Some sun.misc internal APIs are deprectaed in JDK 9 and will be encapsulated or removed in a future release.
FDBigInt halfUlp = constructPow52( B5, Ulp2 ); if ( (cmpResult = diff.cmp( halfUlp ) ) < 0 ){
Sval = constructPow52( S5, S2 ); Mval = constructPow52( M5, M2 );