Package com.sun.jdo.api.persistence.enhancer.classfile

Class Insn

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 final 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

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 final 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 Details

opc_target

public static final int opc_target

See Also:

• Constant Field Values

Method Details

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