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# VeriFuzz [](https://travis-ci.com/ymherklotz/verifuzz)
Verilog Fuzzer to test the major verilog compilers by generating random, valid
verilog.
It currently supports the following synthesisers:
- [Yosys](http://www.clifford.at/yosys/)
- [Xst](https://www.xilinx.com/support/documentation/sw_manuals/xilinx11/ise_c_using_xst_for_synthesis.htm)
- [Vivado](https://www.xilinx.com/products/design-tools/ise-design-suite.html)
- [Quartus](https://www.intel.com/content/www/us/en/programmable/downloads/download-center.html)
and the following simulator:
- [Icarus Verilog](http://iverilog.icarus.com)
## Reported bugs
- **MS** :: Mis-synthesis
- **C** :: Crash
### Yosys
| Type | Issue | Confirmed | Fixed | |
|------|------------------------------------------------------------|-----------|-------|---|
| MS | [Issue 1047](https://github.com/YosysHQ/yosys/issues/1047) | ✓ | ✓ | |
| MS | [Issue 997](https://github.com/YosysHQ/yosys/issues/997) | ✓ | ✓ | |
| C | [Issue 993](https://github.com/YosysHQ/yosys/issues/993) | ✓ | ✓ | |
### Vivado
| Type | Issue | Confirmed | Fixed |
|------|-----------------------------------------------------------------------------------------------------|-----------|-------|
| C | https://forums.xilinx.com/t5/Synthesis/Vivado-2019-1-Verilog-If-statement-nesting-crash/td-p/981787 | | |
## Build the Fuzzer
The fuzzer is split into an executable (in the [app](/app) folder) and a
library (in the [src](/src) folder). To build the executable, you will need
[stack](https://docs.haskellstack.org/en/stable/README/) installed. Building
directly using [cabal-install](https://www.haskell.org/cabal/download.html) is
possible but not recommended and not directly supported.
To build the executable:
```
stack build
```
To run the executable:
```
stack exec verifuzz
```
To install the executable (which defaults to installing it in `~/.local`):
```
stack install
```
## Running tests
There are two test-suites that currently test the library. One of the
test-suites tests the random code generation and generation of the acyclic
graph. It also contains some property based tests for this. The other test-suite
uses `doctest` to test the examples that are in the documentation.
To run the test-suites:
```
stack test
```
|
