Projects / Signs


Signs is a development environment for hardware designs in various hardware description languages. The tackled tasks are compilation, synthesis, simulation, and testing of designs. Due to the integration of these main areas, it provides the ability to debug designs in an all-embracing manner by switching between source code, netlist, and simulation. Supported languages include VHDL and the ISCAS benchmark format. Signs comes in two flavors: a command-line only version useful for processing and analyzing large netlists and as an Eclipse plugin for hardware design and simulation.

Operating Systems

Recent releases

  •  10 Jan 2007 16:26

    Release Notes: While the release focus is clearly on bugfixes, there are also some feature improvements, such as enhanced test bench support and improved netlist and simulator views. The VHDL compiler has support for subprograms now and elaboration of big designs is much faster because of improved context handling. Internally, the intermediate representation layer was cleaned up, so intermediate objects form a proper tree now.

    •  23 Jun 2006 17:36

      Release Notes: Besides many bugfixes, this release features an improved Eclipse plugin that includes a new Signs console, autobuilder improvements, and outline view navigation. The VHDL compiler has support for attribute elaboration and VHDL87 style file declarations, and reports precise source locations for netlist annotations and error messages. New features in this release include an experimental Berkeley SIS interface, BLIF netlist output, adder and comparator generation, and better support for test benches.

      •  05 May 2006 23:44

        Release Notes: NAND/NOR tree generation for ISCAS netlists has been fixed, (limited) support for selected signal assignment elaboration has been added, CLA (adder) generation has been fixed, the netlist viewer has additional toolbar buttons to access dump and netlist processing functions from the Eclipse plugin, mouse signal selection has been fixed, and the Ant build script is no longer missing from the source distribution.

        •  28 Apr 2006 06:31

          Release Notes: This release includes a new JavaCC based VHDL parser that supports a much bigger VHDL subset than before. The GUI has been removed and instead a Signs Eclipse plugin is offered for design entry and exploration. Furthermore, Signs can dump out (and quickly read back in) intermediate library files and netlists. For computer-aided testing, the ATPG and Faultsim modules have been vastly improved.

          •  10 Dec 2005 06:07

            Release Notes: This release featured lots of ATPG/Faultsim bugfixes and a much improved netlist viewer, which handles busses correctly. Performance of the handling of large netlists was improved.


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