The changes in each SiliconCompiler release version are described below. Commit version shown in (). Where applicable, the contributors that suggested a given feature are shown in [].

Major:

• Changed yosys ASIC and FPGA synthesis to read the design with slang by default; set_yosys_useslang(False) goes back to yosys's own Verilog reader.
• Changed fileset parameters set with set_param to reach verilator and yosys exactly as written, which fixes string parameters in verilator but means a string value for yosys must now include its quotes ('"hello"').

Minor:

• Added sc-config tokens to store the tokens private dataroots are fetched with, rather than exporting them in every shell.
• Allowed sc-issue to take a node directory in place of the manifest inside it.
• Made [option,autoissue] write a testcase however a node fails, not only when its tool fails, named sc_issue_<design>_<jobname>_<step>_<index>.tar.gz and with its libraries chosen by the new issue settings.
• Added missing_ok to get_dataroot, which returns where a local dataroot would be rather than raising when it does not exist.
• Tools:

• openroad: added LibertyBinaryTask and the liberty_binary utility to convert liberty to the binary .blib that OpenROAD 26Q4-509 or newer reads in its place, and fixed a node failing when OpenROAD reports an infinite slack.
• yosys: stopped adding buffers and tie cells in ASIC synthesis by default, limited yosys to the task's thread count rather than every core, and fixed the registers metric counting a module's flops once however many times it is instantiated.

Major:

• Removed the sc-dashboard and sc-server commands in favor of python3 -m siliconcompiler.apps.utils.dashboard and python3 -m siliconcompiler.remote.server, and the cleanup support app in favor of sc-config cache clean.

Minor:

• Added sc-config, which lists and changes settings, sets up and tests job status email, shows and sweeps the cache, and prints where SiliconCompiler keeps its files.
• Added --gui, --web and --shell to a node's replay.sh, where the tool supports them, to rerun the step in its GUI, web viewer or interactive prompt and leave it open; an sc-issue testcase's run.sh passes them through.
• Added RunListener, registered with Scheduler.add_listener, to hear a run start, each node start and finish, and the run end, and deprecated TaskScheduler.register_callback in its favor.
• Added opensta to the asic, asic-hls and asic-soda groups of sc-install.
• Tools:

• openroad: added pdn_dont_add_pins to power_grid, and made init_floorplan read a bump map produced by an earlier step.

Major:

• Removed the public server as the default for remote runs, so a remote run now fails unless a server has been configured with sc-remote.

Minor:

• Added gitlab:// and s3:// dataroots, the latter through a new s3 extra, along with a +private form of every scheme and python:// paths to a directory inside a package.
• Masked dataroot credentials in logs, in the manifests a run writes for its tools, and in sc-issue testcases, which also leave out environment variables that look like secrets.
• Reworked file collection for remote runs and sc-issue so collected files keep their names, each file is stored once, and links inside a collected directory are kept.
• Changed sc-show without a file to open the richest view a build has, an odb ahead of the def beside it, and made sc-show -list print the order it searches in.
• Added nested -f and -F file lists, -I include directories and -v library files to Design.read_fileset.
• Added a toolscripts entry point so a package can add tools to sc-install or override SiliconCompiler's version pins, along with reusable workflows that keep those pins current and build their docker images.
• Tools:

• klayout: changed the screenshot margin to a percentage of the design's size, defaulting to 1%, rather than a distance in microns.
• openroad: fixed a def opened with sc-show losing its contents when a hierarchical netlist sat beside it, and detailed routing ignoring [asic,minlayer] and [asic,maxlayer].
• yosys: added cross-boundary optimization of a design that is not flattened, on by default with yosys 0.58 or newer, and SAT-based flip-flop merging through opt_dff_sat.

Minor:

• Reworked how a run reuses an existing build directory: an upstream excluded by [option,from], [option,to] or [option,prune] that cannot supply what depends on it is now rebuilt, rather than the run failing on an input nothing in it can produce.
• Added a task's declared input and output to what decides whether a node has to rerun.
• Fixed a previous run's SKIPPED status being carried into the next run, which stopped a re-enabled step from running.
• Added token authentication for gitlab and bitbucket dataroots, and fixed tokens being sent under the wrong username, written into the logged clone URL, and prompted for on a machine that cannot answer.
• Moved pandas into the dashboard extra and added a server extra for running sc-server, so a default install carries only what a local flow needs.
• Sped up the initial load by deferring imports that only part of a run needs.
• Tools:

• openroad: added support for rectilinear floorplans, and required an explicit die and core area when a padring is used.

Minor:

• Split the cache directory into dataroot for downloaded data sources and tools for the caches tools keep between runs, and added Task.cachedir so a tool cache lands where [option,cachedir] covers it.
• Added an automatic sweep of the data source cache at the start of a run, throttled to once a week and to entries unused for 90 days, both tunable through cleanupdays and cleanupinterval.
• Added Task.get_digest, a hash of everything that configures a task, for naming a cache directory after a configuration rather than after a tool.
• Reworked [option,continue], which is set on the node that may fail: nodes downstream of an excused failure now run on the inputs that did arrive instead of being skipped.
• Added run cancellation to the scheduler, which keeps queued nodes from starting and ends the ones already running along with their descendants.
• Fixed environment variables that are declared without a value being handed to the tool as None.
• Added docker as a cluster type for sc-server, moved its job directories under a build root, and pointed compute nodes at a cluster-wide cache rather than the home directory of whoever runs them.
• Added a docker compose deployment of a server and a slurm cluster under setup/server.
• Tools:

• bambu: write the compiler cache ccache keeps into the tool cache rather than the home directory.
• chisel: keep coursier's jar cache in the tool cache.
• keplerformal: added reset_port and reset_cycles to the sec task, and treat a difference the tool finds as a verdict rather than as a failure to run.
• openroad: added the scan_clock_mixing, scan_max_length and scan_max_chains scan chain controls to global placement, and made logic depth reporting ask for a single path per group so it no longer exhausts memory.
• opensta: made logic depth reporting ask for a single path per group so it no longer exhausts memory.
• verilator: write the compiler cache ccache keeps into the tool cache rather than the home directory.

Minor:

• Shrank the tool container images: symbols are now stripped from every installed tool, packages a tool only needed to build itself are removed, link-time-only static archives are dropped, and a tool image is no longer copied into sc_tools when a dependent image already carries it. Added sc_remove_prereqs and sc_strip_prefix to the tool install helpers.
• Tools:

• chisel: install a JRE of its own rather than relying on the one surelog pulls in for its build, and skip the sbtn launchers built for other platforms.
• mlir: install only the components the flow and soda-opt need instead of the whole LLVM install tree.
• openroad: keep tie cells in the netlist written out for logical equivalence checking.

Minor:

• Added LECFlow, a logical equivalence check flow, with combinational, sequential and k-induction checks. [jyrj]
• Added a SODA Synthesizer front end, which takes a machine learning model in MLIR through soda-opt and Bambu into the normal ASIC flow, along with SODAASICFlow and a tutorial and example. The elaboration, synthesis and ASIC flows now take a frontend flowgraph instead of a language, so a front end can live beside the tool driver it belongs to.
• Split tool output onto its own LOG and LOGERROR log levels so it can be told apart from SiliconCompiler's own messages, and made quiet apply to a task's own logging without hiding why a run stopped.
• Reworked SDC clock extraction to handle line continuations, variables and the SDC files of timing modes, and added get_clock_port.
• Added job cancellation to the remote server and the slurm scheduler, along with job ownership checks, an upload size limit, and a client that works before a server has been configured.
• Fixed sc-show to honor the tool it was given, and to find the open, show and screenshot tasks that are not hard-coded.
• Moved the tool container builds to Ubuntu 24.
• Tools:

• bambu: added RTL simulation, cell area and cycle count reporting, and parameters for the constraints and technology files, memory allocation policy, front-end compiler and testbench filesets.
• mlir: added a tool driver for the MLIR tools.
• openroad: added support for the ccs delay model and logic depth histogram reports.
• opensta: added support for the ccs delay model and an interactive open task.
• soda: added a soda-opt tool driver.
• yosys: added an interactive open task.

Minor:

• Added the gt2n_demo and icsprout55_demo targets.
• Added set_dieoutline and set_coreoutline, which take the width and height in the same order as get_diesize and get_coresize return them. These deprecate set_diearea_rectangle and set_corearea_rectangle, which took the height first.
• Allowed the tool install scripts to run without sudo access when the prerequisite packages are already present, which makes an unprivileged install into the default ~/.local prefix possible.
• Tools:

• openroad/opensta: brought the setup and hold timing reports to parity, filled in the reports that were missing, and moved the per-corner reports into a per-scenario directory.

Minor:

• Added PNRFlow, a place-and-route only flow, which ASICFlow is now assembled from.
• Added computation of the core or die area from coremargin when only one of the two is provided.
• Added support for xz and Zstandard compressed tarballs to package downloads, and switched archive format detection to the contents of the download rather than its name.
• Ensured the remote configuration file, which can hold a plaintext password or API key, is only readable by the user.
• Sped up manifest writing for manifests containing non-ASCII characters.
• Reorganized the documentation landing page, and added a padring tutorial and example, simulation and OpenROAD how-tos, and an external libraries page.
• Tools:

• openroad: aligned the place-and-route flow with ORFS and LibreLane, adding an opt-in timing repair on the global routing parasitics (rsz_enable) and a new antenna repair node after detailed routing, added an opt-in setup timing repair on the synthesized netlist (repair_synth_timing), which is an alternative to removing the synthesis buffers rather than additive.

Major:

• Removed the Schematic schema, since it was unused.

Minor:

• Added flowgraph callbacks, allowing flows to be modified after being inserted into a project.
• Added a beta version of hierarchy handling to elaboration to support parameterized modules.
• Added csv as an accepted task manifest format.
• Fixed unsupported schedulers being silently accepted.
• Fixed remote package re-download and ensured cached packages are only extracted once.
• Expanded the documentation with new tutorials, examples, FAQs, and how-tos, along with link checking.
• Added Ubuntu 26 and RHEL 9 tool build fixes with build selection and a weekly build schedule.
• Tools:

• openroad: added a PEX correlation methodology, along with the openroad_pex flow and calibration APIs, which replaces generate_openroad_rcx.
• openroad/opensta: reorganized the generated reports to make them easier to follow.
• verilator: added support for --trace-structs and --trace-depth. [HU90m]
• sby: switched the default engine from boolector to bitwuzla.

Minor:

• Added a cached schema class to speed up loading, with support for frozen schemas.
• Added system-wide settings, letting an administrator provide machine-wide defaults.
• Added tool-install checks to avoid rebuilding already-installed tools.
• Tools:

• opensta: added support for reading VCD files for switching-activity-driven timing analysis.
• yosys: removed the standalone yosys-slang plugin now that it ships with yosys 0.67.

Minor:

• Added a formal property check flow (PropertyCheckFlow) for BMC, cover, and prove modes.
• Tools:

• sby: added a SymbiYosys formal verification tool with install scripts for Ubuntu 22/24/26.
• yosys: refactored synthesis scripts and shared TCL procs, and added tests for slang usage.

Major:

• Removed support for Python 3.9.
• Changed the global-value key from global to * to avoid name conflicts, with legacy read support for older manifests.
• Added rename_node to allow flowgraph nodes to be renamed.
• Added value ranges and limits to schema types using Ada-style notation, e.g. int<0..100>, float<..1.0>, and enums like str<a,b,c>.
• Moved the dashboard to an optional dependency.

Minor:

• Added language detection to targets.
• Added a warning when installed pip package versions are out of sync.
• Made get_cores aware of the scheduler's processor affinity.
• Allowed partial matches when setting and getting flows.
• Made filelist generation depth first.
• Added Ubuntu 26 tool install scripts.
• Fixed warnings about leaked resources and mishandled atexit cleanup.
• Tools:

• openroad: added a parasitic extraction (PEX) interface to the PDK with a warning when no corner is found, and added a dedicated cleanup task that moves logic cleanup out of floorplanning.
• montage: added a convert tool, automatic montage handling, and host-scaled ImageMagick resource limits via a private policy.xml.
• icarus/verilator: added a parameter to set the timescale for compilation.

Minor:

• Added breakpoint handling in the scheduler to avoid multiple breakpoints from running at the same time.
• Tools:

• img2stream: added LEF output.
• pyslang: updated to version 11.
• openroad: fixed write_views on missing OpenRCX files.
• verilator: added support for verilog only testbenches.

Minor:

• Fixed error message in smake when no file is provided.
• Improved path/dir/file type checking in schema types.
• Fixed issue where flows would be marked as failed when using option,from.
• Added preferred indicator to sc-show -list.

Minor:

• Fixed flowgraph handling of builtin tasks, like min and max, to correctly handle the input/output file checks.
• Fixed the time reporting on the dashboard to avoid double counting parallel tasks.
• Tools:

• openroad: added checks for pin placement outside die area and added support for glob skip reports.

Minor:

• Made the breakpoint interface more robust and fixed issues with text getting garbled.
• Fixed issue when setting option,from where flowgraph would ignore it if the step appeared in a leg with parallel paths.
• Tools:

• openroad: added better handling of pin placement.

Major:

• Added OpenTask as parent class to ShowTask and ScreenshotTask, which enable opening in the commandline.

Minor:

• Added .write_depgraph to Project to enable displaying the dependency graph of a project.
• Fixed calls to sc-issue to remove the requirement to add -cfg.
• Fixed file collection to avoid collecting a file twice.
• Updated log reading handling to better handle tools that emit partial lines.
• Fixed git file resolver when LFS is used.
• Tools:

• openroad: added support for OpenTask and reordered the creation of placement blockages.

Minor:

• Added dataroot resolver to allow for nesting dataroots.
• Fixed log files accumulating in the build directory and updated log naming to make it easier to identify runs.
• Added job termination when system memory exceeds 99% utilization.
• Tools:

• openroad: added support for placement and routing blockages in init floorplan.

Minor:

• Switched to marking cached downloads as readonly to avoid accidental overwrites.
• Added utility app to cleanup caches with python3 -m siliconcompiler.apps.utils.cleanup.
• Updated targets to map regfiles from lambdalib.
• Added scp based file path resolver to allow files to be copied between machines.
• Tools:

• openroad: Added option to check that all pins are placed and remove blockages created during macro placement.

Minor:

• Added -tool option to sc-show to allow for tool filtering.
• Ensure the flow restarts when the topmodule name changes.
• Tools:

• openroad: Added support for handling 3D pin placement, reordered macro placement to occur before padring generation, and added 3D blox viewing support.

Minor:

• Tools:

• cocotb: Added plusargs task to allow for easier access to plusargs in simulations.

Minor:

• Updated layout handling of the dashboard to better handle future modifications.
• Added help screen to dashboard and basic controls for what is displayed.
• Added check for adding dependencies to projects without a name.
• Added support for ?submodules=<True/False> for git dataroots to control pulling submodules.
• Tools:

• klayout: added task to convert images to GDS.
• vcd2fst: added to support converting VCD files to FST.

Minor:

• Fixed recursive call on .write_fileset to avoid excessive recursion.
• Fixed file log installation to ensure the log contains errors from tool setup.
• Added additional error checks when adding aliases to check for no-op aliases.
• Added basic handling of type hinting to smake.
• Tools:

• openroad: update scripts to provide initial handling of multi-mode timing.
• opensta: update scripts to provide initial handling of multi-mode timing.

Minor:

• Fixed handling of tokens during github+private dataroot resolution.
• Fixed from_dict handling to correctly restore a schema from file.
• Ensure the checks in .run() gracefully handle missing files.
• Tools:

• klayout: default to writing gzipped files.
• openroad: default to writing gzipped odb and def files.

Major:

• Changed schema to make design object base class for all libraries.

Minor:

• Fixed resizing of dashboard to ensure logs are visible after resize.
• Fixed dashboard use when breakpoints are present.
• Fixed sc-show to correctly handle -cfg.
• Fixed flowgraph handling when using option,from.
• Updated time format in dashboard to make it easier to read.
• Added get_flow to Project class to allow access to the loaded flowgraphs.
• Tools:

• klayout: added stream2lef task to generate a lef from a GDS or OAS file.
• openroad: fixed version parsing.
• opensta: added write_sdf and write_liberty support to timing task.
• vpr: updated pin constraint handling.

Minor:

• Fixed dashboard line wrapping to correctly account for the width of the terminal.
• Reworked error handling to ensure backtrace is available when running with the dashboard.

Minor:

• Fixed commandline handling of sc-issue when -cfg is missing.
• Added support for -jobs to sc-install to control number of build jobs.
• Updated detection of editable python installs.
• Fixed json serialization bug when journal is active.
• Tools:

• yosys: removed default use of kogge-stone techmap pass.
• openroad: correctly include lefs in floorplanning required keys.
• icarus, verilator: added support for cocotb plugins.

Minor:

• Tools:

• builtin: added wait task to better handle stalling flow progress
• klayout: added merge task to provide a simple interface for merging multiple GDSs
• pyslang: updated to v10.0.0

Minor:

• Corrected auto dataroot behavior when setting abs paths.
• Corrected logging during check_filepaths on design objects to ensure errors are printed.
• Added .get_library to Project to allow access to imported libraries.
• Tools:

• openroad: added option to bypass SDC loading.

Minor:

• Expanded parameter setters for tasks.
• Tools:

• openroad: fixed pin constraints handling, added support for editing halos.

Major:

• Changed schema to better handle timing constraints, by splitting out mode specific information from the scenarios.

Minor:

• Reimplemented flowgraph rendering with file IO information.
• Fixed tool version checking to support threaded runs.
• Reworked use of pipes during execution to avoid creating more pipes than needed.
• Fixed flowgraph IO checks to only check required files.
• Tools:

• klayout: fixed handling of GDS generation when foreign is specified in lef.
• openroad: added support for halo constraints.
• kelper-formal: added initial support for LEC with kepler-formal.

Major:

• Added support for settings.json to allow users to set defaults and persistent options and controls for slurm nodes.

Minor:

• Added limit to the number of warnings/errors that will be printed to the terminal.
• Added copy_* methods to timing constraints to better support building multiple modes.
• Added support for flow to run collection if the specific node requires it.
• Added check for conflicting flow tasks and generate an error if one is found.
• Added Python 3.14 to testing matrix.
• Improved logging to help identify specific log files.
• Ensured data is cleaned up when a failure occurs while downloading remote data.
• Corrected missing history when failures occur in the flow.
• Fixed bug causing skipped tasks to not get re-executed when restarting flow.
• Tools:

• yosys: added warning to indicate that slang was not found, added controls for undefined signals, and buffer insertion.
• openroad: added support for using bmaps to place bumps, added IR drop task to provide better "what-if" analysis.
• vivado: added support for pre/post scripts.

Minor:

• Added support for downloading .bz2 files as dataroots.
• Added new accessor methods to Flowgraph.
• Implemented lazy loading for the schema to significantly speed up loading from disk.
• Implemented multithreaded checks at the start of .run() to accelerate the determination of which nodes need to be re-run.
• Optimized runtime handling of .active_* attributes to avoid excessive copying.
• Corrected file upload behavior for the remote runner.
• Tools:

• klayout: Fixed the screenshot task to ensure it can be correctly inserted into a flowgraph.

Minor:

• Corrected sc-issue handling of libraries to properly include pdk information.
• Added .find_task to Task class to replace get_task and deprecated this method.
• Restored missing copy flags in schema to ensure proper upload to remote runners.
• Added tool version check to start of .run() to allow for early version checking when possible.
• .check_filepaths now checks dependency filepaths too.
• Tools:

• builtin: added tasks for filtering files between nodes and entry node to copy files into the build directory.
• gtkwave: added fst to supported file extensions.
• openroad: fixed screenshot task to allow for insertion into flows and handling of timing information.
• surfer: added fst to supported file extensions.
• verilator: fixed path used for automatic VCD dump.

Minor:

• Added support for providing external tool install scripts and groups to sc-install.
• Fixed installation order in sc-install to use lists instead of sets, preserving the intended group ordering.
• Fixed path handling to correctly resolve paths when dataroot starts with an environment variable.
• Updated task scheduling to more reliably honor the node order defined in the flowgraph.
• Tools:

• opensta: reimplemented task skipping logic for FPGA timing analysis.

This release introduces a major architectural overhaul to improve usability, flexibility, and error checking. These are changes that will require you to update all your existing scripts and workflows. This is a release towards reaching v1.0.0.

Major:

• The monolithic Chip object has been replaced by a set of target-specific Project classes (ASIC, FPGA, Sim, and Lint). This change provides better type-hinting, validation, and isolates settings for different targets.
• The Design class is now the primary interface for managing sources. The old .input() calls have been replaced by a more structured "fileset" system, allowing you to group related files (e.g., RTL, SDC, etc.) and toggle them easily.
• The command-line dashboard, which shows real-time progress of a run, is now on by default for interactive sessions. This can be controlled via .option.set_nodashboard(True).
• The sc command-line application has been removed in favor of using Python scripts directly for better reproducibility. The .clock() helper method has also been removed.
• While direct schema manipulation with .set() and .add() remains supported, we now recommend using a more "Pythonic" API with helper methods for common settings. This improves code readability and reduces errors from misspelled keys.
• All task drivers have been rewritten to the new API.
• The core API has been refactored to be more object-oriented. Instead of interacting with a single, monolithic Chip object, you now work with distinct objects that have clear responsibilities, such as Project and Design.

Minor:

• Significantly expanded testing coverage of user facing methods to better support checks for backwards compatibility.

Minor:

• Implemented support for sets in schema, denoted by {}.
• Fixed cache folder handling by appending unique ID to each folder to avoid name collisions.
• Command line dashboard shows siliconcompiler log when tool log is not available, output is now preserved on exit, and improved handling of multiple jobs layout.
• Added job.log to build directory to provide a file source for the logging as well as the terminal.
• Tools:

• slang: updated to slang v9.0.

Minor:

• Fixed handling of tool command line arguments to ensure they are all strings.
• Fixed handling of schema parameters with default fields beyond just value.
• Fixed handling of schema set parameters.
• Added time delays when packages are locked to avoid deadlocks.
• Moved package caching to Resolver class to allow for shared caching across schema sections.
• Modified return value of .getkeys() to return a sorted tuple of the keys.

Major:

• Removed support for Python 3.8.
• Changed node names from {step}{index} to {step}/{index} [Ciprian167].

Minor:

• Ensure only tool outputs are forwarded for skipped nodes.
• Tools:

• openroad: limit default max displacement for detailed placement optimizations.
• opensta: added support to gracefully handle empty input files.
• surfer: added support for surfer for waveform viewing [infinitymdm].
• vpr: added support to generate timing analysis files.

Major:

• Added .find_files and .check_filespaths functionality to BaseSchema.
• Added functionality to BaseSchema to allow reverse traversal of the schema.
• Removed support for paths containing environmental variables.

Minor:

• Added a values only mode to getdict to only return the values in the schema.
• Changes the log color in the commandline dashboard to white for better visibility.

Minor:

• Fixed bug in git submodule checkouts that left the incorrect version of the submodules checked out.
• Updated replay script to provide access to replay python scripts.
• Fixed bug in remote client that caused errors when running with hashing turned on.
• Updated [record,starttime] and [record,endtime] to include microseconds.
• Tools:

• slang: updated to version 8.1.

Minor:

• Removed flowgraph utility functions and replaced with calls to flowgraph class.
• Fixed manifest merging during remote run.
• Switched core scheduler code to be class instead of a collection methods.
• Attempt to determine if sudo is needed during sc-install and selectively apply it.
• Tools:

• opensta: added support for sdf reading.
• slang: use elaboration for linting to ensure user feedback.
• yosys: ensure cell areas are annotated before determining flattening.

Major:

• Core schema infrastructure rewritten to provide better testing and easier use when integration changes.

Minor:

• Added multi-job handling to command line dashboard and corrected handling of coloring in the log.
• Updated help, scopes, and default values in various keys int he schema.
• Allow packages to reference keys as data source.
• Speedup load time by selective loading large libraries.
• Added caching to flowgraph node handling to speed up common use cases.
• Tools:

• openroad: added gif of IR drop
• yosys: improved yosys-slang integration
• sv2v: allow runtime bypass via ['tool', 'sv2v', 'task', 'convert', 'var', 'skip_convert'] = True.

Major:

• Added a commandline dashboard to provide quick overview of a run. Accessible by adding .dashboard(type='cli') before calling run(). [Ciprian167]

Minor:

• Fixed sc-issue bug that caused the directory to have a partial name.
• Fixed replay.sh generator that caused an invalid bash script to get generated during issue creation.
• Tools:

• openroad: fixed metal fill script bug that prevented the metal fill from executing properly.
• opensta: added build scripts for opensta.
• yosys: added ability use yosys as a frontend for simple design.

Minor:

• Expanded tool builds to support arm architectures, where possible.
• Added tool group descriptions to sc-install -help.
• Tools:

• openroad: added repair design option to repair timing to reduce number of design rule violations.
• yosys: split the FPGA and ASIC synthesis flows.

Minor:

• Added github specific url resolver for downloading artifacts from github.
• Added support to specify step and index for sc-show and sc-dashboard.

Major:

• Changed default behavior of .summary to only print metrics summary, and added .snapshot to generate and display job summary image.
• Moved default verilog/system verilog frontend parser to Slang.

Minor:

• Changed examples to use a requirements.txt file for external dependencies.
• Tools:

• openroad: added timing histogram reports.

Minor:

• Fixed tcl manifest to correctly reflect the data types from the schema.
• Added end of install status message to sc-install.
• Tools:

• vpr: updated to v9.0 and added timing metrics extraction.

Major:

• Updated schema to support further advanced packaging.

Minor:

• Improved the generation of relay files to provide better insight when debugging.
• Disabled the generation of the html report by default.
• Fixed the handling of environmental variables to ensure they are all set at the start of the node execution.
• Made schema fields pernode and scope enums for easier handling.
• Tools:

• openroad: added global routing metrics recording.
• yosys: added support for loading slang and moosic plugins.

Major:

• Updated schema to support advanced packaging.

Minor:

• Added additional feedback during sc-install if user paths are not configured.
• Added support for generating screenshots and displaying .dot files.
• Tools:

• bluespec: fixed support for builtin modules.
• openroad: added macro placement constraints script option via ['tool', 'openroad', 'task', 'macro_placement', 'file', 'rtlmp_constraints'], automatic power grid blockage for pins via ['tool', 'openroad', 'task', 'power_grid', 'file', 'fixed_pin_keepout'].

Minor:

• Added helper function to allow tasks to handle clock information in a uniform method.
• Improved feedback on unsupported platforms during sc-install.
• Tools:

• bambu: updates to better handle platform and clock information.
• openroad: added recover_power option support.
• yosys: switch to use builtin keep_hierarchy to speedup compile times.

Major:

• Added color support to logger to allow for easier identification of warnings and errors.

Minor:

• Corrected install scripts for surelog and bambu.
• Fixed task setup order to avoid setting up tasks before the input nodes have been setup.
• Tools:

• slang: added elaboration task.
• yosys: added controls for separator used during flattening via ['tool', 'yosys', 'task', 'syn_asic', 'var', 'hierarchy_separator'].

Major:

• Added gtkwave show task to allow for vcd viewing.
• Removed enablement for conda-eda as this is no longer a supported project.

Minor:

• Allow passing a file path to .register_source to make it easier to handle retive path to the current file.
• Tools:

• openroad: added support for mutli-bit flipflop mapping and initial support for scan chain insertion, correct pin ordering from constraints.

Major:

• Added optional optimizer install extra to provide design optimization via google-vizier.

Minor:

• Added capability to import flist files via Chip.import_flist
• Added quiet loglevel to limit siliconcompiler logging to just the most critical information.
• Tools:

• openroad: switch to turn on new macro placer by default and correct handling of dont_use based on cell lists.
• yosys: add detailed metrics for cell counts, added support for handling clockgate insertion, simplified library file handling, and updated lec task.
• sta: added check_library task to help verify library setups for asic flows.

Major:

• Update asicflow and openroad driver to utilize smaller tasks. This is a breaking change from the previous implementation, but allows for better flow composability.
• Added ['record', 'pythonversion'] and ['record', 'pythonpackage'] to schema to allow to better environment and provenance tracking.

Minor:

• Reworked remote client into single class to allow for better job tracking locally.
• Updated logic for printing package access information to avoid repeating information when possible during a run.
• Tools:

• openroad: rework tasks into smaller tasks, add access to eliminate_dead_logic via ['tool', 'openroad', 'task', 'init_floorplan', 'var', 'remove_dead_logic']
• yosys: fix fpga synthesis to allow for better macro extraction and added ability to map tri-state buffers to asic synthesis.

Minor:

• Added option to limit size of emailed logs based on number of lines.
• Fixed handling of find_files in frontend tools
• Removed automatic error when FPGA is not loaded, as this can be handled by the tool/task drivers.
• Tools:

• vivado: update tool and task drivers to handle v2024.x and cleaned up output filenames.

Minor:

• Fixed dashboard handling of graph metrics when job history contains different sets.
• Tools:

• openroad: added reporting of module cell areas.
• vpr: added options to prevent crashing in designed with dangling ports.

Minor:

• Correct requirements to remove dashboard from python 3.9.7, due to issue in 3.9.7.

Minor:

• Added a support module to call for the manifest summary from python3 -m siliconcompiler.apps.utils.summarize -cfg <file>.
• Removed dashboard from python 3.9.7, due to issue in 3.9.7.
• Tools:

• openroad: updated metrics task to allow for verilog inputs.

Major:

• Added interposer_demo target and interposerflow and drcflow.

Minor:

• Added macroarea, padcellarea, and stdcellarea to metrics.
• Added footprint to datasheet in schema.
• Improved handling of sc-show and sc-dashboard when searching for manifests.
• Tools:

• openroad: added metrics task to collect metrics and an rdlroute task to perform floorplan initization and rdlrouting.
• klayout: fixed handling of fill during GDS generation.

Major:

• Added testing support for Python 3.13.

Minor:

• Added support to allow dashboard to auto select an open port if not specified.
• Tools:

• openroad: updated minimum version to support database markers and added support to save clock routing.
• surelog: ensure its require list is complete to properly detect changes in inputs.
• yosys: added screenshot task.
• klayout: added drc task to run DRC and convert_drc_db task to convert a klayout DRC database to openroads.
• vpr: added vpr_device_code support.
• magic: added support for uncompressing LEF files.

Major:

• Added sc-install utility application to help install tools on supported platforms.

Minor:

• Added rhel8 and rhel9 install scripts.
• Fixed bug in sc-install to account for different operating systems support.
• Ensure generated files .errors and .warnings are included in the metrics files.
• Tools:

• openroad: added options to control optimization (remove_synth_buffers, rsz_skip_setup_repair, and rsz_skip_hold_repair).
• xdm: added install script.

Major:

• Added sc-install utility application to help install tools on supported platforms.

Minor:

• Updated .input/.output to support receiving lists of files.

Major:

• Updated lambdapdk to add support for ihp130 and added demo target.

Minor:

• Tools:

• openroad: fix rotation handling in floorplanning.
• xyce: updated tool driver implementation.
• xdm: added xyce netlist conversion tool.
• openfpgaloader: removed non-functional implementation of openfpgaloader driver.

Major:

• Updated schema constraints to remove the use of the z-axis.
• Added schematic information to the schema.
• Changed component placement constraints to reference the lower left corner of the instance instead of the center.

Minor:

• Tools:

• openroad: updated to account for new placement and rotation constraints.

Minor:

• Fix path handling from commandline.

Major:

• Deprecated .load_target() in favor of .use().
• Added a -use option to the sc cli app to allow for loading of modules.
• Removed the chip input from libraries, pdks, fpga, etc to simplify setup.

Major:

• Moved surelog distribution to a separate package, making SiliconCompiler a pure python distribution.

Minor:

• Fixed handling of files and directories from the commandline interface.

Minor:

• Limit schema sections getting imported from libraries to speed up importing.
• Added verilator tool option to dvflow.
• General speedup improvements to schema object.
• Added find_node_file helper function to make accessing files in the node run directory as easy as possible.

Major:

• Removed -generate from sc-issue when creating a sharable testcase.
• Allow for recursive definitions of asic logic and macro libs from imported libraries.

Minor:

• smake improved handling of boolean arguments and arguments with default values.
• Corrected .swap_library to correctly swap libraries.

Minor:

• Added portname to pins in schema.
• Allow .swap_library to swap to None when removing a soft-library.
• Tools:

• openroad: fixed max density error to 100% and allow for multiple padring files to be loaded instead of just one.

Major:

• Added smake commandline tool to enable a Makefile like interface to make.py files.
• Removed the need to have local execution for remote jobs.

Minor:

• Added additional helper functionality to Library, PDK, and FPGA to better handle package registration.

Major:

• Removed ['option', 'copyall'] from schema.
• Updated ['option', 'loglevel'] to be lower case settings.
• Added ['record', 'toolexitcode] to track the tool exit code during execution.
• Added whitelist of directories to sc-remote to avoid uploaded directories not approved by the user.
• Add support to automatically add soft IP libraries to ['option', 'library'] if specified by the library developer.

Major:

• Removed ['option', 'mode'] and ['option', 'frontend'] from schema.
• Moved flowgraph runtime information into ['record', ...].
• Implemented a dynamic flowgraph that is capable to skipping nodes that are not needed, for example in the case that a design contains VHDL and not verilog, the verilog preprocessing is skipped.
• Split ['input', 'rtl', 'verilog'] into ['input', 'rtl', 'systemverilog'] and ['input', 'rtl', 'verilog'] to be better able to tell the file types apart.
• Added support for remote jobs to be marked as rejected.

Minor:

• Fixed issue generation for python only tasks.
• Added memory usage collection to python only tasks.
• Prevent Chip.collect() from collecting the user home directory and current build directory.
• Tools:

• slang: added warning and error metrics collection.

Major:

• Added slang tool with a lint task.

Minor:

• Corrected reading of previous run manifests to avoid loading manifests of nodes while will need to be rerun.

Major:

• Overhaul of Chip and Schema python APIs.

• Major Chip function changes: renamed register_package_source -> register_source and _getworkdir -> getworkdir.
• Major Schema function changes: renamed _has_field -> has_field, _remove -> remove, and _is_empty -> is_empty.

• Overhaul of Schema keys to clean unused keys and keys with overlapping purposes, major changes:

• Added metrics: drcs, setupskew, holdskew, and inverters.
• Removed the unit section of the Schema.
• Renamed ['option', 'cache'] -> ['option', 'cachedir'].
• Merged behavior of ['option', 'flowcontinue'] and ['option', 'continue'] into ['option', 'continue'].
• Removed ['option', 'relax'], ['option', 'trace'], ['option', 'skipall'], and ['option', 'skipchecks'].

• Add ability for job scheduler to send status update emails via ['option', 'scheduler', 'msgcontact'] and ['option', 'scheduler', 'msgevent'].
• Make resume the default behavior for runs, when a new run is needed ['option', 'clean'] can be set to True to delete the old run and start fresh.
• Add capability to copy an old run and resume from a specific node, allowing users to preserve the original run while avoiding rerunning previous steps.

Minor:

• Add option to write_flowgraph to add file annotations to graphs.

Major:

• Add support for docker based running through the use of the ['option', 'scheduler', 'name'] = 'docker'.

Minor:

• Ensure that exceptions are printed to log when they occur during runs.
• Added timestamp checking to resume checks when file hashes are not available.
• Implemented totaltime metric to track the total execution time of a run.

Minor:

• Expended daily CI testing to include all examples.
• Cleaned up python requirements to remove unused ones.
• Added verbose and require_reports flags to check_checklists to allow for better control of checklist checking.

Minor:

• Limit logging while generating testcases during run.
• Move sc-leflib to test requirements

Major:

• Fixed accounting for resources in scheduler.
• Removed limitation that prevents slurm from being the first node in the execution graph.
• Added capability to generate standalone testcases on failures to make issue reporting easier.

Minor:

• Print stacktraces in logger to allow for better tracking of errors.

• Tools:
  • opensta: fixed thread handling in tool driver and added a library reporting task to collect information about timing libraries.
  • openroad: correct image collecting to avoid generating IR drop on every task.
  • slurm: provide clear error message when slurm is not installed.
  • surelog: correct top module handling in systemverilog mode.

Major:

• Added support to hash directories.
• Ensure that resume removes stale data in following nodes during run.
• Run provides warning if system is running out of memory.
• Local scheduler updated to prevent executing parallel nodes which exceed the resources available, also controllable via ['option', 'scheduler', 'maxnodes'].
• Added support for nodes to receive the same file from multiple inputs.
• Added support to detect changes to the input files and node settings during resume and rerun those nodes.
• Added support for mixed-frontends.

Minor:

• Ensure that global values can be access and modified in strict mode.
• Added build scripts to tools for ubuntu 24.04.
• Added synflow which runs yosys synthesis and opensta timing.
• In strict mode, only files declared by a task driver will be copied into the inputs directory.
• In the event of a tool failure the node will run to completion before erroring out to allow for additional data gathering.
• Renamed export step in asicflow to ensure proper graph handling.

• Tools:
  • opensta: added a standalone tool with timing task.
  • openroad: ensure the SDC file is correctly copied in when screenshot task is part of a flowgraph.

Major:

• Added support to handle casting to strings in the schema when setting a string key.
• Added initial support to allow for type changing in the schema via Schema._change_type.
• Corrected tool module searching to correctly allow for tool modules to be in __init__.py
• Increased the default densities of all asic targets to 40%.

Minor:

• Tools:
  • openroad: added additional support to control what is written out in the export task.
  • verilator: ensure if the user defines the VERILATOR parameter, the tool driver filters it out as as generates an error otherwise.

Minor:

• Tools:
  • openroad: fixed run issues related to placement density selection and missing DRV reporting.

Minor:

• Search for summary image by walking backwards through the executed nodes.
• Sped up schema loading and merging by avoiding unneeded deepcopies.
• Added support to set a list in the schema with a 'set()'
• Tools:
  • ghdl: added support for ['option', 'define'].
  • yosys: added kogge-stone operator mapping to asic flow, removed library merging hack which is no longer needed.
  • openroad: added better support for selecting global placement density, added support to control metrics and reports in tasks via ['tool', 'openroad', 'task', <task>, 'var', 'reports'].
  • netgen: filter errors in stderr to ensure "Note:" are not interpreted as an error.
  • klayout: allow tool to handle fill importing natively from DEF.

Minor:

• Added helper functions to tcl to make accessing schema information easier.
• Added helper functions to allow tools to have consistent behavior around picking from pdk/library/option variables during setup.
• Ensure the remote client downloads the final results from the remote to get any logs and error messages.
• Tools:
  • openroad: fixed default routing via settings.
  • klayout: made hide_layer variable more consistent with klayouts layer information, and added support for .gz file handling in show and screenshotting tasks.

Minor:

• Switch to use templates for generating tool files instead of python print statements to make it easier to maintain.
• Added logic depth to schema metrics.
• Tools:
  • yosys: added support for handling hierarchy selection with globbing, added better handling of library merging to ensure liberty templates are properly copied in.
  • openroad: added support for extracting logic depth of the design and added irdrop extraction to tool driver.

Minor:

• General cleanup of documentation building.
• Tools:
  • yosys: added support for specifying blackbox models via ['tool', 'yosys', 'task', 'syn_asic', 'var', 'blackbox_modules']

Minor:

• Fixed packaging extraction when downloading from github.
• Fixed remote run file retrieval to avoid errors when extracting and moving files.
• Tools:
  • vpr: added support for show and screenshoting tasks.

Minor:

• Update remote code to honor constraints transmitted by the remote runner.
• Add fall back to package locking when file system locking is not available.
• Fixed handling of github artifact packages.
• Added build scripts for ubuntu22.
• Tools:
  • vpr: add reporting images to tool driver, these can be disabled via ['tool', 'vpr', 'task', 'place' or 'route', 'var', 'enable_images'] = 'false'.

Minor:

• Fixed handling of files with codec errors.
• Update package lock file handling to avoid race conditions in parallel flows.
• Tools:
  • yosys: minor code cleanup in FPGA flow.
  • vpr: add support for clock routing.
  • surelog: added wrapper comments in output file for parsing to indicate where segments of code came from.

Minor:

• Added a github data source to handle data from private repositories.
• Tools:
  • vpr: added pin metrics collection for FPGA flows.

Minor:

• Added keys to schema to track FPGA resources.
• Tools:
  • yosys: add metrics collection for FPGA flows.
  • vpr: added metrics collection for FPGA flows.

Minor:

• Tools:
  • openroad: fixed handling of pin constraints
  • yosys: updated to take advantange of native dont_use interfaces

Minor:

• Fix importing of package data from non libraries
• Fix unlocking behavior in schema keys

Minor:

• Fix handling of python module packages on older versions of python.

Major:

• Added support for handling soft libraries in the schema via ['option', 'library'] and updated all frontend task drivers to support these.

Minor:

• Ensure that libraries, which import a library, are handled correctly.

Minor:

• Added testing to ensure command line arguments are all checked for functionality and follow the schema pattern.
• Fixed python package lookup when the installed package does not match the name of the distribution.
• Added print controls to command line applications to allow custom arguments to be displayed along with schema values via the key sc_print:.
• Updated the conda environment and added testing to ensure functionality.

Minor:

• Fixed some issued identified by tclint.
• Added helper function to better detect locally installed and editable python packages for package registration.

Major:

• Moved from hosting third party pdks in SiliconCompiler to fully using lamdapdk.
• Added a demonstration target for gf180.

Minor:

• Tools:
  • vpr: added support for pin constraints.
  • openroad: added estimated routing congestion to the task image writing and updated fmax metric collection to use OpenROAD directly.

Major:

• Update file path hashing to include package information.

Minor:

• Tools:
  • yosys: update FPGA synthesis to better map LUTs and memories.
  • openroad: added option to control CTS with obstruction awareness via via ['tool', 'openroad', 'task', 'cts', 'var', 'cts_obstruction_aware'].
  • klayout: added operation to be able to rename cells in layout via ['tool', 'klayout', 'task', 'operations', 'var', 'operations', 'rename_cell'].

Major:

• Tools:
  • yosys: updated implementation for FPGA flow to better support flip-flop mapping and hard macro extraction and mapping.

Minor:

• Package downloading to ensure GitHub release artifacts can be downloaded from private repositories.

Major:

• Expanded and clarified the datasheet category of the schema.

Minor:

• Fixed resolving paths in package sources when paths contain environmental variables.

Minor:

• Fixed importing of libraries to collect package sources during import.
• Tools:
  • klayout: fixed loading of schema in the presence of other modules named schema.

Major:

• Added ['option', 'cache'] keypath to control the location of the cached data.
• Added support for Python 3.12

Major:

• Added ['package', 'source', '<name>', 'path'] and ['package', 'source', '<name>', 'ref'] to support directly downloading of required data for a design, pdk, library, etc.
• Removed support for $SCPATH and ['option', 'scpath'] in favor of using package sources.

Minor:

• Tools:
  • yosys: fixed handling of blackboxes during verilog reading, improved the sdc parsing to better estimate the clock for yosys-abc
  • OpenROAD: fixed PDN file handling to only read files once to avoid errors from redefining the same grids.

Minor:

• Removed unused ['flowgraph', '<graph>', '<step>', '<index>', 'valid'] field from schema.
• Tools:
  • klayout: fixed DEF to GDS generation by ensuring the correct units are used during DEF read in and fixes the stream writing to honor OASIS if requested.
  • OpenROAD: fixed handling of unidirectional layers in routing task and added tasks to support generating OpenRCX parasitic extraction decks.

Minor:

• Added line numbers to the error and warning log files to aid in tracking down the message in the main log.

Minor:

• Fixed incorrect settings when submitting remote jobs.

Major:

• Deprecated support for Python 3.6 and 3.7.
• Added ['option', 'from'], ['option', 'to'], and ['option', 'prune'] to better control the execution of the flowgraph.
• Removed leflib from SilconCompiler and use the standalone implementation provided via pip install sc-leflib.

Minor:

• Moved the built in server to use the Schema class for handling its settings.
• Fixed handling of Windows paths when submitting jobs from a Windows machine to a linux runner.
• Corrected the return behavior from the schema .get() to ensure lists are copied instead of being returned by reference.
• Fixed behavior where sc-show would require both step and index to be specified and allowed for directories to be specified as the show target.
• Tools:
  • yosys: Updated to support new ABC interface for passing along dont_use cells.
  • verilator: added support for assertions via ['tool', 'verilator', 'task', 'compile'/'lint', 'var', 'enable_assert']

Minor:

• Added -design to sc-dashboard and ensured common behavior between sc-show and sc-dashboard.
• Disabled sorting of keys in writing of the json schema to preserve the order in the original dictionary.
• Added an alias (siliconcompiler) to the commandline application sc to allow Windows users to be better able to use SiliconCompiler.
• Tools:
  • surelog: Ensure the bundled version is built using a static zlib library for Windows distribution.
  • OpenROAD: Added more controls over the heatmap image generation and to only write heatmaps with data available.

Minor:

• Fixes to sc-show for viewing remote files to ensure it does not attempt to use the file paths from the remote, but instead the local file paths.
• Tools:
  • klayout: Use build technology files and layer display files in show and ensure these are placed into the outputs directory when exporting to a GDS.

Minor:

• Fixes minor bug in the dashboard which prevented the launching the dashboard.
• Ensures all tool output goes through the logger.
• Improved implementation of .valid() to provide faster checking.
• Tools:
  • OpenROAD: fixed bugs in instance creation and pin access function calls. Implemented support for multiple library corners assigned to a single scenario in timing constraints.
  • yosys: Implemented support for multiple library corners assigned to a single scenario in timing constraints.

Major:

• Merged sc-configure into sc-remote to unify the remote interface

Minor:

• Fixed missing information in documentation build for flowgraphs.
• Removed call to delete_job on remote jobs, relying on remote to handle cleanup instead.
• Refactored core run functions for better code management.

Major:

• Updated schema to remove unused ['option', 'skipstep'] key and add record to store the remote job id in ['record', 'remoteid'].

Minor:

• Added additional error checking and file cleanup to remote run to ensure empty files are not left behind.
• Fixed handling of setting list of tuples in the schema to corrected parse the values.
• Tools:
  • OpenROAD - disabled timing optimizations by default, added support for generating report images in the screenshot task via ['tool', 'openroad', 'task', 'screenshot', 'var', 'include_report_images'].
  • Chisel - added support for handling build.sbt via the input fileset ['input', 'config', 'chisel'].

Major:

• Reworked FPGA to allow for better handling of FPGA parameters in the schema.
• Added missing mechanical parameters to the schema and updating the signal interface naming for clarity.
• Stop execution upon node failures, instead of continuing with repeated failures.

Minor:

• Ensure ['option', 'nodisplay'] is set when the environment does not support graphics.
• Added error checking for ['option', 'steplist'] to match current flowgraph.
• Removed physyn step from asicflow.
• Fixed issue when running remote and the submitted files are not updated.
• Tools:
  • OpenROAD - update default value for [..., 'var', 'grt_macro_extension'] to '0' to allow for better routing.
  • verilator - reworked options selection to allow for better control of user selected tool options.
  • yosys - added support for blackboxes in libraries via ['library', <lib>, 'output', 'blackbox', 'verilog'].

Major:

• Added graphs view to dashboard for comparing metrics across runs.
• Added sc-remote app for checking server status and interacting with running remote jobs (replaces sc-ping).

Minor:

• Added checkbox to dashboard for enabling "raw" view of manifest.
• Tools:
  • OpenROAD - made repair_design more verbose (requires updated version), added option to generate design images at end of task via ['tool', 'openroad', 'task', <task>, 'var', 'ord_enable_images'], tweaked pin placement behavior, added SDF file output to export task.
  • surelog - fixed driver to sanitize escape characters in Verilog output, added option to disable write cache via ['tool', 'surelog', 'task', 'parse', 'var', 'disable_write_cache'].
  • klayout - added option to allow missing cells in stream files via ['library', <lib>, 'option', 'var', 'klayout_allow_missing_cell'], added option to set DB units via ['pdk', <pdk>, 'var', 'klayout', 'units', <stackup>].

Minor:

• Improved remote run reliability, including graceful time-outs when server not responding and thread-safety fixes.
• Added ['option', 'libext'] support for Surelog, Verilator, and Icarus.
• Removed dashboard support for Python 3.6.
• Made aesthetic tweaks to dashboard.
• Fixed bundled Surelog on pre-macOS 12.
• Tools:
  • yosys - fixed synthesis strategies.
  • verilator - added multithreading, added FST trace format support.
  • OpenROAD - bumped minimum version to better support IR drop analysis, added additional controls for abstract LEF generation, updated scripts to improve ORFS correspondence, fixed to use correct layers for parasitic estimation.

Major:

• Added dashboard to SiliconCompiler to allow better inspection of the run information and added sc-dashboard app to open and display the dashboard.

Minor:

• Added ['input', 'constraint', 'upf'] as a recognized format
• Tools:
  • surelog - added support for lowmem option via ['tool', 'surelog', 'task', 'parse', 'var', 'enable_lowmem']

Major:

• Added new flow screenshotflow to enable generating high quality stream images via klayout and imagemagick/montage.
• Added new tool execute to enable executing the output of a previous task, such as in the case of compiling a binary in one step and executing it in the next.

Minor:

• sc-show fixed error handling when attempting to how a file without a manifest.
• Added support for pathlib.Path objects when setting file and dir type parameters in the manifest.
• Tools:
  • yosys - fixed marking liberty files dont_use and ensure each library is merged together for ABC. Updated driver to use lower case true/false for ['tool', 'openroad', 'task', '*', 'var'] to be consistent with other tools.
  • verilator - added support for pins-bv via ['tool', 'verilator', 'task', 'compile', 'var', 'pins_bv'] and compile modes via ['tool', 'verilator', 'task', 'compile', 'var', 'mode'].

Major:

• Added additional arguments to sc-show to provide access to specific steps and indices in the run.

Minor:

• Tools:
  • OpenROAD - added generation of separate timing and power reports in the reports/ directory to provide better insights into the design, added additional parameters to timing repair to enable minimizing total negative slack ['tool', 'openroad', 'task', 'place', 'var', 'rsz_repair_tns'], and added support for RTL-MP for macro placement.
  • yosys - added initial support for hierarchical synthesis via ['tool', 'yosys', 'task', 'syn_asic', 'var', 'hier_threshold'], this is disabled by default while it is still in development.

Major:

• Fixed writing of manifest to preserve values that were previously removed incorrectly.
• Updated recording of ['record', ...] to track tool versions, tool options, task start and end times, and SiliconCompiler version, while preserving control of sensitive records like ['record', 'ipaddr'] with ['option', 'track'].

Minor:

• Fixed handling of sc-issue to avoid clobbering the user set options and only bundle the required files for a testcase to minimize the size of the file.
• Added error checking for create_cmdline to check for invalid arguments.
• Tools:
  • OpenROAD - added support for disallowing one site gaps in detail placement ['tool', 'openroad', 'task', 'place', 'var', 'dpl_disallow_one_site']. Added support for ['option', 'warningoff']
  • surelog - Added support for ['option', 'warningoff']
  • Verilator - Added support for ['option', 'warningoff']

Major:

• Added/updated parameters in ['datasheet'] section of the schema to allow for better capturing of design datasheet.
• Updated Verilator tool driver to support CFLAGS/LDFLAGS and fix linting task.
• Added operations task to klayout to allow for unit operations on GDSs like merging, adding outlines, rotating, etc.
• Added options to archive() to support archiving multiple jobs and filtering files to include.

Minor:

• Added enforcement of ['option', 'mode'] to ensure it is set for better manifest checking.
• Added per-pin voltage constraints for better support of multiple power/voltage domains, ['constraint', 'timing', scenario, 'voltage', pin].
• Fixed tool drivers to ensure proper use of find_files() is not done in setup().
• Added check for permissions error while collecting child process memory statistics.

Major:

• Updated sc-issue to generate self-contained testcases to allow for better sharing of testcases.
• Updated klayout tool driver to support map-file option for DEF-GDS export step, and remove need for hard coded options in .lyt file in favor of getting values from the schema.

Minor:

• Updated loading order to target in commandline interface to ensure schema parameers are set before loading target.
• Error checking for flowgraphs with duplicated edges.
• Added -ext to sc-show command to control what file is opened when multiple files are available.
• Tools:
  • OpenROAD - added flags to control antenna repairs: ['tool', 'openroad', 'task', 'route', 'var', 'ant_check'] and ['tool', 'openroad', 'task', 'route', 'var', 'ant_repair']; added clock buffer selection option from the library with ['library', lib, 'option', 'openroad_cts_clock_buffer']

Major:

• Revamped documentation for better readability and navigability.

Minor:

• Fixed handling when loading schemas from JSON to ensure values are normalized correctly.
• When a tool fails, the last 10 lines of the log is printed when ['option', 'quiet'] is set to aid in debugging.
• Updated server/client to use python tarfile module instead of spawning subprocesses.
• Implemented python linting.
• Tools:
  • OpenROAD - implemented snapping to sites or manufacturing grid for component placement via ['tool', 'openroad', 'task', 'floorplan', 'var', 'ifp_snap_strategy'] and added ability to select SDC IO buffer for automatic constraint generation via ['tool', 'openroad', 'task', 'floorplan', 'var', 'sdc_buffer'].
  • yosys - fixed invalid keypath access when logiclib is incorrectly specified.

Major:

• sc-issue added as command line application to support sharing runnable testcases.
• Removed the requirement that the initial task of the flowgraph be called 'import' and the final task be called 'export'.
• Fully implemented .node() to take in a task module, simplifying the construction of a flowgraph and removing its dependence on ['option', 'scpath'].

Minor:

• ['tool', tool, version, 'sbom'] added to be able to track a tools SBOM.
• .hash_files() updated to honor the 'hash' field for the file parameters.
• .calc_yield(), .calc_area(), .calc_dpw() updated to new schema parameters.

Major:

• Support for Python 3.11
• Building arm64 wheels for surelog

Minor:

• Tools:
  • general - deployed docker based CI with automatic tool building and testing
  • klayout - support for OAS stream files via ['tool', 'klayout', 'task', 'export', 'var', 'stream'] = 'oas', better detection of missing layout cells
  • yosys - support for controlling buffer insertion via ['tool', 'yosys', 'task', 'syn_asic', 'var', 'add_buffers'] = 'True'/'False'
  • openroad - correct handling of INF timing in metrics
• Improve memory recording to account for child processes
• General documentation cleanup

Major:

• Adding ._record_metric() for tool drivers to use when recording metrics to ensure they honor the schema units and record the source of the metric at the same time.

Minor:

• Improved error handling and messaging for remote jobs.
• Fixed HTML summary report and PNG summary image not getting rebuilt when calling .summary()
• Updated .summary() table to display units and format numbers accordingly.

Major:

• Schema overhauled (see schema documentation for details):
  • Added ability to override certain schema parameters on a per-step/index basis.
  • Added step and index to schema access methods.
  • Expanded constraints category to include component and pin placement.
  • Cleaned up parameters which were duplicated in other categories.
  • Implemented ['input', ...] and ['output', ...] filesets along with .input() and .output() helper functions
• Added tasks to tools prevent step name from getting used for task identification.
• Implemented .use() in favor of .load_pdk(), .load_flow(), etc. to take in Python modules instead of strings.
• Changed libraries, flows, checklists, and pdks to explicitly return a particular class object.
• Generate a summary PNG.
• Removed Floorplanning API.
• Added support for custom macros and scripts in the remote workflow.

Minor:

• Updated OpenROAD scripts to support a hierarchical flow.
• Updated Yosys scripts to better support hierarchy.
• Improved auto documentation generation.
• Updated pdk and library settings to provide additional corners where available.
• Updated documentation, including Installation, Quickstart Guide and Tutorials.
• Added Fmax as a first-order metric to the Schema

Major:

• Fixed bug that causes tool setup information to be lost when running a flow in multiple chunks using a steplist.

Minor:

• Fixed old schema references in Yosys synthesis strategy scripts.
• Updated error message for missing file requirements.
• Updated OpenROAD scripts to handle multiple LEF files.
• Updated KLayout driver to use batch mode flag and capture more warnings.
• Updated Verilator driver to implement ['option', 'trace], ['option', 'warningoff'], and provide passthroughs for CFLAGS and LDFLAGS.
• Removed support for 'extraopts' passthrough in Verilator driver.
• Updated version of Surelog bundled with wheels distribution.

Minor:

• Schema: Added ['tool', <tool>, 'prescript'/'postscript', <step>, <index>] to support user-supplied pre- and post-scripts for script-based tools.
• Schema: Added ['tool', <tool>, 'file', <step>, <index>] passthrough parameter.
• Added runtime logic to terminate tools that do not exit on their own after a job is interrupted with ctrl-c.
• Fixed KLayout show bugs.
• Fixed issue building SC in editable mode using newer versions of Pip/setuptools.

Major:

• Changed run() logic to not reset metrics to zero.
  • summary() will only display metrics that have been explicitly set.

Minor:

• Schema: Changed ['constraint', <scenario>, 'libcorner'] from scalar to list.
• Added support for --latches option in GHDL driver.
• Added :keypath: directive to distributed Sphinx extensions.
• Added reports and final manifest to archive() outputs.
• Fixed bug where job argument to find_files() was not handled properly.
• Fixed pin sizes and PDN vias in Caravel wrapper example.
• Updated flow scripts to support newer version of OpenROAD.
• Updated version of Surelog bundled with wheels distribution.

Major:

• Added basic editing functionality for signoff checklists in HTML report.
• Changed file collection behavior:
  • For local runs, inputs are not copied into import/ at all.
  • For remote runs, inputs are copied into import/0/inputs/ only, not outputs/.
• Implemented ['option', 'entrypoint'], allowing users to specify an alternative top-level.
• Implemented support for "pure Python" tools.
  • A run() method inside a tool setup file will be run instead of an executable.

Minor:

• Changed run() behavior to read metrics from all leaf tasks.
• Fixed implementation of ['option', 'jobincr'].
• Fixed bug causing exception on summary() for machines with a default encoding other than UTF-8.
• Fixed logfile reading logic to gracefully handle invalid characters.
• Improved error messages for some common issues.

Major:

• Schema: Added ['option', 'flowcontinue'] to control whether flow continues when a tool reports errors.
  • This used to be controlled by ['tool', <tool>, 'continue'], but this parameter is meant to feed directly into tools (rather than controlling the SC runtime).
• Schema: Added ['option', 'continue'] parameter to control whether errors in the Python API are fatal.
  • The default value makes errors fatal, setting this parameter to True reverts to the old behavior.
• Added VPR-based FPGA bitstream generation flow.
• Added logic to set errors and warnings metrics based on ['tool', <tool>, 'regex', ...] matches. This reduces tool driver boilerplate and makes the metrics consistent with the generated regex match files.

Minor:

• Changed default technology target for sc app.
• Changed KLayout show script to always use a dark background.
• Changed check_manifest() to allow tool tasks to have multiple inputs (behaving as if they were merged with a "join" builtin).
• Changed check_manifest() to return True on success rather than 0 (the previous behavior didn't match the documentation).
• Changed Yosys and OpenROAD tool drivers to make them easier to use in flows with alternate step names.
• Changed GHDL tool driver to allow additional CLI options via ['tool', <tool>, 'var', ..., 'extraopts'].
• Removed return codes from post_process().

Major:

• Added input filetype inference based on file extension (restores functionality lost in 0.9.0).
• Added manifest tree viewer to HTML report.
• Added simulator exe compilation support to Verilator.
• Improved TCL manifest generation:
  • Fixed escaping of special characters and whitespace.
  • Fixed insertion of "$env" in filepaths.
  • Changed tuple printing to be TCL list instead of tuple-like string.

Minor:

• Schema: Added tool CLI arguments to ['record', ...] schema.
• Changed create_cmdline() switchlist parameter to accept switch names as specified on command line.
• Changed setup module docs generator to be packaged with SC.
• Changed HTML report to be self-contained.
• Fixed CSV manifest generation.

Major:

• Schema: Reorganized entire schema! Changes summarized below:
  • Cleaned and consolidated top-level organization, most parameters are now nested.
  • Moved build configuration options underneath ['option', ...].
  • Added ['output', ...] to store pointers to flow outputs.
  • Added ['model', ...] to store pointers to design abstractions (timing libraries, layouts, etc).
  • Added ['datasheet', ...] to store information about design's interface.
  • Added ['unit', ...] to store user driven SI units specification (temp,voltage, etc)
  • Renamed ['eda', ...] to ['tool', ...]
  • Renamed ['mcmm', ...] to ['constraint', ...]
  • Replaced ['source'], ['constraint'], and ['read', ...] with more flexible ['input', <filetype>] to supply input files.
  • Added support for storing multiple PDKs in schema and selecting which one to use for run (analogous to flows).
  • Change ['flowgraph'] to support modular flow composition
  • Added support for package management ['depgrah'].
  • Added checklist support.
  • Removed special ['library', ...] keypaths. All libraries are now created as Chip objects, and have their full config imported into a parent chip's schema.
• Added 'sup' packaging utility
• Added ability to configure stdout and stderr redirection on a per-tool basis (thanks to @suppamax for implementing).
• Added flexible tool version checking based on PEP-440 standard, now enabled by default.
• Added 'clean' feature for cleaning up intermediate tool outputs.
• Added 'resume' feature for restarting failed flows (for debugging).
• Added automatic capture of peak memory usage (adds dependency on psutil).
• Changed ['design'] to be a required parameter for instantiating a Chip.
• Changed error behavior to consistently raise exceptions rather than exit.
• Removed tool script copy feature, so now all EDA scripts are run from the reference directory.

Minor:

• Schema: Added ability to store per-parameter designer notes.
• Added offline wheels distribution.
• Added read_lef() function to help with PDK bring-up.
• Added environment variables to replay scripts.
• Added LVS/DRC signoff flow and top-level GDS stream out flow.
• Added native support for Sky130 I/O library, along with Heartbeat + padring example.
• Changed internals to minimize SC performance overhead with large flowgraphs.
• Changed task runtime tracking to distinguish between time spent in tool and total time.
• Fixed breakpoints to work more consistently across tools.

Note: Since there was no public release of version 0.8.0, this list summarizes all changes since 0.7.0.

Major:

• Schema: Added ability to specify environment variables on a per-tool, per-task basis.
• Schema: Added per-tool 'techmap' parameter to library schema.
• Added browser-viewable report generation to core.summary().

Minor:

• Schema: Added filetypes to library schema: 'def', 'gerber', 'netlist', 'model' category.
• Schema: Added 'stackup' key to library lef/gds parameters.
• Schema: Changed 'pdk' and 'stackup' library parameters to lists.
• Schema: Added 'dir' passthrough to library schema.
• Schema: Added 'nodisplay' option to schema to better support headless jobs.
• Schema: Added 'licensefile' to package parameters to support non-standard licenses.
• Schema: Added 'gerber' to read schema.
• Schema: Added several cell categories to library schema.
• Changed how PDK-specific Yosys and OpenROAD parameters are driven to avoid hardcoding process info in tool drivers.
• Fixed step ordering bug in core.summary().
• Fixed bug with how 'arg', 'index' is handled.
• Fixed small bugs in automatic documentation generation.
• Added core.check_filepaths() helper.

Major:

• Schema: Added 'flow' key to flowgraph to enable multi-flow targets.
• Schema: Added 'flow' parameter to enable selection between flows in flowgraph.
• Schema: Changed '_' separated tuple target to a single 'module' load target.
• Schema: Added 'regex' for grep like functionality.
• Schema: Changed metal grid to use PDK metal name as the major key.
• Schema: Added 'tool' key to PDK settings to avoid tool file conflicts.
• Schema: Added 'units' parameter to enable tech agnostic SDC.
• Schema: Added ability to specify tricky apr setup files on a per tool basis (tracks, taps, vias, antenna, etc).
• Schema: Added checklist functionality
• Added core.grep function
• Added core.check_logfile function to core API to emulate grep behavior
• Added core.load_{target, flow, lib, pdk} functions to core API in place of target()
• Added asap7 target
• Added docker support for basic RTL2GDS tool chain
• Removed core.target() function

Minor:

• Schema: Changed lib 'driver' to move into cells (consistency)
• Schema: Added site symmetry to avoid full lef parser.
• Schema: Changed tool version switch to a list
• Schema: Changed 'asic', 'targetlib' to 'asic', 'logiclib' for clarity.
• Schema: Changed 'eda, 'report' parameter guideline to always use 'metric' as keyword
• Schema: Added -skip_check option to speed up new target bringup
• Schema: Added -skip_step option to enable skipping specific steps
• Schema: Added 'pdk', ['file', 'directory', 'variable'] parameters to enable tool-specific PDK setups.
• Schema: Changed cell types to be hardcoded (tapcell, buf, clkbuf, etc) to avoid fragmentation.

Minor:

• Fix bug in Yosys parameter requirements spec that made check_manifest() too strict

Major:

• Schema: Add 'tool' key to PDK fields
• Schema: Remove unneeded 'record' keys
• Implement automatic record-keeping
• Implement checks that flow make sense in terms of file I/O and that required files resolve
• Allow importing multiple files with the same basename

Minor:

• Automatically configure KLayout path on macOS
• Allow importing multiple files with the same basename
• Implement -I CLI switch for include directory

Minor:

• Fix sc-show on Windows.

Major:

• Schema: add 'read' section.
• Schema: Add alternate frontend support.

Minor:

• Fix old version of Surelog bundled with wheels

Minor:

• Fix: Prevent sc-show crash when PDK files are not found.
• Fix: Ensure sc-show can find KLayout executable on Windows

Major:

• First public release!!!