Enum Class Opcode

java.lang.Object

java.lang.Enum<Opcode>

java.lang.classfile.Opcode

All Implemented Interfaces:

Serializable, Comparable<Opcode>, Constable

public enum Opcode
extends Enum<Opcode>

Describes the opcodes of the JVM instruction set, as described in JVMS . This includes a few pseudo-opcodes modified by wide.

An opcode describes the operation of an instruction.

Since:

24

See Also:

• Instruction

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	Opcode.Kind	Kinds of opcodes.

Nested classes/interfaces inherited from class Enum

Enum.EnumDesc<E>

Enum Constant Summary

Enum Constants

Enum Constant	Description
AALOAD	Load reference from array.
AASTORE	Store into reference array.
ACONST_NULL	Push null.
ALOAD	Load reference from local variable.
ALOAD_0	Load reference from local variable slot 0.
ALOAD_1	Load reference from local variable slot 1.
ALOAD_2	Load reference from local variable slot 2.
ALOAD_3	Load reference from local variable slot 3.
ALOAD_W	Load reference from local variable (wide index).
ANEWARRAY	Create new array of reference.
ARETURN	Return reference from method.
ARRAYLENGTH	Get length of array.
ASTORE	Store reference into local variable.
ASTORE_0	Store reference into local variable slot 0.
ASTORE_1	Store reference into local variable slot 1.
ASTORE_2	Store reference into local variable slot 2.
ASTORE_3	Store reference into local variable slot 3.
ASTORE_W	Store reference into local variable (wide index).
ATHROW	Throw exception or error.
BALOAD	Load byte or boolean from array.
BASTORE	Store into byte or boolean array.
BIPUSH	Push int value from sign-extension of immediate byte value.
CALOAD	Load char from array.
CASTORE	Store into char array.
CHECKCAST	Check whether object is of given type.
D2F	Convert double to float.
D2I	Convert double to int.
D2L	Convert double to long.
DADD	Add double.
DALOAD	Load double from array.
DASTORE	Store into double array.
DCMPG	Compare double.
DCMPL	Compare double.
DCONST_0	Push double constant 0.0D.
DCONST_1	Push double constant 1.0D.
DDIV	Divide double.
DLOAD	Load double from local variable.
DLOAD_0	Load double from local variable slot 0.
DLOAD_1	Load double from local variable slot 1.
DLOAD_2	Load double from local variable slot 2.
DLOAD_3	Load double from local variable slot 3.
DLOAD_W	Load double from local variable (wide index).
DMUL	Multiply double.
DNEG	Negate double.
DREM	Remainder double.
DRETURN	Return double from method.
DSTORE	Store double into local variable.
DSTORE_0	Store double into local variable slot 0.
DSTORE_1	Store double into local variable slot 1.
DSTORE_2	Store double into local variable slot 2.
DSTORE_3	Store double into local variable slot 3.
DSTORE_W	Store double into local variable (wide index).
DSUB	Subtract double.
DUP	Duplicate the top operand stack value.
DUP_X1	Duplicate the top operand stack value and insert two values down.
DUP_X2	Duplicate the top operand stack value and insert two or three values down.
DUP2	Duplicate the top one or two operand stack values.
DUP2_X1	Duplicate the top one or two operand stack values and insert two or three values down.
DUP2_X2	Duplicate the top one or two operand stack values and insert two, three, or four values down.
F2D	Convert float to double.
F2I	Convert float to int.
F2L	Convert float to long.
FADD	Add float.
FALOAD	Load float from array.
FASTORE	Store into float array.
FCMPG	Compare float.
FCMPL	Compare float.
FCONST_0	Push float constant 0.0F.
FCONST_1	Push float constant 1.0F.
FCONST_2	Push float constant 2.0F.
FDIV	Divide float.
FLOAD	Load float from local variable.
FLOAD_0	Load float from local variable slot 0.
FLOAD_1	Load float from local variable slot 1.
FLOAD_2	Load float from local variable slot 2.
FLOAD_3	Load float from local variable slot 3.
FLOAD_W	Load float from local variable (wide index).
FMUL	Multiply float.
FNEG	Negate float.
FREM	Remainder float.
FRETURN	Return float from method.
FSTORE	Store float into local variable.
FSTORE_0	Store float into local variable slot 0.
FSTORE_1	Store float into local variable slot 1.
FSTORE_2	Store float into local variable slot 2.
FSTORE_3	Store float into local variable slot 3.
FSTORE_W	Store float into local variable (wide index).
FSUB	Subtract float.
GETFIELD	Fetch field from object.
GETSTATIC	Get static field from class.
GOTO	Branch always.
GOTO_W	Branch always (wide index).
I2B	Convert int to byte.
I2C	Convert int to char.
I2D	Convert int to double.
I2F	Convert int to float.
I2L	Convert int to long.
I2S	Convert int to short.
IADD	Add int.
IALOAD	Load int from array.
IAND	Bitwise AND int.
IASTORE	Store into int array.
ICONST_0	Push int constant 0.
ICONST_1	Push int constant 1.
ICONST_2	Push int constant 2.
ICONST_3	Push int constant 3.
ICONST_4	Push int constant 4.
ICONST_5	Push int constant 5.
ICONST_M1	Push int constant -1.
IDIV	Divide int.
IF_ACMPEQ	Branch if reference comparison operand1 == operand2 succeeds.
IF_ACMPNE	Branch if reference comparison operand1 != operand2 succeeds.
IF_ICMPEQ	Branch if int comparison operand1 == operand2 succeeds.
IF_ICMPGE	Branch if int comparison operand1 >= operand2 succeeds.
IF_ICMPGT	Branch if int comparison operand1 > operand2 succeeds.
IF_ICMPLE	Branch if int comparison operand1 <= operand2 succeeds.
IF_ICMPLT	Branch if int comparison operand1 < operand2 succeeds.
IF_ICMPNE	Branch if int comparison operand1 != operand2 succeeds.
IFEQ	Branch if int comparison == 0 succeeds.
IFGE	Branch if int comparison >= 0 succeeds.
IFGT	Branch if int comparison > 0 succeeds.
IFLE	Branch if int comparison <= 0 succeeds.
IFLT	Branch if int comparison < 0 succeeds.
IFNE	Branch if int comparison != 0 succeeds.
IFNONNULL	Branch if reference is not null.
IFNULL	Branch if reference is null.
IINC	Increment int local variable by constant.
IINC_W	Increment local variable by constant (wide index).
ILOAD	Load int from local variable.
ILOAD_0	Load int from local variable slot 0.
ILOAD_1	Load int from local variable slot 1.
ILOAD_2	Load int from local variable slot 2.
ILOAD_3	Load int from local variable slot 3.
ILOAD_W	Load int from local variable (wide index).
IMUL	Multiply int.
INEG	Negate int.
INSTANCEOF	Determine if object is of given type.
INVOKEDYNAMIC	Invoke a dynamically-computed call site.
INVOKEINTERFACE	Invoke interface method.
INVOKESPECIAL	Invoke instance method; direct invocation of instance initialization methods and methods of the current class and its supertypes.
INVOKESTATIC	Invoke a class (static) method.
INVOKEVIRTUAL	Invoke instance method; dispatch based on class.
IOR	Bitwise OR int.
IREM	Remainder int.
IRETURN	Return int from method.
ISHL	Shift left int.
ISHR	Arithmetic shift right int.
ISTORE	Store int into local variable.
ISTORE_0	Store int into local variable slot 0.
ISTORE_1	Store int into local variable slot 1.
ISTORE_2	Store int into local variable slot 2.
ISTORE_3	Store int into local variable slot 3.
ISTORE_W	Store int into local variable (wide index).
ISUB	Subtract int.
IUSHR	Logical shift right int.
IXOR	Bitwise XOR int.
JSR	(Discontinued) Jump subroutine; last used in major version 50.
JSR_W	(Discontinued) Jump subroutine (wide index); last used in major version 50.
L2D	Convert long to double.
L2F	Convert long to float.
L2I	Convert long to int.
LADD	Add long.
LALOAD	Load long from array.
LAND	Bitwise AND long.
LASTORE	Store into long array.
LCMP	Compare long.
LCONST_0	Push long constant 0L.
LCONST_1	Push long constant 1L.
LDC	Push item from run-time constant pool.
LDC_W	Push item from run-time constant pool (wide index).
LDC2_W	Push long or double from run-time constant pool (wide index).
LDIV	Divide long.
LLOAD	Load long from local variable.
LLOAD_0	Load long from local variable slot 0.
LLOAD_1	Load long from local variable slot 1.
LLOAD_2	Load long from local variable slot 2.
LLOAD_3	Load long from local variable slot 3.
LLOAD_W	Load long from local variable (wide index).
LMUL	Multiply long.
LNEG	Negate long.
LOOKUPSWITCH	Access jump table by key match and jump.
LOR	Bitwise OR long.
LREM	Remainder long.
LRETURN	Return long from method.
LSHL	Shift left long.
LSHR	Arithmetic shift right long.
LSTORE	Store long into local variable.
LSTORE_0	Store long into local variable slot 0.
LSTORE_1	Store long into local variable slot 1.
LSTORE_2	Store long into local variable slot 2.
LSTORE_3	Store long into local variable slot 3.
LSTORE_W	Store long into local variable (wide index).
LSUB	Subtract long.
LUSHR	Logical shift right long.
LXOR	Bitwise XOR long.
MONITORENTER	Enter monitor for object.
MONITOREXIT	Exit monitor for object.
MULTIANEWARRAY	Create new multidimensional array.
NEW	Create new object.
NEWARRAY	Create new array.
NOP	Do nothing.
POP	Pop the top operand stack value.
POP2	Pop the top one or two operand stack values.
PUTFIELD	Set field in object.
PUTSTATIC	Set static field in class.
RET	(Discontinued) Return from subroutine; last used in major version 50.
RET_W	(Discontinued) Return from subroutine (wide index); last used in major version 50.
RETURN	Return void from method.
SALOAD	Load short from array.
SASTORE	Store into short array.
SIPUSH	Push int value from sign-extension of immediate short value.
SWAP	Swap the top two operand stack values.
TABLESWITCH	Access jump table by index and jump.

Method Summary

Modifier and Type	Method	Description
int	bytecode()	Returns the opcode value.
boolean	isWide()	Returns true if this is a pseudo-opcode modified by wide opcode.
Opcode.Kind	kind()	Returns operation kind.
int	sizeIfFixed()	Returns size of the instruction in bytes if fixed, or -1 otherwise.
static Opcode	valueOf(String name)	Returns the enum constant of this class with the specified name.
static Opcode[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

NOP

public static final Opcode NOP

Do nothing.

See Also:

• Opcode.Kind.NOP

ACONST_NULL

public static final Opcode ACONST_NULL

Push null.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

ICONST_M1

public static final Opcode ICONST_M1

Push int constant -1.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

ICONST_0

public static final Opcode ICONST_0

Push int constant 0.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

ICONST_1

public static final Opcode ICONST_1

Push int constant 1.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

ICONST_2

public static final Opcode ICONST_2

Push int constant 2.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

ICONST_3

public static final Opcode ICONST_3

Push int constant 3.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

ICONST_4

public static final Opcode ICONST_4

Push int constant 4.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

ICONST_5

public static final Opcode ICONST_5

Push int constant 5.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

LCONST_0

public static final Opcode LCONST_0

Push long constant 0L.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

LCONST_1

public static final Opcode LCONST_1

Push long constant 1L.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

FCONST_0

public static final Opcode FCONST_0

Push float constant 0.0F.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

FCONST_1

public static final Opcode FCONST_1

Push float constant 1.0F.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

FCONST_2

public static final Opcode FCONST_2

Push float constant 2.0F.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

DCONST_0

public static final Opcode DCONST_0

Push double constant 0.0D.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

DCONST_1

public static final Opcode DCONST_1

Push double constant 1.0D.

See Also:

• ConstantInstruction.IntrinsicConstantInstruction
• Opcode.Kind.CONSTANT

BIPUSH

public static final Opcode BIPUSH

Push int value from sign-extension of immediate byte value.

See Also:

• ConstantInstruction.ArgumentConstantInstruction
• Opcode.Kind.CONSTANT

SIPUSH

public static final Opcode SIPUSH

Push int value from sign-extension of immediate short value.

See Also:

• ConstantInstruction.ArgumentConstantInstruction
• Opcode.Kind.CONSTANT

LDC

public static final Opcode LDC

Push item from run-time constant pool.

See Also:

• ConstantInstruction.LoadConstantInstruction
• Opcode.Kind.CONSTANT

LDC_W

public static final Opcode LDC_W

Push item from run-time constant pool (wide index).

See Also:

• ConstantInstruction.LoadConstantInstruction
• Opcode.Kind.CONSTANT

LDC2_W

public static final Opcode LDC2_W

Push long or double from run-time constant pool (wide index).

See Also:

• ConstantInstruction.LoadConstantInstruction
• Opcode.Kind.CONSTANT

ILOAD

public static final Opcode ILOAD

Load int from local variable.

See Also:

• Opcode.Kind.LOAD

LLOAD

public static final Opcode LLOAD

Load long from local variable.

See Also:

• Opcode.Kind.LOAD

FLOAD

public static final Opcode FLOAD

Load float from local variable.

See Also:

• Opcode.Kind.LOAD

DLOAD

public static final Opcode DLOAD

Load double from local variable.

See Also:

• Opcode.Kind.LOAD

ALOAD

public static final Opcode ALOAD

Load reference from local variable.

See Also:

• Opcode.Kind.LOAD

ILOAD_0

public static final Opcode ILOAD_0

Load int from local variable slot 0.

See Also:

• Opcode.Kind.LOAD

ILOAD_1

public static final Opcode ILOAD_1

Load int from local variable slot 1.

See Also:

• Opcode.Kind.LOAD

ILOAD_2

public static final Opcode ILOAD_2

Load int from local variable slot 2.

See Also:

• Opcode.Kind.LOAD

ILOAD_3

public static final Opcode ILOAD_3

Load int from local variable slot 3.

See Also:

• Opcode.Kind.LOAD

LLOAD_0

public static final Opcode LLOAD_0

Load long from local variable slot 0.

See Also:

• Opcode.Kind.LOAD

LLOAD_1

public static final Opcode LLOAD_1

Load long from local variable slot 1.

See Also:

• Opcode.Kind.LOAD

LLOAD_2

public static final Opcode LLOAD_2

Load long from local variable slot 2.

See Also:

• Opcode.Kind.LOAD

LLOAD_3

public static final Opcode LLOAD_3

Load long from local variable slot 3.

See Also:

• Opcode.Kind.LOAD

FLOAD_0

public static final Opcode FLOAD_0

Load float from local variable slot 0.

See Also:

• Opcode.Kind.LOAD

FLOAD_1

public static final Opcode FLOAD_1

Load float from local variable slot 1.

See Also:

• Opcode.Kind.LOAD

FLOAD_2

public static final Opcode FLOAD_2

Load float from local variable slot 2.

See Also:

• Opcode.Kind.LOAD

FLOAD_3

public static final Opcode FLOAD_3

Load float from local variable slot 3.

See Also:

• Opcode.Kind.LOAD

DLOAD_0

public static final Opcode DLOAD_0

Load double from local variable slot 0.

See Also:

• Opcode.Kind.LOAD

DLOAD_1

public static final Opcode DLOAD_1

Load double from local variable slot 1.

See Also:

• Opcode.Kind.LOAD

DLOAD_2

public static final Opcode DLOAD_2

Load double from local variable slot 2.

See Also:

• Opcode.Kind.LOAD

DLOAD_3

public static final Opcode DLOAD_3

Load double from local variable slot 3.

See Also:

• Opcode.Kind.LOAD

ALOAD_0

public static final Opcode ALOAD_0

Load reference from local variable slot 0.

See Also:

• Opcode.Kind.LOAD

ALOAD_1

public static final Opcode ALOAD_1

Load reference from local variable slot 1.

See Also:

• Opcode.Kind.LOAD

ALOAD_2

public static final Opcode ALOAD_2

Load reference from local variable slot 2.

See Also:

• Opcode.Kind.LOAD

ALOAD_3

public static final Opcode ALOAD_3

Load reference from local variable slot 3.

See Also:

• Opcode.Kind.LOAD

IALOAD

public static final Opcode IALOAD

Load int from array.

See Also:

• Opcode.Kind.ARRAY_LOAD

LALOAD

public static final Opcode LALOAD

Load long from array.

See Also:

• Opcode.Kind.ARRAY_LOAD

FALOAD

public static final Opcode FALOAD

Load float from array.

See Also:

• Opcode.Kind.ARRAY_LOAD

DALOAD

public static final Opcode DALOAD

Load double from array.

See Also:

• Opcode.Kind.ARRAY_LOAD

AALOAD

public static final Opcode AALOAD

Load reference from array.

See Also:

• Opcode.Kind.ARRAY_LOAD

BALOAD

public static final Opcode BALOAD

Load byte or boolean from array.

See Also:

• Opcode.Kind.ARRAY_LOAD

CALOAD

public static final Opcode CALOAD

Load char from array.

See Also:

• Opcode.Kind.ARRAY_LOAD

SALOAD

public static final Opcode SALOAD

Load short from array.

See Also:

• Opcode.Kind.ARRAY_LOAD

ISTORE

public static final Opcode ISTORE

Store int into local variable.

See Also:

• Opcode.Kind.STORE

LSTORE

public static final Opcode LSTORE

Store long into local variable.

See Also:

• Opcode.Kind.STORE

FSTORE

public static final Opcode FSTORE

Store float into local variable.

See Also:

• Opcode.Kind.STORE

DSTORE

public static final Opcode DSTORE

Store double into local variable.

See Also:

• Opcode.Kind.STORE

ASTORE

public static final Opcode ASTORE

Store reference into local variable. Can also store the returnAddress type.

See Also:

• Opcode.Kind.STORE

ISTORE_0

public static final Opcode ISTORE_0

Store int into local variable slot 0.

See Also:

• Opcode.Kind.STORE

ISTORE_1

public static final Opcode ISTORE_1

Store int into local variable slot 1.

See Also:

• Opcode.Kind.STORE

ISTORE_2

public static final Opcode ISTORE_2

Store int into local variable slot 2.

See Also:

• Opcode.Kind.STORE

ISTORE_3

public static final Opcode ISTORE_3

Store int into local variable slot 3.

See Also:

• Opcode.Kind.STORE

LSTORE_0

public static final Opcode LSTORE_0

Store long into local variable slot 0.

See Also:

• Opcode.Kind.STORE

LSTORE_1

public static final Opcode LSTORE_1

Store long into local variable slot 1.

See Also:

• Opcode.Kind.STORE

LSTORE_2

public static final Opcode LSTORE_2

Store long into local variable slot 2.

See Also:

• Opcode.Kind.STORE

LSTORE_3

public static final Opcode LSTORE_3

Store long into local variable slot 3.

See Also:

• Opcode.Kind.STORE

FSTORE_0

public static final Opcode FSTORE_0

Store float into local variable slot 0.

See Also:

• Opcode.Kind.STORE

FSTORE_1

public static final Opcode FSTORE_1

Store float into local variable slot 1.

See Also:

• Opcode.Kind.STORE

FSTORE_2

public static final Opcode FSTORE_2

Store float into local variable slot 2.

See Also:

• Opcode.Kind.STORE

FSTORE_3

public static final Opcode FSTORE_3

Store float into local variable slot 3.

See Also:

• Opcode.Kind.STORE

DSTORE_0

public static final Opcode DSTORE_0

Store double into local variable slot 0.

See Also:

• Opcode.Kind.STORE

DSTORE_1

public static final Opcode DSTORE_1

Store double into local variable slot 1.

See Also:

• Opcode.Kind.STORE

DSTORE_2

public static final Opcode DSTORE_2

Store double into local variable slot 2.

See Also:

• Opcode.Kind.STORE

DSTORE_3

public static final Opcode DSTORE_3

Store double into local variable slot 3.

See Also:

• Opcode.Kind.STORE

ASTORE_0

public static final Opcode ASTORE_0

Store reference into local variable slot 0. Can also store the returnAddress type.

See Also:

• Opcode.Kind.STORE

ASTORE_1

public static final Opcode ASTORE_1

Store reference into local variable slot 1. Can also store the returnAddress type.

See Also:

• Opcode.Kind.STORE

ASTORE_2

public static final Opcode ASTORE_2

Store reference into local variable slot 2. Can also store the returnAddress type.

See Also:

• Opcode.Kind.STORE

ASTORE_3

public static final Opcode ASTORE_3

Store reference into local variable slot 3. Can also store the returnAddress type.

See Also:

• Opcode.Kind.STORE

IASTORE

public static final Opcode IASTORE

Store into int array.

See Also:

• Opcode.Kind.ARRAY_STORE

LASTORE

public static final Opcode LASTORE

Store into long array.

See Also:

• Opcode.Kind.ARRAY_STORE

FASTORE

public static final Opcode FASTORE

Store into float array.

See Also:

• Opcode.Kind.ARRAY_STORE

DASTORE

public static final Opcode DASTORE

Store into double array.

See Also:

• Opcode.Kind.ARRAY_STORE

AASTORE

public static final Opcode AASTORE

Store into reference array.

See Also:

• Opcode.Kind.ARRAY_STORE

BASTORE

public static final Opcode BASTORE

Store into byte or boolean array.

See Also:

• Opcode.Kind.ARRAY_STORE

CASTORE

public static final Opcode CASTORE

Store into char array.

See Also:

• Opcode.Kind.ARRAY_STORE

SASTORE

public static final Opcode SASTORE

Store into short array.

See Also:

• Opcode.Kind.ARRAY_STORE

POP

public static final Opcode POP

Pop the top operand stack value.

See Also:

• Opcode.Kind.STACK

POP2

public static final Opcode POP2

Pop the top one or two operand stack values.

See Also:

• Opcode.Kind.STACK

DUP

public static final Opcode DUP

Duplicate the top operand stack value.

See Also:

• Opcode.Kind.STACK

DUP_X1

public static final Opcode DUP_X1

Duplicate the top operand stack value and insert two values down.

See Also:

• Opcode.Kind.STACK

DUP_X2

public static final Opcode DUP_X2

Duplicate the top operand stack value and insert two or three values down.

See Also:

• Opcode.Kind.STACK

DUP2

public static final Opcode DUP2

Duplicate the top one or two operand stack values.

See Also:

• Opcode.Kind.STACK

DUP2_X1

public static final Opcode DUP2_X1

Duplicate the top one or two operand stack values and insert two or three values down.

See Also:

• Opcode.Kind.STACK

DUP2_X2

public static final Opcode DUP2_X2

Duplicate the top one or two operand stack values and insert two, three, or four values down.

See Also:

• Opcode.Kind.STACK

SWAP

public static final Opcode SWAP

Swap the top two operand stack values.

See Also:

• Opcode.Kind.STACK

IADD

public static final Opcode IADD

Add int.

See Also:

• Opcode.Kind.OPERATOR

LADD

public static final Opcode LADD

Add long.

See Also:

• Opcode.Kind.OPERATOR

FADD

public static final Opcode FADD

Add float.

See Also:

• Opcode.Kind.OPERATOR

DADD

public static final Opcode DADD

Add double.

See Also:

• Opcode.Kind.OPERATOR

ISUB

public static final Opcode ISUB

Subtract int.

See Also:

• Opcode.Kind.OPERATOR

LSUB

public static final Opcode LSUB

Subtract long.

See Also:

• Opcode.Kind.OPERATOR

FSUB

public static final Opcode FSUB

Subtract float.

See Also:

• Opcode.Kind.OPERATOR

DSUB

public static final Opcode DSUB

Subtract double.

See Also:

• Opcode.Kind.OPERATOR

IMUL

public static final Opcode IMUL

Multiply int.

See Also:

• Opcode.Kind.OPERATOR

LMUL

public static final Opcode LMUL

Multiply long.

See Also:

• Opcode.Kind.OPERATOR

FMUL

public static final Opcode FMUL

Multiply float.

See Also:

• Opcode.Kind.OPERATOR

DMUL

public static final Opcode DMUL

Multiply double.

See Also:

• Opcode.Kind.OPERATOR

IDIV

public static final Opcode IDIV

Divide int.

See Also:

• Opcode.Kind.OPERATOR

LDIV

public static final Opcode LDIV

Divide long.

See Also:

• Opcode.Kind.OPERATOR

FDIV

public static final Opcode FDIV

Divide float.

See Also:

• Opcode.Kind.OPERATOR

DDIV

public static final Opcode DDIV

Divide double.

See Also:

• Opcode.Kind.OPERATOR

IREM

public static final Opcode IREM

Remainder int.

See Also:

• Opcode.Kind.OPERATOR

LREM

public static final Opcode LREM

Remainder long.

See Also:

• Opcode.Kind.OPERATOR

FREM

public static final Opcode FREM

Remainder float.

See Also:

• Opcode.Kind.OPERATOR

DREM

public static final Opcode DREM

Remainder double.

See Also:

• Opcode.Kind.OPERATOR

INEG

public static final Opcode INEG

Negate int.

See Also:

• Opcode.Kind.OPERATOR

LNEG

public static final Opcode LNEG

Negate long.

See Also:

• Opcode.Kind.OPERATOR

FNEG

public static final Opcode FNEG

Negate float.

See Also:

• Opcode.Kind.OPERATOR

DNEG

public static final Opcode DNEG

Negate double.

See Also:

• Opcode.Kind.OPERATOR

ISHL

public static final Opcode ISHL

Shift left int.

See Also:

• Opcode.Kind.OPERATOR

LSHL

public static final Opcode LSHL

Shift left long.

See Also:

• Opcode.Kind.OPERATOR

ISHR

public static final Opcode ISHR

Arithmetic shift right int.

See Also:

• Opcode.Kind.OPERATOR

LSHR

public static final Opcode LSHR

Arithmetic shift right long.

See Also:

• Opcode.Kind.OPERATOR

IUSHR

public static final Opcode IUSHR

Logical shift right int.

See Also:

• Opcode.Kind.OPERATOR

LUSHR

public static final Opcode LUSHR

Logical shift right long.

See Also:

• Opcode.Kind.OPERATOR

IAND

public static final Opcode IAND

Bitwise AND int.

See Also:

• Opcode.Kind.OPERATOR

LAND

public static final Opcode LAND

Bitwise AND long.

See Also:

• Opcode.Kind.OPERATOR

IOR

public static final Opcode IOR

Bitwise OR int.

See Also:

• Opcode.Kind.OPERATOR

LOR

public static final Opcode LOR

Bitwise OR long.

See Also:

• Opcode.Kind.OPERATOR

IXOR

public static final Opcode IXOR

Bitwise XOR int.

See Also:

• Opcode.Kind.OPERATOR

LXOR

public static final Opcode LXOR

Bitwise XOR long.

See Also:

• Opcode.Kind.OPERATOR

IINC

public static final Opcode IINC

Increment int local variable by constant.

See Also:

• Opcode.Kind.INCREMENT

I2L

public static final Opcode I2L

Convert int to long.

See Also:

• Opcode.Kind.CONVERT

I2F

public static final Opcode I2F

Convert int to float.

See Also:

• Opcode.Kind.CONVERT

I2D

public static final Opcode I2D

Convert int to double.

See Also:

• Opcode.Kind.CONVERT

L2I

public static final Opcode L2I

Convert long to int.

See Also:

• Opcode.Kind.CONVERT

L2F

public static final Opcode L2F

Convert long to float.

See Also:

• Opcode.Kind.CONVERT

L2D

public static final Opcode L2D

Convert long to double.

See Also:

• Opcode.Kind.CONVERT

F2I

public static final Opcode F2I

Convert float to int.

See Also:

• Opcode.Kind.CONVERT

F2L

public static final Opcode F2L

Convert float to long.

See Also:

• Opcode.Kind.CONVERT

F2D

public static final Opcode F2D

Convert float to double.

See Also:

• Opcode.Kind.CONVERT

D2I

public static final Opcode D2I

Convert double to int.

See Also:

• Opcode.Kind.CONVERT

D2L

public static final Opcode D2L

Convert double to long.

See Also:

• Opcode.Kind.CONVERT

D2F

public static final Opcode D2F

Convert double to float.

See Also:

• Opcode.Kind.CONVERT

I2B

public static final Opcode I2B

Convert int to byte. This is as if storing the computational int into a byte and loading it back.

See Also:

• Opcode.Kind.CONVERT

I2C

public static final Opcode I2C

Convert int to char. This is as if storing the computational int into a char and loading it back.

See Also:

• Opcode.Kind.CONVERT

I2S

public static final Opcode I2S

Convert int to short. This is as if storing the computational int into a short and loading it back.

See Also:

• Opcode.Kind.CONVERT

LCMP

public static final Opcode LCMP

Compare long.

See Also:

• Long.compare(long, long)
• Opcode.Kind.OPERATOR

FCMPL

public static final Opcode FCMPL

Compare float. Produces -1 if any operand is NaN.

See Also:

• Floating-point Equality, Equivalence, and Comparison
• Opcode.Kind.OPERATOR

FCMPG

public static final Opcode FCMPG

Compare float. Produces 1 if any operand is NaN.

See Also:

• Floating-point Equality, Equivalence, and Comparison
• Opcode.Kind.OPERATOR

DCMPL

public static final Opcode DCMPL

Compare double. Produces -1 if any operand is NaN.

See Also:

• Floating-point Equality, Equivalence, and Comparison
• Opcode.Kind.OPERATOR

DCMPG

public static final Opcode DCMPG

Compare double. Produces 1 if any operand is NaN.

See Also:

• Floating-point Equality, Equivalence, and Comparison
• Opcode.Kind.OPERATOR

IFEQ

public static final Opcode IFEQ

Branch if int comparison == 0 succeeds.

See Also:

• Opcode.Kind.BRANCH

IFNE

public static final Opcode IFNE

Branch if int comparison != 0 succeeds.

See Also:

• Opcode.Kind.BRANCH

IFLT

public static final Opcode IFLT

Branch if int comparison < 0 succeeds.

See Also:

• Opcode.Kind.BRANCH

IFGE

public static final Opcode IFGE

Branch if int comparison >= 0 succeeds.

See Also:

• Opcode.Kind.BRANCH

IFGT

public static final Opcode IFGT

Branch if int comparison > 0 succeeds.

See Also:

• Opcode.Kind.BRANCH

IFLE

public static final Opcode IFLE

Branch if int comparison <= 0 succeeds.

See Also:

• Opcode.Kind.BRANCH

IF_ICMPEQ

public static final Opcode IF_ICMPEQ

Branch if int comparison operand1 == operand2 succeeds.

See Also:

• Opcode.Kind.BRANCH

IF_ICMPNE

public static final Opcode IF_ICMPNE

Branch if int comparison operand1 != operand2 succeeds.

See Also:

• Opcode.Kind.BRANCH

IF_ICMPLT

public static final Opcode IF_ICMPLT

Branch if int comparison operand1 < operand2 succeeds.

See Also:

• Opcode.Kind.BRANCH

IF_ICMPGE

public static final Opcode IF_ICMPGE

Branch if int comparison operand1 >= operand2 succeeds.

See Also:

• Opcode.Kind.BRANCH

IF_ICMPGT

public static final Opcode IF_ICMPGT

Branch if int comparison operand1 > operand2 succeeds.

See Also:

• Opcode.Kind.BRANCH

IF_ICMPLE

public static final Opcode IF_ICMPLE

Branch if int comparison operand1 <= operand2 succeeds.

See Also:

• Opcode.Kind.BRANCH

IF_ACMPEQ

public static final Opcode IF_ACMPEQ

Branch if reference comparison operand1 == operand2 succeeds.

See Also:

• Opcode.Kind.BRANCH

IF_ACMPNE

public static final Opcode IF_ACMPNE

Branch if reference comparison operand1 != operand2 succeeds.

See Also:

• Opcode.Kind.BRANCH

GOTO

public static final Opcode GOTO

Branch always.

See Also:

• Opcode.Kind.BRANCH

JSR

public static final Opcode JSR

(Discontinued) Jump subroutine; last used in major version 50.

See Also:

• Opcode.Kind.DISCONTINUED_JSR

RET

public static final Opcode RET

(Discontinued) Return from subroutine; last used in major version 50.

See Also:

• Opcode.Kind.DISCONTINUED_RET

TABLESWITCH

public static final Opcode TABLESWITCH

Access jump table by index and jump.

See Also:

• Opcode.Kind.TABLE_SWITCH

LOOKUPSWITCH

public static final Opcode LOOKUPSWITCH

Access jump table by key match and jump.

See Also:

• Opcode.Kind.LOOKUP_SWITCH

IRETURN

public static final Opcode IRETURN

Return int from method.

See Also:

• Opcode.Kind.RETURN

LRETURN

public static final Opcode LRETURN

Return long from method.

See Also:

• Opcode.Kind.RETURN

FRETURN

public static final Opcode FRETURN

Return float from method.

See Also:

• Opcode.Kind.RETURN

DRETURN

public static final Opcode DRETURN

Return double from method.

See Also:

• Opcode.Kind.RETURN

ARETURN

public static final Opcode ARETURN

Return reference from method.

See Also:

• Opcode.Kind.RETURN

RETURN

public static final Opcode RETURN

Return void from method.

See Also:

• Opcode.Kind.RETURN

GETSTATIC

public static final Opcode GETSTATIC

Get static field from class.

See Also:

• Opcode.Kind.FIELD_ACCESS

PUTSTATIC

public static final Opcode PUTSTATIC

Set static field in class.

See Also:

• Opcode.Kind.FIELD_ACCESS

GETFIELD

public static final Opcode GETFIELD

Fetch field from object.

See Also:

• Opcode.Kind.FIELD_ACCESS

PUTFIELD

public static final Opcode PUTFIELD

Set field in object.

See Also:

• Opcode.Kind.FIELD_ACCESS

INVOKEVIRTUAL

public static final Opcode INVOKEVIRTUAL

Invoke instance method; dispatch based on class.

See Also:

• Opcode.Kind.INVOKE

INVOKESPECIAL

public static final Opcode INVOKESPECIAL

Invoke instance method; direct invocation of instance initialization methods and methods of the current class and its supertypes.

See Also:

• Opcode.Kind.INVOKE

INVOKESTATIC

public static final Opcode INVOKESTATIC

Invoke a class (static) method.

See Also:

• Opcode.Kind.INVOKE

INVOKEINTERFACE

public static final Opcode INVOKEINTERFACE

Invoke interface method.

See Also:

• Opcode.Kind.INVOKE

INVOKEDYNAMIC

public static final Opcode INVOKEDYNAMIC

Invoke a dynamically-computed call site.

See Also:

• Opcode.Kind.INVOKE_DYNAMIC

NEW

public static final Opcode NEW

Create new object.

See Also:

• Opcode.Kind.NEW_OBJECT

NEWARRAY

public static final Opcode NEWARRAY

Create new array.

See Also:

• Opcode.Kind.NEW_PRIMITIVE_ARRAY

ANEWARRAY

public static final Opcode ANEWARRAY

Create new array of reference.

See Also:

• Opcode.Kind.NEW_REF_ARRAY

ARRAYLENGTH

public static final Opcode ARRAYLENGTH

Get length of array.

See Also:

• Opcode.Kind.OPERATOR

ATHROW

public static final Opcode ATHROW

Throw exception or error.

See Also:

• Opcode.Kind.THROW_EXCEPTION

CHECKCAST

public static final Opcode CHECKCAST

Check whether object is of given type.

See Also:

• Class.cast(Object)
• Opcode.Kind.TYPE_CHECK

INSTANCEOF

public static final Opcode INSTANCEOF

Determine if object is of given type.

See Also:

• Class.isInstance(Object)
• Opcode.Kind.TYPE_CHECK

MONITORENTER

public static final Opcode MONITORENTER

Enter monitor for object.

See Also:

• Opcode.Kind.MONITOR

MONITOREXIT

public static final Opcode MONITOREXIT

Exit monitor for object.

See Also:

• Opcode.Kind.MONITOR

MULTIANEWARRAY

public static final Opcode MULTIANEWARRAY

Create new multidimensional array.

See Also:

• Opcode.Kind.NEW_MULTI_ARRAY

IFNULL

public static final Opcode IFNULL

Branch if reference is null.

See Also:

• Opcode.Kind.BRANCH

IFNONNULL

public static final Opcode IFNONNULL

Branch if reference is not null.

See Also:

• Opcode.Kind.BRANCH

GOTO_W

public static final Opcode GOTO_W

Branch always (wide index).

See Also:

• Opcode.Kind.BRANCH

JSR_W

public static final Opcode JSR_W

(Discontinued) Jump subroutine (wide index); last used in major version 50.

See Also:

• Opcode.Kind.DISCONTINUED_JSR

ILOAD_W

public static final Opcode ILOAD_W

Load int from local variable (wide index). This is a wide-modified pseudo-opcode.

See Also:

• Opcode.Kind.LOAD

LLOAD_W

public static final Opcode LLOAD_W

Load long from local variable (wide index). This is a wide-modified pseudo-opcode.

See Also:

• Opcode.Kind.LOAD

FLOAD_W

public static final Opcode FLOAD_W

Load float from local variable (wide index). This is a wide-modified pseudo-opcode.

See Also:

• Opcode.Kind.LOAD

DLOAD_W

public static final Opcode DLOAD_W

Load double from local variable (wide index). This is a wide-modified pseudo-opcode.

See Also:

• Opcode.Kind.LOAD

ALOAD_W

public static final Opcode ALOAD_W

Load reference from local variable (wide index). This is a wide-modified pseudo-opcode.

See Also:

• Opcode.Kind.LOAD

ISTORE_W

public static final Opcode ISTORE_W

Store int into local variable (wide index). This is a wide-modified pseudo-opcode.

See Also:

• Opcode.Kind.STORE

LSTORE_W

public static final Opcode LSTORE_W

Store long into local variable (wide index). This is a wide-modified pseudo-opcode.

See Also:

• Opcode.Kind.STORE

FSTORE_W

public static final Opcode FSTORE_W

Store float into local variable (wide index). This is a wide-modified pseudo-opcode.

See Also:

• Opcode.Kind.STORE

DSTORE_W

public static final Opcode DSTORE_W

Store double into local variable (wide index). This is a wide-modified pseudo-opcode.

See Also:

• Opcode.Kind.STORE

ASTORE_W

public static final Opcode ASTORE_W

Store reference into local variable (wide index). This is a wide-modified pseudo-opcode. Can also store the returnAddress type.

See Also:

• Opcode.Kind.STORE

RET_W

public static final Opcode RET_W

(Discontinued) Return from subroutine (wide index); last used in major version 50. This is a wide-modified pseudo-opcode.

See Also:

• Opcode.Kind.DISCONTINUED_RET

IINC_W

public static final Opcode IINC_W

Increment local variable by constant (wide index). This is a wide-modified pseudo-opcode.

See Also:

• Opcode.Kind.INCREMENT

Method Details

values

public static Opcode[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static Opcode valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

bytecode

public int bytecode()

Returns the opcode value. For wide pseudo-opcodes, returns the first 2 bytes of the instruction, which are the wide opcode 196 (0xC4) and the functional opcode, as a U2 value.

Returns:

the opcode value

isWide

public boolean isWide()

Returns true if this is a pseudo-opcode modified by wide opcode.

wide extends local variable index by additional bytes.

Returns:

true if this is a pseudo-opcode modified by wide opcode

See Also:

• ILOAD_W
• LLOAD_W
• FLOAD_W
• DLOAD_W
• ALOAD_W
• ISTORE_W
• LSTORE_W
• FSTORE_W
• DSTORE_W
• ASTORE_W
• RET_W
• IINC_W

sizeIfFixed

public int sizeIfFixed()

Returns size of the instruction in bytes if fixed, or -1 otherwise. This size includes the opcode itself.

Returns:

size of the instruction in bytes if fixed, or -1 otherwise

See Also:

• Instruction::sizeInBytes

kind

public Opcode.Kind kind()

Returns operation kind. Each kind of operation has its own modeling interface to model instructions belonging to that kind.

Returns:

operation kind