diff options
Diffstat (limited to 'src/library')
| -rw-r--r-- | src/library/scala/collection/mutable/HashTable.scala | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/src/library/scala/collection/mutable/HashTable.scala b/src/library/scala/collection/mutable/HashTable.scala index bb15788bdf..81e42f86b3 100644 --- a/src/library/scala/collection/mutable/HashTable.scala +++ b/src/library/scala/collection/mutable/HashTable.scala @@ -360,14 +360,14 @@ trait HashTable[A, Entry >: Null <: HashEntry[A, Entry]] extends HashTable.HashU protected def elemEquals(key1: A, key2: A): Boolean = (key1 == key2) - // Note: - // we take the most significant bits of the hashcode, not the lower ones - // this is of crucial importance when populating the table in parallel - protected final def index(hcode: Int) = { + /** + * Note: we take the most significant bits of the hashcode, not the lower ones + * this is of crucial importance when populating the table in parallel + */ + protected final def index(hcode: Int): Int = { val ones = table.length - 1 - val improved = improve(hcode, seedvalue) - val shifted = (improved >> (32 - java.lang.Integer.bitCount(ones))) & ones - shifted + val exponent = Integer.numberOfLeadingZeros(ones) + (improve(hcode, seedvalue) >>> exponent) & ones } protected def initWithContents(c: HashTable.Contents[A, Entry]) = { |