VirtualBox

source: vbox/trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-wc16-U8DR.asm@ 79611

Last change on this file since 79611 was 76553, checked in by vboxsync, 6 years ago

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1; $Id: bs3-wc16-U8DR.asm 76553 2019-01-01 01:45:53Z vboxsync $
2;; @file
3; BS3Kit - 16-bit Watcom C/C++, 64-bit unsigned integer modulo.
4;
5
6;
7; Copyright (C) 2007-2019 Oracle Corporation
8;
9; This file is part of VirtualBox Open Source Edition (OSE), as
10; available from http://www.virtualbox.org. This file is free software;
11; you can redistribute it and/or modify it under the terms of the GNU
12; General Public License (GPL) as published by the Free Software
13; Foundation, in version 2 as it comes in the "COPYING" file of the
14; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16;
17; The contents of this file may alternatively be used under the terms
18; of the Common Development and Distribution License Version 1.0
19; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20; VirtualBox OSE distribution, in which case the provisions of the
21; CDDL are applicable instead of those of the GPL.
22;
23; You may elect to license modified versions of this file under the
24; terms and conditions of either the GPL or the CDDL or both.
25;
26
27%include "bs3kit-template-header.mac"
28
29BS3_EXTERN_CMN Bs3UInt64Div
30
31
32;;
33; 64-bit unsigned integer modulo, SS variant.
34;
35; @returns ax:bx:cx:dx reminder. (AX is the most significant, DX the least)
36; @param ax:bx:cx:dx Dividend.
37; @param [ss:si] Divisor
38;
39; @uses Nothing.
40;
41global $_?U8DR
42$_?U8DR:
43 push es
44 push ss
45 pop es
46%ifdef ASM_MODEL_FAR_CODE
47 push cs
48%endif
49 call $_?U8DRE
50 pop es
51%ifdef ASM_MODEL_FAR_CODE
52 retf
53%else
54 ret
55%endif
56
57;;
58; 64-bit unsigned integer modulo, ES variant.
59;
60; @returns ax:bx:cx:dx reminder. (AX is the most significant, DX the least)
61; @param ax:bx:cx:dx Dividend.
62; @param [es:si] Divisor
63;
64; @uses Nothing.
65;
66global $_?U8DRE
67$_?U8DRE:
68 push ds
69 push es
70
71 ;
72 ; Convert to a C __cdecl call - not doing this in assembly.
73 ;
74
75 ; Set up a frame of sorts, allocating 16 bytes for the result buffer.
76 push bp
77 sub sp, 10h
78 mov bp, sp
79
80 ; Pointer to the return buffer.
81 push ss
82 push bp
83 add bp, 10h ; Correct bp.
84
85 ; The divisor.
86 push word [es:si + 6]
87 push word [es:si + 4]
88 push word [es:si + 2]
89 push word [es:si]
90
91 ; The dividend.
92 push ax
93 push bx
94 push cx
95 push dx
96
97 call Bs3UInt64Div
98
99 ; Load the reminder.
100 mov ax, [bp - 10h + 8 + 6]
101 mov bx, [bp - 10h + 8 + 4]
102 mov cx, [bp - 10h + 8 + 2]
103 mov dx, [bp - 10h + 8]
104
105 mov sp, bp
106 pop bp
107 pop es
108 pop ds
109%ifdef ASM_MODEL_FAR_CODE
110 retf
111%else
112 ret
113%endif
114
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