001/*
002 * Copyright (c) 2015, 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.*;
029
030import com.oracle.graal.asm.sparc.*;
031import com.oracle.graal.lir.*;
032import com.oracle.graal.lir.asm.*;
033import com.oracle.graal.lir.sparc.*;
034
035/**
036 * Jumps to the exception handler specified by {@link #address} and leaves the current window. It
037 * does not modify the i7 register, as the exception handler stub expects the throwing pc in it.
038 * <p>
039 * See also:
040 * <li>Runtime1::generate_handle_exception c1_Runtime1_sparc.cpp
041 * <li>SharedRuntime::generate_deopt_blob at exception_in_tls_offset (sharedRuntime_sparc.cpp)
042 */
043@Opcode("JUMP_TO_EXCEPTION_HANDLER")
044final class SPARCHotSpotJumpToExceptionHandlerOp extends SPARCLIRInstruction {
045    public static final LIRInstructionClass<SPARCHotSpotJumpToExceptionHandlerOp> TYPE = LIRInstructionClass.create(SPARCHotSpotJumpToExceptionHandlerOp.class);
046    public static final SizeEstimate SIZE = SizeEstimate.create(2);
047
048    @Use(REG) AllocatableValue address;
049
050    SPARCHotSpotJumpToExceptionHandlerOp(AllocatableValue address) {
051        super(TYPE, SIZE);
052        this.address = address;
053    }
054
055    @Override
056    public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
057        Register addrRegister = asLongReg(address);
058        masm.jmp(addrRegister);
059        masm.restoreWindow();
060    }
061}