/** @file | |
Calculate the product of a 64-bit integer and a 32-bit integer | |
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
/** | |
Multiples a 64-bit unsigned integer by a 32-bit unsigned integer | |
and generates a 64-bit unsigned result. | |
This function multiples the 64-bit unsigned value Multiplicand by the 32-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 32-bit unsigned value. | |
@return Multiplicand * Multiplier | |
**/ | |
UINT64 | |
EFIAPI | |
InternalMathMultU64x32 ( | |
IN UINT64 Multiplicand, | |
IN UINT32 Multiplier | |
) | |
{ | |
_asm { | |
mov ecx, Multiplier | |
mov eax, ecx | |
imul ecx, dword ptr [Multiplicand + 4] // overflow not detectable | |
mul dword ptr [Multiplicand + 0] | |
add edx, ecx | |
} | |
} |