

• GOF ECO: Sub-module retargeting ECO to top full netlist
• GOF ECO: Incorporation of Third-party LEC non-equivalence data to guide fix_design
• GOF ECO: Enhancement through user-applied equal inversion information
• GOF ECO: Addressing corner cases by refining sub-module netlist dumping

Jan 2 2024, GOF V10.10 Released

• GOF ECO: Formality help files generation
• GOF ECO: Set reset pin ECO to avoid race condition in DFF flop
• GOF ECO: Fixed clock gating cell bug due to back end optimization
• GOF ECO: ECO run speed optimization

Nov 26 2023, GOF V10.9 Released

• GOF ECO: Pre-layout netlist loading for accurate boundary phase detection
• GOF ECO: Constant propagation enhancement
• GOF ECO: Unmapped hierarchies processing
• GOF Debug: Enhanced counter example display on schematic

Oct 3 2023, GOF V10.8 Released

• GOF ECO: Boundary ports mapping reference
• GOF ECO: A bug fix in RTL compare when IMP has no fanout
• GOF Debug: Hierarchical ports display with logic values
• GOF Debug: GUI ECO and verification enhancement

Aug 15 2023, GOF V10.7 Released

• GOF ECO: Enhanced SVF multibit support
• GOF ECO: Report timing by reading SDF
• GOF ECO: A bug fix in boundary optimization ECO
• GOF ECO: A bug fix in System Verilog parser in RTL Compare

Jun 20 2023, GOF V10.6 Released

• GOF ECO: Report timing API integration
• GOF ECO: From and to option in timing report
• GOF ECO: Flexible through option in timing report
• GOF Debug: GUI schematic enhancement

Apr 24 2023, GOF V10.5 Released

• GOF ECO: Flatten ECO option in fix_design
• GOF DBG: New instance name editable in GUI ECO
• GOF ECO: Bug fix in set_define for verilog library
• GOF ECO: Bug fix in ECO involving backslash instance and wire names
• GOF ECO: Bug fix in unmapped hierarchical ports between REF and IMP
• GOF LEC: Cross module flop merge support

Feb 20 2023, GOF V10.4 Released

• GOF ECO: DFT Design Rule Checker
• GOF ECO: Enhancement in Metal Only ECO in complex cells usage
• GOF ECO: Fixed a bug in repeated running undo_eco
• GOF Debug: Removed port restriction in GUI ECO operation

Jan 15 2023, GOF V10.3 Released

• GOF ECO: Physical aware ECO
• GOF ECO: Bug fix in check_design
• GOF ECO: Enhancement in set_pin_constant/set_net_constant
• GOF Debug: Enhancement in GUI LEC for single point

Nov 26 2022, GOF V10.2 Released

• GOF ECO: SVF support enhancement
• GOF ECO: Optimization in register merger check
• GOF ECO: Bug fix in tie logic handling
• GOF Formal: SEU fault enhancement

Oct 20 2022, GOF V10.1 Released

• Optimization in net phase inversion crossing hierarchies
• API to support flop phase inversion ECO
• Bug fix in metal only ECO spare list generation
• Enhancement in spare gate type constraint

Sep 1 2022, GOF V10.0 Released

• GOF Formal functional component
• SPFM and LFM calculation
• Single fault debug and VCD dump
• Support stuck-at 0, stuck-at 1 and SEU

Jul 25 2022, GOF V9.5 Released

• Verify faults for functional safety
• VCD dump support for verify_faults
• Verify signal state by input sequence
• ECO bug fix in memory tie pins

Mar 14 2022, GOF V9.4 Released

• Bug fix in spare gates mapping
• LEC report enhancement
• GOF LEC has dedicated license
• Bug fix in RTL guided ECO

Jan 31 2022, GOF V9.3 Released

• RTL to Netlist LEC feature
• GOF platform supports three products: ECO, LEC and Debug
• Enhancements on key points mapping
• Bug fixes in RTL guided ECO

Nov 8 2021, GOF V9.2 Released

• Find equal nets feature between RTL and netlist
• GUI mode for finding equal nets
• Enhanced flop phase inversion detection in synthesis
• Synthesize Reference RTL in RTL supplemental ECO

Sep 21 2021, GOF V9.1 Released

• RTL to RTL comparison for supplemental ECO flow
• API rtl_compare added for parallel RTL to RTL comparison
• Liberty files loading cached to speed up the next read
• RTL Patch enhancement in interface connection guidance

Aug 1 2021, GOF V9.0 Released

• RTL Patch ECO to avoid full scale and long synthesis process
• Embedded RTL Patch ECO to have RTL code written in netlist
• Discrete RTL Patch ECO to have flexible stand alone Patch file
• RTL Patch optimization to fully utilize existing logic
• Option in read_library to load library for Reference Netlist only

Jun 28 2021, GOF V8.2 Released

• More optimization on area and timing aware patch generation
• Speeded up large verilog library file reading
• Fixed bug in flop clock/data mixing
• Fixed bug in change_net API
• Enhanced get_loads API

May 3 2021, GOF V8.1 Released

• Enhanced DCT/DCG boundary optimized netlist ECO
• Optimized on patch size when input ports tied to zero
• Fixed bug in output TCL ECO script
• Speeded up read_library in large netlist as black box cells

May 3 2021, GVT V2.1 Released

• Fast display of buffer chains
• Fixed a bug in moving view to hierarchical instance
• Cleared display cache for the correct display
• Fixed instance name display with backslash

Mar 9 2021, GOF V8.0 Released

• Implemented Metal-Configurable Gate Array ECO flow
• Improved run speed significantly in large netlist
• Fixed bug in external synthesis tool support
• Fixed bug in delete port netlist write out

Jan 15 2021, GOF V7.7 Released

• Enhanced GOF shell and GUI to be Non-blocking
• Added save and restore GOF ECO sessions
• Optimized DFT friendly processing
• Fixed bugs in spare cell mapping
• Enhanced ECO retargeting feature

Feb 24 2021, GVT V2.0 Released

• Enhanced net loading display in GofTrace
• Added scan chain tracing feature in GofTrace
• Flops equivalence check on schematic
• Nets equivalence check on schematic

Nov 22 2020, GOF V7.6 Released

• Constant propagation through flop set/reset pin
• Fixed dont use cell command multi-thread mode
• Enhanced multi-bit flops processing

Aug 16 2020, GOF V7.5 Released

• SVF text file support for multibit
• Fixed bug in latch processing
• Fixed bugs in GUI ECO

Jun 23 2020, GOF V7.4 Released

• Design Ware instances remapping to reduce ECO size
• Enhanced net loading display in GofTrace
• Added scan chain tracing feature in GofTrace
• Outperforms Conformal ECO

Jun 23 2020, GVT V1.1 Released

• Enhanced net loading display in GofTrace

Apr 21 2020, GOF V7.3 Released

• Supported System Verilog connections
• Enhanced DFT circuit handling
• Fixed floating nets processing
• Fixed duplicated ports processing

Nov 07 2019, GOF V7.2 Released

• Optimization on boundary phase inversion
• Constant pin propagation to reduce ECO size
• Fixed bug in ECO verilog output

Sep 03 2019, GOF V7.1 Released

• Enhanced incremental synthesis for patch size
• Further improved LEC performance
• Fixed bugs in uniquify modules
• Enhanced support in flop phase inversion

Jun 10 2019, GOF V7.0 Released

• Doubled ECO run speed
• Cut memory usage in half
• Enhanced Key Point Mapping

Sep 29 2018, GVT V1.0 Released

• Spin-off from Gates On the Fly
• Incremental Schematic
• Powerful Debug Features

Jul 18 2018, GOF V6.2 Released

• Bug fix in Reference port clone in Parallel Processing
• Optimized processing speed
• Added feature to detect Flip-Flop phase inversion

Jun 11 2018, GOF V6.1 Released

• Parallel Processing
• Up to 5X run time improvement
• Flipflop merging enhancement

Apr 23 2018, GOF V6.0 Released

• Parallel processing implemented
• Improve run speed several folds

Nov 06 2017, GOF V5.6 Released

• Enhanced Parameters/Defines in verilog library file
• Enhanced Liberty file parser, multi-curly-brace in one line
• Enhanced black box handling
• Added API for flop mapping
• Improved patch size

Sep 25 2017, GOF V5.5 Released

• Enhanced single error fix in complicated combinational logic ECO
• Beat Conformal ECO in single error rectification
• Supported Clock Tree ECO
• Hierarchical Clock Gating Cell Bug Fix

Jun 30 2017, GOF V5.4 Released

• GUI ECO Enhancements
• Auto ECO Speed Up
• Support single port to bus port
• Support System Verilog netlist port format
• Bug fix in reset/set flop handling
• Reduce memory usage in ECO operations

Apr 06 2017, GOF V5.3 Released

• Support hierarchical new modules
• Error out on unresolved instances
• Speed up ECO process
• Tied up scan in pins to zero by default
• Bug fixes in corner cases

Feb 06 2017, GOF V5.2 Released

• Top down Automatic ECO, no need to specify modified modules as in the previous generations
• Global Logic Equivalence Check to guarantee equivalent result
• Unified ECO API, 'fix_design'
• Integrated Auto ECO Methods

Nov 23 2016, GOF V5.1 Released

• Highly Improved Auto ECO Performance
• Beat Conformal ECO in Performance
• API Enhancement
• GOF Beats Conformal ECO Case 1
• GOF Beats Conformal ECO Case 2

Sep 25 2016, GOF V5.0 Released

• Highly Improved Auto ECO Performance
• Beat Conformal ECO in Performance

May 09 2016, GOF V4.6 Released

• Auto ECO patch size improvement
• Multi-bit flop support
• Auto ECO Scan Chain bypass

Dec 27 2015, GOF V4.5 Released

• Enhanced auto ECO in Scan Chain handling
• Bypass all Scan Chain related ports
• Added phase option in get_driver API

Jun 20 2015, GOF V4.4 Released

• SOC Encounter ECO script dump enhancement
• Clock Tree Analysis

Sep 21 2014, GOF V4.3 Released

• X Source Tracing in GLS
• Boundary Optimization Debug in GLS
• Gate Level Simulation Flow by GOF

Jul 5 2014, GOF V4.2 Released

• Enhanced direct fix on BDD variables
• Removed redundant gates on no-fanout ports
• Added schematic mirror function for buffers/inverters

Feb 14 2014, GOF V4.1 Released

• Preserve buffer trees after 'fix_modules'
• Support flatten command to process hierarchical module
• Bug fix in 'get_match_nets' API

Dec 2 2013, GOF V4.0 Released

• Significant enhancement in Automatic ECO
• API 'fix_modules' to run ECO on modified modules only
• Connect up scan chain after ECO
• Convert new gates to spare type only gates
• Avoid redundant fixes
• Efficient and speedy

Feb 03 2013, GOF V3.2 Released

• New APIs, 'set_constraint' for Spare Gates mapping, 'swap_inst' for instances swapping
• Enhance 'get_loads' API to support fanout endpoints listing
• GofTrace Schematic customer menu by '-usermenu menu_name' option
• Support peer gate loading for connectors in GofTrace Schematic
• Support sub-hierarchical in reference netlist in automatic ECO

Apr 29 2012, GOF V3.1 Released

• Fixed bug in DEF parser when backslash is in hierarchical instance
• Enhanced leakage/area report
• More power related APIs and features
• Fixed Latch Clock handling
• Enhanced Waveform Restore in Gate Level

Oct 08 2011, GOF V3.0 released.

• Automatic ECO.
• Complete Netlist ECO solutions
• Built-in Logic Equivalence Check.

May 16 2011, GOF V2.4 released.

• Enhanced standard library parser.
• Logic equivalence check in logic cone ECO.
• Upgrade SOC Encounter ECO script support.
• Virtual leaf cell configuration for both schematic and netlist save.
• More GofCall APIs exposed.
• Bug fixes including negative bus index, leakage power calculation.

Nov 10, 2010, GOF V2.3 released.

• Add a hierarchical module in netlist ECO.
• Release a use case in adding hierarchical module
• SOC Encounter ECO script support.
• Multiple selections in placement viewer.
• Integrate replace_logic_cone into GofCall APIs.
• Enhanced Prime Time report file processing

Feb 14, 2010, GOF V2.2 released.

• Enhanced GofCall script APIs, added more options for existing APIs
• Added fix_setup and fix_hold for timing fix
• GUI menus adjustment
• Bug fix for keeping original comments after ECO
• Bug fix for deleting floating gates after ECO
• GofCall APIs update
• Fixed a bug in change_pin
• Updated change_port for both input/output
• Enhanced change_net to insert gates

Apr 16, 2009, GOF V2.1 released.

• Annotate Schematic
• VCD support to trace signal changes
• Good for x tracing in gate level
• Cosmetic changes in GofTrace Schematic window

Sep 26, 2008, GOF V2.0 released.

• Clipboard manipulation in GofTrace Schematic
• Single mouse click to copy net name or instance string to clipboard in GofTrace schematic
• Large flat netlists have long, unreadable net names and instance names
• Some companies adopt a flow to work on hierarchical sub-module, then mapping to the flat netlist
• However the mapping failures are higher and higher when the process going lower, P&R tools are doing more aggressively to change the netlist structure to make it routable and speedy.
• Work on the flat netlist directly is the solution
• Combining GofTrace schematic and GofCall script interface is the best way to process netlist