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 * Copyright (c) 2018, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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 com.oracle.svm.core.graal.aarch64;

import static jdk.vm.ci.code.ValueUtil.asRegister;
import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.ILLEGAL;
import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;

import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
import org.graalvm.compiler.lir.LIRInstructionClass;
import org.graalvm.compiler.lir.Opcode;
import org.graalvm.compiler.lir.aarch64.AArch64BlockEndOp;
import org.graalvm.compiler.lir.asm.CompilationResultBuilder;

import jdk.vm.ci.aarch64.AArch64;
import jdk.vm.ci.meta.AllocatableValue;

@Opcode("FAR_RETURN")
public final class AArch64FarReturnOp extends AArch64BlockEndOp {
    public static final LIRInstructionClass<AArch64FarReturnOp> TYPE = LIRInstructionClass.create(AArch64FarReturnOp.class);

    @Use({REG, ILLEGAL}) AllocatableValue result;
    @Use(REG) AllocatableValue sp;
    @Use(REG) AllocatableValue ip;

    public AArch64FarReturnOp(AllocatableValue result, AllocatableValue sp, AllocatableValue ip) {
        super(TYPE);
        this.result = result;
        this.sp = sp;
        this.ip = ip;
    }

    @Override
    public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
        masm.mov(sp.getPlatformKind().getSizeInBytes() * 8, AArch64.sp, asRegister(sp));
        masm.ret(asRegister(ip));
    }
}