question: atomic type hash code generation . concode_field_sep int MULTIPLIER concode_elem_sep JCHashCodeCalculator s_aInstance concode_elem_sep int HASHCODE_NULL concode_field_sep placeholderType placeHolder
target: int function ( final int arg0 , final double arg1 ) { return append ( arg0 , arg1 == 0.0 ? 0L : Double . doubleToLongBits ( arg1 ) ) ; }