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View Full Version : quick question about __allrem function

dive2code
December 8th, 2004, 07:58
I have a quick question about __all??? (__alldiv, _allmul, __allrem) function.
I googled and got only that these funtions are related with int64 converstion.
But I couldn't find any stuff explaing that.
Plz let me know the the definition, meaning or reference.

This code is what I met.

Code:
push 0

push 1Ah

push FFFFFFFF

push 80000011h

call __allrem


After the call, debuger showed changed register values,
such as EAX=FFFFFFF9, ECX=1A, EDX=FFFFFFFF, EBX=0

Thank you
Neitsa
December 8th, 2004, 15:15
Hello,
I've disasembled those functions from ntdll. Here's what I guess they do :

Code:


//******************

//*_alldiv.NTDLL

//******************

LONGLONG WINAPI _alldiv( LONGLONG a, LONGLONG b )

{

    return a / b;

}





//******************

//*_allmul.NTDLL

//******************

LONGLONG WINAPI _allmul( LONGLONG a, LONGLONG b )

{

    return a * b;

}





//******************

//*_allrem.NTDLL

//******************

LONGLONG WINAPI _allrem( LONGLONG a, LONGLONG b )

{

    return a % b;

}





//******************

// * _aulldiv.NTDLL

// ******************

ULONGLONG WINAPI _aulldiv( ULONGLONG a, ULONGLONG b )

{

    return a / b;

}





//*******************

// *_aullrem.NTDLL

// ******************

ULONGLONG WINAPI _aullrem( ULONGLONG a, ULONGLONG b )

{

    return a % b;

}


Hope it could help...

Regards, Neitsa.
TQN
December 8th, 2004, 21:26
Hi dive2code !
If you have Visual Studio 6 or VS .NET, go to the CRT\Src\Intel directory, and you will see the llmul.asm, lldiv.asm, llrem.asm... They are source code of _alldiv, _allmul, _allrem functions.
Regards,
TQN
dive2code
December 8th, 2004, 23:48
Thanx so much Neitsa, TQN