https://git.libre-soc.org/?p=soc.git;a=blob;f=src/soc/fu/alu/main_stage.py;h=b2d2279cf80dec3670d70e5b65359c92a9794acf;hb=29d0566fd104ab8b9ffd0c460fc7c588a72a340b#l50 example. here instead of op.is_32bit, the "L" field is used instead, manually decoded. this tends to suggest a shortcoming in the design, particularly that it is power_decode.py and the CSV files that are supposed to do this job.