001/*
002 * Copyright (c) 2011, 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 static jdk.internal.jvmci.code.ValueUtil.*;
026import static jdk.internal.jvmci.sparc.SPARC.*;
027import jdk.internal.jvmci.code.*;
028import jdk.internal.jvmci.hotspot.*;
029import jdk.internal.jvmci.meta.*;
030
031import com.oracle.graal.asm.sparc.*;
032import com.oracle.graal.asm.sparc.SPARCMacroAssembler.Setx;
033import com.oracle.graal.lir.*;
034import com.oracle.graal.lir.asm.*;
035import com.oracle.graal.lir.gen.*;
036import com.oracle.graal.lir.sparc.*;
037
038/**
039 * Emits a safepoint poll.
040 */
041@Opcode("SAFEPOINT")
042public class SPARCHotSpotSafepointOp extends SPARCLIRInstruction {
043    public static final LIRInstructionClass<SPARCHotSpotSafepointOp> TYPE = LIRInstructionClass.create(SPARCHotSpotSafepointOp.class);
044    public static final SizeEstimate SIZE = SizeEstimate.create(9);
045
046    @State protected LIRFrameState state;
047    @Use({OperandFlag.REG}) AllocatableValue safepointPollAddress;
048    private final HotSpotVMConfig config;
049
050    public SPARCHotSpotSafepointOp(LIRFrameState state, HotSpotVMConfig config, LIRGeneratorTool tool) {
051        super(TYPE, SIZE);
052        this.state = state;
053        this.config = config;
054        SPARCHotSpotLIRGenerator lirGen = (SPARCHotSpotLIRGenerator) tool;
055        safepointPollAddress = lirGen.getSafepointAddressValue();
056    }
057
058    @Override
059    public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
060        emitCode(crb, masm, config, false, state, asRegister(safepointPollAddress));
061    }
062
063    public static void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm, HotSpotVMConfig config, boolean atReturn, LIRFrameState state, Register safepointPollAddress) {
064        crb.recordMark(atReturn ? config.MARKID_POLL_RETURN_FAR : config.MARKID_POLL_FAR);
065        if (state != null) {
066            final int pos = masm.position();
067            crb.recordInfopoint(pos, state, InfopointReason.SAFEPOINT);
068        }
069        masm.ldx(new SPARCAddress(safepointPollAddress, 0), g0);
070    }
071
072    public static class SPARCLoadSafepointPollAddress extends SPARCLIRInstruction {
073        public static final LIRInstructionClass<SPARCLoadSafepointPollAddress> TYPE = LIRInstructionClass.create(SPARCLoadSafepointPollAddress.class);
074        public static final SizeEstimate SIZE = SizeEstimate.create(2);
075
076        @Def({OperandFlag.REG}) protected AllocatableValue result;
077        private final HotSpotVMConfig config;
078
079        public SPARCLoadSafepointPollAddress(AllocatableValue result, HotSpotVMConfig config) {
080            super(TYPE, SIZE);
081            this.result = result;
082            this.config = config;
083        }
084
085        @Override
086        public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
087            new Setx(config.safepointPollingAddress, ValueUtil.asRegister(result)).emit(masm);
088        }
089    }
090}