/** @file Set error flag for all division functions Copyright (c) 2006 - 2007, Intel Corporation
All rights reserved. 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 } }