VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/math/tanl.asm@ 81106

Last change on this file since 81106 was 76553, checked in by vboxsync, 6 years ago

scm --update-copyright-year

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 1.5 KB
Line 
1; $Id: tanl.asm 76553 2019-01-01 01:45:53Z vboxsync $
2;; @file
3; IPRT - No-CRT tanl - AMD64 & X86.
4;
5
6;
7; Copyright (C) 2006-2019 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 "iprt/asmdefs.mac"
28
29BEGINCODE
30
31;;
32; Compute the sine of lrd
33; @returns st(0)
34; @param lrd [xSP + xCB*2]
35BEGINPROC RT_NOCRT(tanl)
36 push xBP
37 mov xBP, xSP
38 sub xSP, 10h
39
40 fld tword [xBP + xCB*2]
41 fptan
42 fnstsw ax
43 test ah, 04h ; check for C2
44 jz .done
45
46 fldpi
47 fadd st0
48 fxch st1
49.again:
50 fprem1
51 fnstsw ax
52 test ah, 04h
53 jnz .again
54 fstp st1
55 fptan
56
57.done:
58 fstp st0
59 leave
60 ret
61ENDPROC RT_NOCRT(tanl)
62
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