1 /*
   2  * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.hotspot.sparc;
  24 
  25 import static jdk.vm.ci.code.ValueUtil.asRegister;
  26 import static jdk.vm.ci.sparc.SPARC.g0;
  27 
  28 import org.graalvm.compiler.asm.sparc.SPARCAddress;
  29 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler;
  30 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
  31 import org.graalvm.compiler.lir.LIRFrameState;
  32 import org.graalvm.compiler.lir.LIRInstructionClass;
  33 import org.graalvm.compiler.lir.Opcode;
  34 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  35 import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
  36 import org.graalvm.compiler.lir.sparc.SPARCLIRInstruction;
  37 
  38 import jdk.vm.ci.code.Register;
  39 import jdk.vm.ci.code.ValueUtil;
  40 import jdk.vm.ci.code.site.InfopointReason;
  41 import jdk.vm.ci.meta.AllocatableValue;
  42 
  43 /**
  44  * Emits a safepoint poll.
  45  */
  46 @Opcode("SAFEPOINT")
  47 public class SPARCHotSpotSafepointOp extends SPARCLIRInstruction {
  48     public static final LIRInstructionClass<SPARCHotSpotSafepointOp> TYPE = LIRInstructionClass.create(SPARCHotSpotSafepointOp.class);
  49     public static final SizeEstimate SIZE = SizeEstimate.create(9);
  50 
  51     @State protected LIRFrameState state;
  52     @Use({OperandFlag.REG}) AllocatableValue safepointPollAddress;
  53     private final GraalHotSpotVMConfig config;
  54 
  55     public SPARCHotSpotSafepointOp(LIRFrameState state, GraalHotSpotVMConfig config, LIRGeneratorTool tool) {
  56         super(TYPE, SIZE);
  57         this.state = state;
  58         this.config = config;
  59         SPARCHotSpotLIRGenerator lirGen = (SPARCHotSpotLIRGenerator) tool;
  60         safepointPollAddress = lirGen.getSafepointAddressValue();
  61     }
  62 
  63     @Override
  64     public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
  65         emitCode(crb, masm, config, false, state, asRegister(safepointPollAddress));
  66     }
  67 
  68     public static void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm, GraalHotSpotVMConfig config, boolean atReturn, LIRFrameState state, Register safepointPollAddress) {
  69         crb.recordMark(atReturn ? config.MARKID_POLL_RETURN_FAR : config.MARKID_POLL_FAR);
  70         if (state != null) {
  71             final int pos = masm.position();
  72             crb.recordInfopoint(pos, state, InfopointReason.SAFEPOINT);
  73         }
  74         masm.ldx(new SPARCAddress(safepointPollAddress, 0), g0);
  75     }
  76 
  77     public static class SPARCLoadSafepointPollAddress extends SPARCLIRInstruction {
  78         public static final LIRInstructionClass<SPARCLoadSafepointPollAddress> TYPE = LIRInstructionClass.create(SPARCLoadSafepointPollAddress.class);
  79         public static final SizeEstimate SIZE = SizeEstimate.create(2);
  80 
  81         @Def({OperandFlag.REG}) protected AllocatableValue result;
  82         private final GraalHotSpotVMConfig config;
  83 
  84         public SPARCLoadSafepointPollAddress(AllocatableValue result, GraalHotSpotVMConfig config) {
  85             super(TYPE, SIZE);
  86             this.result = result;
  87             this.config = config;
  88         }
  89 
  90         @Override
  91         public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
  92             masm.setx(config.safepointPollingAddress, ValueUtil.asRegister(result), false);
  93         }
  94     }
  95 }