1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.dx.dex.code.form; 18 19import com.android.dx.dex.code.CstInsn; 20import com.android.dx.dex.code.DalvInsn; 21import com.android.dx.dex.code.InsnFormat; 22import com.android.dx.rop.code.RegisterSpecList; 23import com.android.dx.rop.cst.Constant; 24import com.android.dx.rop.cst.CstFieldRef; 25import com.android.dx.rop.cst.CstType; 26import com.android.dx.util.AnnotatedOutput; 27 28import java.util.BitSet; 29 30/** 31 * Instruction format {@code 52c}. See the instruction format spec 32 * for details. 33 */ 34public final class Form52c extends InsnFormat { 35 /** {@code non-null;} unique instance of this class */ 36 public static final InsnFormat THE_ONE = new Form52c(); 37 38 /** 39 * Constructs an instance. This class is not publicly 40 * instantiable. Use {@link #THE_ONE}. 41 */ 42 private Form52c() { 43 // This space intentionally left blank. 44 } 45 46 /** {@inheritDoc} */ 47 @Override 48 public String insnArgString(DalvInsn insn) { 49 RegisterSpecList regs = insn.getRegisters(); 50 return regs.get(0).regString() + ", " + regs.get(1).regString() + 51 ", " + cstString(insn); 52 } 53 54 /** {@inheritDoc} */ 55 @Override 56 public String insnCommentString(DalvInsn insn, boolean noteIndices) { 57 if (noteIndices) { 58 return cstComment(insn); 59 } else { 60 return ""; 61 } 62 } 63 64 /** {@inheritDoc} */ 65 @Override 66 public int codeSize() { 67 return 5; 68 } 69 70 /** {@inheritDoc} */ 71 @Override 72 public boolean isCompatible(DalvInsn insn) { 73 if (! ALLOW_EXTENDED_OPCODES) { 74 return false; 75 } 76 77 RegisterSpecList regs = insn.getRegisters(); 78 if (!((insn instanceof CstInsn) && 79 (regs.size() == 2) && 80 unsignedFitsInShort(regs.get(0).getReg()) && 81 unsignedFitsInShort(regs.get(1).getReg()))) { 82 return false; 83 } 84 85 CstInsn ci = (CstInsn) insn; 86 Constant cst = ci.getConstant(); 87 88 return (cst instanceof CstType) || 89 (cst instanceof CstFieldRef); 90 } 91 92 /** {@inheritDoc} */ 93 @Override 94 public BitSet compatibleRegs(DalvInsn insn) { 95 RegisterSpecList regs = insn.getRegisters(); 96 BitSet bits = new BitSet(2); 97 98 bits.set(0, unsignedFitsInShort(regs.get(0).getReg())); 99 bits.set(1, unsignedFitsInShort(regs.get(1).getReg())); 100 return bits; 101 } 102 103 /** {@inheritDoc} */ 104 @Override 105 public void writeTo(AnnotatedOutput out, DalvInsn insn) { 106 RegisterSpecList regs = insn.getRegisters(); 107 int cpi = ((CstInsn) insn).getIndex(); 108 109 write(out, 110 opcodeUnit(insn), 111 cpi, 112 (short) regs.get(0).getReg(), 113 (short) regs.get(1).getReg()); 114 } 115} 116