From 145cc675d35b677157eb6d3ef57c1104dd5142e2 Mon Sep 17 00:00:00 2001
From: Gilles Sadowski <erans@apache.org>
Date: Fri, 17 Jan 2014 10:53:00 +0000
Subject: [PATCH] MATH-1089 Slightly simpler implementation.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1559067 13f79535-47bb-0310-9956-ffa450edef68
---
 src/main/java/org/apache/commons/math3/util/Precision.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/apache/commons/math3/util/Precision.java b/src/main/java/org/apache/commons/math3/util/Precision.java
index 441e015ac..7b02c1677 100644
--- a/src/main/java/org/apache/commons/math3/util/Precision.java
+++ b/src/main/java/org/apache/commons/math3/util/Precision.java
@@ -60,6 +60,8 @@ public class Precision {
     private static final long SGN_MASK = 0x8000000000000000L;
     /** Offset to order signed double numbers lexicographically. */
     private static final int SGN_MASK_FLOAT = 0x80000000;
+    /** Positive zero. */
+    private static final double POSITIVE_ZERO = 0d;
 
     static {
         /*
@@ -396,7 +398,7 @@ public class Precision {
                    .setScale(scale, roundingMethod))
                    .doubleValue();
             // MATH-1089: negative values rounded to zero should result in negative zero
-            return rounded == 0.0 ? rounded * FastMath.copySign(1d, x) : rounded;
+            return rounded == POSITIVE_ZERO ? POSITIVE_ZERO * x : rounded;
         } catch (NumberFormatException ex) {
             if (Double.isInfinite(x)) {
                 return x;