VirtualBox

source: vbox/trunk/src/VBox/Runtime/math/llrintl.asm@ 2981

Last change on this file since 2981 was 1, checked in by vboxsync, 55 years ago

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1; $Id: llrintl.asm 1 1970-01-01 00:00:00Z vboxsync $
2;; @file
3; InnoTek Portable Runtime - No-CRT llrintl - AMD64 & X86.
4;
5
6;
7; Copyright (C) 2006 InnoTek Systemberatung GmbH
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 as published by the Free Software Foundation,
13; in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14; distribution. VirtualBox OSE is distributed in the hope that it will
15; be useful, but WITHOUT ANY WARRANTY of any kind.
16;
17; If you received this file as part of a commercial VirtualBox
18; distribution, then only the terms of your commercial VirtualBox
19; license agreement apply instead of the previous paragraph.
20;
21
22%include "iprt/asmdefs.mac"
23
24BEGINCODE
25
26%ifdef __AMD64__
27 %define _SP rsp
28 %define _BP rbp
29 %define _S 8
30%else
31 %define _SP esp
32 %define _BP ebp
33 %define _S 4
34%endif
35
36;;
37; Round rd to the nearest integer value, rounding according to the current rounding direction.
38; @returns 32-bit: edx:eax 64-bit: rax
39; @param lrd [rbp + _S*2]
40BEGINPROC RT_NOCRT(llrintl)
41 push _BP
42 mov _BP, _SP
43 sub _SP, 10h
44
45 fld tword [_BP + _S*2]
46 fistp qword [_SP]
47 fwait
48%ifdef __AMD64__
49 mov rax, [_SP]
50%else
51 mov eax, [_SP]
52 mov edx, [_SP + 4]
53%endif
54
55 leave
56 ret
57ENDPROC RT_NOCRT(llrintl)
58
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