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.form; 18f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 19f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport com.android.dx.dex.code.DalvInsn; 20f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport com.android.dx.dex.code.InsnFormat; 21f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport com.android.dx.dex.code.TargetInsn; 22f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport com.android.dx.rop.code.RegisterSpecList; 23f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport com.android.dx.util.AnnotatedOutput; 24dd79e4e11fa20d6677b70ce6618a8653a1f3520djeffhaoimport java.util.BitSet; 25dd79e4e11fa20d6677b70ce6618a8653a1f3520djeffhao 26f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/** 2799409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project * Instruction format {@code 21t}. See the instruction format spec 28f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * for details. 29f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 30f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectpublic final class Form21t extends InsnFormat { 3199409883d9c4c0ffb49b070ce307bb33a9dfe9f1The Android Open Source Project /** {@code non-null;} unique instance of this class */ 32f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public static final InsnFormat THE_ONE = new Form21t(); 33f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 34f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 35f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Constructs an instance. This class is not publicly 36f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * instantiable. Use {@link #THE_ONE}. 37f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 38f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project private Form21t() { 39f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // This space intentionally left blank. 40f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 41f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 42f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 43f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 44f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public String insnArgString(DalvInsn insn) { 45f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project RegisterSpecList regs = insn.getRegisters(); 46f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return regs.get(0).regString() + ", " + branchString(insn); 47f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 48f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 49f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 50f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 51f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public String insnCommentString(DalvInsn insn, boolean noteIndices) { 52f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return branchComment(insn); 53f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 54f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 55f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 56f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 57f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public int codeSize() { 58f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return 2; 59f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 60f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 61f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 62f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 63f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public boolean isCompatible(DalvInsn insn) { 64f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project RegisterSpecList regs = insn.getRegisters(); 65f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 66f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!((insn instanceof TargetInsn) && 67f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project (regs.size() == 1) && 68f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project unsignedFitsInByte(regs.get(0).getReg()))) { 69f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return false; 70f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 71f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 72f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project TargetInsn ti = (TargetInsn) insn; 73f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return ti.hasTargetOffset() ? branchFits(ti) : true; 74f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 75f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 76f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 77f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 78dd79e4e11fa20d6677b70ce6618a8653a1f3520djeffhao public BitSet compatibleRegs(DalvInsn insn) { 79dd79e4e11fa20d6677b70ce6618a8653a1f3520djeffhao RegisterSpecList regs = insn.getRegisters(); 80dd79e4e11fa20d6677b70ce6618a8653a1f3520djeffhao BitSet bits = new BitSet(1); 81dd79e4e11fa20d6677b70ce6618a8653a1f3520djeffhao 82dd79e4e11fa20d6677b70ce6618a8653a1f3520djeffhao bits.set(0, unsignedFitsInByte(regs.get(0).getReg())); 83dd79e4e11fa20d6677b70ce6618a8653a1f3520djeffhao return bits; 84dd79e4e11fa20d6677b70ce6618a8653a1f3520djeffhao } 85dd79e4e11fa20d6677b70ce6618a8653a1f3520djeffhao 86dd79e4e11fa20d6677b70ce6618a8653a1f3520djeffhao /** {@inheritDoc} */ 87dd79e4e11fa20d6677b70ce6618a8653a1f3520djeffhao @Override 88f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public boolean branchFits(TargetInsn insn) { 89f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int offset = insn.getTargetOffset(); 90f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 91f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // Note: A zero offset would fit, but it is prohibited by the spec. 92f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return (offset != 0) && signedFitsInShort(offset); 93f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 94f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 95f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** {@inheritDoc} */ 96f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project @Override 97f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public void writeTo(AnnotatedOutput out, DalvInsn insn) { 98f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project RegisterSpecList regs = insn.getRegisters(); 99f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int offset = ((TargetInsn) insn).getTargetOffset(); 100f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 101f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project write(out, 102f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project opcodeUnit(insn, regs.get(0).getReg()), 103f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project (short) offset); 104f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 105f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 106