tests/kaffe/DoubleConst.java

   1 /**
   2  * Ensure that Double and Float compile time constants are correctly
   3  * compiled.
   4  *
   5  * @author: Edouard G. Parmelan <egp@free.fr> */
   6 public class DoubleConst
   7 {
   8     static void test (String title, float value, int expect)
   9     {
  10         int got = Float.floatToIntBits (value);
  11
  12         if (got != expect) {
  13             System.out.println (title
  14                                 + " expect " + Integer.toString (expect, 16)
  15                                 + " got " + Integer.toString (got, 16)
  16                                 );
  17         }
  18     }
  19
  20     static void test (String title, double value, long expect)
  21     {
  22         long got = Double.doubleToLongBits (value);
  23
  24         if (got != expect) {
  25             System.out.println (title
  26                                 + " expect " + Long.toString (expect, 16)
  27                                 + " got " + Long.toString (got, 16)
  28                                 );
  29         }
  30     }
  31
  32     public static void main (String args[])
  33     {
  34         System.out.println("Float tests:");
  35         test ("POSITIVE_INTINITY", Float.POSITIVE_INFINITY, 0x7f800000);
  36         test ("NEGATIVE_INTINITY", Float.NEGATIVE_INFINITY, 0xff800000);
  37         test ("NaN", Float.NaN, 0x7fc00000);
  38         test ("MIN_VALUE", Float.MIN_VALUE, 0x00000001);
  39         test ("MAX_VALUE", Float.MAX_VALUE, 0x7f7fffff);
  40
  41         System.out.println("Double tests:");
  42         test ("POSITIVE_INTINITY", Double.POSITIVE_INFINITY, 0x7ff0000000000000L);
  43         test ("NEGATIVE_INTINITY", Double.NEGATIVE_INFINITY, 0xfff0000000000000L);
  44         test ("NaN", Double.NaN, 0x7ff8000000000000L);
  45         test ("MIN_VALUE", Double.MIN_VALUE, 0x0000000000000001L);
  46         test ("MAX_VALUE", Double.MAX_VALUE, 0x7fefffffffffffffL);
  47
  48     }
  49 }
  50
  51 /* Expected output:
  52 Float tests:
  53 Double tests:
  54 */