I thought "conseil constitutionnel" on the judicial branch + "conseil d'état" on the administrative branch (french law is split in two branches), but apparently

I thought "conseil constitutionnel" on the judicial branch + "conseil d'état" on the administrative branch (french law is split in two branches), but apparently the "conseil constitutionnel" is doing both, the split is "cour de cassation" (supreme court) + "conseil d'état" (administrative supreme court), with the conseil constitutionnel doing its thing upstream unrelated to any of them.