dspl.backend.x86.operands
Class X86Operand

java.lang.Object
  dspl.backend.x86.operands.X86Operand

Direct Known Subclasses:

X86ImmediateOperand, X86IndexMemoryOperand, X86MemoryOperand, X86Register

public abstract class X86Operand
extends java.lang.Object

Base Class representing an operand to an X86 instruction
See IA32 Manual 1: 3.7 Operand Addressing

Operand types:
• Immediate
• Register
• Memory

Author:

David

Field Summary

static int	OPERAND_CLASS_ANY
static int	OPERAND_CLASS_LVALUE Class of operands that can be on the destination end of an operation (so called lvalue becuase they can appear on the left of a "dest = arg" expressioN)
static int	OPERAND_TYPE_IMMEDIATE
static int	OPERAND_TYPE_INDEXED_MEMORY
static int	OPERAND_TYPE_MEMORY
static int	OPERAND_TYPE_REGISTER

Constructor Summary

X86Operand()

Method Summary

abstract void	freeOperand() Frees any resources (registers) that have been allocated for the operand
abstract int	getOperandSize() Returns the operand's byte size, should be either 1, 2, or 4
abstract int	getOperandType() Returns the X86Operand type, must be one of X86Operand.OPERAND_TYPE_xxx
boolean	isMemoryType() Returns whether the Operand contains a memory-based type (either OPERAND_TYPE_MEMORY or OPERAND_TYPE_INDEXED_MEMORY)
abstract java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

OPERAND_TYPE_IMMEDIATE

public static final int OPERAND_TYPE_IMMEDIATE

See Also:

Constant Field Values

OPERAND_TYPE_MEMORY

public static final int OPERAND_TYPE_MEMORY

See Also:

Constant Field Values

OPERAND_TYPE_INDEXED_MEMORY

public static final int OPERAND_TYPE_INDEXED_MEMORY

See Also:

Constant Field Values

OPERAND_TYPE_REGISTER

public static final int OPERAND_TYPE_REGISTER

See Also:

Constant Field Values

OPERAND_CLASS_LVALUE

public static final int OPERAND_CLASS_LVALUE

Class of operands that can be on the destination end of an operation (so called lvalue becuase they can appear on the left of a "dest = arg" expressioN)

See Also:

Constant Field Values

OPERAND_CLASS_ANY

public static final int OPERAND_CLASS_ANY

See Also:

Constant Field Values

Constructor Detail

X86Operand

public X86Operand()

Method Detail

isMemoryType

public boolean isMemoryType()

Returns whether the Operand contains a memory-based type (either OPERAND_TYPE_MEMORY or OPERAND_TYPE_INDEXED_MEMORY)

Returns:

true if operand is a memory-based operand

freeOperand

public abstract void freeOperand()

Frees any resources (registers) that have been allocated for the operand

getOperandType

public abstract int getOperandType()

Returns the X86Operand type, must be one of X86Operand.OPERAND_TYPE_xxx

Returns:

getOperandSize

public abstract int getOperandSize()

Returns the operand's byte size, should be either 1, 2, or 4

Returns:

toString

public abstract java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

gnu assembler-friendly representation of the operand