1579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/* 2579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Copyright (C) 2007 The Android Open Source Project 3579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 4579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Licensed under the Apache License, Version 2.0 (the "License"); 5579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * you may not use this file except in compliance with the License. 6579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * You may obtain a copy of the License at 7579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 8579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 9579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 10579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Unless required by applicable law or agreed to in writing, software 11579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 12579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * See the License for the specific language governing permissions and 14579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * limitations under the License. 15579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 16579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 17579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpackage com.android.dx.io; 18579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 19579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson/** 20579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * All the Dalvik opcode value constants. See the related spec 21579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * document for the meaning and instruction format of each opcode. 22579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 23579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilsonpublic final class Opcodes { 24579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 25579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * pseudo-opcode used for nonstandard format payload "instructions". TODO: 26579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Retire this concept, and start treating the payload instructions 27579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * more like the rest. 28579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 29579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPECIAL_FORMAT = -1; 30579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 31579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 32579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * pseudo-opcode used to indicate there is no next opcode; used 33579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * in opcode chaining lists 34579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 35579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int NO_NEXT = -1; 36579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 37579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** minimum valid opcode value */ 38579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MIN_VALUE = -1; 39579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 40579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** maximum valid opcode value */ 41579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MAX_VALUE = 0xffff; 42579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 43579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // BEGIN(opcodes); GENERATED AUTOMATICALLY BY opcode-gen 44579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int NOP = 0x00; 45579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE = 0x01; 46579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE_FROM16 = 0x02; 47579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE_16 = 0x03; 48579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE_WIDE = 0x04; 49579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE_WIDE_FROM16 = 0x05; 50579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE_WIDE_16 = 0x06; 51579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE_OBJECT = 0x07; 52579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE_OBJECT_FROM16 = 0x08; 53579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE_OBJECT_16 = 0x09; 54579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE_RESULT = 0x0a; 55579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE_RESULT_WIDE = 0x0b; 56579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE_RESULT_OBJECT = 0x0c; 57579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MOVE_EXCEPTION = 0x0d; 58579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int RETURN_VOID = 0x0e; 59579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int RETURN = 0x0f; 60579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int RETURN_WIDE = 0x10; 61579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int RETURN_OBJECT = 0x11; 62579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CONST_4 = 0x12; 63579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CONST_16 = 0x13; 64579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CONST = 0x14; 65579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CONST_HIGH16 = 0x15; 66579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CONST_WIDE_16 = 0x16; 67579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CONST_WIDE_32 = 0x17; 68579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CONST_WIDE = 0x18; 69579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CONST_WIDE_HIGH16 = 0x19; 70579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CONST_STRING = 0x1a; 71579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CONST_STRING_JUMBO = 0x1b; 72579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CONST_CLASS = 0x1c; 73579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MONITOR_ENTER = 0x1d; 74579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MONITOR_EXIT = 0x1e; 75579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CHECK_CAST = 0x1f; 76579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INSTANCE_OF = 0x20; 77579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int ARRAY_LENGTH = 0x21; 78579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int NEW_INSTANCE = 0x22; 79579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int NEW_ARRAY = 0x23; 80579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int FILLED_NEW_ARRAY = 0x24; 81579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int FILLED_NEW_ARRAY_RANGE = 0x25; 82579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int FILL_ARRAY_DATA = 0x26; 83579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int THROW = 0x27; 84579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int GOTO = 0x28; 85579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int GOTO_16 = 0x29; 86579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int GOTO_32 = 0x2a; 87579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int PACKED_SWITCH = 0x2b; 88579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPARSE_SWITCH = 0x2c; 89579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CMPL_FLOAT = 0x2d; 90579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CMPG_FLOAT = 0x2e; 91579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CMPL_DOUBLE = 0x2f; 92579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CMPG_DOUBLE = 0x30; 93579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CMP_LONG = 0x31; 94579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IF_EQ = 0x32; 95579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IF_NE = 0x33; 96579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IF_LT = 0x34; 97579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IF_GE = 0x35; 98579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IF_GT = 0x36; 99579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IF_LE = 0x37; 100579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IF_EQZ = 0x38; 101579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IF_NEZ = 0x39; 102579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IF_LTZ = 0x3a; 103579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IF_GEZ = 0x3b; 104579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IF_GTZ = 0x3c; 105579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IF_LEZ = 0x3d; 106579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AGET = 0x44; 107579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AGET_WIDE = 0x45; 108579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AGET_OBJECT = 0x46; 109579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AGET_BOOLEAN = 0x47; 110579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AGET_BYTE = 0x48; 111579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AGET_CHAR = 0x49; 112579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AGET_SHORT = 0x4a; 113579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int APUT = 0x4b; 114579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int APUT_WIDE = 0x4c; 115579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int APUT_OBJECT = 0x4d; 116579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int APUT_BOOLEAN = 0x4e; 117579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int APUT_BYTE = 0x4f; 118579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int APUT_CHAR = 0x50; 119579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int APUT_SHORT = 0x51; 120579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET = 0x52; 121579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_WIDE = 0x53; 122579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_OBJECT = 0x54; 123579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_BOOLEAN = 0x55; 124579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_BYTE = 0x56; 125579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_CHAR = 0x57; 126579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_SHORT = 0x58; 127579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT = 0x59; 128579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_WIDE = 0x5a; 129579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_OBJECT = 0x5b; 130579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_BOOLEAN = 0x5c; 131579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_BYTE = 0x5d; 132579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_CHAR = 0x5e; 133579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_SHORT = 0x5f; 134579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET = 0x60; 135579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_WIDE = 0x61; 136579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_OBJECT = 0x62; 137579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_BOOLEAN = 0x63; 138579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_BYTE = 0x64; 139579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_CHAR = 0x65; 140579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_SHORT = 0x66; 141579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT = 0x67; 142579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_WIDE = 0x68; 143579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_OBJECT = 0x69; 144579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_BOOLEAN = 0x6a; 145579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_BYTE = 0x6b; 146579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_CHAR = 0x6c; 147579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_SHORT = 0x6d; 148579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_VIRTUAL = 0x6e; 149579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_SUPER = 0x6f; 150579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_DIRECT = 0x70; 151579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_STATIC = 0x71; 152579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_INTERFACE = 0x72; 153579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_VIRTUAL_RANGE = 0x74; 154579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_SUPER_RANGE = 0x75; 155579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_DIRECT_RANGE = 0x76; 156579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_STATIC_RANGE = 0x77; 157579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_INTERFACE_RANGE = 0x78; 158579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int NEG_INT = 0x7b; 159579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int NOT_INT = 0x7c; 160579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int NEG_LONG = 0x7d; 161579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int NOT_LONG = 0x7e; 162579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int NEG_FLOAT = 0x7f; 163579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int NEG_DOUBLE = 0x80; 164579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INT_TO_LONG = 0x81; 165579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INT_TO_FLOAT = 0x82; 166579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INT_TO_DOUBLE = 0x83; 167579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int LONG_TO_INT = 0x84; 168579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int LONG_TO_FLOAT = 0x85; 169579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int LONG_TO_DOUBLE = 0x86; 170579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int FLOAT_TO_INT = 0x87; 171579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int FLOAT_TO_LONG = 0x88; 172579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int FLOAT_TO_DOUBLE = 0x89; 173579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DOUBLE_TO_INT = 0x8a; 174579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DOUBLE_TO_LONG = 0x8b; 175579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DOUBLE_TO_FLOAT = 0x8c; 176579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INT_TO_BYTE = 0x8d; 177579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INT_TO_CHAR = 0x8e; 178579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INT_TO_SHORT = 0x8f; 179579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int ADD_INT = 0x90; 180579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SUB_INT = 0x91; 181579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MUL_INT = 0x92; 182579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DIV_INT = 0x93; 183579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int REM_INT = 0x94; 184579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AND_INT = 0x95; 185579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int OR_INT = 0x96; 186579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int XOR_INT = 0x97; 187579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SHL_INT = 0x98; 188579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SHR_INT = 0x99; 189579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int USHR_INT = 0x9a; 190579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int ADD_LONG = 0x9b; 191579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SUB_LONG = 0x9c; 192579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MUL_LONG = 0x9d; 193579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DIV_LONG = 0x9e; 194579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int REM_LONG = 0x9f; 195579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AND_LONG = 0xa0; 196579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int OR_LONG = 0xa1; 197579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int XOR_LONG = 0xa2; 198579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SHL_LONG = 0xa3; 199579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SHR_LONG = 0xa4; 200579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int USHR_LONG = 0xa5; 201579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int ADD_FLOAT = 0xa6; 202579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SUB_FLOAT = 0xa7; 203579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MUL_FLOAT = 0xa8; 204579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DIV_FLOAT = 0xa9; 205579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int REM_FLOAT = 0xaa; 206579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int ADD_DOUBLE = 0xab; 207579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SUB_DOUBLE = 0xac; 208579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MUL_DOUBLE = 0xad; 209579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DIV_DOUBLE = 0xae; 210579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int REM_DOUBLE = 0xaf; 211579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int ADD_INT_2ADDR = 0xb0; 212579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SUB_INT_2ADDR = 0xb1; 213579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MUL_INT_2ADDR = 0xb2; 214579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DIV_INT_2ADDR = 0xb3; 215579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int REM_INT_2ADDR = 0xb4; 216579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AND_INT_2ADDR = 0xb5; 217579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int OR_INT_2ADDR = 0xb6; 218579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int XOR_INT_2ADDR = 0xb7; 219579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SHL_INT_2ADDR = 0xb8; 220579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SHR_INT_2ADDR = 0xb9; 221579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int USHR_INT_2ADDR = 0xba; 222579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int ADD_LONG_2ADDR = 0xbb; 223579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SUB_LONG_2ADDR = 0xbc; 224579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MUL_LONG_2ADDR = 0xbd; 225579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DIV_LONG_2ADDR = 0xbe; 226579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int REM_LONG_2ADDR = 0xbf; 227579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AND_LONG_2ADDR = 0xc0; 228579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int OR_LONG_2ADDR = 0xc1; 229579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int XOR_LONG_2ADDR = 0xc2; 230579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SHL_LONG_2ADDR = 0xc3; 231579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SHR_LONG_2ADDR = 0xc4; 232579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int USHR_LONG_2ADDR = 0xc5; 233579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int ADD_FLOAT_2ADDR = 0xc6; 234579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SUB_FLOAT_2ADDR = 0xc7; 235579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MUL_FLOAT_2ADDR = 0xc8; 236579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DIV_FLOAT_2ADDR = 0xc9; 237579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int REM_FLOAT_2ADDR = 0xca; 238579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int ADD_DOUBLE_2ADDR = 0xcb; 239579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SUB_DOUBLE_2ADDR = 0xcc; 240579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MUL_DOUBLE_2ADDR = 0xcd; 241579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DIV_DOUBLE_2ADDR = 0xce; 242579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int REM_DOUBLE_2ADDR = 0xcf; 243579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int ADD_INT_LIT16 = 0xd0; 244579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int RSUB_INT = 0xd1; 245579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MUL_INT_LIT16 = 0xd2; 246579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DIV_INT_LIT16 = 0xd3; 247579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int REM_INT_LIT16 = 0xd4; 248579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AND_INT_LIT16 = 0xd5; 249579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int OR_INT_LIT16 = 0xd6; 250579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int XOR_INT_LIT16 = 0xd7; 251579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int ADD_INT_LIT8 = 0xd8; 252579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int RSUB_INT_LIT8 = 0xd9; 253579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int MUL_INT_LIT8 = 0xda; 254579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int DIV_INT_LIT8 = 0xdb; 255579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int REM_INT_LIT8 = 0xdc; 256579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int AND_INT_LIT8 = 0xdd; 257579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int OR_INT_LIT8 = 0xde; 258579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int XOR_INT_LIT8 = 0xdf; 259579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SHL_INT_LIT8 = 0xe0; 260579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SHR_INT_LIT8 = 0xe1; 261579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int USHR_INT_LIT8 = 0xe2; 262579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CONST_CLASS_JUMBO = 0x00ff; 263579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int CHECK_CAST_JUMBO = 0x01ff; 264579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INSTANCE_OF_JUMBO = 0x02ff; 265579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int NEW_INSTANCE_JUMBO = 0x03ff; 266579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int NEW_ARRAY_JUMBO = 0x04ff; 267579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int FILLED_NEW_ARRAY_JUMBO = 0x05ff; 268579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_JUMBO = 0x06ff; 269579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_WIDE_JUMBO = 0x07ff; 270579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_OBJECT_JUMBO = 0x08ff; 271579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_BOOLEAN_JUMBO = 0x09ff; 272579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_BYTE_JUMBO = 0x0aff; 273579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_CHAR_JUMBO = 0x0bff; 274579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IGET_SHORT_JUMBO = 0x0cff; 275579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_JUMBO = 0x0dff; 276579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_WIDE_JUMBO = 0x0eff; 277579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_OBJECT_JUMBO = 0x0fff; 278579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_BOOLEAN_JUMBO = 0x10ff; 279579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_BYTE_JUMBO = 0x11ff; 280579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_CHAR_JUMBO = 0x12ff; 281579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int IPUT_SHORT_JUMBO = 0x13ff; 282579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_JUMBO = 0x14ff; 283579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_WIDE_JUMBO = 0x15ff; 284579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_OBJECT_JUMBO = 0x16ff; 285579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_BOOLEAN_JUMBO = 0x17ff; 286579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_BYTE_JUMBO = 0x18ff; 287579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_CHAR_JUMBO = 0x19ff; 288579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SGET_SHORT_JUMBO = 0x1aff; 289579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_JUMBO = 0x1bff; 290579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_WIDE_JUMBO = 0x1cff; 291579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_OBJECT_JUMBO = 0x1dff; 292579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_BOOLEAN_JUMBO = 0x1eff; 293579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_BYTE_JUMBO = 0x1fff; 294579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_CHAR_JUMBO = 0x20ff; 295579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPUT_SHORT_JUMBO = 0x21ff; 296579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_VIRTUAL_JUMBO = 0x22ff; 297579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_SUPER_JUMBO = 0x23ff; 298579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_DIRECT_JUMBO = 0x24ff; 299579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_STATIC_JUMBO = 0x25ff; 300579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int INVOKE_INTERFACE_JUMBO = 0x26ff; 301579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // END(opcodes) 302579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 303579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // TODO: Generate these payload opcodes with opcode-gen. 304579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 305579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 306579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * special pseudo-opcode value for packed-switch data payload 307579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * instructions 308579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 309579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int PACKED_SWITCH_PAYLOAD = 0x100; 310579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 311579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** special pseudo-opcode value for packed-switch data payload 312579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * instructions 313579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 314579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int SPARSE_SWITCH_PAYLOAD = 0x200; 315579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 316579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** special pseudo-opcode value for fill-array-data data payload 317579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * instructions 318579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 319579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static final int FILL_ARRAY_DATA_PAYLOAD = 0x300; 320579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 321579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 322579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * This class is uninstantiable. 323579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 324579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson private Opcodes() { 325579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // This space intentionally left blank. 326579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 327579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 328579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 329579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Determines if the given opcode has the right "shape" to be 330579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * valid. This includes the range {@code 0x01..0xfe}, the range 331579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * {@code 0x00ff..0xffff} where the low-order byte is either 332579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * {@code 0} or {@code 0xff}, and the special opcode values {@code 333579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * SPECIAL_FORMAT} and {@code NO_NEXT}. Note that not all of the 334579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * opcode values that pass this test are in fact used. This method 335579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * is meant to perform a quick check to reject blatantly wrong 336579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * values (e.g. when validating arguments). 337579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 338579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * @param opcode the opcode value 339579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * @return {@code true} iff the value has the right "shape" to be 340579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * possibly valid 341579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 342579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static boolean isValidShape(int opcode) { 343579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /* 344579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Note: This method bakes in knowledge that all opcodes are 345579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * one of the forms: 346579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 347579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * * single byte in range 0x01..0xfe -- normal opcodes 348579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * * (byteValue << 8) -- nop and data payload opcodes 349579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * * ((byteValue << 8) | 0xff) -- 16-bit extended opcodes 350579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * * SPECIAL_FORMAT or NO_NEXT -- pseudo-opcodes 351579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 352579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 353579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson // Note: SPECIAL_FORMAT == NO_NEXT. 354579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson if (opcode < SPECIAL_FORMAT) { 355579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return false; 356579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } else if (opcode == SPECIAL_FORMAT) { 357579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return true; 358579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 359579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 360579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson int lowByte = opcode & 0xff; 361579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson if ((lowByte == 0) || (lowByte == 0xff)) { 362579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return true; 363579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 364579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 365579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return (opcode & 0xff00) == 0; 366579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 367579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 368579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 369579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Gets whether ({@code true}) or not ({@code false}) the given 370579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * opcode value is an "extended" opcode (not counting the nop-like 371579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * payload opcodes). Extended opcodes require a full 16-bit code 372579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * unit to represent, without leaving space for an argument byte. 373579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 374579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * @param opcode the opcode value 375579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * @return {@code true} iff the opcode is an "extended" opcode 376579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 377579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static boolean isExtended(int opcode) { 378579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /* 379579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Note: Extended opcodes all have the form ((byteValue << 8) 380579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * | 0xff). 381579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 382579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return (opcode >= 0x00ff); 383579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 384579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 385579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /** 386579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Gets the opcode out of an opcode unit, the latter of which may also 387579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * include one or more argument values. 388579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * 389579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * @param opcodeUnit the opcode-containing code unit 390579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * @return the extracted opcode 391579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 392579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson public static int extractOpcodeFromUnit(int opcodeUnit) { 393579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson /* 394579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * Note: This method bakes in knowledge that all opcodes are 395579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * either single-byte or of the forms (byteValue << 8) or 396579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson * ((byteValue << 8) | 0xff). 397579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson */ 398579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson 399579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson int lowByte = opcodeUnit & 0xff; 400579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson return ((lowByte == 0) || (lowByte == 0xff)) ? opcodeUnit : lowByte; 401579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson } 402579d7739c53a2707ad711a2d2cae46d7d782f06Jesse Wilson} 403