blob: 061301f5597244a20ab80af0e64b11116767bfc5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
;------------------------------------------------------------------------------
;
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
; This program and the accompanying materials
; are licensed and made available under the terms and conditions of the BSD License
; which accompanies this distribution. The full text of the license may be found at
; http://opensource.org/licenses/bsd-license.php.
;
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
;
; Module Name:
;
; MultU64x64.asm
;
; Abstract:
;
; Calculate the product of a 64-bit integer and another 64-bit integer
;
;------------------------------------------------------------------------------
.386
.model flat,C
.code
;------------------------------------------------------------------------------
; UINT64
; EFIAPI
; InternalMathMultU64x64 (
; IN UINT64 Multiplicand,
; IN UINT64 Multiplier
; );
;------------------------------------------------------------------------------
InternalMathMultU64x64 PROC USES ebx
mov ebx, [esp + 8] ; ebx <- M1[0..31]
mov edx, [esp + 16] ; edx <- M2[0..31]
mov ecx, ebx
mov eax, edx
imul ebx, [esp + 20] ; ebx <- M1[0..31] * M2[32..63]
imul edx, [esp + 12] ; edx <- M1[32..63] * M2[0..31]
add ebx, edx ; carries are abandoned
mul ecx ; edx:eax <- M1[0..31] * M2[0..31]
add edx, ebx ; carries are abandoned
ret
InternalMathMultU64x64 ENDP
END
|
