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 * Copyright (c) 2011, 2017, 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.

 *

 * 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 org.graalvm.compiler.nodes.calc;

import org.graalvm.compiler.core.common.NumUtil;

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

import org.graalvm.compiler.core.common.type.StampFactory;

import org.graalvm.compiler.graph.Node;

import org.graalvm.compiler.graph.NodeClass;

import org.graalvm.compiler.graph.spi.CanonicalizerTool;

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodes.LogicNode;

import org.graalvm.compiler.nodes.NodeView;

import org.graalvm.compiler.nodes.ValueNode;

import jdk.vm.ci.code.CodeUtil;

@NodeInfo(shortName = "|<|")

public final class IntegerBelowNode extends IntegerLowerThanNode {

    public static final NodeClass<IntegerBelowNode> TYPE = NodeClass.create(IntegerBelowNode.class);

    private static final BelowOp OP = new BelowOp();

    public IntegerBelowNode(ValueNode x, ValueNode y) {

        super(TYPE, x, y, OP);

        assert x.stamp(NodeView.DEFAULT) instanceof IntegerStamp;

        assert y.stamp(NodeView.DEFAULT) instanceof IntegerStamp;

    }

    public static LogicNode create(ValueNode x, ValueNode y, NodeView view) {

        return OP.create(x, y, view);

    }

    public static LogicNode create(ConstantReflectionProvider constantReflection, MetaAccessProvider metaAccess, OptionValues options, Integer smallestCompareWidth, ValueNode x, ValueNode y,

                    NodeView view) {

        LogicNode value = OP.canonical(constantReflection, metaAccess, options, smallestCompareWidth, OP.getCondition(), false, x, y, view);

        if (value != null) {

            return value;

        }

        return create(x, y, view);

    }

    @Override

    public Node canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) {

        NodeView view = NodeView.from(tool);

        ValueNode value = OP.canonical(tool.getConstantReflection(), tool.getMetaAccess(), tool.getOptions(), tool.smallestCompareWidth(), OP.getCondition(), false, forX, forY, view);

        if (value != null) {

            return value;

        }

        return this;

    }

    public static class BelowOp extends LowerOp {

        @Override

        protected CompareNode duplicateModified(ValueNode newX, ValueNode newY, boolean unorderedIsTrue, NodeView view) {

            assert newX.stamp(NodeView.DEFAULT) instanceof IntegerStamp && newY.stamp(NodeView.DEFAULT) instanceof IntegerStamp;

            return new IntegerBelowNode(newX, newY);

        }

        @Override

        protected long upperBound(IntegerStamp stamp) {

            return stamp.unsignedUpperBound();

        }

        @Override

        protected long lowerBound(IntegerStamp stamp) {

            return stamp.unsignedLowerBound();

        }

        @Override

        protected int compare(long a, long b) {

            return Long.compareUnsigned(a, b);

        }

        @Override

        protected long min(long a, long b) {

            return NumUtil.minUnsigned(a, b);

        }

        @Override

        protected long max(long a, long b) {

            return NumUtil.maxUnsigned(a, b);

        }

        @Override

        protected long cast(long a, int bits) {

            return CodeUtil.zeroExtend(a, bits);

        }

        @Override

        protected long minValue(int bits) {

            return 0;

        }

        @Override

        protected long maxValue(int bits) {

            return NumUtil.maxValueUnsigned(bits);

        }

        @Override

        protected IntegerStamp forInteger(int bits, long min, long max) {

            return StampFactory.forUnsignedInteger(bits, min, max);

        }

        @Override

        }

        @Override

        protected IntegerLowerThanNode createNode(ValueNode x, ValueNode y) {

            return new IntegerBelowNode(x, y);

        }

    }

}