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/*
* Copyright (C) 2010 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.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 5rc}. See the instruction format spec
* for details.
*/
public final class Form5rc extends InsnFormat {
/** {@code non-null;} unique instance of this class */
public static final InsnFormat THE_ONE = new Form5rc();
/**
* Constructs an instance. This class is not publicly
* instantiable. Use {@link #THE_ONE}.
*/
private Form5rc() {
// This space intentionally left blank.
}
/** {@inheritDoc} */
@Override
public String insnArgString(DalvInsn insn) {
return regRangeString(insn.getRegisters()) + ", " +
cstString(insn);
}
/** {@inheritDoc} */
@Override
public String insnCommentString(DalvInsn insn, boolean noteIndices) {
if (noteIndices) {
return cstComment(insn);
} else {
return "";
}
}
/** {@inheritDoc} */
@Override
public int codeSize() {
return 5;
}
/** {@inheritDoc} */
@Override
public boolean isCompatible(DalvInsn insn) {
if (! ALLOW_EXTENDED_OPCODES) {
return false;
}
if (!(insn instanceof CstInsn)) {
return false;
}
CstInsn ci = (CstInsn) insn;
Constant cst = ci.getConstant();
if (!((cst instanceof CstMethodRef) ||
(cst instanceof CstType))) {
return false;
}
RegisterSpecList regs = ci.getRegisters();
int sz = regs.size();
return (regs.size() == 0) ||
(isRegListSequential(regs) &&
unsignedFitsInShort(regs.get(0).getReg()) &&
unsignedFitsInShort(regs.getWordCount()));
}
/** {@inheritDoc} */
@Override
public void writeTo(AnnotatedOutput out, DalvInsn insn) {
RegisterSpecList regs = insn.getRegisters();
int cpi = ((CstInsn) insn).getIndex();
int firstReg = (regs.size() == 0) ? 0 : regs.get(0).getReg();
int count = regs.getWordCount();
write(out, opcodeUnit(insn), cpi, (short) count, (short) firstReg);
}
}
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