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
InternalMathMultU64x32(IN UINT64 Multiplicand,IN UINT32 Multiplier)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