vecElemProjectCast :: DynFlags -> PrimOpVecCat -> Width -> Maybe MachOp
vecElemProjectCast _      FloatVec _   =  Nothing
vecElemProjectCast :: DynFlags -> PrimOpVecCat -> Width -> Maybe MachOp
vecElemProjectCast _      FloatVec _   =  Nothing
vecElemProjectCast _      FloatVec _   =  Nothing