[Bug 1796982] Re: [Regression] AArch64: log and cos/sin intrinsics give incorrect results

[dann frazier]

** 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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