JDK14/Java14源码在线阅读

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 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package org.graalvm.compiler.lir.amd64;

import static jdk.vm.ci.amd64.AMD64.xmm0;
import static org.graalvm.compiler.lir.amd64.AMD64HotSpotHelper.registersToValues;

import org.graalvm.compiler.core.common.LIRKind;
import org.graalvm.compiler.lir.LIRInstructionClass;
import org.graalvm.compiler.lir.Variable;
import org.graalvm.compiler.lir.gen.LIRGeneratorTool;

import jdk.vm.ci.amd64.AMD64Kind;
import jdk.vm.ci.code.Register;
import jdk.vm.ci.code.RegisterValue;
import jdk.vm.ci.meta.Value;

/**
 * AMD64MathIntrinsicUnaryOp assumes that the input value is stored at the xmm0 register, and will
 * emit the output value into the xmm0 register as well.
 * {@link #emitLIRWrapper(LIRGeneratorTool, Value)} is provided for emitting necessary mov LIRs
 * before and after this LIR instruction.
 */
public abstract class AMD64MathIntrinsicUnaryOp extends AMD64LIRInstruction {

    @Def protected Value output;
    @Use protected Value input;
    @Temp protected Value[] temps;

    public AMD64MathIntrinsicUnaryOp(LIRInstructionClass<? extends AMD64MathIntrinsicUnaryOp> type, Register... registers) {
        super(type);

        input = xmm0.asValue(LIRKind.value(AMD64Kind.DOUBLE));
        output = xmm0.asValue(LIRKind.value(AMD64Kind.DOUBLE));

        temps = registersToValues(registers);
    }

    public final Variable emitLIRWrapper(LIRGeneratorTool gen, Value value) {

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