/*

 * Copyright (c) 2018, 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.util;

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.nodes.LogicNode;

import org.graalvm.compiler.nodes.NodeView;

import org.graalvm.compiler.nodes.ValueNode;

import org.graalvm.compiler.nodes.calc.IntegerBelowNode;

import jdk.vm.ci.code.CodeUtil;

public class UnsignedIntegerHelper extends IntegerHelper {

    public UnsignedIntegerHelper(int bits) {

        super(bits);

    }

    @Override

    public long upperBound(IntegerStamp stamp) {

        assert stamp.getBits() == bits;

        return stamp.unsignedUpperBound();

    }

    @Override

    public long lowerBound(IntegerStamp stamp) {

        assert stamp.getBits() == bits;

        return stamp.unsignedLowerBound();

    }

    @Override

    protected int rawCompare(long a, long b) {

        return Long.compareUnsigned(a, b);

    }

    @Override

    protected long rawMin(long a, long b) {

        return NumUtil.minUnsigned(a, b);

    }

    @Override

    protected long rawMax(long a, long b) {

        return NumUtil.maxUnsigned(a, b);

    }

    @Override

    public long cast(long a) {

        return CodeUtil.zeroExtend(a, bits);

    }

    @Override

    public long minValue() {

        return 0;

    }

    @Override

    public long maxValue() {

        return NumUtil.maxValueUnsigned(bits);

    }

    @Override

    public IntegerStamp stamp(long min, long max) {

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

    }

    @Override

    public LogicNode createCompareNode(ValueNode x, ValueNode y, NodeView view) {

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

    }

}