[arm] add trim_64 util function
[arm] add trim_64 util function

moreati/pydgin,cornell-brg/pydgin,moreati/pydgin,futurecore/pydgin,cornell-brg/pydgin,cornell-brg/pydgin,futurecore/pydgin,moreati/pydgin,futurecore/pydgin,cornell-brg/pydgin,moreati/pydgin,futurecore/pydgin