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

 *

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 * 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.

 *

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package org.graalvm.compiler.hotspot.amd64;

import static org.graalvm.compiler.hotspot.amd64.AMD64HotSpotMathIntrinsicOp.IntrinsicOpcode.COS;

import static org.graalvm.compiler.hotspot.amd64.AMD64HotSpotMathIntrinsicOp.IntrinsicOpcode.LOG;

import static org.graalvm.compiler.hotspot.amd64.AMD64HotSpotMathIntrinsicOp.IntrinsicOpcode.LOG10;

import static org.graalvm.compiler.hotspot.amd64.AMD64HotSpotMathIntrinsicOp.IntrinsicOpcode.SIN;

import static org.graalvm.compiler.hotspot.amd64.AMD64HotSpotMathIntrinsicOp.IntrinsicOpcode.TAN;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_64;

import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;

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

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

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

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

import org.graalvm.compiler.debug.GraalError;

import org.graalvm.compiler.graph.NodeClass;

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

import org.graalvm.compiler.lir.Variable;

import org.graalvm.compiler.lir.gen.LIRGeneratorTool;

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodes.ConstantNode;

import org.graalvm.compiler.nodes.NodeView;

import org.graalvm.compiler.nodes.ValueNode;

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

import org.graalvm.compiler.nodes.spi.LIRLowerable;

import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;

import org.graalvm.compiler.replacements.nodes.UnaryMathIntrinsicNode.UnaryOperation;

import jdk.vm.ci.meta.Value;

@NodeInfo(nameTemplate = "X87MathIntrinsic#{p#operation/s}", cycles = CYCLES_64, size = SIZE_1)

public final class AMD64X87MathIntrinsicNode extends UnaryNode implements LIRLowerable {

    public static final NodeClass<AMD64X87MathIntrinsicNode> TYPE = NodeClass.create(AMD64X87MathIntrinsicNode.class);

    protected final UnaryOperation operation;

    protected AMD64X87MathIntrinsicNode(ValueNode value, UnaryOperation op) {

        super(TYPE, op.computeStamp(value.stamp(NodeView.DEFAULT)), value);

        assert value.stamp(NodeView.DEFAULT) instanceof FloatStamp && PrimitiveStamp.getBits(value.stamp(NodeView.DEFAULT)) == 64;

        this.operation = op;

    }

    @Override

    public Stamp foldStamp(Stamp valueStamp) {

        return operation.computeStamp(valueStamp);

    }

    @Override

    public void generate(NodeLIRBuilderTool generator) {

        LIRGeneratorTool gen = generator.getLIRGeneratorTool();

        Value input = generator.operand(getValue());

        Variable result = gen.newVariable(LIRKind.combine(input));

        switch (operation) {

            case SIN:

                gen.append(new AMD64HotSpotMathIntrinsicOp(SIN, result, gen.asAllocatable(input)));

                break;

            case COS:

                gen.append(new AMD64HotSpotMathIntrinsicOp(COS, result, gen.asAllocatable(input)));

                break;

            case TAN:

                gen.append(new AMD64HotSpotMathIntrinsicOp(TAN, result, gen.asAllocatable(input)));

                break;

            case LOG:

                gen.append(new AMD64HotSpotMathIntrinsicOp(LOG, result, gen.asAllocatable(input)));

                break;

            case LOG10:

                gen.append(new AMD64HotSpotMathIntrinsicOp(LOG10, result, gen.asAllocatable(input)));

                break;

            default:

                throw GraalError.shouldNotReachHere();

        }

        generator.setResult(this, result);

    }

    @Override

    public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) {

        if (forValue.isConstant()) {

            return ConstantNode.forDouble(operation.compute(forValue.asJavaConstant().asDouble()));

        }

        return this;

    }

    @NodeIntrinsic

    public static native double compute(double value, @ConstantNodeParameter UnaryOperation op);

}