001/*
002 * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.hotspot.sparc;
024
025import jdk.internal.jvmci.code.*;
026import jdk.internal.jvmci.meta.*;
027import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*;
028import static jdk.internal.jvmci.code.ValueUtil.*;
029import static jdk.internal.jvmci.sparc.SPARC.*;
030
031import com.oracle.graal.asm.sparc.*;
032import com.oracle.graal.lir.*;
033import com.oracle.graal.lir.asm.*;
034import com.oracle.graal.lir.sparc.*;
035
036/**
037 * Patch the return address of the current frame.
038 */
039@Opcode("PATCH_RETURN")
040final class SPARCHotSpotPatchReturnAddressOp extends SPARCLIRInstruction {
041    public static final LIRInstructionClass<SPARCHotSpotPatchReturnAddressOp> TYPE = LIRInstructionClass.create(SPARCHotSpotPatchReturnAddressOp.class);
042    public static final SizeEstimate SIZE = SizeEstimate.create(1);
043
044    @Use(REG) AllocatableValue address;
045
046    SPARCHotSpotPatchReturnAddressOp(AllocatableValue address) {
047        super(TYPE, SIZE);
048        this.address = address;
049    }
050
051    @Override
052    public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
053        Register addrRegister = asLongReg(address);
054        masm.sub(addrRegister, SPARCAssembler.PC_RETURN_OFFSET, i7);
055    }
056}