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      1 /*
      2  * Copyright (C) 2007 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.CstLiteral64;
     25 import com.android.dx.rop.cst.CstLiteralBits;
     26 import com.android.dx.util.AnnotatedOutput;
     27 import java.util.BitSet;
     28 
     29 /**
     30  * Instruction format {@code 51l}. See the instruction format spec
     31  * for details.
     32  */
     33 public final class Form51l extends InsnFormat {
     34     /** {@code non-null;} unique instance of this class */
     35     public static final InsnFormat THE_ONE = new Form51l();
     36 
     37     /**
     38      * Constructs an instance. This class is not publicly
     39      * instantiable. Use {@link #THE_ONE}.
     40      */
     41     private Form51l() {
     42         // This space intentionally left blank.
     43     }
     44 
     45     /** {@inheritDoc} */
     46     @Override
     47     public String insnArgString(DalvInsn insn) {
     48         RegisterSpecList regs = insn.getRegisters();
     49         CstLiteralBits value = (CstLiteralBits) ((CstInsn) insn).getConstant();
     50 
     51         return regs.get(0).regString() + ", " + literalBitsString(value);
     52     }
     53 
     54     /** {@inheritDoc} */
     55     @Override
     56     public String insnCommentString(DalvInsn insn, boolean noteIndices) {
     57         CstLiteralBits value = (CstLiteralBits) ((CstInsn) insn).getConstant();
     58         return literalBitsComment(value, 64);
     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         RegisterSpecList regs = insn.getRegisters();
     71         if (!((insn instanceof CstInsn) &&
     72               (regs.size() == 1) &&
     73               unsignedFitsInByte(regs.get(0).getReg()))) {
     74             return false;
     75         }
     76 
     77         CstInsn ci = (CstInsn) insn;
     78         Constant cst = ci.getConstant();
     79 
     80         return (cst instanceof CstLiteral64);
     81     }
     82 
     83     /** {@inheritDoc} */
     84     @Override
     85     public BitSet compatibleRegs(DalvInsn insn) {
     86         RegisterSpecList regs = insn.getRegisters();
     87         BitSet bits = new BitSet(1);
     88 
     89         bits.set(0, unsignedFitsInByte(regs.get(0).getReg()));
     90         return bits;
     91     }
     92 
     93     /** {@inheritDoc} */
     94     @Override
     95     public void writeTo(AnnotatedOutput out, DalvInsn insn) {
     96         RegisterSpecList regs = insn.getRegisters();
     97         long value =
     98             ((CstLiteral64) ((CstInsn) insn).getConstant()).getLongBits();
     99 
    100         write(out, opcodeUnit(insn, regs.get(0).getReg()), value);
    101     }
    102 }
    103