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.CstInsn; 20579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.dex.code.DalvInsn; 21579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.dex.code.InsnFormat; 22579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.rop.code.RegisterSpecList; 23579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.rop.cst.Constant; 24579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.rop.cst.CstLiteralBits; 25579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.util.AnnotatedOutput; 26579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 27579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport java.util.BitSet; 28579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 29579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/** 30579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Instruction format {@code 22b}. See the instruction format spec 31579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * for details. 32579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 33579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpublic final class Form22b extends InsnFormat { 34579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@code non-null;} unique instance of this class */ 35579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final InsnFormat THE_ONE = new Form22b(); 36579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 37579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 38579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Constructs an instance. This class is not publicly 39579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * instantiable. Use {@link #THE_ONE}. 40579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 41579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson private Form22b() { 42579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // This space intentionally left blank. 43579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 44579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 45579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 46579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 47579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public String insnArgString(DalvInsn insn) { 48579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList regs = insn.getRegisters(); 49579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson CstLiteralBits value = (CstLiteralBits) ((CstInsn) insn).getConstant(); 50579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 51579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return regs.get(0).regString() + ", " + regs.get(1).regString() + 52579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson ", " + literalBitsString(value); 53579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 54579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 55579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 56579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 57579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public String insnCommentString(DalvInsn insn, boolean noteIndices) { 58579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson CstLiteralBits value = (CstLiteralBits) ((CstInsn) insn).getConstant(); 59579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return literalBitsComment(value, 8); 60579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 61579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 62579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 63579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 64579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public int codeSize() { 65579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return 2; 66579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 67579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 68579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 69579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 70579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public boolean isCompatible(DalvInsn insn) { 71579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList regs = insn.getRegisters(); 72579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson if (!((insn instanceof CstInsn) && 73579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson (regs.size() == 2) && 74579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson unsignedFitsInByte(regs.get(0).getReg()) && 75579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson unsignedFitsInByte(regs.get(1).getReg()))) { 76579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return false; 77579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 78579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 79579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson CstInsn ci = (CstInsn) insn; 80579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson Constant cst = ci.getConstant(); 81579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 82579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson if (!(cst instanceof CstLiteralBits)) { 83579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return false; 84579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 85579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 86579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson CstLiteralBits cb = (CstLiteralBits) cst; 87579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 88579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return cb.fitsInInt() && signedFitsInByte(cb.getIntBits()); 89579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 90579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 91579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 92579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 93579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public BitSet compatibleRegs(DalvInsn insn) { 94579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList regs = insn.getRegisters(); 95579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson BitSet bits = new BitSet(2); 96579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 97579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson bits.set(0, unsignedFitsInByte(regs.get(0).getReg())); 98579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson bits.set(1, unsignedFitsInByte(regs.get(1).getReg())); 99579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return bits; 100579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 101579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 102579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 103579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 104579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public void writeTo(AnnotatedOutput out, DalvInsn insn) { 105579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList regs = insn.getRegisters(); 106579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson int value = 107579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson ((CstLiteralBits) ((CstInsn) insn).getConstant()).getIntBits(); 108579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 109579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson write(out, 110579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson opcodeUnit(insn, regs.get(0).getReg()), 111579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson codeUnit(regs.get(1).getReg(), value & 0xff)); 112579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 113579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson} 114