allan.jacobs@Eng 1997-02-28

Math.abs(-0.0f) returns -0.0f. Math.abs(-0.0d) returns -0.0d
in violation of the Java Spec. Turning on the JIT fixes the problem.

algol% cat zero.java

class zero {
        public static void main( String[] argv ) {
                float fz = -0.0F;
                double dz = -0.0D;
                System.out.println( Math.abs(fz) );
                System.out.println( Math.abs(dz) );
        }
}
algol% javac zero.java
algol% java -Djava.compiler=none zero
-0.0
-0.0
algol% java -Djava.compiler=sunwjit zero
0.0
0.0