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

}