Simple code to debug JDK9 float point issue

FloatDebug.java

// javac whetstc.java
// java whetstc


import java.util.*;
import java.io.*;

public class FloatDebug 
{

    private static double TimeUsed;
    private static float x,y,z;
    private static float[] e1 = new float[4];
    private static float Check;
    private static float mwips;
    private static double[] loop_time = new double[9];
    private static double[] loop_mops = new double[9];
    private static double[] loop_mflops = new double[9];
    private static float[] results = new float[9];
    private static String[] titles = new String[9];
    private static int[] num = new int[4];

    private static int wwidth  = 500;
    private static int wheight = 325;

    private static String xout;
    private static double runTime;
    private static double mflops;

    private static int section ;
    private static int runit = 1;
    private static int printit = 0;

    private static int x100 = 100;
    
    public static void main(String[] args) 
    {
        section = -1;

        System.out.println("Float point debug code, get exit code using $? after execution");

        if (runit == 1)
        {
            TimeUsed = 0.0; 
            for (section=1; section<9; section++)
            {
                whetstones();
            }
       }     

    }

    public static void whetstones() 
    {
        double startTime;
        double endTime;
        int i, j, k, l, ix, xtra, n1mult;
        
        float t  =  0.49999975f;
        float t0 = t;  
        float t1 = 0.50000025f;
        float t2 = 2.0f;

        int n1 = 12*x100;
        int n2 = 14*x100;
        int n3 = 345*x100;
        int n4 = 210*x100;
        int n5 = 32*x100;
        int n6 = 899*x100;
        int n7 = 616*x100;
        int n8 = 93*x100;
               
        num[0] = 0;
        num[1] = 1;
        num[2] = 2;
        num[3] = 3;

        switch (section)
        {
        case 1:

        // Section 1, Array elements
        
        n1mult = 10;
        
        e1[0] =  1.0f;
        e1[1] = -1.0f;
        e1[2] = -1.0f;
        e1[3] = -1.0f;                   

        runTime = 0.0;
        xtra = 10;
        do
        {
            if (runTime > 0.2)
            {
                xtra = xtra * 5;
            }
            else if (runTime > 0.5)
            {
                xtra = xtra * 2;
            }
            else
            {
                xtra = xtra * 10;
            }
            startTime = getTime();
            for (ix=0; ix<xtra; ix++)
            {
                for(i=0; i<n1*n1mult; i++)
                {
                    e1[0] = (e1[0] + e1[1] + e1[2] - e1[3]) * t;
                    e1[1] = (e1[0] + e1[1] - e1[2] + e1[3]) * t;
                    e1[2] = (e1[0] - e1[1] + e1[2] + e1[3]) * t;
                    e1[3] = (-e1[0] + e1[1] + e1[2] + e1[3]) * t;
                }
                t = 1.0f - t;
                if (ix == 0) results[section] = e1[3];
            }
            t =  t0;                    
            endTime = getTime();
            runTime = endTime - startTime;
            System.out.printf("startTime: %f endTime: %f runTime: %f\n", startTime, endTime, runTime );
        }
        while (runTime < 1.0);
        
        Check = Check + e1[3];
        loop_time[section] = runTime / (double)n1mult / (double)xtra;
        loop_mflops[section] = (double)(n1*16) / 1000000.0 / loop_time[section];
        loop_mops[section] = 0.0;
        titles[section] = "N1 floating point";
        TimeUsed = TimeUsed + loop_time[section];
        break;

        }              
    }

    public static double getTime()
    {
            double q;
            long itime;
            itime = System.currentTimeMillis();
            if(itime<1000000) {
                System.exit(1);
            }
            //System.out.printf("time long value %d\n", itime);
            q = (double) itime;
            if(q < 1.0f) {
                System.exit(5);
            }
            //System.out.printf("time float value %f\n", q);
            return q / 1000.0;
    }

}