protected internal override uint InternalComputeSize(IAssemblingContext context)
{
if (m_address.OffsetElement != null && !context.IsPositioned(m_address.OffsetElement))
{
return(6); // max size
}
int dispValue = GetDisplacementValue(context);
uint dispCode = GetDisplacementCode(dispValue);
uint dispSize = GetDisplacementSize(dispCode);
if (m_address.Base == null)
{
if (m_address.Index == null)
{
return(5); // modrm + disp32
}
else
{
return(6); // modrm + sib + disp32
}
}
else
{
if (m_address.Base == Register32.ESP)
{
return(2 + dispSize); // modrm + sib + ?
}
else
{
if (m_address.Base == Register32.EBP)
{
if (dispCode == 0)
{
return(3); // modrm + sib + disp8
}
else
{
return(2 + dispSize); // modrm + sib + ?
}
}
else
{
if (m_address.Index == null)
{
return(1 + dispSize); // modrm + ?
}
else
{
return(2 + dispSize); // modrm + sib + ?
}
}
}
}
}
internal override uint ComputeSize(IAssemblingContext context)
{
if (!context.IsPositioned(this) || !context.IsPositioned(m_offsetElement))
{
return(5);
}
UInt32 jmpAddress = context.GetRelativeMemoryAddress(this);
UInt32 refAddress = context.GetRelativeMemoryAddress(m_offsetElement);
int diff = (int)(refAddress - jmpAddress) + m_offsetValue;
if (diff >= -126 && diff <= 129)
{
return(2);
}
else
{
return(5);
}
}
