1 /*

     2  * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 

    25 package org.graalvm.compiler.nodes.util;

    26 

    27 import org.graalvm.compiler.core.common.type.IntegerStamp;

    28 import org.graalvm.compiler.nodes.LogicNode;

    29 import org.graalvm.compiler.nodes.NodeView;

    30 import org.graalvm.compiler.nodes.ValueNode;

    31 

    32 public abstract class IntegerHelper {

    33     protected final int bits;

    34 

    35     protected IntegerHelper(int bits) {

    36         this.bits = bits;

    37     }

    38 

    39     public abstract long upperBound(IntegerStamp stamp);

    40 

    41     public abstract long lowerBound(IntegerStamp stamp);

    42 

    43     public int compare(long a, long b) {

    44         return rawCompare(cast(a), cast(b));

    45     }

    46 

    47     public boolean isGreater(long a, long b) {

    48         return compare(a, b) > 0;

    49     }

    50 

    51     public boolean isSmaller(long a, long b) {

    52         return compare(a, b) < 0;

    53     }

    54 

    55     public boolean isGreaterEqual(long a, long b) {

    56         return compare(a, b) >= 0;

    57     }

    58 

    59     public boolean isSmallerEqual(long a, long b) {

    60         return compare(a, b) <= 0;

    61     }

    62 

    63     public long min(long a, long b) {

    64         return rawMin(cast(a), cast(b));

    65     }

    66 

    67     public long max(long a, long b) {

    68         return rawMax(cast(a), cast(b));

    69     }

    70 

    71     public abstract long cast(long a);

    72 

    73     public abstract long minValue();

    74 

    75     public abstract long maxValue();

    76 

    77     public abstract IntegerStamp stamp(long min, long max);

    78 

    79     public abstract LogicNode createCompareNode(ValueNode x, ValueNode y, NodeView view);

    80 

    81     protected abstract int rawCompare(long a, long b);

    82 

    83     protected abstract long rawMin(long a, long b);

    84 

    85     protected abstract long rawMax(long a, long b);

    86 }