Change Similarity to use SmallFloat for norm encoding

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@349073 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -356,6 +356,11 @@ Optimizations
     and sorting the first time on a field.
     (Yonik Seeley, LUCENE-454)
 
+11. Optimized and generalized 32 bit floating point to byte
+    (custom 8 bit floating point) conversions.  Increased the speed of
+    Similarity.encodeNorm() anywhere from 10% to 250%, depending on the JVM.
+    (Yonik Seeley, LUCENE-467)
+
 Infrastructure
 
  1. Lucene's source code repository has converted from CVS to

src/java/org/apache/lucene/util/SmallFloat.java

@@ -21,7 +21,7 @@ package org.apache.lucene.util;
  * @author yonik
  * @version $Id$
  */
-class SmallFloat {
+public class SmallFloat {
 
   /** Converts a 32 bit float to an 8 bit float.
    * <br>Values less than zero are all mapped to zero.