/*
* Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* 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.lir.aarch64;
import static jdk.vm.ci.code.ValueUtil.asRegister;
import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.COMPOSITE;
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.LIRFrameState;
import org.graalvm.compiler.lir.LIRInstructionClass;
import org.graalvm.compiler.lir.StandardOp.ImplicitNullCheck;
import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
import jdk.vm.ci.code.Register;
import jdk.vm.ci.meta.AllocatableValue;
import jdk.vm.ci.meta.Value;
/**
* AARCH64 LIR instructions that have one input and one output.
*/
public class AArch64Unary {
/**
* Instruction with a {@link AArch64AddressValue memory} operand.
*/
public static class MemoryOp extends AArch64LIRInstruction implements ImplicitNullCheck {
public static final LIRInstructionClass<MemoryOp> TYPE = LIRInstructionClass.create(MemoryOp.class);
private final boolean isSigned;
@Def({REG}) protected AllocatableValue result;
@Use({COMPOSITE}) protected AArch64AddressValue input;
@State protected LIRFrameState state;
private int targetSize;
private int srcSize;
public MemoryOp(boolean isSigned, int targetSize, int srcSize, AllocatableValue result, AArch64AddressValue input, LIRFrameState state) {
super(TYPE);
this.targetSize = targetSize;
this.srcSize = srcSize;
this.isSigned = isSigned;
this.result = result;
this.input = input;
this.state = state;
}
@Override
public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
if (state != null) {
crb.recordImplicitException(masm.position(), state);
}
AArch64Address address = input.toAddress();
Register dst = asRegister(result);
if (isSigned) {
masm.ldrs(targetSize, srcSize, dst, address);
} else {
masm.ldr(srcSize, dst, address);
}
}
@Override
public boolean makeNullCheckFor(Value value, LIRFrameState nullCheckState, int implicitNullCheckLimit) {
int immediate = input.getImmediate();
if (state == null && value.equals(input.getBase()) && input.getOffset().equals(Value.ILLEGAL) && immediate >= 0 && immediate < implicitNullCheckLimit) {
state = nullCheckState;
return true;
}
return false;
}
}
}