rounds an integer up or down to the nearest multiple of 2 ^ shift . works with both positive and negative integers . concode_field_sep PlaceHolder placeHolder concode_field_sep int roundDown concode_elem_sep int roundUp
int function ( int arg0 , int arg1 ) { return ( arg0 + ( 1 << ( arg1 - 1 ) ) ) >>> arg1 << arg1 ; }