1f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 2f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 3f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 4f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 5f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * you may not use this file except in compliance with the License. 6f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * You may obtain a copy of the License at 7f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 8f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 9f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 10f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 11f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 12f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * See the License for the specific language governing permissions and 14f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * limitations under the License. 15f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 16f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 17f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectpackage com.android.dx.rop.code; 18f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 19fe107fb6e3f308ac5174ebdc5a794ee880c741d9Jesse Wilsonimport com.android.dx.rop.cst.Constant; 20fe107fb6e3f308ac5174ebdc5a794ee880c741d9Jesse Wilsonimport com.android.dx.rop.cst.CstInteger; 21f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport com.android.dx.rop.type.StdTypeList; 22f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport com.android.dx.rop.type.Type; 23f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport com.android.dx.rop.type.TypeBearer; 24fe107fb6e3f308ac5174ebdc5a794ee880c741d9Jesse Wilsonimport com.android.dx.rop.type.TypeList; 25f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 26f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/** 27f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Plain instruction, which has no embedded data and which cannot possibly 28f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * throw an exception. 29f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 30f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectpublic final class PlainInsn 31f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project extends Insn { 32f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 33f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Constructs an instance. 34de75089fb7216d19e9c22cce4dc62a49513477d3Carl Shapiro * 3599409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @param opcode {@code non-null;} the opcode 3699409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @param position {@code non-null;} source position 3799409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @param result {@code null-ok;} spec for the result, if any 3899409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @param sources {@code non-null;} specs for all the sources 39f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 40f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public PlainInsn(Rop opcode, SourcePosition position, 41f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project RegisterSpec result, RegisterSpecList sources) { 42f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project super(opcode, position, result, sources); 43f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 44f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project switch (opcode.getBranchingness()) { 45f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project case Rop.BRANCH_SWITCH: 46f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project case Rop.BRANCH_THROW: { 47cdef1ee858fde291205f3da685b2720227d2d42fOrion Hodson throw new IllegalArgumentException("opcode with invalid branchingness: " + opcode.getBranchingness()); 48f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 49f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 50f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 51f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (result != null && opcode.getBranchingness() != Rop.BRANCH_NONE) { 52f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // move-result-pseudo is required here 53f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new IllegalArgumentException 54de75089fb7216d19e9c22cce4dc62a49513477d3Carl Shapiro ("can't mix branchingness with result"); 55f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 56f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 57f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 58f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 59f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Constructs a single-source instance. 60de75089fb7216d19e9c22cce4dc62a49513477d3Carl Shapiro * 6199409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @param opcode {@code non-null;} the opcode 6299409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @param position {@code non-null;} source position 6399409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @param result {@code null-ok;} spec for the result, if any 6499409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * @param source {@code non-null;} spec for the source 65f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 66f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public PlainInsn(Rop opcode, SourcePosition position, RegisterSpec result, 67f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project RegisterSpec source) { 68f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project this(opcode, position, result, RegisterSpecList.make(source)); 69f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 70f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 71f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 72f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 73f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public TypeList getCatches() { 74f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return StdTypeList.EMPTY; 75f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 76f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 77f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 78f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 79f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public void accept(Visitor visitor) { 80f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project visitor.visitPlainInsn(this); 81f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 82f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 83f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 84f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 85f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public Insn withAddedCatch(Type type) { 86f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new UnsupportedOperationException("unsupported"); 87f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 88f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 89f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 90f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 91f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public Insn withRegisterOffset(int delta) { 92f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return new PlainInsn(getOpcode(), getPosition(), 93f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project getResult().withOffset(delta), 94f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project getSources().withOffset(delta)); 95f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 96f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 97f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 98f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 991800713d172abd729e4eea04b1bf2110d4e5fd1ajeffhao public Insn withSourceLiteral() { 100f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project RegisterSpecList sources = getSources(); 101f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int szSources = sources.size(); 102f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 103f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (szSources == 0) { 104f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return this; 105f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 106f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 107f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project TypeBearer lastType = sources.get(szSources - 1).getTypeBearer(); 108f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 109f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!lastType.isConstant()) { 110224fa21f414340325cb5e33897177aef9eb5069fjeffhao // Check for reverse subtraction, where first source is constant 111224fa21f414340325cb5e33897177aef9eb5069fjeffhao TypeBearer firstType = sources.get(0).getTypeBearer(); 112224fa21f414340325cb5e33897177aef9eb5069fjeffhao if (szSources == 2 && firstType.isConstant()) { 113224fa21f414340325cb5e33897177aef9eb5069fjeffhao Constant cst = (Constant) firstType; 114224fa21f414340325cb5e33897177aef9eb5069fjeffhao RegisterSpecList newSources = sources.withoutFirst(); 115224fa21f414340325cb5e33897177aef9eb5069fjeffhao Rop newRop = Rops.ropFor(getOpcode().getOpcode(), getResult(), 116224fa21f414340325cb5e33897177aef9eb5069fjeffhao newSources, cst); 117224fa21f414340325cb5e33897177aef9eb5069fjeffhao return new PlainCstInsn(newRop, getPosition(), getResult(), 118224fa21f414340325cb5e33897177aef9eb5069fjeffhao newSources, cst); 1191800713d172abd729e4eea04b1bf2110d4e5fd1ajeffhao } 120f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return this; 121224fa21f414340325cb5e33897177aef9eb5069fjeffhao } else { 122224fa21f414340325cb5e33897177aef9eb5069fjeffhao 123224fa21f414340325cb5e33897177aef9eb5069fjeffhao Constant cst = (Constant) lastType; 124224fa21f414340325cb5e33897177aef9eb5069fjeffhao 125224fa21f414340325cb5e33897177aef9eb5069fjeffhao RegisterSpecList newSources = sources.withoutLast(); 126224fa21f414340325cb5e33897177aef9eb5069fjeffhao 127224fa21f414340325cb5e33897177aef9eb5069fjeffhao Rop newRop; 128224fa21f414340325cb5e33897177aef9eb5069fjeffhao try { 129224fa21f414340325cb5e33897177aef9eb5069fjeffhao // Check for constant subtraction and flip it to be addition 130224fa21f414340325cb5e33897177aef9eb5069fjeffhao int opcode = getOpcode().getOpcode(); 131224fa21f414340325cb5e33897177aef9eb5069fjeffhao if (opcode == RegOps.SUB && cst instanceof CstInteger) { 132224fa21f414340325cb5e33897177aef9eb5069fjeffhao opcode = RegOps.ADD; 133224fa21f414340325cb5e33897177aef9eb5069fjeffhao cst = CstInteger.make(-((CstInteger)cst).getValue()); 134224fa21f414340325cb5e33897177aef9eb5069fjeffhao } 135224fa21f414340325cb5e33897177aef9eb5069fjeffhao newRop = Rops.ropFor(opcode, getResult(), newSources, cst); 136224fa21f414340325cb5e33897177aef9eb5069fjeffhao } catch (IllegalArgumentException ex) { 137224fa21f414340325cb5e33897177aef9eb5069fjeffhao // There's no rop for this case 138224fa21f414340325cb5e33897177aef9eb5069fjeffhao return this; 139224fa21f414340325cb5e33897177aef9eb5069fjeffhao } 140f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 141224fa21f414340325cb5e33897177aef9eb5069fjeffhao return new PlainCstInsn(newRop, getPosition(), 142224fa21f414340325cb5e33897177aef9eb5069fjeffhao getResult(), newSources, cst); 143224fa21f414340325cb5e33897177aef9eb5069fjeffhao } 144f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 145f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 146f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 147f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 148f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 149f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public Insn withNewRegisters(RegisterSpec result, 150f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project RegisterSpecList sources) { 151f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 152f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return new PlainInsn(getOpcode(), getPosition(), 153f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project result, 154f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project sources); 155f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 156f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 157f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 158