mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-28 12:25:19 +01:00
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/** @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
|
|
}
|
|
}
|
|
|