1 /* 2 * Copyright (c) 2009, 2019, 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.lir.gen; 26 27 import org.graalvm.compiler.core.common.LIRKind; 28 import org.graalvm.compiler.lir.Variable; 29 import org.graalvm.compiler.options.OptionValues; 30 31 import jdk.vm.ci.meta.AllocatableValue; 32 import jdk.vm.ci.meta.PlatformKind; 33 import jdk.vm.ci.meta.Value; 34 35 /** 36 * This class traverses the HIR instructions and generates LIR instructions from them. 37 */ 38 public abstract class ArithmeticLIRGenerator implements ArithmeticLIRGeneratorTool { 39 40 LIRGenerator lirGen; 41 42 public LIRGenerator getLIRGen() { 43 return lirGen; 44 } 45 46 protected final AllocatableValue asAllocatable(Value value) { 47 return lirGen.asAllocatable(value); 48 } 49 50 public OptionValues getOptions() { 51 return getLIRGen().getResult().getLIR().getOptions(); 52 } 53 // automatic derived reference handling 54 55 protected abstract boolean isNumericInteger(PlatformKind kind); 56 57 protected abstract Variable emitAdd(LIRKind resultKind, Value a, Value b, boolean setFlags); 58 59 protected abstract Variable emitSub(LIRKind resultKind, Value a, Value b, boolean setFlags); 60 61 @Override 62 public final Variable emitAdd(Value aVal, Value bVal, boolean setFlags) { 63 return emitAddOrSub(aVal, bVal, setFlags, true); 64 } 65 66 @Override 67 public final Variable emitSub(Value aVal, Value bVal, boolean setFlags) { 68 return emitAddOrSub(aVal, bVal, setFlags, false); 69 } 70 71 private Variable emitAddOrSub(Value aVal, Value bVal, boolean setFlags, boolean isAdd) { 72 LIRKind resultKind; 73 Value a = aVal; 74 Value b = bVal; 75 76 if (isNumericInteger(a.getPlatformKind())) { 77 LIRKind aKind = a.getValueKind(LIRKind.class); 78 LIRKind bKind = b.getValueKind(LIRKind.class); 79 assert a.getPlatformKind() == b.getPlatformKind() : a.getPlatformKind() + " vs. " + b.getPlatformKind(); 80 81 if (aKind.isUnknownReference()) { 82 resultKind = aKind; 83 } else if (bKind.isUnknownReference()) { 84 resultKind = bKind; 85 } else if (aKind.isValue() && bKind.isValue()) { 86 resultKind = aKind; 87 } else if (aKind.isValue()) { 88 if (bKind.isDerivedReference()) { 89 resultKind = bKind; 90 } else { 91 AllocatableValue allocatable = asAllocatable(b); 92 resultKind = bKind.makeDerivedReference(allocatable); 93 b = allocatable; 94 } 95 } else if (bKind.isValue()) { 96 if (aKind.isDerivedReference()) { 97 resultKind = aKind; 98 } else { 99 AllocatableValue allocatable = asAllocatable(a); 100 resultKind = aKind.makeDerivedReference(allocatable); 101 a = allocatable; 102 } 103 } else { 104 resultKind = aKind.makeUnknownReference(); 105 } 106 } else { 107 resultKind = LIRKind.combine(a, b); 108 } 109 110 return isAdd ? emitAdd(resultKind, a, b, setFlags) : emitSub(resultKind, a, b, setFlags); 111 } 112 113 public Value emitRor(Value value, Value distance) { 114 // (value >>> distance) | (value << -distance) 115 return emitOr(emitUShr(value, distance), emitShl(value, emitNegate(distance))); 116 } 117 118 }