1 /** @file 2 Calculate the product of a 64-bit integer and a 32-bit integer 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 17 18 /** 19 Multiples a 64-bit unsigned integer by a 32-bit unsigned integer 20 and generates a 64-bit unsigned result. 21 22 This function multiples the 64-bit unsigned value Multiplicand by the 32-bit 23 unsigned value Multiplier and generates a 64-bit unsigned result. This 64- 24 bit unsigned result is returned. 25 26 @param Multiplicand A 64-bit unsigned value. 27 @param Multiplier A 32-bit unsigned value. 28 29 @return Multiplicand * Multiplier 30 31 **/ 32 UINT64 33 EFIAPI 34 InternalMathMultU64x32 ( 35 IN UINT64 Multiplicand, 36 IN UINT32 Multiplier 37 ) 38 { 39 _asm { 40 mov ecx, Multiplier 41 mov eax, ecx 42 imul ecx, dword ptr [Multiplicand + 4] // overflow not detectable 43 mul dword ptr [Multiplicand + 0] 44 add edx, ecx 45 } 46 } 47 48
