content: /*
   * 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.taobao.android.dx.io;
  
  /**
   * All the Dalvik opcode value constants. See the related spec
   * document for the meaning and instruction format of each opcode.
   */
  public final class Opcodes {
      /**
       * pseudo-opcode used for nonstandard format payload "instructions". TODO:
       * Retire this concept, and start treating the payload instructions
       * more like the rest.
       */
      public static final int SPECIAL_FORMAT = -1;
  
      /**
       * pseudo-opcode used to indicate there is no next opcode; used
       * in opcode chaining lists
       */
      public static final int NO_NEXT = -1;
  
      /** minimum valid opcode value */
      public static final int MIN_VALUE = -1;
  
      /** maximum valid opcode value */
      public static final int MAX_VALUE = 0xffff;
  
      // BEGIN(opcodes); GENERATED AUTOMATICALLY BY opcode-gen
      public static final int NOP = 0x00;
      public static final int MOVE = 0x01;
      public static final int MOVE_FROM16 = 0x02;
      public static final int MOVE_16 = 0x03;
      public static final int MOVE_WIDE = 0x04;
      public static final int MOVE_WIDE_FROM16 = 0x05;
      public static final int MOVE_WIDE_16 = 0x06;
      public static final int MOVE_OBJECT = 0x07;
      public static final int MOVE_OBJECT_FROM16 = 0x08;
      public static final int MOVE_OBJECT_16 = 0x09;
      public static final int MOVE_RESULT = 0x0a;
      public static final int MOVE_RESULT_WIDE = 0x0b;
      public static final int MOVE_RESULT_OBJECT = 0x0c;
      public static final int MOVE_EXCEPTION = 0x0d;
      public static final int RETURN_VOID = 0x0e;
      public static final int RETURN = 0x0f;
      public static final int RETURN_WIDE = 0x10;
      public static final int RETURN_OBJECT = 0x11;
      public static final int CONST_4 = 0x12;
      public static final int CONST_16 = 0x13;
      public static final int CONST = 0x14;
      public static final int CONST_HIGH16 = 0x15;
      public static final int CONST_WIDE_16 = 0x16;
      public static final int CONST_WIDE_32 = 0x17;
      public static final int CONST_WIDE = 0x18;
      public static final int CONST_WIDE_HIGH16 = 0x19;
      public static final int CONST_STRING = 0x1a;
      public static final int CONST_STRING_JUMBO = 0x1b;
      public static final int CONST_CLASS = 0x1c;
      public static final int MONITOR_ENTER = 0x1d;
      public static final int MONITOR_EXIT = 0x1e;
      public static final int CHECK_CAST = 0x1f;
      public static final int INSTANCE_OF = 0x20;
      public static final int ARRAY_LENGTH = 0x21;
      public static final int NEW_INSTANCE = 0x22;
      public static final int NEW_ARRAY = 0x23;
      public static final int FILLED_NEW_ARRAY = 0x24;
      public static final int FILLED_NEW_ARRAY_RANGE = 0x25;
      public static final int FILL_ARRAY_DATA = 0x26;
      public static final int THROW = 0x27;
      public static final int GOTO = 0x28;
      public static final int GOTO_16 = 0x29;
      public static final int GOTO_32 = 0x2a;
      public static final int PACKED_SWITCH = 0x2b;
      public static final int SPARSE_SWITCH = 0x2c;
      public static final int CMPL_FLOAT = 0x2d;
      public static final int CMPG_FLOAT = 0x2e;
      public static final int CMPL_DOUBLE = 0x2f;
      public static final int CMPG_DOUBLE = 0x30;
      public static final int CMP_LONG = 0x31;
      public static final int IF_EQ = 0x32;
      public static final int IF_NE = 0x33;
      public static final int IF_LT = 0x34;
      public static final int IF_GE = 0x35;
      public static final int IF_GT = 0x36;
      public static final int IF_LE = 0x37;
      public static final int IF_EQZ = 0x38;
      public static final int IF_NEZ = 0x39;
      public static final int IF_LTZ = 0x3a;
      public static final int IF_GEZ = 0x3b;
      public static final int IF_GTZ = 0x3c;
      public static final int IF_LEZ = 0x3d;
      public static final int AGET = 0x44;
      public static final int AGET_WIDE = 0x45;
      public static final int AGET_OBJECT = 0x46;
      public static final int AGET_BOOLEAN = 0x47;
      public static final int AGET_BYTE = 0x48;
      public static final int AGET_CHAR = 0x49;
      public static final int AGET_SHORT = 0x4a;
      public static final int APUT = 0x4b;
      public static final int APUT_WIDE = 0x4c;
      public static final int APUT_OBJECT = 0x4d;
      public static final int APUT_BOOLEAN = 0x4e;
      public static final int APUT_BYTE = 0x4f;
      public static final int APUT_CHAR = 0x50;
      public static final int APUT_SHORT = 0x51;
      public static final int IGET = 0x52;
      public static final int IGET_WIDE = 0x53;
      public static final int IGET_OBJECT = 0x54;
      public static final int IGET_BOOLEAN = 0x55;
      public static final int IGET_BYTE = 0x56;
      public static final int IGET_CHAR = 0x57;
      public static final int IGET_SHORT = 0x58;
      public static final int IPUT = 0x59;
      public static final int IPUT_WIDE = 0x5a;
      public static final int IPUT_OBJECT = 0x5b;
      public static final int IPUT_BOOLEAN = 0x5c;
      public static final int IPUT_BYTE = 0x5d;
      public static final int IPUT_CHAR = 0x5e;
      public static final int IPUT_SHORT = 0x5f;
      public static final int SGET = 0x60;
      public static final int SGET_WIDE = 0x61;
      public static final int SGET_OBJECT = 0x62;
      public static final int SGET_BOOLEAN = 0x63;
      public static final int SGET_BYTE = 0x64;
      public static final int SGET_CHAR = 0x65;
      public static final int SGET_SHORT = 0x66;
      public static final int SPUT = 0x67;
      public static final int SPUT_WIDE = 0x68;
      public static final int SPUT_OBJECT = 0x69;
      public static final int SPUT_BOOLEAN = 0x6a;
      public static final int SPUT_BYTE = 0x6b;
      public static final int SPUT_CHAR = 0x6c;
      public static final int SPUT_SHORT = 0x6d;
      public static final int INVOKE_VIRTUAL = 0x6e;
      public static final int INVOKE_SUPER = 0x6f;
      public static final int INVOKE_DIRECT = 0x70;
      public static final int INVOKE_STATIC = 0x71;
      public static final int INVOKE_INTERFACE = 0x72;
      public static final int INVOKE_VIRTUAL_RANGE = 0x74;
      public static final int INVOKE_SUPER_RANGE = 0x75;
      public static final int INVOKE_DIRECT_RANGE = 0x76;
      public static final int INVOKE_STATIC_RANGE = 0x77;
      public static final int INVOKE_INTERFACE_RANGE = 0x78;
      public static final int NEG_INT = 0x7b;
      public static final int NOT_INT = 0x7c;
      public static final int NEG_LONG = 0x7d;
      public static final int NOT_LONG = 0x7e;
      public static final int NEG_FLOAT = 0x7f;
      public static final int NEG_DOUBLE = 0x80;
      public static final int INT_TO_LONG = 0x81;
      public static final int INT_TO_FLOAT = 0x82;
      public static final int INT_TO_DOUBLE = 0x83;
      public static final int LONG_TO_INT = 0x84;
      public static final int LONG_TO_FLOAT = 0x85;
      public static final int LONG_TO_DOUBLE = 0x86;
      public static final int FLOAT_TO_INT = 0x87;
      public static final int FLOAT_TO_LONG = 0x88;
      public static final int FLOAT_TO_DOUBLE = 0x89;
      public static final int DOUBLE_TO_INT = 0x8a;
      public static final int DOUBLE_TO_LONG = 0x8b;
      public static final int DOUBLE_TO_FLOAT = 0x8c;
      public static final int INT_TO_BYTE = 0x8d;
      public static final int INT_TO_CHAR = 0x8e;
      public static final int INT_TO_SHORT = 0x8f;
      public static final int ADD_INT = 0x90;
      public static final int SUB_INT = 0x91;
      public static final int MUL_INT = 0x92;
      public static final int DIV_INT = 0x93;
      public static final int REM_INT = 0x94;
      public static final int AND_INT = 0x95;
      public static final int OR_INT = 0x96;
      public static final int XOR_INT = 0x97;
      public static final int SHL_INT = 0x98;
      public static final int SHR_INT = 0x99;
      public static final int USHR_INT = 0x9a;
      public static final int ADD_LONG = 0x9b;
      public static final int SUB_LONG = 0x9c;
      public static final int MUL_LONG = 0x9d;
      public static final int DIV_LONG = 0x9e;
      public static final int REM_LONG = 0x9f;
      public static final int AND_LONG = 0xa0;
      public static final int OR_LONG = 0xa1;
      public static final int XOR_LONG = 0xa2;
      public static final int SHL_LONG = 0xa3;
      public static final int SHR_LONG = 0xa4;
      public static final int USHR_LONG = 0xa5;
      public static final int ADD_FLOAT = 0xa6;
      public static final int SUB_FLOAT = 0xa7;
      public static final int MUL_FLOAT = 0xa8;
      public static final int DIV_FLOAT = 0xa9;
      public static final int REM_FLOAT = 0xaa;
      public static final int ADD_DOUBLE = 0xab;
      public static final int SUB_DOUBLE = 0xac;
      public static final int MUL_DOUBLE = 0xad;
      public static final int DIV_DOUBLE = 0xae;
      public static final int REM_DOUBLE = 0xaf;
      public static final int ADD_INT_2ADDR = 0xb0;
      public static final int SUB_INT_2ADDR = 0xb1;
      public static final int MUL_INT_2ADDR = 0xb2;
      public static final int DIV_INT_2ADDR = 0xb3;
      public static final int REM_INT_2ADDR = 0xb4;
      public static final int AND_INT_2ADDR = 0xb5;
      public static final int OR_INT_2ADDR = 0xb6;
      public static final int XOR_INT_2ADDR = 0xb7;
      public static final int SHL_INT_2ADDR = 0xb8;
      public static final int SHR_INT_2ADDR = 0xb9;
      public static final int USHR_INT_2ADDR = 0xba;
      public static final int ADD_LONG_2ADDR = 0xbb;
      public static final int SUB_LONG_2ADDR = 0xbc;
      public static final int MUL_LONG_2ADDR = 0xbd;
      public static final int DIV_LONG_2ADDR = 0xbe;
      public static final int REM_LONG_2ADDR = 0xbf;
      public static final int AND_LONG_2ADDR = 0xc0;
      public static final int OR_LONG_2ADDR = 0xc1;
      public static final int XOR_LONG_2ADDR = 0xc2;
      public static final int SHL_LONG_2ADDR = 0xc3;
      public static final int SHR_LONG_2ADDR = 0xc4;
      public static final int USHR_LONG_2ADDR = 0xc5;
      public static final int ADD_FLOAT_2ADDR = 0xc6;
      public static final int SUB_FLOAT_2ADDR = 0xc7;
      public static final int MUL_FLOAT_2ADDR = 0xc8;
      public static final int DIV_FLOAT_2ADDR = 0xc9;
      public static final int REM_FLOAT_2ADDR = 0xca;
      public static final int ADD_DOUBLE_2ADDR = 0xcb;
      public static final int SUB_DOUBLE_2ADDR = 0xcc;
      public static final int MUL_DOUBLE_2ADDR = 0xcd;
      public static final int DIV_DOUBLE_2ADDR = 0xce;
      public static final int REM_DOUBLE_2ADDR = 0xcf;
      public static final int ADD_INT_LIT16 = 0xd0;
      public static final int RSUB_INT = 0xd1;
      public static final int MUL_INT_LIT16 = 0xd2;
      public static final int DIV_INT_LIT16 = 0xd3;
      public static final int REM_INT_LIT16 = 0xd4;
      public static final int AND_INT_LIT16 = 0xd5;
      public static final int OR_INT_LIT16 = 0xd6;
      public static final int XOR_INT_LIT16 = 0xd7;
      public static final int ADD_INT_LIT8 = 0xd8;
      public static final int RSUB_INT_LIT8 = 0xd9;
      public static final int MUL_INT_LIT8 = 0xda;
      public static final int DIV_INT_LIT8 = 0xdb;
      public static final int REM_INT_LIT8 = 0xdc;
      public static final int AND_INT_LIT8 = 0xdd;
      public static final int OR_INT_LIT8 = 0xde;
      public static final int XOR_INT_LIT8 = 0xdf;
      public static final int SHL_INT_LIT8 = 0xe0;
      public static final int SHR_INT_LIT8 = 0xe1;
      public static final int USHR_INT_LIT8 = 0xe2;
      // END(opcodes)
  
      // TODO: Generate these payload opcodes with opcode-gen.
  
      /**
       * special pseudo-opcode value for packed-switch data payload
       * instructions
       */
      public static final int PACKED_SWITCH_PAYLOAD = 0x100;
  
      /** special pseudo-opcode value for packed-switch data payload
       * instructions
       */
      public static final int SPARSE_SWITCH_PAYLOAD = 0x200;
  
      /** special pseudo-opcode value for fill-array-data data payload
       * instructions
       */
      public static final int FILL_ARRAY_DATA_PAYLOAD = 0x300;
  
      /**
       * This class is uninstantiable.
       */
      private Opcodes() {
          // This space intentionally left blank.
      }
  
      /**
       * Determines if the given opcode has the right "shape" to be
       * valid. This includes the range {@code 0x01..0xfe}, the range
       * {@code 0x00ff..0xffff} where the low-order byte is either
       * {@code 0} or {@code 0xff}, and the special opcode values {@code
       * SPECIAL_FORMAT} and {@code NO_NEXT}. Note that not all of the
       * opcode values that pass this test are in fact used. This method
       * is meant to perform a quick check to reject blatantly wrong
       * values (e.g. when validating arguments).
       *
       * @param opcode the opcode value
       * @return {@code true} iff the value has the right "shape" to be
       * possibly valid
       */
      public static boolean isValidShape(int opcode) {
          /*
           * Note: This method bakes in knowledge that all opcodes are
           * one of the forms:
           *
           *   * single byte in range 0x01..0xfe -- normal opcodes
           *   * (byteValue << 8) -- nop and data payload opcodes
           *   * ((byteValue << 8) | 0xff) -- 16-bit extended opcodes
           *   * SPECIAL_FORMAT or NO_NEXT -- pseudo-opcodes
           */
  
          // Note: SPECIAL_FORMAT == NO_NEXT.
          if (opcode < SPECIAL_FORMAT) {
              return false;
          } else if (opcode == SPECIAL_FORMAT) {
              return true;
          }
  
          int lowByte = opcode & 0xff;
          if ((lowByte == 0) || (lowByte == 0xff)) {
              return true;
          }
  
          return (opcode & 0xff00) == 0;
      }
  
      /**
       * Gets the opcode out of an opcode unit, the latter of which may also
       * include one or more argument values.
       *
       * @param opcodeUnit the opcode-containing code unit
       * @return the extracted opcode
       */
      public static int extractOpcodeFromUnit(int opcodeUnit) {
          /*
           * Note: This method bakes in knowledge that all opcodes are
           * either single-byte or of the forms (byteValue << 8) or
           * ((byteValue << 8) | 0xff).
           */
  
          int lowByte = opcodeUnit & 0xff;
          return ((lowByte == 0) || (lowByte == 0xff)) ? opcodeUnit : lowByte;
      }
  }
  