Date: Sun, 6 Jan 2019 20:09:27 +0100 From: Thomas Gude <thgude@googlemail.com> To: "java@freebsd.org" <java@FreeBSD.org> Subject: Bug in openjdk8 8.192.26_1 ? Message-ID: <7B0150C2-2E2D-46C1-9C8E-C1D5D50BD60E@googlemail.com>
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Hi all,
while researching a malfunction in the OpenHAB Astro binding, I think I =
found a bug in the Math.asin() implementation of openjdk8-8.192.26_1. =
Please have a look at the provided test programme (CheckMathIssue.java) =
and the results provided in the other attached file (comparison.log). It =
lists the output of four different java implementations:
FreeBSD 11.2 openjdk8-8.192.26
FreeBSD 11.2 openjdk8-8.172.*
MacOS 10.14 (Build 1.8.0_192-b12)
Linux-OSMC 4.14 Java 8.191
The first one is obviously giving wrong values.
Is this a bug or do you have any other idea why this may happen?
Thank you and kind regards,
Thomas Gude.
--Apple-Mail=_9874CA48-989F-4B1A-912E-E11BEDB8981E
Content-Disposition: attachment;
filename=CheckMathIssue.java
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name="CheckMathIssue.java"
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public class CheckMathIssue {
public static void main(String[] args) {
System.out.println("Operating System: " + System.getProperty("os.name")
+ " " + System.getProperty("os.arch")
+ " " + System.getProperty("os.version"));
System.out.println("Java: " + System.getProperty("java.version")
+ " " + System.getProperty("java.vendor"));
System.out.println("Java Specification: " + System.getProperty("java.specification.name")
+ " " + System.getProperty("java.specification.vendor")
+ " " + System.getProperty("java.specification.version"));
System.out.println("Java VM: " + System.getProperty("java.vm.version")
+ " " + System.getProperty("java.vm.vendor"));
System.out.println("Java VM Specification: " + System.getProperty("java.vm.specification.name")
+ " " + System.getProperty("java.vm.specification.vendor")
+ " " + System.getProperty("java.vm.specification.version"));
double value1 = Math.asin(0.5);
double value2 = Math.asin(-0.38147821481517075);
double value3 = StrictMath.asin(0.5);
double value4 = StrictMath.asin(-0.38147821481517075);
System.out.println("asin(0.5)= " + value1);
System.out.println("asin(-0.38147821481517075)= " + value2);
System.out.println("StrictMath asin(0.5)= " + value3);
System.out.println("StrictMath asin(-0.38147821481517075)= " + value4);
}
}
--Apple-Mail=_9874CA48-989F-4B1A-912E-E11BEDB8981E
Content-Disposition: attachment;
filename=comparison.log
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name="comparison.log"
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Operating System: FreeBSD amd64 11.2-STABLE
Java: 1.8.0_192 Oracle Corporation
Java Specification: Java Platform API Specification Oracle Corporation 1.8
Java VM: 25.192-b26 Oracle Corporation
Java VM Specification: Java Virtual Machine Specification Oracle Corporation 1.8
asin(0.5)= 0.5
asin(-0.38147821481517075)= -0.38147821481517075
StrictMath asin(0.5)= 0.5
StrictMath asin(-0.38147821481517075)= -0.38147821481517075
Operating System: FreeBSD amd64 11.2-STABLE
Java: 1.8.0_172 Oracle Corporation
Java Specification: Java Platform API Specification Oracle Corporation 1.8
Java VM: 25.172-b11 Oracle Corporation
Java VM Specification: Java Virtual Machine Specification Oracle Corporation 1.8
asin(0.5)= 0.5235987755982989
asin(-0.38147821481517075)= -0.391394915510742
StrictMath asin(0.5)= 0.5235987755982989
StrictMath asin(-0.38147821481517075)= -0.391394915510742
Operating System: Mac OS X x86_64 10.14.2
Java: 1.8.0_192 Oracle Corporation
Java Specification: Java Platform API Specification Oracle Corporation 1.8
Java VM: 25.192-b12 Oracle Corporation
Java VM Specification: Java Virtual Machine Specification Oracle Corporation 1.8
asin(0.5)= 0.5235987755982989
asin(-0.38147821481517075)= -0.391394915510742
StrictMath asin(0.5)= 0.5235987755982989
StrictMath asin(-0.38147821481517075)= -0.391394915510742
Operating System: Linux arm 4.14.78-2-osmc
Java: 1.8.0_191 Oracle Corporation
Java Specification: Java Platform API Specification Oracle Corporation 1.8
Java VM: 25.191-b12 Oracle Corporation
Java VM Specification: Java Virtual Machine Specification Oracle Corporation 1.8
asin(0.5)= 0.5235987755982989
asin(-0.38147821481517075)= -0.391394915510742
StrictMath asin(0.5)= 0.5235987755982989
StrictMath asin(-0.38147821481517075)= -0.391394915510742
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