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 }