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