from ieee754.fpcommon.fpbase import FPOpIn, FPOpOut
from ieee754.fpcommon.fpbase import Trigger
-from nmutil.singlepipe import (StageChain, SimpleHandshake)
+from nmutil.singlepipe import StageChain
from ieee754.fpcommon.fpbase import FPState, FPID
from ieee754.fpcommon.getop import (FPGetOp, FPADDBaseData, FPGet2Op)