| /* |
| * 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.DalvInsn; |
| import com.android.dx.dex.code.InsnFormat; |
| import com.android.dx.dex.code.TargetInsn; |
| import com.android.dx.rop.code.RegisterSpecList; |
| import com.android.dx.util.AnnotatedOutput; |
| |
| /** |
| * Instruction format <code>31t</code>. See the instruction format spec |
| * for details. |
| */ |
| public final class Form31t extends InsnFormat { |
| /** non-null; unique instance of this class */ |
| public static final InsnFormat THE_ONE = new Form31t(); |
| |
| /** |
| * Constructs an instance. This class is not publicly |
| * instantiable. Use {@link #THE_ONE}. |
| */ |
| private Form31t() { |
| // This space intentionally left blank. |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public String insnArgString(DalvInsn insn) { |
| RegisterSpecList regs = insn.getRegisters(); |
| return regs.get(0).regString() + ", " + branchString(insn); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public String insnCommentString(DalvInsn insn, boolean noteIndices) { |
| return branchComment(insn); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int codeSize() { |
| return 3; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public boolean isCompatible(DalvInsn insn) { |
| RegisterSpecList regs = insn.getRegisters(); |
| |
| if (!((insn instanceof TargetInsn) && |
| (regs.size() == 1) && |
| unsignedFitsInByte(regs.get(0).getReg()))) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public boolean branchFits(TargetInsn insn) { |
| return true; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public InsnFormat nextUp() { |
| return null; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void writeTo(AnnotatedOutput out, DalvInsn insn) { |
| RegisterSpecList regs = insn.getRegisters(); |
| int offset = ((TargetInsn) insn).getTargetOffset(); |
| |
| write(out, opcodeUnit(insn, regs.get(0).getReg()), |
| (short) offset, |
| (short) (offset >> 16)); |
| } |
| } |