T. Meissner 74b3bda2de | 4 years ago | |
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.github/workflows | 5 years ago | |
formal | 4 years ago | |
issues | 4 years ago | |
sim | 5 years ago | |
src | 4 years ago | |
.gitignore | 4 years ago | |
LICENSE.md | 5 years ago | |
README.md | 4 years ago | |
psl_with_ghdl.sublime-project | 4 years ago |
A collection of examples of using PSL for functional and formal verification of VHDL designs with GHDL (and Yosys / SymbiYosys).
This is a project with the purpose to get a current state of PSL implementation in GHDL. It probably will find unsupported PSL features, incorrect implemented features or simple bugs like GHDL crashs.
It is also intended for experiments with PSL when learning the language. You can play around with the examples, as they are pretty simple. You can comment out failing assertions if you want to have a successful proof or simulation if you want. You can change them to see what happens.
It is recommended to use an up-to-date version of GHDL as potential bugs are fixed very quickly. Especially the synthesis feature of GHDL is very new and still beta. You can build GHDL from source or use one of the Docker images which contain also the SymbiYosys toolchain. For example the ghdl/synth:formal
image from Docker Hub. Beware, the Docker images aren't build every day, so it is possible that tests are failing until the image is updated.
You can use my Dockerfiles for SymbiYosys & GHDL(-synth) to build the docker image on your own machine. Then you have a Docker image with the latest tool versions.
Have fun!
The next lists will grow during further development
assert
directivecover
directiveassume
directive (synthesis)restrict
directive (synthesis)always
operatornever
operator->
)next
operatornext[n]
operatornext_a[i to j]
operatornext_e[i to j]
operatornext_event
operatornext_event[n]
operatornext_event_e[i to j]
operatoruntil
operatoruntil_
operatorbefore
operator (GHDL crash with a specific invalid property, see PSL before example)eventually!
operator;
):
)|->
)|=>
)[*]
, [+]
, [*n]
, [*i to j]
)[=n]
, [=i to j]
)[->]
, [->n]
, [->i to j]
)&&
)&
)|
)within
operatorprev()
function (Synthesis only, see prev() example)stable()
function (Synthesis only, see stable() example)rose()
function (Synthesis only, see rose() example)fell()
function (Synthesis only, see fell() example)forall
statementprev()
, stable()
,rose()
& fell()
are implemented for synthesis)before_
operator (Seems that LHS & RHS of operator have to be active at same cycle, see psl_before.vhd)next_event_a[i to j]
operatoreventually!
behaviour with liveness proofs, see GHDL issue 1345