| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.dx.dex.code.form; |
| |
| import com.android.dx.dex.code.CstInsn; |
| import com.android.dx.dex.code.DalvInsn; |
| import com.android.dx.dex.code.InsnFormat; |
| import com.android.dx.rop.code.RegisterSpec; |
| import com.android.dx.rop.code.RegisterSpecList; |
| import com.android.dx.rop.cst.Constant; |
| import com.android.dx.rop.cst.CstMethodRef; |
| import com.android.dx.rop.cst.CstType; |
| import com.android.dx.util.AnnotatedOutput; |
| |
| /** |
| * Instruction format {@code 3rc}. See the instruction format spec |
| * for details. |
| */ |
| public final class Form3rc extends InsnFormat { |
| /** {@code non-null;} unique instance of this class */ |
| public static final InsnFormat THE_ONE = new Form3rc(); |
| |
| /** |
| * Constructs an instance. This class is not publicly |
| * instantiable. Use {@link #THE_ONE}. |
| */ |
| private Form3rc() { |
| // This space intentionally left blank. |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public String insnArgString(DalvInsn insn) { |
| RegisterSpecList regs = insn.getRegisters(); |
| int size = regs.size(); |
| StringBuilder sb = new StringBuilder(30); |
| |
| sb.append("{"); |
| |
| switch (size) { |
| case 0: { |
| // Nothing to do. |
| break; |
| } |
| case 1: { |
| sb.append(regs.get(0).regString()); |
| break; |
| } |
| default: { |
| RegisterSpec lastReg = regs.get(size - 1); |
| if (lastReg.getCategory() == 2) { |
| /* |
| * Add one to properly represent a list-final |
| * category-2 register. |
| */ |
| lastReg = lastReg.withOffset(1); |
| } |
| |
| sb.append(regs.get(0).regString()); |
| sb.append(".."); |
| sb.append(lastReg.regString()); |
| } |
| } |
| |
| sb.append("}, "); |
| sb.append(cstString(insn)); |
| |
| return sb.toString(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public String insnCommentString(DalvInsn insn, boolean noteIndices) { |
| if (noteIndices) { |
| return cstComment(insn); |
| } else { |
| return ""; |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int codeSize() { |
| return 3; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public boolean isCompatible(DalvInsn insn) { |
| if (!(insn instanceof CstInsn)) { |
| return false; |
| } |
| |
| CstInsn ci = (CstInsn) insn; |
| int cpi = ci.getIndex(); |
| |
| if (! unsignedFitsInShort(cpi)) { |
| return false; |
| } |
| |
| Constant cst = ci.getConstant(); |
| if (!((cst instanceof CstMethodRef) || |
| (cst instanceof CstType))) { |
| return false; |
| } |
| |
| RegisterSpecList regs = ci.getRegisters(); |
| int sz = regs.size(); |
| |
| if (sz == 0) { |
| return true; |
| } |
| |
| int first = regs.get(0).getReg(); |
| int next = first; |
| |
| if (!unsignedFitsInShort(first)) { |
| return false; |
| } |
| |
| for (int i = 0; i < sz; i++) { |
| RegisterSpec one = regs.get(i); |
| if (one.getReg() != next) { |
| return false; |
| } |
| next += one.getCategory(); |
| } |
| |
| return unsignedFitsInByte(next - first); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public InsnFormat nextUp() { |
| return null; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void writeTo(AnnotatedOutput out, DalvInsn insn) { |
| RegisterSpecList regs = insn.getRegisters(); |
| int sz = regs.size(); |
| int cpi = ((CstInsn) insn).getIndex(); |
| int firstReg; |
| int count; |
| |
| if (sz == 0) { |
| firstReg = 0; |
| count = 0; |
| } else { |
| int lastReg = regs.get(sz - 1).getNextReg(); |
| firstReg = regs.get(0).getReg(); |
| count = lastReg - firstReg; |
| } |
| |
| write(out, |
| opcodeUnit(insn, count), |
| (short) cpi, |
| (short) firstReg); |
| } |
| } |