public class Test2 {

  static boolean foo(double i) {
    return isNaN(i) || !isNaN(Double.NaN);
  }

  public static void main (String[] args) {
    // boolean b = isNaN(Double.NaN);
    // System.out.println (" b = " + b);
    System.out.println("isNaN(Double.Nan) = " + isNaN(Double.NaN));
    System.out.println("isNaN(Double.Nan) = " + isNaN(Double.NaN));
  }
  
  private static boolean isNaN (double v) {
    return (v != v);
  }
}

The test does pass in product version.


running the above code on V8 cpu in debug mode generates the following assert:
#
# HotSpot Virtual Machine Error, assertion failure
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
#
# assert(VM_Version::v9_instructions_work(), "v9 float only works on v9")
#
# Error ID: /export/sail1/jdk1.3_b17/hotsparc-1.3-b17/src/cpu/sparc/vm/assembler_sparc.hpp, 309 [ Unknown ]
#
# Problematic Thread: prio=1 tid=0x3e018 nid=0x1 runnable
#
Executed on: jtg-s210, running 5.8 Generic_109291-02 sun4m sparc SUNW,SPARCstation-5