/** @file | |
Calculate the product of a 64-bit integer and another 64-bit integer | |
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
/** | |
Multiplies a 64-bit unsigned integer by a 64-bit unsigned integer | |
and generates a 64-bit unsigned result. | |
This function multiplies the 64-bit unsigned value Multiplicand by the 64-bit | |
unsigned value Multiplier and generates a 64-bit unsigned result. This 64- | |
bit unsigned result is returned. | |
@param Multiplicand A 64-bit unsigned value. | |
@param Multiplier A 64-bit unsigned value. | |
@return Multiplicand * Multiplier | |
**/ | |
UINT64 | |
EFIAPI | |
InternalMathMultU64x64 ( | |
IN UINT64 Multiplicand, | |
IN UINT64 Multiplier | |
) | |
{ | |
_asm { | |
mov ebx, dword ptr [Multiplicand + 0] | |
mov edx, dword ptr [Multiplier + 0] | |
mov ecx, ebx | |
mov eax, edx | |
imul ebx, dword ptr [Multiplier + 4] | |
imul edx, dword ptr [Multiplicand + 4] | |
add ebx, edx | |
mul ecx | |
add edx, ebx | |
} | |
} |