Bytecodes (Graal OpenJDK Project Documentation)

java.lang.Object
- com.oracle.graal.bytecode.Bytecodes

```
public class Bytecodes
extends Object
```
Definitions of the standard Java bytecodes defined by Java Virtual Machine Specification.

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

(package private) static class Bytecodes.Flags
A collection of flags describing various bytecode attributes.

Nested Classes
Modifier and Type	Class and Description
`(package private) static class`	`Bytecodes.Flags` A collection of flags describing various bytecode attributes.

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`AALOAD`
`static int`	`AASTORE`
`static int`	`ACONST_NULL`
`static int`	`ALOAD`
`static int`	`ALOAD_0`
`static int`	`ALOAD_1`
`static int`	`ALOAD_2`
`static int`	`ALOAD_3`
`static int`	`ANEWARRAY`
`static int`	`ARETURN`
`static int`	`ARRAYLENGTH`
`static int`	`ASTORE`
`static int`	`ASTORE_0`
`static int`	`ASTORE_1`
`static int`	`ASTORE_2`
`static int`	`ASTORE_3`
`static int`	`ATHROW`
`static int`	`BALOAD`
`static int`	`BASTORE`
`static int`	`BIPUSH`
`static int`	`BREAKPOINT`
`static int`	`CALOAD`
`static int`	`CASTORE`
`static int`	`CHECKCAST`
`static int`	`D2F`
`static int`	`D2I`
`static int`	`D2L`
`static int`	`DADD`
`static int`	`DALOAD`
`static int`	`DASTORE`
`static int`	`DCMPG`
`static int`	`DCMPL`
`static int`	`DCONST_0`
`static int`	`DCONST_1`
`static int`	`DDIV`
`static int`	`DLOAD`
`static int`	`DLOAD_0`
`static int`	`DLOAD_1`
`static int`	`DLOAD_2`
`static int`	`DLOAD_3`
`static int`	`DMUL`
`static int`	`DNEG`
`static int`	`DREM`
`static int`	`DRETURN`
`static int`	`DSTORE`
`static int`	`DSTORE_0`
`static int`	`DSTORE_1`
`static int`	`DSTORE_2`
`static int`	`DSTORE_3`
`static int`	`DSUB`
`static int`	`DUP`
`static int`	`DUP_X1`
`static int`	`DUP_X2`
`static int`	`DUP2`
`static int`	`DUP2_X1`
`static int`	`DUP2_X2`
`static int`	`END`
`static int`	`F2D`
`static int`	`F2I`
`static int`	`F2L`
`static int`	`FADD`
`static int`	`FALOAD`
`static int`	`FASTORE`
`static int`	`FCMPG`
`static int`	`FCMPL`
`static int`	`FCONST_0`
`static int`	`FCONST_1`
`static int`	`FCONST_2`
`static int`	`FDIV`
`private static int[]`	`flagsArray` An array that maps from a bytecode value to the set of `Bytecodes.Flags` for the corresponding instruction.
`static int`	`FLOAD`
`static int`	`FLOAD_0`
`static int`	`FLOAD_1`
`static int`	`FLOAD_2`
`static int`	`FLOAD_3`
`static int`	`FMUL`
`static int`	`FNEG`
`static int`	`FREM`
`static int`	`FRETURN`
`static int`	`FSTORE`
`static int`	`FSTORE_0`
`static int`	`FSTORE_1`
`static int`	`FSTORE_2`
`static int`	`FSTORE_3`
`static int`	`FSUB`
`static int`	`GETFIELD`
`static int`	`GETSTATIC`
`static int`	`GOTO`
`static int`	`GOTO_W`
`static int`	`I2B`
`static int`	`I2C`
`static int`	`I2D`
`static int`	`I2F`
`static int`	`I2L`
`static int`	`I2S`
`static int`	`IADD`
`static int`	`IALOAD`
`static int`	`IAND`
`static int`	`IASTORE`
`static int`	`ICONST_0`
`static int`	`ICONST_1`
`static int`	`ICONST_2`
`static int`	`ICONST_3`
`static int`	`ICONST_4`
`static int`	`ICONST_5`
`static int`	`ICONST_M1`
`static int`	`IDIV`
`static int`	`IF_ACMPEQ`
`static int`	`IF_ACMPNE`
`static int`	`IF_ICMPEQ`
`static int`	`IF_ICMPGE`
`static int`	`IF_ICMPGT`
`static int`	`IF_ICMPLE`
`static int`	`IF_ICMPLT`
`static int`	`IF_ICMPNE`
`static int`	`IFEQ`
`static int`	`IFGE`
`static int`	`IFGT`
`static int`	`IFLE`
`static int`	`IFLT`
`static int`	`IFNE`
`static int`	`IFNONNULL`
`static int`	`IFNULL`
`static int`	`IINC`
`static int`	`ILLEGAL`
`static int`	`ILOAD`
`static int`	`ILOAD_0`
`static int`	`ILOAD_1`
`static int`	`ILOAD_2`
`static int`	`ILOAD_3`
`static int`	`IMUL`
`static int`	`INEG`
`static int`	`INSTANCEOF`
`static int`	`INVOKEDYNAMIC`
`static int`	`INVOKEINTERFACE`
`static int`	`INVOKESPECIAL`
`static int`	`INVOKESTATIC`
`static int`	`INVOKEVIRTUAL`
`static int`	`IOR`
`static int`	`IREM`
`static int`	`IRETURN`
`static int`	`ISHL`
`static int`	`ISHR`
`static int`	`ISTORE`
`static int`	`ISTORE_0`
`static int`	`ISTORE_1`
`static int`	`ISTORE_2`
`static int`	`ISTORE_3`
`static int`	`ISUB`
`static int`	`IUSHR`
`static int`	`IXOR`
`static int`	`JSR`
`static int`	`JSR_W`
`static int`	`L2D`
`static int`	`L2F`
`static int`	`L2I`
`static int`	`LADD`
`static int`	`LALOAD`
`static int`	`LAND`
`static int`	`LAST_JVM_OPCODE` The last opcode defined by the JVM specification.
`static int`	`LASTORE`
`static int`	`LCMP`
`static int`	`LCONST_0`
`static int`	`LCONST_1`
`static int`	`LDC`
`static int`	`LDC_W`
`static int`	`LDC2_W`
`static int`	`LDIV`
`private static int[]`	`lengthArray` An array that maps from a bytecode value to the length in bytes for the corresponding instruction.
`static int`	`LLOAD`
`static int`	`LLOAD_0`
`static int`	`LLOAD_1`
`static int`	`LLOAD_2`
`static int`	`LLOAD_3`
`static int`	`LMUL`
`static int`	`LNEG`
`static int`	`LOOKUPSWITCH`
`static int`	`LOR`
`static int`	`LREM`
`static int`	`LRETURN`
`static int`	`LSHL`
`static int`	`LSHR`
`static int`	`LSTORE`
`static int`	`LSTORE_0`
`static int`	`LSTORE_1`
`static int`	`LSTORE_2`
`static int`	`LSTORE_3`
`static int`	`LSUB`
`static int`	`LUSHR`
`static int`	`LXOR`
`static int`	`MONITORENTER`
`static int`	`MONITOREXIT`
`static int`	`MULTIANEWARRAY`
`private static String[]`	`nameArray` An array that maps from a bytecode value to a `String` for the corresponding instruction mnemonic.
`static int`	`NEW`
`static int`	`NEWARRAY`
`static int`	`NOP`
`static int`	`POP`
`static int`	`POP2`
`static int`	`PUTFIELD`
`static int`	`PUTSTATIC`
`static int`	`RET`
`static int`	`RETURN`
`static int`	`SALOAD`
`static int`	`SASTORE`
`static int`	`SIPUSH`
`private static int[]`	`stackEffectArray` An array that maps from a bytecode value to the number of slots pushed on the stack by the corresponding instruction.
`static int`	`SWAP`
`static int`	`TABLESWITCH`
`static int`	`WIDE`

Constructor Summary

Constructors
Constructor and Description

Bytecodes()

Constructors
Constructor and Description
`Bytecodes()`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static String`	`baseNameOf(int opcode)` Allocation-free version of nameOf(int).
`static boolean`	`canTrap(int opcode)` Determines if a given opcode denotes an instruction that can cause an implicit exception.
`private static void`	`def(int opcode, String name, String format, int stackEffect)` Defines a bytecode by entering it into the arrays that record its name, length and flags.
`private static void`	`def(int opcode, String name, String format, int stackEffect, int flags)` Defines a bytecode by entering it into the arrays that record its name, length and flags.
`static boolean`	`isBlockEnd(int opcode)` Determines if a given opcode is an instruction that delimits a basic block.
`static boolean`	`isBranch(int opcode)` 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.
`static boolean`	`isCommutative(int opcode)` Determines if an opcode is commutative.
`static boolean`	`isConditionalBranch(int opcode)` Determines if a given opcode denotes a conditional branch.
`static boolean`	`isInvoke(int opcode)` Determines if a given opcode denotes an instruction that stores a value to a local variable after popping it from the operand stack.
`static boolean`	`isLoad(int opcode)` Determines if a given opcode denotes an instruction that loads a local variable to the operand stack.
`static boolean`	`isStop(int opcode)` 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.
`static boolean`	`isStore(int opcode)` Determines if a given opcode denotes an instruction that stores a value to a local variable after popping it from the operand stack.
`static int`	`lengthOf(int opcode)` Gets the length of an instruction denoted by a given opcode.
`static String`	`nameOf(int opcode)` Gets the lower-case mnemonic for a given opcode.
`static String`	`operator(int op)` Gets the arithmetic operator name for a given opcode.
`static int`	`stackEffectOf(int opcode)` Gets the effect on the depth of the expression stack of an instruction denoted by a given opcode.
`static int`	`valueOf(String name)` Gets the opcode corresponding to a given mnemonic.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - NOP
```
public static final int NOP
```
    See Also:
    
    Constant Field Values
  - ACONST_NULL
```
public static final int ACONST_NULL
```
    See Also:
    
    Constant Field Values
  - ICONST_M1
```
public static final int ICONST_M1
```
    See Also:
    
    Constant Field Values
  - ICONST_0
```
public static final int ICONST_0
```
    See Also:
    
    Constant Field Values
  - ICONST_1
```
public static final int ICONST_1
```
    See Also:
    
    Constant Field Values
  - ICONST_2
```
public static final int ICONST_2
```
    See Also:
    
    Constant Field Values
  - ICONST_3
```
public static final int ICONST_3
```
    See Also:
    
    Constant Field Values
  - ICONST_4
```
public static final int ICONST_4
```
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    Constant Field Values
  - ICONST_5
```
public static final int ICONST_5
```
    See Also:
    
    Constant Field Values
  - LCONST_0
```
public static final int LCONST_0
```
    See Also:
    
    Constant Field Values
  - LCONST_1
```
public static final int LCONST_1
```
    See Also:
    
    Constant Field Values
  - FCONST_0
```
public static final int FCONST_0
```
    See Also:
    
    Constant Field Values
  - FCONST_1
```
public static final int FCONST_1
```
    See Also:
    
    Constant Field Values
  - FCONST_2
```
public static final int FCONST_2
```
    See Also:
    
    Constant Field Values
  - DCONST_0
```
public static final int DCONST_0
```
    See Also:
    
    Constant Field Values
  - DCONST_1
```
public static final int DCONST_1
```
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    Constant Field Values
  - BIPUSH
```
public static final int BIPUSH
```
    See Also:
    
    Constant Field Values
  - SIPUSH
```
public static final int SIPUSH
```
    See Also:
    
    Constant Field Values
  - LDC
```
public static final int LDC
```
    See Also:
    
    Constant Field Values
  - LDC_W
```
public static final int LDC_W
```
    See Also:
    
    Constant Field Values
  - LDC2_W
```
public static final int LDC2_W
```
    See Also:
    
    Constant Field Values
  - ILOAD
```
public static final int ILOAD
```
    See Also:
    
    Constant Field Values
  - LLOAD
```
public static final int LLOAD
```
    See Also:
    
    Constant Field Values
  - FLOAD
```
public static final int FLOAD
```
    See Also:
    
    Constant Field Values
  - DLOAD
```
public static final int DLOAD
```
    See Also:
    
    Constant Field Values
  - ALOAD
```
public static final int ALOAD
```
    See Also:
    
    Constant Field Values
  - ILOAD_0
```
public static final int ILOAD_0
```
    See Also:
    
    Constant Field Values
  - ILOAD_1
```
public static final int ILOAD_1
```
    See Also:
    
    Constant Field Values
  - ILOAD_2
```
public static final int ILOAD_2
```
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    Constant Field Values
  - ILOAD_3
```
public static final int ILOAD_3
```
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    Constant Field Values
  - LLOAD_0
```
public static final int LLOAD_0
```
    See Also:
    
    Constant Field Values
  - LLOAD_1
```
public static final int LLOAD_1
```
    See Also:
    
    Constant Field Values
  - LLOAD_2
```
public static final int LLOAD_2
```
    See Also:
    
    Constant Field Values
  - LLOAD_3
```
public static final int LLOAD_3
```
    See Also:
    
    Constant Field Values
  - FLOAD_0
```
public static final int FLOAD_0
```
    See Also:
    
    Constant Field Values
  - FLOAD_1
```
public static final int FLOAD_1
```
    See Also:
    
    Constant Field Values
  - FLOAD_2
```
public static final int FLOAD_2
```
    See Also:
    
    Constant Field Values
  - FLOAD_3
```
public static final int FLOAD_3
```
    See Also:
    
    Constant Field Values
  - DLOAD_0
```
public static final int DLOAD_0
```
    See Also:
    
    Constant Field Values
  - DLOAD_1
```
public static final int DLOAD_1
```
    See Also:
    
    Constant Field Values
  - DLOAD_2
```
public static final int DLOAD_2
```
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    Constant Field Values
  - DLOAD_3
```
public static final int DLOAD_3
```
    See Also:
    
    Constant Field Values
  - ALOAD_0
```
public static final int ALOAD_0
```
    See Also:
    
    Constant Field Values
  - ALOAD_1
```
public static final int ALOAD_1
```
    See Also:
    
    Constant Field Values
  - ALOAD_2
```
public static final int ALOAD_2
```
    See Also:
    
    Constant Field Values
  - ALOAD_3
```
public static final int ALOAD_3
```
    See Also:
    
    Constant Field Values
  - IALOAD
```
public static final int IALOAD
```
    See Also:
    
    Constant Field Values
  - LALOAD
```
public static final int LALOAD
```
    See Also:
    
    Constant Field Values
  - FALOAD
```
public static final int FALOAD
```
    See Also:
    
    Constant Field Values
  - DALOAD
```
public static final int DALOAD
```
    See Also:
    
    Constant Field Values
  - AALOAD
```
public static final int AALOAD
```
    See Also:
    
    Constant Field Values
  - BALOAD
```
public static final int BALOAD
```
    See Also:
    
    Constant Field Values
  - CALOAD
```
public static final int CALOAD
```
    See Also:
    
    Constant Field Values
  - SALOAD
```
public static final int SALOAD
```
    See Also:
    
    Constant Field Values
  - ISTORE
```
public static final int ISTORE
```
    See Also:
    
    Constant Field Values
  - LSTORE
```
public static final int LSTORE
```
    See Also:
    
    Constant Field Values
  - FSTORE
```
public static final int FSTORE
```
    See Also:
    
    Constant Field Values
  - DSTORE
```
public static final int DSTORE
```
    See Also:
    
    Constant Field Values
  - ASTORE
```
public static final int ASTORE
```
    See Also:
    
    Constant Field Values
  - ISTORE_0
```
public static final int ISTORE_0
```
    See Also:
    
    Constant Field Values
  - ISTORE_1
```
public static final int ISTORE_1
```
    See Also:
    
    Constant Field Values
  - ISTORE_2
```
public static final int ISTORE_2
```
    See Also:
    
    Constant Field Values
  - ISTORE_3
```
public static final int ISTORE_3
```
    See Also:
    
    Constant Field Values
  - LSTORE_0
```
public static final int LSTORE_0
```
    See Also:
    
    Constant Field Values
  - LSTORE_1
```
public static final int LSTORE_1
```
    See Also:
    
    Constant Field Values
  - LSTORE_2
```
public static final int LSTORE_2
```
    See Also:
    
    Constant Field Values
  - LSTORE_3
```
public static final int LSTORE_3
```
    See Also:
    
    Constant Field Values
  - FSTORE_0
```
public static final int FSTORE_0
```
    See Also:
    
    Constant Field Values
  - FSTORE_1
```
public static final int FSTORE_1
```
    See Also:
    
    Constant Field Values
  - FSTORE_2
```
public static final int FSTORE_2
```
    See Also:
    
    Constant Field Values
  - FSTORE_3
```
public static final int FSTORE_3
```
    See Also:
    
    Constant Field Values
  - DSTORE_0
```
public static final int DSTORE_0
```
    See Also:
    
    Constant Field Values
  - DSTORE_1
```
public static final int DSTORE_1
```
    See Also:
    
    Constant Field Values
  - DSTORE_2
```
public static final int DSTORE_2
```
    See Also:
    
    Constant Field Values
  - DSTORE_3
```
public static final int DSTORE_3
```
    See Also:
    
    Constant Field Values
  - ASTORE_0
```
public static final int ASTORE_0
```
    See Also:
    
    Constant Field Values
  - ASTORE_1
```
public static final int ASTORE_1
```
    See Also:
    
    Constant Field Values
  - ASTORE_2
```
public static final int ASTORE_2
```
    See Also:
    
    Constant Field Values
  - ASTORE_3
```
public static final int ASTORE_3
```
    See Also:
    
    Constant Field Values
  - IASTORE
```
public static final int IASTORE
```
    See Also:
    
    Constant Field Values
  - LASTORE
```
public static final int LASTORE
```
    See Also:
    
    Constant Field Values
  - FASTORE
```
public static final int FASTORE
```
    See Also:
    
    Constant Field Values
  - DASTORE
```
public static final int DASTORE
```
    See Also:
    
    Constant Field Values
  - AASTORE
```
public static final int AASTORE
```
    See Also:
    
    Constant Field Values
  - BASTORE
```
public static final int BASTORE
```
    See Also:
    
    Constant Field Values
  - CASTORE
```
public static final int CASTORE
```
    See Also:
    
    Constant Field Values
  - SASTORE
```
public static final int SASTORE
```
    See Also:
    
    Constant Field Values
  - POP
```
public static final int POP
```
    See Also:
    
    Constant Field Values
  - POP2
```
public static final int POP2
```
    See Also:
    
    Constant Field Values
  - DUP
```
public static final int DUP
```
    See Also:
    
    Constant Field Values
  - DUP_X1
```
public static final int DUP_X1
```
    See Also:
    
    Constant Field Values
  - DUP_X2
```
public static final int DUP_X2
```
    See Also:
    
    Constant Field Values
  - DUP2
```
public static final int DUP2
```
    See Also:
    
    Constant Field Values
  - DUP2_X1
```
public static final int DUP2_X1
```
    See Also:
    
    Constant Field Values
  - DUP2_X2
```
public static final int DUP2_X2
```
    See Also:
    
    Constant Field Values
  - SWAP
```
public static final int SWAP
```
    See Also:
    
    Constant Field Values
  - IADD
```
public static final int IADD
```
    See Also:
    
    Constant Field Values
  - LADD
```
public static final int LADD
```
    See Also:
    
    Constant Field Values
  - FADD
```
public static final int FADD
```
    See Also:
    
    Constant Field Values
  - DADD
```
public static final int DADD
```
    See Also:
    
    Constant Field Values
  - ISUB
```
public static final int ISUB
```
    See Also:
    
    Constant Field Values
  - LSUB
```
public static final int LSUB
```
    See Also:
    
    Constant Field Values
  - FSUB
```
public static final int FSUB
```
    See Also:
    
    Constant Field Values
  - DSUB
```
public static final int DSUB
```
    See Also:
    
    Constant Field Values
  - IMUL
```
public static final int IMUL
```
    See Also:
    
    Constant Field Values
  - LMUL
```
public static final int LMUL
```
    See Also:
    
    Constant Field Values
  - FMUL
```
public static final int FMUL
```
    See Also:
    
    Constant Field Values
  - DMUL
```
public static final int DMUL
```
    See Also:
    
    Constant Field Values
  - IDIV
```
public static final int IDIV
```
    See Also:
    
    Constant Field Values
  - LDIV
```
public static final int LDIV
```
    See Also:
    
    Constant Field Values
  - FDIV
```
public static final int FDIV
```
    See Also:
    
    Constant Field Values
  - DDIV
```
public static final int DDIV
```
    See Also:
    
    Constant Field Values
  - IREM
```
public static final int IREM
```
    See Also:
    
    Constant Field Values
  - LREM
```
public static final int LREM
```
    See Also:
    
    Constant Field Values
  - FREM
```
public static final int FREM
```
    See Also:
    
    Constant Field Values
  - DREM
```
public static final int DREM
```
    See Also:
    
    Constant Field Values
  - INEG
```
public static final int INEG
```
    See Also:
    
    Constant Field Values
  - LNEG
```
public static final int LNEG
```
    See Also:
    
    Constant Field Values
  - FNEG
```
public static final int FNEG
```
    See Also:
    
    Constant Field Values
  - DNEG
```
public static final int DNEG
```
    See Also:
    
    Constant Field Values
  - ISHL
```
public static final int ISHL
```
    See Also:
    
    Constant Field Values
  - LSHL
```
public static final int LSHL
```
    See Also:
    
    Constant Field Values
  - ISHR
```
public static final int ISHR
```
    See Also:
    
    Constant Field Values
  - LSHR
```
public static final int LSHR
```
    See Also:
    
    Constant Field Values
  - IUSHR
```
public static final int IUSHR
```
    See Also:
    
    Constant Field Values
  - LUSHR
```
public static final int LUSHR
```
    See Also:
    
    Constant Field Values
  - IAND
```
public static final int IAND
```
    See Also:
    
    Constant Field Values
  - LAND
```
public static final int LAND
```
    See Also:
    
    Constant Field Values
  - IOR
```
public static final int IOR
```
    See Also:
    
    Constant Field Values
  - LOR
```
public static final int LOR
```
    See Also:
    
    Constant Field Values
  - IXOR
```
public static final int IXOR
```
    See Also:
    
    Constant Field Values
  - LXOR
```
public static final int LXOR
```
    See Also:
    
    Constant Field Values
  - IINC
```
public static final int IINC
```
    See Also:
    
    Constant Field Values
  - I2L
```
public static final int I2L
```
    See Also:
    
    Constant Field Values
  - I2F
```
public static final int I2F
```
    See Also:
    
    Constant Field Values
  - I2D
```
public static final int I2D
```
    See Also:
    
    Constant Field Values
  - L2I
```
public static final int L2I
```
    See Also:
    
    Constant Field Values
  - L2F
```
public static final int L2F
```
    See Also:
    
    Constant Field Values
  - L2D
```
public static final int L2D
```
    See Also:
    
    Constant Field Values
  - F2I
```
public static final int F2I
```
    See Also:
    
    Constant Field Values
  - F2L
```
public static final int F2L
```
    See Also:
    
    Constant Field Values
  - F2D
```
public static final int F2D
```
    See Also:
    
    Constant Field Values
  - D2I
```
public static final int D2I
```
    See Also:
    
    Constant Field Values
  - D2L
```
public static final int D2L
```
    See Also:
    
    Constant Field Values
  - D2F
```
public static final int D2F
```
    See Also:
    
    Constant Field Values
  - I2B
```
public static final int I2B
```
    See Also:
    
    Constant Field Values
  - I2C
```
public static final int I2C
```
    See Also:
    
    Constant Field Values
  - I2S
```
public static final int I2S
```
    See Also:
    
    Constant Field Values
  - LCMP
```
public static final int LCMP
```
    See Also:
    
    Constant Field Values
  - FCMPL
```
public static final int FCMPL
```
    See Also:
    
    Constant Field Values
  - FCMPG
```
public static final int FCMPG
```
    See Also:
    
    Constant Field Values
  - DCMPL
```
public static final int DCMPL
```
    See Also:
    
    Constant Field Values
  - DCMPG
```
public static final int DCMPG
```
    See Also:
    
    Constant Field Values
  - IFEQ
```
public static final int IFEQ
```
    See Also:
    
    Constant Field Values
  - IFNE
```
public static final int IFNE
```
    See Also:
    
    Constant Field Values
  - IFLT
```
public static final int IFLT
```
    See Also:
    
    Constant Field Values
  - IFGE
```
public static final int IFGE
```
    See Also:
    
    Constant Field Values
  - IFGT
```
public static final int IFGT
```
    See Also:
    
    Constant Field Values
  - IFLE
```
public static final int IFLE
```
    See Also:
    
    Constant Field Values
  - IF_ICMPEQ
```
public static final int IF_ICMPEQ
```
    See Also:
    
    Constant Field Values
  - IF_ICMPNE
```
public static final int IF_ICMPNE
```
    See Also:
    
    Constant Field Values
  - IF_ICMPLT
```
public static final int IF_ICMPLT
```
    See Also:
    
    Constant Field Values
  - IF_ICMPGE
```
public static final int IF_ICMPGE
```
    See Also:
    
    Constant Field Values
  - IF_ICMPGT
```
public static final int IF_ICMPGT
```
    See Also:
    
    Constant Field Values
  - IF_ICMPLE
```
public static final int IF_ICMPLE
```
    See Also:
    
    Constant Field Values
  - IF_ACMPEQ
```
public static final int IF_ACMPEQ
```
    See Also:
    
    Constant Field Values
  - IF_ACMPNE
```
public static final int IF_ACMPNE
```
    See Also:
    
    Constant Field Values
  - GOTO
```
public static final int GOTO
```
    See Also:
    
    Constant Field Values
  - JSR
```
public static final int JSR
```
    See Also:
    
    Constant Field Values
  - RET
```
public static final int RET
```
    See Also:
    
    Constant Field Values
  - TABLESWITCH
```
public static final int TABLESWITCH
```
    See Also:
    
    Constant Field Values
  - LOOKUPSWITCH
```
public static final int LOOKUPSWITCH
```
    See Also:
    
    Constant Field Values
  - IRETURN
```
public static final int IRETURN
```
    See Also:
    
    Constant Field Values
  - LRETURN
```
public static final int LRETURN
```
    See Also:
    
    Constant Field Values
  - FRETURN
```
public static final int FRETURN
```
    See Also:
    
    Constant Field Values
  - DRETURN
```
public static final int DRETURN
```
    See Also:
    
    Constant Field Values
  - ARETURN
```
public static final int ARETURN
```
    See Also:
    
    Constant Field Values
  - RETURN
```
public static final int RETURN
```
    See Also:
    
    Constant Field Values
  - GETSTATIC
```
public static final int GETSTATIC
```
    See Also:
    
    Constant Field Values
  - PUTSTATIC
```
public static final int PUTSTATIC
```
    See Also:
    
    Constant Field Values
  - GETFIELD
```
public static final int GETFIELD
```
    See Also:
    
    Constant Field Values
  - PUTFIELD
```
public static final int PUTFIELD
```
    See Also:
    
    Constant Field Values
  - INVOKEVIRTUAL
```
public static final int INVOKEVIRTUAL
```
    See Also:
    
    Constant Field Values
  - INVOKESPECIAL
```
public static final int INVOKESPECIAL
```
    See Also:
    
    Constant Field Values
  - INVOKESTATIC
```
public static final int INVOKESTATIC
```
    See Also:
    
    Constant Field Values
  - INVOKEINTERFACE
```
public static final int INVOKEINTERFACE
```
    See Also:
    
    Constant Field Values
  - INVOKEDYNAMIC
```
public static final int INVOKEDYNAMIC
```
    See Also:
    
    Constant Field Values
  - NEW
```
public static final int NEW
```
    See Also:
    
    Constant Field Values
  - NEWARRAY
```
public static final int NEWARRAY
```
    See Also:
    
    Constant Field Values
  - ANEWARRAY
```
public static final int ANEWARRAY
```
    See Also:
    
    Constant Field Values
  - ARRAYLENGTH
```
public static final int ARRAYLENGTH
```
    See Also:
    
    Constant Field Values
  - ATHROW
```
public static final int ATHROW
```
    See Also:
    
    Constant Field Values
  - CHECKCAST
```
public static final int CHECKCAST
```
    See Also:
    
    Constant Field Values
  - INSTANCEOF
```
public static final int INSTANCEOF
```
    See Also:
    
    Constant Field Values
  - MONITORENTER
```
public static final int MONITORENTER
```
    See Also:
    
    Constant Field Values
  - MONITOREXIT
```
public static final int MONITOREXIT
```
    See Also:
    
    Constant Field Values
  - WIDE
```
public static final int WIDE
```
    See Also:
    
    Constant Field Values
  - MULTIANEWARRAY
```
public static final int MULTIANEWARRAY
```
    See Also:
    
    Constant Field Values
  - IFNULL
```
public static final int IFNULL
```
    See Also:
    
    Constant Field Values
  - IFNONNULL
```
public static final int IFNONNULL
```
    See Also:
    
    Constant Field Values
  - GOTO_W
```
public static final int GOTO_W
```
    See Also:
    
    Constant Field Values
  - JSR_W
```
public static final int JSR_W
```
    See Also:
    
    Constant Field Values
  - BREAKPOINT
```
public static final int BREAKPOINT
```
    See Also:
    
    Constant Field Values
  - ILLEGAL
```
public static final int ILLEGAL
```
    See Also:
    
    Constant Field Values
  - END
```
public static final int END
```
    See Also:
    
    Constant Field Values
  - LAST_JVM_OPCODE
```
public static final int LAST_JVM_OPCODE
```
    The last opcode defined by the JVM specification. To iterate over all JVM bytecodes:
```
 for (int opcode = 0; opcode <= Bytecodes.LAST_JVM_OPCODE; ++opcode) {
     //
 }
 
```
    See Also:
    
    Constant Field Values
  - nameArray
```
private static final String[] nameArray
```
    An array that maps from a bytecode value to a String for the corresponding instruction mnemonic.
  - flagsArray
```
private static final int[] flagsArray
```
    An array that maps from a bytecode value to the set of Bytecodes.Flags for the corresponding instruction.
  - lengthArray
```
private static final int[] lengthArray
```
    An array that maps from a bytecode value to the length in bytes for the corresponding instruction.
  - stackEffectArray
```
private static final int[] stackEffectArray
```
    An array that maps from a bytecode value to the number of slots pushed on the stack by the corresponding instruction.
- Constructor Detail
  - Bytecodes
```
public Bytecodes()
```
- Method Detail
  - isCommutative
```
public static boolean isCommutative(int opcode)
```
    Determines if an opcode is commutative.
    
    Parameters:
    
    opcode - the opcode to check
    
    Returns:
    
    true iff commutative
  - lengthOf
```
public static int lengthOf(int opcode)
```
    Gets the length of an instruction denoted by a given opcode.
    
    Parameters:
    
    opcode - an instruction opcode
    
    Returns:
    
    the length of the instruction denoted by opcode. If opcode is an illegal instruction or denotes a variable length instruction (e.g. TABLESWITCH), then 0 is returned.
  - stackEffectOf
```
public static int stackEffectOf(int opcode)
```
    Gets the effect on the depth of the expression stack of an instruction denoted by a given opcode.
    
    Parameters:
    
    opcode - an instruction opcode
    
    Returns:
    
    the change in the stack caused by the instruction denoted by opcode. If 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.
  - nameOf
```
public static String nameOf(int opcode)
                     throws IllegalArgumentException
```
    Gets the lower-case mnemonic for a given opcode.
    
    Parameters:
    
    opcode - an opcode
    
    Returns:
    
    the mnemonic for opcode or "<illegal opcode: " + opcode + ">" if opcode is not a legal opcode
    
    Throws:
    
    IllegalArgumentException
  - baseNameOf
```
public static String baseNameOf(int opcode)
```
    Allocation-free version of nameOf(int).
    
    Parameters:
    
    opcode - an opcode.
    
    Returns:
    
    the mnemonic for opcode or "<illegal opcode>" if opcode is not a legal opcode.
  - valueOf
```
public static int valueOf(String name)
```
    Gets the opcode corresponding to a given mnemonic.
    
    Parameters:
    
    name - an opcode mnemonic
    
    Returns:
    
    the opcode corresponding to mnemonic
    
    Throws:
    
    IllegalArgumentException - if name does not denote a valid opcode
  - canTrap
```
public static boolean canTrap(int opcode)
```
    Determines if a given opcode denotes an instruction that can cause an implicit exception.
    
    Parameters:
    
    opcode - an opcode to test
    
    Returns:
    
    true iff opcode can cause an implicit exception, false otherwise
  - isLoad
```
public static boolean isLoad(int opcode)
```
    Determines if a given opcode denotes an instruction that loads a local variable to the operand stack.
    
    Parameters:
    
    opcode - an opcode to test
    
    Returns:
    
    true iff opcode loads a local variable to the operand stack, false otherwise
  - isStop
```
public static boolean isStop(int opcode)
```
    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.
    
    Parameters:
    
    opcode - an opcode to test
    
    Returns:
    
    true iff opcode properly ends a basic block
  - isInvoke
```
public static boolean isInvoke(int opcode)
```
    Determines if a given opcode denotes an instruction that stores a value to a local variable after popping it from the operand stack.
    
    Parameters:
    
    opcode - an opcode to test
    
    Returns:
    
    true iff opcode stores a value to a local variable, false otherwise
  - isStore
```
public static boolean isStore(int opcode)
```
    Determines if a given opcode denotes an instruction that stores a value to a local variable after popping it from the operand stack.
    
    Parameters:
    
    opcode - an opcode to test
    
    Returns:
    
    true iff opcode stores a value to a local variable, false otherwise
  - isBlockEnd
```
public static boolean isBlockEnd(int opcode)
```
    Determines if a given opcode is an instruction that delimits a basic block.
    
    Parameters:
    
    opcode - an opcode to test
    
    Returns:
    
    true iff opcode delimits a basic block
  - isBranch
```
public static boolean isBranch(int opcode)
```
    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 switch instructions.
    
    Parameters:
    
    opcode - an opcode to test
    
    Returns:
    
    true iff opcode is a branch instruction with a single operand
  - isConditionalBranch
```
public static boolean isConditionalBranch(int opcode)
```
    Determines if a given opcode denotes a conditional branch.
    
    Parameters:
    
    opcode -
    
    Returns:
    
    true iff opcode is a conditional branch
  - operator
```
public static String operator(int op)
```
    Gets the arithmetic operator name for a given opcode. If opcode does not denote an arithmetic instruction, then the name of the opcode is returned instead.
    
    Parameters:
    
    op - an opcode
    
    Returns:
    
    the arithmetic operator name
  - def
```
private static void def(int opcode,
                        String name,
                        String format,
                        int stackEffect)
```
    Defines a bytecode by entering it into the arrays that record its name, length and flags.
    
    Parameters:
    
    name - instruction name (should be lower case)
    
    format - encodes the length of the instruction
  - def
```
private static void def(int opcode,
                        String name,
                        String format,
                        int stackEffect,
                        int flags)
```
    Defines a bytecode by entering it into the arrays that record its name, length and flags.
    
    Parameters:
    
    name - instruction name (lower case)
    
    format - encodes the length of the instruction
    
    flags - the set of Bytecodes.Flags associated with the instruction

Class Bytecodes

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

NOP

ACONST_NULL

ICONST_M1

ICONST_0

ICONST_1

ICONST_2

ICONST_3

ICONST_4

ICONST_5

LCONST_0

LCONST_1

FCONST_0

FCONST_1

FCONST_2

DCONST_0

DCONST_1

BIPUSH

SIPUSH

LDC

LDC_W

LDC2_W

ILOAD

LLOAD

FLOAD

DLOAD

ALOAD

ILOAD_0

ILOAD_1

ILOAD_2

ILOAD_3

LLOAD_0

LLOAD_1

LLOAD_2

LLOAD_3

FLOAD_0

FLOAD_1

FLOAD_2

FLOAD_3

DLOAD_0

DLOAD_1

DLOAD_2

DLOAD_3

ALOAD_0

ALOAD_1

ALOAD_2

ALOAD_3

IALOAD

LALOAD

FALOAD

DALOAD

AALOAD

BALOAD

CALOAD

SALOAD

ISTORE

LSTORE

FSTORE

DSTORE

ASTORE

ISTORE_0

ISTORE_1

ISTORE_2

ISTORE_3

LSTORE_0

LSTORE_1

LSTORE_2

LSTORE_3

FSTORE_0

FSTORE_1

FSTORE_2

FSTORE_3

DSTORE_0

DSTORE_1