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Engine directory for ticket #1

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DavidWyand-GG 2012-09-19 11:15:01 -04:00
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Engine/lib/opcode/Ice/IceUtils.cpp Normal file
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Contains misc. useful macros & defines.
* \file IceUtils.cpp
* \author Pierre Terdiman (collected from various sources)
* \date April, 4, 2000
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#include "../Opcode.h"
using namespace IceCore;
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Returns the alignment of the input address.
* \fn Alignment()
* \param address [in] address to check
* \return the best alignment (e.g. 1 for odd addresses, etc)
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
udword IceCore::Alignment(udword address)
{
// Returns 0 for null addresses
if(!address) return 0;
// Test all bits
udword Align = 1;
for(udword i=1;i<32;i++)
{
// Returns as soon as the alignment is broken
if(address&Align) return Align;
Align<<=1;
}
// Here all bits are null, except the highest one (else the address would be null)
return Align;
}