| /* |
| * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.bytecode; |
| |
| import static org.graalvm.compiler.bytecode.Bytecodes.Flags.ASSOCIATIVE; |
| import static org.graalvm.compiler.bytecode.Bytecodes.Flags.BRANCH; |
| import static org.graalvm.compiler.bytecode.Bytecodes.Flags.COMMUTATIVE; |
| import static org.graalvm.compiler.bytecode.Bytecodes.Flags.FALL_THROUGH; |
| import static org.graalvm.compiler.bytecode.Bytecodes.Flags.FIELD_READ; |
| import static org.graalvm.compiler.bytecode.Bytecodes.Flags.FIELD_WRITE; |
| import static org.graalvm.compiler.bytecode.Bytecodes.Flags.INVOKE; |
| import static org.graalvm.compiler.bytecode.Bytecodes.Flags.LOAD; |
| import static org.graalvm.compiler.bytecode.Bytecodes.Flags.STOP; |
| import static org.graalvm.compiler.bytecode.Bytecodes.Flags.STORE; |
| import static org.graalvm.compiler.bytecode.Bytecodes.Flags.TRAP; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Modifier; |
| |
| /** |
| * Definitions of the standard Java bytecodes defined by |
| * <a href= "http://java.sun.com/docs/books/jvms/second_edition/html/VMSpecTOC.doc.html"> Java |
| * Virtual Machine Specification</a>. |
| */ |
| public class Bytecodes { |
| |
| // @formatter:off |
| public static final int NOP = 0; // 0x00 |
| public static final int ACONST_NULL = 1; // 0x01 |
| public static final int ICONST_M1 = 2; // 0x02 |
| public static final int ICONST_0 = 3; // 0x03 |
| public static final int ICONST_1 = 4; // 0x04 |
| public static final int ICONST_2 = 5; // 0x05 |
| public static final int ICONST_3 = 6; // 0x06 |
| public static final int ICONST_4 = 7; // 0x07 |
| public static final int ICONST_5 = 8; // 0x08 |
| public static final int LCONST_0 = 9; // 0x09 |
| public static final int LCONST_1 = 10; // 0x0A |
| public static final int FCONST_0 = 11; // 0x0B |
| public static final int FCONST_1 = 12; // 0x0C |
| public static final int FCONST_2 = 13; // 0x0D |
| public static final int DCONST_0 = 14; // 0x0E |
| public static final int DCONST_1 = 15; // 0x0F |
| public static final int BIPUSH = 16; // 0x10 |
| public static final int SIPUSH = 17; // 0x11 |
| public static final int LDC = 18; // 0x12 |
| public static final int LDC_W = 19; // 0x13 |
| public static final int LDC2_W = 20; // 0x14 |
| public static final int ILOAD = 21; // 0x15 |
| public static final int LLOAD = 22; // 0x16 |
| public static final int FLOAD = 23; // 0x17 |
| public static final int DLOAD = 24; // 0x18 |
| public static final int ALOAD = 25; // 0x19 |
| public static final int ILOAD_0 = 26; // 0x1A |
| public static final int ILOAD_1 = 27; // 0x1B |
| public static final int ILOAD_2 = 28; // 0x1C |
| public static final int ILOAD_3 = 29; // 0x1D |
| public static final int LLOAD_0 = 30; // 0x1E |
| public static final int LLOAD_1 = 31; // 0x1F |
| public static final int LLOAD_2 = 32; // 0x20 |
| public static final int LLOAD_3 = 33; // 0x21 |
| public static final int FLOAD_0 = 34; // 0x22 |
| public static final int FLOAD_1 = 35; // 0x23 |
| public static final int FLOAD_2 = 36; // 0x24 |
| public static final int FLOAD_3 = 37; // 0x25 |
| public static final int DLOAD_0 = 38; // 0x26 |
| public static final int DLOAD_1 = 39; // 0x27 |
| public static final int DLOAD_2 = 40; // 0x28 |
| public static final int DLOAD_3 = 41; // 0x29 |
| public static final int ALOAD_0 = 42; // 0x2A |
| public static final int ALOAD_1 = 43; // 0x2B |
| public static final int ALOAD_2 = 44; // 0x2C |
| public static final int ALOAD_3 = 45; // 0x2D |
| public static final int IALOAD = 46; // 0x2E |
| public static final int LALOAD = 47; // 0x2F |
| public static final int FALOAD = 48; // 0x30 |
| public static final int DALOAD = 49; // 0x31 |
| public static final int AALOAD = 50; // 0x32 |
| public static final int BALOAD = 51; // 0x33 |
| public static final int CALOAD = 52; // 0x34 |
| public static final int SALOAD = 53; // 0x35 |
| public static final int ISTORE = 54; // 0x36 |
| public static final int LSTORE = 55; // 0x37 |
| public static final int FSTORE = 56; // 0x38 |
| public static final int DSTORE = 57; // 0x39 |
| public static final int ASTORE = 58; // 0x3A |
| public static final int ISTORE_0 = 59; // 0x3B |
| public static final int ISTORE_1 = 60; // 0x3C |
| public static final int ISTORE_2 = 61; // 0x3D |
| public static final int ISTORE_3 = 62; // 0x3E |
| public static final int LSTORE_0 = 63; // 0x3F |
| public static final int LSTORE_1 = 64; // 0x40 |
| public static final int LSTORE_2 = 65; // 0x41 |
| public static final int LSTORE_3 = 66; // 0x42 |
| public static final int FSTORE_0 = 67; // 0x43 |
| public static final int FSTORE_1 = 68; // 0x44 |
| public static final int FSTORE_2 = 69; // 0x45 |
| public static final int FSTORE_3 = 70; // 0x46 |
| public static final int DSTORE_0 = 71; // 0x47 |
| public static final int DSTORE_1 = 72; // 0x48 |
| public static final int DSTORE_2 = 73; // 0x49 |
| public static final int DSTORE_3 = 74; // 0x4A |
| public static final int ASTORE_0 = 75; // 0x4B |
| public static final int ASTORE_1 = 76; // 0x4C |
| public static final int ASTORE_2 = 77; // 0x4D |
| public static final int ASTORE_3 = 78; // 0x4E |
| public static final int IASTORE = 79; // 0x4F |
| public static final int LASTORE = 80; // 0x50 |
| public static final int FASTORE = 81; // 0x51 |
| public static final int DASTORE = 82; // 0x52 |
| public static final int AASTORE = 83; // 0x53 |
| public static final int BASTORE = 84; // 0x54 |
| public static final int CASTORE = 85; // 0x55 |
| public static final int SASTORE = 86; // 0x56 |
| public static final int POP = 87; // 0x57 |
| public static final int POP2 = 88; // 0x58 |
| public static final int DUP = 89; // 0x59 |
| public static final int DUP_X1 = 90; // 0x5A |
| public static final int DUP_X2 = 91; // 0x5B |
| public static final int DUP2 = 92; // 0x5C |
| public static final int DUP2_X1 = 93; // 0x5D |
| public static final int DUP2_X2 = 94; // 0x5E |
| public static final int SWAP = 95; // 0x5F |
| public static final int IADD = 96; // 0x60 |
| public static final int LADD = 97; // 0x61 |
| public static final int FADD = 98; // 0x62 |
| public static final int DADD = 99; // 0x63 |
| public static final int ISUB = 100; // 0x64 |
| public static final int LSUB = 101; // 0x65 |
| public static final int FSUB = 102; // 0x66 |
| public static final int DSUB = 103; // 0x67 |
| public static final int IMUL = 104; // 0x68 |
| public static final int LMUL = 105; // 0x69 |
| public static final int FMUL = 106; // 0x6A |
| public static final int DMUL = 107; // 0x6B |
| public static final int IDIV = 108; // 0x6C |
| public static final int LDIV = 109; // 0x6D |
| public static final int FDIV = 110; // 0x6E |
| public static final int DDIV = 111; // 0x6F |
| public static final int IREM = 112; // 0x70 |
| public static final int LREM = 113; // 0x71 |
| public static final int FREM = 114; // 0x72 |
| public static final int DREM = 115; // 0x73 |
| public static final int INEG = 116; // 0x74 |
| public static final int LNEG = 117; // 0x75 |
| public static final int FNEG = 118; // 0x76 |
| public static final int DNEG = 119; // 0x77 |
| public static final int ISHL = 120; // 0x78 |
| public static final int LSHL = 121; // 0x79 |
| public static final int ISHR = 122; // 0x7A |
| public static final int LSHR = 123; // 0x7B |
| public static final int IUSHR = 124; // 0x7C |
| public static final int LUSHR = 125; // 0x7D |
| public static final int IAND = 126; // 0x7E |
| public static final int LAND = 127; // 0x7F |
| public static final int IOR = 128; // 0x80 |
| public static final int LOR = 129; // 0x81 |
| public static final int IXOR = 130; // 0x82 |
| public static final int LXOR = 131; // 0x83 |
| public static final int IINC = 132; // 0x84 |
| public static final int I2L = 133; // 0x85 |
| public static final int I2F = 134; // 0x86 |
| public static final int I2D = 135; // 0x87 |
| public static final int L2I = 136; // 0x88 |
| public static final int L2F = 137; // 0x89 |
| public static final int L2D = 138; // 0x8A |
| public static final int F2I = 139; // 0x8B |
| public static final int F2L = 140; // 0x8C |
| public static final int F2D = 141; // 0x8D |
| public static final int D2I = 142; // 0x8E |
| public static final int D2L = 143; // 0x8F |
| public static final int D2F = 144; // 0x90 |
| public static final int I2B = 145; // 0x91 |
| public static final int I2C = 146; // 0x92 |
| public static final int I2S = 147; // 0x93 |
| public static final int LCMP = 148; // 0x94 |
| public static final int FCMPL = 149; // 0x95 |
| public static final int FCMPG = 150; // 0x96 |
| public static final int DCMPL = 151; // 0x97 |
| public static final int DCMPG = 152; // 0x98 |
| public static final int IFEQ = 153; // 0x99 |
| public static final int IFNE = 154; // 0x9A |
| public static final int IFLT = 155; // 0x9B |
| public static final int IFGE = 156; // 0x9C |
| public static final int IFGT = 157; // 0x9D |
| public static final int IFLE = 158; // 0x9E |
| public static final int IF_ICMPEQ = 159; // 0x9F |
| public static final int IF_ICMPNE = 160; // 0xA0 |
| public static final int IF_ICMPLT = 161; // 0xA1 |
| public static final int IF_ICMPGE = 162; // 0xA2 |
| public static final int IF_ICMPGT = 163; // 0xA3 |
| public static final int IF_ICMPLE = 164; // 0xA4 |
| public static final int IF_ACMPEQ = 165; // 0xA5 |
| public static final int IF_ACMPNE = 166; // 0xA6 |
| public static final int GOTO = 167; // 0xA7 |
| public static final int JSR = 168; // 0xA8 |
| public static final int RET = 169; // 0xA9 |
| public static final int TABLESWITCH = 170; // 0xAA |
| public static final int LOOKUPSWITCH = 171; // 0xAB |
| public static final int IRETURN = 172; // 0xAC |
| public static final int LRETURN = 173; // 0xAD |
| public static final int FRETURN = 174; // 0xAE |
| public static final int DRETURN = 175; // 0xAF |
| public static final int ARETURN = 176; // 0xB0 |
| public static final int RETURN = 177; // 0xB1 |
| public static final int GETSTATIC = 178; // 0xB2 |
| public static final int PUTSTATIC = 179; // 0xB3 |
| public static final int GETFIELD = 180; // 0xB4 |
| public static final int PUTFIELD = 181; // 0xB5 |
| public static final int INVOKEVIRTUAL = 182; // 0xB6 |
| public static final int INVOKESPECIAL = 183; // 0xB7 |
| public static final int INVOKESTATIC = 184; // 0xB8 |
| public static final int INVOKEINTERFACE = 185; // 0xB9 |
| public static final int INVOKEDYNAMIC = 186; // 0xBA |
| public static final int NEW = 187; // 0xBB |
| public static final int NEWARRAY = 188; // 0xBC |
| public static final int ANEWARRAY = 189; // 0xBD |
| public static final int ARRAYLENGTH = 190; // 0xBE |
| public static final int ATHROW = 191; // 0xBF |
| public static final int CHECKCAST = 192; // 0xC0 |
| public static final int INSTANCEOF = 193; // 0xC1 |
| public static final int MONITORENTER = 194; // 0xC2 |
| public static final int MONITOREXIT = 195; // 0xC3 |
| public static final int WIDE = 196; // 0xC4 |
| public static final int MULTIANEWARRAY = 197; // 0xC5 |
| public static final int IFNULL = 198; // 0xC6 |
| public static final int IFNONNULL = 199; // 0xC7 |
| public static final int GOTO_W = 200; // 0xC8 |
| public static final int JSR_W = 201; // 0xC9 |
| public static final int BREAKPOINT = 202; // 0xCA |
| |
| public static final int ILLEGAL = 255; |
| public static final int END = 256; |
| // @formatter:on |
| |
| /** |
| * The last opcode defined by the JVM specification. To iterate over all JVM bytecodes: |
| * |
| * <pre> |
| * for (int opcode = 0; opcode <= Bytecodes.LAST_JVM_OPCODE; ++opcode) { |
| * // |
| * } |
| * </pre> |
| */ |
| public static final int LAST_JVM_OPCODE = JSR_W; |
| |
| /** |
| * A collection of flags describing various bytecode attributes. |
| */ |
| static class Flags { |
| |
| /** |
| * Denotes an instruction that ends a basic block and does not let control flow fall through |
| * to its lexical successor. |
| */ |
| static final int STOP = 0x00000001; |
| |
| /** |
| * Denotes an instruction that ends a basic block and may let control flow fall through to |
| * its lexical successor. In practice this means it is a conditional branch. |
| */ |
| static final int FALL_THROUGH = 0x00000002; |
| |
| /** |
| * Denotes an instruction that has a 2 or 4 byte operand that is an offset to another |
| * instruction in the same method. This does not include the {@link Bytecodes#TABLESWITCH} |
| * or {@link Bytecodes#LOOKUPSWITCH} instructions. |
| */ |
| static final int BRANCH = 0x00000004; |
| |
| /** |
| * Denotes an instruction that reads the value of a static or instance field. |
| */ |
| static final int FIELD_READ = 0x00000008; |
| |
| /** |
| * Denotes an instruction that writes the value of a static or instance field. |
| */ |
| static final int FIELD_WRITE = 0x00000010; |
| |
| /** |
| * Denotes an instruction that can cause a trap. |
| */ |
| static final int TRAP = 0x00000080; |
| /** |
| * Denotes an instruction that is commutative. |
| */ |
| static final int COMMUTATIVE = 0x00000100; |
| /** |
| * Denotes an instruction that is associative. |
| */ |
| static final int ASSOCIATIVE = 0x00000200; |
| /** |
| * Denotes an instruction that loads an operand. |
| */ |
| static final int LOAD = 0x00000400; |
| /** |
| * Denotes an instruction that stores an operand. |
| */ |
| static final int STORE = 0x00000800; |
| /** |
| * Denotes the 4 INVOKE* instructions. |
| */ |
| static final int INVOKE = 0x00001000; |
| } |
| |
| // Performs a sanity check that none of the flags overlap. |
| static { |
| int allFlags = 0; |
| try { |
| for (Field field : Flags.class.getDeclaredFields()) { |
| int flagsFilter = Modifier.FINAL | Modifier.STATIC; |
| if ((field.getModifiers() & flagsFilter) == flagsFilter && !field.isSynthetic()) { |
| assert field.getType() == int.class : "Field is not int : " + field; |
| final int flag = field.getInt(null); |
| assert flag != 0; |
| assert (flag & allFlags) == 0 : field.getName() + " has a value conflicting with another flag"; |
| allFlags |= flag; |
| } |
| } |
| } catch (Exception e) { |
| throw new InternalError(e.toString()); |
| } |
| } |
| |
| /** |
| * An array that maps from a bytecode value to a {@link String} for the corresponding |
| * instruction mnemonic. |
| */ |
| private static final String[] nameArray = new String[256]; |
| |
| /** |
| * An array that maps from a bytecode value to the set of {@link Flags} for the corresponding |
| * instruction. |
| */ |
| private static final int[] flagsArray = new int[256]; |
| |
| /** |
| * An array that maps from a bytecode value to the length in bytes for the corresponding |
| * instruction. |
| */ |
| private static final int[] lengthArray = new int[256]; |
| |
| /** |
| * An array that maps from a bytecode value to the number of slots pushed on the stack by the |
| * corresponding instruction. |
| */ |
| private static final int[] stackEffectArray = new int[256]; |
| |
| // Checkstyle: stop |
| // @formatter:off |
| static { |
| def(NOP , "nop" , "b" , 0); |
| def(ACONST_NULL , "aconst_null" , "b" , 1); |
| def(ICONST_M1 , "iconst_m1" , "b" , 1); |
| def(ICONST_0 , "iconst_0" , "b" , 1); |
| def(ICONST_1 , "iconst_1" , "b" , 1); |
| def(ICONST_2 , "iconst_2" , "b" , 1); |
| def(ICONST_3 , "iconst_3" , "b" , 1); |
| def(ICONST_4 , "iconst_4" , "b" , 1); |
| def(ICONST_5 , "iconst_5" , "b" , 1); |
| def(LCONST_0 , "lconst_0" , "b" , 2); |
| def(LCONST_1 , "lconst_1" , "b" , 2); |
| def(FCONST_0 , "fconst_0" , "b" , 1); |
| def(FCONST_1 , "fconst_1" , "b" , 1); |
| def(FCONST_2 , "fconst_2" , "b" , 1); |
| def(DCONST_0 , "dconst_0" , "b" , 2); |
| def(DCONST_1 , "dconst_1" , "b" , 2); |
| def(BIPUSH , "bipush" , "bc" , 1); |
| def(SIPUSH , "sipush" , "bcc" , 1); |
| def(LDC , "ldc" , "bi" , 1, TRAP); |
| def(LDC_W , "ldc_w" , "bii" , 1, TRAP); |
| def(LDC2_W , "ldc2_w" , "bii" , 2, TRAP); |
| def(ILOAD , "iload" , "bi" , 1, LOAD); |
| def(LLOAD , "lload" , "bi" , 2, LOAD); |
| def(FLOAD , "fload" , "bi" , 1, LOAD); |
| def(DLOAD , "dload" , "bi" , 2, LOAD); |
| def(ALOAD , "aload" , "bi" , 1, LOAD); |
| def(ILOAD_0 , "iload_0" , "b" , 1, LOAD); |
| def(ILOAD_1 , "iload_1" , "b" , 1, LOAD); |
| def(ILOAD_2 , "iload_2" , "b" , 1, LOAD); |
| def(ILOAD_3 , "iload_3" , "b" , 1, LOAD); |
| def(LLOAD_0 , "lload_0" , "b" , 2, LOAD); |
| def(LLOAD_1 , "lload_1" , "b" , 2, LOAD); |
| def(LLOAD_2 , "lload_2" , "b" , 2, LOAD); |
| def(LLOAD_3 , "lload_3" , "b" , 2, LOAD); |
| def(FLOAD_0 , "fload_0" , "b" , 1, LOAD); |
| def(FLOAD_1 , "fload_1" , "b" , 1, LOAD); |
| def(FLOAD_2 , "fload_2" , "b" , 1, LOAD); |
| def(FLOAD_3 , "fload_3" , "b" , 1, LOAD); |
| def(DLOAD_0 , "dload_0" , "b" , 2, LOAD); |
| def(DLOAD_1 , "dload_1" , "b" , 2, LOAD); |
| def(DLOAD_2 , "dload_2" , "b" , 2, LOAD); |
| def(DLOAD_3 , "dload_3" , "b" , 2, LOAD); |
| def(ALOAD_0 , "aload_0" , "b" , 1, LOAD); |
| def(ALOAD_1 , "aload_1" , "b" , 1, LOAD); |
| def(ALOAD_2 , "aload_2" , "b" , 1, LOAD); |
| def(ALOAD_3 , "aload_3" , "b" , 1, LOAD); |
| def(IALOAD , "iaload" , "b" , -1, TRAP); |
| def(LALOAD , "laload" , "b" , 0, TRAP); |
| def(FALOAD , "faload" , "b" , -1, TRAP); |
| def(DALOAD , "daload" , "b" , 0, TRAP); |
| def(AALOAD , "aaload" , "b" , -1, TRAP); |
| def(BALOAD , "baload" , "b" , -1, TRAP); |
| def(CALOAD , "caload" , "b" , -1, TRAP); |
| def(SALOAD , "saload" , "b" , -1, TRAP); |
| def(ISTORE , "istore" , "bi" , -1, STORE); |
| def(LSTORE , "lstore" , "bi" , -2, STORE); |
| def(FSTORE , "fstore" , "bi" , -1, STORE); |
| def(DSTORE , "dstore" , "bi" , -2, STORE); |
| def(ASTORE , "astore" , "bi" , -1, STORE); |
| def(ISTORE_0 , "istore_0" , "b" , -1, STORE); |
| def(ISTORE_1 , "istore_1" , "b" , -1, STORE); |
| def(ISTORE_2 , "istore_2" , "b" , -1, STORE); |
| def(ISTORE_3 , "istore_3" , "b" , -1, STORE); |
| def(LSTORE_0 , "lstore_0" , "b" , -2, STORE); |
| def(LSTORE_1 , "lstore_1" , "b" , -2, STORE); |
| def(LSTORE_2 , "lstore_2" , "b" , -2, STORE); |
| def(LSTORE_3 , "lstore_3" , "b" , -2, STORE); |
| def(FSTORE_0 , "fstore_0" , "b" , -1, STORE); |
| def(FSTORE_1 , "fstore_1" , "b" , -1, STORE); |
| def(FSTORE_2 , "fstore_2" , "b" , -1, STORE); |
| def(FSTORE_3 , "fstore_3" , "b" , -1, STORE); |
| def(DSTORE_0 , "dstore_0" , "b" , -2, STORE); |
| def(DSTORE_1 , "dstore_1" , "b" , -2, STORE); |
| def(DSTORE_2 , "dstore_2" , "b" , -2, STORE); |
| def(DSTORE_3 , "dstore_3" , "b" , -2, STORE); |
| def(ASTORE_0 , "astore_0" , "b" , -1, STORE); |
| def(ASTORE_1 , "astore_1" , "b" , -1, STORE); |
| def(ASTORE_2 , "astore_2" , "b" , -1, STORE); |
| def(ASTORE_3 , "astore_3" , "b" , -1, STORE); |
| def(IASTORE , "iastore" , "b" , -3, TRAP); |
| def(LASTORE , "lastore" , "b" , -4, TRAP); |
| def(FASTORE , "fastore" , "b" , -3, TRAP); |
| def(DASTORE , "dastore" , "b" , -4, TRAP); |
| def(AASTORE , "aastore" , "b" , -3, TRAP); |
| def(BASTORE , "bastore" , "b" , -3, TRAP); |
| def(CASTORE , "castore" , "b" , -3, TRAP); |
| def(SASTORE , "sastore" , "b" , -3, TRAP); |
| def(POP , "pop" , "b" , -1); |
| def(POP2 , "pop2" , "b" , -2); |
| def(DUP , "dup" , "b" , 1); |
| def(DUP_X1 , "dup_x1" , "b" , 1); |
| def(DUP_X2 , "dup_x2" , "b" , 1); |
| def(DUP2 , "dup2" , "b" , 2); |
| def(DUP2_X1 , "dup2_x1" , "b" , 2); |
| def(DUP2_X2 , "dup2_x2" , "b" , 2); |
| def(SWAP , "swap" , "b" , 0); |
| def(IADD , "iadd" , "b" , -1, COMMUTATIVE | ASSOCIATIVE); |
| def(LADD , "ladd" , "b" , -2, COMMUTATIVE | ASSOCIATIVE); |
| def(FADD , "fadd" , "b" , -1, COMMUTATIVE | ASSOCIATIVE); |
| def(DADD , "dadd" , "b" , -2, COMMUTATIVE | ASSOCIATIVE); |
| def(ISUB , "isub" , "b" , -1); |
| def(LSUB , "lsub" , "b" , -2); |
| def(FSUB , "fsub" , "b" , -1); |
| def(DSUB , "dsub" , "b" , -2); |
| def(IMUL , "imul" , "b" , -1, COMMUTATIVE | ASSOCIATIVE); |
| def(LMUL , "lmul" , "b" , -2, COMMUTATIVE | ASSOCIATIVE); |
| def(FMUL , "fmul" , "b" , -1, COMMUTATIVE | ASSOCIATIVE); |
| def(DMUL , "dmul" , "b" , -2, COMMUTATIVE | ASSOCIATIVE); |
| def(IDIV , "idiv" , "b" , -1, TRAP); |
| def(LDIV , "ldiv" , "b" , -2, TRAP); |
| def(FDIV , "fdiv" , "b" , -1); |
| def(DDIV , "ddiv" , "b" , -2); |
| def(IREM , "irem" , "b" , -1, TRAP); |
| def(LREM , "lrem" , "b" , -2, TRAP); |
| def(FREM , "frem" , "b" , -1); |
| def(DREM , "drem" , "b" , -2); |
| def(INEG , "ineg" , "b" , 0); |
| def(LNEG , "lneg" , "b" , 0); |
| def(FNEG , "fneg" , "b" , 0); |
| def(DNEG , "dneg" , "b" , 0); |
| def(ISHL , "ishl" , "b" , -1); |
| def(LSHL , "lshl" , "b" , -1); |
| def(ISHR , "ishr" , "b" , -1); |
| def(LSHR , "lshr" , "b" , -1); |
| def(IUSHR , "iushr" , "b" , -1); |
| def(LUSHR , "lushr" , "b" , -1); |
| def(IAND , "iand" , "b" , -1, COMMUTATIVE | ASSOCIATIVE); |
| def(LAND , "land" , "b" , -2, COMMUTATIVE | ASSOCIATIVE); |
| def(IOR , "ior" , "b" , -1, COMMUTATIVE | ASSOCIATIVE); |
| def(LOR , "lor" , "b" , -2, COMMUTATIVE | ASSOCIATIVE); |
| def(IXOR , "ixor" , "b" , -1, COMMUTATIVE | ASSOCIATIVE); |
| def(LXOR , "lxor" , "b" , -2, COMMUTATIVE | ASSOCIATIVE); |
| def(IINC , "iinc" , "bic" , 0, LOAD | STORE); |
| def(I2L , "i2l" , "b" , 1); |
| def(I2F , "i2f" , "b" , 0); |
| def(I2D , "i2d" , "b" , 1); |
| def(L2I , "l2i" , "b" , -1); |
| def(L2F , "l2f" , "b" , -1); |
| def(L2D , "l2d" , "b" , 0); |
| def(F2I , "f2i" , "b" , 0); |
| def(F2L , "f2l" , "b" , 1); |
| def(F2D , "f2d" , "b" , 1); |
| def(D2I , "d2i" , "b" , -1); |
| def(D2L , "d2l" , "b" , 0); |
| def(D2F , "d2f" , "b" , -1); |
| def(I2B , "i2b" , "b" , 0); |
| def(I2C , "i2c" , "b" , 0); |
| def(I2S , "i2s" , "b" , 0); |
| def(LCMP , "lcmp" , "b" , -3); |
| def(FCMPL , "fcmpl" , "b" , -1); |
| def(FCMPG , "fcmpg" , "b" , -1); |
| def(DCMPL , "dcmpl" , "b" , -3); |
| def(DCMPG , "dcmpg" , "b" , -3); |
| def(IFEQ , "ifeq" , "boo" , -1, FALL_THROUGH | BRANCH); |
| def(IFNE , "ifne" , "boo" , -1, FALL_THROUGH | BRANCH); |
| def(IFLT , "iflt" , "boo" , -1, FALL_THROUGH | BRANCH); |
| def(IFGE , "ifge" , "boo" , -1, FALL_THROUGH | BRANCH); |
| def(IFGT , "ifgt" , "boo" , -1, FALL_THROUGH | BRANCH); |
| def(IFLE , "ifle" , "boo" , -1, FALL_THROUGH | BRANCH); |
| def(IF_ICMPEQ , "if_icmpeq" , "boo" , -2, COMMUTATIVE | FALL_THROUGH | BRANCH); |
| def(IF_ICMPNE , "if_icmpne" , "boo" , -2, COMMUTATIVE | FALL_THROUGH | BRANCH); |
| def(IF_ICMPLT , "if_icmplt" , "boo" , -2, FALL_THROUGH | BRANCH); |
| def(IF_ICMPGE , "if_icmpge" , "boo" , -2, FALL_THROUGH | BRANCH); |
| def(IF_ICMPGT , "if_icmpgt" , "boo" , -2, FALL_THROUGH | BRANCH); |
| def(IF_ICMPLE , "if_icmple" , "boo" , -2, FALL_THROUGH | BRANCH); |
| def(IF_ACMPEQ , "if_acmpeq" , "boo" , -2, COMMUTATIVE | FALL_THROUGH | BRANCH); |
| def(IF_ACMPNE , "if_acmpne" , "boo" , -2, COMMUTATIVE | FALL_THROUGH | BRANCH); |
| def(GOTO , "goto" , "boo" , 0, STOP | BRANCH); |
| def(JSR , "jsr" , "boo" , 0, STOP | BRANCH); |
| def(RET , "ret" , "bi" , 0, STOP); |
| def(TABLESWITCH , "tableswitch" , "" , -1, STOP); |
| def(LOOKUPSWITCH , "lookupswitch" , "" , -1, STOP); |
| def(IRETURN , "ireturn" , "b" , -1, TRAP | STOP); |
| def(LRETURN , "lreturn" , "b" , -2, TRAP | STOP); |
| def(FRETURN , "freturn" , "b" , -1, TRAP | STOP); |
| def(DRETURN , "dreturn" , "b" , -2, TRAP | STOP); |
| def(ARETURN , "areturn" , "b" , -1, TRAP | STOP); |
| def(RETURN , "return" , "b" , 0, TRAP | STOP); |
| def(GETSTATIC , "getstatic" , "bjj" , 1, TRAP | FIELD_READ); |
| def(PUTSTATIC , "putstatic" , "bjj" , -1, TRAP | FIELD_WRITE); |
| def(GETFIELD , "getfield" , "bjj" , 0, TRAP | FIELD_READ); |
| def(PUTFIELD , "putfield" , "bjj" , -2, TRAP | FIELD_WRITE); |
| def(INVOKEVIRTUAL , "invokevirtual" , "bjj" , -1, TRAP | INVOKE); |
| def(INVOKESPECIAL , "invokespecial" , "bjj" , -1, TRAP | INVOKE); |
| def(INVOKESTATIC , "invokestatic" , "bjj" , 0, TRAP | INVOKE); |
| def(INVOKEINTERFACE , "invokeinterface" , "bjja_", -1, TRAP | INVOKE); |
| def(INVOKEDYNAMIC , "invokedynamic" , "bjjjj", 0, TRAP | INVOKE); |
| def(NEW , "new" , "bii" , 1, TRAP); |
| def(NEWARRAY , "newarray" , "bc" , 0, TRAP); |
| def(ANEWARRAY , "anewarray" , "bii" , 0, TRAP); |
| def(ARRAYLENGTH , "arraylength" , "b" , 0, TRAP); |
| def(ATHROW , "athrow" , "b" , -1, TRAP | STOP); |
| def(CHECKCAST , "checkcast" , "bii" , 0, TRAP); |
| def(INSTANCEOF , "instanceof" , "bii" , 0, TRAP); |
| def(MONITORENTER , "monitorenter" , "b" , -1, TRAP); |
| def(MONITOREXIT , "monitorexit" , "b" , -1, TRAP); |
| def(WIDE , "wide" , "" , 0); |
| def(MULTIANEWARRAY , "multianewarray" , "biic" , 1, TRAP); |
| def(IFNULL , "ifnull" , "boo" , -1, FALL_THROUGH | BRANCH); |
| def(IFNONNULL , "ifnonnull" , "boo" , -1, FALL_THROUGH | BRANCH); |
| def(GOTO_W , "goto_w" , "boooo", 0, STOP | BRANCH); |
| def(JSR_W , "jsr_w" , "boooo", 0, STOP | BRANCH); |
| def(BREAKPOINT , "breakpoint" , "b" , 0, TRAP); |
| } |
| // @formatter:on |
| // Checkstyle: resume |
| |
| /** |
| * Determines if an opcode is commutative. |
| * |
| * @param opcode the opcode to check |
| * @return {@code true} iff commutative |
| */ |
| public static boolean isCommutative(int opcode) { |
| return (flagsArray[opcode & 0xff] & COMMUTATIVE) != 0; |
| } |
| |
| /** |
| * Gets the length of an instruction denoted by a given opcode. |
| * |
| * @param opcode an instruction opcode |
| * @return the length of the instruction denoted by {@code opcode}. If {@code opcode} is an |
| * illegal instruction or denotes a variable length instruction (e.g. |
| * {@link #TABLESWITCH}), then 0 is returned. |
| */ |
| public static int lengthOf(int opcode) { |
| return lengthArray[opcode & 0xff]; |
| } |
| |
| /** |
| * Gets the effect on the depth of the expression stack of an instruction denoted by a given |
| * opcode. |
| * |
| * @param opcode an instruction opcode |
| * @return the change in the stack caused by the instruction denoted by {@code opcode}. If |
| * {@code opcode} is an illegal instruction then 0 is returned. Note that invoke |
| * instructions may pop more arguments so this value is a minimum stack effect. |
| */ |
| public static int stackEffectOf(int opcode) { |
| return stackEffectArray[opcode & 0xff]; |
| } |
| |
| /** |
| * Gets the lower-case mnemonic for a given opcode. |
| * |
| * @param opcode an opcode |
| * @return the mnemonic for {@code opcode} or {@code "<illegal opcode: " + opcode + ">"} if |
| * {@code opcode} is not a legal opcode |
| */ |
| public static String nameOf(int opcode) throws IllegalArgumentException { |
| String name = nameArray[opcode & 0xff]; |
| if (name == null) { |
| return "<illegal opcode: " + opcode + ">"; |
| } |
| return name; |
| } |
| |
| /** |
| * Allocation-free version of {@linkplain #nameOf(int)}. |
| * |
| * @param opcode an opcode. |
| * @return the mnemonic for {@code opcode} or {@code "<illegal opcode>"} if {@code opcode} is |
| * not a legal opcode. |
| */ |
| public static String baseNameOf(int opcode) { |
| String name = nameArray[opcode & 0xff]; |
| if (name == null) { |
| return "<illegal opcode>"; |
| } |
| return name; |
| } |
| |
| /** |
| * Gets the opcode corresponding to a given mnemonic. |
| * |
| * @param name an opcode mnemonic |
| * @return the opcode corresponding to {@code mnemonic} |
| * @throws IllegalArgumentException if {@code name} does not denote a valid opcode |
| */ |
| public static int valueOf(String name) { |
| for (int opcode = 0; opcode < nameArray.length; ++opcode) { |
| if (name.equalsIgnoreCase(nameArray[opcode])) { |
| return opcode; |
| } |
| } |
| throw new IllegalArgumentException("No opcode for " + name); |
| } |
| |
| /** |
| * Determines if a given opcode denotes an instruction that can cause an implicit exception. |
| * |
| * @param opcode an opcode to test |
| * @return {@code true} iff {@code opcode} can cause an implicit exception, {@code false} |
| * otherwise |
| */ |
| public static boolean canTrap(int opcode) { |
| return (flagsArray[opcode & 0xff] & TRAP) != 0; |
| } |
| |
| /** |
| * Determines if a given opcode denotes an instruction that loads a local variable to the |
| * operand stack. |
| * |
| * @param opcode an opcode to test |
| * @return {@code true} iff {@code opcode} loads a local variable to the operand stack, |
| * {@code false} otherwise |
| */ |
| public static boolean isLoad(int opcode) { |
| return (flagsArray[opcode & 0xff] & LOAD) != 0; |
| } |
| |
| /** |
| * Determines if a given opcode denotes an instruction that ends a basic block and does not let |
| * control flow fall through to its lexical successor. |
| * |
| * @param opcode an opcode to test |
| * @return {@code true} iff {@code opcode} properly ends a basic block |
| */ |
| public static boolean isStop(int opcode) { |
| return (flagsArray[opcode & 0xff] & STOP) != 0; |
| } |
| |
| /** |
| * Determines if a given opcode denotes an instruction that stores a value to a local variable |
| * after popping it from the operand stack. |
| * |
| * @param opcode an opcode to test |
| * @return {@code true} iff {@code opcode} stores a value to a local variable, {@code false} |
| * otherwise |
| */ |
| public static boolean isInvoke(int opcode) { |
| return (flagsArray[opcode & 0xff] & INVOKE) != 0; |
| } |
| |
| /** |
| * Determines if a given opcode denotes an instruction that stores a value to a local variable |
| * after popping it from the operand stack. |
| * |
| * @param opcode an opcode to test |
| * @return {@code true} iff {@code opcode} stores a value to a local variable, {@code false} |
| * otherwise |
| */ |
| public static boolean isStore(int opcode) { |
| return (flagsArray[opcode & 0xff] & STORE) != 0; |
| } |
| |
| /** |
| * Determines if a given opcode is an instruction that delimits a basic block. |
| * |
| * @param opcode an opcode to test |
| * @return {@code true} iff {@code opcode} delimits a basic block |
| */ |
| public static boolean isBlockEnd(int opcode) { |
| return (flagsArray[opcode & 0xff] & (STOP | FALL_THROUGH)) != 0; |
| } |
| |
| /** |
| * Determines if a given opcode is an instruction that has a 2 or 4 byte operand that is an |
| * offset to another instruction in the same method. This does not include the |
| * {@linkplain #TABLESWITCH switch} instructions. |
| * |
| * @param opcode an opcode to test |
| * @return {@code true} iff {@code opcode} is a branch instruction with a single operand |
| */ |
| public static boolean isBranch(int opcode) { |
| return (flagsArray[opcode & 0xff] & BRANCH) != 0; |
| } |
| |
| /** |
| * Determines if a given opcode denotes a conditional branch. |
| * |
| * @param opcode |
| * @return {@code true} iff {@code opcode} is a conditional branch |
| */ |
| public static boolean isConditionalBranch(int opcode) { |
| return (flagsArray[opcode & 0xff] & FALL_THROUGH) != 0; |
| } |
| |
| /** |
| * Gets the arithmetic operator name for a given opcode. If {@code opcode} does not denote an |
| * arithmetic instruction, then the {@linkplain #nameOf(int) name} of the opcode is returned |
| * instead. |
| * |
| * @param op an opcode |
| * @return the arithmetic operator name |
| */ |
| public static String operator(int op) { |
| // Checkstyle: stop |
| switch (op) { |
| // arithmetic ops |
| case IADD: // fall through |
| case LADD: // fall through |
| case FADD: // fall through |
| case DADD: |
| return "+"; |
| case ISUB: // fall through |
| case LSUB: // fall through |
| case FSUB: // fall through |
| case DSUB: |
| return "-"; |
| case IMUL: // fall through |
| case LMUL: // fall through |
| case FMUL: // fall through |
| case DMUL: |
| return "*"; |
| case IDIV: // fall through |
| case LDIV: // fall through |
| case FDIV: // fall through |
| case DDIV: |
| return "/"; |
| case IREM: // fall through |
| case LREM: // fall through |
| case FREM: // fall through |
| case DREM: |
| return "%"; |
| // shift ops |
| case ISHL: // fall through |
| case LSHL: |
| return "<<"; |
| case ISHR: // fall through |
| case LSHR: |
| return ">>"; |
| case IUSHR: // fall through |
| case LUSHR: |
| return ">>>"; |
| // logic ops |
| case IAND: // fall through |
| case LAND: |
| return "&"; |
| case IOR: // fall through |
| case LOR: |
| return "|"; |
| case IXOR: // fall through |
| case LXOR: |
| return "^"; |
| } |
| // Checkstyle: resume |
| return nameOf(op); |
| } |
| |
| /** |
| * Defines a bytecode by entering it into the arrays that record its name, length and flags. |
| * |
| * @param name instruction name (should be lower case) |
| * @param format encodes the length of the instruction |
| */ |
| private static void def(int opcode, String name, String format, int stackEffect) { |
| def(opcode, name, format, stackEffect, 0); |
| } |
| |
| /** |
| * Defines a bytecode by entering it into the arrays that record its name, length and flags. |
| * |
| * @param name instruction name (lower case) |
| * @param format encodes the length of the instruction |
| * @param flags the set of {@link Flags} associated with the instruction |
| */ |
| private static void def(int opcode, String name, String format, int stackEffect, int flags) { |
| assert nameArray[opcode] == null : "opcode " + opcode + " is already bound to name " + nameArray[opcode]; |
| nameArray[opcode] = name; |
| int instructionLength = format.length(); |
| lengthArray[opcode] = instructionLength; |
| stackEffectArray[opcode] = stackEffect; |
| Bytecodes.flagsArray[opcode] = flags; |
| |
| assert !isConditionalBranch(opcode) || isBranch(opcode) : "a conditional branch must also be a branch"; |
| } |
| } |
