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.SimpleInsn; 22579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.rop.code.RegisterSpec; 23579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.rop.code.RegisterSpecList; 24579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport com.android.dx.util.AnnotatedOutput; 25579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 26579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonimport java.util.BitSet; 27579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 28579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/** 29579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Instruction format {@code 12x}. See the instruction format spec 30579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * for details. 31579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 32579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpublic final class Form12x extends InsnFormat { 33579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@code non-null;} unique instance of this class */ 34579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final InsnFormat THE_ONE = new Form12x(); 35579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 36579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 37579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Constructs an instance. This class is not publicly 38579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * instantiable. Use {@link #THE_ONE}. 39579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 40579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson private Form12x() { 41579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // This space intentionally left blank. 42579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 43579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 44579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 45579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 46579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public String insnArgString(DalvInsn insn) { 47579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList regs = insn.getRegisters(); 48579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson int sz = regs.size(); 49579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 50579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /* 51579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * The (sz - 2) and (sz - 1) below makes this code work for 52579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * both the two- and three-register ops. (See "case 3" in 53579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * isCompatible(), below.) 54579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 55579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 56579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return regs.get(sz - 2).regString() + ", " + 57579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson regs.get(sz - 1).regString(); 58579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 59579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 60579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 61579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 62579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public String insnCommentString(DalvInsn insn, boolean noteIndices) { 63579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // This format has no comment. 64579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return ""; 65579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 66579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 67579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 68579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 69579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public int codeSize() { 70579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return 1; 71579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 72579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 73579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 74579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 75579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public boolean isCompatible(DalvInsn insn) { 76579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson if (!(insn instanceof SimpleInsn)) { 77579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return false; 78579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 79579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 80579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList regs = insn.getRegisters(); 81579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpec rs1; 82579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpec rs2; 83579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 84579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson switch (regs.size()) { 85579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson case 2: { 86579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson rs1 = regs.get(0); 87579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson rs2 = regs.get(1); 88579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson break; 89579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 90579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson case 3: { 91579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /* 92579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * This format is allowed for ops that are effectively 93579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 3-arg but where the first two args are identical. 94579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 95579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson rs1 = regs.get(1); 96579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson rs2 = regs.get(2); 97579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson if (rs1.getReg() != regs.get(0).getReg()) { 98579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return false; 99579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 100579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson break; 101579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 102579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson default: { 103579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return false; 104579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 105579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 106579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 107579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return unsignedFitsInNibble(rs1.getReg()) && 108579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson unsignedFitsInNibble(rs2.getReg()); 109579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 110579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 111579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 112579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 113579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public BitSet compatibleRegs(DalvInsn insn) { 114579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList regs = insn.getRegisters(); 115579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson BitSet bits = new BitSet(2); 116579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 117579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson bits.set(0, unsignedFitsInNibble(regs.get(0).getReg())); 118579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson bits.set(1, unsignedFitsInNibble(regs.get(1).getReg())); 119579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return bits; 120579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 121579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 122579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** {@inheritDoc} */ 123579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson @Override 124579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public void writeTo(AnnotatedOutput out, DalvInsn insn) { 125579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson RegisterSpecList regs = insn.getRegisters(); 126579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson int sz = regs.size(); 127579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 128579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /* 129579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * The (sz - 2) and (sz - 1) below makes this code work for 130579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * both the two- and three-register ops. (See "case 3" in 131579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * isCompatible(), above.) 132579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 133579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 134579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson write(out, opcodeUnit(insn, 135579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson makeByte(regs.get(sz - 2).getReg(), 136579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson regs.get(sz - 1).getReg()))); 137579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 138579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson} 139