dspl.backend.x86.operands
Class X86IndexMemoryOperand

java.lang.Object
  dspl.backend.x86.operands.X86Operand
      dspl.backend.x86.operands.X86IndexMemoryOperand

public class X86IndexMemoryOperand
extends X86Operand

X86IndexedMemoryOperand is an operand of the form: variable(base, index, size)

• variable: an 8, 16, or 32 bit value (from parent variable: either array or complex)
• base: (register) or can be null
• index: an index into the variable specified by displacement
• size: the size of the type of the variable (must be either 2, 4, or 8)

Example:
movl $5, %edx
movl $10, a(,%edx,4)
The above is equivalent to a[5] = 10; //assuming a is an int_array (data type of size 4)

Author:

David

Field Summary

private X86Register	baseRegister
private X86Register	indexRegister
private int	size
private java.lang.String	varStr

Fields inherited from class dspl.backend.x86.operands.X86Operand

OPERAND_CLASS_ANY, OPERAND_CLASS_LVALUE, OPERAND_TYPE_IMMEDIATE, OPERAND_TYPE_INDEXED_MEMORY, OPERAND_TYPE_MEMORY, OPERAND_TYPE_REGISTER

Constructor Summary

X86IndexMemoryOperand(java.lang.String var, X86Register baseRegister, X86Register indexRegister, int size)
Used when one wants to explicitly create an IndexMemoryOperand like (%eax, %ecx, 4), which might not have a variable

X86IndexMemoryOperand(Variable var, X86Register baseRegister, X86Register indexRegister, int size)

Method Summary

void	freeOperand() Frees any resources (registers) that have been allocated for the operand
int	getOperandSize() Returns the operand's byte size, should be either 1, 2, or 4
int	getOperandType() Returns the X86Operand type, must be one of X86Operand.OPERAND_TYPE_xxx
java.lang.String	toString()

Methods inherited from class dspl.backend.x86.operands.X86Operand

isMemoryType

Methods inherited from class java.lang.Object

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

Field Detail

varStr

private java.lang.String varStr

baseRegister

private X86Register baseRegister

indexRegister

private X86Register indexRegister

size

private int size

Constructor Detail

X86IndexMemoryOperand

public X86IndexMemoryOperand(java.lang.String var,
                             X86Register baseRegister,
                             X86Register indexRegister,
                             int size)

Used when one wants to explicitly create an IndexMemoryOperand like (%eax, %ecx, 4), which might not have a variable

Parameters:

var -

baseRegister -

indexRegister -

size -

X86IndexMemoryOperand

public X86IndexMemoryOperand(Variable var,
                             X86Register baseRegister,
                             X86Register indexRegister,
                             int size)

Method Detail

freeOperand

public void freeOperand()

Description copied from class: X86Operand

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

Specified by:

freeOperand in class X86Operand

getOperandType

public int getOperandType()

Description copied from class: X86Operand

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

Specified by:

getOperandType in class X86Operand

Returns:

toString

public java.lang.String toString()

Specified by:

toString in class X86Operand

Returns:

gnu assembler-friendly representation of the operand

getOperandSize

public int getOperandSize()

Description copied from class: X86Operand

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

Specified by:

getOperandSize in class X86Operand

Returns: