code: /*
   * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package sun.misc;
  
  /**
   * This class contains additional constants documenting limits of the
   * <code>float</code> type.
   *
   * @author Joseph D. Darcy
   */
  
  public class FloatConsts {
      /**
       * Don't let anyone instantiate this class.
       */
      private FloatConsts() {}
  
      public static final float POSITIVE_INFINITY = java.lang.Float.POSITIVE_INFINITY;
      public static final float NEGATIVE_INFINITY = java.lang.Float.NEGATIVE_INFINITY;
      public static final float NaN = java.lang.Float.NaN;
      public static final float MAX_VALUE = java.lang.Float.MAX_VALUE;
      public static final float MIN_VALUE = java.lang.Float.MIN_VALUE;
  
      /**
       * A constant holding the smallest positive normal value of type
       * <code>float</code>, 2<sup>-126</sup>.  It is equal to the value
       * returned by <code>Float.intBitsToFloat(0x00800000)</code>.
       */
      public static final float   MIN_NORMAL      = 1.17549435E-38f;
  
      /**
       * The number of logical bits in the significand of a
       * <code>float</code> number, including the implicit bit.
       */
      public static final int SIGNIFICAND_WIDTH   = 24;
  
      /**
       * Maximum exponent a finite <code>float</code> number may have.
       * It is equal to the value returned by
       * <code>Math.ilogb(Float.MAX_VALUE)</code>.
       */
      public static final int     MAX_EXPONENT    = 127;
  
      /**
       * Minimum exponent a normalized <code>float</code> number may
       * have.  It is equal to the value returned by
       * <code>Math.ilogb(Float.MIN_NORMAL)</code>.
       */
      public static final int     MIN_EXPONENT    = -126;
  
      /**
       * The exponent the smallest positive <code>float</code> subnormal
       * value would have if it could be normalized.  It is equal to the
       * value returned by <code>FpUtils.ilogb(Float.MIN_VALUE)</code>.
       */
      public static final int     MIN_SUB_EXPONENT = MIN_EXPONENT -
                                                     (SIGNIFICAND_WIDTH - 1);
  
      /**
       * Bias used in representing a <code>float</code> exponent.
       */
      public static final int     EXP_BIAS        = 127;
  
      /**
       * Bit mask to isolate the sign bit of a <code>float</code>.
       */
      public static final int     SIGN_BIT_MASK   = 0x80000000;
  
      /**
       * Bit mask to isolate the exponent field of a
       * <code>float</code>.
       */
      public static final int     EXP_BIT_MASK    = 0x7F800000;
  
      /**
       * Bit mask to isolate the significand field of a
       * <code>float</code>.
       */
      public static final int     SIGNIF_BIT_MASK = 0x007FFFFF;
  
      static {
          // verify bit masks cover all bit positions and that the bit
          // masks are non-overlapping
          assert(((SIGN_BIT_MASK | EXP_BIT_MASK | SIGNIF_BIT_MASK) == ~0) &&
                 (((SIGN_BIT_MASK & EXP_BIT_MASK) == 0) &&
                  ((SIGN_BIT_MASK & SIGNIF_BIT_MASK) == 0) &&
                  ((EXP_BIT_MASK & SIGNIF_BIT_MASK) == 0)));
      }
  }
  