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.rop.code.RegisterSpecList; 23579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.util.AnnotatedOutput; 24579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 25579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport java.util.BitSet; 26579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 27579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/** 28579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Instruction format {@code 22t}. See the instruction format spec 29579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * for details. 30579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 31579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpublic final class Form22t extends InsnFormat { 32579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@code non-null;} unique instance of this class */ 33579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final InsnFormat THE_ONE = new Form22t(); 34579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 35579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 36579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Constructs an instance. This class is not publicly 37579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * instantiable. Use {@link #THE_ONE}. 38579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 39579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson private Form22t() { 40579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // This space intentionally left blank. 41579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 42579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 43579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 44579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 45579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public String insnArgString(DalvInsn insn) { 46579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList regs = insn.getRegisters(); 47579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return regs.get(0).regString() + ", " + regs.get(1).regString() + 48579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson ", " + branchString(insn); 49579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 50579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 51579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 52579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 53579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public String insnCommentString(DalvInsn insn, boolean noteIndices) { 54579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return branchComment(insn); 55579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 56579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 57579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 58579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 59579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public int codeSize() { 60579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return 2; 61579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 62579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 63579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 64579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 65579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public boolean isCompatible(DalvInsn insn) { 66579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList regs = insn.getRegisters(); 67579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 68579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson if (!((insn instanceof TargetInsn) && 69579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson (regs.size() == 2) && 70579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson unsignedFitsInNibble(regs.get(0).getReg()) && 71579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson unsignedFitsInNibble(regs.get(1).getReg()))) { 72579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return false; 73579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 74579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 75579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson TargetInsn ti = (TargetInsn) insn; 76579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return ti.hasTargetOffset() ? branchFits(ti) : true; 77579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 78579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 79579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 80579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 81579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public BitSet compatibleRegs(DalvInsn insn) { 82579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList regs = insn.getRegisters(); 83579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson BitSet bits = new BitSet(2); 84579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 85579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson bits.set(0, unsignedFitsInNibble(regs.get(0).getReg())); 86579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson bits.set(1, unsignedFitsInNibble(regs.get(1).getReg())); 87579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return bits; 88579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 89579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 90579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 91579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 92579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public boolean branchFits(TargetInsn insn) { 93579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson int offset = insn.getTargetOffset(); 94579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 95579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // Note: A zero offset would fit, but it is prohibited by the spec. 96579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return (offset != 0) && signedFitsInShort(offset); 97579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 98579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 99579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 100579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 101579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public void writeTo(AnnotatedOutput out, DalvInsn insn) { 102579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList regs = insn.getRegisters(); 103579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson int offset = ((TargetInsn) insn).getTargetOffset(); 104579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 105579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson write(out, 106579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson opcodeUnit(insn, 107579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson makeByte(regs.get(0).getReg(), regs.get(1).getReg())), 108579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson (short) offset); 109579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 110579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson} 111