You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
1.7 KiB
56 lines
1.7 KiB
/** @file
|
|
Set error flag for all division functions
|
|
|
|
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
|
|
This program and the accompanying materials
|
|
are licensed and made available under the terms and conditions of the BSD License
|
|
which accompanies this distribution. The full text of the license may be found at
|
|
http://opensource.org/licenses/bsd-license.php.
|
|
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
|
**/
|
|
|
|
/**
|
|
Divides a 64-bit unsigned integer by a 32-bit unsigned integer and
|
|
generates a 64-bit unsigned result and an optional 32-bit unsigned remainder.
|
|
|
|
This function divides the 64-bit unsigned value Dividend by the 32-bit
|
|
unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder
|
|
is not NULL, then the 32-bit unsigned remainder is returned in Remainder.
|
|
This function returns the 64-bit unsigned quotient.
|
|
|
|
@param Dividend A 64-bit unsigned value.
|
|
@param Divisor A 32-bit unsigned value.
|
|
@param Remainder A pointer to a 32-bit unsigned value. This parameter is
|
|
optional and may be NULL.
|
|
|
|
@return Dividend / Divisor
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
InternalMathDivRemU64x32 (
|
|
IN UINT64 Dividend,
|
|
IN UINT32 Divisor,
|
|
OUT UINT32 *Remainder
|
|
)
|
|
{
|
|
_asm {
|
|
mov ecx, Divisor
|
|
mov eax, dword ptr [Dividend + 4]
|
|
xor edx, edx
|
|
div ecx
|
|
push eax
|
|
mov eax, dword ptr [Dividend + 0]
|
|
div ecx
|
|
mov ecx, Remainder
|
|
jecxz RemainderNull // abandon remainder if Remainder == NULL
|
|
mov [ecx], edx
|
|
RemainderNull:
|
|
pop edx
|
|
}
|
|
}
|
|
|