1 /** @file 2 Calculate the quotient of a 64-bit integer by a 32-bit integer 3 4 Copyright (c) 2006 - 2010, 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 17 18 /** 19 Divides a 64-bit unsigned integer by a 32-bit unsigned integer and 20 generates a 64-bit unsigned result. 21 22 This function divides the 64-bit unsigned value Dividend by the 32-bit 23 unsigned value Divisor and generates a 64-bit unsigned quotient. This 24 function returns the 64-bit unsigned quotient. 25 26 @param Dividend A 64-bit unsigned value. 27 @param Divisor A 32-bit unsigned value. 28 29 @return Dividend / Divisor 30 31 **/ 32 UINT64 33 EFIAPI 34 InternalMathDivU64x32 ( 35 IN UINT64 Dividend, 36 IN UINT32 Divisor 37 ) 38 { 39 _asm { 40 mov eax, dword ptr [Dividend + 4] 41 mov ecx, Divisor 42 xor edx, edx 43 div ecx 44 push eax ; save quotient on stack 45 mov eax, dword ptr [Dividend] 46 div ecx 47 pop edx ; restore high-order dword of the quotient 48 } 49 } 50 51
