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package com.oracle.svm.core.graal.aarch64;
import static jdk.vm.ci.code.ValueUtil.asRegister;
import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
import org.graalvm.compiler.asm.aarch64.AArch64Address;
import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
import org.graalvm.compiler.lir.LIRInstructionClass;
import org.graalvm.compiler.lir.aarch64.AArch64LIRInstruction;
import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
import org.graalvm.word.Pointer;
import com.oracle.svm.core.SubstrateUtil;
import com.oracle.svm.core.graal.code.CGlobalDataInfo;
import com.oracle.svm.core.graal.code.CGlobalDataReference;
import jdk.vm.ci.code.Register;
import jdk.vm.ci.meta.AllocatableValue;
public final class AArch64CGlobalDataLoadAddressOp extends AArch64LIRInstruction {
public static final LIRInstructionClass<AArch64CGlobalDataLoadAddressOp> TYPE = LIRInstructionClass.create(AArch64CGlobalDataLoadAddressOp.class);
@Def(REG) private AllocatableValue result;
private final CGlobalDataInfo dataInfo;
AArch64CGlobalDataLoadAddressOp(CGlobalDataInfo dataInfo, AllocatableValue result) {
super(TYPE);
this.dataInfo = dataInfo;
this.result = result;
}
@Override
public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
int bits = result.getPlatformKind().getSizeInBytes() * 8;
if (SubstrateUtil.HOSTED) {
// AOT compilation: record patch that is fixed up later
crb.compilationResult.recordDataPatch(masm.position(), new CGlobalDataReference(dataInfo));
Register resultRegister = asRegister(result);
if (dataInfo.isSymbolReference()) {
// Pure symbol reference: the data contains the symbol's address, load it
masm.adrpLdr(64, resultRegister, resultRegister);
} else {
// Data: load its address
masm.adrpAdd(resultRegister);
}
} else {
// Runtime compilation: compute the actual address
Pointer globalsBase = CGlobalDataInfo.CGLOBALDATA_RUNTIME_BASE_ADDRESS.get();
Pointer address = globalsBase.add(dataInfo.getOffset());
masm.mov(asRegister(result), address.rawValue());
if (dataInfo.isSymbolReference()) { // load data, which contains symbol's address
masm.ldr(bits, asRegister(result), AArch64Address.createBaseRegisterOnlyAddress(asRegister(result)));
}
}
}
}