Release Notes for Icarus Verilog 0.8

The quick link for the impatient: <>.

This release represents for Icarus Verilog continuing progress towards standards compliance guided by practical need. In other words, I and my co-workers use it in our daily work and we need it to be compatible with other tools that we use. The choices that led to this release are also consequences of common requests from users or would-be users, and occasionally in the interests of friendly vendors.

What is Icarus Verilog 0.8

The current release is a considerable improvement over the previous stable release. It includes 20 months of fixes and language coverage improvements. Obviously, the complete list of changes is far to vast to list explicitly. For a complete history of changes, see the release notes for individual snapshots between the 0.7 and 0.8 releases. But here is a brief list of highlights:
This is necessarily a vague list. If you want to know if your particular feature has been added between 0.7 and 0.8, the best I can say is to try it and see.

Getting Icarus Verilog 0.8

The Icarus Verilog home page is <>. The home page has links to various versions, including the main 0.8 directory here: <>. The FTP repository includes the main source distribution, and precompiled packages for a variety of different systems. New binaries are added as packages are contributed by volunteer porters. Absense of binaries for your system does not mean your system type is not supported. More likely, it means it is a system that I do not have in my office, and no one has contributed a pre-made package. In that case, compile from the source.

Known Limitations of Icarus Verilog 0.8

Icarus Verilog 0.8 is not perfect. It works reliably for many engineers, but there are limitations, including but not limited to:

Where It's Going

Early on, I harbored plans to move towards System Verilog. However, that standard seems to have turned into a dumping ground for every feature under the sun, so those plans have been dropped. Still, subject to personal priorities, I plan to continue developing Icarus Verilog for the forseeable future. There is still plenty of Verilog-2001 standards compliance work to do, and look out for new features to track emerging Verilog standards.

This page is Copyright 2004 Stephen Williams

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