1579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/* 2579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Copyright (C) 2007 The Android Open Source Project 3579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 4579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Licensed under the Apache License, Version 2.0 (the "License"); 5579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * you may not use this file except in compliance with the License. 6579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * You may obtain a copy of the License at 7579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 8579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 9579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 10579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Unless required by applicable law or agreed to in writing, software 11579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 12579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * See the License for the specific language governing permissions and 14579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * limitations under the License. 15579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 16579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 17579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpackage com.android.dx.dex.code; 18579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 19579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.rop.code.RegisterSpecList; 20579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.rop.code.SourcePosition; 21579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.util.AnnotatedOutput; 22579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 23579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/** 24579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Pseudo-instruction base class for zero-size (no code emitted) 25579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * instructions, which are generally used for tracking metainformation 26579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * about the code they are adjacent to. 27579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 28579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpublic abstract class ZeroSizeInsn extends DalvInsn { 29579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 30579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Constructs an instance. The output address of this instance is initially 31579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * unknown ({@code -1}). 32579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 33579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * @param position {@code non-null;} source position 34579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 35579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public ZeroSizeInsn(SourcePosition position) { 36579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson super(Dops.SPECIAL_FORMAT, position, RegisterSpecList.EMPTY); 37579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 38579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 39579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 40579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 41579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public final int codeSize() { 42579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return 0; 43579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 44579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 45579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 46579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 47579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public final void writeTo(AnnotatedOutput out) { 48579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // Nothing to do here, for this class. 49579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 50579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 51579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 52579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 53579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public final DalvInsn withOpcode(Dop opcode) { 54579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson throw new RuntimeException("unsupported"); 55579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 56579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 57579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 58579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 59579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public DalvInsn withRegisterOffset(int delta) { 60579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return withRegisters(getRegisters().withOffset(delta)); 61579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 62579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson} 63