1 /*
   2  * Copyright (c) 2016, 2018, 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 
  24 
  25 package org.graalvm.compiler.hotspot.aarch64;
  26 
  27 import static jdk.vm.ci.code.ValueUtil.asRegister;
  28 
  29 import java.util.function.Function;
  30 
  31 import org.graalvm.compiler.asm.aarch64.AArch64Assembler;
  32 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
  33 import org.graalvm.compiler.core.common.calc.Condition;
  34 import org.graalvm.compiler.debug.GraalError;
  35 import org.graalvm.compiler.lir.LIRInstructionClass;
  36 import org.graalvm.compiler.lir.LabelRef;
  37 import org.graalvm.compiler.lir.SwitchStrategy;
  38 import org.graalvm.compiler.lir.aarch64.AArch64ControlFlow;
  39 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  40 
  41 import jdk.vm.ci.code.Register;
  42 import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant;
  43 import jdk.vm.ci.meta.Constant;
  44 import jdk.vm.ci.meta.Value;
  45 
  46 final class AArch64HotSpotStrategySwitchOp extends AArch64ControlFlow.StrategySwitchOp {
  47     public static final LIRInstructionClass<AArch64HotSpotStrategySwitchOp> TYPE = LIRInstructionClass.create(AArch64HotSpotStrategySwitchOp.class);
  48 
  49     AArch64HotSpotStrategySwitchOp(SwitchStrategy strategy, LabelRef[] keyTargets, LabelRef defaultTarget, Value key, Value scratch, Function<Condition, AArch64Assembler.ConditionFlag> converter) {
  50         super(TYPE, strategy, keyTargets, defaultTarget, key, scratch, converter);
  51     }
  52 
  53     @Override
  54     public void emitCode(final CompilationResultBuilder crb, final AArch64MacroAssembler masm) {
  55         strategy.run(new HotSpotSwitchClosure(asRegister(key), crb, masm));
  56     }
  57 
  58     public class HotSpotSwitchClosure extends SwitchClosure {
  59 
  60         protected HotSpotSwitchClosure(Register keyRegister, CompilationResultBuilder crb, AArch64MacroAssembler masm) {
  61             super(keyRegister, crb, masm);
  62         }
  63 
  64         @Override
  65         protected void emitComparison(Constant c) {
  66             if (c instanceof HotSpotMetaspaceConstant) {
  67                 HotSpotMetaspaceConstant meta = (HotSpotMetaspaceConstant) c;
  68                 if (meta.isCompressed()) {
  69                     crb.recordInlineDataInCode(meta);
  70                     // masm.cmpl(keyRegister, 0xDEADDEAD);
  71                     throw GraalError.unimplemented();
  72                 } else {
  73                     crb.recordInlineDataInCode(meta);
  74                     masm.movNativeAddress(asRegister(scratch), 0x0000_DEAD_DEAD_DEADL);
  75                     masm.cmp(64, keyRegister, asRegister(scratch));
  76                 }
  77             } else {
  78                 super.emitComparison(c);
  79             }
  80         }
  81     }
  82 }