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.form; 18579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 19579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.dex.code.DalvInsn; 20579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.dex.code.InsnFormat; 21579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.dex.code.TargetInsn; 22579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.util.AnnotatedOutput; 23579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 24579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/** 25579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Instruction format {@code 10t}. See the instruction format spec 26579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * for details. 27579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 28579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpublic final class Form10t extends InsnFormat { 29579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@code non-null;} unique instance of this class */ 30579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final InsnFormat THE_ONE = new Form10t(); 31579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 32579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 33579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Constructs an instance. This class is not publicly 34579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * instantiable. Use {@link #THE_ONE}. 35579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 36579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson private Form10t() { 37579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // This space intentionally left blank. 38579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 39579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 40579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 41579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 42579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public String insnArgString(DalvInsn insn) { 43579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return branchString(insn); 44579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 45579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 46579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 47579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 48579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public String insnCommentString(DalvInsn insn, boolean noteIndices) { 49579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return branchComment(insn); 50579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 51579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 52579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 53579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 54579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public int codeSize() { 55579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return 1; 56579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 57579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 58579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 59579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 60579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public boolean isCompatible(DalvInsn insn) { 61579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson if (!((insn instanceof TargetInsn) && 62579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson (insn.getRegisters().size() == 0))) { 63579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return false; 64579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 65579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 66579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson TargetInsn ti = (TargetInsn) insn; 67579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return ti.hasTargetOffset() ? branchFits(ti) : true; 68579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 69579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 70579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 71579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 72579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public boolean branchFits(TargetInsn insn) { 73579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson int offset = insn.getTargetOffset(); 74579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 75579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // Note: A zero offset would fit, but it is prohibited by the spec. 76579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return (offset != 0) && signedFitsInByte(offset); 77579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 78579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 79579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 80579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 81579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public void writeTo(AnnotatedOutput out, DalvInsn insn) { 82579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson int offset = ((TargetInsn) insn).getTargetOffset(); 83579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 84579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson write(out, opcodeUnit(insn, (offset & 0xff))); 85579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 86579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson} 87