java.lang.Object
- com.sun.jdo.api.persistence.enhancer.classfile.Insn

All Implemented Interfaces:

VMConstants

Direct Known Subclasses:

InsnConstOp, InsnIInc, InsnIntOp, InsnLookupSwitch, InsnMultiDimArrayNew, InsnSingle, InsnTableSwitch, InsnTarget, InsnTargetOp
```
public abstract class Insn
extends Object
implements VMConstants
```
Insn is an abstract class which represents a java VM instruction in a sequence of instructions.

Field Summary

Fields
Modifier and Type Field Description

static int opc_target
- Fields inherited from interface com.sun.jdo.api.persistence.enhancer.classfile.VMConstants
  ACCAbstract, ACCFinal, ACCInterface, ACCNative, ACCPrivate, ACCProtected, ACCPublic, ACCStatic, ACCSuper, ACCSynchronized, ACCTransient, ACCVolatile, CONSTANTClass, CONSTANTDouble, CONSTANTFieldRef, CONSTANTFloat, CONSTANTInteger, CONSTANTInterfaceMethodRef, CONSTANTLong, CONSTANTMethodRef, CONSTANTNameAndType, CONSTANTString, CONSTANTUnicode, CONSTANTUtf8, opc_aaload, opc_aastore, opc_aconst_null, opc_aload, opc_aload_0, opc_aload_1, opc_aload_2, opc_aload_3, opc_anewarray, opc_areturn, opc_arraylength, opc_astore, opc_astore_0, opc_astore_1, opc_astore_2, opc_astore_3, opc_athrow, opc_baload, opc_bastore, opc_bipush, opc_caload, opc_castore, opc_checkcast, opc_d2f, opc_d2i, opc_d2l, opc_dadd, opc_daload, opc_dastore, opc_dcmpg, opc_dcmpl, opc_dconst_0, opc_dconst_1, opc_ddiv, opc_dload, opc_dload_0, opc_dload_1, opc_dload_2, opc_dload_3, opc_dmul, opc_dneg, opc_drem, opc_dreturn, opc_dstore, opc_dstore_0, opc_dstore_1, opc_dstore_2, opc_dstore_3, opc_dsub, opc_dup, opc_dup_x1, opc_dup_x2, opc_dup2, opc_dup2_x1, opc_dup2_x2, opc_f2d, opc_f2i, opc_f2l, opc_fadd, opc_faload, opc_fastore, opc_fcmpg, opc_fcmpl, opc_fconst_0, opc_fconst_1, opc_fconst_2, opc_fdiv, opc_fload, opc_fload_0, opc_fload_1, opc_fload_2, opc_fload_3, opc_fmul, opc_fneg, opc_frem, opc_freturn, opc_fstore, opc_fstore_0, opc_fstore_1, opc_fstore_2, opc_fstore_3, opc_fsub, opc_getfield, opc_getstatic, opc_goto, opc_goto_w, opc_i2b, opc_i2c, opc_i2d, opc_i2f, opc_i2l, opc_i2s, opc_iadd, opc_iaload, opc_iand, opc_iastore, opc_iconst_0, opc_iconst_1, opc_iconst_2, opc_iconst_3, opc_iconst_4, opc_iconst_5, opc_iconst_m1, opc_idiv, opc_if_acmpeq, opc_if_acmpne, opc_if_icmpeq, opc_if_icmpge, opc_if_icmpgt, opc_if_icmple, opc_if_icmplt, opc_if_icmpne, opc_ifeq, opc_ifge, opc_ifgt, opc_ifle, opc_iflt, opc_ifne, opc_ifnonnull, opc_ifnull, opc_iinc, opc_iload, opc_iload_0, opc_iload_1, opc_iload_2, opc_iload_3, opc_imul, opc_ineg, opc_instanceof, opc_invokeinterface, opc_invokespecial, opc_invokestatic, opc_invokevirtual, opc_ior, opc_irem, opc_ireturn, opc_ishl, opc_ishr, opc_istore, opc_istore_0, opc_istore_1, opc_istore_2, opc_istore_3, opc_isub, opc_iushr, opc_ixor, opc_jsr, opc_jsr_w, opc_l2d, opc_l2f, opc_l2i, opc_ladd, opc_laload, opc_land, opc_lastore, opc_lcmp, opc_lconst_0, opc_lconst_1, opc_ldc, opc_ldc_w, opc_ldc2_w, opc_ldiv, opc_lload, opc_lload_0, opc_lload_1, opc_lload_2, opc_lload_3, opc_lmul, opc_lneg, opc_lookupswitch, opc_lor, opc_lrem, opc_lreturn, opc_lshl, opc_lshr, opc_lstore, opc_lstore_0, opc_lstore_1, opc_lstore_2, opc_lstore_3, opc_lsub, opc_lushr, opc_lxor, opc_monitorenter, opc_monitorexit, opc_multianewarray, opc_new, opc_newarray, opc_nop, opc_pop, opc_pop2, opc_putfield, opc_putstatic, opc_ret, opc_return, opc_saload, opc_sastore, opc_sipush, opc_swap, opc_tableswitch, opc_wide, opc_xxxunusedxxx, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, T_TWOWORD, T_UNKNOWN, T_WORD, TC_INTERFACE, TC_OBJECT, TC_STRING

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`Insn`	`append(Insn i)`	Append an instruction sequence at the end of this instruction sequence.
`abstract String`	`argTypes()`	What are the types of the stack operands ?
`abstract boolean`	`branches()`	Does this instruction branch?
`static Insn`	`create(int theOpCode)`	Create an instruction which requires no immediate operands
`static Insn`	`create(int theOpCode, int intValue)`	Create an instruction which requires a single integral constant as an immediate operand.
`static Insn`	`create(int theOpCode, ConstBasic constValue)`	Create an instruction which requires a single constant from the constant pool as an immediate operand.
`static Insn`	`create(int theOpCode, InsnTarget target)`	Create an instruction which requires a single branch offset as an immediate operand.
`Insn`	`insert(Insn i)`	Insert an instruction sequence in the code sequence after this instruction.
`static int`	`loadStoreDataType(int opcode)`	Return the type of value manipulated by the load/store instruction
`void`	`markTargets()`	Mark possible branch targets
`Insn`	`next()`	Returns the next instruction in the code sequence
`abstract int`	`nStackArgs()`	How many words of stack operands does this instruction take?
`abstract int`	`nStackResults()`	How many words of stack results does this instruction deposit?
`int`	`offset()`	Return the offset of this instruction in the containing code sequence
`int`	`opcode()`	Return the opcode for this instruction
`static String`	`opName(int opcode)`	Return the name of the operation for a given opcode
`Insn`	`prev()`	Returns the previous instruction in the code sequence
`void`	`printInsn(PrintStream out)`	Print this instruction to the output stream
`void`	`printList(PrintStream out)`	Print the sequence of instructions to the output stream
`void`	`remove()`	Removes the current instruction from it's embedding sequence.
`abstract String`	`resultTypes()`	What are the types of the stack results?
`Insn`	`setNext(Insn i)`	Insert the single instruction in the code sequence after this instruction.

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

- Field Detail
  - opc_target
```
public static final int opc_target
```
    See Also:
    
    Constant Field Values
- Method Detail
  - next
```
public Insn next()
```
    Returns the next instruction in the code sequence
  - prev
```
public Insn prev()
```
    Returns the previous instruction in the code sequence
  - remove
```
public void remove()
```
    Removes the current instruction from it's embedding sequence.
  - setNext
```
public Insn setNext(Insn i)
```
    Insert the single instruction in the code sequence after this instruction. Returns the inserted instruction.
  - insert
```
public Insn insert(Insn i)
```
    Insert an instruction sequence in the code sequence after this instruction. Returns the final instruction.
  - append
```
public Insn append(Insn i)
```
    Append an instruction sequence at the end of this instruction sequence. Returns the final instruction.
  - opcode
```
public int opcode()
```
    Return the opcode for this instruction
  - offset
```
public int offset()
```
    Return the offset of this instruction in the containing code sequence
  - nStackArgs
```
public abstract int nStackArgs()
```
    How many words of stack operands does this instruction take?
  - nStackResults
```
public abstract int nStackResults()
```
    How many words of stack results does this instruction deposit?
  - argTypes
```
public abstract String argTypes()
```
    What are the types of the stack operands ?
  - resultTypes
```
public abstract String resultTypes()
```
    What are the types of the stack results?
  - branches
```
public abstract boolean branches()
```
    Does this instruction branch?
  - markTargets
```
public void markTargets()
```
    Mark possible branch targets
  - opName
```
public static String opName(int opcode)
```
    Return the name of the operation for a given opcode
  - create
```
public static Insn create(int theOpCode)
```
    Create an instruction which requires no immediate operands
  - create
```
public static Insn create(int theOpCode,
                          ConstBasic constValue)
```
    Create an instruction which requires a single constant from the constant pool as an immediate operand.
  - create
```
public static Insn create(int theOpCode,
                          int intValue)
```
    Create an instruction which requires a single integral constant as an immediate operand.
  - create
```
public static Insn create(int theOpCode,
                          InsnTarget target)
```
    Create an instruction which requires a single branch offset as an immediate operand.
  - printList
```
public void printList(PrintStream out)
```
    Print the sequence of instructions to the output stream
  - printInsn
```
public void printInsn(PrintStream out)
```
    Print this instruction to the output stream
  - loadStoreDataType
```
public static final int loadStoreDataType(int opcode)
```
    Return the type of value manipulated by the load/store instruction

Class Insn

Field Summary

Fields inherited from interface com.sun.jdo.api.persistence.enhancer.classfile.VMConstants

Method Summary

Methods inherited from class java.lang.Object

Field Detail

opc_target

Method Detail

next

prev

remove

setNext

insert

append

opcode

offset

nStackArgs

nStackResults

argTypes

resultTypes

branches

markTargets

opName

create

create

create

create

printList

printInsn

loadStoreDataType