1 /* 2 * Copyright (c) 2015, 2015, 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.amd64; 24 25 import org.graalvm.compiler.asm.amd64.AMD64Address; 26 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; 27 import org.graalvm.compiler.lir.LIRInstructionClass; 28 import org.graalvm.compiler.lir.LabelRef; 29 import org.graalvm.compiler.lir.SwitchStrategy; 30 import org.graalvm.compiler.lir.amd64.AMD64ControlFlow; 31 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 32 33 import jdk.vm.ci.code.Register; 34 import jdk.vm.ci.code.ValueUtil; 35 import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant; 36 import jdk.vm.ci.meta.Constant; 37 import jdk.vm.ci.meta.Value; 38 39 final class AMD64HotSpotStrategySwitchOp extends AMD64ControlFlow.StrategySwitchOp { 40 public static final LIRInstructionClass<AMD64HotSpotStrategySwitchOp> TYPE = LIRInstructionClass.create(AMD64HotSpotStrategySwitchOp.class); 41 42 AMD64HotSpotStrategySwitchOp(SwitchStrategy strategy, LabelRef[] keyTargets, LabelRef defaultTarget, Value key, Value scratch) { 43 super(TYPE, strategy, keyTargets, defaultTarget, key, scratch); 44 } 45 46 @Override 47 public void emitCode(final CompilationResultBuilder crb, final AMD64MacroAssembler masm) { 48 strategy.run(new HotSpotSwitchClosure(ValueUtil.asRegister(key), crb, masm)); 49 } 50 51 public class HotSpotSwitchClosure extends SwitchClosure { 52 53 protected HotSpotSwitchClosure(Register keyRegister, CompilationResultBuilder crb, AMD64MacroAssembler masm) { 54 super(keyRegister, crb, masm); 55 } 56 57 @Override 58 protected void emitComparison(Constant c) { 59 if (c instanceof HotSpotMetaspaceConstant) { 60 HotSpotMetaspaceConstant meta = (HotSpotMetaspaceConstant) c; 61 if (meta.isCompressed()) { 62 crb.recordInlineDataInCode(meta); 63 masm.cmpl(keyRegister, 0xDEADDEAD); 64 } else { 65 AMD64Address addr = (AMD64Address) crb.recordDataReferenceInCode(meta, 8); 66 masm.cmpq(keyRegister, addr); 67 } 68 } else { 69 super.emitComparison(c); 70 } 71 } 72 } 73 }