package org.graalvm.compiler.core.aarch64;
import static org.graalvm.compiler.lir.LIRValueUtil.asConstant;
import static org.graalvm.compiler.lir.LIRValueUtil.isConstantValue;
import static org.graalvm.compiler.lir.LIRValueUtil.isStackSlotValue;
import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
import org.graalvm.compiler.core.common.type.DataPointerConstant;
import org.graalvm.compiler.debug.GraalError;
import org.graalvm.compiler.lir.LIRInstruction;
import org.graalvm.compiler.lir.aarch64.AArch64AddressValue;
import org.graalvm.compiler.lir.aarch64.AArch64LIRInstruction;
import org.graalvm.compiler.lir.aarch64.AArch64Move;
import org.graalvm.compiler.lir.aarch64.AArch64Move.LoadAddressOp;
import org.graalvm.compiler.lir.gen.LIRGeneratorTool.MoveFactory;
import jdk.vm.ci.meta.AllocatableValue;
import jdk.vm.ci.meta.Constant;
import jdk.vm.ci.meta.JavaConstant;
import jdk.vm.ci.meta.Value;
public class AArch64MoveFactory implements MoveFactory {
@Override
public LIRInstruction createMove(AllocatableValue dst, Value src) {
boolean srcIsSlot = isStackSlotValue(src);
boolean dstIsSlot = isStackSlotValue(dst);
if (isConstantValue(src)) {
return createLoad(dst, asConstant(src));
} else if (src instanceof AArch64AddressValue) {
return new LoadAddressOp(dst, (AArch64AddressValue) src);
} else {
assert src instanceof AllocatableValue;
if (srcIsSlot && dstIsSlot) {
throw GraalError.shouldNotReachHere(src.getClass() + " " + dst.getClass());
} else {
return new AArch64Move.Move(dst, (AllocatableValue) src);
}
}
}
@Override
public LIRInstruction createStackMove(AllocatableValue result, AllocatableValue input) {
return new AArch64Move.Move(result, input);
}
@Override
public AArch64LIRInstruction createLoad(AllocatableValue dst, Constant src) {
if (src instanceof JavaConstant) {
JavaConstant javaConstant = (JavaConstant) src;
if (canInlineConstant(javaConstant)) {
return new AArch64Move.LoadInlineConstant(javaConstant, dst);
} else {
return new AArch64Move.LoadInlineConstant(javaConstant, dst);
}
} else if (src instanceof DataPointerConstant) {
return new AArch64Move.LoadDataOp(dst, (DataPointerConstant) src);
} else {
throw GraalError.unimplemented();
}
}
@Override
public LIRInstruction createStackLoad(AllocatableValue result, Constant input) {
return createLoad(result, input);
}
@Override
public boolean canInlineConstant(Constant con) {
if (con instanceof JavaConstant) {
JavaConstant c = (JavaConstant) con;
switch (c.getJavaKind()) {
case Boolean:
case Byte:
case Char:
case Short:
case Int:
return AArch64MacroAssembler.isMovableImmediate(c.asInt());
case Long:
return AArch64MacroAssembler.isMovableImmediate(c.asLong());
case Object:
return c.isNull();
default:
return false;
}
}
return false;
}
@Override
public boolean allowConstantToStackMove(Constant value) {
return false;
}
}