/** @file | |
Set error flag for all division functions | |
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
/** | |
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 | |
} | |
} |