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 17 package com.android.dx.dex.code.form; 18 19 import com.android.dx.dex.code.CstInsn; 20 import com.android.dx.dex.code.DalvInsn; 21 import com.android.dx.dex.code.InsnFormat; 22 import com.android.dx.rop.code.RegisterSpecList; 23 import com.android.dx.rop.cst.Constant; 24 import com.android.dx.rop.cst.CstMethodRef; 25 import com.android.dx.rop.cst.CstType; 26 import com.android.dx.util.AnnotatedOutput; 27 28 /** 29 * Instruction format {@code 5rc}. See the instruction format spec 30 * for details. 31 */ 32 public final class Form5rc extends InsnFormat { 33 /** {@code non-null;} unique instance of this class */ 34 public static final InsnFormat THE_ONE = new Form5rc(); 35 36 /** 37 * Constructs an instance. This class is not publicly 38 * instantiable. Use {@link #THE_ONE}. 39 */ 40 private Form5rc() { 41 // This space intentionally left blank. 42 } 43 44 /** {@inheritDoc} */ 45 @Override 46 public String insnArgString(DalvInsn insn) { 47 return regRangeString(insn.getRegisters()) + ", " + 48 cstString(insn); 49 } 50 51 /** {@inheritDoc} */ 52 @Override 53 public String insnCommentString(DalvInsn insn, boolean noteIndices) { 54 if (noteIndices) { 55 return cstComment(insn); 56 } else { 57 return ""; 58 } 59 } 60 61 /** {@inheritDoc} */ 62 @Override 63 public int codeSize() { 64 return 5; 65 } 66 67 /** {@inheritDoc} */ 68 @Override 69 public boolean isCompatible(DalvInsn insn) { 70 if (! ALLOW_EXTENDED_OPCODES) { 71 return false; 72 } 73 74 if (!(insn instanceof CstInsn)) { 75 return false; 76 } 77 78 CstInsn ci = (CstInsn) insn; 79 Constant cst = ci.getConstant(); 80 81 if (!((cst instanceof CstMethodRef) || 82 (cst instanceof CstType))) { 83 return false; 84 } 85 86 RegisterSpecList regs = ci.getRegisters(); 87 int sz = regs.size(); 88 89 return (regs.size() == 0) || 90 (isRegListSequential(regs) && 91 unsignedFitsInShort(regs.get(0).getReg()) && 92 unsignedFitsInShort(regs.getWordCount())); 93 } 94 95 /** {@inheritDoc} */ 96 @Override 97 public void writeTo(AnnotatedOutput out, DalvInsn insn) { 98 RegisterSpecList regs = insn.getRegisters(); 99 int cpi = ((CstInsn) insn).getIndex(); 100 int firstReg = (regs.size() == 0) ? 0 : regs.get(0).getReg(); 101 int count = regs.getWordCount(); 102 103 write(out, opcodeUnit(insn), cpi, (short) count, (short) firstReg); 104 } 105 } 106