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1.6 KiB
1.6 KiB
Additional prerequisites
- ghdl with the LLVM or GCC backend
- ghdl-yosys-plugin
git clone https://github.com/antonblanchard/microwatt
cd microwatt;
git apply ../0001-WIP.patch
cd -
Usage
# Enter virtual environment
poetry shell # Activate virtual environment
python ./run.py --help
# Exit virtual environment
exit
Example
In run.py, we check that Microwatt is able to retire one instruction.
Let's find the minimal number of clock cycles to reach this state:
python run.py --mode=cover --pre=20 --post=20
SBY 13:58:23 [smoke_tb] engine_0: ## 0:00:29 Reached cover statement at /home/jf/src/power-fv/cores/microwatt/./run.py:29 ($1) in step 9.
SBY 13:58:23 [smoke_tb] engine_0: ## 0:00:29 Writing trace to VCD file: engine_0/trace0.vcd
In BMC mode, the pre-condition will indeed be unreachable at step 8:
python ./run.py --mode=bmc --pre=8 --post=8
SBY 14:08:17 [smoke_tb] engine_0: ## 0:00:14 Checking assumptions in step 8..
SBY 14:08:20 [smoke_tb] engine_0: ## 0:00:17 Assumptions are unsatisfiable!
SBY 14:08:20 [smoke_tb] engine_0: ## 0:00:17 Status: PREUNSAT
SBY 14:08:20 [smoke_tb] engine_0: finished (returncode=1)
SBY 14:08:20 [smoke_tb] engine_0: Status returned by engine: ERROR
But it will be reachable at step 9:
python ./run.py --mode=bmc --pre=9 --post=9
SBY 14:11:13 [smoke_tb] engine_0: ## 0:00:15 Checking assumptions in step 9..
SBY 14:11:25 [smoke_tb] engine_0: ## 0:00:27 Checking assertions in step 9..
SBY 14:11:26 [smoke_tb] engine_0: ## 0:00:27 Status: passed