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.asm.sparc.SPARCAssembler.*;
033import com.oracle.graal.asm.sparc.SPARCMacroAssembler.*;
034import com.oracle.graal.lir.*;
035import com.oracle.graal.lir.asm.*;
036
037/**
038 * Sets up the arguments for an exception handler in the callers frame, removes the current frame
039 * and jumps to the handler.
040 */
041@Opcode("JUMP_TO_EXCEPTION_HANDLER_IN_CALLER")
042final class SPARCHotSpotJumpToExceptionHandlerInCallerOp extends SPARCHotSpotEpilogueOp {
043
044    public static final LIRInstructionClass<SPARCHotSpotJumpToExceptionHandlerInCallerOp> TYPE = LIRInstructionClass.create(SPARCHotSpotJumpToExceptionHandlerInCallerOp.class);
045    public static final SizeEstimate SIZE = SizeEstimate.create(5);
046
047    @Use(REG) AllocatableValue handlerInCallerPc;
048    @Use(REG) AllocatableValue exception;
049    @Use(REG) AllocatableValue exceptionPc;
050    private final Register thread;
051    private final int isMethodHandleReturnOffset;
052
053    SPARCHotSpotJumpToExceptionHandlerInCallerOp(AllocatableValue handlerInCallerPc, AllocatableValue exception, AllocatableValue exceptionPc, int isMethodHandleReturnOffset, Register thread) {
054        super(TYPE, SIZE);
055        this.handlerInCallerPc = handlerInCallerPc;
056        this.exception = exception;
057        this.exceptionPc = exceptionPc;
058        this.isMethodHandleReturnOffset = isMethodHandleReturnOffset;
059        this.thread = thread;
060    }
061
062    @Override
063    public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
064        // Move the values up one level to be the input for the next call.
065        masm.mov(asRegister(handlerInCallerPc), i2);
066        masm.mov(asRegister(exception), i0);
067        masm.mov(asRegister(exceptionPc), i1);
068        leaveFrame(crb);
069
070        // Restore SP from L7 if the exception PC is a method handle call site.
071        SPARCAddress dst = new SPARCAddress(thread, isMethodHandleReturnOffset);
072        try (ScratchRegister scratch = masm.getScratchRegister()) {
073            Register scratchReg = scratch.getRegister();
074            masm.lduw(dst, scratchReg);
075            masm.cmp(scratchReg, scratchReg);
076            masm.movcc(ConditionFlag.NotZero, CC.Icc, l7, sp);
077        }
078
079        masm.jmpl(asRegister(handlerInCallerPc), 0, g0);
080        masm.nop();
081    }
082}