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Message #13220
[Bug 1796982] Re: [Regression] AArch64: log and cos/sin intrinsics give incorrect results
** Also affects: openjdk-lts (Ubuntu Cosmic)
Importance: Critical
Status: New
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https://bugs.launchpad.net/bugs/1796982
Title:
[Regression] AArch64: log and cos/sin intrinsics give incorrect
results
Status in openjdk-lts package in Ubuntu:
New
Status in openjdk-lts source package in Cosmic:
New
Bug description:
Upstream bug: https://bugs.openjdk.java.net/browse/JDK-8211105
$ cat LogTest.java
public class LogTest {
public static void main(String[] args) {
double x = 4.9E-324;
System.out.println(Math.log(x));
System.out.println(StrictMath.log(x));
}
}
$ cat CosTest.java
public class CosTest {
public static void main(String[] args) {
System.out.println(Math.cos(1647100));
}
}
$ javac LogTest.class
With 10.0.2+13-1ubuntu1 (correct):
$ java LogTest
-744.4400719213812
-744.4400719213812
With 11~28-3ubuntu1 (incorrect):
$ java LogTest
-710.989276736877
-744.4400719213812
$ javac CosTest.class
With 10.0.2+13-1ubuntu1 (correct):
$ java CosTest
0.7833030468809974
With 11~28-3ubuntu1 (incorrect):
$ java CosTest
-0.2745634094819721
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References