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.dex.code; 18f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 19f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport com.android.dx.rop.code.RegisterSpecList; 20f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport com.android.dx.rop.code.SourcePosition; 21f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport com.android.dx.util.AnnotatedOutput; 22f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 23f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/** 24f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Pseudo-instruction which either turns into a <code>nop</code> or 25f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * nothingness, in order to make the subsequent instruction have an 26f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * even address. This is used to align (subsequent) instructions that 27f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * require it. 28f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 29f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectpublic final class OddSpacer extends VariableSizeInsn { 30f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 31f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Constructs an instance. The output address of this instance is initially 32f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * unknown (<code>-1</code>). 33f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 34f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @param position non-null; source position 35f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 36f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public OddSpacer(SourcePosition position) { 37f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project super(position, RegisterSpecList.EMPTY); 38f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 39f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 40f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 41f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 42f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public int codeSize() { 43f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return (getAddress() & 1); 44f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 45f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 46f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 47f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 48f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public void writeTo(AnnotatedOutput out) { 49f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (codeSize() != 0) { 50f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project out.writeShort(InsnFormat.codeUnit(DalvOps.NOP, 0)); 51f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 52f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 53f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 54f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 55f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 56f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public DalvInsn withRegisters(RegisterSpecList registers) { 57f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return new OddSpacer(getPosition()); 58f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 59f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 60f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 61f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 62f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project protected String argString() { 63f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return null; 64f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 65f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 66f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 67f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 68f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project protected String listingString0(boolean noteIndices) { 69f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (codeSize() == 0) { 70f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return null; 71f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 72f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 73f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return "nop // spacer"; 74f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 75f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 76