001    /*
002     *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003     *
004     *  This file is licensed to You under the Eclipse Public License (EPL);
005     *  You may not use this file except in compliance with the License. You
006     *  may obtain a copy of the License at
007     *
008     *      http://www.opensource.org/licenses/eclipse-1.0.php
009     *
010     *  See the COPYRIGHT.txt file distributed with this work for information
011     *  regarding copyright ownership.
012     */
013    package org.jikesrvm.runtime;
014    
015    import org.vmmagic.pragma.Entrypoint;
016    
017    /**
018     * Placeholder for constants that are accessed from
019     * generated code.
020     */
021    public class MathConstants {
022      /*
023       * Constants that are used by the compilers in generated code.
024       */
025      @Entrypoint
026      static final double I2Dconstant = Double.longBitsToDouble(0x4330000080000000L);
027      @Entrypoint
028      static final double IEEEmagic = Double.longBitsToDouble(0x4338000000000000L);
029      @Entrypoint
030      static final long longOne = 1L;
031      @Entrypoint
032      static final float minusOne = -1.0F;
033      @Entrypoint
034      static final float zero = 0.0F;
035      @Entrypoint
036      static final float half = 0.5F;
037      @Entrypoint
038      static final float one = 1.0F;
039      @Entrypoint
040      static final float two = 2.0F;
041      @Entrypoint
042      static final double zeroD = 0.0;
043      @Entrypoint
044      static final double oneD = 1.0;
045      @Entrypoint
046      static final float half32 = java.lang.Float.intBitsToFloat(0x2f800000);
047      @Entrypoint
048      static final float two32 = java.lang.Float.intBitsToFloat(0x4f800000);
049      @Entrypoint
050      static final double billionth = 1e-9;
051    
052      /** largest double that can be rounded to an int */
053      @Entrypoint
054      static final double maxint = 0.5D + 0x7FFFFFFF;
055      /** largest double that can be rounded to a long */
056      @Entrypoint
057      static final double maxlong = 0.5D + 0x7FFFFFFFFFFFFFFFL;
058      /** largest float that can be rounded to an int (0x7FFFFFFF) */
059      @Entrypoint
060      static final float maxintF = java.lang.Float.intBitsToFloat(0x4F000000);
061      /** largest float that can be rounded to a long (0x7FFFFFFFFFFFFFFF) */
062      @Entrypoint
063      static final float maxlongF = java.lang.Float.intBitsToFloat(0x5F000000);
064    
065      // smallest double that can be rounded to an int
066      @Entrypoint
067      static final double minint = (double) Integer.MIN_VALUE;
068    }