History

mjoekhan 4fc765f912 UVM track: seed uvm/, docs, and hello_uvm example Standalone muhammadjawadkhan/iverilog-uvm project setup. Documents that this fork is experimental and must not PR UVM work to steveicarus/iverilog. Seeds uvm/ from IVL_UVM and adds roadmap/status workflow docs plus a smoke example.		2026-07-21 16:14:00 +05:00
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depot	UVM track: seed uvm/, docs, and hello_uvm example	2026-07-21 16:14:00 +05:00
ivl_uvm_intf_gen	UVM track: seed uvm/, docs, and hello_uvm example	2026-07-21 16:14:00 +05:00
ivl_uvm_regress	UVM track: seed uvm/, docs, and hello_uvm example	2026-07-21 16:14:00 +05:00
ivl_uvm_src	UVM track: seed uvm/, docs, and hello_uvm example	2026-07-21 16:14:00 +05:00
ivl_uvm_std_ovl	UVM track: seed uvm/, docs, and hello_uvm example	2026-07-21 16:14:00 +05:00
ivl_uvm_tests	UVM track: seed uvm/, docs, and hello_uvm example	2026-07-21 16:14:00 +05:00
ivl_uvm_vpi/ivl_vlog_lint	UVM track: seed uvm/, docs, and hello_uvm example	2026-07-21 16:14:00 +05:00
scripts	UVM track: seed uvm/, docs, and hello_uvm example	2026-07-21 16:14:00 +05:00
FORK_NOTE.md	UVM track: seed uvm/, docs, and hello_uvm example	2026-07-21 16:14:00 +05:00
README.md	UVM track: seed uvm/, docs, and hello_uvm example	2026-07-21 16:14:00 +05:00
setup.csh	UVM track: seed uvm/, docs, and hello_uvm example	2026-07-21 16:14:00 +05:00

README.md

Welcome to IVL_UVM project

It is a humble attempt to implement some of the basic UVM features on open-source Icarus Verilog simulator and eventually port it to Verilator as well.

Given the light-weight support of SystemVerilog by Icarus as of Dec 2020, IVL_UVM code base is also very rudimentary compared to Accellera UVM implementation. We hope to continue enhancing it as and when the Icarus SV support improves.

It is very important to note that current support is very, very limited and is just a start. We have staretd with:

Basic Messaging support
Command Line Processor features
UVM Test feature

Feel free to try it out and send constructive comments via Discussion forum/Issues. Any inappropriate comments shall be deleted without any notice whatsoever.

As of now, IVL_UVM runs on latest/development build of Icarus (and NOT the stable v11.0 branch). Should you need the v11.0 support, feel free to raise a request, we will see if that is doable.

Setup

Please ensure to setup IVL_UVM path via the setup.csh, in CSH/TCSH do:

source setup.csh

Many scripts/Makefiles refer to an env-variable that's set via this setup file.

To run basic tests, do:

cd ivl_uvm_regress/run_dir
make vw0
make vw1
make vw2

Thanks for trying this IVL_UVM code base.

ABV support via OVL

Assertion Based Verificaiton (ABV) is a powerful technique used by both RTL designers and Verification engineers. Accellera OVL (Open Verificaiton Library) was developed to provide a set of ready-to-use library elements with assertions for common elements/behaviors. We now comppiled OVL with Icarus and did some small clean-up in this release. Further TODOs are below:

Integrate UVM reporting
Tighter controf of MAX_QUIT_COUNT in more-UVM-like manner (than compile time in old OVL)
Better debug

To run simple OVL demo, do:

cd ivl_uvm_tests/ivl_uvm_ovl_demo/ivl_uvm_ovl_alw
make

Cheers