wrong comparison involving NaN values in Windows

Name: swC45995 Date: 10/07/96


In Windows java incorrectly performs comparison operations involving NaN
values. For example, execution of the following test:

public class test
{
public static void main(String argv[])
{
float zero = 0.0f;

System.out.println(zero >= Float.NaN == !(zero < Float.NaN));
System.out.println(Float.NaN > 3.14f);
System.out.println(Float.NaN >= 12.63d);
System.out.println(Double.MIN_VALUE <= Float.NaN);
System.out.println(Float.NaN > Double.NaN);
}
}

produces the following results:

true
true
true
true
true

instead of expected:

false
false
false
false
false

======================================================================



As of 1.1beta2, the output of this test on WinNT is:

true
false
false
false
false

That is, better, but not fixed yet.

timothy.lindholm@Eng 1996-12-16