Public bug reported:
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
** Affects: openjdk-lts (Ubuntu)
Importance: Critical
Status: New
** Summary changed:
- [Regression] AArch64: Math.log intrinsic gives incorrect results
+ [Regression] AArch64: log and cos/sin intrinsics give incorrect results
** Description changed:
- $ cat LogTest.java
- public class LogTest {
+ 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) {
- double x = 4.9E-324;
- System.out.println(Math.log(x));
- System.out.println(StrictMath.log(x));
+ System.out.println(Math.cos(1647100));
}
}
+
$ javac LogTest.class
With 10.0.2+13-1ubuntu1 (correct):
- $ java LogTest
+ $ java LogTest
-744.4400719213812
-744.4400719213812
With 11~28-3ubuntu1 (incorrect):
- $ java LogTest
+ $ 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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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1796982
Title:
[Regression] AArch64: log and cos/sin intrinsics give incorrect
results
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https://bugs.launchpad.net/ubuntu/+source/openjdk-lts/+bug/1796982/+subscriptions
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