Author: sebb
Date: Fri Apr 20 21:08:41 2012
New Revision: 1328501
URL: http://svn.apache.org/viewvc?rev=1328501&view=rev
Log:
Document why we are not using the simpler Hex constants
Modified:
commons/proper/math/trunk/src/main/java/org/apache/commons/math3/util/Precision.java
Modified:
commons/proper/math/trunk/src/main/java/org/apache/commons/math3/util/Precision.java
URL:
http://svn.apache.org/viewvc/commons/proper/math/trunk/src/main/java/org/apache/commons/math3/util/Precision.java?rev=1328501&r1=1328500&r2=1328501&view=diff
==============================================================================
---
commons/proper/math/trunk/src/main/java/org/apache/commons/math3/util/Precision.java
(original)
+++
commons/proper/math/trunk/src/main/java/org/apache/commons/math3/util/Precision.java
Fri Apr 20 21:08:41 2012
@@ -40,12 +40,17 @@ public class Precision {
* In IEEE 754 arithmetic, this is 2<sup>-53</sup>: {@value}.
*/
public static final double EPSILON =
Double.longBitsToDouble((EXPONENT_OFFSET - 53l) << 52);
+ //This was previously expressed as = 0x1.0p-53;
+ // However, OpenJDK (Sparc Solaris) cannot handle such small constants:
MATH-721
+
/**
* Safe minimum, such that {@code 1 / SAFE_MIN} does not overflow.
* In IEEE 754 arithmetic, this is also the smallest normalized
* number 2<sup>-1022</sup>: {@value}.
*/
public static final double SAFE_MIN =
Double.longBitsToDouble((EXPONENT_OFFSET - 1022l) << 52);
+ // This was previously expressed as = 0x1.0p-1022;
+ // However, OpenJDK (Sparc Solaris) cannot handle such small constants:
MATH-721
/** Offset to order signed double numbers lexicographically. */
private static final long SGN_MASK = 0x8000000000000000L;
