1 /** @file 2 Set error flag for all division functions 3 4 Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php. 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 15 /** 16 Divides a 64-bit unsigned integer by a 32-bit unsigned integer and 17 generates a 64-bit unsigned result and an optional 32-bit unsigned remainder. 18 19 This function divides the 64-bit unsigned value Dividend by the 32-bit 20 unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder 21 is not NULL, then the 32-bit unsigned remainder is returned in Remainder. 22 This function returns the 64-bit unsigned quotient. 23 24 @param Dividend A 64-bit unsigned value. 25 @param Divisor A 32-bit unsigned value. 26 @param Remainder A pointer to a 32-bit unsigned value. This parameter is 27 optional and may be NULL. 28 29 @return Dividend / Divisor 30 31 **/ 32 UINT64 33 EFIAPI 34 InternalMathDivRemU64x32 ( 35 IN UINT64 Dividend, 36 IN UINT32 Divisor, 37 OUT UINT32 *Remainder 38 ) 39 { 40 _asm { 41 mov ecx, Divisor 42 mov eax, dword ptr [Dividend + 4] 43 xor edx, edx 44 div ecx 45 push eax 46 mov eax, dword ptr [Dividend + 0] 47 div ecx 48 mov ecx, Remainder 49 jecxz RemainderNull // abandon remainder if Remainder == NULL 50 mov [ecx], edx 51 RemainderNull: 52 pop edx 53 } 54 } 55 56
