From 839130d338248aff186e7f0e7e9c80f0e93a6c91 Mon Sep 17 00:00:00 2001
From: Sebastian Bazley <sebb@apache.org>
Date: Wed, 19 Jan 2011 18:29:45 +0000
Subject: [PATCH] MATH-479 FastMath.signum(-0.0) does not agree with
 Math.signum(-0.0) (tests already added as part of math483)

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/branches/MATH_2_X@1060895 13f79535-47bb-0310-9956-ffa450edef68
---
 src/main/java/org/apache/commons/math/util/FastMath.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/org/apache/commons/math/util/FastMath.java b/src/main/java/org/apache/commons/math/util/FastMath.java
index b2e9a56eb..6f1cc9f10 100644
--- a/src/main/java/org/apache/commons/math/util/FastMath.java
+++ b/src/main/java/org/apache/commons/math/util/FastMath.java
@@ -579,7 +579,7 @@ public class FastMath {
      * @return -1, 0, +1 or NaN depending on sign of a
      */
     public static double signum(final double a) {
-        return (a < 0.0) ? -1.0 : ((a > 0.0) ? 1.0 : (Double.isNaN(a) ? Double.NaN : 0.0));
+        return (a < 0.0) ? -1.0 : ((a > 0.0) ? 1.0 : a);
     }
 
     /** Compute next number towards positive infinity.