Date: Sat, 1 Mar 2003 17:25:27 -0800 (PST) From: Milo Hyson <milo@cyberlifelabs.com> To: FreeBSD-gnats-submit@FreeBSD.org Subject: ports/48825: java.lang.Math.pow() broken in native JDK 1.3.1 patchset 8 Message-ID: <200303020125.h221PRI5040399@unit0.iddb.cyberlifelabs.com>
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>Number: 48825
>Category: ports
>Synopsis: java.lang.Math.pow() broken in native JDK 1.3.1 patchset 8
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-ports-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Mar 01 17:30:13 PST 2003
>Closed-Date:
>Last-Modified:
>Originator: Milo Hyson
>Release: FreeBSD 4.5-RELEASE i386
>Organization:
CyberLife Labs, LLC
>Environment:
System: FreeBSD unit0.iddb.cyberlifelabs.com 4.5-RELEASE FreeBSD 4.5-RELEASE #0: Wed Oct 23 13:39:42 PDT 2002 root@unit0.iddb.cyberlifelabs.com:/usr/src/sys/compile/IDDB-20021023 i386
>Description:
Calling java.lang.Math.pow() under patchset 8 of the native 1.3.1 JDK yields incorrect results in certain cases. The following tests were performed:
2^10 = 0
2^5 = 0
2^1 = 2
2^0.5 = 1.414214
2^0 = 1
2^-0 = 1
2^-0.5 = 0
2^-1 = 0.5
2^-5 = 0
2^-10 = 0
-2^10 = 1024
-2^5 = -32
-2^1 = -2
-2^0.5 = NaN
-2^0 = 1
-2^-0 = 1
-2^-0.5 = NaN
-2^-1 = -0.5
-2^-5 = -0.03125
-2^-10 = 9.765625E-4
>How-To-Repeat:
Run the following code:
public class TestPow
{
public static void main(String args[]) throws Exception
{
System.out.println("Math.pow(2.0,10.0) = " + Math.pow(2.0,10.0));
}
}
It prints the following:
Math.pow(2.0,10.0) = 0.0
It should print the following:
Math.pow(2.0,10.0) = 1024.0
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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