Author: luc
Date: Tue Mar 26 14:56:01 2013
New Revision: 1461159
URL: http://svn.apache.org/r1461159
Log:
FastMath.abs() without branching for float and double primitive types.
JIRA: MATH-954
Modified:
commons/proper/math/trunk/src/main/java/org/apache/commons/math3/util/FastMath.java
Modified:
commons/proper/math/trunk/src/main/java/org/apache/commons/math3/util/FastMath.java
URL:
http://svn.apache.org/viewvc/commons/proper/math/trunk/src/main/java/org/apache/commons/math3/util/FastMath.java?rev=1461159&r1=1461158&r2=1461159&view=diff
==============================================================================
---
commons/proper/math/trunk/src/main/java/org/apache/commons/math3/util/FastMath.java
(original)
+++
commons/proper/math/trunk/src/main/java/org/apache/commons/math3/util/FastMath.java
Tue Mar 26 14:56:01 2013
@@ -3011,10 +3011,7 @@ public class FastMath {
* @return abs(x)
*/
public static float abs(final float x) {
- if ((Float.floatToRawIntBits(x) & Integer.MIN_VALUE) == 0) {
- return x;
- }
- return -x;
+ return Float.intBitsToFloat(Integer.MAX_VALUE &
Float.floatToRawIntBits(x));
}
/**
@@ -3023,10 +3020,7 @@ public class FastMath {
* @return abs(x)
*/
public static double abs(double x) {
- if ((Double.doubleToRawLongBits(x) & Long.MIN_VALUE) == 0) {
- return x;
- }
- return -x;
+ return Double.longBitsToDouble(Long.MAX_VALUE &
Double.doubleToRawLongBits(x));
}
/**
