/*

 * Copyright (c) 2003, 2016, 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

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package jdk.internal.math;

/**

 * This class contains additional constants documenting limits of the

 * {@code float} type.

 *

 * @author Joseph D. Darcy

 */

public class FloatConsts {

    /**

     * Don't let anyone instantiate this class.

     */

    private FloatConsts() {}

    /**

     * The number of logical bits in the significand of a

     * {@code float} number, including the implicit bit.

     */

    public static final int SIGNIFICAND_WIDTH   = 24;

    /**

     * The exponent the smallest positive {@code float} subnormal

     * value would have if it could be normalized.

     */

    public static final int     MIN_SUB_EXPONENT = Float.MIN_EXPONENT -

                                                   (SIGNIFICAND_WIDTH - 1);

    /**

     * Bias used in representing a {@code float} exponent.

     */

    public static final int     EXP_BIAS        = 127;

    /**

     * Bit mask to isolate the sign bit of a {@code float}.

     */

    public static final int     SIGN_BIT_MASK   = 0x80000000;

    /**

     * Bit mask to isolate the exponent field of a

     * {@code float}.

     */

    public static final int     EXP_BIT_MASK    = 0x7F800000;

    /**

     * Bit mask to isolate the significand field of a

     * {@code float}.

     */

    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)));

    }

}